TCPClient Class

Properties   Methods   Events   Config Settings   Errors  

The TCPClient Class is a generic Transmission Control Protocol (TCP) stream client based on an asynchronous, event-driven architecture.

Syntax

class ipworks.TCPClient

Remarks

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

Our main goal in designing TCPClient was ease of use. The class has a minimum number of properties and five events: on_connected, on_data_in, on_disconnected, on_ready_to_send, and on_error. The events are relatively self-explanatory.

The connection is attempted by calling the connect method or setting the connected property to True, and then waiting for the on_connected event. The destination is defined by setting remote_host and remote_port. Data are sent by calling the send method with Text as a parameter.

To disconnect, you just call the disconnect method or set the connected property to False. The linger property controls how the connection is terminated.

The operation of the class is almost completely asynchronous. All of the calls except the ones that deal with domain name resolution operate through asynchronous messages (no blocking calls). The gain in performance is considerable compared with using blocking calls.

Property List

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

Method List

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

Event List

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

Config Settings

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

accept_data Property

This property indicates whether data reception is currently enabled.

Syntax

def get_accept_data() -> bool: ...

accept_data = property(get_accept_data, None)

Default Value

TRUE

Remarks

This property indicates whether data reception is currently enabled. When False, data reception is disabled and the on_data_in event will not fire. Use the pause_data and process_data methods to pause and resume data reception.

This property is read-only.

bytes_sent Property

This property includes the number of bytes actually sent after a call to the SendBytes method.

Syntax

def get_bytes_sent() -> int: ...

bytes_sent = property(get_bytes_sent, None)

Default Value

0

Remarks

This property indicates how many bytes were sent after the last call to send_bytes. Please check the send_bytes method for more information.

Note: that bytes_sent will always return 0 when the class is operating in synchronous mode (i.e., the timeout property is set to a positive value.)

This property is read-only.

connected Property

This property indicates whether the class is connected.

Syntax

def get_connected() -> bool: ...

connected = property(get_connected, None)

Default Value

FALSE

Remarks

This property indicates whether the class is connected to the remote host. Use the connect and disconnect methods to manage the connection.

This property is read-only.

eol Property

This property is used to break the incoming data stream into chunks separated by EOL .

Syntax

def get_eol() -> bytes: ...
def set_eol(value: bytes) -> None: ...

eol = property(get_eol, set_eol)

Default Value

""

Remarks

This property is used to define boundaries in the input stream using the value of the property.

This property is especially useful with ASCII files. Setting it to CRLF ("\r\n") enables the incoming ASCII text stream to split into defined lines. In this case, one event is fired for each line received (as well as in packet boundaries). The CRLF ("\r\n") bytes are discarded.

This property is a binary string. Notably, this means that it can be more than one byte long, and it can contain NULL bytes.

firewall_auto_detect Property

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

Syntax

def get_firewall_auto_detect() -> bool: ...
def set_firewall_auto_detect(value: bool) -> None: ...

firewall_auto_detect = property(get_firewall_auto_detect, set_firewall_auto_detect)

Default Value

FALSE

Remarks

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

firewall_type Property

The type of firewall to connect through.

Syntax

def get_firewall_type() -> int: ...
def set_firewall_type(value: int) -> None: ...

firewall_type = property(get_firewall_type, set_firewall_type)

Default Value

0

Remarks

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

firewall_host Property

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

Syntax

def get_firewall_host() -> str: ...
def set_firewall_host(value: str) -> None: ...

firewall_host = property(get_firewall_host, set_firewall_host)

Default Value

""

Remarks

The name or IP address of the firewall (optional). If a firewall_host 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 class fails with an error.

firewall_password Property

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

Syntax

def get_firewall_password() -> str: ...
def set_firewall_password(value: str) -> None: ...

firewall_password = property(get_firewall_password, set_firewall_password)

Default Value

""

Remarks

A password if authentication is to be used when connecting through the firewall. If firewall_host is specified, the firewall_user and firewall_password properties are used to connect and authenticate to the given firewall. If the authentication fails, the class fails with an error.

firewall_port Property

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

Syntax

def get_firewall_port() -> int: ...
def set_firewall_port(value: int) -> None: ...

firewall_port = property(get_firewall_port, set_firewall_port)

Default Value

0

Remarks

The Transmission Control Protocol (TCP) port for the firewall firewall_host. See the description of the firewall_host property for details.

Note: This property is set automatically when firewall_type is set to a valid value. See the description of the firewall_type property for details.

firewall_user Property

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

Syntax

def get_firewall_user() -> str: ...
def set_firewall_user(value: str) -> None: ...

firewall_user = property(get_firewall_user, set_firewall_user)

Default Value

""

Remarks

A username if authentication is to be used when connecting through a firewall. If firewall_host is specified, this property and the firewall_password property are used to connect and authenticate to the given Firewall. If the authentication fails, the class fails with an error.

keep_alive Property

When True, KEEPALIVE packets are enabled (for long connections).

Syntax

def get_keep_alive() -> bool: ...
def set_keep_alive(value: bool) -> None: ...

keep_alive = property(get_keep_alive, set_keep_alive)

Default Value

FALSE

Remarks

The keep_alive enables the SO_KEEPALIVE option on the socket. This option prevents long connections from timing out in case of inactivity.

Note: System Transmission Control Protocol (TCP)/IP stack implementations are not required to support SO_KEEPALIVE.

linger Property

When set to True, this property ensures that connections are terminated gracefully.

Syntax

def get_linger() -> bool: ...
def set_linger(value: bool) -> None: ...

linger = property(get_linger, set_linger)

Default Value

TRUE

Remarks

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 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 is a positive value, the system will attempt to send pending data until the specified 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 class 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.

local_host Property

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

Syntax

def get_local_host() -> str: ...
def set_local_host(value: str) -> None: ...

local_host = property(get_local_host, set_local_host)

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 class initiate connections (or accept in the case of server classs) 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 class 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.

local_port Property

The TCP port in the local host where the class binds.

Syntax

def get_local_port() -> int: ...
def set_local_port(value: int) -> None: ...

local_port = property(get_local_port, set_local_port)

Default Value

0

Remarks

This property must be set before a connection is attempted. It instructs the class to bind to a specific port (or communication endpoint) in the local machine.

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

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

This property is useful when trying to connect to services that require a trusted port on the client side.

ready_to_send Property

This property indicates whether the class is ready to send data.

Syntax

def get_ready_to_send() -> bool: ...

ready_to_send = property(get_ready_to_send, None)

Default Value

FALSE

Remarks

This property indicates that the underlying Transmission Control Protocol (TCP)/IP subsystem is ready to accept data. This is True after connecting to the remote host and will become False after a failed send_bytes.

After a failed send_bytes, the on_ready_to_send event will fire and this property will be True when data can be sent again.

This property is read-only.

record_length Property

This property indicates the length of received data records.

Syntax

def get_record_length() -> int: ...

record_length = property(get_record_length, None)

Default Value

0

Remarks

This property holds the current record length set by change_record_length. When this value is a positive number, the class will accumulate data until record_length is reached and only then will fire the on_data_in event with the data of length record_length. This allows data to be received as records of known length. This value can be changed at any time by calling change_record_length, including within the on_data_in event.

A value of 0 (default) means this setting is not used.

This property is read-only.

remote_host Property

This property includes the address of the remote host. Domain names are resolved to IP addresses.

Syntax

def get_remote_host() -> str: ...
def set_remote_host(value: str) -> None: ...

remote_host = property(get_remote_host, set_remote_host)

Default Value

""

Remarks

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

If this property is set to a domain name, a DNS request is initiated, and upon successful termination of the request, this property is set to the corresponding address. If the search is not successful, an error is returned.

If the class 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.

Example. Connecting:

TCPClientControl.RemoteHost = "MyHostNameOrIP" TCPClientControl.RemotePort = 777 TCPClientControl.Connected = true

remote_port Property

This property includes the Transmission Control Protocol (TCP) port in the remote host.

Syntax

def get_remote_port() -> int: ...
def set_remote_port(value: int) -> None: ...

remote_port = property(get_remote_port, set_remote_port)

Default Value

0

Remarks

This property specifies a service port on the remote host to connect to.

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.

single_line_mode Property

This property includes a special mode for line-oriented protocols.

Syntax

def get_single_line_mode() -> bool: ...
def set_single_line_mode(value: bool) -> None: ...

single_line_mode = property(get_single_line_mode, set_single_line_mode)

Default Value

FALSE

Remarks

When this property is set to True, the class treats the incoming data stream as lines separated by carriage return line feed (CRLF), CR, or LF. The eol property is ignored.

When this property is set to True, accept_data automatically will be set to False. Please refer to the get_line method for more information.

ssl_accept_server_cert_effective_date Property

The date on which this certificate becomes valid.

Syntax

def get_ssl_accept_server_cert_effective_date() -> str: ...

ssl_accept_server_cert_effective_date = property(get_ssl_accept_server_cert_effective_date, None)

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.

ssl_accept_server_cert_expiration_date Property

The date on which the certificate expires.

Syntax

def get_ssl_accept_server_cert_expiration_date() -> str: ...

ssl_accept_server_cert_expiration_date = property(get_ssl_accept_server_cert_expiration_date, None)

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.

ssl_accept_server_cert_extended_key_usage Property

A comma-delimited list of extended key usage identifiers.

Syntax

def get_ssl_accept_server_cert_extended_key_usage() -> str: ...

ssl_accept_server_cert_extended_key_usage = property(get_ssl_accept_server_cert_extended_key_usage, None)

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.

ssl_accept_server_cert_fingerprint Property

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

Syntax

def get_ssl_accept_server_cert_fingerprint() -> str: ...

ssl_accept_server_cert_fingerprint = property(get_ssl_accept_server_cert_fingerprint, None)

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.

ssl_accept_server_cert_fingerprint_sha1 Property

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

Syntax

def get_ssl_accept_server_cert_fingerprint_sha1() -> str: ...

ssl_accept_server_cert_fingerprint_sha1 = property(get_ssl_accept_server_cert_fingerprint_sha1, None)

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.

ssl_accept_server_cert_fingerprint_sha256 Property

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

Syntax

def get_ssl_accept_server_cert_fingerprint_sha256() -> str: ...

ssl_accept_server_cert_fingerprint_sha256 = property(get_ssl_accept_server_cert_fingerprint_sha256, None)

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.

ssl_accept_server_cert_issuer Property

The issuer of the certificate.

Syntax

def get_ssl_accept_server_cert_issuer() -> str: ...

ssl_accept_server_cert_issuer = property(get_ssl_accept_server_cert_issuer, None)

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.

ssl_accept_server_cert_private_key Property

The private key of the certificate (if available).

Syntax

def get_ssl_accept_server_cert_private_key() -> str: ...

ssl_accept_server_cert_private_key = property(get_ssl_accept_server_cert_private_key, None)

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 may be available but not exportable. In this case, ssl_accept_server_cert_private_key returns an empty string.

This property is read-only.

ssl_accept_server_cert_private_key_available Property

Whether a PrivateKey is available for the selected certificate.

Syntax

def get_ssl_accept_server_cert_private_key_available() -> bool: ...

ssl_accept_server_cert_private_key_available = property(get_ssl_accept_server_cert_private_key_available, None)

Default Value

FALSE

Remarks

Whether a ssl_accept_server_cert_private_key is available for the selected certificate. If ssl_accept_server_cert_private_key_available is True, the certificate may be used for authentication purposes (e.g., server authentication).

This property is read-only.

ssl_accept_server_cert_private_key_container Property

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

Syntax

def get_ssl_accept_server_cert_private_key_container() -> str: ...

ssl_accept_server_cert_private_key_container = property(get_ssl_accept_server_cert_private_key_container, None)

Default Value

""

Remarks

The name of the ssl_accept_server_cert_private_key container for the certificate (if available). This functionality is available only on Windows platforms.

This property is read-only.

ssl_accept_server_cert_public_key Property

The public key of the certificate.

Syntax

def get_ssl_accept_server_cert_public_key() -> str: ...

ssl_accept_server_cert_public_key = property(get_ssl_accept_server_cert_public_key, None)

Default Value

""

Remarks

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

This property is read-only.

ssl_accept_server_cert_public_key_algorithm Property

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

Syntax

def get_ssl_accept_server_cert_public_key_algorithm() -> str: ...

ssl_accept_server_cert_public_key_algorithm = property(get_ssl_accept_server_cert_public_key_algorithm, None)

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.

ssl_accept_server_cert_public_key_length Property

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

Syntax

def get_ssl_accept_server_cert_public_key_length() -> int: ...

ssl_accept_server_cert_public_key_length = property(get_ssl_accept_server_cert_public_key_length, None)

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.

ssl_accept_server_cert_serial_number Property

The serial number of the certificate encoded as a string.

Syntax

def get_ssl_accept_server_cert_serial_number() -> str: ...

ssl_accept_server_cert_serial_number = property(get_ssl_accept_server_cert_serial_number, None)

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.

ssl_accept_server_cert_signature_algorithm Property

The text description of the certificate's signature algorithm.

Syntax

def get_ssl_accept_server_cert_signature_algorithm() -> str: ...

ssl_accept_server_cert_signature_algorithm = property(get_ssl_accept_server_cert_signature_algorithm, None)

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.

ssl_accept_server_cert_store Property

The name of the certificate store for the client certificate.

Syntax

def get_ssl_accept_server_cert_store() -> bytes: ...
def set_ssl_accept_server_cert_store(value: bytes) -> None: ...

ssl_accept_server_cert_store = property(get_ssl_accept_server_cert_store, set_ssl_accept_server_cert_store)

Default Value

"MY"

Remarks

The name of the certificate store for the client certificate.

The ssl_accept_server_cert_store_type property denotes the type of the certificate store specified by ssl_accept_server_cert_store. If the store is password-protected, specify the password in ssl_accept_server_cert_store_password.

ssl_accept_server_cert_store is used in conjunction with the ssl_accept_server_cert_subject property to specify client certificates. If ssl_accept_server_cert_store has a value, and ssl_accept_server_cert_subject or ssl_accept_server_cert_encoded is set, a search for a certificate is initiated. Please see the ssl_accept_server_cert_subject property for details.

Designations of certificate stores are platform dependent.

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

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).

ssl_accept_server_cert_store_password Property

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

Syntax

def get_ssl_accept_server_cert_store_password() -> str: ...
def set_ssl_accept_server_cert_store_password(value: str) -> None: ...

ssl_accept_server_cert_store_password = property(get_ssl_accept_server_cert_store_password, set_ssl_accept_server_cert_store_password)

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.

ssl_accept_server_cert_store_type Property

The type of certificate store for this certificate.

Syntax

def get_ssl_accept_server_cert_store_type() -> int: ...
def set_ssl_accept_server_cert_store_type(value: int) -> None: ...

ssl_accept_server_cert_store_type = property(get_ssl_accept_server_cert_store_type, set_ssl_accept_server_cert_store_type)

Default Value

0

Remarks

The type of certificate store for this certificate.

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

ssl_accept_server_cert_subject_alt_names Property

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

Syntax

def get_ssl_accept_server_cert_subject_alt_names() -> str: ...

ssl_accept_server_cert_subject_alt_names = property(get_ssl_accept_server_cert_subject_alt_names, None)

Default Value

""

Remarks

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

This property is read-only.

ssl_accept_server_cert_thumbprint_md5 Property

The MD5 hash of the certificate.

Syntax

def get_ssl_accept_server_cert_thumbprint_md5() -> str: ...

ssl_accept_server_cert_thumbprint_md5 = property(get_ssl_accept_server_cert_thumbprint_md5, None)

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.

ssl_accept_server_cert_thumbprint_sha1 Property

The SHA-1 hash of the certificate.

Syntax

def get_ssl_accept_server_cert_thumbprint_sha1() -> str: ...

ssl_accept_server_cert_thumbprint_sha1 = property(get_ssl_accept_server_cert_thumbprint_sha1, None)

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.

ssl_accept_server_cert_thumbprint_sha256 Property

The SHA-256 hash of the certificate.

Syntax

def get_ssl_accept_server_cert_thumbprint_sha256() -> str: ...

ssl_accept_server_cert_thumbprint_sha256 = property(get_ssl_accept_server_cert_thumbprint_sha256, None)

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.

ssl_accept_server_cert_usage Property

The text description of UsageFlags .

Syntax

def get_ssl_accept_server_cert_usage() -> str: ...

ssl_accept_server_cert_usage = property(get_ssl_accept_server_cert_usage, None)

Default Value

""

Remarks

The text description of ssl_accept_server_cert_usage_flags.

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.

ssl_accept_server_cert_usage_flags Property

The flags that show intended use for the certificate.

Syntax

def get_ssl_accept_server_cert_usage_flags() -> int: ...

ssl_accept_server_cert_usage_flags = property(get_ssl_accept_server_cert_usage_flags, None)

Default Value

0

Remarks

The flags that show intended use for the certificate. The value of ssl_accept_server_cert_usage_flags is a combination of the following flags:

Please see the ssl_accept_server_cert_usage property for a text representation of ssl_accept_server_cert_usage_flags.

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

This property is read-only.

ssl_accept_server_cert_version Property

The certificate's version number.

Syntax

def get_ssl_accept_server_cert_version() -> str: ...

ssl_accept_server_cert_version = property(get_ssl_accept_server_cert_version, None)

Default Value

""

Remarks

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

This property is read-only.

ssl_accept_server_cert_subject Property

The subject of the certificate used for client authentication.

Syntax

def get_ssl_accept_server_cert_subject() -> str: ...
def set_ssl_accept_server_cert_subject(value: str) -> None: ...

ssl_accept_server_cert_subject = property(get_ssl_accept_server_cert_subject, set_ssl_accept_server_cert_subject)

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=support@nsoftware.com". Common fields and their meanings are as follows:

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

ssl_accept_server_cert_encoded Property

The certificate (PEM/Base64 encoded).

Syntax

def get_ssl_accept_server_cert_encoded() -> bytes: ...
def set_ssl_accept_server_cert_encoded(value: bytes) -> None: ...

ssl_accept_server_cert_encoded = property(get_ssl_accept_server_cert_encoded, set_ssl_accept_server_cert_encoded)

Default Value

""

Remarks

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

When ssl_accept_server_cert_encoded is set, a search is initiated in the current ssl_accept_server_cert_store for the private key of the certificate. If the key is found, ssl_accept_server_cert_subject is updated to reflect the full subject of the selected certificate; otherwise, ssl_accept_server_cert_subject is set to an empty string.

ssl_cert_effective_date Property

The date on which this certificate becomes valid.

Syntax

def get_ssl_cert_effective_date() -> str: ...

ssl_cert_effective_date = property(get_ssl_cert_effective_date, None)

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.

ssl_cert_expiration_date Property

The date on which the certificate expires.

Syntax

def get_ssl_cert_expiration_date() -> str: ...

ssl_cert_expiration_date = property(get_ssl_cert_expiration_date, None)

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.

ssl_cert_extended_key_usage Property

A comma-delimited list of extended key usage identifiers.

Syntax

def get_ssl_cert_extended_key_usage() -> str: ...

ssl_cert_extended_key_usage = property(get_ssl_cert_extended_key_usage, None)

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.

ssl_cert_fingerprint Property

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

Syntax

def get_ssl_cert_fingerprint() -> str: ...

ssl_cert_fingerprint = property(get_ssl_cert_fingerprint, None)

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.

ssl_cert_fingerprint_sha1 Property

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

Syntax

def get_ssl_cert_fingerprint_sha1() -> str: ...

ssl_cert_fingerprint_sha1 = property(get_ssl_cert_fingerprint_sha1, None)

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.

ssl_cert_fingerprint_sha256 Property

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

Syntax

def get_ssl_cert_fingerprint_sha256() -> str: ...

ssl_cert_fingerprint_sha256 = property(get_ssl_cert_fingerprint_sha256, None)

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.

ssl_cert_issuer Property

The issuer of the certificate.

Syntax

def get_ssl_cert_issuer() -> str: ...

ssl_cert_issuer = property(get_ssl_cert_issuer, None)

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.

ssl_cert_private_key Property

The private key of the certificate (if available).

Syntax

def get_ssl_cert_private_key() -> str: ...

ssl_cert_private_key = property(get_ssl_cert_private_key, None)

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 may be available but not exportable. In this case, ssl_cert_private_key returns an empty string.

This property is read-only.

ssl_cert_private_key_available Property

Whether a PrivateKey is available for the selected certificate.

Syntax

def get_ssl_cert_private_key_available() -> bool: ...

ssl_cert_private_key_available = property(get_ssl_cert_private_key_available, None)

Default Value

FALSE

Remarks

Whether a ssl_cert_private_key is available for the selected certificate. If ssl_cert_private_key_available is True, the certificate may be used for authentication purposes (e.g., server authentication).

This property is read-only.

ssl_cert_private_key_container Property

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

Syntax

def get_ssl_cert_private_key_container() -> str: ...

ssl_cert_private_key_container = property(get_ssl_cert_private_key_container, None)

Default Value

""

Remarks

The name of the ssl_cert_private_key container for the certificate (if available). This functionality is available only on Windows platforms.

This property is read-only.

ssl_cert_public_key Property

The public key of the certificate.

Syntax

def get_ssl_cert_public_key() -> str: ...

ssl_cert_public_key = property(get_ssl_cert_public_key, None)

Default Value

""

Remarks

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

This property is read-only.

ssl_cert_public_key_algorithm Property

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

Syntax

def get_ssl_cert_public_key_algorithm() -> str: ...

ssl_cert_public_key_algorithm = property(get_ssl_cert_public_key_algorithm, None)

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.

ssl_cert_public_key_length Property

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

Syntax

def get_ssl_cert_public_key_length() -> int: ...

ssl_cert_public_key_length = property(get_ssl_cert_public_key_length, None)

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.

ssl_cert_serial_number Property

The serial number of the certificate encoded as a string.

Syntax

def get_ssl_cert_serial_number() -> str: ...

ssl_cert_serial_number = property(get_ssl_cert_serial_number, None)

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.

ssl_cert_signature_algorithm Property

The text description of the certificate's signature algorithm.

Syntax

def get_ssl_cert_signature_algorithm() -> str: ...

ssl_cert_signature_algorithm = property(get_ssl_cert_signature_algorithm, None)

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.

ssl_cert_store Property

The name of the certificate store for the client certificate.

Syntax

def get_ssl_cert_store() -> bytes: ...
def set_ssl_cert_store(value: bytes) -> None: ...

ssl_cert_store = property(get_ssl_cert_store, set_ssl_cert_store)

Default Value

"MY"

Remarks

The name of the certificate store for the client certificate.

The ssl_cert_store_type property denotes the type of the certificate store specified by ssl_cert_store. If the store is password-protected, specify the password in ssl_cert_store_password.

ssl_cert_store is used in conjunction with the ssl_cert_subject property to specify client certificates. If ssl_cert_store has a value, and ssl_cert_subject or ssl_cert_encoded is set, a search for a certificate is initiated. Please see the ssl_cert_subject property for details.

Designations of certificate stores are platform dependent.

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

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).

ssl_cert_store_password Property

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

Syntax

def get_ssl_cert_store_password() -> str: ...
def set_ssl_cert_store_password(value: str) -> None: ...

ssl_cert_store_password = property(get_ssl_cert_store_password, set_ssl_cert_store_password)

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.

ssl_cert_store_type Property

The type of certificate store for this certificate.

Syntax

def get_ssl_cert_store_type() -> int: ...
def set_ssl_cert_store_type(value: int) -> None: ...

ssl_cert_store_type = property(get_ssl_cert_store_type, set_ssl_cert_store_type)

Default Value

0

Remarks

The type of certificate store for this certificate.

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

ssl_cert_subject_alt_names Property

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

Syntax

def get_ssl_cert_subject_alt_names() -> str: ...

ssl_cert_subject_alt_names = property(get_ssl_cert_subject_alt_names, None)

Default Value

""

Remarks

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

This property is read-only.

ssl_cert_thumbprint_md5 Property

The MD5 hash of the certificate.

Syntax

def get_ssl_cert_thumbprint_md5() -> str: ...

ssl_cert_thumbprint_md5 = property(get_ssl_cert_thumbprint_md5, None)

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.

ssl_cert_thumbprint_sha1 Property

The SHA-1 hash of the certificate.

Syntax

def get_ssl_cert_thumbprint_sha1() -> str: ...

ssl_cert_thumbprint_sha1 = property(get_ssl_cert_thumbprint_sha1, None)

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.

ssl_cert_thumbprint_sha256 Property

The SHA-256 hash of the certificate.

Syntax

def get_ssl_cert_thumbprint_sha256() -> str: ...

ssl_cert_thumbprint_sha256 = property(get_ssl_cert_thumbprint_sha256, None)

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.

ssl_cert_usage Property

The text description of UsageFlags .

Syntax

def get_ssl_cert_usage() -> str: ...

ssl_cert_usage = property(get_ssl_cert_usage, None)

Default Value

""

Remarks

The text description of ssl_cert_usage_flags.

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.

ssl_cert_usage_flags Property

The flags that show intended use for the certificate.

Syntax

def get_ssl_cert_usage_flags() -> int: ...

ssl_cert_usage_flags = property(get_ssl_cert_usage_flags, None)

Default Value

0

Remarks

The flags that show intended use for the certificate. The value of ssl_cert_usage_flags is a combination of the following flags:

Please see the ssl_cert_usage property for a text representation of ssl_cert_usage_flags.

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

This property is read-only.

ssl_cert_version Property

The certificate's version number.

Syntax

def get_ssl_cert_version() -> str: ...

ssl_cert_version = property(get_ssl_cert_version, None)

Default Value

""

Remarks

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

This property is read-only.

ssl_cert_subject Property

The subject of the certificate used for client authentication.

Syntax

def get_ssl_cert_subject() -> str: ...
def set_ssl_cert_subject(value: str) -> None: ...

ssl_cert_subject = property(get_ssl_cert_subject, set_ssl_cert_subject)

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=support@nsoftware.com". Common fields and their meanings are as follows:

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

ssl_cert_encoded Property

The certificate (PEM/Base64 encoded).

Syntax

def get_ssl_cert_encoded() -> bytes: ...
def set_ssl_cert_encoded(value: bytes) -> None: ...

ssl_cert_encoded = property(get_ssl_cert_encoded, set_ssl_cert_encoded)

Default Value

""

Remarks

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

When ssl_cert_encoded is set, a search is initiated in the current ssl_cert_store for the private key of the certificate. If the key is found, ssl_cert_subject is updated to reflect the full subject of the selected certificate; otherwise, ssl_cert_subject is set to an empty string.

ssl_enabled Property

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

Syntax

def get_ssl_enabled() -> bool: ...
def set_ssl_enabled(value: bool) -> None: ...

ssl_enabled = property(get_ssl_enabled, set_ssl_enabled)

Default Value

FALSE

Remarks

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

TLS/SSL may also be enabled by setting ssl_start_mode. Setting ssl_start_mode will automatically update this property value.

ssl_provider Property

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

Syntax

def get_ssl_provider() -> int: ...
def set_ssl_provider(value: int) -> None: ...

ssl_provider = property(get_ssl_provider, set_ssl_provider)

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 class 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:

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

When Automatic is selected, on Windows, the class will use the platform implementation. On Linux/macOS, the class will use the internal implementation. When TLS 1.3 is enabled via SSLEnabledProtocols, the internal implementation is used on all platforms.

ssl_server_cert_effective_date Property

The date on which this certificate becomes valid.

Syntax

def get_ssl_server_cert_effective_date() -> str: ...

ssl_server_cert_effective_date = property(get_ssl_server_cert_effective_date, None)

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.

ssl_server_cert_expiration_date Property

The date on which the certificate expires.

Syntax

def get_ssl_server_cert_expiration_date() -> str: ...

ssl_server_cert_expiration_date = property(get_ssl_server_cert_expiration_date, None)

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.

ssl_server_cert_extended_key_usage Property

A comma-delimited list of extended key usage identifiers.

Syntax

def get_ssl_server_cert_extended_key_usage() -> str: ...

ssl_server_cert_extended_key_usage = property(get_ssl_server_cert_extended_key_usage, None)

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.

ssl_server_cert_fingerprint Property

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

Syntax

def get_ssl_server_cert_fingerprint() -> str: ...

ssl_server_cert_fingerprint = property(get_ssl_server_cert_fingerprint, None)

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.

ssl_server_cert_fingerprint_sha1 Property

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

Syntax

def get_ssl_server_cert_fingerprint_sha1() -> str: ...

ssl_server_cert_fingerprint_sha1 = property(get_ssl_server_cert_fingerprint_sha1, None)

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.

ssl_server_cert_fingerprint_sha256 Property

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

Syntax

def get_ssl_server_cert_fingerprint_sha256() -> str: ...

ssl_server_cert_fingerprint_sha256 = property(get_ssl_server_cert_fingerprint_sha256, None)

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.

ssl_server_cert_issuer Property

The issuer of the certificate.

Syntax

def get_ssl_server_cert_issuer() -> str: ...

ssl_server_cert_issuer = property(get_ssl_server_cert_issuer, None)

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.

ssl_server_cert_private_key Property

The private key of the certificate (if available).

Syntax

def get_ssl_server_cert_private_key() -> str: ...

ssl_server_cert_private_key = property(get_ssl_server_cert_private_key, None)

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 may be available but not exportable. In this case, ssl_server_cert_private_key returns an empty string.

This property is read-only.

ssl_server_cert_private_key_available Property

Whether a PrivateKey is available for the selected certificate.

Syntax

def get_ssl_server_cert_private_key_available() -> bool: ...

ssl_server_cert_private_key_available = property(get_ssl_server_cert_private_key_available, None)

Default Value

FALSE

Remarks

Whether a ssl_server_cert_private_key is available for the selected certificate. If ssl_server_cert_private_key_available is True, the certificate may be used for authentication purposes (e.g., server authentication).

This property is read-only.

ssl_server_cert_private_key_container Property

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

Syntax

def get_ssl_server_cert_private_key_container() -> str: ...

ssl_server_cert_private_key_container = property(get_ssl_server_cert_private_key_container, None)

Default Value

""

Remarks

The name of the ssl_server_cert_private_key container for the certificate (if available). This functionality is available only on Windows platforms.

This property is read-only.

ssl_server_cert_public_key Property

The public key of the certificate.

Syntax

def get_ssl_server_cert_public_key() -> str: ...

ssl_server_cert_public_key = property(get_ssl_server_cert_public_key, None)

Default Value

""

Remarks

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

This property is read-only.

ssl_server_cert_public_key_algorithm Property

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

Syntax

def get_ssl_server_cert_public_key_algorithm() -> str: ...

ssl_server_cert_public_key_algorithm = property(get_ssl_server_cert_public_key_algorithm, None)

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.

ssl_server_cert_public_key_length Property

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

Syntax

def get_ssl_server_cert_public_key_length() -> int: ...

ssl_server_cert_public_key_length = property(get_ssl_server_cert_public_key_length, None)

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.

ssl_server_cert_serial_number Property

The serial number of the certificate encoded as a string.

Syntax

def get_ssl_server_cert_serial_number() -> str: ...

ssl_server_cert_serial_number = property(get_ssl_server_cert_serial_number, None)

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.

ssl_server_cert_signature_algorithm Property

The text description of the certificate's signature algorithm.

Syntax

def get_ssl_server_cert_signature_algorithm() -> str: ...

ssl_server_cert_signature_algorithm = property(get_ssl_server_cert_signature_algorithm, None)

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.

ssl_server_cert_store Property

The name of the certificate store for the client certificate.

Syntax

def get_ssl_server_cert_store() -> bytes: ...

ssl_server_cert_store = property(get_ssl_server_cert_store, None)

Default Value

"MY"

Remarks

The name of the certificate store for the client certificate.

The ssl_server_cert_store_type property denotes the type of the certificate store specified by ssl_server_cert_store. If the store is password-protected, specify the password in ssl_server_cert_store_password.

ssl_server_cert_store is used in conjunction with the ssl_server_cert_subject property to specify client certificates. If ssl_server_cert_store has a value, and ssl_server_cert_subject or ssl_server_cert_encoded is set, a search for a certificate is initiated. Please see the ssl_server_cert_subject property for details.

Designations of certificate stores are platform dependent.

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

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.

ssl_server_cert_store_password Property

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

Syntax

def get_ssl_server_cert_store_password() -> str: ...

ssl_server_cert_store_password = property(get_ssl_server_cert_store_password, None)

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.

ssl_server_cert_store_type Property

The type of certificate store for this certificate.

Syntax

def get_ssl_server_cert_store_type() -> int: ...

ssl_server_cert_store_type = property(get_ssl_server_cert_store_type, None)

Default Value

0

Remarks

The type of certificate store for this certificate.

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

This property is read-only.

ssl_server_cert_subject_alt_names Property

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

Syntax

def get_ssl_server_cert_subject_alt_names() -> str: ...

ssl_server_cert_subject_alt_names = property(get_ssl_server_cert_subject_alt_names, None)

Default Value

""

Remarks

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

This property is read-only.

ssl_server_cert_thumbprint_md5 Property

The MD5 hash of the certificate.

Syntax

def get_ssl_server_cert_thumbprint_md5() -> str: ...

ssl_server_cert_thumbprint_md5 = property(get_ssl_server_cert_thumbprint_md5, None)

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.

ssl_server_cert_thumbprint_sha1 Property

The SHA-1 hash of the certificate.

Syntax

def get_ssl_server_cert_thumbprint_sha1() -> str: ...

ssl_server_cert_thumbprint_sha1 = property(get_ssl_server_cert_thumbprint_sha1, None)

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.

ssl_server_cert_thumbprint_sha256 Property

The SHA-256 hash of the certificate.

Syntax

def get_ssl_server_cert_thumbprint_sha256() -> str: ...

ssl_server_cert_thumbprint_sha256 = property(get_ssl_server_cert_thumbprint_sha256, None)

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.

ssl_server_cert_usage Property

The text description of UsageFlags .

Syntax

def get_ssl_server_cert_usage() -> str: ...

ssl_server_cert_usage = property(get_ssl_server_cert_usage, None)

Default Value

""

Remarks

The text description of ssl_server_cert_usage_flags.

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.

ssl_server_cert_usage_flags Property

The flags that show intended use for the certificate.

Syntax

def get_ssl_server_cert_usage_flags() -> int: ...

ssl_server_cert_usage_flags = property(get_ssl_server_cert_usage_flags, None)

Default Value

0

Remarks

The flags that show intended use for the certificate. The value of ssl_server_cert_usage_flags is a combination of the following flags:

Please see the ssl_server_cert_usage property for a text representation of ssl_server_cert_usage_flags.

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

This property is read-only.

ssl_server_cert_version Property

The certificate's version number.

Syntax

def get_ssl_server_cert_version() -> str: ...

ssl_server_cert_version = property(get_ssl_server_cert_version, None)

Default Value

""

Remarks

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

This property is read-only.

ssl_server_cert_subject Property

The subject of the certificate used for client authentication.

Syntax

def get_ssl_server_cert_subject() -> str: ...

ssl_server_cert_subject = property(get_ssl_server_cert_subject, None)

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=support@nsoftware.com". Common fields and their meanings are as follows:

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

This property is read-only.

ssl_server_cert_encoded Property

The certificate (PEM/Base64 encoded).

Syntax

def get_ssl_server_cert_encoded() -> bytes: ...

ssl_server_cert_encoded = property(get_ssl_server_cert_encoded, None)

Default Value

""

Remarks

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

When ssl_server_cert_encoded is set, a search is initiated in the current ssl_server_cert_store for the private key of the certificate. If the key is found, ssl_server_cert_subject is updated to reflect the full subject of the selected certificate; otherwise, ssl_server_cert_subject is set to an empty string.

This property is read-only.

ssl_start_mode Property

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

Syntax

def get_ssl_start_mode() -> int: ...
def set_ssl_start_mode(value: int) -> None: ...

ssl_start_mode = property(get_ssl_start_mode, set_ssl_start_mode)

Default Value

3

Remarks

The ssl_start_mode property may have one of the following values:

timeout Property

This property includes the timeout for the class.

Syntax

def get_timeout() -> int: ...
def set_timeout(value: int) -> None: ...

timeout = property(get_timeout, set_timeout)

Default Value

60

Remarks

If the timeout property is set to 0, all operations return immediately, potentially failing with a WOULDBLOCK error if data cannot be sent immediately.

If timeout is set to a positive value, data is sent in a blocking manner and the class will wait for the operation to complete before returning control. The class will handle any potential WOULDBLOCK errors internally and automatically retry the operation for a maximum of timeout seconds.

The class will use do_events 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 class 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.

change_record_length Method

This method changes the length of received data records.

Syntax

def change_record_length(record_length: int) -> None: ...

Remarks

This method defines the length of data records to be received (in bytes).

If RecordLength is set to a positive value, the class will accumulate data until RecordLength bytes of data are received and only then will it fire the on_data_in event with data of length RecordLength. This allows data to be received as records of known length. This method can be called at any time to change the record length, including within the on_data_in event.

A value of 0 (default) means this functionality is not used.

config Method

Sets or retrieves a configuration setting.

Syntax

def config(configuration_string: str) -> str: ...

Remarks

config is a generic method available in every class. It is used to set and retrieve configuration settings for the class.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, 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, you must call Config("PROPERTY"). The value will be returned as a string.

connect Method

This method connects to a remote host.

Syntax

def connect() -> None: ...

Remarks

This method connects to the remote host specified by remote_host and remote_port. For instance: component.RemoteHost = "MyHostNameOrIP"; component.RemotePort = 7777; component.Connect();

connect_to Method

This method connects to a remote host.

Syntax

def connect_to(host: str, port: int) -> None: ...

Remarks

This method connects to the remote host specified by the Host and Port parameters. For instance: component.ConnectTo("MyHostNameOrIP", 777)

disconnect Method

This method disconnects from the remote host.

Syntax

def disconnect() -> None: ...

Remarks

This method disconnects from the remote host. Calling this method is equivalent to setting the connected property to False.

do_events Method

This method processes events from the internal message queue.

Syntax

def do_events() -> None: ...

Remarks

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

get_line Method

This method gets a line of text from the server.

Syntax

def get_line() -> str: ...

Remarks

This method gets a line of text from the server. This method is an alternative method of receiving data for line-oriented protocols. The class will block if necessary and then will return the received line. accept_data will be set automatically to True when the method is called, and then will be set to False after a line is received.

Please refer to the single_line_mode property for more information.

interrupt Method

This method interrupts the current action.

Syntax

def interrupt() -> None: ...

Remarks

This method interrupts the current action. If you use send_file to upload a file, the class will run synchronously until the upload is completed. This method will allow you to stop the file from uploading without disconnecting from the host.

pause_data Method

This method pauses data reception.

Syntax

def pause_data() -> None: ...

Remarks

This method pauses data reception when called. While data reception is paused, the on_data_in event will not fire. Call process_data to reenable data reception.

process_data Method

This method reenables data reception after a call to PauseData .

Syntax

def process_data() -> None: ...

Remarks

This method reenables data reception after a previous call to pause_data. When pause_data is called, the on_data_in event will not fire. To reenable data reception and allow on_data_in to fire, call this method.

Note: This method is used only after previously calling pause_data. It does not need to be called to process incoming data by default.

reset Method

This method will reset the class.

Syntax

def reset() -> None: ...

Remarks

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

send Method

This method sends binary data to the remote host.

Syntax

def send(text: bytes) -> None: ...

Remarks

This method sends the specified binary data to the remote host. To send text, use the send_text method instead.

When timeout is set to 0, the class will behave asynchronously. If you are sending data to the remote host faster than it can process it, or faster than the network's bandwidth allows, the outgoing queue might fill up. When this happens, the operation fails with error 10035: "[10035] Operation would block" (WSAEWOULDBLOCK). You can check this error, and then try to send the data again. . The bytes_sent property shows how many bytes were sent (if any). If 0 bytes were sent, then you can wait for the on_ready_to_send event before attempting to send data again.

Note: The on_ready_to_send event is not fired when part of the data is sent successfully.

send_bytes Method

This method sends binary data to the remote host.

Syntax

def send_bytes(data: bytes) -> None: ...

Remarks

This method sends the specified binary data to the remote host. To send text, use the send_text method instead.

When timeout is set to 0, the class will behave asynchronously. If you are sending data to the remote host faster than it can process it, or faster than the network's bandwidth allows, the outgoing queue might fill up. When this happens, the operation fails with error 10035: "[10035] Operation would block" (WSAEWOULDBLOCK). You can check this error, and then try to send the data again. . The bytes_sent property shows how many bytes were sent (if any). If 0 bytes were sent, then you can wait for the on_ready_to_send event before attempting to send data again.

Note: The on_ready_to_send event is not fired when part of the data is sent successfully.

send_file Method

This method sends a file to the remote host.

Syntax

def send_file(file_name: str) -> None: ...

Remarks

This method sends the specified file to the remote host.

This method requires timeout be set to a positive value. This allows the class to ensure that the file is transferred completely without a WOULDBLOCK error. See timeout for details.

send_line Method

This method sends a string followed by a newline.

Syntax

def send_line(text: str) -> None: ...

Remarks

This method sends a string followed by a newline. This method is used to send data with line-oriented protocols. The line is followed by CRLF ("\r\n") .

Please refer to the get_line method and single_line_mode property for more information.

send_text Method

This method sends text to the remote host.

Syntax

def send_text(text: str) -> None: ...

Remarks

This method sends the specified text to the remote host. To send binary data, use the send_bytes method instead.

When timeout is set to 0, the class will behave asynchronously. If you are sending data to the remote host faster than it can process it, or faster than the network's bandwidth allows, the outgoing queue might fill up. When this happens, the operation fails with error 10035: "[10035] Operation would block" (WSAEWOULDBLOCK). You can check this error, and then try to send the data again. . The bytes_sent property shows how many bytes were sent (if any). If 0 bytes were sent, then you can wait for the on_ready_to_send event before attempting to send data again.

Note: The on_ready_to_send event is not fired when part of the data is sent successfully.

start_ssl Method

This method starts Secure Sockets Layer (SSL) negotiation on a plaintext connection.

Syntax

def start_ssl() -> None: ...

Remarks

This method is used to start SSL negotiation on a plaintext connection. Please refer to the ssl_start_mode property for more information.

Note: The on_connected event will fire again after SSL negotiation is complete.

on_connected Event

Fired immediately after a connection completes (or fails).

Syntax

class TCPClientConnectedEventParams(object):
  @property
  def status_code() -> int: ...

  @property
  def description() -> str: ...

# In class TCPClient:
@property
def on_connected() -> Callable[[TCPClientConnectedEventParams], None]: ...
@on_connected.setter
def on_connected(event_hook: Callable[[TCPClientConnectedEventParams], None]) -> None: ...

Remarks

If the connection is made normally, StatusCode is 0 and Description is "OK".

If the connection fails, StatusCode has the error code returned by the Transmission Control Protocol (TCP)/IP stack. Description contains a description of this code. The value of StatusCode is equal to the value of the error.

Please refer to the Error Codes section for more information.

on_connection_status Event

Fired to indicate changes in the connection state.

Syntax

class TCPClientConnectionStatusEventParams(object):
  @property
  def connection_event() -> str: ...

  @property
  def status_code() -> int: ...

  @property
  def description() -> str: ...

# In class TCPClient:
@property
def on_connection_status() -> Callable[[TCPClientConnectionStatusEventParams], None]: ...
@on_connection_status.setter
def on_connection_status(event_hook: Callable[[TCPClientConnectionStatusEventParams], None]) -> None: ...

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 ConnectionEvent parameter indicates the type of connection event. Values may include the following:

on_data_in Event

This event is fired when data (complete lines) come in.

Syntax

class TCPClientDataInEventParams(object):
  @property
  def text() -> bytes: ...

  @property
  def eol() -> bool: ...

# In class TCPClient:
@property
def on_data_in() -> Callable[[TCPClientDataInEventParams], None]: ...
@on_data_in.setter
def on_data_in(event_hook: Callable[[TCPClientDataInEventParams], None]) -> None: ...

Remarks

Trapping the on_data_in event is your only chance to get the data coming from the other end of the connection. The incoming data are provided through the Text parameter.

EOL indicates whether or not the eol string was found at the end of Text. If the eol string was found, then EOL is True.

If Text is part of a data portion of length larger than MaxLineLength with no eol strings in it, then EOL is False. Note: This means that one or more on_data_in events with EOL set to False can be received during a connection.

If the eol property is "" (empty string), then EOL can be disregarded (it is always True).

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.

on_disconnected Event

Fired when a connection is closed.

Syntax

class TCPClientDisconnectedEventParams(object):
  @property
  def status_code() -> int: ...

  @property
  def description() -> str: ...

# In class TCPClient:
@property
def on_disconnected() -> Callable[[TCPClientDisconnectedEventParams], None]: ...
@on_disconnected.setter
def on_disconnected(event_hook: Callable[[TCPClientDisconnectedEventParams], None]) -> None: ...

Remarks

If the connection is broken normally, StatusCode is 0 and Description is "OK".

If the connection is broken for any other reason, StatusCode has the error code returned by the Transmission Control Protocol (TCP/IP) subsystem. Description contains a description of this code. The value of StatusCode is equal to the value of the TCP/IP error.

Please refer to the Error Codes section for more information.

on_error Event

Fired when information is available about errors during data delivery.

Syntax

class TCPClientErrorEventParams(object):
  @property
  def error_code() -> int: ...

  @property
  def description() -> str: ...

# In class TCPClient:
@property
def on_error() -> Callable[[TCPClientErrorEventParams], None]: ...
@on_error.setter
def on_error(event_hook: Callable[[TCPClientErrorEventParams], None]) -> None: ...

Remarks

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

The ErrorCode 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 section.

on_ready_to_send Event

This event is fired when the class is ready to send data.

Syntax

class TCPClientReadyToSendEventParams(object):
# In class TCPClient:
@property
def on_ready_to_send() -> Callable[[TCPClientReadyToSendEventParams], None]: ...
@on_ready_to_send.setter
def on_ready_to_send(event_hook: Callable[[TCPClientReadyToSendEventParams], None]) -> None: ...

Remarks

The on_ready_to_send event indicates that the underlying Transmission Control Protocol (TCP)/IP subsystem is ready to accept data after a failed send_bytes. This event also is fired immediately after a connection to the remote host is established.

on_ssl_server_authentication Event

Fired after the server presents its certificate to the client.

Syntax

class TCPClientSSLServerAuthenticationEventParams(object):
  @property
  def cert_encoded() -> bytes: ...

  @property
  def cert_subject() -> str: ...

  @property
  def cert_issuer() -> str: ...

  @property
  def status() -> str: ...

  @property
  def accept() -> bool: ...
  @accept.setter
  def accept(value) -> None: ...

# In class TCPClient:
@property
def on_ssl_server_authentication() -> Callable[[TCPClientSSLServerAuthenticationEventParams], None]: ...
@on_ssl_server_authentication.setter
def on_ssl_server_authentication(event_hook: Callable[[TCPClientSSLServerAuthenticationEventParams], None]) -> None: ...

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

Fired when secure connection progress messages are available.

Syntax

class TCPClientSSLStatusEventParams(object):
  @property
  def message() -> str: ...

# In class TCPClient:
@property
def on_ssl_status() -> Callable[[TCPClientSSLStatusEventParams], None]: ...
@on_ssl_status.setter
def on_ssl_status(event_hook: Callable[[TCPClientSSLStatusEventParams], None]) -> None: ...

Remarks

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

TCPClient Config Settings

TCPClient Config Settings

SSL Config Settings

-----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-----

-----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-----

-----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-----

Socket Config Settings

Base Config Settings

TCPClient Errors

TCPClient Errors

SSL Errors

TCP/IP Errors