QSslDiffieHellmanParameters Class

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

Header: #include <QSslDiffieHellmanParameters>
qmake: QT += network
Since: Qt 5.8

This class was introduced in Qt 5.8.

Note: All functions in this class are reentrant.

Public Types

enum Error { NoError, InvalidInputDataError, UnsafeParametersError }

Public Functions

QSslDiffieHellmanParameters(QSslDiffieHellmanParameters &&other)
QSslDiffieHellmanParameters(const QSslDiffieHellmanParameters &other)
QSslDiffieHellmanParameters()
QSslDiffieHellmanParameters &operator=(QSslDiffieHellmanParameters &&other)
QSslDiffieHellmanParameters &operator=(const QSslDiffieHellmanParameters &other)
~QSslDiffieHellmanParameters()
QSslDiffieHellmanParameters::Error error() const
QString errorString() const
bool isEmpty() const
bool isValid() const
void swap(QSslDiffieHellmanParameters &other)

Static Public Members

QSslDiffieHellmanParameters defaultParameters()
QSslDiffieHellmanParameters fromEncoded(const QByteArray &encoded, QSsl::EncodingFormat encoding = QSsl::Pem)
QSslDiffieHellmanParameters fromEncoded(QIODevice *device, QSsl::EncodingFormat encoding = QSsl::Pem)
uint qHash(const QSslDiffieHellmanParameters &dhparam, uint seed = 0)
QDebug operator<<(QDebug debug, const QSslDiffieHellmanParameters &dhparam)
bool operator==(const QSslDiffieHellmanParameters &lhs, const QSslDiffieHellmanParameters &rhs)

Detailed Description

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

See also QSslSocket, QSslCipher, and QSslConfiguration.

Member Type Documentation

enum QSslDiffieHellmanParameters::Error

Describes a QSslDiffieHellmanParameters error.

ConstantValueDescription
QSslDiffieHellmanParameters::NoError0No error occurred.
QSslDiffieHellmanParameters::InvalidInputDataError1The given input data could not be used to construct a QSslDiffieHellmanParameters object.
QSslDiffieHellmanParameters::UnsafeParametersError2The Diffie-Hellman parameters are unsafe and should not be used.

Member Function Documentation

QSslDiffieHellmanParameters::QSslDiffieHellmanParameters(QSslDiffieHellmanParameters &&other)

Move-constructs from other.

Note: The moved-from object other is placed in a partially-formed state, in which the only valid operations are destruction and assignment of a new value.

QSslDiffieHellmanParameters::QSslDiffieHellmanParameters(const QSslDiffieHellmanParameters &other)

Constructs an identical copy of other.

QSslDiffieHellmanParameters::QSslDiffieHellmanParameters()

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() and QSslConfiguration.

QSslDiffieHellmanParameters &QSslDiffieHellmanParameters::operator=(QSslDiffieHellmanParameters &&other)

Move-assigns other to this QSslDiffieHellmanParameters instance.

Note: The moved-from object other is placed in a partially-formed state, in which the only valid operations are destruction and assignment of a new value.

QSslDiffieHellmanParameters &QSslDiffieHellmanParameters::operator=(const QSslDiffieHellmanParameters &other)

Copies the contents of other into this QSslDiffieHellmanParameters, making the two QSslDiffieHellmanParameters identical.

Returns a reference to this QSslDiffieHellmanParameters.

QSslDiffieHellmanParameters::~QSslDiffieHellmanParameters()

Destroys the QSslDiffieHellmanParameters object.

[static] QSslDiffieHellmanParameters QSslDiffieHellmanParameters::defaultParameters()

Returns the default QSslDiffieHellmanParameters used by QSslSocket.

This is currently the 1024-bit MODP group from RFC 2459, also known as the Second Oakley Group.

QSslDiffieHellmanParameters::Error QSslDiffieHellmanParameters::error() const

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

QString QSslDiffieHellmanParameters::errorString() const

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

[static] QSslDiffieHellmanParameters QSslDiffieHellmanParameters::fromEncoded(const QByteArray &encoded, QSsl::EncodingFormat encoding = QSsl::Pem)

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() and QSslConfiguration.

[static] QSslDiffieHellmanParameters QSslDiffieHellmanParameters::fromEncoded(QIODevice *device, QSsl::EncodingFormat encoding = QSsl::Pem)

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 nullptr or not open for reading, an invalid object will be returned.

See also isValid() and QSslConfiguration.

bool QSslDiffieHellmanParameters::isEmpty() const

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.

bool QSslDiffieHellmanParameters::isValid() const

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().

void QSslDiffieHellmanParameters::swap(QSslDiffieHellmanParameters &other)

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

Related Non-Members

uint QSslDiffieHellmanParameters::qHash(const QSslDiffieHellmanParameters &dhparam, uint seed = 0)

Returns an hash value for dhparam, using seed to seed the calculation.

This function was introduced in Qt 5.8.

QDebug QSslDiffieHellmanParameters::operator<<(QDebug debug, const QSslDiffieHellmanParameters &dhparam)

Writes the set of Diffie-Hellman parameters in dhparam into the debug object debug for debugging purposes.

The Diffie-Hellman parameters will be represented in Base64-encoded DER form.

This function was introduced in Qt 5.8.

See also Debugging Techniques.

bool QSslDiffieHellmanParameters::operator==(const QSslDiffieHellmanParameters &lhs, const QSslDiffieHellmanParameters &rhs)

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

This function was introduced in Qt 5.8.

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