DESUtils
package com.utils;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.charset.Charset;
import java.security.SecureRandom;
import java.util.Properties;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;
public class DESUtils {
public static final Charset CHARSET = Charset.forName("utf-8");
/**获得des加密的key
* @return
* @throws FileNotFoundException
* @throws IOException
*/
public static String getDESKey() throws FileNotFoundException, IOException {
String fileName = DESUtils.class.getClassLoader().getResource("DES.properties").getPath();//获取文件路径
Properties properties =new Properties();
properties.load(new FileInputStream(new File(fileName)));
String path = properties.getProperty("deskey").trim();
return path;
}
/**
* 加密
* @param data
* @param sKey
* @return
*/
private static byte[] encrypt(byte[] data, String sKey) {
try {
byte[] key = sKey.getBytes();
// 初始化向量
IvParameterSpec iv = new IvParameterSpec(key);
DESKeySpec desKey = new DESKeySpec(key);
// 创建一个密匙工厂,然后用它把DESKeySpec转换成securekey
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey securekey = keyFactory.generateSecret(desKey);
// Cipher对象实际完成加密操作
Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
// 用密匙初始化Cipher对象
cipher.init(Cipher.ENCRYPT_MODE, securekey, iv);
// 现在,获取数据并加密
// 正式执行加密操作
return cipher.doFinal(data);
} catch (Throwable e) {
e.printStackTrace();
}
return null;
}
/**
* 解密
* @param src
* @param sKey
* @return
* @throws Exception
*/
private static byte[] decrypt(byte[] src, String sKey) throws Exception {
byte[] key = sKey.getBytes();
// 初始化向量
IvParameterSpec iv = new IvParameterSpec(key);
// 创建一个DESKeySpec对象
DESKeySpec desKey = new DESKeySpec(key);
// 创建一个密匙工厂
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
// 将DESKeySpec对象转换成SecretKey对象
SecretKey securekey = keyFactory.generateSecret(desKey);
// Cipher对象实际完成解密操作
Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
// 用密匙初始化Cipher对象
cipher.init(Cipher.DECRYPT_MODE, securekey, iv);
// 真正开始解密操作
return cipher.doFinal(src);
}
/**
* 将二进制转换成16进制
*
* @param buf
* @return
*/
private static String parseByte2HexStr(byte buf[]) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < buf.length; i++) {
String hex = Integer.toHexString(buf[i] & 0xFF);
if (hex.length() == 1) {
hex = '0' + hex;
}
sb.append(hex.toUpperCase());
}
return sb.toString();
}
/**
* 将16进制转换为二进制
*
* @param hexStr
* @return
*/
private static byte[] parseHexStr2Byte(String hexStr) {
if (hexStr.length() < 1) return null;
byte[] result = new byte[hexStr.length() / 2];
for (int i = 0; i < hexStr.length() / 2; i++) {
int high = Integer.parseInt(hexStr.substring(i * 2, i * 2 + 1), 16);
int low = Integer.parseInt(hexStr.substring(i * 2 + 1, i * 2 + 2), 16);
result[i] = (byte) (high * 16 + low);
}
return result;
}
/**
* 加密
* @param srcStr
* @param charset
* @param sKey
* @return
*/
public static String encrypt(String srcStr, Charset charset, String sKey) {
byte[] src = srcStr.getBytes(charset);
byte[] buf = encrypt(src, sKey);
return parseByte2HexStr(buf);
}
/**
* 解密
*
* @param hexStr
* @param sKey
* @return
* @throws Exception
*/
public static String decrypt(String hexStr, Charset charset, String sKey) throws Exception {
byte[] src = parseHexStr2Byte(hexStr);
byte[] buf = decrypt(src, sKey);
return new String(buf, charset);
}
public static void main(String[] args) throws Exception {
String password = getDESKey();
String s ="https://www.baidu.com/";
String encryptString = encrypt(s, CHARSET, password);
System.out.println(encryptString);
System.out.println(decrypt(encryptString, CHARSET, password));
}
}
忘了哪儿看到的了
以前用到的DES加密 。需要统一的key加密解密。