A powershell script to bulk decrypt files encrypted with SharpAESCrypt (Duplicati)

SharpAESCrypt-Decrypt.ps1

# Function to update the progress bar
function Update-ProgressBar {
    param (
        [int]$Completed,
        [int]$Total,
        [int]$RunningJobs,
        [int]$FailedJobs
    )

    $RemainingFiles = $Total - $Completed - $FailedJobs  # Subtract failed jobs from remaining files
    $Progress = [math]::Round(($Completed / $Total) * 100, 3)  # Calculate progress percentage rounded to 3 decimals
    $ProgressBar = "[{0}{1}] {2,6:F3}% - Comp: {3}/{4} - Rem: {5}/{4} - Run: {6} - Fail: {7}" -f ('#' * ($Progress / 10)), (' ' * (10 - $Progress / 10)), $Progress, $Completed, $Total, $RemainingFiles, $RunningJobs, $FailedJobs
    Write-Progress -Activity "Processing Files" -Status $ProgressBar -Id 1
}

# Set the paths and parameters - change the SourceDirectory and OutputDirectory paths to suit your needs
$ScriptDirectory = Split-Path -Parent $MyInvocation.MyCommand.Path
$SharpAESCryptPath = Join-Path $ScriptDirectory "SharpAESCrypt.exe"
$Password = "password"
$SharpTask = "d"
$SourceDirectory = "F:\backblaze-duplicati\SourceAES"
$OutputDirectory = "F:\backblaze-duplicati\DestZIP"

# Get a list of files to decrypt
$FilesToDecrypt = Get-ChildItem -Path $SourceDirectory -Filter "*.zip.aes" -File
$TotalFiles = $FilesToDecrypt.Count
$CompletedFiles = 0
$FailedJobs = 0
$MaxConcurrentJobs = 5
$JobResults = @{}

# Script block to decrypt a single file
$DecryptFileScript = {
    param (
        $SharpAESCryptPath,
        $SharpTask,
        $Password,
        $SourceFilePath,
        $OutputFilePath
    )

    # Execute the decryption command
    & $SharpAESCryptPath $SharpTask $Password $SourceFilePath $OutputFilePath

    if ($LASTEXITCODE -eq 0) {
        Write-Host "Successfully decrypted $SourceFilePath."
        return $true
    } else {
        if ($result -match "Invalid password or corrupted data") {
            Write-Host "Error: Invalid password or corrupted data occurred while decrypting $SourceFilePath."
        } else {
            Write-Host "An error occurred while decrypting $SourceFilePath."
        }
        return $false
    }
}

$JobQueue = New-Object System.Collections.Queue
$RunningJobs = 0

# Start processing each file in the source directory
foreach ($File in $FilesToDecrypt) {
    $OutputFile = Join-Path $OutputDirectory ($File.BaseName + ".zip")

    # Start a new job to decrypt the file
    $Job = Start-Job -ScriptBlock $DecryptFileScript -ArgumentList $SharpAESCryptPath, $SharpTask, $Password, $File.FullName, $OutputFile
    $JobQueue.Enqueue($Job)
    $RunningJobs++

    # Update the progress bar
    Update-ProgressBar -Completed $CompletedFiles -Total $TotalFiles -RunningJobs $RunningJobs -FailedJobs $FailedJobs

    # Limit the number of concurrent jobs to $MaxConcurrentJobs
    while ($RunningJobs -ge $MaxConcurrentJobs) {
        Start-Sleep -Milliseconds 500
        $CompletedJob = $JobQueue.Dequeue()
        $Result = Receive-Job $CompletedJob
        if ($Result -eq $false) {
            $FailedJobs++
        } else {
            $CompletedFiles++
        }
        Stop-Job $CompletedJob
        Remove-Job $CompletedJob
        $RunningJobs--
        Update-ProgressBar -Completed $CompletedFiles -Total $TotalFiles -RunningJobs $RunningJobs -FailedJobs $FailedJobs
    }
}

# Wait for any remaining jobs to complete
while ($JobQueue.Count -gt 0) {
    Start-Sleep -Milliseconds 500
    $CompletedJob = $JobQueue.Dequeue()
    $Result = Receive-Job $CompletedJob
    if ($Result -eq $false) {
        $FailedJobs++
    } else {
        $CompletedFiles++
    }
    Stop-Job $CompletedJob
    Remove-Job $CompletedJob
    $RunningJobs--
    Update-ProgressBar -Completed $CompletedFiles -Total $TotalFiles -RunningJobs $RunningJobs -FailedJobs $FailedJobs
}

# Export summary to results.txt file
$Summary = @"
Decryption process completed.

Total Files: $TotalFiles
Successfully Decrypted: $CompletedFiles
Failed Jobs: $FailedJobs
Remaining Files: $($TotalFiles - $CompletedFiles - $FailedJobs)
"@

$ResultsFilePath = Join-Path $ScriptDirectory "results.txt"
$Summary | Out-File -FilePath $ResultsFilePath

# Display completion message
Write-Host ""  # New line after processing is complete
Write-Host "Decryption process completed."