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//-----------------------------------------------------------------------
// <copyright file="ServiceProvider.cs" company="Andrew Arnott">
// Copyright (c) Andrew Arnott. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
namespace DotNetOAuth {
using System;
using System.Globalization;
using System.Web;
using DotNetOAuth.ChannelElements;
using DotNetOAuth.Messages;
using DotNetOAuth.Messaging;
using DotNetOAuth.Messaging.Bindings;
/// <summary>
/// A web application that allows access via OAuth.
/// </summary>
/// <remarks>
/// <para>The Service Provider’s documentation should include:</para>
/// <list>
/// <item>The URLs (Request URLs) the Consumer will use when making OAuth requests, and the HTTP methods (i.e. GET, POST, etc.) used in the Request Token URL and Access Token URL.</item>
/// <item>Signature methods supported by the Service Provider.</item>
/// <item>Any additional request parameters that the Service Provider requires in order to obtain a Token. Service Provider specific parameters MUST NOT begin with oauth_.</item>
/// </list>
/// </remarks>
public class ServiceProvider {
/// <summary>
/// Initializes a new instance of the <see cref="ServiceProvider"/> class.
/// </summary>
/// <param name="serviceDescription">The endpoints and behavior on the Service Provider.</param>
/// <param name="tokenManager">The host's method of storing and recalling tokens and secrets.</param>
internal ServiceProvider(ServiceProviderDescription serviceDescription, ITokenManager tokenManager) {
if (serviceDescription == null) {
throw new ArgumentNullException("serviceDescription");
}
if (tokenManager == null) {
throw new ArgumentNullException("tokenManager");
}
var signingElement = serviceDescription.CreateTamperProtectionElement();
signingElement.SignatureVerificationCallback = this.TokenSignatureVerificationCallback;
INonceStore store = new NonceMemoryStore(StandardExpirationBindingElement.DefaultMaximumMessageAge);
this.Description = serviceDescription;
this.Channel = new OAuthChannel(signingElement, store, tokenManager, false);
this.TokenGenerator = new StandardTokenGenerator();
this.TokenManager = tokenManager;
}
/// <summary>
/// Gets the description of this Service Provider.
/// </summary>
public ServiceProviderDescription Description { get; private set; }
/// <summary>
/// Gets or sets the channel to use for sending/receiving messages.
/// </summary>
internal OAuthChannel Channel { get; set; }
/// <summary>
/// Gets or sets the generator responsible for generating new tokens and secrets.
/// </summary>
internal ITokenGenerator TokenGenerator { get; set; }
/// <summary>
/// Gets the persistence store for tokens and secrets.
/// </summary>
internal ITokenManager TokenManager { get; private set; }
internal RequestTokenMessage ReadTokenRequest() {
return this.Channel.ReadFromRequest<RequestTokenMessage>();
}
internal RequestTokenMessage ReadTokenRequest(HttpRequest request) {
return this.ReadTokenRequest(new HttpRequestInfo(request));
}
internal RequestTokenMessage ReadTokenRequest(HttpRequestInfo request) {
return this.Channel.ReadFromRequest<RequestTokenMessage>(request);
}
internal void SendUnauthorizedTokenResponse(RequestTokenMessage request) {
string token = this.TokenGenerator.GenerateRequestToken(request.ConsumerKey);
string secret = this.TokenGenerator.GenerateSecret();
this.TokenManager.StoreNewRequestToken(request.ConsumerKey, token, secret, null/*add params*/);
UnauthorizedRequestTokenMessage response = new UnauthorizedRequestTokenMessage {
RequestToken = token,
TokenSecret = secret,
};
this.Channel.Send(response);
}
internal DirectUserToServiceProviderMessage ReadAuthorizationRequest() {
return this.Channel.ReadFromRequest<DirectUserToServiceProviderMessage>();
}
internal DirectUserToServiceProviderMessage ReadAuthorizationRequest(HttpRequest request) {
return this.ReadAuthorizationRequest(new HttpRequestInfo(request));
}
internal DirectUserToServiceProviderMessage ReadAuthorizationRequest(HttpRequestInfo request) {
return this.Channel.ReadFromRequest<DirectUserToServiceProviderMessage>(request);
}
/// <summary>
///
/// </summary>
/// <param name="request"></param>
/// <returns>The pending user agent redirect based message to be sent as an HttpResponse.</returns>
internal Response SendAuthorizationResponse(DirectUserToServiceProviderMessage request) {
var authorization = new DirectUserToConsumerMessage(request.Callback) {
RequestToken = request.RequestToken,
};
return this.Channel.Send(authorization);
}
internal RequestAccessTokenMessage ReadAccessTokenRequest() {
return this.Channel.ReadFromRequest<RequestAccessTokenMessage>();
}
internal RequestAccessTokenMessage ReadAccessTokenRequest(HttpRequest request) {
return this.ReadAccessTokenRequest(new HttpRequestInfo(request));
}
internal RequestAccessTokenMessage ReadAccessTokenRequest(HttpRequestInfo request) {
return this.Channel.ReadFromRequest<RequestAccessTokenMessage>(request);
}
internal void SendAccessToken(RequestAccessTokenMessage request) {
if (!this.TokenManager.IsRequestTokenAuthorized(request.RequestToken)) {
throw new ProtocolException(
string.Format(
CultureInfo.CurrentCulture,
Strings.AccessTokenNotAuthorized,
request.RequestToken));
}
string accessToken = this.TokenGenerator.GenerateAccessToken(request.ConsumerKey);
string tokenSecret = this.TokenGenerator.GenerateSecret();
this.TokenManager.ExpireRequestTokenAndStoreNewAccessToken(request.ConsumerKey, request.RequestToken, accessToken, tokenSecret);
var grantAccess = new GrantAccessTokenMessage {
AccessToken = accessToken,
TokenSecret = tokenSecret,
};
this.Channel.Send(grantAccess);
}
internal string GetAccessTokenInRequest() {
var accessMessage = this.Channel.ReadFromRequest<AccessProtectedResourcesMessage>();
if (this.TokenManager.GetTokenType(accessMessage.AccessToken) != TokenType.AccessToken) {
throw new ProtocolException(
string.Format(
CultureInfo.CurrentCulture,
Strings.BadAccessTokenInProtectedResourceRequest,
accessMessage.AccessToken));
}
return accessMessage.AccessToken;
}
private void TokenSignatureVerificationCallback(ITamperResistantOAuthMessage message) {
message.ConsumerSecret = this.TokenManager.GetConsumerSecret(message.ConsumerKey);
var tokenMessage = message as ITokenContainingMessage;
if (tokenMessage != null) {
message.TokenSecret = this.TokenManager.GetTokenSecret(tokenMessage.Token);
}
}
}
}
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