Java相当于C#AES加密

Question

我在C#中有以下代码.它使用AES对称算法对字节数组进行编码.我需要编写相当于此代码的Java.

class Program
{
    static void Main(string[] args)
    {
        string a = "ABCDEFGHIJKLMNOP";
        byte[] bytes = Encoding.ASCII.GetBytes(a);
        byte[] cipher = encode(bytes, "1111111122222222111111112222222211111111222222221111111122222222", "66666666555555556666666655555555");
    }

    private static byte[] encode(byte[] toEncrypt, string sKey, string sIV)
    {
        byte[] IV = new byte[16];
        byte[] key = new byte[32];
        byte[] array = new byte[toEncrypt.Length];
        string s;

        for (int i = 0; i < IV.Length; ++i)
        {
            s = sIV.Substring(i * 2, 2);
            IV[i] = Convert.ToByte(s, 16);
        }

        for (int i = 0; i < key.Length; ++i)
        {
            s = sKey.Substring(i * 2, 2);
            key[i] = Convert.ToByte(s, 16);
        }

        MemoryStream filecrypt = new MemoryStream(array);

        AesManaged encrypt = new AesManaged();
        encrypt.Mode = CipherMode.CBC;
        encrypt.Padding = PaddingMode.None;
        encrypt.BlockSize = 128;
        encrypt.KeySize = 256;

        CryptoStream cs = new CryptoStream(filecrypt, encrypt.CreateEncryptor(key, IV), CryptoStreamMode.Write);
        cs.Write(toEncrypt, 0, toEncrypt.Length);
        cs.Close();

        return array;
    }
}

这是我尝试用Java编写的.代码看起来很好,但输出不同,一定是错误的.

public class Main {

    public static void main(String [] args) {
        byte [] code = encode("ABCDEFGHIJKLMNOP".getBytes(), "1111111122222222111111112222222211111111222222221111111122222222", "66666666555555556666666655555555");
    }

    private static byte[] toByteArray(String s) {
        int len = s.length();
        byte[] data = new byte[len / 2];
        int a;
        int b;
        for (int i = 0; i < len; i += 2) {
            a = (Character.digit(s.charAt(i), 16) << 4);
            b = Character.digit(s.charAt(i+1), 16);
            int n = (Character.digit(s.charAt(i), 16) << 4)
                    + Character.digit(s.charAt(i+1), 16);
                data[i / 2] = (byte) (n);
        }
        return data;
    }

    private static byte[] encode(byte[] toEncrypt, String skey, String siv)
    {
        byte[] key = toByteArray(skey);
        byte[] iv = toByteArray(siv);

        byte[] array = new byte[toEncrypt.length];

        Cipher cipher;

        try {
            cipher = Cipher.getInstance("AES/CBC/NoPadding");
            cipher.init(Cipher.ENCRYPT_MODE,  new SecretKeySpec(key, "AES"), new IvParameterSpec(iv));
            array = cipher.doFinal(array);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return array;
    }
}

任何线索和想法将非常感激.

Answer 1

您出于某种原因正在初始化byte[] array = new byte[toEncrypt.length];，但在加密之前您从未将内容写入toEncrypt其中。您可以使用System.arraycopy(toEncrypt, 0, array, 0, array.length);，但使用会更容易

byte[] array;
...
array = cipher.doFinal(toEncrypt);
...
return array;