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GNU AFFERO GENERAL PUBLIC LICENSE
Version 3, 19 November 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
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Preamble
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How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
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Also add information on how to contact you by electronic and paper mail.
If your software can interact with users remotely through a computer
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You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
<https://www.gnu.org/licenses/>.

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VERSION=0.1.0
BUILDDIR = .
_BUILDDIR = $(shell realpath $(BUILDDIR))/
build: build-server build-container build-extra
build-server:
cd server/ && go build -o $(_BUILDDIR)/docker4ssh
build-container: DEBUG=false
build-container:
@if $(DEBUG); then\
cd container/ && cargo build --target x86_64-unknown-linux-musl --target-dir $(_BUILDDIR) --bin configure;\
else\
cd container/ && cargo build --target x86_64-unknown-linux-musl --target-dir $(_BUILDDIR) --release --bin configure;\
fi
cp -rf $(_BUILDDIR)/x86_64-unknown-linux-musl/$(shell if $(DEBUG); then echo debug; else echo release; fi)/configure $(_BUILDDIR)
build-extra: SSHPASS:=$(shell LC_ALL=C tr -dc 'A-Za-z0-9!#$%&()*,-./:<=>?@[\]^_{}~' < /dev/urandom | head -c 18 ; echo)
build-extra:
if [ "$(_BUILDDIR)" != "$(shell realpath .)/" ]; then\
cp -rf LICENSE $(_BUILDDIR)/LICENSE;\
cp -rf man/ $(_BUILDDIR);\
fi
yes | ssh-keygen -t ed25519 -f $(_BUILDDIR)/docker4ssh.key -N "$(SSHPASS)" -b 4096 > /dev/null
cp -rf extra/docker4ssh.conf $(_BUILDDIR)
sed -i 's|Passphrase = ""|Passphrase = "$(SSHPASS)"|' $(_BUILDDIR)/docker4ssh.conf
cat extra/database.sql | sqlite3 $(_BUILDDIR)/docker4ssh.sqlite3
mkdir -p $(_BUILDDIR)/profile/ && cp -f extra/profile.conf $(_BUILDDIR)/profile/
optimize: optimize-server optimize-container
optimize-server:
strip $(_BUILDDIR)/docker4ssh
optimize-container:
strip $(_BUILDDIR)/configure
clean: clean-server clean-container clean-extra
clean-server:
rm -rf $(_BUILDDIR)/docker4ssh
clean-container:
rm -rf $(_BUILDDIR)/{x86_64-unknown-linux-musl,configure}
clean-extra:
rm -rf $(_BUILDDIR)/docker4ssh*
rm -rf $(_BUILDDIR)/man/
rm -rf $(_BUILDDIR)/profile/
DESTDIR=
PREFIX=/usr
install:
install -Dm755 $(_BUILDDIR)docker4ssh $(DESTDIR)$(PREFIX)/bin/docker4ssh
install -Dm644 $(_BUILDDIR)LICENSE $(DESTDIR)$(PREFIX)/share/licenses/docker4ssh/LICENSE
install -Dm644 $(_BUILDDIR)man/docker4ssh.1 $(DESTDIR)$(PREFIX)/share/man/man1/docker4ssh.1
install -Dm644 $(_BUILDDIR)man/docker4ssh.conf.5 $(DESTDIR)$(PREFIX)/share/man/man5/docker4ssh.conf.5
install -Dm644 $(_BUILDDIR)man/profile.conf.5 $(DESTDIR)$(PREFIX)/share/man/man5/profile.conf.5
install -Dm755 $(_BUILDDIR)configure $(DESTDIR)/etc/docker4ssh/configure
install -Dm775 $(_BUILDDIR)docker4ssh.conf $(DESTDIR)/etc/docker4ssh/docker4ssh.conf
install -Dm755 $(_BUILDDIR)docker4ssh.sqlite3 $(DESTDIR)/etc/docker4ssh/docker4ssh.sqlite3
install -Dm755 $(_BUILDDIR)docker4ssh.key $(DESTDIR)/etc/docker4ssh/docker4ssh.key
install -Dm644 $(_BUILDDIR)man/* -t $(DESTDIR)/etc/docker4ssh/man/
install -Dm644 $(_BUILDDIR)profile/* -t $(DESTDIR)/etc/docker4ssh/profile/
install -Dm644 $(_BUILDDIR)LICENSE $(DESTDIR)/etc/docker4ssh/LICENSE
uninstall:
rm -rf $(DESTDIR)/etc/docker4ssh/
rm -f $(DESTDIR)$(PREFIX)/bin/docker4ssh
rm -f $(DESTDIR)$(PREFIX)/share/man/man1/docker4ssh.1
rm -f $(DESTDIR)$(PREFIX)/share/man/man5/{docker4ssh,profile}.5
rm -f $(DESTDIR)$(PREFIX)/share/licenses/docker4ssh/LICENSE
release:
mkdir -p /tmp/docker4ssh-$(VERSION)-build/ /tmp/docker4ssh-$(VERSION)-release/
$(MAKE) BUILDDIR=/tmp/docker4ssh-$(VERSION)-build/ SSHPASS= build optimize
$(MAKE) BUILDDIR=/tmp/docker4ssh-$(VERSION)-build/ DESTDIR=/tmp/docker4ssh-$(VERSION)-release/ install
tar -C /tmp/docker4ssh-$(VERSION)-release/ -czf docker4ssh-$(VERSION).tar.gz .
RUNDIR=/tmp/docker4ssh
.PHONY run:
run:
$(MAKE) BUILDDIR=$(RUNDIR) SSHPASS= build
cd $(RUNDIR) && ./docker4ssh
develop: SERVERSUM = $(shell find server/ -type f -exec md5sum {} + | LC_ALL=C sort | md5sum | cut -d ' ' -f1)
develop: CONTAINERSUM = $(shell find container/src/ -type f -exec md5sum {} + | LC_ALL=C sort | md5sum | cut -d ' ' -f1)
develop: EXTRASUM = $(shell find extra/ -type f -exec md5sum {} + | LC_ALL=C sort | md5sum | cut -d ' ' -f1)
# there is maybe a better way to do this stuff but for the moment this works out
develop:
@if [ ! -d $(RUNDIR) ]; then\
$(MAKE) BUILDDIR=$(RUNDIR) DEBUG=true SSHPASS= build;\
if [[ $$? -ne 0 ]]; then exit 2; fi;\
echo -n $(SERVER) > $(RUNDIR)/SERVERSUM;\
echo -n $(CLIENTSUM) > $(RUNDIR)/CONTAINERSUM;\
echo -n $(EXTRASUM) > $(RUNDIR)/EXTRASUM;\
else\
if [ "$(shell cat $(RUNDIR)/SERVERSUM)" != "$(SERVERSUM)" ]; then\
$(MAKE) BUILDDIR=$(RUNDIR) clean-server;\
$(MAKE) BUILDDIR=$(RUNDIR) build-server;\
if [[ $$? -ne 0 ]]; then exit 2; fi;\
echo -n $(SERVERSUM) > $(RUNDIR)/SERVERSUM;\
fi;\
if [ "$(shell cat $(RUNDIR)/CONTAINERSUM)" != "$(CONTAINERSUM)" ]; then\
$(MAKE) BUILDDIR=$(RUNDIR) clean-container;\
$(MAKE) BUILDDIR=$(RUNDIR) DEBUG=true build-container;\
if [[ $$? -ne 0 ]]; then exit 2; fi;\
echo -n $(CONTAINERSUM) > $(RUNDIR)/CONTAINERSUM;\
fi;\
if [ "$(shell cat $(RUNDIR)/EXTRASUM)" != "$(EXTRASUM)" ]; then\
$(MAKE) BUILDDIR=$(RUNDIR) clean-extra;\
$(MAKE) BUILDDIR=$(RUNDIR) SSHPASS= build-extra;\
if [[ $$? -ne 0 ]]; then exit 2; fi;\
echo -n $(EXTRASUM) > $(RUNDIR)/EXTRASUM;\
fi;\
fi
cd $(RUNDIR) && LOGGING_LEVEL="debug" ./docker4ssh start

112
README.md Normal file
View File

@ -0,0 +1,112 @@
# docker4ssh - docker containers and more via ssh
**docker4ssh** is an ssh server that can create new docker containers and re-login into existing ones.
<p align="center">
<a href="https://github.com/ByteDream/docker4ssh">
<img src="https://img.shields.io/github/languages/code-size/ByteDream/docker4ssh?style=flat-square" alt="Code size">
</a>
<a href="https://github.com/ByteDream/docker4ssh/commits">
<img src="https://img.shields.io/github/last-commit/ByteDream/docker4ssh?style=flat-square" alt="Latest commit">
</a>
<a href="https://github.com/ByteDream/docker4ssh/releases/latest">
<img src="https://img.shields.io/github/downloads/ByteDream/docker4ssh/total?style=flat-square" alt="Download Badge">
</a>
<a href="https://github.com/ByteDream/docker4ssh/blob/master/LICENSE">
<img src="https://img.shields.io/github/license/ByteDream/docker4ssh?style=flat-square" alt="License">
</a>
<a href="https://github.com/ByteDream/docker4ssh/releases/latest">
<img src="https://img.shields.io/github/v/release/ByteDream/docker4ssh?style=flat-square" alt="Release">
</a>
<a href="https://discord.gg/gUWwekeNNg">
<img src="https://img.shields.io/discord/915659846836162561?label=discord&style=flat-square" alt="Discord">
</a>
</p>
<p align="center">
<a href="#-features">✨ Features</a>
·
<a href="#%EF%B8%8F-installation">⌨ Installation</a>
·
<a href="#-usage">🖋️ Usage</a>
·
<a href="#-license">⚖ License</a>
</p>
**Visit the [wiki](https://github.com/ByteDream/docker4ssh/wiki) to get more information and detailed usage instructions**
## ✨ Features
- Create containers by images (e.g. `ubuntu:21.04@server`)
- Create specific containers for specific usernames with [profiles](https://github.com/ByteDream/docker4ssh/wiki/Configuration-Files#profileconf)
- Containers are configurable from within
- Re-login into existing containers
- Full use of the docker api (unlike [docker2ssh](https://github.com/moul/ssh2docker), which uses the cli, which theoretically could cause code injection)
- Highly configurable [settings](https://github.com/ByteDream/docker4ssh/wiki/Configuration-Files#docker4sshconf)
## ⌨️ Installation
For every install method your OS **must** be linux and docker has to be installed.
- Download from the latest release (currently only x64 architecture supported)
- Download `docker4ssh-<version>.tar.gz` from the [latest release](https://github.com/ByteDream/docker4ssh/releases/latest)
- Install it
- Into your root directory (recommended)
```shell
$ sudo tar -xvzf docker4ssh-<version>.tar.gz -C /
```
- To the same directory
```shell
$ sudo tar -xvzf docker4ssh-<version>.tar.gz
```
- Building from source
Before start installing, make sure you have to following things ready:
- [Go](https://go.dev/) installed
- [Rust](https://www.rust-lang.org/) installed
- [Make](https://www.gnu.org/software/make/) installed - optional, but highly recommended since we use `make` in the further instructions
To install docker4ssh, just execute the following commands
```shell
$ git clone https://github.com/ByteDream/docker4ssh
$ cd docker4ssh
$ make install
```
- Install it from the [AUR](https://aur.archlinux.org/packages/docker4ssh/) (if you're using arch or an arch based distro)
```shell
$ yay -S docker4ssh
```
## 🖋 Usage
To start the docker4ssh server, simply type
```shell
$ docker4ssh start
```
The default port for the ssh server is 2222, if you want to change it take a look at the [config file](https://github.com/ByteDream/docker4ssh/wiki/docker4ssh.conf).
Dynamic profile generation is enabled by default, so you can start right away.
Type the following to generate a new ubuntu container and connect to it:
```shell
$ ssh -p 2222 ubuntu:latest@127.0.0.1
```
You will get a password prompt then where you can type in anything since by default any password is correct.
If you typed in a password, the docker container gets created and the ssh connection is "redirected" to the containers' tty:
```shell
ubuntu:latest@127.0.0.1's password:
┌───Container────────────────┐
│ Container ID: e0f3d48217da │
│ Network Mode: Host │
│ Configurable: true │
│ Run Level: User │
│ Exit After: │
│ Keep On Exit: false │
└──────────────Information───┘
root@e0f3d48217da:/#
```
For further information, visit the [wiki](https://github.com/ByteDream/docker4ssh/wiki).
## ⚖ License
This project is licensed under the GNU Affero General Public License v3.0 (AGPL-3.0) - see the [LICENSE](LICENSE) file for more details.

412
container/Cargo.lock generated Normal file
View File

@ -0,0 +1,412 @@
# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 3
[[package]]
name = "addr2line"
version = "0.17.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b9ecd88a8c8378ca913a680cd98f0f13ac67383d35993f86c90a70e3f137816b"
dependencies = [
"gimli",
]
[[package]]
name = "adler"
version = "1.0.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
[[package]]
name = "ansi_term"
version = "0.11.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
dependencies = [
"winapi",
]
[[package]]
name = "atty"
version = "0.2.14"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
dependencies = [
"hermit-abi",
"libc",
"winapi",
]
[[package]]
name = "autocfg"
version = "1.0.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
[[package]]
name = "backtrace"
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source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "321629d8ba6513061f26707241fa9bc89524ff1cd7a915a97ef0c62c666ce1b6"
dependencies = [
"addr2line",
"cc",
"cfg-if",
"libc",
"miniz_oxide",
"object",
"rustc-demangle",
]
[[package]]
name = "bitflags"
version = "1.3.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
[[package]]
name = "cc"
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[[package]]
name = "cfg-if"
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source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
[[package]]
name = "clap"
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checksum = "37e58ac78573c40708d45522f0d80fa2f01cc4f9b4e2bf749807255454312002"
dependencies = [
"ansi_term",
"atty",
"bitflags",
"strsim",
"textwrap",
"unicode-width",
"vec_map",
]
[[package]]
name = "docker4ssh"
version = "0.1.0"
dependencies = [
"failure",
"log",
"serde",
"serde_json",
"serde_repr",
"structopt",
]
[[package]]
name = "failure"
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source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d32e9bd16cc02eae7db7ef620b392808b89f6a5e16bb3497d159c6b92a0f4f86"
dependencies = [
"backtrace",
"failure_derive",
]
[[package]]
name = "failure_derive"
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checksum = "aa4da3c766cd7a0db8242e326e9e4e081edd567072893ed320008189715366a4"
dependencies = [
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"quote",
"syn",
"synstructure",
]
[[package]]
name = "gimli"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
name = "heck"
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source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6d621efb26863f0e9924c6ac577e8275e5e6b77455db64ffa6c65c904e9e132c"
dependencies = [
"unicode-segmentation",
]
[[package]]
name = "hermit-abi"
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checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
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]
[[package]]
name = "itoa"
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[[package]]
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[[package]]
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[[package]]
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"quote",
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"unicode-xid",
]
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[[package]]
name = "version_check"
version = "0.9.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5fecdca9a5291cc2b8dcf7dc02453fee791a280f3743cb0905f8822ae463b3fe"
[[package]]
name = "winapi"
version = "0.3.9"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
dependencies = [
"winapi-i686-pc-windows-gnu",
"winapi-x86_64-pc-windows-gnu",
]
[[package]]
name = "winapi-i686-pc-windows-gnu"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
[[package]]
name = "winapi-x86_64-pc-windows-gnu"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

25
container/Cargo.toml Normal file
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@ -0,0 +1,25 @@
[package]
name = "docker4ssh"
version = "0.1.0"
edition = "2021"
authors = ["ByteDream"]
repository = "https://github.com/ByteDream/docker4ssh"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[[bin]]
name = "configure"
path = "src/configure/main.rs"
[dependencies]
failure = "0.1"
log = "0.4"
structopt = "0.3"
serde = { version = "1.0", features = ["derive"]}
serde_json = "1.0"
serde_repr = "0.1"
[profile.release]
lto = true
opt-level = "z"
panic = "abort"

296
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use std::fmt::{Debug, format};
use std::net::TcpStream;
use std::os::unix::process::ExitStatusExt;
use std::process::{Command, ExitStatus};
use std::time::SystemTime;
use log::{info, warn};
use structopt::StructOpt;
use structopt::clap::AppSettings;
use crate::configure::cli::parser;
use crate::shared::api::api::API;
use crate::shared::api::request;
use crate::shared::api::request::{ConfigGetResponse, ConfigNetworkMode, ConfigPostRequest, ConfigRunLevel};
type Result<T> = std::result::Result<T, failure::Error>;
trait Execute {
fn execute(self, api: &mut API) -> Result<()>;
}
#[derive(StructOpt)]
#[structopt(
name = "configure",
about = "A command line wrapper to control docker4ssh containers from within them",
settings = &[AppSettings::ArgRequiredElseHelp]
)]
struct Opts {
#[structopt(short, long, global = true, help = "Verbose output")]
verbose: bool,
#[structopt(subcommand)]
commands: Option<Root>
}
#[derive(StructOpt)]
#[structopt(
name = "ping",
about = "Ping the control socket"
)]
struct Ping {}
impl Execute for Ping {
fn execute(self, api: &mut API) -> Result<()> {
let start = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH)?.as_nanos();
let result = request::PingRequest::new().request(api)?;
info!("Pong! Ping is {:.4}ms", ((result.received - start) as f64) / 1000.0 / 1000.0);
Ok(())
}
}
#[derive(StructOpt)]
#[structopt(
name = "error",
about = "Example error message sent from socket",
)]
struct Error {}
impl Execute for Error {
fn execute(self, api: &mut API) -> Result<()> {
request::ErrorRequest::new().request(api)?;
Ok(())
}
}
#[derive(StructOpt)]
#[structopt(
name = "info",
about = "Shows information about the current container",
)]
struct Info {}
impl Execute for Info {
fn execute(self, api: &mut API) -> Result<()> {
let result = request::InfoRequest:: new().request(api)?;
info!(concat!(
"\tContainer ID: {}"
), result.container_id);
Ok(())
}
}
#[derive(StructOpt)]
#[structopt(
name = "config",
about = "Get or set the behavior of the current container",
settings = &[AppSettings::ArgRequiredElseHelp]
)]
struct Config {
#[structopt(subcommand)]
commands: Option<ConfigCommands>
}
#[derive(StructOpt)]
enum ConfigCommands {
Get(ConfigGet),
Set(ConfigSet)
}
#[derive(StructOpt)]
#[structopt(
name = "get",
about = "Show the current container behavior"
)]
struct ConfigGet {}
impl Execute for ConfigGet {
fn execute(self, api: &mut API) -> Result<()> {
let response: ConfigGetResponse = request::ConfigGetRequest::new().request(api)?;
info!(concat!(
"\tNetwork Mode: {}\n",
"\tConfigurable: {}\n",
"\tRun Level: {}\n",
"\tStartup Information: {}\n",
"\tExit After: {}\n",
"\tKeep On Exit: {}"
), response.network_mode, response.configurable, response.run_level, response.startup_information, response.exit_after, response.keep_on_exit);
Ok(())
}
}
#[derive(StructOpt)]
#[structopt(
name = "set",
about = "Set the current container behavior",
settings = &[AppSettings::ArgRequiredElseHelp]
)]
struct ConfigSet {
#[structopt(long, help = "If the container should keep running even after the user exits", parse(try_from_str = parser::parse_network_mode))]
network_mode: Option<ConfigNetworkMode>,
#[structopt(long, help = "If the container should be configurable from within")]
configurable: Option<bool>,
#[structopt(long, help = "Set the container stop behavior", parse(try_from_str = parser::parse_config_run_level))]
run_level: Option<ConfigRunLevel>,
#[structopt(long, help = "If information about the container should be shown when a user connects")]
startup_information: Option<bool>,
#[structopt(long, help = "Process name after which the container should exit")]
exit_after: Option<String>,
#[structopt(long, help = "If the container should be not deleted after exit")]
keep_on_exit: Option<bool>
}
impl Execute for ConfigSet {
fn execute(self, api: &mut API) -> Result<()> {
let mut request = request::ConfigPostRequest::new();
if let Some(exit_after) = self.exit_after.as_ref() {
let program_runs = Command::new("pidof")
.arg("-s")
.arg(exit_after).status().unwrap().success();
if !program_runs {
warn!("NOTE: There is currently no process running with the name '{}'", exit_after);
}
}
request.body.network_mode = self.network_mode;
request.body.configurable = self.configurable;
request.body.run_level = self.run_level;
request.body.startup_information = self.startup_information;
request.body.exit_after = self.exit_after;
request.body.keep_on_exit = self.keep_on_exit;
request.request(api)?;
if let Some(keep_on_exit) = self.keep_on_exit {
if keep_on_exit {
if let Ok(auth) = request::AuthGetRequest::new().request(api) {
info!("To reconnect to this container, use the user '{}' for the ssh connection", &auth.user)
}
}
}
Ok(())
}
}
#[derive(StructOpt)]
#[structopt(
name = "auth",
about = "Get or set the container authentication",
settings = &[AppSettings::ArgRequiredElseHelp]
)]
struct Auth {
#[structopt(subcommand)]
commands: Option<AuthCommands>
}
#[derive(StructOpt)]
enum AuthCommands {
Get(AuthGet),
Set(AuthSet)
}
#[derive(StructOpt)]
#[structopt(
name = "get",
about = "Show the current username used for ssh authentication and if a password is set"
)]
struct AuthGet {}
impl Execute for AuthGet {
fn execute(self, api: &mut API) -> Result<()> {
let response = request::AuthGetRequest::new().request(api)?;
info!(concat!(
"\tUser: {}\n",
"\tHas Password: {}\n"
), response.user, response.has_password);
Ok(())
}
}
#[derive(StructOpt)]
#[structopt(
name = "set",
about = "Set the authentication settings",
settings = &[AppSettings::ArgRequiredElseHelp]
)]
struct AuthSet {
#[structopt(long, help = "The container username")]
user: Option<String>,
#[structopt(long, help = "The container password. If empty, the authentication gets removed")]
password: Option<String>
}
impl Execute for AuthSet {
fn execute(self, api: &mut API) -> Result<()> {
let mut request = request::AuthPostRequest::new();
request.body.user = self.user;
request.body.password = self.password.clone();
request.request(api)?;
if let Some(password) = self.password {
if password == "" {
warn!("No password was specified so the authentication got deleted")
}
}
Ok(())
}
}
#[derive(StructOpt)]
enum Root {
Auth(Auth),
Error(Error),
Info(Info),
Ping(Ping),
Config(Config)
}
pub fn cli(route: String) {
if let Some(subcommand) = Opts::from_args().commands {
let mut result: Result<()> = Ok(());
let mut api = API::new(route, String::new());
match subcommand {
Root::Auth(auth) => {
if let Some(subsubcommand) = auth.commands {
match subsubcommand {
AuthCommands::Get(auth_get) => {
result = auth_get.execute(&mut api)
}
AuthCommands::Set(auth_set) => {
result = auth_set.execute(&mut api)
}
}
}
},
Root::Error(error) => result = error.execute(&mut api),
Root::Info(info) => result = info.execute(&mut api),
Root::Ping(ping) => result = ping.execute(&mut api),
Root::Config(config) => {
if let Some(subsubcommand) = config.commands {
match subsubcommand {
ConfigCommands::Get(config_get) => {
result = config_get.execute(&mut api)
}
ConfigCommands::Set(config_set) => {
result = config_set.execute(&mut api)
}
}
}
}
}
if result.is_err() {
log::error!("{}", result.err().unwrap().to_string())
}
}
}

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mod cli;
pub mod parser;
pub use cli::cli;

23
container/src/configure/cli/parser.rs Normal file
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use std::f32::consts::E;
use std::fmt::format;
use crate::shared::api::request::{ConfigNetworkMode, ConfigRunLevel};
pub fn parse_network_mode(src: &str) -> Result<ConfigNetworkMode, String> {
match String::from(src).to_lowercase().as_str() {
"off" | "1" => Ok(ConfigNetworkMode::Off),
"full" | "2" => Ok(ConfigNetworkMode::Full),
"host" | "3" => Ok(ConfigNetworkMode::Host),
"docker" | "4" => Ok(ConfigNetworkMode::Docker),
"none" | "5" => Ok(ConfigNetworkMode::None),
_ => Err(format!("'{} is not a valid network mode. Choose from 'off', 'full', 'host', 'docker', 'none'", src))
}
}
pub fn parse_config_run_level(src: &str) -> Result<ConfigRunLevel, String> {
match String::from(src).to_lowercase().as_str() {
"user" | "1" => Ok(ConfigRunLevel::User),
"container" | "2" => Ok(ConfigRunLevel::Container),
"forever" | "3" => Ok(ConfigRunLevel::Forever),
_ => Err(format!("'{}' is not a valid run level. Choose from: 'user', 'container', 'forever'", src))
}
}

19
container/src/configure/main.rs Normal file
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use std::fs;
use std::net::TcpStream;
use std::os::unix::net::UnixStream;
use std::process::exit;
use log::{LevelFilter, trace, warn, info, error};
use docker4ssh::configure::cli;
use docker4ssh::shared::logging::init_logger;
fn main() {
init_logger(LevelFilter::Debug);
match fs::read_to_string("/etc/docker4ssh") {
Ok(route) => cli(route),
Err(e) => {
error!("Failed to read /etc/docker4ssh: {}", e.to_string());
exit(1);
}
}
}

3
container/src/configure/mod.rs Normal file
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pub mod cli;
pub use cli::cli;

2
container/src/lib.rs Normal file
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pub mod shared;
pub mod configure;

157
container/src/shared/api/api.rs Normal file
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use std::collections::HashMap;
use std::io::{Read, Write};
use std::net::TcpStream;
use log::Level::Error;
use serde::Deserialize;
pub type Result<T> = std::result::Result<T, failure::Error>;
pub struct API {
route: String,
host: String,
}
impl API {
pub const fn new(route: String, host: String) -> Self {
API {
route,
host,
}
}
pub fn new_connection(&mut self) -> Result<TcpStream> {
match TcpStream::connect(&self.route) {
Ok(stream) => Ok(stream),
Err(e) => Err(failure::format_err!("Failed to connect to {}: {}", self.route, e.to_string()))
}
}
pub fn request(&mut self, request: &Request) -> Result<APIResult> {
let mut connection = self.new_connection()?;
connection.write_all(request.as_string().as_bytes())?;
let mut buf: String = String::new();
connection.read_to_string(&mut buf).map_err(|e| failure::err_msg(e.to_string()))?;
Ok(APIResult::new(request, buf))
}
pub fn request_with_err(&mut self, request: &Request) -> Result<APIResult> {
let result = self.request(request)?;
if result.result_code >= 400 {
let err: APIError = result.body()?;
Err(failure::err_msg(format!("Error {}: {}", result.result_code, err.message)))
} else {
Ok(result)
}
}
}
#[derive(Deserialize)]
pub struct APIError {
message: String
}
pub struct APIResult {
// TODO: Store the whole request instead of only the path
request_path: String,
result_code: i32,
result_body: String
}
impl APIResult {
fn new(request: &Request, raw_response: String) -> Self {
APIResult {
request_path: request.path.clone(),
// TODO: Parse http body better
result_code: raw_response[9..12].parse().unwrap(),
result_body: raw_response.split_once("\r\n\r\n").unwrap().1.to_string()
}
}
pub fn path(self) -> String {
self.request_path
}
pub fn code(&self) -> i32 {
return self.result_code
}
pub fn has_body(&self) -> bool {
self.result_body.len() > 0
}
pub fn body<'a, T: Deserialize<'a>>(&'a self) -> Result<T> {
let result: T = serde_json::from_str(&self.result_body).map_err(|e| {
// checks if the error has a body and if so, return it
if self.has_body() {
let error: APIError = serde_json::from_str(&self.result_body).unwrap_or_else(|ee| {
APIError{message: format!("could not deserialize response: {}", e.to_string())}
});
failure::format_err!("Failed to call '{}': {}", self.request_path, error.message)
} else {
failure::format_err!("Failed to call '{}': {}", self.request_path, e.to_string())
}
})?;
Ok(result)
}
}
pub enum Method {
GET,
POST
}
pub struct Request {
method: Method,
path: String,
headers: HashMap<String, String>,
body: String,
}
impl Request {
pub fn new(path: String) -> Self {
Request{
method: Method::GET,
path,
headers: Default::default(),
body: "".to_string(),
}
}
pub fn set_method(&mut self, method: Method) -> &Self {
self.method = method;
self
}
pub fn set_path(&mut self, path: String) -> &Self {
self.path = path;
self
}
pub fn set_header(&mut self, field: &str, value: String) -> &Self {
self.headers.insert(String::from(field), value);
self
}
pub fn set_body(&mut self, body: String) -> &Self {
self.body = body;
self.headers.insert("Content-Length".to_string(), self.body.len().to_string());
self
}
pub fn as_string(&self) -> String {
let method;
match self.method {
Method::GET => method = "GET",
Method::POST => method = "POST"
}
let headers_as_string = self.headers.iter().map(|f| format!("{}: {}", f.0, f.1)).collect::<String>();
return format!("{} {} HTTP/1.0\r\n\
{}\r\n\r\n\
{}\r\n", method, self.path, headers_as_string, self.body)
}
}

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container/src/shared/api/mod.rs Normal file
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pub mod request;
pub mod api;

220
container/src/shared/api/request.rs Normal file
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use std::fmt::{Display, Formatter};
use serde::{Deserialize, Serialize};
use serde::de::Unexpected::Str;
use serde_repr::{Deserialize_repr, Serialize_repr};
use crate::shared::api::api::{API, Method, Request, Result};
use crate::shared::api::api::Method::POST;
#[derive(Deserialize)]
pub struct PingResponse {
pub received: u128
}
pub struct PingRequest {
request: Request
}
impl PingRequest {
pub fn new() -> Self {
PingRequest {
request: Request::new(String::from("/ping"))
}
}
pub fn request(&self, api: &mut API) -> Result<PingResponse> {
let result: PingResponse = api.request_with_err(&self.request)?.body()?;
Ok(result)
}
}
pub struct ErrorRequest {
request: Request
}
impl ErrorRequest {
pub fn new() -> Self {
ErrorRequest {
request: Request::new(String::from("/error"))
}
}
pub fn request(&self, api: &mut API) -> Result<()> {
api.request_with_err(&self.request)?.body()?;
// should never call Ok
Ok(())
}
}
#[derive(Deserialize)]
pub struct InfoResponse {
pub container_id: String
}
pub struct InfoRequest {
request: Request
}
impl InfoRequest {
pub fn new() -> Self {
InfoRequest{
request: Request::new(String::from("/info"))
}
}
pub fn request(&self, api: &mut API) -> Result<InfoResponse> {
let result: InfoResponse = api.request_with_err(&self.request)?.body()?;
Ok(result)
}
}
#[derive(Debug, Serialize_repr, Deserialize_repr)]
#[repr(u8)]
pub enum ConfigRunLevel {
User = 1,
Container = 2,
Forever = 3
}
impl Display for ConfigRunLevel {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
write!(f, "{:?}", self)
}
}
#[derive(Debug, Serialize_repr, Deserialize_repr)]
#[repr(u8)]
pub enum ConfigNetworkMode {
Off = 1,
Full = 2,
Host = 3,
Docker = 4,
None = 5
}
impl Display for ConfigNetworkMode {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
write!(f, "{:?}", self)
}
}
#[derive(Deserialize)]
pub struct ConfigGetResponse {
pub network_mode: ConfigNetworkMode,
pub configurable: bool,
pub run_level: ConfigRunLevel,
pub startup_information: bool,
pub exit_after: String,
pub keep_on_exit: bool
}
pub struct ConfigGetRequest {
request: Request
}
impl ConfigGetRequest {
pub fn new() -> ConfigGetRequest {
ConfigGetRequest{
request: Request::new(String::from("/config"))
}
}
pub fn request(&self, api: &mut API) -> Result<ConfigGetResponse> {
let result: ConfigGetResponse = api.request_with_err(&self.request)?.body()?;
Ok(result)
}
}
#[derive(Serialize)]
pub struct ConfigPostBody {
pub network_mode: Option<ConfigNetworkMode>,
pub configurable: Option<bool>,
pub run_level: Option<ConfigRunLevel>,
pub startup_information: Option<bool>,
pub exit_after: Option<String>,
pub keep_on_exit: Option<bool>
}
pub struct ConfigPostRequest {
request: Request,
pub body: ConfigPostBody
}
impl ConfigPostRequest {
pub fn new() -> ConfigPostRequest {
let mut request = Request::new(String::from("/config"));
request.set_method(Method::POST);
ConfigPostRequest {
request,
body: ConfigPostBody{
network_mode: None,
configurable: None,
run_level: None,
startup_information: None,
exit_after: None,
keep_on_exit: None
}
}
}
pub fn request(&mut self, api: &mut API) -> Result<()> {
self.request.set_body(serde_json::to_string(&self.body)?);
api.request_with_err(&self.request)?;
Ok(())
}
}
#[derive(Deserialize)]
pub struct AuthGetResponse {
pub user: String,
pub has_password: bool
}
pub struct AuthGetRequest {
request: Request
}
impl AuthGetRequest {
pub fn new() -> AuthGetRequest {
AuthGetRequest{
request: Request::new(String::from("/auth"))
}
}
pub fn request(&self, api: &mut API) -> Result<AuthGetResponse> {
let result: AuthGetResponse = api.request_with_err(&self.request)?.body()?;
Ok(result)
}
}
#[derive(Serialize)]
pub struct AuthPostBody {
pub user: Option<String>,
pub password: Option<String>
}
pub struct AuthPostRequest {
request: Request,
pub body: AuthPostBody
}
impl AuthPostRequest {
pub fn new() -> AuthPostRequest {
let mut request = Request::new(String::from("/auth"));
request.set_method(POST);
AuthPostRequest {
request,
body: AuthPostBody{
user: None,
password: None
}
}
}
pub fn request(&mut self, api: &mut API) -> Result<()> {
self.request.set_body(serde_json::to_string(&self.body)?);
api.request_with_err(&self.request)?;
Ok(())
}
}

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container/src/shared/logging/logger.rs Normal file
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use log::{info, Metadata, Record};
pub struct Logger;
impl log::Log for Logger {
fn enabled(&self, metadata: &Metadata) -> bool {
true
}
fn log(&self, record: &Record) {
if self.enabled(record.metadata()) {
println!("{}", record.args().to_string())
}
}
fn flush(&self) {
todo!()
}
}

11
container/src/shared/logging/mod.rs Normal file
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use log::{LevelFilter, SetLoggerError};
pub mod logger;
pub use logger::Logger;
static LOGGER: Logger = Logger;
pub fn init_logger(level: LevelFilter) -> Result<(), SetLoggerError> {
log::set_logger(&Logger).map(|()| log::set_max_level(level))
}

2
container/src/shared/mod.rs Normal file
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pub mod api;
pub mod logging;

47
examples/Dockerfile Normal file
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FROM golang:1.17 as server
WORKDIR /docker4ssh
COPY ["../", "."]
RUN apt update && \
apt install make sqlite3 && \
apt clean && \
apt autoremove && \
rm -rf /var/lib/apt/lists/*
RUN make BUILDDIR=build/ build-server
FROM rust:1.56 as client
WORKDIR /docker4ssh
COPY ../ .
RUN apt update && \
apt install make \
RUN make BUILDDIR=build/ build-client
FROM alpine:lastest as extra
WORKDIR /docker4ssh
COPY ../ .
RUN apk add make
RUN make BUILDDIR=build/ build-extra
FROM alpine:latest
WORKDIR /docker4ssh
COPY --from=server /docker4ssh/build/* .
COPY --from=client /docker4ssh/build/docker4ssh .
COPY --from=extra /docker4ssh/build/* .
ENTRYPOINT docker4ssh

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examples/docker-compose.yml Normal file
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version: '3'
services:
docker4ssh:
build: .
ports:
- "8642:8642"
volumes:
- "./docker4ssh.log.log:/docker4ssh/docker4ssh.log"
restart: unless-stopped
container_name: docker4ssh

14
examples/docker4ssh.service Normal file
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[Unit]
Description=
After=network.target docker.service
StartLimitBurst=3
StartLimitIntervalSec=60
[Service]
Type=simple
WorkingDirectory=/etc/docker4ssh
ExecStart=/usr/bin/docker4ssh
Restart=on-failure
[Install]
WantedBy=multi-user.target

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extra/database.sql Normal file
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create table if not exists auth
(
container_id text not null,
user text,
password blob
);
create unique index if not exists auth_container_id_uindex
on auth (container_id);
create table if not exists settings
(
container_id text not null,
network_mode enum default 3 not null,
configurable bool default 0 not null,
run_level enum default 1 not null,
startup_information bool default 1 not null,
exit_after text default '' not null,
keep_on_exit bool default 0 not null,
check (configurable IN (0, 1)),
check (keep_on_exit IN (0, 1)),
check (network_mode IN (1, 2, 3, 4, 5)),
check (run_level IN (1, 2, 3)),
check (startup_information IN (0, 1))
);
create unique index if not exists settings_container_id_uindex
on settings (container_id);

57
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[profile]
# the directory where profiles are stored
Dir = "./profile/"
# defalt settings for profiles
[profile.default]
Password = ""
NetworkMode = 3
Configurable = true
RunLevel = 1
StartupInformation = true
ExitAfter = ""
KeepOnExit = false
# settings for dynamic container creation
[profile.dynamic]
Enable = true
Password = ""
NetworkMode = 3
Configurable = true
RunLevel = 1
StartupInformation = true
ExitAfter = ""
KeepOnExit = false
[api]
Port = 8420
[api.configure]
Binary = "./configure"
Man = "./man/configure.1"
[ssh]
# the default ssh port. if blank, port 2222 will be used
Port = 2222
# path to the ssh private key. if blank, a random key will be generated
Keyfile = "./docker4ssh.key"
# password of the ssh private key
Passphrase = ""
[database]
# path to sqlite3 database file. there may be support for other databases in the future
Sqlite3File = "./docker4ssh.sqlite3"
[network.default]
Subnet = "172.69.0.0/16"
[network.isolate]
Subnet = "172.96.0.0/16"
[logging]
# the loglevel. available levels are: debug, info, warn, error, fatal
Level = "info"
ConsoleOutput = true
ConsoleError = true
OutputFile = "./docker4ssh.log"
ErrorFile = "./docker4ssh.log"

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#[chad]
# REQUIRED - (ssh) username. can be specified via regex.
# to use regex, put a 'regex:' in front of it
# Username = "chad"
# OPTIONAL - (ssh) password. can be specified via regex or as hash.
# to use regex, put a 'regex:' in front of it.
# if you want to specify a hash, put a 'sha1:', 'sha256:' or 'sha512:' at the begging of it
# Password = ""
# OPTIONAL - the network mode. must be one of the following: 1 (off) | 2 (isolate) | 3 (host) | 4 (docker) | 5 (none)
# NetworkMode = 3
# OPTIONAL - if the container should be configurable
# Configurable = true
# OPTIONAL - the container run behavior. must be one of the following: 1 (user) | 2 (container) 3 | (forever)
# RunLevel = 1
# OPTIONAL - if information should be shown about the container on startup
# StartupInformation = true
# OPTIONAL - a process name to exit after it has finished
# ExitAfter = ""
# OPTIONAL - not delete the container when it stops working
# KeepOnExit = false
# REQUIRED OR `Container` - the image to connect to
# Image = "archlinux:latest"
# REQUIRED OR `Image` - the container id to connect to
# Container = ""

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.TH configure 1 "December 13, 2021" configure "configure - manage docker4ssh container from within"
.SH NAME
docker4ssh - docker containers and more via ssh
.SH AUTH GET
This can only be used when calling \fIauth get\fR.
.br
It returns the current username (with which you can login to the container), if a password is set and if the container is reachable for other ssh connections.
.SH AUTH SET
This can only be used when calling \fIauth set\fR.
.TP
\fB--user\fR = user
The container username. It is used if you want to (re)connect to the container.
.TP
\fB--password\fR = password
The container password. If empty, the authentication gets removed.
.SH ERROR
This can only be used when calling \fIerror\fR.
.br
The subcommand only exists for testing purposes and always return a 400 error.
.SH INFO
This can only be used when calling \fIinfo\fR.
.br
It returns info about the container. Currently only the full container id is shown.
.SH PING
This can only be used when calling \fIping\fR.
.br
It returns the ping to the docker4ssh host with a nice little message :)
.SH CONFIG GET
This can only be used when calling \fIconfig get\fR.
.br
It returns the container configuration with the details NetworkMode, Configurable, RunLevel, ExitAfter and KeepOnExit (\fIprofile.conf (5)\fR).
.SH CONFIG SET
This can only be used when calling \fIconfig set\fR.
.TP
\fB--configurable\fI = true | false
If the container should be configurable (calling the binary this manual is about).
Once called this can only be reverted when the database is edited manually.
.TP
\fB--exit-after\fR = exit after
Process name to stop the container after the process ends.
.TP
\fB--keep-on-exit\fR = true | false
If the container should or should not be deleted when it stops working.
.TP
\fB--network-mode\fR = 1 | 2 | 3 | 4 | 5
This describes the behavior of the container's network
Must be one of the following:
1 (Off): Disable networking complete.
2 (Isolate): Isolates the container from the host and the host's network. Therefore, no configurations can be changed from within the container.
3 (Host): Default docker network.
4 (Docker): Same as \fI3\fR but the container is in a docker4ssh controlled subnet. This is useful to differ normal from docker4ssh containers.
5 (None): disables all isolation between the docker container and the host, so inside the network the container can act as the host. So it has access to the host's network directly.
.TP
\fB--run-level\fR = 1 | 2 | 3
This describes the container behavior when the user connection to a container is stopped.
Must be one of the following:
1 (User): The container stops working if no user is connected to it anymore.
2 (Container): The container runs when no user is connected \fIExitAfter\fR is specified.
3 (Forever): The container runs forever.
.SH BUGS
Discovered a bug? Well then it should get fixed as fast as possible. Feel free to open a new issue (https://github.com/ByteDream/crunchyroll-go/docker4ssh) or create a pull request (https://github.com/ByteDream/docker4ssh/pulls) on github.
.SH AUTHOR
Written by ByteDream (https://github.com/ByteDream)
.SH COPYRIGHT
Copyright (C) 2021 ByteDream
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.

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.TH docker4ssh 1 "December 13, 2021" docker4ssh "docker4ssh"
.SH NAME
docker4ssh - docker containers and more via ssh
.SH FILES
/etc/docker4ssh/docker4ssh.conf
The configuration file. See \fIdocker4ssh.conf(5)\fR for more information
/etc/docker4ssh/profile/*
Directory containing profiles. See \fIprofile.conf(5)\fR for more information
.SH SEE ALSO
docker4ssh.conf(5), profile.conf(5)
.SH BUGS
Discovered a bug? Well then it should get fixed as fast as possible. Feel free to open a new issue (https://github.com/ByteDream/crunchyroll-go/docker4ssh) or create a pull request (https://github.com/ByteDream/docker4ssh/pulls) on github.
.SH AUTHOR
Written by ByteDream (https://github.com/ByteDream)
.SH COPYRIGHT
Copyright (C) 2021 ByteDream
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.

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.TH docker4ssh.conf 5 "December 13, 2021" docker4ssh.conf "docker4ssh configuration file"
.SH SYNOPSIS
.TP
/etc/docker4ssh/docker4ssh.conf
.SH PROFILE
\fBDir\fR = /path/to/directory
.TP
Set the path to the directory where profiles are stored in
.SH PROFILE.DEFAULT
.TP
\fBPassword\fR = password
Default password for every connection.
This is used unless some other password was specified.
The password can be specified as plain text, regex or hash:
Regex: Put \fIregex:\fR in front of it. The regex must must be \fBgo\fR / \fBgolang\fR compatible. Visit \fIregex101.com\fR to validate your regex.
Hash: Put \fIsha1:\fR, \fIsha256:\fR or \fIsha512:\fR in front of it. Note that the hash must be hashed with the prefix algorithm.
.TP
\fBNetworkMode\fR = 1 | 2 | 3 | 4 | 5
Default network mode for every connection.
NetworkMode describes the behavior of the container's network
Must be one of the following:
1 (Off): Disable networking complete.
2 (Isolate): Isolates the container from the host and the host's network. Therefore, no configurations can be changed from within the container.
3 (Host): Default docker network.
4 (Docker): Same as \fI3\fR but the container is in a docker4ssh controlled subnet. This is useful to differ normal from docker4ssh containers.
5 (None): disables all isolation between the docker container and the host, so inside the network the container can act as the host. So it has access to the host's network directly.
.TP
\fBConfigurable\fR = true | false
Default configurable setting for every connection.
Configurable describes if the container should be configurable from within it. This means that the connect user is able to change all settings which are described here.
Must be true or false.
.TP
\fBRunLevel\fR = 1 | 2 | 3
Default run level for every connection.
RunRevel describes the container behavior when the user connection to a container is stopped.
Must be one of the following:
1 (User): The container stops working if no user is connected to it anymore.
2 (Container): The container runs when no user is connected \fIExitAfter\fR is specified.
3 (Forever): The container runs forever.
.br
Note that the container exits always, independent of its RunLevel, when the via \fIExitAfter\fR specified process ends.
.TP
\fBStartupInformation\fR = true | false
Default startup information setting for every connection.
StartupInformation specifies if information about the container (id, network mode, ...) should be shown when a user connects to it.
Must be true or false.
.TP
\fBExitAfter\fR = exit after
Default exit after process for every process.
ExitAfter is a process name after which end the container should stop running.
.TP
\fBKeepOnExit\fR = true | false
Default keep on exit setting for every connection.
KeepOnExit specifies if the container should be saved when it stops working.
Must be true or false.
.SH PROFILE.DYNAMIC
.TP
\fBEnable\fR = true | false
If dynamic container creation should be created.
.TP
\fBPassword\fR = password
See \fIPROFILE.DEFAULT.Password\fR
.TP
\fBNetworkMode\fR = 1 | 2 | 3 | 4 | 5
See \fIPROFILE.DEFAULT.NetworkMode\fR
.TP
\fBConfigurable\fR = true | false
See \fIPROFILE.DEFAULT.Configurable\fR
.TP
\fBRunLevel\fR = 1 | 2 | 3
See \fIPROFILE.DEFAULT.RunLevel\fR
.TP
\fBStartupInformation\fR = true | false
See \fIPROFILE.DEFAULT.StartupInformation\fR
.TP
\fBExitAfter\fR = exit after
See \fIPROFILE.DEFAULT.ExitAfter\fR
.TP
\fBKeepOnExit\fR = true | false
See \fIPROFILE.DEFAULT.KeepOnExit\fR
.SH API
.TP
\fBPort\fR = port
The api port for container clients to communicate with the server.
.TP
\fBConfigureBinary\fR = /path/to/configure/binary
Path to the configure binary which is used inside of containers to communicate with the host and configure itself.
.SH SSH
.TP
\fBPort\fR = port
Port of the ssh server to serve.
.TP
\fBKey\fR = /path/to/ssh/key
Path to the ssh private key for the ssh server.
To generate a new ssh key, use:
>>> ssh-keygen -t ed25519 -b 4096
.TP
\fBPassword\fR = password
Password for the ssh private key.
.SH DATABASE
.TP
\fBSqlite3File\fR = /path/to/sqlite3/file
Path of the database file where all container specific configurations are stored in.
.SH NETWORK
.TP
.SH NETWORK.DEFAULT
.TP
\fBSubnet\fR = subnet.ip
Ip and mask of the subnet which is used for \fINetworkMode 4 (Docker)\fR.
.TP
.SH NETWORK.ISOLATE
.TP
\fBSubnet\fR = subnet.ip
Ip and mask of the subnet which is used for \fINetworkMode 2 (Isolate)\fR.
.TP
.SH LOGGING
.TP
\fBLevel\fR = debug | info | warn | error | fatal
Logging level.
.TP
\fBConsoleOutput\fR = bool
If normal output should be logged to the console.
.TP
\fBConsoleError\fR = bool
If error output should be logged to the console.
.TP
\fBOutputFile\fR = /path/to/output/file
Path to the output file.
.TP
\fBErrorFile\fR = /path/to/error/file
Path to the error file.an
.SH SEE ALSO
docker4ssh(1), profile.conf(5)
.SH AUTHORS
Written by ByteDream (https://github.com/ByteDream)

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.TH docker4ssh.conf 5 "December 13, 2021" docker4ssh.conf "docker4ssh configuration file"
.SH SYNOPSIS
.TP
/etc/docker4ssh/profile/*
.SH SECTION NAME
.TP
A representative name for the profile
.SH KEYS
\fBUsername\fR = username
Username for this profile.
The username can be specified as plain text or regex:
Regex: Put \fIregex:\fR in front of it. The regex must must be \fBgo\fR / \fBgolang\fR compatible. Visit \fIregex101.com\fR to validate your regex.
.TP
.TP
\fBPassword\fR = password
Password for the profile.
The password can be specified as plain text, regex or hash:
Regex: Put \fIregex:\fR in front of it. The regex must must be \fBgo\fR / \fBgolang\fR compatible. Visit \fIregex101.com\fR to validate your regex.
Hash: Put \fIsha1:\fR, \fIsha256:\fR or \fIsha512:\fR in front of it. Note that the hash must be hashed with the prefix algorithm.
.TP
\fBNetworkMode\fR = 1 | 2 | 3 | 4 | 5
Default network mode for every connection.
NetworkMode describes the behavior of the container's network
Must be one of the following:
1 (Off): Disable networking complete.
2 (Isolate): Isolates the container from the host and the host's network. Therefore, no configurations can be changed from within the container.
3 (Host): Default docker network.
4 (Docker): Same as \fI3\fR but the container is in a docker4ssh controlled subnet. This is useful to differ normal from docker4ssh containers.
5 (None): disables all isolation between the docker container and the host, so inside the network the container can act as the host. So it has access to the host's network directly.
.TP
\fBConfigurable\fR = true | false
Default configurable setting for every connection.
Configurable describes if the container should be configurable from within it. This means that the connect user is able to change all settings which are described here.
Must be true or false.
.TP
\fBRunLevel\fR = 1 | 2 | 3
Default run level for every connection.
RunRevel describes the container behavior when the user connection to a container is stopped.
Must be one of the following:
1 (User): The container stops working if no user is connected to it anymore.
2 (Container): The container runs when no user is connected \fIExitAfter\fR is specified.
3 (Forever): The container runs forever.
.br
Note that the container exits always, independent of its RunLevel, when the via \fIExitAfter\fR specified process ends.
.TP
\fBStartupInformation\fR = true | false
Default startup information setting for every connection.
StartupInformation specifies if information about the container (id, network mode, ...) should be shown when a user connects to it.
Must be true or false.
.TP
\fBExitAfter\fR = exit after
Default exit after process for every process.
ExitAfter is a process name after which end the container should stop running.
.TP
\fBKeepOnExit\fR = true | false
Default keep on exit setting for every connection.
KeepOnExit specifies if the container should be saved when it stops working.
Must be true or false.
.SH EXAMPLE
[test]
.br
Username = "test"
.br
Image = "alpine:latest"
.SH SEE ALSO
docker4ssh(1), docker4ssh.conf(5)
.SH AUTHORS
Written by ByteDream (https://github.com/ByteDream)

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openapi: 3.0.1
info:
title: docker4ssh
description: Communicate between a container and the docker4ssh host
version: 0.1.0
license:
name: GNU Affero General Public License v3.0
url: https://www.gnu.org/licenses/agpl-3.0.txt
contact:
name: ByteDream
url: https://github.com/ByteDream
servers:
- url: 'unix:///var/run/docker4ssh.sock'
paths:
/ping:
get:
summary: Ping the server to see if it's latency and if it's alive
responses:
200:
description: OK
content:
application/json:
schema:
type: object
properties:
received:
type: integer
description: Unix nano timestamp when the message was received
/error:
get:
summary: Sends an error with code 400, only for test purposes
responses:
400:
description: Controlled bad return code
content:
application/json:
schema:
type: object
properties:
message:
type: string
description: Example error message
/info:
get:
summary: Get information about the current container
responses:
200:
description: OK
content:
application/json:
schema:
type: object
properties:
container_id:
type: string
description: ID of the container
/config:
get:
summary: Get the configuration of the current container
responses:
200:
description: OK
content:
application/json:
schema:
type: object
properties:
network_mode:
type: integer
enum:
- 1
- 2
- 3
- 4
- 5
description: The container network mode. Take a look at server/docker/docker.go for extended information
configurable:
type: boolean
description: If the container should be configurable from within
run_level:
type: integer
enum:
- 1
- 2
- 3
description: The container run level / behavior. Take a look at server/docker/docker.go for extended information
startup_information:
type: boolean
description: If information about the container should be shown when a user connects
exit_after:
type: string
description: The process name after the container exits
keep_on_exit:
type: boolean
description: If the container should be not deleted after exit
post:
summary: Set some config settings
requestBody:
required: true
content:
application/json:
schema:
type: object
properties:
network_mode:
type: integer
enum:
- 1
- 2
- 3
- 4
- 5
description: The container network mode. Take a look at server/docker/docker.go for extended information
configurable:
type: boolean
description: If the container should be configurable from within
run_level:
type: integer
enum:
- 1
- 2
- 3
description: The container run level / behavior. Take a look at server/docker/docker.go for extended information
startup_information:
type: boolean
description: If information about the container should be shown when a user connects
exit_after:
type: string
description: The process name after the container exits
keep_on_exit:
type: boolean
description: If the container should be not deleted after exit
responses:
200:
description: Settings was made
406:
description: One or more settings could not be changed
content:
application/json:
schema:
type: object
properties:
message:
type: string
description: Human readable description why the changes could not be made
rejected:
type: array
description: The rejected changes
items:
type: object
description: The rejected setting + a description why it couldn't be processed
properties:
name:
type: string
description: Name of the setting
description:
type: string
description: Description of the processing error
/auth:
get:
summary: Returns the current username used for ssh authentication and if a password is set
responses:
200:
description: OK
content:
application/json:
schema:
type: object
properties:
user:
type: string
description: Username
has_password:
type: boolean
description: If a password is set
404:
description: Auth does not exist
content:
application/json:
schema:
type: string
description: Message that the auth does not exists
post:
summary: Changes authentication for the current container
requestBody:
required: true
content:
application/json:
schema:
type: object
properties:
user:
type: string
description: The new username. Cannot be empty but nullable
password:
type: string
description: The new password. If empty or null, the complete authentication gets deleted
responses:
200:
description: Configuration was changed
406:
description: The given username was empty

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package api
import (
"bytes"
"docker4ssh/config"
"docker4ssh/ssh"
"encoding/json"
"fmt"
"go.uber.org/zap"
"io"
"io/ioutil"
"net"
"net/http"
"strings"
)
type EndpointHandler struct {
http.Handler
auth bool
get func(http.ResponseWriter, *http.Request, *ssh.User) (interface{}, int)
post func(http.ResponseWriter, *http.Request, *ssh.User) (interface{}, int)
}
func (h *EndpointHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
ip := strings.Split(r.RemoteAddr, ":")[0]
zap.S().Infof("User connected to api with remote address %s", ip)
w.Header().Add("Content-Type", "application/json")
user := ssh.GetUser(ip)
// checks if auth should be checked and if so and no user could be found, response an error
if h.auth && user == nil {
zap.S().Errorf("Could not find api user with ip %s", ip)
json.NewEncoder(w).Encode(APIError{Message: "unauthorized"})
return
} else if user != nil {
zap.S().Debugf("API ip %s is %s", ip, user.ID)
}
raw := bytes.Buffer{}
if r.ContentLength > 0 {
io.Copy(&raw, r.Body)
defer r.Body.Close()
if !json.Valid(raw.Bytes()) {
zap.S().Errorf("API user %s sent invalid body", ip)
w.WriteHeader(http.StatusNotAcceptable)
json.NewEncoder(w).Encode(APIError{Message: "invalid body"})
return
}
r.Body = ioutil.NopCloser(&raw)
}
zap.S().Debugf("API user %s request - \"%s %s %s\" \"%s\" \"%s\"", ip, r.Method, r.URL.Path, r.Proto, r.UserAgent(), raw.String())
var response interface{}
var code int
switch r.Method {
case http.MethodGet:
if h.get != nil {
response, code = h.get(w, r, user)
}
case http.MethodPost:
if h.post != nil {
response, code = h.post(w, r, user)
}
}
if response == nil && code == 0 {
zap.S().Infof("API user %s sent invalid method: %s", ip, r.Method)
response = APIError{Message: fmt.Sprintf("invalid method '%s'", r.Method)}
code = http.StatusConflict
} else {
zap.S().Infof("API user %s issued %s successfully", ip, r.URL.Path)
}
w.WriteHeader(code)
if response != nil {
json.NewEncoder(w).Encode(response)
}
}
func ServeAPI(config *config.Config) (errChan chan error, closer func() error) {
errChan = make(chan error, 1)
mux := http.NewServeMux()
mux.Handle("/ping", &EndpointHandler{
get: PingGet,
})
mux.Handle("/error", &EndpointHandler{
get: ErrorGet,
})
mux.Handle("/info", &EndpointHandler{
get: InfoGet,
auth: true,
})
mux.Handle("/config", &EndpointHandler{
get: ConfigGet,
post: ConfigPost,
auth: true,
})
mux.Handle("/auth", &EndpointHandler{
get: AuthGet,
post: AuthPost,
auth: true,
})
listener, err := net.Listen("tcp", fmt.Sprintf(":%d", config.Api.Port))
if err != nil {
errChan <- err
return
}
go func() {
errChan <- http.Serve(listener, mux)
}()
return errChan, listener.Close
}

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package api
import (
"docker4ssh/database"
"docker4ssh/ssh"
"encoding/json"
"go.uber.org/zap"
"golang.org/x/crypto/bcrypt"
"net/http"
)
type authGetResponse struct {
User string `json:"user"`
HasPassword bool `json:"has_password"`
}
func AuthGet(w http.ResponseWriter, r *http.Request, user *ssh.User) (interface{}, int) {
auth, ok := database.GetDatabase().GetAuthByContainer(user.Container.FullContainerID)
if ok {
return authGetResponse{
User: *auth.User,
HasPassword: auth.Password != nil,
}, http.StatusOK
} else {
return APIError{Message: "no auth is set"}, http.StatusNotFound
}
}
type authPostRequest struct {
User *string `json:"user"`
Password *string `json:"password"`
}
func AuthPost(w http.ResponseWriter, r *http.Request, user *ssh.User) (interface{}, int) {
var request authPostRequest
json.NewDecoder(r.Body).Decode(&request)
defer r.Body.Close()
db := database.GetDatabase()
auth, _ := db.GetAuthByContainer(user.Container.FullContainerID)
if request.User != nil {
if *request.User == "" {
return APIError{Message: "new username cannot be empty"}, http.StatusNotAcceptable
}
if err := db.SetAuth(user.Container.FullContainerID, database.Auth{
User: request.User,
}); err != nil {
zap.S().Errorf("Error while updating user for user %s: %v", user.ID, err)
return APIError{Message: "failed to process user"}, http.StatusInternalServerError
}
zap.S().Infof("Updated password for %s", user.Container.ContainerID)
}
if request.Password != nil && *request.Password == "" {
if err := db.DeleteAuth(user.Container.FullContainerID); err != nil {
zap.S().Errorf("Error while deleting auth for user %s: %v", user.ID, err)
return APIError{Message: "failed to delete auth"}, http.StatusInternalServerError
}
zap.S().Infof("Deleted authenticiation for %s", user.Container.ContainerID)
} else if request.Password != nil {
pwd, err := bcrypt.GenerateFromPassword([]byte(*request.Password), bcrypt.DefaultCost)
if err != nil {
zap.S().Errorf("Error while updating password for user %s: %v", user.ID, err)
return APIError{Message: "failed to process password"}, http.StatusInternalServerError
}
var username string
if auth.User == nil {
username = user.Container.FullContainerID
} else {
username = *auth.User
}
if err = db.SetAuth(user.Container.FullContainerID, database.NewUnsafeAuth(username, pwd)); err != nil {
return APIError{Message: "failed to update authentication"}, http.StatusInternalServerError
}
zap.S().Infof("Updated password for %s", user.Container.ContainerID)
}
return nil, http.StatusOK
}

124
server/api/config.go Normal file
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package api
import (
"context"
"docker4ssh/docker"
"docker4ssh/ssh"
"encoding/json"
"fmt"
"go.uber.org/zap"
"net/http"
"reflect"
"strings"
)
type configGetResponse struct {
NetworkMode docker.NetworkMode `json:"network_mode"`
Configurable bool `json:"configurable"`
RunLevel docker.RunLevel `json:"run_level"`
StartupInformation bool `json:"startup_information"`
ExitAfter string `json:"exit_after"`
KeepOnExit bool `json:"keep_on_exit"`
}
func ConfigGet(w http.ResponseWriter, r *http.Request, user *ssh.User) (interface{}, int) {
config := user.Container.Config()
return configGetResponse{
config.NetworkMode,
config.Configurable,
config.RunLevel,
config.StartupInformation,
config.ExitAfter,
config.KeepOnExit,
}, http.StatusOK
}
type configPostRequest configGetResponse
var configPostRequestLookup, _ = structJsonLookup(configPostRequest{})
type configPostResponse struct {
Message string `json:"message"`
Rejected []configPostResponseRejected `json:"rejected"`
}
type configPostResponseRejected struct {
Name string `json:"name"`
Description string `json:"description"`
}
func ConfigPost(w http.ResponseWriter, r *http.Request, user *ssh.User) (interface{}, int) {
var requestBody map[string]interface{}
json.NewDecoder(r.Body).Decode(&requestBody)
defer r.Body.Close()
var change bool
var response configPostResponse
updatedConfig := user.Container.Config()
for k, v := range requestBody {
if v == nil {
continue
}
kind, ok := configPostRequestLookup[k]
if !ok {
response.Rejected = append(response.Rejected, configPostResponseRejected{
Name: k,
Description: fmt.Sprintf("name / field %s does not exist", k),
})
} else {
valueKind := reflect.TypeOf(v).Kind()
if valueKind != kind && valueKind == reflect.Float64 && kind == reflect.Int {
valueKind = reflect.Int
}
if valueKind != kind {
response.Rejected = append(response.Rejected, configPostResponseRejected{
Name: k,
Description: fmt.Sprintf("value should be type %s, got type %s", kind, valueKind),
})
}
change = true
switch k {
case "network_mode":
updatedConfig.NetworkMode = docker.NetworkMode(v.(float64))
case "configurable":
updatedConfig.Configurable = v.(bool)
case "run_level":
updatedConfig.RunLevel = docker.RunLevel(v.(float64))
case "startup_information":
updatedConfig.StartupInformation = v.(bool)
case "exit_after":
updatedConfig.ExitAfter = v.(string)
case "keep_on_exit":
updatedConfig.KeepOnExit = v.(bool)
}
}
}
if len(response.Rejected) > 0 {
var arr []string
for _, rejected := range response.Rejected {
arr = append(arr, rejected.Name)
}
if len(response.Rejected) == 1 {
response.Message = fmt.Sprintf("1 invalid configuration was found: %s", strings.Join(arr, ", "))
return response, http.StatusNotAcceptable
} else if len(response.Rejected) > 1 {
response.Message = fmt.Sprintf("%d invalid configurations were found: %s", len(response.Rejected), strings.Join(arr, ", "))
return response, http.StatusNotAcceptable
}
} else if change {
if err := user.Container.UpdateConfig(context.Background(), updatedConfig); err != nil {
zap.S().Errorf("Error while updating config for API user %s: %v", user.ID, err)
response.Message = "Internal error while updating the config"
return response, http.StatusInternalServerError
}
}
return nil, http.StatusOK
}

12
server/api/error.go Normal file
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package api
import (
"docker4ssh/ssh"
"net/http"
)
type errorGetResponse APIError
func ErrorGet(w http.ResponseWriter, r *http.Request, user *ssh.User) (interface{}, int) {
return APIError{Message: "Example error message"}, http.StatusBadRequest
}

16
server/api/info.go Normal file
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package api
import (
"docker4ssh/ssh"
"net/http"
)
type infoGetResponse struct {
ContainerID string `json:"container_id"`
}
func InfoGet(w http.ResponseWriter, r *http.Request, user *ssh.User) (interface{}, int) {
return infoGetResponse{
ContainerID: user.Container.FullContainerID,
}, http.StatusOK
}

15
server/api/ping.go Normal file
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package api
import (
"docker4ssh/ssh"
"net/http"
"time"
)
type pingGetResponse struct {
Received int64 `json:"received"`
}
func PingGet(w http.ResponseWriter, r *http.Request, user *ssh.User) (interface{}, int) {
return pingGetResponse{Received: time.Now().UnixNano()}, http.StatusOK
}

35
server/api/utils.go Normal file
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package api
import (
"fmt"
"reflect"
"strings"
)
type APIError struct {
Message string `json:"message"`
}
func structJsonLookup(v interface{}) (map[string]reflect.Kind, error) {
rt := reflect.TypeOf(v)
if rt.Kind() != reflect.Struct {
return nil, fmt.Errorf("given interface is not a struct")
}
lookup := make(map[string]reflect.Kind)
for i := 0; i < rt.NumField(); i++ {
field := rt.Field(i)
name := strings.Split(field.Tag.Get("json"), ",")[0]
value := field.Type.Kind()
if field.Type.Kind() == reflect.Struct {
value = reflect.Map
}
lookup[name] = value
}
return lookup, nil
}

0
server/build/docker4ssh Normal file
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18
server/cmd/cmd.go Normal file
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package cmd
import (
"fmt"
"github.com/spf13/cobra"
"os"
)
var rootCmd = &cobra.Command{
Use: "docker4ssh",
Short: "Docker containers and more via ssh",
}
func Execute() {
if err := rootCmd.Execute(); err != nil {
fmt.Fprintf(os.Stderr, "%v", err)
}
}

160
server/cmd/start.go Normal file
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package cmd
import (
"docker4ssh/api"
c "docker4ssh/config"
"docker4ssh/database"
"docker4ssh/docker"
"docker4ssh/logging"
"docker4ssh/ssh"
"docker4ssh/validate"
"fmt"
"github.com/spf13/cobra"
"go.uber.org/zap"
"os"
"os/signal"
"strings"
"syscall"
"time"
)
var startCmd = &cobra.Command{
Use: "start",
Short: "Starts the docker4ssh server",
Args: cobra.MaximumNArgs(0),
PreRunE: func(cmd *cobra.Command, args []string) error {
return preStart()
},
Run: func(cmd *cobra.Command, args []string) {
start()
},
}
func preStart() error {
if !docker.IsRunning() {
return fmt.Errorf("docker daemon is not running")
}
cli, err := docker.InitCli()
if err != nil {
return err
}
config, err := c.InitConfig(true)
if err != nil {
return err
}
validator := validate.NewConfigValidator(cli, false, config)
if result := validator.ValidateLogging(); !result.Ok() {
return fmt.Errorf(result.String())
}
level := zap.NewAtomicLevel()
level.UnmarshalText([]byte(config.Logging.Level))
var outputFiles, errorFiles []string
if config.Logging.ConsoleOutput {
outputFiles = append(outputFiles, "/dev/stdout")
}
if config.Logging.OutputFile != "" {
outputFiles = append(outputFiles, config.Logging.OutputFile)
}
if config.Logging.ConsoleError {
errorFiles = append(errorFiles, "/dev/stderr")
}
if config.Logging.ErrorFile != "" {
errorFiles = append(errorFiles, config.Logging.ErrorFile)
}
logging.InitLogging(level, outputFiles, errorFiles)
if result := validator.Validate(); !result.Ok() {
return fmt.Errorf(result.String())
}
c.SetConfig(config)
db, err := database.NewSqlite3Connection(config.Database.Sqlite3File)
if err != nil {
zap.S().Fatalf("Failed to initialize database: %v", err)
}
database.SetDatabase(db)
return nil
}
func start() {
config := c.GetConfig()
if config.SSH.Passphrase == "" {
zap.S().Warn("YOU HAVE AN EMPTY PASSPHRASE WHICH IS INSECURE, SUGGESTING CREATING A NEW SSH KEY WITH A PASSPHRASE.\n" +
"IF YOU'RE DOWNLOADED THIS VERSION FROM THE RELEASES (https://github.com/ByteDream/docker4ssh/releases/latest), MAKE SURE TO CHANGE YOUR SSH KEY IMMEDIATELY BECAUSE ANYONE COULD DECRYPT THE SSH SESSION!!\n" +
"USE 'ssh-keygen -t ed25519 -f /etc/docker4ssh/docker4ssh.key -b 4096' AND UPDATE THE PASSPHRASE IN /etc/docker4ssh/docker4ssh.conf UNDER ssh.Passphrase")
}
serverConfig, err := ssh.NewSSHConfig(config)
if err != nil {
zap.S().Fatalf("Failed to initialize ssh server config: %v", err)
}
sshErrChan, sshCloser := ssh.StartServing(config, serverConfig)
zap.S().Infof("Started ssh serving on port %d", config.SSH.Port)
apiErrChan, apiCloser := api.ServeAPI(config)
zap.S().Infof("Started api serving on port %d", config.Api.Port)
done := make(chan struct{})
sig := make(chan os.Signal)
signal.Notify(sig, syscall.SIGUSR1, os.Interrupt, os.Kill, syscall.SIGINT, syscall.SIGTERM)
go func() {
s := <-sig
if sshCloser != nil {
sshCloser()
}
if apiCloser != nil {
apiCloser()
}
database.GetDatabase().Close()
if s != syscall.SIGUSR1 {
// Errorf is called here instead of Fatalf because the original exit signal should be kept to exit with it later
zap.S().Errorf("(FATAL actually) received abort signal %d: %s", s.(syscall.Signal), strings.ToUpper(s.String()))
os.Exit(int(s.(syscall.Signal)))
}
done <- struct{}{}
}()
select {
case err = <-sshErrChan:
case err = <-apiErrChan:
}
if err != nil {
zap.S().Errorf("Failed to start working: %v", err)
sig <- os.Interrupt
} else {
select {
case <-sig:
if err != nil {
zap.S().Errorf("Serving failed due error: %v", err)
} else {
zap.S().Info("Serving stopped")
}
default:
sig <- syscall.SIGUSR1
}
}
select {
case <-done:
case <-time.After(5 * time.Second):
// if the timeout of 5 seconds expires, forcefully exit
os.Exit(int(syscall.SIGKILL))
}
}
func init() {
rootCmd.AddCommand(startCmd)
}

159
server/cmd/validate.go Normal file
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package cmd
import (
c "docker4ssh/config"
"docker4ssh/docker"
"docker4ssh/validate"
"fmt"
"github.com/docker/docker/client"
"github.com/spf13/cobra"
"os"
"path/filepath"
"strings"
)
var cli *client.Client
var validateCmd = &cobra.Command{
Use: "validate",
Short: "Validate docker4ssh specific files (config / profile files)",
PersistentPreRunE: func(cmd *cobra.Command, args []string) (err error) {
cli, err = docker.InitCli()
return err
},
}
var validateStrictFlag bool
var validateConfigCmd = &cobra.Command{
Use: "config [files]",
Short: "Validate a docker4ssh config file",
RunE: func(cmd *cobra.Command, args []string) error {
return validateConfig(args)
},
}
var validateConfigFileFlag string
var validateProfileCmd = &cobra.Command{
Use: "profile [files]",
Short: "Validate docker4ssh profile files",
RunE: func(cmd *cobra.Command, args []string) error {
return validateProfile(args)
},
}
func validateConfig(args []string) error {
config, err := c.LoadConfig(validateConfigFileFlag, false)
if err != nil {
return err
}
validator := validate.NewConfigValidator(cli, validateStrictFlag, config)
var result *validate.ValidatorResult
if len(args) == 0 {
result = validator.Validate()
} else {
var validateFuncs []func() *validate.ValidatorResult
for _, arg := range args {
switch strings.ToLower(arg) {
case "profile":
validateFuncs = append(validateFuncs, validator.ValidateProfile)
case "api":
validateFuncs = append(validateFuncs, validator.ValidateAPI)
case "ssh":
validateFuncs = append(validateFuncs, validator.ValidateSSH)
case "database":
validateFuncs = append(validateFuncs, validator.ValidateDatabase)
case "network":
validateFuncs = append(validateFuncs, validator.ValidateNetwork)
case "logging":
validateFuncs = append(validateFuncs, validator.ValidateLogging)
default:
return fmt.Errorf("'%s' is not a valid config section", arg)
}
}
var errors []*validate.ValidateError
for _, validateFunc := range validateFuncs {
errors = append(errors, validateFunc().Errors...)
}
result = &validate.ValidatorResult{
Strict: validateStrictFlag,
Errors: errors,
}
}
fmt.Println(result.String())
if len(result.Errors) > 0 {
os.Exit(1)
}
return nil
}
func validateProfile(args []string) error {
var files []string
if len(args) == 0 {
args = append(args, "/etc/docker4ssh/profile")
}
for _, arg := range args {
stat, err := os.Stat(arg)
if os.IsNotExist(err) {
return fmt.Errorf("file %s does not exist: %v", arg, err)
}
if stat.IsDir() {
dir, err := os.ReadDir(arg)
if err != nil {
return fmt.Errorf("failed to read directory %s: %v", arg, err)
}
for _, file := range dir {
path, err := filepath.Abs(file.Name())
if err != nil {
return err
}
files = append(files, path)
}
}
}
var profiles c.Profiles
for _, file := range files {
p, err := c.LoadProfileFile(file, c.HardcodedPreProfile())
if err != nil {
return err
}
profiles = append(profiles, p...)
}
var errors []*validate.ValidateError
for _, profile := range profiles {
errors = append(errors, validate.NewProfileValidator(cli, validateStrictFlag, profile).Validate().Errors...)
}
result := validate.ValidatorResult{
Strict: validateStrictFlag,
Errors: errors,
}
fmt.Println(result.String())
return nil
}
func init() {
rootCmd.AddCommand(validateCmd)
validateCmd.PersistentFlags().BoolVarP(&validateStrictFlag, "strict", "s", false, "If the check should be strict")
validateCmd.AddCommand(validateConfigCmd)
validateConfigCmd.Flags().StringVarP(&validateConfigFileFlag, "file", "f", "/etc/docker4ssh/docker4ssh.conf", "Specify a file to check")
validateCmd.AddCommand(validateProfileCmd)
}

189
server/config/config.go Normal file
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package config
import (
"fmt"
"github.com/BurntSushi/toml"
"os"
"path/filepath"
"reflect"
"strconv"
"strings"
)
var globConfig *Config
type Config struct {
Profile struct {
Dir string `toml:"Dir"`
Default struct {
Password string `toml:"Password"`
NetworkMode int `toml:"NetworkMode"`
Configurable bool `toml:"Configurable"`
RunLevel int `toml:"RunLevel"`
StartupInformation bool `toml:"StartupInformation"`
ExitAfter string `toml:"ExitAfter"`
KeepOnExit bool `toml:"KeepOnExit"`
} `toml:"default"`
Dynamic struct {
Enable bool `toml:"Enable"`
Password string `toml:"Password"`
NetworkMode int `toml:"NetworkMode"`
Configurable bool `toml:"Configurable"`
RunLevel int `toml:"RunLevel"`
StartupInformation bool `toml:"StartupInformation"`
ExitAfter string `toml:"ExitAfter"`
KeepOnExit bool `toml:"KeepOnExit"`
} `toml:"dynamic"`
} `toml:"profile"`
Api struct {
Port uint16 `toml:"Port"`
Configure struct {
Binary string `toml:"Binary"`
Man string `toml:"Man"`
} `toml:"configure"`
} `toml:"api"`
SSH struct {
Port uint16 `toml:"Port"`
Keyfile string `toml:"Keyfile"`
Passphrase string `toml:"Passphrase"`
} `toml:"ssh"`
Database struct {
Sqlite3File string `toml:"Sqlite3File"`
} `toml:"Database"`
Network struct {
Default struct {
Subnet string `toml:"Subnet"`
} `toml:"default"`
Isolate struct {
Subnet string `toml:"Subnet"`
} `toml:"isolate"`
} `toml:"network"`
Logging struct {
Level string `toml:"Level"`
OutputFile string `toml:"OutputFile"`
ErrorFile string `toml:"ErrorFile"`
ConsoleOutput bool `toml:"ConsoleOutput"`
ConsoleError bool `toml:"ConsoleError"`
} `toml:"logging"`
}
func InitConfig(includeEnv bool) (*Config, error) {
configFiles := []string{
"./docker4ssh.conf",
"~/.docker4ssh",
"~/.config/docker4ssh.conf",
"/etc/docker4ssh/docker4ssh.conf",
}
for _, file := range configFiles {
if _, err := os.Stat(file); !os.IsNotExist(err) {
return LoadConfig(file, includeEnv)
}
}
return nil, fmt.Errorf("no speicfied config file (%s) could be found", strings.Join(configFiles, ", "))
}
func LoadConfig(file string, includeEnv bool) (*Config, error) {
config := &Config{}
if _, err := toml.DecodeFile(file, config); err != nil {
return nil, err
}
// make paths absolute
dir := filepath.Dir(file)
config.Profile.Dir = absoluteFile(dir, config.Profile.Dir)
config.Api.Configure.Binary = absoluteFile(dir, config.Api.Configure.Binary)
config.Api.Configure.Man = absoluteFile(dir, config.Api.Configure.Man)
config.SSH.Keyfile = absoluteFile(dir, config.SSH.Keyfile)
config.Database.Sqlite3File = absoluteFile(dir, config.Database.Sqlite3File)
config.Logging.OutputFile = absoluteFile(dir, config.Logging.OutputFile)
config.Logging.ErrorFile = absoluteFile(dir, config.Logging.ErrorFile)
if includeEnv {
if err := updateFromEnv(config); err != nil {
return nil, err
}
}
return config, nil
}
func absoluteFile(path, file string) string {
if filepath.IsAbs(file) {
return file
}
return filepath.Join(path, file)
}
// updateFromEnv looks up if specific environment variable are given which can
// also be used to configure the program.
// Every key in the config file can also be specified via environment variables.
// The env variable syntax is SECTION_KEY -> e.g. DEFAULT_PASSWORD or API_PORT
func updateFromEnv(config *Config) error {
re := reflect.ValueOf(config).Elem()
rt := re.Type()
for i := 0; i < re.NumField(); i++ {
rf := re.Field(i)
ree := rt.Field(i)
if err := envParseField(strings.ToUpper(ree.Tag.Get("toml")), rf); err != nil {
return err
}
}
return nil
}
func envParseField(prefix string, value reflect.Value) error {
for j := 0; j < value.NumField(); j++ {
rtt := value.Type().Field(j)
rff := value.Field(j)
if rff.Kind() == reflect.Struct {
if err := envParseField(fmt.Sprintf("%s_%s", prefix, strings.ToUpper(rtt.Tag.Get("toml"))), rff); err != nil {
return err
}
continue
}
envName := fmt.Sprintf("%s_%s", prefix, strings.ToUpper(rtt.Tag.Get("toml")))
val, ok := os.LookupEnv(envName)
if !ok {
continue
}
var expected string
switch rff.Kind() {
case reflect.String:
rff.SetString(val)
continue
case reflect.Bool:
b, err := strconv.ParseBool(val)
if err == nil {
rff.SetBool(b)
continue
}
expected = "true / false (boolean)"
case reflect.Uint16:
ui, err := strconv.ParseUint(val, 10, 16)
if err == nil {
rff.SetUint(ui)
continue
}
expected = "number (uint16)"
default:
return fmt.Errorf("parsed not implemented config type '%s'", rff.Kind())
}
return fmt.Errorf("failed to parse environment variable '%s': cannot parse value '%s' as %s", envName, val, expected)
}
return nil
}
func GetConfig() *Config {
return globConfig
}
func SetConfig(config *Config) {
globConfig = config
}

254
server/config/profile.go Normal file
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package config
import (
"crypto/sha1"
"crypto/sha256"
"crypto/sha512"
"encoding/json"
"fmt"
"github.com/BurntSushi/toml"
"go.uber.org/zap"
"hash"
"os"
"path/filepath"
"regexp"
"strings"
)
type Profile struct {
name string
Username *regexp.Regexp
Password *regexp.Regexp
passwordHashAlgo hash.Hash
NetworkMode int
Configurable bool
RunLevel int
StartupInformation bool
ExitAfter string
KeepOnExit bool
Image string
ContainerID string
}
func (p *Profile) Name() string {
return p.name
}
func (p *Profile) Match(user string, password []byte) bool {
// username should only be nil if profile was generated from Config.Profile.Dynamic
if p.Username == nil || p.Username.MatchString(user) {
if p.passwordHashAlgo != nil {
password = p.passwordHashAlgo.Sum(password)
}
return p.Password.Match(password)
}
return false
}
type preProfile struct {
Username string
Password string
NetworkMode int
Configurable bool
RunLevel int
StartupInformation bool
ExitAfter string
KeepOnExit bool
Image string
Container string
}
func LoadProfileFile(path string, defaultPreProfile preProfile) (Profiles, error) {
var rawProfile map[string]interface{}
if _, err := toml.DecodeFile(path, &rawProfile); err != nil {
return nil, err
}
profiles, err := parseRawProfile(rawProfile, path, defaultPreProfile)
if err != nil {
return nil, err
}
return profiles, nil
}
func LoadProfileDir(path string, defaultPreProfile preProfile) (Profiles, error) {
dir, err := os.ReadDir(path)
if err != nil {
return nil, err
}
var profiles Profiles
for i, profileConf := range dir {
p, err := LoadProfileFile(filepath.Join(path, profileConf.Name()), defaultPreProfile)
if err != nil {
return nil, err
}
profiles = append(profiles, p...)
zap.S().Debugf("Pre-loaded file %d (%s) with %d profile(s)", i+1, profileConf.Name(), len(p))
}
return profiles, nil
}
func parseRawProfile(rawProfile map[string]interface{}, path string, defaultPreProfile preProfile) (profiles []*Profile, err error) {
var count int
for key, value := range rawProfile {
rawValue, err := json.Marshal(value)
if err != nil {
return nil, err
}
pp := preProfile{
NetworkMode: 3,
RunLevel: 1,
StartupInformation: true,
}
if err = json.Unmarshal(rawValue, &pp); err != nil {
return nil, fmt.Errorf("failed to parse %s profile conf file %s: %v", key, path, err)
}
var rawUsername string
if rawUsername = strings.TrimPrefix(pp.Username, "regex:"); rawUsername == pp.Username {
rawUsername = strings.ReplaceAll(rawUsername, "*", ".*")
}
if !strings.HasSuffix(rawUsername, "$") {
rawUsername += "$"
}
username, err := regexp.Compile("(?m)" + rawUsername)
if err != nil {
return nil, fmt.Errorf("failed to parse %s profile username regex for conf file %s: %v", key, path, err)
}
var rawPassword string
if rawPassword = strings.TrimPrefix(pp.Password, "regex:"); rawUsername == pp.Password {
rawPassword = strings.ReplaceAll(rawPassword, "*", ".*")
}
algo, rawPasswordOrHash := getHash(rawPassword)
if algo == nil && rawPasswordOrHash == "" {
rawPasswordOrHash = ".*"
}
if !strings.HasSuffix(rawPasswordOrHash, "$") {
rawPasswordOrHash += "$"
}
password, err := regexp.Compile("(?m)" + rawPasswordOrHash)
if err != nil {
return nil, fmt.Errorf("failed to parse %s profile password regex for conf file %s: %v", key, path, err)
}
if (pp.Image == "") == (pp.Container == "") {
return nil, fmt.Errorf("failed to interpret %s profile image / container definition for conf file %s: `Image` or `Container` must be specified, not both nor none of them", key, path)
}
profiles = append(profiles, &Profile{
name: key,
Username: username,
Password: password,
passwordHashAlgo: algo,
NetworkMode: pp.NetworkMode,
Configurable: pp.Configurable,
RunLevel: pp.RunLevel,
StartupInformation: pp.StartupInformation,
ExitAfter: pp.ExitAfter,
KeepOnExit: pp.KeepOnExit,
Image: pp.Image,
ContainerID: pp.Container,
})
count++
zap.S().Debugf("Pre-loaded profile %s (%d)", key, count)
}
return
}
type Profiles []*Profile
func (ps Profiles) GetByName(name string) (*Profile, bool) {
for _, profile := range ps {
if profile.name == name {
return profile, true
}
}
return nil, false
}
func (ps Profiles) Match(user string, password []byte) (*Profile, bool) {
for _, profile := range ps {
if profile.Match(user, password) {
return profile, true
}
}
return nil, false
}
func DefaultPreProfileFromConfig(config *Config) preProfile {
defaultProfile := config.Profile.Default
return preProfile{
Password: defaultProfile.Password,
NetworkMode: defaultProfile.NetworkMode,
Configurable: defaultProfile.Configurable,
RunLevel: defaultProfile.RunLevel,
StartupInformation: defaultProfile.StartupInformation,
ExitAfter: defaultProfile.ExitAfter,
KeepOnExit: defaultProfile.KeepOnExit,
}
}
func HardcodedPreProfile() preProfile {
return preProfile{
NetworkMode: 3,
RunLevel: 1,
StartupInformation: true,
}
}
func DynamicProfileFromConfig(config *Config, defaultPreProfile preProfile) (Profile, error) {
raw, err := json.Marshal(config.Profile.Dynamic)
if err != nil {
return Profile{}, err
}
json.Unmarshal(raw, &defaultPreProfile)
algo, rawPasswordOrHash := getHash(defaultPreProfile.Password)
if algo == nil && rawPasswordOrHash == "" {
rawPasswordOrHash = ".*"
}
password, err := regexp.Compile("(?m)" + rawPasswordOrHash)
if err != nil {
return Profile{}, fmt.Errorf("failed to parse password regex: %v ", err)
}
return Profile{
name: "",
Username: nil,
Password: password,
passwordHashAlgo: algo,
NetworkMode: defaultPreProfile.NetworkMode,
Configurable: defaultPreProfile.Configurable,
RunLevel: defaultPreProfile.RunLevel,
StartupInformation: defaultPreProfile.StartupInformation,
ExitAfter: defaultPreProfile.ExitAfter,
KeepOnExit: defaultPreProfile.KeepOnExit,
}, nil
}
func getHash(password string) (algo hash.Hash, raw string) {
split := strings.SplitN(password, ":", 1)
if len(split) == 1 {
return nil, password
} else {
raw = split[1]
}
switch split[0] {
case "sha1":
algo = sha1.New()
case "sha256":
algo = sha256.New()
case "sha512":
algo = sha512.New()
default:
algo = nil
}
return
}

67
server/database/auth.go Normal file
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package database
import (
"golang.org/x/crypto/bcrypt"
)
type Auth struct {
User *string `json:"user"`
Password *[]byte `json:"password"`
}
func NewAuth(user string, password []byte) (Auth, error) {
hash, err := bcrypt.GenerateFromPassword(password, bcrypt.DefaultCost)
if err != nil {
return Auth{}, err
}
return Auth{
&user,
&hash,
}, nil
}
func NewUnsafeAuth(user string, password []byte) Auth {
auth, _ := NewAuth(user, password)
return auth
}
func (db *Database) SetAuth(containerID string, auth Auth) error {
if auth.User != nil {
_, err := db.Exec("INSERT INTO auth (container_id, user) VALUES ($1, $2) ON CONFLICT (container_id) DO UPDATE SET user=$2", containerID, *auth.User)
if err != nil {
return err
}
}
if auth.Password != nil {
_, err := db.Exec("INSERT INTO auth (container_id, password) VALUES ($1, $2) ON CONFLICT (container_id) DO UPDATE SET password=$2", containerID, *auth.Password)
if err != nil {
return err
}
}
return nil
}
// GetAuthByContainer returns the auth by a container id
func (db *Database) GetAuthByContainer(containerID string) (auth Auth, exists bool) {
if err := db.QueryRow("SELECT user, password FROM auth WHERE container_id=$1", containerID).Scan(&auth.User, &auth.Password); err != nil {
return Auth{}, false
}
return auth, true
}
func (db *Database) GetContainerByAuth(auth Auth) (containerID string, exists bool) {
// return true if `auth` contains a nil pointer or no auth was found in the database.
// hopefully this is no security issue
if auth.User == nil || auth.Password == nil {
return "", false
}
if err := db.QueryRow("SELECT container_id FROM auth WHERE user=$1 AND password=$2 OR password IS NULL", auth.User, auth.Password).Scan(&containerID); err != nil {
return "", false
}
return containerID, true
}
func (db *Database) DeleteAuth(containerID string) error {
_, err := db.Exec("DELETE FROM auth WHERE container_id=$1", containerID)
return err
}

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server/database/database.go Normal file
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package database
import (
"database/sql"
_ "github.com/mattn/go-sqlite3"
)
var globalDB *Database
type Database struct {
*sql.DB
}
func newDatabaseConnection(driverName, dataSource string) (*Database, error) {
database, err := sql.Open(driverName, dataSource)
if err != nil {
return nil, err
}
db := &Database{DB: database}
return db, nil
}
func NewSqlite3Connection(databaseFile string) (*Database, error) {
return newDatabaseConnection("sqlite3", databaseFile)
}
func GetDatabase() *Database {
return globalDB
}
func SetDatabase(database *Database) {
globalDB = database
}

11
server/database/delete.go Normal file
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package database
func (db *Database) Delete(containerID string) error {
if _, err := db.Exec("DELETE FROM auth WHERE container_id=$1", containerID); err != nil {
return err
}
if _, err := db.Exec("DELETE FROM settings WHERE container_id=$1", containerID); err != nil {
return err
}
return nil
}

75
server/database/settings.go Normal file
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package database
import (
"database/sql"
"encoding/json"
"fmt"
"reflect"
"strings"
)
// Settings is the raw version of docker.Config
type Settings struct {
NetworkMode *int `json:"network_mode"`
Configurable *bool `json:"configurable"`
RunLevel *int `json:"run_level"`
StartupInformation *bool `json:"startup_information"`
ExitAfter *string `json:"exit_after"`
KeepOnExit *bool `json:"keep_on_exit"`
}
func (db *Database) SettingsByContainerID(containerID string) (Settings, error) {
row := db.QueryRow("SELECT network_mode, configurable, run_level, startup_information, exit_after, keep_on_exit FROM settings WHERE container_id LIKE $1", fmt.Sprintf("%s%%", containerID))
var settings Settings
if err := row.Scan(&settings.NetworkMode, &settings.Configurable, &settings.RunLevel, &settings.StartupInformation, &settings.ExitAfter, &settings.KeepOnExit); err != nil {
return Settings{}, err
}
return settings, nil
}
func (db *Database) SetSettings(containerID string, settings Settings) error {
query := make(map[string]interface{}, 0)
body, _ := json.Marshal(settings)
json.Unmarshal(body, &query)
var keys, values []string
for k, v := range query {
if v != nil {
keys = append(keys, k)
switch reflect.ValueOf(v).Kind() {
case reflect.String:
values = append(values, fmt.Sprintf("\"%v\"", v))
case reflect.Bool:
if v.(bool) {
values = append(values, fmt.Sprintf("%v", 1))
} else {
values = append(values, fmt.Sprintf("%v", 0))
}
default:
values = append(values, fmt.Sprintf("%v", v))
}
}
}
err := db.QueryRow("SELECT 1 FROM settings WHERE container_id=$1", containerID).Scan()
if err == sql.ErrNoRows {
keys = append(keys, "container_id")
values = append(values, fmt.Sprintf("\"%s\"", containerID))
_, err = db.Exec(fmt.Sprintf("INSERT INTO settings (%s) VALUES (%s)", strings.Join(keys, ", "), strings.Join(values, ", ")))
} else if len(keys) > 0 {
var set []string
for i := 0; i < len(keys); i++ {
set = append(set, fmt.Sprintf("%s=%s", keys[i], values[i]))
}
_, err = db.Exec(fmt.Sprintf("UPDATE settings SET %s WHERE container_id=$1", strings.Join(set, ", ")), containerID)
} else {
err = nil
}
return err
}

12
server/docker/client.go Normal file
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package docker
import (
"docker4ssh/database"
"github.com/docker/docker/client"
)
type Client struct {
Client *client.Client
Database *database.Database
Network Network
}

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server/docker/container.go Normal file
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package docker
import (
"archive/tar"
"bytes"
"context"
c "docker4ssh/config"
"docker4ssh/database"
"docker4ssh/terminal"
"encoding/json"
"fmt"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/network"
"github.com/docker/docker/client"
"go.uber.org/zap"
"io"
"io/fs"
"net"
"os"
"path/filepath"
"reflect"
"strings"
"time"
)
func simpleContainerFromID(ctx context.Context, client *Client, config Config, containerID string) (*SimpleContainer, error) {
inspect, err := client.Client.ContainerInspect(ctx, containerID)
if err != nil {
return nil, err
}
sc := &SimpleContainer{
config: config,
Image: Image{
ref: inspect.Image,
},
ContainerID: containerID[:12],
FullContainerID: containerID,
client: client,
cli: client.Client,
}
sc.init(ctx)
return sc, nil
}
// newSimpleContainer creates a new container.
// Currently, only for internal usage, may be changing in future
func newSimpleContainer(ctx context.Context, client *Client, config Config, image Image, containerName string) (*SimpleContainer, error) {
// create a new container from the given image and activate in- and output
resp, err := client.Client.ContainerCreate(ctx, &container.Config{
Image: image.Ref(),
AttachStderr: true,
AttachStdin: true,
Tty: true,
AttachStdout: true,
OpenStdin: true,
}, nil, nil, nil, containerName)
if err != nil {
return nil, err
}
sc := &SimpleContainer{
config: config,
Image: image,
ContainerID: resp.ID[:12],
FullContainerID: resp.ID,
client: client,
cli: client.Client,
}
sc.init(ctx)
return sc, nil
}
// SimpleContainer is the basic struct to control a docker4ssh container
type SimpleContainer struct {
config Config
Image Image
ContainerID string
FullContainerID string
started bool
cancel context.CancelFunc
client *Client
// cli is just a shortcut for Client.Client
cli *client.Client
Network struct {
ID string
IP string
}
}
func (sc *SimpleContainer) init(ctx context.Context) {
// disconnect from default docker network
sc.cli.NetworkDisconnect(ctx, sc.client.Network[Host], sc.FullContainerID, true)
}
// Start starts the container
func (sc *SimpleContainer) Start(ctx context.Context) error {
if err := sc.cli.ContainerStart(ctx, sc.FullContainerID, types.ContainerStartOptions{}); err != nil {
return err
}
if !sc.started {
// initializes all settings.
// as third argument is a pseudo empty used to
// call every function in SimpleContainer.updateConfig.
// for the same reason Config.Configurable and
// Config.KeepOnExit are negated from their value in
// sc.config
if err := sc.updateConfig(ctx, Config{
Configurable: !sc.config.Configurable,
KeepOnExit: !sc.config.KeepOnExit,
}, sc.config); err != nil {
return err
}
sc.started = true
}
return nil
}
// Stop stops the container
func (sc *SimpleContainer) Stop(ctx context.Context) error {
timeout := 0 * time.Second
if err := sc.cli.ContainerStop(ctx, sc.FullContainerID, &timeout); err != nil {
return err
}
if !sc.config.KeepOnExit {
if err := sc.cli.ContainerRemove(ctx, sc.FullContainerID, types.ContainerRemoveOptions{Force: true}); err != nil {
return err
}
// delete all references to the container in the database
return sc.client.Database.Delete(sc.FullContainerID)
}
return nil
}
func (sc *SimpleContainer) Running(ctx context.Context) (bool, error) {
resp, err := sc.cli.ContainerInspect(ctx, sc.FullContainerID)
if err != nil {
return false, err
}
return resp.State != nil && resp.State.Running, nil
}
// WaitUntilStop waits until the container stops running
func (sc *SimpleContainer) WaitUntilStop(ctx context.Context) error {
statusChan, errChan := sc.cli.ContainerWait(ctx, sc.FullContainerID, container.WaitConditionNotRunning)
select {
case err := <-errChan:
return err
case <-statusChan:
}
return nil
}
// ExecuteConn executes a command in the container and returns the connection to the output
func (sc *SimpleContainer) ExecuteConn(ctx context.Context, command string, args ...string) (net.Conn, error) {
execID, err := sc.cli.ContainerExecCreate(ctx, sc.FullContainerID, types.ExecConfig{
AttachStdout: true,
AttachStderr: true,
Cmd: append([]string{command}, args...),
})
resp, err := sc.cli.ContainerExecAttach(ctx, execID.ID, types.ExecStartCheck{})
if err != nil {
return nil, err
}
return resp.Conn, err
}
// Execute executes a command in the container and returns the response after finished
func (sc *SimpleContainer) Execute(ctx context.Context, command string, args ...string) ([]byte, error) {
buf := bytes.Buffer{}
conn, err := sc.ExecuteConn(ctx, command, args...)
if err != nil {
return nil, err
}
io.Copy(&buf, conn)
return buf.Bytes(), nil
}
// CopyFrom copies a file from the host system to the client.
// Normal files and directories are accepted
func (sc *SimpleContainer) CopyFrom(ctx context.Context, src, dst string) error {
r, _, err := sc.cli.CopyFromContainer(ctx, sc.FullContainerID, src)
if err != nil {
return err
}
defer r.Close()
tr := tar.NewReader(r)
for {
header, err := tr.Next()
if err != nil {
if err == io.EOF {
return nil
}
return err
}
target := filepath.Join(dst, header.Name)
switch header.Typeflag {
case tar.TypeDir:
if _, err := os.Stat(target); os.IsNotExist(err) {
if err := os.MkdirAll(target, os.FileMode(header.Mode)); err != nil {
return err
}
}
case tar.TypeReg:
f, err := os.OpenFile(target, os.O_CREATE|os.O_RDWR, os.FileMode(header.Mode))
if err != nil {
return err
}
if _, err = io.Copy(f, tr); err != nil {
return err
}
_ = f.Close()
}
}
}
// CopyTo copies a file from the container to host.
// Normal files and directories are accepted
func (sc *SimpleContainer) CopyTo(ctx context.Context, src, dst string) error {
stat, err := os.Stat(src)
if err != nil {
return err
}
if stat.IsDir() {
err = filepath.Walk(src, func(path string, info fs.FileInfo, err error) error {
if err != nil {
return err
}
file, err := os.Open(path)
if err != nil {
return err
}
header, err := tar.FileInfoHeader(info, info.Name())
if err != nil {
return err
}
header.Name = strings.TrimPrefix(strings.TrimPrefix(path, src), "/")
// write every file to the container.
// it might be better to write the file content to a buffer or
// store the file pointer in a slice and write the buffer / stored
// file pointer to the tar writer when every file was walked
//
// TODO: Test if the two described methods are better than sending every file on it's own
buf := &bytes.Buffer{}
tw := tar.NewWriter(buf)
if err = tw.WriteHeader(header); err != nil {
return err
}
defer tw.Close()
io.Copy(tw, file)
err = sc.cli.CopyToContainer(ctx, sc.FullContainerID, dst, buf, types.CopyToContainerOptions{
AllowOverwriteDirWithFile: true,
})
if err != nil {
return err
}
return nil
})
if err != nil {
return err
}
} else {
file, err := os.Open(src)
if err != nil {
return err
}
info, err := os.Lstat(src)
if err != nil {
return err
}
header, err := tar.FileInfoHeader(info, info.Name())
if err != nil {
return err
}
header.Name = filepath.Base(src)
buf := &bytes.Buffer{}
tw := tar.NewWriter(buf)
if err = tw.WriteHeader(header); err != nil {
return err
}
defer tw.Close()
_, _ = io.Copy(tw, file)
err = sc.cli.CopyToContainer(ctx, sc.FullContainerID, dst, buf, types.CopyToContainerOptions{
AllowOverwriteDirWithFile: true,
})
if err != nil {
return err
}
}
return nil
}
// Config returns the current container config
func (sc *SimpleContainer) Config() Config {
return sc.config
}
// UpdateConfig updates the container config
func (sc *SimpleContainer) UpdateConfig(ctx context.Context, config Config) error {
oldConfig := sc.config
if err := sc.updateConfig(ctx, oldConfig, config); err != nil {
return err
}
var ocm, ncm, sm map[string]interface{}
sm = make(map[string]interface{}, 0)
ocj, _ := json.Marshal(oldConfig)
ncj, _ := json.Marshal(config)
json.Unmarshal(ocj, &ocm)
json.Unmarshal(ncj, &ncm)
srt := reflect.TypeOf(database.Settings{})
for k, v := range ocm {
newValue := ncm[k]
if v != newValue && newValue != nil {
field, ok := srt.FieldByName(k)
if !ok {
continue
}
sm[field.Tag.Get("json")] = newValue
}
}
// marshal the map into new settings
var settings database.Settings
body, _ := json.Marshal(sm)
json.Unmarshal(body, &settings)
err := sc.client.Database.SetSettings(sc.FullContainerID, settings)
if err != nil {
return err
}
if config.KeepOnExit {
if _, ok := sc.client.Database.GetAuthByContainer(sc.FullContainerID); !ok {
if err = sc.client.Database.SetAuth(sc.FullContainerID, database.Auth{
User: &sc.ContainerID,
}); err != nil {
return err
}
}
}
sc.config = config
return nil
}
func (sc *SimpleContainer) updateConfig(ctx context.Context, oldConfig, newConfig Config) error {
if newConfig.NetworkMode != oldConfig.NetworkMode {
if err := sc.setNetworkMode(ctx, oldConfig.NetworkMode, newConfig.NetworkMode, sc.client.Network != nil); err != nil {
return err
}
zap.S().Debugf("Set network mode for %s to %s", sc.ContainerID, newConfig.NetworkMode.Name())
}
if newConfig.Configurable != oldConfig.Configurable {
if err := sc.setConfigurable(ctx, newConfig.Configurable); err != nil {
return err
}
zap.S().Debugf("Set configurable for %s to %t", sc.ContainerID, newConfig.Configurable)
}
if newConfig.ExitAfter != oldConfig.ExitAfter {
sc.setExitAfterListener(ctx, newConfig.RunLevel, newConfig.ExitAfter)
zap.S().Debugf("Set exit after listener for %s", sc.ContainerID)
}
sc.config = newConfig
return nil
}
// setNetworkMode changes the network mode for the container
func (sc *SimpleContainer) setNetworkMode(ctx context.Context, oldMode, newMode NetworkMode, networking bool) error {
var networkID string
if !networking {
networkID = sc.client.Network[Off]
} else {
networkID = sc.client.Network[newMode]
}
if networkID != "" {
sc.cli.NetworkDisconnect(ctx, sc.client.Network[oldMode], sc.FullContainerID, true)
// connect container to a network
if err := sc.cli.NetworkConnect(ctx, networkID, sc.FullContainerID, &network.EndpointSettings{}); err != nil {
return err
}
}
// inspect the container to get its ip address (yes i was too lazy to implement
// a service that generates the ips without docker)
resp, err := sc.cli.ContainerInspect(ctx, sc.FullContainerID)
if err != nil {
return err
}
// update the internal network information
sc.Network.ID = networkID
sc.Network.IP = resp.NetworkSettings.Networks[newMode.NetworkName()].IPAddress
return nil
}
func (sc *SimpleContainer) setConfigurable(ctx context.Context, configurable bool) error {
cconfig := c.GetConfig()
if configurable {
for srcFile, dstDir := range map[string]string{cconfig.Api.Configure.Binary: "/bin", cconfig.Api.Configure.Man: "/usr/share/man/man1"} {
if err := sc.CopyTo(ctx, srcFile, dstDir); err != nil {
if strings.HasSuffix(dstDir, "/man1") {
// man files aren't that necessary, so if the copy fails it throws only a warning.
// this error gets thrown when the container is alpine linux, for example.
// it does not have a /usr/share/man/man1 directory and the copy fails
// TODO: Create a directory if not existing to prevent this error
zap.S().Warnf("Failed to copy %s to %s/%s for %s: %v", srcFile, dstDir, filepath.Base(srcFile), sc.ContainerID, err)
continue
} else {
return fmt.Errorf("failed to copy %s to %s/%s for %s: %v", srcFile, dstDir, filepath.Base(srcFile), sc.ContainerID, err)
}
}
zap.S().Debugf("Copied %s to %s (%s)", srcFile, filepath.Join(dstDir, filepath.Base(srcFile)), sc.ContainerID)
}
resp, err := sc.cli.ContainerInspect(ctx, sc.FullContainerID)
if err != nil {
return err
}
_, err = sc.Execute(ctx, "sh", "-c", fmt.Sprintf("echo -n %s:%d > /etc/docker4ssh", resp.NetworkSettings.Networks[sc.config.NetworkMode.NetworkName()].Gateway, cconfig.Api.Port))
if err != nil {
return err
}
zap.S().Debugf("Set ip and port of server for %s", sc.ContainerID)
} else {
_, err := sc.Execute(ctx, "rm",
"-rf",
fmt.Sprintf("/bin/%s", filepath.Base(cconfig.Api.Configure.Binary)),
fmt.Sprintf("/usr/share/man/man1/%s", filepath.Base(cconfig.Api.Configure.Man)),
"/etc/docker4ssh")
if err != nil {
return err
}
zap.S().Debugf("Removed all configurable related files from %s", sc.ContainerID)
}
return nil
}
// setAPIRoute sets the IP and port for docker container tools
func (sc *SimpleContainer) setAPIRoute(ctx context.Context, activate bool) error {
var err error
if activate {
var resp types.ContainerJSON
resp, err = sc.cli.ContainerInspect(ctx, sc.FullContainerID)
if err != nil {
return err
}
cconfig := c.GetConfig()
if resp.NetworkSettings != nil {
_, err = sc.Execute(ctx, "sh", "-c", fmt.Sprintf("echo -n %s:%d > /etc/docker4ssh", resp.NetworkSettings.Networks[sc.config.NetworkMode.NetworkName()].Gateway, cconfig.Api.Port))
}
} else {
_, err = sc.Execute(ctx, "rm", "-rf", "/etc/docker4ssh")
}
return err
}
// setExitAfterListener listens for exit after processes
func (sc *SimpleContainer) setExitAfterListener(ctx context.Context, runlevel RunLevel, process string) {
if sc.cancel != nil {
sc.cancel()
}
if process == "" {
return
}
cancelCtx, cancel := context.WithCancel(ctx)
sc.cancel = cancel
go func() {
var rawPid []byte
var err error
// check for the pid of Config.ExitAfter and wait 1 second if it wasn't found
for {
rawPid, err = sc.Execute(cancelCtx, "pidof", "-s", process)
if len(rawPid) > 0 || err != nil {
break
}
time.Sleep(1 * time.Second)
}
// sometimes garbage bytes are sent as well, they are getting filtered here
var pid []byte
for _, b := range rawPid {
if b > '0' && b < '9' {
pid = append(pid, b)
}
}
pid = bytes.TrimSuffix(pid, []byte("\n"))
if _, err = sc.Execute(cancelCtx, "sh", "-c", fmt.Sprintf("tail --pid=%s -f /dev/null", pid)); err != nil && cancelCtx.Err() == nil {
zap.S().Errorf("Could not wait on process %s (%s) for %s", process, pid, sc.ContainerID)
return
}
if runlevel != Forever {
sc.Stop(context.Background())
}
}()
}
func InteractiveContainerFromID(ctx context.Context, client *Client, config Config, containerID string) (*InteractiveContainer, error) {
sc, err := simpleContainerFromID(ctx, client, config, containerID)
if err != nil {
return nil, err
}
return &InteractiveContainer{
SimpleContainer: sc,
}, nil
}
func NewInteractiveContainer(ctx context.Context, cli *Client, config Config, image Image, containerName string) (*InteractiveContainer, error) {
sc, err := newSimpleContainer(ctx, cli, config, image, containerName)
if err != nil {
return nil, err
}
return &InteractiveContainer{
SimpleContainer: sc,
}, nil
}
type InteractiveContainer struct {
*SimpleContainer
terminalCount int
}
// TerminalCount returns the count of active terminals
func (ic *InteractiveContainer) TerminalCount() int {
return ic.terminalCount
}
// Terminal creates a new interactive terminal session for the container
func (ic *InteractiveContainer) Terminal(ctx context.Context, term *terminal.Terminal) error {
// get the default shell for the root user
rawShell, err := ic.Execute(ctx, "sh", "-c", "getent passwd root | cut -d : -f 7")
if err != nil {
return err
}
// here we cut out only newlines (which also could've been done via
// bytes.ReplaceAll or strings.ReplaceAll) and redundant bytes
// which sometimes get returned too and which cannot be interpreted
// by the docker engine
shell := bytes.Buffer{}
for _, b := range rawShell {
if b > ' ' {
shell.WriteByte(b)
}
}
id, err := ic.cli.ContainerExecCreate(ctx, ic.FullContainerID, types.ExecConfig{
Tty: true,
AttachStdin: true,
AttachStdout: true,
AttachStderr: true,
Cmd: []string{shell.String()},
})
if err != nil {
return err
}
resp, err := ic.cli.ContainerExecAttach(ctx, id.ID, types.ExecStartCheck{
Tty: true,
})
if err != nil {
return err
}
errChan := make(chan error)
go func() {
// copy every input to the container
if _, err = io.Copy(term, resp.Conn); err != nil {
errChan <- err
}
errChan <- nil
}()
go func() {
// copy every output from the container
if _, err = io.Copy(resp.Conn, term); err != nil {
errChan <- err
}
errChan <- nil
}()
ic.terminalCount++
select {
case err = <-errChan:
resp.Conn.Close()
}
ic.terminalCount--
return err
}

120
server/docker/docker.go Normal file
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package docker
import (
"github.com/docker/docker/client"
"os"
)
type NetworkMode int
const (
Off NetworkMode = iota + 1
// Isolate isolates the container from the host and the host's
// network. Therefore, no configurations can be changed from
// within the container
Isolate
// Host is the default docker networking configuration
Host
// Docker is the same configuration you get when you start a
// container via the command line
Docker
// None disables all isolation between the docker container
// and the host, so inside the network the container can act
// as the host. So it has access to the host's network directly
None
)
func (nm NetworkMode) Name() string {
switch nm {
case Off:
return "Off"
case Isolate:
return "Iso"
case Host:
return "Host"
case Docker:
return "Docker"
case None:
return "None"
}
return "invalid network"
}
func (nm NetworkMode) NetworkName() string {
switch nm {
case Off:
return "none"
case Isolate:
return "docker4ssh-full"
case Host:
return "bridge"
case Docker:
return "docker4ssh-def"
case None:
return "none"
}
return ""
}
type RunLevel int
const (
User RunLevel = iota + 1
Container
Forever
)
func (rl RunLevel) Name() string {
switch rl {
case User:
return "User"
case Container:
return "Container"
case Forever:
return "Forever"
}
return ""
}
type Config struct {
// NetworkMode describes the level of isolation of the container to the host system.
// Mostly changes the network of the container, see NetworkNames for more details
NetworkMode NetworkMode
// If Configurable is true, the container can change settings for itself
Configurable bool
// RunLevel describes the container behavior.
// If the RunLevel is User, the container will exit when the user disconnects.
// If the RunLevel is Container, the container keeps running if the user disconnects
// and ExitAfter is specified and the specified process has not finished yet.
// If the RunLevel is Forever, the container keeps running forever unless ExitAfter
// is specified and the specified process ends.
//
// Note: It also automatically exits if ExitAfter is specified and the specified
// process ends, even if the user is still connected to the container
RunLevel RunLevel
// StartupInformation defines if information about the container like its (shorthand)
// container id, NetworkMode, RunLevel, etc. should be shown when connecting to it
StartupInformation bool
// ExitAfter contains a process name after which end the container should stop
ExitAfter string
// When KeepOnExit is true, the container won't get deleted if it stops working
KeepOnExit bool
}
func InitCli() (*client.Client, error) {
return client.NewClientWithOpts()
}
func IsRunning() bool {
_, err := os.Stat("/var/run/docker.sock")
return !os.IsNotExist(err)
}

41
server/docker/image.go Normal file
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package docker
import (
"context"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/client"
"io"
)
type Image struct {
ref string
}
func (i Image) Ref() string {
return i.ref
}
// NewImage creates a new Image instance
func NewImage(ctx context.Context, cli *client.Client, ref string) (Image, io.ReadCloser, error) {
summary, err := cli.ImageList(ctx, types.ImageListOptions{
Filters: filters.NewArgs(filters.Arg("reference", ref)),
})
if err != nil {
return Image{}, nil, err
}
if len(summary) > 0 {
return Image{
ref: ref,
}, nil, nil
} else {
out, err := cli.ImagePull(ctx, ref, types.ImagePullOptions{})
if err != nil {
return Image{}, nil, err
}
return Image{
ref: ref,
}, out, nil
}
}

86
server/docker/network.go Normal file
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package docker
import (
"context"
c "docker4ssh/config"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/network"
"github.com/docker/docker/client"
)
type Network map[NetworkMode]string
// InitNetwork initializes a new docker4ssh network
func InitNetwork(ctx context.Context, cli *client.Client, config *c.Config) (Network, error) {
n := Network{}
networks, err := cli.NetworkList(ctx, types.NetworkListOptions{})
if err != nil {
return nil, err
}
for _, dockerNetwork := range networks {
var mode NetworkMode
switch dockerNetwork.Name {
case "none":
mode = Off
case "docker4ssh-iso":
mode = Isolate
case "bridge":
mode = Host
case "docker4ssh-def":
mode = Docker
case "host":
mode = None
default:
continue
}
n[mode] = dockerNetwork.ID
}
if _, ok := n[Isolate]; !ok {
// create a new network which isolates the container from the host,
// but not from the network
resp, err := cli.NetworkCreate(ctx, "docker4ssh-iso", types.NetworkCreate{
CheckDuplicate: true,
Driver: "bridge",
EnableIPv6: false,
IPAM: &network.IPAM{
Driver: "default",
Config: []network.IPAMConfig{
{
Subnet: config.Network.Isolate.Subnet,
},
},
},
})
if err != nil {
return nil, err
}
n[Isolate] = resp.ID
}
if _, ok := n[Docker]; !ok {
// the standard network for all containers
resp, err := cli.NetworkCreate(ctx, "docker4ssh-def", types.NetworkCreate{
CheckDuplicate: true,
Driver: "bridge",
EnableIPv6: false,
IPAM: &network.IPAM{
Driver: "default",
Config: []network.IPAMConfig{
{
Subnet: config.Network.Default.Subnet,
},
},
},
})
if err != nil {
return nil, err
}
n[Docker] = resp.ID
}
return n, nil
}

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server/go.mod Normal file
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module docker4ssh
go 1.17
require (
github.com/BurntSushi/toml v0.4.1
github.com/docker/docker v20.10.11+incompatible
github.com/docker/go-units v0.4.0
github.com/mattn/go-sqlite3 v1.14.9
github.com/morikuni/aec v1.0.0
github.com/spf13/cobra v1.0.0
go.uber.org/zap v1.19.1
golang.org/x/crypto v0.0.0-20211202192323-5770296d904e
)
require (
github.com/Microsoft/go-winio v0.4.17 // indirect
github.com/containerd/containerd v1.5.8 // indirect
github.com/docker/distribution v2.7.1+incompatible // indirect
github.com/docker/go-connections v0.4.0 // indirect
github.com/gogo/protobuf v1.3.2 // indirect
github.com/golang/protobuf v1.5.0 // indirect
github.com/gorilla/mux v1.8.0 // indirect
github.com/inconshreveable/mousetrap v1.0.0 // indirect
github.com/moby/term v0.0.0-20210619224110-3f7ff695adc6 // indirect
github.com/opencontainers/go-digest v1.0.0 // indirect
github.com/opencontainers/image-spec v1.0.2 // indirect
github.com/pkg/errors v0.9.1 // indirect
github.com/sirupsen/logrus v1.8.1 // indirect
github.com/spf13/pflag v1.0.5 // indirect
go.uber.org/atomic v1.7.0 // indirect
go.uber.org/multierr v1.6.0 // indirect
golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2 // indirect
golang.org/x/sys v0.0.0-20210616094352-59db8d763f22 // indirect
golang.org/x/time v0.0.0-20211116232009-f0f3c7e86c11 // indirect
google.golang.org/genproto v0.0.0-20201110150050-8816d57aaa9a // indirect
google.golang.org/grpc v1.42.0 // indirect
google.golang.org/protobuf v1.27.1 // indirect
)
replace golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1 => github.com/ByteDream/term v0.0.0-20211025115508-891a970291e6

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server/go.sum Normal file
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32
server/logging/logging.go Normal file
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package logging
import (
"fmt"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
)
func InitLogging(level zap.AtomicLevel, outputFiles, errorFiles []string) {
encoderConfig := zap.NewProductionEncoderConfig()
encoderConfig.EncodeTime = zapcore.TimeEncoderOfLayout("[2006-01-02 15:04:05] -")
encoderConfig.ConsoleSeparator = " "
encoderConfig.EncodeLevel = func(level zapcore.Level, encoder zapcore.PrimitiveArrayEncoder) {
encoder.AppendString(fmt.Sprintf("%s:", level.CapitalString()))
}
encoderConfig.EncodeCaller = nil
config := zap.NewProductionConfig()
config.EncoderConfig = encoderConfig
config.Encoding = "console"
config.Level = level
config.OutputPaths = outputFiles
config.ErrorOutputPaths = errorFiles
logger, err := config.Build()
if err != nil {
panic(err)
}
zap.ReplaceGlobals(logger)
}

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server/main.go Normal file
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package main
import (
"docker4ssh/cmd"
)
func main() {
cmd.Execute()
}

68
server/ssh/config.go Normal file
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package ssh
import (
c "docker4ssh/config"
"docker4ssh/database"
"fmt"
"golang.org/x/crypto/ssh"
"io/ioutil"
)
func NewSSHConfig(config *c.Config) (*ssh.ServerConfig, error) {
db := database.GetDatabase()
sshConfig := &ssh.ServerConfig{
MaxAuthTries: 3,
PasswordCallback: func(conn ssh.ConnMetadata, password []byte) (*ssh.Permissions, error) {
if containerID, exists := db.GetContainerByAuth(database.NewUnsafeAuth(conn.User(), password)); exists && containerID != "" {
return &ssh.Permissions{
CriticalOptions: map[string]string{
"containerID": containerID,
},
}, nil
} else if profile, ok := profiles.Match(conn.User(), password); ok {
return &ssh.Permissions{
CriticalOptions: map[string]string{
"profile": profile.Name(),
},
}, nil
} else if config.Profile.Dynamic.Enable && dynamicProfile.Match(conn.User(), password) {
return &ssh.Permissions{
CriticalOptions: map[string]string{
"profile": "dynamic",
"image": conn.User(),
},
}, nil
}
// i think logging the wrong password is a bit unsafe.
// if you have e.g. just a type in it isn't very well to see your nearly correct password in the logs
return nil, fmt.Errorf("%s tried to connect with user %s but entered wrong a password", conn.RemoteAddr().String(), conn.User())
},
}
sshConfig.SetDefaults()
key, err := parseSSHPrivateKey(config.SSH.Keyfile, []byte(config.SSH.Passphrase))
if err != nil {
return nil, err
}
sshConfig.AddHostKey(key)
return sshConfig, nil
}
func parseSSHPrivateKey(path string, password []byte) (ssh.Signer, error) {
keyBytes, err := ioutil.ReadFile(path)
if err != nil {
return nil, err
}
var key ssh.Signer
if len(password) == 0 {
key, err = ssh.ParsePrivateKey(keyBytes)
} else {
key, err = ssh.ParsePrivateKeyWithPassphrase(keyBytes, password)
}
if err != nil {
return nil, err
}
return key, nil
}

201
server/ssh/connection.go Normal file
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package ssh
import (
"bytes"
"context"
"database/sql"
"docker4ssh/database"
"docker4ssh/docker"
"docker4ssh/utils"
"fmt"
"go.uber.org/zap"
"strconv"
"sync"
"time"
)
var (
allContainers []*docker.InteractiveContainer
)
func closeAllContainers(ctx context.Context) {
var wg sync.WaitGroup
for _, container := range allContainers {
wg.Add(1)
container := container
go func() {
container.Stop(ctx)
wg.Done()
}()
}
wg.Wait()
}
func connection(client *docker.Client, user *User) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
container, ok := getContainer(ctx, client, user)
if !ok {
zap.S().Errorf("Failed to create container for %s", user.ID)
return
}
user.Container = container.SimpleContainer
var found bool
for _, cont := range allContainers {
if cont == container {
found = true
}
}
if !found {
allContainers = append(allContainers, container)
}
// check if the container is running and start it if not
if running, err := container.Running(ctx); err == nil && !running {
if err = container.Start(ctx); err != nil {
zap.S().Errorf("Failed to start container %s: %v", container.ContainerID, err)
fmt.Fprintln(user.Terminal, "Failed to start container")
return
}
zap.S().Infof("Started container %s with internal id '%s', ip '%s'", container.ContainerID, container.ContainerID, container.Network.IP)
} else if err != nil {
zap.S().Errorf("Failed to get container running state: %v", err)
fmt.Fprintln(user.Terminal, "Failed to check container running state")
}
config := container.Config()
if user.Profile.StartupInformation {
buf := &bytes.Buffer{}
fmt.Fprintf(buf, "┌───Container────────────────┐\r\n")
fmt.Fprintf(buf, "│ Container ID: %-12s │\r\n", container.ContainerID)
fmt.Fprintf(buf, "│ Network Mode: %-12s │\r\n", config.NetworkMode.Name())
fmt.Fprintf(buf, "│ Configurable: %-12t │\r\n", config.Configurable)
fmt.Fprintf(buf, "│ Run Level: %-12s │\r\n", config.RunLevel.Name())
fmt.Fprintf(buf, "│ Exit After: %-12s │\r\n", config.ExitAfter)
fmt.Fprintf(buf, "│ Keep On Exit: %-12t │\r\n", config.KeepOnExit)
fmt.Fprintf(buf, "└──────────────Information───┘\r\n")
user.Terminal.Write(buf.Bytes())
}
// start a new terminal session
if err := container.Terminal(ctx, user.Terminal); err != nil {
zap.S().Errorf("Failed to serve %s terminal: %v", container.ContainerID, err)
fmt.Fprintln(user.Terminal, "Failed to serve terminal")
}
if config.RunLevel == docker.User && container.TerminalCount() == 0 {
if err := container.Stop(ctx); err != nil {
zap.S().Errorf("Error occoured while stopping container %s: %v", container.ContainerID, err)
} else {
lenBefore := len(allContainers)
for i, cont := range allContainers {
if cont == container {
allContainers[i] = allContainers[lenBefore-1]
allContainers = allContainers[:lenBefore-1]
break
}
}
if lenBefore == len(allContainers) {
zap.S().Warnf("Stopped container %s, but failed to remove it from the global container scope", container.ContainerID)
} else {
zap.S().Infof("Stopped container %s", container.ContainerID)
}
}
}
zap.S().Infof("Stopped session for user %s", user.ID)
}
func getContainer(ctx context.Context, client *docker.Client, user *User) (container *docker.InteractiveContainer, ok bool) {
db := database.GetDatabase()
var config docker.Config
// check if the user has a container (id) assigned
if user.Profile.ContainerID != "" {
for _, cont := range allContainers {
if cont.FullContainerID == user.Profile.ContainerID {
return cont, true
}
}
settings, err := db.SettingsByContainerID(user.Profile.ContainerID)
if err != nil {
zap.S().Errorf("Failed to get stored container config for container %s: %v", user.Profile.ContainerID, err)
fmt.Fprintf(user.Terminal, "Could not connect to saved container")
return nil, false
}
config = docker.Config{
NetworkMode: docker.NetworkMode(*settings.NetworkMode),
Configurable: *settings.Configurable,
RunLevel: docker.RunLevel(*settings.RunLevel),
StartupInformation: *settings.StartupInformation,
ExitAfter: *settings.ExitAfter,
KeepOnExit: *settings.KeepOnExit,
}
container, err = docker.InteractiveContainerFromID(ctx, client, config, user.Profile.ContainerID)
if err != nil {
zap.S().Errorf("Failed to get container from id %s: %v", user.Profile.ContainerID, err)
fmt.Fprintf(user.Terminal, "Failed to get container")
return nil, false
}
zap.S().Infof("Re-used container %s for user %s", user.Profile.ContainerID, user.ID)
} else {
config = docker.Config{
NetworkMode: docker.NetworkMode(user.Profile.NetworkMode),
Configurable: user.Profile.Configurable,
RunLevel: docker.RunLevel(user.Profile.RunLevel),
StartupInformation: user.Profile.StartupInformation,
ExitAfter: user.Profile.ExitAfter,
KeepOnExit: user.Profile.KeepOnExit,
}
image, out, err := docker.NewImage(ctx, client.Client, user.Profile.Image)
if err != nil {
zap.S().Errorf("Failed to get '%s' image for profile %s: %v", user.Profile.Image, user.Profile.Name(), err)
fmt.Fprintf(user.Terminal, "Failed to get image %s", image.Ref())
return nil, false
}
if out != nil {
if err := utils.DisplayJSONMessagesStream(out, user.Terminal, user.Terminal); err != nil {
zap.S().Fatalf("Failed to fetch '%s' docker image: %v", image.Ref(), err)
fmt.Fprintf(user.Terminal, "Failed to fetch image %s", image.Ref())
return nil, false
}
}
container, err = docker.NewInteractiveContainer(ctx, client, config, image, strconv.Itoa(int(time.Now().Unix())))
if err != nil {
zap.S().Errorf("Failed to create interactive container: %v", err)
fmt.Fprintln(user.Terminal, "Failed to create interactive container")
return nil, false
}
zap.S().Infof("Created new %s container (%s) for user %s", image.Ref(), container.ContainerID, user.ID)
}
if _, err := db.SettingsByContainerID(container.FullContainerID); err != nil {
if err == sql.ErrNoRows {
rawNetworkMode := int(config.NetworkMode)
rawRunLevel := int(config.RunLevel)
if err := db.SetSettings(container.FullContainerID, database.Settings{
NetworkMode: &rawNetworkMode,
Configurable: &config.Configurable,
RunLevel: &rawRunLevel,
StartupInformation: &config.StartupInformation,
ExitAfter: &config.ExitAfter,
KeepOnExit: &config.KeepOnExit,
}); err != nil {
zap.S().Errorf("Failed to update settings for container %s for user %s: %v", container.ContainerID, user.ID, err)
return nil, false
}
}
}
return container, true
}

79
server/ssh/handle.go Normal file
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package ssh
import (
"docker4ssh/docker"
"fmt"
"go.uber.org/zap"
"golang.org/x/crypto/ssh"
)
type RequestType string
const (
RequestPtyReq RequestType = "pty-req"
RequestWindowChange RequestType = "window-change"
)
type PtyReqPayload struct {
Term string
Width, Height uint32
PixelWidth, PixelHeight uint32
Modes []byte
}
func handleChannels(chans <-chan ssh.NewChannel, client *docker.Client, user *User) {
for channel := range chans {
go handleChannel(channel, client, user)
}
}
func handleChannel(channel ssh.NewChannel, client *docker.Client, user *User) {
if t := channel.ChannelType(); t != "session" {
channel.Reject(ssh.UnknownChannelType, fmt.Sprintf("unknown channel type: %s", t))
return
}
conn, requests, err := channel.Accept()
if err != nil {
zap.S().Warnf("Failed to accept channel for user %s", user.ID)
return
}
defer conn.Close()
user.Terminal.ReadWriter = conn
// handle all other request besides the normal user input.
// currently, only 'pty-req' is implemented which determines a terminal size change
go handleRequest(requests, user)
// this handles the actual user terminal connection.
// blocks until the session has finished
connection(client, user)
zap.S().Debugf("Session for user %s ended", user.ID)
}
func handleRequest(requests <-chan *ssh.Request, user *User) {
for request := range requests {
switch RequestType(request.Type) {
case RequestPtyReq:
// this could spam the logs when the user resizes his window constantly
// log()
var ptyReq PtyReqPayload
ssh.Unmarshal(request.Payload, &ptyReq)
user.Terminal.Width = ptyReq.Width
user.Terminal.Height = ptyReq.Height
case RequestWindowChange:
// prevent from logging
default:
zap.S().Debugf("New request from user %s - Type: %s, Want Reply: %t, Payload: '%s'", user.ID, request.Type, request.WantReply, request.Payload)
}
if request.WantReply {
request.Reply(true, nil)
}
}
}

190
server/ssh/ssh.go Normal file
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package ssh
import (
"context"
"crypto/md5"
c "docker4ssh/config"
"docker4ssh/database"
"docker4ssh/docker"
"docker4ssh/terminal"
"encoding/hex"
"fmt"
"go.uber.org/zap"
"golang.org/x/crypto/ssh"
"net"
"regexp"
"strings"
)
var (
users = make([]*User, 0)
profiles c.Profiles
dynamicProfile c.Profile
)
type User struct {
*ssh.ServerConn
ID string
IP string
Profile *c.Profile
Terminal *terminal.Terminal
Container *docker.SimpleContainer
}
func GetUser(ip string) *User {
for _, user := range users {
if container := user.Container; container != nil && container.Network.IP == ip {
return user
}
}
return nil
}
type extras struct {
containerID string
}
func StartServing(config *c.Config, serverConfig *ssh.ServerConfig) (errChan chan error, closer func() error) {
errChan = make(chan error, 1)
var err error
profiles, err = c.LoadProfileDir(config.Profile.Dir, c.DefaultPreProfileFromConfig(config))
if err != nil {
errChan <- err
return
}
zap.S().Debugf("Loaded %d profile(s)", len(profiles))
if config.Profile.Dynamic.Enable {
dynamicProfile, err = c.DynamicProfileFromConfig(config, c.DefaultPreProfileFromConfig(config))
if err != nil {
errChan <- err
return
}
zap.S().Debugf("Loaded dynamic profile")
}
cli, err := docker.InitCli()
if err != nil {
errChan <- err
return
}
zap.S().Debugf("Initialized docker cli")
network, err := docker.InitNetwork(context.Background(), cli, config)
if err != nil {
errChan <- err
return
}
zap.S().Debugf("Initialized docker networks")
client := &docker.Client{
Client: cli,
Database: database.GetDatabase(),
Network: network,
}
listener, err := net.Listen("tcp", fmt.Sprintf(":%d", config.SSH.Port))
if err != nil {
errChan <- err
return
}
zap.S().Debugf("Created ssh listener")
var closed bool
go func() {
db := database.GetDatabase()
for {
conn, err := listener.Accept()
if err != nil {
if closed {
return
}
zap.S().Errorf("Failed to accept new ssh user: %v", err)
continue
}
serverConn, chans, requests, err := ssh.NewServerConn(conn, serverConfig)
if err != nil {
zap.S().Errorf("Failed to establish new ssh connection: %v", err)
continue
}
idBytes := md5.Sum([]byte(strings.Split(serverConn.User(), ":")[0]))
idString := hex.EncodeToString(idBytes[:])
zap.S().Infof("New ssh connection from %s with %s (%s)", serverConn.RemoteAddr().String(), serverConn.ClientVersion(), idString)
var profile *c.Profile
if name, ok := serverConn.Permissions.CriticalOptions["profile"]; ok {
if name == "dynamic" {
if image, ok := serverConn.Permissions.CriticalOptions["image"]; ok {
tempDynamicProfile := dynamicProfile
tempDynamicProfile.Image = image
profile = &tempDynamicProfile
}
}
if profile == nil {
if profile, ok = profiles.GetByName(name); !ok {
zap.S().Errorf("Failed to get profile %s", name)
continue
}
}
} else if containerID, ok := serverConn.Permissions.CriticalOptions["containerID"]; ok {
if settings, err := db.SettingsByContainerID(containerID); err == nil {
profile = &c.Profile{
NetworkMode: *settings.NetworkMode,
Configurable: *settings.Configurable,
RunLevel: *settings.RunLevel,
StartupInformation: *settings.StartupInformation,
ExitAfter: *settings.ExitAfter,
KeepOnExit: *settings.KeepOnExit,
ContainerID: containerID,
}
} else {
for _, container := range allContainers {
if container.ContainerID == containerID {
cconfig := c.GetConfig()
profile = &c.Profile{
Password: regexp.MustCompile(cconfig.Profile.Default.Password),
NetworkMode: cconfig.Profile.Default.NetworkMode,
Configurable: cconfig.Profile.Default.Configurable,
RunLevel: cconfig.Profile.Default.RunLevel,
StartupInformation: cconfig.Profile.Default.StartupInformation,
ExitAfter: cconfig.Profile.Default.ExitAfter,
KeepOnExit: cconfig.Profile.Default.KeepOnExit,
Image: "",
ContainerID: containerID,
}
}
}
}
}
zap.S().Debugf("User %s has profile %s", idString, profile.Name())
user := &User{
ServerConn: serverConn,
ID: idString,
Terminal: &terminal.Terminal{},
Profile: profile,
}
users = append(users, user)
go ssh.DiscardRequests(requests)
go handleChannels(chans, client, user)
}
}()
return errChan, func() error {
closed = true
// close all containers
closeAllContainers(context.Background())
// close the listener
return listener.Close()
}
}

9
server/terminal/terminal.go Normal file
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package terminal
import "io"
type Terminal struct {
io.ReadWriter
Width, Height uint32
}

27
server/utils/convert.go Normal file
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package utils
import (
"regexp"
"strings"
)
func UsernameToRegex(username string) (*regexp.Regexp, error) {
var rawUsername string
if rawUsername = strings.TrimPrefix(username, "regex:"); rawUsername == username {
rawUsername = strings.ReplaceAll(rawUsername, "*", ".*")
}
return regexp.Compile(rawUsername)
}
func PasswordToRegex(password string) (*regexp.Regexp, error) {
splitPassword := strings.SplitN(password, ":", 1)
if len(splitPassword) > 1 {
switch splitPassword[0] {
case "regex":
return regexp.Compile(splitPassword[1])
case "sha1", "sha256", "sha512":
password = splitPassword[1]
}
}
return regexp.Compile(strings.ReplaceAll(password, "*", ".*"))
}

238
server/utils/jsonmessage.go Normal file
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// adopted from https://github.com/docker/cli/blob/a32cd16160f1b41c1c4ae7bee4dac929d1484e59/vendor/github.com/docker/docker/pkg/jsonmessage/jsonmessage.go
package utils
import (
"docker4ssh/terminal"
"encoding/json"
"fmt"
"github.com/docker/go-units"
"github.com/morikuni/aec"
"io"
"strings"
"time"
)
// RFC3339NanoFixed is time.RFC3339Nano with nanoseconds padded using zeros to
// ensure the formatted time is always the same number of characters.
const RFC3339NanoFixed = "2006-01-02T15:04:05.000000000Z07:00"
// JSONError wraps a concrete Code and Message, `Code` is
// an integer error code, `Message` is the error message.
type JSONError struct {
Code int `json:"code,omitempty"`
Message string `json:"message,omitempty"`
}
func (e *JSONError) Error() string {
return e.Message
}
// JSONProgress describes a progress. terminalFd is the fd of the current terminal,
// Start is the initial value for the operation. Current is the current status and
// value of the progress made towards Total. Total is the end value describing when
// we made 100% progress for an operation.
type JSONProgress struct {
Terminal *terminal.Terminal
Current int64 `json:"current,omitempty"`
Total int64 `json:"total,omitempty"`
Start int64 `json:"start,omitempty"`
// If true, don't show xB/yB
HideCounts bool `json:"hidecounts,omitempty"`
Units string `json:"units,omitempty"`
}
func (p *JSONProgress) String() string {
var (
width = p.Terminal.Width
pbBox string
numbersBox string
timeLeftBox string
)
if p.Current <= 0 && p.Total <= 0 {
return ""
}
if p.Total <= 0 {
switch p.Units {
case "":
current := units.HumanSize(float64(p.Current))
return fmt.Sprintf("%8v", current)
default:
return fmt.Sprintf("%d %s", p.Current, p.Units)
}
}
percentage := int(float64(p.Current)/float64(p.Total)*100) / 2
if percentage > 50 {
percentage = 50
}
if width > 110 {
// this number can't be negative gh#7136
numSpaces := 0
if 50-percentage > 0 {
numSpaces = 50 - percentage
}
pbBox = fmt.Sprintf("[%s>%s] ", strings.Repeat("=", percentage), strings.Repeat(" ", numSpaces))
}
switch {
case p.HideCounts:
case p.Units == "": // no units, use bytes
current := units.HumanSize(float64(p.Current))
total := units.HumanSize(float64(p.Total))
numbersBox = fmt.Sprintf("%8v/%v", current, total)
if p.Current > p.Total {
// remove total display if the reported current is wonky.
numbersBox = fmt.Sprintf("%8v", current)
}
default:
numbersBox = fmt.Sprintf("%d/%d %s", p.Current, p.Total, p.Units)
if p.Current > p.Total {
// remove total display if the reported current is wonky.
numbersBox = fmt.Sprintf("%d %s", p.Current, p.Units)
}
}
if p.Current > 0 && p.Start > 0 && percentage < 50 {
fromStart := time.Now().Sub(time.Unix(p.Start, 0))
perEntry := fromStart / time.Duration(p.Current)
left := time.Duration(p.Total-p.Current) * perEntry
left = (left / time.Second) * time.Second
if width > 50 {
timeLeftBox = " " + left.String()
}
}
return pbBox + numbersBox + timeLeftBox
}
// JSONMessage defines a message struct. It describes
// the created time, where it from, status, ID of the
// message. It's used for docker events.
type JSONMessage struct {
Stream string `json:"stream,omitempty"`
Status string `json:"status,omitempty"`
Progress *JSONProgress `json:"progressDetail,omitempty"`
ProgressMessage string `json:"progress,omitempty"` // deprecated
ID string `json:"id,omitempty"`
From string `json:"from,omitempty"`
Time int64 `json:"time,omitempty"`
TimeNano int64 `json:"timeNano,omitempty"`
Error *JSONError `json:"errorDetail,omitempty"`
ErrorMessage string `json:"error,omitempty"` // deprecated
// Aux contains out-of-band data, such as digests for push signing and image id after building.
Aux *json.RawMessage `json:"aux,omitempty"`
}
func clearLine(out io.Writer) {
eraseMode := aec.EraseModes.All
cl := aec.EraseLine(eraseMode)
fmt.Fprint(out, cl)
}
func cursorUp(out io.Writer, l uint) {
fmt.Fprint(out, aec.Up(l))
}
func cursorDown(out io.Writer, l uint) {
fmt.Fprint(out, aec.Down(l))
}
// Display displays the JSONMessage to `out`. If `isTerminal` is true, it will erase the
// entire current line when displaying the progressbar.
func (jm *JSONMessage) Display(out io.Writer) error {
if jm.Error != nil {
if jm.Error.Code == 401 {
return fmt.Errorf("authentication is required")
}
return jm.Error
}
var endl string
if jm.Stream == "" && jm.Progress != nil {
clearLine(out)
endl = "\r"
fmt.Fprint(out, endl)
} else if jm.Progress != nil && jm.Progress.String() != "" { // disable progressbar in non-terminal
return nil
}
if jm.TimeNano != 0 {
fmt.Fprintf(out, "%s ", time.Unix(0, jm.TimeNano).Format(RFC3339NanoFixed))
} else if jm.Time != 0 {
fmt.Fprintf(out, "%s ", time.Unix(jm.Time, 0).Format(RFC3339NanoFixed))
}
if jm.ID != "" {
fmt.Fprintf(out, "%s: ", jm.ID)
}
if jm.From != "" {
fmt.Fprintf(out, "(from %s) ", jm.From)
}
if jm.Progress != nil {
fmt.Fprintf(out, "%s %s%s", jm.Status, jm.Progress.String(), endl)
} else if jm.ProgressMessage != "" { // deprecated
fmt.Fprintf(out, "%s %s%s", jm.Status, jm.ProgressMessage, endl)
} else if jm.Stream != "" {
fmt.Fprintf(out, "%s%s", jm.Stream, endl)
} else {
fmt.Fprintf(out, "%s%s\r\n", jm.Status, endl)
}
return nil
}
// DisplayJSONMessagesStream displays a json message stream from `in` to `out`, `isTerminal`
// describes if `out` is a terminal. If this is the case, it will print `\n` at the end of
// each line and move the cursor while displaying.
func DisplayJSONMessagesStream(in io.Reader, out io.Writer, term *terminal.Terminal) error {
var (
dec = json.NewDecoder(in)
ids = make(map[string]uint)
)
for {
var diff uint
var jm JSONMessage
if err := dec.Decode(&jm); err != nil {
if err == io.EOF {
break
}
return err
}
if jm.Progress != nil {
jm.Progress.Terminal = term
}
if jm.ID != "" && (jm.Progress != nil || jm.ProgressMessage != "") {
line, ok := ids[jm.ID]
if !ok {
// NOTE: This approach of using len(id) to
// figure out the number of lines of history
// only works as long as we clear the history
// when we output something that's not
// accounted for in the map, such as a line
// with no ID.
line = uint(len(ids))
ids[jm.ID] = line
fmt.Fprintf(out, "\r\n")
}
diff = uint(len(ids)) - line
cursorUp(out, diff)
} else {
// When outputting something that isn't progress
// output, clear the history of previous lines. We
// don't want progress entries from some previous
// operation to be updated (for example, pull -a
// with multiple tags).
ids = make(map[string]uint)
}
err := jm.Display(out)
if jm.ID != "" {
cursorDown(out, diff)
}
if err != nil {
return err
}
}
return nil
}

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server/validate/error.go Normal file
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package validate
import "fmt"
func newValidateError(section, key string, value interface{}, message string, original error) *ValidateError {
return &ValidateError{
section: section,
key: key,
value: value,
message: message,
originalError: original,
}
}
type ValidateError struct {
error
section string
key string
value interface{}
message string
originalError error
}
func (ve *ValidateError) Error() string {
if ve.originalError != nil {
return fmt.Sprintf("failed to validate %s.%s (%v), %s: %v", ve.section, ve.key, ve.value, ve.message, ve.originalError)
} else {
return fmt.Sprintf("failed to validate %s.%s (%v), %s", ve.section, ve.key, ve.value, ve.message)
}
}

45
server/validate/validate.go Normal file
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package validate
import (
"fmt"
"github.com/docker/docker/client"
"strings"
)
type Validator struct {
Cli *client.Client
Strict bool
}
type ValidatorResult struct {
Strict bool
Errors []*ValidateError
}
func (vr *ValidatorResult) Ok() bool {
return len(vr.Errors) == 0
}
func (vr *ValidatorResult) String() string {
builder := strings.Builder{}
if len(vr.Errors) == 0 {
if vr.Strict {
builder.WriteString("Validated all files, no errors were found. You're good to go (strict mode on)")
} else {
builder.WriteString("Validated all files, no errors were found. You're good to go")
}
} else {
if vr.Strict {
builder.WriteString(fmt.Sprintf("Found %d errors (strict mode on)\n\n", len(vr.Errors)))
} else {
builder.WriteString(fmt.Sprintf("Found %d errors\n\n", len(vr.Errors)))
}
for _, err := range vr.Errors {
builder.WriteString(fmt.Sprintf("%v\n", err))
}
}
return builder.String()
}

264
server/validate/validate_config.go Normal file
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package validate
import (
"docker4ssh/config"
"docker4ssh/docker"
"docker4ssh/utils"
"fmt"
"github.com/docker/docker/client"
"go.uber.org/zap"
s "golang.org/x/crypto/ssh"
"io/ioutil"
"net"
"os"
"path/filepath"
"strings"
)
func NewConfigValidator(cli *client.Client, strict bool, config *config.Config) *ConfigValidator {
return &ConfigValidator{
Validator: &Validator{
Cli: cli,
Strict: strict,
},
Config: config,
}
}
type ConfigValidator struct {
*Validator
Config *config.Config
}
func (cv *ConfigValidator) Validate() *ValidatorResult {
errors := make([]*ValidateError, 0)
errors = append(errors, cv.ValidateProfile().Errors...)
errors = append(errors, cv.ValidateAPI().Errors...)
errors = append(errors, cv.ValidateSSH().Errors...)
errors = append(errors, cv.ValidateDatabase().Errors...)
errors = append(errors, cv.ValidateNetwork().Errors...)
errors = append(errors, cv.ValidateLogging().Errors...)
return &ValidatorResult{
Strict: cv.Strict,
Errors: errors,
}
}
func (cv *ConfigValidator) ValidateProfile() *ValidatorResult {
errors := make([]*ValidateError, 0)
errors = append(errors, cv.validateProfileDefault()...)
errors = append(errors, cv.validateProfileDynamic()...)
return &ValidatorResult{
Strict: cv.Strict,
Errors: errors,
}
}
func (cv *ConfigValidator) validateProfileDefault() []*ValidateError {
profileDefault := cv.Config.Profile.Default
errors := make([]*ValidateError, 0)
if _, err := utils.PasswordToRegex(profileDefault.Password); err != nil {
errors = append(errors, newValidateError("profile.default", "Password", profileDefault.Password, "not a valid regex string", err))
}
networkMode := docker.NetworkMode(profileDefault.NetworkMode)
if docker.Off > networkMode || networkMode > docker.None {
errors = append(errors, newValidateError("profile.default", "NetworkMode", profileDefault.NetworkMode, "not a valid network mode", nil))
}
runLevel := docker.RunLevel(profileDefault.RunLevel)
if docker.User > runLevel || runLevel > docker.Forever {
errors = append(errors, newValidateError("profile.default", "RunLevel", profileDefault.RunLevel, "is not a valid run level", nil))
}
return errors
}
func (cv *ConfigValidator) validateProfileDynamic() []*ValidateError {
profileDynamic := cv.Config.Profile.Dynamic
errors := make([]*ValidateError, 0)
if !profileDynamic.Enable && !cv.Strict {
return errors
}
if _, err := utils.PasswordToRegex(profileDynamic.Password); err != nil {
errors = append(errors, newValidateError("profile.dynamic", "Password", profileDynamic.Password, "not a valid regex string", err))
}
networkMode := docker.NetworkMode(profileDynamic.NetworkMode)
if docker.Off > networkMode || networkMode > docker.None {
errors = append(errors, newValidateError("profile.dynamic", "NetworkMode", profileDynamic.NetworkMode, "not a valid network mode", nil))
}
runLevel := docker.RunLevel(profileDynamic.RunLevel)
if docker.User > runLevel || runLevel > docker.Forever {
errors = append(errors, newValidateError("profile.dynamic", "RunLevel", profileDynamic.RunLevel, "is not a valid run level", nil))
}
return errors
}
func (cv *ConfigValidator) ValidateAPI() *ValidatorResult {
api := cv.Config.Api
errors := make([]*ValidateError, 0)
if cv.Strict && !isPortFree(api.Port) {
errors = append(errors, newValidateError("api", "Port", api.Port, "port is already in use", nil))
}
errors = append(errors, cv.validateAPIConfigure().Errors...)
return &ValidatorResult{
Strict: cv.Strict,
Errors: errors,
}
}
func (cv *ConfigValidator) validateAPIConfigure() *ValidatorResult {
apiConfigure := cv.Config.Api.Configure
errors := make([]*ValidateError, 0)
for k, v := range map[string]string{"Binary": apiConfigure.Binary, "Man": apiConfigure.Man} {
path := absolutePath("", v)
if msg, err, ok := fileOk(path); !ok {
errors = append(errors, newValidateError("api.configure", k, path, msg, err))
}
}
return &ValidatorResult{
Strict: cv.Strict,
Errors: errors,
}
}
func (cv *ConfigValidator) ValidateSSH() *ValidatorResult {
ssh := cv.Config.SSH
errors := make([]*ValidateError, 0)
if cv.Strict && !isPortFree(ssh.Port) {
errors = append(errors, newValidateError("api", "Port", ssh.Port, "port is already in use", nil))
}
path := absolutePath("", ssh.Keyfile)
if msg, err, ok := fileOk(path); !ok {
errors = append(errors, newValidateError("ssh", "Keyfile", path, msg, err))
} else {
keyBytes, err := ioutil.ReadFile(path)
if err != nil {
panic(fmt.Sprintf("failed to read file %s: %v", path, err))
}
if ssh.Passphrase == "" {
if _, err = s.ParsePrivateKey(keyBytes); err != nil {
errors = append(errors, newValidateError("ssh", "Passphrase", ssh.Passphrase, "failed to parse ssh keyfile without password", err))
}
} else {
if _, err = s.ParsePrivateKeyWithPassphrase(keyBytes, []byte(ssh.Passphrase)); err != nil {
errors = append(errors, newValidateError("ssh", "Passphrase", ssh.Passphrase, "failed to parse ssh keyfile with password", err))
}
}
}
return &ValidatorResult{
Strict: cv.Strict,
Errors: errors,
}
}
func (cv *ConfigValidator) ValidateDatabase() *ValidatorResult {
database := cv.Config.Database
errors := make([]*ValidateError, 0)
path := absolutePath("", database.Sqlite3File)
if msg, err, ok := fileOk(path); !ok {
errors = append(errors, newValidateError("database", "Sqlite3File", path, msg, err))
}
// TODO: implement sql database schema
return &ValidatorResult{
Strict: cv.Strict,
Errors: errors,
}
}
func (cv *ConfigValidator) ValidateNetwork() *ValidatorResult {
network := cv.Config.Network
errors := make([]*ValidateError, 0)
if strings.Index(network.Default.Subnet, "/") == -1 {
errors = append(errors, newValidateError("network.default", "Subnet", network.Default.Subnet, "no network mask is given", nil))
} else if subnet, _, err := net.ParseCIDR(network.Default.Subnet); err != nil {
errors = append(errors, newValidateError("network.default", "Subnet", network.Default.Subnet, "invalid subnet ip", err))
} else if subnet == nil {
errors = append(errors, newValidateError("network.default", "Subnet", network.Default.Subnet, "invalid subnet ip", nil))
}
if strings.Index(network.Isolate.Subnet, "/") == -1 {
errors = append(errors, newValidateError("network.isolate", "Subnet", network.Isolate.Subnet, "no network mask is given", nil))
} else if subnet, _, err := net.ParseCIDR(network.Isolate.Subnet); err != nil {
errors = append(errors, newValidateError("network.isolate", "Subnet", network.Isolate.Subnet, "invalid subnet ip", err))
} else if subnet == nil {
errors = append(errors, newValidateError("network.isolate", "Subnet", network.Isolate.Subnet, "invalid subnet ip", nil))
}
return &ValidatorResult{
Strict: cv.Strict,
Errors: errors,
}
}
func (cv *ConfigValidator) ValidateLogging() *ValidatorResult {
logging := cv.Config.Logging
errors := make([]*ValidateError, 0)
level := zap.NewAtomicLevel()
if err := level.UnmarshalText([]byte(logging.Level)); err != nil {
errors = append(errors, newValidateError("logging", "Level", logging.Level, "invalid level", err))
}
if cv.Strict {
path := absolutePath("", logging.OutputFile)
if msg, err, ok := fileOk(path); !ok {
errors = append(errors, newValidateError("logging", "OutputFile", logging.OutputFile, msg, err))
}
path = absolutePath("", logging.ErrorFile)
if msg, err, ok := fileOk(path); !ok {
errors = append(errors, newValidateError("logging", "ErrorFile", logging.ErrorFile, msg, err))
}
}
return &ValidatorResult{
Strict: cv.Strict,
Errors: errors,
}
}
func isPortFree(port uint16) bool {
listener, err := net.Listen("tcp", fmt.Sprintf(":%d", port))
if listener != nil {
listener.Close()
}
return err == nil && port != 0
}
func absolutePath(parentPath, filePath string) (path string) {
if filepath.IsAbs(filePath) {
path = filePath
} else {
path = filepath.Join(parentPath, filePath)
}
return
}
func fileOk(path string) (string, error, bool) {
if info, err := os.Stat(path); os.IsNotExist(err) {
return "file does not exist", err, false
} else if info.IsDir() {
return "file is an directory", nil, false
} else if err != nil {
return "unexpected error", err, false
}
return "", nil, true
}

64
server/validate/validate_profile.go Normal file
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package validate
import (
"context"
"docker4ssh/config"
"docker4ssh/docker"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/client"
)
func NewProfileValidator(cli *client.Client, strict bool, profile *config.Profile) *ProfileValidator {
return &ProfileValidator{
Validator: &Validator{
Cli: cli,
Strict: strict,
},
Profile: profile,
}
}
type ProfileValidator struct {
*Validator
Profile *config.Profile
}
func (pv *ProfileValidator) Validate() *ValidatorResult {
profile := pv.Profile
errors := make([]*ValidateError, 0)
networkMode := docker.NetworkMode(profile.NetworkMode)
if docker.Off > networkMode || networkMode > docker.None {
errors = append(errors, newValidateError(profile.Name(), "NetworkMode", profile.NetworkMode, "not a valid network mode", nil))
}
runLevel := docker.RunLevel(profile.RunLevel)
if docker.User > runLevel || runLevel > docker.Forever {
errors = append(errors, newValidateError(profile.Name(), "RunLevel", profile.RunLevel, "is not a valid run level", nil))
}
if profile.Image == "" && profile.ContainerID == "" {
errors = append(errors, newValidateError(profile.Name(), "image/container", "", "Image OR Container must be specified, neither both nor none", nil))
} else if pv.Strict {
if profile.Image != "" {
list, err := pv.Cli.ImageList(context.Background(), types.ImageListOptions{
Filters: filters.NewArgs(filters.Arg("reference", profile.Image)),
})
if err != nil || len(list) == 0 {
errors = append(errors, newValidateError(profile.Name(), "Image", profile.Image, "image does not exist", nil))
}
} else if profile.ContainerID != "" {
list, err := pv.Cli.ContainerList(context.Background(), types.ContainerListOptions{
Filters: filters.NewArgs(filters.Arg("id", profile.ContainerID)),
})
if err != nil || len(list) == 0 {
errors = append(errors, newValidateError(profile.Name(), "Image", profile.Image, "container does not exist", nil))
}
}
}
return &ValidatorResult{
Strict: pv.Strict,
Errors: errors,
}
}