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Certify a PDF and Lock the Entire Document

See more PDF Signatures Examples

This example demonstrates how to a sign a certify a PDF and lock the entire document. Normally this is intended to seal the document with a final approving (or dissapproving) signature; usually after a review workflow is completed and normally reserved for the creator or author of a document. 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 to be certified and locked.
;  The "hello.pdf" is available at https://chilkatsoft.com/hello.pdf
$bSuccess = $oPdf.LoadFile("qa_data/pdf/hello.pdf")
If ($bSuccess = False) Then
    ConsoleWrite($oPdf.LastErrorText & @CRLF)
    Exit
EndIf

;  Options for signing are specified in JSON.
$oJson = ObjCreate("Chilkat.JsonObject")

;  In most cases, the signingCertificateV2 and signingTime attributes are required.
$oJson.UpdateInt("signingCertificateV2",1)
$oJson.UpdateInt("signingTime",1)

;  The only coding difference with certifying and locking a PDF
;  as compared with an approval signature (also known as recipient signature)
;  is to add the "lockAfterSigning" and "docMDP.add" to the json.
$oJson.UpdateBool("lockAfterSigning",True)
$oJson.UpdateBool("docMDP.add",True)

;  Put the signature on page 1, top left
$oJson.UpdateInt("page",1)
$oJson.UpdateString("appearance.y","top")
$oJson.UpdateString("appearance.x","left")

;  Use a font scale of 10.0
$oJson.UpdateString("appearance.fontScale","10.0")

;  In this example, the appearance of the digital signature will contain three lines:
;  1) The signing certificate's common name
;  2) The current date/time
;  3) Some arbitrary text.
;  The keyword "cert_cn" is replaced with the Certificate's Subject Common Name.
;  The keyword "current_dt" is replaced with the current date/time.
;  Any number of appearance text lines can be added.
$oJson.UpdateString("appearance.text[0]","Digitally signed by: cert_cn")
$oJson.UpdateString("appearance.text[1]","current_dt")
$oJson.UpdateString("appearance.text[2]","The crazy brown fox jumps over the lazy dog.")

;  Load the signing certificate. (Use your own certificate.)
$oCert = ObjCreate("Chilkat.Cert")
$bSuccess = $oCert.LoadPfxFile("qa_data/pfx/myPdfSigningCert.pfx","secret")
If ($bSuccess = False) Then
    ConsoleWrite($oCert.LastErrorText & @CRLF)
    Exit
EndIf

;  Tell the pdf object to use the certificate for signing.
$bSuccess = $oPdf.SetSigningCert($oCert)
If ($bSuccess = False) Then
    ConsoleWrite($oPdf.LastErrorText & @CRLF)
    Exit
EndIf

$bSuccess = $oPdf.SignPdf($oJson,"qa_output/hello_signed.pdf")
If ($bSuccess = False) Then
    ConsoleWrite($oPdf.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("The PDF has been successfully certified and locked." & @CRLF)