src/decode64.ps1
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#!/usr/bin/env pwsh $ErrorActionPreference = "Stop" Set-StrictMode -Version Latest <# .SYNOPSIS Outputs the decoded text from a base64 encoded string. .PARAMETER EncodedText The base64 encoded string to decode. .PARAMETER AsBytes If specified, the output will be a byte array instead of a string. .PARAMETER Encoding The encoding to use when converting the binary data to text. Defaults to UTF8. .OUTPUTS System.String System.Byte[] .EXAMPLE decode64 "SGVsbG8gV29ybGQh" #> function decode64 { param( [Parameter(Mandatory=$true, Position=0, ValueFromPipeline=$true, ParameterSetName="Text")] [ValidateNotNullOrEmpty()] [string] $EncodedText, [Parameter(Mandatory=$false, Position=1, ParameterSetName="Bytes")] [switch] $AsBytes, [Parameter(Mandatory=$false, Position=1, ParameterSetName="Text")] [ValidateNotNullOrEmpty()] [Encoding] $Encoding = [System.Text.Encoding]::UTF8 ) [byte[]] $bytes = [Convert]::FromBase64String($EncodedText) if ($AsBytes) { return $bytes } else { return $Encoding.GetString($bytes) } } |