JSON Web Token (JWT) Implementation for .NET

This library supports generating and decoding JSON Web Tokens.

Installation

The easiest way to install is via NuGet. See here. Else, you can download and compile it yourself.

Usage

Creating Tokens

var payload = new Dictionary<string, object>() {
    { "claim1", 0 },
    { "claim2", "claim2-value" }
};
var secretKey = "GQDstcKsx0NHjPOuXOYg5MbeJ1XT0uFiwDVvVBrk";
string token = JWT.JsonWebToken.Encode(payload, secretKey, JWT.JwtHashAlgorithm.HS256);
Console.Out.WriteLine(token);

Output will be:

eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJjbGFpbTEiOjAsImNsYWltMiI6ImNsYWltMi12YWx1ZSJ9.8pwBI_HtXqI3UgQHQ_rDRnSQRxFL1SR8fbQoS-5kM5s

Verifying and Decoding Tokens

var token = "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJjbGFpbTEiOjAsImNsYWltMiI6ImNsYWltMi12YWx1ZSJ9.8pwBI_HtXqI3UgQHQ_rDRnSQRxFL1SR8fbQoS-5kM5s";
var secretKey = "GQDstcKsx0NHjPOuXOYg5MbeJ1XT0uFiwDVvVBrk";
try
{
    string jsonPayload = JWT.JsonWebToken.Decode(token, secretKey);
    Console.Out.WriteLine(jsonPayload);
}
catch (JWT.SignatureVerificationException)
{
    Console.Out.WriteLine("Invalid token!");
}

Output will be:

{"claim1":0,"claim2":"claim2-value"}

You can also deserialize the JSON payload directly to a .Net object with DecodeToObject:

var payload = JWT.JsonWebToken.DecodeToObject(token, secretKey) as IDictionary<string, object>;
Console.Out.WriteLine(payload["claim2"]);

which will output:

claim2-value