JavaScript Chat项目的auth 出现 SIGNATURE_FAILED 错误。

Question

我用的chat js demo来尝试着做auth
但是我尝试好长时间之后都返回：[WebSocket] Fail connection by server: code=4102 reason=SIGNATURE_FAILED
我的关键代码如下：

    chat = new AVChatClient({
      appId: appid,
      peerId: $('#sender').val() || 'testuser' + Math.random(),
      watchingPeerIds: watching,
      auth: auth//当网站设置开启签名的时候需要
    });

我已经开启了auth函数

  function auth(peerId, watchingPeers) {
    return new Promise(function(resolve, reject) {
      $.post('http://127.0.0.1/js-chat-sdk-samples/sign.php', {
        self_id: peerId,
        watch_ids: watchingPeers.join(':')
      }).success(function(data) {
        data = eval('(' + data + ')');
        resolve({
          n: data.nonce,
          t: data.timestamp,
          s: data.signature,
          watchingPeerIds: data.watch_ids.split(':')
        });
      }).error(function(err) {
        reject(err);
      })
    })

  }

数据已经正确的进入到了php当中

$peer = $_POST['self_id'];
     $wi = $_POST['watch_ids'];
     $nonce = generate_Random_string(5);
     $tmp=strtotime("-8 hour");//时间我检查了，确实是比北京时间提前8小时
     $return["nonce"]=$nonce;
     $return["timestamp"]=$tmp;         
     $return["signature"]=getSignature("i468qlm1fb110m02439xpqsa7sm0bqn6iezbmtyjm2tje0nc:$peer:$wi:$tmp:$nonce",我的masterkey);
     $return["watch_ids"]=$wi;

程序返回类似：
{"nonce":"ZArK4","timestamp":1414137902,"signature":"5MIZyY4wXsK9Ka\/FvTXLnSsq5fI=","watch_ids":"2"}

我在php服务器上实现的Signature 工厂函数：

    function getSignature($str, $key) {
        $signature = "";
        if (function_exists('hash_hmac')) {
            $signature = base64_encode(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
                                    )
                            )
                    )
            );
            $signature = base64_encode($hmac);
        }
        return $signature;
    }
    echo json_encode($return);

随机字符串函数实现：

    function generate_Random_string( $length = 8 ) {  
        $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";  //!@#$%^&*()-_ []{}<>~`+=,.;:/?|
        $password = "";  
        for ( $i = 0; $i < $length; $i++ )  
        {  
            $password .= $chars[ mt_rand(0, strlen($chars) - 1) ];  
        }  
        return $password;  
    } 

请各位大大帮我排查一下故障的位置。小弟感激不尽！

Answer 1

初步看首先是签名算法最后不需要base64，而是应该to hex string，你可以更新一下看看还有没有问题