.NET Core C#

Require SSL Server Certificate Domain Match

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Demonstrates how to require that the SSL server certificate's domain matches the intended domain. .NET Core C#

bool success = false;

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.Http http = new Chilkat.Http();

// Call SetSslCertRequirement to require that the SSL server certificate's domain
// matches only the domain we are intending to communicate with.

// In this example we will test with the URL https://wrong.host.badssl.com/
// which intentionally has an SSL certificate that does not match "wrong.host.badssl.com"

http.SetSslCertRequirement("SAN","wrong.host.badssl.com");

// Also validate the server cert..
http.RequireSslCertVerify = true;

// Try sending the request.  It should fail within the SSL/TLS handshake
// because the server's certificate does not match the domain "wrong.host.badssl.com"
string html = http.QuickGetStr("https://wrong.host.badssl.com/");
if (http.LastMethodSuccess == false) {
    Debug.WriteLine(http.LastErrorText);
}
else {
    Debug.WriteLine("Unexpected success.");
}