IdentityModel

A .NET standard helper library for claims-based identity, OAuth 2.0 and OpenID Connect.

DiscoveryClient

Client library to retrieve OpenID Connect discovery documents and key sets.

var discoveryClient = new DiscoveryClient("https://demo.identityserver.io");
var doc = await discoveryClient.GetAsync();

var tokenEndpoint = doc.TokenEndpoint;
var keys = doc.KeySet.Keys;

TokenClient

Client library for OAuth 2.0 and OpenID Connect token endpoints.

Features:

• Support for client credentials & resource owner password credential flow
• Support for exchanging authorization codes with tokens
• Support for refreshing tokens
• Support for extensions grants and assertions
• Support for client secrets via Basic Authentication, POST body and X.509 client certificates
• Extensible for custom parameters
• Parsing of token response messages

Example:

var client = new TokenClient(
    doc.TokenEndpoint,
    "client_id",
    "secret");
    
var response = await client.RequestClientCredentialsAsync("scope");
var token = response.AccessToken;

UserInfoClient

Client library for the OpenID Connect user info endpoint

var userInfoClient = new UserInfoClient(doc.UserInfoEndpoint);

var response = await userInfoClient.GetAsync(token);
var claims = response.Claims;

IntrospectionClient

Client library for the OAuth 2 introspection endpoint

var introspectionClient = new IntrospectionClient(
    doc.IntrospectionEndpoint,
    "scope_name",
    "scope_secret");

var response = await introspectionClient.SendAsync(
    new IntrospectionRequest { Token = token });

var isActive = response.IsActive;
var claims = response.Claims;

RequestUrl

Helper class for creating request URLs (e.g. for authorize and end_session).

var request = new RequestUrl(doc.AuthorizationEndpoint);
var url = request.CreateAuthorizeUrl(
    clientId:     "client",
    responseType: OidcConstants.ResponseTypes.CodeIdToken,
    responseMode: OidcConstants.ResponseModes.FormPost,
    redirectUri: "https://myapp.com/callback",
    state:       CryptoRandom.CreateUniqueId(),
    nonce:       CryptoRandom.CreateUniqueId());

AuthorizeResponse

Helper class for parsing OpenID Connect/OAuth 2 authorize responses

var response = new AuthorizeResponse(url);

var accessToken = response.AccessToken;
var idToken = response.IdentityToken;
var state = response.State;

Fluent API to access the X.509 Certificate store

e.g. do
var cert = X509.LocalMachine.My.SubjectDistinguishedName.Find("CN=sts").First();

Base64 URL encoder/decoder

Helper for working with URL safe base64 encodings

Epoch Time Extensions

Helper for converting DateTime and DateTimeOffset to/from Epoch Time

Time Constant Comparer

Helper for comparing strings without leaking timing information

JWT/OpenID Connect Claim Types

Constants for standard claim types used in JWT, OAuth 2.0 and OpenID Connect

OpenID Connect Constants

Constants for the OpenID Connect/OAuth 2 protocol