字符串加密有效，字节[]数组类型的加密无效 [英] Encryption of Strings works, encryption of byte[] array type does not work

问题描述

我正在使用以下 LINK 进行加密，并使用Strings进行了尝试，并且有效。但是，由于我要处理图像，因此我需要对字节数组进行加密/解密过程。因此，我在该链接中修改了以下代码：

I am using the following LINK for encryption and tried it with Strings and it worked. However, since I am dealing with images, I needed the encryption/decryption process to happen with byte arrays. So I modified the code in that link to the following:

public class AESencrp {

    private static final String ALGO = "AES";
    private static final byte[] keyValue = 
    new byte[] { 'T', 'h', 'e', 'B', 'e', 's', 't',
'S', 'e', 'c', 'r','e', 't', 'K', 'e', 'y' };

    public static byte[] encrypt(byte[] Data) throws Exception {
        Key key = generateKey();
        Cipher c = Cipher.getInstance(ALGO);
        c.init(Cipher.ENCRYPT_MODE, key);
        byte[] encVal = c.doFinal(Data);
        //String encryptedValue = new BASE64Encoder().encode(encVal);
        return encVal;
    }

    public static byte[] decrypt(byte[] encryptedData) throws Exception {
        Key key = generateKey();
        Cipher c = Cipher.getInstance(ALGO);
        c.init(Cipher.DECRYPT_MODE, key);

        byte[] decValue = c.doFinal(encryptedData);
        return decValue;
    }

    private static Key generateKey() throws Exception {
        Key key = new SecretKeySpec(keyValue, ALGO);
        return key;
    }

而检查类是：

public class Checker {

    public static void main(String[] args) throws Exception {

        byte[] array = new byte[]{127,-128,0};
        byte[] arrayEnc = AESencrp.encrypt(array);
        byte[] arrayDec = AESencrp.decrypt(arrayEnc);

        System.out.println("Plain Text : " + array);
        System.out.println("Encrypted Text : " + arrayEnc);
        System.out.println("Decrypted Text : " + arrayDec);
    }
}

但是我的输出是：

Plain Text : [B@1b10d42
Encrypted Text : [B@dd87b2
Decrypted Text : [B@1f7d134

因此，解密后的文本与纯文本不同。知道我在原始链接中尝试了该示例并且该示例可与字符串一起使用时，该怎么办才能解决此问题？

So the decrypted text is not the same as plain text. What should I do to fix this knowing that I tried the example in the original link and it worked with Strings?

推荐答案

您做什么看到的是数组的toString（）方法的结果。不是字节数组的内容。使用 java.util.Arrays.toString（array）显示数组的内容。

What you're seeing is the result of the array's toString() method. It's not the content of the byte array. Use java.util.Arrays.toString(array) to display the content of the arrays.

[B 是类型（字节数组），而 1b10d42 是数组的hashCode。

[B is the type (array of bytes), and 1b10d42 is the hashCode of the array.

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