2013-10-17 31 views
0

我需要从客户端(JavaScript)确定字符串进行加密并从服务器端(Java)进行解密,因此我找到了CryptoJS,并使用相同的参数/配置mi Java代码但输出总是不同的,你有什么想法或发生了什么?不同的输出加密CryptoJS和Java代码

我使用CBC与NoPadding

CryptoJS

http://jsfiddle.net/Soldier/gCHAG/

<script src="http://crypto-js.googlecode.com/svn/tags/3.1.2/build/rollups/aes.js"> 
</script> 
<script src="http://crypto-js.googlecode.com/svn/tags/3.1.2/build/components/pad-nopadding-min.js"></script> 
<script> 

    function padString(source) { 
     var paddingChar = ' '; 
     var size = 16; 
     var x = source.length % size; 
     var padLength = size - x; 

     for (var i = 0; i < padLength; i++) source += paddingChar; 

     return source; 
    } 

    var key = CryptoJS.enc.Hex.parse('abcdef'); 
    var iv = CryptoJS.enc.Hex.parse('fedcba'); 
    var message = "soldier"; 
    var padMsg = padString(message); 

    var encrypted = CryptoJS.AES.encrypt(padMsg, key, { iv: iv, padding: CryptoJS.pad.NoPadding, mode: CryptoJS.mode.CBC}); 

    console.log("Encrypted: "+encrypted); 
    console.log("Encrypted text: "+encrypted.ciphertext); 

</script> 

Java代码的

import java.security.Key; 
import javax.crypto.Cipher; 
import javax.crypto.spec.IvParameterSpec; 
import javax.crypto.spec.SecretKeySpec; 
import sun.misc.*; 

public class AesCipher { 

    private static final String algorithm = "AES/CBC/NoPadding"; 

    private static final byte[] keyValue = new byte[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; 
    private static final byte[] ivValue = new byte[] { 'f', 'e', 'd', 'c', 'b', 'a', '9', '8', '7', '6', '5', '4', '3', '2', '1', '0' }; 

    private static final IvParameterSpec ivspec = new IvParameterSpec(ivValue); 
    private static final SecretKeySpec keyspec = new SecretKeySpec(keyValue, "AES"); 

    final protected static char[] hexArray = "ABCDEF".toCharArray(); 

    public static String encrypt(String Data) throws Exception { 
     Cipher c = Cipher.getInstance(algorithm); 
     c.init(Cipher.ENCRYPT_MODE, keyspec, ivspec); 
     byte[] encVal = c.doFinal(Data.getBytes()); 
     String encryptedValue = new BASE64Encoder().encode(encVal); 
     return encryptedValue; 
    } 

    public static String decrypt(String encryptedData) throws Exception { 
     Cipher c = Cipher.getInstance(algorithm); 
     c.init(Cipher.DECRYPT_MODE, keyspec, ivspec); 
     byte[] decordedValue = new BASE64Decoder().decodeBuffer(encryptedData); 
     byte[] decValue = c.doFinal(decordedValue); 
     String decryptedValue = new String(decValue); 
     return decryptedValue; 
    } 

    public static String bytesToHex(byte[] bytes) { 
     char[] hexChars = new char[bytes.length * 2]; 
     int v; 
     for (int j = 0; j < bytes.length; j++) { 
      v = bytes[j] & 0xFF; 
      hexChars[j * 2] = hexArray[v >>> 4]; 
      hexChars[j * 2 + 1] = hexArray[v & 0x0F]; 
     } 
     return new String(hexChars); 
    } 

    private static String padString(String source) { 
     char paddingChar = ' '; 
     int size = 16; 
     int x = source.length() % size; 
     int padLength = size - x; 

     for (int i = 0; i < padLength; i++) 
     { 
      source += paddingChar; 
     } 
     return source; 
     } 

    public static void main(String[] args) throws Exception { 

     String password = "soldier"; 
     String passwordEnc = AesCipher.encrypt(padString(password)); 
     String passwordDec = AesCipher.decrypt(passwordEnc); 

     System.out.println("Plain Text : " + password); 
     System.out.println("Encrypted Text : " + passwordEnc); 
     System.out.println("Decrypted Text : " + passwordDec); 
    } 

} 

原始字符串:从CryptoJS

soldier 

输出:从Java代码

Encrypted: VNzZNKJTqfRbM7zO/M4cDQ== 
Encrypted Hex: 54dcd934a253a9f45b33bccefcce1c0d 

输出:

Encrypted: j6dSmg2lfjY2RpN91GNgNw== 
Encrypted Hex: 6a3664536d67326c666a593252704e3931474e674e773d3d 

加密基于64位字符串具有相同的长度,而不是十六进制。 如果我把CryptoJS的输出结果放在Java代码中,解密是不正确的。

Regards,

+0

您是否找到任何解决方案? –

回答

0

这里的一个问题是,您使用的是64位密钥和iv。 CryptoJS支持AES-128,AES-192和AES-256,而AFAIK Java支持AES-128,因此您应该指定128位密钥和IV。这可能是整个问题 - 我确定使用错误的密钥大小是未定义的行为。

至于输出长度的差异,22个base64字符是132位信息,所以它是128位答案(没有唯一的128位长度,21个字符太少)。 CryptoJS输出32个十六进制字符,即128位信息。这似乎是正确的。

Java代码正在输出48个十六进制字符,它是192位信息。所以这是错误的Java代码。不过,我不确定它为什么输出更多。