标签:static string tostring rgs rate cep 广州市 ret encrypt
package rsa;
import java.security.*;
import java.security.interfaces.*;
import javax.crypto.*;
public class Test {
protected static RSAPrivateKey privateKey;
protected static RSAPublicKey publicKey;
protected static byte[] resultBytes;
public Test(){
try{
String message = "广东省广州市越秀区";
// Test p = new Test();
System.out.println("明文是" + message);
//生成公钥和私钥对,基于RSA算法生成对象
KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance("RSA");
//初始化密钥对生成器,密钥大小为1024位
keyPairGen.initialize(1024);
//生成一个密钥对,保存在keyPair中
KeyPair keyPair = keyPairGen.generateKeyPair();
//得到私钥和公钥
privateKey =(RSAPrivateKey) keyPair.getPrivate();
publicKey = (RSAPublicKey)keyPair.getPublic();
// System.out.println(privateKey.toString());
//用公钥加密
byte[] srcBytes = message.getBytes();
resultBytes = Test.encrypt(publicKey, srcBytes);
String result = new String(resultBytes);
System.out.println("用公钥加密后密文是:" + result);
// return privateKey;
// //用私钥解密
// byte[] decBytes = Test.decrypt(privateKey,resultBytes);
// String dec = new String(decBytes);
// System.out.println("用私钥加密后的结果是:" + dec);
}catch(Exception e){
e.printStackTrace();
}
// return null;
}
protected static byte[] encrypt(RSAPublicKey publicKey,byte[] srcBytes){
if(publicKey != null){
try{
//Cipher负责完成加密或解密工作,基于RSA
Cipher cipher = Cipher.getInstance("RSA");
//根据公钥,对Cipher对象进行初始化
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
//加密,结果保存进resultBytes,并返回
byte[] resultBytes = cipher.doFinal(srcBytes);
return resultBytes;
}catch(Exception e){
e.printStackTrace();
}
}
return null;
}
protected static byte[] decrypt(RSAPrivateKey privateKey,byte[] encBytes){
if(privateKey != null){
try{
Cipher cipher = Cipher.getInstance("RSA");
//根据私钥对Cipher对象进行初始化
cipher.init(Cipher.DECRYPT_MODE, privateKey);
//解密并将结果保存进resultBytes
byte[] decBytes = cipher.doFinal(encBytes);
return decBytes;
}catch(Exception e){
e.printStackTrace();
}
}
return null;
}
}
package rsa; public class PrivateKeyTest { public static void main(String[] args){ Test test = new Test(); // System.out.println(Test.privateKey); // String msg = new String(Test.resultBytes); byte[] decBytes = Test.decrypt(Test.privateKey, Test.resultBytes); String dec = new String(decBytes); System.out.println("用私钥加密后的结果是:" + dec); } }
标签:static string tostring rgs rate cep 广州市 ret encrypt
原文地址:http://www.cnblogs.com/kongxc/p/7890948.html