AutoIt

CoSign PKCS7/CMS Signed Data

See more Digital Signatures Examples

Demonstrates how to add a 2nd signature to a CMS SignedData. This is to add an additional signature, SignerInfo and certificate(s) to an existing CMS signed data.

In this example, we cosign an existing pdf.p7s

Note: The CoSign method is added in Chilkat v9.5.0.89.

AutoIt

Local $bSuccess = False

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

$oCrypt = ObjCreate("Chilkat.Crypt2")
$oCert = ObjCreate("Chilkat.Cert")

; If loading from a smart card, set the smartcard PIN.
$oCert.SmartCardPin = "0000"

; Load a certificate in some way, such as from a smart card.
; Chilkat provides other methods to load from a .pfx, .pem, or from the Windows certificate stores..
$bSuccess = $oCert.LoadFromSmartcard("")
If ($bSuccess = False) Then
    ConsoleWrite($oCert.LastErrorText & @CRLF)
    Exit
EndIf

$bSuccess = $oCrypt.SetSigningCert($oCert)
If ($bSuccess = False) Then
    ConsoleWrite($oCrypt.LastErrorText & @CRLF)
    Exit
EndIf

; Load the file to be co-signed.
; NOTE:  This is to cosign a PDF file contained within a CMS (PKCS7) message.
; (In other words, the PDF is contained within the CMS SignedData, rather than the other way around
; where a CMS signature is contained within a PDF.  Use Chilkat's PDF class to sign a PDF, which is
; to embed a CMS signature within the PDF.)
$oBd = ObjCreate("Chilkat.BinData")
$bSuccess = $oBd.LoadFile("qa_data/p7s/cosign/sample.pdf.p7s")
If ($bSuccess = False) Then
    ConsoleWrite("Failed to load pdf.p7s input file." & @CRLF)
    Exit
EndIf

; bd2 will contain the co-signed result.
$oBd2 = ObjCreate("Chilkat.BinData")
$bSuccess = $oCrypt.CoSign($oBd,$oCert,$oBd2)
If ($bSuccess = False) Then
    ConsoleWrite($oCrypt.LastErrorText & @CRLF)
    Exit
EndIf

$bSuccess = $oBd.WriteFile("qa_output/cosigned.pdf.p7s")
If ($bSuccess = False) Then
    ConsoleWrite("Failed to save pdf.p7s output file." & @CRLF)
    Exit
EndIf

ConsoleWrite("Success!" & @CRLF)