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//-----------------------------------------------------------------------
// <copyright file="AuthenticationOnlyCookieOAuthTokenManager.cs" company="Microsoft">
// Copyright (c) Microsoft. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
namespace DotNetOpenAuth.AspNet.Clients {
using System;
using System.Text;
using System.Web;
using System.Web.Security;
/// <summary>
/// Stores OAuth tokens in the current request's cookie
/// </summary>
public class AuthenticationOnlyCookieOAuthTokenManager : IOAuthTokenManager {
/// <summary>
/// Key used for token cookie
/// </summary>
protected const string TokenCookieKey = "OAuthTokenSecret";
/// <summary>
/// Primary request context.
/// </summary>
private readonly HttpContextBase primaryContext;
/// <summary>
/// Initializes a new instance of the <see cref="AuthenticationOnlyCookieOAuthTokenManager"/> class.
/// </summary>
public AuthenticationOnlyCookieOAuthTokenManager() {
}
/// <summary>
/// Initializes a new instance of the <see cref="AuthenticationOnlyCookieOAuthTokenManager"/> class.
/// </summary>
/// <param name="context">The current request context.</param>
public AuthenticationOnlyCookieOAuthTokenManager(HttpContextBase context) {
this.primaryContext = context;
}
/// <summary>
/// Gets the effective HttpContext object to use.
/// </summary>
protected HttpContextBase Context {
get {
return this.primaryContext ?? new HttpContextWrapper(HttpContext.Current);
}
}
/// <summary>
/// Gets the token secret from the specified token.
/// </summary>
/// <param name="token">The token.</param>
/// <returns>
/// The token's secret
/// </returns>
public virtual string GetTokenSecret(string token) {
HttpCookie cookie = this.Context.Request.Cookies[TokenCookieKey];
if (cookie == null || string.IsNullOrEmpty(cookie.Values[token])) {
return null;
}
string secret = DecodeAndUnprotectToken(token, cookie.Values[token]);
return secret;
}
/// <summary>
/// Replaces the request token with access token.
/// </summary>
/// <param name="requestToken">The request token.</param>
/// <param name="accessToken">The access token.</param>
/// <param name="accessTokenSecret">The access token secret.</param>
public virtual void ReplaceRequestTokenWithAccessToken(string requestToken, string accessToken, string accessTokenSecret) {
var cookie = new HttpCookie(TokenCookieKey) {
Value = string.Empty,
Expires = DateTime.UtcNow.AddDays(-5)
};
this.Context.Response.Cookies.Set(cookie);
}
/// <summary>
/// Stores the request token together with its secret.
/// </summary>
/// <param name="requestToken">The request token.</param>
/// <param name="requestTokenSecret">The request token secret.</param>
public virtual void StoreRequestToken(string requestToken, string requestTokenSecret) {
var cookie = new HttpCookie(TokenCookieKey) {
HttpOnly = true
};
if (FormsAuthentication.RequireSSL) {
cookie.Secure = true;
}
var encryptedToken = ProtectAndEncodeToken(requestToken, requestTokenSecret);
cookie.Values[requestToken] = encryptedToken;
this.Context.Response.Cookies.Set(cookie);
}
/// <summary>
/// Protect and url-encode the specified token secret.
/// </summary>
/// <param name="token">The token to be used as a key.</param>
/// <param name="tokenSecret">The token secret to be protected</param>
/// <returns>The encrypted and protected string.</returns>
protected static string ProtectAndEncodeToken(string token, string tokenSecret)
{
byte[] cookieBytes = Encoding.UTF8.GetBytes(tokenSecret);
var secretBytes = MachineKeyUtil.Protect(cookieBytes, TokenCookieKey, "Token:" + token);
return HttpServerUtility.UrlTokenEncode(secretBytes);
}
/// <summary>
/// Url-decode and unprotect the specified encrypted token string.
/// </summary>
/// <param name="token">The token to be used as a key.</param>
/// <param name="encryptedToken">The encrypted token to be decrypted</param>
/// <returns>The original token secret</returns>
protected static string DecodeAndUnprotectToken(string token, string encryptedToken)
{
byte[] cookieBytes = HttpServerUtility.UrlTokenDecode(encryptedToken);
byte[] clearBytes = MachineKeyUtil.Unprotect(cookieBytes, TokenCookieKey, "Token:" + token);
return Encoding.UTF8.GetString(clearBytes);
}
}
}
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