PowerShell

Sign String to create a CAdES-T Signature

See more CAdES Examples

This example will sign a string to create a CAdEST-T signature.

Note: This example requires Chilkat v9.5.0.78 or greater.

PowerShell

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

$success = $false

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

$crypt = New-Object Chilkat.Crypt2

# This example will use the certificate + private key currently inserted into a smartcard reader.
$cert = New-Object Chilkat.Cert

# If we wish to provide the smartcard PIN (otherwise the user will be prompted by the operating system).
$cert.SmartCardPin = "000000"
$success = $cert.LoadFromSmartcard("")
if ($success -ne $true) {
    $($cert.LastErrorText)
    exit
}

# Note: It is also possible to use certs from .pfx/.p12, .pem, or other sources such as 
# pre-installed Windows certificates.

$success = $crypt.SetSigningCert($cert)

# Use SHA-256 rather than the default of SHA-1
$crypt.HashAlgorithm = "sha256"

# Create JSON that tells Chilkat what signing attributes to include:
$attrs = New-Object Chilkat.JsonObject
$attrs.UpdateBool("contentType",$true)
$attrs.UpdateBool("signingTime",$true)
$attrs.UpdateBool("messageDigest",$true)
$attrs.UpdateBool("signingCertificateV2",$true)

# A CAdES-T signature is one that includes a timestampToken created by an online TSA (time stamping authority).
# We must include the TSA's URL, as well as a few options to indicate what is desired.
# Except for the TSA URL, the options shown here are typically what you would need.
$attrs.UpdateBool("timestampToken.enabled",$true)
$attrs.UpdateString("timestampToken.tsaUrl","https://freetsa.org/tsr")
$attrs.UpdateBool("timestampToken.addNonce",$false)
$attrs.UpdateBool("timestampToken.requestTsaCert",$true)
$attrs.UpdateString("timestampToken.hashAlg","sha256")

$crypt.SigningAttributes = $attrs.Emit()

$strToSign = "THIS IS MY ID"

$bd = New-Object Chilkat.BinData
$bd.AppendString($strToSign,"utf-8")

# This creates the CAdES-T signature.  During the signature creation, it
# communicates with the TSA to get a timestampToken.
# The contents of bd are signed and replaced with the CAdES-T signature (which embeds the original content).
$success = $crypt.OpaqueSignBd($bd)
if ($success -ne $true) {
    $($crypt.LastErrorText)
    exit
}

# Get the signature in base64 format:
$($bd.GetEncoded("base64_mime"))

# Or save the signature to a file.
$bd.WriteFile("qa_output/cades-t_sample.p7m")

$("Success.")