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Updated both files
This commit is contained in:
Markus Fleschutz
parent
7641b29e7c
commit
b1abddf94f
@ -8,9 +8,8 @@
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param([string]$Path = "", [string]$Password = "")
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Set-StrictMode -Version Latest
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Function Unprotect-File
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function DecryptFile
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{
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<#
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.SYNOPSIS
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@ -42,22 +41,6 @@ Removes the source (encrypted) file after decrypting.
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.OUTPUTS
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System.IO.FileInfo. Unprotect-File will return FileInfo with the SourceFile as an added NoteProperty
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.EXAMPLE
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Unprotect-File 'C:\secrets.txt.AES' $key
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This example decrypts C:\secrets.txt.AES using the key stored in the variable $key. The decrypted file would remove the default extension of '.AES' and the source (encrypted) file would not be removed.
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.EXAMPLE
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Unprotect-File 'C:\secrets.txt.Encrypted' -Algorithm DES -Key $key -Suffix '.Encrypted' -RemoveSource
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This example decrypts C:\secrets.txt.Encrypted using DES and the key stored in the variable $key. The decrypted file would remove the extension of '.Encrypted' and the source (encrypted) file would be removed.
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.EXAMPLE
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Get-ChildItem 'C:\Files' -Recurse | Unprotect-File -Algorithm AES -Key $key -RemoveSource
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This example decrypts all of the files under the C:\Files directory using the key stored in the variable $key. The decrypted files would remove the default extension of '.AES' and the source (encrypted) files would be removed.
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.NOTES
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Author: Tyler Siegrist
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Date: 9/22/2017
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#>
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[CmdletBinding(DefaultParameterSetName='SecureString')]
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[OutputType([System.IO.FileInfo[]])]
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@ -77,13 +60,12 @@ Param(
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[Parameter(Mandatory=$false, Position=5, ValueFromPipelineByPropertyName=$true)]
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[System.Security.Cryptography.PaddingMode]$PaddingMode = 'PKCS7',
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[Parameter(Mandatory=$false, Position=6)]
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[String]$Suffix, #Assigning default value in code due to it not processing ".$Algorithm" properly when Algorithm is ValueFromPipelineByPropertyName
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[String]$Suffix,
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[Parameter()]
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[Switch]$RemoveSource
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)
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Process
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{
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#Configure cryptography
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try
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{
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if($PSCmdlet.ParameterSetName -eq 'PlainText')
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@ -91,7 +73,6 @@ Param(
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$Key = $KeyAsPlainText | ConvertTo-SecureString -AsPlainText -Force
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}
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#Decrypt cryptography Key from SecureString
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$BSTR = [System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($Key)
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$EncryptionKey = [System.Convert]::FromBase64String([System.Runtime.InteropServices.Marshal]::PtrToStringAuto($BSTR))
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@ -111,12 +92,10 @@ Param(
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$Suffix = ".$Algorithm"
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}
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#Used to store successfully decrypted file names.
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$Files = Get-Item -LiteralPath $FileName
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ForEach($File in $Files)
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{
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#Verify file ends with supplied suffix
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If(-not $File.Name.EndsWith($Suffix))
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{
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Write-Error "$($File.FullName) does not have an extension of '$Suffix'."
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@ -130,7 +109,6 @@ Param(
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$FileStreamReader = New-Object System.IO.FileStream($File.FullName, [System.IO.FileMode]::Open)
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$FileStreamWriter = New-Object System.IO.FileStream($DestinationFile, [System.IO.FileMode]::Create)
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#Get IV from file
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[Byte[]]$LenIV = New-Object Byte[] 4
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$FileStreamReader.Seek(0, [System.IO.SeekOrigin]::Begin) | Out-Null
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$FileStreamReader.Read($LenIV, 0, 3) | Out-Null
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@ -140,21 +118,17 @@ Param(
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$FileStreamReader.Read($IV, 0, $LIV) | Out-Null
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$Crypto.IV = $IV
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#Peform Decryption
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$Transform = $Crypto.CreateDecryptor()
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$CryptoStream = New-Object System.Security.Cryptography.CryptoStream($FileStreamWriter, $Transform, [System.Security.Cryptography.CryptoStreamMode]::Write)
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$FileStreamReader.CopyTo($CryptoStream)
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#Close open files
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$CryptoStream.FlushFinalBlock()
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$CryptoStream.Close()
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$FileStreamReader.Close()
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$FileStreamWriter.Close()
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#Delete encrypted file
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if($RemoveSource){Remove-Item $File.FullName}
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#Output decrypted file
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Get-Item $DestinationFile | Add-Member –MemberType NoteProperty –Name SourceFile –Value $File.FullName -PassThru
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}
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Catch
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@ -162,7 +136,6 @@ Param(
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Write-Error $_
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If($FileStreamWriter)
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{
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#Remove failed file
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$FileStreamWriter.Close()
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Remove-Item -LiteralPath $DestinationFile -Force
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}
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@ -188,7 +161,7 @@ try {
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}
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$PasswordBase64 = [System.Convert]::ToBase64String($Password)
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Unprotect-File "$Path" -algorithm AES -keyAsPlainText $PasswordBase64 -removeSource
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DecryptFile "$Path" -algorithm AES -keyAsPlainText $PasswordBase64 -removeSource
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write-output "OK."
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exit 0
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} catch {
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@ -8,9 +8,7 @@
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param([string]$Path = "", [string]$Password = "")
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Set-StrictMode -Version Latest
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Function Protect-File
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function EncryptFile
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{
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<#
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.SYNOPSIS
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@ -42,22 +40,6 @@ Removes the source (decrypted) file after encrypting.
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.OUTPUTS
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System.IO.FileInfo. Protect-File will return FileInfo with the SourceFile, Algorithm, Key, CipherMode, and PaddingMode as added NoteProperties
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.EXAMPLE
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Protect-File 'C:\secrets.txt' $key
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This example encrypts C:\secrets.txt using the key stored in the variable $key. The encrypted file would have the default extension of '.AES' and the source (decrypted) file would not be removed.
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.EXAMPLE
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Protect-File 'C:\secrets.txt' -Algorithm DES -Suffix '.Encrypted' -RemoveSource
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This example encrypts C:\secrets.txt with a randomly generated DES key. The encrypted file would have an extension of '.Encrypted' and the source (decrypted) file would be removed.
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.EXAMPLE
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Get-ChildItem 'C:\Files' -Recurse | Protect-File -Algorithm AES -Key $key -RemoveSource
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This example encrypts all of the files under the C:\Files directory using the key stored in the variable $key. The encrypted files would have the default extension of '.AES' and the source (decrypted) files would be removed.
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.NOTES
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Author: Tyler Siegrist
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Date: 9/22/2017
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#>
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[CmdletBinding(DefaultParameterSetName='SecureString')]
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[OutputType([System.IO.FileInfo[]])]
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@ -81,68 +63,55 @@ Param(
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[Parameter()]
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[Switch]$RemoveSource
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)
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Begin
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{
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#Configure cryptography
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try
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{
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if($PSCmdlet.ParameterSetName -eq 'PlainText')
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{
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begin {
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try {
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if ($PSCmdlet.ParameterSetName -eq 'PlainText') {
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$Key = $KeyAsPlainText | ConvertTo-SecureString -AsPlainText -Force
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}
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#Decrypt cryptography Key from SecureString
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$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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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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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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}
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Catch
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{
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} catch {
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Write-Error $_ -ErrorAction Stop
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}
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}
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Process
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{
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process {
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$Files = Get-Item -LiteralPath $FileName
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ForEach($File in $Files)
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{
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foreach($File in $Files) {
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$DestinationFile = $File.FullName + $Suffix
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Try
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{
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try {
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$FileStreamReader = New-Object System.IO.FileStream($File.FullName, [System.IO.FileMode]::Open)
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$FileStreamWriter = New-Object System.IO.FileStream($DestinationFile, [System.IO.FileMode]::Create)
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#Write IV (initialization-vector) length & IV to encrypted file
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$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, $Crypto.IV.Length)
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#Perform encryption
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$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($CryptoStream)
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#Close open files
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$CryptoStream.FlushFinalBlock()
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$CryptoStream.Close()
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$FileStreamReader.Close()
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$FileStreamWriter.Close()
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#Delete unencrypted file
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if($RemoveSource){Remove-Item -LiteralPath $File.FullName}
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if ($RemoveSource) {
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Remove-Item -LiteralPath $File.FullName
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}
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#Output ecrypted file
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$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 $Algorithm
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@ -150,20 +119,14 @@ Param(
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$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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}
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Catch
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{
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} catch {
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Write-Error $_
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If($FileStreamWriter)
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{
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#Remove failed file
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if ($FileStreamWriter) {
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$FileStreamWriter.Close()
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Remove-Item -LiteralPath $DestinationFile -Force
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}
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Continue
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}
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Finally
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{
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continue
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} finally {
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if($CryptoStream){$CryptoStream.Close()}
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if($FileStreamReader){$FileStreamReader.Close()}
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if($FileStreamWriter){$FileStreamWriter.Close()}
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@ -182,7 +145,7 @@ try {
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}
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$PasswordBase64 = [System.Convert]::ToBase64String($Password)
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Protect-File "$Path" -Algorithm AES -KeyAsPlainText $PasswordBase64 -RemoveSource
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EnryptFile "$Path" -Algorithm AES -KeyAsPlainText $PasswordBase64 -RemoveSource
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write-output "OK."
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exit 0
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} catch {
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