AutoIt

Get PDF Signer Certs

See more PDF Signatures Examples

This example demonstrates how to validate the signatures in a PDF and also shows how to get AutoIt

Local $bSuccess = False

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

$oPdf = ObjCreate("Chilkat.Pdf")

; Load a PDF that has cryptographic signatures to be validated
$bSuccess = $oPdf.LoadFile("qa_data/pdf/sign_testing_1/helloSigned2.pdf")
If ($bSuccess = False) Then
    ConsoleWrite($oPdf.LastErrorText & @CRLF)
    Exit
EndIf

; Each time we verify a signature, information about the signature is written into
; sigInfo (replacing whatever sigInfo previously contained).
$oSigInfo = ObjCreate("Chilkat.JsonObject")

; Iterate over each signature and validate each.
Local $iNumSignatures = $oPdf.NumSignatures
Local $bValidated = False
$oCert = ObjCreate("Chilkat.Cert")
Local $i = 0
While $i < $iNumSignatures
    $bValidated = $oPdf.VerifySignature($i,$oSigInfo)
    ConsoleWrite("Signature " & $i & " validated: " & $bValidated & @CRLF)

    ; After calling VerifySignature, you can get the signer certificate by calling
    ; GetSignerCert with the same index. 
    $bSuccess = $oPdf.GetSignerCert($i,$oCert)
    If ($bSuccess <> False) Then
        ConsoleWrite("PDF signer certificate: " & $oCert.SubjectDN & @CRLF)
    EndIf

    $i = $i + 1
Wend

ConsoleWrite("Finished." & @CRLF)