Sudo

1.0.2

Public/Restore-OriginalSystemConfig.ps1

# Just in case the PowerShell Session in which you originally created the SudoSession is killed/interrupted,
# you can use this function to revert WSMAN/Registry changes that were made with the New-SudoSession function.
# Example:
# Restore-OriginalSystemConfig -SudoSessionChangesLogFilePath "$HOME\SudoSession_04182018\SudoSession_Config_Changes_04182018_082747.xml"
function Restore-OriginalSystemConfig {
    [CmdletBinding(DefaultParameterSetName='Supply UserName and Password')]
    Param(
        [Parameter(Mandatory=$True)]
        [string]$SudoSessionChangesLogFilePath,

        [Parameter(
            Mandatory=$False,
            ParameterSetName='Supply UserName and Password'
        )]
        [string]$UserName = $([System.Security.Principal.WindowsIdentity]::GetCurrent().Name -split "\\")[-1],

        [Parameter(
            Mandatory=$False,
            ParameterSetName='Supply UserName and Password'
        )]
        [securestring]$Password,

        [Parameter(
            Mandatory=$False,
            ParameterSetName='Supply Credentials'
        )]
        [System.Management.Automation.PSCredential]$Credentials
    )

    ##### BEGIN Variable/Parameter Transforms and PreRun Prep #####

    # First, ingest SudoSessionChangesLogFilePath
    if (!$(Test-Path $SudoSessionChangesLogFilePath)) {
        Write-Error "The path $SudoSessionChangesLogFilePath was not found! Halting!"
        $global:FunctionResult = "1"
        return
    }
    else {
        $OriginalConfigInfo = Import-CliXML $SudoSessionChangesLogFilePath
    }

    $CurrentUser = $($(whoami) -split "\\")[-1]
    $SudoSessionFolder = "$HOME\SudoSession_$CurrentUser_$(Get-Date -Format MMddyyy)"
    if (!$(Test-Path $SudoSessionFolder)) {
        $SudoSessionFolder = $(New-Item -ItemType Directory -Path $SudoSessionFolder).FullName
    }
    $SudoSessionRevertChangesPSObject = "$SudoSessionFolder\SudoSession_Config_Revert_Changes__$CurrentUser_$(Get-Date -Format MMddyyy_hhmmss).xml"

    if (!$(GetElevation)) {
        if ($global:SudoCredentials) {
            if (!$Credentials) {
                if ($Username -match "\\") {
                    $UserName = $($UserName -split "\\")[-1]
                }
                if ($global:SudoCredentials.UserName -match "\\") {
                    $SudoUserName = $($global:SudoCredentials.UserName -split "\\")[-1]
                }
                else {
                    $SudoUserName = $global:SudoCredentials.UserName
                }
                if ($SudoUserName -match $UserName) {
                    $Credentials = $global:SudoCredentials
                }
            }
            else {
                if ($global:SudoCredentials.UserName -ne $Credentials.UserName) {
                    $global:SudoCredentials = $Credentials
                }
            }
        }
    
        if (!$Credentials) {
            if (!$Password) {
                $Password = Read-Host -Prompt "Please enter the password for $UserName" -AsSecureString
            }
            $Credentials = New-Object -TypeName System.Management.Automation.PSCredential -ArgumentList $UserName, $Password
        }
    
        if ($Credentials.UserName -match "\\") {
            $UserName = $($Credentials.UserName -split "\\")[-1]
        }
        if ($Username -match "\\") {
            $UserName = $($UserName -split "\\")[-1]
        }
    
        $global:SudoCredentials = $Credentials
    }
    
    ##### END Variable/Parameter Transforms and PreRun Prep #####

    ##### BEGIN Main Body #####

    if (GetElevation) {
        # Collect $Output as we go...
        $Output = [ordered]@{}

        if ($OriginalConfigInfo.WSMANServerCredSSPStateChange) {
            Set-Item -Path "WSMan:\localhost\Service\Auth\CredSSP" -Value false
            $Output.Add("CredSSPServer","Off")
        }
        if ($OriginalConfigInfo.WSMANClientCredSSPStateChange) {
            Set-Item -Path "WSMan:\localhost\Client\Auth\CredSSP" -Value false
            $Output.Add("CredSSPClient","Off")
        }
        if ($OriginalConfigInfo.WinRMStateChange) {
            if ([bool]$(Test-WSMan -ErrorAction SilentlyContinue)) {
                try {
                    Disable-PSRemoting -Force -ErrorAction Stop -WarningAction SilentlyContinue
                    $Output.Add("PSRemoting","Disabled")
                    Stop-Service winrm -ErrorAction Stop
                    $Output.Add("WinRMService","Stopped")
                    Set-Item "WSMan:\localhost\Service\AllowRemoteAccess" -Value false -ErrorAction Stop
                    $Output.Add("WSMANServerAllowRemoteAccess",$False)
                }
                catch {
                    Write-Error $_
                    if ($Output.Count -gt 0) {[pscustomobject]$Output}
                    $global:FunctionResult = "1"
                    return
                }
            }
        }

        if ($OriginalConfigInfo.RegistryKeyPropertiesCreated.Count -gt 0) {
            [System.Collections.ArrayList]$RegistryKeyPropertiesRemoved = @()

            foreach ($Property in $OriginalConfigInfo.RegistryKeyPropertiesCreated) {
                $PropertyName = $($Property | Get-Member -Type NoteProperty | Where-Object {$_.Name -notmatch "PSPath|PSParentPath|PSChildName|PSDrive|PSProvider"}).Name
                $PropertyPath = $Property.PSPath

                if (Test-Path $PropertyPath) {
                    Remove-ItemProperty -Path $PropertyPath -Name $PropertyName
                    $null = $RegistryKeyPropertiesRemoved.Add($Property)
                }
            }

            $Output.Add("RegistryKeyPropertiesRemoved",$RegistryKeyPropertiesRemoved)
        }

        if ($OriginalConfigInfo.RegistryKeysCreated.Count -gt 0) {
            [System.Collections.ArrayList]$RegistryKeysRemoved = @()

            foreach ($RegKey in $OriginalConfigInfo.RegistryKeysCreated) {
                $RegPath = $RegKey.PSPath

                if (Test-Path $RegPath) {
                    Remove-Item $RegPath -Recurse -Force
                    $null = $RegistryKeysRemoved.Add($RegKey)
                }
            }

            $Output.Add("RegistryKeysRemoved",$RegistryKeysRemoved)
        }

        if ($Output.Count -gt 0) {
            $Output.Add("RevertConfigChangesFilePath",$SudoSessionRevertChangesPSObject)

            [pscustomobject]$Output
            [pscustomobject]$Output | Export-CliXml $SudoSessionRevertChangesPSObject
        }
    }
    else {
        [System.Collections.ArrayList]$SystemConfigScript = @()

        $Line = '$Output = [ordered]@{}'
        $null = $SystemConfigScript.Add($Line)

        if ($OriginalConfigInfo.WSMANServerCredSSPStateChange) {
            $Line = 'Set-Item -Path "WSMan:\localhost\Service\Auth\CredSSP" -Value false'
            $null = $SystemConfigScript.Add($Line)
            $Line = '$Output.Add("CredSSPServer","Off")'
            $null = $SystemConfigScript.Add($Line)
        }
        if ($OriginalConfigInfo.WSMANClientCredSSPStateChange) {
            $Line = 'Set-Item -Path "WSMan:\localhost\Client\Auth\CredSSP" -Value false'
            $null = $SystemConfigScript.Add($Line)
            $Line = '$Output.Add("CredSSPClient","Off")'
            $null = $SystemConfigScript.Add($Line)
        }
        if ($OriginalConfigInfo.WinRMStateChange) {
            if ([bool]$(Test-WSMan -ErrorAction SilentlyContinue)) {
                $AdditionalLines = @(
                    'try {'
                    ' Disable-PSRemoting -Force -ErrorAction Stop -WarningAction SilentlyContinue'
                    ' $Output.Add("PSRemoting","Disabled")'
                    ' Stop-Service winrm -ErrorAction Stop'
                    ' $Output.Add("WinRMService","Stopped")'
                    ' Set-Item "WSMan:\localhost\Service\AllowRemoteAccess" -Value false -ErrorAction Stop'
                    ' $Output.Add("WSMANServerAllowRemoteAccess",$False)'
                    '}'
                    'catch {'
                    ' Write-Error $_'
                    ' if ($Output.Count -gt 0) {[pscustomobject]$Output}'
                    ' $global:FunctionResult = "1"'
                    ' return'
                    '}'
                )
                foreach ($AdditionalLine in $AdditionalLines) {
                    $null = $SystemConfigScript.Add($AdditionalLine)
                }
            }
        }

        if ($OriginalConfigInfo.RegistryKeyPropertiesCreated.Count -gt 0) {
            $Line = '[System.Collections.ArrayList]$RegistryKeyPropertiesRemoved = @()'
            $null = $SystemConfigScript.Add($Line)

            foreach ($Property in $OriginalConfigInfo.RegistryKeyPropertiesCreated) {
                $PropertyName = $($Property | Get-Member -Type NoteProperty | Where-Object {$_.Name -notmatch "PSPath|PSParentPath|PSChildName|PSDrive|PSProvider"}).Name
                $PropertyPath = $Property.PSPath

                if (Test-Path $PropertyPath) {
                    $Line = "if ([bool](Get-ItemProperty -Path '$PropertyPath' -Name '$PropertyName' -EA SilentlyContinue)) {`$null = `$RegistryKeyPropertiesRemoved.Add((Get-ItemProperty -Path '$PropertyPath' -Name '$PropertyName'))}"
                    $null = $SystemConfigScript.Add($Line)
                    $Line = "Remove-ItemProperty -Path '$PropertyPath' -Name '$PropertyName'"
                    $null = $SystemConfigScript.Add($Line)
                }
            }

            $Line = '$Output.Add("RegistryKeyPropertiesRemoved",$RegistryKeyPropertiesRemoved)'
            $null = $SystemConfigScript.Add($Line)
        }

        if ($OriginalConfigInfo.RegistryKeysCreated.Count -gt 0) {
            $Line = '[System.Collections.ArrayList]$RegistryKeysRemoved = @()'
            $null = $SystemConfigScript.Add($Line)

            foreach ($RegKey in $OriginalConfigInfo.RegistryKeysCreated) {
                $RegPath = $RegKey.PSPath

                if (Test-Path $RegPath) {
                    $Line = "if ([bool](Get-Item '$RegPath' -EA SilentlyContinue)) {`$null = `$RegistryKeysRemoved.Add((Get-Item '$RegPath'))}"
                    $null = $SystemConfigScript.Add($Line)
                    $Line = "Remove-Item '$RegPath' -Recurse -Force"
                    $null = $SystemConfigScript.Add($Line)
                }
            }

            $Line = '$Output.Add("RegistryKeysRemoved",$RegistryKeysRemoved)'
            $null = $SystemConfigScript.Add($Line)
        }

        $AdditionalLines = @(
            'if ($Output.Count -gt 0) {'
            " `$Output.Add('RevertConfigChangesFilePath','$SudoSessionRevertChangesPSObject')"
            " [pscustomobject]`$Output | Export-CliXml '$SudoSessionRevertChangesPSObject'"
            '}'
        )
        foreach ($AdditionalLine in $AdditionalLines) {
            $null = $SystemConfigScript.Add($AdditionalLine)
        }

        $SystemConfigScriptFilePath = "$SudoSessionFolder\SystemConfigScript.ps1"
        $SystemConfigScript | Set-Content $SystemConfigScriptFilePath

        # IMPORTANT NOTE: You CANNOT use the RunAs Verb if UseShellExecute is $false, and you CANNOT use
        # RedirectStandardError or RedirectStandardOutput if UseShellExecute is $true, so we have to write
        # output to a file temporarily
        $ProcessInfo = New-Object System.Diagnostics.ProcessStartInfo
        $ProcessInfo.FileName = "powershell.exe"
        $ProcessInfo.RedirectStandardError = $false
        $ProcessInfo.RedirectStandardOutput = $false
        $ProcessInfo.UseShellExecute = $true
        $ProcessInfo.Arguments = "-NoProfile -NonInteractive -WindowStyle Hidden -Command `"& $SystemConfigScriptFilePath`""
        $ProcessInfo.Verb = "RunAs"
        $Process = New-Object System.Diagnostics.Process
        $Process.StartInfo = $ProcessInfo
        $Process.Start() | Out-Null
        $Process.WaitForExit()
        
        $RevertChangesResult = Import-CliXML $SudoSessionRevertChangesPSObject
        $RevertChangesResult
    }

    ##### END Main Body #####
        
}
























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