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怎么對接銀聯支付開始我是按照中國銀聯開發平臺的接口文檔對接后來發現不是
如圖是中國銀聯開發平臺unionpay ：

銀聯接口

chinapay和unionpay 是有區別的雖然都是銀聯旗下的都是接口文檔都是不一樣的.
下面介紹一下對接過程；
第一步，申請好之后他們會發送一個郵件給你，里面有網關公鑰，這個文件是需要對接中用到
第二步需要生成一個商戶的公鑰這個是比較麻煩的，不過在郵件附件中有文檔

接口文檔

5.6點是教程用ie瀏覽器安裝

控件安裝

安裝控件

安裝證書

選擇你生成的證書（多個就是最新的哪個）
登入申請證書導出證書（商戶私鑰，記住導出的密碼要記住后面要用到的）
https://merchant.chinapay.com/BIZSS/admin/loginpage.htm
文檔中有步驟照著來就可以
登入https://service.chinapay.com/OSIWeb/home/toHome.action
可以下載都demo文件
下面是公共函數的
public function _initialize() {
        header("Content-type:text/html;charset=utf-8");

        vendor('Chinapay.util.common',"",".php"); //導入加密核心文件夾
        vendor('Chinapay.util.SecssUtil',"",".class.php"); //導入加密核心文件夾
        vendor('Chinapay.util.Settings_INI',"",".php"); //導入加密核心文件夾
        vendor('Chinapay.util.Settings',"",".php"); //導入加密核心文件夾
        define(transResvered, "trans_");
        define(cardResvered, "card_");
        define(transResveredKey, "TranReserved");
        define(signatureField, "Signature");
        $this->securityPropFile='.'.."/ThinkPHP/Library/Vendor/Chinapay/config/security.properties"; //這個是放公鑰,私鑰文件位置信息
        //dump($this->securityPropFile);
        $this->PaySend = ."/Unionpay/PaySend";
$this->MerBgUrl ="http://www.yyishen.com/index.php/Home/Unionpay/pay_success";
       }

代碼塊

sign.file.password=yyshen2020
這個是你導出商戶私鑰的密碼下面是公鑰的地址

二、發送參數信息

     $paramArray=array (
               'MerId' => '',//商戶id
               'MerOrderNo' => $config['MerOrderNo'] ,//訂單號
               'OrderAmt' => $config['OrderAmt'],//訂單金額

               'TranDate' => date('Ymd'),
               'TranTime' => date('His'),
               'TimeStamp'=>time(),
               'TranType' => '0004',//交易類型
               'BusiType' =>'0001',
               'Version' => '20140728',//版本號
               'CurryNo' => 'CNY',
               'AccessType' =>'0',
               'CommodityMsg' => $order['goods_name'],//商戶信息
               'MerPageUrl' => $this->MerPageUrl,//回跳頁面，
               'MerBgUrl' => $this->MerBgUrl,//接受交易狀態
               'MerResv' => 'MerResv',
               'RemoteAddr'=>get_client_ip(),//ip
              );
            if ($paramArray['TranType'] && trim($paramArray['TranType']) != "") {
                $dispatchUrl =$this->PaySend;
            } else {
                $dispatchUrl = $this->PaySend;
            }
            $transResvedJson = array();
            $cardInfoJson = array();
            $sendMap = array();
            foreach ($paramArray as $key => $value) {
                if (isEmpty($value)) {
                    continue;
                }
                if (startWith($key, transResvered)) {

                    $key = substr($key, strlen(transResvered));
                    $transResvedJson[$key] = $value;
                } else
                    if (startWith($key, cardResvered)) {

                        $key = substr($key, strlen(cardResvered));
                        $cardInfoJson[$key] = $value;
                    } else {
                        $sendMap[$key] = $value;
                    }
            }
            $transResvedStr = null;
            $cardResvedStr = null;
            if (count($transResvedJson) > 0) {
                $transResvedStr = json_encode($transResvedJson);
            }
            if (count($cardInfoJson) > 0) {
                $cardResvedStr = json_encode($cardInfoJson);
            }

            $secssUtil = new \SecssUtil();

            if (! is_Empty($transResvedStr)) {
                $transResvedStr = $secssUtil->decryptData($transResvedStr);
                $sendMap[transResveredKey] = $transResvedStr;
            }
            if (! is_Empty($cardResvedStr)) {
                $cardResvedStr = $secssUtil->decryptData($cardResvedStr);
                $sendMap[cardResveredKey] = $cardResvedStr;
            }

            $securityPropFile =$this->securityPropFile;
            $secssUtil->init($securityPropFile);
            $secssUtil->sign($sendMap);
            //dump($secssUtil->sign($sendMap));
            $sendMap[signatureField] = $secssUtil->getSign();
            //dump($sendMap);
           // dump( $sendMap[signatureField]);
            $_SESSION = $sendMap;

            header("Location:" . $dispatchUrl);
        }

發送參數

             public function PaySend(){
               layout(false);
               $settings = new \Settings_INI();
               $settings->load($this->securityPropFile);
               //dump($settings->load($this->securityPropFile));exit;
               $pay_url = "https://payment.chinapay.com/CTITS/service/rest/page/nref/000000000017/0/0/0/0/0";
               $html = "<form id='payment' name='payment' action='{$pay_url}' method='POST' target='_blank'>";
               $params = "TranReserved;MerId;MerOrderNo;OrderAmt;CurryNo;TranDate;SplitMethod;BusiType;MerPageUrl;MerBgUrl;SplitType;MerSplitMsg;PayTimeOut;MerResv;Version;BankInstNo;CommodityMsg;Signature;AccessType;AcqCode;OrderExpiryTime;TranType;RemoteAddr;Referred;TranTime;TimeStamp;CardTranData";
               foreach ($_SESSION as $k =>$v) {
                if (strstr($params, $k)) {
                  $html .= "<input type='hidden' name = '" . $k . "' value ='" . $v . "'/>";
                }
               }
                 $html .= "<input type='submit' type='hidden' value='提交訂單' >";
                 $html .= "<script>document.forms['payment'].submit();</script>;
                    </script>";
             echo $html;
                 //dump($html);exit;
              // $this->display();

        }


整個過程就是Signature 生成簽名時候比較麻煩

代碼塊2