APS

2.10.72

Modules/ScriptsSigner/scriptssigner.psm1

                                <#

.SYNOPSIS

Adds an Authenticode signature to a PowerShell script or other file.

.DESCRIPTION

The ``Add-Signature`` cmdlet adds an Authenticode signature to the specified file using the installed local certificate. If no certificate is installed, the user is asked if he wants to create a new local certificate. In a PowerShell script file, the signature takes the form of a block of text that indicates the end of the instructions that are executed in the script. If there is a signature in the file when this cmdlet runs, that signature is removed.

.PARAMETER File

Specifies the file to be signed. If a directory is selected, all scripts in it and in subdirectories will be signed.

.EXAMPLE

Add-Signature -File ".\scriptToSign.ps1"

#>

function Add-Signature{

    [CmdletBinding(HelpUri="https://github.com/akotu235/APS/blob/master/Docs/Modules/ScriptsSigner/Add-Signature.md")]

    param(

        [Parameter(Mandatory=$true)]

        [System.String]$File

    )

    if(@(Get-ChildItem cert:\CurrentUser\My -codesigning).Length -gt 0){

        if((Get-ChildItem cert:\CurrentUser\My -codesigning).Length -eq 1){

            $Cert = (Get-ChildItem cert:\CurrentUser\My -CodeSigningCert)[0]

        }

        else{

            Add-Type -AssemblyName System.Windows.Forms

            Add-Type -AssemblyName System.Drawing

            $form = New-Object System.Windows.Forms.Form

            $form.Text = 'Select a Certificate'

            $form.Size = New-Object System.Drawing.Size(300,200)

            $form.StartPosition = 'CenterScreen'

            $okButton = New-Object System.Windows.Forms.Button

            $okButton.Location = New-Object System.Drawing.Point(75,120)

            $okButton.Size = New-Object System.Drawing.Size(75,23)

            $okButton.Text = 'OK'

            $okButton.DialogResult = [System.Windows.Forms.DialogResult]::OK

            $form.AcceptButton = $okButton

            $form.Controls.Add($okButton)

            $cancelButton = New-Object System.Windows.Forms.Button

            $cancelButton.Location = New-Object System.Drawing.Point(150,120)

            $cancelButton.Size = New-Object System.Drawing.Size(75,23)

            $cancelButton.Text = 'Cancel'

            $cancelButton.DialogResult = [System.Windows.Forms.DialogResult]::Cancel

            $form.CancelButton = $cancelButton

            $form.Controls.Add($cancelButton)

            $label = New-Object System.Windows.Forms.Label

            $label.Location = New-Object System.Drawing.Point(10,20)

            $label.Size = New-Object System.Drawing.Size(280,20)

            $label.Text = 'Please select Certificate:'

            $form.Controls.Add($label)

            $listBox = New-Object System.Windows.Forms.ListBox

            $listBox.Location = New-Object System.Drawing.Point(10,40)

            $listBox.Size = New-Object System.Drawing.Size(260,20)

            $listBox.Height = 80

            $Certs = @(Get-ChildItem cert:\CurrentUser\My -codesigning)

            foreach($Cert in $Certs){

                [void] $listBox.Items.Add($Cert.Subject.ToString())

            }

            $form.Controls.Add($listBox)

            $form.Topmost = $true

            $result = $form.ShowDialog()

            if($result -eq [System.Windows.Forms.DialogResult]::OK){

                $Cert=(Get-ChildItem cert:\CurrentUser\My -codesigning | Where-Object Subject -like "*$($listBox.SelectedItem)*")

            }

        }

    }

    else{

        Write-Warning no certificate.

        $ans = Read-Host -Prompt "Do you want to create a new certificate?(y/n)"

        if($ans.ToLower() -like "y*"){

            New-CodeSigningCert

        }

    }

    if((Get-ItemProperty $File).Mode -like "d-*" ){

        $Files = Get-ChildItem -Path $File -Recurse | Where-Object -Property Extension -Match ".psm?1"

        foreach ($f in $Files){

            Remove-Signature $f.FullName

            Set-AuthenticodeSignature $f.FullName $Cert

        }

    }

    else{

        Remove-Signature $File

        Set-AuthenticodeSignature $File $Cert

    }

}

<#

.SYNOPSIS

Removes the script signature.

.DESCRIPTION

If the indicated file has a signature block it will be removed.

.PARAMETER File

Specifies the file to remove the signature.

.EXAMPLE

.\Remove-Signature.ps1 -File .\scriptNmae.ps1

#>

function Remove-Signature{

    [CmdletBinding(SupportsShouldProcess, HelpUri="https://github.com/akotu235/APS/blob/master/Docs/Modules/ScriptsSigner/Remove-Signature.md")]

    param(

        [Parameter(Mandatory=$true)]

        [System.String]$File

    )

    if((Get-Content $File).Contains("# SIG # Begin signature block")){

        try{

            $FileContent = Get-Content $File

            $FileContent[0..(((Get-Content $File | Select-String "SIG # Begin signature block").LineNumber)-2)] | Set-Content $File

        }

        catch{

            Write-Information "Signature was not removed from $File"

        }

    }

    $content = Get-Content $File

    for($line = $content.Length; $line -ge 0; $line--){

        if($content[$line] -eq "" -or $null -eq $content[$line]){

            if($content[$line] -eq ""){

                $content[$line] = $null

            }

        }

        else{

            break

        }

    }

    Set-Content -Value $content -Path $File

}

############

# SIG # Begin signature block

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# gjcCAQSgWzBZMDQGCisGAQQBgjcCAR4wJgIDAQAABBAfzDtgWUsITrck0sYpfvNR

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# SIG # End signature block