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(Classic ASP) Add a Document Timestamp Signature to an already-signed PDFSee more PDF Signatures ExamplesDemonstrates how to add a document timestamp signature to an already-signed PDF. Note: This example requires Chilkat v9.5.0.99 or greater.
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body> <% ' This example requires the Chilkat API to have been previously unlocked. ' See Global Unlock Sample for sample code. ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Pdf") set pdf = Server.CreateObject("Chilkat.Pdf") ' Load the PDF that has already been signed. success = pdf.LoadFile("qa_data/pdf/helloWorld_signed.pdf") If (success = 0) Then Response.Write "<pre>" & Server.HTMLEncode( pdf.LastErrorText) & "</pre>" Response.End End If ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.JsonObject") set json = Server.CreateObject("Chilkat.JsonObject") success = json.UpdateBool("invisibleSignature",1) success = json.UpdateString("subFilter","/ETSI.RFC3161") success = json.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. success = json.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. success = json.UpdateString("timestampToken.tsaUsername","the_tsa_username") success = json.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.) success = json.UpdateBool("timestampToken.requestTsaCert",1) success = pdf.SignPdf(json,"c:/temp/qa_output/helloWorld_signed_2.pdf") If (success = 0) Then Response.Write "<pre>" & Server.HTMLEncode( pdf.LastErrorText) & "</pre>" Response.End End If Response.Write "<pre>" & Server.HTMLEncode( "Successfully added a Document Timestamp Signature to the PDF") & "</pre>" %> </body> </html> |
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