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@ -3,12 +3,11 @@ package com.yihu.jw.security.utils;
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import org.apache.commons.codec.binary.Base64;
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import javax.crypto.Cipher;
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import java.security.KeyPair;
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import java.security.KeyPairGenerator;
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import java.security.SecureRandom;
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import java.security.Security;
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import java.security.*;
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import java.security.interfaces.RSAPrivateKey;
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import java.security.interfaces.RSAPublicKey;
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import java.security.spec.PKCS8EncodedKeySpec;
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import java.security.spec.X509EncodedKeySpec;
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public class RSAUtils {
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@ -45,6 +44,53 @@ public class RSAUtils {
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return new String(decrypt(Base64.decodeBase64(string),keyPair));
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}
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/**
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* RSA公钥加密
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*
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* @param str
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* 加密字符串
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* @param publicKey
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* 公钥
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* @return 密文
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* @throws Exception
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* 加密过程中的异常信息
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*/
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public static String encrypt( String str, String publicKey ) throws Exception{
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//base64编码的公钥
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byte[] decoded = Base64.decodeBase64(publicKey);
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RSAPublicKey pubKey = (RSAPublicKey) KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(decoded));
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//RSA加密
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Cipher cipher = Cipher.getInstance("RSA");
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cipher.init(Cipher.ENCRYPT_MODE, pubKey);
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String outStr = Base64.encodeBase64String(cipher.doFinal(str.getBytes("UTF-8")));
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return outStr;
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}
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/**
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* RSA私钥解密
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*
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* @param str
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* 加密字符串
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* @param privateKey
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* 私钥
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* @return 铭文
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* @throws Exception
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* 解密过程中的异常信息
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*/
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public static String decrypt(String str, String privateKey) throws Exception{
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//64位解码加密后的字符串
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byte[] inputByte = Base64.decodeBase64(str.getBytes("UTF-8"));
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//base64编码的私钥
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byte[] decoded = Base64.decodeBase64(privateKey);
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RSAPrivateKey priKey = (RSAPrivateKey) KeyFactory.getInstance("RSA").generatePrivate(new PKCS8EncodedKeySpec(decoded));
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//RSA解密
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Cipher cipher = Cipher.getInstance("RSA");
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cipher.init(Cipher.DECRYPT_MODE, priKey);
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String outStr = new String(cipher.doFinal(inputByte));
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return outStr;
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}
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private static byte[] decrypt(byte[] string,KeyPair keyPair) {
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try {
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Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
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@ -60,14 +106,19 @@ public class RSAUtils {
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}
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}
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// public static void main(String[] args) {
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//
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// KeyPair keyPair = initKey();
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// // 生成public key
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// System.out.println(generateBase64PublicKey(keyPair));
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//
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// // 解密
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// System.out.println(decryptBase64("wAfY9JkoKay9SxcPIs1FcG+t6sR+wYwAs/mh9DpfcBraxzqoZdb9LyaAigzFQ0EKck9OyHL0dhv+Uxuw5hHw6CPT0B2Z0i1gwrjDUNaL1gWvqt1pDJVGrIYPLJSjs9xktFhY1jbxQgXGjyCt06Rwid5sJknw90AUO0CyQulfipg=",keyPair));
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// }
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public static void main(String[] args) throws Exception{
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KeyPair keyPair = getKey();
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// 生成public key
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String privateKeyString = new String(Base64.encodeBase64((keyPair.getPrivate().getEncoded())));
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String publicKeyString = new String(Base64.encodeBase64(keyPair.getPublic().getEncoded()));
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System.out.println("publicKeyString="+publicKeyString);
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System.out.println("privateKeyString="+privateKeyString);
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String str = "123ysj*#%";
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String encryptStr = encrypt(str,publicKeyString);
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// 字符串解密
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System.out.println(decrypt(encryptStr,privateKeyString));
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}
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}
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