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Powershell/PowerShell-collection/Misc/Remove-Signature.ps1
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188
Powershell/PowerShell-collection/Misc/Remove-Signature.ps1
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function Remove-Signature
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{
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<#
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.SYNOPSIS
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Finds all signed PowerShell files removes any digital signatures attached to them.
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.DESCRIPTION
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Finds all signed PowerShell files removes any digital signatures attached to them.
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Supported Filetypes are: psm1, ps1, psd1, and ps1xml - All other Files are ignored!
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.PARAMETER Path
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Single File or Path you want to parse for digital signatures. (Mandatory)
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.PARAMETER Recurse
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Recurse through all subdirectories of the path provided. The default is not work recursively (Optional)
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.EXAMPLE
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PS C:\> Remove-Signature -Path 'C:\Temp\Export-DistributionGroup2Cloud.ps1'
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Removes all digital signatures from 'C:\Temp\Export-DistributionGroup2Cloud.ps1'
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.EXAMPLE
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PS C:\> Remove-Signature -Path 'C:\Temp' -Recurse
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Removes all digital signatures from psm1, ps1, psd1, and ps1xml files found in 'C:\Temp' and below (recursively).
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.NOTES
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Based on the ideas and work of the original Authors: Adrian Rodriguez and Zachary Loeber
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.LINK
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http://www.the-little-things.net
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.LINK
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https://psrdrgz.github.io/RemoveAuthenticodeSignature/
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#>
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[CmdletBinding(ConfirmImpact = 'Low',
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SupportsShouldProcess)]
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param
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(
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[Parameter(Mandatory,
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ValueFromPipeline,
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ValueFromPipelineByPropertyName,
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Position = 1,
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HelpMessage = 'Single File or Path you want to parse for digital signatures.')]
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[ValidateNotNullOrEmpty()]
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[Alias('FilePath')]
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[string]
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$Path,
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[Parameter(ValueFromPipeline,
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ValueFromPipelineByPropertyName,
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Position = 2)]
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[switch]
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$Recurse = $false
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)
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begin
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{
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$paramGetChildItem = @{
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Path = $Path
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File = $true
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Include = '*.psm1', '*.ps1', '*.psd1', '*.ps1xml'
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}
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if ($Recurse)
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{
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Write-Verbose -Message 'Work recursively'
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$paramGetChildItem.Recurse = $true
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}
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}
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process
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{
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$FilesToProcess = (Get-ChildItem @paramGetChildItem)
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$FilesToProcess | ForEach-Object -Process {
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$SignatureStatus = (Get-AuthenticodeSignature -FilePath $_).Status
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$ScriptFileFullName = $_.FullName
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if ($SignatureStatus -ne 'NotSigned')
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{
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try
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{
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$paramGetContent = @{
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Path = $ScriptFileFullName
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ErrorAction = 'Stop'
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WarningAction = 'Continue'
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}
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$Content = (Get-Content @paramGetContent)
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$paramNewObject = @{
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TypeName = 'System.Text.StringBuilder'
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ErrorAction = 'Stop'
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WarningAction = 'Continue'
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}
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$StringBuilder = (New-Object @paramNewObject)
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foreach ($Line in $Content)
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{
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if ($Line -match '^# SIG # Begin signature block|^<!-- SIG # Begin signature block -->')
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{
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break
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}
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else
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{
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$null = $StringBuilder.AppendLine($Line)
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}
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}
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if ($pscmdlet.ShouldProcess("$ScriptFileFullName"))
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{
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$paramSetContent = @{
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Path = $ScriptFileFullName
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Value = $StringBuilder.ToString()
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Force = $true
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Confirm = $false
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Encoding = 'UTF8'
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ErrorAction = 'Stop'
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WarningAction = 'Continue'
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}
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$null = (Set-Content @paramSetContent)
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Write-Verbose -Message ('Removed signature from {0}' -f $ScriptFileFullName)
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}
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}
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catch
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{
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# Get error record
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[Management.Automation.ErrorRecord]$e = $_
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# Retrieve information about runtime error
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$info = [PSCustomObject]@{
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Exception = $e.Exception.Message
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Reason = $e.CategoryInfo.Reason
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Target = $e.CategoryInfo.TargetName
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Script = $e.InvocationInfo.ScriptName
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Line = $e.InvocationInfo.ScriptLineNumber
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Column = $e.InvocationInfo.OffsetInLine
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}
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# Output information. Post-process collected info, and log info (optional)
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$info | Out-String | Write-Verbose
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Write-Error -Message ($info.Exception) -TargetObject ($info.Target) -ErrorAction Stop
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break
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}
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}
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else
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{
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Write-Verbose -Message ('No signature found in {0}' -f $ScriptFileFullName)
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}
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}
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}
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end
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{
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Write-Verbose -Message 'Remove-Signature Done'
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}
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}
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#region LICENSE
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<#
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BSD 3-Clause License
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Copyright (c) 2021, enabling Technology
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#>
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#endregion LICENSE
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#region DISCLAIMER
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<#
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DISCLAIMER:
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- Use at your own risk, etc.
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- This is open-source software, if you find an issue try to fix it yourself. There is no support and/or warranty in any kind
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- This is a third-party Software
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- The developer of this Software is NOT sponsored by or affiliated with Microsoft Corp (MSFT) or any of its subsidiaries in any way
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- The Software is not supported by Microsoft Corp (MSFT)
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- By using the Software, you agree to the License, Terms, and any Conditions declared and described above
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- If you disagree with any of the terms, and any conditions declared: Just delete it and build your own solution
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#>
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#endregion DISCLAIMER
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