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//-----------------------------------------------------------------------
// <copyright file="AuthorizationServer.cs" company="Andrew Arnott">
// Copyright (c) Andrew Arnott. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
namespace DotNetOpenAuth.OAuth2 {
using System;
using System.Collections.Generic;
using System.Diagnostics.Contracts;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using DotNetOpenAuth.Messaging;
using DotNetOpenAuth.OAuth2.ChannelElements;
using DotNetOpenAuth.OAuth2.Messages;
/// <summary>
/// Authorization Server supporting the web server flow.
/// </summary>
public class AuthorizationServer : AuthorizationServerBase {
/// <summary>
/// Initializes a new instance of the <see cref="AuthorizationServer"/> class.
/// </summary>
/// <param name="authorizationServer">The authorization server.</param>
public AuthorizationServer(IAuthorizationServer authorizationServer)
: base(authorizationServer) {
Contract.Requires<ArgumentNullException>(authorizationServer != null, "authorizationServer");
}
/// <summary>
/// Reads in a client's request for the Authorization Server to obtain permission from
/// the user to authorize the Client's access of some protected resource(s).
/// </summary>
/// <param name="request">The HTTP request to read from.</param>
/// <returns>The incoming request, or null if no OAuth message was attached.</returns>
/// <exception cref="ProtocolException">Thrown if an unexpected OAuth message is attached to the incoming request.</exception>
public EndUserAuthorizationRequest ReadAuthorizationRequest(HttpRequestInfo request = null) {
if (request == null) {
request = this.Channel.GetRequestFromContext();
}
EndUserAuthorizationRequest message;
this.Channel.TryReadFromRequest(request, out message);
return message;
}
public void ApproveAuthorizationRequest(EndUserAuthorizationRequest authorizationRequest, string username, IEnumerable<string> scopes = null, Uri callback = null) {
Contract.Requires<ArgumentNullException>(authorizationRequest != null, "authorizationRequest");
var response = this.PrepareApproveAuthorizationRequest(authorizationRequest, username, callback);
// Customize the approved scope if the authorization server has decided to do so.
if (scopes != null) {
response.Scope.ResetContents(scopes);
}
this.Channel.Send(response);
}
public void RejectAuthorizationRequest(EndUserAuthorizationRequest authorizationRequest, Uri callback = null) {
Contract.Requires<ArgumentNullException>(authorizationRequest != null, "authorizationRequest");
var response = this.PrepareRejectAuthorizationRequest(authorizationRequest, callback);
this.Channel.Send(response);
}
public bool TryPrepareAccessTokenResponse(out IDirectResponseProtocolMessage response) {
return this.TryPrepareAccessTokenResponse(this.Channel.GetRequestFromContext(), out response);
}
public bool TryPrepareAccessTokenResponse(HttpRequestInfo httpRequestInfo, out IDirectResponseProtocolMessage response) {
Contract.Requires<ArgumentNullException>(httpRequestInfo != null, "httpRequestInfo");
var request = this.ReadAccessTokenRequest(httpRequestInfo);
if (request != null) {
// This convenience method only encrypts access tokens assuming that this auth server
// doubles as the resource server.
RSAParameters resourceServerPublicKey = this.AuthorizationServer.AccessTokenSigningPrivateKey;
response = this.PrepareAccessTokenResponse(request, resourceServerPublicKey);
return true;
}
response = null;
return false;
}
public AccessTokenRequestBase ReadAccessTokenRequest(HttpRequestInfo requestInfo = null) {
if (requestInfo == null) {
requestInfo = this.Channel.GetRequestFromContext();
}
AccessTokenRequestBase request;
this.Channel.TryReadFromRequest(requestInfo, out request);
return request;
}
public EndUserAuthorizationFailedResponse PrepareRejectAuthorizationRequest(EndUserAuthorizationRequest authorizationRequest, Uri callback = null) {
Contract.Requires<ArgumentNullException>(authorizationRequest != null, "authorizationRequest");
Contract.Ensures(Contract.Result<EndUserAuthorizationFailedResponse>() != null);
if (callback == null) {
callback = this.GetCallback(authorizationRequest);
}
var response = new EndUserAuthorizationFailedResponse(callback, authorizationRequest);
return response;
}
public EndUserAuthorizationSuccessResponseBase PrepareApproveAuthorizationRequest(EndUserAuthorizationRequest authorizationRequest, string username, Uri callback = null) {
Contract.Requires<ArgumentNullException>(authorizationRequest != null, "authorizationRequest");
Contract.Requires<ArgumentException>(!String.IsNullOrEmpty(username));
Contract.Ensures(Contract.Result<EndUserAuthorizationSuccessResponseBase>() != null);
if (callback == null) {
callback = this.GetCallback(authorizationRequest);
}
var client = this.AuthorizationServer.GetClientOrThrow(authorizationRequest.ClientIdentifier);
EndUserAuthorizationSuccessResponseBase response;
switch (authorizationRequest.ResponseType) {
case EndUserAuthorizationResponseType.AccessToken:
response = new EndUserAuthorizationSuccessAccessTokenResponse(callback, authorizationRequest);
break;
case EndUserAuthorizationResponseType.Both:
case EndUserAuthorizationResponseType.AuthorizationCode:
response = new EndUserAuthorizationSuccessAuthCodeResponse(callback, authorizationRequest);
break;
default:
throw ErrorUtilities.ThrowInternal("Unexpected response type.");
}
response.AuthorizingUsername = username;
return response;
}
protected Uri GetCallback(EndUserAuthorizationRequest authorizationRequest) {
Contract.Requires<ArgumentNullException>(authorizationRequest != null, "authorizationRequest");
Contract.Ensures(Contract.Result<Uri>() != null);
// Prefer a request-specific callback to the pre-registered one (if any).
if (authorizationRequest.Callback != null) {
return authorizationRequest.Callback;
}
var client = this.AuthorizationServer.GetClient(authorizationRequest.ClientIdentifier);
if (client.Callback != null) {
return client.Callback;
}
throw ErrorUtilities.ThrowProtocol(OAuthStrings.NoCallback);
}
}
}
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