不同的输出加密CryptoJS和Java代码

问题描述

我需要从客户端（JavaScript）加密肯定字符串并从服务器端（Java）解密，所以我找到了CryptoJS，我用mi Java Code的相同params /配置编写代码，但输出总是不同，你有什么想法或发生了什么？

I need to encrypt certainly string from client-side (JavaScript) and decrypt from server-side (Java), so I found CryptoJS and I write the code with the same params/configuration of mi Java Code but the output is always different, do you have any idea or what happen?

我正在使用 CBC与NoPadding

CryptoJS

<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('0123456789abcdef');
    var iv  = CryptoJS.enc.Hex.parse('fedcba9876543210');
    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

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 = "0123456789ABCDEF".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：

soldier

CryptoJS的输出：

Output from CryptoJS:

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

Java代码的输出：

Output from Java Code:

Encrypted: j6dSmg2lfjY2RpN91GNgNw==
Encrypted Hex: 6a3664536d67326c666a593252704e3931474e674e773d3d

加密的base64字符串具有相同的长度但不是十六进制。
如果我将CryptoJS的输出结果放在Java代码中，则解密不正确。

The base64 string encrypted has same length but not the hex.If I put the output result of CryptoJS in Java Code, the decryption is incorrect.

问候，

推荐答案

这里的一个问题是你使用64位密钥和iv。

One problem here is that you're using 64 bit keys and iv's.

CryptoJS支持AES-128，AES-192和AES-256，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 - 我肯定使用错误的密钥大小是未定义的行为。

CryptoJS supports AES-128, AES-192, and AES-256, and AFAIK Java supports AES-128, so you should probably be specifying 128 bit keys and IVs. That might be the whole problem - I'm sure using the wrong key size is undefined behavior.

至于输出长度的差异，22 base64字符是132位的信息，所以这是一个128位的答案（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。

As for the difference in output lengths, 22 base64 characters is 132 bits of information, so it's a 128 bit answer (There isn't a unique 128 bit length, 21 characters would have been too few). CryptoJS is outputting 32 hex characters, which is 128 bits of information. This seems correct.

Java代码输出48个十六进制字符，即192位信息。所以这是java代码错了。不过，我不确定为什么输出更多。

The Java code is outputting 48 hex characters which is 192 bits of information. So it's the java code that's wrong. I'm not sure why it's outputting more, though.

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