Classic ASP
Sign a PDF using SmartCard or HSM (Hardware Security Module)

This example demonstrates how to a sign a PDF using a smartcard or HSM (hardware security module).
Note: This example requires Chilkat v9.5.0.88 or greater.
Chilkat Classic ASP Downloads

Classic ASP
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0

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

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.
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.")

'  Use a certificate on a smartcard or USB token.
set cert = Server.CreateObject("Chilkat.Cert")

'  Provide the smartcard PIN.
'  Set the smartcard PIN prior to calling LoadFromSmartcard.
'  If the PIN is not explicitly provided here, the Windows OS should
'  display a dialog for the PIN.
cert.SmartCardPin = "123456"

'  Load the certificate on the smartcard currently in the reader (or on the USB token).
'  Pass an empty string to allow Chilkat to automatically choose the CSP (Cryptographi Service Provider).
'  See Load Certificate on Smartcard for information about explicitly selecting a particular CSP.
success = cert.LoadFromSmartcard("")
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_hsm.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 using an HSM.") & "</pre>"

%>
</body>
</html>