standard aes 138 ecb crypt

 <?php
 /**
- * 加密解密
+ * AES, 128 ECB模式加密数据
  */
 
 namespace WebPlugin;
 
 class Encryption {
 
-    // 密钥
-    private static $key = '123';
+    //密钥
+    private static $_secrect_key = 'yoho9646abcdefgh';
 
-    // 加密
-    public static function encrypt ($data)
-    {
-        $char = '';
-        $str = '';
-        $key    =   md5(self::$key);
-        $x      =   0;
-        $len    =   strlen($data);
-        $l      =   strlen($key);
-        for ($i = 0; $i < $len; $i++) {
-            if ($x == $l)
-            {
-                $x = 0;
-            }
-            $char .= $key{$x};
-            $x++;
-        }
-
-        for ($i = 0; $i < $len; $i++) {
-            $str .= chr(ord($data{$i}) + (ord($char{$i})) % 256);
-        }
-        return base64_encode($str);
+    /**
+     * 加密方法
+     * @param string $str
+     * @return string
+     */
+    public static function encrypt($str){
+        //AES, 128 ECB模式加密数据
+        $screct_key = self::$_secrect_key;
+        $str = trim($str);
+        $str = self::addPKCS7Padding($str);
+        $iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128,MCRYPT_MODE_ECB),MCRYPT_RAND);
+        $encrypt_str =  mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $screct_key, $str, MCRYPT_MODE_ECB, $iv);
+        return base64_encode($encrypt_str);
     }
 
-    //解密
-    public static function decrypt($data)
-    {
-        $char = '';
-        $str = '';
+    /**
+     * 解密方法
+     * @param string $str
+     * @return string
+     */
+    public static function decrypt($str){
+        //AES, 128 ECB模式加密数据
+        $screct_key = self::$_secrect_key;
+        $str = base64_decode($str);
+        $iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128,MCRYPT_MODE_ECB),MCRYPT_RAND);
+        $encrypt_str =  mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $screct_key, $str, MCRYPT_MODE_ECB, $iv);
+        $encrypt_str = trim($encrypt_str);
+        $encrypt_str = self::stripPKSC7Padding($encrypt_str);
+        return $encrypt_str;
 
-        $key = md5(self::$key);
-        $x = 0;
-        $data = base64_decode($data);
-        $len = strlen($data);
-        $l = strlen($key);
-        for ($i = 0; $i < $len; $i++) {
-            if ($x == $l)
-            {
-                $x = +0;
-            }
-            $char .= substr($key, $x, 1);
-            $x++;
-        }
-        for ($i = 0; $i < $len; $i++) {
-            if (ord(substr($data, $i, 1)) < ord(substr($char, $i, 1)))
-            {
-                $str .= chr((ord(substr($data, $i, 1)) + 256) - ord(substr($char, $i, 1)));
-            }
-            else
-            {
-                $str .= chr(ord(substr($data, $i, 1)) - ord(substr($char, $i, 1)));
-            }
+    }
+
+    /**
+     * 填充算法
+     * @param string $source
+     * @return string
+     */
+    private static function addPKCS7Padding($source){
+        $source = trim($source);
+        $block = mcrypt_get_block_size('rijndael-128', 'ecb');
+        $pad = $block - (strlen($source) % $block);
+        if ($pad <= $block) {
+            $char = chr($pad);
+            $source .= str_repeat($char, $pad);
         }
-        return $str;
+        return $source;
+    }
+    /**
+     * 移去填充算法
+     * @param string $source
+     * @return string
+     */
+    private static function stripPKSC7Padding($source){
+        $source = trim($source);
+        $char = substr($source, -1);
+        $num = ord($char);
+        if($num==62)return $source;
+        $source = substr($source,0,-$num);
+        return $source;
     }
 }
\ No newline at end of file