package com.util;
import java.security.InvalidKeyException;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException; 密码字符串是什么
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
pto.BadPaddingException;
pto.Cipher;
pto.IllegalBlockSizeException;
pto.NoSuchPaddingException;
public class EncrypRSA {
/**
* 加密
* @param publicKey
* @param srcBytes
* @return
* @throws NoSuchAlgorithmException
* @throws NoSuchPaddingException
* @throws InvalidKeyException
* @throws IllegalBlockSizeException
* @throws BadPaddingException
*/
protected byte[] encrypt(RSAPublicKey publicKey,byte[] srcBytes) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException{
if(publicKey!=null){
//Cipher负责完成加密或解密工作,基于RSA
Cipher cipher = Instance("RSA");
//根据公钥,对Cipher对象进行初始化
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
byte[] resultBytes = cipher.doFinal(srcBytes);
return resultBytes;
}
return null;
}
/**
* 解密
* @param privateKey
* @param srcBytes
* @return
* @throws NoSuchAlgorithmException
* @throws NoSuchPaddingException
* @throws InvalidKeyException
* @throws IllegalBlockSizeException
* @throws BadPaddingException
*/
protected byte[] decrypt(RSAPrivateKey privateKey,byte[] srcBytes) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException{
if(privateKey!=null){
//Cipher负责完成加密或解密工作,基于RSA
Cipher cipher = Instance("RSA");
//根据公钥,对Cipher对象进行初始化
cipher.init(Cipher.DECRYPT_MODE, privateKey);
byte[] resultBytes = cipher.doFinal(srcBytes);
return resultBytes;
}
return null;
}
/**
* @param args
* @throws NoSuchAlgorithmException
* @throws BadPaddingException
* @throws IllegalBlockSizeException
* @throws NoSuchPaddingException
* @throws InvalidKeyException
*/
public static void main(String[] args) throws NoSuchAlgorithmException, InvalidKeyException, NoSuchPaddingException, IllegalBlockSizeException, BadPaddingException {
EncrypRSA rsa = new EncrypRSA();
String msg = "wqqwqwqewsd1212";
//KeyPairGenerator类用于生成公钥和私钥对,基于RSA算法生成对象
KeyPairGenerator keyPairGen = Instance("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 = ateKeyPair();
//得到私钥
RSAPrivateKey privateKey = (Private();
//得到公钥
RSAPublicKey publicKey = (Public();
//用公钥加密
byte[] srcBytes = Bytes();
byte[] resultBytes = pt(publicKey, srcBytes);
//用私钥解密
byte[] decBytes = rsa.decrypt(privateKey, resultBytes);
System.out.println("明文是:" + msg);
System.out.println("加密后是:" + new String(resultBytes));
System.out.println("解密后是:" + new String(decBytes));
}
}
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