公钥私钥生成工具

来源：互联网发布：大数据应用软件编辑：程序博客网时间：2024/05/24 04:36

/**
*
*/
package com.hlmedicals.app.util;

import java.security.Key;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.util.HashMap;
import java.util.Map;

import com.itextpdf.xmp.impl.Base64;

/**
* @author dell
*
*/
public class Keys {

        public static final String KEY_ALGORITHM = "RSA";

        public static final String SIGNATURE_ALGORITHM = "MD5withRSA";

        private static final String PUBLIC_KEY = "RSAPublicKey";

        private static final String PRIVATE_KEY = "RSAPrivateKey";



   public static void main(String[] args) {

           Map<String, Object> keyMap;

           try {

           keyMap = initKey();

           String publicKey = getPublicKey(keyMap);

           System.out.println(publicKey);

           String privateKey = getPrivateKey(keyMap);

           System.out.println(privateKey);

           } catch (Exception e) {

           e.printStackTrace();

       }

   }

   public static String getPublicKey(Map<String, Object> keyMap) throws Exception {

             Key key = (Key) keyMap.get(PUBLIC_KEY);

             byte[] publicKey = key.getEncoded();

            // return encryptBASE64(key.getEncoded());

             return new String(new Base64().encode(publicKey));
   }

   public static String getPrivateKey(Map<String, Object> keyMap) throws Exception {

             Key key = (Key) keyMap.get(PRIVATE_KEY);

             byte[] privateKey =key.getEncoded();

             //return encryptBASE64(key.getEncoded());
             return new String(new Base64().encode(privateKey));
   }


//
//        public static byte[] decryptBASE64(String key) throws Exception {
//
//            return (new Base64()).decodeBuffer(key);
//
//        }
//
//
//
//        public static String encryptBASE64(byte[] key) throws Exception {
//
//            return (new BASE64Encoder()).encodeBuffer(key);
//
//        }



   public static Map<String, Object> initKey() throws Exception {

   KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance(KEY_ALGORITHM);

   keyPairGen.initialize(1024);

   KeyPair keyPair = keyPairGen.generateKeyPair();

   RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();

   RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();

   Map<String, Object> keyMap = new HashMap<String, Object>(2);

   keyMap.put(PUBLIC_KEY, publicKey);

   keyMap.put(PRIVATE_KEY, privateKey);

   return keyMap;

   }
}

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