QT HMAC-SHA1

以下是在QT中实现HMAC-SHA1的示例代码：

#include <QCryptographicHash>
#include <QMessageAuthenticationCode>

QString hmacSha1(const QString &key, const QString &data)
{
    QByteArray keyBytes = key.toUtf8();
    QByteArray dataBytes = data.toUtf8();

    QByteArray hmac = QMessageAuthenticationCode::hash(dataBytes, keyBytes, QCryptographicHash::Sha1);

    return hmac.toHex();
}

使用示例：

QString key = "myKey";
QString data = "myData";

QString hmac = hmacSha1(key, data);
qDebug() << "HMAC-SHA1: " << hmac;

相关问题

PKCS5_PBKDF2的QT实现

PKCS5_PBKDF2是一种密码学函数，用于从密码生成一个密钥，它使用一个伪随机函数，例如HMAC，来进行密钥派生。在QT中，可以通过QCryptographicHash类实现PKCS5_PBKDF2函数。具体实现可以参考如下代码：

#include <QCryptographicHash>

QByteArray pkcs5_pbkdf2(const QByteArray &password, const QByteArray &salt, int iterations, int keyLength)
{
    int hashLength = QCryptographicHash::hashLength(QCryptographicHash::Sha256);
    int blocks = (keyLength + hashLength - 1) / hashLength;

    QByteArray result;
    for (int i = 1; i <= blocks; ++i) {
        QByteArray block = salt;
        block.append(reinterpret_cast<const char*>(&i), sizeof(int));

        QByteArray u = QCryptographicHash::hash(block, QCryptographicHash::Sha256);
        QByteArray f = u;

        for (int j = 1; j < iterations; ++j) {
            u = QCryptographicHash::hash(u, QCryptographicHash::Sha256);
            for (int k = 0; k < f.length(); ++k) {
                f[k] = f.at(k) ^ u.at(k);
            }
        }

        result.append(f);
    }

    return result.left(keyLength);
}

该函数的参数分别为：密码password、盐值salt、迭代次数iterations和密钥长度keyLength。函数返回值为生成的密钥。