import java.io.UnsupportedEncodingException;
import java.security.SecureRandom;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;
import Decoder.BASE64Decoder;
import Decoder.BASE64Encoder;
import javax.crypto.SecretKeyFactory;
import javax.crypto.SecretKey;
import javax.crypto.Cipher;
public class MyDesc {
public MyDesc() {}
//测试
public static void main(String args[]) throws UnsupportedEncodingException {
//待加密内容
String str = "{\"pid\":\"511025198710264794\",\"pname\":false}";
//密码,长度要是8的倍数
String password = "2018052400018841";
String result = MyDesc.encrypt(str.getBytes("UTF-8"),password);
System.out.println("加密后:"+result); //uMI2SuMFepPhQxytg/ONQPwfCnlLZHYOQiuIY6u176gbgHCw8nD7u3fMV7IgSr5o
//直接将如上内容解密
try {
String decryResult = MyDesc.decrypt(result, password);
System.out.println("解密后:"+decryResult); //{"pid":"511025198710264794","pname":false}
} catch (Exception e1) {
e1.printStackTrace();
}
}
/**
* 加密
* @param datasource
* @param password
* @return
*/
public static String encrypt(byte[] datasource, String password) {
String strIv = "12345678";
try{
SecureRandom random = new SecureRandom();
DESKeySpec desKey = new DESKeySpec(password.getBytes("UTF-8"));
//创建一个密匙工厂,然后用它把DESKeySpec转换成
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
IvParameterSpec param = new IvParameterSpec(strIv.getBytes());
cipher.init(Cipher.ENCRYPT_MODE, securekey, param);
//现在,获取数据并加密
//正式执行加密操作
byte[] buf = cipher.doFinal(datasource);
String utf8 = new BASE64Encoder().encodeBuffer(buf);
return utf8;
}catch(Throwable e){
e.printStackTrace();
}
return null;
}
/**
* 解密
* @param src
* @param password
* @return
* @throws Exception
*/
public static String decrypt(String src, String password) throws Exception {
String strIv = "12345678";
// DES算法要求有一个可信任的随机数源
SecureRandom random = new SecureRandom();
// 创建一个DESKeySpec对象
DESKeySpec desKey = new DESKeySpec(password.getBytes());
// 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
IvParameterSpec param = new IvParameterSpec(strIv.getBytes());
cipher.init(Cipher.DECRYPT_MODE, securekey, param);
// 真正开始解密操作
byte[] dec = new BASE64Decoder().decodeBuffer(src);
byte[] utf8 = cipher.doFinal(dec);
String decryptedStr = new String(utf8, "UTF-8");
return decryptedStr;
}
}