1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
// Copyright (C) 2026 Doan Luu Duc Tai <doan@luuduct.ai>
//
// 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 <https://www.gnu.org/licenses/>.
#![doc = "Encrypted private chat server and backend maintenance commands."]
mod http;
mod maintenance;
mod service;
mod store;
use anyhow::{Context, Result, ensure};
use clap::Parser;
use std::io::{Read, Write};
use std::net::SocketAddr;
use std::path::PathBuf;
use std::process::ExitCode;
#[derive(Debug, Parser)]
#[command(about = "Run private chat directly or behind the stack gateway")]
struct Arguments {
#[arg(long, default_value = ".")]
root: PathBuf,
#[command(flatten)]
listener: Listener,
#[arg(
long,
help = "Check the local HTTP health endpoint without opening the database"
)]
healthcheck: bool,
#[arg(long, conflicts_with_all = ["reset_owner", "owner_fingerprint", "snapshot"])]
init: bool,
#[arg(long, value_name = "FINGERPRINT", conflicts_with_all = ["owner_fingerprint", "snapshot"], help = "Permanently clear the matching owner registration and all chat history after key loss")]
reset_owner: Option<String>,
#[arg(
long,
conflicts_with = "snapshot",
help = "Print the registered owner's public fingerprint"
)]
owner_fingerprint: bool,
#[arg(long)]
snapshot: Option<PathBuf>,
}
#[derive(Debug, clap::Args)]
struct Listener {
#[arg(long)]
bind: Option<SocketAddr>,
#[arg(
long,
help = "Run behind the stack gateway using its explicit container environment"
)]
proxy: bool,
}
fn initialize(root: &std::path::Path) -> Result<()> {
let env = root.join(".env");
let existing = if env.exists() {
std::fs::read_to_string(&env)?
} else {
String::new()
};
ensure!(
!existing
.lines()
.any(|line| line.starts_with("CHAT_SETUP_TOKEN=")),
"CHAT_SETUP_TOKEN already exists"
);
let mut file = std::fs::OpenOptions::new()
.create(true)
.append(true)
.open(&env)?;
std::fs::set_permissions(&env, std::os::unix::fs::PermissionsExt::from_mode(0o600))?;
writeln!(file, "\nCHAT_SETUP_TOKEN={}", service::token()?)?;
if !existing
.lines()
.any(|line| line.starts_with("CHAT_ORIGIN="))
{
writeln!(file, "CHAT_ORIGIN=http://127.0.0.1:9080")?;
}
stack_config::initialize_public(root)
}
fn healthcheck(mut address: SocketAddr) -> Result<()> {
if address.ip().is_unspecified() {
address.set_ip(std::net::IpAddr::V4(std::net::Ipv4Addr::LOCALHOST));
}
let mut socket =
std::net::TcpStream::connect_timeout(&address, std::time::Duration::from_secs(2))?;
socket.set_read_timeout(Some(std::time::Duration::from_secs(2)))?;
socket.set_write_timeout(Some(std::time::Duration::from_secs(2)))?;
socket.write_all(b"GET /healthz HTTP/1.0\r\nHost: localhost\r\n\r\n")?;
let mut response = String::new();
socket.take(8192).read_to_string(&mut response)?;
ensure!(
response.starts_with("HTTP/1.0 200") || response.starts_with("HTTP/1.1 200"),
"Chat health endpoint failed"
);
Ok(())
}
fn validate_origin(
configuration: &stack_config::Config,
bind: SocketAddr,
proxy: bool,
) -> Result<()> {
let origin = configuration.value("CHAT_ORIGIN")?;
if proxy {
let public = configuration.public_values(None)?;
let canonical = public
.get("CHAT_PUBLIC_ORIGIN")
.context("Missing public chat origin")?;
let local = format!(
"http://{}:{}",
configuration.value("CHAT_LOCAL_HOST")?,
configuration.port("LOCAL_HTTP_PORT")?
);
ensure!(
origin == canonical || origin == local,
"Gateway chat origin must match the configured HTTPS hostname or dedicated local hostname"
);
} else {
ensure!(
bind.ip().is_loopback() && origin == format!("http://{bind}"),
"Direct development chat requires an exact loopback HTTP origin"
);
}
Ok(())
}
async fn run(arguments: Arguments) -> Result<()> {
let root = arguments.root.canonicalize()?;
if arguments.init {
return initialize(&root);
}
let configuration = if arguments.listener.proxy {
stack_config::Config::from_environment()?
} else {
stack_config::Config::load(&root)?
};
let bind = arguments
.listener
.bind
.unwrap_or(configuration.chat_bind()?);
if arguments.healthcheck {
return healthcheck(bind);
}
let data = root.join("var/data/chat");
std::fs::create_dir_all(&data)?;
std::fs::set_permissions(&data, std::os::unix::fs::PermissionsExt::from_mode(0o700))?;
let database = data.join("chat.sqlite");
let _server_lock = if arguments.snapshot.is_none() && !arguments.owner_fingerprint {
Some(maintenance::lock(&data)?)
} else {
None
};
let mut store = store::Store::open(&database)?;
std::fs::set_permissions(
&database,
std::os::unix::fs::PermissionsExt::from_mode(0o600),
)?;
if arguments.owner_fingerprint {
return maintenance::fingerprint(&store);
}
if let Some(expected) = arguments.reset_owner {
return maintenance::reset(&mut store, &expected, bind, arguments.listener.proxy);
}
if let Some(destination) = arguments.snapshot {
store.snapshot(&destination)?;
std::fs::set_permissions(
destination,
std::os::unix::fs::PermissionsExt::from_mode(0o600),
)?;
return Ok(());
}
let origin = configuration.value("CHAT_ORIGIN")?;
validate_origin(&configuration, bind, arguments.listener.proxy)?;
let setup = configuration
.value("CHAT_SETUP_TOKEN")
.context("Run --init to configure chat")?;
let state = service::Service::new(store, origin.to_owned(), setup.to_owned());
let listener = tokio::net::TcpListener::bind(bind).await?;
writeln!(
std::io::stdout().lock(),
"Chat ready: {origin} (owner setup: /#setup)"
)?;
let local = (arguments.listener.proxy && origin.starts_with("http://"))
.then(|| configuration.port("LOCAL_HTTP_PORT"))
.transpose()?;
http::serve(listener, state, &root, configuration.public_values(local)?).await
}
#[tokio::main]
async fn main() -> ExitCode {
match run(Arguments::parse()).await {
Ok(()) => ExitCode::SUCCESS,
Err(error) => {
drop(writeln!(
std::io::stderr().lock(),
"Chat server failed: {error:#}"
));
ExitCode::FAILURE
}
}
}
|
