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How to accept ssl cert automatically through httpRequest?

Hi

I use the code to get the xml return from a web service.

It throws exception:

System.Net.WebException: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. ---> System.Security.Authentication.AuthenticationException: The remote certificate is invalid according to the validation procedure.

How can I code it in VC# to automatically accept the cert?

I use ASP.NET and C#.

WebRequest request = WebRequest.Create(url);
WebResponse response = request.GetResponse();

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GiftsonDJohn

If the SSL certificate is not valid it will throw the error. You can override the Certificate Check by using following code.

ServicePointManager.ServerCertificateValidationCallback += new RemoteCertificateValidationCallback(CheckServerCertificateValid);
 
private static bool CheckServerCertificateValid(object sender, X509Certificate cert, X509Chain chain, SslPolicyErrors error)
        {
            if (cert.Subject.Equals("CN=xxxx, OU=xxxx, O=xxxx, L=xxxx, S=xx, C=xx"))
            {
 
                return true;
 
            }
 
            return false;
 
        }

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GiftsonDJohn

I have did a validation check to bypass the certificate only from a desired server. If you want to enable all certificates, just ignore the conditions. The value for the certificate validation can be obtained from your certificate properties.

techques

ASKER

The type or namespace name 'X509Certificate' could not be found (are you missing a using directive or an assembly reference?)

GiftsonDJohn

please include

using System.Security.Cryptography.X509Certificates;

techques

ASKER

yes, i included using System.Security.Cryptography.X509Certificates;

The type or namespace name 'SslPolicyErrors' could not be found

techques

ASKER

I added
using System.Net.Security and it can compile. However, when I run your code, it throws the same error:

System.Net.WebException: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. ---> System.Security.Authentication.AuthenticationException: The remote certificate is invalid according to the validation procedure

It did not bypass the cert.

GiftsonDJohn

Can you please post the code?

techques

ASKER

Here is the code:

string h = "https://Hostmachine/csdb/servlet/Check?MSISDN="+me+"&Username=username&Password=password";

was tested with real ip, username and password

    private string Check(string me)
    {
        string h = "https://Hostmachine/servlet/Check?MSISDN="+me+"&Username=username&Password=password";
        ServicePointManager.ServerCertificateValidationCallback += new RemoteCertificateValidationCallback(CheckServerCertificateValid);
 
        WebRequest request = WebRequest.Create(h);
        WebResponse response = request.GetResponse();
 
        Stream s = response.GetResponseStream();
        StreamReader sreader = new StreamReader(s);
        String str = sreader.ReadToEnd();
        XmlDocument doc = new XmlDocument();
        doc.LoadXml(str);
        XmlNode node = doc.SelectSingleNode("//sourcecode");
        string str_code = node.InnerText;
        string str_num = "";
 
        if (str_code.Equals("500"))
        {
            str_num = "505";
        }
        return str_num;
    }
 
    private static bool CheckServerCertificateValid(object sender, X509Certificate cert, X509Chain chain, SslPolicyErrors error)
    {
        if (cert.Subject.Equals("CN=xxxx, OU=xxxx, O=xxxx, L=xxxx, S=xx, C=xx"))
        {
            return true;
        }
        return false;
    }

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ASKER CERTIFIED SOLUTION

GiftsonDJohn

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