use std::collections::HashMap; use std::sync::Arc; use std::path::PathBuf; use tokio::sync::watch; use tokio::signal::unix::{signal, SignalKind}; use anyhow::{anyhow, bail, Result}; use async_trait::async_trait; use crate::config::*; use crate::login::*; use crate::storage; pub struct ContextualUserEntry { pub username: String, pub config: UserEntry, } #[derive(Default)] pub struct UserDatabase { users: HashMap>, users_by_email: HashMap>, } pub struct StaticLoginProvider { user_db: watch::Receiver, in_memory_store: storage::in_memory::MemDb, } pub async fn update_user_list(config: PathBuf, up: watch::Sender) -> Result<()> { let mut stream = signal(SignalKind::user_defined1()).expect("failed to install SIGUSR1 signal hander for reload"); loop { let ulist: UserList = match read_config(config.clone()) { Ok(x) => x, Err(e) => { tracing::warn!(path=%config.as_path().to_string_lossy(), error=%e, "Unable to load config"); stream.recv().await; continue; } }; let users = ulist .into_iter() .map(|(username, config)| (username.clone() , Arc::new(ContextualUserEntry { username, config }))) .collect::>(); let mut users_by_email = HashMap::new(); for (_, u) in users.iter() { for m in u.config.email_addresses.iter() { if users_by_email.contains_key(m) { tracing::warn!("Several users have the same email address: {}", m); stream.recv().await; continue } users_by_email.insert(m.clone(), u.clone()); } } tracing::info!("{} users loaded", users.len()); up.send(UserDatabase { users, users_by_email }).context("update user db config")?; stream.recv().await; tracing::info!("Received SIGUSR1, reloading"); } } impl StaticLoginProvider { pub async fn new(config: LoginStaticConfig) -> Result { let (tx, mut rx) = watch::channel(UserDatabase::default()); tokio::spawn(update_user_list(config.user_list, tx)); rx.changed().await?; Ok(Self { user_db: rx, in_memory_store: storage::in_memory::MemDb::new() }) } } #[async_trait] impl LoginProvider for StaticLoginProvider { async fn login(&self, username: &str, password: &str) -> Result { tracing::debug!(user=%username, "login"); let user = { let user_db = self.user_db.borrow(); match user_db.users.get(username) { None => bail!("User {} does not exist", username), Some(u) => u.clone(), } }; tracing::debug!(user=%username, "verify password"); if !verify_password(password, &user.config.password)? { bail!("Wrong password"); } tracing::debug!(user=%username, "fetch keys"); let storage: storage::Builder = match &user.config.storage { StaticStorage::InMemory => self.in_memory_store.builder(username).await, StaticStorage::Garage(grgconf) => storage::garage::GarageBuilder::new(storage::garage::GarageConf { region: grgconf.aws_region.clone(), k2v_endpoint: grgconf.k2v_endpoint.clone(), s3_endpoint: grgconf.s3_endpoint.clone(), aws_access_key_id: grgconf.aws_access_key_id.clone(), aws_secret_access_key: grgconf.aws_secret_access_key.clone(), bucket: grgconf.bucket.clone(), })?, }; let cr = CryptoRoot(user.config.crypto_root.clone()); let keys = cr.crypto_keys(password)?; tracing::debug!(user=%username, "logged"); Ok(Credentials { storage, keys }) } async fn public_login(&self, email: &str) -> Result { let user = { let user_db = self.user_db.borrow(); match user_db.users_by_email.get(email) { None => bail!("Email {} does not exist", email), Some(u) => u.clone(), } }; tracing::debug!(user=%user.username, "public_login"); let storage: storage::Builder = match &user.config.storage { StaticStorage::InMemory => self.in_memory_store.builder(&user.username).await, StaticStorage::Garage(grgconf) => storage::garage::GarageBuilder::new(storage::garage::GarageConf { region: grgconf.aws_region.clone(), k2v_endpoint: grgconf.k2v_endpoint.clone(), s3_endpoint: grgconf.s3_endpoint.clone(), aws_access_key_id: grgconf.aws_access_key_id.clone(), aws_secret_access_key: grgconf.aws_secret_access_key.clone(), bucket: grgconf.bucket.clone(), })?, }; let cr = CryptoRoot(user.config.crypto_root.clone()); let public_key = cr.public_key()?; Ok(PublicCredentials { storage, public_key, }) } } pub fn hash_password(password: &str) -> Result { use argon2::{ password_hash::{rand_core::OsRng, PasswordHasher, SaltString}, Argon2, }; let salt = SaltString::generate(&mut OsRng); let argon2 = Argon2::default(); Ok(argon2 .hash_password(password.as_bytes(), &salt) .map_err(|e| anyhow!("Argon2 error: {}", e))? .to_string()) } pub fn verify_password(password: &str, hash: &str) -> Result { use argon2::{ password_hash::{PasswordHash, PasswordVerifier}, Argon2, }; let parsed_hash = PasswordHash::new(hash).map_err(|e| anyhow!("Invalid hashed password: {}", e))?; Ok(Argon2::default() .verify_password(password.as_bytes(), &parsed_hash) .is_ok()) }