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This is a C# library for Authlete Web APIs.

Authlete is a cloud service that provides an implementation of OAuth 2.0 & OpenID Connect. By using the Web APIs provided by Authlete, you can develop a DB-less authorization server and/or OpenID provider. "DB-less" here means that you don't have to manage a database server that stores authorization data (e.g. access tokens), settings of authorization servers and settings of client applications. These data are stored in the Authlete server on cloud.

Please read New Architecture of OAuth 2.0 and OpenID Connect Implementation for details about the architecture of Authlete. True engineers will love the architecture ;-)

The primary advantage of this architecture is in that the backend service can focus on implementing OAuth 2.0 and OpenID Connect without caring about other components such as identity management, user authentication, login session management, API management and fraud detection. And, consequently, it leads to another major advantage which enables the backend service (implementation of OAuth 2.0 and OpenID Connect) to be combined with any solution of other components and thus gives flexibility to frontend server implementations.


Apache License, Version 2.0

Source Code (authlete-csharp)

API Reference (authlete-csharp)

API Reference (Authlete)





How To Get IAuthleteApi

All the methods to communicate with Authlete Web APIs are gathered in IAuthleteApi interface. Currently, AuthleteApi class is the only class that implements the interface.

The constructor of AuthleteApi class requires an implementation of IAuthleteConfiguration interface. Once you prepare an implementation of IAuthleteConfiguration interface, you can create an AuthleteApi instance as follows.

// Prepare configuration to access Authlete Web APIs.
IAuthleteConfiguration conf = ...;

// Create an instance that implements IAuthleteApi.
IAuthleteApi api = new AuthleteApi(conf);

IAuthleteConfiguration is an interface that holds configuration values to access Authlete Web APIs such as the URL of an Authlete server and API credentials of a service. To be concrete, the interface has the following properties.

Property Description
BaseUrl URL of an Authlete server
ServiceApiKey API key of a service
ServiceApiSecret API secret of a service
ServiceOwnerApiKey API key of your account
ServiceOwnerApiSecret API secret of your account

authlete-csharp includes three implementations of IAuthleteConfiguration interface as listed below.

Class Description
AuthleteEnvConfiguration Configuration by environment variables
AuthletePropertiesConfiguration Configuration by a properties file
AuthleteSimpleConfiguration Configuration by C# properties


Among the three implementations of IAuthleteConfiguration interface, this section explains AuthletePropertiesConfiguration class.

AuthletePropertiesConfiguration class provides a mechanism to use a properties file to set configuration values to access Authlete Web APIs. Properties file here is a kind of configuration files used in Java world. The specification of the file format is described in the JavaDoc of java.util.Properties.load( authlete-csharp includes an implementation that can interpret the format (Authlete.Util.PropertiesLoader).

AuthletePropertiesConfiguration class has three constructors. The following examples show the usage of the constructors.

// (1) Constructor with no argument. This tries to read a file
//     named "". The environment variable,
//     AUTHLETE_CONFIGURATION_FILE, can be used to specify
//     another different file name.
IAuthleteConfiguration conf =
    new AuthletePropertiesConfiguration();

// (2) Constructor with the name of a configuration file.
IAuthleteConfiguration conf =
    new AuthletePropertiesConfiguration("");

// (3) Constructor with a TextReader.
using (TextReader reader = File.OpenText(""))
    IAuthleteConfiguration conf =
        new AuthletePropertiesConfiguration(reader);

AuthletePropertiesConfiguration class expects entries in the table below to be found in the given configuration file.

Property Key Description
base_url URL of an Authlete server
service.api_key API key of a service
service.api_secret API secret of a service
service_owner.api_key API key of your account
service_owner.api_secret API secret of your account

Below is an example of a configuration file.

base_url                 =
service_owner.api_key    = 1532787510
service_owner.api_secret = 9Y0ZARGatedJRhsYLNfiK_aKQIBCug2O3JQU6srZrpk
service.api_key          = 9463955934
service.api_secret       = AAw0rner_wjRCpk-y1A6J9s20Bvez3GxEBoL9jOJVR0

IAuthleteApi Settings

Settings property of IAuthleteApi returns an instance of ISettings interface whereby you can adjust the behaviors of the implementation of IAuthleteApi interface.

// Get an implementation of IAuthleteApi interface.
IAuthleteApi api = ...;

// Get the instance which holds settings of the implementation.
ISettings settings = api.Setting;

// Set a network timeout.
// In the current implementation, the value set to the Timeout
// property is passed to HttpClient.Timeout.
settings.Timeout = TimeSpan.FromSeconds(5);

IAuthleteApi Method Categories

Methods in the IAuthleteApi interface can be divided into some categories.

  1. Methods for Authorization Endpoint Implementation
- `Authorization(AuthorizationRequest request)`
- `AuthorizationFail(AuthorizationFailRequest request)`
- `AuthorizationIssue(AuthorizationIssueRequest request)`
  1. Methods for Token Endpoint Implementation
- `Token(TokenRequest request)`
- `TokenFail(TokenFailRequest request)`
- `TokenIssue(TokenIssueRequest request)`
  1. Methods for Service Management
- `CreateService(Service service)`
- `DeleteService(long serviceApiKey)`
- `GetService(long serviceApiKey)`
- `GetServiceList()`
- `GetServiceList(int start, int end)`
- `UpdateService(Service service)`
  1. Methods for Client Application Management
- `CreateClient(Client client)`
- `DeleteClient(long clientId)`
- `GetClient(long clientId)`
- `GetClientList()`
- `GetClientList(string developer)`
- `GetClientList(int start, int end)`
- `GetClientList(string developer, int start, int end)`
- `UpdateClient(Client client)`
- `RefreshClientSecret(long clientId)`
- `RefreshClientSecret(string clientIdentifier)`
- `UpdateClientSecret(long clientId, string clientSecret)`
- `UpdateClientSecret(string clientIdentifier, string clientSecret)`
  1. Methods for Access Token Introspection
- `Introspection(IntrospectionRequest request)`
- `StandardIntrospection(StandardIntrospectionRequest request)`
  1. Methods for Revocation Endpoint Implementation
- `Revocation(RevocationRequest request)`
  1. Methods for User Info Endpoint Implementation
- `Userinfo(UserInfoRequest request)`
- `UserinfoIssue(UserInfoIssueRequest request)`
  1. Methods for JWK Set Endpoint Implementation
- `GetServiceJwks()`
- `GetServiceJwks(bool pretty, bool includePrivateKeys)`
  1. Methods for OpenID Connect Discovery
- `GetServiceConfiguration()`
- `GetServiceConfiguration(bool pretty)`
  1. Methods for Token Operations
- `TokenCreate(TokenCreateRequest request)`
- `TokenUpdate(TokenUpdateRequest request)`
  1. Methods for Records of Granted Scopes
- `GetGrantedScopes(long clientId, string subject)`
- `DeleteGrantedScopes(long clientId, string subject)`
  1. Methods for Authorization Management on a User-Client Combination Basis
- `DeleteClientAuthorization(long clientId, string subject)`
- `GetClientAuthorizationList(ClientAuthorizationGetListRequest request)`
- `UpdateClientAuthorization(long clientId, ClientAuthorizationUpdateRequest request)`
  1. Methods for CIBA (Client Initiated Backchannel Authentication)
- `BackchannelAuthentication(BackchannelAuthenticationRequest request)`
- `BackchannelAuthenticationIssue(BackchannelAuthenticationIssueRequest request)`
- `BackchannelAuthenticationFail(BackchannelAuthenticationFailRequest request)`
- `BackchannelAuthenticationComplete(BackchannelAuthenticationCompleteRequest request)`


The following code snippet is an example to get the list of your services. Each service corresponds to an authorization server.

// Prepare configuration to access Authlete APIs.
// AuthleteSimpleConfiguration is used here as one
// implementation of IAuthleteConfiguration interface.
// As described above, there are other implementations
// such as AuthletePropertiesConfiguraiton.
IAuthleteConfiguration conf = new AuthleteSimpleConfiguration
    BaseUrl               = "",
    ServiceOwnerApiKey    = "1532787510",
    ServiceOwnerApiSecret = "9Y0ZARGatedJRhsYLNfiK_aKQIBCug2O3JQU6srZrpk",
    ServiceApiKey         = "9463955934",
    ServiceApiSecret      = "AAw0rner_wjRCpk-y1A6J9s20Bvez3GxEBoL9jOJVR0"

// Get an implementation of IAuthleteApi interface.
// Currently, AuthleteApi is the only class that
// implements the IAuthleteApi interface.
IAuthleteApi api = new AuthleteApi(conf);

// Get the list of services.
ServiceListResponse response = await api.GetServiceList();


It is possible to develop an authorization server and/or OpenID provider only with the methods of IAuthleteApi interface, but the task will become much easier if you use utility classes in Authlete.Handler namespace.

You can find the usage of the handlers in csharp-oauth-server and csharp-resource-server. They are sample implementations of an authorization server and a resource server. OAuth 2.0 and OpenID Connect implementation in C# (Authlete) is an article about the two sample servers.

How To Test

$ cd Authlete.Tests
$ dotnet test

How To Release

1. Update Documents

Update and Update and, too, if necessary.

2. Update Version

In Visual Studio, open "Options" menu of the Authlete project. In the window titled "Project Options - Authlete", go to "NuGet Package" -> "Metadata" -> "General" tab. Update the value in the "Version:" field.

Or, edit the value of <PackageVersion> in Authlete/Authlete.csproj file directly.

3. Commit Version

$ git add Authlete/Authlete.csproj
$ git commit -m 'Updated PackageVersion to X.Y.Z.'
$ git push

4. Generate Package

$ dotnet pack

A .nupkg file will be created under bin/Debug directory.

5. Publish Package

$ nuget push bin/Debug/Authlete.Authlete.X.Y.Z.nupkg $KEY \

The value of $KEY on the command line is an API key issued by See Publishing packages for details.

The published package will appear at, but it will take some minutes.

6. Update API Reference

$ cd ..
$ rm -rf html
$ doxygen

7. Publish API Reference

$ mkdir -p ../docs
$ cd ../docs
$ git clone
$ cd authlete-csharp
$ git checkout gh-pages
$ rm -rf *
$ cp -r ../../authlete-csharp/html/* .
$ git add .
$ git commit -m 'Updated for version X.Y.Z'
$ git push origin gh-pages


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