Portal

a command-line file transfer utility for sending files from any computer to another

Installation

On macOS/Linux, if you are using Homebrew

brew install portal

On Windows, if you are using Scoop

scoop install portal

On Arch Linux (AUR)

yay -S portal-bin

On any platform, you can get the latest release manually, or simply run

curl -sL portal.spatiumportae.com | bash

wget -qO - portal.spatiumportae.com | bash

How it works

Sending files and folders

To send files:

portal send <file1> <file2> <folder1> <folder2> ...

The application will output a temporary password on the format 1-inertia-elliptical-celestial.

The sender will communicate this password to the receiver over some secure channel.

Receiving files and folders

To receive those files:

portal receive 1-intertia-elliptical-celestial

The two clients will establish a connection through a relay server. The file transfer will then commence with a direct or relayed connection, depending on what's possible.

What it looks like

The sender (top) sends a folder and three files to the receiver (bottom).

In this case, as you can see in the event log, the transfer is made using direct transfer. That means that the files are sent directly from one client to the other, no middlemen involved.

As it happens, these computers are in the same local network, and portal recognizes this.

Features

portal provides:

• End-to-end encryption using PAKE2
• Direct transfer of files if possible (e.g. sender and receiver are in the same local network)
• Fallback to relay server if sender and receiver cannot connect directly
• Parallel gzip compression of files for faster and more efficient transfers
• Hosting your own relay (we'd appreciate it if you plan to send a lot of data!)
• Configurability and shell completions
• A shiny UI to gaze your eyes upon while you wait for your files

Completions

portal provides extensive TAB completions for the following shells:

• bash
• zsh
• fish
• powershell

To see installation instructions for your shell and platform, run:

portal completion [bash|zsh|fish|powershell] --help

You probably didn't quite catch the password Bob was screaming across the room.
You can use TAB completions to auto-complete passwords on the receiving end.

Press TAB when entering parts of your password...

portal receive 42-relative-parsec-s...

...and portal will suggest the possible words

$ portal receive 42-relative-parsec-s...

42-relative-parsec-supernova  42-relative-parsec-scatter    42-relative-parsec-solar      42-relative-parsec-spin       42-relative-parsec-static     
42-relative-parsec-sigma      42-relative-parsec-solid      42-relative-parsec-star       42-relative-parsec-storm      42-relative-parsec-system

boom. supernova.

portal receive 42-relative-parsec-supernova

Flags

Receiver

• -y/--yes: overwrite existing files without [Y/n] prompts

Relay

• -p/--port: port to host the relay server on

Sender and Receiver

• -r/--relay: address of the relay server (:8080, myrelay.io:1234, ...)
• -s/--tui-style: the style of the tui (rich | raw)

Sender, Receiver and Relay

• -h/--help: output help messages for any command
• -v/--verbose: log debug info to file

Configuration

portal places its configuration file in $HOME/.config/portal/config.yml.

As evident by the file extension, the config is a simple YAML file with descriptive field names.

Default configuration

# The URL of the relay server.
relay: portal.spatiumportae.com
# Log debug output to file.
verbose: false
# Prompt for overwriting duplicates when receiving files.
prompt_overwrite_files: true
# The port used when serving the relay using "portal serve".
relay_serve_port: 8080
# The style of the TUI.
tui_style: rich

Hosting your own relay

The portal binary comes with a built-in relay server.

Spinning up your own relay is as easy as...

portal serve --port 1337

The server log output is JSON. Super-recommended to run it through jq!

portal serve --port 1337 2>&1 | jq .

{
  "level": "info",
  "ts": "2023-02-28T02:57:45.310134+01:00",
  "caller": "rendezvous/server.go:77",
  "msg": "serving rendezvous server",
  "version": "v1.2.1",
  "address": ":1337"
}

More details about the connection process

Technical details

Building from source

The Makefile has everything you need.

To build a binary containing all commands, run:

PORTAL_VERSION=v1.x.x make build

It's important to include PORTAL_VERSION, which is a semantic version string. This is needed in order to validate senders and receivers against the relay, so transfers are disallowed when on different major versions, for instance.

Maintainers

Acknowledgements

a big thank you to magic-wormhole for greatly inspiring the concept of Portal.

nhooyr/websocket, shollz/pake, charmbracelet/bubbles, charmbracelet/bubbletea, charmbracelet/lipgloss, muesli/reflow, klauspost/pgzip and many, many more.

DigitalOcean <3

A special thanks to our sponsors DigitalOcean.

The public relay available for everyone to use is..