Qt 实现 HMAC_SHA1 哈希算法

Qt哈希算法 hmacSha1

//Qt哈希算法 hmacSha1
#include <QCryptographicHash>
/*!
* \brief Qt hmacSha1 哈希算法
* \param key         加密需要的key
* \param baseString  需要加密的字符串
* \return QByteArray 加密后的数据内存中的ASCII码
*/
QByteArray 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);
/// 注意——>把字符串hashed转换为Hex，内存中的ASCII码arrayFromHexString
QByteArray arrayFromHexString = QByteArray::fromHex(hashed.toHex());
qDebug()<<"hmacSha1内存中的ASCII码 arrayFromHexString \n"<<arrayFromHexString.toHex();
return arrayFromHexString;
}