(PowerShell) RSA Sign with PKCS8 Encrypted Key

See more RSA Examples

Demonstrates how to load a private key from an encrypted PKCS8 file and create an RSA digital signature.

Chilkat .NET Downloads Chilkat .NET Assemblies

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

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

$pkey = New-Object Chilkat.PrivateKey

# Load the private key from an RSA PEM file:
$success = $pkey.LoadPkcs8EncryptedFile("privateKey.key","myPassword")

# Get the private key in XML format:
$pkeyXml = $pkey.GetXml()

$rsa = New-Object Chilkat.Rsa

# Import the private key into the RSA object:
$success = $rsa.ImportPrivateKey($pkeyXml)
if ($success -ne $true) {
    $($rsa.LastErrorText)
    exit
}

# Return the signature in hex
$rsa.EncodingMode = "hex"

$strData = "This is the string to be signed."

# Sign the string using the sha-1 hash algorithm.
# Other valid choices are "md2", "sha256", "sha384", "sha512",  and "md5".
$hexSig = $rsa.SignStringENC($strData,"sha-1")

$($hexSig)