package com.hxzk.util;
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import org.apache.commons.codec.binary.Base64;
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import javax.crypto.Cipher;
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import javax.crypto.SecretKey;
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import javax.crypto.SecretKeyFactory;
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import javax.crypto.spec.DESKeySpec;
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import java.security.InvalidKeyException;
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import java.security.NoSuchAlgorithmException;
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import java.security.SecureRandom;
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import java.security.spec.InvalidKeySpecException;
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public class DESUtil {
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//算法名称
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public static final String KEY_ALGORITHM = "DES";
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//算法名称/加密模式/填充方式
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//DES共有四种工作模式-->>ECB：电子密码本模式、CBC：加密分组链接模式、CFB：加密反馈模式、OFB：输出反馈模式
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public static final String CIPHER_ALGORITHM = "DESede/CBC/PKCS5Padding";
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public static String key = "FHGT4KHVJKVKV2KHCTBM";
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/**
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* 生成密钥key对象
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* @param KeyStr 密钥字符串
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* @return 密钥对象
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* @throws InvalidKeyException
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* @throws NoSuchAlgorithmException
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* @throws InvalidKeySpecException
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* @throws Exception
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*/
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private static SecretKey keyGenerator(String keyStr) throws Exception {
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byte input[] = HexString2Bytes(keyStr);
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DESKeySpec desKey = new DESKeySpec(input);
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//创建一个密匙工厂，然后用它把DESKeySpec转换成
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SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
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SecretKey securekey = keyFactory.generateSecret(desKey);
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return securekey;
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}
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private static int parse(char c) {
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if (c >= 'a') return (c - 'a' + 10) & 0x0f;
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if (c >= 'A') return (c - 'A' + 10) & 0x0f;
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return (c - '0') & 0x0f;
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}
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// 从十六进制字符串到字节数组转换
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public static byte[] HexString2Bytes(String hexstr) {
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byte[] b = new byte[hexstr.length() / 2];
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int j = 0;
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for (int i = 0; i < b.length; i++) {
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char c0 = hexstr.charAt(j++);
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char c1 = hexstr.charAt(j++);
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b[i] = (byte) ((parse(c0) << 4) | parse(c1));
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}
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return b;
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}
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/**
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* 加密数据
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* @param data 待加密数据
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* @param key 密钥
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* @return 加密后的数据
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*/
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public static String encrypt(String data, String key) throws Exception {
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//DES算法要求有一个可信任的随机数源
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SecureRandom sr = new SecureRandom();
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// 从原始密匙数据创建DESKeySpec对象
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DESKeySpec dks = new DESKeySpec(key.getBytes());
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// 创建一个密匙工厂，然后用它把DESKeySpec转换成
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// 一个SecretKey对象
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SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(KEY_ALGORITHM);
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SecretKey securekey = keyFactory.generateSecret(dks);
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// Cipher对象实际完成加密操作
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Cipher cipher = Cipher.getInstance(KEY_ALGORITHM);
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// 用密匙初始化Cipher对象
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cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
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// 现在，获取数据并加密
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// 正式执行加密操作
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byte[] results= cipher.doFinal(data.getBytes());
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return Base64.encodeBase64String(results);
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}
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/**
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* 解密数据
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* @param data 待解密数据
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* @param key 密钥
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* @return 解密后的数据
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*/
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public static String decrypt(String data, String key) throws Exception {
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// DES算法要求有一个可信任的随机数源
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SecureRandom sr = new SecureRandom();
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// 从原始密匙数据创建一个DESKeySpec对象
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DESKeySpec dks = new DESKeySpec(key.getBytes());
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// 创建一个密匙工厂，然后用它把DESKeySpec对象转换成
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// 一个SecretKey对象
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SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(KEY_ALGORITHM);
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SecretKey securekey = keyFactory.generateSecret(dks);
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// Cipher对象实际完成解密操作
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Cipher cipher = Cipher.getInstance(KEY_ALGORITHM);
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// 用密匙初始化Cipher对象
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cipher.init(Cipher.DECRYPT_MODE, securekey, sr);
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// 现在，获取数据并解密
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// 正式执行解密操作
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return new String(cipher.doFinal(Base64.decodeBase64(data)));
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}
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public static void main(String[] args) throws Exception {
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// String url = "jdbc:mysql://127.0.0.1:3306/hxzkoa?useUnicode=true&characterEncoding=UTF-8&useSSL=false&autoReconnect=true";
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// String username = "hxzkoa";
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// String password = "XXX";
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// System.out.println("url: " + url);
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// System.out.println("username: " + username);
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// System.out.println("password: " + password);
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// String e_url = encrypt(url, key);
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// String e_username = encrypt(username, key);
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// String e_password = encrypt(password, key);
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// System.out.println("加密后url: " + e_url);
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// System.out.println("加密后username: " + e_username);
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// System.out.println("加密后password: " + e_password);
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String url = "jdbc:mysql://localhost:3306/hxzkuwb?useUnicode=true&characterEncoding=UTF-8&useSSL=false&autoReconnect=true";
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String username = "root";
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String password = "123456";
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System.out.println("url: " + url);
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System.out.println("username: " + username);
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System.out.println("password: " + password);
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String e_url = encrypt(url, key);
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String e_username = encrypt(username, key);
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String e_password = encrypt(password,key);
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System.out.println("加密后url: " + e_url);
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System.out.println("加密后username: " + e_username);
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System.out.println("加密后password: " + e_password);
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}
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}
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