650 lines
24 KiB
PowerShell
650 lines
24 KiB
PowerShell
<#
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.Synopsis
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Allows the secure transfer and reconciliation of a large number of files
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PTRfile: Protect, Transfer, Reconcile files
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.Description
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Packages source folder contents into a 7ZIP file, adding a reconciliation
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file to the 7ZIP file and then encrypting the contents. Send
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* this script
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* the 7ZIP package file
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* plus optional SecretFilename ( if using RecipientKeyName )
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to the target or recipient.
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The source folder is not altered and only read rights are required. A log
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file is written at exceution to record activity.
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The SecretFileName can be sent via email, while the 7ZIP can go different routes
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due to possible size such as:
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* Cloud storage provider
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* HTTPS web file upload
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* SFTP transfer
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* USB stick
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At the target, unpack the contents to a folder and reconcile the results. You
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will need write access on the target storage. A log file is written at exceution
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to record activity.
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Your bulk file transfer is encrypted in transit. Note that if you use the
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SecretKey method the ecnrypted contents will only be as secure as the strength
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of your secret.
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You can use storage providers such as Dropbox, AWS S3, Google Drive, OneDrive or BackBlaze
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and your documents have additonal protection.
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A log file is produced on execution. Repeated executions on the same day
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will add text content to the same log file. The default log name takes the form:
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"ptr_files_yyyy-MM-dd.log"
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You will need to have installed the 7Zip4Powershell PowerShell cmdlet
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before using the pack or unpack actions. You can install the cmdlet
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by executing
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.\ptrFiles.ps1 -Action install -Path ".\"
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Author: Tom Peltonen
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.Parameter Action
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Action to perform, which can be:
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- Install
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- Pack
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- Unpack
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- Reconcile
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- ReconcileFile
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.Parameter Path
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The path to the files and folders to pack or the path to the unpack location.
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The path can include a trailing * as a wildcard to only include a subset of
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directories.
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When using the trailing * for names, the filtering is only applied to immediate
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folder names under the parent folder. The filter does not cascade to lower folders.
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.Parameter RecipientKeyName
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The recipient of the package which is used to find the appropriate
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certificate for encrypting with the public key. Either the RecipientKeyName
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or the SecretKey is required for packing or unpacking the 7ZIP file.
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Using the RecipientKeyName is the most secure transfer option as a
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asymmetric cryptographic key is used that can only be decrypted by the
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holder of the private key.
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If you are using the RecipientKeyName, then the 7ZIP file contents can only
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be unzipped by the holder of the private key and the SecretFileName file.
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If you don't have the private, which you should not unless you are sending
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to yourself, then you cannot unpack the 7ZIP file.
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.Parameter SecretKey
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A tradiitional secret to encrypt or decrypt the 7ZIP package. Either the RecipientKeyName
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or the SecretKey is required for packing or unpacking the 7ZIP file. This method
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uses a symmetric cryptographic key exchange which is less secure then the
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RecipientKeyName approach.
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.Parameter TransferFileName
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The location and name of the 7ZIP file. If not supplied a default 7ZIP file name
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will be generated in the current directory.
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The default name will take the form ".\transfer_protect_yyyyMMdd_hhmm.7z"
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.Parameter RootFolderName
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The root folder, which should be used if using wildcard (*) for the
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path. A guess will be made as to value if not supplied, which will
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work in many circumstances.
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.Parameter FileFilter
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A filter on file names. This does not filter directories.
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An example to only include JPEG file is "*.jpg". You can also
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filter on picture file names starting with "IMG*.jpg"
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.Parameter ReconcileFileName
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The name of the reconfile file name to generate during pack or use
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during unpack. This is a file name without path. If no value is
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supplied, then a default name is generated.
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The reconcile file is included into the root of the 7ZIP file.
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Once a reconcile is executed, you can delete this file from the
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restored location.
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The default name is "##protect_transfer_reconcile_files##.csv"
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.Parameter SecretFileName
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The secret file name is used with RecipientKeyName to secure the
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internally generated password for the 7ZIP file. When unpacking the
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7ZIP file you will need access to this file if RecipientKeyName
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was used. If not supplied a default name is used. This file is
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encrypted with RecipientKeyName.
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The default name is ".\transfer.key"
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.Parameter ExcludeHash
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Exclude the file hash from the reconcile file. As producing a file
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hash takes compute cycles during pack, you can select to bypass this
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generation to speed up the packaging. Excluding the hash does reduce
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the functionality of the reconciliation at unpack.
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.Parameter LogPath
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The log folder where log files are written. If the folder does not
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exist then it is created. You need write access rights to this location.
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.Notes
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This script has been written to use the 7ZIP function as it is open source
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and provides a secure encryption mechanism, plus portability on Windows,
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Linux and MacOS.
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It is also beneficial that 7ZIP has efficient compression algorithms.
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Compressing and packing a large data set can take significant time and also
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require storage space. The script does not check if you have sufficient
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free storage to package the source contents into a single 7ZIP file. It is your
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responsibility to ensure sufficient storage space exists.
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If you need to copy files from one directory to another accessible directory from
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your Windows desktop, you might consider using ROBOCOPY. If the target directory
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is not accessible and you want to reconcile, then this tool is appropriate.
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.Example
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# Pack and encrypt all files in folder ".\transferpack\" using a private-public key
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# A file named ".\transfer.key" is also generated alongside the 7ZIP file
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.\ptrFiles.ps1 -Action pack -Path ".\transferpack\" -RecipientKeyName data@mycompany
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.Example
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# Unpack all files in 7ZIP file "transfer_protect_yyyMMdd_hhmm.7z" to folder ".\targetdir" using a private-public key
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# You will need the file named ".\transfer.key" to unpack the encrypted 7ZIP file
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.\ptrFiles.ps1 -Action unpack -TransferFileName "transfer_protect_yyyMMdd_hhmm.7z" -Path ".\targetdir" -RecipientKeyName data@mycompany
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.Example
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# Reconcile files in folder ".\targetdir"
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.\ptrFiles.ps1 -Action reconcile -Path ".\targetdir"
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.Example
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# Pack and encrypt all files in folder ".\transferpack\" using a password
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.\ptrFiles.ps1 -Action pack -Path ".\transferpack\" -SecretKey "fjks932c-x=23ds"
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.Example
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# Unpack all files in 7ZIP file "transfer_protect_yyyMMdd_hhmm.7z" to folder ".\targetdir" using a password
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.\ptrFiles.ps1 -Action unpack -TransferFileName "transfer_protect_yyyMMdd_hhmm.7z" -Path ".\targetdir" -SecretKey "fjks932c-x=23ds"
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.Example
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# Pack and encrypt all files in folder ".\transferpack\02*" where the folder name starts with "02" using a password
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.\ptrFiles.ps1 -Action pack -Path ".\transferpack\02*" -SecretKey "fjks932c-x=23ds"
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#>
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param (
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[Parameter(Mandatory)][String] $Action,
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[Parameter(Mandatory)][String] $Path,
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[String] $RecipientKeyName,
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[String] $SecretKey,
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[String] $TransferFileName,
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[String] $RootFolderName,
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[String] $FileFilter,
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[String] $ReconcileFileName,
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[String] $SecretFileName,
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[switch] $ExcludeHash,
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[String] $LogPath
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)
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$default_dateLocal = Get-Date -Format "yyyyMMdd_HHmm"
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$default_archiveFile = ".\ptr_file_##date##.7z"
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$default_reconcileFile = "##protect_transfer_reconcile_files##.csv"
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$default_secretEncrypted = ".\transfer.key"
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function Write-Log {
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param(
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[String] $LogEntry
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)
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$date = Get-Date -f "yyyy-MM-dd"
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if ($LogPath -eq "")
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{
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$logPath = Join-Path -Path ".\" -ChildPath "Logs"
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}
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$logName = "ptr_files_$date.log"
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$sFullPath = Join-Path -Path $logPath -ChildPath $logName
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if (!(Test-Path -Path $logPath)) {
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$null = New-Item -Path $logPath -ItemType Directory
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}
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if (!(Test-Path -Path $sFullPath)) {
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Write-Host "Log path: $sFullPath"
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$null = New-Item -Path $sFullPath -ItemType File
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}
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$dateTime = Get-Date -f "yyyy-MM-dd HH:mm:ss"
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Add-Content -Path $sFullPath -Value "[$dateTime]. $LogEntry"
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}
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function Close-Log {
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$dateTime = Get-Date -f "yyyy-MM-dd HH:mm:ss"
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Write-Log "***********************************************************************************"
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Write-Log "* End of processing: [$dateTime]"
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Write-Log "***********************************************************************************"
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}
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function New-RandomPassword {
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param(
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[int] $length = 20,
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[String] $characters = "abcdefghiklmnoprstuvwxyzABCDEFGHKLMNOPRSTUVWXYZ1234567890!()?}][{@#*+-",
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[switch] $ConvertToSecureString
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)
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$password = 1..$length | ForEach-Object { Get-Random -Maximum $characters.length }
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$private:ofs=""
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if ($ConvertToSecureString.IsPresent) {
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return ConvertTo-SecureString -String [String]$characters[$password] -AsPlainText -Force
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} else {
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return [String]$characters[$password]
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}
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}
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function Test-Files
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{
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Param(
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[Parameter(Mandatory)][String] $FolderName,
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[String] $FileFilter
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)
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Get-ChildItem $folderName -Recurse | Where-Object {!$_.PSIsContainer} | ForEach-Object {
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return $true
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}
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return $false
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}
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# Reconcile
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function Set-Reconcile
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{
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Param(
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[Parameter(Mandatory)][String] $ReconcileFile,
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[Parameter(Mandatory)][String] $FolderName,
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[String] $RootFolderName,
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[String] $FileFilter,
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[switch] $Feedback = $false
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)
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if ($reconcileFile -eq "")
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{
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$reconcileFile = $default_reconcileFile
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}
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If (!(Test-Path -Path $folderName )) {
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Write-Log "Folder '$folderName' does not exist"
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Write-Host "Folder '$folderName' does not exist" -ForegroundColor Red
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Close-Log
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Exit
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}
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Write-Log "Generating reconciliation file '$reconcileFile'"
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Write-Host "Generating reconciliation file '$reconcileFile'"
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$totalFileCount = 0
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$totalFileSize = 0
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if ($rootFolderName -eq "") {
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$rootFolderName = $folderName
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}
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Set-Content -Path $reconcileFile -Value '"FullName","LastWriteTime","Length","Hash","ParentFolder","Object"'
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Get-ChildItem $folderName -Filter $fileFilter -Recurse | Where-Object {!$_.PSIsContainer} | ForEach-Object {
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$totalFilecount = $totalFileCount + 1
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$totalFileSize = $totalFileSize + $_.Length
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if ($ExcludeHash) {
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$sourceHash = ""
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} else {
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$sourceHash = (Get-FileHash -Path $_.FullName).Hash
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}
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$record = '"'+$_.FullName.Replace($rootFolderName, "")+'","'+$_.LastWriteTime.ToString("yyyy-MM-ddTHH:mm:ss")+'",'+$_.Length+',"'+$sourceHash+'","'+ $_.Directory + '","' + $_.Name + '"'
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Add-Content -Path $reconcileFile -Value $record
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}
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if ($totalFileSize -ge 1000000000000) {
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$totalRightLabel = "TB"
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$totalFileXbytes = [math]::Round(($totalFileSize / 1000000000000), 2)
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} else {
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if ($totalFileSize -ge 1000000000) {
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$totalRightLabel = "GB"
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$totalFileXbytes = [math]::Round(($totalFileSize / 1000000000), 2)
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} else {
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if ($totalFileSize -ge 1000000) {
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$totalRightLabel = "MB"
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$totalFileXbytes = [math]::Round(($totalFileSize / 1000000), 2)
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} else {
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$totalRightLabel = "KB"
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$totalFileXbytes = [math]::Round(($totalFileSize / 1000), 2)
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}
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}
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}
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Write-Log "Total reconcile file count is $totalFileCount and size $totalFileXbytes $totalRightLabel ($totalFileSize)"
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if ($feedback) {
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Write-Host "Total reconcile file count is $totalFileCount and size $totalFileXbytes $totalRightLabel" -ForegroundColor Green
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}
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}
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# Compress / Package
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function Invoke-Pack
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{
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Param(
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[String] $TransferFolder,
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[String] $RootFolder,
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[String] $FileFilter,
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[String] $Secret,
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[String] $CompressFile,
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[String] $ReconcileFile
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)
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If (!(Test-Path -Path $transferFolder )) {
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Write-Log "Folder '$transferFolder' does not exist"
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Write-Host "Folder '$transferFolder' does not exist" -ForegroundColor Red
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Close-Log
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Exit
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}
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Write-Log "Saving folders/files to archive file '$compressFile'"
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Write-Log "Source folder is '$transferFolder'"
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Write-Host "Saving folders/files to archive file '$compressFile'"
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if ($reconcileFile -eq "")
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{
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$reconcileFile = $default_reconcileFile
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}
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if ($fileFilter -eq "")
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{
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$fileFilter = "*"
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}
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if ($transferFolder.EndsWith("*"))
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{
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$firstCompress = $true
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Get-ChildItem $transferFolder| ForEach-Object {
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Write-Log "Archive folder '$($_.FullName)'"
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Write-Host "Archivefolder '$($_.FullName)'"
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if (Test-Files -FolderName $_.FullName -FileFilter $fileFilter) {
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try {
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if ($firstCompress) {
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Compress-7Zip -Path $_.FullName -ArchiveFileName $compressFile -Format SevenZip -PreserveDirectoryRoot -Filter $fileFilter
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} else {
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Compress-7Zip -Path $_.FullName -ArchiveFileName $compressFile -Format SevenZip -PreserveDirectoryRoot -Filter $fileFilter -Append
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}
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$firstCompress = $false
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} catch {
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Write-Log "Compress error with file '$($_.FullName)'. See any previous errors. $Error"
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Write-Host "Compress error with file '$($_.FullName)'. See any previous errors. $Error" -ForegroundColor Red
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}
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} else {
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Write-Log "Empty folder '$($_.FullName)'"
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Write-Host "Empty folder '$($_.FullName)'"
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}
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}
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} else {
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Write-Log "Archive folder '$transferFolder'"
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Write-Host "Archive folder '$transferFolder'"
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Compress-7Zip -Path $transferFolder -ArchiveFileName $compressFile -Format SevenZip -Filter $fileFilter
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}
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If (!(Test-Path -Path $compressFile )) {
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Write-Log "Archive file '$compressFile' was not created. See any previous errors"
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Write-Host "Archive file '$compressFile' was not created. See any previous errors" -ForegroundColor Red
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Close-Log
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Exit
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}
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Set-Reconcile -ReconcileFile $reconcileFile -FolderName $transferFolder -FileFilter $fileFilter -RootFolderName $rootFolder
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If (!(Test-Path -Path $reconcileFile )) {
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Write-Log "Reconcile file '$reconcileFile' was not created. See any previous errors"
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Write-Host "Reconcile file '$reconcileFile' was not created. See any previous errors" -ForegroundColor Red
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Close-Log
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return
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}
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Write-Log "Add reconcile file '$reconcileFile' to file '$compressFile'"
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$fullReconcileName = (Get-Item $reconcileFile).FullName
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$fullZipName = (Get-Item $compressFile).FullName
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Compress-7Zip -Path $fullReconcileName -ArchiveFileName $fullZipName -Format SevenZip -Append -Password $secret -EncryptFilenames
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Remove-Item $fullReconcileName
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Write-Log "Archive file '$compressFile' created from folder '$transferFolder'"
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Write-Host "Archive file '$compressFile' created from folder '$transferFolder'" -ForegroundColor Green
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}
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function Invoke-Unpack
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{
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Param(
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[String] $RestoreFolder,
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[String] $Secret,
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[String] $CompressFile
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)
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If (!(Test-Path -Path $CompressFile )) {
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Write-Log "Archive file '$CompressFile' does not exist"
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Write-Host "Archive file '$CompressFile' does not exist" -ForegroundColor Red
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Close-Log
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Exit
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}
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Write-Log "Restoring files transferred to '$restoreFolder'"
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Write-Log "Archive file is '$compressFile'"
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# Uncompress the data files
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Expand-7Zip -ArchiveFileName $compressFile -TargetPath $restoreFolder -Password $secret
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Write-Log "Contents unpacked from archive file '$compressFile' to folder '$restoreFolder'"
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Write-Host "Contents unpacked from archive file '$compressFile' to folder '$restoreFolder'" -ForegroundColor Green
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}
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# Reconcile
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function Invoke-Reconcile
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{
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Param(
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[Parameter(Mandatory)][String] $ReconcileFile,
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[Parameter(Mandatory)][String] $Folder,
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[String] $TargetReconcileFile
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)
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if ($reconcileFile -eq "")
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{
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$reconcileFile = $default_reconcileFile
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}
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Write-Log "Reconciling documents transferred"
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Write-Host "Reconciling documents transferred"
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If (!(Test-Path -Path $reconcileFile )) {
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Write-Log "Reconciliation file '$reconcileFile' does not exist"
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Write-Host "Reconciliation file '$reconcileFile' does not exist" -ForegroundColor Red
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Close-Log
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Exit
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}
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If (!(Test-Path -Path $folder )) {
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Write-Log "Folder '$folder' does not exist"
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Write-Host "Folder '$folder' does not exist" -ForegroundColor Red
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Close-Log
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Exit
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}
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Write-Log "Using reconciliation file '$reconcileFile'"
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$totalFileCount = 0
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$totalFileSize = 0
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$errorCount = 0
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$missingHash = $false
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# For each entry in the reconcile file
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# find the file and compare hash
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Import-Csv $reconcileFile | ForEach-Object {
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$totalFileCount = $totalFileCount +1
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$restoreFileName = $(Join-Path -Path $folder -ChildPath $_.FullName)
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If (Test-Path -Path $restoreFileName ) {
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if ($_.Hash -ne "") {
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$targetHash= (Get-FileHash -Path $restoreFileName).Hash
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if ($_.Hash -ne $targetHash) {
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$errorCount = $errorCount + 1
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Write-Log "Hash mismatch for file '$restoreFileName'"
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}
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} else {
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$missingHash = $true
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}
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if ((Get-Item -Path $restoreFileName).LastWriteTime.ToString("yyyy-MM-ddTHH:mm:ss") -ne $_.LastWriteTime) {
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$errorCount = $errorCount + 1
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Write-Log "Last write mismatch for file '$restoreFileName'"
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}
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$totalFileSize = $totalFileSize + (Get-Item -Path $restoreFileName).Length
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} else {
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$errorCount = $errorCount + 1
|
|
Write-Log "Non existant target file '$restoreFileName'"
|
|
}
|
|
}
|
|
|
|
if ($totalFileSize -ge 1000000000000) {
|
|
$totalRightLabel = "TB"
|
|
$totalFileXbytes = [math]::Round(($totalFileSize / 1000000000000), 2)
|
|
} else {
|
|
if ($totalFileSize -ge 1000000000) {
|
|
$totalRightLabel = "GB"
|
|
$totalFileXbytes = [math]::Round(($totalFileSize / 1000000000), 2)
|
|
} else {
|
|
if ($totalFileSize -ge 1000000) {
|
|
$totalRightLabel = "MB"
|
|
$totalFileXbytes = [math]::Round(($totalFileSize / 1000000), 2)
|
|
} else {
|
|
$totalRightLabel = "KB"
|
|
$totalFileXbytes = [math]::Round(($totalFileSize / 1000), 2)
|
|
}
|
|
}
|
|
}
|
|
Write-Log "Total file storage size is $totalFileXbytes $totalRightLabel ($totalFileSize)"
|
|
Write-Host "Total file storage size is $totalFileXbytes $totalRightLabel"
|
|
|
|
Write-Log "Total file count is $totalFileCount with $errorCount errors"
|
|
if ($missingHash)
|
|
{
|
|
Write-Log "Reconcile file had one or many or all blank hash entries"
|
|
Write-Host "Reconcile file had one or many or all blank hash entries" -ForegroundColor Yellow
|
|
}
|
|
if ($errorCount -gt 0) {
|
|
Write-Host "Total file count is $totalFileCount with $errorCount errors" -ForegroundColor Red
|
|
} else {
|
|
Write-Host "Total file count is $totalFileCount with $errorCount errors" -ForegroundColor Green
|
|
}
|
|
}
|
|
|
|
$dateTimeStart = Get-Date -f "yyyy-MM-dd HH:mm:ss"
|
|
Write-Log "***********************************************************************************"
|
|
Write-Log "* Start of processing: [$dateTimeStart]"
|
|
Write-Log "***********************************************************************************"
|
|
|
|
|
|
$actioned = $false
|
|
|
|
if ($action -eq "Install") {
|
|
$actioned = $true
|
|
Install-Module -Name 7Zip4Powershell -Scope CurrentUser
|
|
}
|
|
|
|
if ($action -eq "Pack") {
|
|
$actioned = $true
|
|
if (($RecipientKeyName -eq "") -and ($SecretKey -eq "")) {
|
|
Write-Log "Recipient Key Name or Secret Key required for packing"
|
|
Write-Host "Recipient Key Name or Secret Key required for packing" -ForegroundColor Red
|
|
Close-Log
|
|
return
|
|
}
|
|
|
|
if ($rootFolderName -eq "") {
|
|
if ($path.EndsWith("*")) {
|
|
Write-Log "Root folder required for packing when using wild card for Path"
|
|
Write-Host "Root folder required for packing when using wild card for Path" -ForegroundColor Red
|
|
Close-Log
|
|
return
|
|
} else {
|
|
$rootFolderName = $path
|
|
}
|
|
}
|
|
|
|
if ($TransferFileName -eq "") {
|
|
$TransferFileName = $default_archiveFile.Replace("##date##", $default_dateLocal)
|
|
}
|
|
|
|
if ($SecretKey -eq "") {
|
|
if ($secretFileName -eq "")
|
|
{
|
|
$secretFileName = $default_secretEncrypted
|
|
}
|
|
$secret = New-RandomPassword -Length 80
|
|
Protect-CmsMessage -To $recipientKeyName -OutFile $secretFileName -Content $secret
|
|
} else {
|
|
$secret = $SecretKey
|
|
}
|
|
|
|
Invoke-Pack -TransferFolder $path -Secret $secret -CompressFile $transferFileName -ReconcileFile $reconcileFileName -RootFolder $rootFolderName -FileFilter $fileFilter
|
|
}
|
|
|
|
|
|
if ($action -eq "Unpack") {
|
|
$actioned = $true
|
|
if (($RecipientKeyName -eq "") -and ($SecretKey -eq "")) {
|
|
Write-Log "Recipient Key Name or Secret Key required for unpacking"
|
|
Write-Host "Recipient Key Name or Secret Key required for unpacking" -ForegroundColor Red
|
|
Close-Log
|
|
return
|
|
}
|
|
if ($TransferFileName -eq "") {
|
|
Write-Log "Archive file Name required for unpacking"
|
|
Write-Host "Archive file Name required for unpacking" -ForegroundColor Red
|
|
Close-Log
|
|
return
|
|
}
|
|
|
|
if ($SecretKey -eq "") {
|
|
if ($secretFileName -eq "")
|
|
{
|
|
$secretFileName = $default_secretEncrypted
|
|
}
|
|
$secret = Unprotect-CmsMessage -To $recipientKeyName -Path $secretFileName
|
|
} else {
|
|
$secret = $SecretKey
|
|
}
|
|
Invoke-Unpack -RestoreFolder $path -Secret $secret -CompressFile $transferFileName
|
|
|
|
}
|
|
|
|
|
|
if ($action -eq "ReconcileFile") {
|
|
$actioned = $true
|
|
if ($reconcileFileName -eq "")
|
|
{
|
|
$reconcileFileName = $default_reconcileFile
|
|
}
|
|
Set-Reconcile -ReconcileFile $reconcileFileName -FolderName $path -Feedback -RootFolderName $rootFolderName -FileFilter $fileFilter
|
|
}
|
|
|
|
|
|
if ($action -eq "Reconcile") {
|
|
$actioned = $true
|
|
if ($reconcileFileName -eq "")
|
|
{
|
|
$reconcileFileName = $default_reconcileFile
|
|
}
|
|
$localReconcileFile = Join-Path -Path $path -ChildPath $reconcileFileName
|
|
Invoke-Reconcile -ReconcileFile $localReconcileFile -Folder $path
|
|
}
|
|
|
|
|
|
if (!($actioned))
|
|
{
|
|
Write-Log "Unknown action '$action'. No processing performed"
|
|
Write-Host "Unknown action '$action'. No processing performed" -ForegroundColor Red
|
|
Write-Host "Recognised actions: "
|
|
Write-Host " Pack : Pack folder contents into secure 7Zip file"
|
|
Write-Host " Unpack : Unpack folder contents from secure 7Zip file"
|
|
Write-Host " Reconcile : Reconcile files in unpack folder with list of packed files"
|
|
Write-Host " ReconcileFile : Generate a reconcile file without packing"
|
|
Write-Host " Install : Install required packages"
|
|
}
|
|
|
|
Close-Log
|