DES加密 java与.net可以相互加密解密两种方法
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:
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"))); } }
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方法二:通过java的key来生成对应于.NET的key和VI
C#:
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"); } } }
java:
<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(); } }
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