PHP实现hmacsha1加密算法和hmacmd5加密算法

最近准备接入阿里云物联网套件,在接入mqtt协议的过程中需要用到hmacsha1算法加密　　

php的hmacsha1加密算法如下

/*
 * @使用HMAC-SHA1算法生成阿里云签名值
 *
 * @param $key  密钥
 * @param $str  源串
 *
 * @return 签名值
 */
 
function hmacsha1($str, $key)
{
    $signature = "";
    if (function_exists('hash_hmac'))
    {
        $signature = hash_hmac("sha1", $str, $key, true);
    }
    else
    {
        $blocksize	= 64;
        $hashfunc	= 'sha1';
        if (strlen($key) > $blocksize)
        {
            $key = pack('H*', $hashfunc($key));
        }
        $key	= str_pad($key,$blocksize,chr(0x00));
        $ipad	= str_repeat(chr(0x36),$blocksize);
        $opad	= str_repeat(chr(0x5c),$blocksize);
        $hmac 	= pack(
            'H*',$hashfunc(
                ($key^$opad).pack(
                    'H*',$hashfunc(
                        ($key^$ipad).$str
                    )
                )
            )
        );
        $signature ＝　$hmac;
    }
 
    return $signature;
}

阿里云还要求把签名转换成十六进制

在php中可以使用bin2hex函数把二进制内容转成十六进制

另附上hmacmd5加密算法

/**
 *
 * @param $key  密钥
 * @param $data 源串
 *
 * @return 签名值
 */
function   HmacMd5($data,$key){

         if (function_exists('hash_hmac')) {
                return hash_hmac('md5', $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);
        $b=64;
        if(strlen($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(ox5c));
         $k_ipad = $key^ $ipad;
         $k_opad = $key ^ $opad;
         return md5($k_opad.pack("H*",md5($k_ipad.$data)));
}

转载于:https://my.oschina.net/fage1151/blog/1544483