# Struct secureblackbox::FTPClient

The FTPClient struct provides client-side functionality for FTP and FTPS protocols.

## Syntax

```text
secureblackbox::FTPClient
```

## Remarks

FTPClient provides client-side support for the FTP (File Transfer Protocol) and FTPS (FTP-over-SSL) protocols. The FTPS protocol allows you to securely perform file transfer operations with a remote server over Transport Layer Security (TLS).

Note: TLS is a successor to the now deprecated SSL protocol, although the latter abbreviation is still widely used.

FTPClient is typically used in the following scenario:

- Setting up the connection parameters
- Connecting to the server and signing in
- Performing file transfer operations
- Closing the connection

### Setting up the parameters

 When working with FTP or FTP-over-TLS service you will often need to tune up several classes of settings:

- Login credentials: these can be tuned up via the [username](#username-property-ftpclient-struct) and [password](#password-property-ftpclient-struct) properties.
- TLS settings: these includes the TLS mode: explicit, implicit, or no TLS. You must get this setting right; otherwise you may not be able to connect. Use tls_settings property to adjust this setting.
- If your server requires you to authenticate with a certificate, you can provide one via the tls_client_chain property.
- FTPClient validates the server certificate against the local security settings. If your server uses a custom or non-public PKI, you may need to provide the required trust anchors and CA certificates via the trusted_certificates and known_certificates collections.
- FTP protocol includes its own set of settings, such as [passive_mode](#passive_mode-property-ftpclient-struct), [encrypt_data_channel](#encrypt_data_channel-property-ftpclient-struct), or [adjust_pasv_address](#adjust_pasv_address-property-ftpclient-struct). These may be configured on this stage, or later into the connection.
- In some network environments, you may also need to make adjustments to socket_settings and proxy.

### Connecting to the server and signing in

 Call [connect](#connect-method-ftpclient-struct) to open the connection to the server. The component will use the provided credentials to sign you in automatically.

### Performing file transfer operations

 FTPClient offers the full set of FTP operations. These include file uploads ([upload_file](#upload_file-method-ftpclient-struct) or [upload_bytes](#upload_bytes-method-ftpclient-struct)), file downloads ([download_file](#download_file-method-ftpclient-struct), [download_bytes](#download_bytes-method-ftpclient-struct)), and directory operations ([list_dir](#list_dir-method-ftpclient-struct), [make_dir](#make_dir-method-ftpclient-struct)).

Note that unlike SFTP, FTP only supports one transfer operation at a time. An ongoing operation should be completed or aborted before a new one can be started.

### Closing the connection

 Use [disconnect](#disconnect-method-ftpclient-struct) to close the FTP connection.

### Useful info

 During its work FTPClient communicates back via events. [on_progress](#on_progress-event-ftpclient-struct) event fires periodically during the transfer operation to let you know of the operation progress. [on_control_send](#on_control_send-event-ftpclient-struct) and [on_control_receive](#on_control_receive-event-ftpclient-struct) report the protocol communication log. [on_file_operation](#on_file_operation-event-ftpclient-struct) and [on_file_operation_result](#on_file_operation_result-event-ftpclient-struct) report the start and completion of an individual transfer operation within a multi-file transfer call (such as [upload_files](#upload_files-method-ftpclient-struct)).

### Object Lifetime

 The *new()* method returns a mutable reference to a struct instance. The object itself is kept in the global list maintained by SecureBlackbox. Due to this, the FTPClient struct cannot be disposed of automatically. Please, call the *dispose(&mut; self)* method of FTPClient when you have finished using the instance.

## Property List

*The following is the full list of the properties of the struct with short descriptions. Click on the links for further details.*

|  |  |
| --- | --- |
| [account_info](#account_info-property-ftpclient-struct) | Parameters for the ACCT command. |
| [adjust_pasv_address](#adjust_pasv_address-property-ftpclient-struct) | Enables or disables automatic adjustment of passive-mode addresses. |
| [blocked_cert_count](#blocked_cert_count-property-ftpclient-struct) | The number of records in the BlockedCert arrays. |
| [blocked_cert_bytes](#blocked_cert_bytes-property-ftpclient-struct) | Returns the raw certificate data in DER format. |
| [blocked_cert_handle](#blocked_cert_handle-property-ftpclient-struct) | Allows to get or set a 'handle', a unique identifier of the underlying property object. |
| [conflict_resolution_mode](#conflict_resolution_mode-property-ftpclient-struct) | Defines the approach that should be used to resolve various conflicts during batch processing. |
| [connected](#connected-property-ftpclient-struct) | Indicates whether the struct is connected to the server. |
| [control_channel_log](#control_channel_log-property-ftpclient-struct) | Contains the control channel log of the FTP session. |
| [ctl_conn_info_aead_cipher](#ctl_conn_info_aead_cipher-property-ftpclient-struct) | Indicates whether the encryption algorithm used is an AEAD cipher. |
| [ctl_conn_info_chain_validation_details](#ctl_conn_info_chain_validation_details-property-ftpclient-struct) | The details of a certificate chain validation outcome. |
| [ctl_conn_info_chain_validation_result](#ctl_conn_info_chain_validation_result-property-ftpclient-struct) | The outcome of a certificate chain validation routine. |
| [ctl_conn_info_ciphersuite](#ctl_conn_info_ciphersuite-property-ftpclient-struct) | The cipher suite employed by this connection. |
| [ctl_conn_info_client_authenticated](#ctl_conn_info_client_authenticated-property-ftpclient-struct) | Specifies whether client authentication was performed during this connection. |
| [ctl_conn_info_client_auth_requested](#ctl_conn_info_client_auth_requested-property-ftpclient-struct) | Specifies whether client authentication was requested during this connection. |
| [ctl_conn_info_connection_established](#ctl_conn_info_connection_established-property-ftpclient-struct) | Indicates whether the connection has been established fully. |
| [ctl_conn_info_connection_id](#ctl_conn_info_connection_id-property-ftpclient-struct) | The unique identifier assigned to this connection. |
| [ctl_conn_info_digest_algorithm](#ctl_conn_info_digest_algorithm-property-ftpclient-struct) | The digest algorithm used in a TLS-enabled connection. |
| [ctl_conn_info_encryption_algorithm](#ctl_conn_info_encryption_algorithm-property-ftpclient-struct) | The symmetric encryption algorithm used in a TLS-enabled connection. |
| [ctl_conn_info_exportable](#ctl_conn_info_exportable-property-ftpclient-struct) | Indicates whether a TLS connection uses a reduced-strength exportable cipher. |
| [ctl_conn_info_group](#ctl_conn_info_group-property-ftpclient-struct) | The elliptic curve used in this connection. |
| [ctl_conn_info_id](#ctl_conn_info_id-property-ftpclient-struct) | The client connection's unique identifier. |
| [ctl_conn_info_key_exchange_algorithm](#ctl_conn_info_key_exchange_algorithm-property-ftpclient-struct) | The key exchange algorithm used in a TLS-enabled connection. |
| [ctl_conn_info_key_exchange_key_bits](#ctl_conn_info_key_exchange_key_bits-property-ftpclient-struct) | The length of the key exchange key of a TLS-enabled connection. |
| [ctl_conn_info_pfs_cipher](#ctl_conn_info_pfs_cipher-property-ftpclient-struct) | Indicates whether the chosen ciphersuite provides perfect forward secrecy (PFS). |
| [ctl_conn_info_pre_shared_identity](#ctl_conn_info_pre_shared_identity-property-ftpclient-struct) | Specifies the identity used when the PSK (Pre-Shared Key) key-exchange mechanism is negotiated. |
| [ctl_conn_info_pre_shared_identity_hint](#ctl_conn_info_pre_shared_identity_hint-property-ftpclient-struct) | A hint professed by the server to help the client select the PSK identity to use. |
| [ctl_conn_info_public_key_bits](#ctl_conn_info_public_key_bits-property-ftpclient-struct) | The length of the public key. |
| [ctl_conn_info_remote_address](#ctl_conn_info_remote_address-property-ftpclient-struct) | The client's IP address. |
| [ctl_conn_info_remote_port](#ctl_conn_info_remote_port-property-ftpclient-struct) | The remote port of the client connection. |
| [ctl_conn_info_resumed_session](#ctl_conn_info_resumed_session-property-ftpclient-struct) | Indicates whether a TLS-enabled connection was spawned from another TLS connection. |
| [ctl_conn_info_secure_connection](#ctl_conn_info_secure_connection-property-ftpclient-struct) | Indicates whether TLS or SSL is enabled for this connection. |
| [ctl_conn_info_server_authenticated](#ctl_conn_info_server_authenticated-property-ftpclient-struct) | Indicates whether server authentication was performed during a TLS-enabled connection. |
| [ctl_conn_info_signature_algorithm](#ctl_conn_info_signature_algorithm-property-ftpclient-struct) | The signature algorithm used in a TLS handshake. |
| [ctl_conn_info_symmetric_block_size](#ctl_conn_info_symmetric_block_size-property-ftpclient-struct) | The block size of the symmetric algorithm used. |
| [ctl_conn_info_symmetric_key_bits](#ctl_conn_info_symmetric_key_bits-property-ftpclient-struct) | The key length of the symmetric algorithm used. |
| [ctl_conn_info_total_bytes_received](#ctl_conn_info_total_bytes_received-property-ftpclient-struct) | The total number of bytes received over this connection. |
| [ctl_conn_info_total_bytes_sent](#ctl_conn_info_total_bytes_sent-property-ftpclient-struct) | The total number of bytes sent over this connection. |
| [ctl_conn_info_validation_log](#ctl_conn_info_validation_log-property-ftpclient-struct) | Contains the server certificate's chain validation log. |
| [ctl_conn_info_version](#ctl_conn_info_version-property-ftpclient-struct) | Indicates the version of SSL/TLS protocol negotiated during this connection. |
| [curr_list_entry_access_time](#curr_list_entry_access_time-property-ftpclient-struct) | Contains the last access time for this file, in UTC. |
| [curr_list_entry_creation_time](#curr_list_entry_creation_time-property-ftpclient-struct) | Contains this file's creation time, in UTC. |
| [curr_list_entry_entry_format](#curr_list_entry_entry_format-property-ftpclient-struct) | The file listing format: cfefUnknown 0 cfefUnix 1 cfefWindows 2 cfefMLSD 3 . |
| [curr_list_entry_file_type](#curr_list_entry_file_type-property-ftpclient-struct) | The type of the entry: fetUnknown 0 fetDirectory 1 fetFile 2 fetSymlink 3 fetSpecial 4 fetCurrentDirectory 5 fetParentDirectory 6 fetSocket 7 fetCharDevice 8 fetBlockDevice 9 fetFIFO 10 . |
| [curr_list_entry_handle](#curr_list_entry_handle-property-ftpclient-struct) | Allows to get or set a 'handle', a unique identifier of the underlying property object. |
| [curr_list_entry_modification_time](#curr_list_entry_modification_time-property-ftpclient-struct) | File last modification date/time. |
| [curr_list_entry_name](#curr_list_entry_name-property-ftpclient-struct) | The file or directory name. |
| [curr_list_entry_path](#curr_list_entry_path-property-ftpclient-struct) | The full path to the file or directory. |
| [curr_list_entry_principal](#curr_list_entry_principal-property-ftpclient-struct) | Specifies the owner of the file/directory. |
| [curr_list_entry_size](#curr_list_entry_size-property-ftpclient-struct) | File size in bytes. |
| [curr_list_entry_unix_perms](#curr_list_entry_unix_perms-property-ftpclient-struct) | The file Unix permissions bit mask (e. |
| [curr_list_entry_unparsed_name](#curr_list_entry_unparsed_name-property-ftpclient-struct) | The unparsed entry as returned by the server. |
| [data_conn_info_aead_cipher](#data_conn_info_aead_cipher-property-ftpclient-struct) | Indicates whether the encryption algorithm used is an AEAD cipher. |
| [data_conn_info_chain_validation_details](#data_conn_info_chain_validation_details-property-ftpclient-struct) | The details of a certificate chain validation outcome. |
| [data_conn_info_chain_validation_result](#data_conn_info_chain_validation_result-property-ftpclient-struct) | The outcome of a certificate chain validation routine. |
| [data_conn_info_ciphersuite](#data_conn_info_ciphersuite-property-ftpclient-struct) | The cipher suite employed by this connection. |
| [data_conn_info_client_authenticated](#data_conn_info_client_authenticated-property-ftpclient-struct) | Specifies whether client authentication was performed during this connection. |
| [data_conn_info_client_auth_requested](#data_conn_info_client_auth_requested-property-ftpclient-struct) | Specifies whether client authentication was requested during this connection. |
| [data_conn_info_connection_established](#data_conn_info_connection_established-property-ftpclient-struct) | Indicates whether the connection has been established fully. |
| [data_conn_info_connection_id](#data_conn_info_connection_id-property-ftpclient-struct) | The unique identifier assigned to this connection. |
| [data_conn_info_digest_algorithm](#data_conn_info_digest_algorithm-property-ftpclient-struct) | The digest algorithm used in a TLS-enabled connection. |
| [data_conn_info_encryption_algorithm](#data_conn_info_encryption_algorithm-property-ftpclient-struct) | The symmetric encryption algorithm used in a TLS-enabled connection. |
| [data_conn_info_exportable](#data_conn_info_exportable-property-ftpclient-struct) | Indicates whether a TLS connection uses a reduced-strength exportable cipher. |
| [data_conn_info_group](#data_conn_info_group-property-ftpclient-struct) | The elliptic curve used in this connection. |
| [data_conn_info_id](#data_conn_info_id-property-ftpclient-struct) | The client connection's unique identifier. |
| [data_conn_info_key_exchange_algorithm](#data_conn_info_key_exchange_algorithm-property-ftpclient-struct) | The key exchange algorithm used in a TLS-enabled connection. |
| [data_conn_info_key_exchange_key_bits](#data_conn_info_key_exchange_key_bits-property-ftpclient-struct) | The length of the key exchange key of a TLS-enabled connection. |
| [data_conn_info_pfs_cipher](#data_conn_info_pfs_cipher-property-ftpclient-struct) | Indicates whether the chosen ciphersuite provides perfect forward secrecy (PFS). |
| [data_conn_info_pre_shared_identity](#data_conn_info_pre_shared_identity-property-ftpclient-struct) | Specifies the identity used when the PSK (Pre-Shared Key) key-exchange mechanism is negotiated. |
| [data_conn_info_pre_shared_identity_hint](#data_conn_info_pre_shared_identity_hint-property-ftpclient-struct) | A hint professed by the server to help the client select the PSK identity to use. |
| [data_conn_info_public_key_bits](#data_conn_info_public_key_bits-property-ftpclient-struct) | The length of the public key. |
| [data_conn_info_remote_address](#data_conn_info_remote_address-property-ftpclient-struct) | The client's IP address. |
| [data_conn_info_remote_port](#data_conn_info_remote_port-property-ftpclient-struct) | The remote port of the client connection. |
| [data_conn_info_resumed_session](#data_conn_info_resumed_session-property-ftpclient-struct) | Indicates whether a TLS-enabled connection was spawned from another TLS connection. |
| [data_conn_info_secure_connection](#data_conn_info_secure_connection-property-ftpclient-struct) | Indicates whether TLS or SSL is enabled for this connection. |
| [data_conn_info_server_authenticated](#data_conn_info_server_authenticated-property-ftpclient-struct) | Indicates whether server authentication was performed during a TLS-enabled connection. |
| [data_conn_info_signature_algorithm](#data_conn_info_signature_algorithm-property-ftpclient-struct) | The signature algorithm used in a TLS handshake. |
| [data_conn_info_symmetric_block_size](#data_conn_info_symmetric_block_size-property-ftpclient-struct) | The block size of the symmetric algorithm used. |
| [data_conn_info_symmetric_key_bits](#data_conn_info_symmetric_key_bits-property-ftpclient-struct) | The key length of the symmetric algorithm used. |
| [data_conn_info_total_bytes_received](#data_conn_info_total_bytes_received-property-ftpclient-struct) | The total number of bytes received over this connection. |
| [data_conn_info_total_bytes_sent](#data_conn_info_total_bytes_sent-property-ftpclient-struct) | The total number of bytes sent over this connection. |
| [data_conn_info_validation_log](#data_conn_info_validation_log-property-ftpclient-struct) | Contains the server certificate's chain validation log. |
| [data_conn_info_version](#data_conn_info_version-property-ftpclient-struct) | Indicates the version of SSL/TLS protocol negotiated during this connection. |
| [encrypt_data_channel](#encrypt_data_channel-property-ftpclient-struct) | Enables or disables data channel encryption. |
| [external_crypto_async_document_id](#external_crypto_async_document_id-property-ftpclient-struct) | Specifies an optional document ID for SignAsyncBegin() and SignAsyncEnd() calls. |
| [external_crypto_custom_params](#external_crypto_custom_params-property-ftpclient-struct) | Custom parameters to be passed to the signing service (uninterpreted). |
| [external_crypto_data](#external_crypto_data-property-ftpclient-struct) | Additional data to be included in the async state and mirrored back by the requestor. |
| [external_crypto_external_hash_calculation](#external_crypto_external_hash_calculation-property-ftpclient-struct) | Specifies whether the message hash is to be calculated at the external endpoint. |
| [external_crypto_hash_algorithm](#external_crypto_hash_algorithm-property-ftpclient-struct) | Specifies the request's signature hash algorithm. |
| [external_crypto_key_id](#external_crypto_key_id-property-ftpclient-struct) | The ID of the pre-shared key used for DC request authentication. |
| [external_crypto_key_secret](#external_crypto_key_secret-property-ftpclient-struct) | The pre-shared key used for DC request authentication. |
| [external_crypto_method](#external_crypto_method-property-ftpclient-struct) | Specifies the asynchronous signing method. |
| [external_crypto_mode](#external_crypto_mode-property-ftpclient-struct) | Specifies the external cryptography mode. |
| [external_crypto_public_key_algorithm](#external_crypto_public_key_algorithm-property-ftpclient-struct) | Provide the public key algorithm here if the certificate is not available on the pre-signing stage. |
| [fips_mode](#fips_mode-property-ftpclient-struct) | Reserved. |
| [known_cert_count](#known_cert_count-property-ftpclient-struct) | The number of records in the KnownCert arrays. |
| [known_cert_bytes](#known_cert_bytes-property-ftpclient-struct) | Returns the raw certificate data in DER format. |
| [known_cert_handle](#known_cert_handle-property-ftpclient-struct) | Allows to get or set a 'handle', a unique identifier of the underlying property object. |
| [known_crl_count](#known_crl_count-property-ftpclient-struct) | The number of records in the KnownCRL arrays. |
| [known_crl_bytes](#known_crl_bytes-property-ftpclient-struct) | Returns the raw CRL data in DER format. |
| [known_crl_handle](#known_crl_handle-property-ftpclient-struct) | Allows to get or set a 'handle', a unique identifier of the underlying property object. |
| [known_ocsp_count](#known_ocsp_count-property-ftpclient-struct) | The number of records in the KnownOCSP arrays. |
| [known_ocsp_bytes](#known_ocsp_bytes-property-ftpclient-struct) | A buffer containing the raw OCSP response data. |
| [known_ocsp_handle](#known_ocsp_handle-property-ftpclient-struct) | Allows to get or set a 'handle', a unique identifier of the underlying property object. |
| [mode_z](#mode_z-property-ftpclient-struct) | Switches on data compression. |
| [passive_mode](#passive_mode-property-ftpclient-struct) | Enables or disables passive transfer mode. |
| [password](#password-property-ftpclient-struct) | The connecting user's authentication password. |
| [proxy_address](#proxy_address-property-ftpclient-struct) | The IP address of the proxy server. |
| [proxy_authentication](#proxy_authentication-property-ftpclient-struct) | The authentication type used by the proxy server. |
| [proxy_password](#proxy_password-property-ftpclient-struct) | The password to authenticate to the proxy server. |
| [proxy_port](#proxy_port-property-ftpclient-struct) | The port on the proxy server to connect to. |
| [proxy_type](#proxy_type-property-ftpclient-struct) | The type of the proxy server. |
| [proxy_request_headers](#proxy_request_headers-property-ftpclient-struct) | Contains HTTP request headers for WebTunnel and HTTP proxy. |
| [proxy_response_body](#proxy_response_body-property-ftpclient-struct) | Contains the HTTP or HTTPS (WebTunnel) proxy response body. |
| [proxy_response_headers](#proxy_response_headers-property-ftpclient-struct) | Contains response headers received from an HTTP or HTTPS (WebTunnel) proxy server. |
| [proxy_use_ipv6](#proxy_use_ipv6-property-ftpclient-struct) | Specifies whether IPv6 should be used when connecting through the proxy. |
| [proxy_username](#proxy_username-property-ftpclient-struct) | Specifies the username credential for proxy authentication. |
| [restart_at](#restart_at-property-ftpclient-struct) | The offset to restart the file transfer from. |
| [socket_dns_mode](#socket_dns_mode-property-ftpclient-struct) | Selects the DNS resolver to use: the struct's (secure) built-in one, or the one provided by the system. |
| [socket_dns_port](#socket_dns_port-property-ftpclient-struct) | Specifies the port number to be used for sending queries to the DNS server. |
| [socket_dns_query_timeout](#socket_dns_query_timeout-property-ftpclient-struct) | The timeout (in milliseconds) for each DNS query. |
| [socket_dns_servers](#socket_dns_servers-property-ftpclient-struct) | The addresses of DNS servers to use for address resolution, separated by commas or semicolons. |
| [socket_dns_total_timeout](#socket_dns_total_timeout-property-ftpclient-struct) | The timeout (in milliseconds) for the whole resolution process. |
| [socket_incoming_speed_limit](#socket_incoming_speed_limit-property-ftpclient-struct) | The maximum number of bytes to read from the socket, per second. |
| [socket_local_address](#socket_local_address-property-ftpclient-struct) | The local network interface to bind the socket to. |
| [socket_local_port](#socket_local_port-property-ftpclient-struct) | The local port number to bind the socket to. |
| [socket_outgoing_speed_limit](#socket_outgoing_speed_limit-property-ftpclient-struct) | The maximum number of bytes to write to the socket, per second. |
| [socket_timeout](#socket_timeout-property-ftpclient-struct) | The maximum period of waiting, in milliseconds, after which the socket operation is considered unsuccessful. |
| [socket_use_ipv6](#socket_use_ipv6-property-ftpclient-struct) | Enables or disables IP protocol version 6. |
| [tls_client_cert_count](#tls_client_cert_count-property-ftpclient-struct) | The number of records in the TLSClientCert arrays. |
| [tls_client_cert_bytes](#tls_client_cert_bytes-property-ftpclient-struct) | Returns the raw certificate data in DER format. |
| [tls_client_cert_handle](#tls_client_cert_handle-property-ftpclient-struct) | Allows to get or set a 'handle', a unique identifier of the underlying property object. |
| [tls_server_cert_count](#tls_server_cert_count-property-ftpclient-struct) | The number of records in the TLSServerCert arrays. |
| [tls_server_cert_bytes](#tls_server_cert_bytes-property-ftpclient-struct) | Returns the raw certificate data in DER format. |
| [tls_server_cert_fingerprint](#tls_server_cert_fingerprint-property-ftpclient-struct) | Contains the fingerprint (a hash imprint) of this certificate. |
| [tls_server_cert_handle](#tls_server_cert_handle-property-ftpclient-struct) | Allows to get or set a 'handle', a unique identifier of the underlying property object. |
| [tls_server_cert_issuer](#tls_server_cert_issuer-property-ftpclient-struct) | The common name of the certificate issuer (CA), typically a company name. |
| [tls_server_cert_issuer_rdn](#tls_server_cert_issuer_rdn-property-ftpclient-struct) | A list of Property=Value pairs that uniquely identify the certificate issuer. |
| [tls_server_cert_key_algorithm](#tls_server_cert_key_algorithm-property-ftpclient-struct) | Specifies the public key algorithm of this certificate. |
| [tls_server_cert_key_bits](#tls_server_cert_key_bits-property-ftpclient-struct) | Returns the length of the public key in bits. |
| [tls_server_cert_key_usage](#tls_server_cert_key_usage-property-ftpclient-struct) | Indicates the purposes of the key contained in the certificate, in the form of an OR'ed flag set. |
| [tls_server_cert_self_signed](#tls_server_cert_self_signed-property-ftpclient-struct) | Indicates whether the certificate is self-signed (root) or signed by an external CA. |
| [tls_server_cert_serial_number](#tls_server_cert_serial_number-property-ftpclient-struct) | Returns the certificate's serial number. |
| [tls_server_cert_sig_algorithm](#tls_server_cert_sig_algorithm-property-ftpclient-struct) | Indicates the algorithm that was used by the CA to sign this certificate. |
| [tls_server_cert_subject](#tls_server_cert_subject-property-ftpclient-struct) | The common name of the certificate holder, typically an individual's name, a URL, an e-mail address, or a company name. |
| [tls_server_cert_subject_rdn](#tls_server_cert_subject_rdn-property-ftpclient-struct) | A list of Property=Value pairs that uniquely identify the certificate holder (subject). |
| [tls_server_cert_valid_from](#tls_server_cert_valid_from-property-ftpclient-struct) | The time point at which the certificate becomes valid, in UTC. |
| [tls_server_cert_valid_to](#tls_server_cert_valid_to-property-ftpclient-struct) | The time point at which the certificate expires, in UTC. |
| [tls_auto_validate_certificates](#tls_auto_validate_certificates-property-ftpclient-struct) | Specifies whether server-side TLS certificates should be validated automatically using internal validation rules. |
| [tls_base_configuration](#tls_base_configuration-property-ftpclient-struct) | Selects the base configuration for the TLS settings. |
| [tls_ciphersuites](#tls_ciphersuites-property-ftpclient-struct) | A list of ciphersuites separated with commas or semicolons. |
| [tls_client_auth](#tls_client_auth-property-ftpclient-struct) | Enables or disables certificate-based client authentication. |
| [tls_extensions](#tls_extensions-property-ftpclient-struct) | Provides access to TLS extensions. |
| [tls_force_resume_if_destination_changes](#tls_force_resume_if_destination_changes-property-ftpclient-struct) | Whether to force TLS session resumption when the destination address changes. |
| [tls_groups](#tls_groups-property-ftpclient-struct) | Specifies a list of key exchange groups to attempt during the TLS key exchange. |
| [tls_pre_shared_identity](#tls_pre_shared_identity-property-ftpclient-struct) | Defines the identity used when the PSK (Pre-Shared Key) key-exchange mechanism is negotiated. |
| [tls_pre_shared_key](#tls_pre_shared_key-property-ftpclient-struct) | Contains the pre-shared key for the PSK (Pre-Shared Key) key-exchange mechanism, encoded with base16. |
| [tls_pre_shared_key_ciphersuite](#tls_pre_shared_key_ciphersuite-property-ftpclient-struct) | Defines the ciphersuite used for PSK (Pre-Shared Key) negotiation. |
| [tls_renegotiation_attack_prevention_mode](#tls_renegotiation_attack_prevention_mode-property-ftpclient-struct) | Selects the renegotiation attack prevention mechanism. |
| [tls_revocation_check](#tls_revocation_check-property-ftpclient-struct) | Specifies the kind(s) of revocation check to perform. |
| [tls_ssl_options](#tls_ssl_options-property-ftpclient-struct) | Various SSL (TLS) protocol options, set of cssloExpectShutdownMessage 0x001 Wait for the close-notify message when shutting down the connection cssloOpenSSLDTLSWorkaround 0x002 (DEPRECATED) Use a DTLS version workaround when talking to very old OpenSSL versions cssloDisableKexLengthAlignment 0x004 Do not align the client-side PMS by the RSA modulus size. |
| [tls_mode](#tls_mode-property-ftpclient-struct) | Specifies the TLS mode to use. |
| [tls_use_extended_master_secret](#tls_use_extended_master_secret-property-ftpclient-struct) | Enables the Extended Master Secret Extension, as defined in RFC 7627. |
| [tls_use_session_resumption](#tls_use_session_resumption-property-ftpclient-struct) | Enables or disables the TLS session resumption capability. |
| [tls_versions](#tls_versions-property-ftpclient-struct) | The SSL/TLS versions to enable by default. |
| [transfer_type](#transfer_type-property-ftpclient-struct) | Sets the file transfer mode. |
| [trusted_cert_count](#trusted_cert_count-property-ftpclient-struct) | The number of records in the TrustedCert arrays. |
| [trusted_cert_bytes](#trusted_cert_bytes-property-ftpclient-struct) | Returns the raw certificate data in DER format. |
| [trusted_cert_handle](#trusted_cert_handle-property-ftpclient-struct) | Allows to get or set a 'handle', a unique identifier of the underlying property object. |
| [username](#username-property-ftpclient-struct) | The connecting user's username (login name). |

## Method List

*The following is the full list of the methods of the struct with short descriptions. Click on the links for further details.*

|  |  |
| --- | --- |
| [abort](#abort-method-ftpclient-struct) | Aborts the previous FTP service command and any associated transfer of data. |
| [acct](#acct-method-ftpclient-struct) | Sends an Account command. |
| [append_bytes](#append_bytes-method-ftpclient-struct) | Appends a byte array to a server-side file. |
| [append_file](#append_file-method-ftpclient-struct) | Uploads a file to the server. |
| [change_dir](#change_dir-method-ftpclient-struct) | Changes the current directory. |
| [clear_command_channel](#clear_command_channel-method-ftpclient-struct) | Sends CCC (Clear Command Channel) command to the server. |
| [config](#config-method-ftpclient-struct) | Sets or retrieves a configuration setting. |
| [connect](#connect-method-ftpclient-struct) | Connects to the FTP server. |
| [delete_dir](#delete_dir-method-ftpclient-struct) | Deletes a directory on the server. |
| [delete_file](#delete_file-method-ftpclient-struct) | Deletes a file on the server. |
| [dir_exists](#dir_exists-method-ftpclient-struct) | Checks if a directory exists on the server. |
| [disconnect](#disconnect-method-ftpclient-struct) | Disconnects from the server. |
| [do_action](#do_action-method-ftpclient-struct) | Performs an additional action. |
| [download_bytes](#download_bytes-method-ftpclient-struct) | Downloads a file from the server into an array of bytes. |
| [download_file](#download_file-method-ftpclient-struct) | Downloads a file from the server. |
| [download_files](#download_files-method-ftpclient-struct) | Downloads multiple files from the server. |
| [file_exists](#file_exists-method-ftpclient-struct) | Checks if a file exists on the server. |
| [get_current_dir](#get_current_dir-method-ftpclient-struct) | Returns the server-side current directory. |
| [get_file_size](#get_file_size-method-ftpclient-struct) | Returns the size of a remote file. |
| [list_dir](#list_dir-method-ftpclient-struct) | Lists the contents of a remote directory. |
| [make_dir](#make_dir-method-ftpclient-struct) | Creates a new directory on the server. |
| [noop](#noop-method-ftpclient-struct) | Sends a NOOP command to the server. |
| [rename](#rename-method-ftpclient-struct) | Renames a file. |
| [reset](#reset-method-ftpclient-struct) | Resets the struct settings. |
| [send_command](#send_command-method-ftpclient-struct) | Sends a custom command to the server. |
| [upload_bytes](#upload_bytes-method-ftpclient-struct) | Uploads a byte array to the server. |
| [upload_file](#upload_file-method-ftpclient-struct) | Uploads a file to the server. |
| [upload_files](#upload_files-method-ftpclient-struct) | Uploads multiple files to the server. |

## Event List

*The following is the full list of the events fired by the struct with short descriptions. Click on the links for further details.*

|  |  |
| --- | --- |
| [on_control_receive](#on_control_receive-event-ftpclient-struct) | Fires when data is received via the control channel. |
| [on_control_send](#on_control_send-event-ftpclient-struct) | Fires when data is about to be set via the control channel. |
| [on_error](#on_error-event-ftpclient-struct) | Information about errors during data delivery. |
| [on_external_sign](#on_external_sign-event-ftpclient-struct) | Handles remote or external signing initiated by the SignExternal method or other source. |
| [on_file_name_change_needed](#on_file_name_change_needed-event-ftpclient-struct) | Asks the application for a new file name. |
| [on_file_operation](#on_file_operation-event-ftpclient-struct) | Marks the start of a file transfer. |
| [on_file_operation_result](#on_file_operation_result-event-ftpclient-struct) | Reports the result of a file transfer operation. |
| [on_list_entry](#on_list_entry-event-ftpclient-struct) | Reports a single entry from the requested directory listing. |
| [on_notification](#on_notification-event-ftpclient-struct) | This event notifies the application about an underlying control flow event. |
| [on_progress](#on_progress-event-ftpclient-struct) | Reports the data transfer progress. |
| [on_text_data_line](#on_text_data_line-event-ftpclient-struct) | Reports next transferred data line. |
| [on_tls_cert_needed](#on_tls_cert_needed-event-ftpclient-struct) | Fires when a remote TLS party requests a client certificate. |
| [on_tls_cert_validate](#on_tls_cert_validate-event-ftpclient-struct) | This event is fired upon receipt of the TLS server's certificate, allowing the user to control its acceptance. |
| [on_tls_established](#on_tls_established-event-ftpclient-struct) | Fires when a TLS handshake with Host successfully completes. |
| [on_tls_handshake](#on_tls_handshake-event-ftpclient-struct) | Fires when a new TLS handshake is initiated, before the handshake commences. |
| [on_tls_psk](#on_tls_psk-event-ftpclient-struct) | Notifies the application about the PSK key exchange. |
| [on_tls_shutdown](#on_tls_shutdown-event-ftpclient-struct) | Reports the graceful closure of a TLS connection. |

## Config Settings

*The following is a list of config settings for the struct with short descriptions. Click on the links for further details.*

|  |  |
| --- | --- |
| [AccountInfo](#AccountInfo) | Provides the value to be used with ACCT command. |
| [AuthCmd](#AuthCmd) | Authorization command to be used to request an explicit SSL session. |
| [CachedCRLMaxAge](#CachedCRLMaxAge) | Specifies the maximum age of a cached CRL. |
| [CachedCRLMaxAgeRatio](#CachedCRLMaxAgeRatio) | Specifies the maximum age of a cached CRL as a percentage of its remaining lifetime. |
| [CachedCRLOverlapTime](#CachedCRLOverlapTime) | Specifies the time period before a cached CRL's NextUpdate when it is considered stale and must be refreshed. |
| [CachedOCSPResponseMaxAge](#CachedOCSPResponseMaxAge) | Specifies the maximum age of a cached OCSP response. |
| [CachedOCSPResponseMaxAgeRatio](#CachedOCSPResponseMaxAgeRatio) | Specifies the maximum age of a cached OCSP response as a percentage of its remaining lifetime. |
| [CachedOCSPResponseOverlapTime](#CachedOCSPResponseOverlapTime) | Specifies the time period before a cached OCSP response's NextUpdate when it is considered stale and must be refreshed. |
| [CaseConversion](#CaseConversion) | Whether file names and paths should be case-converted. |
| [CaseSensitive](#CaseSensitive) | Specifies if file paths are case-sensitive. |
| [CloseQuietly](#CloseQuietly) | Set this to true to avoid sending QUIT command on session closure. |
| [ConcurrentConnections](#ConcurrentConnections) | Number of simultaneous connections for download. |
| [ControlChannelLog](#ControlChannelLog) | Returns the control channel connection log. |
| [CopyMode](#CopyMode) | Tunes up the post-transfer action for batch uploads. |
| [DataPort](#DataPort) | Sets a specific listening port for active mode data connection. |
| [DataPortRangeFilter](#DataPortRangeFilter) | Provides a flexible mechanism to set multiple active mode data port ranges. |
| [DataPortRangeFrom](#DataPortRangeFrom) | Sets the lower boundary for Active mode data port range. |
| [DataPortRangeTo](#DataPortRangeTo) | Sets the upper boundary for Active mode data port range. |
| [DeltaCRLPreference](#DeltaCRLPreference) | Specifies whether complete or delta CRLs are preferred. |
| [ErrorOrigin](#ErrorOrigin) | Specifies whether the error is local or remote. |
| [ErrorSeverity](#ErrorSeverity) | Specifies whether the error is fatal. |
| [EvaluateSystemTrust](#EvaluateSystemTrust) | Enables or disables usage of the platform's built-in trust validation facilities. |
| [EventOrigin](#EventOrigin) | Indicates the channel that has fired the event. |
| [ExtHOSTSupported](#ExtHOSTSupported) | Whether HOST extension is supported. |
| [ExtMDTMSupported](#ExtMDTMSupported) | Whether MDTM extension is supported. |
| [ExtMFMTSupported](#ExtMFMTSupported) | Whether MFMT extension is supported. |
| [ExtMLSTSupported](#ExtMLSTSupported) | Whether MLST extension is supported. |
| [ExtOPTSUTF8Supported](#ExtOPTSUTF8Supported) | Whether OPTS UTF8 extension is supported. |
| [ExtRESTSupported](#ExtRESTSupported) | Whether REST extension is supported. |
| [ExtSIZESupported](#ExtSIZESupported) | Whether SIZE extension is supported. |
| [ExtXCRCSupported](#ExtXCRCSupported) | Whether XCRC extension is supported. |
| [ExtXMD5Supported](#ExtXMD5Supported) | Whether XMD5 extension is supported. |
| [ExtXSHA1Supported](#ExtXSHA1Supported) | TBD. |
| [FTPBufferSize](#FTPBufferSize) | Buffer size in binary mode. |
| [FTPTextBufferSize](#FTPTextBufferSize) | Buffer size in text mode. |
| [IgnoreSystemTrust](#IgnoreSystemTrust) | Whether trusted Windows Certificate Stores should be treated as trusted. |
| [ListenTimeout](#ListenTimeout) | Listening socket timeout. |
| [LocalNewLineConvention](#LocalNewLineConvention) | A character string for the end of line (EOL) indication on the local machine. |
| [LocalNewLineConvention](#LocalNewLineConvention) | Defines the local newline convention. |
| [MinSizeForConcurrentDownload](#MinSizeForConcurrentDownload) | Files bigger than this size will be downloaded concurrently. |
| [ModeZ](#ModeZ) | Enables or disables data compression. |
| [Options](#Options) | Various FTP options. |
| [RevocationCacheAgePolicy](#RevocationCacheAgePolicy) | Specifies a preset policy for cached CRL and OCSP response freshness settings. |
| [StaticDNS](#StaticDNS) | Specifies whether static DNS rules should be used. |
| [StaticIPAddress\[domain\]](#StaticIPAddress[domain]) | Gets or sets an IP address for the specified domain name. |
| [StaticIPAddresses](#StaticIPAddresses) | Gets or sets all the static DNS rules. |
| [TempPath](#TempPath) | Path for storing temporary files. |
| [TLSCiphersuites](#TLSCiphersuites) | Returns the list of ciphersuites activated in the struct for the current session. |
| [TLSExtensions](#TLSExtensions) | TBD. |
| [TLSGroups](#TLSGroups) | Returns the list of TLS key exchange groups enabled in the struct. |
| [TLSLayerKeepAlives](#TLSLayerKeepAlives) | Enables or disables keep alive signals on the TLS layer. |
| [TLSPeerExtensions](#TLSPeerExtensions) | TBD. |
| [TLSSessionGroup](#TLSSessionGroup) | Specifies the group name of TLS sessions to be used for session resumption. |
| [TLSSessionLifetime](#TLSSessionLifetime) | Specifies lifetime in seconds of the cached TLS session. |
| [TLSSessionPurgeInterval](#TLSSessionPurgeInterval) | Specifies how often the session cache should remove the expired TLS sessions. |
| [TLSVersions](#TLSVersions) | Returns the list of TLS versions enabled in the struct. |
| [TolerateMinorChainIssues](#TolerateMinorChainIssues) | Whether to tolerate minor chain issues. |
| [TransferKeepAliveInterval](#TransferKeepAliveInterval) | Keep-alive interval for the data channel transfers. |
| [TransferTimeout](#TransferTimeout) | Timeout for data transfer in active mode. |
| [UseEnvStorages](#UseEnvStorages) | Enables or disables use of the environment storages. |
| [UseMicrosoftCTL](#UseMicrosoftCTL) | Enables or disables the automatic use of the Microsoft online certificate trust list. |
| [UseProxySettingsForDataChannel](#UseProxySettingsForDataChannel) | Whether the proxy settings should be applied to data channel. |
| [UseSystemCertificates](#UseSystemCertificates) | Enables or disables the use of the system certificates. |
| [UseUTF8IfAvailable](#UseUTF8IfAvailable) | Upgrade to UTF8 string encoding if the server supports it. |
| [ASN1UseGlobalTagCache](#ASN1UseGlobalTagCache) | Controls whether ASN.1 module should use a global object cache. |
| [AssignSystemSmartCardPins](#AssignSystemSmartCardPins) | Specifies whether CSP-level PINs should be assigned to CNG keys. |
| [CheckKeyIntegrityBeforeUse](#CheckKeyIntegrityBeforeUse) | Enables or disable private key integrity check before use. |
| [CookieCaching](#CookieCaching) | Specifies whether a cookie cache should be used for HTTP(S) transports. |
| [Cookies](#Cookies) | Gets or sets local cookies for the struct. |
| [DefDeriveKeyIterations](#DefDeriveKeyIterations) | Specifies the default key derivation algorithm iteration count. |
| [DNSLocalSuffix](#DNSLocalSuffix) | The suffix to assign for TLD names. |
| [EnableClientSideSSLFFDHE](#EnableClientSideSSLFFDHE) | Enables or disables finite field DHE key exchange support in TLS clients. |
| [EnableSSHMLKEM](#EnableSSHMLKEM) | Enables support for ML-KEM/hybrid key exchange algorithms in SSH client and server structs. |
| [EnableTLSMLKEM](#EnableTLSMLKEM) | Enables support for ML-KEM and hybrid groups in TLS client and server structs. |
| [GlobalCookies](#GlobalCookies) | Gets or sets global cookies for all the HTTP transports. |
| [HardwareCryptoUsePolicy](#HardwareCryptoUsePolicy) | The hardware crypto usage policy. |
| [HttpUserAgent](#HttpUserAgent) | Specifies the user agent name to be used by all HTTP clients. |
| [HttpVersion](#HttpVersion) | The HTTP version to use in any inner HTTP client structs created. |
| [IgnoreExpiredMSCTLSigningCert](#IgnoreExpiredMSCTLSigningCert) | Whether to tolerate the expired Windows Update signing certificate. |
| [ListDelimiter](#ListDelimiter) | The delimiter character for multi-element lists. |
| [LogDestination](#LogDestination) | Specifies the debug log destination. |
| [LogDetails](#LogDetails) | Specifies the debug log details to dump. |
| [LogFile](#LogFile) | Specifies the debug log filename. |
| [LogFilters](#LogFilters) | Specifies the debug log filters. |
| [LogFlushMode](#LogFlushMode) | Specifies the log flush mode. |
| [LogLevel](#LogLevel) | Specifies the debug log level. |
| [LogMaxEventCount](#LogMaxEventCount) | Specifies the maximum number of events to cache before further action is taken. |
| [LogRotationMode](#LogRotationMode) | Specifies the log rotation mode. |
| [MaxASN1BufferLength](#MaxASN1BufferLength) | Specifies the maximal allowed length for ASN.1 primitive tag data. |
| [MaxASN1TreeDepth](#MaxASN1TreeDepth) | Specifies the maximal depth for processed ASN.1 trees. |
| [OCSPHashAlgorithm](#OCSPHashAlgorithm) | Specifies the hash algorithm to be used to identify certificates in OCSP requests. |
| [OldClientSideRSAFallback](#OldClientSideRSAFallback) | Specifies whether the SSH client should use a SHA1 fallback. |
| [PKICache](#PKICache) | Specifies which PKI elements (certificates, CRLs, OCSP responses) should be cached. |
| [PKICachePath](#PKICachePath) | Specifies the file system path where cached PKI data is stored. |
| [ProductVersion](#ProductVersion) | Returns the version of the SecureBlackbox library. |
| [ServerSSLDHKeyLength](#ServerSSLDHKeyLength) | Sets the size of the TLS DHE key exchange group. |
| [StaticDNS](#StaticDNS) | Specifies whether static DNS rules should be used. |
| [StaticIPAddress\[domain\]](#StaticIPAddress[domain]) | Gets or sets an IP address for the specified domain name. |
| [StaticIPAddresses](#StaticIPAddresses) | Gets or sets all the static DNS rules. |
| [Tag](#Tag) | Allows to store any custom data. |
| [TLSSessionGroup](#TLSSessionGroup) | Specifies the group name of TLS sessions to be used for session resumption. |
| [TLSSessionLifetime](#TLSSessionLifetime) | Specifies lifetime in seconds of the cached TLS session. |
| [TLSSessionPurgeInterval](#TLSSessionPurgeInterval) | Specifies how often the session cache should remove the expired TLS sessions. |
| [UseCRLObjectCaching](#UseCRLObjectCaching) | Specifies whether reuse of loaded CRL objects is enabled. |
| [UseInternalRandom](#UseInternalRandom) | Switches between SecureBlackbox-own and platform PRNGs. |
| [UseLegacyAdESValidation](#UseLegacyAdESValidation) | Enables legacy AdES validation mode. |
| [UseOCSPResponseObjectCaching](#UseOCSPResponseObjectCaching) | Specifies whether reuse of loaded OCSP response objects is enabled. |
| [UseOwnDNSResolver](#UseOwnDNSResolver) | Specifies whether the client structs should use own DNS resolver. |
| [UseSharedSystemStorages](#UseSharedSystemStorages) | Specifies whether the validation engine should use a global per-process copy of the system certificate stores. |
| [UseSystemNativeSizeCalculation](#UseSystemNativeSizeCalculation) | An internal CryptoAPI access tweak. |
| [UseSystemOAEPAndPSS](#UseSystemOAEPAndPSS) | Enforces or disables the use of system-driven RSA OAEP and PSS computations. |
| [UseSystemRandom](#UseSystemRandom) | Enables or disables the use of the OS PRNG. |
| [XMLRDNDescriptorName\[OID\]](#XMLRDNDescriptorName[OID]) | Defines an OID mapping to descriptor names for the certificate's IssuerRDN or SubjectRDN. |
| [XMLRDNDescriptorPriority\[OID\]](#XMLRDNDescriptorPriority[OID]) | Specifies the priority of descriptor names associated with a specific OID. |
| [XMLRDNDescriptorReverseOrder](#XMLRDNDescriptorReverseOrder) | Specifies whether to reverse the order of descriptors in RDN. |
| [XMLRDNDescriptorSeparator](#XMLRDNDescriptorSeparator) | Specifies the separator used between descriptors in RDN. |

# account_info property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Parameters for the ACCT command.

## Syntax

*Rust Syntax*

```text
fn account_info(&self ) -> Result<String, SecureBlackboxError> fn set_account_info(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_account_info_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

Specifies the parameter for ACCT command. If AccountInfo is set, the client automatically sends ACCT command to the server during authentication.

## Data Type

String

# adjust_pasv_address property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Enables or disables automatic adjustment of passive-mode addresses.

## Syntax

*Rust Syntax*

```text
fn adjust_pasv_address(&self ) -> Result<bool, SecureBlackboxError> fn set_adjust_pasv_address(&self, value : bool) ->  Option<SecureBlackboxError>
```

## Default Value

true

## Remarks

Occasional NAT'ed servers misbehave by returning local IP addresses in their PASV mode offers, which are not reachable from the outer network. Set this property to true to make the struct enforce data connections to the same address as the control connection uses.

Note that sometimes (typically, with multi-faced FTP services aka FTP Clouds) you may need to disable this property to make the transfers work right.

## Data Type

bool

# blocked_cert_count property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The number of records in the BlockedCert arrays.

## Syntax

*Rust Syntax*

```text
fn blocked_cert_count(&self ) -> Result<i32, SecureBlackboxError> fn set_blocked_cert_count(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Default Value

0

## Remarks

This property controls the size of the following arrays:

- [blocked_cert_bytes](#blocked_cert_bytes-property-ftpclient-struct)
- [blocked_cert_handle](#blocked_cert_handle-property-ftpclient-struct)

The array indices start at *0* and end at *blocked_cert_count - 1*.

## Data Type

i32

# blocked_cert_bytes property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Returns the raw certificate data in DER format.

## Syntax

*Rust Syntax*

```text
fn blocked_cert_bytes(&self , BlockedCertIndex : i32) -> Result<Vec<u8>, SecureBlackboxError>
```

## Remarks

Returns the raw certificate data in DER format.

The *BlockedCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [BlockedCertCount](#blocked_cert_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

Vec

# blocked_cert_handle property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Allows to get or set a 'handle', a unique identifier of the underlying property object.

## Syntax

*Rust Syntax*

```text
fn blocked_cert_handle(&self , BlockedCertIndex : i32) -> Result<i64, SecureBlackboxError> fn set_blocked_cert_handle(&self, BlockedCertIndex : i32, value : i64) ->  Option<SecureBlackboxError>
```

## Default Value

0

## Remarks

Allows to get or set a 'handle', a unique identifier of the underlying property object. Use this property to assign objects of the same type in a quicker manner, without copying them fieldwise.

When you pass a handle of one object to another, the source object is copied to the destination rather than assigned. It is safe to get rid of the original object after such operation.

```text
  pdfSigner.setSigningCertHandle(certMgr.getCertHandle());
```

The *BlockedCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [BlockedCertCount](#blocked_cert_count-property-ftpclient-struct) property.

## Data Type

i64

# conflict_resolution_mode property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Defines the approach that should be used to resolve various conflicts during batch processing.

## Syntax

*Rust Syntax*

```text
fn conflict_resolution_mode(&self ) -> Result<i32, SecureBlackboxError> fn set_conflict_resolution_mode(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Possible Values

```text
0   // Overwrite1   // Skip2   // AppendToEnd3   // Resume4   // OverwriteIfDiffSize5   // SaveWithNewName6   // RenameExistingTarget
```

## Default Value

0

## Remarks

Use this property to specify the approach to use when landing in conflicting transfer situations.

|  |  |  |
| --- | --- | --- |
| cftmOverwrite | 0 |  |
| cftmSkip | 1 |  |
| cftmAppendToEnd | 2 | The signature is corrupted |
| cftmResume | 3 |  |
| cftmOverwriteIfDiffSize | 4 |  |
| cftmSaveWithNewName | 5 |  |
| cftmRenameExistingTarget | 5 |  |

## Data Type

i32

# connected property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Indicates whether the struct is connected to the server.

## Syntax

*Rust Syntax*

```text
fn connected(&self ) -> Result<bool, SecureBlackboxError>
```

## Default Value

false

## Remarks

Use this property to check if the connection to server is active.

This property is read-only.

## Data Type

bool

# control_channel_log property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Contains the control channel log of the FTP session.

## Syntax

*Rust Syntax*

```text
fn control_channel_log(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

Use this property to access the FTP protocol log (client commands followed by server responses).

This property is read-only.

## Data Type

String

# ctl_conn_info_aead_cipher property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Indicates whether the encryption algorithm used is an AEAD cipher.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_aead_cipher(&self ) -> Result<bool, SecureBlackboxError>
```

## Default Value

false

## Remarks

Indicates whether the encryption algorithm used is an AEAD cipher.

This property is read-only.

## Data Type

bool

# ctl_conn_info_chain_validation_details property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The details of a certificate chain validation outcome.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_chain_validation_details(&self ) -> Result<i32, SecureBlackboxError>
```

## Default Value

0

## Remarks

The details of a certificate chain validation outcome. They may often suggest the reasons that contributed to the overall validation result.

Returns a bit mask of the following options:

|  |  |  |
| --- | --- | --- |
| cvrBadData | 0x0001 | One or more certificates in the validation path are malformed |
| cvrRevoked | 0x0002 | One or more certificates are revoked |
| cvrNotYetValid | 0x0004 | One or more certificates are not yet valid |
| cvrExpired | 0x0008 | One or more certificates are expired |
| cvrInvalidSignature | 0x0010 | A certificate contains a non-valid digital signature |
| cvrUnknownCA | 0x0020 | A CA certificate for one or more certificates has not been found (chain incomplete) |
| cvrCAUnauthorized | 0x0040 | One of the CA certificates are not authorized to act as CA |
| cvrCRLNotVerified | 0x0080 | One or more CRLs could not be verified |
| cvrOCSPNotVerified | 0x0100 | One or more OCSP responses could not be verified |
| cvrIdentityMismatch | 0x0200 | The identity protected by the certificate (a TLS endpoint or an e-mail addressee) does not match what is recorded in the certificate |
| cvrNoKeyUsage | 0x0400 | A mandatory key usage is not enabled in one of the chain certificates |
| cvrBlocked | 0x0800 | One or more certificates are blocked |
| cvrFailure | 0x1000 | General validation failure |
| cvrChainLoop | 0x2000 | Chain loop: one of the CA certificates recursively signs itself |
| cvrWeakAlgorithm | 0x4000 | A weak algorithm is used in one of certificates or revocation elements |
| cvrUserEnforced | 0x8000 | The chain was considered invalid following intervention from a user code |

This property is read-only.

## Data Type

i32

# ctl_conn_info_chain_validation_result property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The outcome of a certificate chain validation routine.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_chain_validation_result(&self ) -> Result<i32, SecureBlackboxError>
```

## Possible Values

```text
0   // Valid1   // ValidButUntrusted2   // Invalid3   // CantBeEstablished
```

## Default Value

0

## Remarks

The outcome of a certificate chain validation routine.

Available options:

|  |  |  |
| --- | --- | --- |
| cvtValid | 0 | The chain is valid |
| cvtValidButUntrusted | 1 | The chain is valid, but the root certificate is not trusted |
| cvtInvalid | 2 | The chain is not valid (some of certificates are revoked, expired, or contain an invalid signature) |
| cvtCantBeEstablished | 3 | The validity of the chain cannot be established because of missing or unavailable validation information (certificates, CRLs, or OCSP responses) |

Use the ValidationLog property to access the detailed validation log.

This property is read-only.

## Data Type

i32

# ctl_conn_info_ciphersuite property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The cipher suite employed by this connection.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_ciphersuite(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The cipher suite employed by this connection.

For TLS connections, this property returns the ciphersuite that was/is employed by the connection.

This property is read-only.

## Data Type

String

# ctl_conn_info_client_authenticated property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Specifies whether client authentication was performed during this connection.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_client_authenticated(&self ) -> Result<bool, SecureBlackboxError>
```

## Default Value

false

## Remarks

Specifies whether client authentication was performed during this connection.

This property is read-only.

## Data Type

bool

# ctl_conn_info_client_auth_requested property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Specifies whether client authentication was requested during this connection.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_client_auth_requested(&self ) -> Result<bool, SecureBlackboxError>
```

## Default Value

false

## Remarks

Specifies whether client authentication was requested during this connection.

This property is read-only.

## Data Type

bool

# ctl_conn_info_connection_established property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Indicates whether the connection has been established fully.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_connection_established(&self ) -> Result<bool, SecureBlackboxError>
```

## Default Value

false

## Remarks

Indicates whether the connection has been established fully.

This property is read-only.

## Data Type

bool

# ctl_conn_info_connection_id property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The unique identifier assigned to this connection.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_connection_id(&self ) -> Result<Vec<u8>, SecureBlackboxError>
```

## Remarks

The unique identifier assigned to this connection.

This property is read-only.

## Data Type

Vec

# ctl_conn_info_digest_algorithm property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The digest algorithm used in a TLS-enabled connection.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_digest_algorithm(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The digest algorithm used in a TLS-enabled connection.

This property is read-only.

## Data Type

String

# ctl_conn_info_encryption_algorithm property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The symmetric encryption algorithm used in a TLS-enabled connection.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_encryption_algorithm(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The symmetric encryption algorithm used in a TLS-enabled connection.

This property is read-only.

## Data Type

String

# ctl_conn_info_exportable property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Indicates whether a TLS connection uses a reduced-strength exportable cipher.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_exportable(&self ) -> Result<bool, SecureBlackboxError>
```

## Default Value

false

## Remarks

Indicates whether a TLS connection uses a reduced-strength exportable cipher.

This property is read-only.

## Data Type

bool

# ctl_conn_info_group property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The elliptic curve used in this connection.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_group(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The elliptic curve used in this connection.

This property was named *NamedECCurve* in SecureBlackbox 2024 and earlier versions.

This property is read-only.

## Data Type

String

# ctl_conn_info_id property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The client connection's unique identifier.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_id(&self ) -> Result<i64, SecureBlackboxError>
```

## Default Value

-1

## Remarks

The client connection's unique identifier. This value is used throughout to refer to a particular client connection.

This property is read-only.

## Data Type

i64

# ctl_conn_info_key_exchange_algorithm property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The key exchange algorithm used in a TLS-enabled connection.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_key_exchange_algorithm(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The key exchange algorithm used in a TLS-enabled connection.

This property is read-only.

## Data Type

String

# ctl_conn_info_key_exchange_key_bits property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The length of the key exchange key of a TLS-enabled connection.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_key_exchange_key_bits(&self ) -> Result<i32, SecureBlackboxError>
```

## Default Value

0

## Remarks

The length of the key exchange key of a TLS-enabled connection.

This property is read-only.

## Data Type

i32

# ctl_conn_info_pfs_cipher property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Indicates whether the chosen ciphersuite provides perfect forward secrecy (PFS).

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_pfs_cipher(&self ) -> Result<bool, SecureBlackboxError>
```

## Default Value

false

## Remarks

Indicates whether the chosen ciphersuite provides perfect forward secrecy (PFS).

This property is read-only.

## Data Type

bool

# ctl_conn_info_pre_shared_identity property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Specifies the identity used when the PSK (Pre-Shared Key) key-exchange mechanism is negotiated.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_pre_shared_identity(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

Specifies the identity used when the PSK (Pre-Shared Key) key-exchange mechanism is negotiated.

This property is read-only.

## Data Type

String

# ctl_conn_info_pre_shared_identity_hint property ([FTPClient](#struct-secureblackboxftpclient) Struct)

A hint professed by the server to help the client select the PSK identity to use.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_pre_shared_identity_hint(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

A hint professed by the server to help the client select the PSK identity to use.

This property is read-only.

## Data Type

String

# ctl_conn_info_public_key_bits property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The length of the public key.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_public_key_bits(&self ) -> Result<i32, SecureBlackboxError>
```

## Default Value

0

## Remarks

The length of the public key.

This property is read-only.

## Data Type

i32

# ctl_conn_info_remote_address property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The client's IP address.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_remote_address(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The client's IP address.

This property is read-only.

## Data Type

String

# ctl_conn_info_remote_port property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The remote port of the client connection.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_remote_port(&self ) -> Result<i32, SecureBlackboxError>
```

## Default Value

0

## Remarks

The remote port of the client connection.

This property is read-only.

## Data Type

i32

# ctl_conn_info_resumed_session property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Indicates whether a TLS-enabled connection was spawned from another TLS connection.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_resumed_session(&self ) -> Result<bool, SecureBlackboxError>
```

## Default Value

false

## Remarks

Indicates whether a TLS-enabled connection was spawned from another TLS connection

This property is read-only.

## Data Type

bool

# ctl_conn_info_secure_connection property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Indicates whether TLS or SSL is enabled for this connection.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_secure_connection(&self ) -> Result<bool, SecureBlackboxError>
```

## Default Value

false

## Remarks

Indicates whether TLS or SSL is enabled for this connection.

This property is read-only.

## Data Type

bool

# ctl_conn_info_server_authenticated property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Indicates whether server authentication was performed during a TLS-enabled connection.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_server_authenticated(&self ) -> Result<bool, SecureBlackboxError>
```

## Default Value

false

## Remarks

Indicates whether server authentication was performed during a TLS-enabled connection.

This property is read-only.

## Data Type

bool

# ctl_conn_info_signature_algorithm property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The signature algorithm used in a TLS handshake.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_signature_algorithm(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The signature algorithm used in a TLS handshake.

This property is read-only.

## Data Type

String

# ctl_conn_info_symmetric_block_size property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The block size of the symmetric algorithm used.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_symmetric_block_size(&self ) -> Result<i32, SecureBlackboxError>
```

## Default Value

0

## Remarks

The block size of the symmetric algorithm used.

This property is read-only.

## Data Type

i32

# ctl_conn_info_symmetric_key_bits property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The key length of the symmetric algorithm used.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_symmetric_key_bits(&self ) -> Result<i32, SecureBlackboxError>
```

## Default Value

0

## Remarks

The key length of the symmetric algorithm used.

This property is read-only.

## Data Type

i32

# ctl_conn_info_total_bytes_received property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The total number of bytes received over this connection.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_total_bytes_received(&self ) -> Result<i64, SecureBlackboxError>
```

## Default Value

0

## Remarks

The total number of bytes received over this connection.

This property is read-only.

## Data Type

i64

# ctl_conn_info_total_bytes_sent property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The total number of bytes sent over this connection.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_total_bytes_sent(&self ) -> Result<i64, SecureBlackboxError>
```

## Default Value

0

## Remarks

The total number of bytes sent over this connection.

This property is read-only.

## Data Type

i64

# ctl_conn_info_validation_log property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Contains the server certificate's chain validation log.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_validation_log(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

Contains the server certificate's chain validation log. This information may be very useful in investigating chain validation failures.

This property is read-only.

## Data Type

String

# ctl_conn_info_version property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Indicates the version of SSL/TLS protocol negotiated during this connection.

## Syntax

*Rust Syntax*

```text
fn ctl_conn_info_version(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

Indicates the version of SSL/TLS protocol negotiated during this connection.

This property is read-only.

## Data Type

String

# curr_list_entry_access_time property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Contains the last access time for this file, in UTC.

## Syntax

*Rust Syntax*

```text
fn curr_list_entry_access_time(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

Contains the last access time for this file, in UTC.

This property is read-only.

## Data Type

String

# curr_list_entry_creation_time property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Contains this file's creation time, in UTC.

## Syntax

*Rust Syntax*

```text
fn curr_list_entry_creation_time(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

Contains this file's creation time, in UTC.

This property is read-only.

## Data Type

String

# curr_list_entry_entry_format property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The file listing format: cfefUnknown 0 cfefUnix 1 cfefWindows 2 cfefMLSD 3 .

## Syntax

*Rust Syntax*

```text
fn curr_list_entry_entry_format(&self ) -> Result<i32, SecureBlackboxError>
```

## Possible Values

```text
0   // Unknown1   // Unix2   // Windows3   // MLSD
```

## Default Value

0

## Remarks

The file listing format:

|  |  |
| --- | --- |
| cfefUnknown | 0 |
| cfefUnix | 1 |
| cfefWindows | 2 |
| cfefMLSD | 3 |

This property is read-only.

## Data Type

i32

# curr_list_entry_file_type property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The type of the entry: fetUnknown 0 fetDirectory 1 fetFile 2 fetSymlink 3 fetSpecial 4 fetCurrentDirectory 5 fetParentDirectory 6 fetSocket 7 fetCharDevice 8 fetBlockDevice 9 fetFIFO 10 .

## Syntax

*Rust Syntax*

```text
fn curr_list_entry_file_type(&self ) -> Result<i32, SecureBlackboxError>
```

## Possible Values

```text
0   // Unknown1   // Directory2   // File3   // Symlink4   // Special5   // CurrentDirectory6   // ParentDirectory7   // Socket8   // CharDevice9   // BlockDevice10   // FIFO
```

## Default Value

0

## Remarks

The type of the entry:

|  |  |
| --- | --- |
| fetUnknown | 0 |
| fetDirectory | 1 |
| fetFile | 2 |
| fetSymlink | 3 |
| fetSpecial | 4 |
| fetCurrentDirectory | 5 |
| fetParentDirectory | 6 |
| fetSocket | 7 |
| fetCharDevice | 8 |
| fetBlockDevice | 9 |
| fetFIFO | 10 |

This property is read-only.

## Data Type

i32

# curr_list_entry_handle property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Allows to get or set a 'handle', a unique identifier of the underlying property object.

## Syntax

*Rust Syntax*

```text
fn curr_list_entry_handle(&self ) -> Result<i64, SecureBlackboxError>
```

## Default Value

0

## Remarks

Allows to get or set a 'handle', a unique identifier of the underlying property object. Use this property to assign objects of the same type in a quicker manner, without copying them fieldwise.

When you pass a handle of one object to another, the source object is copied to the destination rather than assigned. It is safe to get rid of the original object after such operation.

```text
  pdfSigner.setSigningCertHandle(certMgr.getCertHandle());
```

This property is read-only.

## Data Type

i64

# curr_list_entry_modification_time property ([FTPClient](#struct-secureblackboxftpclient) Struct)

File last modification date/time.

## Syntax

*Rust Syntax*

```text
fn curr_list_entry_modification_time(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

File last modification date/time.

This property is read-only.

## Data Type

String

# curr_list_entry_name property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The file or directory name.

## Syntax

*Rust Syntax*

```text
fn curr_list_entry_name(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The file or directory name.

This property is read-only.

## Data Type

String

# curr_list_entry_path property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The full path to the file or directory.

## Syntax

*Rust Syntax*

```text
fn curr_list_entry_path(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The full path to the file or directory.

This property is read-only.

## Data Type

String

# curr_list_entry_principal property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Specifies the owner of the file/directory.

## Syntax

*Rust Syntax*

```text
fn curr_list_entry_principal(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

Specifies the owner of the file/directory.

Note: in earlier versions this property was called Owner. It was renamed to Principal to avoid clashes with certain SDK namings.

This property is read-only.

## Data Type

String

# curr_list_entry_size property ([FTPClient](#struct-secureblackboxftpclient) Struct)

File size in bytes.

## Syntax

*Rust Syntax*

```text
fn curr_list_entry_size(&self ) -> Result<i64, SecureBlackboxError>
```

## Default Value

0

## Remarks

File size in bytes.

This property is read-only.

## Data Type

i64

# curr_list_entry_unix_perms property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The file Unix permissions bit mask (e.

## Syntax

*Rust Syntax*

```text
fn curr_list_entry_unix_perms(&self ) -> Result<i32, SecureBlackboxError>
```

## Default Value

511

## Remarks

The file Unix permissions bit mask (e.g. rwxrwxrwx=511 (0777); rwxr--r--=484 (0744)).

This property is read-only.

## Data Type

i32

# curr_list_entry_unparsed_name property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The unparsed entry as returned by the server.

## Syntax

*Rust Syntax*

```text
fn curr_list_entry_unparsed_name(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The unparsed entry as returned by the server. Sometimes this is also known as "long name".

This property is read-only.

## Data Type

String

# data_conn_info_aead_cipher property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Indicates whether the encryption algorithm used is an AEAD cipher.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_aead_cipher(&self ) -> Result<bool, SecureBlackboxError>
```

## Default Value

false

## Remarks

Indicates whether the encryption algorithm used is an AEAD cipher.

This property is read-only.

## Data Type

bool

# data_conn_info_chain_validation_details property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The details of a certificate chain validation outcome.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_chain_validation_details(&self ) -> Result<i32, SecureBlackboxError>
```

## Default Value

0

## Remarks

The details of a certificate chain validation outcome. They may often suggest the reasons that contributed to the overall validation result.

Returns a bit mask of the following options:

|  |  |  |
| --- | --- | --- |
| cvrBadData | 0x0001 | One or more certificates in the validation path are malformed |
| cvrRevoked | 0x0002 | One or more certificates are revoked |
| cvrNotYetValid | 0x0004 | One or more certificates are not yet valid |
| cvrExpired | 0x0008 | One or more certificates are expired |
| cvrInvalidSignature | 0x0010 | A certificate contains a non-valid digital signature |
| cvrUnknownCA | 0x0020 | A CA certificate for one or more certificates has not been found (chain incomplete) |
| cvrCAUnauthorized | 0x0040 | One of the CA certificates are not authorized to act as CA |
| cvrCRLNotVerified | 0x0080 | One or more CRLs could not be verified |
| cvrOCSPNotVerified | 0x0100 | One or more OCSP responses could not be verified |
| cvrIdentityMismatch | 0x0200 | The identity protected by the certificate (a TLS endpoint or an e-mail addressee) does not match what is recorded in the certificate |
| cvrNoKeyUsage | 0x0400 | A mandatory key usage is not enabled in one of the chain certificates |
| cvrBlocked | 0x0800 | One or more certificates are blocked |
| cvrFailure | 0x1000 | General validation failure |
| cvrChainLoop | 0x2000 | Chain loop: one of the CA certificates recursively signs itself |
| cvrWeakAlgorithm | 0x4000 | A weak algorithm is used in one of certificates or revocation elements |
| cvrUserEnforced | 0x8000 | The chain was considered invalid following intervention from a user code |

This property is read-only.

## Data Type

i32

# data_conn_info_chain_validation_result property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The outcome of a certificate chain validation routine.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_chain_validation_result(&self ) -> Result<i32, SecureBlackboxError>
```

## Possible Values

```text
0   // Valid1   // ValidButUntrusted2   // Invalid3   // CantBeEstablished
```

## Default Value

0

## Remarks

The outcome of a certificate chain validation routine.

Available options:

|  |  |  |
| --- | --- | --- |
| cvtValid | 0 | The chain is valid |
| cvtValidButUntrusted | 1 | The chain is valid, but the root certificate is not trusted |
| cvtInvalid | 2 | The chain is not valid (some of certificates are revoked, expired, or contain an invalid signature) |
| cvtCantBeEstablished | 3 | The validity of the chain cannot be established because of missing or unavailable validation information (certificates, CRLs, or OCSP responses) |

Use the ValidationLog property to access the detailed validation log.

This property is read-only.

## Data Type

i32

# data_conn_info_ciphersuite property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The cipher suite employed by this connection.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_ciphersuite(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The cipher suite employed by this connection.

For TLS connections, this property returns the ciphersuite that was/is employed by the connection.

This property is read-only.

## Data Type

String

# data_conn_info_client_authenticated property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Specifies whether client authentication was performed during this connection.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_client_authenticated(&self ) -> Result<bool, SecureBlackboxError>
```

## Default Value

false

## Remarks

Specifies whether client authentication was performed during this connection.

This property is read-only.

## Data Type

bool

# data_conn_info_client_auth_requested property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Specifies whether client authentication was requested during this connection.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_client_auth_requested(&self ) -> Result<bool, SecureBlackboxError>
```

## Default Value

false

## Remarks

Specifies whether client authentication was requested during this connection.

This property is read-only.

## Data Type

bool

# data_conn_info_connection_established property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Indicates whether the connection has been established fully.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_connection_established(&self ) -> Result<bool, SecureBlackboxError>
```

## Default Value

false

## Remarks

Indicates whether the connection has been established fully.

This property is read-only.

## Data Type

bool

# data_conn_info_connection_id property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The unique identifier assigned to this connection.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_connection_id(&self ) -> Result<Vec<u8>, SecureBlackboxError>
```

## Remarks

The unique identifier assigned to this connection.

This property is read-only.

## Data Type

Vec

# data_conn_info_digest_algorithm property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The digest algorithm used in a TLS-enabled connection.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_digest_algorithm(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The digest algorithm used in a TLS-enabled connection.

This property is read-only.

## Data Type

String

# data_conn_info_encryption_algorithm property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The symmetric encryption algorithm used in a TLS-enabled connection.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_encryption_algorithm(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The symmetric encryption algorithm used in a TLS-enabled connection.

This property is read-only.

## Data Type

String

# data_conn_info_exportable property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Indicates whether a TLS connection uses a reduced-strength exportable cipher.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_exportable(&self ) -> Result<bool, SecureBlackboxError>
```

## Default Value

false

## Remarks

Indicates whether a TLS connection uses a reduced-strength exportable cipher.

This property is read-only.

## Data Type

bool

# data_conn_info_group property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The elliptic curve used in this connection.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_group(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The elliptic curve used in this connection.

This property was named *NamedECCurve* in SecureBlackbox 2024 and earlier versions.

This property is read-only.

## Data Type

String

# data_conn_info_id property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The client connection's unique identifier.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_id(&self ) -> Result<i64, SecureBlackboxError>
```

## Default Value

-1

## Remarks

The client connection's unique identifier. This value is used throughout to refer to a particular client connection.

This property is read-only.

## Data Type

i64

# data_conn_info_key_exchange_algorithm property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The key exchange algorithm used in a TLS-enabled connection.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_key_exchange_algorithm(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The key exchange algorithm used in a TLS-enabled connection.

This property is read-only.

## Data Type

String

# data_conn_info_key_exchange_key_bits property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The length of the key exchange key of a TLS-enabled connection.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_key_exchange_key_bits(&self ) -> Result<i32, SecureBlackboxError>
```

## Default Value

0

## Remarks

The length of the key exchange key of a TLS-enabled connection.

This property is read-only.

## Data Type

i32

# data_conn_info_pfs_cipher property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Indicates whether the chosen ciphersuite provides perfect forward secrecy (PFS).

## Syntax

*Rust Syntax*

```text
fn data_conn_info_pfs_cipher(&self ) -> Result<bool, SecureBlackboxError>
```

## Default Value

false

## Remarks

Indicates whether the chosen ciphersuite provides perfect forward secrecy (PFS).

This property is read-only.

## Data Type

bool

# data_conn_info_pre_shared_identity property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Specifies the identity used when the PSK (Pre-Shared Key) key-exchange mechanism is negotiated.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_pre_shared_identity(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

Specifies the identity used when the PSK (Pre-Shared Key) key-exchange mechanism is negotiated.

This property is read-only.

## Data Type

String

# data_conn_info_pre_shared_identity_hint property ([FTPClient](#struct-secureblackboxftpclient) Struct)

A hint professed by the server to help the client select the PSK identity to use.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_pre_shared_identity_hint(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

A hint professed by the server to help the client select the PSK identity to use.

This property is read-only.

## Data Type

String

# data_conn_info_public_key_bits property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The length of the public key.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_public_key_bits(&self ) -> Result<i32, SecureBlackboxError>
```

## Default Value

0

## Remarks

The length of the public key.

This property is read-only.

## Data Type

i32

# data_conn_info_remote_address property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The client's IP address.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_remote_address(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The client's IP address.

This property is read-only.

## Data Type

String

# data_conn_info_remote_port property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The remote port of the client connection.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_remote_port(&self ) -> Result<i32, SecureBlackboxError>
```

## Default Value

0

## Remarks

The remote port of the client connection.

This property is read-only.

## Data Type

i32

# data_conn_info_resumed_session property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Indicates whether a TLS-enabled connection was spawned from another TLS connection.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_resumed_session(&self ) -> Result<bool, SecureBlackboxError>
```

## Default Value

false

## Remarks

Indicates whether a TLS-enabled connection was spawned from another TLS connection

This property is read-only.

## Data Type

bool

# data_conn_info_secure_connection property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Indicates whether TLS or SSL is enabled for this connection.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_secure_connection(&self ) -> Result<bool, SecureBlackboxError>
```

## Default Value

false

## Remarks

Indicates whether TLS or SSL is enabled for this connection.

This property is read-only.

## Data Type

bool

# data_conn_info_server_authenticated property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Indicates whether server authentication was performed during a TLS-enabled connection.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_server_authenticated(&self ) -> Result<bool, SecureBlackboxError>
```

## Default Value

false

## Remarks

Indicates whether server authentication was performed during a TLS-enabled connection.

This property is read-only.

## Data Type

bool

# data_conn_info_signature_algorithm property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The signature algorithm used in a TLS handshake.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_signature_algorithm(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The signature algorithm used in a TLS handshake.

This property is read-only.

## Data Type

String

# data_conn_info_symmetric_block_size property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The block size of the symmetric algorithm used.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_symmetric_block_size(&self ) -> Result<i32, SecureBlackboxError>
```

## Default Value

0

## Remarks

The block size of the symmetric algorithm used.

This property is read-only.

## Data Type

i32

# data_conn_info_symmetric_key_bits property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The key length of the symmetric algorithm used.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_symmetric_key_bits(&self ) -> Result<i32, SecureBlackboxError>
```

## Default Value

0

## Remarks

The key length of the symmetric algorithm used.

This property is read-only.

## Data Type

i32

# data_conn_info_total_bytes_received property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The total number of bytes received over this connection.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_total_bytes_received(&self ) -> Result<i64, SecureBlackboxError>
```

## Default Value

0

## Remarks

The total number of bytes received over this connection.

This property is read-only.

## Data Type

i64

# data_conn_info_total_bytes_sent property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The total number of bytes sent over this connection.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_total_bytes_sent(&self ) -> Result<i64, SecureBlackboxError>
```

## Default Value

0

## Remarks

The total number of bytes sent over this connection.

This property is read-only.

## Data Type

i64

# data_conn_info_validation_log property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Contains the server certificate's chain validation log.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_validation_log(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

Contains the server certificate's chain validation log. This information may be very useful in investigating chain validation failures.

This property is read-only.

## Data Type

String

# data_conn_info_version property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Indicates the version of SSL/TLS protocol negotiated during this connection.

## Syntax

*Rust Syntax*

```text
fn data_conn_info_version(&self ) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

Indicates the version of SSL/TLS protocol negotiated during this connection.

This property is read-only.

## Data Type

String

# encrypt_data_channel property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Enables or disables data channel encryption.

## Syntax

*Rust Syntax*

```text
fn encrypt_data_channel(&self ) -> Result<bool, SecureBlackboxError> fn set_encrypt_data_channel(&self, value : bool) ->  Option<SecureBlackboxError>
```

## Default Value

true

## Remarks

Use this property to enable or disable data channel encryption. This property should be configured before [connect](#connect-method-ftpclient-struct) method is called.

## Data Type

bool

# external_crypto_async_document_id property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Specifies an optional document ID for SignAsyncBegin() and SignAsyncEnd() calls.

## Syntax

*Rust Syntax*

```text
fn external_crypto_async_document_id(&self ) -> Result<String, SecureBlackboxError> fn set_external_crypto_async_document_id(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_external_crypto_async_document_id_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

Specifies an optional document ID for SignAsyncBegin() and SignAsyncEnd() calls.

Use this property when working with multi-signature DCAuth requests and responses to uniquely identify documents signed within a larger batch. On the completion stage, this value helps the signing component identify the correct signature in the returned batch of responses.

If using batched requests, make sure to set this property to the same value on both the pre-signing (SignAsyncBegin) and completion (SignAsyncEnd) stages.

## Data Type

String

# external_crypto_custom_params property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Custom parameters to be passed to the signing service (uninterpreted).

## Syntax

*Rust Syntax*

```text
fn external_crypto_custom_params(&self ) -> Result<String, SecureBlackboxError> fn set_external_crypto_custom_params(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_external_crypto_custom_params_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

Custom parameters to be passed to the signing service (uninterpreted).

## Data Type

String

# external_crypto_data property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Additional data to be included in the async state and mirrored back by the requestor.

## Syntax

*Rust Syntax*

```text
fn external_crypto_data(&self ) -> Result<String, SecureBlackboxError> fn set_external_crypto_data(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_external_crypto_data_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

Additional data to be included in the async state and mirrored back by the requestor.

## Data Type

String

# external_crypto_external_hash_calculation property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Specifies whether the message hash is to be calculated at the external endpoint.

## Syntax

*Rust Syntax*

```text
fn external_crypto_external_hash_calculation(&self ) -> Result<bool, SecureBlackboxError> fn set_external_crypto_external_hash_calculation(&self, value : bool) ->  Option<SecureBlackboxError>
```

## Default Value

false

## Remarks

Specifies whether the message hash is to be calculated at the external endpoint. Please note that this mode is not supported by the DCAuth struct.

If set to true, the struct will pass a few kilobytes of to-be-signed data from the document to the OnExternalSign event. This only applies when SignExternal() is called.

## Data Type

bool

# external_crypto_hash_algorithm property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Specifies the request's signature hash algorithm.

## Syntax

*Rust Syntax*

```text
fn external_crypto_hash_algorithm(&self ) -> Result<String, SecureBlackboxError> fn set_external_crypto_hash_algorithm(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_external_crypto_hash_algorithm_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

"SHA256"

## Remarks

Specifies the request's signature hash algorithm.

|  |  |  |
| --- | --- | --- |
| SB_HASH_ALGORITHM_SHA1 | SHA1 |  |
| SB_HASH_ALGORITHM_SHA224 | SHA224 |  |
| SB_HASH_ALGORITHM_SHA256 | SHA256 |  |
| SB_HASH_ALGORITHM_SHA384 | SHA384 |  |
| SB_HASH_ALGORITHM_SHA512 | SHA512 |  |
| SB_HASH_ALGORITHM_MD2 | MD2 |  |
| SB_HASH_ALGORITHM_MD4 | MD4 |  |
| SB_HASH_ALGORITHM_MD5 | MD5 |  |
| SB_HASH_ALGORITHM_RIPEMD160 | RIPEMD160 |  |
| SB_HASH_ALGORITHM_CRC32 | CRC32 |  |
| SB_HASH_ALGORITHM_SSL3 | SSL3 |  |
| SB_HASH_ALGORITHM_GOST_R3411_1994 | GOST1994 |  |
| SB_HASH_ALGORITHM_WHIRLPOOL | WHIRLPOOL |  |
| SB_HASH_ALGORITHM_POLY1305 | POLY1305 |  |
| SB_HASH_ALGORITHM_SHA3_224 | SHA3_224 |  |
| SB_HASH_ALGORITHM_SHA3_256 | SHA3_256 |  |
| SB_HASH_ALGORITHM_SHA3_384 | SHA3_384 |  |
| SB_HASH_ALGORITHM_SHA3_512 | SHA3_512 |  |
| SB_HASH_ALGORITHM_BLAKE2S_128 | BLAKE2S_128 |  |
| SB_HASH_ALGORITHM_BLAKE2S_160 | BLAKE2S_160 |  |
| SB_HASH_ALGORITHM_BLAKE2S_224 | BLAKE2S_224 |  |
| SB_HASH_ALGORITHM_BLAKE2S_256 | BLAKE2S_256 |  |
| SB_HASH_ALGORITHM_BLAKE2B_160 | BLAKE2B_160 |  |
| SB_HASH_ALGORITHM_BLAKE2B_256 | BLAKE2B_256 |  |
| SB_HASH_ALGORITHM_BLAKE2B_384 | BLAKE2B_384 |  |
| SB_HASH_ALGORITHM_BLAKE2B_512 | BLAKE2B_512 |  |
| SB_HASH_ALGORITHM_SHAKE_128 | SHAKE_128 |  |
| SB_HASH_ALGORITHM_SHAKE_256 | SHAKE_256 |  |
| SB_HASH_ALGORITHM_SHAKE_128_LEN | SHAKE_128_LEN |  |
| SB_HASH_ALGORITHM_SHAKE_256_LEN | SHAKE_256_LEN |  |

## Data Type

String

# external_crypto_key_id property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The ID of the pre-shared key used for DC request authentication.

## Syntax

*Rust Syntax*

```text
fn external_crypto_key_id(&self ) -> Result<String, SecureBlackboxError> fn set_external_crypto_key_id(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_external_crypto_key_id_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

The ID of the pre-shared key used for DC request authentication.

Asynchronous DCAuth-driven communication requires that parties authenticate each other with a secret pre-shared cryptographic key. This provides an extra protection layer for the protocol and diminishes the risk of the private key becoming abused by foreign parties. Use this property to provide the pre-shared key identifier, and use [external_crypto_key_secret](#external_crypto_key_secret-property-ftpclient-struct) to pass the key itself.

The same KeyID/KeySecret pair should be used on the DCAuth side for the signing requests to be accepted.

Note: The KeyID/KeySecret scheme is very similar to the AuthKey scheme used in various Cloud service providers to authenticate users.

Example:

```text
  signer.ExternalCrypto.KeyID = "MainSigningKey";
  signer.ExternalCrypto.KeySecret = "abcdef0123456789";
```

## Data Type

String

# external_crypto_key_secret property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The pre-shared key used for DC request authentication.

## Syntax

*Rust Syntax*

```text
fn external_crypto_key_secret(&self ) -> Result<String, SecureBlackboxError> fn set_external_crypto_key_secret(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_external_crypto_key_secret_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

The pre-shared key used for DC request authentication. This key must be set and match the key used by the DCAuth counterpart for the scheme to work.

Read more about configuring authentication in the [external_crypto_key_id](#external_crypto_key_id-property-ftpclient-struct) topic.

## Data Type

String

# external_crypto_method property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Specifies the asynchronous signing method.

## Syntax

*Rust Syntax*

```text
fn external_crypto_method(&self ) -> Result<i32, SecureBlackboxError> fn set_external_crypto_method(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Possible Values

```text
0   // PKCS11   // PKCS7
```

## Default Value

0

## Remarks

Specifies the asynchronous signing method. This is typically defined by the DC server capabilities and setup.

Available options:

|  |  |
| --- | --- |
| asmdPKCS1 | 0 |
| asmdPKCS7 | 1 |

## Data Type

i32

# external_crypto_mode property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Specifies the external cryptography mode.

## Syntax

*Rust Syntax*

```text
fn external_crypto_mode(&self ) -> Result<i32, SecureBlackboxError> fn set_external_crypto_mode(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Possible Values

```text
0   // Default1   // Disabled2   // Generic3   // DCAuth4   // DCAuthJSON
```

## Default Value

0

## Remarks

Specifies the external cryptography mode.

Available options:

|  |  |
| --- | --- |
| ecmDefault | The default value (0) |
| ecmDisabled | Do not use DC or external signing (1) |
| ecmGeneric | Generic external signing with the OnExternalSign event (2) |
| ecmDCAuth | DCAuth signing (3) |
| ecmDCAuthJSON | DCAuth signing in JSON format (4) |

## Data Type

i32

# external_crypto_public_key_algorithm property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Provide the public key algorithm here if the certificate is not available on the pre-signing stage.

## Syntax

*Rust Syntax*

```text
fn external_crypto_public_key_algorithm(&self ) -> Result<String, SecureBlackboxError> fn set_external_crypto_public_key_algorithm(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_external_crypto_public_key_algorithm_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

Provide the public key algorithm here if the certificate is not available on the pre-signing stage.

|  |  |  |
| --- | --- | --- |
| SB_CERT_ALGORITHM_ID_RSA_ENCRYPTION | rsaEncryption |  |
| SB_CERT_ALGORITHM_MD2_RSA_ENCRYPTION | md2withRSAEncryption |  |
| SB_CERT_ALGORITHM_MD5_RSA_ENCRYPTION | md5withRSAEncryption |  |
| SB_CERT_ALGORITHM_SHA1_RSA_ENCRYPTION | sha1withRSAEncryption |  |
| SB_CERT_ALGORITHM_ID_DSA | id-dsa |  |
| SB_CERT_ALGORITHM_ID_DSA_SHA1 | id-dsa-with-sha1 |  |
| SB_CERT_ALGORITHM_DH_PUBLIC | dhpublicnumber |  |
| SB_CERT_ALGORITHM_SHA224_RSA_ENCRYPTION | sha224WithRSAEncryption |  |
| SB_CERT_ALGORITHM_SHA256_RSA_ENCRYPTION | sha256WithRSAEncryption |  |
| SB_CERT_ALGORITHM_SHA384_RSA_ENCRYPTION | sha384WithRSAEncryption |  |
| SB_CERT_ALGORITHM_SHA512_RSA_ENCRYPTION | sha512WithRSAEncryption |  |
| SB_CERT_ALGORITHM_ID_RSAPSS | id-RSASSA-PSS |  |
| SB_CERT_ALGORITHM_ID_RSAOAEP | id-RSAES-OAEP |  |
| SB_CERT_ALGORITHM_RSASIGNATURE_RIPEMD160 | ripemd160withRSA |  |
| SB_CERT_ALGORITHM_ID_ELGAMAL | elGamal |  |
| SB_CERT_ALGORITHM_SHA1_ECDSA | ecdsa-with-SHA1 |  |
| SB_CERT_ALGORITHM_RECOMMENDED_ECDSA | ecdsa-recommended |  |
| SB_CERT_ALGORITHM_SHA224_ECDSA | ecdsa-with-SHA224 |  |
| SB_CERT_ALGORITHM_SHA256_ECDSA | ecdsa-with-SHA256 |  |
| SB_CERT_ALGORITHM_SHA384_ECDSA | ecdsa-with-SHA384 |  |
| SB_CERT_ALGORITHM_SHA512_ECDSA | ecdsa-with-SHA512 |  |
| SB_CERT_ALGORITHM_EC | id-ecPublicKey |  |
| SB_CERT_ALGORITHM_SPECIFIED_ECDSA | ecdsa-specified |  |
| SB_CERT_ALGORITHM_GOST_R3410_1994 | id-GostR3410-94 |  |
| SB_CERT_ALGORITHM_GOST_R3410_2001 | id-GostR3410-2001 |  |
| SB_CERT_ALGORITHM_GOST_R3411_WITH_R3410_1994 | id-GostR3411-94-with-GostR3410-94 |  |
| SB_CERT_ALGORITHM_GOST_R3411_WITH_R3410_2001 | id-GostR3411-94-with-GostR3410-2001 |  |
| SB_CERT_ALGORITHM_SHA1_ECDSA_PLAIN | ecdsa-plain-SHA1 |  |
| SB_CERT_ALGORITHM_SHA224_ECDSA_PLAIN | ecdsa-plain-SHA224 |  |
| SB_CERT_ALGORITHM_SHA256_ECDSA_PLAIN | ecdsa-plain-SHA256 |  |
| SB_CERT_ALGORITHM_SHA384_ECDSA_PLAIN | ecdsa-plain-SHA384 |  |
| SB_CERT_ALGORITHM_SHA512_ECDSA_PLAIN | ecdsa-plain-SHA512 |  |
| SB_CERT_ALGORITHM_RIPEMD160_ECDSA_PLAIN | ecdsa-plain-RIPEMD160 |  |
| SB_CERT_ALGORITHM_WHIRLPOOL_RSA_ENCRYPTION | whirlpoolWithRSAEncryption |  |
| SB_CERT_ALGORITHM_ID_DSA_SHA224 | id-dsa-with-sha224 |  |
| SB_CERT_ALGORITHM_ID_DSA_SHA256 | id-dsa-with-sha256 |  |
| SB_CERT_ALGORITHM_SHA3_224_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-sha3-224 |  |
| SB_CERT_ALGORITHM_SHA3_256_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-sha3-256 |  |
| SB_CERT_ALGORITHM_SHA3_384_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-sha3-384 |  |
| SB_CERT_ALGORITHM_SHA3_512_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-sha3-512 |  |
| SB_CERT_ALGORITHM_SHA3_224_ECDSA | id-ecdsa-with-sha3-224 |  |
| SB_CERT_ALGORITHM_SHA3_256_ECDSA | id-ecdsa-with-sha3-256 |  |
| SB_CERT_ALGORITHM_SHA3_384_ECDSA | id-ecdsa-with-sha3-384 |  |
| SB_CERT_ALGORITHM_SHA3_512_ECDSA | id-ecdsa-with-sha3-512 |  |
| SB_CERT_ALGORITHM_SHA3_224_ECDSA_PLAIN | id-ecdsa-plain-with-sha3-224 |  |
| SB_CERT_ALGORITHM_SHA3_256_ECDSA_PLAIN | id-ecdsa-plain-with-sha3-256 |  |
| SB_CERT_ALGORITHM_SHA3_384_ECDSA_PLAIN | id-ecdsa-plain-with-sha3-384 |  |
| SB_CERT_ALGORITHM_SHA3_512_ECDSA_PLAIN | id-ecdsa-plain-with-sha3-512 |  |
| SB_CERT_ALGORITHM_ID_DSA_SHA3_224 | id-dsa-with-sha3-224 |  |
| SB_CERT_ALGORITHM_ID_DSA_SHA3_256 | id-dsa-with-sha3-256 |  |
| SB_CERT_ALGORITHM_BLAKE2S_128_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-blake2s128 |  |
| SB_CERT_ALGORITHM_BLAKE2S_160_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-blake2s160 |  |
| SB_CERT_ALGORITHM_BLAKE2S_224_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-blake2s224 |  |
| SB_CERT_ALGORITHM_BLAKE2S_256_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-blake2s256 |  |
| SB_CERT_ALGORITHM_BLAKE2B_160_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-blake2b160 |  |
| SB_CERT_ALGORITHM_BLAKE2B_256_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-blake2b256 |  |
| SB_CERT_ALGORITHM_BLAKE2B_384_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-blake2b384 |  |
| SB_CERT_ALGORITHM_BLAKE2B_512_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-blake2b512 |  |
| SB_CERT_ALGORITHM_BLAKE2S_128_ECDSA | id-ecdsa-with-blake2s128 |  |
| SB_CERT_ALGORITHM_BLAKE2S_160_ECDSA | id-ecdsa-with-blake2s160 |  |
| SB_CERT_ALGORITHM_BLAKE2S_224_ECDSA | id-ecdsa-with-blake2s224 |  |
| SB_CERT_ALGORITHM_BLAKE2S_256_ECDSA | id-ecdsa-with-blake2s256 |  |
| SB_CERT_ALGORITHM_BLAKE2B_160_ECDSA | id-ecdsa-with-blake2b160 |  |
| SB_CERT_ALGORITHM_BLAKE2B_256_ECDSA | id-ecdsa-with-blake2b256 |  |
| SB_CERT_ALGORITHM_BLAKE2B_384_ECDSA | id-ecdsa-with-blake2b384 |  |
| SB_CERT_ALGORITHM_BLAKE2B_512_ECDSA | id-ecdsa-with-blake2b512 |  |
| SB_CERT_ALGORITHM_BLAKE2S_128_ECDSA_PLAIN | id-ecdsa-plain-with-blake2s128 |  |
| SB_CERT_ALGORITHM_BLAKE2S_160_ECDSA_PLAIN | id-ecdsa-plain-with-blake2s160 |  |
| SB_CERT_ALGORITHM_BLAKE2S_224_ECDSA_PLAIN | id-ecdsa-plain-with-blake2s224 |  |
| SB_CERT_ALGORITHM_BLAKE2S_256_ECDSA_PLAIN | id-ecdsa-plain-with-blake2s256 |  |
| SB_CERT_ALGORITHM_BLAKE2B_160_ECDSA_PLAIN | id-ecdsa-plain-with-blake2b160 |  |
| SB_CERT_ALGORITHM_BLAKE2B_256_ECDSA_PLAIN | id-ecdsa-plain-with-blake2b256 |  |
| SB_CERT_ALGORITHM_BLAKE2B_384_ECDSA_PLAIN | id-ecdsa-plain-with-blake2b384 |  |
| SB_CERT_ALGORITHM_BLAKE2B_512_ECDSA_PLAIN | id-ecdsa-plain-with-blake2b512 |  |
| SB_CERT_ALGORITHM_ID_DSA_BLAKE2S_224 | id-dsa-with-blake2s224 |  |
| SB_CERT_ALGORITHM_ID_DSA_BLAKE2S_256 | id-dsa-with-blake2s256 |  |
| SB_CERT_ALGORITHM_EDDSA_ED25519 | id-Ed25519 |  |
| SB_CERT_ALGORITHM_EDDSA_ED448 | id-Ed448 |  |
| SB_CERT_ALGORITHM_EDDSA_ED25519_PH | id-Ed25519ph |  |
| SB_CERT_ALGORITHM_EDDSA_ED448_PH | id-Ed448ph |  |
| SB_CERT_ALGORITHM_EDDSA | id-EdDSA |  |
| SB_CERT_ALGORITHM_EDDSA_SIGNATURE | id-EdDSA-sig |  |
| SB_CERT_ALGORITHM_MLDSA_44 | id-ml-dsa-44 |  |
| SB_CERT_ALGORITHM_MLDSA_65 | id-ml-dsa-65 |  |
| SB_CERT_ALGORITHM_MLDSA_87 | id-ml-dsa-87 |  |
| SB_CERT_ALGORITHM_HASH_MLDSA_44_SHA512 | id-hash-ml-dsa-44-with-sha512 |  |
| SB_CERT_ALGORITHM_HASH_MLDSA_65_SHA512 | id-hash-ml-dsa-65-with-sha512 |  |
| SB_CERT_ALGORITHM_HASH_MLDSA_87_SHA512 | id-hash-ml-dsa-87-with-sha512 |  |
| SB_CERT_ALGORITHM_MLKEM_512 | id-ml-kem-512 |  |
| SB_CERT_ALGORITHM_MLKEM_768 | id-ml-kem-768 |  |
| SB_CERT_ALGORITHM_MLKEM_1024 | id-ml-kem-1024 |  |

## Data Type

String

# fips_mode property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Reserved.

## Syntax

*Rust Syntax*

```text
fn fips_mode(&self ) -> Result<bool, SecureBlackboxError> fn set_fips_mode(&self, value : bool) ->  Option<SecureBlackboxError>
```

## Default Value

false

## Remarks

This property is reserved for future use.

## Data Type

bool

# known_cert_count property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The number of records in the KnownCert arrays.

## Syntax

*Rust Syntax*

```text
fn known_cert_count(&self ) -> Result<i32, SecureBlackboxError> fn set_known_cert_count(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Default Value

0

## Remarks

This property controls the size of the following arrays:

- [known_cert_bytes](#known_cert_bytes-property-ftpclient-struct)
- [known_cert_handle](#known_cert_handle-property-ftpclient-struct)

The array indices start at *0* and end at *known_cert_count - 1*.

## Data Type

i32

# known_cert_bytes property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Returns the raw certificate data in DER format.

## Syntax

*Rust Syntax*

```text
fn known_cert_bytes(&self , KnownCertIndex : i32) -> Result<Vec<u8>, SecureBlackboxError>
```

## Remarks

Returns the raw certificate data in DER format.

The *KnownCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [KnownCertCount](#known_cert_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

Vec

# known_cert_handle property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Allows to get or set a 'handle', a unique identifier of the underlying property object.

## Syntax

*Rust Syntax*

```text
fn known_cert_handle(&self , KnownCertIndex : i32) -> Result<i64, SecureBlackboxError> fn set_known_cert_handle(&self, KnownCertIndex : i32, value : i64) ->  Option<SecureBlackboxError>
```

## Default Value

0

## Remarks

Allows to get or set a 'handle', a unique identifier of the underlying property object. Use this property to assign objects of the same type in a quicker manner, without copying them fieldwise.

When you pass a handle of one object to another, the source object is copied to the destination rather than assigned. It is safe to get rid of the original object after such operation.

```text
  pdfSigner.setSigningCertHandle(certMgr.getCertHandle());
```

The *KnownCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [KnownCertCount](#known_cert_count-property-ftpclient-struct) property.

## Data Type

i64

# known_crl_count property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The number of records in the KnownCRL arrays.

## Syntax

*Rust Syntax*

```text
fn known_crl_count(&self ) -> Result<i32, SecureBlackboxError> fn set_known_crl_count(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Default Value

0

## Remarks

This property controls the size of the following arrays:

- [known_crl_bytes](#known_crl_bytes-property-ftpclient-struct)
- [known_crl_handle](#known_crl_handle-property-ftpclient-struct)

The array indices start at *0* and end at *known_crl_count - 1*.

## Data Type

i32

# known_crl_bytes property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Returns the raw CRL data in DER format.

## Syntax

*Rust Syntax*

```text
fn known_crl_bytes(&self , KnownCRLIndex : i32) -> Result<Vec<u8>, SecureBlackboxError>
```

## Remarks

Returns the raw CRL data in DER format.

The *KnownCRLIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [KnownCRLCount](#known_crl_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

Vec

# known_crl_handle property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Allows to get or set a 'handle', a unique identifier of the underlying property object.

## Syntax

*Rust Syntax*

```text
fn known_crl_handle(&self , KnownCRLIndex : i32) -> Result<i64, SecureBlackboxError> fn set_known_crl_handle(&self, KnownCRLIndex : i32, value : i64) ->  Option<SecureBlackboxError>
```

## Default Value

0

## Remarks

Allows to get or set a 'handle', a unique identifier of the underlying property object. Use this property to assign objects of the same type in a quicker manner, without copying them fieldwise.

When you pass a handle of one object to another, the source object is copied to the destination rather than assigned. It is safe to get rid of the original object after such operation.

```text
  pdfSigner.setSigningCertHandle(certMgr.getCertHandle());
```

The *KnownCRLIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [KnownCRLCount](#known_crl_count-property-ftpclient-struct) property.

## Data Type

i64

# known_ocsp_count property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The number of records in the KnownOCSP arrays.

## Syntax

*Rust Syntax*

```text
fn known_ocsp_count(&self ) -> Result<i32, SecureBlackboxError> fn set_known_ocsp_count(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Default Value

0

## Remarks

This property controls the size of the following arrays:

- [known_ocsp_bytes](#known_ocsp_bytes-property-ftpclient-struct)
- [known_ocsp_handle](#known_ocsp_handle-property-ftpclient-struct)

The array indices start at *0* and end at *known_ocsp_count - 1*.

## Data Type

i32

# known_ocsp_bytes property ([FTPClient](#struct-secureblackboxftpclient) Struct)

A buffer containing the raw OCSP response data.

## Syntax

*Rust Syntax*

```text
fn known_ocsp_bytes(&self , KnownOCSPIndex : i32) -> Result<Vec<u8>, SecureBlackboxError>
```

## Remarks

A buffer containing the raw OCSP response data.

The *KnownOCSPIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [KnownOCSPCount](#known_ocsp_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

Vec

# known_ocsp_handle property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Allows to get or set a 'handle', a unique identifier of the underlying property object.

## Syntax

*Rust Syntax*

```text
fn known_ocsp_handle(&self , KnownOCSPIndex : i32) -> Result<i64, SecureBlackboxError> fn set_known_ocsp_handle(&self, KnownOCSPIndex : i32, value : i64) ->  Option<SecureBlackboxError>
```

## Default Value

0

## Remarks

Allows to get or set a 'handle', a unique identifier of the underlying property object. Use this property to assign objects of the same type in a quicker manner, without copying them fieldwise.

When you pass a handle of one object to another, the source object is copied to the destination rather than assigned. It is safe to get rid of the original object after such operation.

```text
  pdfSigner.setSigningCertHandle(certMgr.getCertHandle());
```

The *KnownOCSPIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [KnownOCSPCount](#known_ocsp_count-property-ftpclient-struct) property.

## Data Type

i64

# mode_z property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Switches on data compression.

## Syntax

*Rust Syntax*

```text
fn mode_z(&self ) -> Result<bool, SecureBlackboxError> fn set_mode_z(&self, value : bool) ->  Option<SecureBlackboxError>
```

## Default Value

true

## Remarks

Switches the in-flight data compression on/off.

## Data Type

bool

# passive_mode property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Enables or disables passive transfer mode.

## Syntax

*Rust Syntax*

```text
fn passive_mode(&self ) -> Result<bool, SecureBlackboxError> fn set_passive_mode(&self, value : bool) ->  Option<SecureBlackboxError>
```

## Default Value

true

## Remarks

The transfer mode (active or passive) regulates which party is responsible for opening a listening port for data connections. Where passive mode is used, the FTP server is responsible for listening for data connections. In active mode, the listening port is opened by the client.

In today's Internet of firewalls it is a de-facto standard to use the passive mode for FTP transfers.

## Data Type

bool

# password property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The connecting user's authentication password.

## Syntax

*Rust Syntax*

```text
fn password(&self ) -> Result<String, SecureBlackboxError> fn set_password(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_password_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

Assign the user's authentication password to this property. Use [username](#username-property-ftpclient-struct) for username/login.

## Data Type

String

# proxy_address property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The IP address of the proxy server.

## Syntax

*Rust Syntax*

```text
fn proxy_address(&self ) -> Result<String, SecureBlackboxError> fn set_proxy_address(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_proxy_address_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

The IP address of the proxy server.

## Data Type

String

# proxy_authentication property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The authentication type used by the proxy server.

## Syntax

*Rust Syntax*

```text
fn proxy_authentication(&self ) -> Result<i32, SecureBlackboxError> fn set_proxy_authentication(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Possible Values

```text
0   // NoAuthentication1   // Basic2   // Digest3   // NTLM
```

## Default Value

0

## Remarks

The authentication type used by the proxy server.

|  |  |
| --- | --- |
| patNoAuthentication | 0 |
| patBasic | 1 |
| patDigest | 2 |
| patNTLM | 3 |

## Data Type

i32

# proxy_password property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The password to authenticate to the proxy server.

## Syntax

*Rust Syntax*

```text
fn proxy_password(&self ) -> Result<String, SecureBlackboxError> fn set_proxy_password(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_proxy_password_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

The password to authenticate to the proxy server.

## Data Type

String

# proxy_port property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The port on the proxy server to connect to.

## Syntax

*Rust Syntax*

```text
fn proxy_port(&self ) -> Result<i32, SecureBlackboxError> fn set_proxy_port(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Default Value

0

## Remarks

The port on the proxy server to connect to.

## Data Type

i32

# proxy_type property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The type of the proxy server.

## Syntax

*Rust Syntax*

```text
fn proxy_type(&self ) -> Result<i32, SecureBlackboxError> fn set_proxy_type(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Possible Values

```text
0   // None1   // Socks42   // Socks53   // WebTunnel4   // HTTP
```

## Default Value

0

## Remarks

The type of the proxy server.

|  |  |
| --- | --- |
| cptNone | 0 |
| cptSocks4 | 1 |
| cptSocks5 | 2 |
| cptWebTunnel | 3 |
| cptHTTP | 4 |

## Data Type

i32

# proxy_request_headers property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Contains HTTP request headers for WebTunnel and HTTP proxy.

## Syntax

*Rust Syntax*

```text
fn proxy_request_headers(&self ) -> Result<String, SecureBlackboxError> fn set_proxy_request_headers(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_proxy_request_headers_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

Contains HTTP request headers for WebTunnel and HTTP proxy.

## Data Type

String

# proxy_response_body property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Contains the HTTP or HTTPS (WebTunnel) proxy response body.

## Syntax

*Rust Syntax*

```text
fn proxy_response_body(&self ) -> Result<String, SecureBlackboxError> fn set_proxy_response_body(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_proxy_response_body_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

Contains the HTTP or HTTPS (WebTunnel) proxy response body.

## Data Type

String

# proxy_response_headers property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Contains response headers received from an HTTP or HTTPS (WebTunnel) proxy server.

## Syntax

*Rust Syntax*

```text
fn proxy_response_headers(&self ) -> Result<String, SecureBlackboxError> fn set_proxy_response_headers(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_proxy_response_headers_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

Contains response headers received from an HTTP or HTTPS (WebTunnel) proxy server.

## Data Type

String

# proxy_use_ipv6 property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Specifies whether IPv6 should be used when connecting through the proxy.

## Syntax

*Rust Syntax*

```text
fn proxy_use_ipv6(&self ) -> Result<bool, SecureBlackboxError> fn set_proxy_use_ipv6(&self, value : bool) ->  Option<SecureBlackboxError>
```

## Default Value

false

## Remarks

Specifies whether IPv6 should be used when connecting through the proxy.

## Data Type

bool

# proxy_username property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Specifies the username credential for proxy authentication.

## Syntax

*Rust Syntax*

```text
fn proxy_username(&self ) -> Result<String, SecureBlackboxError> fn set_proxy_username(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_proxy_username_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

Specifies the username credential for proxy authentication.

## Data Type

String

# restart_at property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The offset to restart the file transfer from.

## Syntax

*Rust Syntax*

```text
fn restart_at(&self ) -> Result<i64, SecureBlackboxError> fn set_restart_at(&self, value : i64) ->  Option<SecureBlackboxError>
```

## Default Value

-1

## Remarks

If non-zero, tells the component to restart the file transfer operation at the specified position, rather than transfer the file in full.

## Data Type

i64

# socket_dns_mode property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Selects the DNS resolver to use: the struct's (secure) built-in one, or the one provided by the system.

## Syntax

*Rust Syntax*

```text
fn socket_dns_mode(&self ) -> Result<i32, SecureBlackboxError> fn set_socket_dns_mode(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Possible Values

```text
0   // Auto1   // Platform2   // Own3   // OwnSecure
```

## Default Value

0

## Remarks

Selects the DNS resolver to use: the component's (secure) built-in one, or the one provided by the system.

|  |  |
| --- | --- |
| dmAuto | 0 |
| dmPlatform | 1 |
| dmOwn | 2 |
| dmOwnSecure | 3 |

## Data Type

i32

# socket_dns_port property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Specifies the port number to be used for sending queries to the DNS server.

## Syntax

*Rust Syntax*

```text
fn socket_dns_port(&self ) -> Result<i32, SecureBlackboxError> fn set_socket_dns_port(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Default Value

0

## Remarks

Specifies the port number to be used for sending queries to the DNS server.

## Data Type

i32

# socket_dns_query_timeout property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The timeout (in milliseconds) for each DNS query.

## Syntax

*Rust Syntax*

```text
fn socket_dns_query_timeout(&self ) -> Result<i32, SecureBlackboxError> fn set_socket_dns_query_timeout(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Default Value

0

## Remarks

The timeout (in milliseconds) for each DNS query. The value of 0 indicates an infinite timeout.

## Data Type

i32

# socket_dns_servers property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The addresses of DNS servers to use for address resolution, separated by commas or semicolons.

## Syntax

*Rust Syntax*

```text
fn socket_dns_servers(&self ) -> Result<String, SecureBlackboxError> fn set_socket_dns_servers(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_socket_dns_servers_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

The addresses of DNS servers to use for address resolution, separated by commas or semicolons.

## Data Type

String

# socket_dns_total_timeout property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The timeout (in milliseconds) for the whole resolution process.

## Syntax

*Rust Syntax*

```text
fn socket_dns_total_timeout(&self ) -> Result<i32, SecureBlackboxError> fn set_socket_dns_total_timeout(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Default Value

0

## Remarks

The timeout (in milliseconds) for the whole resolution process. The value of 0 indicates an infinite timeout.

## Data Type

i32

# socket_incoming_speed_limit property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The maximum number of bytes to read from the socket, per second.

## Syntax

*Rust Syntax*

```text
fn socket_incoming_speed_limit(&self ) -> Result<i32, SecureBlackboxError> fn set_socket_incoming_speed_limit(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Default Value

0

## Remarks

The maximum number of bytes to read from the socket, per second.

## Data Type

i32

# socket_local_address property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The local network interface to bind the socket to.

## Syntax

*Rust Syntax*

```text
fn socket_local_address(&self ) -> Result<String, SecureBlackboxError> fn set_socket_local_address(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_socket_local_address_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

The local network interface to bind the socket to.

## Data Type

String

# socket_local_port property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The local port number to bind the socket to.

## Syntax

*Rust Syntax*

```text
fn socket_local_port(&self ) -> Result<i32, SecureBlackboxError> fn set_socket_local_port(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Default Value

0

## Remarks

The local port number to bind the socket to.

## Data Type

i32

# socket_outgoing_speed_limit property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The maximum number of bytes to write to the socket, per second.

## Syntax

*Rust Syntax*

```text
fn socket_outgoing_speed_limit(&self ) -> Result<i32, SecureBlackboxError> fn set_socket_outgoing_speed_limit(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Default Value

0

## Remarks

The maximum number of bytes to write to the socket, per second.

## Data Type

i32

# socket_timeout property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The maximum period of waiting, in milliseconds, after which the socket operation is considered unsuccessful.

## Syntax

*Rust Syntax*

```text
fn socket_timeout(&self ) -> Result<i32, SecureBlackboxError> fn set_socket_timeout(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Default Value

60000

## Remarks

The maximum period of waiting, in milliseconds, after which the socket operation is considered unsuccessful.

If *Timeout* is set to 0, a socket operation will expire after the system-default timeout (2 hrs 8 min for TCP stack).

## Data Type

i32

# socket_use_ipv6 property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Enables or disables IP protocol version 6.

## Syntax

*Rust Syntax*

```text
fn socket_use_ipv6(&self ) -> Result<bool, SecureBlackboxError> fn set_socket_use_ipv6(&self, value : bool) ->  Option<SecureBlackboxError>
```

## Default Value

false

## Remarks

Enables or disables IP protocol version 6.

## Data Type

bool

# tls_client_cert_count property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The number of records in the TLSClientCert arrays.

## Syntax

*Rust Syntax*

```text
fn tls_client_cert_count(&self ) -> Result<i32, SecureBlackboxError> fn set_tls_client_cert_count(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Default Value

0

## Remarks

This property controls the size of the following arrays:

- [tls_client_cert_bytes](#tls_client_cert_bytes-property-ftpclient-struct)
- [tls_client_cert_handle](#tls_client_cert_handle-property-ftpclient-struct)

The array indices start at *0* and end at *tls_client_cert_count - 1*.

## Data Type

i32

# tls_client_cert_bytes property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Returns the raw certificate data in DER format.

## Syntax

*Rust Syntax*

```text
fn tls_client_cert_bytes(&self , TLSClientCertIndex : i32) -> Result<Vec<u8>, SecureBlackboxError>
```

## Remarks

Returns the raw certificate data in DER format.

The *TLSClientCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [TLSClientCertCount](#tls_client_cert_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

Vec

# tls_client_cert_handle property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Allows to get or set a 'handle', a unique identifier of the underlying property object.

## Syntax

*Rust Syntax*

```text
fn tls_client_cert_handle(&self , TLSClientCertIndex : i32) -> Result<i64, SecureBlackboxError> fn set_tls_client_cert_handle(&self, TLSClientCertIndex : i32, value : i64) ->  Option<SecureBlackboxError>
```

## Default Value

0

## Remarks

Allows to get or set a 'handle', a unique identifier of the underlying property object. Use this property to assign objects of the same type in a quicker manner, without copying them fieldwise.

When you pass a handle of one object to another, the source object is copied to the destination rather than assigned. It is safe to get rid of the original object after such operation.

```text
  pdfSigner.setSigningCertHandle(certMgr.getCertHandle());
```

The *TLSClientCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [TLSClientCertCount](#tls_client_cert_count-property-ftpclient-struct) property.

## Data Type

i64

# tls_server_cert_count property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The number of records in the TLSServerCert arrays.

## Syntax

*Rust Syntax*

```text
fn tls_server_cert_count(&self ) -> Result<i32, SecureBlackboxError>
```

## Default Value

0

## Remarks

This property controls the size of the following arrays:

- [tls_server_cert_bytes](#tls_server_cert_bytes-property-ftpclient-struct)
- [tls_server_cert_fingerprint](#tls_server_cert_fingerprint-property-ftpclient-struct)
- [tls_server_cert_handle](#tls_server_cert_handle-property-ftpclient-struct)
- [tls_server_cert_issuer](#tls_server_cert_issuer-property-ftpclient-struct)
- [tls_server_cert_issuer_rdn](#tls_server_cert_issuer_rdn-property-ftpclient-struct)
- [tls_server_cert_key_algorithm](#tls_server_cert_key_algorithm-property-ftpclient-struct)
- [tls_server_cert_key_bits](#tls_server_cert_key_bits-property-ftpclient-struct)
- [tls_server_cert_key_usage](#tls_server_cert_key_usage-property-ftpclient-struct)
- [tls_server_cert_self_signed](#tls_server_cert_self_signed-property-ftpclient-struct)
- [tls_server_cert_serial_number](#tls_server_cert_serial_number-property-ftpclient-struct)
- [tls_server_cert_sig_algorithm](#tls_server_cert_sig_algorithm-property-ftpclient-struct)
- [tls_server_cert_subject](#tls_server_cert_subject-property-ftpclient-struct)
- [tls_server_cert_subject_rdn](#tls_server_cert_subject_rdn-property-ftpclient-struct)
- [tls_server_cert_valid_from](#tls_server_cert_valid_from-property-ftpclient-struct)
- [tls_server_cert_valid_to](#tls_server_cert_valid_to-property-ftpclient-struct)

The array indices start at *0* and end at *tls_server_cert_count - 1*.

This property is read-only.

## Data Type

i32

# tls_server_cert_bytes property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Returns the raw certificate data in DER format.

## Syntax

*Rust Syntax*

```text
fn tls_server_cert_bytes(&self , TLSServerCertIndex : i32) -> Result<Vec<u8>, SecureBlackboxError>
```

## Remarks

Returns the raw certificate data in DER format.

The *TLSServerCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [TLSServerCertCount](#tls_server_cert_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

Vec

# tls_server_cert_fingerprint property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Contains the fingerprint (a hash imprint) of this certificate.

## Syntax

*Rust Syntax*

```text
fn tls_server_cert_fingerprint(&self , TLSServerCertIndex : i32) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

Contains the fingerprint (a hash imprint) of this certificate.

While there is no formal standard defining what a fingerprint is, a SHA1 hash of the certificate's DER-encoded body is typically used.

The *TLSServerCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [TLSServerCertCount](#tls_server_cert_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

String

# tls_server_cert_handle property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Allows to get or set a 'handle', a unique identifier of the underlying property object.

## Syntax

*Rust Syntax*

```text
fn tls_server_cert_handle(&self , TLSServerCertIndex : i32) -> Result<i64, SecureBlackboxError>
```

## Default Value

0

## Remarks

Allows to get or set a 'handle', a unique identifier of the underlying property object. Use this property to assign objects of the same type in a quicker manner, without copying them fieldwise.

When you pass a handle of one object to another, the source object is copied to the destination rather than assigned. It is safe to get rid of the original object after such operation.

```text
  pdfSigner.setSigningCertHandle(certMgr.getCertHandle());
```

The *TLSServerCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [TLSServerCertCount](#tls_server_cert_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

i64

# tls_server_cert_issuer property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The common name of the certificate issuer (CA), typically a company name.

## Syntax

*Rust Syntax*

```text
fn tls_server_cert_issuer(&self , TLSServerCertIndex : i32) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The common name of the certificate issuer (CA), typically a company name. This is part of a larger set of credentials available via [tls_issuer_rdn](#FTPClient_p_TLSIssuerRDN).

The *TLSServerCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [TLSServerCertCount](#tls_server_cert_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

String

# tls_server_cert_issuer_rdn property ([FTPClient](#struct-secureblackboxftpclient) Struct)

A list of Property=Value pairs that uniquely identify the certificate issuer.

## Syntax

*Rust Syntax*

```text
fn tls_server_cert_issuer_rdn(&self , TLSServerCertIndex : i32) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

A list of *Property=Value* pairs that uniquely identify the certificate issuer.

Example: */C=US/O=Nationwide CA/CN=Web Certification Authority*

The *TLSServerCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [TLSServerCertCount](#tls_server_cert_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

String

# tls_server_cert_key_algorithm property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Specifies the public key algorithm of this certificate.

## Syntax

*Rust Syntax*

```text
fn tls_server_cert_key_algorithm(&self , TLSServerCertIndex : i32) -> Result<String, SecureBlackboxError>
```

## Default Value

"0"

## Remarks

Specifies the public key algorithm of this certificate.

|  |  |  |
| --- | --- | --- |
| SB_CERT_ALGORITHM_ID_RSA_ENCRYPTION | rsaEncryption |  |
| SB_CERT_ALGORITHM_MD2_RSA_ENCRYPTION | md2withRSAEncryption |  |
| SB_CERT_ALGORITHM_MD5_RSA_ENCRYPTION | md5withRSAEncryption |  |
| SB_CERT_ALGORITHM_SHA1_RSA_ENCRYPTION | sha1withRSAEncryption |  |
| SB_CERT_ALGORITHM_ID_DSA | id-dsa |  |
| SB_CERT_ALGORITHM_ID_DSA_SHA1 | id-dsa-with-sha1 |  |
| SB_CERT_ALGORITHM_DH_PUBLIC | dhpublicnumber |  |
| SB_CERT_ALGORITHM_SHA224_RSA_ENCRYPTION | sha224WithRSAEncryption |  |
| SB_CERT_ALGORITHM_SHA256_RSA_ENCRYPTION | sha256WithRSAEncryption |  |
| SB_CERT_ALGORITHM_SHA384_RSA_ENCRYPTION | sha384WithRSAEncryption |  |
| SB_CERT_ALGORITHM_SHA512_RSA_ENCRYPTION | sha512WithRSAEncryption |  |
| SB_CERT_ALGORITHM_ID_RSAPSS | id-RSASSA-PSS |  |
| SB_CERT_ALGORITHM_ID_RSAOAEP | id-RSAES-OAEP |  |
| SB_CERT_ALGORITHM_RSASIGNATURE_RIPEMD160 | ripemd160withRSA |  |
| SB_CERT_ALGORITHM_ID_ELGAMAL | elGamal |  |
| SB_CERT_ALGORITHM_SHA1_ECDSA | ecdsa-with-SHA1 |  |
| SB_CERT_ALGORITHM_RECOMMENDED_ECDSA | ecdsa-recommended |  |
| SB_CERT_ALGORITHM_SHA224_ECDSA | ecdsa-with-SHA224 |  |
| SB_CERT_ALGORITHM_SHA256_ECDSA | ecdsa-with-SHA256 |  |
| SB_CERT_ALGORITHM_SHA384_ECDSA | ecdsa-with-SHA384 |  |
| SB_CERT_ALGORITHM_SHA512_ECDSA | ecdsa-with-SHA512 |  |
| SB_CERT_ALGORITHM_EC | id-ecPublicKey |  |
| SB_CERT_ALGORITHM_SPECIFIED_ECDSA | ecdsa-specified |  |
| SB_CERT_ALGORITHM_GOST_R3410_1994 | id-GostR3410-94 |  |
| SB_CERT_ALGORITHM_GOST_R3410_2001 | id-GostR3410-2001 |  |
| SB_CERT_ALGORITHM_GOST_R3411_WITH_R3410_1994 | id-GostR3411-94-with-GostR3410-94 |  |
| SB_CERT_ALGORITHM_GOST_R3411_WITH_R3410_2001 | id-GostR3411-94-with-GostR3410-2001 |  |
| SB_CERT_ALGORITHM_SHA1_ECDSA_PLAIN | ecdsa-plain-SHA1 |  |
| SB_CERT_ALGORITHM_SHA224_ECDSA_PLAIN | ecdsa-plain-SHA224 |  |
| SB_CERT_ALGORITHM_SHA256_ECDSA_PLAIN | ecdsa-plain-SHA256 |  |
| SB_CERT_ALGORITHM_SHA384_ECDSA_PLAIN | ecdsa-plain-SHA384 |  |
| SB_CERT_ALGORITHM_SHA512_ECDSA_PLAIN | ecdsa-plain-SHA512 |  |
| SB_CERT_ALGORITHM_RIPEMD160_ECDSA_PLAIN | ecdsa-plain-RIPEMD160 |  |
| SB_CERT_ALGORITHM_WHIRLPOOL_RSA_ENCRYPTION | whirlpoolWithRSAEncryption |  |
| SB_CERT_ALGORITHM_ID_DSA_SHA224 | id-dsa-with-sha224 |  |
| SB_CERT_ALGORITHM_ID_DSA_SHA256 | id-dsa-with-sha256 |  |
| SB_CERT_ALGORITHM_SHA3_224_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-sha3-224 |  |
| SB_CERT_ALGORITHM_SHA3_256_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-sha3-256 |  |
| SB_CERT_ALGORITHM_SHA3_384_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-sha3-384 |  |
| SB_CERT_ALGORITHM_SHA3_512_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-sha3-512 |  |
| SB_CERT_ALGORITHM_SHA3_224_ECDSA | id-ecdsa-with-sha3-224 |  |
| SB_CERT_ALGORITHM_SHA3_256_ECDSA | id-ecdsa-with-sha3-256 |  |
| SB_CERT_ALGORITHM_SHA3_384_ECDSA | id-ecdsa-with-sha3-384 |  |
| SB_CERT_ALGORITHM_SHA3_512_ECDSA | id-ecdsa-with-sha3-512 |  |
| SB_CERT_ALGORITHM_SHA3_224_ECDSA_PLAIN | id-ecdsa-plain-with-sha3-224 |  |
| SB_CERT_ALGORITHM_SHA3_256_ECDSA_PLAIN | id-ecdsa-plain-with-sha3-256 |  |
| SB_CERT_ALGORITHM_SHA3_384_ECDSA_PLAIN | id-ecdsa-plain-with-sha3-384 |  |
| SB_CERT_ALGORITHM_SHA3_512_ECDSA_PLAIN | id-ecdsa-plain-with-sha3-512 |  |
| SB_CERT_ALGORITHM_ID_DSA_SHA3_224 | id-dsa-with-sha3-224 |  |
| SB_CERT_ALGORITHM_ID_DSA_SHA3_256 | id-dsa-with-sha3-256 |  |
| SB_CERT_ALGORITHM_BLAKE2S_128_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-blake2s128 |  |
| SB_CERT_ALGORITHM_BLAKE2S_160_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-blake2s160 |  |
| SB_CERT_ALGORITHM_BLAKE2S_224_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-blake2s224 |  |
| SB_CERT_ALGORITHM_BLAKE2S_256_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-blake2s256 |  |
| SB_CERT_ALGORITHM_BLAKE2B_160_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-blake2b160 |  |
| SB_CERT_ALGORITHM_BLAKE2B_256_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-blake2b256 |  |
| SB_CERT_ALGORITHM_BLAKE2B_384_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-blake2b384 |  |
| SB_CERT_ALGORITHM_BLAKE2B_512_RSA_ENCRYPTION | id-rsassa-pkcs1-v1_5-with-blake2b512 |  |
| SB_CERT_ALGORITHM_BLAKE2S_128_ECDSA | id-ecdsa-with-blake2s128 |  |
| SB_CERT_ALGORITHM_BLAKE2S_160_ECDSA | id-ecdsa-with-blake2s160 |  |
| SB_CERT_ALGORITHM_BLAKE2S_224_ECDSA | id-ecdsa-with-blake2s224 |  |
| SB_CERT_ALGORITHM_BLAKE2S_256_ECDSA | id-ecdsa-with-blake2s256 |  |
| SB_CERT_ALGORITHM_BLAKE2B_160_ECDSA | id-ecdsa-with-blake2b160 |  |
| SB_CERT_ALGORITHM_BLAKE2B_256_ECDSA | id-ecdsa-with-blake2b256 |  |
| SB_CERT_ALGORITHM_BLAKE2B_384_ECDSA | id-ecdsa-with-blake2b384 |  |
| SB_CERT_ALGORITHM_BLAKE2B_512_ECDSA | id-ecdsa-with-blake2b512 |  |
| SB_CERT_ALGORITHM_BLAKE2S_128_ECDSA_PLAIN | id-ecdsa-plain-with-blake2s128 |  |
| SB_CERT_ALGORITHM_BLAKE2S_160_ECDSA_PLAIN | id-ecdsa-plain-with-blake2s160 |  |
| SB_CERT_ALGORITHM_BLAKE2S_224_ECDSA_PLAIN | id-ecdsa-plain-with-blake2s224 |  |
| SB_CERT_ALGORITHM_BLAKE2S_256_ECDSA_PLAIN | id-ecdsa-plain-with-blake2s256 |  |
| SB_CERT_ALGORITHM_BLAKE2B_160_ECDSA_PLAIN | id-ecdsa-plain-with-blake2b160 |  |
| SB_CERT_ALGORITHM_BLAKE2B_256_ECDSA_PLAIN | id-ecdsa-plain-with-blake2b256 |  |
| SB_CERT_ALGORITHM_BLAKE2B_384_ECDSA_PLAIN | id-ecdsa-plain-with-blake2b384 |  |
| SB_CERT_ALGORITHM_BLAKE2B_512_ECDSA_PLAIN | id-ecdsa-plain-with-blake2b512 |  |
| SB_CERT_ALGORITHM_ID_DSA_BLAKE2S_224 | id-dsa-with-blake2s224 |  |
| SB_CERT_ALGORITHM_ID_DSA_BLAKE2S_256 | id-dsa-with-blake2s256 |  |
| SB_CERT_ALGORITHM_EDDSA_ED25519 | id-Ed25519 |  |
| SB_CERT_ALGORITHM_EDDSA_ED448 | id-Ed448 |  |
| SB_CERT_ALGORITHM_EDDSA_ED25519_PH | id-Ed25519ph |  |
| SB_CERT_ALGORITHM_EDDSA_ED448_PH | id-Ed448ph |  |
| SB_CERT_ALGORITHM_EDDSA | id-EdDSA |  |
| SB_CERT_ALGORITHM_EDDSA_SIGNATURE | id-EdDSA-sig |  |
| SB_CERT_ALGORITHM_MLDSA_44 | id-ml-dsa-44 |  |
| SB_CERT_ALGORITHM_MLDSA_65 | id-ml-dsa-65 |  |
| SB_CERT_ALGORITHM_MLDSA_87 | id-ml-dsa-87 |  |
| SB_CERT_ALGORITHM_HASH_MLDSA_44_SHA512 | id-hash-ml-dsa-44-with-sha512 |  |
| SB_CERT_ALGORITHM_HASH_MLDSA_65_SHA512 | id-hash-ml-dsa-65-with-sha512 |  |
| SB_CERT_ALGORITHM_HASH_MLDSA_87_SHA512 | id-hash-ml-dsa-87-with-sha512 |  |
| SB_CERT_ALGORITHM_MLKEM_512 | id-ml-kem-512 |  |
| SB_CERT_ALGORITHM_MLKEM_768 | id-ml-kem-768 |  |
| SB_CERT_ALGORITHM_MLKEM_1024 | id-ml-kem-1024 |  |

Use the [tls_key_bits](#FTPClient_p_TLSKeyBits), [tls_curve](#FTPClient_p_TLSCurve), and [tls_public_key_bytes](#FTPClient_p_TLSPublicKeyBytes) properties to get more details about the key the certificate contains.

The *TLSServerCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [TLSServerCertCount](#tls_server_cert_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

String

# tls_server_cert_key_bits property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Returns the length of the public key in bits.

## Syntax

*Rust Syntax*

```text
fn tls_server_cert_key_bits(&self , TLSServerCertIndex : i32) -> Result<i32, SecureBlackboxError>
```

## Default Value

0

## Remarks

Returns the length of the public key in bits.

This value indicates the length of the principal cryptographic parameter of the key, such as the length of the RSA modulus or ECDSA field. The key data returned by the [tls_public_key_bytes](#FTPClient_p_TLSPublicKeyBytes) or [tls_private_key_bytes](#FTPClient_p_TLSPrivateKeyBytes) property would typically contain auxiliary values, and therefore be longer.

The *TLSServerCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [TLSServerCertCount](#tls_server_cert_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

i32

# tls_server_cert_key_usage property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Indicates the purposes of the key contained in the certificate, in the form of an OR'ed flag set.

## Syntax

*Rust Syntax*

```text
fn tls_server_cert_key_usage(&self , TLSServerCertIndex : i32) -> Result<i32, SecureBlackboxError>
```

## Default Value

0

## Remarks

Indicates the purposes of the key contained in the certificate, in the form of an OR'ed flag set.

This value is a bit mask of the following values:

|  |  |  |
| --- | --- | --- |
| ckuUnknown | 0x00000 | Unknown key usage |
| ckuDigitalSignature | 0x00001 | Digital signature |
| ckuNonRepudiation | 0x00002 | Non-repudiation |
| ckuKeyEncipherment | 0x00004 | Key encipherment |
| ckuDataEncipherment | 0x00008 | Data encipherment |
| ckuKeyAgreement | 0x00010 | Key agreement |
| ckuKeyCertSign | 0x00020 | Certificate signing |
| ckuCRLSign | 0x00040 | Revocation signing |
| ckuEncipherOnly | 0x00080 | Encipher only |
| ckuDecipherOnly | 0x00100 | Decipher only |
| ckuServerAuthentication | 0x00200 | Server authentication |
| ckuClientAuthentication | 0x00400 | Client authentication |
| ckuCodeSigning | 0x00800 | Code signing |
| ckuEmailProtection | 0x01000 | Email protection |
| ckuTimeStamping | 0x02000 | Timestamping |
| ckuOCSPSigning | 0x04000 | OCSP signing |
| ckuSmartCardLogon | 0x08000 | Smartcard logon |
| ckuKeyPurposeClientAuth | 0x10000 | Kerberos - client authentication |
| ckuKeyPurposeKDC | 0x20000 | Kerberos - KDC |

Set this property before generating the certificate to propagate the key usage flags to the new certificate.

The *TLSServerCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [TLSServerCertCount](#tls_server_cert_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

i32

# tls_server_cert_self_signed property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Indicates whether the certificate is self-signed (root) or signed by an external CA.

## Syntax

*Rust Syntax*

```text
fn tls_server_cert_self_signed(&self , TLSServerCertIndex : i32) -> Result<bool, SecureBlackboxError>
```

## Default Value

false

## Remarks

Indicates whether the certificate is self-signed (root) or signed by an external CA.

The *TLSServerCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [TLSServerCertCount](#tls_server_cert_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

bool

# tls_server_cert_serial_number property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Returns the certificate's serial number.

## Syntax

*Rust Syntax*

```text
fn tls_server_cert_serial_number(&self , TLSServerCertIndex : i32) -> Result<Vec<u8>, SecureBlackboxError>
```

## Remarks

Returns the certificate's serial number.

The serial number is a binary string that uniquely identifies a certificate among others issued by the same CA. According to the X.509 standard, the (issuer, serial number) pair should be globally unique to facilitate chain building.

The *TLSServerCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [TLSServerCertCount](#tls_server_cert_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

Vec

# tls_server_cert_sig_algorithm property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Indicates the algorithm that was used by the CA to sign this certificate.

## Syntax

*Rust Syntax*

```text
fn tls_server_cert_sig_algorithm(&self , TLSServerCertIndex : i32) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

Indicates the algorithm that was used by the CA to sign this certificate.

A signature algorithm typically combines hash and public key algorithms together, such as *sha256WithRSAEncryption* or *ecdsa-with-SHA256*.

The *TLSServerCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [TLSServerCertCount](#tls_server_cert_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

String

# tls_server_cert_subject property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The common name of the certificate holder, typically an individual's name, a URL, an e-mail address, or a company name.

## Syntax

*Rust Syntax*

```text
fn tls_server_cert_subject(&self , TLSServerCertIndex : i32) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The common name of the certificate holder, typically an individual's name, a URL, an e-mail address, or a company name. This is part of a larger set of credentials available via [tls_subject_rdn](#FTPClient_p_TLSSubjectRDN).

The *TLSServerCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [TLSServerCertCount](#tls_server_cert_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

String

# tls_server_cert_subject_rdn property ([FTPClient](#struct-secureblackboxftpclient) Struct)

A list of Property=Value pairs that uniquely identify the certificate holder (subject).

## Syntax

*Rust Syntax*

```text
fn tls_server_cert_subject_rdn(&self , TLSServerCertIndex : i32) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

A list of *Property=Value* pairs that uniquely identify the certificate holder (subject).

Depending on the purpose of the certificate and the policies of the CA that issued it, the values included in the subject record may differ drastically and contain business or personal names, web URLs, email addresses, and other data.

Example: */C=US/O=Oranges and Apples, Inc./OU=Accounts Receivable/1.2.3.4.5=Value with unknown OID/CN=Margaret Watkins*.

The *TLSServerCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [TLSServerCertCount](#tls_server_cert_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

String

# tls_server_cert_valid_from property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The time point at which the certificate becomes valid, in UTC.

## Syntax

*Rust Syntax*

```text
fn tls_server_cert_valid_from(&self , TLSServerCertIndex : i32) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The time point at which the certificate becomes valid, in UTC.

The *TLSServerCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [TLSServerCertCount](#tls_server_cert_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

String

# tls_server_cert_valid_to property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The time point at which the certificate expires, in UTC.

## Syntax

*Rust Syntax*

```text
fn tls_server_cert_valid_to(&self , TLSServerCertIndex : i32) -> Result<String, SecureBlackboxError>
```

## Default Value

""

## Remarks

The time point at which the certificate expires, in UTC.

The *TLSServerCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [TLSServerCertCount](#tls_server_cert_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

String

# tls_auto_validate_certificates property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Specifies whether server-side TLS certificates should be validated automatically using internal validation rules.

## Syntax

*Rust Syntax*

```text
fn tls_auto_validate_certificates(&self ) -> Result<bool, SecureBlackboxError> fn set_tls_auto_validate_certificates(&self, value : bool) ->  Option<SecureBlackboxError>
```

## Default Value

true

## Remarks

Specifies whether server-side TLS certificates should be validated automatically using internal validation rules.

## Data Type

bool

# tls_base_configuration property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Selects the base configuration for the TLS settings.

## Syntax

*Rust Syntax*

```text
fn tls_base_configuration(&self ) -> Result<i32, SecureBlackboxError> fn set_tls_base_configuration(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Possible Values

```text
0   // Default1   // Compatible2   // ComprehensiveInsecure3   // HighlySecure
```

## Default Value

0

## Remarks

Selects the base configuration for the TLS settings. Several profiles are offered and tuned up for different purposes, such as high security or higher compatibility.

|  |  |  |
| --- | --- | --- |
| stpcDefault | 0 |  |
| stpcCompatible | 1 |  |
| stpcComprehensiveInsecure | 2 |  |
| stpcHighlySecure | 3 |  |

## Data Type

i32

# tls_ciphersuites property ([FTPClient](#struct-secureblackboxftpclient) Struct)

A list of ciphersuites separated with commas or semicolons.

## Syntax

*Rust Syntax*

```text
fn tls_ciphersuites(&self ) -> Result<String, SecureBlackboxError> fn set_tls_ciphersuites(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_tls_ciphersuites_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

A list of ciphersuites separated with commas or semicolons. Each ciphersuite in the list may be prefixed with a minus sign (-) to indicate that the ciphersuite should be disabled rather than enabled. Besides the specific ciphersuite modifiers, this property supports the *all* (and *-all*) aliases, allowing all ciphersuites to be blanketly enabled or disabled at once.

Note: the list of ciphersuites provided to this property alters the baseline list of ciphersuites as defined by [tls_base_configuration](#tls_base_configuration-property-ftpclient-struct). Remember to start your ciphersuite string with -all; if you need to only enable a specific fixed set of ciphersuites. The list of supported ciphersuites is provided below:

- NULL_NULL_NULL
- RSA_NULL_MD5
- RSA_NULL_SHA
- RSA_RC4_MD5
- RSA_RC4_SHA
- RSA_RC2_MD5
- RSA_IDEA_MD5
- RSA_IDEA_SHA
- RSA_DES_MD5
- RSA_DES_SHA
- RSA_3DES_MD5
- RSA_3DES_SHA
- RSA_AES128_SHA
- RSA_AES256_SHA
- DH_DSS_DES_SHA
- DH_DSS_3DES_SHA
- DH_DSS_AES128_SHA
- DH_DSS_AES256_SHA
- DH_RSA_DES_SHA
- DH_RSA_3DES_SHA
- DH_RSA_AES128_SHA
- DH_RSA_AES256_SHA
- DHE_DSS_DES_SHA
- DHE_DSS_3DES_SHA
- DHE_DSS_AES128_SHA
- DHE_DSS_AES256_SHA
- DHE_RSA_DES_SHA
- DHE_RSA_3DES_SHA
- DHE_RSA_AES128_SHA
- DHE_RSA_AES256_SHA
- DH_ANON_RC4_MD5
- DH_ANON_DES_SHA
- DH_ANON_3DES_SHA
- DH_ANON_AES128_SHA
- DH_ANON_AES256_SHA
- RSA_RC2_MD5_EXPORT
- RSA_RC4_MD5_EXPORT
- RSA_DES_SHA_EXPORT
- DH_DSS_DES_SHA_EXPORT
- DH_RSA_DES_SHA_EXPORT
- DHE_DSS_DES_SHA_EXPORT
- DHE_RSA_DES_SHA_EXPORT
- DH_ANON_RC4_MD5_EXPORT
- DH_ANON_DES_SHA_EXPORT
- RSA_CAMELLIA128_SHA
- DH_DSS_CAMELLIA128_SHA
- DH_RSA_CAMELLIA128_SHA
- DHE_DSS_CAMELLIA128_SHA
- DHE_RSA_CAMELLIA128_SHA
- DH_ANON_CAMELLIA128_SHA
- RSA_CAMELLIA256_SHA
- DH_DSS_CAMELLIA256_SHA
- DH_RSA_CAMELLIA256_SHA
- DHE_DSS_CAMELLIA256_SHA
- DHE_RSA_CAMELLIA256_SHA
- DH_ANON_CAMELLIA256_SHA
- PSK_RC4_SHA
- PSK_3DES_SHA
- PSK_AES128_SHA
- PSK_AES256_SHA
- DHE_PSK_RC4_SHA
- DHE_PSK_3DES_SHA
- DHE_PSK_AES128_SHA
- DHE_PSK_AES256_SHA
- RSA_PSK_RC4_SHA
- RSA_PSK_3DES_SHA
- RSA_PSK_AES128_SHA
- RSA_PSK_AES256_SHA
- RSA_SEED_SHA
- DH_DSS_SEED_SHA
- DH_RSA_SEED_SHA
- DHE_DSS_SEED_SHA
- DHE_RSA_SEED_SHA
- DH_ANON_SEED_SHA
- SRP_SHA_3DES_SHA
- SRP_SHA_RSA_3DES_SHA
- SRP_SHA_DSS_3DES_SHA
- SRP_SHA_AES128_SHA
- SRP_SHA_RSA_AES128_SHA
- SRP_SHA_DSS_AES128_SHA
- SRP_SHA_AES256_SHA
- SRP_SHA_RSA_AES256_SHA
- SRP_SHA_DSS_AES256_SHA
- ECDH_ECDSA_NULL_SHA
- ECDH_ECDSA_RC4_SHA
- ECDH_ECDSA_3DES_SHA
- ECDH_ECDSA_AES128_SHA
- ECDH_ECDSA_AES256_SHA
- ECDHE_ECDSA_NULL_SHA
- ECDHE_ECDSA_RC4_SHA
- ECDHE_ECDSA_3DES_SHA
- ECDHE_ECDSA_AES128_SHA
- ECDHE_ECDSA_AES256_SHA
- ECDH_RSA_NULL_SHA
- ECDH_RSA_RC4_SHA
- ECDH_RSA_3DES_SHA
- ECDH_RSA_AES128_SHA
- ECDH_RSA_AES256_SHA
- ECDHE_RSA_NULL_SHA
- ECDHE_RSA_RC4_SHA
- ECDHE_RSA_3DES_SHA
- ECDHE_RSA_AES128_SHA
- ECDHE_RSA_AES256_SHA
- ECDH_ANON_NULL_SHA
- ECDH_ANON_RC4_SHA
- ECDH_ANON_3DES_SHA
- ECDH_ANON_AES128_SHA
- ECDH_ANON_AES256_SHA
- RSA_NULL_SHA256
- RSA_AES128_SHA256
- RSA_AES256_SHA256
- DH_DSS_AES128_SHA256
- DH_RSA_AES128_SHA256
- DHE_DSS_AES128_SHA256
- DHE_RSA_AES128_SHA256
- DH_DSS_AES256_SHA256
- DH_RSA_AES256_SHA256
- DHE_DSS_AES256_SHA256
- DHE_RSA_AES256_SHA256
- DH_ANON_AES128_SHA256
- DH_ANON_AES256_SHA256
- RSA_AES128_GCM_SHA256
- RSA_AES256_GCM_SHA384
- DHE_RSA_AES128_GCM_SHA256
- DHE_RSA_AES256_GCM_SHA384
- DH_RSA_AES128_GCM_SHA256
- DH_RSA_AES256_GCM_SHA384
- DHE_DSS_AES128_GCM_SHA256
- DHE_DSS_AES256_GCM_SHA384
- DH_DSS_AES128_GCM_SHA256
- DH_DSS_AES256_GCM_SHA384
- DH_ANON_AES128_GCM_SHA256
- DH_ANON_AES256_GCM_SHA384
- ECDHE_ECDSA_AES128_SHA256
- ECDHE_ECDSA_AES256_SHA384
- ECDH_ECDSA_AES128_SHA256
- ECDH_ECDSA_AES256_SHA384
- ECDHE_RSA_AES128_SHA256
- ECDHE_RSA_AES256_SHA384
- ECDH_RSA_AES128_SHA256
- ECDH_RSA_AES256_SHA384
- ECDHE_ECDSA_AES128_GCM_SHA256
- ECDHE_ECDSA_AES256_GCM_SHA384
- ECDH_ECDSA_AES128_GCM_SHA256
- ECDH_ECDSA_AES256_GCM_SHA384
- ECDHE_RSA_AES128_GCM_SHA256
- ECDHE_RSA_AES256_GCM_SHA384
- ECDH_RSA_AES128_GCM_SHA256
- ECDH_RSA_AES256_GCM_SHA384
- PSK_AES128_GCM_SHA256
- PSK_AES256_GCM_SHA384
- DHE_PSK_AES128_GCM_SHA256
- DHE_PSK_AES256_GCM_SHA384
- RSA_PSK_AES128_GCM_SHA256
- RSA_PSK_AES256_GCM_SHA384
- PSK_AES128_SHA256
- PSK_AES256_SHA384
- PSK_NULL_SHA256
- PSK_NULL_SHA384
- DHE_PSK_AES128_SHA256
- DHE_PSK_AES256_SHA384
- DHE_PSK_NULL_SHA256
- DHE_PSK_NULL_SHA384
- RSA_PSK_AES128_SHA256
- RSA_PSK_AES256_SHA384
- RSA_PSK_NULL_SHA256
- RSA_PSK_NULL_SHA384
- RSA_CAMELLIA128_SHA256
- DH_DSS_CAMELLIA128_SHA256
- DH_RSA_CAMELLIA128_SHA256
- DHE_DSS_CAMELLIA128_SHA256
- DHE_RSA_CAMELLIA128_SHA256
- DH_ANON_CAMELLIA128_SHA256
- RSA_CAMELLIA256_SHA256
- DH_DSS_CAMELLIA256_SHA256
- DH_RSA_CAMELLIA256_SHA256
- DHE_DSS_CAMELLIA256_SHA256
- DHE_RSA_CAMELLIA256_SHA256
- DH_ANON_CAMELLIA256_SHA256
- ECDHE_ECDSA_CAMELLIA128_SHA256
- ECDHE_ECDSA_CAMELLIA256_SHA384
- ECDH_ECDSA_CAMELLIA128_SHA256
- ECDH_ECDSA_CAMELLIA256_SHA384
- ECDHE_RSA_CAMELLIA128_SHA256
- ECDHE_RSA_CAMELLIA256_SHA384
- ECDH_RSA_CAMELLIA128_SHA256
- ECDH_RSA_CAMELLIA256_SHA384
- RSA_CAMELLIA128_GCM_SHA256
- RSA_CAMELLIA256_GCM_SHA384
- DHE_RSA_CAMELLIA128_GCM_SHA256
- DHE_RSA_CAMELLIA256_GCM_SHA384
- DH_RSA_CAMELLIA128_GCM_SHA256
- DH_RSA_CAMELLIA256_GCM_SHA384
- DHE_DSS_CAMELLIA128_GCM_SHA256
- DHE_DSS_CAMELLIA256_GCM_SHA384
- DH_DSS_CAMELLIA128_GCM_SHA256
- DH_DSS_CAMELLIA256_GCM_SHA384
- DH_anon_CAMELLIA128_GCM_SHA256
- DH_anon_CAMELLIA256_GCM_SHA384
- ECDHE_ECDSA_CAMELLIA128_GCM_SHA256
- ECDHE_ECDSA_CAMELLIA256_GCM_SHA384
- ECDH_ECDSA_CAMELLIA128_GCM_SHA256
- ECDH_ECDSA_CAMELLIA256_GCM_SHA384
- ECDHE_RSA_CAMELLIA128_GCM_SHA256
- ECDHE_RSA_CAMELLIA256_GCM_SHA384
- ECDH_RSA_CAMELLIA128_GCM_SHA256
- ECDH_RSA_CAMELLIA256_GCM_SHA384
- PSK_CAMELLIA128_GCM_SHA256
- PSK_CAMELLIA256_GCM_SHA384
- DHE_PSK_CAMELLIA128_GCM_SHA256
- DHE_PSK_CAMELLIA256_GCM_SHA384
- RSA_PSK_CAMELLIA128_GCM_SHA256
- RSA_PSK_CAMELLIA256_GCM_SHA384
- PSK_CAMELLIA128_SHA256
- PSK_CAMELLIA256_SHA384
- DHE_PSK_CAMELLIA128_SHA256
- DHE_PSK_CAMELLIA256_SHA384
- RSA_PSK_CAMELLIA128_SHA256
- RSA_PSK_CAMELLIA256_SHA384
- ECDHE_PSK_CAMELLIA128_SHA256
- ECDHE_PSK_CAMELLIA256_SHA384
- ECDHE_PSK_RC4_SHA
- ECDHE_PSK_3DES_SHA
- ECDHE_PSK_AES128_SHA
- ECDHE_PSK_AES256_SHA
- ECDHE_PSK_AES128_SHA256
- ECDHE_PSK_AES256_SHA384
- ECDHE_PSK_NULL_SHA
- ECDHE_PSK_NULL_SHA256
- ECDHE_PSK_NULL_SHA384
- ECDHE_RSA_CHACHA20_POLY1305_SHA256
- ECDHE_ECDSA_CHACHA20_POLY1305_SHA256
- DHE_RSA_CHACHA20_POLY1305_SHA256
- PSK_CHACHA20_POLY1305_SHA256
- ECDHE_PSK_CHACHA20_POLY1305_SHA256
- DHE_PSK_CHACHA20_POLY1305_SHA256
- RSA_PSK_CHACHA20_POLY1305_SHA256
- AES128_GCM_SHA256
- AES256_GCM_SHA384
- CHACHA20_POLY1305_SHA256
- AES128_CCM_SHA256
- AES128_CCM8_SHA256

## Data Type

String

# tls_client_auth property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Enables or disables certificate-based client authentication.

## Syntax

*Rust Syntax*

```text
fn tls_client_auth(&self ) -> Result<i32, SecureBlackboxError> fn set_tls_client_auth(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Possible Values

```text
0   // NoAuth1   // RequestCert2   // RequireCert
```

## Default Value

0

## Remarks

Enables or disables certificate-based client authentication.

Set this property to true to tune up the client authentication type:

|  |  |  |
| --- | --- | --- |
| ccatNoAuth | 0 |  |
| ccatRequestCert | 1 |  |
| ccatRequireCert | 2 |  |

## Data Type

i32

# tls_extensions property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Provides access to TLS extensions.

## Syntax

*Rust Syntax*

```text
fn tls_extensions(&self ) -> Result<String, SecureBlackboxError> fn set_tls_extensions(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_tls_extensions_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

Provides access to TLS extensions.

## Data Type

String

# tls_force_resume_if_destination_changes property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Whether to force TLS session resumption when the destination address changes.

## Syntax

*Rust Syntax*

```text
fn tls_force_resume_if_destination_changes(&self ) -> Result<bool, SecureBlackboxError> fn set_tls_force_resume_if_destination_changes(&self, value : bool) ->  Option<SecureBlackboxError>
```

## Default Value

false

## Remarks

Whether to force TLS session resumption when the destination address changes.

## Data Type

bool

# tls_groups property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Specifies a list of key exchange groups to attempt during the TLS key exchange.

## Syntax

*Rust Syntax*

```text
fn tls_groups(&self ) -> Result<String, SecureBlackboxError> fn set_tls_groups(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_tls_groups_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

Specifies a list of key exchange groups to attempt during the TLS key exchange.

Keep this setting at its default value (empty string) to stick with the default list of key exchange groups. You can tweak the list by using '+' and '-' modifiers that are immediately followed by a group name or the *all* placeholder:

```text
  // Ensure the two x25519-based groups are enabled and the finite field DHE2048 is disabled
  client.TLSSettings.Groups = "+x25519mlkem768;+x25519;-ffdhe2048";

  // Only enable the hybrid X25519/ML-KEM768 group
  client.TLSSettings.Groups = "-all;+x25519mlkem768";
```

The list of groups supported by the component is provided below. All the names are case-insensitive:

**Elliptic curve-based groups:**

- SECT163K1
- SECT163R1
- SECT163R2
- SECT193R1
- SECT193R2
- SECT233K1
- SECT233R1
- SECT239K1
- SECT283K1
- SECT283R1
- SECT409K1
- SECT409R1
- SECT571K1
- SECT571R1
- SECP160K1
- SECP160R1
- SECP160R2
- SECP192K1
- SECP192R1
- SECP224K1
- SECP224R1
- SECP256K1
- SECP256R1
- SECP384R1
- SECP521R1
- BRAINPOOLP256R1
- BRAINPOOLP384R1
- BRAINPOOLP512R1
- X25519
- X448

**Finite field-based groups:**

- FFDHE2048
- FFDHE3072
- FFDHE4096
- FFDHE6144
- FFDHE8192

**Post-Quantum and Hybrid groups:**

- MLKEM512
- MLKEM768
- MLKEM1024
- SECP256R1MLKEM768
- X25519MLKEM768
- SECP384R1MLKEM1024

Note: this property was called *ECCurves* in SecureBlackbox 2024 and older.

## Data Type

String

# tls_pre_shared_identity property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Defines the identity used when the PSK (Pre-Shared Key) key-exchange mechanism is negotiated.

## Syntax

*Rust Syntax*

```text
fn tls_pre_shared_identity(&self ) -> Result<String, SecureBlackboxError> fn set_tls_pre_shared_identity(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_tls_pre_shared_identity_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

Defines the identity used when the PSK (Pre-Shared Key) key-exchange mechanism is negotiated.

## Data Type

String

# tls_pre_shared_key property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Contains the pre-shared key for the PSK (Pre-Shared Key) key-exchange mechanism, encoded with base16.

## Syntax

*Rust Syntax*

```text
fn tls_pre_shared_key(&self ) -> Result<String, SecureBlackboxError> fn set_tls_pre_shared_key(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_tls_pre_shared_key_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

Contains the pre-shared key for the PSK (Pre-Shared Key) key-exchange mechanism, encoded with base16.

## Data Type

String

# tls_pre_shared_key_ciphersuite property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Defines the ciphersuite used for PSK (Pre-Shared Key) negotiation.

## Syntax

*Rust Syntax*

```text
fn tls_pre_shared_key_ciphersuite(&self ) -> Result<String, SecureBlackboxError> fn set_tls_pre_shared_key_ciphersuite(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_tls_pre_shared_key_ciphersuite_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

Defines the ciphersuite used for PSK (Pre-Shared Key) negotiation.

## Data Type

String

# tls_renegotiation_attack_prevention_mode property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Selects the renegotiation attack prevention mechanism.

## Syntax

*Rust Syntax*

```text
fn tls_renegotiation_attack_prevention_mode(&self ) -> Result<i32, SecureBlackboxError> fn set_tls_renegotiation_attack_prevention_mode(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Possible Values

```text
0   // Compatible1   // Strict2   // Auto
```

## Default Value

2

## Remarks

Selects the renegotiation attack prevention mechanism.

The following options are available:

|  |  |  |
| --- | --- | --- |
| crapmCompatible | 0 | TLS 1.0 and 1.1 compatibility mode (renegotiation indication extension is disabled). |
| crapmStrict | 1 | Renegotiation attack prevention is enabled and enforced. |
| crapmAuto | 2 | Automatically choose whether to enable or disable renegotiation attack prevention. |

## Data Type

i32

# tls_revocation_check property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Specifies the kind(s) of revocation check to perform.

## Syntax

*Rust Syntax*

```text
fn tls_revocation_check(&self ) -> Result<i32, SecureBlackboxError> fn set_tls_revocation_check(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Possible Values

```text
0   // None1   // Auto2   // AllCRL3   // AllOCSP4   // AllCRLAndOCSP5   // AnyCRL6   // AnyOCSP7   // AnyCRLOrOCSP8   // AnyOCSPOrCRL
```

## Default Value

1

## Remarks

Specifies the kind(s) of revocation check to perform.

Revocation checking is necessary to ensure the integrity of the chain and obtain up-to-date certificate validity and trustworthiness information.

|  |  |  |
| --- | --- | --- |
| crcNone | 0 | No revocation checking. |
| crcAuto | 1 | Automatic mode selection. Currently this maps to crcAnyOCSPOrCRL, but it may change in the future. |
| crcAllCRL | 2 | All provided CRL endpoints will be checked, and all checks must succeed. |
| crcAllOCSP | 3 | All provided OCSP endpoints will be checked, and all checks must succeed. |
| crcAllCRLAndOCSP | 4 | All provided CRL and OCSP endpoints will be checked, and all checks must succeed. |
| crcAnyCRL | 5 | All provided CRL endpoints will be checked, and at least one check must succeed. |
| crcAnyOCSP | 6 | All provided OCSP endpoints will be checked, and at least one check must succeed. |
| crcAnyCRLOrOCSP | 7 | All provided CRL and OCSP endpoints will be checked, and at least one check must succeed. CRL endpoints are checked first. |
| crcAnyOCSPOrCRL | 8 | All provided CRL and OCSP endpoints will be checked, and at least one check must succeed. OCSP endpoints are checked first. |

This setting controls the way the revocation checks are performed for every certificate in the chain. Typically certificates come with two types of revocation information sources: CRL (certificate revocation lists) and OCSP responders. CRLs are static objects periodically published by the CA at some online location. OCSP responders are active online services maintained by the CA that can provide up-to-date information on certificate statuses in near real time.

There are some conceptual differences between the two. CRLs are normally larger in size. Their use involves some latency because there is normally some delay between the time when a certificate was revoked and the time the subsequent CRL mentioning that is published. The benefits of CRL is that the same object can provide statuses for all certificates issued by a particular CA, and that the whole technology is much simpler than OCSP (and thus is supported by more CAs).

This setting lets you adjust the validation course by including or excluding certain types of revocation sources from the validation process. The crcAnyOCSPOrCRL setting (give preference to the faster OCSP route and only demand one source to succeed) is a good choice for most typical validation environments. The "crcAll*" modes are much stricter, and may be used in scenarios where bulletproof validity information is essential.

NOTE: If no CRL or OCSP endpoints are provided by the CA, the revocation check will be considered successful. This is because the CA chose not to supply revocation information for its certificates, meaning they are considered irrevocable.

NOTE: Within each of the above settings, if any retrieved CRL or OCSP response indicates that the certificate has been revoked, the revocation check fails.

## Data Type

i32

# tls_ssl_options property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Various SSL (TLS) protocol options, set of cssloExpectShutdownMessage 0x001 Wait for the close-notify message when shutting down the connection cssloOpenSSLDTLSWorkaround 0x002 (DEPRECATED) Use a DTLS version workaround when talking to very old OpenSSL versions cssloDisableKexLengthAlignment 0x004 Do not align the client-side PMS by the RSA modulus size.

## Syntax

*Rust Syntax*

```text
fn tls_ssl_options(&self ) -> Result<i32, SecureBlackboxError> fn set_tls_ssl_options(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Default Value

16

## Remarks

Various SSL (TLS) protocol options, set of

|  |  |  |
| --- | --- | --- |
| cssloExpectShutdownMessage | 0x001 | Wait for the close-notify message when shutting down the connection |
| cssloOpenSSLDTLSWorkaround | 0x002 | (DEPRECATED) Use a DTLS version workaround when talking to very old OpenSSL versions |
| cssloDisableKexLengthAlignment | 0x004 | Do not align the client-side PMS by the RSA modulus size. It is unlikely that you will ever need to adjust it. |
| cssloForceUseOfClientCertHashAlg | 0x008 | Enforce the use of the client certificate hash algorithm. It is unlikely that you will ever need to adjust it. |
| cssloAutoAddServerNameExtension | 0x010 | Automatically add the server name extension when known |
| cssloAcceptTrustedSRPPrimesOnly | 0x020 | Accept trusted SRP primes only |
| cssloDisableSignatureAlgorithmsExtension | 0x040 | Disable (do not send) the signature algorithms extension. It is unlikely that you will ever need to adjust it. |
| cssloIntolerateHigherProtocolVersions | 0x080 | (server option) Do not allow fallback from TLS versions higher than currently enabled |
| cssloStickToPrefCertHashAlg | 0x100 | Stick to preferred certificate hash algorithms |
| cssloNoImplicitTLS12Fallback | 0x200 | Disable implicit TLS 1.3 to 1.2 fallbacks |
| cssloUseHandshakeBatches | 0x400 | Send the handshake message as large batches rather than individually |

## Data Type

i32

# tls_mode property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Specifies the TLS mode to use.

## Syntax

*Rust Syntax*

```text
fn tls_mode(&self ) -> Result<i32, SecureBlackboxError> fn set_tls_mode(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Possible Values

```text
0   // Default1   // NoTLS2   // ExplicitTLS3   // ImplicitTLS4   // MixedTLS
```

## Default Value

0

## Remarks

Specifies the TLS mode to use.

|  |  |  |
| --- | --- | --- |
| smDefault | 0 |  |
| smNoTLS | 1 | Do not use TLS |
| smExplicitTLS | 2 | Connect to the server without any encryption and then request an SSL session. |
| smImplicitTLS | 3 | Connect to the specified port, and establish the SSL session at once. |
| smMixedTLS | 4 | Connect to the specified port, and establish the SSL session at once, but allow plain data. |

## Data Type

i32

# tls_use_extended_master_secret property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Enables the Extended Master Secret Extension, as defined in RFC 7627.

## Syntax

*Rust Syntax*

```text
fn tls_use_extended_master_secret(&self ) -> Result<bool, SecureBlackboxError> fn set_tls_use_extended_master_secret(&self, value : bool) ->  Option<SecureBlackboxError>
```

## Default Value

true

## Remarks

Enables the Extended Master Secret Extension, as defined in RFC 7627.

## Data Type

bool

# tls_use_session_resumption property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Enables or disables the TLS session resumption capability.

## Syntax

*Rust Syntax*

```text
fn tls_use_session_resumption(&self ) -> Result<bool, SecureBlackboxError> fn set_tls_use_session_resumption(&self, value : bool) ->  Option<SecureBlackboxError>
```

## Default Value

false

## Remarks

Enables or disables the TLS session resumption capability.

## Data Type

bool

# tls_versions property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The SSL/TLS versions to enable by default.

## Syntax

*Rust Syntax*

```text
fn tls_versions(&self ) -> Result<i32, SecureBlackboxError> fn set_tls_versions(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Default Value

48

## Remarks

The SSL/TLS versions to enable by default.

|  |  |  |
| --- | --- | --- |
| csbSSL2 | 0x01 | SSL 2 |
| csbSSL3 | 0x02 | SSL 3 |
| csbTLS1 | 0x04 | TLS 1.0 |
| csbTLS11 | 0x08 | TLS 1.1 |
| csbTLS12 | 0x10 | TLS 1.2 |
| csbTLS13 | 0x20 | TLS 1.3 |

## Data Type

i32

# transfer_type property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Sets the file transfer mode.

## Syntax

*Rust Syntax*

```text
fn transfer_type(&self ) -> Result<i32, SecureBlackboxError> fn set_transfer_type(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Possible Values

```text
0   // Text1   // Binary
```

## Default Value

1

## Remarks

Use this property to switch between binary and text transfer modes.

|  |  |
| --- | --- |
| cttText | 0 |
| cttBinary | 1 |

## Data Type

i32

# trusted_cert_count property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The number of records in the TrustedCert arrays.

## Syntax

*Rust Syntax*

```text
fn trusted_cert_count(&self ) -> Result<i32, SecureBlackboxError> fn set_trusted_cert_count(&self, value : i32) ->  Option<SecureBlackboxError>
```

## Default Value

0

## Remarks

This property controls the size of the following arrays:

- [trusted_cert_bytes](#trusted_cert_bytes-property-ftpclient-struct)
- [trusted_cert_handle](#trusted_cert_handle-property-ftpclient-struct)

The array indices start at *0* and end at *trusted_cert_count - 1*.

## Data Type

i32

# trusted_cert_bytes property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Returns the raw certificate data in DER format.

## Syntax

*Rust Syntax*

```text
fn trusted_cert_bytes(&self , TrustedCertIndex : i32) -> Result<Vec<u8>, SecureBlackboxError>
```

## Remarks

Returns the raw certificate data in DER format.

The *TrustedCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [TrustedCertCount](#trusted_cert_count-property-ftpclient-struct) property.

This property is read-only.

## Data Type

Vec

# trusted_cert_handle property ([FTPClient](#struct-secureblackboxftpclient) Struct)

Allows to get or set a 'handle', a unique identifier of the underlying property object.

## Syntax

*Rust Syntax*

```text
fn trusted_cert_handle(&self , TrustedCertIndex : i32) -> Result<i64, SecureBlackboxError> fn set_trusted_cert_handle(&self, TrustedCertIndex : i32, value : i64) ->  Option<SecureBlackboxError>
```

## Default Value

0

## Remarks

Allows to get or set a 'handle', a unique identifier of the underlying property object. Use this property to assign objects of the same type in a quicker manner, without copying them fieldwise.

When you pass a handle of one object to another, the source object is copied to the destination rather than assigned. It is safe to get rid of the original object after such operation.

```text
  pdfSigner.setSigningCertHandle(certMgr.getCertHandle());
```

The *TrustedCertIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [TrustedCertCount](#trusted_cert_count-property-ftpclient-struct) property.

## Data Type

i64

# username property ([FTPClient](#struct-secureblackboxftpclient) Struct)

The connecting user's username (login name).

## Syntax

*Rust Syntax*

```text
fn username(&self ) -> Result<String, SecureBlackboxError> fn set_username(&self, value : &str) ->  Option<SecureBlackboxError>
fn set_username_ref(&self, value : &String) ->  Option<SecureBlackboxError>
```

## Default Value

""

## Remarks

Assign the user's login name to this property. Use [password](#password-property-ftpclient-struct) to provide the password.

## Data Type

String

# abort method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Aborts the previous FTP service command and any associated transfer of data.

## Syntax

*Rust Syntax*

```text
fn abort(&self) -> Result<(), SecureBlackboxError>
```

## Remarks

Use this method to abort the previous FTP service command and any associated data transfer.

# acct method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Sends an Account command.

## Syntax

*Rust Syntax*

```text
fn acct(&self, acct_info : &str) -> Result<(), SecureBlackboxError>
```

## Remarks

Some servers require the ACCT command to be sent after signing in to grant access to specific server resources.

Reply codes sometimes allow to differentiate the handling of ACCT command:

- when account information is required for login, the response to a successful PASSword command is reply code 332;
- if account information is NOT required for login, the reply to a successful PASSword command is 230;
- if account information is needed for a command issued later in the dialogue, the server should return a 332 or 532 reply depending on whether it stores (pending receipt of the ACCounT command) or discards the command, respectively.

# append_bytes method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Appends a byte array to a server-side file.

## Syntax

*Rust Syntax*

```text
fn append_bytes(&self, bytes : &[u8], remote_file : &str) -> Result<(), SecureBlackboxError>
```

## Remarks

Use this method to append *Bytes* to *RemoteFile* on the server.

# append_file method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Uploads a file to the server.

## Syntax

*Rust Syntax*

```text
fn append_file(&self, local_file : &str, remote_file : &str) -> Result<(), SecureBlackboxError>
```

## Remarks

Use this method to upload *LocalFile* or its part to *RemoteFile* on the server.

# change_dir method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Changes the current directory.

## Syntax

*Rust Syntax*

```text
fn change_dir(&self, remote_dir : &str) -> Result<(), SecureBlackboxError>
```

## Remarks

Call this method to change the current server directory to *RemoteDir*.

# clear_command_channel method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Sends CCC (Clear Command Channel) command to the server.

## Syntax

*Rust Syntax*

```text
fn clear_command_channel(&self, graceful_ssl_closure : bool) -> Result<(), SecureBlackboxError>
```

## Remarks

Use this method to send a CCC command. CCC clears command channel encryption state, turning off TLS encryption.

Some servers expect this command to allow for the control channel to be properly handled by NATs.

# config method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Sets or retrieves a configuration setting.

## Syntax

*Rust Syntax*

```text
fn config(&self, configuration_string : &str) ->  Result<String, SecureBlackboxError>
```

## Remarks

config is a generic method available in every struct. It is used to set and retrieve [configuration settings](#config-settings-ftpclient-struct) for the struct.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the struct, access to these *internal properties* is provided through the config method.

To set a configuration setting named *PROPERTY*, you must call *Config("PROPERTY=VALUE")*, where *VALUE* is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).

To read (query) the value of a [configuration setting](#config-settings-ftpclient-struct), you must call *Config("PROPERTY")*. The value will be returned as a string.

# connect method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Connects to the FTP server.

## Syntax

*Rust Syntax*

```text
fn connect(&self, address : &str, port : i32) -> Result<(), SecureBlackboxError>
```

## Remarks

Call this method to connect to the FTP server residing at *Address:Port*.

The component will connect to the server using the connection settings provided. If the connection is successful, it will also authenticate using the provided [username](#username-property-ftpclient-struct) and [password](#password-property-ftpclient-struct).

# delete_dir method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Deletes a directory on the server.

## Syntax

*Rust Syntax*

```text
fn delete_dir(&self, remote_dir : &str) -> Result<(), SecureBlackboxError>
```

## Remarks

This method sends an RMD command to the server to request deletion of a remote directory.

# delete_file method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Deletes a file on the server.

## Syntax

*Rust Syntax*

```text
fn delete_file(&self, remote_file : &str) -> Result<(), SecureBlackboxError>
```

## Remarks

This method sends a DELE command to the server to request deletion of a remote file.

# dir_exists method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Checks if a directory exists on the server.

## Syntax

*Rust Syntax*

```text
fn dir_exists(&self, remote_dir : &str) ->  Result<bool, SecureBlackboxError>
```

## Remarks

Use this method to check if the *RemoteDir* exists on the server.

The test is performed by attempting to change the current directory to *RemoteDir*, and checking the response code returned by the server.

Note that this method will return false if the directory does exist but is not accessible for the client (e.g. due to a permission issue).

# disconnect method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Disconnects from the server.

## Syntax

*Rust Syntax*

```text
fn disconnect(&self) -> Result<(), SecureBlackboxError>
```

## Remarks

Call this method to disconnect from the server.

# do_action method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Performs an additional action.

## Syntax

*Rust Syntax*

```text
fn do_action(&self, action_id : &str, action_params : &str) ->  Result<String, SecureBlackboxError>
```

## Remarks

do_action is a generic method available in every struct. It is used to perform an additional action introduced after the product major release. The list of actions is not fixed, and may be flexibly extended over time.

The unique identifier (case insensitive) of the action is provided in the *ActionID* parameter.

*ActionParams* contains the value of a single parameter, or a list of multiple parameters for the action in the form of *PARAM1=VALUE1;PARAM2=VALUE2;...*.

Common ActionIDs:

|  |  |  |  |
| --- | --- | --- | --- |
| Action | Parameters | Returned value | Description |
| ResetTrustedListCache | none | none | Clears the cached list of trusted lists. |
| ResetCertificateCache | none | none | Clears the cached certificates. |
| ResetCRLCache | none | none | Clears the cached CRLs. |
| ResetOCSPResponseCache | none | none | Clears the cached OCSP responses. |

# download_bytes method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Downloads a file from the server into an array of bytes.

## Syntax

*Rust Syntax*

```text
fn download_bytes(&self, remote_file : &str) ->  Result<Vec<u8>, SecureBlackboxError>
```

## Remarks

Use this method to download *RemoteFile* into a byte array.

# download_file method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Downloads a file from the server.

## Syntax

*Rust Syntax*

```text
fn download_file(&self, remote_file : &str, local_file : &str) -> Result<(), SecureBlackboxError>
```

## Remarks

Use this method to download *RemoteFile* into *LocalFile*.

# download_files method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Downloads multiple files from the server.

## Syntax

*Rust Syntax*

```text
fn download_files(&self, remote_path : &str, local_dir : &str, recursive : bool, error_handling : i32) -> Result<(), SecureBlackboxError>
```

## Remarks

Use this method do download a collection of files from the server.

*RemotePath* can contain a simple mask, a set of masks, or a regular expression. All the files that match the provided rule will be downloaded to *LocalDir*. The *Recursive* parameter tells the component whether it should navigate source directories recursively when downloading files. If set to false, only the files residing in the actual *RemotePath*, but not its subdirectories, will be downloaded.

The *ErrorHandling* parameter specifies one of the pre-defined error handling tactics:

|  |  |  |
| --- | --- | --- |
| ehStopOnFailure | 0 | Stop on the first failure and throw an exception |
| ehIgnoreErrors | 1 | Ignore individual processing errors, just proceed to the next item on the list |
| ehTryAllItems | 2 | Try to process all the items by ignoring any mid-way errors, but throw an exception at the end of the processing if any of the items failed to process |

# file_exists method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Checks if a file exists on the server.

## Syntax

*Rust Syntax*

```text
fn file_exists(&self, remote_file : &str) ->  Result<bool, SecureBlackboxError>
```

## Remarks

Use this method to check if *RemoteFile* exists in the current remote directory. This method attempts to detect file existence using SIZE and MLST commands first, and falls back to LIST command if they are not available.

Please note that this command only looks for the file in the current directory. To check for existence of a file in a different directory, change to it with [change_dir](#change_dir-method-ftpclient-struct) command first, then call this method.

# get_current_dir method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Returns the server-side current directory.

## Syntax

*Rust Syntax*

```text
fn get_current_dir(&self) ->  Result<String, SecureBlackboxError>
```

## Remarks

Use this method to find out the current directory on the server.

# get_file_size method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Returns the size of a remote file.

## Syntax

*Rust Syntax*

```text
fn get_file_size(&self, remote_file : &str) ->  Result<i64, SecureBlackboxError>
```

## Remarks

Use this method to retrieve the size of a remote file. This method attempts to use SIZE and MLST commands if available, and resorts to LIST command otherwise.

Please note that this command only looks for the file in the current directory. To check for existence of a file in a different directory, change to it with [change_dir](#change_dir-method-ftpclient-struct) command first, then call this method.

# list_dir method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Lists the contents of a remote directory.

## Syntax

*Rust Syntax*

```text
fn list_dir(&self, include_files : bool, include_directories : bool) ->  Result<String, SecureBlackboxError>
```

## Remarks

Use the *IncludeFiles* and *IncludeDirectories* parameters to tune up the output. The output of *IncludeFiles* also includes symbolic links.

This method returns a human-readable string containing the requested list. It also fires [on_list_entry](#on_list_entry-event-ftpclient-struct) for each entry in the list, propagating its details in current_list_entry.

This method uses some heuristics internally by choosing the most appropriate listing method among MLSD, NLST, and LIST.

# make_dir method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Creates a new directory on the server.

## Syntax

*Rust Syntax*

```text
fn make_dir(&self, remote_dir : &str) -> Result<(), SecureBlackboxError>
```

## Remarks

This method creates a directory. The path provided via *RemoteDir* can either be absolute or relative.

Depending on the server, the directory structure up to the innermost element might need to exist.

# noop method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Sends a NOOP command to the server.

## Syntax

*Rust Syntax*

```text
fn noop(&self) -> Result<(), SecureBlackboxError>
```

## Remarks

Call this method to send a NOOP (No Operation) command to the server.

# rename method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Renames a file.

## Syntax

*Rust Syntax*

```text
fn rename(&self, source_file : &str, dest_file : &str) -> Result<(), SecureBlackboxError>
```

## Remarks

Use this method to rename a server-side *SourceFile* to *DestFile*.

# reset method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Resets the struct settings.

## Syntax

*Rust Syntax*

```text
fn reset(&self) -> Result<(), SecureBlackboxError>
```

## Remarks

reset is a generic method available in every struct.

# send_command method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Sends a custom command to the server.

## Syntax

*Rust Syntax*

```text
fn send_command(&self, command : &str) ->  Result<i32, SecureBlackboxError>
```

## Remarks

This method sends an arbitrary command to the server and returns the status code received. Use it to send custom or non-standard commands, or tune up the session flow as required by the server.

# upload_bytes method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Uploads a byte array to the server.

## Syntax

*Rust Syntax*

```text
fn upload_bytes(&self, bytes : &[u8], remote_file : &str) -> Result<(), SecureBlackboxError>
```

## Remarks

Use this method to upload *Bytes* or its part to *RemoteFile* on the server.

# upload_file method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Uploads a file to the server.

## Syntax

*Rust Syntax*

```text
fn upload_file(&self, local_file : &str, remote_file : &str) -> Result<(), SecureBlackboxError>
```

## Remarks

Use this method to upload *LocalFile* or its part to *RemoteFile* on the server.

# upload_files method ([FTPClient](#struct-secureblackboxftpclient) Struct)

Uploads multiple files to the server.

## Syntax

*Rust Syntax*

```text
fn upload_files(&self, local_path : &str, remote_dir : &str, recursive : bool, error_handling : i32) -> Result<(), SecureBlackboxError>
```

## Remarks

This method uploads all the files that match the *LocalPath* criteria to *RemoteDir* directory on the server. *LocalPath* accepts a simple mask, a set of masks, or a regular expression. The *Recursive* parameter tells the component whether it should navigate source directories recursively when uploading files. If set to false, only the files residing in the actual *LocalPath*, but not its subdirectories, will be uploaded.

The *ErrorHandling* parameter specifies the error handling tactics:

|  |  |  |
| --- | --- | --- |
| ehStopOnFailure | 0 | Stop on the first failure and throw an exception |
| ehIgnoreErrors | 1 | Ignore individual processing errors, just proceed to the next item on the list |
| ehTryAllItems | 2 | Try to process all the items by ignoring any mid-way errors, but throw an exception at the end of the processing if any of the items failed to process |

For each file being uploaded a pair of [on_file_operation](#on_file_operation-event-ftpclient-struct) and [on_file_operation_result](#on_file_operation_result-event-ftpclient-struct) events are invoked.

# on_control_receive event ([FTPClient](#struct-secureblackboxftpclient) Struct)

Fires when data is received via the control channel.

## Syntax

*Rust Syntax*

```text
// FTPClientControlReceiveEventArgs carries the FTPClient ControlReceive event's parameters.
pub struct FTPClientControlReceiveEventArgs {
  fn text_line(&self) -> &String
}

// FTPClientControlReceiveEvent defines the signature of the FTPClient ControlReceive event's handler function.
pub trait FTPClientControlReceiveEvent {
  fn on_control_receive(&self, sender : FTPClient, e : &mut FTPClientControlReceiveEventArgs);
}

impl <'a> FTPClient<'a> {
  pub fn on_control_receive(&self) -> &'a dyn FTPClientControlReceiveEvent;
  pub fn set_on_control_receive(&mut self, value : &'a dyn FTPClientControlReceiveEvent);
  ...
}
```

## Remarks

*TextLine* contains the data that was received, which would typically contain a reply to a command (e.g. 200 Command OK).

# on_control_send event ([FTPClient](#struct-secureblackboxftpclient) Struct)

Fires when data is about to be set via the control channel.

## Syntax

*Rust Syntax*

```text
// FTPClientControlSendEventArgs carries the FTPClient ControlSend event's parameters.
pub struct FTPClientControlSendEventArgs {
  fn text_line(&self) -> &String
}

// FTPClientControlSendEvent defines the signature of the FTPClient ControlSend event's handler function.
pub trait FTPClientControlSendEvent {
  fn on_control_send(&self, sender : FTPClient, e : &mut FTPClientControlSendEventArgs);
}

impl <'a> FTPClient<'a> {
  pub fn on_control_send(&self) -> &'a dyn FTPClientControlSendEvent;
  pub fn set_on_control_send(&mut self, value : &'a dyn FTPClientControlSendEvent);
  ...
}
```

## Remarks

*TextLine* contains the data to be sent, which would typically contain a command issued by the client (e.g. CWD dir).

# on_error event ([FTPClient](#struct-secureblackboxftpclient) Struct)

Information about errors during data delivery.

## Syntax

*Rust Syntax*

```text
// FTPClientErrorEventArgs carries the FTPClient Error event's parameters.
pub struct FTPClientErrorEventArgs {
  fn error_code(&self) -> i32
  fn description(&self) -> &String
}

// FTPClientErrorEvent defines the signature of the FTPClient Error event's handler function.
pub trait FTPClientErrorEvent {
  fn on_error(&self, sender : FTPClient, e : &mut FTPClientErrorEventArgs);
}

impl <'a> FTPClient<'a> {
  pub fn on_error(&self) -> &'a dyn FTPClientErrorEvent;
  pub fn set_on_error(&mut self, value : &'a dyn FTPClientErrorEvent);
  ...
}
```

## Remarks

The event is fired in case of exceptional conditions during message processing.

*ErrorCode* contains an error code and *Description* contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the [FTP](#trappable-errors-ftpclient-struct) section.

# on_external_sign event ([FTPClient](#struct-secureblackboxftpclient) Struct)

Handles remote or external signing initiated by the SignExternal method or other source.

## Syntax

*Rust Syntax*

```text
// FTPClientExternalSignEventArgs carries the FTPClient ExternalSign event's parameters.
pub struct FTPClientExternalSignEventArgs {
  fn operation_id(&self) -> &String
  fn hash_algorithm(&self) -> &String
  fn pars(&self) -> &String
  fn data(&self) -> &String
  fn signed_data(&self) -> &String
  fn set_signed_data(&self, value : &str)
  fn set_signed_data_ref(&self, value : &String)
}

// FTPClientExternalSignEvent defines the signature of the FTPClient ExternalSign event's handler function.
pub trait FTPClientExternalSignEvent {
  fn on_external_sign(&self, sender : FTPClient, e : &mut FTPClientExternalSignEventArgs);
}

impl <'a> FTPClient<'a> {
  pub fn on_external_sign(&self) -> &'a dyn FTPClientExternalSignEvent;
  pub fn set_on_external_sign(&mut self, value : &'a dyn FTPClientExternalSignEvent);
  ...
}
```

## Remarks

Assign a handler to this event if you need to delegate a low-level signing operation to an external, remote, or custom signing engine. Depending on the settings, the handler will receive a hashed or unhashed value to be signed.

The event handler must pass the value of *Data* to the signer, obtain the signature, and pass it back to the struct via the *SignedData* parameter.

*OperationId* provides a comment about the operation and its origin. It depends on the exact struct being used, and may be empty. *HashAlgorithm* specifies the hash algorithm being used for the operation, and *Pars* contains algorithm-dependent parameters.

The struct uses base16 (hex) encoding for the *Data*, *SignedData*, and *Pars* parameters. If your signing engine uses a different input and output encoding, you may need to decode and/or encode the data before and/or after the signing.

A sample MD5 hash encoded in base16: a0dee2a0382afbb09120ffa7ccd8a152 - lower case base16 A0DEE2A0382AFBB09120FFA7CCD8A152 - upper case base16

A sample event handler that uses the .NET RSACryptoServiceProvider class may look like the following:

```text
signer.OnExternalSign += (s, e) =>
{
       var cert = new X509Certificate2("cert.pfx", "", X509KeyStorageFlags.Exportable);
       var key = (RSACryptoServiceProvider)cert.PrivateKey;

       var dataToSign = e.Data.FromBase16String();
       var signedData = key.SignHash(dataToSign, "2.16.840.1.101.3.4.2.1");
       e.SignedData = signedData.ToBase16String();
};
```

# on_file_name_change_needed event ([FTPClient](#struct-secureblackboxftpclient) Struct)

Asks the application for a new file name.

## Syntax

*Rust Syntax*

```text
// FTPClientFileNameChangeNeededEventArgs carries the FTPClient FileNameChangeNeeded event's parameters.
pub struct FTPClientFileNameChangeNeededEventArgs {
  fn file_name(&self) -> &String
  fn set_file_name(&self, value : &str)
  fn set_file_name_ref(&self, value : &String)
  fn force(&self) -> bool
  fn set_force(&self, value : bool)
}

// FTPClientFileNameChangeNeededEvent defines the signature of the FTPClient FileNameChangeNeeded event's handler function.
pub trait FTPClientFileNameChangeNeededEvent {
  fn on_file_name_change_needed(&self, sender : FTPClient, e : &mut FTPClientFileNameChangeNeededEventArgs);
}

impl <'a> FTPClient<'a> {
  pub fn on_file_name_change_needed(&self) -> &'a dyn FTPClientFileNameChangeNeededEvent;
  pub fn set_on_file_name_change_needed(&mut self, value : &'a dyn FTPClientFileNameChangeNeededEvent);
  ...
}
```

## Remarks

The component uses this event to ask the application for a new file name in the case of a name conflict. Adjust the *FileName* as required to avoid the conflict, or set *Force* to true to go ahead with the current name (possibly overwriting an existing file).

# on_file_operation event ([FTPClient](#struct-secureblackboxftpclient) Struct)

Marks the start of a file transfer.

## Syntax

*Rust Syntax*

```text
// FTPClientFileOperationEventArgs carries the FTPClient FileOperation event's parameters.
pub struct FTPClientFileOperationEventArgs {
  fn operation(&self) -> i32
  fn remote_path(&self) -> &String
  fn local_path(&self) -> &String
  fn skip(&self) -> bool
  fn set_skip(&self, value : bool)
  fn cancel(&self) -> bool
  fn set_cancel(&self, value : bool)
}

// FTPClientFileOperationEvent defines the signature of the FTPClient FileOperation event's handler function.
pub trait FTPClientFileOperationEvent {
  fn on_file_operation(&self, sender : FTPClient, e : &mut FTPClientFileOperationEventArgs);
}

impl <'a> FTPClient<'a> {
  pub fn on_file_operation(&self) -> &'a dyn FTPClientFileOperationEvent;
  pub fn set_on_file_operation(&mut self, value : &'a dyn FTPClientFileOperationEvent);
  ...
}
```

## Remarks

The struct fires this event from [download_files](#download_files-method-ftpclient-struct) and [upload_files](#upload_files-method-ftpclient-struct) to notify the application that the transfer of the next file in the list is about to start.

Use the *Skip* parameter to skip this particular file, or *Cancel* to cancel the whole multi-file operation.

Operations:

|  |  |  |
| --- | --- | --- |
| cffoDownloadFile | 0 | Download file |
| cffoUploadFile | 1 | Upload file |
| cffoDeleteFile | 2 | Delete file |
| cffoMakeDir | 3 | Make directory |

# on_file_operation_result event ([FTPClient](#struct-secureblackboxftpclient) Struct)

Reports the result of a file transfer operation.

## Syntax

*Rust Syntax*

```text
// FTPClientFileOperationResultEventArgs carries the FTPClient FileOperationResult event's parameters.
pub struct FTPClientFileOperationResultEventArgs {
  fn operation(&self) -> i32
  fn remote_path(&self) -> &String
  fn local_path(&self) -> &String
  fn error_code(&self) -> i32
  fn comment(&self) -> &String
  fn cancel(&self) -> bool
  fn set_cancel(&self, value : bool)
}

// FTPClientFileOperationResultEvent defines the signature of the FTPClient FileOperationResult event's handler function.
pub trait FTPClientFileOperationResultEvent {
  fn on_file_operation_result(&self, sender : FTPClient, e : &mut FTPClientFileOperationResultEventArgs);
}

impl <'a> FTPClient<'a> {
  pub fn on_file_operation_result(&self) -> &'a dyn FTPClientFileOperationResultEvent;
  pub fn set_on_file_operation_result(&mut self, value : &'a dyn FTPClientFileOperationResultEvent);
  ...
}
```

## Remarks

The struct fires this event from [download_files](#download_files-method-ftpclient-struct) and [upload_files](#upload_files-method-ftpclient-struct) to notify the application of the completion of a file operation.

*ErrorCode* and *Comment* provide the details of the operation. Use the *Cancel* parameter to terminate the whole multi-file operation if needed.

Operations:

|  |  |  |
| --- | --- | --- |
| cffoDownloadFile | 0 | Download file |
| cffoUploadFile | 1 | Upload file |
| cffoDeleteFile | 2 | Delete file |
| cffoMakeDir | 3 | Make directory |

# on_list_entry event ([FTPClient](#struct-secureblackboxftpclient) Struct)

Reports a single entry from the requested directory listing.

## Syntax

*Rust Syntax*

```text
// FTPClientListEntryEventArgs carries the FTPClient ListEntry event's parameters.
pub struct FTPClientListEntryEventArgs {
  fn file_name(&self) -> &String
}

// FTPClientListEntryEvent defines the signature of the FTPClient ListEntry event's handler function.
pub trait FTPClientListEntryEvent {
  fn on_list_entry(&self, sender : FTPClient, e : &mut FTPClientListEntryEventArgs);
}

impl <'a> FTPClient<'a> {
  pub fn on_list_entry(&self) -> &'a dyn FTPClientListEntryEvent;
  pub fn set_on_list_entry(&mut self, value : &'a dyn FTPClientListEntryEvent);
  ...
}
```

## Remarks

*FileName* contains the filename of the reported entry. Read the details of the entry from current_list_entry property.

# on_notification event ([FTPClient](#struct-secureblackboxftpclient) Struct)

This event notifies the application about an underlying control flow event.

## Syntax

*Rust Syntax*

```text
// FTPClientNotificationEventArgs carries the FTPClient Notification event's parameters.
pub struct FTPClientNotificationEventArgs {
  fn event_id(&self) -> &String
  fn event_param(&self) -> &String
}

// FTPClientNotificationEvent defines the signature of the FTPClient Notification event's handler function.
pub trait FTPClientNotificationEvent {
  fn on_notification(&self, sender : FTPClient, e : &mut FTPClientNotificationEventArgs);
}

impl <'a> FTPClient<'a> {
  pub fn on_notification(&self) -> &'a dyn FTPClientNotificationEvent;
  pub fn set_on_notification(&mut self, value : &'a dyn FTPClientNotificationEvent);
  ...
}
```

## Remarks

The struct fires this event to let the application know about some event, occurrence, or milestone in the struct. For example, it may fire to report completion of the document processing. The list of events being reported is not fixed, and may be flexibly extended over time.

The unique identifier of the event is provided in the *EventID* parameter. *EventParam* contains any parameters accompanying the occurrence. Depending on the type of the struct, the exact action it is performing, or the document being processed, one or both may be omitted.

This struct can fire this event with the following *EventID* values:

|  |  |
| --- | --- |
| TLSExtensions.CertificateStatus | TBD |
| TLSExtensions.PreSharedIdentityHint | TBD |

# on_progress event ([FTPClient](#struct-secureblackboxftpclient) Struct)

Reports the data transfer progress.

## Syntax

*Rust Syntax*

```text
// FTPClientProgressEventArgs carries the FTPClient Progress event's parameters.
pub struct FTPClientProgressEventArgs {
  fn total(&self) -> i64
  fn current(&self) -> i64
  fn cancel(&self) -> bool
  fn set_cancel(&self, value : bool)
}

// FTPClientProgressEvent defines the signature of the FTPClient Progress event's handler function.
pub trait FTPClientProgressEvent {
  fn on_progress(&self, sender : FTPClient, e : &mut FTPClientProgressEventArgs);
}

impl <'a> FTPClient<'a> {
  pub fn on_progress(&self) -> &'a dyn FTPClientProgressEvent;
  pub fn set_on_progress(&mut self, value : &'a dyn FTPClientProgressEvent);
  ...
}
```

## Remarks

This event fires periodically during a file transfer operation to report its progress.

Use the *Cancel* parameter to terminate the transfer if needed.

# on_text_data_line event ([FTPClient](#struct-secureblackboxftpclient) Struct)

Reports next transferred data line.

## Syntax

*Rust Syntax*

```text
// FTPClientTextDataLineEventArgs carries the FTPClient TextDataLine event's parameters.
pub struct FTPClientTextDataLineEventArgs {
  fn text_line(&self) -> &String
}

// FTPClientTextDataLineEvent defines the signature of the FTPClient TextDataLine event's handler function.
pub trait FTPClientTextDataLineEvent {
  fn on_text_data_line(&self, sender : FTPClient, e : &mut FTPClientTextDataLineEventArgs);
}

impl <'a> FTPClient<'a> {
  pub fn on_text_data_line(&self) -> &'a dyn FTPClientTextDataLineEvent;
  pub fn set_on_text_data_line(&mut self, value : &'a dyn FTPClientTextDataLineEvent);
  ...
}
```

## Remarks

The struct fires this event in series when transferring a file in ASCII mode to report each line being transferred.

# on_tls_cert_needed event ([FTPClient](#struct-secureblackboxftpclient) Struct)

Fires when a remote TLS party requests a client certificate.

## Syntax

*Rust Syntax*

```text
// FTPClientTLSCertNeededEventArgs carries the FTPClient TLSCertNeeded event's parameters.
pub struct FTPClientTLSCertNeededEventArgs {
  fn host(&self) -> &String
  fn ca_names(&self) -> &String
}

// FTPClientTLSCertNeededEvent defines the signature of the FTPClient TLSCertNeeded event's handler function.
pub trait FTPClientTLSCertNeededEvent {
  fn on_tls_cert_needed(&self, sender : FTPClient, e : &mut FTPClientTLSCertNeededEventArgs);
}

impl <'a> FTPClient<'a> {
  pub fn on_tls_cert_needed(&self) -> &'a dyn FTPClientTLSCertNeededEvent;
  pub fn set_on_tls_cert_needed(&mut self, value : &'a dyn FTPClientTLSCertNeededEvent);
  ...
}
```

## Remarks

This event fires to notify the implementation that a remote TLS server has requested a client certificate. The *Host* parameter identifies the host that makes a request, and the *CANames* parameter (optional, according to the TLS spec) advises on the accepted issuing CAs.

Use the tls_client_chain property in response to this event to provide the requested certificate. Please make sure the client certificate includes the associated private key. Note that you may set the certificates before the connection without waiting for this event to fire.

This event is preceded by the [on_tls_handshake](#on_tls_handshake-event-ftpclient-struct) event for the given host and, if the certificate was accepted, succeeded by the [on_tls_established](#on_tls_established-event-ftpclient-struct) event.

# on_tls_cert_validate event ([FTPClient](#struct-secureblackboxftpclient) Struct)

This event is fired upon receipt of the TLS server's certificate, allowing the user to control its acceptance.

## Syntax

*Rust Syntax*

```text
// FTPClientTLSCertValidateEventArgs carries the FTPClient TLSCertValidate event's parameters.
pub struct FTPClientTLSCertValidateEventArgs {
  fn server_host(&self) -> &String
  fn server_ip(&self) -> &String
  fn accept(&self) -> bool
  fn set_accept(&self, value : bool)
}

// FTPClientTLSCertValidateEvent defines the signature of the FTPClient TLSCertValidate event's handler function.
pub trait FTPClientTLSCertValidateEvent {
  fn on_tls_cert_validate(&self, sender : FTPClient, e : &mut FTPClientTLSCertValidateEventArgs);
}

impl <'a> FTPClient<'a> {
  pub fn on_tls_cert_validate(&self) -> &'a dyn FTPClientTLSCertValidateEvent;
  pub fn set_on_tls_cert_validate(&mut self, value : &'a dyn FTPClientTLSCertValidateEvent);
  ...
}
```

## Remarks

This event is fired during a TLS handshake. Use the tls_server_chain property to access the certificate chain. In general, structs may contact a number of TLS endpoints during their work, depending on their configuration.

*Accept* is assigned in accordance with the outcome of the internal validation check performed by the struct, and can be adjusted if needed.

# on_tls_established event ([FTPClient](#struct-secureblackboxftpclient) Struct)

Fires when a TLS handshake with Host successfully completes.

## Syntax

*Rust Syntax*

```text
// FTPClientTLSEstablishedEventArgs carries the FTPClient TLSEstablished event's parameters.
pub struct FTPClientTLSEstablishedEventArgs {
  fn host(&self) -> &String
  fn version(&self) -> &String
  fn ciphersuite(&self) -> &String
  fn connection_id(&self) -> &[u8]
  fn abort(&self) -> bool
  fn set_abort(&self, value : bool)
}

// FTPClientTLSEstablishedEvent defines the signature of the FTPClient TLSEstablished event's handler function.
pub trait FTPClientTLSEstablishedEvent {
  fn on_tls_established(&self, sender : FTPClient, e : &mut FTPClientTLSEstablishedEventArgs);
}

impl <'a> FTPClient<'a> {
  pub fn on_tls_established(&self) -> &'a dyn FTPClientTLSEstablishedEvent;
  pub fn set_on_tls_established(&mut self, value : &'a dyn FTPClientTLSEstablishedEvent);
  ...
}
```

## Remarks

The struct uses this event to notify the application about a successful completion of a TLS handshake.

The *Version*, *Ciphersuite*, and *ConnectionId* parameters indicate the security parameters of the new connection. Use the *Abort* parameter if you need to terminate the connection at this stage.

# on_tls_handshake event ([FTPClient](#struct-secureblackboxftpclient) Struct)

Fires when a new TLS handshake is initiated, before the handshake commences.

## Syntax

*Rust Syntax*

```text
// FTPClientTLSHandshakeEventArgs carries the FTPClient TLSHandshake event's parameters.
pub struct FTPClientTLSHandshakeEventArgs {
  fn host(&self) -> &String
  fn abort(&self) -> bool
  fn set_abort(&self, value : bool)
}

// FTPClientTLSHandshakeEvent defines the signature of the FTPClient TLSHandshake event's handler function.
pub trait FTPClientTLSHandshakeEvent {
  fn on_tls_handshake(&self, sender : FTPClient, e : &mut FTPClientTLSHandshakeEventArgs);
}

impl <'a> FTPClient<'a> {
  pub fn on_tls_handshake(&self) -> &'a dyn FTPClientTLSHandshakeEvent;
  pub fn set_on_tls_handshake(&mut self, value : &'a dyn FTPClientTLSHandshakeEvent);
  ...
}
```

## Remarks

The struct uses this event to notify the application about the start of a new TLS handshake to *Host*. If the handshake is successful, this event will be followed by the [on_tls_established](#on_tls_established-event-ftpclient-struct) event. If the server chooses to request a client certificate, the [on_tls_cert_needed](#on_tls_cert_needed-event-ftpclient-struct) event will also be fired.

# on_tls_psk event ([FTPClient](#struct-secureblackboxftpclient) Struct)

Notifies the application about the PSK key exchange.

## Syntax

*Rust Syntax*

```text
// FTPClientTLSPSKEventArgs carries the FTPClient TLSPSK event's parameters.
pub struct FTPClientTLSPSKEventArgs {
  fn host(&self) -> &String
  fn hint(&self) -> &String
}

// FTPClientTLSPSKEvent defines the signature of the FTPClient TLSPSK event's handler function.
pub trait FTPClientTLSPSKEvent {
  fn on_tls_psk(&self, sender : FTPClient, e : &mut FTPClientTLSPSKEventArgs);
}

impl <'a> FTPClient<'a> {
  pub fn on_tls_psk(&self) -> &'a dyn FTPClientTLSPSKEvent;
  pub fn set_on_tls_psk(&mut self, value : &'a dyn FTPClientTLSPSKEvent);
  ...
}
```

## Remarks

The struct fires this event to notify the application about the beginning of TLS-PSK key exchange with *Host*. The *Hint* parameter may be used by the server to identify the key or service to use. Use the PreSharedKey field of tls_settings to provide the pre-shared key to the component.

# on_tls_shutdown event ([FTPClient](#struct-secureblackboxftpclient) Struct)

Reports the graceful closure of a TLS connection.

## Syntax

*Rust Syntax*

```text
// FTPClientTLSShutdownEventArgs carries the FTPClient TLSShutdown event's parameters.
pub struct FTPClientTLSShutdownEventArgs {
  fn host(&self) -> &String
}

// FTPClientTLSShutdownEvent defines the signature of the FTPClient TLSShutdown event's handler function.
pub trait FTPClientTLSShutdownEvent {
  fn on_tls_shutdown(&self, sender : FTPClient, e : &mut FTPClientTLSShutdownEventArgs);
}

impl <'a> FTPClient<'a> {
  pub fn on_tls_shutdown(&self) -> &'a dyn FTPClientTLSShutdownEvent;
  pub fn set_on_tls_shutdown(&mut self, value : &'a dyn FTPClientTLSShutdownEvent);
  ...
}
```

## Remarks

This event notifies the application about the closure of an earlier established TLS connection. Note that only graceful connection closures are reported.

# Config Settings ([FTPClient](#struct-secureblackboxftpclient) Struct)

 The struct accepts one or more of the following *configuration settings*. Configuration settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the struct, access to these *internal properties* is provided through the [config](#config-method-ftpclient-struct) method.

### FTPClient Config Settings

**AccountInfo**: Provides the value to be used with ACCT command.Specifies an additional authentication value to be passed to the server with the ACCT command.

**AuthCmd**: Authorization command to be used to request an explicit SSL session.Use this property to specify the authorization command that will be used to request an explicit SSL session. The following choices are possible: 0 - Auto, 1 - TLS, 2 - SSL, 3 - TLSP, 4 - TLSC. Different servers support different commands, so in most cases it is a good idea to set this property to 0.

**CachedCRLMaxAge**: Specifies the maximum age of a cached CRL.Use this setting to specify the maximum number of seconds that may pass since a CRL was added to the global cache. When the cached CRL is older than this value, it is disregarded and a new CRL should be fetched.

The default value is 0, which disables the absolute CRL age check. See [RevocationCacheAgePolicy](#RevocationCacheAgePolicy) for configuring this setting together with the related cached revocation freshness settings.

**CachedCRLMaxAgeRatio**: Specifies the maximum age of a cached CRL as a percentage of its remaining lifetime.Use this setting to specify the percentage of the CRL's remaining lifetime, measured from the time the CRL was added to the global cache to the CRL's NextUpdate. When this portion of the remaining lifetime has passed, the cached CRL is disregarded and a new CRL should be fetched.

The default value is 0, which disables the CRL ratio check. Values are interpreted in the 0..100 range. See [RevocationCacheAgePolicy](#RevocationCacheAgePolicy) for configuring this setting together with the related cached revocation freshness settings.

**CachedCRLOverlapTime**: Specifies the time period before a cached CRL's NextUpdate when it is considered stale and must be refreshed.Use this setting to specify the number of seconds before the NextUpdate time at which the cached CRL should be disregarded, and a new CRL should be fetched.

The default value is 0, which disables the CRL overlap check. See [RevocationCacheAgePolicy](#RevocationCacheAgePolicy) for configuring this setting together with the related cached revocation freshness settings.

This setting is evaluated independently from [CachedCRLMaxAge](#CachedCRLMaxAge) and [CachedCRLMaxAgeRatio](#CachedCRLMaxAgeRatio). If several cached CRL freshness settings are enabled, the cached CRL is used only if it satisfies all of them.

**CachedOCSPResponseMaxAge**: Specifies the maximum age of a cached OCSP response.Use this setting to specify the maximum number of seconds that may pass since an OCSP response was added to the global cache. When the cached OCSP response is older than this value, it is disregarded and a new OCSP response should be fetched.

The default value is 0, which disables the absolute OCSP response age check. This setting is also used to limit open-ended OCSP responses that do not have NextUpdate. See [RevocationCacheAgePolicy](#RevocationCacheAgePolicy) for configuring this setting together with the related cached revocation freshness settings.

**CachedOCSPResponseMaxAgeRatio**: Specifies the maximum age of a cached OCSP response as a percentage of its remaining lifetime.Use this setting to specify the percentage of the OCSP response's remaining lifetime, measured from the time the OCSP response was added to the global cache to the response's NextUpdate. When this portion of the remaining lifetime has passed, the cached OCSP response is disregarded and a new OCSP response should be fetched.

The default value is 0, which disables the OCSP response ratio check. Values are interpreted in the 0..100 range. Open-ended OCSP responses without NextUpdate ignore this setting; use [CachedOCSPResponseMaxAge](#CachedOCSPResponseMaxAge) to limit their age. See [RevocationCacheAgePolicy](#RevocationCacheAgePolicy) for configuring this setting together with the related cached revocation freshness settings.

**CachedOCSPResponseOverlapTime**: Specifies the time period before a cached OCSP response's NextUpdate when it is considered stale and must be refreshed.Use this setting to specify the number of seconds before the NextUpdate time at which the cached OCSP response should be disregarded, and a new OCSP response should be fetched.

The default value is 0, which disables the OCSP response overlap check. See [RevocationCacheAgePolicy](#RevocationCacheAgePolicy) for configuring this setting together with the related cached revocation freshness settings.

This setting is evaluated independently from [CachedOCSPResponseMaxAge](#CachedOCSPResponseMaxAge) and [CachedOCSPResponseMaxAgeRatio](#CachedOCSPResponseMaxAgeRatio). If several cached OCSP response freshness settings are enabled, the cached OCSP response is used only if it satisfies all of them.

**CaseConversion**: Whether file names and paths should be case-converted.Defines whether file names are converted (on the destination system) to: lowercase (1), uppercase (2).

**CaseSensitive**: Specifies if file paths are case-sensitive.Set this property to True if all file names, paths and file masks should be case-sensitive.

**CloseQuietly**: Set this to true to avoid sending QUIT command on session closure.Set this property to true to tell the component not to send the QUIT command when closing the connection.

**ConcurrentConnections**: Number of simultaneous connections for download.The maximum number of concurrent connections that may be opened for download. This feature is not available if the server does not support file size requests.

**ControlChannelLog**: Returns the control channel connection log.Use this setting to retrieve the control channel connection log, similar to the logs produced by typical FTP clients and servers. Any sensitive data, such as passwords, will be hidden.

**CopyMode**: Tunes up the post-transfer action for batch uploads.Use this setting to adjust the post-transfer action for files that are uploaded or downloaded as part of a batch.

The following values are supported:

- 0 (the default setting) - no post-transfer action.
- 1 - delete each file immediately after it has been transferred to the destination system.
- 2 - delete all the original files after all the files have been transferred to the destination system.

 The difference between modes 1 and 2 is about error management. In the latter case, any (and all) files will only be deleted if the entire batch has been transferred successfully. Any transfer error that happens in the middle cancels the deletion.

In the former case, each file is deleted right after it has been transferred, independently of the outcome of transfer of other items in the batch.

Note that this setting only applies to batch (multi-file_ transfers. It has no effect on single-file transfers.

**DataPort**: Sets a specific listening port for active mode data connection.Use this property to provide a specific listening port to be used for data transfer.

**DataPortRangeFilter**: Provides a flexible mechanism to set multiple active mode data port ranges.Use this property to provide multiple data port ranges to be used for active mode transfers. This configuration setting accepts a comma-separated list of ranges or individual port numbers. Make sure that all the port ranges are mutually exclusive and none of any two ranges intersect. Example: 1500,1505-1512,1520,1521-1531.

**DataPortRangeFrom**: Sets the lower boundary for Active mode data port range.This setting specifies the lower boundary for the listening port range to be used for data transfers in active mode.

**DataPortRangeTo**: Sets the upper boundary for Active mode data port range.This setting specifies the upper boundary for the listening port range to be used for data transfers in active mode.

**DeltaCRLPreference**: Specifies whether complete or delta CRLs are preferred.Use this setting to specify which CRL type should be preferred during TLS certificate revocation checks.

The default value is **dcrlpPreferDelta** (0).

Supported values:

- **dcrlpPreferDelta** (0): retrieve and use delta CRLs when available, falling back to complete CRLs when needed.
- **dcrlpPreferComplete** (1): try complete CRLs first, and use delta CRLs only if complete CRLs cannot be retrieved.

**ErrorOrigin**: Specifies whether the error is local or remote.Use this property to check where the error took place.

**ErrorSeverity**: Specifies whether the error is fatal.Use this property to check whether the error is fatal or not.

**EvaluateSystemTrust**: Enables or disables usage of the platform's built-in trust validation facilities.Enable this property to delegate the chain validation to the operating system's native trust evaluation mechanism (e.g. SecTrustEvaluate on Apple platforms). This functionality is currently available on macOS and iOS systems only. This property is enabled by default.

**EventOrigin**: Indicates the channel that has fired the event.Check this read-only property in event handlers to identify whether the event originates from the FTP protocol's control or data channel. While some events are channel-independent (FileOperation, ListEntry), and some other are explicitly bound to the control channel (ControlSend, ControlReceive), some events may be thrown from either. Two examples of such events are CertificateValidate and RemoteSign. The property can be set to one of the following values: feoUnknown (0), feoControl (1), feoData (2).

**ExtHOSTSupported**: Whether HOST extension is supported.Use this read-only property to check whether the FTP server supports HOST command.

**ExtMDTMSupported**: Whether MDTM extension is supported.Use this read-only property to check whether the FTP server supports MDTM command. The MDTM command is used to determine file modification date.

**ExtMFMTSupported**: Whether MFMT extension is supported.Use this read-only property to check whether the FTP server supports MFMT (Modify Fact: Modification Time) command.

**ExtMLSTSupported**: Whether MLST extension is supported.Use this read-only property to check whether the FTP server supports MLST command. This command lists the directory contents on the server, although it is different from the LIST command. In particular, MLST reply has a strictly defined format.

**ExtOPTSUTF8Supported**: Whether OPTS UTF8 extension is supported.Use this read-only property to check whether the FTP server supports OPTS UTF8 ON command. This command switches the server to UTF8.

**ExtRESTSupported**: Whether REST extension is supported.Use this read-only property to check whether the FTP server supports REST (RESTART) command.

**ExtSIZESupported**: Whether SIZE extension is supported.Use this read-only property to check whether the FTP server supports SIZE command. This command returns file size.

**ExtXCRCSupported**: Whether XCRC extension is supported.Use this read-only property to check whether the FTP server supports XCRC command. It calculates a CRC checksum of the file to check its integrity during transfer.

**ExtXMD5Supported**: Whether XMD5 extension is supported.Use this read-only property to check whether the FTP server supports XMD5 command. It calculates an MD5 checksum of a file to check its integrity during transfer.

**ExtXSHA1Supported**: TBD.TBD

**FTPBufferSize**: Buffer size in binary mode.The size of the memory buffer used for data transfer in binary mode. Changing the buffer size may increase (or, on the contrary, decrease) the speed of file download/upload.

**FTPTextBufferSize**: Buffer size in text mode.The size of the memory buffer used for data transfer in text mode. Changing the buffer size may increase (or, on the contrary, decrease) the speed of file download/upload.

**IgnoreSystemTrust**: Whether trusted Windows Certificate Stores should be treated as trusted.Specifies whether, during chain validation, the struct should respect the trust to CA certificates as configured in the operating system. In Windows this effectively defines whether the struct should trust the certificates residing in the Trusted Root Certification Authorities store.

If [IgnoreSystemTrust](#IgnoreSystemTrust) is True, certificates residing in the trusted root store are treated as if they are known, rather than trusted. Only certificates provided via other means (such as the trusted_certificates property) are considered trusted.

**ListenTimeout**: Listening socket timeout.The maximum time during which the listening socket will be opened in the active mode. If there is no connection request from the server during this time, the transfer operation will be canceled.

**LocalNewLineConvention**: A character string for the end of line (EOL) indication on the local machine.This property contains a character string for the end of line (EOL) indication on the local machine. Defines the local newline convention.Contains character string for the end of string indication used on the local machine. During file upload all the LocalNewLineConvention line endings are converted to newline endings used on the server. Correspondingly, for all downloaded files line endings are replaced with LocalNewLineConvention line endings. Line ending conventions are only used in text transfer mode.

**LocalNewLineConvention**: A character string for the end of line (EOL) indication on the local machine.This property contains a character string for the end of line (EOL) indication on the local machine. Defines the local newline convention.Contains character string for the end of string indication used on the local machine. During file upload all the LocalNewLineConvention line endings are converted to newline endings used on the server. Correspondingly, for all downloaded files line endings are replaced with LocalNewLineConvention line endings. Line ending conventions are only used in text transfer mode.

**MinSizeForConcurrentDownload**: Files bigger than this size will be downloaded concurrently.The minimum size of the file for which the concurrent download is used. The value of ConcurrentConnections property is ignored for smaller files.

**ModeZ**: Enables or disables data compression.Use this setting to enable to disable Mode Z (data compression).

**Options**: Various FTP options.Various options of FTP connection.

**RevocationCacheAgePolicy**: Specifies a preset policy for cached CRL and OCSP response freshness settings.Use this setting to configure all cached revocation freshness settings at once. The default value is Disabled.

Supported values are case-insensitive:

|  |  |
| --- | --- |
| Disabled | Sets [CachedCRLOverlapTime](#CachedCRLOverlapTime), [CachedOCSPResponseOverlapTime](#CachedOCSPResponseOverlapTime), [CachedCRLMaxAge](#CachedCRLMaxAge), [CachedOCSPResponseMaxAge](#CachedOCSPResponseMaxAge), [CachedCRLMaxAgeRatio](#CachedCRLMaxAgeRatio), and [CachedOCSPResponseMaxAgeRatio](#CachedOCSPResponseMaxAgeRatio) to 0. This value is the default. It only disables the cache-age freshness policy; it does not disable revocation checking or use of the revocation cache. |
| Default | Applies the component default freshness settings. For this component, Default is equivalent to Disabled. |
| Short | Uses crl:43200;50;300,ocsp:1800;50;300. This means: CRL maximum age 12 hours, CRL age ratio 50%, CRL overlap 5 minutes; OCSP response maximum age 30 minutes, OCSP response age ratio 50%, OCSP response overlap 5 minutes. |
| Long | Uses crl:518400;50;3600,ocsp:21600;50;3600. This means: CRL maximum age 6 days, CRL age ratio 50%, CRL overlap 1 hour; OCSP response maximum age 6 hours, OCSP response age ratio 50%, OCSP response overlap 1 hour. |
| N | Interprets N as an integer number of seconds. The overlap settings are set to N seconds, CRL maximum age is set to N * 144, OCSP response maximum age is set to N * 6, and both ratio settings are set to 50. |
| crl:<maxAge>;<ratio>;<overlap>,ocsp:<maxAge>;<ratio>;<overlap> | Sets the CRL and OCSP response freshness values explicitly. |

Ratios must be in the 0..100 range. Maximum age and overlap values must be non-negative. Short and Long are time-scale profiles: Long allows older cached revocation information by increasing maximum ages, but also uses a larger pre-expiry safety margin by increasing overlap times. For individual [CachedCRLOverlapTime](#CachedCRLOverlapTime), [CachedOCSPResponseOverlapTime](#CachedOCSPResponseOverlapTime), [CachedCRLMaxAge](#CachedCRLMaxAge), [CachedOCSPResponseMaxAge](#CachedOCSPResponseMaxAge), [CachedCRLMaxAgeRatio](#CachedCRLMaxAgeRatio), and [CachedOCSPResponseMaxAgeRatio](#CachedOCSPResponseMaxAgeRatio) settings, a value of 0 disables the corresponding freshness check. The individual settings remain available for advanced configuration and can be used after this setting to override specific values.

**StaticDNS**: Specifies whether static DNS rules should be used.Set this property to enable or disable static DNS rules for the struct. Works only if *UseOwnDNSResolver* is set to *true*.

Supported values are:

|  |  |  |
| --- | --- | --- |
| none |  | No static DNS rules (default) |
| local |  | Local static DNS rules |
| global |  | Global static DNS rules |

**StaticIPAddress[domain]**: Gets or sets an IP address for the specified domain name.Use this property to get or set an IP address for the specified domain name in the internal (of the struct) or global DNS rules storage depending on the *StaticDNS* value. The type of the IP address (IPv4 or IPv6) is determined automatically. If both addresses are available, they are divided by the | (pipe) character.

**StaticIPAddresses**: Gets or sets all the static DNS rules.Use this property to get static DNS rules from the current rules storage or restore them back between application sessions. If *StaticDNS* of the struct is set to "*local*", the property returns/restores the rules from/to the internal storage of the struct. If *StaticDNS* of the struct is set to "*global*", the property returns/restores the rules from/to the GLOBAL storage. The rules list is returned and accepted in JSON format.

**TempPath**: Path for storing temporary files.This setting specifies an absolute path to the location on disk where temporary files are stored. This setting is supported only in the Java edition for all applicable signing components except [PDFSigner](PDFSigner.md#PDFSigner), where this limitation does not apply.

**TLSCiphersuites**: Returns the list of ciphersuites activated in the component for the current session.Check this property to enumerate the list of TLS ciphersuites enabled in the component. A good place to do that is OnTLSHandshake event handler.

**TLSExtensions**: TBD.TBD

**TLSGroups**: Returns the list of TLS key exchange groups enabled in the component.Check this property to enumerate the list of TLS key exchange groups enabled in the component.

**TLSLayerKeepAlives**: Enables or disables keep alive signals on the TLS layer.Normally FTP environments choose FTP-level keep-alive commands (NOOP). However, in some cases (firewalls, buggy servers) it may be necessary to implement keep-alives at lower level. Use this setting to enable TLS-layer keep-alive packets.

**TLSPeerExtensions**: TBD.TBD

**TLSSessionGroup**: Specifies the group name of TLS sessions to be used for session resumption.Use this property to limit the search of cached TLS sessions to the specified group. Sessions from other groups will be ignored. By default, all sessions are cached with an empty group name and available to all the structs.

**TLSSessionLifetime**: Specifies lifetime in seconds of the cached TLS session.Use this property to specify how much time the TLS session should be kept in the session cache. After this time, the session expires and will be automatically removed from the cache. Default value is 300 seconds (5 minutes).

**TLSSessionPurgeInterval**: Specifies how often the session cache should remove the expired TLS sessions.Use this property to specify the time interval of purging the expired TLS sessions from the session cache. Default value is 60 seconds (1 minute).

**TLSVersions**: Returns the list of TLS versions enabled in the component.Check this property to obtain the list of TLS versions enabled in the component, as an integer bitmask.

**TolerateMinorChainIssues**: Whether to tolerate minor chain issues.This parameter controls whether the chain validator should tolerate minor technical issues when validating the chain. Those are:

- CA, revocation source, TLS key usage requirements are not mandated
- Violation of OCSP issuer requirements are ignored
- The AuthorityKeyID extension in CRL- and certificate-issuing CAs are ignored (helps with incorrectly renewed certificates)
- Basic constraints and name constraints of CA certificates are ignored
- Some weaker algorithms are tolerated

**TransferKeepAliveInterval**: Keep-alive interval for the data channel transfers.FTPClient may be configured to send occasional NOOP commands on the control channel to circumvent control channel closures by firewalls due to inactivity. This setting sets the period, in milliseconds, after which another NOOP request is sent. The default value of this property is 0, which stands for no NOOP requests.

**TransferTimeout**: Timeout for data transfer in active mode.In active mode, specifies a time period that a client should wait for incoming data connection (when file or directory listing is to be transferred). If no data connection is accepted during this period, the data connection will be cancelled.

**UseEnvStorages**: Enables or disables use of the environment storages.Enable this property to make the chain validation module automatically look up missing CA and intermediate certificates in the environment storages.

**UseMicrosoftCTL**: Enables or disables the automatic use of the Microsoft online certificate trust list.Enable this property to make the chain validation module automatically look up missing CA certificates in the public Windows Update repository.

**UseProxySettingsForDataChannel**: Whether the proxy settings should be applied to data channel.Whether the proxy settings should be applied to data channel.

**UseSystemCertificates**: Enables or disables the use of the system certificates.Use this property to tell the chain validation module to automatically look up missing CA certificates in the system certificates. In many cases it is beneficial to switch this property on, as the operating system certificate configuration provides a representative trust framework.

**UseUTF8IfAvailable**: Upgrade to UTF8 string encoding if the server supports it.This setting, which is set to true by default, tells the client to activate UTF8 encoding for international strings if the server indicates its support via the UTF8 feature.

### Base Config Settings

**ASN1UseGlobalTagCache**: Controls whether ASN.1 module should use a global object cache.This is a performance setting. It is unlikely that you will ever need to adjust it.

**AssignSystemSmartCardPins**: Specifies whether CSP-level PINs should be assigned to CNG keys.This is a low-level tweak for certain cryptographic providers. It is unlikely that you will ever need to adjust it.

**CheckKeyIntegrityBeforeUse**: Enables or disable private key integrity check before use.This global property enables or disables private key material check before each signing operation. This slows down performance a bit, but prevents a selection of attacks on RSA keys where keys with unknown origins are used.

You can switch this property off to improve performance if your project only uses known, good private keys.

**CookieCaching**: Specifies whether a cookie cache should be used for HTTP(S) transports.Set this property to enable or disable cookies caching for the struct.

Supported values are:

|  |  |  |
| --- | --- | --- |
| off |  | No caching (default) |
| local |  | Local caching |
| global |  | Global caching |

**Cookies**: Gets or sets local cookies for the struct.Use this property to get cookies from the internal cookie storage of the struct and/or restore them back between application sessions.

**DefDeriveKeyIterations**: Specifies the default key derivation algorithm iteration count.This global property sets the default number of iterations for all supported key derivation algorithms. Note that you can provide the required number of iterations by using properties of the relevant key generation component; this global setting is used in scenarios where specific iteration count is not or cannot be provided.

**DNSLocalSuffix**: The suffix to assign for TLD names.Use this global setting to adjust the default suffix to assign to top-level domain names. The default is *.local*.

**EnableClientSideSSLFFDHE**: Enables or disables finite field DHE key exchange support in TLS clients.This global property enables or disables support for finite field DHE key exchange methods in TLS clients. FF DHE is a slower algorithm if compared to EC DHE; enabling it may result in slower connections.

This setting only applies to sessions negotiated with TLS version 1.3.

**EnableSSHMLKEM**: Enables support for ML-KEM/hybrid key exchange algorithms in SSH client and server components.Use this setting to enable hybrid key exchange algorithms in client and server SSH and SFTP components. This is a global setting that enables ML-KEM blanketly in all SSH-dependent components.

**EnableTLSMLKEM**: Enables support for ML-KEM and hybrid groups in TLS client and server components.Use this setting to enable ML-KEM and hybrid key exchange groups in client and server TLS components. This is a global setting that enables ML-KEM blanketly in all TLS-dependent components.

**GlobalCookies**: Gets or sets global cookies for all the HTTP transports.Use this property to get cookies from the GLOBAL cookie storage or restore them back between application sessions. These cookies will be used by all the structs that have its *CookieCaching* property set to "global".

**HardwareCryptoUsePolicy**: The hardware crypto usage policy.This global setting controls the hardware cryptography usage policy.

Supported Values:

|  |  |
| --- | --- |
| auto | Use hardware cryptography if available; otherwise, fall back to software-based cryptography (default). |
| enable | Always attempt to use hardware cryptography. If unavailable, exception will be thrown. |
| disable | Do not use hardware cryptography. |

**HttpUserAgent**: Specifies the user agent name to be used by all HTTP clients.This global setting defines the User-Agent field of the HTTP request provides information about the software that initiates the request. This value will be used by all the HTTP clients including the ones used internally in other structs.

**HttpVersion**: The HTTP version to use in any inner HTTP client components created.Set this property to 1.0 or 1.1 to indicate the HTTP version that any internal HTTP clients should use.

**IgnoreExpiredMSCTLSigningCert**: Whether to tolerate the expired Windows Update signing certificate.It is not uncommon for Microsoft Windows Update Certificate Trust List to be signed with an expired Microsoft certificate. Setting this global property to true makes SBB ignore the expired factor and take the Trust List into account.

**ListDelimiter**: The delimiter character for multi-element lists.Allows to set the delimiter for any multi-entry values returned by the component as a string object, such as file lists. For most of the components, this property is set to a newline sequence.

**LogDestination**: Specifies the debug log destination.Contains a comma-separated list of values that specifies where debug log should be dumped.

Supported values are:

|  |  |  |
| --- | --- | --- |
| file |  | File |
| console |  | Console |
| systemlog |  | System Log (supported for Android only) |
| debugger |  | Debugger (supported for VCL for Windows and .Net) |

**LogDetails**: Specifies the debug log details to dump.Contains a comma-separated list of values that specifies which debug log details to dump.

Supported values are:

|  |  |  |
| --- | --- | --- |
| time |  | Current time |
| level |  | Level |
| package |  | Package name |
| module |  | Module name |
| class |  | Class name |
| method |  | Method name |
| threadid |  | Thread Id |
| contenttype |  | Content type |
| content |  | Content |
| all |  | All details |

**LogFile**: Specifies the debug log filename.Use this property to provide a path to the log file.

**LogFilters**: Specifies the debug log filters.Contains a comma-separated list of value pairs ("name:value") that describe filters.

Supported filter names are:

|  |  |  |
| --- | --- | --- |
| exclude-package |  | Exclude a package specified in the value |
| exclude-module |  | Exclude a module specified in the value |
| exclude-class |  | Exclude a class specified in the value |
| exclude-method |  | Exclude a method specified in the value |
| include-package |  | Include a package specified in the value |
| include-module |  | Include a module specified in the value |
| include-class |  | Include a class specified in the value |
| include-method |  | Include a method specified in the value |

**LogFlushMode**: Specifies the log flush mode.Use this property to set the log flush mode. The following values are defined:

|  |  |  |
| --- | --- | --- |
| none |  | No flush (caching only) |
| immediate |  | Immediate flush (real-time logging) |
| maxcount |  | Flush cached entries upon reaching LogMaxEventCount entries in the cache. |

**LogLevel**: Specifies the debug log level.Use this property to provide the desired debug log level.

Supported values are:

|  |  |  |
| --- | --- | --- |
| none |  | None (by default) |
| fatal |  | Severe errors that cause premature termination. |
| error |  | Other runtime errors or unexpected conditions. |
| warning |  | Use of deprecated APIs, poor use of API, 'almost' errors, other runtime situations that are undesirable or unexpected, but not necessarily "wrong". |
| info |  | Interesting runtime events (startup/shutdown). |
| debug |  | Detailed information on flow of through the system. |
| trace |  | More detailed information. |

**LogMaxEventCount**: Specifies the maximum number of events to cache before further action is taken.Use this property to specify the log event number threshold. This threshold may have different effects, depending on the rotation setting and/or the flush mode.

The default value of this setting is 100.

**LogRotationMode**: Specifies the log rotation mode.Use this property to set the log rotation mode. The following values are defined:

|  |  |  |
| --- | --- | --- |
| none |  | No rotation |
| deleteolder |  | Delete older entries from the cache upon reaching LogMaxEventCount |
| keepolder |  | Keep older entries in the cache upon reaching LogMaxEventCount (newer entries are discarded) |

**MaxASN1BufferLength**: Specifies the maximal allowed length for ASN.1 primitive tag data.This global property limits the maximal allowed length for ASN.1 tag data for non-content-carrying structures, such as certificates, CRLs, or timestamps. It does not affect structures that can carry content, such as CMS/CAdES messages. This is a security property aiming at preventing DoS attacks.

**MaxASN1TreeDepth**: Specifies the maximal depth for processed ASN.1 trees.This global property limits the maximal depth of ASN.1 trees that the component can handle without throwing an error. This is a security property aiming at preventing DoS attacks.

**OCSPHashAlgorithm**: Specifies the hash algorithm to be used to identify certificates in OCSP requests.This global setting defines the hash algorithm to use in OCSP requests during chain validation. Some OCSP responders can only use older algorithms, in which case setting this property to SHA1 may be helpful.

**OldClientSideRSAFallback**: Specifies whether the SSH client should use a SHA1 fallback.Tells the SSH client to use a legacy ssh-rsa authentication even if the server indicates support for newer algorithms, such as rsa-sha-256. This is a backward-compatibility tweak.

**PKICache**: Specifies which PKI elements (certificates, CRLs, OCSP responses) should be cached.The PKICache setting specifies which Public Key Infrastructure (PKI) elements should be cached to optimize performance and reduce retrieval times. It supports comma-separated values to indicate the specific types of PKI data that should be cached.

Supported Values:

|  |  |
| --- | --- |
| certificate | Enables caching of certificates. |
| crl | Enables caching of Certificate Revocation Lists (CRLs). |
| ocsp | Enables caching of OCSP (Online Certificate Status Protocol) responses. |

Example (default value):

```text
PKICache=certificate,crl,ocsp
```

 In this example, the component caches certificates, CRLs, and OCSP responses.

**PKICachePath**: Specifies the file system path where cached PKI data is stored.The PKICachePath setting defines the file system path where cached PKI data (e.g., certificates, CRLs, OCSP responses and Trusted Lists) will be stored. This allows the system to persistently save and retrieve PKI cache data, even across application restarts.

The default value is an empty string - no cached PKI data is stored on disk.

Example:

```text
PKICachePath=C:\Temp\cache
```

 In this example, the cached PKI data is stored in the C:\Temp\cache directory.

**ProductVersion**: Returns the version of the SecureBlackbox library.This property returns the long version string of the SecureBlackbox library being used (major.minor.build.revision).

**ServerSSLDHKeyLength**: Sets the size of the TLS DHE key exchange group.Use this property to adjust the length, in bits, of the DHE prime to be used by the TLS server.

**StaticDNS**: Specifies whether static DNS rules should be used.Set this property to enable or disable static DNS rules for the struct. Works only if *UseOwnDNSResolver* is set to *true*.

Supported values are:

|  |  |  |
| --- | --- | --- |
| none |  | No static DNS rules (default) |
| local |  | Local static DNS rules |
| global |  | Global static DNS rules |

**StaticIPAddress[domain]**: Gets or sets an IP address for the specified domain name.Use this property to get or set an IP address for the specified domain name in the internal (of the struct) or global DNS rules storage depending on the *StaticDNS* value. The type of the IP address (IPv4 or IPv6) is determined automatically. If both addresses are available, they are divided by the | (pipe) character.

**StaticIPAddresses**: Gets or sets all the static DNS rules.Use this property to get static DNS rules from the current rules storage or restore them back between application sessions. If *StaticDNS* of the struct is set to "*local*", the property returns/restores the rules from/to the internal storage of the struct. If *StaticDNS* of the struct is set to "*global*", the property returns/restores the rules from/to the GLOBAL storage. The rules list is returned and accepted in JSON format.

**Tag**: Allows to store any custom data.Use this config property to store any custom data.

**TLSSessionGroup**: Specifies the group name of TLS sessions to be used for session resumption.Use this property to limit the search of cached TLS sessions to the specified group. Sessions from other groups will be ignored. By default, all sessions are cached with an empty group name and available to all the structs.

**TLSSessionLifetime**: Specifies lifetime in seconds of the cached TLS session.Use this property to specify how much time the TLS session should be kept in the session cache. After this time, the session expires and will be automatically removed from the cache. Default value is 300 seconds (5 minutes).

**TLSSessionPurgeInterval**: Specifies how often the session cache should remove the expired TLS sessions.Use this property to specify the time interval of purging the expired TLS sessions from the session cache. Default value is 60 seconds (1 minute).

**UseCRLObjectCaching**: Specifies whether reuse of loaded CRL objects is enabled.This setting enables or disables the caching of CRL objects. When set to true (the default value), the system checks if a CRL object is already loaded in memory before attempting to load a new instance. If the object is found, the existing instance is reused, and its reference count is incremented to track its usage. When the reference count reaches zero, indicating that no references to the object remain, the system will free the object from memory. This setting enhances performance by minimizing unnecessary object instantiation and promotes efficient memory management, particularly in scenarios where CRL objects are frequently used.

**UseInternalRandom**: Switches between SecureBlackbox-own and platform PRNGs.Allows to switch between internal/native PRNG implementation and the one provided by the platform.

**UseLegacyAdESValidation**: Enables legacy AdES validation mode.Use this setting to switch the AdES component to the validation approach that was used in SBB 2020/SBB 2022 (less attention to temporal details).

**UseOCSPResponseObjectCaching**: Specifies whether reuse of loaded OCSP response objects is enabled.This setting enables or disables the caching of OCSP response objects. When set to true (the default value), the system checks if a OCSP response object is already loaded in memory before attempting to load a new instance. If the object is found, the existing instance is reused, and its reference count is incremented to track its usage. When the reference count reaches zero, indicating that no references to the object remain, the system will free the object from memory. This setting enhances performance by minimizing unnecessary object instantiation and promotes efficient memory management, particularly in scenarios where OCSP response objects are frequently used.

**UseOwnDNSResolver**: Specifies whether the client components should use own DNS resolver.Set this global property to false to force all the client components to use the DNS resolver provided by the target OS instead of using own one.

**UseSharedSystemStorages**: Specifies whether the validation engine should use a global per-process copy of the system certificate stores.Set this global property to false to make each validation run use its own copy of system certificate stores.

**UseSystemNativeSizeCalculation**: An internal CryptoAPI access tweak.This is an internal setting. Please do not use it unless instructed by the support team.

**UseSystemOAEPAndPSS**: Enforces or disables the use of system-driven RSA OAEP and PSS computations.This global setting defines who is responsible for performing RSA-OAEP and RSA-PSS computations where the private key is stored in a Windows system store and is exportable. If set to true, SBB will delegate the computations to Windows via a CryptoAPI call. Otherwise, it will export the key material and perform the computations using its own OAEP/PSS implementation.

This setting only applies to certificates originating from a Windows system store.

**UseSystemRandom**: Enables or disables the use of the OS PRNG.Use this global property to enable or disable the use of operating system-driven pseudorandom number generation.

**XMLRDNDescriptorName[OID]**: Defines an OID mapping to descriptor names for the certificate's IssuerRDN or SubjectRDN.This property defines custom mappings between Object Identifiers (OIDs) and descriptor names. This mapping specifies how the certificate's issuer and subject information (ds:IssuerRDN and ds:SubjectRDN elements respectively) are represented in XML signatures.

The property accepts comma-separated values where the first descriptor name is used when the OID is mapped, and subsequent values act as aliases for parsing.

Syntax:

```text
Config("XMLRDNDescriptorName[OID]=PrimaryName,Alias1,Alias2");
```

Where:

OID: The Object Identifier from the certificate's IssuerRDN or SubjectRDN that you want to map.

PrimaryName: The main descriptor name used in the XML signature when the OID is encountered.

Alias1, Alias2, ...: Optional alternative names recognized during parsing.

Usage Examples:

Map OID 2.5.4.5 to SERIALNUMBER:

```text
Config("XMLRDNDescriptorName[2.5.4.5]=SERIALNUMBER");
```

Map OID 1.2.840.113549.1.9.1 to E, with aliases EMAIL and EMAILADDRESS:

```text
Config("XMLRDNDescriptorName[1.2.840.113549.1.9.1]=E,EMAIL,EMAILADDRESS");
```

**XMLRDNDescriptorPriority[OID]**: Specifies the priority of descriptor names associated with a specific OID.This property specifies the priority of descriptor names associated with a specific OID that allows to reorder descriptors in the ds:IssuerRDN and ds:SubjectRDN elements during signing.

**XMLRDNDescriptorReverseOrder**: Specifies whether to reverse the order of descriptors in RDN.Specifies whether to reverse the order of descriptors in the ds:IssuerRDN and ds:SubjectRDN elements during XML signing. By default, this property is set to true (as specified in RFC 2253, 2.1).

**XMLRDNDescriptorSeparator**: Specifies the separator used between descriptors in RDN.Specifies the separator used between descriptors in the ds:IssuerRDN and ds:SubjectRDN elements during XML signing. By default, this property is set to ", " value.

# Trappable Errors ([FTPClient](#struct-secureblackboxftpclient) Struct)

### FTPClient Errors

|  |  |
| --- | --- |
| 1048577 | Invalid parameter ([SB_ERROR_INVALID_PARAMETER](constants.md#const_SBERRORINVALIDPARAMETER)) |
| 1048578 | Invalid configuration ([SB_ERROR_INVALID_SETUP](constants.md#const_SBERRORINVALIDSETUP)) |
| 1048579 | Invalid state ([SB_ERROR_INVALID_STATE](constants.md#const_SBERRORINVALIDSTATE)) |
| 1048580 | Invalid value ([SB_ERROR_INVALID_VALUE](constants.md#const_SBERRORINVALIDVALUE)) |
| 1048581 | Private key not found ([SB_ERROR_NO_PRIVATE_KEY](constants.md#const_SBERRORNOPRIVATEKEY)) |
| 1048582 | Cancelled by the user ([SB_ERROR_CANCELLED_BY_USER](constants.md#const_SBERRORCANCELLEDBYUSER)) |
| 1048583 | The file was not found ([SB_ERROR_NO_SUCH_FILE](constants.md#const_SBERRORNOSUCHFILE)) |
| 1048584 | Unsupported feature or operation ([SB_ERROR_UNSUPPORTED_FEATURE](constants.md#const_SBERRORUNSUPPORTEDFEATURE)) |
| 1048585 | General error ([SB_ERROR_GENERAL_ERROR](constants.md#const_SBERRORGENERALERROR)) |
| 18874369 | Unsupported file operation ([SB_ERROR_FTP_UNSUPPORTED_FILE_OPERATION](constants.md#const_SBERRORFTPUNSUPPORTEDFILEOPERATION)) |
