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PHP实现的增强性mhash函数,php实现mhash函数

今天使用php的加密函数mhash 的时候,报错: Fatal error : Call to undefined function mhash()

mhash是php的内置函数但是使用却报错..

一番研究总结两种方法:

1,导入php_mhash.dll扩展文件,除此之外还要导入 libmhash.dll (mhash 库的载入依赖这个文件) ,

在 Apache 的配置文件 Httpd.conf 中加载   LoadFile C:/php/libmhash.dll” 。

2,使用自定义的mhash增强函数。
复制代码 代码如下:
function hmac_md5($key, $data)
{
    if (extension_loaded('mhash'))
    {
        return bin2hex(mhash (MHASH_MD5, $data, $key));
    }

    $b = 64;
    if (strlen($key) > $b)
    {
        $key = pack('H*', md5($key));
    }
    $key  = str_pad($key, $b, chr(0x00));
    $ipad = str_pad('', $b, chr(0x36));
    $opad = str_pad('', $b, chr(0x5c));

    $k_ipad = $key ^ $ipad;
    $k_opad = $key ^ $opad;

    return md5($k_opad . pack('H*', md5($k_ipad . $data)));
}

hmac_md5 函数里的参数$key和$data对应mhash原有的3,2参数。

这两个方法都可以顺利的使用上php 的mhash 加密函数

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