package com.yb.helper;

import org.apache.commons.codec.binary.Base64;

import javax.crypto.Cipher;
import java.io.IOException;
import java.security.KeyFactory;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.X509EncodedKeySpec;

public class RsaHelper {
    //    RsA秘钥加密
    public static String encrypt(String key, String str) throws Exception {
        try {
            byte[] decoded = Base64.decodeBase64(key + "");

            RSAPublicKey pubKey = (RSAPublicKey) KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(decoded));

            // RSA加密：RSA/ECB/NoPadding
            Cipher cipher = Cipher.getInstance("RSA");
            cipher.init(Cipher.ENCRYPT_MODE, pubKey);

            String outStr = Base64.encodeBase64String(cipher.doFinal(str.getBytes("UTF-8")));

            return outStr;
        }  catch (IOException e) {
            System.out.println(e.getMessage());
            return null;
        }
        // Base64编码的公钥

    }

}