nullITeye - 亚美娱乐

nullITeye

2019年03月05日14时45分51秒 | 作者: 丹云 | 标签: | 浏览: 1880

import java.security.Key;
import java.security.SecureRandom;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;

import Decoder.BASE64Decoder;
import Decoder.BASE64Encoder;


/** 

* 运用DES加密与解密,可对byte[],String类型进行加密与解密 密文可运用String,byte[]存储. 

* 办法: void getKey(String strKey)从strKey的字条生成一个Key 

* String getEncString(String strMing)对strMing进行加密,回来String密文 String 
* getDesString(String strMi)对strMin进行解密,回来String明文 

* byte[] getEncCode(byte[] byteS)byte[]型的加密 byte[] getDesCode(byte[] 
* byteD)byte[]型的解密 
*/ 
 
public class HttpUtil { 
  Key key; 
 
  /** 
  * 依据参数生成KEY 
  * 
  * @param strKey 
  */ 
  public void getKey(String strKey) { 
  try { 
  KeyGenerator _generator = KeyGenerator.getInstance("DES"); 
  _generator.init(new SecureRandom(strKey.getBytes())); 
  this.key = _generator.generateKey();
  _generator = null; 
  } catch (Exception e) { 
  e.printStackTrace(); 
  } 
  } 
 
  /** 
  * 加密String明文输入,String密文输出 
  * 
  * @param strMing 
  * @return 
  */ 
  public String getEncString(String strMing) { 
  byte[] byteMi = null; 
  byte[] byteMing = null; 
  String strMi = ""; 
  BASE64Encoder base64en = new BASE64Encoder(); 
  try { 
  byteMing = strMing.getBytes("UTF8"); 
  byteMi = this.getEncCode(byteMing); 
  strMi = base64en.encode(byteMi); 
  } catch (Exception e) { 
  e.printStackTrace(); 
  } finally { 
  base64en = null; 
  byteMing = null; 
  byteMi = null; 
  } 
  return strMi; 
  } 
 
  /** 
  * 解密 以String密文输入,String明文输出 
  * 
  * @param strMi 
  * @return 
  */ 
  public String getDesString(String strMi) { 
  BASE64Decoder base64De = new BASE64Decoder(); 
  byte[] byteMing = null; 
  byte[] byteMi = null; 
  String strMing = ""; 
  try { 
  byteMi = base64De.decodeBuffer(strMi); 
  byteMing = this.getDesCode(byteMi); 
  strMing = new String(byteMing, "UTF8"); 
  } catch (Exception e) { 
  e.printStackTrace(); 
  } finally { 
  base64De = null; 
  byteMing = null; 
  byteMi = null; 
  } 
  return strMing; 
  } 
 
  /** 
  * 加密以byte[]明文输入,byte[]密文输出 
  * 
  * @param byteS 
  * @return 
  */ 
  private byte[] getEncCode(byte[] byteS) { 
  byte[] byteFina = null; 
  Cipher cipher; 
  try { 
  cipher = Cipher.getInstance("DES"); 
  cipher.init(Cipher.ENCRYPT_MODE, key); 
  byteFina = cipher.doFinal(byteS); 
  } catch (Exception e) { 
  e.printStackTrace(); 
  } finally { 
  cipher = null; 
  } 
  return byteFina; 
  } 
 
  /** 
  * 解密以byte[]密文输入,以byte[]明文输出 
  * 
  * @param byteD 
  * @return 
  */ 
  private byte[] getDesCode(byte[] byteD) { 
  Cipher cipher; 
  byte[] byteFina = null; 
  try { 
  cipher = Cipher.getInstance("DES"); 
  cipher.init(Cipher.DECRYPT_MODE, key); 
  byteFina = cipher.doFinal(byteD); 
  } catch (Exception e) { 
  e.printStackTrace(); 
  } finally { 
  cipher = null; 
  } 
  return byteFina; 
 
  } 
 
  public static void main(String[] args) { 
  HttpUtil des = new HttpUtil();// 实例化一个对像 
  des.getKey("daliantan0v0");// 生成密匙 
 
  System.out.println("=对字符串加密");
  String strEnc = des.getEncString("ysj");// 加密字符串,回来String的密文 
  System.out.println(strEnc); 
 
  String strDes = des.getDesString("anihPu3p3lk=");// 把String 类型的密文解密 
  System.out.println(strDes); 
 
  System.out.println("对字节数组加密=");
 
  /*
  byte[] getEncCode(byte[] byteS)byte[]型的加密 byte[] getDesCode(byte[] 
  * byteD)byte[]型的解密
  */
  } 
 
}


第二种方法:

public  class HttpUtil {
 
  /**
* DES 加密算法
* @param message
* @param key
* @return
* @throws Exception
*/
  public String EncryptAsDoNet(String message, String key) throws Exception  {
  //发生与.net 对应的加密des + base64 加密串
  Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
  DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("GB2312"));
  SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
  SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
  IvParameterSpec iv = new IvParameterSpec(key.getBytes("GB2312"));
  cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);
  byte[] encryptbyte = cipher.doFinal(message.getBytes());
  BASE64Encoder base64Encoder = new BASE64Encoder();
  //base64Encoder.encode(encryptbyte);
  return base64Encoder.encode(encryptbyte);
  //toHexString(encryptbyte).toUpperCase();
  }
 
  /**
* DES 解密算法
* @param message
* @param key
* @return
* @throws Exception
*/
  public String DecryptDoNet(String message, String key) throws Exception {
  //base64 + des 解密.net 加密传来串
  //byte[] bytesrc = convertHexString(message); //不必base64 的方法
  BASE64Decoder base64Decoder = new BASE64Decoder();
  byte[] bytesrc=base64Decoder.decodeBuffer(message);
  Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
  DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("GB2312"));
  SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
  SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
  IvParameterSpec iv = new IvParameterSpec(key.getBytes("GB2312"));
  cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);
  byte[] retByte = cipher.doFinal(bytesrc);

  return new String(retByte);
  }
 
  public static void main(String[] args) {
HttpUtil httpUtil = new HttpUtil();
try {
System.out.println(httpUtil.EncryptAsDoNet("ysj","Ango.WTS"));
System.out.println(httpUtil.DecryptDoNet("eTMv8FChooc=","Ango.WTS" ));
} catch (Exception e) {
System.out.println("e="+e);
}

}
  }



需求用到的 BASE64Decoder 包在附件
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