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Add Buffer provider

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This commit is contained in:
Jerrie Pelser
2014-08-21 08:31:01 +07:00
parent fbe5f15148
commit e8a6aab0fa
14 changed files with 636 additions and 0 deletions
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29
Owin.Security.Providers/Buffer/BufferAuthenticationExtensions.cs Normal file
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using System;
namespace Owin.Security.Providers.Buffer
{
public static class BufferAuthenticationExtensions
{
public static IAppBuilder UseBufferAuthentication(this IAppBuilder app,
BufferAuthenticationOptions options)
{
if (app == null)
throw new ArgumentNullException("app");
if (options == null)
throw new ArgumentNullException("options");
app.Use(typeof(BufferAuthenticationMiddleware), app, options);
return app;
}
public static IAppBuilder UseBufferAuthentication(this IAppBuilder app, string clientId, string clientSecret)
{
return app.UseBufferAuthentication(new BufferAuthenticationOptions
{
ClientId = clientId,
ClientSecret = clientSecret
});
}
}
}

222
Owin.Security.Providers/Buffer/BufferAuthenticationHandler.cs Normal file
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using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Security.Claims;
using System.Threading.Tasks;
using Microsoft.Owin;
using Microsoft.Owin.Infrastructure;
using Microsoft.Owin.Logging;
using Microsoft.Owin.Security;
using Microsoft.Owin.Security.Infrastructure;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
namespace Owin.Security.Providers.Buffer
{
public class BufferAuthenticationHandler : AuthenticationHandler<BufferAuthenticationOptions>
{
private const string XmlSchemaString = "http://www.w3.org/2001/XMLSchema#string";
private const string TokenEndpoint = "https://api.bufferapp.com/1/oauth2/token.json";
private const string UserInfoEndpoint = "https://api.bufferapp.com/1/user.json";
private readonly ILogger logger;
private readonly HttpClient httpClient;
public BufferAuthenticationHandler(HttpClient httpClient, ILogger logger)
{
this.httpClient = httpClient;
this.logger = logger;
}
protected override async Task<AuthenticationTicket> AuthenticateCoreAsync()
{
AuthenticationProperties properties = null;
try
{
string code = null;
string state = null;
IReadableStringCollection query = Request.Query;
IList<string> values = query.GetValues("code");
if (values != null && values.Count == 1)
{
code = values[0];
}
values = query.GetValues("state");
if (values != null && values.Count == 1)
{
state = values[0];
}
properties = Options.StateDataFormat.Unprotect(state);
if (properties == null)
{
return null;
}
// OAuth2 10.12 CSRF
if (!ValidateCorrelationId(properties, logger))
{
return new AuthenticationTicket(null, properties);
}
string requestPrefix = Request.Scheme + "://" + Request.Host;
string redirectUri = requestPrefix + Request.PathBase + Options.CallbackPath;
// Build up the body for the token request
var body = new List<KeyValuePair<string, string>>();
body.Add(new KeyValuePair<string, string>("grant_type", "authorization_code"));
body.Add(new KeyValuePair<string, string>("code", code));
body.Add(new KeyValuePair<string, string>("redirect_uri", redirectUri));
body.Add(new KeyValuePair<string, string>("client_id", Options.ClientId));
body.Add(new KeyValuePair<string, string>("client_secret", Options.ClientSecret));
// Request the token
HttpResponseMessage tokenResponse =
await httpClient.PostAsync(TokenEndpoint, new FormUrlEncodedContent(body));
tokenResponse.EnsureSuccessStatusCode();
string text = await tokenResponse.Content.ReadAsStringAsync();
// Deserializes the token response
dynamic response = JsonConvert.DeserializeObject<dynamic>(text);
string accessToken = (string)response.access_token;
string expires = (string) response.expires_in;
// Get the Buffer user
HttpResponseMessage graphResponse = await httpClient.GetAsync(
UserInfoEndpoint + "?access_token=" + Uri.EscapeDataString(accessToken), Request.CallCancelled);
graphResponse.EnsureSuccessStatusCode();
text = await graphResponse.Content.ReadAsStringAsync();
JObject user = JObject.Parse(text);
var context = new BufferAuthenticatedContext(Context, user, accessToken, expires);
context.Identity = new ClaimsIdentity(
Options.AuthenticationType,
ClaimsIdentity.DefaultNameClaimType,
ClaimsIdentity.DefaultRoleClaimType);
if (!string.IsNullOrEmpty(context.Id))
{
context.Identity.AddClaim(new Claim(ClaimTypes.NameIdentifier, context.Id, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.Name))
{
context.Identity.AddClaim(new Claim(ClaimsIdentity.DefaultNameClaimType, context.Name, XmlSchemaString, Options.AuthenticationType));
}
context.Properties = properties;
await Options.Provider.Authenticated(context);
return new AuthenticationTicket(context.Identity, context.Properties);
}
catch (Exception ex)
{
logger.WriteError(ex.Message);
}
return new AuthenticationTicket(null, properties);
}
protected override Task ApplyResponseChallengeAsync()
{
if (Response.StatusCode != 401)
{
return Task.FromResult<object>(null);
}
AuthenticationResponseChallenge challenge = Helper.LookupChallenge(Options.AuthenticationType, Options.AuthenticationMode);
if (challenge != null)
{
string baseUri =
Request.Scheme +
Uri.SchemeDelimiter +
Request.Host +
Request.PathBase;
string currentUri =
baseUri +
Request.Path +
Request.QueryString;
string redirectUri =
baseUri +
Options.CallbackPath;
AuthenticationProperties properties = challenge.Properties;
if (string.IsNullOrEmpty(properties.RedirectUri))
{
properties.RedirectUri = currentUri;
}
// OAuth2 10.12 CSRF
GenerateCorrelationId(properties);
string state = Options.StateDataFormat.Protect(properties);
string authorizationEndpoint =
"https://bufferapp.com/oauth2/authorize" +
"?response_type=code" +
"&client_id=" + Uri.EscapeDataString(Options.ClientId) +
"&redirect_uri=" + Uri.EscapeDataString(redirectUri) +
"&state=" + Uri.EscapeDataString(state);
Response.Redirect(authorizationEndpoint);
}
return Task.FromResult<object>(null);
}
public override async Task<bool> InvokeAsync()
{
return await InvokeReplyPathAsync();
}
private async Task<bool> InvokeReplyPathAsync()
{
if (Options.CallbackPath.HasValue && Options.CallbackPath == Request.Path)
{
// TODO: error responses
AuthenticationTicket ticket = await AuthenticateAsync();
if (ticket == null)
{
logger.WriteWarning("Invalid return state, unable to redirect.");
Response.StatusCode = 500;
return true;
}
var context = new BufferReturnEndpointContext(Context, ticket);
context.SignInAsAuthenticationType = Options.SignInAsAuthenticationType;
context.RedirectUri = ticket.Properties.RedirectUri;
await Options.Provider.ReturnEndpoint(context);
if (context.SignInAsAuthenticationType != null &&
context.Identity != null)
{
ClaimsIdentity grantIdentity = context.Identity;
if (!string.Equals(grantIdentity.AuthenticationType, context.SignInAsAuthenticationType, StringComparison.Ordinal))
{
grantIdentity = new ClaimsIdentity(grantIdentity.Claims, context.SignInAsAuthenticationType, grantIdentity.NameClaimType, grantIdentity.RoleClaimType);
}
Context.Authentication.SignIn(context.Properties, grantIdentity);
}
if (!context.IsRequestCompleted && context.RedirectUri != null)
{
string redirectUri = context.RedirectUri;
if (context.Identity == null)
{
// add a redirect hint that sign-in failed in some way
redirectUri = WebUtilities.AddQueryString(redirectUri, "error", "access_denied");
}
Response.Redirect(redirectUri);
context.RequestCompleted();
}
return context.IsRequestCompleted;
}
return false;
}
}
}

85
Owin.Security.Providers/Buffer/BufferAuthenticationMiddleware.cs Normal file
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using System;
using System.Globalization;
using System.Net.Http;
using Microsoft.Owin;
using Microsoft.Owin.Logging;
using Microsoft.Owin.Security;
using Microsoft.Owin.Security.DataHandler;
using Microsoft.Owin.Security.DataProtection;
using Microsoft.Owin.Security.Infrastructure;
using Owin.Security.Providers.Properties;
namespace Owin.Security.Providers.Buffer
{
public class BufferAuthenticationMiddleware : AuthenticationMiddleware<BufferAuthenticationOptions>
{
private readonly HttpClient httpClient;
private readonly ILogger logger;
public BufferAuthenticationMiddleware(OwinMiddleware next, IAppBuilder app,
BufferAuthenticationOptions options)
: base(next, options)
{
if (String.IsNullOrWhiteSpace(Options.ClientId))
throw new ArgumentException(String.Format(CultureInfo.CurrentCulture,
Resources.Exception_OptionMustBeProvided, "ClientId"));
if (String.IsNullOrWhiteSpace(Options.ClientSecret))
throw new ArgumentException(String.Format(CultureInfo.CurrentCulture,
Resources.Exception_OptionMustBeProvided, "ClientSecret"));
logger = app.CreateLogger<BufferAuthenticationMiddleware>();
if (Options.Provider == null)
Options.Provider = new BufferAuthenticationProvider();
if (Options.StateDataFormat == null)
{
IDataProtector dataProtector = app.CreateDataProtector(
typeof (BufferAuthenticationMiddleware).FullName,
Options.AuthenticationType, "v1");
Options.StateDataFormat = new PropertiesDataFormat(dataProtector);
}
if (String.IsNullOrEmpty(Options.SignInAsAuthenticationType))
Options.SignInAsAuthenticationType = app.GetDefaultSignInAsAuthenticationType();
httpClient = new HttpClient(ResolveHttpMessageHandler(Options))
{
Timeout = Options.BackchannelTimeout,
MaxResponseContentBufferSize = 1024*1024*10
};
}
/// <summary>
/// Provides the <see cref="T:Microsoft.Owin.Security.Infrastructure.AuthenticationHandler" /> object for processing
/// authentication-related requests.
/// </summary>
/// <returns>
/// An <see cref="T:Microsoft.Owin.Security.Infrastructure.AuthenticationHandler" /> configured with the
/// <see cref="T:Owin.Security.Providers.Buffer.BufferAuthenticationOptions" /> supplied to the constructor.
/// </returns>
protected override AuthenticationHandler<BufferAuthenticationOptions> CreateHandler()
{
return new BufferAuthenticationHandler(httpClient, logger);
}
private HttpMessageHandler ResolveHttpMessageHandler(BufferAuthenticationOptions options)
{
HttpMessageHandler handler = options.BackchannelHttpHandler ?? new WebRequestHandler();
// If they provided a validator, apply it or fail.
if (options.BackchannelCertificateValidator != null)
{
// Set the cert validate callback
var webRequestHandler = handler as WebRequestHandler;
if (webRequestHandler == null)
{
throw new InvalidOperationException(Resources.Exception_ValidatorHandlerMismatch);
}
webRequestHandler.ServerCertificateValidationCallback = options.BackchannelCertificateValidator.Validate;
}
return handler;
}
}
}

92
Owin.Security.Providers/Buffer/BufferAuthenticationOptions.cs Normal file
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using System;
using System.Net.Http;
using Microsoft.Owin;
using Microsoft.Owin.Security;
namespace Owin.Security.Providers.Buffer
{
public class BufferAuthenticationOptions : AuthenticationOptions
{
/// <summary>
/// Gets or sets the a pinned certificate validator to use to validate the endpoints used
/// in back channel communications belong to Buffer
/// </summary>
/// <value>
/// The pinned certificate validator.
/// </value>
/// <remarks>
/// If this property is null then the default certificate checks are performed,
/// validating the subject name and if the signing chain is a trusted party.
/// </remarks>
public ICertificateValidator BackchannelCertificateValidator { get; set; }
/// <summary>
/// The HttpMessageHandler used to communicate with Buffer.
/// This cannot be set at the same time as BackchannelCertificateValidator unless the value
/// can be downcast to a WebRequestHandler.
/// </summary>
public HttpMessageHandler BackchannelHttpHandler { get; set; }
/// <summary>
/// Gets or sets timeout value in milliseconds for back channel communications with Buffer.
/// </summary>
/// <value>
/// The back channel timeout in milliseconds.
/// </value>
public TimeSpan BackchannelTimeout { get; set; }
/// <summary>
/// The request path within the application's base path where the user-agent will be returned.
/// The middleware will process this request when it arrives.
/// Default value is "/signin-buffer".
/// </summary>
public PathString CallbackPath { get; set; }
/// <summary>
/// Get or sets the text that the user can display on a sign in user interface.
/// </summary>
public string Caption
{
get { return Description.Caption; }
set { Description.Caption = value; }
}
/// <summary>
/// Gets or sets the Buffer supplied Client ID
/// </summary>
public string ClientId { get; set; }
/// <summary>
/// Gets or sets the Buffer supplied Client Secret
/// </summary>
public string ClientSecret { get; set; }
/// <summary>
/// Gets or sets the <see cref="IBufferAuthenticationProvider" /> used in the authentication events
/// </summary>
public IBufferAuthenticationProvider Provider { get; set; }
/// <summary>
/// Gets or sets the name of another authentication middleware which will be responsible for actually issuing a user
/// <see cref="System.Security.Claims.ClaimsIdentity" />.
/// </summary>
public string SignInAsAuthenticationType { get; set; }
/// <summary>
/// Gets or sets the type used to secure data handled by the middleware.
/// </summary>
public ISecureDataFormat<AuthenticationProperties> StateDataFormat { get; set; }
/// <summary>
/// Initializes a new <see cref="BufferAuthenticationOptions" />
/// </summary>
public BufferAuthenticationOptions()
: base("Buffer")
{
Caption = Constants.DefaultAuthenticationType;
CallbackPath = new PathString("/signin-buffer");
AuthenticationMode = AuthenticationMode.Passive;
BackchannelTimeout = TimeSpan.FromSeconds(60);
}
}
}

7
Owin.Security.Providers/Buffer/Constants.cs Normal file
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namespace Owin.Security.Providers.Buffer
{
internal static class Constants
{
public const string DefaultAuthenticationType = "Buffer";
}
}

86
Owin.Security.Providers/Buffer/Provider/BufferAuthenticatedContext.cs Normal file
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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
using System;
using System.Globalization;
using System.Security.Claims;
using Microsoft.Owin;
using Microsoft.Owin.Security;
using Microsoft.Owin.Security.Provider;
using Newtonsoft.Json.Linq;
namespace Owin.Security.Providers.Buffer
{
/// <summary>
/// Contains information about the login session as well as the user <see cref="System.Security.Claims.ClaimsIdentity"/>.
/// </summary>
public class BufferAuthenticatedContext : BaseContext
{
/// <summary>
/// Initializes a <see cref="BufferAuthenticatedContext"/>
/// </summary>
/// <param name="context">The OWIN environment</param>
/// <param name="user">The JSON-serialized user</param>
/// <param name="accessToken">Buffer Access token</param>
/// <param name="expires">Seconds until expiration</param>
public BufferAuthenticatedContext(IOwinContext context, JObject user, string accessToken, string expires)
: base(context)
{
User = user;
Id = TryGetValue(user, "id");
Name = TryGetValue(user, "name");
AccessToken = accessToken;
int expiresValue;
if (Int32.TryParse(expires, NumberStyles.Integer, CultureInfo.InvariantCulture, out expiresValue))
{
ExpiresIn = TimeSpan.FromSeconds(expiresValue);
}
Id = TryGetValue(user, "id");
}
/// <summary>
/// Gets the JSON-serialized user
/// </summary>
/// <remarks>
/// Contains the Buffer user obtained from the endpoint https://api.bufferapp.com/1/user.json
/// </remarks>
public JObject User { get; private set; }
/// <summary>
/// Gets the Buffer OAuth access token
/// </summary>
public string AccessToken { get; private set; }
/// <summary>
/// Gets the Buffer access token expiration time
/// </summary>
public TimeSpan? ExpiresIn { get; set; }
/// <summary>
/// Gets the Buffer user ID
/// </summary>
public string Id { get; private set; }
/// <summary>
/// The name of the user
/// </summary>
public string Name { get; private set; }
/// <summary>
/// Gets the <see cref="ClaimsIdentity"/> representing the user
/// </summary>
public ClaimsIdentity Identity { get; set; }
/// <summary>
/// Gets or sets a property bag for common authentication properties
/// </summary>
public AuthenticationProperties Properties { get; set; }
private static string TryGetValue(JObject user, string propertyName)
{
JToken value;
return user.TryGetValue(propertyName, out value) ? value.ToString() : null;
}
}
}

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Owin.Security.Providers/Buffer/Provider/BufferAuthenticationProvider.cs Normal file
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using System;
using System.Threading.Tasks;
namespace Owin.Security.Providers.Buffer
{
/// <summary>
/// Default <see cref="IBufferAuthenticationProvider"/> implementation.
/// </summary>
public class BufferAuthenticationProvider : IBufferAuthenticationProvider
{
/// <summary>
/// Initializes a <see cref="BufferAuthenticationProvider"/>
/// </summary>
public BufferAuthenticationProvider()
{
OnAuthenticated = context => Task.FromResult<object>(null);
OnReturnEndpoint = context => Task.FromResult<object>(null);
}
/// <summary>
/// Gets or sets the function that is invoked when the Authenticated method is invoked.
/// </summary>
public Func<BufferAuthenticatedContext, Task> OnAuthenticated { get; set; }
/// <summary>
/// Gets or sets the function that is invoked when the ReturnEndpoint method is invoked.
/// </summary>
public Func<BufferReturnEndpointContext, Task> OnReturnEndpoint { get; set; }
/// <summary>
/// Invoked whenever Buffer succesfully authenticates a user
/// </summary>
/// <param name="context">Contains information about the login session as well as the user <see cref="System.Security.Claims.ClaimsIdentity"/>.</param>
/// <returns>A <see cref="Task"/> representing the completed operation.</returns>
public virtual Task Authenticated(BufferAuthenticatedContext context)
{
return OnAuthenticated(context);
}
/// <summary>
/// Invoked prior to the <see cref="System.Security.Claims.ClaimsIdentity"/> being saved in a local cookie and the browser being redirected to the originally requested URL.
/// </summary>
/// <param name="context"></param>
/// <returns>A <see cref="Task"/> representing the completed operation.</returns>
public virtual Task ReturnEndpoint(BufferReturnEndpointContext context)
{
return OnReturnEndpoint(context);
}
}
}

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Owin.Security.Providers/Buffer/Provider/BufferReturnEndpointContext.cs Normal file
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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
using Microsoft.Owin;
using Microsoft.Owin.Security;
using Microsoft.Owin.Security.Provider;
namespace Owin.Security.Providers.Buffer
{
/// <summary>
/// Provides context information to middleware providers.
/// </summary>
public class BufferReturnEndpointContext : ReturnEndpointContext
{
/// <summary>
///
/// </summary>
/// <param name="context">OWIN environment</param>
/// <param name="ticket">The authentication ticket</param>
public BufferReturnEndpointContext(
IOwinContext context,
AuthenticationTicket ticket)
: base(context, ticket)
{
}
}
}

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Owin.Security.Providers/Buffer/Provider/IBufferAuthenticationProvider.cs Normal file
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using System.Threading.Tasks;
namespace Owin.Security.Providers.Buffer
{
/// <summary>
/// Specifies callback methods which the <see cref="BufferAuthenticationMiddleware"></see> invokes to enable developer control over the authentication process. />
/// </summary>
public interface IBufferAuthenticationProvider
{
/// <summary>
/// Invoked whenever Buffer succesfully authenticates a user
/// </summary>
/// <param name="context">Contains information about the login session as well as the user <see cref="System.Security.Claims.ClaimsIdentity"/>.</param>
/// <returns>A <see cref="Task"/> representing the completed operation.</returns>
Task Authenticated(BufferAuthenticatedContext context);
/// <summary>
/// Invoked prior to the <see cref="System.Security.Claims.ClaimsIdentity"/> being saved in a local cookie and the browser being redirected to the originally requested URL.
/// </summary>
/// <param name="context"></param>
/// <returns>A <see cref="Task"/> representing the completed operation.</returns>
Task ReturnEndpoint(BufferReturnEndpointContext context);
}
}

9
Owin.Security.Providers/Owin.Security.Providers.csproj
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@@ -57,6 +57,15 @@
<Reference Include="System.Xml" />
</ItemGroup>
<ItemGroup>
<Compile Include="Buffer\BufferAuthenticationExtensions.cs" />
<Compile Include="Buffer\BufferAuthenticationHandler.cs" />
<Compile Include="Buffer\BufferAuthenticationMiddleware.cs" />
<Compile Include="Buffer\BufferAuthenticationOptions.cs" />
<Compile Include="Buffer\Constants.cs" />
<Compile Include="Buffer\Provider\BufferAuthenticatedContext.cs" />
<Compile Include="Buffer\Provider\BufferAuthenticationProvider.cs" />
<Compile Include="Buffer\Provider\BufferReturnEndpointContext.cs" />
<Compile Include="Buffer\Provider\IBufferAuthenticationProvider.cs" />
<Compile Include="GitHub\Constants.cs" />
<Compile Include="GitHub\GitHubAuthenticationExtensions.cs" />
<Compile Include="GitHub\GitHubAuthenticationHandler.cs" />

3
Owin.Security.Providers/Owin.Security.Providers.csproj.DotSettings Normal file
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<wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=Buffer_005CProvider/@EntryIndexedValue">True</s:Boolean>
<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=GitHub_005CProvider/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>

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3
OwinOAuthProvidersDemo/App_Start/Startup.Auth.cs
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@@ -3,6 +3,7 @@ using Microsoft.AspNet.Identity;
using Microsoft.Owin;
using Microsoft.Owin.Security.Cookies;
using Owin;
using Owin.Security.Providers.Buffer;
using Owin.Security.Providers.GitHub;
using Owin.Security.Providers.GooglePlus;
using Owin.Security.Providers.GooglePlus.Provider;
@@ -54,6 +55,8 @@ namespace OwinOAuthProvidersDemo
//app.UseGitHubAuthentication("", "");
//app.UseBufferAuthentication("", "");
//app.UseStackExchangeAuthentication(
// clientId: "",
// clientSecret: "",