微信开放平台获取component_verify_ticket - LazyCat_Ky

官方文档说明： 

在公众号第三方平台创建审核通过后，微信服务器会向其“授权事件接收URL”每隔10分钟定时推送component_verify_ticket。第三方平台方在收到ticket推送后也需进行解密（详细请见【消息加解密接入指引】），接收到后必须直接返回字符串success。

 

第一步是实例化微信提供的类 WXBizMsgCrypt ，传入开发平台的参数。

<span style="font-size: 14px;"><span style="color: #800080;">$pc</span> = <span style="color: #0000ff;">new</span> WXBizMsgCrypt(WxPayConfig::Token, WxPayConfig::EncodingAesKey, WxPayConfig::open_AppID);</span>

微信开放平台获取component_verify_ticket时，除了通过GET获取 timestamp  nonce  encrypt_type msg_sign四个参数外 还需要通过 file_get_contents('php://input') 获取 postdata加密的参数（encryptMsg）。

获取到的 $encryptMsg 是Xml格式的是数据 需要提取出其中的 Encrypt 节点下的数据 如下：

<span style="font-size: 14px;"><span style="color: #008080;">1</span> <span style="color: #800080;">$xml_tree</span> = <span style="color: #0000ff;">new</span><span style="color: #000000;"> DOMDocument();
</span><span style="color: #008080;">2</span> <span style="color: #800080;">$xml_tree</span>->loadXML(<span style="color: #800080;">$encryptMsg</span><span style="color: #000000;">);
</span><span style="color: #008080;">3</span> <span style="color: #800080;">$array_e</span> = <span style="color: #800080;">$xml_tree</span>->getElementsByTagName('Encrypt'<span style="color: #000000;">);
</span><span style="color: #008080;">4</span> <span style="color: #800080;">$encrypt</span> = <span style="color: #800080;">$array_e</span>->item(0)->nodeValue;</span>

 接下来需要将获取到的密文代入 另一段Xml中通过微信提供的 WXBizMsgCrypt 中的 decryptMsg 函数进行解密 和 通过sha1计算签名（因为 微信提供的 decryptMsg 函数中 要求 $encrypt是 Xml 格式 然后又再次提取 微信提供的做法）

<span style="color: #008080;">1</span> <span style="color: #800080;">$format</span> = "<xml><tousername></tousername><encrypt></encrypt></xml>"<span style="color: #000000;">;</span>
<span style="color: #008080;">2</span> <span style="color: #800080;">$from_xml</span> = <span style="color: #008080;">sprintf</span>(<span style="color: #800080;">$format</span>, <span style="color: #800080;">$encrypt</span>);

这是就可以调用 decryptMsg 函数进行解密了

<span style="font-size: 14px;"><span style="color: #008080;"> 1</span> <span style="color: #800080;">$msg</span> = ''<span style="color: #000000;">;
</span><span style="color: #008080;"> 2</span> 
<span style="color: #008080;"> 3</span> <span style="color: #800080;">$errCode</span> = <span style="color: #800080;">$pc</span>->decryptMsg(<span style="color: #800080;">$msg_sign</span>, <span style="color: #800080;">$timeStamp</span>, <span style="color: #800080;">$nonce</span>, <span style="color: #800080;">$from_xml</span>, <span style="color: #800080;">$msg</span><span style="color: #000000;">);
</span><span style="color: #008080;"> 4</span> 
<span style="color: #008080;"> 5</span> <span style="color: #0000ff;">if</span> (<span style="color: #800080;">$errCode</span> == 0<span style="color: #000000;">) {
</span><span style="color: #008080;"> 6</span> <span style="color: #008000;">//</span><span style="color: #008000;">由于返回的也是Xml格式的数据 所以这里再次提取ComponentVerifyTicket节点中的内容</span>
<span style="color: #008080;"> 7</span> <span style="color: #800080;">$xml</span> = <span style="color: #0000ff;">new</span><span style="color: #000000;"> DOMDocument();
</span><span style="color: #008080;"> 8</span> <span style="color: #800080;">$xml</span>->loadXML(<span style="color: #800080;">$msg</span><span style="color: #000000;">);
</span><span style="color: #008080;"> 9</span> <span style="color: #800080;">$array_e</span> = <span style="color: #800080;">$xml</span>->getElementsByTagName('ComponentVerifyTicket'<span style="color: #000000;">);
</span><span style="color: #008080;">10</span> <span style="color: #800080;">$component_verify_ticket</span> = <span style="color: #800080;">$array_e</span>->item(0)-><span style="color: #000000;">nodeValue;
</span><span style="color: #008080;">11</span> <span style="color: #008000;">//</span><span style="color: #008000;">获取到了$component_verify_ticket后就可以进行写入数据存储了</span>
<span style="color: #008080;">12</span> <span style="color: #0000ff;">echo</span> "success"<span style="color: #000000;">;
</span><span style="color: #008080;">13</span> }<span style="color: #0000ff;">else</span><span style="color: #000000;">{
</span><span style="color: #008080;">14</span> <span style="color: #0000ff;">echo</span> <span style="color: #800080;">$errCode</span><span style="color: #000000;">;
</span><span style="color: #008080;">15</span> }</span>

到此就已经获取到了component_verify_ticket了。

全部代码：

<span style="color: #0000ff;">require_once ("wxBizMsgCrypt.php");<br>public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> index()
    {    

        </span><span style="color: #800080;">$timeStamp</span>    =<span style="color: #800080;">$_GET</span>['timestamp'<span style="color: #000000;">];
        </span><span style="color: #800080;">$nonce</span>        =<span style="color: #800080;">$_GET</span>['nonce'<span style="color: #000000;">];
        </span><span style="color: #800080;">$encrypt_type</span> =<span style="color: #800080;">$_GET</span>['encrypt_type'<span style="color: #000000;">];
        </span><span style="color: #800080;">$msg_sign</span>     =<span style="color: #800080;">$_GET</span>['msg_signature'<span style="color: #000000;">];
        </span><span style="color: #800080;">$encryptMsg</span>   =<span style="color: #008080;">file_get_contents</span>('php://input'<span style="color: #000000;">);
        
        </span><span style="color: #800080;">$result</span> = <span style="color: #800080;">$this</span>->getVerify_Ticket(<span style="color: #800080;">$timeStamp</span>,<span style="color: #800080;">$nonce</span>,<span style="color: #800080;">$encrypt_type</span>,<span style="color: #800080;">$msg_sign</span>,<span style="color: #800080;">$encryptMsg</span><span style="color: #000000;">);

        </span><span style="color: #0000ff;">if</span>(<span style="color: #800080;">$result</span><span style="color: #000000;">){
            </span><span style="color: #0000ff;">echo</span> "success"<span style="color: #000000;">;
        }

    }


 </span><span style="color: #008000;">//</span><span style="color: #008000;">获取component_verify_ticket</span>
 <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span> getVerify_Ticket(<span style="color: #800080;">$timeStamp</span>,<span style="color: #800080;">$nonce</span>,<span style="color: #800080;">$encrypt_type</span>,<span style="color: #800080;">$msg_sign</span>,<span style="color: #800080;">$encryptMsg</span><span style="color: #000000;">){

        </span><span style="color: #800080;">$pc</span> = <span style="color: #0000ff;">new</span> WXBizMsgCrypt(WxPayConfig::Token, WxPayConfig::EncodingAesKey, WxPayConfig::<span style="color: #000000;">open_AppID);

        </span><span style="color: #800080;">$xml_tree</span> = <span style="color: #0000ff;">new</span><span style="color: #000000;"> DOMDocument();
        </span><span style="color: #800080;">$xml_tree</span>->loadXML(<span style="color: #800080;">$encryptMsg</span><span style="color: #000000;">);
        </span><span style="color: #800080;">$array_e</span> = <span style="color: #800080;">$xml_tree</span>->getElementsByTagName('Encrypt'<span style="color: #000000;">);
        </span><span style="color: #800080;">$encrypt</span> = <span style="color: #800080;">$array_e</span>->item(0)-><span style="color: #000000;">nodeValue;

        </span><span style="color: #800080;">$format</span> = "<xml><tousername></tousername><encrypt></encrypt></xml>"<span style="color: #000000;">;

        </span><span style="color: #800080;">$from_xml</span> = <span style="color: #008080;">sprintf</span>(<span style="color: #800080;">$format</span>, <span style="color: #800080;">$encrypt</span><span style="color: #000000;">);

        </span><span style="color: #800080;">$msg</span> = ''<span style="color: #000000;">;

        </span><span style="color: #800080;">$errCode</span> = <span style="color: #800080;">$pc</span>->decryptMsg(<span style="color: #800080;">$msg_sign</span>, <span style="color: #800080;">$timeStamp</span>, <span style="color: #800080;">$nonce</span>, <span style="color: #800080;">$from_xml</span>, <span style="color: #800080;">$msg</span><span style="color: #000000;">);

        </span><span style="color: #0000ff;">if</span> (<span style="color: #800080;">$errCode</span> == 0<span style="color: #000000;">) {

            </span><span style="color: #800080;">$xml</span> = <span style="color: #0000ff;">new</span><span style="color: #000000;"> DOMDocument();
            </span><span style="color: #800080;">$xml</span>->loadXML(<span style="color: #800080;">$msg</span><span style="color: #000000;">);
            </span><span style="color: #800080;">$array_e</span> = <span style="color: #800080;">$xml</span>->getElementsByTagName('ComponentVerifyTicket'<span style="color: #000000;">);

            </span><span style="color: #800080;">$component_verify_ticket</span> = <span style="color: #800080;">$array_e</span>->item(0)-><span style="color: #000000;">nodeValue;
            DB</span>::getDB()->delete("wechat_verifyticket",'uptime!=1'<span style="color: #000000;">);
            DB</span>::getDB()->insert("wechat_verifyticket",<span style="color: #0000ff;">array</span><span style="color: #000000;">(
                </span>'component_verify_ticket'    => <span style="color: #800080;">$component_verify_ticket</span>,
                'uptime'                    => <span style="color: #008080;">time</span><span style="color: #000000;">()));

            </span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">true</span><span style="color: #000000;">;
        }</span><span style="color: #0000ff;">else</span><span style="color: #000000;">{
            DB</span>::getDB()->delete("wechat_verifyticket",'uptime!=1'<span style="color: #000000;">);
            DB</span>::getDB()->insert("wechat_verifyticket",<span style="color: #0000ff;">array</span><span style="color: #000000;">(
                </span>'component_verify_ticket'    => <span style="color: #800080;">$errCode</span>,
                'uptime'                    => <span style="color: #008080;">time</span><span style="color: #000000;">()));
            </span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">false</span><span style="color: #000000;">;
        }

    }</span>