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(Classic ASP) Sign a PDF using Certificate from Windows Certificate StoreSee more PDF Signatures ExamplesThis example demonstrates how to a sign a PDF using a certificate from the Windows Certificate Store. Note: This example requires Chilkat v9.5.0.85 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 a PDF to be signed. ' The "hello.pdf" is available at https://chilkatsoft.com/hello.pdf success = pdf.LoadFile("qa_data/pdf/hello.pdf") If (success = 0) Then Response.Write "<pre>" & Server.HTMLEncode( pdf.LastErrorText) & "</pre>" Response.End End If ' Options for signing are specified in JSON. ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.JsonObject") set json = Server.CreateObject("Chilkat.JsonObject") ' In most cases, the signingCertificateV2 and signingTime attributes are required. success = json.UpdateInt("signingCertificateV2",1) success = json.UpdateInt("signingTime",1) ' Put the signature on page 1, top left success = json.UpdateInt("page",1) success = json.UpdateString("appearance.y","top") success = json.UpdateString("appearance.x","left") ' Use a font scale of 10.0 success = json.UpdateString("appearance.fontScale","10.0") ' In this example, the appearance of the digital signature will contain three lines: ' 1) The signing certificate's common name ' 2) The current date/time ' 3) Some arbitrary text. ' The keyword "cert_cn" is replaced with the Certificate's Subject Common Name. ' The keyword "current_dt" is replaced with the current date/time. ' Any number of appearance text lines can be added. success = json.UpdateString("appearance.text[0]","Digitally signed by: cert_cn") success = json.UpdateString("appearance.text[1]","current_dt") success = json.UpdateString("appearance.text[2]","The crazy brown fox jumps over the lazy dog.") ' Load a certificate by specifying the common name ("CN" part of the certificate's Subject) ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Cert") set cert = Server.CreateObject("Chilkat.Cert") success = cert.LoadByCommonName("Xyz Widgets, Inc.") If (success = 0) Then Response.Write "<pre>" & Server.HTMLEncode( cert.LastErrorText) & "</pre>" Response.End End If ' Tell the pdf object to use the certificate for signing. success = pdf.SetSigningCert(cert) If (success = 0) Then Response.Write "<pre>" & Server.HTMLEncode( pdf.LastErrorText) & "</pre>" Response.End End If success = pdf.SignPdf(json,"qa_output/hello_signed.pdf") If (success = 0) Then Response.Write "<pre>" & Server.HTMLEncode( pdf.LastErrorText) & "</pre>" Response.End End If Response.Write "<pre>" & Server.HTMLEncode( "The PDF has been successfully cryptographically signed.") & "</pre>" %> </body> </html> |
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