Asp Net Web Service Ignore Certificate Error
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C# Httpclient Ignore Ssl Certificate Errors
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Servicepointmanager.servercertificatevalidationcallback Example
a minute: Sign up Bypass invalid SSL certificate errors when calling web services in .Net up vote 69 down vote favorite 24 We are setting up a new SharePoint for which we don't have a valid SSL certificate yet. I
The Remote Certificate Is Invalid According To The Validation Procedure. Httpwebrequest
would like to call the Lists web service on it to retrieve some meta data about the setup. However, when I try to do this, I get the exception: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. The nested exception contains the error message: The remote certificate is invalid according to the validation procedure. This is correct since we are using a temporary certificate. My question is: how can I tell the .Net web ssl certificate response obtained from the server was not valid. cannot process the request. service client (SoapHttpClientProtocol) to ignore these errors? .net web-services sharepoint share|improve this question asked Sep 20 '08 at 20:07 jan.vdbergh 1,28821424 add a comment| 8 Answers 8 active oldest votes up vote 15 down vote accepted The approach I used when faced with this problem was to add the signer of the temporary certificate to the trusted authorities list on the computer in question. I normally do testing with certificates created with CACERT, and adding them to my trusted authorities list worked swimmingly. Doing it this way means you don't have to add any custom code to your application and it properly simulates what will happen when your application is deployed. As such, I think this is a superior solution to turning off the check programmatically. share|improve this answer answered Sep 20 '08 at 20:51 Simon Johnson 5,55152741 That was my first idea as well. Unfortunately the certificate is expired as well, so it is impossible to get it trusted. –jan.vdbergh Sep 20 '08 at 20:54 Is there any reason you can't use someone like CA cert? If it's a test cert then you could just go ahead with that. I'm not sure if there is a way to turn these checks off! –Simon Johnson Sep 20 '08 at 20:57 add a comment| up vote 101 down vote Alternatively you can register a call back delegate which ignores the certification error: ... ServicePointManager.ServerCertificateValidationCallback = MyCertHandler; ... static
- 1078 Comments - 13790 RSS Feed Rick's Sites Rick's GitHub Projects Rick's FoxPro Web Log West Wind Message Board CodePaste.net GeoCrumbs.net Rick's Products Markdown Monster WebSurge Html Help Builder Web Monitor Find this the remote certificate is invalid according to the validation procedure web service content useful? Consider making a small donation to show your support. Tweets by @RickStrahl HttpWebRequest c# servicepointmanager and Ignoring SSL Certificate Errors February 11, 2011 - from Chennai, Inida 22 comments Tweet sponsored by Man I can't believe this. I'm c# webclient ignore certificate errors still mucking around with OFX servers and it drives me absolutely crazy how some these servers are just so unbelievably misconfigured. I've recently hit three different 3 major brokerages which fail HTTP validation with bad or corrupt certificates http://stackoverflow.com/questions/109186/bypass-invalid-ssl-certificate-errors-when-calling-web-services-in-net at least according to the .NET WebRequest class. What's somewhat odd here though is that WinInet seems to find no issue with these servers - it's only .NET's Http client that's ultra finicky. So the question then becomes how do you tell HttpWebRequest to ignore certificate errors? In WinInet there used to be a host of flags to do this, but it's not quite so easy with WebRequest. Basically you need to configure the CertificatePolicy on the https://weblog.west-wind.com/posts/2011/feb/11/httpwebrequest-and-ignoring-ssl-certificate-errors ServicePointManager by creating a custom policy. Not exactly trivial. Here's the code to hook it up: public bool CreateWebRequestObject(string Url) { try { this.WebRequest = (HttpWebRequest) System.Net.WebRequest.Create(Url); if (this.IgnoreCertificateErrors) ServicePointManager.CertificatePolicy = delegate { return true; };}One thing to watch out for is that this an application global setting. There's one global ServicePointManagerand once you set this value any subsequent requests will inherit this policy as well, which may or may not be what you want. So it's probably a good idea to set the policy when the app starts and leave it be - otherwise you may run into odd behavior in some situations especially in multi-thread situations.Another way to deal with this is in you application .config file.
try to make a WebRequest to a server over https, you might run into the following exception. HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create("https://someurl.com/service/"); HttpWebResponse response = (HttpWebResponse)webRequest.GetResponse(); http://dejanstojanovic.net/aspnet/2014/september/bypass-ssl-certificate-validation/ "The underlying connection was closed: Could not establish trust relationship for the SSL/TLS http://weblogs.asp.net/smehaffie/calling-web-services-that-use-self-signed-certificates secure channel." inner Exception.Message is: "The remote certificate is invalid according 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 validation. Even if you try to access the URL to which you certificate error 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 true value. So before making a request, declare this callback method ServicePointManager.ServerCertificateValidationCallback = delegate { return true; }; ignore certificate error 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///