using Microsoft.IdentityModel.JsonWebTokens;

using Microsoft.IdentityModel.Tokens;

using System;

using System.Collections.Generic;

using System.Security.Claims;

using System.Security.Cryptography;

​

namespace ConsoleApp1

{

    class Program

    {

        static void Main(string[] args)

        {

            var key = new RsaSecurityKey(RSA.Create(2048));

​

            var privateKey = key.Rsa.ExportRSAPrivateKey();

            var publicKey = key.Rsa.ExportSubjectPublicKeyInfo();

​

​

            var signing = new SigningCredentials(key, SecurityAlgorithms.RsaSha512);

​

            var handler = new JsonWebTokenHandler();

​

            SigningCredentials signingCredentials = new SigningCredentials(key, "RSA512");

​

            var now = DateTime.UtcNow;

​

            var descriptor = new SecurityTokenDescriptor

            {

                Issuer = "dotnet",

                Audience = "app",

                IssuedAt = now,

                NotBefore = now,

                Expires = now.AddHours(24),

                Subject = new ClaimsIdentity(new List<Claim> { new Claim("email", "dotnet@email.com") }),

                SigningCredentials = signing

            };

​

            string jwtToken = handler.CreateToken(descriptor);

​

            Console.WriteLine(jwtToken);

            Console.WriteLine();

            Console.WriteLine();

            Console.WriteLine("Private");

            Console.WriteLine($"-----BEGIN RSA PRIVATE KEY-----\r\n{System.Convert.ToBase64String(privateKey)}\r\n-----END RSA PRIVATE KEY-----");

            Console.WriteLine("Public");

            Console.WriteLine($"-----BEGIN PUBLIC KEY-----\r\n{System.Convert.ToBase64String(publicKey)}\r\n-----END PUBLIC KEY-----");

        }

    }

}

​