Generating a shared access signature token using Powershell

shared-access-signature-token.ps1

$URI="https://{{service-bus-name-here}}.servicebus.windows.net/{{queue-name-here}}"
$Access_Policy_Name="{{access-policy-name-here}}"
$Access_Policy_Key="{{access-policy-key-here}}"
$Expires=([DateTimeOffset]::Now.ToUnixTimeSeconds())+7568640
$SignatureString=[System.Web.HttpUtility]::UrlEncode($URI)+ "`n" + [string]$Expires
$HMAC = New-Object System.Security.Cryptography.HMACSHA256
$HMAC.key = [Text.Encoding]::ASCII.GetBytes($Access_Policy_Key)
$Signature = $HMAC.ComputeHash([Text.Encoding]::ASCII.GetBytes($SignatureString))
$Signature = [Convert]::ToBase64String($Signature)
$SASToken = "SharedAccessSignature sr=" + [System.Web.HttpUtility]::UrlEncode($URI) + "&sig=" + [System.Web.HttpUtility]::UrlEncode($Signature) + "&se=" + $Expires + "&skn=" + $Access_Policy_Name
$SASToken