com.gitee.fufu669.utils.CacheDesUtil Maven / Gradle / Ivy

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package com.gitee.fufu669.utils;


import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

import javax.crypto.*;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.SecretKeySpec;
import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;

@SuppressWarnings({"restriction"})
/** @author wangfupeng */
public class CacheDesUtil {

    public static final Logger logger = LoggerFactory.getLogger(CacheDesUtil.class);

    private byte[] desKey;

    public CacheDesUtil(String desKey) {
        this.desKey = desKey.getBytes();
    }

    public static String base64Encode(byte[] s) {
        if (s == null) {
            return null;
        }
        BASE64Encoder b = new BASE64Encoder();
        return b.encode(s);
    }

    public static byte[] base64Decode(String s) throws IOException {
        if (s == null) {
            return null;
        }
        BASE64Decoder decoder = new BASE64Decoder();
        byte[] b = decoder.decodeBuffer(s);
        return b;
    }

    public byte[] desEncrypt(byte[] plainText) throws Exception {
        SecureRandom sr = new SecureRandom();
        byte rawKeyData[] = desKey;
        DESKeySpec dks = new DESKeySpec(rawKeyData);
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey key = keyFactory.generateSecret(dks);
        Cipher cipher = Cipher.getInstance("DES");
        cipher.init(Cipher.ENCRYPT_MODE, key, sr);
        byte data[] = plainText;
        byte encryptedData[] = cipher.doFinal(data);
        return encryptedData;
    }

    public byte[] desDecrypt(byte[] encryptText) throws Exception {
        SecureRandom sr = new SecureRandom();
        byte rawKeyData[] = desKey;
        DESKeySpec dks = new DESKeySpec(rawKeyData);
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey key = keyFactory.generateSecret(dks);
        Cipher cipher = Cipher.getInstance("DES");
        cipher.init(Cipher.DECRYPT_MODE, key, sr);
        byte encryptedData[] = encryptText;
        byte decryptedData[] = cipher.doFinal(encryptedData);
        return decryptedData;
    }

    public String encrypt(String input) throws Exception {
        return base64Encode(desEncrypt(input.getBytes()));
    }

    public String decrypt(String input) throws Exception {
        byte[] result = base64Decode(input);
        return new String(desDecrypt(result));
    }

}