Question

加密/解密在跨平台上不起作用。

我使用此链接使用代号为one的充气城堡AES密码加密/解密文本。

AES Encryption/Decryption with Bouncycastle Example in J2ME

从服务器端（.net），我使用此链接实现相同的方法。

http://zenu.wordpress.com/2011/09/21/aes-128bit-cross-platform-java-and-c-encryption-compatibility/

现在我没有收到任何错误，但是从代号加密不会在服务器端完全解密，反之亦然。

任何人请帮我解决这个问题。

来自Codename的代码：

import org.bouncycastle.crypto.CipherParameters;
import org.bouncycastle.crypto.CryptoException;
import org.bouncycastle.crypto.engines.AESEngine;
import org.bouncycastle.crypto.modes.CBCBlockCipher;
import org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher;
import org.bouncycastle.crypto.params.KeyParameter;
import org.bouncycastle.crypto.params.ParametersWithIV;
import org.bouncycastle.util.encoders.Base64;


public class Test
{
    private static PaddedBufferedBlockCipher cipher = null;
    public static void main(String[] args)
    {
        try
        {
            byte key[] = "MAKV2SPBNI992122".getBytes("UTF-8");
            byte[] iv = new byte[16];

            PaddedBufferedBlockCipher cipher = new PaddedBufferedBlockCipher(
                    new CBCBlockCipher(
                    new AESEngine()) );

            //Encryption
            String plainText = "Hello How are you !2#&*()% 123456@";
            byte[] plainData = plainText.getBytes("UTF-8");
            KeyParameter keyParam = new KeyParameter(key);
            CipherParameters ivAndKey = new ParametersWithIV(keyParam, iv);
            cipher.init(true, ivAndKey);
            byte[] ciptherBytes = cipherData(plainData); //48
            String cipherText = new String(Base64.encode(ciptherBytes), "UTF-8");//FileUtil.getStringFromByteArray(Base64.encode(ciptherBytes));


            System.out.println("encrypted >> "+cipherText);
            //Decryption

            byte[] cipherData = Base64.decode(cipherText);
            ivAndKey = new ParametersWithIV(keyParam, iv);
            cipher.init(false, ivAndKey);
            plainText = new String(cipherData(cipherData), "UTF-8");//FileUtil.getStringFromByteArray(cipherData(cipherData));

            System.out.println("decrypted >> "+plainText);


        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }
    private static byte[] cipherData(byte[] data)
            throws CryptoException
    {
        int minSize = cipher.getOutputSize(data.length);
        byte[] outBuf = new byte[minSize];
        int length1 = cipher.processBytes(data, 0, data.length, outBuf, 0);
        int length2 = cipher.doFinal(outBuf, length1);
        int actualLength = length1 + length2;
        byte[] result = new byte[actualLength];
        System.arraycopy(outBuf, 0, result, 0, result.length);
        return result;
    }

来自.net的代码：

 public static RijndaelManaged GetRijndaelManaged(String secretKey)
        {
            var keyBytes = new byte[16];
            var secretKeyBytes = Encoding.UTF8.GetBytes(secretKey);
            Array.Copy(secretKeyBytes, keyBytes, Math.Min(keyBytes.Length, secretKeyBytes.Length));
            return new RijndaelManaged
            {
                Mode = CipherMode.CBC,
                Padding = PaddingMode.PKCS7,
                KeySize = 128,
                BlockSize = 128,
                Key = keyBytes,
                IV = keyBytes
            };
        }

        public static byte[] EncryptCBC(byte[] plainBytes, RijndaelManaged rijndaelManaged)
        {
            return rijndaelManaged.CreateEncryptor()
                .TransformFinalBlock(plainBytes, 0, plainBytes.Length);
        }

        public static byte[] DecryptCBC(byte[] encryptedData, RijndaelManaged rijndaelManaged)
        {
            return rijndaelManaged.CreateDecryptor()
                .TransformFinalBlock(encryptedData, 0, encryptedData.Length);
        }

        public static String EncryptCBCStr(String plainText, String key)
        {
            var plainBytes = Encoding.UTF8.GetBytes(plainText);
            return Convert.ToBase64String(EncryptCBC(plainBytes, GetRijndaelManaged(key)));
        }

         public static String DecryptCBCStr(String encryptedText, String key)
        {
            var encryptedBytes = Convert.FromBase64String(encryptedText);
            return Encoding.UTF8.GetString(DecryptCBC(encryptedBytes, GetRijndaelManaged(key)));
        }

// call

var PlainText = "Hello How are you !2#&*()% 123456@";
var EncryptionKey = "MAKV2SPBNI992122";
var cypherCBC = EncryptCBCStr(PlainText, EncryptionKey);
var decryptCBC = DecryptCBCStr(cypherCBC, EncryptionKey);

先谢谢。

Answer 1

这个问题已得到解决......它只是关键/ IV字节问题。在.net中有相同的密钥和IV在java中我使用了不同的IV。

java代码中的更正：

而不是

byte key[] = "MAKV2SPBNI992122".getBytes("UTF-8");
byte[] iv = new byte[16];

使用它。

byte key[] = "MAKV2SPBNI992122".getBytes("UTF-8");
byte[] iv =  "MAKV2SPBNI992122".getBytes("UTF-8");

跨平台上的AES cbc填充加密/解密（.net c＃和代号为一个充气城堡）

1 个答案: