/*!
Returns a cryptographic hash value generated from the given binary or
text data \a data with \a key using \a method.
*/
QByteArray TCryptMac::mac(const QByteArray &data, const QByteArray &key, Algorithm method)
{
QByteArray tk = (key.length() > 64) ? QCryptographicHash::hash(key, (QCryptographicHash::Algorithm)method) : key;
QByteArray k_ipad(64, '\0');
k_ipad.replace(0, tk.length(), tk);
QByteArray k_opad = k_ipad;
// XOR key with ipad and opad values
for (int i = 0; i < 64; ++i) {
k_ipad[i] = k_ipad[i] ^ 0x36;
k_opad[i] = k_opad[i] ^ 0x5c;
}
k_ipad.append(data);
QByteArray hash = QCryptographicHash::hash(k_ipad, (QCryptographicHash::Algorithm)method);
k_opad.append(hash);
return QCryptographicHash::hash(k_opad, (QCryptographicHash::Algorithm)method);
}
/*!
Returns a cryptographic hash value generated from the given binary or
text data \a data with \a key using \a method.
*/
QByteArray TCryptMac::hash(const QByteArray &data, const QByteArray &key, Algorithm method)
{
#if QT_VERSION < 0x050100
int blockSize = blockSizeHash()->value(method);
QByteArray tk = (key.length() > blockSize) ? QCryptographicHash::hash(key, (QCryptographicHash::Algorithm)method) : key;
QByteArray k_ipad(blockSize, '\0');
k_ipad.replace(0, tk.length(), tk);
QByteArray k_opad = k_ipad;
// XOR key with ipad and opad values
for (int i = 0; i < blockSize; ++i) {
k_ipad[i] = k_ipad[i] ^ 0x36;
k_opad[i] = k_opad[i] ^ 0x5c;
}
k_ipad.append(data);
QByteArray hash = QCryptographicHash::hash(k_ipad, (QCryptographicHash::Algorithm)method);
k_opad.append(hash);
return QCryptographicHash::hash(k_opad, (QCryptographicHash::Algorithm)method);
#else
return QMessageAuthenticationCode::hash(data, key, (QCryptographicHash::Algorithm)method);
#endif
}
