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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