(PowerShell) Write PKCS1 or PKCS8 Public Key PEM

Demonstrates how to write either PKCS1 or PKCS8 format PEM files. PKCS1 public keys have this PEM format:

-----BEGIN RSA PUBLIC KEY-----
BASE64 ENCODED DATA
-----END RSA PUBLIC KEY-----

-----BEGIN PUBLIC KEY-----
BASE64 ENCODED DATA
-----END PUBLIC KEY-----

Chilkat .NET Downloads Chilkat .NET Assemblies

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

# Unlock the Chilkat API.
# Starting in v9.5.0.49, all Chilkat classes can be unlocked at once at the beginning of a program
# by calling UnlockBundle.  It requires a Bundle unlock code.
$chilkatGlob = New-Object Chilkat.Global
$success = $chilkatGlob.UnlockBundle("Anything for 30-day trial.")
if ($success -ne $true) {
    $($chilkatGlob.LastErrorText)
    exit
}

$pem = New-Object Chilkat.Pem

# Load a public key from a PEM file.
# (Assume the PEM contains at least one public key..)
$success = $pem.LoadPemFile("/Users/chilkat/testData/pem/myPublicKey.pem")
if ($success -ne $true) {
    $($pem.LastErrorText)
    exit
}

$numPublicKeys = $pem.NumPublicKeys
if ($numPublicKeys -eq 0) {
    $(("Error: Expected the PEM to contain public keys."))
    exit
}

# Get each public key as PEM, first in PKCS1 format, then in PKCS8.
for ($i = 1; $i -le $numPublicKeys; $i++) {

    # First output to PKCS1 PEM format:
    $("This is PKCS1 format:")
    $pem.PublicKeyFormat = "pkcs1"
    $($pem.ToPem())

    # Now PKCS8 PEM format:
    $("This is PKCS8 format:")
    $pem.PublicKeyFormat = "pkcs8"
    $($pem.ToPem())

}