(PowerShell) Create PKCS1 RSA Signature with PEM Private Key

Demonstrates how to load a private key from a PEM file and create a PKCS1 RSA digital signature.

Download: Chilkat .NET Assemblies

[Reflection.Assembly]::LoadFile("C:\myAssemblies\ChilkatDotNet2.dll")

$pkey = New-Object Chilkat.PrivateKey

#  Load the private key from an RSA PEM file:
$pkey.LoadPemFile("pvkey2_rsa.pem")

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

$rsa = New-Object Chilkat.Rsa

#  Any string argument automatically begins the 30-day trial.
$success = $rsa.UnlockComponent("30-day trial")
if ($success -ne $true) {
    $("RSA component unlock failed")
    exit
}

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

#  This example will sign a string, and receive the signature
#  in a hex-encoded string.  Therefore, set the encoding mode
#  to "hex":
$rsa.EncodingMode = "hex"

#  If some other non-Chilkat software is going to verify
#  the signature, it is important to match the byte-ordering.
#  The LittleEndian property may be set to $true
#  for little-endian byte ordering,
#  or $false  for big-endian byte ordering.
#  Microsoft apps typically use little-endian, while
#  OpenSSL and other services (such as Amazon CloudFront)
#  use big-endian.
$rsa.LittleEndian = $false

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

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

$($hexSig)

$("Success!")