AutoIt

Get the Server Certificate from a TLS Connection

Demonstrates Socket.GetServerCert, which copies the certificate presented by the remote TLS server into a Cert object for inspection.

Background. The method returns false when the socket is not connected, is not using TLS, or no server certificate is available. Inspecting the certificate lets an application validate the server's identity.

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Local $bSuccess = False

$oSocket = ObjCreate("Chilkat.Socket")

;  Connect to the server using TLS.
Local $bTls = True
Local $iMaxWaitMs = 5000
$bSuccess = $oSocket.Connect("example.com",5000,$bTls,$iMaxWaitMs)
If ($bSuccess = False) Then
    ConsoleWrite($oSocket.LastErrorText & @CRLF)
    Exit
EndIf

;  Copy the certificate presented by the remote TLS server, then inspect it.  This can be used to
;  validate the server's identity.
$oCert = ObjCreate("Chilkat.Cert")
$bSuccess = $oSocket.GetServerCert($oCert)
If ($bSuccess = False) Then
    ConsoleWrite($oSocket.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Server certificate subject: " & $oCert.SubjectCN & @CRLF)
ConsoleWrite("Issued by: " & $oCert.IssuerCN & @CRLF)