ffsend [WIP]

Easily and securely share files from the command line. A fully featured Firefox Send client.

Easily and securely share files and directories from the command line through a safe, private and encrypted link using a single simple command. Files are shared using the Send service and may be up to 2GB. Others are able to download these files with this tool, or through their web browser.

No demo visible here? View it on asciinema.

All files are always encrypted on the client, and secrets are never shared with the remote host. An optional password may be specified, and a default file lifetime of 1 (up to 20) download or 24 hours is enforced to ensure your stuff does not remain online forever. This provides a secure platform to share your files. Find out more about security here.

• Features
• Usage
• Requirements
• Install (Linux, macOS, Windows, Other OS/arch)
• Build
• Configuration and environment
• Security
• Help
• Special thanks
• License

The public Send service that is used as default host is provided by Mozilla.
This application is not affiliated with Mozilla, Firefox or Firefox Send in any way.

Note: this tool is currently in alpha

Features

• Fully featured and friendly command line tool
• Upload and download files and directories securely
• Always encrypted on the client
• Additional password protection, generation and configurable download limits
• File and directory archiving and extraction
• Built-in share URL shortener and QR code generator
• Supports old and new Firefox Send server versions
• History tracking your files for easy management
• Ability to use custom Send hosts
• Inspect or delete shared files
• Accurate error reporting
• Streaming encryption and uploading/downloading, very low memory footprint
• Intended for use in scripts without interaction
• Upcoming: Firefox Account integration (higher download counts, longer expiry times)

For a list of upcoming features and ideas, take a look at the current open issues over on GitLab.

Usage

Easily upload and download:

```bash

Simple upload

$ ffsend upload my-file.txt Share link: https://send.firefox.com/#sample-share-url

Advanced upload

- Specify a download limit of 20

- Enter a password to encrypt the file

- Archive the file before uploading

- Copy the shareable link to your clipboard

- Open the shareable link in your browser

$ ffsend upload --downloads 20 --password --archive --copy --open my-file.txt Password: ** Share link: https://send.firefox.com/#sample-share-url

Upload to your own host

$ ffsend u -h https://example.com/ my-file.txt Share link: https://example.com/#sample-share-url

Simple download

$ ffsend download https://send.firefox.com/#sample-share-url ```

Inspect remote files:

```bash

Check if a file exists

$ ffsend exists https://send.firefox.com/#sample-share-url Exists: yes

Fetch remote file info

$ ffsend info https://send.firefox.com/#sample-share-url ID: b087066715 Name: my-file.txt Size: 12 KiB MIME: text/plain Downloads: 0 of 10 Expiry: 18h2m (64928s) ```

Other commands include: ```bash

View your file history

$ ffsend history

LINK EXPIRY OWNER TOKEN

1 https://send.firefox.com/#sample-share-url 23h57m eea9f544f6d5df8a5afd 2 https://send.firefox.com/#other-sample-url 17h38m 1e9fef63fee3baaf54ce 3 https://example.com/#sample-share-url 37m30s 8eb28bc1bc85cfdab0e4

Change the password after uploading

$ ffsend password https://send.firefox.com/#sample-share-url Password: **

Delete a file

$ ffsend delete https://send.firefox.com/#sample-share-url ```

Use the --help flag, help subcommand, or see the help section for all available subcommands.

Requirements

• Linux, Windows or macOS
• A terminal :sunglasses:
• Internet connection for uploading and downloading
• Linux specific:
  • OpenSSL & CA certificates:
  • Ubuntu, Debian and derivatives: apt install openssl ca-certificates
  • Optional: xclip for clipboard support
  • Ubuntu, Debian and derivatives: apt install xclip
  • CentOS/Red Hat/openSUSE/Fedora: yum install xclip
  • Arch: pacman -S xclip
• Windows specific:
  • OpenSSL v1.1.0j: » Installer
• macOS specific:
  • OpenSSL: brew install openssl@1.1

Install

Because ffsend is still in alpha, only limited installation options are available right now.

Make sure you meet and install the requirements.

See the operating system specific instructions below: * Linux * macOS * Windows * Other OS or architecture

Linux (all distributions)

Using the snap package is recommended if supported.
Alternatively you may install it manually using the prebuilt binaries.

Only 64-bit (x86_64) packages and binaries are provided. For other architectures and configurations you may compile from source.

More packages options will be coming soon.

Linux: snap package

Note: The ffsend snap package is isolated, and can only access files in your home directory. Use a different installation option instead if you don't want this.

» ffsend bash snap install ffsend ffsend --help

Linux: Arch AUR packages

» ffsend (binary package)
» ffsend-git (compile from source package)

```bash yaourt -S ffsend

or

yay ffsend

or

aurget -S ffsend

or using any other AUR installer

ffsend --help ```

Linux: Prebuilt binaries

Check out the latest release assets for Linux binaries.
Use the ffsend-v*-linux-x64-static binary, to minimize the chance for issues.

Make sure you meet and install the requirements before you continue.

You must make the binary executable, and may want to move it into /usr/bin to make it easily executable:

```bash

Rename binary to ffsend

mv ./ffsend-* ./ffsend

Mark binary as executable

chmod a+x ./ffsend

Move binary into path, to make it easily usable

sudo mv ./ffsend /usr/local/bin/

ffsend --help ```

macOS

Currently only a prebuilt binary is available for macOS.

A homebrew package will be coming soon.

macOS: Prebuilt binaries

Check out the latest release assets for a macOS binary.

You must install openssl through homebrew which ffsend depends on.

Then, mark the downloaded binary as an executable. You then may want to move it into /usr/local/bin/ to make the ffsend command globally available:

```bash

Install openssl dependency

brew install openssl@1.1

Rename file to ffsend

mv ./ffsend-* ./ffsend

Mark binary as executable

chmod a+x ./ffsend

Move binary into path, to make it easily usable

sudo mv ./ffsend /usr/local/bin/

ffsend ```

Windows

Using the scoop package is recommended.
Alternatively you may install it manually using the prebuilt binaries.

If you're using the Windows Subsystem for Linux, it's highly recommended to install the prebuilt Linux binary instead.

Only 64-bit (x86_64) binaries are provided. For other architectures and configurations you may compile from source.

A chocolatey package along with an .msi installer will be coming soon.

Windows: scoop package

Make sure you've scoop installed, and run:

bash scoop install ffsend ffsend --help

Windows: Prebuilt binaries

Check out the latest release assets for Windows binaries. Use the ffsend-v*-windows-x64-static binary, to minimize the chance for issues.

You must install OpenSSL 1.1.0j which ffsend depends on. The installer for this can be found here: » Installer

You can use ffsend from the command line in the same directory: cmd .\ffsend.exe --help

To make it globally invokable as ffsend, you must make the binary available in your systems PATH. The easiest solution is to move it into System32: cmd move .\ffsend.exe C:\Windows\System32\ffsend.exe

Other OS or architecture

If your system runs Docker, you can use the docker image. There are currently no other binaries or packages available.

You can build the project from source instead.

Docker image

A Docker image is available for using ffsend running in a container. Mount a directory to /data, so it's accessible for ffsend in the container, and use the command as you normally would.

» timvisee/ffsend

```bash

Run container with no parameters

docker run --rm -it -v $PWD:/data timvisee/ffsend

Upload a file

docker run --rm -it -v $PWD:/data timvisee/ffsend upload my-file.txt

Download a file

docker run --rm -it -v $PWD:/data timvisee/ffsend download https://send.firefox.com/#sample-share-url

View help

docker run --rm -it -v $PWD:/data timvisee/ffsend help ```

Build

To build and install ffsend yourself, you meet the following requirements before proceeding:

Build requirements

• Regular requirements
• git
• rust v1.32 or higher (install using rustup)
• OpenSSL or LibreSSL libraries and headers must be available
  • Linux:
    • Ubuntu, Debian and derivatives: apt install build-essential cmake pkg-config libssl-dev
    • CentOS/Red Hat/openSUSE: yum install gcc gcc-c++ make cmake openssl-devel
    • Arch: pacman -S openssl base-devel
  • Gentoo: emerge -a dev-util/pkgconfig dev-util/cmake dev-libs/openssl
    • Fedora: dnf install gcc gcc-c++ make cmake openssl-devel
    • Or see instructions here
  • Windows:
    • See instructions here here
  • macOS:
    • Using brew: brew install cmake pkg-config openssl
    • Or see instructions here

Compile and install

Then, walk through one of the following steps to compile and install ffsend:

• Compile and install it directly from cargo:

  ```bash

  Compile and install from cargo

  cargo install ffsend -f

  Start using ffsend

  ffsend --help ```

• Or clone the repository and install it with cargo:

  ```bash

  Clone the project

  git clone https://github.com/timvisee/ffsend.git cd ffsend

  Compile and install

  cargo install -f

  Start using ffsend

  ffsend --help

  or run it directly from cargo

  cargo run --release -- --help ```

• Or clone the repository and invoke the binary directly (Linux/macOS):

  ```bash

  Clone the project

  git clone https://github.com/timvisee/ffsend.git cd ffsend

  Build the project (release version)

  cargo build --release

  Start using ffsend

  ./target/release/ffsend --help ```

Compile features / use flags

Different use flags are available for ffsend to toggle whether to include various features. The following features are available, some of which are enabled by default:

| Feature | Enabled | Description | | :------------: | :-----: | :--------------------------------------------------------- | | send2 | Default | Support for Firefox Send v2 servers | | send3 | Default | Support for Firefox Send v3 servers | | clipboard | Default | Support for copying links to the clipboard | | history | Default | Support for tracking files in history | | archive | Default | Support for archiving and extracting uploads and downloads | | qrcode | Default | Support for rendering a QR code for a share URL | | urlshorten | Default | Support for shortening share URLs | | infer-command| Default | Support for inferring subcommand based on binary name | | no-color | | Compile without color support in error and help messages |

To enable features during building or installation, specify them with --features <features...> when using cargo. You may want to disable default features first using --no-default-features. Here are some examples:

```bash

Defaults set of features with no-color, one of

cargo install --features no-color cargo build --release --features no-color

None of the features

cargo install --no-default-features

Only history and clipboard support

cargo install --no-default--features --features history,clipboard ```

For Windows systems it is recommended to provide the no-color flag, as color support in Windows terminals is flaky.

Configuration and environment

The following environment variables may be used to configure the following defaults. The CLI flag is shown along with it, to better describe the relation to command line arguments:

| Variable | CLI flag | Description | | :------------------------ | :----------------------------: | :-------------------------------- | | FFSEND_HISTORY | --history <FILE> | History file path | | FFSEND_HOST | --host <URL> | Upload host | | FFSEND_TIMEOUT | --timeout <SECONDS> | Request timeout (0 to disable) | | FFSEND_TRANSFER_TIMEOUT | --transfer-timeout <SECONDS> | Transfer timeout (0 to disable) | | FFSEND_API | --api <VERSION> | Server API version, - to lookup |

These environment variables may be used to toggle a flag, simply by making them available. The actual value of these variables is ignored, and variables may be empty.

| Variable | CLI flag | Description | | :------------------- | :-------------: | :--------------------------------- | | FFSEND_FORCE | --force | Force operations | | FFSEND_NO_INTERACT | --no-interact | No interaction for prompts | | FFSEND_YES | --yes | Assume yes for prompts | | FFSEND_INCOGNITO | --incognito | Incognito mode, don't use history | | FFSEND_OPEN | --open | Open share link of uploaded file | | FFSEND_ARCHIVE | --archive | Archive files uploaded | | FFSEND_EXTRACT | --extract | Extract files downloaded | | FFSEND_COPY | --copy | Copy share link to clipboard | | FFSEND_COPY_CMD | --copy-cmd | Copy download command to clipboard | | FFSEND_QUIET | --quiet | Log quiet information | | FFSEND_VERBOSE | --verbose | Log verbose information |

At this time, no configuration or dotfile file support is available. This will be something added in a later release.

Binary for each subcommand: ffput, ffget

ffsend supports having a separate binaries for a single subcommands, such as having ffput and ffget just for to upload and download using ffsend. This allows simple and direct commands like: bash ffput my-file.txt ffget https://send.firefox.com/#sample-share-url

This works for a predefined list of binary names: * ffput → ffsend upload ... * ffget → ffsend download ... * ffdel → ffsend delete ... * This list is defined in src/config.rs as INFER_COMMANDS

You can use the following methods to set up these single-command binaries: * Create a properly named symbolic link (recommended) * Create a properly named hard link * Clone the ffsend binary, and rename it

On Linux and macOS you can use the following command to set up symbolic links in the current directory: bash ln -s $(which ffsend) ./ffput ln -s $(which ffsend) ./ffget

Support for this feature is only available when ffsend is compiled with the infer-command feature flag. This is usually enabled by default. To verify support is available with an existing installation, make sure the feature is listed when invoking ffsend debug.

Security

In short; the ffsend tool and the Send service can be considered secure, and may be used to share sensitive files. Note though that the created share link for an upload will allow anyone to download the file. Make sure you don't share this link with unauthorized people.

For more detailed information on encryption, please read the rest of the paragraphs in this security section.

Note: even though the encryption method is considered secure, this ffsend tool does not provide any warranty in any way, shape or form for files that somehow got decrypted without proper authorization.

Client side encryption

ffsend uses client side encryption, to ensure your files are securely encrypted before they are uploaded to the remote host. This makes it impossible for third parties to decrypt your file without having the secret (encryption key). The file and its metadata are encrypted using 128-bit AES-GCM, and a HMAC SHA-256 signing key is used for request authentication. This is consistent with the encryption documentation provided by the Send service, ffsend is a tool for.

A detailed list on the encryption/decryption steps, and on what encryption is exactly used can be found here in the official service documentation.

Note on share link security

The encryption secret, that is used to decrypt the file when downloading, is included in the share URL behind the # (hash). This secret is never sent the remote server directly when using the share link in your browser. It would be possible however for a webpage to load some malicious JavaScript snippet that eventually steals the secret from the link once the page is loaded. Although this scenario is extremely unlikely, there are some options to prevent this from happening:

• Only use this ffsend tool, do not use the share link in your browser.
• Add additional protection by specifying a password using --password while uploading, or using the password subcommand afterwards.
• Host a secure Send service instance yourself.

A complete overview on encryption can be found in the official service documentation here.

Help

``` $ ffsend help

ffsend 0.2.35 Tim Visee Easily and securely share files from the command line. A fully featured Firefox Send client.

USAGE: ffsend [FLAGS] [OPTIONS] [SUBCOMMAND]

FLAGS: -f, --force Force the action, ignore warnings -h, --help Prints help information -i, --incognito Don't update local history for actions -I, --no-interact Not interactive, do not prompt -q, --quiet Produce output suitable for logging and automation -V, --version Prints version information -v, --verbose Enable verbose information and logging -y, --yes Assume yes for prompts

OPTIONS: -H, --history Use the specified history file [env: FFSENDHISTORY] -t, --timeout Request timeout (0 to disable) [env: FFSENDTIMEOUT] -T, --transfer-timeout Transfer timeout (0 to disable) [env: FFSENDTRANSFERTIMEOUT]

SUBCOMMANDS: upload Upload files [aliases: u, up] download Download files [aliases: d, down] debug View debug information [aliases: dbg] delete Delete a shared file [aliases: del] exists Check whether a remote file exists [aliases: e] help Prints this message or the help of the given subcommand(s) history View file history [aliases: h] info Fetch info about a shared file [aliases: i] parameters Change parameters of a shared file [aliases: params] password Change the password of a shared file [aliases: pass, p] version Determine the Send server version [aliases: v]

The public Send service that is used as default host is provided by Mozilla. This application is not affiliated with Mozilla, Firefox or Firefox Send. ```

Special thanks

• to Mozilla for building and hosting the amazing Firefox Send service
• to everyone involved with asciinema and svg-term for providing tools to make great visual demos
• to everyone involved in all crate dependencies used

License

This project is released under the GNU GPL-3.0 license. Check out the LICENSE file for more information.