QCryptographicHash类使用

小何 • • Qt • 844 阅读

前言

最近项目中有个需求：判断一个编辑界面的数据是否被编辑过。可能大家一般想的都是直接等（如果数据量大了效率会降低）就是了或者设置标志位，但是今天学到一种新思路采用md5加密的方式。其实我印象中md5有两个作用，一般是密码用到md5加密，过了就是文件校验用md5。

正文如下

   QString pwd = QStringLiteral("此处省略一万字...");
    QString md5Value;
    QByteArray md5Byte = QCryptographicHash::hash(pwd.toUtf8(), QCryptographicHash::Md5);
    md5Value.append(md5Byte.toHex());
    qDebug() << __FUNCTION__ << __LINE__ << "  : " << md5Value;

 

可选参数

枚举 枚举值 描述
QCryptographicHash::Md4 0 Generate an MD4 hash sum
QCryptographicHash::Md5 1 Generate an MD5 hash sum
QCryptographicHash::Sha1 2 Generate an SHA-1 hash sum
QCryptographicHash::Sha224 3 Generate an SHA-224 hash sum (SHA-2). Introduced in Qt 5.0
QCryptographicHash::Sha256 4 Generate an SHA-256 hash sum (SHA-2). Introduced in Qt 5.0
QCryptographicHash::Sha384 5 Generate an SHA-384 hash sum (SHA-2). Introduced in Qt 5.0
QCryptographicHash::Sha512 6 Generate an SHA-512 hash sum (SHA-2). Introduced in Qt 5.0
QCryptographicHash::Sha3_224 RealSha3_224 Generate an SHA3-224 hash sum. Introduced in Qt 5.1
QCryptographicHash::Sha3_256 RealSha3_256 Generate an SHA3-256 hash sum. Introduced in Qt 5.1
QCryptographicHash::Sha3_384 RealSha3_384 Generate an SHA3-384 hash sum. Introduced in Qt 5.1
QCryptographicHash::Sha3_512 RealSha3_512 Generate an SHA3-512 hash sum. Introduced in Qt 5.1
QCryptographicHash::Keccak_224 7 Generate a Keccak-224 hash sum. Introduced in Qt 5.9.2
QCryptographicHash::Keccak_256 8 Generate a Keccak-256 hash sum. Introduced in Qt 5.9.2
QCryptographicHash::Keccak_384 9 Generate a Keccak-384 hash sum. Introduced in Qt 5.9.2
QCryptographicHash::Keccak_512 10 Generate a Keccak-512 hash sum. Introduced in Qt 5.9.2

 

版权声明：
作者：小何
链接：https://ligo100.cn/houduanjishu/qt/123.html
来源：小何博客
文章版权归作者所有，未经允许请勿转载。

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