using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    public class Rsa
    {
        /// <summary>
        ///  生成key  方法1 
        /// </summary>
        /// <returns></returns>
        public static (string publickey, string privateKey) GetBase64keys()
        {
            RSACryptoServiceProvider rSA = new RSACryptoServiceProvider();
            string publicKey = Convert.ToBase64String(rSA.ExportCspBlob(false));
            string privateKey = Convert.ToBase64String(rSA.ExportCspBlob(false));
            return (publickey: publicKey, privateKey: privateKey);
        }
        /// <summary>
        ///   生成key 方法2
        /// </summary>
        /// <returns></returns>
        public static (string publickey, string privateKey) GetToXmlkeys()
        {
            RSACryptoServiceProvider rSA = new RSACryptoServiceProvider();
            string publicKey = rSA.ToXmlString(false);
            string privateKey = rSA.ToXmlString(true);
            return (publickey: publicKey, privateKey: privateKey);
        }
        public static string EncryptByBase64(string privateKey, string text)
        {
            RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
            rsa.ImportCspBlob(Convert.FromBase64String(privateKey));
            var bytes = Encoding.UTF8.GetBytes(text);
            var result = rsa.Encrypt(bytes, false);
            return Encoding.UTF8.GetString(result);
        }
        public static string DecryptByBase64(string publicKey, string text)
        {
            RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
            rsa.ImportCspBlob(Convert.FromBase64String(publicKey));
            var bytes = Encoding.UTF8.GetBytes(text);
            var result = rsa.Decrypt(bytes, false);
            return Encoding.UTF8.GetString(result);
        }
    }
}