//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//

package com.casic.util;

import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import javax.crypto.Cipher;
import org.apache.commons.codec.binary.Base64;

public class RSAUtils {
    public static String RSAPrivateKey = "RSAPrivateKey";
    public static String RSAPublicKey = "RSAPublicKey";

    public RSAUtils() {
    }

    public static void main(String[] args) throws Exception {
        Map<String, String> keyMap = new HashMap();
        genKeyPair();
        long ts = (new Date()).getTime() / 1000L;
        String timestamp = String.valueOf(ts);
        String message = "f3dwfgm2wg9g" + timestamp;
        System.out.println("随机生成的公钥为:" + (String)keyMap.get(0));
        System.out.println("随机生成的私钥为:" + (String)keyMap.get(1));
        String public_key = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCOUbkwDVAIPSZTwc00XNSoZRPr37BMB8f5dnuWPL3DvgI9E1l4gVysu80XP/qiZjSkeTWLsxt47jjUeTICrLcC23jebqyNrXU9LpqebVprq8tPjhjPK49GlOT0LuOvdaKRXK6R7izgMdyROQuekDpnn7qKfTi6tQWTVyS7Ryf6DQIDAQAB";
        String private_key = "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";
        String messageEn = encrypt(message, public_key);
        System.out.println(message + "\t加密后的字符串为:" + messageEn);
        String messageDe = decrypt(messageEn, private_key);
        System.out.println("还原后的字符串为:" + messageDe);
    }

    public static Map<String, String> genKeyPair() throws NoSuchAlgorithmException {
        Map<String, String> keyMap = new HashMap();
        KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance("RSA");
        keyPairGen.initialize(1024, new SecureRandom());
        KeyPair keyPair = keyPairGen.generateKeyPair();
        RSAPrivateKey privateKey = (RSAPrivateKey)keyPair.getPrivate();
        RSAPublicKey publicKey = (RSAPublicKey)keyPair.getPublic();
        String publicKeyString = new String(Base64.encodeBase64(publicKey.getEncoded()));
        String privateKeyString = new String(Base64.encodeBase64(privateKey.getEncoded()));
        keyMap.put(RSAPublicKey, publicKeyString);
        keyMap.put(RSAPrivateKey, privateKeyString);
        return keyMap;
    }

    public static String encrypt(String str, String publicKey) throws Exception {
        byte[] decoded = Base64.decodeBase64(publicKey);
        RSAPublicKey pubKey = (RSAPublicKey)KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(decoded));
        Cipher cipher = Cipher.getInstance("RSA");
        cipher.init(1, pubKey);
        String outStr = Base64.encodeBase64String(cipher.doFinal(str.getBytes("UTF-8")));
        return outStr;
    }

    public static String decrypt(String str, String privateKey) throws Exception {
        byte[] inputByte = Base64.decodeBase64(str.getBytes("UTF-8"));
        byte[] decoded = Base64.decodeBase64(privateKey);
        RSAPrivateKey priKey = (RSAPrivateKey)KeyFactory.getInstance("RSA").generatePrivate(new PKCS8EncodedKeySpec(decoded));
        Cipher cipher = Cipher.getInstance("RSA");
        cipher.init(2, priKey);
        String outStr = new String(cipher.doFinal(inputByte));
        return outStr;
    }
}