- QString hmacSha1(QByteArray key, QByteArray baseString)
- {
- int blockSize = 64; // HMAC-SHA-1 block size, defined in SHA-1 standard
- if (key.length() > blockSize) { // if key is longer than block size (64), reduce key length with SHA-1 compression
- key = QCryptographicHash::hash(key, QCryptographicHash::Sha1);
- }
- QByteArray innerPadding(blockSize, char(0x36)); // initialize inner padding with char "6"
- QByteArray outerPadding(blockSize, char(0x5c)); // initialize outer padding with char "/"
- // ascii characters 0x36 ("6") and 0x5c ("/") are selected because they have large
- // Hamming distance (http://en.wikipedia.org/wiki/Hamming_distance)
- for (int i = 0; i < key.length(); i++) {
- innerPadding[i] = innerPadding[i] ^ key.at(i); // XOR operation between every byte in key and innerpadding, of key length
- outerPadding[i] = outerPadding[i] ^ key.at(i); // XOR operation between every byte in key and outerpadding, of key length
- }
- // result = hash ( outerPadding CONCAT hash ( innerPadding CONCAT baseString ) ).toBase64
- QByteArray total = outerPadding;
- QByteArray part = innerPadding;
- part.append(baseString);
- total.append(QCryptographicHash::hash(part, QCryptographicHash::Sha1));
- QByteArray hashed = QCryptographicHash::hash(total, QCryptographicHash::Sha1);
- return hashed.toBase64();
- }
- //该片段来自于http://www.codesnippet.cn/detail/281020136711.html
来源: http://www.codesnippet.cn/detail/281020136711.html