encrypt.java~67~

1． 消息即时通信 2． 消息发送实现一对一、一对多等多种发送模式 3． 发送的消息实现多彩文本编辑

package chat;



import java.security.*;
import javax.crypto.*;
import javax.crypto.spec.*;
import java.io.*;

public class Encrypt {
  final String Algorithm = "DES/CBC/PKCS5Padding";
  String myinfo = "要加密的信息,a";


  public String jiaMi(String info){
    String jiaMiInfo=null;
    try{
      byte[] bytes = {
          'e', '+', 's', 'u', '%', '*', '4', 'O'};
      byte[] key = new String("de$%^@#-").getBytes("UTF8");
      SecretKey deskey = new SecretKeySpec(key, "DES");
      Cipher c1 = Cipher.getInstance(Algorithm);
      IvParameterSpec ivSpec = new IvParameterSpec(bytes);
      c1.init(Cipher.ENCRYPT_MODE, deskey, ivSpec);
      byte[] cipherByte = c1.doFinal(info.getBytes("UTF8"));
      System.out.println(cipherByte);
      jiaMiInfo=cipherByte.toString();

    }catch(Exception e){
    }
    return jiaMiInfo;
  }
  public String jieMi(byte[] info){
    String jieMiInfo=null;
    try{
      byte[] bytes = {
          'e', '+', 's', 'u', '%', '*', '4', 'O'};
      byte[] key = new String("de$%^@#-").getBytes("UTF8");
      SecretKey deskey = new SecretKeySpec(key, "DES");
      Cipher c1 = Cipher.getInstance(Algorithm);
      IvParameterSpec ivSpec = new IvParameterSpec(bytes);
      //byte[] cipherByte = c1.doFinal(info.getBytes());
      c1 = Cipher.getInstance(Algorithm);
      c1.init(Cipher.DECRYPT_MODE, deskey, ivSpec);
      byte[] clearByte = c1.doFinal(info);
      jieMiInfo= new String(clearByte);
    }catch(Exception e){
      e.printStackTrace();
    }
    return jieMiInfo;


  }

  public void run() {
    //添加新安全算法,如果用JCE就要把它添加进去
    //Security.addProvider(new com.sun.crypto.provider.SunJCE());
    //final String Algorithm="DES"; //定义加密算法,可用 DES,DESede,Blowfish
    final String Algorithm = "DES/CBC/PKCS5Padding";
    String myinfo = "要加密的信息";

    try {
      //生成密钥
      byte[] bytes = {
          'e', '+', 's', 'u', '%', '*', '4', 'O'};
      byte[] key = new String("de$%^@#-").getBytes();
      SecretKey deskey = new SecretKeySpec(key, "DES");
      Cipher c1 = Cipher.getInstance(Algorithm);
      IvParameterSpec ivSpec = new IvParameterSpec(bytes);
      c1.init(Cipher.ENCRYPT_MODE, deskey, ivSpec);
      //KeyGenerator keygen = KeyGenerator.getInstance(Algorithm);
      //SecretKey deskey = keygen.generateKey();
      //加密
      System.out.println("加密前的二进串:" + byte2hex(myinfo.getBytes()));
      System.out.println("加密前的信息:" + myinfo);
      //Cipher c1 = Cipher.getInstance(Algorithm);
      //c1.init(Cipher.ENCRYPT_MODE,deskey);
      byte[] cipherByte = c1.doFinal(myinfo.getBytes());
      System.out.println("加密后的二进串:" + byte2hex(cipherByte));
      //解密
      c1 = Cipher.getInstance(Algorithm);
      c1.init(Cipher.DECRYPT_MODE, deskey, ivSpec);
      byte[] clearByte = c1.doFinal(cipherByte);
      System.out.println("解密密钥：" + (new String(deskey.getEncoded())));
      System.out.println("解密后的二进串:" + byte2hex(clearByte));
      System.out.println("解密后的信息:" + (new String(clearByte)));
    }
    catch (java.security.NoSuchAlgorithmException e1) {
      e1.printStackTrace();
    }
    catch (javax.crypto.NoSuchPaddingException e2) {
      e2.printStackTrace();
    }
    catch (java.lang.Exception e3) {
      e3.printStackTrace();
    }
  }

  public String byte2hex(byte[] b) { //二行制转字符串
    String hs = "";
    String stmp = "";
    for (int n = 0; n < b.length; n++) {
      stmp = (java.lang.Integer.toHexString(b[n] & 0XFF));
      if (stmp.length() == 1) hs = hs + "0" + stmp;
      else hs = hs + stmp;
      if (n < b.length - 1) hs = hs + ":";
    }
    return hs.toUpperCase();
  }
  public static void main(String[] args) {
   Encrypt my = new Encrypt();
 //  my.run();

//  try {
 String s=my.jiaMi("要加密的信息");
// my.jieMi(s);
 //byte[] b=new String(s).getBytes();
 System.out.println(s.getBytes());
 //System.out.println(s);
//try {
//  my.jieMi(s.getBytes("UTF8"));
//}
//catch (UnsupportedEncodingException ex) {
//}
 //   System.out.println(my.jieMi( );
  //}
 // catch (UnsupportedEncodingException ex) {
//  }
  // my.jieMI("[B@148aa23".getBytes());

 }

}