具有Java / C＃客戶端的C＃服務器，Aes256加密和解密

Question

所以我有我的c＃服務器程序和一個工作的c＃客戶端，現在我想將java用於linux和mac客戶端。 因此，當應用程序啟動時，它將向服務器請求當前的加密/解密密鑰，該密鑰將用於通信加密。 但是由於我對Java還是很陌生，所以我真的不知道如何使它工作，代碼非常不同，我的Java客戶端有以下代碼：

 public class CryptoClass { static String IV = "AAAAAAAAAAAAAAAA"; public static byte[] encrypt(String plainText, String encryptionKey) throws Exception { Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding", "SunJCE"); SecretKeySpec key = new SecretKeySpec(encryptionKey.getBytes("UTF-8"), "AES"); cipher.init(Cipher.ENCRYPT_MODE, key,new IvParameterSpec(IV.getBytes("UTF-8"))); return cipher.doFinal(plainText.getBytes("UTF-8")); } public static String decrypt(byte[] cipherText, String encryptionKey) throws Exception{ Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding", "SunJCE"); SecretKeySpec key = new SecretKeySpec(encryptionKey.getBytes("UTF-8"), "AES"); cipher.init(Cipher.DECRYPT_MODE, key,new IvParameterSpec(IV.getBytes("UTF-8"))); return new String(cipher.doFinal(cipherText),"UTF-8"); } } 

這是C＃客戶端的代碼

public byte[] AES_Decrypt(byte[] bytesToBeDecrypted, byte[] passwordBytes)
{
    byte[] decryptedBytes = null;
    byte[] saltBytes = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
    using (MemoryStream ms = new MemoryStream())
    {
        using (RijndaelManaged AES = new RijndaelManaged())
        {
            AES.KeySize = 256;
            AES.BlockSize = 128;
            var key = new Rfc2898DeriveBytes(passwordBytes, saltBytes, 1000);
            AES.Key = key.GetBytes(AES.KeySize / 8);
            AES.IV = key.GetBytes(AES.BlockSize / 8);
            AES.Mode = CipherMode.CFB;
            AES.Padding = PaddingMode.PKCS7;
            using (var cs = new CryptoStream(ms, AES.CreateDecryptor(), CryptoStreamMode.Write))
            {
                cs.Write(bytesToBeDecrypted, 0, bytesToBeDecrypted.Length);
                cs.Close();
            }
            decryptedBytes = ms.ToArray();
        }
    }
    return decryptedBytes;
}
public byte[] AES_Encrypt(byte[] bytesToBeEncrypted, byte[] passwordBytes)
{
    byte[] encryptedBytes = null;
    byte[] saltBytes = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
    using (MemoryStream ms = new MemoryStream())
    {
        using (RijndaelManaged AES = new RijndaelManaged())
        {
            AES.KeySize = 256;
            AES.BlockSize = 128;
            var key = new Rfc2898DeriveBytes(passwordBytes, saltBytes, 1000);
            AES.Key = key.GetBytes(AES.KeySize / 8);
            AES.IV = key.GetBytes(AES.BlockSize / 8);
            AES.Mode = CipherMode.CFB;
            AES.Padding = PaddingMode.PKCS7;
            using (var cs = new CryptoStream(ms, AES.CreateEncryptor(), CryptoStreamMode.Write))
            {
                cs.Write(bytesToBeEncrypted, 0, bytesToBeEncrypted.Length);
                cs.Close();
            }
            encryptedBytes = ms.ToArray();
        }
    }
    return encryptedBytes;
}

提前致謝

Answer 1

我修復了它，將我的java代碼更改為：

public class CryptoClass {
private static final String AES_CBC_PKCS5PADDING = "AES/CBC/PKCS5PADDING";
private static final int KEY_SIZE = 256;
public String DecryptText(String input) throws NoSuchAlgorithmException
    {
        input = input.replace("\0", "");
        byte[] bytesToBeDecrypted = input.getBytes();
        byte[] passwordBytes = Config.ServerKey.getBytes();
        MessageDigest md = MessageDigest.getInstance("SHA-256");
        passwordBytes = md.digest(passwordBytes);
        byte[] bytesDecrypted = null;
    try {
        bytesDecrypted = AES_Decrypt(bytesToBeDecrypted, passwordBytes);
    } catch (IllegalBlockSizeException ex) {
        Logger.getLogger(CryptoClass.class.getName()).log(Level.SEVERE, null, ex);
    } catch (BadPaddingException ex) {
        Logger.getLogger(CryptoClass.class.getName()).log(Level.SEVERE, null, ex);
    } catch (InvalidKeyException ex) {
        Logger.getLogger(CryptoClass.class.getName()).log(Level.SEVERE, null, ex);
    } catch (InvalidAlgorithmParameterException ex) {
        Logger.getLogger(CryptoClass.class.getName()).log(Level.SEVERE, null, ex);
    } catch (NoSuchPaddingException ex) {
        Logger.getLogger(CryptoClass.class.getName()).log(Level.SEVERE, null, ex);
    }
        return new String(bytesDecrypted);
    }
    public String EncryptText(String input) throws NoSuchAlgorithmException
    {
        byte[] bytesToBeEncrypted = input.getBytes();
        byte[] passwordBytes = Config.ServerKey.getBytes();
        MessageDigest md = MessageDigest.getInstance("SHA-256");
        passwordBytes = md.digest(passwordBytes);
        byte[] bytesEncrypted = null;
    try {
        bytesEncrypted = AES_Encrypt(bytesToBeEncrypted, passwordBytes);
    } catch (NoSuchPaddingException ex) {
        Logger.getLogger(CryptoClass.class.getName()).log(Level.SEVERE, null, ex);
    } catch (InvalidAlgorithmParameterException ex) {
        Logger.getLogger(CryptoClass.class.getName()).log(Level.SEVERE, null, ex);
    } catch (InvalidKeyException ex) {
        Logger.getLogger(CryptoClass.class.getName()).log(Level.SEVERE, null, ex);
    } catch (IllegalBlockSizeException ex) {
        Logger.getLogger(CryptoClass.class.getName()).log(Level.SEVERE, null, ex);
    } catch (BadPaddingException ex) {
        Logger.getLogger(CryptoClass.class.getName()).log(Level.SEVERE, null, ex);
    }
        return Base64.getEncoder().encodeToString(bytesEncrypted);
    }
    public byte[] AES_Decrypt(byte[] bytesToBeDecrypted, byte[] passwordBytes) throws IllegalBlockSizeException, BadPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, NoSuchPaddingException
    {
        byte[] decryptedBytes = null;
        byte[] saltBytes = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
        final Cipher cipher = Cipher.getInstance(AES_CBC_PKCS5PADDING);
        final byte[] keyData = Arrays.copyOf(passwordBytes, KEY_SIZE
                / Byte.SIZE);
        final byte[] ivBytes = Arrays.copyOf(keyData, cipher.getBlockSize());
        cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(keyData, "AES"),
                new IvParameterSpec(ivBytes));
        decryptedBytes = cipher.doFinal(bytesToBeDecrypted);
        return decryptedBytes;
    }
    public byte[] AES_Encrypt(byte[] bytesToBeEncrypted, byte[] passwordBytes) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidAlgorithmParameterException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException
    {
        byte[] encryptedBytes = null;
        byte[] saltBytes = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
        final Cipher cipher = Cipher.getInstance(AES_CBC_PKCS5PADDING);
        final byte[] keyData = Arrays.copyOf(passwordBytes, KEY_SIZE
                / Byte.SIZE);
        final byte[] ivBytes = Arrays.copyOf(keyData, cipher.getBlockSize());
        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(keyData, "AES"),
                new IvParameterSpec(ivBytes));
        encryptedBytes = cipher.doFinal(bytesToBeEncrypted);
        return encryptedBytes;
    }