Question

我有一个用这段代码加密的文件（用于加密的C＃代码）：

public static byte[] AES_Encrypt(byte[] bytesToBeEncrypted, byte[] passwordBytes)
    {
        byte[] encryptedBytes = null;

        // Set your salt here, change it to meet your flavor:
        // The salt bytes must be at least 8 bytes.
        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.CBC;

                using (var cs = new CryptoStream(ms, AES.CreateEncryptor(), CryptoStreamMode.Write))
                {
                    cs.Write(bytesToBeEncrypted, 0, bytesToBeEncrypted.Length);
                    cs.Close();
                }
                encryptedBytes = ms.ToArray();
            }
        }

        return encryptedBytes;
    }

我有密码，我正在尝试在java中解密，但与C＃相比，在java中无法理解如何执行此操作。 C＃中有一些库我可以解密它，但我需要在java中这样做。要解密的文件是csv文件。

到目前为止，我在网上和其他一些工作中搜索到目前为止。如果我放入任何字符串代替“encryptedString”我可以解密就好了。所以我猜我的方法是不正确的，我应该只是解密文件而不是文件变成的字符串。但是如何实现呢？我在这里有一些代码，它也接受文件本身，将其转换为字节数组，然后尝试解密，代替字符串的字节。也没有得到解密来解决这个问题。如果有人可以帮助我，这将是非常有帮助的。

我的java代码：

File encryptedFile = getFileTodecrypt();
    byte[] salt = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
    SecretKeyFactory factory =     SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
    KeySpec spec = new PBEKeySpec(PASSWORD.toCharArray(), salt, 1000, 256);
    SecretKey tmp = factory.generateSecret(spec);
    SecretKey secret = new SecretKeySpec(tmp.getEncoded(), "AES");

    /* Encrypt the message. */
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    cipher.init(Cipher.ENCRYPT_MODE, secret);

    AlgorithmParameters params = cipher.getParameters();
    byte[] iv = params.getParameterSpec(IvParameterSpec.class).getIV();

    File fileToDecrypt = getFileTodecrypt(); // this gets my file
    InputStream inputStream = FileUtils.openInputStream(fileToDecrypt);
    byte[] bytesToBeDecrypted = IOUtils.toByteArray(inputStream);

    // file bytes does not work
    //byte[] ciphertext = cipher.doFinal(bytesToBeDecrypted);
    // file to string does not work
    //byte[] ciphertext = cipher.doFinal(encryptedString.getBytes("UTF-8"));
    // this works, but does not take c# code into account at all
    byte[] ciphertext = cipher.doFinal("hello".getBytes("UTF-8"));

    IvParameterSpec iv2 = new IvParameterSpec(iv);

    //decrypt
    cipher.init(Cipher.DECRYPT_MODE, secret, new IvParameterSpec(iv));
    String plaintext = new String(cipher.doFinal(ciphertext), "UTF-8");
    System.out.println(plaintext);

}

private String convertFileToString(File encryptedFile) throws IOException {
    String fileString = FileUtils.readFileToString(encryptedFile, "UTF-8");
    return fileString;

}

使用在C＃中使用Java创建的salt /密码解密文件

0 个答案: