Unexpected error occurred running a simple unauthorized Rest query

Question

I have a rest endpoint that doesn\'t perform an authentication check. I can run a simple curl commmand from Linux:

curl -k https://application/api/about
<         


        

Answer 1

Using:

[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12

Taken from Powershell 3.0 Invoke-WebRequest HTTPS Fails on All Requests.

Answer 2

in my case the TLS trick did not work, this seems to be a bug in powershell. you need to add the callback using .net code instead of a scriptblock.

#C# class to create callback
$code = @"
public class SSLHandler
{
    public static System.Net.Security.RemoteCertificateValidationCallback GetSSLHandler()
    {

        return new System.Net.Security.RemoteCertificateValidationCallback((sender, certificate, chain, policyErrors) => { return true; });
    }

}
"@

#compile the class
Add-Type -TypeDefinition $code

#disable checks using new class
[System.Net.ServicePointManager]::ServerCertificateValidationCallback = [SSLHandler]::GetSSLHandler()
#do the request
try
{
    invoke-WebRequest -Uri myurl -UseBasicParsing
} catch {
    # do something
} finally {
   #enable checks again
   [System.Net.ServicePointManager]::ServerCertificateValidationCallback = $null
}

Answer 3

[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls -bor [Net.SecurityProtocolType]::Tls11 -bor [Net.SecurityProtocolType]::Tls12

Works in Windows server 2016

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