using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Encodings;
using Org.BouncyCastle.Crypto.Engines;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Security;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Text.RegularExpressions;

namespace WpfApp1.Util
{
    public static class RSAHelper
    {
        /// <summary>
        /// 公钥解密
        /// </summary>
        /// <param name="content">明文</param>
        /// <param name="key">公钥</param>
        public static string DecryptByPublicKey(string content, string key)
        {
            content = content.Replace("\r", "").Replace("\n", "").Replace(" ", "");
            //非对称加密算法，加解密用  
            IAsymmetricBlockCipher engine = new Pkcs1Encoding(new RsaEngine());

            //解密  
            try
            {
                RsaKeyParameters publicKeyParam = (RsaKeyParameters)PublicKeyFactory.CreateKey(Convert.FromBase64String(key));
                engine.Init(false, publicKeyParam);
                byte[] byteData = Convert.FromBase64String(content);
                var ResultData = engine.ProcessBlock(byteData, 0, byteData.Length);
                return System.Text.Encoding.UTF8.GetString(ResultData);
            }
            catch (Exception ex)
            {
                UnityEngine.Debug.LogError(ex.Message);
                return "";
            }
        }
    }
}