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1、问题描述
在与C同事调试的时候发现，Java加密的文件，C语言解析不了，后面找了很多才找到解决方案。
2、操作方法
1、Java加密解密
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import org.junit.Test;
...
@Test
public void testCrossLanguageEncrypt() throws Exception{
System.out.println(encrypt());
System.out.println(desEncrypt());
}
public static String encrypt() throws Exception {
try {
String data = "Test String";
String key = "1234567812345678";
String iv = "1234567812345678";
Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
int blockSize = cipher.getBlockSize();
byte[] dataBytes = data.getBytes();
int plaintextLength = dataBytes.length;
if (plaintextLength % blockSize != 0) {
plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize));
}
byte[] plaintext = new byte[plaintextLength];
System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length);
SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());
cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
byte[] encrypted = cipher.doFinal(plaintext);
return new sun.misc.BASE64Encoder().encode(encrypted);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
public static String desEncrypt() throws Exception {
try
{
String data = "2fbwW9+8vPId2/foafZq6Q==";
String key = "1234567812345678";
String iv = "1234567812345678";
byte[] encrypted1 = new sun.misc.BASE64Decoder().decodeBuffer(data);
Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());
cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);
byte[] original = cipher.doFinal(encrypted1);
String originalString = new String(original);
return originalString;
}
catch (Exception e) {
e.printStackTrace();
return null;
}
}
2、C加密解密
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);
}
}
}
3、PHP加密解密
<?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);
?>
4、JS加密解密
<script type="text/javascript" src="aes.js"></script>
<script type="text/javascript" src="pad-zeropadding.js"></script>
导入文件，aes.js需要导入crypto-js压缩包中rollups文件夹下的那个aes.js文件，如果引入的是components文件夹下的aes.js是会报错的
<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>
5、python加密解密
#!/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'来填充，如果是空格来填充，python加密得到的字符串会跟其他语言不同。另外注意generator在加密的时候使用过，解密的时候需重新生成再解密，否则解密失败。最后得到的字符串，在python控制台看到尾部是多个NUL这样的东西，要这样recovery.rstrip(PADDING)去除掉才是原始字符串。
可以看到aes加密的中间结果是byte[]类型，直接new String(byte[])会看不到有意义的中间结果，这里用的是base64，是因为各个语言都有这样的支持。在同个语言内，也有bytesToHexString这样的方式。
跨语言加解密的要求是：AES/CBC/ZeroPadding 128位模式，key和iv一样，编码统一用utf-8。不支持ZeroPadding的就用NoPadding.