(PowerBuilder) Create CAdES p7m using AWS KMS to Sign in the Cloud

See more Signing in the Cloud Examples

Demonstrates how to create a CAdES p7m, using AWS KMS. The signing of the hash happens in the Cloud on AWS KMS. Everything else regarding the creation of CAdES happens locally within Chilkat.

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

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integer li_rc
oleobject loo_Cert
integer li_Success
oleobject loo_JsonAwsKms
oleobject loo_Crypt
oleobject loo_SignedAttrs
string ls_InputXmlPath
string ls_OutputP7mPath

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

// Load the certificate used for signing.  The certificate's private key is stored in 
// the Azure Key Vault.
// However, we still need the certificate locally (without private key).
loo_Cert = create oleobject
li_rc = loo_Cert.ConnectToNewObject("Chilkat_9_5_0.Cert")
if li_rc < 0 then
    destroy loo_Cert
    MessageBox("Error","Connecting to COM object failed")
    return
end if
li_Success = loo_Cert.LoadFromFile("qa_data/certs/myCert.cer")
if li_Success = 0 then
    Write-Debug loo_Cert.LastErrorText
    destroy loo_Cert
    return
end if

// Here's a screenshot showing the key ID of a private key in AWS KMS:


// To sign using AWS KMS, 
// add the following lines of code to specify your AWS authentication credentials,
// and the ID of the KMS private key.
loo_JsonAwsKms = create oleobject
li_rc = loo_JsonAwsKms.ConnectToNewObject("Chilkat_9_5_0.JsonObject")

// Set the "service" equal to "aws_kms" to tell Chilkat to use AWS KMS for signing.
loo_JsonAwsKms.UpdateString("service","aws_kms")
loo_JsonAwsKms.UpdateString("access_key","ACCESS_KEY")
loo_JsonAwsKms.UpdateString("secret_key","SECRET_KEY")
// Make sure to specify the correct region for your case.
loo_JsonAwsKms.UpdateString("region","us-west-2")
// In the above screenshot, our key ID is "187012e8-008f-4fc7-b100-5efe6146dff2".  You will use your key ID.
loo_JsonAwsKms.UpdateString("key_id","187012e8-008f-4fc7-b100-5efe6146dff2")

li_Success = loo_Cert.SetCloudSigner(loo_JsonAwsKms)

loo_Crypt = create oleobject
li_rc = loo_Crypt.ConnectToNewObject("Chilkat_9_5_0.Crypt2")

li_Success = loo_Crypt.SetSigningCert(loo_Cert)
if li_Success = 0 then
    Write-Debug loo_Crypt.LastErrorText
    destroy loo_Cert
    destroy loo_JsonAwsKms
    destroy loo_Crypt
    return
end if

// The CadesEnabled property applies to all methods that create PKCS7 signatures. 
// To create a CAdES-BES signature, set this property equal to true.
loo_Crypt.CadesEnabled = 1

loo_Crypt.HashAlgorithm = "sha256"

loo_SignedAttrs = create oleobject
li_rc = loo_SignedAttrs.ConnectToNewObject("Chilkat_9_5_0.JsonObject")

loo_SignedAttrs.UpdateInt("contentType",1)
loo_SignedAttrs.UpdateInt("signingTime",1)
loo_SignedAttrs.UpdateInt("messageDigest",1)
loo_SignedAttrs.UpdateInt("signingCertificateV2",1)
loo_Crypt.SigningAttributes = loo_SignedAttrs.Emit()

// You can sign any type of file..
ls_InputXmlPath = "qa_data/e-Invoice.xml"
ls_OutputP7mPath = "qa_output/signed.p7m"

// Create the CAdES-BES attached signature, which contains the original data.
// Chilkat will build the .p7m locally, but will (internally) use ARSS
// to do the RSA signing remotely.
li_Success = loo_Crypt.CreateP7M(ls_InputXmlPath,ls_OutputP7mPath)
if li_Success = 0 then
    Write-Debug loo_Crypt.LastErrorText
    destroy loo_Cert
    destroy loo_JsonAwsKms
    destroy loo_Crypt
    destroy loo_SignedAttrs
    return
end if

Write-Debug "Success."


destroy loo_Cert
destroy loo_JsonAwsKms
destroy loo_Crypt
destroy loo_SignedAttrs