class QSslDiffieHellmanParameters

The QSslDiffieHellmanParameters class provides an interface for Diffie-Hellman parameters for servers. More…

Synopsis

Methods

• def __init__()

• def error()

• def errorString()

• def isEmpty()

• def isValid()

• def __ne__()

• def __eq__()

• def swap()

Static functions

• def defaultParameters()

• def fromEncoded()

Note

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Detailed Description

QSslDiffieHellmanParameters provides an interface for setting Diffie-Hellman parameters to servers based on QSslSocket .

See also

QSslSocket QSslCipher QSslConfiguration

class Error

Describes a QSslDiffieHellmanParameters error.

Constant	Description
QSslDiffieHellmanParameters.NoError	No error occurred.
QSslDiffieHellmanParameters.InvalidInputDataError	The given input data could not be used to construct a QSslDiffieHellmanParameters object.
QSslDiffieHellmanParameters.UnsafeParametersError	The Diffie-Hellman parameters are unsafe and should not be used.

__init__()

Constructs an empty QSslDiffieHellmanParameters instance.

If an empty QSslDiffieHellmanParameters instance is set on a QSslConfiguration object, Diffie-Hellman negotiation will be disabled.

See also

isValid() QSslConfiguration

__init__(other)

Parameters:

other – QSslDiffieHellmanParameters

Constructs an identical copy of other.

static defaultParameters()

Return type:

QSslDiffieHellmanParameters

Returns the default QSslDiffieHellmanParameters used by QSslSocket .

This is currently the 2048-bit MODP group from RFC 3526.

error()

Return type:

Error

Returns the error that caused the QSslDiffieHellmanParameters object to be invalid.

errorString()

Return type:

str

Returns a human-readable description of the error that caused the QSslDiffieHellmanParameters object to be invalid.

static fromEncoded(device[, format=QSsl.Pem])

Parameters:

• device – QIODevice

• format – EncodingFormat

Return type:

QSslDiffieHellmanParameters

Constructs a QSslDiffieHellmanParameters object by reading from device in either PEM or DER form as specified by encoding.

Use the isValid() method on the returned object to check whether the Diffie-Hellman parameters were valid and loaded correctly.

In particular, if device is None or not open for reading, an invalid object will be returned.

See also

isValid() QSslConfiguration

static fromEncoded(encoded[, format=QSsl.Pem])

Parameters:

• encoded – QByteArray

• format – EncodingFormat

Return type:

QSslDiffieHellmanParameters

Constructs a QSslDiffieHellmanParameters object using the byte array encoded in either PEM or DER form as specified by encoding.

Use the isValid() method on the returned object to check whether the Diffie-Hellman parameters were valid and loaded correctly.

See also

isValid() QSslConfiguration

isEmpty()

Return type:

bool

Returns true if this is a an empty QSslDiffieHellmanParameters instance.

Setting an empty QSslDiffieHellmanParameters instance on a QSslSocket -based server will disable Diffie-Hellman key exchange.

isValid()

Return type:

bool

Returns true if this is a valid QSslDiffieHellmanParameters ; otherwise false.

This method should be used after constructing a QSslDiffieHellmanParameters object to determine its validity.

If a QSslDiffieHellmanParameters object is not valid, you can use the error() method to determine what error prevented the object from being constructed.

See also

error()

__ne__(rhs)

Parameters:

rhs – QSslDiffieHellmanParameters

Return type:

bool

Returns true if lhs is not equal to rhs; otherwise returns false.

__eq__(rhs)

Parameters:

rhs – QSslDiffieHellmanParameters

Return type:

bool

Returns true if lhs is equal to rhs; otherwise returns false.

swap(other)

Parameters:

other – QSslDiffieHellmanParameters

Swaps this QSslDiffieHellmanParameters with other. This function is very fast and never fails.