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Renamed folder Scripts to scripts
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131
scripts/encrypt-file.ps1
Executable file
131
scripts/encrypt-file.ps1
Executable file
@ -0,0 +1,131 @@
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<#
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.SYNOPSIS
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Encrypts a file
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.DESCRIPTION
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This PowerShell script encrypts a file using the given password and AES encryption.
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.PARAMETER Path
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Specifies the path to the file to encrypt
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.PARAMETER Password
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Specifies the password to use
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.EXAMPLE
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PS> ./encrypt-file.ps1 C:\MyFile.txt "123"
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.LINK
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https://github.com/fleschutz/PowerShell
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.NOTES
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Author: Markus Fleschutz | License: CC0
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#>
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param([string]$Path = "", [string]$Password = "")
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function EncryptFile {
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[CmdletBinding(DefaultParameterSetName='SecureString')]
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[OutputType([System.IO.FileInfo[]])]
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Param(
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[Parameter(Mandatory=$true, Position=1, ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true)]
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[Alias('PSPath','LiteralPath')]
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[string[]]$FileName,
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[Parameter(Mandatory=$false, Position=2)]
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[ValidateSet('AES','DES','RC2','Rijndael','TripleDES')]
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[String]$Algorithm = 'AES',
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[Parameter(Mandatory=$false, Position=3, ParameterSetName='SecureString')]
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[System.Security.SecureString]$Key = (New-CryptographyKey -Algorithm $Algorithm),
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[Parameter(Mandatory=$true, Position=3, ParameterSetName='PlainText')]
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[String]$KeyAsPlainText,
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[Parameter(Mandatory=$false, Position=4)]
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[System.Security.Cryptography.CipherMode]$CipherMode,
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[Parameter(Mandatory=$false, Position=5)]
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[System.Security.Cryptography.PaddingMode]$PaddingMode,
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[Parameter(Mandatory=$false, Position=6)]
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[String]$Suffix = ".$Algorithm",
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[Parameter()]
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[Switch]$RemoveSource
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)
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begin {
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try {
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if ($PSCmdlet.ParameterSetName -eq 'PlainText') {
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$Key = $KeyAsPlainText | ConvertTo-SecureString -AsPlainText -Force
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}
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$BSTR = [System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($Key)
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$EncryptionKey = [System.Convert]::FromBase64String([System.Runtime.InteropServices.Marshal]::PtrToStringAuto($BSTR))
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$Crypto = [System.Security.Cryptography.SymmetricAlgorithm]::Create($Algorithm)
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if ($PSBoundParameters.ContainsKey('CipherMode')) {
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$Crypto.Mode = $CipherMode
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}
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if ($PSBoundParameters.ContainsKey('PaddingMode')) {
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$Crypto.Padding = $PaddingMode
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}
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$Crypto.KeySize = $EncryptionKey.Length*8
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$Crypto.Key = $EncryptionKey
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} catch {
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Write-Error $_ -ErrorAction Stop
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}
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}
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process {
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$Files = Get-Item -LiteralPath $FileName
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foreach($File in $Files) {
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$DestinationFile = $File.FullName + $Suffix
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try {
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$FileStreamReader = New-Object System.IO.FileStream($File.FullName, [System.IO.FileMode]::Open)
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$FileStreamWriter = New-Object System.IO.FileStream($DestinationFile, [System.IO.FileMode]::Create)
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$Crypto.GenerateIV()
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$FileStreamWriter.Write([System.BitConverter]::GetBytes($Crypto.IV.Length), 0, 4)
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$FileStreamWriter.Write($Crypto.IV, 0, $Crypto.IV.Length)
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$Transform = $Crypto.CreateEncryptor()
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$CryptoStream = New-Object System.Security.Cryptography.CryptoStream($FileStreamWriter, $Transform, [System.Security.Cryptography.CryptoStreamMode]::Write)
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$FileStreamReader.CopyTo($CryptoStream)
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$CryptoStream.FlushFinalBlock()
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$CryptoStream.Close()
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$FileStreamReader.Close()
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$FileStreamWriter.Close()
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if ($RemoveSource) {
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Remove-Item -LiteralPath $File.FullName
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}
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$result = Get-Item $DestinationFile
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$result | Add-Member –MemberType NoteProperty –Name SourceFile –Value $File.FullName
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$result | Add-Member –MemberType NoteProperty –Name Algorithm –Value $Algorithm
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$result | Add-Member –MemberType NoteProperty –Name Key –Value $Key
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$result | Add-Member –MemberType NoteProperty –Name CipherMode –Value $Crypto.Mode
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$result | Add-Member –MemberType NoteProperty –Name PaddingMode –Value $Crypto.Padding
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$result
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} catch {
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Write-Error $_
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if ($FileStreamWriter) {
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$FileStreamWriter.Close()
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Remove-Item -LiteralPath $DestinationFile -Force
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}
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continue
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} finally {
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if($CryptoStream){$CryptoStream.Close()}
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if($FileStreamReader){$FileStreamReader.Close()}
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if($FileStreamWriter){$FileStreamWriter.Close()}
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}
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}
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}
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}
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try {
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if ($Path -eq "" ) { $Path = read-host "Enter path to file" }
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if ($Password -eq "" ) { $Password = read-host "Enter password" }
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$StopWatch = [system.diagnostics.stopwatch]::startNew()
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[char[]]$PasswordAsArray = $Password
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$PasswordAsBase64 = [System.Convert]::ToBase64String($PasswordAsArray)
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EncryptFile "$Path" -Algorithm AES -KeyAsPlainText $PasswordAsBase64 -RemoveSource
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[int]$Elapsed = $StopWatch.Elapsed.TotalSeconds
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"✔️ file encrypted in $Elapsed sec"
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exit 0 # success
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} catch {
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"⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
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exit 1
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}
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