123

 <?php
 <?php
-
-namespace lib;
-
+namespace wx;
+use wx\ErrorCode;
 class WXBizDataCrypt
 class WXBizDataCrypt
 {
 {
-
     private $appid;
     private $appid;
     private $sessionKey;
     private $sessionKey;
 
 
@@ -13,9 +11,8 @@ class WXBizDataCrypt
      * @param $sessionKey string 用户在小程序登录后获取的会话密钥
      * @param $sessionKey string 用户在小程序登录后获取的会话密钥
      * @param $appid string 小程序的appid
      * @param $appid string 小程序的appid
      */
      */
-    public function __construct($appid, $sessionKey)
+    public function __construct( $appid, $sessionKey)
     {
     {
-
         $this->sessionKey = $sessionKey;
         $this->sessionKey = $sessionKey;
         $this->appid = $appid;
         $this->appid = $appid;
     }
     }
@@ -30,190 +27,33 @@ class WXBizDataCrypt
      * @return int 成功0，失败返回对应的错误码
      * @return int 成功0，失败返回对应的错误码
      */
      */
     public function decryptData( $encryptedData, $iv, &$data )
     public function decryptData( $encryptedData, $iv, &$data )
-
     {
     {
-
         if (strlen($this->sessionKey) != 24) {
         if (strlen($this->sessionKey) != 24) {
-
             return ErrorCode::$IllegalAesKey;
             return ErrorCode::$IllegalAesKey;
-
         }
         }
-
         $aesKey=base64_decode($this->sessionKey);
         $aesKey=base64_decode($this->sessionKey);
 
 
-        if (strlen($iv) != 24) {
 
 
+        if (strlen($iv) != 24) {
             return ErrorCode::$IllegalIv;
             return ErrorCode::$IllegalIv;
-
         }
         }
-
         $aesIV=base64_decode($iv);
         $aesIV=base64_decode($iv);
 
 
-// $aesCipher=base64_decode($encryptedData);
-
-        $aesCipher=$encryptedData;
-
-        $pc = new Prpcrypt($aesKey);
-
-        $result = $pc->decrypt($aesCipher,$aesIV);
-
-        var_dump($result);
-
-        if ($result[0] != 0) {
-
-            return $result[0];
-
-        }
-
-        $dataObj=json_decode( $result[1] );
+        $aesCipher=base64_decode($encryptedData);
 
 
-        if( $dataObj == NULL )
+        $result=openssl_decrypt( $aesCipher, "AES-128-CBC", $aesKey, 1, $aesIV);
 
 
+        $dataObj=json_decode( $result );
+        if( $dataObj  == NULL )
         {
         {
-
-            return ErrorCode::$IllegalBuffer.'--';
-
+            return ErrorCode::$IllegalBuffer;
         }
         }
-
         if( $dataObj->watermark->appid != $this->appid )
         if( $dataObj->watermark->appid != $this->appid )
-
         {
         {
-
-            return ErrorCode::$IllegalBuffer.';;';
-
+            return ErrorCode::$IllegalBuffer;
         }
         }
-
-        $data = $result[1];
-
+        $data = $result;
         return ErrorCode::$OK;
         return ErrorCode::$OK;
-
     }
     }
 
 
-}
-
-/**
- * PKCS7Encoder class
- *
- * 提供基于PKCS7算法的加解密接口.
- */
-class PKCS7Encoder
-{
-    public static $block_size = 16;
-
-    /**
-     * 对需要加密的明文进行填充补位
-     * @param $text 需要进行填充补位操作的明文
-     * @return 补齐明文字符串
-     */
-    function encode($text)
-    {
-        $block_size = PKCS7Encoder::$block_size;
-        $text_length = strlen($text);
-        //计算需要填充的位数
-        $amount_to_pad = PKCS7Encoder::$block_size - ($text_length % PKCS7Encoder::$block_size);
-        if ($amount_to_pad == 0) {
-            $amount_to_pad = PKCS7Encoder::block_size;
-        }
-        //获得补位所用的字符
-        $pad_chr = chr($amount_to_pad);
-        $tmp = "";
-        for ($index = 0; $index < $amount_to_pad; $index++) {
-            $tmp .= $pad_chr;
-        }
-        return $text . $tmp;
-    }
-
-    /**
-     * 对解密后的明文进行补位删除
-     * @param decrypted 解密后的明文
-     * @return 删除填充补位后的明文
-     */
-    function decode($text)
-    {
-
-        $pad = ord(substr($text, -1));
-        if ($pad < 1 || $pad > 32) {
-            $pad = 0;
-        }
-        return substr($text, 0, (strlen($text) - $pad));
-    }
-
-}
-
-/**
- * Prpcrypt class
- *
- *
- */
-class Prpcrypt
-{
-    public $key;
-
-    function __construct($k)
-    {
-        $this->key = $k;
-    }
-
-    /**
-     * 对密文进行解密
-     * @param string $aesCipher 需要解密的密文
-     * @param string $aesIV 解密的初始向量
-     * @return string 解密得到的明文
-     */
-    public function decrypt( $aesCipher, $aesIV )
-
-    {
-
-        try {
-
-// $module = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
-
-// mcrypt_generic_init($module, $this->key, $aesIV);
-
-// //解密
-
-// $decrypted = mdecrypt_generic($module, $aesCipher);
-
-// mcrypt_generic_deinit($module);
-
-// mcrypt_module_close($module);
-
-            $decrypted = openssl_decrypt($aesCipher,'AES-128-CBC',$this->key,OPENSSL_ZERO_PADDING,$aesIV);
-
- var_dump($decrypted);
-
-        } catch (Exception $e) {
-
-            return array(ErrorCode::$IllegalBuffer, null);
-
-        }
-
-        try {
-
-//去除补位字符
-
-            $pkc_encoder = new PKCS7Encoder;
-
-            $result = $pkc_encoder->decode($decrypted);
-
-        } catch (Exception $e) {
-
-//print $e;
-
-            return array(ErrorCode::$IllegalBuffer, null);
-
-        }
-
-        return array(0, $result);
-
-    }
-}
-
-class ErrorCode
-{
-    public static $OK = 0;
-    public static $IllegalAesKey = -41001;
-    public static $IllegalIv = -41002;
-    public static $IllegalBuffer = -41003;
-    public static $DecodeBase64Error = -41004;
 }
 }