Nemiro.OAuth is a class library for authorization via OAuth protocol in .NET Framework.

The library provides mechanisms for implementing OAuth clients, and also contains a ready-to-use clients for popular websites.

Nemiro.OAuth is licensed under the Apache License Version 2.0.

To install Nemiro.OAuth, run the following command in the Package Manager Console:

PM> Install-Package Nemiro.OAuth

http://demo-oauth.nemiro.net/

• Support OAuth 1.0 and 2.0;
• Obtaining basic information about users: ID, name, sex, date of birth, email address and telephone number;
• Ready-to-Use OAuth clients for: Amazon, Assembla, CodeProject, Dropbox, Facebook, Foursquare, GitHub, Google, Instagram, LinkedIn, Microsoft Live, Mail.Ru, Odnoklassniki (odnoklassniki.ru), SoundCloud, SourceForge, Tumblr, Twitter, VK (vkontakte, vk.com), Yahoo!, Yandex (yandex.ru);
• Base classes to create additional clients;
• Basic principles of operation with API of different providers;
• Unified mechanisms to facilitate integration with a variety of API.

Less code, more functionality!

• Microsoft Windows XP, 7 or later with .NET Framework 3.5, 4.0 or 4.5
• Microsoft Visual Studio 2010 (recommended Professional Edition with Service Pack 1) or later.

1. Create an application at the OAuth provider site.

2. Use these credentials for registration of an OAuth client in your project.

For example, Facebook:

C#

OAuthManager.RegisterClient
(
	"facebook", 
	"1435890426686808", 
	"c6057dfae399beee9e8dc46a4182e8fd"
);

Visual Basic .NET

OAuthManager.RegisterClient _
(
	"facebook", 
	"1435890426686808", 
	"c6057dfae399beee9e8dc46a4182e8fd"
)

3. Create a page to handle the callback. And add code to obtain user data with external server.

For example:

C#

public partial class ExternalLoginResult : System.Web.UI.Page
{
	protected void Page_Load(object sender, EventArgs e)
	{
		var result = OAuthWeb.VerifyAuthorization();
		Response.Write(String.Format("Provider: {0}<br />", result.ProviderName));
		if (result.IsSuccessfully)
		{
			var user = result.UserInfo;
			Response.Write(String.Format("User ID:  {0}<br />", user.UserId));
			Response.Write(String.Format("Name:     {0}<br />", user.DisplayName));
			Response.Write(String.Format("Email:    {0}", user.Email));
		}
		else
		{
			Response.Write(result.ErrorInfo.Message);
		}
	}
}

Visual Basic .NET

Public Class ExternalLoginResult
  Inherits System.Web.UI.Page

  Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    Dim result As AuthorizationResult = OAuthWeb.VerifyAuthorization()
    Response.Write(String.Format("Provider: {0}<br />", result.ProviderName))
    If result.IsSuccessfully Then
      Dim user As UserInfo = result.UserInfo
      Response.Write(String.Format("User ID:  {0}<br />", user.UserId))
      Response.Write(String.Format("Name:     {0}<br />", user.DisplayName))
      Response.Write(String.Format("Email:    {0}", user.Email))
    Else
      Response.Write(result.ErrorInfo.ToString())
    End If
  End Sub

End Class

4. Get the address for authentication and redirect the user to it.

C#

string returnUrl =  new Uri(Request.Url, "ExternalLoginResult.aspx").AbsoluteUri;
OAuthWeb.RedirectToAuthorization("facebook", returnUrl);

Visual Basic .NET

Dim returnUrl As String = New Uri(Request.Url, "ExternalLoginResult.aspx").AbsoluteUri
OAuthWeb.RedirectToAuthorization("facebook", returnUrl)

5. Enjoy!

• Guide Nemiro.OAuth
• Web Demo
• Nemiro.OAuth.LoginForms
• Other projects