通过这个方法可以实现java和C#相互加密与解密 并能保持解密出来一致
方法一:通过.NET的key和VI来生成对应于java的key
java:
Java代码
- <span style="color: #888888;">import java.security.Key;
- import java.security.spec.AlgorithmParameterSpec;
- import javax.crypto.Cipher;
- import javax.crypto.SecretKeyFactory;
- import javax.crypto.spec.DESKeySpec;
- import javax.crypto.spec.IvParameterSpec;
- import sun.misc.BASE64Decoder;
- import sun.misc.BASE64Encoder;
- public class CryptoTools {
- private static final byte[] DESkey = { (byte) 0x15, (byte) 0xE7,
- (byte) 0xA1, (byte) 0x22, (byte) 0x96, (byte) 0x8B, (byte) 0x24,
- (byte) 0xFA };// 设置密钥,略去
- private static final byte[] DESIV = { (byte) 0xCE, (byte) 0x35, (byte) 0x5,
- (byte) 0xD, (byte) 0x98, (byte) 0x91, (byte) 0x8, (byte) 0xA };// 设置向量,略去
- static AlgorithmParameterSpec iv = null;// 加密算法的参数接口,IvParameterSpec是它的一个实现
- private static Key key = null;
- public CryptoTools() throws Exception {
- DESKeySpec keySpec = new DESKeySpec(DESkey);// 设置密钥参数
- iv = new IvParameterSpec(DESIV);// 设置向量
- SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");// 获得密钥工厂
- key = keyFactory.generateSecret(keySpec);// 得到密钥对象
- }
- public String encode(String data) throws Exception {
- Cipher enCipher = Cipher.getInstance("DES/CBC/PKCS5Padding");// 得到加密对象Cipher
- enCipher.init(Cipher.ENCRYPT_MODE, key, iv);// 设置工作模式为加密模式,给出密钥和向量
- byte[] pasByte = enCipher.doFinal(data.getBytes("utf-8"));
- BASE64Encoder base64Encoder = new BASE64Encoder();
- return base64Encoder.encode(pasByte);
- }
- public String decode(String data) throws Exception {
- Cipher deCipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
- deCipher.init(Cipher.DECRYPT_MODE, key, iv);
- BASE64Decoder base64Decoder = new BASE64Decoder();
- byte[] pasByte = deCipher.doFinal(base64Decoder.decodeBuffer(data));
- return new String(pasByte, "UTF-8");
- }
- public static void main(String[] args) throws Exception {
- CryptoTools tools = new CryptoTools();
- System.out.println("加密:" + tools.encode("天下"));
- System.out.println("解密:" + tools.decode(tools.encode("天下")));
- }
- }</span>
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方法二:通过java的key来生成对应于.NET的key和VI
C#:
C#代码
- <span style="color: #888888;">using System;
- using System.Collections.Generic;
- using System.ComponentModel;
- using System.Data;
- using System.Drawing;
- using System.Text;
- using System.Windows.Forms;
- using System.Configuration;
- using System.Web;
- using System.Security.Cryptography;
- using System.IO;
- namespace DES
- {
- public partial class Form1 : Form
- {
- public Form1()
- {
- InitializeComponent();
- }
- private void button1_Click(object sender, EventArgs e)
- {
- string jiami = textBox1.Text;
- textBox2.Text= DESEnCode(jiami, "11111111");
- }
- public static string DES_Key = "11111111";
- #region DESEnCode DES加密
- public static string DESEnCode(string pToEncrypt, string sKey)
- {
- // string pToEncrypt1 = HttpContext.Current.Server.UrlEncode(pToEncrypt);
- DESCryptoServiceProvider des = new DESCryptoServiceProvider();
- byte[] inputByteArray = Encoding.GetEncoding("UTF-8").GetBytes(pToEncrypt);
- //建立加密对象的密钥和偏移量
- //原文使用ASCIIEncoding.ASCII方法的GetBytes方法
- //使得输入密码必须输入英文文本
- des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
- des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
- MemoryStream ms = new MemoryStream();
- CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
- cs.Write(inputByteArray, 0, inputByteArray.Length);
- cs.FlushFinalBlock();
- StringBuilder ret = new StringBuilder();
- foreach (byte b in ms.ToArray())
- {
- ret.AppendFormat("{0:X2}", b);
- }
- ret.ToString();
- return ret.ToString();
- }
- #endregion
- #region DESDeCode DES解密
- public static string DESDeCode(string pToDecrypt, string sKey)
- {
- // HttpContext.Current.Response.Write(pToDecrypt + "<br>" + sKey);
- // HttpContext.Current.Response.End();
- DESCryptoServiceProvider des = new DESCryptoServiceProvider();
- byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
- for (int x = 0; x < pToDecrypt.Length / 2; x++)
- {
- int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
- inputByteArray[x] = (byte)i;
- }
- des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
- des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
- MemoryStream ms = new MemoryStream();
- CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
- cs.Write(inputByteArray, 0, inputByteArray.Length);
- cs.FlushFinalBlock();
- StringBuilder ret = new StringBuilder();
- // return HttpContext.Current.Server.UrlDecode(System.Text.Encoding.Default.GetString(ms.ToArray()));
- return System.Text.Encoding.Default.GetString(ms.ToArray());
- }
- #endregion
- private void button2_Click(object sender, EventArgs e)
- {
- string jiemi = textBox2.Text;
- textBox3.Text = DESDeCode(jiemi,"11111111");
- }
- }
- }
- </span>
java:
Java代码
- <span style="color: #888888;">import javax.crypto.Cipher;
- import javax.crypto.SecretKey;
- import javax.crypto.SecretKeyFactory;
- import javax.crypto.spec.DESKeySpec;
- import javax.crypto.spec.IvParameterSpec;
- public class Des {
- private byte[] desKey;
- //解密数据
- public static String decrypt(String message,String key) throws Exception {
- byte[] bytesrc =convertHexString(message);
- Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
- DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));
- SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
- SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
- IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));
- cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);
- byte[] retByte = cipher.doFinal(bytesrc);
- return new String(retByte);
- }
- public static byte[] encrypt(String message, String key)
- throws Exception {
- Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
- DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));
- SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
- SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
- IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));
- cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);
- return cipher.doFinal(message.getBytes("UTF-8"));
- }
- public static byte[] convertHexString(String ss)
- {
- byte digest[] = new byte[ss.length() / 2];
- for(int i = 0; i < digest.length; i++)
- {
- String byteString = ss.substring(2 * i, 2 * i + 2);
- int byteValue = Integer.parseInt(byteString, 16);
- digest[i] = (byte)byteValue;
- }
- return digest;
- }
- public static void main(String[] args) throws Exception {
- String key = "11111111";
- String value="aa";
- String jiami=java.net.URLEncoder.encode(value, "utf-8").toLowerCase();
- System.out.println("加密数据:"+jiami);
- String a=toHexString(encrypt(jiami, key)).toUpperCase();
- System.out.println("加密后的数据为:"+a);
- String b=java.net.URLDecoder.decode(decrypt(a,key), "utf-8") ;
- System.out.println("解密后的数据:"+b);
- }
- public static String toHexString(byte b[]) {
- StringBuffer hexString = new StringBuffer();
- for (int i = 0; i < b.length; i++) {
- String plainText = Integer.toHexString(0xff & b[i]);
- if (plainText.length() < 2)
- plainText = "0" + plainText;
- hexString.append(plainText);
- }
- return hexString.toString();
- }
- }
- </span>