PowerShell

Load a Public Key from Base64 DER

Demonstrates the Chilkat PublicKey.LoadBase64 method, which loads a public key from standard Base64-encoded DER. The only argument is the Base64 string; whitespace within it is permitted.

Background: A public key in DER (binary) form is often carried as Base64 text so it can travel through channels that expect a string — a config value, a JSON field, a certificate export. This loader decodes that text and inspects the DER to determine the key type and structure automatically. It is the plain-Base64 counterpart to loading a full PEM block, which additionally has the BEGIN/END armor.

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

$success = $false

#  Demonstrates the PublicKey.LoadBase64 method, which loads a public key from standard
#  Base64-encoded DER.  The only argument is the Base64 string (whitespace is allowed).

$pubKey = New-Object Chilkat.PublicKey

#  The Base64 of the DER-encoded public key.
$keyStr = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA...IDAQAB"

$success = $pubKey.LoadBase64($keyStr)
if ($success -eq $false) {
    $($pubKey.LastErrorText)
    exit
}

$("Loaded a " + $pubKey.KeyType + " public key.")