SQL Server

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.

SQL Server

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

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

    DECLARE @pdf int
    EXEC @hr = sp_OACreate 'Chilkat.Pdf', @pdf OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- Load the PDF that has already been signed.
    EXEC sp_OAMethod @pdf, 'LoadFile', @success OUT, 'qa_data/pdf/helloWorld_signed.pdf'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pdf
        RETURN
      END

    DECLARE @json int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @json OUT

    EXEC sp_OAMethod @json, 'UpdateBool', @success OUT, 'invisibleSignature', 1
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'subFilter', '/ETSI.RFC3161'

    EXEC sp_OAMethod @json, 'UpdateBool', @success OUT, '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.
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, '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.
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'timestampToken.tsaUsername', 'the_tsa_username'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, '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.)
    EXEC sp_OAMethod @json, 'UpdateBool', @success OUT, 'timestampToken.requestTsaCert', 1

    EXEC sp_OAMethod @pdf, 'SignPdf', @success OUT, @json, 'c:/temp/qa_output/helloWorld_signed_2.pdf'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pdf
        EXEC @hr = sp_OADestroy @json
        RETURN
      END


    PRINT 'Successfully added a Document Timestamp Signature to the PDF'

    EXEC @hr = sp_OADestroy @pdf
    EXEC @hr = sp_OADestroy @json


END
GO