(AutoIt) IMAP Download and Verify Signed (S/MIME) Email

Demonstrates how to download and verify digitally signed S/MIME email.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Local $bSuccess = False

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

$oImap = ObjCreate("Chilkat.Imap")

; Connect to an IMAP server.
; Use TLS
$oImap.Ssl = True
$oImap.Port = 993
$bSuccess = $oImap.Connect("imap.example.com")
If ($bSuccess = False) Then
    ConsoleWrite($oImap.LastErrorText & @CRLF)
    Exit
EndIf

$bSuccess = $oImap.Login("myLogin","myPassword")
If ($bSuccess = False) Then
    ConsoleWrite($oImap.LastErrorText & @CRLF)
    Exit
EndIf

; Select an IMAP mailbox
$bSuccess = $oImap.SelectMailbox("Inbox")
If ($bSuccess = False) Then
    ConsoleWrite($oImap.LastErrorText & @CRLF)
    Exit
EndIf

; We can choose to fetch UIDs or sequence numbers.
Local $bFetchUids = True

; Get the message IDs of all the emails in the mailbox
$oMessageSet = ObjCreate("Chilkat.MessageSet")
$bSuccess = $oImap.QueryMbx("ALL",$bFetchUids,$oMessageSet)
If ($bSuccess = False) Then
    ConsoleWrite($oImap.LastErrorText & @CRLF)
    Exit
EndIf

$oEmail = ObjCreate("Chilkat.Email")
$oCert = ObjCreate("Chilkat.Cert")

Local $i = 0
While $i < $oMessageSet.Count

Local $sUid = $oMessageSet.GetId($i)
    ConsoleWrite("uid: " & $sUid & @CRLF)

    $bSuccess = $oImap.FetchEmail(False,$sUid,True,$oEmail)
    If ($bSuccess = False) Then
        ConsoleWrite($oImap.LastErrorText & @CRLF)
        Exit
    EndIf

    ; The security layers of signed and/or encrypted emails
    ; are automatically "unwrapped" when loaded into
    ; a Chilkat email object.
    ; An application only needs to check to see if an email
    ; was received signed or encrypted, and then examine
    ; the success/failure.  For example:
    If ($oEmail.ReceivedSigned = True) Then

        ConsoleWrite("This email was signed." & @CRLF)

        ; Check to see if the signatures were verified.
        If ($oEmail.SignaturesValid = True) Then
            ConsoleWrite("Digital signature(s) verified." & @CRLF)
            ConsoleWrite("Signer: " & $oEmail.SignedBy & @CRLF)

            ; Get the certificate used for signing.
            $bSuccess = $oEmail.LastSignerCert(0,$oCert)

            If ($bSuccess = False) Then
                ConsoleWrite("Failed to get signing certificate object." & @CRLF)
            Else
                ConsoleWrite("Signing cert: " & $oCert.SubjectCN & @CRLF)
            EndIf

        Else
            ConsoleWrite("Digital signature verification failed." & @CRLF)
        EndIf

    EndIf

    $i = $i + 1
Wend

; Disconnect from the IMAP server.
$bSuccess = $oImap.Disconnect()