QMessageAuthenticationCode Class▲
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Header: QMessageAuthenticationCode
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Since: Qt 5.1
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qmake: QT += core
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Group: QMessageAuthenticationCode is part of tools
Detailed Description▲
QMessageAuthenticationCode supports all cryptographic hashes which are supported by QCryptographicHash.
To generate message authentication code, pass hash algorithm QCryptographicHash::Algorithm to constructor, then set key and message by setKey() and addData() functions. Result can be acquired by result() function.
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"Alternatively, this effect can be achieved by providing message, key and method to hash() method.
QMessageAuthenticationCode::hash(message, key, QCryptographicHash::Sha1).toHex();See Also▲
See also QCryptographicHash
Member Function Documentation▲
[explicit] 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.
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▲
void QMessageAuthenticationCode::setKey(const QByteArray &key)▲
Sets secret key. Calling this method automatically resets the object state.