ConvertTo-Base64.ps1

Function ConvertTo-Base64{
    <#
    .Synopsis
    Converts a plaintext string in to Base64.
    .Description
    Takes a plaintext string as a parameter, either directly or from the pipeline, and converts it in to Base64.
    .Parameter TextString
    The plaintext string. Can come from the pipeline.
    .Parameter Bytes
    Bytes to be directly converted to Base64
    .Parameter Encoding
    Default encoding is UTF8, but this can be Unicode, ASCII or UTF8 if you're having problems.
    .NOTES
    Version:        1.0
    Author:         C. Bodett
    Creation Date:  9/14/2021
    Purpose/Change: Initial function development.
    #>
    [cmdletbinding()]
    Param (
        [Parameter(ValueFromPipeline = $true, Position = 0, Mandatory = $false)]
        [ValidateNotNullOrEmpty()]
        [String]$TextString,
        [Parameter(ValueFromPipeline = $false, Position = 0, Mandatory = $false)]
        [ValidateNotNullOrEmpty()]
        [Byte[]]$Bytes,
        [Parameter(Position = 1)]
        [ValidateSet('UTF8','Unicode','ASCII')]
        [String]$Encoding = 'UTF8'
    )

    Switch ($PSBoundParameters.Keys) {
        'TextString' {
            $Encoded = [System.Convert]::ToBase64String([System.Text.Encoding]::$Encoding.GetBytes($TextString))
        }
        'Bytes' {
            $Encoded = [System.Convert]::ToBase64String($Bytes)
        }
    }
    $Encoded
}