src/decodefile64.ps1
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#!/usr/bin/env pwsh $ErrorActionPreference = "Stop" Set-StrictMode -Version Latest <# .SYNOPSIS Converts the content of a file from base64 and writes the resulting binary data to a file. .PARAMETER LiteralPath Path to the file to decode. .PARAMETER Encoding The text encoding to use when writing the result to a file. Defaults to UTF8. .PARAMETER OutFile Path to the file to write the decoded content to. If not specified, it will be the same as the input file without the extension. .OUTPUTS System.IO.FileInfo #> function decodefile64 { param( [Parameter(Mandatory=$true, Position=0, ValueFromPipeline=$true)] [ValidateNotNullOrEmpty()] [ValidateScript({ Test-Path $_ -PathType Leaf })] [string] $LiteralPath, [Parameter(Mandatory=$false, Position=1)] [ValidateNotNullOrEmpty()] [Encoding] $Encoding = [System.Text.Encoding]::UTF8, [Parameter(Mandatory=$false, Position=2)] [ValidateNotNullOrEmpty()] [string] $OutFile = [System.IO.Path]::GetFileNameWithoutExtension($LiteralPath) ) Begin { if (Test-Path $OutFile -ErrorAction SilentlyContinue) { throw "The file already exists: ${OutFile}" } } Process { [byte[]] $decoded = [Convert]::FromBase64String([System.IO.File]::ReadAllText($LiteralPath, $Encoding)) [System.IO.File]::WriteAllBytes($OutFile, $decoded) return (Get-Item -LiteralPath $OutFile) } End { } } |