Small drag-and-drop wrapper script for GnuPG

gpgwrapper.ps1

$gpgid = "DEADBEEF" # recipient ID (hex/email)
# add full path to binaries if needed
$gpgcommand = "gpg2"
$7zcommand = "7z"

foreach ($file in $args) {
    $source = Get-Item -ErrorAction:SilentlyContinue $file
    if ($source) {
        if (-not $source.PSIsContainer) {
            # file encryption/decryption
            if ($source.Name.ToLower().EndsWith(".gpg")) {
                # file decryption
                $target = $source.FullName.Substring(0, $source.FullName.Length - 4)
                & $gpgcommand "--decrypt" "--yes" "--output" $target $source
            } else {
                # file encryption
                $target = $source.FullName + ".gpg"
                & $gpgcommand "--encrypt" "--sign" "--recipient" $gpgid "--output" $target $source
            }
        } else {
            # compress directory to temporary zip file
            $tmpzipfile = [IO.Path]::GetTempPath() + [IO.Path]::GetRandomFileName()
            & $7zcommand "a" "-tzip" "-mx=9" $tmpzipfile $source
            # encrypt zip file
            $target = $source.FullName + ".zip.gpg"
            & $gpgcommand "--encrypt" "--sign" "--recipient" $gpgid "--compress-level" "0" `
                "--output" $target $tmpzipfile
            Remove-Item -Force $tmpzipfile
        }
    }
}