# Struct ipworksedi::POP

The POP Struct is used to easily retrieve electronic mail from internet post office servers (POP).

## Syntax

```text
ipworksedi::POP
```

## Remarks

The POP Struct supports both plaintext and Secure Sockets Layer/Transport Layer Security (SSL/TLS) connections (RFC 2595). When connecting over Secure Sockets Layer/Transport Layer Security (SSL/TLS) the [on_ssl_server_authentication](#on_ssl_server_authentication-event-pop-struct) event allows you to check the server identity and other security attributes. The [on_ssl_status](#on_ssl_status-event-pop-struct) event provides information about the SSL handshake. Additional SSL-related settings are also supported through the [config](#config-method-pop-struct) method.

The POP Struct implements a standard internet post office (POP3) client as specified in RFC 1725.

To connect to a [mail_server](#mail_server-property-pop-struct), first set the appropriate [user](#user-property-pop-struct) and [password](#password-property-pop-struct) and then connect by calling the [connect](#connect-method-pop-struct) method. Upon successful connection to the [mail_server](#mail_server-property-pop-struct), the number of waiting messages is shown by the [message_count](#message_count-property-pop-struct) property. A message is selected by setting the [message_number](#message_number-property-pop-struct) property to a number between 1 and [message_count](#message_count-property-pop-struct) (inclusive). Then, the message text and headers are received by calling the [retrieve](#retrieve-method-pop-struct) method.

The message text is received through the [on_transfer](#on_transfer-event-pop-struct) event, whereas the message headers are received through the [on_header](#on_header-event-pop-struct) event. Additionally, up to [max_lines](#max_lines-property-pop-struct) from the message body are provided in the [message_text](#message_text-property-pop-struct) property. The body of the message is also saved in the file specified by the [local_file](#local_file-property-pop-struct) property. [on_start_transfer](#on_start_transfer-event-pop-struct) and [on_end_transfer](#on_end_transfer-event-pop-struct) events are fired at the beginning and end of message transmission. The [on_pi_trail](#on_pi_trail-event-pop-struct) event provides a trace of the interaction between the client and server (excluding message transfers).

### Object Lifetime

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

|  |  |
| --- | --- |
| [auth_mechanism](#auth_mechanism-property-pop-struct) | This property includes the authentication mechanism to be used when connecting to the mail server. |
| [connected](#connected-property-pop-struct) | Whether the struct is connected. |
| [firewall_auto_detect](#firewall_auto_detect-property-pop-struct) | Whether to automatically detect and use firewall system settings, if available. |
| [firewall_type](#firewall_type-property-pop-struct) | The type of firewall to connect through. |
| [firewall_host](#firewall_host-property-pop-struct) | The name or IP address of the firewall (optional). |
| [firewall_password](#firewall_password-property-pop-struct) | A password if authentication is to be used when connecting through the firewall. |
| [firewall_port](#firewall_port-property-pop-struct) | The Transmission Control Protocol (TCP) port for the firewall Host . |
| [firewall_user](#firewall_user-property-pop-struct) | A username if authentication is to be used when connecting through a firewall. |
| [idle](#idle-property-pop-struct) | The current status of the struct. |
| [include_headers](#include_headers-property-pop-struct) | This property instructs the struct to include the headers in the MessageText and LocalFile. |
| [last_reply](#last_reply-property-pop-struct) | This property indicates the last reply received from the server. |
| [local_file](#local_file-property-pop-struct) | This property includes the path to a local file to download the message body. If the file exists, it is overwritten (optional). |
| [local_host](#local_host-property-pop-struct) | The name of the local host or user-assigned IP interface through which connections are initiated or accepted. |
| [mail_port](#mail_port-property-pop-struct) | This property includes the server port for POP (default 110). |
| [mail_server](#mail_server-property-pop-struct) | This property includes the name or address of a mail server (internet post office server). |
| [max_lines](#max_lines-property-pop-struct) | This property includes the maximum number of message lines other than headers to retrieve. |
| [message](#message-property-pop-struct) | This property provides the raw message content. |
| [message_cc](#message_cc-property-pop-struct) | This property includes the value of the CC header of the last retrieved message. |
| [message_count](#message_count-property-pop-struct) | This property includes the number of messages in the mailbox. |
| [message_date](#message_date-property-pop-struct) | This property includes the value of the date header of the last retrieved message. |
| [message_from](#message_from-property-pop-struct) | This property includes the value of the from header of the last retrieved message. |
| [message_header_count](#message_header_count-property-pop-struct) | The number of records in the MessageHeader arrays. |
| [message_header_field](#message_header_field-property-pop-struct) | This property contains the name of the HTTP header (this is the same case as it is delivered). |
| [message_header_value](#message_header_value-property-pop-struct) | This property contains the header contents. |
| [message_headers_string](#message_headers_string-property-pop-struct) | This property includes a string representation of the full headers of the message as retrieved from the server. |
| [message_number](#message_number-property-pop-struct) | This property includes the current (selected) message. |
| [message_recipient_count](#message_recipient_count-property-pop-struct) | The number of records in the MessageRecipient arrays. |
| [message_recipient_address](#message_recipient_address-property-pop-struct) | This property contains the email address of the recipient. |
| [message_recipient_name](#message_recipient_name-property-pop-struct) | This property contains the name of the recipient. |
| [message_recipient_options](#message_recipient_options-property-pop-struct) | This property contains the recipient sending options (used only by SMTP). |
| [message_recipient_type](#message_recipient_type-property-pop-struct) | This property contains the recipient type: To, Cc, or Bcc. |
| [message_reply_to](#message_reply_to-property-pop-struct) | This property includes the value of the Reply-To header of the last retrieved message. |
| [message_subject](#message_subject-property-pop-struct) | This property includes the value of the Subject header of the last retrieved message. |
| [message_text](#message_text-property-pop-struct) | This property includes the full text of the message as retrieved from the server. |
| [message_to](#message_to-property-pop-struct) | This property includes the value of the To header of the last retrieved message. |
| [o_auth_access_token](#o_auth_access_token-property-pop-struct) | The access token returned by the authorization server. |
| [o_auth_authorization_scope](#o_auth_authorization_scope-property-pop-struct) | The scope request or response parameter used during authorization. |
| [o_auth_client_id](#o_auth_client_id-property-pop-struct) | The id of the client assigned when registering the application. |
| [o_auth_client_secret](#o_auth_client_secret-property-pop-struct) | The secret value for the client assigned when registering the application. |
| [o_auth_refresh_token](#o_auth_refresh_token-property-pop-struct) | Specifies the refresh token received from or sent to the authorization server. |
| [o_auth_return_url](#o_auth_return_url-property-pop-struct) | The URL where the user (browser) returns after authenticating. |
| [o_auth_server_auth_url](#o_auth_server_auth_url-property-pop-struct) | The URL of the authorization server. |
| [o_auth_server_token_url](#o_auth_server_token_url-property-pop-struct) | The URL of the token server used to obtain the access token. |
| [password](#password-property-pop-struct) | This property includes the password for the mailbox user. |
| [ssl_accept_server_cert_effective_date](#ssl_accept_server_cert_effective_date-property-pop-struct) | The date on which this certificate becomes valid. |
| [ssl_accept_server_cert_expiration_date](#ssl_accept_server_cert_expiration_date-property-pop-struct) | The date on which the certificate expires. |
| [ssl_accept_server_cert_extended_key_usage](#ssl_accept_server_cert_extended_key_usage-property-pop-struct) | A comma-delimited list of extended key usage identifiers. |
| [ssl_accept_server_cert_fingerprint](#ssl_accept_server_cert_fingerprint-property-pop-struct) | The hex-encoded, 16-byte MD5 fingerprint of the certificate. |
| [ssl_accept_server_cert_fingerprint_sha1](#ssl_accept_server_cert_fingerprint_sha1-property-pop-struct) | The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. |
| [ssl_accept_server_cert_fingerprint_sha256](#ssl_accept_server_cert_fingerprint_sha256-property-pop-struct) | The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. |
| [ssl_accept_server_cert_issuer](#ssl_accept_server_cert_issuer-property-pop-struct) | The issuer of the certificate. |
| [ssl_accept_server_cert_private_key](#ssl_accept_server_cert_private_key-property-pop-struct) | The private key of the certificate (if available). |
| [ssl_accept_server_cert_private_key_available](#ssl_accept_server_cert_private_key_available-property-pop-struct) | Whether a PrivateKey is available for the selected certificate. |
| [ssl_accept_server_cert_private_key_container](#ssl_accept_server_cert_private_key_container-property-pop-struct) | The name of the PrivateKey container for the certificate (if available). |
| [ssl_accept_server_cert_public_key](#ssl_accept_server_cert_public_key-property-pop-struct) | The public key of the certificate. |
| [ssl_accept_server_cert_public_key_algorithm](#ssl_accept_server_cert_public_key_algorithm-property-pop-struct) | The textual description of the certificate's public key algorithm. |
| [ssl_accept_server_cert_public_key_length](#ssl_accept_server_cert_public_key_length-property-pop-struct) | The length of the certificate's public key (in bits). |
| [ssl_accept_server_cert_serial_number](#ssl_accept_server_cert_serial_number-property-pop-struct) | The serial number of the certificate encoded as a string. |
| [ssl_accept_server_cert_signature_algorithm](#ssl_accept_server_cert_signature_algorithm-property-pop-struct) | The text description of the certificate's signature algorithm. |
| [ssl_accept_server_cert_store](#ssl_accept_server_cert_store-property-pop-struct) | The name of the certificate store for the client certificate. |
| [ssl_accept_server_cert_store_password](#ssl_accept_server_cert_store_password-property-pop-struct) | If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store. |
| [ssl_accept_server_cert_store_type](#ssl_accept_server_cert_store_type-property-pop-struct) | The type of certificate store for this certificate. |
| [ssl_accept_server_cert_subject_alt_names](#ssl_accept_server_cert_subject_alt_names-property-pop-struct) | Comma-separated lists of alternative subject names for the certificate. |
| [ssl_accept_server_cert_thumbprint_md5](#ssl_accept_server_cert_thumbprint_md5-property-pop-struct) | The MD5 hash of the certificate. |
| [ssl_accept_server_cert_thumbprint_sha1](#ssl_accept_server_cert_thumbprint_sha1-property-pop-struct) | The SHA-1 hash of the certificate. |
| [ssl_accept_server_cert_thumbprint_sha256](#ssl_accept_server_cert_thumbprint_sha256-property-pop-struct) | The SHA-256 hash of the certificate. |
| [ssl_accept_server_cert_usage](#ssl_accept_server_cert_usage-property-pop-struct) | The text description of UsageFlags . |
| [ssl_accept_server_cert_usage_flags](#ssl_accept_server_cert_usage_flags-property-pop-struct) | The flags that show intended use for the certificate. |
| [ssl_accept_server_cert_version](#ssl_accept_server_cert_version-property-pop-struct) | The certificate's version number. |
| [ssl_accept_server_cert_subject](#ssl_accept_server_cert_subject-property-pop-struct) | The subject of the certificate used for client authentication. |
| [ssl_accept_server_cert_encoded](#ssl_accept_server_cert_encoded-property-pop-struct) | The certificate (PEM/Base64 encoded). |
| [ssl_cert_effective_date](#ssl_cert_effective_date-property-pop-struct) | The date on which this certificate becomes valid. |
| [ssl_cert_expiration_date](#ssl_cert_expiration_date-property-pop-struct) | The date on which the certificate expires. |
| [ssl_cert_extended_key_usage](#ssl_cert_extended_key_usage-property-pop-struct) | A comma-delimited list of extended key usage identifiers. |
| [ssl_cert_fingerprint](#ssl_cert_fingerprint-property-pop-struct) | The hex-encoded, 16-byte MD5 fingerprint of the certificate. |
| [ssl_cert_fingerprint_sha1](#ssl_cert_fingerprint_sha1-property-pop-struct) | The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. |
| [ssl_cert_fingerprint_sha256](#ssl_cert_fingerprint_sha256-property-pop-struct) | The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. |
| [ssl_cert_issuer](#ssl_cert_issuer-property-pop-struct) | The issuer of the certificate. |
| [ssl_cert_private_key](#ssl_cert_private_key-property-pop-struct) | The private key of the certificate (if available). |
| [ssl_cert_private_key_available](#ssl_cert_private_key_available-property-pop-struct) | Whether a PrivateKey is available for the selected certificate. |
| [ssl_cert_private_key_container](#ssl_cert_private_key_container-property-pop-struct) | The name of the PrivateKey container for the certificate (if available). |
| [ssl_cert_public_key](#ssl_cert_public_key-property-pop-struct) | The public key of the certificate. |
| [ssl_cert_public_key_algorithm](#ssl_cert_public_key_algorithm-property-pop-struct) | The textual description of the certificate's public key algorithm. |
| [ssl_cert_public_key_length](#ssl_cert_public_key_length-property-pop-struct) | The length of the certificate's public key (in bits). |
| [ssl_cert_serial_number](#ssl_cert_serial_number-property-pop-struct) | The serial number of the certificate encoded as a string. |
| [ssl_cert_signature_algorithm](#ssl_cert_signature_algorithm-property-pop-struct) | The text description of the certificate's signature algorithm. |
| [ssl_cert_store](#ssl_cert_store-property-pop-struct) | The name of the certificate store for the client certificate. |
| [ssl_cert_store_password](#ssl_cert_store_password-property-pop-struct) | If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store. |
| [ssl_cert_store_type](#ssl_cert_store_type-property-pop-struct) | The type of certificate store for this certificate. |
| [ssl_cert_subject_alt_names](#ssl_cert_subject_alt_names-property-pop-struct) | Comma-separated lists of alternative subject names for the certificate. |
| [ssl_cert_thumbprint_md5](#ssl_cert_thumbprint_md5-property-pop-struct) | The MD5 hash of the certificate. |
| [ssl_cert_thumbprint_sha1](#ssl_cert_thumbprint_sha1-property-pop-struct) | The SHA-1 hash of the certificate. |
| [ssl_cert_thumbprint_sha256](#ssl_cert_thumbprint_sha256-property-pop-struct) | The SHA-256 hash of the certificate. |
| [ssl_cert_usage](#ssl_cert_usage-property-pop-struct) | The text description of UsageFlags . |
| [ssl_cert_usage_flags](#ssl_cert_usage_flags-property-pop-struct) | The flags that show intended use for the certificate. |
| [ssl_cert_version](#ssl_cert_version-property-pop-struct) | The certificate's version number. |
| [ssl_cert_subject](#ssl_cert_subject-property-pop-struct) | The subject of the certificate used for client authentication. |
| [ssl_cert_encoded](#ssl_cert_encoded-property-pop-struct) | The certificate (PEM/Base64 encoded). |
| [ssl_enabled](#ssl_enabled-property-pop-struct) | This property indicates whether Transport Layer Security/Secure Sockets Layer (TLS/SSL) is enabled. |
| [ssl_provider](#ssl_provider-property-pop-struct) | The Secure Sockets Layer/Transport Layer Security (SSL/TLS) implementation to use. |
| [ssl_server_cert_effective_date](#ssl_server_cert_effective_date-property-pop-struct) | The date on which this certificate becomes valid. |
| [ssl_server_cert_expiration_date](#ssl_server_cert_expiration_date-property-pop-struct) | The date on which the certificate expires. |
| [ssl_server_cert_extended_key_usage](#ssl_server_cert_extended_key_usage-property-pop-struct) | A comma-delimited list of extended key usage identifiers. |
| [ssl_server_cert_fingerprint](#ssl_server_cert_fingerprint-property-pop-struct) | The hex-encoded, 16-byte MD5 fingerprint of the certificate. |
| [ssl_server_cert_fingerprint_sha1](#ssl_server_cert_fingerprint_sha1-property-pop-struct) | The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. |
| [ssl_server_cert_fingerprint_sha256](#ssl_server_cert_fingerprint_sha256-property-pop-struct) | The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. |
| [ssl_server_cert_issuer](#ssl_server_cert_issuer-property-pop-struct) | The issuer of the certificate. |
| [ssl_server_cert_private_key](#ssl_server_cert_private_key-property-pop-struct) | The private key of the certificate (if available). |
| [ssl_server_cert_private_key_available](#ssl_server_cert_private_key_available-property-pop-struct) | Whether a PrivateKey is available for the selected certificate. |
| [ssl_server_cert_private_key_container](#ssl_server_cert_private_key_container-property-pop-struct) | The name of the PrivateKey container for the certificate (if available). |
| [ssl_server_cert_public_key](#ssl_server_cert_public_key-property-pop-struct) | The public key of the certificate. |
| [ssl_server_cert_public_key_algorithm](#ssl_server_cert_public_key_algorithm-property-pop-struct) | The textual description of the certificate's public key algorithm. |
| [ssl_server_cert_public_key_length](#ssl_server_cert_public_key_length-property-pop-struct) | The length of the certificate's public key (in bits). |
| [ssl_server_cert_serial_number](#ssl_server_cert_serial_number-property-pop-struct) | The serial number of the certificate encoded as a string. |
| [ssl_server_cert_signature_algorithm](#ssl_server_cert_signature_algorithm-property-pop-struct) | The text description of the certificate's signature algorithm. |
| [ssl_server_cert_store](#ssl_server_cert_store-property-pop-struct) | The name of the certificate store for the client certificate. |
| [ssl_server_cert_store_password](#ssl_server_cert_store_password-property-pop-struct) | If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store. |
| [ssl_server_cert_store_type](#ssl_server_cert_store_type-property-pop-struct) | The type of certificate store for this certificate. |
| [ssl_server_cert_subject_alt_names](#ssl_server_cert_subject_alt_names-property-pop-struct) | Comma-separated lists of alternative subject names for the certificate. |
| [ssl_server_cert_thumbprint_md5](#ssl_server_cert_thumbprint_md5-property-pop-struct) | The MD5 hash of the certificate. |
| [ssl_server_cert_thumbprint_sha1](#ssl_server_cert_thumbprint_sha1-property-pop-struct) | The SHA-1 hash of the certificate. |
| [ssl_server_cert_thumbprint_sha256](#ssl_server_cert_thumbprint_sha256-property-pop-struct) | The SHA-256 hash of the certificate. |
| [ssl_server_cert_usage](#ssl_server_cert_usage-property-pop-struct) | The text description of UsageFlags . |
| [ssl_server_cert_usage_flags](#ssl_server_cert_usage_flags-property-pop-struct) | The flags that show intended use for the certificate. |
| [ssl_server_cert_version](#ssl_server_cert_version-property-pop-struct) | The certificate's version number. |
| [ssl_server_cert_subject](#ssl_server_cert_subject-property-pop-struct) | The subject of the certificate used for client authentication. |
| [ssl_server_cert_encoded](#ssl_server_cert_encoded-property-pop-struct) | The certificate (PEM/Base64 encoded). |
| [ssl_start_mode](#ssl_start_mode-property-pop-struct) | This property determines how the struct starts the Secure Sockets Layer (SSL) negotiation. |
| [timeout](#timeout-property-pop-struct) | The timeout for the struct. |
| [user](#user-property-pop-struct) | This property includes the user identifier for the mailbox. |

## Method List

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

|  |  |
| --- | --- |
| [config](#config-method-pop-struct) | Sets or retrieves a configuration setting. |
| [connect](#connect-method-pop-struct) | This method connects to the mail server and attempts to log in. |
| [delete](#delete-method-pop-struct) | This method deletes a message specified by MessageNumber on the server. |
| [disconnect](#disconnect-method-pop-struct) | This method disconnects from the mail server. |
| [do_events](#do_events-method-pop-struct) | This method processes events from the internal message queue. |
| [interrupt](#interrupt-method-pop-struct) | This method interrupts the current method. |
| [list_message_sizes](#list_message_sizes-method-pop-struct) | This method retrieves a list of all message sizes from the server. |
| [list_message_ui_ds](#list_message_ui_ds-method-pop-struct) | This method retrieves a list of all message UIDs from the server. |
| [localize_date](#localize_date-method-pop-struct) | This method converts a valid RFC 822 message date to a local date and time. |
| [query_message_size](#query_message_size-method-pop-struct) | This method returns the size in bytes of the current message. |
| [query_message_uid](#query_message_uid-method-pop-struct) | This method returns the unique identifier (UID) of the message as specified by the server. |
| [query_total_size](#query_total_size-method-pop-struct) | This method returns the cumulative size in bytes of messages in the mailbox (including headers). |
| [reset](#reset-method-pop-struct) | This method will reset the struct. |
| [reset_state](#reset_state-method-pop-struct) | Resets all changes and reverts back to the state the struct was in when the user first connected. |
| [retrieve](#retrieve-method-pop-struct) | This method retrieves a message specified by MessageNumber from the server. |
| [retrieve_headers](#retrieve_headers-method-pop-struct) | This method retrieves headers for a message specified by MessageNumber . |
| [send_command](#send_command-method-pop-struct) | This method sends the exact command directly 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_connection_status](#on_connection_status-event-pop-struct) | Fired to indicate changes in the connection state. |
| [on_end_transfer](#on_end_transfer-event-pop-struct) | This event is fired when the message completes transferring. |
| [on_error](#on_error-event-pop-struct) | Fired when information is available about errors during data delivery. |
| [on_header](#on_header-event-pop-struct) | This event is fired for every message header being retrieved. |
| [on_launch_browser](#on_launch_browser-event-pop-struct) | Fires before launching a browser with the authorization URL. |
| [on_log](#on_log-event-pop-struct) | Fired once for each log message. |
| [on_message_list](#on_message_list-event-pop-struct) | This event is fired for every message listed by ListMessageSizes and/or ListMessageUIDs . |
| [on_pi_trail](#on_pi_trail-event-pop-struct) | This event traces the commands sent to the mail server, and the respective replies. |
| [on_ssl_server_authentication](#on_ssl_server_authentication-event-pop-struct) | Fired after the server presents its certificate to the client. |
| [on_ssl_status](#on_ssl_status-event-pop-struct) | Fired when secure connection progress messages are available. |
| [on_start_transfer](#on_start_transfer-event-pop-struct) | This event is fired when the message starts transferring. |
| [on_transfer](#on_transfer-event-pop-struct) | This event is fired when the message is transferred from MailServer . |

## Config Settings

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

|  |  |
| --- | --- |
| [AuthorizationIdentity](#AuthorizationIdentity) | The value to use as the authorization identity when SASL authentication is used. |
| [AutoDecodeSubject](#AutoDecodeSubject) | Instructs the struct to automatically decode message subjects. |
| [GetMessageSize](#GetMessageSize) | Whether to poll the server for the message size prior to retrieving it. |
| [MaxLineLength](#MaxLineLength) | The maximum expected length for message lines. |
| [ConnectionTimeout](#ConnectionTimeout) | Sets a separate timeout value for establishing a connection. |
| [EnableFallback](#EnableFallback) | Whether to try the other addresses the remote host resolves to when a connection attempt fails. |
| [FallbackTimeout](#FallbackTimeout) | The maximum time in milliseconds to spend on connection attempts when EnableFallback is enabled. |
| [FirewallAutoDetect](#FirewallAutoDetect) | Tells the struct whether or not to automatically detect and use firewall system settings, if available. |
| [FirewallHost](#FirewallHost) | Name or IP address of firewall (optional). |
| [FirewallHTTPVersion](#FirewallHTTPVersion) | The HTTP version to be used when connecting through a tunneling proxy. |
| [FirewallPassword](#FirewallPassword) | Password to be used if authentication is to be used when connecting through the firewall. |
| [FirewallPort](#FirewallPort) | The TCP port for the FirewallHost;. |
| [FirewallType](#FirewallType) | Determines the type of firewall to connect through. |
| [FirewallUser](#FirewallUser) | A user name if authentication is to be used connecting through a firewall. |
| [KeepAliveInterval](#KeepAliveInterval) | The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received. |
| [KeepAliveTime](#KeepAliveTime) | The inactivity time in milliseconds before a TCP keep-alive packet is sent. |
| [Linger](#Linger) | When set to True, connections are terminated gracefully. |
| [LingerTime](#LingerTime) | Time in seconds to have the connection linger. |
| [LocalHost](#LocalHost) | The name of the local host through which connections are initiated or accepted. |
| [LocalPort](#LocalPort) | The port in the local host where the struct binds. |
| [MaxLineLength](#MaxLineLength) | The maximum amount of data to accumulate when no EOL is found. |
| [MaxTransferRate](#MaxTransferRate) | The transfer rate limit in bytes per second. |
| [ProxyExceptionsList](#ProxyExceptionsList) | A semicolon separated list of hosts and IPs to bypass when using a proxy. |
| [TCPKeepAlive](#TCPKeepAlive) | Determines whether or not the keep alive socket option is enabled. |
| [TcpNoDelay](#TcpNoDelay) | Whether or not to delay when sending packets. |
| [UseIPv6](#UseIPv6) | Whether to use IPv6. |
| [UseNTLMv2](#UseNTLMv2) | Whether to use NTLM V2. |
| [LogSSLPackets](#LogSSLPackets) | Controls whether SSL packets are logged when using the internal security API. |
| [OpenSSLCADir](#OpenSSLCADir) | The path to a directory containing CA certificates. |
| [OpenSSLCAFile](#OpenSSLCAFile) | Name of the file containing the list of CA's trusted by your application. |
| [OpenSSLCipherList](#OpenSSLCipherList) | A string that controls the ciphers to be used by SSL. |
| [OpenSSLPrngSeedData](#OpenSSLPrngSeedData) | The data to seed the pseudo random number generator (PRNG). |
| [ReuseSSLSession](#ReuseSSLSession) | Determines if the SSL session is reused. |
| [SSLCACerts](#SSLCACerts) | A newline separated list of CA certificates to be included when performing an SSL handshake. |
| [SSLCheckCRL](#SSLCheckCRL) | Whether to check the Certificate Revocation List for the server certificate. |
| [SSLCheckOCSP](#SSLCheckOCSP) | Whether to use OCSP to check the status of the server certificate. |
| [SSLCipherStrength](#SSLCipherStrength) | The minimum cipher strength used for bulk encryption. |
| [SSLClientCACerts](#SSLClientCACerts) | A newline separated list of CA certificates to use during SSL client certificate validation. |
| [SSLEnabledCipherSuites](#SSLEnabledCipherSuites) | The cipher suite to be used in an SSL negotiation. |
| [SSLEnabledProtocols](#SSLEnabledProtocols) | Used to enable/disable the supported security protocols. |
| [SSLEnableRenegotiation](#SSLEnableRenegotiation) | Whether the renegotiation_info SSL extension is supported. |
| [SSLIncludeCertChain](#SSLIncludeCertChain) | Whether the entire certificate chain is included in the SSLServerAuthentication event. |
| [SSLKeyLogFile](#SSLKeyLogFile) | The location of a file where per-session secrets are written for debugging purposes. |
| [SSLNegotiatedCipher](#SSLNegotiatedCipher) | Returns the negotiated cipher suite. |
| [SSLNegotiatedCipherStrength](#SSLNegotiatedCipherStrength) | Returns the negotiated cipher suite strength. |
| [SSLNegotiatedCipherSuite](#SSLNegotiatedCipherSuite) | Returns the negotiated cipher suite. |
| [SSLNegotiatedKeyExchange](#SSLNegotiatedKeyExchange) | Returns the negotiated key exchange algorithm. |
| [SSLNegotiatedKeyExchangeStrength](#SSLNegotiatedKeyExchangeStrength) | Returns the negotiated key exchange algorithm strength. |
| [SSLNegotiatedVersion](#SSLNegotiatedVersion) | Returns the negotiated protocol version. |
| [SSLSecurityFlags](#SSLSecurityFlags) | Flags that control certificate verification. |
| [SSLServerCACerts](#SSLServerCACerts) | A newline separated list of CA certificates to use during SSL server certificate validation. |
| [TLS12SignatureAlgorithms](#TLS12SignatureAlgorithms) | Defines the allowed TLS 1.2 signature algorithms when SSLProvider is set to Internal. |
| [TLS12SupportedGroups](#TLS12SupportedGroups) | The supported groups for ECC. |
| [TLS13KeyShareGroups](#TLS13KeyShareGroups) | The groups for which to pregenerate key shares. |
| [TLS13SignatureAlgorithms](#TLS13SignatureAlgorithms) | The allowed certificate signature algorithms. |
| [TLS13SupportedGroups](#TLS13SupportedGroups) | The supported groups for (EC)DHE key exchange. |
| [AbsoluteTimeout](#AbsoluteTimeout) | Determines whether timeouts are inactivity timeouts or absolute timeouts. |
| [FirewallData](#FirewallData) | Used to send extra data to the firewall. |
| [InBufferSize](#InBufferSize) | The size in bytes of the incoming queue of the socket. |
| [OutBufferSize](#OutBufferSize) | The size in bytes of the outgoing queue of the socket. |
| [BuildInfo](#BuildInfo) | Information about the product's build. |
| [CodePage](#CodePage) | The system code page used for Unicode to Multibyte translations. |
| [LicenseInfo](#LicenseInfo) | Information about the current license. |
| [MaskSensitiveData](#MaskSensitiveData) | Whether sensitive data is masked in log messages. |
| [UseInternalSecurityAPI](#UseInternalSecurityAPI) | Whether or not to use the system security libraries or an internal implementation. |

# auth_mechanism property ([POP](#struct-ipworksedipop) Struct)

This property includes the authentication mechanism to be used when connecting to the mail server.

## Syntax

*Rust Syntax*

```text
fn auth_mechanism(&self ) -> Result<i32, IPWorksEDIError> fn set_auth_mechanism(&self, value : i32) ->  Option<IPWorksEDIError>
```

## Possible Values

```text
0   // UserPassword1   // CRAMMD52   // NTLM3   // APOP4   // SASLPlain5   // SASLDigestMD56   // Kerberos7   // XOAUTH2
```

## Default Value

0

## Remarks

This property is used as the authentication mechanism when connecting to the mail server. By default, this property is amUserPassword (0), and default plaintext authentication is used to log in to the server. Other, more secure, options include amCRAMMD5 (1) for CRAM-MD5, amNTLM (2) for NTLM authentication, amAPOP (3) for APOP authentication, and amSASLDigestMD5 (5) for SASL DIGEST-MD5 authentication.

amSASLPlain (4) is also available, but most servers require a Secure Sockets Layer (SSL) connection when utilizing this authentication mechanism.

amKerberos (6) is for Kerberos authentication. NOTE: This functionality is available only in Windows.

## Data Type

i32

# connected property ([POP](#struct-ipworksedipop) Struct)

Whether the struct is connected.

## Syntax

*Rust Syntax*

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

## Default Value

false

## Remarks

This property is used to determine whether or not the struct is connected to the remote host. Use the [connect](#connect-method-pop-struct) and [disconnect](#disconnect-method-pop-struct) methods to manage the connection.

This property is read-only.

## Data Type

bool

# firewall_auto_detect property ([POP](#struct-ipworksedipop) Struct)

Whether to automatically detect and use firewall system settings, if available.

## Syntax

*Rust Syntax*

```text
fn firewall_auto_detect(&self ) -> Result<bool, IPWorksEDIError> fn set_firewall_auto_detect(&self, value : bool) ->  Option<IPWorksEDIError>
```

## Default Value

false

## Remarks

Whether to automatically detect and use firewall system settings, if available.

## Data Type

bool

# firewall_type property ([POP](#struct-ipworksedipop) Struct)

The type of firewall to connect through.

## Syntax

*Rust Syntax*

```text
fn firewall_type(&self ) -> Result<i32, IPWorksEDIError> fn set_firewall_type(&self, value : i32) ->  Option<IPWorksEDIError>
```

## Possible Values

```text
0   // None1   // Tunnel2   // SOCKS43   // SOCKS510   // SOCKS4A
```

## Default Value

0

## Remarks

The type of firewall to connect through. The applicable values are as follows:

|  |  |
| --- | --- |
| fwNone (0) | No firewall (default setting). |
| fwTunnel (1) | Connect through a tunneling proxy. [firewall_port](#firewall_port-property-pop-struct) is set to 80. |
| fwSOCKS4 (2) | Connect through a SOCKS4 Proxy. [firewall_port](#firewall_port-property-pop-struct) is set to 1080. |
| fwSOCKS5 (3) | Connect through a SOCKS5 Proxy. [firewall_port](#firewall_port-property-pop-struct) is set to 1080. |
| fwSOCKS4A (10) | Connect through a SOCKS4A Proxy. [firewall_port](#firewall_port-property-pop-struct) is set to 1080. |

## Data Type

i32

# firewall_host property ([POP](#struct-ipworksedipop) Struct)

The name or IP address of the firewall (optional).

## Syntax

*Rust Syntax*

```text
fn firewall_host(&self ) -> Result<String, IPWorksEDIError> fn set_firewall_host(&self, value : &str) ->  Option<IPWorksEDIError>
fn set_firewall_host_ref(&self, value : &String) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

The name or IP address of the firewall (optional). If a [firewall_host](#firewall_host-property-pop-struct) is given, the requested connections will be authenticated through the specified firewall when connecting.

If this property is set to a Domain Name, a DNS request is initiated. Upon successful termination of the request, this property is set to the corresponding address. If the search is not successful, the struct fails with an error.

## Data Type

String

# firewall_password property ([POP](#struct-ipworksedipop) Struct)

A password if authentication is to be used when connecting through the firewall.

## Syntax

*Rust Syntax*

```text
fn firewall_password(&self ) -> Result<String, IPWorksEDIError> fn set_firewall_password(&self, value : &str) ->  Option<IPWorksEDIError>
fn set_firewall_password_ref(&self, value : &String) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

A password if authentication is to be used when connecting through the firewall. If [firewall_host](#firewall_host-property-pop-struct) is specified, the [firewall_user](#firewall_user-property-pop-struct) and [firewall_password](#firewall_password-property-pop-struct) properties are used to connect and authenticate to the given firewall. If the authentication fails, the struct fails with an error.

## Data Type

String

# firewall_port property ([POP](#struct-ipworksedipop) Struct)

The Transmission Control Protocol (TCP) port for the firewall Host .

## Syntax

*Rust Syntax*

```text
fn firewall_port(&self ) -> Result<i32, IPWorksEDIError> fn set_firewall_port(&self, value : i32) ->  Option<IPWorksEDIError>
```

## Default Value

0

## Remarks

The Transmission Control Protocol (TCP) port for the firewall [firewall_host](#firewall_host-property-pop-struct). See the description of the [firewall_host](#firewall_host-property-pop-struct) property for details.

NOTE: This property is set automatically when [firewall_firewall_type](#POP_p_FirewallFirewallType) is set to a valid value. See the description of the [firewall_firewall_type](#POP_p_FirewallFirewallType) property for details.

## Data Type

i32

# firewall_user property ([POP](#struct-ipworksedipop) Struct)

A username if authentication is to be used when connecting through a firewall.

## Syntax

*Rust Syntax*

```text
fn firewall_user(&self ) -> Result<String, IPWorksEDIError> fn set_firewall_user(&self, value : &str) ->  Option<IPWorksEDIError>
fn set_firewall_user_ref(&self, value : &String) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

A username if authentication is to be used when connecting through a firewall. If [firewall_host](#firewall_host-property-pop-struct) is specified, this property and the [firewall_password](#firewall_password-property-pop-struct) property are used to connect and authenticate to the given [Firewall](#Type_Firewall). If the authentication fails, the struct fails with an error.

## Data Type

String

# idle property ([POP](#struct-ipworksedipop) Struct)

The current status of the struct.

## Syntax

*Rust Syntax*

```text
fn idle(&self ) -> Result<bool, IPWorksEDIError>
```

## Default Value

true

## Remarks

This property will be False if the component is currently busy (communicating or waiting for an answer), and True at all other times.

This property is read-only.

## Data Type

bool

# include_headers property ([POP](#struct-ipworksedipop) Struct)

This property instructs the struct to include the headers in the MessageText and LocalFile.

## Syntax

*Rust Syntax*

```text
fn include_headers(&self ) -> Result<bool, IPWorksEDIError> fn set_include_headers(&self, value : bool) ->  Option<IPWorksEDIError>
```

## Default Value

false

## Remarks

This property instructs the component to include the headers in the MessageText and LocalFile. If set to True, the headers for the message being retrieved will be placed before the message body in the [message_text](#message_text-property-pop-struct) property;. If [local_file](#local_file-property-pop-struct) is set, then the headers will be written to that file before the message body. In this manner, the whole content of a MIME-encoded message can be passed to the MIME struct for further message processing.

## Data Type

bool

# last_reply property ([POP](#struct-ipworksedipop) Struct)

This property indicates the last reply received from the server.

## Syntax

*Rust Syntax*

```text
fn last_reply(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

This property indicates the last reply received from the server. It can be used for informational purposes. The same information and more also can be retrieved through the [on_pi_trail](#on_pi_trail-event-pop-struct) event.

This property is read-only.

## Data Type

String

# local_file property ([POP](#struct-ipworksedipop) Struct)

This property includes the path to a local file to download the message body. If the file exists, it is overwritten (optional).

## Syntax

*Rust Syntax*

```text
fn local_file(&self ) -> Result<String, IPWorksEDIError> fn set_local_file(&self, value : &str) ->  Option<IPWorksEDIError>
fn set_local_file_ref(&self, value : &String) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

This property is used when retrieving a message. If this property is empty, then the received data are provided through the parameters of the [on_transfer](#on_transfer-event-pop-struct) event. Note: If you are not retrieving the entire message ([max_lines](#max_lines-property-pop-struct) is nonzero), no data will be written to local_file.

## Data Type

String

# local_host property ([POP](#struct-ipworksedipop) Struct)

The name of the local host or user-assigned IP interface through which connections are initiated or accepted.

## Syntax

*Rust Syntax*

```text
fn local_host(&self ) -> Result<String, IPWorksEDIError> fn set_local_host(&self, value : &str) ->  Option<IPWorksEDIError>
fn set_local_host_ref(&self, value : &String) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

This property contains the name of the local host as obtained by the *gethostname()* system call, or if the user has assigned an IP address, the value of that address.

In multihomed hosts (machines with more than one IP interface) setting LocalHost to the IP address of an interface will make the struct initiate connections (or accept in the case of server structs) only through that interface. It is recommended to provide an IP address rather than a hostname when setting this property to ensure the desired interface is used.

If the struct is connected, the local_host property shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multihomed hosts (machines with more than one IP interface).

NOTE: local_host is not persistent. You must always set it in code, and never in the property window.

## Data Type

String

# mail_port property ([POP](#struct-ipworksedipop) Struct)

This property includes the server port for POP (default 110).

## Syntax

*Rust Syntax*

```text
fn mail_port(&self ) -> Result<i32, IPWorksEDIError> fn set_mail_port(&self, value : i32) ->  Option<IPWorksEDIError>
```

## Default Value

110

## Remarks

This property contains the server port for POP (default 110). A valid port number (a value between 1 and 65535) is required for the connection to take place. The property must be set before a connection is attempted and cannot be changed once a connection is established. Any attempt to change this property while connected will fail with an error.

For implicit Secure Sockets Layer (SSL), use port 995 (please refer to the [ssl_start_mode](#ssl_start_mode-property-pop-struct) property for more information).

## Data Type

i32

# mail_server property ([POP](#struct-ipworksedipop) Struct)

This property includes the name or address of a mail server (internet post office server).

## Syntax

*Rust Syntax*

```text
fn mail_server(&self ) -> Result<String, IPWorksEDIError> fn set_mail_server(&self, value : &str) ->  Option<IPWorksEDIError>
fn set_mail_server_ref(&self, value : &String) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

This property specifies the IP address (IP number in dotted internet format) or the domain name of the mail server. It is set before a connection is attempted and cannot be changed once a connection is in progress.

If this property is set to a domain name, a DNS request is initiated. Upon successful termination of the request, this property is set to the corresponding address. If the search is not successful, the struct fails with an error.

If the struct is configured to use a *SOCKS* firewall, the value assigned to this property may be preceded with an "*". If this is the case, the host name is passed to the firewall unresolved and the firewall performs the DNS resolution.

## Data Type

String

# max_lines property ([POP](#struct-ipworksedipop) Struct)

This property includes the maximum number of message lines other than headers to retrieve.

## Syntax

*Rust Syntax*

```text
fn max_lines(&self ) -> Result<i32, IPWorksEDIError> fn set_max_lines(&self, value : i32) ->  Option<IPWorksEDIError>
```

## Default Value

0

## Remarks

This property is used to limit the number of text lines other than headers retrieved for messages. It can be used to preview message headers and a portion of their contents, without incurring the overhead of downloading the entire message.

The default value of the property is 0. In this case, the entire message will be retrieved, without interruptions. Note: If you are not retrieving the entire message (max_lines is nonzero), no data will be written to [local_file](#local_file-property-pop-struct).

## Data Type

i32

# message property ([POP](#struct-ipworksedipop) Struct)

This property provides the raw message content.

## Syntax

*Rust Syntax*

```text
fn message(&self ) -> Result<Vec<u8>, IPWorksEDIError>
```

## Default Value

""

## Remarks

This property is populated after calling [retrieve](#retrieve-method-pop-struct) and holds the raw message content. This can be used to access the data before any processing is done by the struct.

This property is read-only.

## Data Type

Vec

# message_cc property ([POP](#struct-ipworksedipop) Struct)

This property includes the value of the CC header of the last retrieved message.

## Syntax

*Rust Syntax*

```text
fn message_cc(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

This property contains the value of the CC header of the last retrieved message. The same information also may be retrieved through the [on_header](#on_header-event-pop-struct) event.

This property is read-only.

## Data Type

String

# message_count property ([POP](#struct-ipworksedipop) Struct)

This property includes the number of messages in the mailbox.

## Syntax

*Rust Syntax*

```text
fn message_count(&self ) -> Result<i32, IPWorksEDIError>
```

## Default Value

0

## Remarks

This property contains the number of messages in the mailbox. When the struct is not connected to the server, the value of this property is 0. When connected, it contains the number of messages in the mailbox as reported by the POP server.

This property is read-only.

## Data Type

i32

# message_date property ([POP](#struct-ipworksedipop) Struct)

This property includes the value of the date header of the last retrieved message.

## Syntax

*Rust Syntax*

```text
fn message_date(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

This property contains the value of the date header of the last retrieved message. The same information also may be retrieved through the [on_header](#on_header-event-pop-struct) event.

This property is read-only.

## Data Type

String

# message_from property ([POP](#struct-ipworksedipop) Struct)

This property includes the value of the from header of the last retrieved message.

## Syntax

*Rust Syntax*

```text
fn message_from(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

This property contains the value of the from header of the last retrieved message. The same information also may be retrieved through the [on_header](#on_header-event-pop-struct) event.

This property is read-only.

## Data Type

String

# message_header_count property ([POP](#struct-ipworksedipop) Struct)

The number of records in the MessageHeader arrays.

## Syntax

*Rust Syntax*

```text
fn message_header_count(&self ) -> Result<i32, IPWorksEDIError>
```

## Default Value

0

## Remarks

This property controls the size of the following arrays:

- [message_header_field](#message_header_field-property-pop-struct)
- [message_header_value](#message_header_value-property-pop-struct)

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

This property is read-only.

## Data Type

i32

# message_header_field property ([POP](#struct-ipworksedipop) Struct)

This property contains the name of the HTTP header (this is the same case as it is delivered).

## Syntax

*Rust Syntax*

```text
fn message_header_field(&self , MessageHeaderIndex : i32) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

This property contains the name of the HTTP [Header](#Type_Header) (this is the same case as it is delivered).

The *MessageHeaderIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [MessageHeaderCount](#message_header_count-property-pop-struct) property.

This property is read-only.

## Data Type

String

# message_header_value property ([POP](#struct-ipworksedipop) Struct)

This property contains the header contents.

## Syntax

*Rust Syntax*

```text
fn message_header_value(&self , MessageHeaderIndex : i32) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

This property contains the [Header](#Type_Header) contents.

The *MessageHeaderIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [MessageHeaderCount](#message_header_count-property-pop-struct) property.

This property is read-only.

## Data Type

String

# message_headers_string property ([POP](#struct-ipworksedipop) Struct)

This property includes a string representation of the full headers of the message as retrieved from the server.

## Syntax

*Rust Syntax*

```text
fn message_headers_string(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

This property contains a string representation of the full headers of the message as retrieved from the server. If the struct is not connected, or [message_number](#message_number-property-pop-struct) does not contain a valid message number, the value of this property is an empty string. Otherwise, it contains the full headers of the mail message as reported by the server.

The [mail_server](#mail_server-property-pop-struct) is asked about the headers of the message only if the [message_number](#message_number-property-pop-struct) property has changed. If [message_number](#message_number-property-pop-struct) has not changed, the struct returns a cached value.

**Example. Connect and Retrieve Messages:**

```text
POPControl.MailServer = "MyPOPServer"
POPControl.User = "username"
POPControl.Password = "password"
POPControl.Connect()

POPControl.MessageNumber = 1
MessageText = POPControl.MessageText
MessageHeadersString = POPControl.MessageHeadersString
```

This property is read-only.

## Data Type

String

# message_number property ([POP](#struct-ipworksedipop) Struct)

This property includes the current (selected) message.

## Syntax

*Rust Syntax*

```text
fn message_number(&self ) -> Result<i32, IPWorksEDIError> fn set_message_number(&self, value : i32) ->  Option<IPWorksEDIError>
```

## Default Value

1

## Remarks

This property indicates the current (selected) message. This property specifies a message number in between 1 and [message_count](#message_count-property-pop-struct). The various struct methods related to single messages use this property as a message pointer (see method descriptions and the [query_message_size](#query_message_size-method-pop-struct) method).

## Data Type

i32

# message_recipient_count property ([POP](#struct-ipworksedipop) Struct)

The number of records in the MessageRecipient arrays.

## Syntax

*Rust Syntax*

```text
fn message_recipient_count(&self ) -> Result<i32, IPWorksEDIError>
```

## Default Value

0

## Remarks

This property controls the size of the following arrays:

- [message_recipient_address](#message_recipient_address-property-pop-struct)
- [message_recipient_name](#message_recipient_name-property-pop-struct)
- [message_recipient_options](#message_recipient_options-property-pop-struct)
- [message_recipient_type](#message_recipient_type-property-pop-struct)

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

This property is read-only.

## Data Type

i32

# message_recipient_address property ([POP](#struct-ipworksedipop) Struct)

This property contains the email address of the recipient.

## Syntax

*Rust Syntax*

```text
fn message_recipient_address(&self , RecipientIndex : i32) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

This property contains the email address of the recipient.

The *RecipientIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [MessageRecipientCount](#message_recipient_count-property-pop-struct) property.

This property is read-only.

## Data Type

String

# message_recipient_name property ([POP](#struct-ipworksedipop) Struct)

This property contains the name of the recipient.

## Syntax

*Rust Syntax*

```text
fn message_recipient_name(&self , RecipientIndex : i32) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

This property contains the name of the recipient.

The *RecipientIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [MessageRecipientCount](#message_recipient_count-property-pop-struct) property.

This property is read-only.

## Data Type

String

# message_recipient_options property ([POP](#struct-ipworksedipop) Struct)

This property contains the recipient sending options (used only by SMTP).

## Syntax

*Rust Syntax*

```text
fn message_recipient_options(&self , RecipientIndex : i32) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

This property contains the recipient sending options (used only by SMTP). This must be a string of RFC-compliant recipient options (used by [SMTP](#SMTP)).

One type of option is a delivery status notification sent per recipient, which is specified by RFC 1891.

```text
component.MessageRecipientOptions(0) = "NOTIFY SUCCESS,FAILURE,DELAY";
```

The *RecipientIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [MessageRecipientCount](#message_recipient_count-property-pop-struct) property.

This property is read-only.

## Data Type

String

# message_recipient_type property ([POP](#struct-ipworksedipop) Struct)

This property contains the recipient type: To, Cc, or Bcc.

## Syntax

*Rust Syntax*

```text
fn message_recipient_type(&self , RecipientIndex : i32) -> Result<i32, IPWorksEDIError>
```

## Possible Values

```text
0   // To1   // Cc2   // BCc
```

## Default Value

0

## Remarks

This property contains the recipient type: To, Cc, or Bcc.

The *RecipientIndex* parameter specifies the index of the item in the array. The size of the array is controlled by the [MessageRecipientCount](#message_recipient_count-property-pop-struct) property.

This property is read-only.

## Data Type

i32

# message_reply_to property ([POP](#struct-ipworksedipop) Struct)

This property includes the value of the Reply-To header of the last retrieved message.

## Syntax

*Rust Syntax*

```text
fn message_reply_to(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

This property contains the value of the Reply-To header of the last retrieved message. The same information also may be retrieved through the [on_header](#on_header-event-pop-struct) event.

This property is read-only.

## Data Type

String

# message_subject property ([POP](#struct-ipworksedipop) Struct)

This property includes the value of the Subject header of the last retrieved message.

## Syntax

*Rust Syntax*

```text
fn message_subject(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

This property contains the value of the Subject header of the last retrieved message. The same information also may be retrieved through the [on_header](#on_header-event-pop-struct) event.

This property is read-only.

## Data Type

String

# message_text property ([POP](#struct-ipworksedipop) Struct)

This property includes the full text of the message as retrieved from the server.

## Syntax

*Rust Syntax*

```text
fn message_text(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

This property contains the full text of the message as retrieved from the server. If the struct is not connected, or [message_number](#message_number-property-pop-struct) does not contain a valid message number, the value of this property is an empty string. Otherwise, it contains the text of the mail message as reported by the server (a maximum of [max_lines](#max_lines-property-pop-struct)).

The [mail_server](#mail_server-property-pop-struct) is asked about the text of the message only if the [message_number](#message_number-property-pop-struct) property has changed. If [message_number](#message_number-property-pop-struct) has not changed, the struct returns a cached value.

**Example. Connect and Retrieve Messages:**

```text
POPControl.MailServer = "MyPOPServer"
POPControl.User = "username"
POPControl.Password = "password"
POPControl.Connect()

POPControl.MessageNumber = 1
MessageText = POPControl.MessageText
MessageHeaders = POPControl.MessageHeaders
```

This property is read-only.

## Data Type

String

# message_to property ([POP](#struct-ipworksedipop) Struct)

This property includes the value of the To header of the last retrieved message.

## Syntax

*Rust Syntax*

```text
fn message_to(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

This property contains the value of the To header of the last retrieved message. The same information also may be retrieved through the [on_header](#on_header-event-pop-struct) event.

This property is read-only.

## Data Type

String

# o_auth_access_token property ([POP](#struct-ipworksedipop) Struct)

The access token returned by the authorization server.

## Syntax

*Rust Syntax*

```text
fn o_auth_access_token(&self ) -> Result<String, IPWorksEDIError> fn set_o_auth_access_token(&self, value : &str) ->  Option<IPWorksEDIError>
fn set_o_auth_access_token_ref(&self, value : &String) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

The access token returned by the authorization server. This is set when the struct makes a request to the token server.

## Data Type

String

# o_auth_authorization_scope property ([POP](#struct-ipworksedipop) Struct)

The scope request or response parameter used during authorization.

## Syntax

*Rust Syntax*

```text
fn o_auth_authorization_scope(&self ) -> Result<String, IPWorksEDIError> fn set_o_auth_authorization_scope(&self, value : &str) ->  Option<IPWorksEDIError>
fn set_o_auth_authorization_scope_ref(&self, value : &String) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

The scope request or response parameter used during authorization.

## Data Type

String

# o_auth_client_id property ([POP](#struct-ipworksedipop) Struct)

The id of the client assigned when registering the application.

## Syntax

*Rust Syntax*

```text
fn o_auth_client_id(&self ) -> Result<String, IPWorksEDIError> fn set_o_auth_client_id(&self, value : &str) ->  Option<IPWorksEDIError>
fn set_o_auth_client_id_ref(&self, value : &String) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

The id of the client assigned when registering the application.

## Data Type

String

# o_auth_client_secret property ([POP](#struct-ipworksedipop) Struct)

The secret value for the client assigned when registering the application.

## Syntax

*Rust Syntax*

```text
fn o_auth_client_secret(&self ) -> Result<String, IPWorksEDIError> fn set_o_auth_client_secret(&self, value : &str) ->  Option<IPWorksEDIError>
fn set_o_auth_client_secret_ref(&self, value : &String) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

The secret value for the client assigned when registering the application.

## Data Type

String

# o_auth_refresh_token property ([POP](#struct-ipworksedipop) Struct)

Specifies the refresh token received from or sent to the authorization server.

## Syntax

*Rust Syntax*

```text
fn o_auth_refresh_token(&self ) -> Result<String, IPWorksEDIError> fn set_o_auth_refresh_token(&self, value : &str) ->  Option<IPWorksEDIError>
fn set_o_auth_refresh_token_ref(&self, value : &String) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

Specifies the refresh token received from or sent to the authorization server. This property is set automatically if a refresh token is retrieved from the token server. If the OAuthAutomaticRefresh configuration setting is set to true, and the o_auth_grant_type property is set to a grant that can use refresh tokens.

## Data Type

String

# o_auth_return_url property ([POP](#struct-ipworksedipop) Struct)

The URL where the user (browser) returns after authenticating.

## Syntax

*Rust Syntax*

```text
fn o_auth_return_url(&self ) -> Result<String, IPWorksEDIError> fn set_o_auth_return_url(&self, value : &str) ->  Option<IPWorksEDIError>
fn set_o_auth_return_url_ref(&self, value : &String) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

The URL where the user (browser) returns after authenticating. This property is mapped to the *redirect_uri* parameter when making a request to the authorization server. Typically, this is automatically set by the struct when using the embedded web server. If the OAuthWebServerPort or OAuthWebServerHost configuration settings is set, then this property should be set to match. If using the Web client profile, this should be set to the place where the authorization code will be parsed out of the response after the user finishes authorizing.

## Data Type

String

# o_auth_server_auth_url property ([POP](#struct-ipworksedipop) Struct)

The URL of the authorization server.

## Syntax

*Rust Syntax*

```text
fn o_auth_server_auth_url(&self ) -> Result<String, IPWorksEDIError> fn set_o_auth_server_auth_url(&self, value : &str) ->  Option<IPWorksEDIError>
fn set_o_auth_server_auth_url_ref(&self, value : &String) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

The URL of the authorization server.

## Data Type

String

# o_auth_server_token_url property ([POP](#struct-ipworksedipop) Struct)

The URL of the token server used to obtain the access token.

## Syntax

*Rust Syntax*

```text
fn o_auth_server_token_url(&self ) -> Result<String, IPWorksEDIError> fn set_o_auth_server_token_url(&self, value : &str) ->  Option<IPWorksEDIError>
fn set_o_auth_server_token_url_ref(&self, value : &String) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

The URL of the token server used to obtain the access token.

## Data Type

String

# password property ([POP](#struct-ipworksedipop) Struct)

This property includes the password for the mailbox user.

## Syntax

*Rust Syntax*

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

## Default Value

""

## Remarks

This property contains the password for the mailbox user. This property must be set before the struct connects to the [mail_server](#mail_server-property-pop-struct).

## Data Type

String

# ssl_accept_server_cert_effective_date property ([POP](#struct-ipworksedipop) Struct)

The date on which this certificate becomes valid.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_effective_date(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The date on which this certificate becomes valid. Before this date, it is not valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2000 15:00:00.

This property is read-only.

## Data Type

String

# ssl_accept_server_cert_expiration_date property ([POP](#struct-ipworksedipop) Struct)

The date on which the certificate expires.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_expiration_date(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The date on which the certificate expires. After this date, the certificate will no longer be valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2001 15:00:00.

This property is read-only.

## Data Type

String

# ssl_accept_server_cert_extended_key_usage property ([POP](#struct-ipworksedipop) Struct)

A comma-delimited list of extended key usage identifiers.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_extended_key_usage(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

A comma-delimited list of extended key usage identifiers. These are the same as ASN.1 object identifiers (OIDs).

This property is read-only.

## Data Type

String

# ssl_accept_server_cert_fingerprint property ([POP](#struct-ipworksedipop) Struct)

The hex-encoded, 16-byte MD5 fingerprint of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_fingerprint(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The hex-encoded, 16-byte MD5 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: *bc:2a:72:af:fe:58:17:43:7a:5f:ba:5a:7c:90:f7:02*

This property is read-only.

## Data Type

String

# ssl_accept_server_cert_fingerprint_sha1 property ([POP](#struct-ipworksedipop) Struct)

The hex-encoded, 20-byte SHA-1 fingerprint of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_fingerprint_sha1(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: *30:7b:fa:38:65:83:ff:da:b4:4e:07:3f:17:b8:a4:ed:80:be:ff:84*

This property is read-only.

## Data Type

String

# ssl_accept_server_cert_fingerprint_sha256 property ([POP](#struct-ipworksedipop) Struct)

The hex-encoded, 32-byte SHA-256 fingerprint of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_fingerprint_sha256(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: *6a:80:5c:33:a9:43:ea:b0:96:12:8a:64:96:30:ef:4a:8a:96:86:ce:f4:c7:be:10:24:8e:2b:60:9e:f3:59:53*

This property is read-only.

## Data Type

String

# ssl_accept_server_cert_issuer property ([POP](#struct-ipworksedipop) Struct)

The issuer of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_issuer(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The issuer of the certificate. This property contains a string representation of the name of the issuing authority for the certificate.

This property is read-only.

## Data Type

String

# ssl_accept_server_cert_private_key property ([POP](#struct-ipworksedipop) Struct)

The private key of the certificate (if available).

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_private_key(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The private key of the certificate (if available). The key is provided as PEM/Base64-encoded data.

NOTE: The [ssl_accept_server_cert_private_key](#ssl_accept_server_cert_private_key-property-pop-struct) may be available but not exportable. In this case, [ssl_accept_server_cert_private_key](#ssl_accept_server_cert_private_key-property-pop-struct) returns an empty string.

This property is read-only.

## Data Type

String

# ssl_accept_server_cert_private_key_available property ([POP](#struct-ipworksedipop) Struct)

Whether a PrivateKey is available for the selected certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_private_key_available(&self ) -> Result<bool, IPWorksEDIError>
```

## Default Value

false

## Remarks

Whether a [ssl_accept_server_cert_private_key](#ssl_accept_server_cert_private_key-property-pop-struct) is available for the selected certificate. If [ssl_accept_server_cert_private_key_available](#ssl_accept_server_cert_private_key_available-property-pop-struct) is True, the certificate may be used for authentication purposes (e.g., server authentication).

This property is read-only.

## Data Type

bool

# ssl_accept_server_cert_private_key_container property ([POP](#struct-ipworksedipop) Struct)

The name of the PrivateKey container for the certificate (if available).

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_private_key_container(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The name of the [ssl_accept_server_cert_private_key](#ssl_accept_server_cert_private_key-property-pop-struct) container for the certificate (if available). This functionality is available only on Windows platforms.

This property is read-only.

## Data Type

String

# ssl_accept_server_cert_public_key property ([POP](#struct-ipworksedipop) Struct)

The public key of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_public_key(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The public key of the certificate. The key is provided as PEM/Base64-encoded data.

This property is read-only.

## Data Type

String

# ssl_accept_server_cert_public_key_algorithm property ([POP](#struct-ipworksedipop) Struct)

The textual description of the certificate's public key algorithm.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_public_key_algorithm(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The textual description of the certificate's public key algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_DH") or an object identifier (OID) string representing the algorithm.

This property is read-only.

## Data Type

String

# ssl_accept_server_cert_public_key_length property ([POP](#struct-ipworksedipop) Struct)

The length of the certificate's public key (in bits).

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_public_key_length(&self ) -> Result<i32, IPWorksEDIError>
```

## Default Value

0

## Remarks

The length of the certificate's public key (in bits). Common values are 512, 1024, and 2048.

This property is read-only.

## Data Type

i32

# ssl_accept_server_cert_serial_number property ([POP](#struct-ipworksedipop) Struct)

The serial number of the certificate encoded as a string.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_serial_number(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The serial number of the certificate encoded as a string. The number is encoded as a series of hexadecimal digits, with each pair representing a byte of the serial number.

This property is read-only.

## Data Type

String

# ssl_accept_server_cert_signature_algorithm property ([POP](#struct-ipworksedipop) Struct)

The text description of the certificate's signature algorithm.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_signature_algorithm(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The text description of the certificate's signature algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_MD5RSA") or an object identifier (OID) string representing the algorithm.

This property is read-only.

## Data Type

String

# ssl_accept_server_cert_store property ([POP](#struct-ipworksedipop) Struct)

The name of the certificate store for the client certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_store(&self ) -> Result<Vec<u8>, IPWorksEDIError> fn set_ssl_accept_server_cert_store(&self, value : Vec<u8>) ->  Option<IPWorksEDIError>
fn set_ssl_accept_server_cert_store_ref(&self, value : &[u8]) ->  Option<IPWorksEDIError>
```

## Default Value

"MY"

## Remarks

The name of the certificate store for the client certificate.

The [ssl_accept_server_cert_store_type](#ssl_accept_server_cert_store_type-property-pop-struct) property denotes the type of the certificate store specified by [ssl_accept_server_cert_store](#ssl_accept_server_cert_store-property-pop-struct). If the store is password-protected, specify the password in [ssl_accept_server_cert_store_password](#ssl_accept_server_cert_store_password-property-pop-struct).

[ssl_accept_server_cert_store](#ssl_accept_server_cert_store-property-pop-struct) is used in conjunction with the [ssl_accept_server_cert_subject](#ssl_accept_server_cert_subject-property-pop-struct) property to specify client certificates. If [ssl_accept_server_cert_store](#ssl_accept_server_cert_store-property-pop-struct) has a value, and [ssl_accept_server_cert_subject](#ssl_accept_server_cert_subject-property-pop-struct) or [ssl_accept_server_cert_encoded](#ssl_accept_server_cert_encoded-property-pop-struct) is set, a search for a certificate is initiated. Please see the [ssl_accept_server_cert_subject](#ssl_accept_server_cert_subject-property-pop-struct) property for details.

 Designations of certificate stores are platform dependent.

The following designations are the most common User and Machine certificate stores in Windows:

|  |  |
| --- | --- |
| MY | A certificate store holding personal certificates with their associated private keys. |
| CA | Certifying authority certificates. |
| ROOT | Root certificates. |

When the certificate store type is *cstPFXFile*, this property must be set to the name of the file. When the type is *cstPFXBlob*, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store).

## Data Type

Vec

# ssl_accept_server_cert_store_password property ([POP](#struct-ipworksedipop) Struct)

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_store_password(&self ) -> Result<String, IPWorksEDIError> fn set_ssl_accept_server_cert_store_password(&self, value : &str) ->  Option<IPWorksEDIError>
fn set_ssl_accept_server_cert_store_password_ref(&self, value : &String) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

## Data Type

String

# ssl_accept_server_cert_store_type property ([POP](#struct-ipworksedipop) Struct)

The type of certificate store for this certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_store_type(&self ) -> Result<i32, IPWorksEDIError> fn set_ssl_accept_server_cert_store_type(&self, value : i32) ->  Option<IPWorksEDIError>
```

## Possible Values

```text
0   // User1   // Machine2   // PFXFile3   // PFXBlob4   // JKSFile5   // JKSBlob6   // PEMKeyFile7   // PEMKeyBlob8   // PublicKeyFile9   // PublicKeyBlob10   // SSHPublicKeyBlob11   // P7BFile12   // P7BBlob13   // SSHPublicKeyFile14   // PPKFile15   // PPKBlob16   // XMLFile17   // XMLBlob18   // JWKFile19   // JWKBlob20   // SecurityKey21   // BCFKSFile22   // BCFKSBlob23   // PKCS1199   // Auto
```

## Default Value

0

## Remarks

The type of certificate store for this certificate.

 The struct supports both public and private keys in a variety of formats. When the *cstAuto* value is used, the struct will automatically determine the type. This property can take one of the following values:

```csharp
sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11,
                               @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll",
                               "123456", // PIN
                               "CN=cert_subject");
sftp.SSHUser = "test";
sftp.SSHLogon("myhost", 22);
```

```csharp
certmgr.CertStoreType = CertStoreTypes.cstPKCS11;
certmgr.OnCertList += (s, e) => {
  secKeyBlob = e.CertEncoded;
};
certmgr.CertStore = @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll";
certmgr.CertStorePassword = "123456"; // PIN
certmgr.ListStoreCertificates();

sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11, secKeyBlob, "123456", "*");
sftp.SSHUser = "test";
sftp.SSHLogon("myhost", 22);
```

|  |  |
| --- | --- |
| 0 (cstUser - default) | For Windows, this specifies that the certificate store is a certificate store owned by the current user. NOTE: This store type is not available in Java. |
| 1 (cstMachine) | For Windows, this specifies that the certificate store is a machine store. NOTE: This store type is not available in Java. |
| 2 (cstPFXFile) | The certificate store is the name of a PFX (PKCS#12) file containing certificates. |
| 3 (cstPFXBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in PFX (PKCS#12) format. |
| 4 (cstJKSFile) | The certificate store is the name of a Java Key Store (JKS) file containing certificates. NOTE: This store type is only available in Java. |
| 5 (cstJKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in Java Key Store (JKS) format. NOTE: This store type is only available in Java. |
| 6 (cstPEMKeyFile) | The certificate store is the name of a PEM-encoded file that contains a private key and an optional certificate. |
| 7 (cstPEMKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a private key and an optional certificate. |
| 8 (cstPublicKeyFile) | The certificate store is the name of a file that contains a PEM- or DER-encoded public key certificate. |
| 9 (cstPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a PEM- or DER-encoded public key certificate. |
| 10 (cstSSHPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains an SSH-style public key. |
| 11 (cstP7BFile) | The certificate store is the name of a PKCS#7 file containing certificates. |
| 12 (cstP7BBlob) | The certificate store is a string (binary) representing a certificate store in PKCS#7 format. |
| 13 (cstSSHPublicKeyFile) | The certificate store is the name of a file that contains an SSH-style public key. |
| 14 (cstPPKFile) | The certificate store is the name of a file that contains a PPK (PuTTY Private Key). |
| 15 (cstPPKBlob) | The certificate store is a string (binary) that contains a PPK (PuTTY Private Key). |
| 16 (cstXMLFile) | The certificate store is the name of a file that contains a certificate in XML format. |
| 17 (cstXMLBlob) | The certificate store is a string that contains a certificate in XML format. |
| 18 (cstJWKFile) | The certificate store is the name of a file that contains a JWK (JSON Web Key). |
| 19 (cstJWKBlob) | The certificate store is a string that contains a JWK (JSON Web Key). |
| 21 (cstBCFKSFile) | The certificate store is the name of a file that contains a BCFKS (Bouncy Castle FIPS Key Store). NOTE: This store type is only available in Java and .NET. |
| 22 (cstBCFKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in BCFKS (Bouncy Castle FIPS Key Store) format. NOTE: This store type is only available in Java and .NET. |
| 23 (cstPKCS11) | The certificate is present on a physical security key accessible via a PKCS#11 interface. To use a security key, create a new [Certificate](#Type_Certificate) object and pass cstPKCS11 as the [ssl_accept_server_cert_store_type](#ssl_accept_server_cert_store_type-property-pop-struct), the full path of the PKCS#11 DLL as the [ssl_accept_server_cert_store](#ssl_accept_server_cert_store-property-pop-struct), and the PIN as the [ssl_accept_server_cert_store_password](#ssl_accept_server_cert_store_password-property-pop-struct). Code Example. SSH Authentication with Security Key (without CertMgr): Alternatively, collect the necessary data using the [CertMgr](#CertMgr) struct by calling the [list_store_certificates](#CertMgr_m_ListStoreCertificates) method after setting the corresponding properties accordingly. The certificate information returned in the [on_cert_list](#CertMgr_e_CertList) event's CertEncoded parameter may be saved for later use. When using a certificate obtained with this approach, pass the previously saved security key information as the [ssl_accept_server_cert_store](#ssl_accept_server_cert_store-property-pop-struct) and set [ssl_accept_server_cert_store_password](#ssl_accept_server_cert_store_password-property-pop-struct) to the PIN. Code Example. SSH Authentication with Security Key (with CertMgr): |
| 99 (cstAuto) | The store type is automatically detected from the input data. This setting may be used with both public and private keys and can detect any of the supported formats automatically. |

## Data Type

i32

# ssl_accept_server_cert_subject_alt_names property ([POP](#struct-ipworksedipop) Struct)

Comma-separated lists of alternative subject names for the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_subject_alt_names(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

Comma-separated lists of alternative subject names for the certificate.

This property is read-only.

## Data Type

String

# ssl_accept_server_cert_thumbprint_md5 property ([POP](#struct-ipworksedipop) Struct)

The MD5 hash of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_thumbprint_md5(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The MD5 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

## Data Type

String

# ssl_accept_server_cert_thumbprint_sha1 property ([POP](#struct-ipworksedipop) Struct)

The SHA-1 hash of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_thumbprint_sha1(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The SHA-1 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

## Data Type

String

# ssl_accept_server_cert_thumbprint_sha256 property ([POP](#struct-ipworksedipop) Struct)

The SHA-256 hash of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_thumbprint_sha256(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The SHA-256 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

## Data Type

String

# ssl_accept_server_cert_usage property ([POP](#struct-ipworksedipop) Struct)

The text description of UsageFlags .

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_usage(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The text description of [ssl_accept_server_cert_usage_flags](#ssl_accept_server_cert_usage_flags-property-pop-struct).

This value will be one or more of the following strings and will be separated by commas:

- Digital Signature
- Non-Repudiation
- Key Encipherment
- Data Encipherment
- Key Agreement
- Certificate Signing
- CRL Signing
- Encipher Only

If the provider is OpenSSL, the value is a comma-separated list of X.509 certificate extension names.

This property is read-only.

## Data Type

String

# ssl_accept_server_cert_usage_flags property ([POP](#struct-ipworksedipop) Struct)

The flags that show intended use for the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_usage_flags(&self ) -> Result<i32, IPWorksEDIError>
```

## Default Value

0

## Remarks

The flags that show intended use for the certificate. The value of [ssl_accept_server_cert_usage_flags](#ssl_accept_server_cert_usage_flags-property-pop-struct) is a combination of the following flags:

|  |  |
| --- | --- |
| 0x80 | Digital Signature |
| 0x40 | Non-Repudiation |
| 0x20 | Key Encipherment |
| 0x10 | Data Encipherment |
| 0x08 | Key Agreement |
| 0x04 | Certificate Signing |
| 0x02 | CRL Signing |
| 0x01 | Encipher Only |

Please see the [ssl_accept_server_cert_usage](#ssl_accept_server_cert_usage-property-pop-struct) property for a text representation of [ssl_accept_server_cert_usage_flags](#ssl_accept_server_cert_usage_flags-property-pop-struct).

This functionality currently is not available when the provider is OpenSSL.

This property is read-only.

## Data Type

i32

# ssl_accept_server_cert_version property ([POP](#struct-ipworksedipop) Struct)

The certificate's version number.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_version(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The certificate's version number. The possible values are the strings "V1", "V2", and "V3".

This property is read-only.

## Data Type

String

# ssl_accept_server_cert_subject property ([POP](#struct-ipworksedipop) Struct)

The subject of the certificate used for client authentication.

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_subject(&self ) -> Result<String, IPWorksEDIError> fn set_ssl_accept_server_cert_subject(&self, value : &str) ->  Option<IPWorksEDIError>
fn set_ssl_accept_server_cert_subject_ref(&self, value : &String) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

The subject of the certificate used for client authentication.

This property must be set after all other certificate properties are set. When this property is set, a search is performed in the current certificate store to locate a certificate with a matching subject.

If a matching certificate is found, the property is set to the full subject of the matching certificate.

If an exact match is not found, the store is searched for subjects containing the value of the property.

If a match is still not found, the property is set to an empty string, and no certificate is selected.

The special value "*" picks a random certificate in the certificate store.

The certificate subject is a comma-separated list of distinguished name fields and values. For instance, "CN=www.server.com, OU=test, C=US, E=example@email.com". Common fields and their meanings are as follows:

| Field | Meaning |
| --- | --- |
| CN | Common Name. This is commonly a hostname like www.server.com. |
| O | Organization |
| OU | Organizational Unit |
| L | Locality |
| S | State |
| C | Country |
| E | Email Address |

If a field value contains a comma, it must be quoted.

## Data Type

String

# ssl_accept_server_cert_encoded property ([POP](#struct-ipworksedipop) Struct)

The certificate (PEM/Base64 encoded).

## Syntax

*Rust Syntax*

```text
fn ssl_accept_server_cert_encoded(&self ) -> Result<Vec<u8>, IPWorksEDIError> fn set_ssl_accept_server_cert_encoded(&self, value : Vec<u8>) ->  Option<IPWorksEDIError>
fn set_ssl_accept_server_cert_encoded_ref(&self, value : &[u8]) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

The certificate (PEM/Base64 encoded). This property is used to assign a specific certificate. The [ssl_accept_server_cert_store](#ssl_accept_server_cert_store-property-pop-struct) and [ssl_accept_server_cert_subject](#ssl_accept_server_cert_subject-property-pop-struct) properties also may be used to specify a certificate.

When [ssl_accept_server_cert_encoded](#ssl_accept_server_cert_encoded-property-pop-struct) is set, a search is initiated in the current [ssl_accept_server_cert_store](#ssl_accept_server_cert_store-property-pop-struct) for the private key of the certificate. If the key is found, [ssl_accept_server_cert_subject](#ssl_accept_server_cert_subject-property-pop-struct) is updated to reflect the full subject of the selected certificate; otherwise, [ssl_accept_server_cert_subject](#ssl_accept_server_cert_subject-property-pop-struct) is set to an empty string.

## Data Type

Vec

# ssl_cert_effective_date property ([POP](#struct-ipworksedipop) Struct)

The date on which this certificate becomes valid.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_effective_date(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The date on which this certificate becomes valid. Before this date, it is not valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2000 15:00:00.

This property is read-only.

## Data Type

String

# ssl_cert_expiration_date property ([POP](#struct-ipworksedipop) Struct)

The date on which the certificate expires.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_expiration_date(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The date on which the certificate expires. After this date, the certificate will no longer be valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2001 15:00:00.

This property is read-only.

## Data Type

String

# ssl_cert_extended_key_usage property ([POP](#struct-ipworksedipop) Struct)

A comma-delimited list of extended key usage identifiers.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_extended_key_usage(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

A comma-delimited list of extended key usage identifiers. These are the same as ASN.1 object identifiers (OIDs).

This property is read-only.

## Data Type

String

# ssl_cert_fingerprint property ([POP](#struct-ipworksedipop) Struct)

The hex-encoded, 16-byte MD5 fingerprint of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_fingerprint(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The hex-encoded, 16-byte MD5 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: *bc:2a:72:af:fe:58:17:43:7a:5f:ba:5a:7c:90:f7:02*

This property is read-only.

## Data Type

String

# ssl_cert_fingerprint_sha1 property ([POP](#struct-ipworksedipop) Struct)

The hex-encoded, 20-byte SHA-1 fingerprint of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_fingerprint_sha1(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: *30:7b:fa:38:65:83:ff:da:b4:4e:07:3f:17:b8:a4:ed:80:be:ff:84*

This property is read-only.

## Data Type

String

# ssl_cert_fingerprint_sha256 property ([POP](#struct-ipworksedipop) Struct)

The hex-encoded, 32-byte SHA-256 fingerprint of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_fingerprint_sha256(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: *6a:80:5c:33:a9:43:ea:b0:96:12:8a:64:96:30:ef:4a:8a:96:86:ce:f4:c7:be:10:24:8e:2b:60:9e:f3:59:53*

This property is read-only.

## Data Type

String

# ssl_cert_issuer property ([POP](#struct-ipworksedipop) Struct)

The issuer of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_issuer(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The issuer of the certificate. This property contains a string representation of the name of the issuing authority for the certificate.

This property is read-only.

## Data Type

String

# ssl_cert_private_key property ([POP](#struct-ipworksedipop) Struct)

The private key of the certificate (if available).

## Syntax

*Rust Syntax*

```text
fn ssl_cert_private_key(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The private key of the certificate (if available). The key is provided as PEM/Base64-encoded data.

NOTE: The [ssl_cert_private_key](#ssl_cert_private_key-property-pop-struct) may be available but not exportable. In this case, [ssl_cert_private_key](#ssl_cert_private_key-property-pop-struct) returns an empty string.

This property is read-only.

## Data Type

String

# ssl_cert_private_key_available property ([POP](#struct-ipworksedipop) Struct)

Whether a PrivateKey is available for the selected certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_private_key_available(&self ) -> Result<bool, IPWorksEDIError>
```

## Default Value

false

## Remarks

Whether a [ssl_cert_private_key](#ssl_cert_private_key-property-pop-struct) is available for the selected certificate. If [ssl_cert_private_key_available](#ssl_cert_private_key_available-property-pop-struct) is True, the certificate may be used for authentication purposes (e.g., server authentication).

This property is read-only.

## Data Type

bool

# ssl_cert_private_key_container property ([POP](#struct-ipworksedipop) Struct)

The name of the PrivateKey container for the certificate (if available).

## Syntax

*Rust Syntax*

```text
fn ssl_cert_private_key_container(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The name of the [ssl_cert_private_key](#ssl_cert_private_key-property-pop-struct) container for the certificate (if available). This functionality is available only on Windows platforms.

This property is read-only.

## Data Type

String

# ssl_cert_public_key property ([POP](#struct-ipworksedipop) Struct)

The public key of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_public_key(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The public key of the certificate. The key is provided as PEM/Base64-encoded data.

This property is read-only.

## Data Type

String

# ssl_cert_public_key_algorithm property ([POP](#struct-ipworksedipop) Struct)

The textual description of the certificate's public key algorithm.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_public_key_algorithm(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The textual description of the certificate's public key algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_DH") or an object identifier (OID) string representing the algorithm.

This property is read-only.

## Data Type

String

# ssl_cert_public_key_length property ([POP](#struct-ipworksedipop) Struct)

The length of the certificate's public key (in bits).

## Syntax

*Rust Syntax*

```text
fn ssl_cert_public_key_length(&self ) -> Result<i32, IPWorksEDIError>
```

## Default Value

0

## Remarks

The length of the certificate's public key (in bits). Common values are 512, 1024, and 2048.

This property is read-only.

## Data Type

i32

# ssl_cert_serial_number property ([POP](#struct-ipworksedipop) Struct)

The serial number of the certificate encoded as a string.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_serial_number(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The serial number of the certificate encoded as a string. The number is encoded as a series of hexadecimal digits, with each pair representing a byte of the serial number.

This property is read-only.

## Data Type

String

# ssl_cert_signature_algorithm property ([POP](#struct-ipworksedipop) Struct)

The text description of the certificate's signature algorithm.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_signature_algorithm(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The text description of the certificate's signature algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_MD5RSA") or an object identifier (OID) string representing the algorithm.

This property is read-only.

## Data Type

String

# ssl_cert_store property ([POP](#struct-ipworksedipop) Struct)

The name of the certificate store for the client certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_store(&self ) -> Result<Vec<u8>, IPWorksEDIError> fn set_ssl_cert_store(&self, value : Vec<u8>) ->  Option<IPWorksEDIError>
fn set_ssl_cert_store_ref(&self, value : &[u8]) ->  Option<IPWorksEDIError>
```

## Default Value

"MY"

## Remarks

The name of the certificate store for the client certificate.

The [ssl_cert_store_type](#ssl_cert_store_type-property-pop-struct) property denotes the type of the certificate store specified by [ssl_cert_store](#ssl_cert_store-property-pop-struct). If the store is password-protected, specify the password in [ssl_cert_store_password](#ssl_cert_store_password-property-pop-struct).

[ssl_cert_store](#ssl_cert_store-property-pop-struct) is used in conjunction with the [ssl_cert_subject](#ssl_cert_subject-property-pop-struct) property to specify client certificates. If [ssl_cert_store](#ssl_cert_store-property-pop-struct) has a value, and [ssl_cert_subject](#ssl_cert_subject-property-pop-struct) or [ssl_cert_encoded](#ssl_cert_encoded-property-pop-struct) is set, a search for a certificate is initiated. Please see the [ssl_cert_subject](#ssl_cert_subject-property-pop-struct) property for details.

 Designations of certificate stores are platform dependent.

The following designations are the most common User and Machine certificate stores in Windows:

|  |  |
| --- | --- |
| MY | A certificate store holding personal certificates with their associated private keys. |
| CA | Certifying authority certificates. |
| ROOT | Root certificates. |

When the certificate store type is *cstPFXFile*, this property must be set to the name of the file. When the type is *cstPFXBlob*, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store).

## Data Type

Vec

# ssl_cert_store_password property ([POP](#struct-ipworksedipop) Struct)

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_store_password(&self ) -> Result<String, IPWorksEDIError> fn set_ssl_cert_store_password(&self, value : &str) ->  Option<IPWorksEDIError>
fn set_ssl_cert_store_password_ref(&self, value : &String) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

## Data Type

String

# ssl_cert_store_type property ([POP](#struct-ipworksedipop) Struct)

The type of certificate store for this certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_store_type(&self ) -> Result<i32, IPWorksEDIError> fn set_ssl_cert_store_type(&self, value : i32) ->  Option<IPWorksEDIError>
```

## Possible Values

```text
0   // User1   // Machine2   // PFXFile3   // PFXBlob4   // JKSFile5   // JKSBlob6   // PEMKeyFile7   // PEMKeyBlob8   // PublicKeyFile9   // PublicKeyBlob10   // SSHPublicKeyBlob11   // P7BFile12   // P7BBlob13   // SSHPublicKeyFile14   // PPKFile15   // PPKBlob16   // XMLFile17   // XMLBlob18   // JWKFile19   // JWKBlob20   // SecurityKey21   // BCFKSFile22   // BCFKSBlob23   // PKCS1199   // Auto
```

## Default Value

0

## Remarks

The type of certificate store for this certificate.

 The struct supports both public and private keys in a variety of formats. When the *cstAuto* value is used, the struct will automatically determine the type. This property can take one of the following values:

```csharp
sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11,
                               @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll",
                               "123456", // PIN
                               "CN=cert_subject");
sftp.SSHUser = "test";
sftp.SSHLogon("myhost", 22);
```

```csharp
certmgr.CertStoreType = CertStoreTypes.cstPKCS11;
certmgr.OnCertList += (s, e) => {
  secKeyBlob = e.CertEncoded;
};
certmgr.CertStore = @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll";
certmgr.CertStorePassword = "123456"; // PIN
certmgr.ListStoreCertificates();

sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11, secKeyBlob, "123456", "*");
sftp.SSHUser = "test";
sftp.SSHLogon("myhost", 22);
```

|  |  |
| --- | --- |
| 0 (cstUser - default) | For Windows, this specifies that the certificate store is a certificate store owned by the current user. NOTE: This store type is not available in Java. |
| 1 (cstMachine) | For Windows, this specifies that the certificate store is a machine store. NOTE: This store type is not available in Java. |
| 2 (cstPFXFile) | The certificate store is the name of a PFX (PKCS#12) file containing certificates. |
| 3 (cstPFXBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in PFX (PKCS#12) format. |
| 4 (cstJKSFile) | The certificate store is the name of a Java Key Store (JKS) file containing certificates. NOTE: This store type is only available in Java. |
| 5 (cstJKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in Java Key Store (JKS) format. NOTE: This store type is only available in Java. |
| 6 (cstPEMKeyFile) | The certificate store is the name of a PEM-encoded file that contains a private key and an optional certificate. |
| 7 (cstPEMKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a private key and an optional certificate. |
| 8 (cstPublicKeyFile) | The certificate store is the name of a file that contains a PEM- or DER-encoded public key certificate. |
| 9 (cstPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a PEM- or DER-encoded public key certificate. |
| 10 (cstSSHPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains an SSH-style public key. |
| 11 (cstP7BFile) | The certificate store is the name of a PKCS#7 file containing certificates. |
| 12 (cstP7BBlob) | The certificate store is a string (binary) representing a certificate store in PKCS#7 format. |
| 13 (cstSSHPublicKeyFile) | The certificate store is the name of a file that contains an SSH-style public key. |
| 14 (cstPPKFile) | The certificate store is the name of a file that contains a PPK (PuTTY Private Key). |
| 15 (cstPPKBlob) | The certificate store is a string (binary) that contains a PPK (PuTTY Private Key). |
| 16 (cstXMLFile) | The certificate store is the name of a file that contains a certificate in XML format. |
| 17 (cstXMLBlob) | The certificate store is a string that contains a certificate in XML format. |
| 18 (cstJWKFile) | The certificate store is the name of a file that contains a JWK (JSON Web Key). |
| 19 (cstJWKBlob) | The certificate store is a string that contains a JWK (JSON Web Key). |
| 21 (cstBCFKSFile) | The certificate store is the name of a file that contains a BCFKS (Bouncy Castle FIPS Key Store). NOTE: This store type is only available in Java and .NET. |
| 22 (cstBCFKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in BCFKS (Bouncy Castle FIPS Key Store) format. NOTE: This store type is only available in Java and .NET. |
| 23 (cstPKCS11) | The certificate is present on a physical security key accessible via a PKCS#11 interface. To use a security key, create a new [Certificate](#Type_Certificate) object and pass cstPKCS11 as the [ssl_cert_store_type](#ssl_cert_store_type-property-pop-struct), the full path of the PKCS#11 DLL as the [ssl_cert_store](#ssl_cert_store-property-pop-struct), and the PIN as the [ssl_cert_store_password](#ssl_cert_store_password-property-pop-struct). Code Example. SSH Authentication with Security Key (without CertMgr): Alternatively, collect the necessary data using the [CertMgr](#CertMgr) struct by calling the [list_store_certificates](#CertMgr_m_ListStoreCertificates) method after setting the corresponding properties accordingly. The certificate information returned in the [on_cert_list](#CertMgr_e_CertList) event's CertEncoded parameter may be saved for later use. When using a certificate obtained with this approach, pass the previously saved security key information as the [ssl_cert_store](#ssl_cert_store-property-pop-struct) and set [ssl_cert_store_password](#ssl_cert_store_password-property-pop-struct) to the PIN. Code Example. SSH Authentication with Security Key (with CertMgr): |
| 99 (cstAuto) | The store type is automatically detected from the input data. This setting may be used with both public and private keys and can detect any of the supported formats automatically. |

## Data Type

i32

# ssl_cert_subject_alt_names property ([POP](#struct-ipworksedipop) Struct)

Comma-separated lists of alternative subject names for the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_subject_alt_names(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

Comma-separated lists of alternative subject names for the certificate.

This property is read-only.

## Data Type

String

# ssl_cert_thumbprint_md5 property ([POP](#struct-ipworksedipop) Struct)

The MD5 hash of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_thumbprint_md5(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The MD5 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

## Data Type

String

# ssl_cert_thumbprint_sha1 property ([POP](#struct-ipworksedipop) Struct)

The SHA-1 hash of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_thumbprint_sha1(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The SHA-1 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

## Data Type

String

# ssl_cert_thumbprint_sha256 property ([POP](#struct-ipworksedipop) Struct)

The SHA-256 hash of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_thumbprint_sha256(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The SHA-256 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

## Data Type

String

# ssl_cert_usage property ([POP](#struct-ipworksedipop) Struct)

The text description of UsageFlags .

## Syntax

*Rust Syntax*

```text
fn ssl_cert_usage(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The text description of [ssl_cert_usage_flags](#ssl_cert_usage_flags-property-pop-struct).

This value will be one or more of the following strings and will be separated by commas:

- Digital Signature
- Non-Repudiation
- Key Encipherment
- Data Encipherment
- Key Agreement
- Certificate Signing
- CRL Signing
- Encipher Only

If the provider is OpenSSL, the value is a comma-separated list of X.509 certificate extension names.

This property is read-only.

## Data Type

String

# ssl_cert_usage_flags property ([POP](#struct-ipworksedipop) Struct)

The flags that show intended use for the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_usage_flags(&self ) -> Result<i32, IPWorksEDIError>
```

## Default Value

0

## Remarks

The flags that show intended use for the certificate. The value of [ssl_cert_usage_flags](#ssl_cert_usage_flags-property-pop-struct) is a combination of the following flags:

|  |  |
| --- | --- |
| 0x80 | Digital Signature |
| 0x40 | Non-Repudiation |
| 0x20 | Key Encipherment |
| 0x10 | Data Encipherment |
| 0x08 | Key Agreement |
| 0x04 | Certificate Signing |
| 0x02 | CRL Signing |
| 0x01 | Encipher Only |

Please see the [ssl_cert_usage](#ssl_cert_usage-property-pop-struct) property for a text representation of [ssl_cert_usage_flags](#ssl_cert_usage_flags-property-pop-struct).

This functionality currently is not available when the provider is OpenSSL.

This property is read-only.

## Data Type

i32

# ssl_cert_version property ([POP](#struct-ipworksedipop) Struct)

The certificate's version number.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_version(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The certificate's version number. The possible values are the strings "V1", "V2", and "V3".

This property is read-only.

## Data Type

String

# ssl_cert_subject property ([POP](#struct-ipworksedipop) Struct)

The subject of the certificate used for client authentication.

## Syntax

*Rust Syntax*

```text
fn ssl_cert_subject(&self ) -> Result<String, IPWorksEDIError> fn set_ssl_cert_subject(&self, value : &str) ->  Option<IPWorksEDIError>
fn set_ssl_cert_subject_ref(&self, value : &String) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

The subject of the certificate used for client authentication.

This property must be set after all other certificate properties are set. When this property is set, a search is performed in the current certificate store to locate a certificate with a matching subject.

If a matching certificate is found, the property is set to the full subject of the matching certificate.

If an exact match is not found, the store is searched for subjects containing the value of the property.

If a match is still not found, the property is set to an empty string, and no certificate is selected.

The special value "*" picks a random certificate in the certificate store.

The certificate subject is a comma-separated list of distinguished name fields and values. For instance, "CN=www.server.com, OU=test, C=US, E=example@email.com". Common fields and their meanings are as follows:

| Field | Meaning |
| --- | --- |
| CN | Common Name. This is commonly a hostname like www.server.com. |
| O | Organization |
| OU | Organizational Unit |
| L | Locality |
| S | State |
| C | Country |
| E | Email Address |

If a field value contains a comma, it must be quoted.

## Data Type

String

# ssl_cert_encoded property ([POP](#struct-ipworksedipop) Struct)

The certificate (PEM/Base64 encoded).

## Syntax

*Rust Syntax*

```text
fn ssl_cert_encoded(&self ) -> Result<Vec<u8>, IPWorksEDIError> fn set_ssl_cert_encoded(&self, value : Vec<u8>) ->  Option<IPWorksEDIError>
fn set_ssl_cert_encoded_ref(&self, value : &[u8]) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

The certificate (PEM/Base64 encoded). This property is used to assign a specific certificate. The [ssl_cert_store](#ssl_cert_store-property-pop-struct) and [ssl_cert_subject](#ssl_cert_subject-property-pop-struct) properties also may be used to specify a certificate.

When [ssl_cert_encoded](#ssl_cert_encoded-property-pop-struct) is set, a search is initiated in the current [ssl_cert_store](#ssl_cert_store-property-pop-struct) for the private key of the certificate. If the key is found, [ssl_cert_subject](#ssl_cert_subject-property-pop-struct) is updated to reflect the full subject of the selected certificate; otherwise, [ssl_cert_subject](#ssl_cert_subject-property-pop-struct) is set to an empty string.

## Data Type

Vec

# ssl_enabled property ([POP](#struct-ipworksedipop) Struct)

This property indicates whether Transport Layer Security/Secure Sockets Layer (TLS/SSL) is enabled.

## Syntax

*Rust Syntax*

```text
fn ssl_enabled(&self ) -> Result<bool, IPWorksEDIError> fn set_ssl_enabled(&self, value : bool) ->  Option<IPWorksEDIError>
```

## Default Value

false

## Remarks

This property specifies whether TLS/SSL is enabled in the struct. When False (default), the struct operates in plaintext mode. When True, TLS/SSL is enabled.

TLS/SSL may also be enabled by setting [ssl_start_mode](#ssl_start_mode-property-pop-struct). Setting [ssl_start_mode](#ssl_start_mode-property-pop-struct) will automatically update this property value.

## Data Type

bool

# ssl_provider property ([POP](#struct-ipworksedipop) Struct)

The Secure Sockets Layer/Transport Layer Security (SSL/TLS) implementation to use.

## Syntax

*Rust Syntax*

```text
fn ssl_provider(&self ) -> Result<i32, IPWorksEDIError> fn set_ssl_provider(&self, value : i32) ->  Option<IPWorksEDIError>
```

## Possible Values

```text
0   // Automatic1   // Platform2   // Internal
```

## Default Value

0

## Remarks

This property specifies the SSL/TLS implementation to use. In most cases the default value of *0* (Automatic) is recommended and should not be changed. When set to *0* (Automatic), the struct will select whether to use the platform implementation or the internal implementation depending on the operating system as well as the TLS version being used.

Possible values are as follows:

|  |  |
| --- | --- |
| 0 (sslpAutomatic - default) | Automatically selects the appropriate implementation. |
| 1 (sslpPlatform) | Uses the platform/system implementation. |
| 2 (sslpInternal) | Uses the internal implementation. |

 **Additional Notes**

In most cases using the default value (Automatic) is recommended. The struct will select a provider depending on the current platform.

When Automatic is selected, on Windows, the struct will use the platform implementation. On Linux/macOS, the struct will use the internal implementation. When TLS 1.3 is enabled via [SSLEnabledProtocols](#SSLEnabledProtocols), the struct will always try and use the platform implementation. If the platform TLS 1.3 implementation is not available, the internal implementation will be used.

## Data Type

i32

# ssl_server_cert_effective_date property ([POP](#struct-ipworksedipop) Struct)

The date on which this certificate becomes valid.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_effective_date(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The date on which this certificate becomes valid. Before this date, it is not valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2000 15:00:00.

This property is read-only.

## Data Type

String

# ssl_server_cert_expiration_date property ([POP](#struct-ipworksedipop) Struct)

The date on which the certificate expires.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_expiration_date(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The date on which the certificate expires. After this date, the certificate will no longer be valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2001 15:00:00.

This property is read-only.

## Data Type

String

# ssl_server_cert_extended_key_usage property ([POP](#struct-ipworksedipop) Struct)

A comma-delimited list of extended key usage identifiers.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_extended_key_usage(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

A comma-delimited list of extended key usage identifiers. These are the same as ASN.1 object identifiers (OIDs).

This property is read-only.

## Data Type

String

# ssl_server_cert_fingerprint property ([POP](#struct-ipworksedipop) Struct)

The hex-encoded, 16-byte MD5 fingerprint of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_fingerprint(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The hex-encoded, 16-byte MD5 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: *bc:2a:72:af:fe:58:17:43:7a:5f:ba:5a:7c:90:f7:02*

This property is read-only.

## Data Type

String

# ssl_server_cert_fingerprint_sha1 property ([POP](#struct-ipworksedipop) Struct)

The hex-encoded, 20-byte SHA-1 fingerprint of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_fingerprint_sha1(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: *30:7b:fa:38:65:83:ff:da:b4:4e:07:3f:17:b8:a4:ed:80:be:ff:84*

This property is read-only.

## Data Type

String

# ssl_server_cert_fingerprint_sha256 property ([POP](#struct-ipworksedipop) Struct)

The hex-encoded, 32-byte SHA-256 fingerprint of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_fingerprint_sha256(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: *6a:80:5c:33:a9:43:ea:b0:96:12:8a:64:96:30:ef:4a:8a:96:86:ce:f4:c7:be:10:24:8e:2b:60:9e:f3:59:53*

This property is read-only.

## Data Type

String

# ssl_server_cert_issuer property ([POP](#struct-ipworksedipop) Struct)

The issuer of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_issuer(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The issuer of the certificate. This property contains a string representation of the name of the issuing authority for the certificate.

This property is read-only.

## Data Type

String

# ssl_server_cert_private_key property ([POP](#struct-ipworksedipop) Struct)

The private key of the certificate (if available).

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_private_key(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The private key of the certificate (if available). The key is provided as PEM/Base64-encoded data.

NOTE: The [ssl_server_cert_private_key](#ssl_server_cert_private_key-property-pop-struct) may be available but not exportable. In this case, [ssl_server_cert_private_key](#ssl_server_cert_private_key-property-pop-struct) returns an empty string.

This property is read-only.

## Data Type

String

# ssl_server_cert_private_key_available property ([POP](#struct-ipworksedipop) Struct)

Whether a PrivateKey is available for the selected certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_private_key_available(&self ) -> Result<bool, IPWorksEDIError>
```

## Default Value

false

## Remarks

Whether a [ssl_server_cert_private_key](#ssl_server_cert_private_key-property-pop-struct) is available for the selected certificate. If [ssl_server_cert_private_key_available](#ssl_server_cert_private_key_available-property-pop-struct) is True, the certificate may be used for authentication purposes (e.g., server authentication).

This property is read-only.

## Data Type

bool

# ssl_server_cert_private_key_container property ([POP](#struct-ipworksedipop) Struct)

The name of the PrivateKey container for the certificate (if available).

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_private_key_container(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The name of the [ssl_server_cert_private_key](#ssl_server_cert_private_key-property-pop-struct) container for the certificate (if available). This functionality is available only on Windows platforms.

This property is read-only.

## Data Type

String

# ssl_server_cert_public_key property ([POP](#struct-ipworksedipop) Struct)

The public key of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_public_key(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The public key of the certificate. The key is provided as PEM/Base64-encoded data.

This property is read-only.

## Data Type

String

# ssl_server_cert_public_key_algorithm property ([POP](#struct-ipworksedipop) Struct)

The textual description of the certificate's public key algorithm.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_public_key_algorithm(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The textual description of the certificate's public key algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_DH") or an object identifier (OID) string representing the algorithm.

This property is read-only.

## Data Type

String

# ssl_server_cert_public_key_length property ([POP](#struct-ipworksedipop) Struct)

The length of the certificate's public key (in bits).

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_public_key_length(&self ) -> Result<i32, IPWorksEDIError>
```

## Default Value

0

## Remarks

The length of the certificate's public key (in bits). Common values are 512, 1024, and 2048.

This property is read-only.

## Data Type

i32

# ssl_server_cert_serial_number property ([POP](#struct-ipworksedipop) Struct)

The serial number of the certificate encoded as a string.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_serial_number(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The serial number of the certificate encoded as a string. The number is encoded as a series of hexadecimal digits, with each pair representing a byte of the serial number.

This property is read-only.

## Data Type

String

# ssl_server_cert_signature_algorithm property ([POP](#struct-ipworksedipop) Struct)

The text description of the certificate's signature algorithm.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_signature_algorithm(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The text description of the certificate's signature algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_MD5RSA") or an object identifier (OID) string representing the algorithm.

This property is read-only.

## Data Type

String

# ssl_server_cert_store property ([POP](#struct-ipworksedipop) Struct)

The name of the certificate store for the client certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_store(&self ) -> Result<Vec<u8>, IPWorksEDIError>
```

## Default Value

"MY"

## Remarks

The name of the certificate store for the client certificate.

The [ssl_server_cert_store_type](#ssl_server_cert_store_type-property-pop-struct) property denotes the type of the certificate store specified by [ssl_server_cert_store](#ssl_server_cert_store-property-pop-struct). If the store is password-protected, specify the password in [ssl_server_cert_store_password](#ssl_server_cert_store_password-property-pop-struct).

[ssl_server_cert_store](#ssl_server_cert_store-property-pop-struct) is used in conjunction with the [ssl_server_cert_subject](#ssl_server_cert_subject-property-pop-struct) property to specify client certificates. If [ssl_server_cert_store](#ssl_server_cert_store-property-pop-struct) has a value, and [ssl_server_cert_subject](#ssl_server_cert_subject-property-pop-struct) or [ssl_server_cert_encoded](#ssl_server_cert_encoded-property-pop-struct) is set, a search for a certificate is initiated. Please see the [ssl_server_cert_subject](#ssl_server_cert_subject-property-pop-struct) property for details.

 Designations of certificate stores are platform dependent.

The following designations are the most common User and Machine certificate stores in Windows:

|  |  |
| --- | --- |
| MY | A certificate store holding personal certificates with their associated private keys. |
| CA | Certifying authority certificates. |
| ROOT | Root certificates. |

When the certificate store type is *cstPFXFile*, this property must be set to the name of the file. When the type is *cstPFXBlob*, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store).

This property is read-only.

## Data Type

Vec

# ssl_server_cert_store_password property ([POP](#struct-ipworksedipop) Struct)

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_store_password(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

This property is read-only.

## Data Type

String

# ssl_server_cert_store_type property ([POP](#struct-ipworksedipop) Struct)

The type of certificate store for this certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_store_type(&self ) -> Result<i32, IPWorksEDIError>
```

## Possible Values

```text
0   // User1   // Machine2   // PFXFile3   // PFXBlob4   // JKSFile5   // JKSBlob6   // PEMKeyFile7   // PEMKeyBlob8   // PublicKeyFile9   // PublicKeyBlob10   // SSHPublicKeyBlob11   // P7BFile12   // P7BBlob13   // SSHPublicKeyFile14   // PPKFile15   // PPKBlob16   // XMLFile17   // XMLBlob18   // JWKFile19   // JWKBlob20   // SecurityKey21   // BCFKSFile22   // BCFKSBlob23   // PKCS1199   // Auto
```

## Default Value

0

## Remarks

The type of certificate store for this certificate.

 The struct supports both public and private keys in a variety of formats. When the *cstAuto* value is used, the struct will automatically determine the type. This property can take one of the following values:

```csharp
sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11,
                               @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll",
                               "123456", // PIN
                               "CN=cert_subject");
sftp.SSHUser = "test";
sftp.SSHLogon("myhost", 22);
```

```csharp
certmgr.CertStoreType = CertStoreTypes.cstPKCS11;
certmgr.OnCertList += (s, e) => {
  secKeyBlob = e.CertEncoded;
};
certmgr.CertStore = @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll";
certmgr.CertStorePassword = "123456"; // PIN
certmgr.ListStoreCertificates();

sftp.SSHCert = new Certificate(CertStoreTypes.cstPKCS11, secKeyBlob, "123456", "*");
sftp.SSHUser = "test";
sftp.SSHLogon("myhost", 22);
```

|  |  |
| --- | --- |
| 0 (cstUser - default) | For Windows, this specifies that the certificate store is a certificate store owned by the current user. NOTE: This store type is not available in Java. |
| 1 (cstMachine) | For Windows, this specifies that the certificate store is a machine store. NOTE: This store type is not available in Java. |
| 2 (cstPFXFile) | The certificate store is the name of a PFX (PKCS#12) file containing certificates. |
| 3 (cstPFXBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in PFX (PKCS#12) format. |
| 4 (cstJKSFile) | The certificate store is the name of a Java Key Store (JKS) file containing certificates. NOTE: This store type is only available in Java. |
| 5 (cstJKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in Java Key Store (JKS) format. NOTE: This store type is only available in Java. |
| 6 (cstPEMKeyFile) | The certificate store is the name of a PEM-encoded file that contains a private key and an optional certificate. |
| 7 (cstPEMKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a private key and an optional certificate. |
| 8 (cstPublicKeyFile) | The certificate store is the name of a file that contains a PEM- or DER-encoded public key certificate. |
| 9 (cstPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains a PEM- or DER-encoded public key certificate. |
| 10 (cstSSHPublicKeyBlob) | The certificate store is a string (binary or Base64-encoded) that contains an SSH-style public key. |
| 11 (cstP7BFile) | The certificate store is the name of a PKCS#7 file containing certificates. |
| 12 (cstP7BBlob) | The certificate store is a string (binary) representing a certificate store in PKCS#7 format. |
| 13 (cstSSHPublicKeyFile) | The certificate store is the name of a file that contains an SSH-style public key. |
| 14 (cstPPKFile) | The certificate store is the name of a file that contains a PPK (PuTTY Private Key). |
| 15 (cstPPKBlob) | The certificate store is a string (binary) that contains a PPK (PuTTY Private Key). |
| 16 (cstXMLFile) | The certificate store is the name of a file that contains a certificate in XML format. |
| 17 (cstXMLBlob) | The certificate store is a string that contains a certificate in XML format. |
| 18 (cstJWKFile) | The certificate store is the name of a file that contains a JWK (JSON Web Key). |
| 19 (cstJWKBlob) | The certificate store is a string that contains a JWK (JSON Web Key). |
| 21 (cstBCFKSFile) | The certificate store is the name of a file that contains a BCFKS (Bouncy Castle FIPS Key Store). NOTE: This store type is only available in Java and .NET. |
| 22 (cstBCFKSBlob) | The certificate store is a string (binary or Base64-encoded) representing a certificate store in BCFKS (Bouncy Castle FIPS Key Store) format. NOTE: This store type is only available in Java and .NET. |
| 23 (cstPKCS11) | The certificate is present on a physical security key accessible via a PKCS#11 interface. To use a security key, create a new [Certificate](#Type_Certificate) object and pass cstPKCS11 as the [ssl_server_cert_store_type](#ssl_server_cert_store_type-property-pop-struct), the full path of the PKCS#11 DLL as the [ssl_server_cert_store](#ssl_server_cert_store-property-pop-struct), and the PIN as the [ssl_server_cert_store_password](#ssl_server_cert_store_password-property-pop-struct). Code Example. SSH Authentication with Security Key (without CertMgr): Alternatively, collect the necessary data using the [CertMgr](#CertMgr) struct by calling the [list_store_certificates](#CertMgr_m_ListStoreCertificates) method after setting the corresponding properties accordingly. The certificate information returned in the [on_cert_list](#CertMgr_e_CertList) event's CertEncoded parameter may be saved for later use. When using a certificate obtained with this approach, pass the previously saved security key information as the [ssl_server_cert_store](#ssl_server_cert_store-property-pop-struct) and set [ssl_server_cert_store_password](#ssl_server_cert_store_password-property-pop-struct) to the PIN. Code Example. SSH Authentication with Security Key (with CertMgr): |
| 99 (cstAuto) | The store type is automatically detected from the input data. This setting may be used with both public and private keys and can detect any of the supported formats automatically. |

This property is read-only.

## Data Type

i32

# ssl_server_cert_subject_alt_names property ([POP](#struct-ipworksedipop) Struct)

Comma-separated lists of alternative subject names for the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_subject_alt_names(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

Comma-separated lists of alternative subject names for the certificate.

This property is read-only.

## Data Type

String

# ssl_server_cert_thumbprint_md5 property ([POP](#struct-ipworksedipop) Struct)

The MD5 hash of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_thumbprint_md5(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The MD5 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

## Data Type

String

# ssl_server_cert_thumbprint_sha1 property ([POP](#struct-ipworksedipop) Struct)

The SHA-1 hash of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_thumbprint_sha1(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The SHA-1 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

## Data Type

String

# ssl_server_cert_thumbprint_sha256 property ([POP](#struct-ipworksedipop) Struct)

The SHA-256 hash of the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_thumbprint_sha256(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The SHA-256 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

## Data Type

String

# ssl_server_cert_usage property ([POP](#struct-ipworksedipop) Struct)

The text description of UsageFlags .

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_usage(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The text description of [ssl_server_cert_usage_flags](#ssl_server_cert_usage_flags-property-pop-struct).

This value will be one or more of the following strings and will be separated by commas:

- Digital Signature
- Non-Repudiation
- Key Encipherment
- Data Encipherment
- Key Agreement
- Certificate Signing
- CRL Signing
- Encipher Only

If the provider is OpenSSL, the value is a comma-separated list of X.509 certificate extension names.

This property is read-only.

## Data Type

String

# ssl_server_cert_usage_flags property ([POP](#struct-ipworksedipop) Struct)

The flags that show intended use for the certificate.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_usage_flags(&self ) -> Result<i32, IPWorksEDIError>
```

## Default Value

0

## Remarks

The flags that show intended use for the certificate. The value of [ssl_server_cert_usage_flags](#ssl_server_cert_usage_flags-property-pop-struct) is a combination of the following flags:

|  |  |
| --- | --- |
| 0x80 | Digital Signature |
| 0x40 | Non-Repudiation |
| 0x20 | Key Encipherment |
| 0x10 | Data Encipherment |
| 0x08 | Key Agreement |
| 0x04 | Certificate Signing |
| 0x02 | CRL Signing |
| 0x01 | Encipher Only |

Please see the [ssl_server_cert_usage](#ssl_server_cert_usage-property-pop-struct) property for a text representation of [ssl_server_cert_usage_flags](#ssl_server_cert_usage_flags-property-pop-struct).

This functionality currently is not available when the provider is OpenSSL.

This property is read-only.

## Data Type

i32

# ssl_server_cert_version property ([POP](#struct-ipworksedipop) Struct)

The certificate's version number.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_version(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The certificate's version number. The possible values are the strings "V1", "V2", and "V3".

This property is read-only.

## Data Type

String

# ssl_server_cert_subject property ([POP](#struct-ipworksedipop) Struct)

The subject of the certificate used for client authentication.

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_subject(&self ) -> Result<String, IPWorksEDIError>
```

## Default Value

""

## Remarks

The subject of the certificate used for client authentication.

This property must be set after all other certificate properties are set. When this property is set, a search is performed in the current certificate store to locate a certificate with a matching subject.

If a matching certificate is found, the property is set to the full subject of the matching certificate.

If an exact match is not found, the store is searched for subjects containing the value of the property.

If a match is still not found, the property is set to an empty string, and no certificate is selected.

The special value "*" picks a random certificate in the certificate store.

The certificate subject is a comma-separated list of distinguished name fields and values. For instance, "CN=www.server.com, OU=test, C=US, E=example@email.com". Common fields and their meanings are as follows:

| Field | Meaning |
| --- | --- |
| CN | Common Name. This is commonly a hostname like www.server.com. |
| O | Organization |
| OU | Organizational Unit |
| L | Locality |
| S | State |
| C | Country |
| E | Email Address |

If a field value contains a comma, it must be quoted.

This property is read-only.

## Data Type

String

# ssl_server_cert_encoded property ([POP](#struct-ipworksedipop) Struct)

The certificate (PEM/Base64 encoded).

## Syntax

*Rust Syntax*

```text
fn ssl_server_cert_encoded(&self ) -> Result<Vec<u8>, IPWorksEDIError>
```

## Default Value

""

## Remarks

The certificate (PEM/Base64 encoded). This property is used to assign a specific certificate. The [ssl_server_cert_store](#ssl_server_cert_store-property-pop-struct) and [ssl_server_cert_subject](#ssl_server_cert_subject-property-pop-struct) properties also may be used to specify a certificate.

When [ssl_server_cert_encoded](#ssl_server_cert_encoded-property-pop-struct) is set, a search is initiated in the current [ssl_server_cert_store](#ssl_server_cert_store-property-pop-struct) for the private key of the certificate. If the key is found, [ssl_server_cert_subject](#ssl_server_cert_subject-property-pop-struct) is updated to reflect the full subject of the selected certificate; otherwise, [ssl_server_cert_subject](#ssl_server_cert_subject-property-pop-struct) is set to an empty string.

This property is read-only.

## Data Type

Vec

# ssl_start_mode property ([POP](#struct-ipworksedipop) Struct)

This property determines how the struct starts the Secure Sockets Layer (SSL) negotiation.

## Syntax

*Rust Syntax*

```text
fn ssl_start_mode(&self ) -> Result<i32, IPWorksEDIError> fn set_ssl_start_mode(&self, value : i32) ->  Option<IPWorksEDIError>
```

## Possible Values

```text
0   // Automatic1   // Implicit2   // Explicit3   // None
```

## Default Value

3

## Remarks

The ssl_start_mode property may have one of the following values:

|  |  |
| --- | --- |
| 0 (sslAutomatic) | If the remote port is set to the standard plaintext port of the protocol (where applicable), the struct will behave the same as if ssl_start_mode is set to sslExplicit. In all other cases, SSL negotiation will be implicit (sslImplicit). |
| 1 (sslImplicit) | The SSL negotiation will start immediately after the connection is established. |
| 2 (sslExplicit) | The struct will first connect in plaintext, and then will explicitly start SSL negotiation through a protocol command such as STARTTLS. |
| 3 (sslNone - default) | No SSL negotiation; no SSL security. All communication will be in plaintext mode. |

## Data Type

i32

# timeout property ([POP](#struct-ipworksedipop) Struct)

The timeout for the struct.

## Syntax

*Rust Syntax*

```text
fn timeout(&self ) -> Result<i32, IPWorksEDIError> fn set_timeout(&self, value : i32) ->  Option<IPWorksEDIError>
```

## Default Value

60

## Remarks

If the timeout property is set to 0, all operations will run uninterrupted until successful completion or an error condition is encountered.

If timeout is set to a positive value, the struct will wait for the operation to complete before returning control.

The struct will use [do_events](#do_events-method-pop-struct) to enter an efficient wait loop during any potential waiting period, making sure that all system events are processed immediately as they arrive. This ensures that the host application does not freeze and remains responsive.

If timeout expires, and the operation is not yet complete, the struct fails with an error.

NOTE: By default, all timeouts are *inactivity timeouts*, that is, the timeout period is extended by timeout seconds when any amount of data is successfully sent or received.

The default value for the timeout property is 60 seconds.

## Data Type

i32

# user property ([POP](#struct-ipworksedipop) Struct)

This property includes the user identifier for the mailbox.

## Syntax

*Rust Syntax*

```text
fn user(&self ) -> Result<String, IPWorksEDIError> fn set_user(&self, value : &str) ->  Option<IPWorksEDIError>
fn set_user_ref(&self, value : &String) ->  Option<IPWorksEDIError>
```

## Default Value

""

## Remarks

This property contains the user identifier for the mailbox. This property must be set before the struct connects to the [mail_server](#mail_server-property-pop-struct).

## Data Type

String

# config method ([POP](#struct-ipworksedipop) Struct)

Sets or retrieves a configuration setting.

## Syntax

*Rust Syntax*

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

## Remarks

config is a generic method available in every struct. It is used to set and retrieve [configuration settings](#config-settings-pop-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-pop-struct), you must call *Config("PROPERTY")*. The value will be returned as a string.

# connect method ([POP](#struct-ipworksedipop) Struct)

This method connects to the mail server and attempts to log in.

## Syntax

*Rust Syntax*

```text
fn connect(&self) -> Result<(), IPWorksEDIError>
```

## Remarks

This method connects to the mail server and attempts to log in using the current [user](#user-property-pop-struct) and [password](#password-property-pop-struct). Then it retrieves the initial statistics about the mailbox contents ([message_count](#message_count-property-pop-struct) and [query_total_size](#query_total_size-method-pop-struct)).

**Example. Connect to POP Mailbox:**

```text
POPControl.MailServer = "MyPOPServer"
POPControl.User = "username"
POPControl.Password = "password"
POPControl.Connect()

POPControl.MessageNumber = 1
POPControl.Retrieve()
MessageText = POPControl.MessageText
MessageHeaders = POPControl.MessageHeaders
```

# delete method ([POP](#struct-ipworksedipop) Struct)

This method deletes a message specified by MessageNumber on the server.

## Syntax

*Rust Syntax*

```text
fn delete(&self) -> Result<(), IPWorksEDIError>
```

## Remarks

This method asks the [mail_server](#mail_server-property-pop-struct) to delete the message specified by [message_number](#message_number-property-pop-struct). The message will not actually be deleted from the server until the connection is closed. To cancel a previous Delete, use the [reset](#reset-method-pop-struct) method.

# disconnect method ([POP](#struct-ipworksedipop) Struct)

This method disconnects from the mail server.

## Syntax

*Rust Syntax*

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

## Remarks

This method makes the struct disconnect from the [mail_server](#mail_server-property-pop-struct) by sending the *QUIT* command. If successful, all changes to the mailbox are committed by the server. Otherwise, changes are rolled back to the initial state that the server was in before the connection.

# do_events method ([POP](#struct-ipworksedipop) Struct)

This method processes events from the internal message queue.

## Syntax

*Rust Syntax*

```text
fn do_events(&self) -> Result<(), IPWorksEDIError>
```

## Remarks

When do_events is called, the struct processes any available events. If no events are available, it waits for a preset period of time, and then returns.

# interrupt method ([POP](#struct-ipworksedipop) Struct)

This method interrupts the current method.

## Syntax

*Rust Syntax*

```text
fn interrupt(&self) -> Result<(), IPWorksEDIError>
```

## Remarks

If there is no method in progress, interrupt simply returns, doing nothing.

# list_message_sizes method ([POP](#struct-ipworksedipop) Struct)

This method retrieves a list of all message sizes from the server.

## Syntax

*Rust Syntax*

```text
fn list_message_sizes(&self) -> Result<(), IPWorksEDIError>
```

## Remarks

This message retrieves a list of all message sizes from the server. For each message listed, a [on_message_list](#on_message_list-event-pop-struct) event will fire containing the number and size of the message.

# list_message_ui_ds method ([POP](#struct-ipworksedipop) Struct)

This method retrieves a list of all message UIDs from the server.

## Syntax

*Rust Syntax*

```text
fn list_message_ui_ds(&self) -> Result<(), IPWorksEDIError>
```

## Remarks

This method retrieves a list of all message UIDs from the server. For each message listed, a [on_message_list](#on_message_list-event-pop-struct) event will fire containing the number and UID of the message.

# localize_date method ([POP](#struct-ipworksedipop) Struct)

This method converts a valid RFC 822 message date to a local date and time.

## Syntax

*Rust Syntax*

```text
fn localize_date(&self, date_time : &str) ->  Result<String, IPWorksEDIError>
```

## Remarks

This method can be used to convert an RFC 822 date and time string to the corresponding local date and time.

NOTE: Dates will be returned in the format: "MM/dd/yyyy hh:mm:ss".

# query_message_size method ([POP](#struct-ipworksedipop) Struct)

This method returns the size in bytes of the current message.

## Syntax

*Rust Syntax*

```text
fn query_message_size(&self) ->  Result<i64, IPWorksEDIError>
```

## Remarks

This method queries the server for the size in bytes of the message specified by [message_number](#message_number-property-pop-struct). The method returns the size (in bytes) of the message.

If the struct is not connected, or [message_number](#message_number-property-pop-struct) does not contain a valid message number, the return value is *0*. Otherwise, it returns the size of the mail message (including headers) as reported by the server.

The [mail_server](#mail_server-property-pop-struct) is asked about the size of the message only if the [message_number](#message_number-property-pop-struct) property has changed. If [message_number](#message_number-property-pop-struct) has not changed, the struct returns a cached value.

# query_message_uid method ([POP](#struct-ipworksedipop) Struct)

This method returns the unique identifier (UID) of the message as specified by the server.

## Syntax

*Rust Syntax*

```text
fn query_message_uid(&self) ->  Result<String, IPWorksEDIError>
```

## Remarks

This method returns the unique identifier (UID) of the message specified by [message_number](#message_number-property-pop-struct). If the struct is not connected, or [message_number](#message_number-property-pop-struct) does not contain a valid message number, the return value of this method is an empty string. Otherwise, it returns the UID of the mail message as reported by the server.

The [mail_server](#mail_server-property-pop-struct) is asked about the UID of the message only if the [message_number](#message_number-property-pop-struct) property has changed. If [message_number](#message_number-property-pop-struct) has not changed, the struct returns a cached value.

# query_total_size method ([POP](#struct-ipworksedipop) Struct)

This method returns the cumulative size in bytes of messages in the mailbox (including headers).

## Syntax

*Rust Syntax*

```text
fn query_total_size(&self) ->  Result<i64, IPWorksEDIError>
```

## Remarks

This method returns the cumulative size in bytes of messages in the mailbox (including headers). When the struct is not connected to the server, the return value of this method is *0*. When connected, it returns the cumulative size of all the messages in the mail box as reported by the POP server.

# reset method ([POP](#struct-ipworksedipop) Struct)

This method will reset the struct.

## Syntax

*Rust Syntax*

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

## Remarks

This method will reset the struct's properties to their default values.

# reset_state method ([POP](#struct-ipworksedipop) Struct)

Resets all changes and reverts back to the state the struct was in when the user first connected.

## Syntax

*Rust Syntax*

```text
fn reset_state(&self) -> Result<(), IPWorksEDIError>
```

## Remarks

This method is used to reset all changes and revert the struct back to the state it was in when the user first connected.

# retrieve method ([POP](#struct-ipworksedipop) Struct)

This method retrieves a message specified by MessageNumber from the server.

## Syntax

*Rust Syntax*

```text
fn retrieve(&self) -> Result<(), IPWorksEDIError>
```

## Remarks

This method is used to retrieve a message specified by [message_number](#message_number-property-pop-struct) from the server. It asks the [mail_server](#mail_server-property-pop-struct) to retrieve the message specified by [message_number](#message_number-property-pop-struct). The message headers will arrive in the [on_header](#on_header-event-pop-struct) event, and the message text will arrive in the [on_transfer](#on_transfer-event-pop-struct) event.

The [max_lines](#max_lines-property-pop-struct) property defines the number of lines retrieved.

**Example. Connect and Retrieve Messages:**

```text
POPControl.MailServer = "MyPOPServer"
POPControl.User = "username"
POPControl.Password = "password"
POPControl.Connect()

POPControl.MessageNumber = 1
POPControl.Retrieve()
```

# retrieve_headers method ([POP](#struct-ipworksedipop) Struct)

This method retrieves headers for a message specified by MessageNumber .

## Syntax

*Rust Syntax*

```text
fn retrieve_headers(&self) -> Result<(), IPWorksEDIError>
```

## Remarks

Calling this method will retrieve the headers for the message specified by the [message_number](#message_number-property-pop-struct) property. The message headers will be provided by the [on_header](#on_header-event-pop-struct) event and also stored in the message_headers property.

**Example. Connect and Retrieve Message Headers:**

```text
POPControl.MailServer = "MyPOPServer"
POPControl.User = "username"
POPControl.Password = "password"
POPControl.Connect()

POPControl.MessageNumber = 1
POPControl.RetrieveHeaders()
```

# send_command method ([POP](#struct-ipworksedipop) Struct)

This method sends the exact command directly to the server.

## Syntax

*Rust Syntax*

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

## Remarks

This method sends the command specified by *command* to the server exactly as it is provided. Use this method to send additional or custom commands directly to the server.

After calling this method, check the [last_reply](#last_reply-property-pop-struct) property or monitor the [on_pi_trail](#on_pi_trail-event-pop-struct) event to obtain the server's response.

# on_connection_status event ([POP](#struct-ipworksedipop) Struct)

Fired to indicate changes in the connection state.

## Syntax

*Rust Syntax*

```text
// POPConnectionStatusEventArgs carries the POP ConnectionStatus event's parameters.
pub struct POPConnectionStatusEventArgs {
  fn connection_event(&self) -> &String
  fn status_code(&self) -> i32
  fn description(&self) -> &String
}

// POPConnectionStatusEvent defines the signature of the POP ConnectionStatus event's handler function.
pub trait POPConnectionStatusEvent {
  fn on_connection_status(&self, sender : POP, e : &mut POPConnectionStatusEventArgs);
}

impl <'a> POP<'a> {
  pub fn on_connection_status(&self) -> &'a dyn POPConnectionStatusEvent;
  pub fn set_on_connection_status(&mut self, value : &'a dyn POPConnectionStatusEvent);
  ...
}
```

## Remarks

This event is fired when the connection state changes: for example, completion of a firewall or proxy connection or completion of a security handshake.

The *connection_event* parameter indicates the type of connection event. Values may include the following:

|  |  |
| --- | --- |
|  | Firewall connection complete. |
|  | Secure Sockets Layer (SSL) or S/Shell handshake complete (where applicable). |
|  | Remote host connection complete. |
|  | Remote host disconnected. |
|  | SSL or S/Shell connection broken. |
|  | Firewall host disconnected. |

 *status_code* has the error code returned by the Transmission Control Protocol (TCP)/IP stack. *description* contains a description of this code. The value of *status_code* is equal to the value of the error.

# on_end_transfer event ([POP](#struct-ipworksedipop) Struct)

This event is fired when the message completes transferring.

## Syntax

*Rust Syntax*

```text
// POPEndTransferEventArgs carries the POP EndTransfer event's parameters.
pub struct POPEndTransferEventArgs {
  fn direction(&self) -> i32
}

// POPEndTransferEvent defines the signature of the POP EndTransfer event's handler function.
pub trait POPEndTransferEvent {
  fn on_end_transfer(&self, sender : POP, e : &mut POPEndTransferEventArgs);
}

impl <'a> POP<'a> {
  pub fn on_end_transfer(&self) -> &'a dyn POPEndTransferEvent;
  pub fn set_on_end_transfer(&mut self, value : &'a dyn POPEndTransferEvent);
  ...
}
```

## Remarks

The on_end_transfer event is fired when the message body completes transferring from the server to the local host.

The *Direction* parameter shows whether the client (0) or the server (1) is sending the data.

# on_error event ([POP](#struct-ipworksedipop) Struct)

Fired when information is available about errors during data delivery.

## Syntax

*Rust Syntax*

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

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

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

## Remarks

The on_error event is fired in case of exceptional conditions during message processing. Normally the struct fails with an error.

The *error_code* parameter contains an error code, and the *description* parameter contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the [Error Codes](#trappable-errors-pop-struct) section.

# on_header event ([POP](#struct-ipworksedipop) Struct)

This event is fired for every message header being retrieved.

## Syntax

*Rust Syntax*

```text
// POPHeaderEventArgs carries the POP Header event's parameters.
pub struct POPHeaderEventArgs {
  fn field(&self) -> &String
  fn value(&self) -> &String
}

// POPHeaderEvent defines the signature of the POP Header event's handler function.
pub trait POPHeaderEvent {
  fn on_header(&self, sender : POP, e : &mut POPHeaderEventArgs);
}

impl <'a> POP<'a> {
  pub fn on_header(&self) -> &'a dyn POPHeaderEvent;
  pub fn set_on_header(&mut self, value : &'a dyn POPHeaderEvent);
  ...
}
```

## Remarks

The *field* parameter contains the name of the header (in the same case as it is delivered). The *value* parameter contains the header contents.

If the header line being retrieved is a continuation header line, then the *field* parameter contains "" (empty string).

# on_launch_browser event ([POP](#struct-ipworksedipop) Struct)

Fires before launching a browser with the authorization URL.

## Syntax

*Rust Syntax*

```text
// POPLaunchBrowserEventArgs carries the POP LaunchBrowser event's parameters.
pub struct POPLaunchBrowserEventArgs {
  fn url(&self) -> &String
  fn set_url(&self, value : &str)
  fn set_url_ref(&self, value : &String)
  fn command(&self) -> &String
  fn set_command(&self, value : &str)
  fn set_command_ref(&self, value : &String)
}

// POPLaunchBrowserEvent defines the signature of the POP LaunchBrowser event's handler function.
pub trait POPLaunchBrowserEvent {
  fn on_launch_browser(&self, sender : POP, e : &mut POPLaunchBrowserEventArgs);
}

impl <'a> POP<'a> {
  pub fn on_launch_browser(&self) -> &'a dyn POPLaunchBrowserEvent;
  pub fn set_on_launch_browser(&mut self, value : &'a dyn POPLaunchBrowserEvent);
  ...
}
```

## Remarks

When the client_profile property is set to ocpApplication and get_authorization is called, the struct will fire this event with the *command*, which will be executed by the struct. The *url* parameter will be the authorization URL that the user will be directed to authenticate.

Within this event, you may override the current value of either *command* or *url* and provide your own value. If *command* is set to an empty string, the struct will not attempt to launch the browser and instead you will be responsible for directing the user to the authorization URL specified by the URL parameter. If *command* is not empty, the URL will be appended to the end.

In Windows, ShellExecute is used to execute *command*, which limits the verbs available for use in *command* to:

- edit
- explore
- find
- open
- print

# on_log event ([POP](#struct-ipworksedipop) Struct)

Fired once for each log message.

## Syntax

*Rust Syntax*

```text
// POPLogEventArgs carries the POP Log event's parameters.
pub struct POPLogEventArgs {
  fn log_level(&self) -> i32
  fn message(&self) -> &String
  fn log_type(&self) -> &String
}

// POPLogEvent defines the signature of the POP Log event's handler function.
pub trait POPLogEvent {
  fn on_log(&self, sender : POP, e : &mut POPLogEventArgs);
}

impl <'a> POP<'a> {
  pub fn on_log(&self) -> &'a dyn POPLogEvent;
  pub fn set_on_log(&mut self, value : &'a dyn POPLogEvent);
  ...
}
```

## Remarks

This event is fired once for each log message generated by the struct. The verbosity is controlled by the [LogLevel](#LogLevel) setting.

*log_level* indicates the level of message. Possible values are as follows:

|  |  |
| --- | --- |
| 0 (None) | No events are logged. |
| 1 (Info - default) | Informational events are logged. |
| 2 (Verbose) | Detailed data are logged. |
| 3 (Debug) | Debug data are logged. |

The value 1 (Info) logs basic information, including the URL, HTTP version, and status details.

The value 2 (Verbose) logs additional information about the request and response.

The value 3 (Debug) logs the headers and body for both the request and response, as well as additional debug information (if any).

*message* is the log entry.

*log_type* identifies the type of log entry. Possible values are as follows:

- "Info"
- "RequestHeaders"
- "ResponseHeaders"
- "RequestBody"
- "ResponseBody"
- "ProxyRequest"
- "ProxyResponse"
- "FirewallRequest"
- "FirewallResponse"

# on_message_list event ([POP](#struct-ipworksedipop) Struct)

This event is fired for every message listed by ListMessageSizes and/or ListMessageUIDs .

## Syntax

*Rust Syntax*

```text
// POPMessageListEventArgs carries the POP MessageList event's parameters.
pub struct POPMessageListEventArgs {
  fn message_number(&self) -> i32
  fn message_uid(&self) -> &String
  fn message_size(&self) -> i32
}

// POPMessageListEvent defines the signature of the POP MessageList event's handler function.
pub trait POPMessageListEvent {
  fn on_message_list(&self, sender : POP, e : &mut POPMessageListEventArgs);
}

impl <'a> POP<'a> {
  pub fn on_message_list(&self) -> &'a dyn POPMessageListEvent;
  pub fn set_on_message_list(&mut self, value : &'a dyn POPMessageListEvent);
  ...
}
```

## Remarks

When [list_message_sizes](#list_message_sizes-method-pop-struct) is called, *message_size* is valid, and *message_uid* is always an empty string.

When [list_message_ui_ds](#list_message_ui_ds-method-pop-struct) is called, *message_uid* is valid, and *message_size* is 0.

# on_pi_trail event ([POP](#struct-ipworksedipop) Struct)

This event traces the commands sent to the mail server, and the respective replies.

## Syntax

*Rust Syntax*

```text
// POPPITrailEventArgs carries the POP PITrail event's parameters.
pub struct POPPITrailEventArgs {
  fn direction(&self) -> i32
  fn message(&self) -> &String
}

// POPPITrailEvent defines the signature of the POP PITrail event's handler function.
pub trait POPPITrailEvent {
  fn on_pi_trail(&self, sender : POP, e : &mut POPPITrailEventArgs);
}

impl <'a> POP<'a> {
  pub fn on_pi_trail(&self) -> &'a dyn POPPITrailEvent;
  pub fn set_on_pi_trail(&mut self, value : &'a dyn POPPITrailEvent);
  ...
}
```

## Remarks

The on_pi_trail event is useful for debugging purposes. It shows all of the interaction between the client and the server, line by line, except for message header and body transfers.

The *message* parameter contains the full text of the message. The *direction* parameter shows the originator of the message:

|  |  |
| --- | --- |
| 0 (Client) | The message originates from the client. |
| 1 (Server) | The message originates from the server. |
| 2 (Info) | The message is an informative message originating from the client software (the struct code). |

# on_ssl_server_authentication event ([POP](#struct-ipworksedipop) Struct)

Fired after the server presents its certificate to the client.

## Syntax

*Rust Syntax*

```text
// POPSSLServerAuthenticationEventArgs carries the POP SSLServerAuthentication event's parameters.
pub struct POPSSLServerAuthenticationEventArgs {
  fn cert_encoded(&self) -> &[u8]
  fn cert_subject(&self) -> &String
  fn cert_issuer(&self) -> &String
  fn status(&self) -> &String
  fn accept(&self) -> bool
  fn set_accept(&self, value : bool)
}

// POPSSLServerAuthenticationEvent defines the signature of the POP SSLServerAuthentication event's handler function.
pub trait POPSSLServerAuthenticationEvent {
  fn on_ssl_server_authentication(&self, sender : POP, e : &mut POPSSLServerAuthenticationEventArgs);
}

impl <'a> POP<'a> {
  pub fn on_ssl_server_authentication(&self) -> &'a dyn POPSSLServerAuthenticationEvent;
  pub fn set_on_ssl_server_authentication(&mut self, value : &'a dyn POPSSLServerAuthenticationEvent);
  ...
}
```

## Remarks

During this event, the client can decide whether or not to continue with the connection process. The *accept* parameter is a recommendation on whether to continue or close the connection. This is just a suggestion: application software must use its own logic to determine whether or not to continue.

 When *accept* is False, *status* shows why the verification failed (otherwise, *status* contains the string *OK*). If it is decided to continue, you can override and accept the certificate by setting the *accept* parameter to True.

# on_ssl_status event ([POP](#struct-ipworksedipop) Struct)

Fired when secure connection progress messages are available.

## Syntax

*Rust Syntax*

```text
// POPSSLStatusEventArgs carries the POP SSLStatus event's parameters.
pub struct POPSSLStatusEventArgs {
  fn message(&self) -> &String
}

// POPSSLStatusEvent defines the signature of the POP SSLStatus event's handler function.
pub trait POPSSLStatusEvent {
  fn on_ssl_status(&self, sender : POP, e : &mut POPSSLStatusEventArgs);
}

impl <'a> POP<'a> {
  pub fn on_ssl_status(&self) -> &'a dyn POPSSLStatusEvent;
  pub fn set_on_ssl_status(&mut self, value : &'a dyn POPSSLStatusEvent);
  ...
}
```

## Remarks

The event is fired for informational and logging purposes only. This event tracks the progress of the connection.

# on_start_transfer event ([POP](#struct-ipworksedipop) Struct)

This event is fired when the message starts transferring.

## Syntax

*Rust Syntax*

```text
// POPStartTransferEventArgs carries the POP StartTransfer event's parameters.
pub struct POPStartTransferEventArgs {
  fn direction(&self) -> i32
}

// POPStartTransferEvent defines the signature of the POP StartTransfer event's handler function.
pub trait POPStartTransferEvent {
  fn on_start_transfer(&self, sender : POP, e : &mut POPStartTransferEventArgs);
}

impl <'a> POP<'a> {
  pub fn on_start_transfer(&self) -> &'a dyn POPStartTransferEvent;
  pub fn set_on_start_transfer(&mut self, value : &'a dyn POPStartTransferEvent);
  ...
}
```

## Remarks

The on_start_transfer event is fired when the message body starts transferring from the server to the local host.

The *Direction* parameter shows whether the client (0) or the server (1) is sending the data.

# on_transfer event ([POP](#struct-ipworksedipop) Struct)

This event is fired when the message is transferred from MailServer .

## Syntax

*Rust Syntax*

```text
// POPTransferEventArgs carries the POP Transfer event's parameters.
pub struct POPTransferEventArgs {
  fn direction(&self) -> i32
  fn bytes_transferred(&self) -> i64
  fn percent_done(&self) -> i32
  fn text(&self) -> &[u8]
  fn eol(&self) -> bool
}

// POPTransferEvent defines the signature of the POP Transfer event's handler function.
pub trait POPTransferEvent {
  fn on_transfer(&self, sender : POP, e : &mut POPTransferEventArgs);
}

impl <'a> POP<'a> {
  pub fn on_transfer(&self) -> &'a dyn POPTransferEvent;
  pub fn set_on_transfer(&mut self, value : &'a dyn POPTransferEvent);
  ...
}
```

## Remarks

The *text* parameter contains the portion of the message data to be retrieved.

The *bytes_transferred* parameter contains the number of bytes transferred since the beginning of the message, including header bytes. At the end of transmission (i.e., when the last on_transfer event is fired), *bytes_transferred* equals the value of the [query_message_size](#query_message_size-method-pop-struct) method.

The on_transfer event is fired for every line of the message. For complete lines, there is no terminating newline at the end of the *text* parameter, and *eol* is True. The *eol* parameter is False when a line is broken (usually for being too long).

A faster way to retrieve a message is to assign a value to the [local_file](#local_file-property-pop-struct) property and use the on_transfer event to check the progress rather than to get the actual data.

The *Direction* parameter shows whether the client (0) or the server (1) is sending the data.

The *PercentDone* parameter shows the progress of the transfer in the corresponding direction. If *PercentDone* can not be calculated the value will be -1.

NOTE: Events are not re-entrant. Performing time-consuming operations within this event will prevent it from firing again in a timely manner and may affect overall performance.

NOTE: For the *percent_done* parameter value to be correct, the [GetMessageSize](#GetMessageSize) configuration setting must be set to True.

# Config Settings ([POP](#struct-ipworksedipop) 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-pop-struct) method.

### POP Config Settings

**AuthorizationIdentity**: The value to use as the authorization identity when SASL authentication is used. When [auth_mechanism](#auth_mechanism-property-pop-struct) is set to amSASLPlain or amSASLDigestMD5, this configuration setting may specify an authorization identity to be used when authenticating.

**AutoDecodeSubject**: Instructs the struct to automatically decode message subjects.Subjects that have been Quoted-Printable or Base64 encoded are automatically decoded when this configuration setting is True (default). Only subjects in the format "=?iso-8859-1?Q?data?=" will be correctly decoded.

**GetMessageSize**: Whether to poll the server for the message size prior to retrieving it.By default, this value is False. When set to True, the struct will retrieve the message size from the server before downloading it and the *PercentDone* parameter of the [on_transfer](#on_transfer-event-pop-struct) event will be populated. When this value is False (default), the *PercentDone* parameter of the [on_transfer](#on_transfer-event-pop-struct) event will not be updated and will evaluate to -1.

**MaxLineLength**: The maximum expected length for message lines.Normally, internet mail message lines are up to 80 bytes long; however, different mail systems might use other values. Change the value of this property if you are expecting longer lines.

### TCPClient Config Settings

**ConnectionTimeout**: Sets a separate timeout value for establishing a connection.When set, this configuration setting allows you to specify a different timeout value for establishing a connection. Otherwise, the struct will use [timeout](#timeout-property-pop-struct) for establishing a connection and transmitting/receiving data.

**EnableFallback**: Whether to try the other addresses the remote host resolves to when a connection attempt fails.When set to True and remote_host resolves to more than one address, the struct will try the remaining addresses in turn if the connection to the first one fails, and only fails with an error once every address has been tried. The error reported is the one from the last attempt. Use [FallbackTimeout](#FallbackTimeout) to limit the total time spent.

NOTE: Only addresses of the same IP version as the first one are tried, this setting does not fall back from IPv6 to IPv4. Selecting between IPv6 and IPv4 is done by [UseIPv6](#UseIPv6) when the host is resolved.

This setting must be set before the connection is established. The default value for this setting is False.

**FallbackTimeout**: The maximum time in milliseconds to spend on connection attempts when EnableFallback is enabled.This setting limits the total time that the struct will spend on all of the connection attempts made when [EnableFallback](#EnableFallback) is enabled. The default value is 0, in which case each attempt uses the operating system's own connection timeout.

NOTE: This setting only applies when [EnableFallback](#EnableFallback) is True. It is unrelated to [ConnectionTimeout](#ConnectionTimeout), which is specified in seconds and applies to the [connected](#connected-property-pop-struct) operation as a whole.

**FirewallAutoDetect**: Tells the struct whether or not to automatically detect and use firewall system settings, if available.This configuration setting is provided for use by structs that do not directly expose Firewall properties.

**FirewallHost**: Name or IP address of firewall (optional).If a [FirewallHost](#FirewallHost) is given, requested connections will be authenticated through the specified firewall when connecting.

If the [FirewallHost](#FirewallHost) setting is set to a Domain Name, a DNS request is initiated. Upon successful termination of the request, the [FirewallHost](#FirewallHost) setting is set to the corresponding address. If the search is not successful, an error is returned.

NOTE: This setting is provided for use by structs that do not directly expose Firewall properties.

**FirewallHTTPVersion**: The HTTP version to be used when connecting through a tunneling proxy.When [FirewallType](#FirewallType) is set to a tunneling proxy, this setting dictates which HTTP version is used when connecting.

**FirewallPassword**: Password to be used if authentication is to be used when connecting through the firewall.If [FirewallHost](#FirewallHost) is specified, the [FirewallUser](#FirewallUser) and [FirewallPassword](#FirewallPassword) settings are used to connect and authenticate to the given firewall. If the authentication fails, the struct fails with an error.

NOTE: This setting is provided for use by structs that do not directly expose Firewall properties.

**FirewallPort**: The TCP port for the FirewallHost;.The [FirewallPort](#FirewallPort) is set automatically when [FirewallType](#FirewallType) is set to a valid value.

NOTE: This configuration setting is provided for use by structs that do not directly expose Firewall properties.

**FirewallType**: Determines the type of firewall to connect through.Possible values are as follows:

|  |  |
| --- | --- |
| 0 | No firewall (default setting). |
| 1 | Connect through a tunneling proxy. [FirewallPort](#FirewallPort) is set to 80. |
| 2 | Connect through a SOCKS4 Proxy. [FirewallPort](#FirewallPort) is set to 1080. |
| 3 | Connect through a SOCKS5 Proxy. [FirewallPort](#FirewallPort) is set to 1080. |
| 10 | Connect through a SOCKS4A Proxy. [FirewallPort](#FirewallPort) is set to 1080. |

NOTE: This setting is provided for use by structs that do not directly expose Firewall properties.

**FirewallUser**: A user name if authentication is to be used connecting through a firewall.If the [FirewallHost](#FirewallHost) is specified, the [FirewallUser](#FirewallUser) and [FirewallPassword](#FirewallPassword) settings are used to connect and authenticate to the Firewall. If the authentication fails, the struct fails with an error.

NOTE: This setting is provided for use by structs that do not directly expose Firewall properties.

**KeepAliveInterval**: The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received.When set, [TCPKeepAlive](#TCPKeepAlive) will automatically be set to True. A TCP keep-alive packet will be sent after a period of inactivity as defined by [KeepAliveTime](#KeepAliveTime). If no acknowledgment is received from the remote host, the keep-alive packet will be sent again. This configuration setting specifies the interval at which the successive keep-alive packets are sent in milliseconds. This system default if this value is not specified here is 1 second.

NOTE: This value is not applicable in macOS.

**KeepAliveTime**: The inactivity time in milliseconds before a TCP keep-alive packet is sent.When set, [TCPKeepAlive](#TCPKeepAlive) will automatically be set to True. By default, the operating system will determine the time a connection is idle before a Transmission Control Protocol (TCP) keep-alive packet is sent. This system default if this value is not specified here is 2 hours. In many cases, a shorter interval is more useful. Set this value to the desired interval in milliseconds.

**Linger**: When set to True, connections are terminated gracefully.This property controls how a connection is closed. The default is True.

In the case that Linger is True (default), two scenarios determine how long the connection will linger. In the first, if [LingerTime](#LingerTime) is 0 (default), the system will attempt to send pending data for a connection until the default IP timeout expires.

In the second scenario, if [LingerTime](#LingerTime) is a positive value, the system will attempt to send pending data until the specified [LingerTime](#LingerTime) is reached. If this attempt fails, then the system will reset the connection.

The default behavior (which is also the default mode for stream sockets) might result in a long delay in closing the connection. Although the struct returns control immediately, the system could hold system resources until all pending data are sent (even after your application closes).

Setting this property to False forces an immediate disconnection. If you know that the other side has received all the data you sent (e.g., by a client acknowledgment), setting this property to False might be the appropriate course of action.

**LingerTime**: Time in seconds to have the connection linger. LingerTime is the time, in seconds, the socket connection will linger. This value is 0 by default, which means it will use the default IP timeout.

**LocalHost**: The name of the local host through which connections are initiated or accepted. The [local_host](#local_host-property-pop-struct) setting contains the name of the local host as obtained by the *gethostname()* system call, or if the user has assigned an IP address, the value of that address.

In multihomed hosts (machines with more than one IP interface), setting LocalHost to the value of an interface will make the struct initiate connections (or accept in the case of server structs) only through that interface.

If the struct is connected, the [local_host](#local_host-property-pop-struct) setting shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multihomed hosts (machines with more than one IP interface).

**LocalPort**: The port in the local host where the struct binds. This configuration setting must be set before a connection is attempted. It instructs the struct to bind to a specific port (or communication endpoint) in the local machine.

Setting this to 0 (default) enables the system to choose a port at random. The chosen port will be shown by local_port after the connection is established.

local_port cannot be changed once a connection is made. Any attempt to set this when a connection is active will generate an error.

This configuration setting is useful when trying to connect to services that require a trusted port on the client side. An example is the remote shell (rsh) service in UNIX systems.

**MaxLineLength**: The maximum amount of data to accumulate when no EOL is found.[MaxLineLength](#MaxLineLength) is the size of an internal buffer, which holds received data while waiting for an eol string.

If an eol string is found in the input stream before [MaxLineLength](#MaxLineLength) bytes are received, the on_data_in event is fired with the *EOL* parameter set to True, and the buffer is reset.

If no eol is found, and [MaxLineLength](#MaxLineLength) bytes are accumulated in the buffer, the on_data_in event is fired with the *EOL* parameter set to False, and the buffer is reset.

The minimum value for [MaxLineLength](#MaxLineLength) is 256 bytes. The default value is 2048 bytes.

**MaxTransferRate**: The transfer rate limit in bytes per second.This configuration setting can be used to throttle outbound TCP traffic. Set this to the number of bytes to be sent per second. By default, this is not set and there is no limit.

**ProxyExceptionsList**: A semicolon separated list of hosts and IPs to bypass when using a proxy.This configuration setting optionally specifies a semicolon-separated list of hostnames or IP addresses to bypass when a proxy is in use. When requests are made to hosts specified in this property, the proxy will not be used. For instance:

*www.google.com;www.example.com*

**TCPKeepAlive**: Determines whether or not the keep alive socket option is enabled.If set to True, the socket's keep-alive option is enabled and keep-alive packets will be sent periodically to maintain the connection. Set [KeepAliveTime](#KeepAliveTime) and [KeepAliveInterval](#KeepAliveInterval) to configure the timing of the keep-alive packets.

NOTE: This value is not applicable in Java.

**TcpNoDelay**: Whether or not to delay when sending packets. When set to True, the socket will send all data that are ready to send at once. When set to False, the socket will send smaller buffered packets of data at small intervals. This is known as the Nagle algorithm.

By default, this configuration setting is set to False.

**UseIPv6**: Whether to use IPv6.When set to *0* (default), the struct will use IPv4 exclusively. When set to *1*, the struct will use IPv6 exclusively. To instruct the struct to prefer IPv6 addresses, but use IPv4 if IPv6 is not supported on the system, this setting should be set to *2*. The default value is *0*. Possible values are as follows:

|  |  |
| --- | --- |
| 0 | IPv4 only |
| 1 | IPv6 only |
| 2 | IPv6 with IPv4 fallback |

**UseNTLMv2**: Whether to use NTLM V2.When authenticating with NTLM, this setting specifies whether NTLM V2 is used. By default this value is True and NTLM V2 will be used. Set this to False to use NTLM V1.

### SSL Config Settings

**LogSSLPackets**: Controls whether SSL packets are logged when using the internal security API.When [ssl_provider](#ssl_provider-property-pop-struct) is set to *Internal*, this configuration setting controls whether Secure Sockets Layer (SSL) packets should be logged. By default, this configuration setting is *False*, as it is useful only for debugging purposes.

When enabled, SSL packet logs are output using the [on_ssl_status](#on_ssl_status-event-pop-struct) event, which will fire each time an SSL packet is sent or received.

Enabling this configuration setting has no effect if [ssl_provider](#ssl_provider-property-pop-struct) is set to *Platform*.

**OpenSSLCADir**: The path to a directory containing CA certificates.This functionality is available only when the provider is OpenSSL.

The path set by this property should point to a directory containing CA certificates in PEM format. The files each contain one CA certificate. The files are looked up by the CA subject name hash value, which must hence be available. If more than one CA certificate with the same name hash value exist, the extension must be different (e.g., 9d66eef0.0, 9d66eef0.1). OpenSSL recommends the use of the c_rehash utility to create the necessary links. Please refer to the OpenSSL man page SSL_CTX_load_verify_locations(3) for details.

**OpenSSLCAFile**: Name of the file containing the list of CA's trusted by your application.This functionality is available only when the provider is OpenSSL.

The file set by this property should contain a list of CA certificates in PEM format. The file can contain several CA certificates identified by the following sequences:

 -----BEGIN CERTIFICATE-----

 ... (CA certificate in base64 encoding) ...

 -----END CERTIFICATE-----

 Before, between, and after the certificate text is allowed, which can be used, for example, for descriptions of the certificates. Refer to the OpenSSL man page SSL_CTX_load_verify_locations(3) for details.

**OpenSSLCipherList**: A string that controls the ciphers to be used by SSL.This functionality is available only when the provider is OpenSSL.

The format of this string is described in the OpenSSL man page ciphers(1) section "CIPHER LIST FORMAT". Please refer to it for details. The default string "DEFAULT" is determined at compile time and is normally equivalent to "ALL:!ADH:RC4+RSA:+SSLv2:@STRENGTH".

**OpenSSLPrngSeedData**: The data to seed the pseudo random number generator (PRNG).This functionality is available only when the provider is OpenSSL.

By default, OpenSSL uses the device file "/dev/urandom" to seed the PRNG, and setting OpenSSLPrngSeedData is not required. If set, the string specified is used to seed the PRNG.

**ReuseSSLSession**: Determines if the SSL session is reused.

If set to True, the struct will reuse the context if and only if the following criteria are met:

- The target host name is the same.
- The system cache entry has not expired (default timeout is 10 hours).
- The application process that calls the function is the same.
- The logon session is the same.
- The instance of the struct is the same.

**SSLCACerts**: A newline separated list of CA certificates to be included when performing an SSL handshake.When [ssl_provider](#ssl_provider-property-pop-struct) is set to *Internal*, this configuration setting specifies one or more CA certificates to be included with the ssl_cert property. Some servers or clients require the entire chain, including CA certificates, to be presented when performing SSL authentication. The value of this configuration setting is a newline-separated (CR/LF) list of certificates. For instance:

```text
-----BEGIN CERTIFICATE-----
MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw
... Intermediate Cert ...
eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w
F0I1XhM+pKj7FjDr+XNj
-----END CERTIFICATE-----
\r \n
-----BEGIN CERTIFICATE-----
MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp
... Root Cert ...
d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA
-----END CERTIFICATE-----
```

**SSLCheckCRL**: Whether to check the Certificate Revocation List for the server certificate.This configuration setting specifies whether the struct will check the Certificate Revocation List (CRL) specified by the server certificate. If set to 1 or 2, the struct will first obtain the list of CRL URLs from the server certificate's CRL distribution points extension. The struct will then make HTTP requests to each CRL endpoint to check the validity of the server's certificate. If the certificate has been revoked or any other issues are found during validation the struct fails with an error.

When set to 0 (default), the CRL check will not be performed by the struct. When set to 1, it will attempt to perform the CRL check, but it will continue without an error if the server's certificate does not support CRL. When set to 2, it will perform the CRL check and will throw an error if CRL is not supported.

This configuration setting is supported only in the Java, C#, and C++ editions. In the C++ edition, it is supported only on Windows operating systems.

**SSLCheckOCSP**: Whether to use OCSP to check the status of the server certificate.This configuration setting specifies whether the struct will use OCSP to check the validity of the server certificate. If set to 1 or 2, the struct will first obtain the Online Certificate Status Protocol (OCSP) URL from the server certificate's OCSP extension. The struct will then locate the issuing certificate and make an HTTP request to the OCSP endpoint to check the validity of the server's certificate. If the certificate has been revoked or any other issues are found during validation, the struct fails with an error.

When set to 0 (default), the struct will not perform an OCSP check. When set to 1, it will attempt to perform the OCSP check, but it will continue without an error if the server's certificate does not support OCSP. When set to 2, it will perform the OCSP check and will throw an error if OCSP is not supported.

This configuration setting is supported only in the Java, C#, and C++ editions. In the C++ edition, it is supported only on Windows operating systems.

**SSLCipherStrength**: The minimum cipher strength used for bulk encryption. This minimum cipher strength is largely dependent on the security modules installed on the system. If the cipher strength specified is not supported, an error will be returned when connections are initiated.

NOTE: This configuration setting contains the minimum cipher strength requested from the security library. The actual cipher strength used for the connection is shown by the [on_ssl_status](#on_ssl_status-event-pop-struct) event.

Use this configuration setting with caution. Requesting a lower cipher strength than necessary could potentially cause serious security vulnerabilities in your application.

When the provider is OpenSSL, [SSLCipherStrength](#SSLCipherStrength) is currently not supported. This functionality is instead made available through the [OpenSSLCipherList](#OpenSSLCipherList) configuration setting.

**SSLClientCACerts**: A newline separated list of CA certificates to use during SSL client certificate validation.This configuration setting is only applicable to server components (e.g., TCPServer) see [SSLServerCACerts](#SSLServerCACerts) for client components (e.g., TCPClient). This setting can be used to optionally specify one or more CA certificates to be used when verifying the client certificate that is presented by the client during the SSL handshake when ssl_authenticate_clients is enabled. When verifying the client's certificate, the certificates trusted by the system will be used as part of the verification process. If the client's CA certificates are not installed to the trusted system store, they may be specified here so they are included when performing the verification process. This configuration setting should be set only if the client's CA certificates are not already trusted on the system and cannot be installed to the trusted system store.

The value of this configuration setting is a newline-separated (CR/LF) list of certificates. For instance:

```text
-----BEGIN CERTIFICATE-----
MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw
... Intermediate Cert ...
eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w
F0I1XhM+pKj7FjDr+XNj
-----END CERTIFICATE-----
\r \n
-----BEGIN CERTIFICATE-----
MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp
... Root Cert ...
d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA
-----END CERTIFICATE-----
```

**SSLEnabledCipherSuites**: The cipher suite to be used in an SSL negotiation.This configuration setting enables the cipher suites to be used in SSL negotiation.

By default, the enabled cipher suites will include all available ciphers ("*").

The special value "*" means that the struct will pick all of the supported cipher suites. If [SSLEnabledCipherSuites](#SSLEnabledCipherSuites) is set to any other value, only the specified cipher suites will be considered.

Multiple cipher suites are separated by semicolons.

Example values when [ssl_provider](#ssl_provider-property-pop-struct) is set to *Platform* include the following:

```text
obj.config("SSLEnabledCipherSuites=*");
obj.config("SSLEnabledCipherSuites=CALG_AES_256");
obj.config("SSLEnabledCipherSuites=CALG_AES_256;CALG_3DES");
```

 Possible values when [ssl_provider](#ssl_provider-property-pop-struct) is set to *Platform* include the following:

- CALG_3DES
- CALG_3DES_112
- CALG_AES
- CALG_AES_128
- CALG_AES_192
- CALG_AES_256
- CALG_AGREEDKEY_ANY
- CALG_CYLINK_MEK
- CALG_DES
- CALG_DESX
- CALG_DH_EPHEM
- CALG_DH_SF
- CALG_DSS_SIGN
- CALG_ECDH
- CALG_ECDH_EPHEM
- CALG_ECDSA
- CALG_ECMQV
- CALG_HASH_REPLACE_OWF
- CALG_HUGHES_MD5
- CALG_HMAC
- CALG_KEA_KEYX
- CALG_MAC
- CALG_MD2
- CALG_MD4
- CALG_MD5
- CALG_NO_SIGN
- CALG_OID_INFO_CNG_ONLY
- CALG_OID_INFO_PARAMETERS
- CALG_PCT1_MASTER
- CALG_RC2
- CALG_RC4
- CALG_RC5
- CALG_RSA_KEYX
- CALG_RSA_SIGN
- CALG_SCHANNEL_ENC_KEY
- CALG_SCHANNEL_MAC_KEY
- CALG_SCHANNEL_MASTER_HASH
- CALG_SEAL
- CALG_SHA
- CALG_SHA1
- CALG_SHA_256
- CALG_SHA_384
- CALG_SHA_512
- CALG_SKIPJACK
- CALG_SSL2_MASTER
- CALG_SSL3_MASTER
- CALG_SSL3_SHAMD5
- CALG_TEK
- CALG_TLS1_MASTER
- CALG_TLS1PRF

 Example values when [ssl_provider](#ssl_provider-property-pop-struct) is set to *Internal*include the following:

```text
obj.config("SSLEnabledCipherSuites=*");
obj.config("SSLEnabledCipherSuites=TLS_DHE_DSS_WITH_AES_128_CBC_SHA");
obj.config("SSLEnabledCipherSuites=TLS_DHE_DSS_WITH_AES_128_CBC_SHA;TLS_ECDH_RSA_WITH_AES_128_CBC_SHA");
```

 Possible values when [ssl_provider](#ssl_provider-property-pop-struct) is set to *Internal* include the following:

- TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
- TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
- TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
- TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
- TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384
- TLS_RSA_WITH_AES_256_GCM_SHA384
- TLS_RSA_WITH_AES_128_GCM_SHA256
- TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256
- TLS_DHE_DSS_WITH_AES_256_GCM_SHA384
- TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
- TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384
- TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256
- TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
- TLS_DHE_DSS_WITH_AES_128_GCM_SHA256
- TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
- TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
- TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384
- TLS_DHE_DSS_WITH_AES_256_CBC_SHA256
- TLS_RSA_WITH_AES_256_CBC_SHA256
- TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
- TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384
- TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
- TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
- TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
- TLS_RSA_WITH_AES_128_CBC_SHA256
- TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256
- TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256
- TLS_DHE_DSS_WITH_AES_128_CBC_SHA256
- TLS_RSA_WITH_AES_256_CBC_SHA
- TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
- TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
- TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA
- TLS_DHE_RSA_WITH_AES_256_CBC_SHA
- TLS_ECDH_RSA_WITH_AES_256_CBC_SHA
- TLS_DHE_DSS_WITH_AES_256_CBC_SHA
- TLS_RSA_WITH_AES_128_CBC_SHA
- TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
- TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
- TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA
- TLS_ECDH_RSA_WITH_AES_128_CBC_SHA
- TLS_DHE_RSA_WITH_AES_128_CBC_SHA
- TLS_DHE_DSS_WITH_AES_128_CBC_SHA
- TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA
- TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
- TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA
- TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA
- TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA
- TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA
- TLS_RSA_WITH_3DES_EDE_CBC_SHA
- TLS_RSA_WITH_DES_CBC_SHA
- TLS_DHE_RSA_WITH_DES_CBC_SHA
- TLS_DHE_DSS_WITH_DES_CBC_SHA
- TLS_RSA_WITH_RC4_128_MD5
- TLS_RSA_WITH_RC4_128_SHA

When TLS 1.3 is negotiated (see [SSLEnabledProtocols](#SSLEnabledProtocols)), only the following cipher suites are supported:

- TLS_AES_256_GCM_SHA384
- TLS_CHACHA20_POLY1305_SHA256
- TLS_AES_128_GCM_SHA256

[SSLEnabledCipherSuites](#SSLEnabledCipherSuites) is used together with [SSLCipherStrength](#SSLCipherStrength).

**SSLEnabledProtocols**: Used to enable/disable the supported security protocols.This configuration setting is used to enable or disable the supported security protocols.

Not all supported protocols are enabled by default. The default value is *4032* for client components, and *3072* for server components. To specify a combination of enabled protocol versions set this config to the binary *OR* of one or more of the following values:

|  |  |
| --- | --- |
| TLS1.3 | 12288 (Hex 3000) |
| TLS1.2 | 3072 (Hex C00) (Default - Client and Server) |
| TLS1.1 | 768 (Hex 300) (Default - Client) |
| TLS1 | 192 (Hex C0) (Default - Client) |
| SSL3 | 48 (Hex 30) |
| SSL2 | 12 (Hex 0C) |

Note that only TLS 1.2 is enabled for server components that accept incoming connections. This adheres to industry standards to ensure a secure connection. Client components enable TLS 1.0, TLS 1.1, and TLS 1.2 by default and will negotiate the highest mutually supported version when connecting to a server, which should be TLS 1.2 in most cases.

**SSLEnabledProtocols: Transport Layer Security (TLS) 1.3 Notes:**

By default when TLS 1.3 is enabled, the struct will first try to use the platform TLS 1.3 implementation when the [ssl_provider](#ssl_provider-property-pop-struct) is set to Automatic for all editions. If the platform TLS 1.3 implementation is not available, the internal implementation will be used.

In editions that are designed to run on Windows, [ssl_provider](#ssl_provider-property-pop-struct) can be set to Platform to use the platform implementation instead of the internal implementation. When configured in this manner, please note that the platform provider is supported only on Windows 11/Windows Server 2022 and up. The default internal provider is available on all platforms and is not restricted to any specific OS version.

If set to *1* (Platform provider), please be aware of the following notes:

- The platform provider is available only on Windows 11/Windows Server 2022 and up.
- [SSLEnabledCipherSuites](#SSLEnabledCipherSuites) and other similar SSL configuration settings are not supported.
- If [SSLEnabledProtocols](#SSLEnabledProtocols) includes both TLS 1.3 and TLS 1.2, these restrictions are still applicable even if TLS 1.2 is negotiated. Enabling TLS 1.3 with the platform provider changes the implementation used for all TLS versions.

**SSLEnabledProtocols: SSL2 and SSL3 Notes: **

SSL 2.0 and 3.0 are not supported by the struct when the [ssl_provider](#ssl_provider-property-pop-struct) is set to internal. To use SSL 2.0 or SSL 3.0, the platform security API must have the protocols enabled and [ssl_provider](#ssl_provider-property-pop-struct) needs to be set to platform.

**SSLEnableRenegotiation**: Whether the renegotiation_info SSL extension is supported.This configuration setting specifies whether the renegotiation_info SSL extension will be used in the request when using the internal security API. This configuration setting is *false* by default, but it can be set to *true* to enable the extension.

This configuration setting is applicable only when [ssl_provider](#ssl_provider-property-pop-struct) is set to *Internal*.

**SSLIncludeCertChain**: Whether the entire certificate chain is included in the SSLServerAuthentication event.This configuration setting specifies whether the Encoded parameter of the [on_ssl_server_authentication](#on_ssl_server_authentication-event-pop-struct) event contains the full certificate chain. By default this value is False and only the leaf certificate will be present in the Encoded parameter of the [on_ssl_server_authentication](#on_ssl_server_authentication-event-pop-struct) event.

If set to True, all certificates returned by the server will be present in the Encoded parameter of the [on_ssl_server_authentication](#on_ssl_server_authentication-event-pop-struct) event. This includes the leaf certificate, any intermediate certificate, and the root certificate.

**SSLKeyLogFile**: The location of a file where per-session secrets are written for debugging purposes.This configuration setting optionally specifies the full path to a file on disk where per-session secrets are stored for debugging purposes.

When set, the struct will save the session secrets in the same format as the SSLKEYLOGFILE environment variable functionality used by most major browsers and tools, such as Chrome, Firefox, and cURL. This file can then be used in tools such as Wireshark to decrypt TLS traffic for debugging purposes. When writing to this file, the struct will only append, it will not overwrite previous values.

NOTE: This configuration setting is applicable only when [ssl_provider](#ssl_provider-property-pop-struct) is set to *Internal*.

**SSLNegotiatedCipher**: Returns the negotiated cipher suite.This configuration setting returns the cipher suite negotiated during the SSL handshake.

NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:

```csharp
server.Config("SSLNegotiatedCipher[connId]");
```

**SSLNegotiatedCipherStrength**: Returns the negotiated cipher suite strength.This configuration setting returns the strength of the cipher suite negotiated during the SSL handshake.

NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:

```csharp
server.Config("SSLNegotiatedCipherStrength[connId]");
```

**SSLNegotiatedCipherSuite**: Returns the negotiated cipher suite.This configuration setting returns the cipher suite negotiated during the SSL handshake represented as a single string.

NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:

```csharp
server.Config("SSLNegotiatedCipherSuite[connId]");
```

**SSLNegotiatedKeyExchange**: Returns the negotiated key exchange algorithm.This configuration setting returns the key exchange algorithm negotiated during the SSL handshake.

NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:

```csharp
server.Config("SSLNegotiatedKeyExchange[connId]");
```

**SSLNegotiatedKeyExchangeStrength**: Returns the negotiated key exchange algorithm strength.This configuration setting returns the strength of the key exchange algorithm negotiated during the SSL handshake.

NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:

```csharp
server.Config("SSLNegotiatedKeyExchangeStrength[connId]");
```

**SSLNegotiatedVersion**: Returns the negotiated protocol version.This configuration setting returns the protocol version negotiated during the SSL handshake.

NOTE: For server components (e.g., TCPServer), this is a per-connection configuration setting accessed by passing the ConnectionId. For example:

```csharp
server.Config("SSLNegotiatedVersion[connId]");
```

**SSLSecurityFlags**: Flags that control certificate verification.The following flags are defined (specified in hexadecimal notation). They can be ORed together to exclude multiple conditions:

|  |  |
| --- | --- |
| 0x00000001 | Ignore time validity status of certificate. |
| 0x00000002 | Ignore time validity status of CTL. |
| 0x00000004 | Ignore non-nested certificate times. |
| 0x00000010 | Allow unknown certificate authority. |
| 0x00000020 | Ignore wrong certificate usage. |
| 0x00000100 | Ignore unknown certificate revocation status. |
| 0x00000200 | Ignore unknown CTL signer revocation status. |
| 0x00000400 | Ignore unknown certificate authority revocation status. |
| 0x00000800 | Ignore unknown root revocation status. |
| 0x00008000 | Allow test root certificate. |
| 0x00004000 | Trust test root certificate. |
| 0x80000000 | Ignore non-matching CN (certificate CN non-matching server name). |

This functionality is currently not available when the provider is OpenSSL.

**SSLServerCACerts**: A newline separated list of CA certificates to use during SSL server certificate validation.This configuration setting is only used by client components (e.g., TCPClient) see [SSLClientCACerts](#SSLClientCACerts) for server components (e.g., TCPServer). This configuration setting can be used to optionally specify one or more CA certificates to be used when connecting to the server and verifying the server certificate. When verifying the server's certificate, the certificates trusted by the system will be used as part of the verification process. If the server's CA certificates are not installed to the trusted system store, they may be specified here so they are included when performing the verification process. This configuration setting should be set only if the server's CA certificates are not already trusted on the system and cannot be installed to the trusted system store.

The value of this configuration setting is a newline-separated (CR/LF) list of certificates. For instance:

```text
-----BEGIN CERTIFICATE-----
MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw
... Intermediate Cert...
eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w
F0I1XhM+pKj7FjDr+XNj
-----END CERTIFICATE-----
\r \n
-----BEGIN CERTIFICATE-----
MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp
... Root Cert...
d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA
-----END CERTIFICATE-----
```

**TLS12SignatureAlgorithms**: Defines the allowed TLS 1.2 signature algorithms when SSLProvider is set to Internal.This configuration setting specifies the allowed server certificate signature algorithms when [ssl_provider](#ssl_provider-property-pop-struct) is set to *Internal* and [SSLEnabledProtocols](#SSLEnabledProtocols) is set to allow TLS 1.2.

When specified the struct will verify that the server certificate signature algorithm is among the values specified in this configuration setting. If the server certificate signature algorithm is unsupported, the struct fails with an error.

The format of this value is a comma-separated list of hash-signature combinations. For instance:

```csharp
component.SSLProvider = TCPClientSSLProviders.sslpInternal;
component.Config("SSLEnabledProtocols=3072"); //TLS 1.2
component.Config("TLS12SignatureAlgorithms=sha256-rsa,sha256-dsa,sha1-rsa,sha1-dsa");
```

 The default value for this configuration setting is *sha512-ecdsa,sha512-rsa,sha512-dsa,sha384-ecdsa,sha384-rsa,sha384-dsa,sha256-ecdsa,sha256-rsa,sha256-dsa,sha224-ecdsa,sha224-rsa,sha224-dsa,sha1-ecdsa,sha1-rsa,sha1-dsa*.

To not restrict the server's certificate signature algorithm, specify an empty string as the value for this configuration setting, which will cause the signature_algorithms TLS 1.2 extension to not be sent.

**TLS12SupportedGroups**: The supported groups for ECC.This configuration setting specifies a comma-separated list of named groups used in TLS 1.2 for ECC.

The default value is *ecdhe_secp256r1,ecdhe_secp384r1,ecdhe_secp521r1*.

When using TLS 1.2 and [ssl_provider](#ssl_provider-property-pop-struct) is set to *Internal*, the values refer to the supported groups for ECC. The following values are supported:

- "ecdhe_secp256r1" (default)
- "ecdhe_secp384r1" (default)
- "ecdhe_secp521r1" (default)

**TLS13KeyShareGroups**: The groups for which to pregenerate key shares.This configuration setting specifies a comma-separated list of named groups used in TLS 1.3 for key exchange. The groups specified here will have key share data pregenerated locally before establishing a connection. This can prevent an additional roundtrip during the handshake if the group is supported by the server.

The default value is set to balance common supported groups and the computational resources required to generate key shares. As a result, only some groups are included by default in this configuration setting.

NOTE: All supported groups can always be used during the handshake even if not listed here, but if a group is used that is not present in this list, it will incur an additional roundtrip and time to generate the key share for that group.

In most cases, this configuration setting does not need to be modified. This should be modified only if there is a specific reason to do so.

The default value is *ecdhe_x25519,ecdhe_secp256r1,ecdhe_secp384r1,ffdhe_2048,ffdhe_3072*

The values are ordered from most preferred to least preferred. The following values are supported:

- "ecdhe_x25519" (default)
- "ecdhe_x448"
- "ecdhe_secp256r1" (default)
- "ecdhe_secp384r1" (default)
- "ecdhe_secp521r1"
- "ffdhe_2048" (default)
- "ffdhe_3072" (default)
- "ffdhe_4096"
- "ffdhe_6144"
- "ffdhe_8192"

**TLS13SignatureAlgorithms**: The allowed certificate signature algorithms.This configuration setting holds a comma-separated list of allowed signature algorithms. Possible values include the following:

- "ed25519" (default)
- "ed448" (default)
- "ecdsa_secp256r1_sha256" (default)
- "ecdsa_secp384r1_sha384" (default)
- "ecdsa_secp521r1_sha512" (default)
- "rsa_pkcs1_sha256" (default)
- "rsa_pkcs1_sha384" (default)
- "rsa_pkcs1_sha512" (default)
- "rsa_pss_sha256" (default)
- "rsa_pss_sha384" (default)
- "rsa_pss_sha512" (default)

 The default value is *rsa_pss_sha256,rsa_pss_sha384,rsa_pss_sha512,rsa_pkcs1_sha256,rsa_pkcs1_sha384,rsa_pkcs1_sha512,ecdsa_secp256r1_sha256,ecdsa_secp384r1_sha384,ecdsa_secp521r1_sha512,ed25519,ed448*. This configuration setting is applicable only when [SSLEnabledProtocols](#SSLEnabledProtocols) includes TLS 1.3.

**TLS13SupportedGroups**: The supported groups for (EC)DHE key exchange.This configuration setting specifies a comma-separated list of named groups used in TLS 1.3 for key exchange. This configuration setting should be modified only if there is a specific reason to do so.

The default value is *ecdhe_x25519,ecdhe_x448,ecdhe_secp256r1,ecdhe_secp384r1,ecdhe_secp521r1,ffdhe_2048,ffdhe_3072,ffdhe_4096,ffdhe_6144,ffdhe_8192,mlkem_512,mlkem_768,mlkem_1024,x25519_mlkem_768,secp256r1_mlkem_768*

The values are ordered from most preferred to least preferred. The following values are supported:

- "ecdhe_x25519" (default)
- "ecdhe_x448" (default)
- "ecdhe_secp256r1" (default)
- "ecdhe_secp384r1" (default)
- "ecdhe_secp521r1" (default)
- "ffdhe_2048" (default)
- "ffdhe_3072" (default)
- "ffdhe_4096" (default)
- "ffdhe_6144" (default)
- "ffdhe_8192" (default)
- "mlkem_512" (default)
- "mlkem_768" (default)
- "mlkem_1024" (default)
- "x25519_mlkem_768" (default)
- "secp256r1_mlkem_768" (default)

Post-quantum algorithms (*mlkem_512,mlkem_768,mlkem_1024,x25519_mlkem_768,secp256r1_mlkem_768*) in our components rely on the operating system's underlying cryptographic primitives. The following platforms are currently supported:

-  Windows Server 2025
-  Windows 11 24H2
-  Windows 11 25H2

### Socket Config Settings

**AbsoluteTimeout**: Determines whether timeouts are inactivity timeouts or absolute timeouts.If [AbsoluteTimeout](#AbsoluteTimeout) is set to True, any method that does not complete within [timeout](#timeout-property-pop-struct) seconds will be aborted. By default, *AbsoluteTimeout* is False, and the timeout is an inactivity timeout.

NOTE: This option is not valid for User Datagram Protocol (UDP) ports.

**FirewallData**: Used to send extra data to the firewall.When the firewall is a tunneling proxy, use this property to send custom (additional) headers to the firewall (e.g., headers for custom authentication schemes).

**InBufferSize**: The size in bytes of the incoming queue of the socket.This is the size of an internal queue in the Transmission Control Protocol (TCP)/IP stack. You can increase or decrease its size depending on the amount of data that you will be receiving. In some cases, increasing the value of the *InBufferSize* setting can provide significant improvements in performance.

Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the struct is activated the *InBufferSize* reverts to its defined size. The same happens if you attempt to make it too large or too small.

**OutBufferSize**: The size in bytes of the outgoing queue of the socket.This is the size of an internal queue in the TCP/IP stack. You can increase or decrease its size depending on the amount of data that you will be sending. In some cases, increasing the value of the *OutBufferSize* setting can provide significant improvements in performance.

Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the struct is activated the *OutBufferSize* reverts to its defined size. The same happens if you attempt to make it too large or too small.

### Base Config Settings

**BuildInfo**: Information about the product's build.When queried, this setting will return a string containing information about the product's build.

**CodePage**: The system code page used for Unicode to Multibyte translations.The default code page is Unicode UTF-8 (65001).

The following is a list of valid code page identifiers:

|  |  |
| --- | --- |
| Identifier | Name |
| 037 | IBM EBCDIC - U.S./Canada |
| 437 | OEM - United States |
| 500 | IBM EBCDIC - International |
| 708 | Arabic - ASMO 708 |
| 709 | Arabic - ASMO 449+, BCON V4 |
| 710 | Arabic - Transparent Arabic |
| 720 | Arabic - Transparent ASMO |
| 737 | OEM - Greek (formerly 437G) |
| 775 | OEM - Baltic |
| 850 | OEM - Multilingual Latin I |
| 852 | OEM - Latin II |
| 855 | OEM - Cyrillic (primarily Russian) |
| 857 | OEM - Turkish |
| 858 | OEM - Multilingual Latin I + Euro symbol |
| 860 | OEM - Portuguese |
| 861 | OEM - Icelandic |
| 862 | OEM - Hebrew |
| 863 | OEM - Canadian-French |
| 864 | OEM - Arabic |
| 865 | OEM - Nordic |
| 866 | OEM - Russian |
| 869 | OEM - Modern Greek |
| 870 | IBM EBCDIC - Multilingual/ROECE (Latin-2) |
| 874 | ANSI/OEM - Thai (same as 28605, ISO 8859-15) |
| 875 | IBM EBCDIC - Modern Greek |
| 932 | ANSI/OEM - Japanese, Shift-JIS |
| 936 | ANSI/OEM - Simplified Chinese (PRC, Singapore) |
| 949 | ANSI/OEM - Korean (Unified Hangul Code) |
| 950 | ANSI/OEM - Traditional Chinese (Taiwan; Hong Kong SAR, PRC) |
| 1026 | IBM EBCDIC - Turkish (Latin-5) |
| 1047 | IBM EBCDIC - Latin 1/Open System |
| 1140 | IBM EBCDIC - U.S./Canada (037 + Euro symbol) |
| 1141 | IBM EBCDIC - Germany (20273 + Euro symbol) |
| 1142 | IBM EBCDIC - Denmark/Norway (20277 + Euro symbol) |
| 1143 | IBM EBCDIC - Finland/Sweden (20278 + Euro symbol) |
| 1144 | IBM EBCDIC - Italy (20280 + Euro symbol) |
| 1145 | IBM EBCDIC - Latin America/Spain (20284 + Euro symbol) |
| 1146 | IBM EBCDIC - United Kingdom (20285 + Euro symbol) |
| 1147 | IBM EBCDIC - France (20297 + Euro symbol) |
| 1148 | IBM EBCDIC - International (500 + Euro symbol) |
| 1149 | IBM EBCDIC - Icelandic (20871 + Euro symbol) |
| 1200 | Unicode UCS-2 Little-Endian (BMP of ISO 10646) |
| 1201 | Unicode UCS-2 Big-Endian |
| 1250 | ANSI - Central European |
| 1251 | ANSI - Cyrillic |
| 1252 | ANSI - Latin I |
| 1253 | ANSI - Greek |
| 1254 | ANSI - Turkish |
| 1255 | ANSI - Hebrew |
| 1256 | ANSI - Arabic |
| 1257 | ANSI - Baltic |
| 1258 | ANSI/OEM - Vietnamese |
| 1361 | Korean (Johab) |
| 10000 | MAC - Roman |
| 10001 | MAC - Japanese |
| 10002 | MAC - Traditional Chinese (Big5) |
| 10003 | MAC - Korean |
| 10004 | MAC - Arabic |
| 10005 | MAC - Hebrew |
| 10006 | MAC - Greek I |
| 10007 | MAC - Cyrillic |
| 10008 | MAC - Simplified Chinese (GB 2312) |
| 10010 | MAC - Romania |
| 10017 | MAC - Ukraine |
| 10021 | MAC - Thai |
| 10029 | MAC - Latin II |
| 10079 | MAC - Icelandic |
| 10081 | MAC - Turkish |
| 10082 | MAC - Croatia |
| 12000 | Unicode UCS-4 Little-Endian |
| 12001 | Unicode UCS-4 Big-Endian |
| 20000 | CNS - Taiwan |
| 20001 | TCA - Taiwan |
| 20002 | Eten - Taiwan |
| 20003 | IBM5550 - Taiwan |
| 20004 | TeleText - Taiwan |
| 20005 | Wang - Taiwan |
| 20105 | IA5 IRV International Alphabet No. 5 (7-bit) |
| 20106 | IA5 German (7-bit) |
| 20107 | IA5 Swedish (7-bit) |
| 20108 | IA5 Norwegian (7-bit) |
| 20127 | US-ASCII (7-bit) |
| 20261 | T.61 |
| 20269 | ISO 6937 Non-Spacing Accent |
| 20273 | IBM EBCDIC - Germany |
| 20277 | IBM EBCDIC - Denmark/Norway |
| 20278 | IBM EBCDIC - Finland/Sweden |
| 20280 | IBM EBCDIC - Italy |
| 20284 | IBM EBCDIC - Latin America/Spain |
| 20285 | IBM EBCDIC - United Kingdom |
| 20290 | IBM EBCDIC - Japanese Katakana Extended |
| 20297 | IBM EBCDIC - France |
| 20420 | IBM EBCDIC - Arabic |
| 20423 | IBM EBCDIC - Greek |
| 20424 | IBM EBCDIC - Hebrew |
| 20833 | IBM EBCDIC - Korean Extended |
| 20838 | IBM EBCDIC - Thai |
| 20866 | Russian - KOI8-R |
| 20871 | IBM EBCDIC - Icelandic |
| 20880 | IBM EBCDIC - Cyrillic (Russian) |
| 20905 | IBM EBCDIC - Turkish |
| 20924 | IBM EBCDIC - Latin-1/Open System (1047 + Euro symbol) |
| 20932 | JIS X 0208-1990 & 0121-1990 |
| 20936 | Simplified Chinese (GB2312) |
| 21025 | IBM EBCDIC - Cyrillic (Serbian, Bulgarian) |
| 21027 | Extended Alpha Lowercase |
| 21866 | Ukrainian (KOI8-U) |
| 28591 | ISO 8859-1 Latin I |
| 28592 | ISO 8859-2 Central Europe |
| 28593 | ISO 8859-3 Latin 3 |
| 28594 | ISO 8859-4 Baltic |
| 28595 | ISO 8859-5 Cyrillic |
| 28596 | ISO 8859-6 Arabic |
| 28597 | ISO 8859-7 Greek |
| 28598 | ISO 8859-8 Hebrew |
| 28599 | ISO 8859-9 Latin 5 |
| 28605 | ISO 8859-15 Latin 9 |
| 29001 | Europa 3 |
| 38598 | ISO 8859-8 Hebrew |
| 50220 | ISO 2022 Japanese with no halfwidth Katakana |
| 50221 | ISO 2022 Japanese with halfwidth Katakana |
| 50222 | ISO 2022 Japanese JIS X 0201-1989 |
| 50225 | ISO 2022 Korean |
| 50227 | ISO 2022 Simplified Chinese |
| 50229 | ISO 2022 Traditional Chinese |
| 50930 | Japanese (Katakana) Extended |
| 50931 | US/Canada and Japanese |
| 50933 | Korean Extended and Korean |
| 50935 | Simplified Chinese Extended and Simplified Chinese |
| 50936 | Simplified Chinese |
| 50937 | US/Canada and Traditional Chinese |
| 50939 | Japanese (Latin) Extended and Japanese |
| 51932 | EUC - Japanese |
| 51936 | EUC - Simplified Chinese |
| 51949 | EUC - Korean |
| 51950 | EUC - Traditional Chinese |
| 52936 | HZ-GB2312 Simplified Chinese |
| 54936 | Windows XP: GB18030 Simplified Chinese (4 Byte) |
| 57002 | ISCII Devanagari |
| 57003 | ISCII Bengali |
| 57004 | ISCII Tamil |
| 57005 | ISCII Telugu |
| 57006 | ISCII Assamese |
| 57007 | ISCII Oriya |
| 57008 | ISCII Kannada |
| 57009 | ISCII Malayalam |
| 57010 | ISCII Gujarati |
| 57011 | ISCII Punjabi |
| 65000 | Unicode UTF-7 |
| 65001 | Unicode UTF-8 |

 The following is a list of valid code page identifiers for Mac OS only:

|  |  |
| --- | --- |
| Identifier | Name |
| 1 | ASCII |
| 2 | NEXTSTEP |
| 3 | JapaneseEUC |
| 4 | UTF8 |
| 5 | ISOLatin1 |
| 6 | Symbol |
| 7 | NonLossyASCII |
| 8 | ShiftJIS |
| 9 | ISOLatin2 |
| 10 | Unicode |
| 11 | WindowsCP1251 |
| 12 | WindowsCP1252 |
| 13 | WindowsCP1253 |
| 14 | WindowsCP1254 |
| 15 | WindowsCP1250 |
| 21 | ISO2022JP |
| 30 | MacOSRoman |
| 10 | UTF16String |
| 0x90000100 | UTF16BigEndian |
| 0x94000100 | UTF16LittleEndian |
| 0x8c000100 | UTF32String |
| 0x98000100 | UTF32BigEndian |
| 0x9c000100 | UTF32LittleEndian |
| 65536 | Proprietary |

**LicenseInfo**: Information about the current license.When queried, this setting will return a string containing information about the license this instance of a struct is using. It will return the following information:

- Product: The product the license is for.
- Product Key: The key the license was generated from.
- License Source: Where the license was found (e.g., RuntimeLicense, License File).
- License Type: The type of license installed (e.g., Royalty Free, Single Server).
- Last Valid Build: The last valid build number for which the license will work.

**MaskSensitiveData**: Whether sensitive data is masked in log messages.In certain circumstances it may be beneficial to mask sensitive data, like passwords, in log messages. Set this to *true* to mask sensitive data. The default is *true*.

**UseInternalSecurityAPI**: Whether or not to use the system security libraries or an internal implementation. When set to *false*, the struct will use the system security libraries by default to perform cryptographic functions where applicable.

Setting this configuration setting to *true* tells the struct to use the internal implementation instead of using the system security libraries.

 On Windows, this setting is set to *false* by default. On Linux/macOS, this setting is set to *true* by default.

 To use the system security libraries for Linux, OpenSSL support must be enabled. For more information on how to enable OpenSSL, please refer to the [OpenSSL Notes](platforms.md) section.

# Trappable Errors ([POP](#struct-ipworksedipop) Struct)

### POP Errors

|  |  |
| --- | --- |
| 116 | [mail_port](#mail_port-property-pop-struct) cannot be zero. Please specify a valid service port number. |
| 118 | Firewall error. Error message contains detailed description. |
| 171 | POP protocol error. Description contains the server reply. |
| 172 | Error communicating with server. Error text is attached. |
| 173 | Please specify a valid [mail_server](#mail_server-property-pop-struct). |
| 174 | Busy executing current method. |

The class may also return one of the following error codes, which are inherited from other classes.

### TCPClient Errors

|  |  |
| --- | --- |
| 100 | You cannot change the remote_port at this time. A connection is in progress. |
| 101 | You cannot change the remote_host (Server) at this time. A connection is in progress. |
| 102 | The remote_host address is invalid (0.0.0.0). |
| 104 | Already connected. If you want to reconnect, close the current connection first. |
| 106 | You cannot change the local_port at this time. A connection is in progress. |
| 107 | You cannot change the [local_host](#local_host-property-pop-struct) at this time. A connection is in progress. |
| 112 | You cannot change [MaxLineLength](#MaxLineLength) at this time. A connection is in progress. |
| 116 | remote_port cannot be zero. Please specify a valid service port number. |
| 117 | You cannot change the UseConnection option while the struct is active. |
| 135 | Operation would block. |
| 201 | Timeout. |
| 211 | Action impossible in control's present state. |
| 212 | Action impossible while not connected. |
| 213 | Action impossible while listening. |
| 301 | Timeout. |
| 302 | Could not open file. |
| 434 | Unable to convert string to selected CodePage. |
| 1105 | Already connecting. If you want to reconnect, close the current connection first. |
| 1117 | You need to connect first. |
| 1119 | You cannot change the LocalHost at this time. A connection is in progress. |
| 1120 | Connection dropped by remote host. |

### TCP/IP Errors

|  |  |
| --- | --- |
| 10004 | [10004] Interrupted system call. |
| 10009 | [10009] Bad file number. |
| 10013 | [10013] Access denied. |
| 10014 | [10014] Bad address. |
| 10022 | [10022] Invalid argument. |
| 10024 | [10024] Too many open files. |
| 10035 | [10035] Operation would block. |
| 10036 | [10036] Operation now in progress. |
| 10037 | [10037] Operation already in progress. |
| 10038 | [10038] Socket operation on nonsocket. |
| 10039 | [10039] Destination address required. |
| 10040 | [10040] Message is too long. |
| 10041 | [10041] Protocol wrong type for socket. |
| 10042 | [10042] Bad protocol option. |
| 10043 | [10043] Protocol is not supported. |
| 10044 | [10044] Socket type is not supported. |
| 10045 | [10045] Operation is not supported on socket. |
| 10046 | [10046] Protocol family is not supported. |
| 10047 | [10047] Address family is not supported by protocol family. |
| 10048 | [10048] Address already in use. |
| 10049 | [10049] Cannot assign requested address. |
| 10050 | [10050] Network is down. |
| 10051 | [10051] Network is unreachable. |
| 10052 | [10052] Net dropped connection or reset. |
| 10053 | [10053] Software caused connection abort. |
| 10054 | [10054] Connection reset by peer. |
| 10055 | [10055] No buffer space available. |
| 10056 | [10056] Socket is already connected. |
| 10057 | [10057] Socket is not connected. |
| 10058 | [10058] Cannot send after socket shutdown. |
| 10059 | [10059] Too many references, cannot splice. |
| 10060 | [10060] Connection timed out. |
| 10061 | [10061] Connection refused. |
| 10062 | [10062] Too many levels of symbolic links. |
| 10063 | [10063] File name is too long. |
| 10064 | [10064] Host is down. |
| 10065 | [10065] No route to host. |
| 10066 | [10066] Directory is not empty |
| 10067 | [10067] Too many processes. |
| 10068 | [10068] Too many users. |
| 10069 | [10069] Disc Quota Exceeded. |
| 10070 | [10070] Stale NFS file handle. |
| 10071 | [10071] Too many levels of remote in path. |
| 10091 | [10091] Network subsystem is unavailable. |
| 10092 | [10092] WINSOCK DLL Version out of range. |
| 10093 | [10093] Winsock is not loaded yet. |
| 11001 | [11001] Host not found. |
| 11002 | [11002] Nonauthoritative 'Host not found' (try again or check DNS setup). |
| 11003 | [11003] Nonrecoverable errors: FORMERR, REFUSED, NOTIMP. |
| 11004 | [11004] Valid name, no data record (check DNS setup). |
