QByteArray key = "key";
    QByteArray message = "The quick brown fox jumps over the lazy dog";
    ...
    QMessageAuthenticationCode code(QCryptographicHash::Sha1);
    code.setKey(key);
    code.addData(message);
    code.result().toHex();      // returns "de7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9"

    QMessageAuthenticationCode::hash(message, key, QCryptographicHash::Sha1).toHex();

Member Function Documentation

QMessageAuthenticationCode::QMessageAuthenticationCode(QCryptographicHash::Algorithm method, const QByteArray &key = QByteArray())

Constructs an object that can be used to create a cryptographic hash from data using method method and key key.

QMessageAuthenticationCode::~QMessageAuthenticationCode()

Destroys the object.

void QMessageAuthenticationCode::addData(const char *data, int length)

Adds the first length chars of data to the message.

void QMessageAuthenticationCode::addData(const QByteArray &data)

This function overloads addData().

bool QMessageAuthenticationCode::addData(QIODevice *device)

Reads the data from the open QIODevice device until it ends and adds it to message. Returns true if reading was successful.

Note: device must be already opened.

[static] QByteArray QMessageAuthenticationCode::hash(const QByteArray &message, const QByteArray &key, QCryptographicHash::Algorithm method)

Returns the authentication code for the message message using the key key and the method method.

void QMessageAuthenticationCode::reset()

Resets message data. Calling this method doesn't affect the key.

QByteArray QMessageAuthenticationCode::result() const

Returns the final authentication code.

See also QByteArray::toHex().

void QMessageAuthenticationCode::setKey(const QByteArray &key)

Sets secret key. Calling this method automatically resets the object state.