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# Copyright (c) 2017 Ansible Project
# Simplified BSD License (see licenses/simplified_bsd.txt or https://opensource.org/licenses/BSD-2-Clause)
Function Convert-FromSID($sid) {
# Converts a SID to a Down-Level Logon name in the form of DOMAIN\UserName
# If the SID is for a local user or group then DOMAIN would be the server
# name.
$account_object = New-Object System.Security.Principal.SecurityIdentifier($sid)
try {
$nt_account = $account_object.Translate([System.Security.Principal.NTAccount])
}
catch {
Fail-Json -obj @{} -message "failed to convert sid '$sid' to a logon name: $($_.Exception.Message)"
}
return $nt_account.Value
}
Function Convert-ToSID {
[Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSAvoidUsingEmptyCatchBlock", "",
Justification = "We don't care if converting to a SID fails, just that it failed or not")]
param($account_name)
# Converts an account name to a SID, it can take in the following forms
# SID: Will just return the SID value that was passed in
# UPN:
# principal@domain (Domain users only)
# Down-Level Login Name
# DOMAIN\principal (Domain)
# SERVERNAME\principal (Local)
# .\principal (Local)
# NT AUTHORITY\SYSTEM (Local Service Accounts)
# Login Name
# principal (Local/Local Service Accounts)
try {
$sid = New-Object -TypeName System.Security.Principal.SecurityIdentifier -ArgumentList $account_name
return $sid.Value
}
catch {}
if ($account_name -like "*\*") {
$account_name_split = $account_name -split "\\"
if ($account_name_split[0] -eq ".") {
$domain = $env:COMPUTERNAME
}
else {
$domain = $account_name_split[0]
}
$username = $account_name_split[1]
}
else {
$domain = $null
$username = $account_name
}
if ($domain) {
# searching for a local group with the servername prefixed will fail,
# need to check for this situation and only use NTAccount(String)
if ($domain -eq $env:COMPUTERNAME) {
$adsi = [ADSI]("WinNT://$env:COMPUTERNAME,computer")
$group = $adsi.psbase.children | Where-Object { $_.schemaClassName -eq "group" -and $_.Name -eq $username }
}
else {
$group = $null
}
if ($group) {
$account = New-Object System.Security.Principal.NTAccount($username)
}
else {
$account = New-Object System.Security.Principal.NTAccount($domain, $username)
}
}
else {
# when in a domain NTAccount(String) will favour domain lookups check
# if username is a local user and explicitly search on the localhost for
# that account
$adsi = [ADSI]("WinNT://$env:COMPUTERNAME,computer")
$user = $adsi.psbase.children | Where-Object { $_.schemaClassName -eq "user" -and $_.Name -eq $username }
if ($user) {
$account = New-Object System.Security.Principal.NTAccount($env:COMPUTERNAME, $username)
}
else {
$account = New-Object System.Security.Principal.NTAccount($username)
}
}
try {
$account_sid = $account.Translate([System.Security.Principal.SecurityIdentifier])
}
catch {
Fail-Json @{} "account_name $account_name is not a valid account, cannot get SID: $($_.Exception.Message)"
}
return $account_sid.Value
}
# this line must stay at the bottom to ensure all defined module parts are exported
Export-ModuleMember -Alias * -Function * -Cmdlet *
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