(PowerBuilder) Sign PDF using ARSS (Aruba Remote Signing Service)

See more Signing in the Cloud Examples

Demonstrates how to digitally sign a PDF using the Aruba Remote Signing Service (ARSS). The example loads a local PDF and certificate, configures the ARSS cloud signer credentials, specifies the OTP authentication type with typeOtpAuth, and creates an LTV-enabled signed PDF where the private key remains protected on the Aruba signing server.

Note: This example requires Chilkat v11.5.0 or greater.

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integer li_rc
integer li_Success
oleobject loo_Pdf
oleobject loo_Json
oleobject loo_Cert
oleobject loo_JsonArss

li_Success = 0

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

loo_Pdf = create oleobject
li_rc = loo_Pdf.ConnectToNewObject("Chilkat.Pdf")
if li_rc < 0 then
    destroy loo_Pdf
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// Load the PDF that will be digitally signed.
li_Success = loo_Pdf.LoadFile("qa_data/pdf/hello.pdf")
if li_Success = 0 then
    Write-Debug loo_Pdf.LastErrorText
    destroy loo_Pdf
    return
end if

// Signing options are specified in a JSON object.
loo_Json = create oleobject
li_rc = loo_Json.ConnectToNewObject("Chilkat.JsonObject")

// Enable LTV (Long-Term Validation).
// When ltvOcsp is true, OCSP validation information is embedded in the PDF
// so that signature validation can continue to succeed in the future,
// even if the original OCSP responder is no longer available.
loo_Json.UpdateBool("ltvOcsp",1)

// Specify the visual appearance of the signature on the PDF page.
loo_Json.UpdateInt("page",1)
loo_Json.UpdateString("appearance.y","top")
loo_Json.UpdateString("appearance.x","left")
loo_Json.UpdateString("appearance.fontScale","10.0")

// Text lines displayed in the visible signature appearance.
// Special values such as "cert_cn" and "current_dt" are replaced
// with the certificate common name and current date/time.
loo_Json.UpdateString("appearance.text[0]","Digitally signed by: cert_cn")
loo_Json.UpdateString("appearance.text[1]","current_dt")
loo_Json.UpdateString("appearance.text[2]","This is an LTV-enabled signature.")

// Load the signing certificate.
// 
// The private key is NOT stored locally.  Instead, the private key is
// stored and protected on the Aruba Remote Signing Service (ARSS).
// 
// Even though the signing operation will occur remotely, Chilkat still
// needs the corresponding public certificate locally so that it can
// construct the CMS/PAdES signature and embed the certificate chain
// in the signed PDF.
loo_Cert = create oleobject
li_rc = loo_Cert.ConnectToNewObject("Chilkat.Cert")

li_Success = loo_Cert.LoadFromFile("qa_data/certs/myCert.cer")
if li_Success = 0 then
    Write-Debug loo_Cert.LastErrorText
    destroy loo_Pdf
    destroy loo_Json
    destroy loo_Cert
    return
end if

// Configure Aruba Remote Signing Service (ARSS) credentials.
// 
// When SetCloudSigner is called, Chilkat is instructed to perform
// cryptographic signing operations through the ARSS web service.
// The PDF is assembled locally, but the actual RSA signature operation
// is performed remotely using the private key held by Aruba.
loo_JsonArss = create oleobject
li_rc = loo_JsonArss.ConnectToNewObject("Chilkat.JsonObject")

// Required.  Indicates that the cloud signing provider is ARSS.
loo_JsonArss.UpdateString("service","ARSS")

// The ARSS certificate identifier (for example, "AS0").
// This identifies which remote certificate/private key pair should be used.
// The remote certificate should correspond to the certificate loaded above.
loo_JsonArss.UpdateString("certID","YOUR_ARSS_CERT_ID")

// OTP password associated with the Aruba remote-signing account.
// Depending on the ARSS configuration, an OTP may be required to
// authorize each signing operation.
loo_JsonArss.UpdateString("otpPwd","YOUR_OTP_PWD")

// Specifies the OTP authentication environment.
// 
// Common values are:
//   "demoprod" - Demo/Test environment
//   "prod"     - Production environment
// 
// This value is sent to the ARSS service and determines how the OTP
// authentication is validated.  The correct value depends on the type
// of Aruba account and environment that has been provisioned.
// 
// If signing fails with an authentication-related error, verify that
// the typeOtpAuth value matches the environment associated with the
// ARSS account credentials being used.
loo_JsonArss.UpdateString("typeOtpAuth","demoprod")

// ARSS account username.
loo_JsonArss.UpdateString("user","YOUR_ARSS_USERNAME")

// ARSS account password.
loo_JsonArss.UpdateString("userPWD","YOUR_ARSS_PASSWORD")

// Beginning with Chilkat v11.5.0, the ARSS endpoint can be explicitly
// specified.  This allows the application to target a particular
// Aruba signing service endpoint when required.
loo_JsonArss.UpdateString("endpoint","https://app1.firma-remota.it/ArubaSignerService/webresources/signerservice")

li_Success = loo_Cert.SetCloudSigner(loo_JsonArss)
if li_Success = 0 then
    Write-Debug loo_Cert.LastErrorText
    destroy loo_Pdf
    destroy loo_Json
    destroy loo_Cert
    destroy loo_JsonArss
    return
end if

// Associate the certificate with the PDF object.
// All subsequent signing operations will use this certificate.
li_Success = loo_Pdf.SetSigningCert(loo_Cert)
if li_Success = 0 then
    Write-Debug loo_Pdf.LastErrorText
    destroy loo_Pdf
    destroy loo_Json
    destroy loo_Cert
    destroy loo_JsonArss
    return
end if

// Create the signed PDF.
// 
// Chilkat performs all PDF processing locally.  When the time comes
// to generate the cryptographic signature value, Chilkat sends the
// hash to ARSS, which signs it using the remote private key and returns
// the signature.  The private key never leaves the Aruba service.
li_Success = loo_Pdf.SignPdf(loo_Json,"qa_output/hello_ltv_signed.pdf")
if li_Success = 0 then
    Write-Debug loo_Pdf.LastErrorText
    destroy loo_Pdf
    destroy loo_Json
    destroy loo_Cert
    destroy loo_JsonArss
    return
end if

Write-Debug "The PDF has been successfully cryptographically signed with long-term validation."


destroy loo_Pdf
destroy loo_Json
destroy loo_Cert
destroy loo_JsonArss