添加微信小程序代码

Author: lishipeng

src/WxSmallApp.php

@@ -0,0 +1,55 @@
+<?php
+namespace lspbupt\wechat;
+use \Yii;
+use yii\helpers\ArrayHelper;
+class WxSmallApp extends \lspbupt\curl\CurlHttp
+{
+    public $appid = "";
+    public $appsecret = "";
+    public $host = "api.weixin.qq.com";
+    public $protocol = "https";
+
+    public function jscode2session($js_code, $grant_type = "authorization_code")
+    {
+        return $this->setGet()->httpExec("/sns/jscode2session", [
+            'appid' => $this->appid,
+            'secret' => $this->appsecret,
+            'js_code' => $js_code,
+            'grant_type' => $grant_type,
+        ]);
+    }
+
+    public function checkSign($sessionKey, $rawData, $sign)
+    {
+        $checkSign = sha1($rawData.$sessionKey);
+        return $sign == $checkSign;
+    }
+
+    public function decrypt($sessionKey, $encryptedData, $iv, &$data)
+    {
+        if (strlen($sessionKey) != 24) {
+            return "AESKEY不正确";
+        }
+        $aesKey=base64_decode($sessionKey);
+
+        if (strlen($iv) != 24) {
+            return "iv不正确";
+        }
+        $aesIV=base64_decode($iv);
+
+        $aesCipher=base64_decode($encryptedData);
+
+        $result=openssl_decrypt( $aesCipher, "AES-128-CBC", $aesKey, 1, $aesIV);
+
+        $data=json_decode($result, true);
+        if(empty($data)) {
+            return "数据不正确";
+        }
+        $appid = ArrayHelper::getValue($data, "watermark.appid", "");
+        if( $appid != $this->appid ) {
+            return "appid不正确";
+        }
+        return false;
+    } 
+
+}