Private/Get-PublicKeyBytesEncodedString.ps1
|
function Get-PublicKeyBytesEncodedString { <# .SYNOPSIS Returns the public key byte array encoded as a Base64 string, of the certificate where the thumbprint passed as parameter input is a match. .DESCRIPTION Returns the public key byte array encoded as a Base64 string, of the certificate where the thumbprint passed as parameter input is a match. The certificate used must be available in the LocalMachine\My certificate store. .PARAMETER Thumbprint Specify the thumbprint of the certificate. .NOTES Author: Nickolaj Andersen / Thomas Kurth Contact: @NickolajA Created: 2021-06-07 Updated: 2021-06-07 Version history: 1.0.0 - (2021-06-07) Function created Credits to Thomas Kurth for sharing his original C# code. #> param( [parameter(Mandatory = $true, HelpMessage = "Specify the thumbprint of the certificate.")] [ValidateNotNullOrEmpty()] [string]$Thumbprint ) Process { # Determine the certificate based on thumbprint input $Certificate = Get-ChildItem -Path "Cert:\LocalMachine\My" -Recurse | Where-Object { $PSItem.Thumbprint -eq $Thumbprint } if ($Certificate -ne $null) { # Get the public key bytes [byte[]]$PublicKeyBytes = $Certificate.GetPublicKey() # Handle return value return [System.Convert]::ToBase64String($PublicKeyBytes) } } } |