package com.supplier.util;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import java.security.SecureRandom;

/**
 * 加密
 */
public class DesEncry {

    private final static String DES = "DES";

    //des加密秘钥
    private static final String key = "b8c987a7";

    /**
     *
     * @param src 加密数据
     * @param key 秘钥
     * @return 返回结果
     * @throws Exception 异常
     */
    public static byte[] encrypt(byte[] src, byte[] key) throws Exception {
        // DES算法要求有一个可信任的随机数源
        SecureRandom sr = new SecureRandom();
        // 从原始密匙数据创建DESKeySpec对象
        DESKeySpec dks = new DESKeySpec(key);
        // 创建一个密匙工厂，然后用它把DESKeySpec转换成一个SecretKey对象
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
        SecretKey securekey = keyFactory.generateSecret(dks);
        // Cipher对象实际完成加密操作
        Cipher cipher = Cipher.getInstance(DES);
        // 用密匙初始化Cipher对象
        cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
        // 正式执行加密操作
        return cipher.doFinal(src);
    }
    /**
     *
     * @param password 密码
     * @param key 加密字符串
     * @return 返回结果
     */
    public final static String encrypt(String password) {
        try {
            return byte2String(encrypt(password.getBytes(), key.getBytes()));
        } catch (Exception e) {
        }
        return null;
    }

    public static String byte2String(byte[] b) {
        String hs = "";
        String stmp = "";
        for (int n = 0; n < b.length; n++) {
            stmp = (Integer.toHexString(b[n] & 0XFF));
            if (stmp.length() == 1)
                hs = hs + "0" + stmp;
            else
                hs = hs + stmp;
        }
        return hs.toUpperCase();
    }
}
