`pwsh` base64 encode/decode scraps

base64-image-encode.ps1

$inputFile = "azure-sdk-qr-smaller.PNG"
$file = "re-rewritten.txt"; 
$test_out = "re-out.png"

# to base64
[System.Convert]::ToBase64String((Get-Content $inputFile -AsByteStream)) | Set-Content $file

# back to bytes
[Convert]::FromBase64String((Get-Content $file)) | Set-Content $test_out -AsByteStream

base64-text-encode.ps1

param(
    $file="your-text-file.txt"
)

$ENCODED = [Convert]::ToBase64String([Text.Encoding]::Unicode.GetBytes((Get-Content $file -Raw)))
Write-Output $ENCODED

$DECODED = [System.Text.Encoding]::Unicode.GetString([System.Convert]::FromBase64String($ENCODED))
Write-Output $DECODED

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