C#, Java, PHP, Python 和 Javascript 的 AES 加密解密實現

c#里面的AES加密解密

其中加密后以及解密后的字符串都能成功打印，但Console.WriteLine("=3==");之后的輸出就沒有了，最后輸出個線程返回值0，然后就沒有然后了。c#不懂，就不深究了，就已執行的部分，是符合要求了。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;

namespace test
{
    class Class1
    {
        static void Main(string[] args)
        {
            Console.WriteLine("I am comming");
            String source = "Test String";
            String encryptData = Class1.Encrypt(source, "1234567812345678", "1234567812345678");
            Console.WriteLine("=1==");
            Console.WriteLine(encryptData);
            Console.WriteLine("=2==");
            String decryptData = Class1.Decrypt("2fbwW9+8vPId2/foafZq6Q==", "1234567812345678", "1234567812345678");
            Console.WriteLine(decryptData);

            Console.WriteLine("=3==");

            Console.WriteLine("I will go out");
        }

        public static string Encrypt(string toEncrypt, string key, string iv)
        {
            byte[] keyArray = UTF8Encoding.UTF8.GetBytes(key);
            byte[] ivArray = UTF8Encoding.UTF8.GetBytes(iv);
            byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(toEncrypt);
            RijndaelManaged rDel = new RijndaelManaged();
            rDel.Key = keyArray;
            rDel.IV = ivArray;
            rDel.Mode = CipherMode.CBC;
            rDel.Padding = PaddingMode.Zeros;
            ICryptoTransform cTransform = rDel.CreateEncryptor();
            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
            return Convert.ToBase64String(resultArray, 0, resultArray.Length);
        }

        public static string Decrypt(string toDecrypt, string key, string iv)
        {
            byte[] keyArray = UTF8Encoding.UTF8.GetBytes(key);
            byte[] ivArray = UTF8Encoding.UTF8.GetBytes(iv);
            byte[] toEncryptArray = Convert.FromBase64String(toDecrypt);
            RijndaelManaged rDel = new RijndaelManaged();
            rDel.Key = keyArray;
            rDel.IV = ivArray;
            rDel.Mode = CipherMode.CBC;
            rDel.Padding = PaddingMode.Zeros;
            ICryptoTransform cTransform = rDel.CreateDecryptor();
            byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
            return UTF8Encoding.UTF8.GetString(resultArray);
        }
    }
}

php的AES加密解密

php代碼，php很多東西都是提供好的，直接用函數，但是php目前所知填充模式只有ZeroPadding，于是其他語言就只能跟著它來了：

<?php
$privateKey = "1234567812345678";
$iv     = "1234567812345678";
$data   = "Test String";

//加密
$encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $privateKey, $data, MCRYPT_MODE_CBC, $iv);
echo($encrypted);
echo '<br/>';
echo(base64_encode($encrypted));
echo '<br/>';

//解密
$encryptedData = base64_decode("2fbwW9+8vPId2/foafZq6Q==");
$decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $privateKey, $encryptedData, MCRYPT_MODE_CBC, $iv);
echo($decrypted);
?>

Javascript下aes加解密

需要在https://code.google.com/p/crypto-js/下載工具包

<script type="text/javascript" src="aes.js"></script>
<script type="text/javascript" src="pad-zeropadding.js"></script>

<script type="text/javascript">
    var data = "Test String";
    var key  = CryptoJS.enc.Latin1.parse('1234567812345678');
    var iv   = CryptoJS.enc.Latin1.parse('1234567812345678');

    //加密
    var encrypted = CryptoJS.AES.encrypt(data,key,{iv:iv,mode:CryptoJS.mode.CBC,padding:CryptoJS.pad.ZeroPadding});

    document.write(encrypted.ciphertext);
    document.write('<br/>');
    document.write(encrypted.key);
    document.write('<br/>');
    document.write(encrypted.iv);
    document.write('<br/>');
    document.write(encrypted.salt);
    document.write('<br/>');
    document.write(encrypted);
    document.write('<br/>');

    //解密
    var decrypted = CryptoJS.AES.decrypt(encrypted,key,{iv:iv,padding:CryptoJS.pad.ZeroPadding});
    console.log(decrypted.toString(CryptoJS.enc.Utf8));
</script>

python的AES加密解密

最后加一個python下的aes，需要安裝python Crypto：

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from Crypto.Cipher import AES
import base64
PADDING = '\0'
#PADDING = ' '
pad_it = lambda s: s+(16 - len(s)%16)*PADDING  
key = '1234567812345678'
iv = '1234567812345678'
source = 'Test String'
generator = AES.new(key, AES.MODE_CBC, iv)
crypt = generator.encrypt(pad_it(source))   
cryptedStr = base64.b64encode(crypt)
print cryptedStr
generator = AES.new(key, AES.MODE_CBC, iv)
recovery = generator.decrypt(crypt)
print recovery.rstrip(PADDING)

注意python下需要用'\0'來填充，如果是空格來填充，python加密得到的字符串會跟其他語言不同。另外注意generator在加密的 時候使用過，解密的時候需重新生成再解密，否則解密失敗。最后得到的字符串，在python控制臺看到尾部是多個NUL這樣的東西，要這樣 recovery.rstrip(PADDING)去除掉才是原始字符串。

可以看到aes加密的中間結果是byte[]類型，直接new String(byte[])會看不到有意義的中間結果，這里用的是base64，是因為各個語言都有這樣的支持。在同個語言內，也有bytesToHexString這樣的方式。

跨語言加解密的要求是：AES/CBC/ZeroPadding 128位模式，key和iv一樣，編碼統一用utf-8。不支持ZeroPadding的就用NoPadding.