(PowerShell) RSA Sign an Encoded Hash

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Chilkat .NET Downloads Chilkat .NET Assemblies

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

# Assuming the smartcard/USB token is installed with the correct drivers from the manufacturer,
# this code can work on multiple platforms including Windows, MacOS, Linux, and iOS.

# Chilkat automatically detects and determines the way in which the HSM is used,
# which can be by PKCS11, Apple Keychain, Microsoft CNG / Crypto API, or ScMinidriver.

$cert = New-Object Chilkat.Cert

# Set the token/smartcard PIN prior to loading.
$cert.SmartCardPin = "123456"

# Specify the certificate by its common name.
$success = $cert.LoadFromSmartcard("cn=chilkat-rsa-2048")
if ($success -eq $false) {
    $($cert.LastErrorText)
    exit
}

$("Signing with the private key for this cert: " + $cert.SubjectCN)

# Create data to be hashed and signed.
$bd = New-Object Chilkat.BinData

for ($i = 0; $i -le 100; $i++) {
    $bd.AppendEncoded("000102030405060708090A0B0C0D0E0F","hex")
}

$rsa = New-Object Chilkat.Rsa

# Use the certificate's private key for signing.
$success = $rsa.SetX509Cert($cert,$true)
if ($success -eq $false) {
    $($rsa.LastErrorText)
    exit
}

# We'll first compute the hash and then pass the encoded hash to be signed.
$sha256_base64 = $bd.GetHash("sha256","base64")
$("sha256 hash in base64 format: " + $sha256_base64)

# Pass in the base64 hash and return a base64 signature.
$rsa.EncodingMode = "base64"
$rsaSig_base64 = $rsa.SignHashENC($sha256_base64,"sha256")
if ($success -eq $false) {
    $($rsa.LastErrorText)
    exit
}

$("RSA signature as base64: " + $rsaSig_base64)