(VB.NET) Sign PDF using ARSS (Aruba Remote Signing Service)

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Demonstrates how to sign a PDF using the Aruba Remote Signing Service (ARSS).

Note: This example requires Chilkat v9.5.0.96 or greater.

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

Dim pdf As New Chilkat.Pdf

' Load a PDF to be signed.
Dim success As Boolean = pdf.LoadFile("qa_data/pdf/hello.pdf")
If (success = False) Then
    Debug.WriteLine(pdf.LastErrorText)
    Exit Sub
End If


' Options for signing are specified in JSON.
Dim json As New Chilkat.JsonObject

' Indicate that we want an LTV-enabled signature
json.UpdateBool("ltvOcsp",True)

' Define the appearance of the signature.
json.UpdateInt("page",1)
json.UpdateString("appearance.y","top")
json.UpdateString("appearance.x","left")
json.UpdateString("appearance.fontScale","10.0")
json.UpdateString("appearance.text[0]","Digitally signed by: cert_cn")
json.UpdateString("appearance.text[1]","current_dt")
json.UpdateString("appearance.text[2]","This is an LTV-enabled signature.")

' Load the certificate used for signing.  The certificate's private key is stored on 
' the Aruba.it server and the signing will happen remotely using the
' ARSS (Aruba Remote Signing Service).
' However, we still need the certificate locally (without private key).
Dim cert As New Chilkat.Cert
success = cert.LoadFromFile("qa_data/certs/myCert.cer")
If (success = False) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If


' To sign using the Aruba Remote Signing Service, 
' add the following lines of code to specify your authentication credentials,
' and the ID of the certificate w/ private key on the server to be used.
Dim jsonArss As New Chilkat.JsonObject

' Set the "service" equal to "ARSS" to tell Chilkat to use ARSS for signing.
jsonArss.UpdateString("service","ARSS")
' Specify the certificate ID, such as "AS0"
' This certificate should match the certificate loaded in the above code.
jsonArss.UpdateString("certID","YOUR_ARSS_CERT_ID")
jsonArss.UpdateString("otpPwd","YOUR_OTP_PWD")
jsonArss.UpdateString("typeOtpAuth","demoprod")
jsonArss.UpdateString("user","YOUR_ARSS_USERNAME")
jsonArss.UpdateString("userPWD","YOUR_ARSS_PASSWORD")
success = cert.SetCloudSigner(jsonArss)

' Tell the pdf object to use the certificate for signing.
success = pdf.SetSigningCert(cert)
If (success = False) Then
    Debug.WriteLine(pdf.LastErrorText)
    Exit Sub
End If


' Chilkat will build the signed PDF locally, but will (internally) use ARSS
' to do the RSA sign hash operation.
success = pdf.SignPdf(json,"qa_output/hello_ltv_signed.pdf")
If (success = False) Then
    Debug.WriteLine(pdf.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("The PDF has been successfully cryptographically signed with long-term validation.")