分享每一天-php加密HmacMD5算法[php版]

php加密HmacMD5算法[php版]

PHP 1695 0 创建时间：2022-06-28 10:52:53

HmacMD5

#### php加密HmacMD5算法[php版]

```php
/**
 * HmacMD5算法[php版]
 * @param $data
 * @param $key
 * @return string
 */
function HmacMd5($data,$key) {
    // RFC 2104 HMAC implementation for php.
    // Creates an md5 HMAC.
    // // Eliminates the need to install mhash to compute a HMAC
    // // Hacked by Lance Rushing(NOTE: Hacked means written)
    // //需要配置环境支持iconv，否则中文参数不能正常处理
    $key = iconv("GB2312","UTF-8",$key);
    $data = iconv("GB2312","UTF-8",$data);
    $b = 64;
    // byte length for md5
     if (strlen($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)));
}

/**
 * 基于MD5的加密算法HMAC
 *
 * @param String $data 预加密数据
 * @param String $key  密钥
 * @return String
 */
function hmac_md5($data, $key) {
    if (function_exists('hash_hmac')) {
        return hash_hmac('md5', $data, $key);
    }

$key = (strlen($key) > 64) ? pack('H32', 'md5') : str_pad($key, 64, chr(0));
    $ipad = substr($key,0, 64) ^ str_repeat(chr(0x36), 64);
    $opad = substr($key,0, 64) ^ str_repeat(chr(0x5C), 64);
    return md5($opad.pack('H32', md5($ipad.$data)));
}

```

php加密HmacMD5算法[php版]

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