PowerShell

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.

PowerShell

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

# 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 AWS KMS
# However, we still need the certificate locally (without private key).
$cert = New-Object Chilkat.Cert
$success = $cert.LoadFromFile("qa_data/certs/myCert.cer")
if ($success -eq $false) {
    $($cert.LastErrorText)
    exit
}

# Here's a screenshot showing the key ID of a private key in AWS KMS:
# (image:https://example-code.com/images/aws_kms.jpg/endImage)

# 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.
$jsonAwsKms = New-Object Chilkat.JsonObject
# Set the "service" equal to "aws_kms" to tell Chilkat to use AWS KMS for signing.
$jsonAwsKms.UpdateString("service","aws_kms")
$jsonAwsKms.UpdateString("access_key","ACCESS_KEY")
$jsonAwsKms.UpdateString("secret_key","SECRET_KEY")
# Make sure to specify the correct region for your case.
$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.
$jsonAwsKms.UpdateString("key_id","187012e8-008f-4fc7-b100-5efe6146dff2")

$success = $cert.SetCloudSigner($jsonAwsKms)

$crypt = New-Object Chilkat.Crypt2

$success = $crypt.SetSigningCert($cert)
if ($success -eq $false) {
    $($crypt.LastErrorText)
    exit
}

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

$crypt.HashAlgorithm = "sha256"

$signedAttrs = New-Object Chilkat.JsonObject
$signedAttrs.UpdateInt("contentType",1)
$signedAttrs.UpdateInt("signingTime",1)
$signedAttrs.UpdateInt("messageDigest",1)
$signedAttrs.UpdateInt("signingCertificateV2",1)
$crypt.SigningAttributes = $signedAttrs.Emit()

# You can sign any type of file..
$inputXmlPath = "qa_data/e-Invoice.xml"
$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.
$success = $crypt.CreateP7M($inputXmlPath,$outputP7mPath)
if ($success -eq $false) {
    $($crypt.LastErrorText)
    exit
}

$("Success.")