(PowerShell) RSASSA-PSS Algorithm with SHA256 Hashing

RSA encrypt a SHA256 hash with OAEP padding.

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

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

$privkey = New-Object Chilkat.PrivateKey

# Load the private key object from a PEM file.
# (To load from a PEM string, call LoadPem instead.)
$success = $privkey.LoadPemFile("somePath/myPrivateKey.pem")
if ($success -ne $true) {
    $($privkey.LastErrorText)
    exit
}

$rsa = New-Object Chilkat.Rsa
# Use RSA-PSS by setting OaepPadding = $true
$rsa.OaepPadding = $true
# Use SHA256
$rsa.OaepHash = "SHA-256"

$rsa.ImportPrivateKeyObj($privkey)

# Generate a base64 signature.
$rsa.EncodingMode = "base64"

$sigStr = $rsa.SignStringENC("String to be signed","SHA-256")
if ($rsa.LastMethodSuccess -ne $true) {
    $($rsa.LastErrorText)
    exit
}

$("Signature: " + $sigStr)