Visual FoxPro

Create CAdES p7m using Azure Key Vault to Sign in the Cloud

See more Signing in the Cloud Examples

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

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

Visual FoxPro

LOCAL lnSuccess
LOCAL loCert
LOCAL loJsonAzure
LOCAL loCrypt
LOCAL loSignedAttrs
LOCAL lcInputXmlPath
LOCAL lcOutputP7mPath

lnSuccess = 0

* 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).
loCert = CreateObject('Chilkat.Cert')
lnSuccess = loCert.LoadFromFile("qa_data/certs/myCert.cer")
IF (lnSuccess = 0) THEN
    ? loCert.LastErrorText
    RELEASE loCert
    CANCEL
ENDIF

* Here's a screenshot of our certificate with private key on Azure Key Vault:
* (image:https://example-code.com/images/azure_key_vault.jpg/endImage)

* To sign using the Azure Key Vault, 
* add the following lines of code to specify your authentication credentials,
* and the name of the certificate w/ private key on the Azure server to be used.
loJsonAzure = CreateObject('Chilkat.JsonObject')
* Set the "service" equal to "azure_keyvault" to tell Chilkat to use Azure Key Vault for signing.
loJsonAzure.UpdateString("service","azure_keyvault")
loJsonAzure.UpdateString("client_id","APP_ID")
loJsonAzure.UpdateString("client_secret","APP_PASSWORD")
loJsonAzure.UpdateString("tenant_id","TENANT_ID")
* In the above screenshot, our vault name is "kvchilkat".  You will use your vault name.
loJsonAzure.UpdateString("vault_name","VAULT_NAME")
* In the above screenshot, our cert name is "ChilkatTest1".  You will use your cert name.
loJsonAzure.UpdateString("cert_name","CERT_NAME")
* In the above screenshot, our cert version is "63b94a23389546ecbc8eb6208a1bef37".  You will use your cert version.
loJsonAzure.UpdateString("cert_version","CERT_VERSION")
lnSuccess = loCert.SetCloudSigner(loJsonAzure)

loCrypt = CreateObject('Chilkat.Crypt2')

lnSuccess = loCrypt.SetSigningCert(loCert)
IF (lnSuccess = 0) THEN
    ? loCrypt.LastErrorText
    RELEASE loCert
    RELEASE loJsonAzure
    RELEASE loCrypt
    CANCEL
ENDIF

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

loCrypt.HashAlgorithm = "sha256"

loSignedAttrs = CreateObject('Chilkat.JsonObject')
loSignedAttrs.UpdateInt("contentType",1)
loSignedAttrs.UpdateInt("signingTime",1)
loSignedAttrs.UpdateInt("messageDigest",1)
loSignedAttrs.UpdateInt("signingCertificateV2",1)
loCrypt.SigningAttributes = loSignedAttrs.Emit()

* You can sign any type of file..
lcInputXmlPath = "qa_data/e-Invoice.xml"
lcOutputP7mPath = "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.
lnSuccess = loCrypt.CreateP7M(lcInputXmlPath,lcOutputP7mPath)
IF (lnSuccess = 0) THEN
    ? loCrypt.LastErrorText
    RELEASE loCert
    RELEASE loJsonAzure
    RELEASE loCrypt
    RELEASE loSignedAttrs
    CANCEL
ENDIF

? "Success."

RELEASE loCert
RELEASE loJsonAzure
RELEASE loCrypt
RELEASE loSignedAttrs