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(C++) 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.
#include <CkPdf.h> #include <CkJsonObject.h> void ChilkatSample(void) { // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. CkPdf pdf; // Load the PDF that has already been signed. bool success = pdf.LoadFile("qa_data/pdf/helloWorld_signed.pdf"); if (success == false) { std::cout << pdf.lastErrorText() << "\r\n"; return; } CkJsonObject json; json.UpdateBool("invisibleSignature",true); json.UpdateString("subFilter","/ETSI.RFC3161"); json.UpdateBool("timestampToken.enabled",true); // In this example, we'll use a free TSA server (timestamp.digicert.com), but you may want to use your own timestamp authority server. 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. json.UpdateString("timestampToken.tsaUsername","the_tsa_username"); 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.) json.UpdateBool("timestampToken.requestTsaCert",true); success = pdf.SignPdf(json,"c:/temp/qa_output/helloWorld_signed_2.pdf"); if (success == false) { std::cout << pdf.lastErrorText() << "\r\n"; return; } std::cout << "Successfully added a Document Timestamp Signature to the PDF" << "\r\n"; } |
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