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    <p>I was also interested in custom authentication in a REST HTTP WCF service and finally got it to work.</p> <p>That being said my code will give you a way to get it working, but I recommend reading this guide which explains everything in more depth: <a href="http://wcfsecurityguide.codeplex.com/" rel="noreferrer">http://wcfsecurityguide.codeplex.com/</a></p> <p>First, change the <code>system.web</code> portion of your Web.Config to look like this:</p> <pre><code>&lt;system.web&gt; &lt;compilation debug="true" targetFramework="4.0" /&gt; &lt;httpRuntime maxRequestLength="10485760" /&gt; &lt;authentication mode="None"&gt;&lt;/authentication&gt; &lt;httpModules&gt; &lt;add name="BasicAuthenticationModule" type="YourNamespace.UserNameAuthenticator" /&gt; &lt;/httpModules&gt; &lt;/system.web&gt; </code></pre> <p>Then add another file to your project: UserNameAuthenticator.cs</p> <pre><code>using System; using System.Collections.Generic; using System.Text; using System.Web; using System.Web.Security; using System.Security.Principal; using System.ServiceModel.Activation; namespace YourNamespace { public class UserNameAuthenticator : IHttpModule { public void Dispose() { } public void Init(HttpApplication application) { application.AuthenticateRequest += new EventHandler(this.OnAuthenticateRequest); application.AuthorizeRequest += new EventHandler(this.OnAuthorizationRequest); application.EndRequest += new EventHandler(this.OnEndRequest); } public bool CustomAuth(string username, string password) { //TODO: Implement your custom auth logic here return true; } public string[] GetCustomRoles(string username) { return new string[] { "read", "write" }; } public void OnAuthorizationRequest(object source, EventArgs eventArgs) { HttpApplication app = (HttpApplication)source; //If you want to handle authorization differently from authentication } public void OnAuthenticateRequest(object source, EventArgs eventArgs) { HttpApplication app = (HttpApplication)source; //the Authorization header is checked if present string authHeader = app.Request.Headers["Authorization"]; if (!string.IsNullOrEmpty(authHeader)) { string authStr = app.Request.Headers["Authorization"]; if (authStr == null || authStr.Length == 0) { // No credentials; anonymous request return; } authStr = authStr.Trim(); if (authStr.IndexOf("Basic", 0) != 0) { //header not correct we do not authenticate return; } authStr = authStr.Trim(); string encodedCredentials = authStr.Substring(6); byte[] decodedBytes = Convert.FromBase64String(encodedCredentials); string s = new ASCIIEncoding().GetString(decodedBytes); string[] userPass = s.Split(new char[] { ':' }); string username = userPass[0]; string password = userPass[1]; //the user is validated against the SqlMemberShipProvider //If it is validated then the roles are retrieved from the //role provider and a generic principal is created //the generic principal is assigned to the user context // of the application if (CustomAuth(username, password)) { string[] roles = GetCustomRoles(username); app.Context.User = new GenericPrincipal(new GenericIdentity(username, "Membership Provider"), roles); } else { DenyAccess(app); return; } } else { //the authorization header is not present //the status of response is set to 401 and it ended //the end request will check if it is 401 and add //the authentication header so the client knows //it needs to send credentials to authenticate app.Response.StatusCode = 401; app.Response.End(); } } public void OnEndRequest(object source, EventArgs eventArgs) { if (HttpContext.Current.Response.StatusCode == 401) { //if the status is 401 the WWW-Authenticated is added to //the response so client knows it needs to send credentials HttpContext context = HttpContext.Current; context.Response.StatusCode = 401; context.Response.AddHeader("WWW-Authenticate", "Basic Realm"); } } private void DenyAccess(HttpApplication app) { app.Response.StatusCode = 401; app.Response.StatusDescription = "Access Denied"; // error not authenticated app.Response.Write("401 Access Denied"); app.CompleteRequest(); } } // End Class } //End Namespace </code></pre>
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    1. POAdding basic HTTP auth to a WCF REST service
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    1. USBrian R. Bondy
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    1. COI have followed the steps as you suggested, but the module never gets called. I tried adding Basic Auth on IIS but still, the module does not get called. Am I missing something?
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    2. COI'm not sure why as it worked for me but perhaps related to this: http://stackoverflow.com/questions/355261/whats-the-difference-between-system-web-and-system-webserver (I was testing via VS debugging auto hosted web server)
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    3. COI had to add the module manually to IIS 7.5.
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