class QSslPreSharedKeyAuthenticator#

The QSslPreSharedKeyAuthenticator class provides authentication data for pre shared keys (PSK) ciphersuites. More…

Synopsis#

Methods#

def __init__()
def identity()
def identityHint()
def maximumIdentityLength()
def maximumPreSharedKeyLength()
def __ne__()
def __eq__()
def preSharedKey()
def setIdentity()
def setPreSharedKey()
def swap()

Note

This documentation may contain snippets that were automatically translated from C++ to Python. We always welcome contributions to the snippet translation. If you see an issue with the translation, you can also let us know by creating a ticket on https:/bugreports.qt.io/projects/PYSIDE

Detailed Description#

Warning

This section contains snippets that were automatically translated from C++ to Python and may contain errors.

The QSslPreSharedKeyAuthenticator class is used by an SSL socket to provide the required authentication data in a pre shared key (PSK) ciphersuite.

In a PSK handshake, the client must derive a key, which must match the key set on the server. The exact algorithm of deriving the key depends on the application; however, for this purpose, the server may send an identity hint to the client. This hint, combined with other information (for instance a passphrase), is then used by the client to construct the shared key.

The QSslPreSharedKeyAuthenticator provides means to client applications for completing the PSK handshake. The client application needs to connect a slot to the preSharedKeyAuthenticationRequired() signal:

socket.preSharedKeyAuthenticationRequired.connect(
        self.handlePreSharedKeyAuthentication)

The signal carries a QSslPreSharedKeyAuthenticator object containing the identity hint the server sent to the client, and which must be filled with the corresponding client identity and the derived key:

def handlePreSharedKeyAuthentication(self, authenticator):

    authenticator.setIdentity("My Qt App")
    key = deriveKey(authenticator.identityHint(), passphrase)
    authenticator.setPreSharedKey(key)

Note

PSK ciphersuites are supported only when using OpenSSL 1.0.1 (or greater) as the SSL backend.

Note

PSK is currently only supported in OpenSSL.

See also

QSslSocket

__init__()#

Constructs a default QSslPreSharedKeyAuthenticator object.

The identity hint, the identity and the key will be initialized to empty byte arrays; the maximum length for both the identity and the key will be initialized to 0.

__init__(authenticator)

Parameters:: authenticator – QSslPreSharedKeyAuthenticator

Constructs a QSslPreSharedKeyAuthenticator object as a copy of authenticator.

See also

operator=()

identity()#

Return type:: QByteArray

Returns the PSK client identity.

See also

setIdentity()

identityHint()#

Return type:: QByteArray

Returns the PSK identity hint as provided by the server. The interpretation of this hint is left to the application.

maximumIdentityLength()#

Return type:: int

Returns the maximum length, in bytes, of the PSK client identity.

Note

it is possible to set an identity whose length is greater than maximumIdentityLength(); in this case, only the first maximumIdentityLength() bytes will be actually sent to the server.

See also

setIdentity()

maximumPreSharedKeyLength()#

Return type:: int

Returns the maximum length, in bytes, of the pre shared key.

Note

it is possible to set a key whose length is greater than the maximumPreSharedKeyLength(); in this case, only the first maximumPreSharedKeyLength() bytes will be actually sent to the server.

See also

setPreSharedKey()

__ne__(rhs)#

Parameters:: rhs – QSslPreSharedKeyAuthenticator
Return type:: bool

Returns true if the authenticator object lhs is not equal to rhs; false otherwise.

__eq__(rhs)#

Parameters:: rhs – QSslPreSharedKeyAuthenticator
Return type:: bool

Returns true if the authenticator object lhs is equal to rhs; false otherwise.

Two authenticator objects are equal if and only if they have the same identity hint, identity, pre shared key, maximum length for the identity and maximum length for the pre shared key.

preSharedKey()#

Return type:: QByteArray

Returns the pre shared key.

See also

setPreSharedKey()

setIdentity(identity)#

Parameters:: identity – QByteArray

Sets the PSK client identity (to be advised to the server) to identity.

Note

it is possible to set an identity whose length is greater than maximumIdentityLength() ; in this case, only the first maximumIdentityLength() bytes will be actually sent to the server.

See also

identity() maximumIdentityLength()

setPreSharedKey(preSharedKey)#

Parameters:: preSharedKey – QByteArray

Sets the pre shared key to preSharedKey.

Note

it is possible to set a key whose length is greater than the maximumPreSharedKeyLength() ; in this case, only the first maximumPreSharedKeyLength() bytes will be actually sent to the server.

swap(other)#

Parameters:: other – QSslPreSharedKeyAuthenticator

Swaps the QSslPreSharedKeyAuthenticator object authenticator with this object. This operation is very fast and never fails.