aerogramme/src/main.rs
2023-12-27 18:33:06 +01:00

396 lines
13 KiB
Rust

#![feature(async_fn_in_trait)]
mod bayou;
mod config;
mod cryptoblob;
mod imap;
mod k2v_util;
mod lmtp;
mod login;
mod mail;
mod server;
mod storage;
mod timestamp;
use std::io::Read;
use std::path::PathBuf;
use anyhow::{bail, Context, Result};
use clap::{Parser, Subcommand};
use nix::{sys::signal, unistd::Pid};
use config::*;
use login::{static_provider::*, *};
use server::Server;
#[derive(Parser, Debug)]
#[clap(author, version, about, long_about = None)]
struct Args {
#[clap(subcommand)]
command: Command,
/// A special mode dedicated to developers, NOT INTENDED FOR PRODUCTION
#[clap(long)]
dev: bool,
#[clap(short, long, env = "CONFIG_FILE", default_value = "aerogramme.toml")]
/// Path to the main Aerogramme configuration file
config_file: PathBuf,
}
#[derive(Subcommand, Debug)]
enum Command {
#[clap(subcommand)]
/// A daemon to be run by the end user, on a personal device
Companion(CompanionCommand),
#[clap(subcommand)]
/// A daemon to be run by the service provider, on a server
Provider(ProviderCommand),
#[clap(subcommand)]
/// Specific tooling, should not be part of a normal workflow, for debug & experimentation only
Tools(ToolsCommand),
//Test,
}
#[derive(Subcommand, Debug)]
enum ToolsCommand {
/// Manage crypto roots
#[clap(subcommand)]
CryptoRoot(CryptoRootCommand),
PasswordHash {
#[clap(env = "AEROGRAMME_PASSWORD")]
maybe_password: Option<String>,
},
}
#[derive(Subcommand, Debug)]
enum CryptoRootCommand {
/// Generate a new crypto-root protected with a password
New {
#[clap(env = "AEROGRAMME_PASSWORD")]
maybe_password: Option<String>,
},
/// Generate a new clear text crypto-root, store it securely!
NewClearText,
/// Change the password of a crypto key
ChangePassword {
#[clap(env = "AEROGRAMME_OLD_PASSWORD")]
maybe_old_password: Option<String>,
#[clap(env = "AEROGRAMME_NEW_PASSWORD")]
maybe_new_password: Option<String>,
#[clap(short, long, env = "AEROGRAMME_CRYPTO_ROOT")]
crypto_root: String,
},
/// From a given crypto-key, derive one containing only the public key
DeriveIncoming {
#[clap(short, long, env = "AEROGRAMME_CRYPTO_ROOT")]
crypto_root: String,
},
}
#[derive(Subcommand, Debug)]
enum CompanionCommand {
/// Runs the IMAP proxy
Daemon,
Reload {
#[clap(short, long, env = "AEROGRAMME_PID")]
pid: Option<i32>,
},
Wizard,
#[clap(subcommand)]
Account(AccountManagement),
}
#[derive(Subcommand, Debug)]
enum ProviderCommand {
/// Runs the IMAP+LMTP server daemon
Daemon,
/// Reload the daemon
Reload {
#[clap(short, long, env = "AEROGRAMME_PID")]
pid: Option<i32>,
},
/// Manage static accounts
#[clap(subcommand)]
Account(AccountManagement),
}
#[derive(Subcommand, Debug)]
enum AccountManagement {
/// Add an account
Add {
#[clap(short, long)]
login: String,
#[clap(short, long)]
setup: PathBuf,
},
/// Delete an account
Delete {
#[clap(short, long)]
login: String,
},
/// Change password for a given account
ChangePassword {
#[clap(env = "AEROGRAMME_OLD_PASSWORD")]
maybe_old_password: Option<String>,
#[clap(env = "AEROGRAMME_NEW_PASSWORD")]
maybe_new_password: Option<String>,
#[clap(short, long)]
login: String,
},
}
#[tokio::main]
async fn main() -> Result<()> {
if std::env::var("RUST_LOG").is_err() {
std::env::set_var("RUST_LOG", "main=info,aerogramme=info,k2v_client=info")
}
// Abort on panic (same behavior as in Go)
std::panic::set_hook(Box::new(|panic_info| {
eprintln!("{}", panic_info);
eprintln!("{:?}", backtrace::Backtrace::new());
std::process::abort();
}));
tracing_subscriber::fmt::init();
let args = Args::parse();
let any_config = if args.dev {
use std::net::*;
AnyConfig::Provider(ProviderConfig {
pid: None,
imap: ImapConfig {
bind_addr: SocketAddr::new(IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1)), 1143),
},
lmtp: LmtpConfig {
bind_addr: SocketAddr::new(IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1)), 1025),
hostname: "example.tld".to_string(),
},
users: UserManagement::Demo,
})
} else {
read_config(args.config_file)?
};
match (&args.command, any_config) {
(Command::Companion(subcommand), AnyConfig::Companion(config)) => match subcommand {
CompanionCommand::Daemon => {
let server = Server::from_companion_config(config).await?;
server.run().await?;
}
CompanionCommand::Reload { pid } => reload(*pid, config.pid)?,
CompanionCommand::Wizard => {
unimplemented!();
}
CompanionCommand::Account(cmd) => {
let user_file = config.users.user_list;
account_management(&args.command, cmd, user_file)?;
}
},
(Command::Provider(subcommand), AnyConfig::Provider(config)) => match subcommand {
ProviderCommand::Daemon => {
let server = Server::from_provider_config(config).await?;
server.run().await?;
}
ProviderCommand::Reload { pid } => reload(*pid, config.pid)?,
ProviderCommand::Account(cmd) => {
let user_file = match config.users {
UserManagement::Static(conf) => conf.user_list,
_ => {
panic!("Only static account management is supported from Aerogramme.")
}
};
account_management(&args.command, cmd, user_file)?;
}
},
(Command::Provider(_), AnyConfig::Companion(_)) => {
bail!("Your want to run a 'Provider' command but your configuration file has role 'Companion'.");
}
(Command::Companion(_), AnyConfig::Provider(_)) => {
bail!("Your want to run a 'Companion' command but your configuration file has role 'Provider'.");
}
(Command::Tools(subcommand), _) => match subcommand {
ToolsCommand::PasswordHash { maybe_password } => {
let password = match maybe_password {
Some(pwd) => pwd.clone(),
None => rpassword::prompt_password("Enter password: ")?,
};
println!("{}", hash_password(&password)?);
}
ToolsCommand::CryptoRoot(crcommand) => match crcommand {
CryptoRootCommand::New { maybe_password } => {
let password = match maybe_password {
Some(pwd) => pwd.clone(),
None => {
let password = rpassword::prompt_password("Enter password: ")?;
let password_confirm =
rpassword::prompt_password("Confirm password: ")?;
if password != password_confirm {
bail!("Passwords don't match.");
}
password
}
};
let crypto_keys = CryptoKeys::init();
let cr = CryptoRoot::create_pass(&password, &crypto_keys)?;
println!("{}", cr.0);
}
CryptoRootCommand::NewClearText => {
let crypto_keys = CryptoKeys::init();
let cr = CryptoRoot::create_cleartext(&crypto_keys);
println!("{}", cr.0);
}
CryptoRootCommand::ChangePassword {
maybe_old_password,
maybe_new_password,
crypto_root,
} => {
let old_password = match maybe_old_password {
Some(pwd) => pwd.to_string(),
None => rpassword::prompt_password("Enter old password: ")?,
};
let new_password = match maybe_new_password {
Some(pwd) => pwd.to_string(),
None => {
let password = rpassword::prompt_password("Enter new password: ")?;
let password_confirm =
rpassword::prompt_password("Confirm new password: ")?;
if password != password_confirm {
bail!("Passwords don't match.");
}
password
}
};
let keys = CryptoRoot(crypto_root.to_string()).crypto_keys(&old_password)?;
let cr = CryptoRoot::create_pass(&new_password, &keys)?;
println!("{}", cr.0);
}
CryptoRootCommand::DeriveIncoming { crypto_root } => {
let pubkey = CryptoRoot(crypto_root.to_string()).public_key()?;
let cr = CryptoRoot::create_incoming(&pubkey);
println!("{}", cr.0);
}
},
},
}
Ok(())
}
fn reload(pid: Option<i32>, pid_path: Option<PathBuf>) -> Result<()> {
let final_pid = match (pid, pid_path) {
(Some(pid), _) => pid,
(_, Some(path)) => {
let mut f = std::fs::OpenOptions::new().read(true).open(path)?;
let mut pidstr = String::new();
f.read_to_string(&mut pidstr)?;
pidstr.parse::<i32>()?
}
_ => bail!("Unable to infer your daemon's PID"),
};
let pid = Pid::from_raw(final_pid);
signal::kill(pid, signal::Signal::SIGUSR1)?;
Ok(())
}
fn account_management(root: &Command, cmd: &AccountManagement, users: PathBuf) -> Result<()> {
let mut ulist: UserList =
read_config(users.clone()).context(format!("'{:?}' must be a user database", users))?;
match cmd {
AccountManagement::Add { login, setup } => {
tracing::debug!(user = login, "will-create");
let stp: SetupEntry = read_config(setup.clone())
.context(format!("'{:?}' must be a setup file", setup))?;
tracing::debug!(user = login, "loaded setup entry");
let password = match stp.clear_password {
Some(pwd) => pwd,
None => {
let password = rpassword::prompt_password("Enter password: ")?;
let password_confirm = rpassword::prompt_password("Confirm password: ")?;
if password != password_confirm {
bail!("Passwords don't match.");
}
password
}
};
let crypto_keys = CryptoKeys::init();
let crypto_root = match root {
Command::Provider(_) => CryptoRoot::create_pass(&password, &crypto_keys)?,
Command::Companion(_) => CryptoRoot::create_cleartext(&crypto_keys),
_ => unreachable!(),
};
let hash = hash_password(password.as_str()).context("unable to hash password")?;
ulist.insert(
login.clone(),
UserEntry {
email_addresses: stp.email_addresses,
password: hash,
crypto_root: crypto_root.0,
storage: stp.storage,
},
);
write_config(users.clone(), &ulist)?;
}
AccountManagement::Delete { login } => {
tracing::debug!(user = login, "will-delete");
ulist.remove(login);
write_config(users.clone(), &ulist)?;
}
AccountManagement::ChangePassword {
maybe_old_password,
maybe_new_password,
login,
} => {
let mut user = ulist.remove(login).context("user must exist first")?;
let old_password = match maybe_old_password {
Some(pwd) => pwd.to_string(),
None => rpassword::prompt_password("Enter old password: ")?,
};
if !verify_password(&old_password, &user.password)? {
bail!(format!("invalid password for login {}", login));
}
let crypto_keys = CryptoRoot(user.crypto_root).crypto_keys(&old_password)?;
let new_password = match maybe_new_password {
Some(pwd) => pwd.to_string(),
None => {
let password = rpassword::prompt_password("Enter new password: ")?;
let password_confirm = rpassword::prompt_password("Confirm new password: ")?;
if password != password_confirm {
bail!("Passwords don't match.");
}
password
}
};
let new_hash = hash_password(&new_password)?;
let new_crypto_root = CryptoRoot::create_pass(&new_password, &crypto_keys)?;
user.password = new_hash;
user.crypto_root = new_crypto_root.0;
ulist.insert(login.clone(), user);
write_config(users.clone(), &ulist)?;
}
};
Ok(())
}