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

namespace Ewide.Core.Util
{
    public static class RSAHandler
    {
       
        /// <summary>
        /// 生成公私钥
        /// </summary>
        /// <param name="PrivateKeyPath"></param>
        /// <param name="PublicKeyPath"></param>
        public static void RSAKey(string PrivateKeyPath, string PublicKeyPath)
        {
            RSACryptoServiceProvider provider = new RSACryptoServiceProvider();
            CreatePrivateKeyXML(PrivateKeyPath, provider.ToXmlString(true));
            CreatePublicKeyXML(PublicKeyPath, provider.ToXmlString(false));
        }
        /// <summary>
        /// 创建公钥文件
        /// </summary>
        /// <param name="path"></param>
        /// <param name="publickey"></param>
        public static void CreatePublicKeyXML(string path, string publickey)
        {
            using (FileStream publickeyxml = new FileStream(path, FileMode.Create))
            {
                using (StreamWriter sw = new StreamWriter(publickeyxml))
                {
                    sw.WriteLine(publickey);
                }
            }
        }

        /// <summary>
        /// 创建私钥文件
        /// </summary>
        /// <param name="path"></param>
        /// <param name="privatekey"></param>
        public static void CreatePrivateKeyXML(string path, string privatekey)
        {
            using (FileStream privatekeyxml = new FileStream(path, FileMode.Create))
            {
                using (StreamWriter sw = new StreamWriter(privatekeyxml))
                {
                    sw.WriteLine(privatekey);
                }
            }
        }

        /// <summary>
        /// RSA加密
        /// </summary>
        /// <param name="content"></param>
        /// <returns></returns>
        public static string RSAEncrypt(string content)
        {
            string publickey = @"<RSAKeyValue><Modulus>tu98wMoo297l+juulU4a3Xx7c2SZ93f0gTPKohE0uz4o8jWN8zXnAAfhf6MMTlkgf+qIwaORLtBQohDcX6Xp02Qe7Cq2LujVR+YJHxy2uo8+KTc5Rj/d0OkTjeCozGaJQH0XrwUO7w+rDnyXzA52IvMZPnUV3KnOj1mPH0IhrOU=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";

            RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
            byte[] cipherbytes;
            rsa.FromXmlString(publickey);
            cipherbytes = rsa.Encrypt(Encoding.UTF8.GetBytes(content), false);
            return Convert.ToBase64String(cipherbytes);
        }

        /// <summary>
        /// RSA解密
        /// </summary>
        /// <param name="content"></param>
        /// <returns></returns>
        public static string RSADecrypt(string content)
        {
            string privatekey = @"<RSAKeyValue><Modulus>tu98wMoo297l+juulU4a3Xx7c2SZ93f0gTPKohE0uz4o8jWN8zXnAAfhf6MMTlkgf+qIwaORLtBQohDcX6Xp02Qe7Cq2LujVR+YJHxy2uo8+KTc5Rj/d0OkTjeCozGaJQH0XrwUO7w+rDnyXzA52IvMZPnUV3KnOj1mPH0IhrOU=</Modulus><Exponent>AQAB</Exponent><P>7yKLJO9dobe7pNW3ob+Vse8kvlA+PObDrZNqFxUTLyXoAeHDnwz3BjJ2EVUPNJHV5F1/KPLTvADIjDrdB1qcbw==</P><Q>w9ZK0SHBddtE91skFFS72YDmxzmXumSuUyREStVul9ke0oU2HjcZA915bmR0Zrh1RzO3y1w9zXVn+GdZGjyd6w==</Q><DP>ncA67E2fhcwv0+hMcD5zYOLyaT2EISbWFQ43ISz879BgwcUOCEFEP+lP69Uh57sAz9pBxWCS/uXBZoh6QJysrw==</DP><DQ>vbC8F4YS1g3l55Koh+jra+qnnyHyDeGn2XCvlazWys7MRC40FWBZIp1MGdnDxhu1vZoi1SAr3O90HfA9JmTAsQ==</DQ><InverseQ>00v2vMCcgXy78eMby7R6zfZzacVnVFO2WeyxYF7pjrXYYP+C4JSJkWpy6JGLWbgZrK8HAuRguJmdRi8K2KiYWg==</InverseQ><D>rV3nb9nmwQDMGMrI2GyN30uivygfFj0TdgK8Tb1aqPzu1yRT46M4yXmuhkTiW7nxp+iANGssIx5+3Ch4gRj+r6BgBPldWNErK95a2v2Ae1+EzfVf21ybguBYeUVnV9c8qwoodZSVOajZapOgoS6s5TEOxHWRcF22AiFuaD1Tl90=</D></RSAKeyValue>";

            RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
            byte[] cipherbytes;
            try
            {   //很有可能是报文被修改 情况很小
                rsa.FromXmlString(privatekey);
                cipherbytes = rsa.Decrypt(Convert.FromBase64String(content), false);
                return Encoding.UTF8.GetString(cipherbytes);
            }
            catch 
            {
                throw Oops.Oh(ErrorCode.D1000);
            }
        }
    }
}