Bringing SWT Support back to Thinktecture IdentityModel

When Microsoft released the JWT library, I thought that’s a good opportunity to remove the SWT support from IdentityModel. But it turns out, there are still scenarios for SWT – so I refreshed my old code and added the SWT token and token handler back.

Note: I am now using the NamedKeyIssuerTokenResolver from the JWT library which is very useful here and allowed me to remove a lot of my custom code.

Here’s how it works – Creating a token:

public SimpleWebToken CreateToken(byte[] key)

{

    var descripter = new SecurityTokenDescriptor

    {

        TokenIssuerName = “http://issuer “,

        AppliesToAddress = “http://audience “,

        Lifetime = new Lifetime(DateTime.Now, DateTime.Now.AddMinutes(5)),

        Subject = new ClaimsIdentity(GetClaims()),

        SigningCredentials = new HmacSigningCredentials(key),

    };

    var handler = new SimpleWebTokenHandler();

    return handler.CreateToken(descripter) as SimpleWebToken;

}

Validating a token

private static void ValidateSwtToken(string tokenString)

{

    var configuration = new SecurityTokenHandlerConfiguration();

    var validationKey = new InMemorySymmetricSecurityKey(
      Convert.FromBase64String(Constants.IdSrv.SigningKey));

    // audience validation

    configuration.AudienceRestriction.AllowedAudienceUris.Add(
      new Uri(Constants.Realm));

    // signature & issuer validation

    var resolverTable = new Dictionary<string, IList<SecurityKey>>

    {

        { Constants.IdSrv.IssuerUri, new SecurityKey[] { validationKey } }

    };

    configuration.IssuerTokenResolver = 
      new NamedKeyIssuerTokenResolver(resolverTable);

    var handler = new SimpleWebTokenHandler();

    handler.Configuration = configuration;

    var token = handler.ReadToken(tokenString);

    var ids = handler.ValidateToken(token);

    "\n\nValidated Claims:".ConsoleYellow();

    foreach (var claim in ids.First().Claims)

    {

        Console.WriteLine("{0}\n {1}\n", claim.Type, claim.Value);

    }

}