javaphpc#三种语言的AES加密互转

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最近做的项目中有一个领取优惠券的功能，项目是用php写得，不得不佩服，php自带的方法简洁而又方便好用。项目是为平台为其他公司发放优惠券，结果很囧的是接了三家优惠券公司，一家php，一家java，一家c#，下面就是整理出来的三种语言的加密解密方法：

简单介绍一下这里踩过的坑，最开始没有意识到不同的语言对加密实现的差别，服务端这里实现使用的ECB模式，PKCS7Padding填充模式，key没有位数限制(对比java中是有位数限制的)。java如果实现PKCS7Padding填充模式需要替换系统中的jar包,考虑到对方系统稳定性就放弃了PKCS7的实现转而去实现PKCS5,如果想实现PKCS7具体请参考http://www.cnblogs.com/haogj/p/4226178.html

php ECB模式，PKCS7Padding填充,块大小为256，代码如下(java、C#版本代码待补充)

    /**
     * 加密方法
     * @param string $str
     * @return string
     */
    public function encrypt($str)
    {
        //AES, 128 ECB模式加密数据
        $screct_key = $this->_app_key;
        $screct_key = base64_decode($screct_key);
        $str = trim($str);
        $str = $this->addPKCS7Padding($str);
        $iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND);
        $encrypt_str = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $screct_key, $str, MCRYPT_MODE_ECB, $iv);
        return base64_encode($encrypt_str);
    }

    /**
     * 解密方法
     * @param string $str
     * @return string
     */
    private function decrypt($str)
    {
        //AES, 128 ECB模式加密数据
        $screct_key = $this->_app_key;
        $str = base64_decode($str);
        $screct_key = base64_decode($screct_key);
        $iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND);
        $encrypt_str = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $screct_key, $str, MCRYPT_MODE_ECB, $iv);
        $encrypt_str = trim($encrypt_str);
        $encrypt_str = $this->stripPKSC7Padding($encrypt_str);
        return $encrypt_str;
    }

    /**
     * 填充算法
     * @param string $source
     * @return string
     */
    private function  addPKCS7Padding($source)
    {
        $source = trim($source);
        $block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
        $pad = $block - (strlen($source) % $block);
        if ($pad <= $block) {
            $char = chr($pad);
            $source .= str_repeat($char, $pad);
        }
        return $source;
    }

    /**
     * 移去填充算法
     * @param string $source
     * @return string
     */
    private function  stripPKSC7Padding($source)
    {
        $source = trim($source);
        $char = substr($source, -1);
        $num = ord($char);
        if ($num > 32) return $source;
        $source = substr($source, 0, -$num);
        return $source;
    }

ECB模式，PKCS5Padding填充。注意注意注意java只支持16位的key！！！

php 版本

   /*
     * 加密输入的字符串
     */
    private  function encrypt($input) {
        $size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
        $input = $this->pkcs5_pad($input, $size);
        $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, '');
        $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
        mcrypt_generic_init($td, $this->_app_key, $iv);
        $data = mcrypt_generic($td, $input);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);
        $data = base64_encode($data);
        return $data;
    }

    /*
     * 解密字符串
     */
    private  function decrypt($sStr) {
        $decrypted= mcrypt_decrypt(
            MCRYPT_RIJNDAEL_128,
            $this->_app_key,
            base64_decode($sStr),
            MCRYPT_MODE_ECB
        );

        $dec_s = strlen($decrypted);
        $padding = ord($decrypted[$dec_s-1]);
        $decrypted = substr($decrypted, 0, -$padding);
        return $decrypted;
    }

    /*
     * 填充模式
     */
    private static function pkcs5_pad ($text, $blocksize)
    {
        $pad = $blocksize - (strlen($text) % $blocksize);
        return $text . str_repeat(chr($pad), $pad);
    }

java版本

/**
	 * 加密源数据
	 * 
	 * @param input
	 * @return
	 */
	private String encrypt(String input) {
		byte[] crypted = null;
		try {
			SecretKeySpec skey = new SecretKeySpec(AppKey.getBytes(), "AES");
			Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
			cipher.init(Cipher.ENCRYPT_MODE, skey);
			crypted = cipher.doFinal(input.getBytes("UTF-8"));
		} catch (Exception e) {
			System.out.println(e.toString());
		}
		return new String(Base64.encodeBase64(crypted));
	}

	/**
	 * 解密源数据
	 * 
	 * @param input
	 * @return
	 */
	private String decrypt(String input) {
		byte[] output = null;
		try {
			SecretKeySpec skey = new SecretKeySpec(AppKey.getBytes(), "AES");
			Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
			cipher.init(Cipher.DECRYPT_MODE, skey);
			output = cipher.doFinal(Base64.decodeBase64(input));
		} catch (Exception e) {
			System.out.println(e.toString());
		}
		return new String(output);
	}

c#版本

        /// <summary>
        ///  AES 加密
        /// </summary>
        /// <param name="str"></param>
        /// <param name="key"></param>
        /// <returns></returns>
        public static string AesEncrypt(string str, string key)
        {
            if (string.IsNullOrEmpty(str)) return null;
            Byte[] toEncryptArray = Encoding.UTF8.GetBytes(str);

            System.Security.Cryptography.RijndaelManaged rm = new System.Security.Cryptography.RijndaelManaged
            {
                Key = Encoding.UTF8.GetBytes(key),
                Mode = System.Security.Cryptography.CipherMode.ECB,
                Padding = System.Security.Cryptography.PaddingMode.PKCS7,
            };

            System.Security.Cryptography.ICryptoTransform cTransform = rm.CreateEncryptor();
            Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

            return Convert.ToBase64String(resultArray, 0, resultArray.Length);
        }

        /// <summary>
        ///  AES 解密
        /// </summary>
        /// <param name="str"></param>
        /// <param name="key"></param>
        /// <returns></returns>
        public static string AesDecrypt(string str, string key)
        {
            if (string.IsNullOrEmpty(str)) return null;
            Byte[] toEncryptArray = Convert.FromBase64String(str);

            System.Security.Cryptography.RijndaelManaged rm = new System.Security.Cryptography.RijndaelManaged
            {
                Key = Encoding.UTF8.GetBytes(key),
                Mode = System.Security.Cryptography.CipherMode.ECB,
                Padding = System.Security.Cryptography.PaddingMode.PKCS7
            };

            System.Security.Cryptography.ICryptoTransform cTransform = rm.CreateDecryptor();
            Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

            return Encoding.UTF8.GetString(resultArray);
        }