Xbase++

Add a Document Timestamp Signature to an already-signed PDF

See more PDF Signatures Examples

Demonstrates how to add a document timestamp signature to an already-signed PDF.

Note: This example requires Chilkat v9.5.0.99 or greater.

Xbase++

LOCAL nSuccess
LOCAL oPdf
LOCAL oJson

nSuccess := 0

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

oPdf := CreateObject("Chilkat.Pdf")

//  Load the PDF that has already been signed.
nSuccess := oPdf:LoadFile("qa_data/pdf/helloWorld_signed.pdf")
IF (nSuccess == 0)
    ? oPdf:LastErrorText
    oPdf:destroy()
    RETURN
ENDIF

oJson := CreateObject("Chilkat.JsonObject")

oJson:UpdateBool("invisibleSignature", 1)
oJson:UpdateString("subFilter", "/ETSI.RFC3161")

oJson:UpdateBool("timestampToken.enabled", 1)

//  In this example, we'll use a free TSA server (timestamp.digicert.com), but you may want to use your own timestamp authority server.
oJson:UpdateString("timestampToken.tsaUrl", "http://timestamp.digicert.com")

//  If the timestamp server requires a username/password, do the following.  Otherwise omit the following few lines of code.
oJson:UpdateString("timestampToken.tsaUsername", "the_tsa_username")
oJson:UpdateString("timestampToken.tsaPassword", "the_tsa_password")

//  When requesting the timestamp token, ask the server to include its certificate in the timestamp token response.
//  This allows for the timestamp server's certificate to be included in the LTV validation (i.e. if the timestamp server
//  has an OCSP URL, then Chilkat will also do the OCSP request for the timestamp server's certificate.)
oJson:UpdateBool("timestampToken.requestTsaCert", 1)

nSuccess := oPdf:SignPdf(oJson, "c:/temp/qa_output/helloWorld_signed_2.pdf")
IF (nSuccess == 0)
    ? oPdf:LastErrorText
    oPdf:destroy()
    oJson:destroy()
    RETURN
ENDIF

? "Successfully added a Document Timestamp Signature to the PDF"

oPdf:destroy()
oJson:destroy()