加密算法

最新推荐文章于 2021-03-09 14:14:34 发布

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最新推荐文章于 2021-03-09 14:14:34 发布

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分类专栏：学习笔记

本文链接：https://blog.youkuaiyun.com/a695876649/article/details/54598644

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这个博客展示了如何使用AES加密算法进行数据加密和解密。通过创建`SecretKeySpec`对象并使用`Cipher`类的`ENCRYPT_MODE`和`DECRYPT_MODE`初始化，实现了对指定字节数组的加解密操作。

public class text {
    static final byte[] bytes_a = new byte[]{66, 108, 111, 119, 102, 105, 115, 104};
    static final byte[] bytes_key = new byte[]{104,101,108,108,111,50,48,49,55};
    static final byte[] bytes_content = new byte[]{103,111,111,100,32,106,111,98,32,77,121,32,102,114,105,101,110,100};
    public static void main(String[] args) {

        
        SecretKeySpec se_key = new SecretKeySpec(bytes_key,new String(bytes_a));
       byte[] target =  encrypt(se_key,bytes_content);
        System.out.println(new String(target));
        byte[] bytes = decrypt(se_key,target);
        System.out.println(new String(bytes));
    }

    public static byte[] encrypt(Key key, byte[] text){
        try {
            Cipher cipher = Cipher.getInstance(new String(bytes_a));
            cipher.init(Cipher.ENCRYPT_MODE,key);
            return cipher.doFinal(text);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        }
        return null;
    }
    public static byte[] decrypt(Key key, byte[] text){
        try {
            Cipher cipher = Cipher.getInstance(new String(bytes_a));
            cipher.init(Cipher.DECRYPT_MODE,key);
            return cipher.doFinal(text);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        }
        return null;
    }
}