C# Web Service Ignore Certificate Error
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C# Httpwebrequest Ignore Certificate Errors
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C# Web Service Certificate Authentication
other. Join them; it only takes a minute: Sign up C# Ignore certificate errors? up vote 82 down vote favorite 29 I am getting the following error during a web service request to a remote web service: Could not c# ignore ssl certificate errors establish trust relationship for the SSL/TLS secure channel. ---> System.Security.Authentication.AuthenticationException: The remote certificate is invalid according to the validation procedure. Is there anyway to ignore this error, and continue? It seems the remote certificate is not signed. The site I connect to is www.czebox.cz - so feel free to visit the site, and notice even browsers through security exceptions. c# .net ssl share|improve this question edited Apr 11 at 18:37 Peter Lillevold 26k570113 asked Apr 20 '10 c# httpclient ignore ssl certificate errors at 12:42 JL. 23.5k88246391 add a comment| 6 Answers 6 active oldest votes up vote 179 down vote accepted Add a certificate validation handler. Returning true will allow ignoring the validation error: ServicePointManager .ServerCertificateValidationCallback += (sender, cert, chain, sslPolicyErrors) => true; share|improve this answer answered Apr 20 '10 at 12:48 Peter Lillevold 26k570113 5 This is even more useful than it may at first appear. I ran into the OP's problem while using Managed Exchanged Web Services (EWS). I thought that I could not use this answer since I didn't have access to the low-level SOAP calls that were being made by that managed library. But when I took another look at it, I realized ServicePointManager stands on its own. So,I added the above callback before initializing the ExchangeService and it worked like a charm. –Mark Meuer Apr 19 '12 at 21:50 1 This works perfectly for me... But have no idea why... –Pogrindis Jul 10 '15 at 11:27 @Pogrindis - what kind of problem/scenario did you have? –Peter Lillevold Jul 14 '15 at 22:36 1 a big thank you this solves the problem temporarily. Add this code in Startup.cs in Web Api –Sivalingaamorthy Aug 17 at 9:44 1 If I could double up-vote I would, VERY handy! Thanks! –Henners Aug 23 at 11:09 | show 5 more comments up vote 20 down vote Th
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Servicepointmanager.servercertificatevalidationcallback Example
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C# Servicepointmanager
Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How to ignore the http://stackoverflow.com/questions/2675133/c-sharp-ignore-certificate-errors certificate check when ssl up vote 60 down vote favorite 13 I am trying find a way to ignore the certificate check when request a Https resource, so far, I found some helpful article in internet. But i still have some problem. Please review my code . I just don't understand what does the code ServicePointManager.ServerCertificateValidationCallback mean. When will this delegate method be called? And http://stackoverflow.com/questions/12506575/how-to-ignore-the-certificate-check-when-ssl one more question, in which place should i write this code? Before ServicePointManager.ServerCertificateValidationCallback execute or before Stream stream = request.GetRequestStream()? Please help me, thanks. public HttpWebRequest GetRequest() { CookieContainer cookieContainer = new CookieContainer(); // Create a request to the server HttpWebRequest request = (HttpWebRequest)WebRequest.Create(_remoteUrl); #region Set request parameters request.Method = _context.Request.HttpMethod; request.UserAgent = _context.Request.UserAgent; request.KeepAlive = true; request.CookieContainer = cookieContainer; request.PreAuthenticate = true; request.AllowAutoRedirect = false; #endregion // For POST, write the post data extracted from the incoming request if (request.Method == "POST") { Stream clientStream = _context.Request.InputStream; request.ContentType = _context.Request.ContentType; request.ContentLength = clientStream.Length; ServicePointManager.ServerCertificateValidationCallback = delegate( Object obj, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) { return (true); }; Stream stream = request.GetRequestStream(); .... } .... return request; } } c# ssl httpwebrequest certificate share|improve this question edited Dec 29 '14 at 16:53 B. Clay Shannon 45357195403 asked Sep 20 '12 at 5:33 Joe.wang 3,444849106 Possible duplicate of C# Ignore certificate errors? –Matyas Feb 26 at 9:20 add a comment| 8 Answers 8 active oldest votes up vote 35 down vote accepted Since there is only one global ServicePointManager, setting ServicePointManager.ServerCertificateValidationCallback will yield the result that all subsequent requests will i
try to make a WebRequest to a server over https, you might run into the following exception. HttpWebRequest webRequest = http://dejanstojanovic.net/aspnet/2014/september/bypass-ssl-certificate-validation/ (HttpWebRequest)WebRequest.Create("https://someurl.com/service/"); HttpWebResponse response = (HttpWebResponse)webRequest.GetResponse(); "The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel." inner Exception.Message is: "The remote certificate is invalid according http://weblogs.asp.net/smehaffie/calling-web-services-that-use-self-signed-certificates to the validation procedure." This exception is caused by invalid or expired SSL certificate. As soon as SSL certificate is expired, server will start to use self-signed certificate which fails certificate error validation. Even if you try to access the URL to which you are trying to create a request in a browser you will get the following screen How ever you can resolve this issue by declaring custom validation method. ServicePointManager.ServerCertificateValidationCallback = delegate { return true; }; In this example, validation method is overridden by custom method which always returns c# web service true value. So before making a request, declare this callback method ServicePointManager.ServerCertificateValidationCallback = delegate { return true; }; HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create("https://someurl.com/service/"); HttpWebResponse response = (HttpWebResponse)webRequest.GetResponse(); This way, validation will always pass as your custom method always returns true value. References http://msdn.microsoft.com/en-us/library/system.net.servicepointmanager.servercertificatevalidationcallback.aspx Share Disclaimer Purpose of the code contained in snippets or available for download in this article is solely for learning and demo purposes. Author will not be held responsible for any failure or damages caused due to any other usage. Latest articles MSMQ recovery with .NET Serialize DataTable to JSON with just few lines of code Copy text value to clipboard using jQuery Simplified FileAttributes usage with extension methods Resize image on the client side with JQuery Archive 1March 2016 1February 2016 2January 2016 3November 2015 3October 2015 4September 2015 1August 2015 2July 2015 3June 2015 2May 2015 5April 2015 7March 2015 5February 2015 7January 2015 6December 2014 3November 2014 5October 2014 10September 2014 4August 2014 1July 2014 7June 2014 3May 2014 3April 2014 3March 2014 Tags C#104 ASP.NET53 HTTPS1 Certificate1 from a client application you get the following error: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. This make sense since if you access the site directly in your browser you get an invalid certificate message. When you look at the details of the error it states that the certificate cannot be verified up to a trusted certification authority. This is not a big issue when using the browser since you can accept the certificate, and even add install the certificate so you don’t get the error on subsequent calls to the web services. There are 2 ways you can fix this issue. 1) You can install the certificate on all desktops/servers the client application is running on. For a desktop application used by tons of people this is really not a good solution, and even for web application this still could become a maintenance/support nightmare. 2) The other way is to add some code to your project that allows your application to ignore the certificate error. Below are the instructions on how to do this in VS 2003 and VS2005/2008. VS2003 1) Create a class files that contains the following code (I recommend calling the file Certificates.cs). 1using System.Net; 2using System.Security.Cryptography.X509Certificates; 3 4///