using System;

using Microsoft.IdentityModel.Tokens;

public class Program

{

    public static void Main()

    {

        var token = "";

        var result = VerifyTokenWithAsymmetricKey(token);

        Console.WriteLine(result);

    }

    public static bool VerifyTokenWithAsymmetricKey(string token)

        {

​

            Microsoft.IdentityModel.Logging.IdentityModelEventSource.ShowPII = true;

​

            if (string.IsNullOrEmpty(token))

            {

                return false;

            }

​

            var securityKey = Convert.FromBase64String("");

            System.Security.Cryptography.RSA rsa = System.Security.Cryptography.RSA.Create();

            rsa.ImportRSAPublicKey(securityKey, out _);

​

​

            var vParam = new TokenValidationParameters

            {

                ValidateIssuer = true,

                ValidateAudience = false,

                ValidateIssuerSigningKey = true,

                ValidIssuer = "user.authority",

                IssuerSigningKey = new RsaSecurityKey(rsa)

            };

​

            var jsth = new Microsoft.IdentityModel.JsonWebTokens.JsonWebTokenHandler();

​

​

            if (jsth.CanReadToken(token))

            {

                var result = jsth.ValidateToken(token, vParam);

​

                if (result.IsValid)

                    return true;

            }

​

            return false;

​

        }

}