DataFlex

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.

DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoPdf
    Variant vJson
    Handle hoJson
    String sTemp1

    Move False To iSuccess

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

    Get Create (RefClass(cComChilkatPdf)) To hoPdf
    If (Not(IsComObjectCreated(hoPdf))) Begin
        Send CreateComObject of hoPdf
    End

    // Load the PDF that has already been signed.
    Get ComLoadFile Of hoPdf "qa_data/pdf/helloWorld_signed.pdf" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPdf To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatJsonObject)) To hoJson
    If (Not(IsComObjectCreated(hoJson))) Begin
        Send CreateComObject of hoJson
    End

    Get ComUpdateBool Of hoJson "invisibleSignature" True To iSuccess
    Get ComUpdateString Of hoJson "subFilter" "/ETSI.RFC3161" To iSuccess

    Get ComUpdateBool Of hoJson "timestampToken.enabled" True To iSuccess

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

    // If the timestamp server requires a username/password, do the following.  Otherwise omit the following few lines of code.
    Get ComUpdateString Of hoJson "timestampToken.tsaUsername" "the_tsa_username" To iSuccess
    Get ComUpdateString Of hoJson "timestampToken.tsaPassword" "the_tsa_password" To iSuccess

    // 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.)
    Get ComUpdateBool Of hoJson "timestampToken.requestTsaCert" True To iSuccess

    Get pvComObject of hoJson to vJson
    Get ComSignPdf Of hoPdf vJson "c:/temp/qa_output/helloWorld_signed_2.pdf" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPdf To sTemp1
        Showln sTemp1
        Procedure_Return
    End

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


End_Procedure