using UnityEngine;
using System.Collections;
using System.Security.Cryptography;
using System.Text;
using System;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Security;

public class RSAPro
{
    string publickey;
    string privatekey;
    string RSAed;
    public string mingwen;
    RSACryptoServiceProvider rsa;
    
 
    /// <summary>
    /// 加密
    /// </summary>
    /// <param name="publickey">公钥</param>
    /// <param name="content">所加密的内容</param>
    /// <returns>加密后的内容</returns>
  public  static string RSAEncrypt(string publickey, string content)
    {
        RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
        byte[] cipherbytes;
        rsa.FromXmlString(publickey);
        //rsa.FromXmlString("<param name='publickey'>"+publickey+"</param>");
        cipherbytes = rsa.Encrypt(Encoding.UTF8.GetBytes(content), false);
        return Convert.ToBase64String(cipherbytes); ;
    }
 
   /// <summary>
   /// 解密
   /// </summary>
   /// <param name="privatekey">私钥</param>
   /// <param name="content">加密后的内容</param>
   /// <returns>解密后的内容</returns>
   public static string RSADecrypt(string privatekey, string content)
    {
        RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
        byte[] cipherbytes;
        rsa.FromXmlString(privatekey);
        cipherbytes = rsa.Decrypt(Convert.FromBase64String(content), false);
        return Encoding.UTF8.GetString(cipherbytes);
    }
   /// <summary>
   /// base64 public key string -> xml public key
   /// </summary>
   /// <param name="pubilcKey"></param>
   /// <returns></returns>
   public static string ToXmlPublicKey(string pubilcKey)
   {
       RsaKeyParameters p =PublicKeyFactory.CreateKey(Convert.FromBase64String(pubilcKey)) as RsaKeyParameters;
       using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider())
       {
           RSAParameters rsaParams = new RSAParameters
           {
               Modulus = p.Modulus.ToByteArrayUnsigned(),
               Exponent = p.Exponent.ToByteArrayUnsigned()
           };
           rsa.ImportParameters(rsaParams);
           return rsa.ToXmlString(false);
       }
   }
}