For this to work your project will need a reference to System.Security
:
using System.Security;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
//Do webrequest to get info on secure site
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://mail.google.com");
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
response.Close();
//retrieve the ssl cert and assign it to an X509Certificate object
X509Certificate cert = request.ServicePoint.Certificate;
//convert the X509Certificate to an X509Certificate2 object by passing it into the constructor
X509Certificate2 cert2 = new X509Certificate2(cert);
string cn = cert2.GetIssuerName();
string cedate = cert2.GetExpirationDateString();
string cpub = cert2.GetPublicKeyString();
//display the cert dialog box
X509Certificate2UI.DisplayCertificate(cert2);
.Net Core 2.1
You can use HttpClientHandler and ServerCertificateCustomValidationCallback Property. (This class is available in .net 4.7.1 and above also).
var handler = new HttpClientHandler
{
UseDefaultCredentials = true,
ServerCertificateCustomValidationCallback = (sender, cert, chain, error) =>
{
/// Access cert object.
return true;
}
};
using (HttpClient client = new HttpClient(handler))
{
using (HttpResponseMessage response = await client.GetAsync("https://mail.google.com"))
{
using (HttpContent content = response.Content)
{
}
}
}
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