mirror of
https://github.com/kanidm/kanidm.git
synced 2025-06-06 08:07:47 +02:00
b113262357
It was possible that a token could be updated in a way that caused existing cached information to be lost if an event was delayed in it's write to the user token. To prevent this, the writes to user tokens now require the HsmLock to be held, and refresh the token just ahead of writing to ensure that these data can't be lost. The benefit to this approach is that readers remain unblocked by a writer.
1381 lines
49 KiB
Rust
1381 lines
49 KiB
Rust
// use async_trait::async_trait;
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use crate::db::{Cache, Db};
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use crate::idprovider::interface::{
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AuthCredHandler,
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AuthResult,
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GroupToken,
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GroupTokenState,
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Id,
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IdProvider,
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IdpError,
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ProviderOrigin,
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// KeyStore,
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UserToken,
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UserTokenState,
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};
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use crate::idprovider::system::{
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Shadow, SystemAuthResult, SystemProvider, SystemProviderAuthInit, SystemProviderSession,
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};
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use hashbrown::HashMap;
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use kanidm_unix_common::constants::DEFAULT_SHELL_SEARCH_PATHS;
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use kanidm_unix_common::unix_config::{HomeAttr, UidAttr};
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use kanidm_unix_common::unix_passwd::{EtcGroup, EtcShadow, EtcUser};
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use kanidm_unix_common::unix_proto::{
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HomeDirectoryInfo, NssGroup, NssUser, PamAuthRequest, PamAuthResponse, PamServiceInfo,
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ProviderStatus,
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};
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use lru::LruCache;
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use std::fmt::Display;
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use std::num::NonZeroUsize;
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use std::ops::DerefMut;
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use std::path::{Path, PathBuf};
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use std::string::ToString;
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use std::sync::Arc;
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use std::time::{Duration, SystemTime};
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use time::OffsetDateTime;
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use tokio::sync::Mutex;
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use uuid::Uuid;
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use kanidm_hsm_crypto::BoxedDynTpm;
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use tokio::sync::broadcast;
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const NXCACHE_SIZE: NonZeroUsize = unsafe { NonZeroUsize::new_unchecked(128) };
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pub enum AuthSession {
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Online {
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client: Arc<dyn IdProvider + Sync + Send>,
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account_id: String,
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id: Id,
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cred_handler: AuthCredHandler,
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/// Some authentication operations may need to spawn background tasks. These tasks need
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/// to know when to stop as the caller has disconnected. This receiver allows that, so
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/// that tasks which .resubscribe() to this channel can then select! on it and be notified
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/// when they need to stop.
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shutdown_rx: broadcast::Receiver<()>,
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},
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Offline {
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account_id: String,
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id: Id,
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client: Arc<dyn IdProvider + Sync + Send>,
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session_token: Box<UserToken>,
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cred_handler: AuthCredHandler,
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},
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System {
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account_id: String,
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id: Id,
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cred_handler: AuthCredHandler,
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shadow: Arc<Shadow>,
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},
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Success,
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Denied,
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}
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pub struct Resolver {
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// Generic / modular types.
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db: Db,
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hsm: Mutex<BoxedDynTpm>,
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// A local passwd/shadow resolver.
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system_provider: Arc<SystemProvider>,
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// client: Box<dyn IdProvider + Sync + Send>,
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client_ids: HashMap<ProviderOrigin, Arc<dyn IdProvider + Sync + Send>>,
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// A set of remote resolvers, ordered by priority.
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clients: Vec<Arc<dyn IdProvider + Sync + Send>>,
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// The id of the primary-provider which may use name over spn.
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primary_origin: ProviderOrigin,
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timeout_seconds: u64,
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default_shell: String,
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home_prefix: PathBuf,
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home_attr: HomeAttr,
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home_alias: Option<HomeAttr>,
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uid_attr_map: UidAttr,
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gid_attr_map: UidAttr,
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nxcache: Mutex<LruCache<Id, SystemTime>>,
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}
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impl Display for Id {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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f.write_str(&match self {
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Id::Name(s) => s.to_string(),
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Id::Gid(g) => g.to_string(),
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})
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}
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}
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impl Resolver {
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#[allow(clippy::too_many_arguments)]
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pub async fn new(
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db: Db,
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system_provider: Arc<SystemProvider>,
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clients: Vec<Arc<dyn IdProvider + Sync + Send>>,
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hsm: BoxedDynTpm,
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timeout_seconds: u64,
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default_shell: String,
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home_prefix: PathBuf,
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home_attr: HomeAttr,
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home_alias: Option<HomeAttr>,
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uid_attr_map: UidAttr,
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gid_attr_map: UidAttr,
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) -> Result<Self, ()> {
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let hsm = Mutex::new(hsm);
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let primary_origin = clients.first().map(|c| c.origin()).unwrap_or_default();
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let client_ids: HashMap<_, _> = clients
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.iter()
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.map(|provider| (provider.origin(), provider.clone()))
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.collect();
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// We assume we are offline at start up, and we mark the next "online check" as
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// being valid from "now".
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Ok(Resolver {
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db,
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hsm,
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system_provider,
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clients,
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primary_origin,
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client_ids,
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timeout_seconds,
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default_shell,
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home_prefix,
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home_attr,
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home_alias,
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uid_attr_map,
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gid_attr_map,
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nxcache: Mutex::new(LruCache::new(NXCACHE_SIZE)),
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})
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}
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#[instrument(level = "debug", skip_all)]
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pub async fn mark_next_check_now(&self, now: SystemTime) {
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for c in self.clients.iter() {
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c.mark_next_check(now).await;
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}
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}
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#[instrument(level = "debug", skip_all)]
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pub async fn mark_offline(&self) {
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for c in self.clients.iter() {
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c.mark_offline().await;
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}
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}
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#[instrument(level = "debug", skip_all)]
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pub async fn clear_cache(&self) -> Result<(), ()> {
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let mut dbtxn = self.db.write().await;
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let mut nxcache_txn = self.nxcache.lock().await;
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nxcache_txn.clear();
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dbtxn.clear().and_then(|_| dbtxn.commit()).map_err(|_| ())
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}
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#[instrument(level = "debug", skip_all)]
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pub async fn invalidate(&self) -> Result<(), ()> {
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let mut dbtxn = self.db.write().await;
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let mut nxcache_txn = self.nxcache.lock().await;
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nxcache_txn.clear();
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dbtxn
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.invalidate()
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.and_then(|_| dbtxn.commit())
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.map_err(|_| ())
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}
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async fn get_cached_usertokens(&self) -> Result<Vec<UserToken>, ()> {
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let mut dbtxn = self.db.write().await;
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dbtxn.get_accounts().map_err(|_| ())
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}
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async fn get_cached_grouptokens(&self) -> Result<Vec<GroupToken>, ()> {
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let mut dbtxn = self.db.write().await;
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dbtxn.get_groups().map_err(|_| ())
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}
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async fn set_nxcache(&self, id: &Id) {
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let mut nxcache_txn = self.nxcache.lock().await;
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let ex_time = SystemTime::now() + Duration::from_secs(self.timeout_seconds);
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nxcache_txn.put(id.clone(), ex_time);
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}
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pub async fn check_nxcache(&self, id: &Id) -> Option<SystemTime> {
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let mut nxcache_txn = self.nxcache.lock().await;
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nxcache_txn.get(id).copied()
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}
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#[instrument(level = "info", skip_all)]
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pub async fn reload_system_identities(
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&self,
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users: Vec<EtcUser>,
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shadow: Vec<EtcShadow>,
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groups: Vec<EtcGroup>,
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) {
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self.system_provider.reload(users, shadow, groups).await
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}
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async fn get_cached_usertoken(&self, account_id: &Id) -> Result<(bool, Option<UserToken>), ()> {
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// Account_id could be:
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// * gidnumber
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// * name
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// * spn
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// * uuid
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// Attempt to search these in the db.
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let mut dbtxn = self.db.write().await;
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let r = dbtxn.get_account(account_id).map_err(|err| {
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debug!(?err, "get_cached_usertoken");
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})?;
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drop(dbtxn);
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match r {
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Some((ut, ex)) => {
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// Are we expired?
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let offset = Duration::from_secs(ex);
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let ex_time = SystemTime::UNIX_EPOCH + offset;
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let now = SystemTime::now();
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if now >= ex_time {
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Ok((true, Some(ut)))
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} else {
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Ok((false, Some(ut)))
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}
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}
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None => {
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// it wasn't in the DB - lets see if it's in the nxcache.
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match self.check_nxcache(account_id).await {
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Some(ex_time) => {
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let now = SystemTime::now();
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if now >= ex_time {
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// It's in the LRU, but we are past the expiry so
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// lets attempt a refresh.
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Ok((true, None))
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} else {
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// It's in the LRU and still valid, so return that
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// no check is needed.
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Ok((false, None))
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}
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}
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None => {
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// Not in the LRU. Return that this IS expired
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// and we have no data.
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Ok((true, None))
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}
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}
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}
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} // end match r
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}
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async fn get_cached_grouptoken(&self, grp_id: &Id) -> Result<(bool, Option<GroupToken>), ()> {
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// grp_id could be:
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// * gidnumber
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// * name
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// * spn
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// * uuid
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// Attempt to search these in the db.
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let mut dbtxn = self.db.write().await;
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let r = dbtxn.get_group(grp_id).map_err(|_| ())?;
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drop(dbtxn);
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match r {
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Some((ut, ex)) => {
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// Are we expired?
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let offset = Duration::from_secs(ex);
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let ex_time = SystemTime::UNIX_EPOCH + offset;
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let now = SystemTime::now();
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if now >= ex_time {
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Ok((true, Some(ut)))
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} else {
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Ok((false, Some(ut)))
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}
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}
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None => {
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// it wasn't in the DB - lets see if it's in the nxcache.
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match self.check_nxcache(grp_id).await {
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Some(ex_time) => {
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let now = SystemTime::now();
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if now >= ex_time {
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// It's in the LRU, but we are past the expiry so
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// lets attempt a refresh.
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Ok((true, None))
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} else {
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// It's in the LRU and still valid, so return that
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// no check is needed.
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Ok((false, None))
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}
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}
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None => {
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// Not in the LRU. Return that this IS expired
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// and we have no data.
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Ok((true, None))
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}
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}
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}
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}
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}
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async fn set_cache_usertoken(
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&self,
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token: &mut UserToken,
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// This is just for proof that only one write can occur at a time.
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_tpm: &mut BoxedDynTpm,
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) -> Result<(), ()> {
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// Set an expiry
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let ex_time = SystemTime::now() + Duration::from_secs(self.timeout_seconds);
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let offset = ex_time
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.duration_since(SystemTime::UNIX_EPOCH)
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.map_err(|e| {
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error!(
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"Time conversion error - cache expiry time became less than epoch? {:?}",
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e
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);
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})?;
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// Check if requested `shell` exists on the system, else use `default_shell`
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let maybe_shell = token.shell.as_ref().map(PathBuf::from);
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let requested_shell_exists = if let Some(shell_path) = maybe_shell.as_ref() {
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// Does the shell path as configured exist?
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let mut exists = shell_path
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.canonicalize()
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.map_err(|err| {
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debug!(
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"Failed to canonicalize path, using base path. Tried: {} Error: {:?}",
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shell_path.to_string_lossy(),
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err
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);
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})
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.unwrap_or(Path::new(shell_path).to_path_buf())
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.exists();
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if !exists {
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// Does the shell binary exist in a search path that is configured?
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if let Some(shell_binary_name) = shell_path.file_name() {
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for search_path in DEFAULT_SHELL_SEARCH_PATHS {
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//
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let shell_path = Path::new(search_path).join(shell_binary_name);
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if shell_path.exists() {
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// Okay, the binary name exists but in an alternate path. This can
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// commonly occur with freebsd where the shell may be installed
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// in /usr/local/bin instead of /bin.
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//
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// This could also occur if the user configured the shell as "zsh"
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// rather than an absolute path.
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let Some(shell_path_utf8) = shell_path.to_str().map(String::from)
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else {
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warn!("Configured shell \"{}\" for {} was found but the complete path is not valid utf-8 and can not be used.",
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shell_binary_name.to_string_lossy(), token.name);
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continue;
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};
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// Update the path
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token.shell = Some(shell_path_utf8);
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// We exist
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exists = true;
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// No need to loop any more
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break;
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}
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}
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}
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}
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if !exists {
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warn!(
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"Configured shell \"{}\" for {} is not present on this system. Check `/etc/shells` for valid shell options.",
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shell_path.to_string_lossy(), token.name
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)
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}
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exists
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} else {
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info!("User has not specified a shell, using default");
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false
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};
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|
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if !requested_shell_exists {
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token.shell = Some(self.default_shell.clone())
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}
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|
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let mut dbtxn = self.db.write().await;
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token
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.groups
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.iter()
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// We need to add the groups first
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.try_for_each(|g| dbtxn.update_group(g, offset.as_secs()))
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.and_then(|_|
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// So that when we add the account it can make the relationships.
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dbtxn
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.update_account(token, offset.as_secs()))
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.and_then(|_| dbtxn.commit())
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.map_err(|_| ())
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}
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|
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async fn set_cache_grouptoken(&self, token: &GroupToken) -> Result<(), ()> {
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// Set an expiry
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let ex_time = SystemTime::now() + Duration::from_secs(self.timeout_seconds);
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let offset = ex_time
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.duration_since(SystemTime::UNIX_EPOCH)
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|
.map_err(|e| {
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error!("time conversion error - ex_time less than epoch? {:?}", e);
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})?;
|
|
|
|
let mut dbtxn = self.db.write().await;
|
|
dbtxn
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|
.update_group(token, offset.as_secs())
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|
.and_then(|_| dbtxn.commit())
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|
.map_err(|_| ())
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|
}
|
|
|
|
async fn delete_cache_usertoken(&self, a_uuid: Uuid) -> Result<(), ()> {
|
|
let mut dbtxn = self.db.write().await;
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|
dbtxn
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|
.delete_account(a_uuid)
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|
.and_then(|_| dbtxn.commit())
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|
.map_err(|_| ())
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|
}
|
|
|
|
async fn delete_cache_grouptoken(&self, g_uuid: Uuid) -> Result<(), ()> {
|
|
let mut dbtxn = self.db.write().await;
|
|
dbtxn
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|
.delete_group(g_uuid)
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|
.and_then(|_| dbtxn.commit())
|
|
.map_err(|_| ())
|
|
}
|
|
|
|
async fn refresh_usertoken(
|
|
&self,
|
|
account_id: &Id,
|
|
token: Option<UserToken>,
|
|
) -> Result<Option<UserToken>, ()> {
|
|
// TODO: Move this to the caller.
|
|
let now = SystemTime::now();
|
|
|
|
let mut hsm_lock = self.hsm.lock().await;
|
|
|
|
// We need to re-acquire the token now behind the hsmlock - this is so that
|
|
// we know that as we write the updated token, we know that no one else has
|
|
// written to this token, since we are now the only task that is allowed
|
|
// to be in a write phase.
|
|
let token = if token.is_some() {
|
|
self.get_cached_usertoken(account_id)
|
|
.await
|
|
.map(|(_expired, option_token)| option_token)
|
|
.map_err(|err| {
|
|
debug!(?err, "get_usertoken error");
|
|
})?
|
|
} else {
|
|
// Was already none, leave it that way.
|
|
None
|
|
};
|
|
|
|
let user_get_result = if let Some(tok) = token.as_ref() {
|
|
// Re-use the provider that the token is from.
|
|
match self.client_ids.get(&tok.provider) {
|
|
Some(client) => {
|
|
client
|
|
.unix_user_get(account_id, token.as_ref(), hsm_lock.deref_mut(), now)
|
|
.await
|
|
}
|
|
None => {
|
|
error!(provider = ?tok.provider, "Token was resolved by a provider that no longer appears to be present.");
|
|
|
|
// We don't want to use a token from a former provider, we want it refreshed,
|
|
// so lets indicate that we didn't find the token. If we return useCcahed like
|
|
// we did previously, we'd never clear and reset this token since we'd never
|
|
// locate it's provider.
|
|
Ok(UserTokenState::NotFound)
|
|
}
|
|
}
|
|
} else {
|
|
// We've never seen it before, so iterate over the providers in priority order.
|
|
'search: {
|
|
for client in self.clients.iter() {
|
|
match client
|
|
.unix_user_get(account_id, token.as_ref(), hsm_lock.deref_mut(), now)
|
|
.await
|
|
{
|
|
// Ignore this one.
|
|
Ok(UserTokenState::NotFound) => {}
|
|
result => break 'search result,
|
|
}
|
|
}
|
|
break 'search Ok(UserTokenState::NotFound);
|
|
}
|
|
};
|
|
|
|
match user_get_result {
|
|
Ok(UserTokenState::Update(mut n_tok)) => {
|
|
// We have the token!
|
|
self.set_cache_usertoken(&mut n_tok, hsm_lock.deref_mut())
|
|
.await?;
|
|
Ok(Some(n_tok))
|
|
}
|
|
Ok(UserTokenState::NotFound) => {
|
|
// It previously existed, so now purge it.
|
|
if let Some(tok) = token {
|
|
self.delete_cache_usertoken(tok.uuid).await?;
|
|
};
|
|
// Cache the NX here.
|
|
self.set_nxcache(account_id).await;
|
|
Ok(None)
|
|
}
|
|
Ok(UserTokenState::UseCached) => Ok(token),
|
|
Err(err) => {
|
|
// Something went wrong, we don't know what, but lets return the token
|
|
// anyway.
|
|
error!(?err);
|
|
Ok(token)
|
|
}
|
|
}
|
|
}
|
|
|
|
async fn refresh_grouptoken(
|
|
&self,
|
|
grp_id: &Id,
|
|
token: Option<GroupToken>,
|
|
) -> Result<Option<GroupToken>, ()> {
|
|
// TODO: Move this to the caller.
|
|
let now = SystemTime::now();
|
|
|
|
let mut hsm_lock = self.hsm.lock().await;
|
|
|
|
let group_get_result = if let Some(tok) = token.as_ref() {
|
|
// Re-use the provider that the token is from.
|
|
match self.client_ids.get(&tok.provider) {
|
|
Some(client) => {
|
|
client
|
|
.unix_group_get(grp_id, hsm_lock.deref_mut(), now)
|
|
.await
|
|
}
|
|
None => {
|
|
error!(provider = ?tok.provider, "Token was resolved by a provider that no longer appears to be present.");
|
|
// We don't want to use a token from a former provider, we want it refreshed,
|
|
// so lets indicate that we didn't find the token. If we return useCcahed like
|
|
// we did previously, we'd never clear and reset this token since we'd never
|
|
// locate it's provider.
|
|
Ok(GroupTokenState::NotFound)
|
|
}
|
|
}
|
|
} else {
|
|
// We've never seen it before, so iterate over the providers in priority order.
|
|
'search: {
|
|
for client in self.clients.iter() {
|
|
match client
|
|
.unix_group_get(grp_id, hsm_lock.deref_mut(), now)
|
|
.await
|
|
{
|
|
// Ignore this one.
|
|
Ok(GroupTokenState::NotFound) => {}
|
|
result => break 'search result,
|
|
}
|
|
}
|
|
break 'search Ok(GroupTokenState::NotFound);
|
|
}
|
|
};
|
|
|
|
drop(hsm_lock);
|
|
|
|
match group_get_result {
|
|
Ok(GroupTokenState::Update(n_tok)) => {
|
|
self.set_cache_grouptoken(&n_tok).await?;
|
|
Ok(Some(n_tok))
|
|
}
|
|
Ok(GroupTokenState::NotFound) => {
|
|
if let Some(tok) = token {
|
|
self.delete_cache_grouptoken(tok.uuid).await?;
|
|
};
|
|
// Cache the NX here.
|
|
self.set_nxcache(grp_id).await;
|
|
Ok(None)
|
|
}
|
|
Ok(GroupTokenState::UseCached) => Ok(token),
|
|
Err(err) => {
|
|
// Some other transient error, continue with the token.
|
|
error!(?err);
|
|
Ok(token)
|
|
}
|
|
}
|
|
}
|
|
|
|
#[instrument(level = "debug", skip(self))]
|
|
async fn get_usertoken(&self, account_id: &Id) -> Result<Option<UserToken>, ()> {
|
|
// get the item from the cache
|
|
let (expired, item) = self.get_cached_usertoken(account_id).await.map_err(|e| {
|
|
debug!("get_usertoken error -> {:?}", e);
|
|
})?;
|
|
|
|
// If the token isn't found, get_cached will set expired = true.
|
|
if expired {
|
|
self.refresh_usertoken(account_id, item).await
|
|
} else {
|
|
// Still valid, return the cached entry.
|
|
Ok(item)
|
|
}
|
|
.map(|t| {
|
|
debug!("token -> {:?}", t);
|
|
t
|
|
})
|
|
}
|
|
|
|
#[instrument(level = "debug", skip(self))]
|
|
async fn get_grouptoken(&self, grp_id: Id) -> Result<Option<GroupToken>, ()> {
|
|
let (expired, item) = self.get_cached_grouptoken(&grp_id).await.map_err(|e| {
|
|
debug!("get_grouptoken error -> {:?}", e);
|
|
})?;
|
|
|
|
if expired {
|
|
self.refresh_grouptoken(&grp_id, item).await
|
|
} else {
|
|
// Still valid, return the cached entry.
|
|
Ok(item)
|
|
}
|
|
.map(|t| {
|
|
debug!("token -> {:?}", t);
|
|
t
|
|
})
|
|
}
|
|
|
|
async fn get_groupmembers(&self, g_uuid: Uuid) -> Vec<String> {
|
|
let mut dbtxn = self.db.write().await;
|
|
|
|
dbtxn
|
|
.get_group_members(g_uuid)
|
|
.unwrap_or_else(|_| Vec::new())
|
|
.into_iter()
|
|
.map(|ut| self.token_uidattr(&ut))
|
|
.collect()
|
|
}
|
|
|
|
// Get ssh keys for an account id
|
|
#[instrument(level = "debug", skip(self))]
|
|
pub async fn get_sshkeys(&self, account_id: &str) -> Result<Vec<String>, ()> {
|
|
let token = self
|
|
.get_usertoken(&Id::Name(account_id.to_string()))
|
|
.await?;
|
|
Ok(token
|
|
.map(|t| {
|
|
// Only return keys if the account is valid
|
|
if t.valid {
|
|
t.sshkeys
|
|
} else {
|
|
Vec::with_capacity(0)
|
|
}
|
|
})
|
|
.unwrap_or_else(|| Vec::with_capacity(0)))
|
|
}
|
|
|
|
fn token_homedirectory_alias(&self, token: &UserToken) -> Option<String> {
|
|
let is_primary_origin = token.provider == self.primary_origin;
|
|
self.home_alias.map(|t| match t {
|
|
// If we have an alias. use it.
|
|
HomeAttr::Name if is_primary_origin => token.name.as_str().to_string(),
|
|
HomeAttr::Uuid => token.uuid.hyphenated().to_string(),
|
|
HomeAttr::Spn | HomeAttr::Name => token.spn.as_str().to_string(),
|
|
})
|
|
}
|
|
|
|
fn token_homedirectory_attr(&self, token: &UserToken) -> String {
|
|
let is_primary_origin = token.provider == self.primary_origin;
|
|
match self.home_attr {
|
|
HomeAttr::Name if is_primary_origin => token.name.as_str().to_string(),
|
|
HomeAttr::Uuid => token.uuid.hyphenated().to_string(),
|
|
HomeAttr::Spn | HomeAttr::Name => token.spn.as_str().to_string(),
|
|
}
|
|
}
|
|
|
|
fn token_homedirectory(&self, token: &UserToken) -> String {
|
|
self.token_homedirectory_alias(token)
|
|
.unwrap_or_else(|| self.token_homedirectory_attr(token))
|
|
}
|
|
|
|
fn token_abs_homedirectory(&self, token: &UserToken) -> String {
|
|
self.home_prefix
|
|
.join(self.token_homedirectory(token))
|
|
.to_string_lossy()
|
|
.to_string()
|
|
}
|
|
|
|
fn token_uidattr(&self, token: &UserToken) -> String {
|
|
let is_primary_origin = token.provider == self.primary_origin;
|
|
match self.uid_attr_map {
|
|
UidAttr::Name if is_primary_origin => token.name.as_str(),
|
|
UidAttr::Spn | UidAttr::Name => token.spn.as_str(),
|
|
}
|
|
.to_string()
|
|
}
|
|
|
|
#[instrument(level = "debug", skip_all)]
|
|
pub async fn get_nssaccounts(&self) -> Result<Vec<NssUser>, ()> {
|
|
// We don't need to filter the cached tokens as the cache shouldn't
|
|
// have anything that collides with system.
|
|
let system_nss_users = self.system_provider.get_nssaccounts().await;
|
|
|
|
let cached = self.get_cached_usertokens().await?;
|
|
|
|
Ok(system_nss_users
|
|
.into_iter()
|
|
.chain(cached.into_iter().map(|tok| NssUser {
|
|
homedir: self.token_abs_homedirectory(&tok),
|
|
name: self.token_uidattr(&tok),
|
|
uid: tok.gidnumber,
|
|
gid: tok.gidnumber,
|
|
gecos: tok.displayname,
|
|
shell: tok.shell.unwrap_or_else(|| self.default_shell.clone()),
|
|
}))
|
|
.collect())
|
|
}
|
|
|
|
#[instrument(level = "debug", skip_all)]
|
|
async fn get_nssaccount(&self, account_id: Id) -> Result<Option<NssUser>, ()> {
|
|
if let Some(nss_user) = self.system_provider.get_nssaccount(&account_id).await {
|
|
debug!("system provider satisfied request");
|
|
return Ok(Some(nss_user));
|
|
}
|
|
|
|
let token = self.get_usertoken(&account_id).await?;
|
|
Ok(token.map(|tok| NssUser {
|
|
homedir: self.token_abs_homedirectory(&tok),
|
|
name: self.token_uidattr(&tok),
|
|
uid: tok.gidnumber,
|
|
gid: tok.gidnumber,
|
|
gecos: tok.displayname,
|
|
shell: tok.shell.unwrap_or_else(|| self.default_shell.clone()),
|
|
}))
|
|
}
|
|
|
|
#[instrument(level = "debug", skip(self))]
|
|
pub async fn get_nssaccount_name(&self, account_id: &str) -> Result<Option<NssUser>, ()> {
|
|
self.get_nssaccount(Id::Name(account_id.to_string())).await
|
|
}
|
|
|
|
#[instrument(level = "debug", skip(self))]
|
|
pub async fn get_nssaccount_gid(&self, gid: u32) -> Result<Option<NssUser>, ()> {
|
|
self.get_nssaccount(Id::Gid(gid)).await
|
|
}
|
|
|
|
fn token_gidattr(&self, token: &GroupToken) -> String {
|
|
match self.gid_attr_map {
|
|
UidAttr::Spn => token.spn.as_str(),
|
|
UidAttr::Name => token.name.as_str(),
|
|
}
|
|
.to_string()
|
|
}
|
|
|
|
#[instrument(level = "debug", skip_all)]
|
|
pub async fn get_nssgroups(&self) -> Result<Vec<NssGroup>, ()> {
|
|
let mut r = self.system_provider.get_nssgroups().await;
|
|
|
|
// Extend all the local groups if maps exist.
|
|
for nss_group in r.iter_mut() {
|
|
for client in self.clients.iter() {
|
|
if let Some(extend_group_id) = client.has_map_group(&nss_group.name) {
|
|
let (_, token) = self.get_cached_grouptoken(extend_group_id).await?;
|
|
if let Some(token) = token {
|
|
let members = self.get_groupmembers(token.uuid).await;
|
|
nss_group.members.extend(members);
|
|
debug!(
|
|
"extended group {} with members from {}",
|
|
nss_group.name, token.name
|
|
);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
let l = self.get_cached_grouptokens().await?;
|
|
r.reserve(l.len());
|
|
for tok in l.into_iter() {
|
|
let members = self.get_groupmembers(tok.uuid).await;
|
|
r.push(NssGroup {
|
|
name: self.token_gidattr(&tok),
|
|
gid: tok.gidnumber,
|
|
members,
|
|
})
|
|
}
|
|
Ok(r)
|
|
}
|
|
|
|
async fn get_nssgroup(&self, grp_id: Id) -> Result<Option<NssGroup>, ()> {
|
|
if let Some(mut nss_group) = self.system_provider.get_nssgroup(&grp_id).await {
|
|
debug!("system provider satisfied request");
|
|
|
|
for client in self.clients.iter() {
|
|
if let Some(extend_group_id) = client.has_map_group(&nss_group.name) {
|
|
let token = self.get_grouptoken(extend_group_id.clone()).await?;
|
|
if let Some(token) = token {
|
|
let members = self.get_groupmembers(token.uuid).await;
|
|
nss_group.members.extend(members);
|
|
debug!(
|
|
"extended group {} with members from {}",
|
|
nss_group.name, token.name
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
nss_group.members.sort_unstable();
|
|
nss_group.members.dedup();
|
|
|
|
return Ok(Some(nss_group));
|
|
}
|
|
|
|
let token = self.get_grouptoken(grp_id).await?;
|
|
// Get members set.
|
|
match token {
|
|
Some(tok) => {
|
|
let members = self.get_groupmembers(tok.uuid).await;
|
|
Ok(Some(NssGroup {
|
|
name: self.token_gidattr(&tok),
|
|
gid: tok.gidnumber,
|
|
members,
|
|
}))
|
|
}
|
|
None => Ok(None),
|
|
}
|
|
}
|
|
|
|
#[instrument(level = "debug", skip(self))]
|
|
pub async fn get_nssgroup_name(&self, grp_id: &str) -> Result<Option<NssGroup>, ()> {
|
|
self.get_nssgroup(Id::Name(grp_id.to_string())).await
|
|
}
|
|
|
|
#[instrument(level = "debug", skip(self))]
|
|
pub async fn get_nssgroup_gid(&self, gid: u32) -> Result<Option<NssGroup>, ()> {
|
|
self.get_nssgroup(Id::Gid(gid)).await
|
|
}
|
|
|
|
#[instrument(level = "debug", skip(self))]
|
|
pub async fn pam_account_allowed(&self, account_id: &str) -> Result<Option<bool>, ()> {
|
|
let id = Id::Name(account_id.to_string());
|
|
|
|
if let Some(answer) = self.system_provider.authorise(&id).await {
|
|
return Ok(Some(answer));
|
|
};
|
|
|
|
// Not a system account, handle with the provider.
|
|
let token = self.get_usertoken(&id).await?;
|
|
|
|
// If there is no token, return Ok(None) to trigger unknown-user path in pam.
|
|
match token {
|
|
Some(token) => {
|
|
let client = self.client_ids.get(&token.provider)
|
|
.cloned()
|
|
.ok_or_else(|| {
|
|
error!(provider = ?token.provider, "Token was resolved by a provider that no longer appears to be present.");
|
|
})?;
|
|
|
|
client.unix_user_authorise(&token).await.map_err(|err| {
|
|
error!(?err, "unable to authorise account");
|
|
})
|
|
}
|
|
None => Ok(None),
|
|
}
|
|
}
|
|
|
|
#[instrument(level = "debug", skip(self, shutdown_rx))]
|
|
pub async fn pam_account_authenticate_init(
|
|
&self,
|
|
account_id: &str,
|
|
pam_info: &PamServiceInfo,
|
|
current_time: OffsetDateTime,
|
|
shutdown_rx: broadcast::Receiver<()>,
|
|
) -> Result<(AuthSession, PamAuthResponse), ()> {
|
|
// Setup an auth session. If possible bring the resolver online.
|
|
// Further steps won't attempt to bring the cache online to prevent
|
|
// weird interactions - they should assume online/offline only for
|
|
// the duration of their operation. A failure of connectivity during
|
|
// an online operation will take the cache offline however.
|
|
let now = SystemTime::now();
|
|
|
|
let id = Id::Name(account_id.to_string());
|
|
|
|
match self.system_provider.auth_init(&id, current_time).await {
|
|
// The system provider will not take part in this authentication.
|
|
SystemProviderAuthInit::Ignore => {
|
|
debug!(?account_id, "account unknown to system provider, continue.");
|
|
}
|
|
// The provider knows the account, and is unable to proceed,
|
|
// We return unknown here so that pam_kanidm can be skipped and fall back
|
|
// to pam_unix.so.
|
|
SystemProviderAuthInit::ShadowMissing => {
|
|
warn!(
|
|
?account_id,
|
|
"Resolver unable to proceed, /etc/shadow was not accessible."
|
|
);
|
|
return Ok((AuthSession::Denied, PamAuthResponse::Unknown));
|
|
}
|
|
// There are no credentials for this account
|
|
SystemProviderAuthInit::CredentialsUnavailable => {
|
|
warn!(
|
|
?account_id,
|
|
"Denying auth request for system user with no valid credentials"
|
|
);
|
|
return Ok((AuthSession::Denied, PamAuthResponse::Denied));
|
|
}
|
|
// The account has expired
|
|
SystemProviderAuthInit::Expired => {
|
|
warn!(
|
|
?account_id,
|
|
"Denying auth request for system user with expired credentials"
|
|
);
|
|
return Ok((AuthSession::Denied, PamAuthResponse::Denied));
|
|
}
|
|
// The provider knows the account and wants to proceed,
|
|
SystemProviderAuthInit::Begin {
|
|
next_request,
|
|
cred_handler,
|
|
shadow,
|
|
} => {
|
|
let auth_session = AuthSession::System {
|
|
account_id: account_id.to_string(),
|
|
id,
|
|
shadow,
|
|
cred_handler,
|
|
};
|
|
|
|
return Ok((auth_session, next_request.into()));
|
|
}
|
|
}
|
|
|
|
let token = self.get_usertoken(&id).await?;
|
|
|
|
// Get the provider associated to this token.
|
|
|
|
let mut hsm_lock = self.hsm.lock().await;
|
|
|
|
// We don't care if we are expired - we will always attempt to go
|
|
// online and perform this operation online if possible.
|
|
|
|
if let Some(token) = token {
|
|
// We have a token, we know what provider is needed
|
|
let client = self.client_ids.get(&token.provider)
|
|
.cloned()
|
|
.ok_or_else(|| {
|
|
error!(provider = ?token.provider, "Token was resolved by a provider that no longer appears to be present.");
|
|
})?;
|
|
|
|
let online_at_init = client.attempt_online(hsm_lock.deref_mut(), now).await;
|
|
// if we are online, we try and start an online auth.
|
|
debug!(?online_at_init);
|
|
|
|
if online_at_init {
|
|
let init_result = client
|
|
.unix_user_online_auth_init(
|
|
account_id,
|
|
&token,
|
|
hsm_lock.deref_mut(),
|
|
&shutdown_rx,
|
|
)
|
|
.await;
|
|
|
|
match init_result {
|
|
Ok((next_req, cred_handler)) => {
|
|
let auth_session = AuthSession::Online {
|
|
client,
|
|
account_id: account_id.to_string(),
|
|
id,
|
|
cred_handler,
|
|
shutdown_rx,
|
|
};
|
|
Ok((auth_session, next_req.into()))
|
|
}
|
|
Err(err) => {
|
|
error!(?err, "Unable to start authentication");
|
|
Err(())
|
|
}
|
|
}
|
|
} else {
|
|
// Can the auth proceed offline?
|
|
let init_result = client.unix_user_offline_auth_init(&token).await;
|
|
|
|
match init_result {
|
|
Ok((next_req, cred_handler)) => {
|
|
let auth_session = AuthSession::Offline {
|
|
account_id: account_id.to_string(),
|
|
id,
|
|
client,
|
|
session_token: Box::new(token),
|
|
cred_handler,
|
|
};
|
|
Ok((auth_session, next_req.into()))
|
|
}
|
|
Err(err) => {
|
|
error!(?err, "Unable to start authentication");
|
|
Err(())
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
// We don't know anything about this user. Can we try to auth them?
|
|
|
|
// TODO: If any provider is offline should we fail the auth? I can imagine a possible
|
|
// issue where if we had provides A, B, C stacked, and A was offline, then B could
|
|
// service an auth that A *should* have serviced.
|
|
|
|
for client in self.clients.iter() {
|
|
let online_at_init = client.attempt_online(hsm_lock.deref_mut(), now).await;
|
|
debug!(?online_at_init);
|
|
|
|
if !online_at_init {
|
|
warn!(?account_id, "Unable to proceed with authentication, all providers must be online for unknown user authentication.");
|
|
return Ok((AuthSession::Denied, PamAuthResponse::Unknown));
|
|
}
|
|
}
|
|
|
|
for client in self.clients.iter() {
|
|
let init_result = client
|
|
.unix_unknown_user_online_auth_init(
|
|
account_id,
|
|
hsm_lock.deref_mut(),
|
|
&shutdown_rx,
|
|
)
|
|
.await;
|
|
|
|
match init_result {
|
|
Ok(Some((next_req, cred_handler))) => {
|
|
let auth_session = AuthSession::Online {
|
|
client: client.clone(),
|
|
account_id: account_id.to_string(),
|
|
id,
|
|
cred_handler,
|
|
shutdown_rx,
|
|
};
|
|
return Ok((auth_session, next_req.into()));
|
|
}
|
|
Ok(None) => {
|
|
// Not for us, check the next provider.
|
|
}
|
|
Err(err) => {
|
|
error!(?err, "Unable to start authentication");
|
|
return Err(());
|
|
}
|
|
}
|
|
}
|
|
|
|
// No module signaled that they want it, bail.
|
|
warn!("No provider is willing to service authentication of unknown account.");
|
|
Ok((AuthSession::Denied, PamAuthResponse::Unknown))
|
|
}
|
|
}
|
|
|
|
#[instrument(level = "debug", skip_all)]
|
|
pub async fn pam_account_authenticate_step(
|
|
&self,
|
|
auth_session: &mut AuthSession,
|
|
pam_next_req: PamAuthRequest,
|
|
) -> Result<PamAuthResponse, ()> {
|
|
let mut hsm_lock = self.hsm.lock().await;
|
|
|
|
let maybe_err = match &mut *auth_session {
|
|
&mut AuthSession::Online {
|
|
ref client,
|
|
ref account_id,
|
|
ref id,
|
|
ref mut cred_handler,
|
|
ref shutdown_rx,
|
|
} => {
|
|
// This is not used in the authentication, but is so that any new
|
|
// extra keys or data on the token are updated correctly if the authentication
|
|
// requests an update. Since we hold the hsm_lock, no other task can
|
|
// update this token between now and completion of the fn.
|
|
let current_token = self
|
|
.get_cached_usertoken(id)
|
|
.await
|
|
.map(|(_expired, option_token)| option_token)
|
|
.map_err(|err| {
|
|
debug!(?err, "get_usertoken error");
|
|
})?;
|
|
|
|
let result = client
|
|
.unix_user_online_auth_step(
|
|
account_id,
|
|
current_token.as_ref(),
|
|
cred_handler,
|
|
pam_next_req,
|
|
hsm_lock.deref_mut(),
|
|
shutdown_rx,
|
|
)
|
|
.await;
|
|
|
|
match result {
|
|
Ok(AuthResult::SuccessUpdate { .. } | AuthResult::Success) => {
|
|
info!(?account_id, "Authentication Success");
|
|
}
|
|
Ok(AuthResult::Denied) => {
|
|
info!(?account_id, "Authentication Denied");
|
|
}
|
|
Ok(AuthResult::Next(_)) => {
|
|
info!(?account_id, "Authentication Continue");
|
|
}
|
|
_ => {}
|
|
};
|
|
|
|
result
|
|
}
|
|
&mut AuthSession::Offline {
|
|
ref account_id,
|
|
ref id,
|
|
ref client,
|
|
ref session_token,
|
|
ref mut cred_handler,
|
|
} => {
|
|
// This is not used in the authentication, but is so that any new
|
|
// extra keys or data on the token are updated correctly if the authentication
|
|
// requests an update. Since we hold the hsm_lock, no other task can
|
|
// update this token between now and completion of the fn.
|
|
let current_token = self
|
|
.get_cached_usertoken(id)
|
|
.await
|
|
.map(|(_expired, option_token)| option_token)
|
|
.map_err(|err| {
|
|
debug!(?err, "get_usertoken error");
|
|
})?;
|
|
|
|
// We are offline, continue. Remember, authsession should have
|
|
// *everything you need* to proceed here!
|
|
let result = client
|
|
.unix_user_offline_auth_step(
|
|
current_token.as_ref(),
|
|
session_token,
|
|
cred_handler,
|
|
pam_next_req,
|
|
hsm_lock.deref_mut(),
|
|
)
|
|
.await;
|
|
|
|
match result {
|
|
Ok(AuthResult::SuccessUpdate { .. } | AuthResult::Success) => {
|
|
info!(?account_id, "Authentication Success");
|
|
}
|
|
Ok(AuthResult::Denied) => {
|
|
info!(?account_id, "Authentication Denied");
|
|
}
|
|
Ok(AuthResult::Next(_)) => {
|
|
info!(?account_id, "Authentication Continue");
|
|
}
|
|
_ => {}
|
|
};
|
|
|
|
result
|
|
}
|
|
&mut AuthSession::System {
|
|
ref account_id,
|
|
id: _,
|
|
ref mut cred_handler,
|
|
ref shadow,
|
|
} => {
|
|
// I had a lot of thoughts here, but I think system auth is
|
|
// not the same as provider, so I think we special case here and have a separate
|
|
// return type.
|
|
let system_auth_result = shadow.auth_step(cred_handler, pam_next_req);
|
|
|
|
let next = match system_auth_result {
|
|
SystemAuthResult::Denied => {
|
|
info!(?account_id, "Authentication Denied");
|
|
|
|
*auth_session = AuthSession::Denied;
|
|
|
|
Ok(PamAuthResponse::Denied)
|
|
}
|
|
SystemAuthResult::Success => {
|
|
info!(?account_id, "Authentication Success");
|
|
|
|
*auth_session = AuthSession::Success;
|
|
|
|
Ok(PamAuthResponse::Success)
|
|
}
|
|
SystemAuthResult::Next(req) => Ok(req.into()),
|
|
};
|
|
|
|
// We shortcut here
|
|
return next;
|
|
}
|
|
&mut AuthSession::Success | &mut AuthSession::Denied => Err(IdpError::BadRequest),
|
|
};
|
|
|
|
match maybe_err {
|
|
// What did the provider direct us to do next?
|
|
Ok(AuthResult::Success) => {
|
|
*auth_session = AuthSession::Success;
|
|
Ok(PamAuthResponse::Success)
|
|
}
|
|
Ok(AuthResult::SuccessUpdate { mut new_token }) => {
|
|
self.set_cache_usertoken(&mut new_token, hsm_lock.deref_mut())
|
|
.await?;
|
|
*auth_session = AuthSession::Success;
|
|
|
|
Ok(PamAuthResponse::Success)
|
|
}
|
|
Ok(AuthResult::Denied) => {
|
|
*auth_session = AuthSession::Denied;
|
|
|
|
Ok(PamAuthResponse::Denied)
|
|
}
|
|
Ok(AuthResult::Next(req)) => Ok(req.into()),
|
|
Err(IdpError::NotFound) => {
|
|
*auth_session = AuthSession::Denied;
|
|
|
|
Ok(PamAuthResponse::Unknown)
|
|
}
|
|
Err(err) => {
|
|
*auth_session = AuthSession::Denied;
|
|
|
|
error!(?err, "Unable to proceed, failing the session");
|
|
Err(())
|
|
}
|
|
}
|
|
}
|
|
|
|
// Can this be cfg debug/test?
|
|
#[instrument(level = "debug", skip(self, password))]
|
|
pub async fn pam_account_authenticate(
|
|
&self,
|
|
account_id: &str,
|
|
current_time: OffsetDateTime,
|
|
password: &str,
|
|
) -> Result<Option<bool>, ()> {
|
|
let (_shutdown_tx, shutdown_rx) = broadcast::channel(1);
|
|
|
|
let pam_info = PamServiceInfo {
|
|
service: "kanidm-unix-test".to_string(),
|
|
tty: Some("/dev/null".to_string()),
|
|
rhost: None,
|
|
};
|
|
|
|
let mut auth_session = match self
|
|
.pam_account_authenticate_init(account_id, &pam_info, current_time, shutdown_rx)
|
|
.await?
|
|
{
|
|
(auth_session, PamAuthResponse::Password) => {
|
|
// Can continue!
|
|
auth_session
|
|
}
|
|
(auth_session, PamAuthResponse::DeviceAuthorizationGrant { .. }) => {
|
|
// Can continue!
|
|
auth_session
|
|
}
|
|
(auth_session, PamAuthResponse::MFACode { .. }) => {
|
|
// Can continue!
|
|
auth_session
|
|
}
|
|
(auth_session, PamAuthResponse::MFAPoll { .. }) => {
|
|
// Can continue!
|
|
auth_session
|
|
}
|
|
(auth_session, PamAuthResponse::MFAPollWait) => {
|
|
// Can continue!
|
|
auth_session
|
|
}
|
|
(auth_session, PamAuthResponse::SetupPin { .. }) => {
|
|
// Can continue!
|
|
auth_session
|
|
}
|
|
(auth_session, PamAuthResponse::Pin) => {
|
|
// Can continue!
|
|
auth_session
|
|
}
|
|
(_, PamAuthResponse::Unknown) => return Ok(None),
|
|
(_, PamAuthResponse::Denied) => return Ok(Some(false)),
|
|
(_, PamAuthResponse::Success) => {
|
|
// Should never get here "off the rip".
|
|
debug_assert!(false);
|
|
return Ok(Some(true));
|
|
}
|
|
};
|
|
|
|
// Now we can make the next step.
|
|
let pam_next_req = PamAuthRequest::Password {
|
|
cred: password.to_string(),
|
|
};
|
|
match self
|
|
.pam_account_authenticate_step(&mut auth_session, pam_next_req)
|
|
.await?
|
|
{
|
|
PamAuthResponse::Success => Ok(Some(true)),
|
|
PamAuthResponse::Denied => Ok(Some(false)),
|
|
_ => {
|
|
// Should not be able to get here, if the user was unknown they should
|
|
// be out. If it wants more mechanisms, we can't proceed here.
|
|
// debug_assert!(false);
|
|
Ok(None)
|
|
}
|
|
}
|
|
}
|
|
|
|
#[instrument(level = "debug", skip(self))]
|
|
pub async fn pam_account_beginsession(
|
|
&self,
|
|
account_id: &str,
|
|
) -> Result<Option<HomeDirectoryInfo>, ()> {
|
|
let id = Id::Name(account_id.to_string());
|
|
|
|
match self.system_provider.begin_session(&id).await {
|
|
SystemProviderSession::Start => {
|
|
return Ok(None);
|
|
}
|
|
/*
|
|
SystemProviderSession::StartCreateHome(
|
|
info
|
|
) => {
|
|
return Ok(Some(info));
|
|
}
|
|
*/
|
|
SystemProviderSession::Ignore => {}
|
|
};
|
|
|
|
// Not a system account, check based on the token and resolve.
|
|
let token = self.get_usertoken(&id).await?;
|
|
Ok(token.as_ref().map(|tok| HomeDirectoryInfo {
|
|
uid: tok.gidnumber,
|
|
gid: tok.gidnumber,
|
|
name: self.token_homedirectory_attr(tok),
|
|
aliases: self
|
|
.token_homedirectory_alias(tok)
|
|
.map(|s| vec![s])
|
|
.unwrap_or_default(),
|
|
}))
|
|
}
|
|
|
|
pub async fn provider_status(&self) -> Vec<ProviderStatus> {
|
|
let now = SystemTime::now();
|
|
let mut hsm_lock = self.hsm.lock().await;
|
|
|
|
let mut results = Vec::with_capacity(self.clients.len() + 1);
|
|
|
|
results.push(ProviderStatus {
|
|
name: "system".to_string(),
|
|
online: true,
|
|
});
|
|
|
|
for client in self.clients.iter() {
|
|
let online = client.attempt_online(hsm_lock.deref_mut(), now).await;
|
|
|
|
let name = client.origin().to_string();
|
|
|
|
results.push(ProviderStatus { name, online })
|
|
}
|
|
|
|
results
|
|
}
|
|
|
|
#[instrument(level = "debug", skip_all)]
|
|
pub async fn test_connection(&self) -> bool {
|
|
let now = SystemTime::now();
|
|
let mut hsm_lock = self.hsm.lock().await;
|
|
|
|
for client in self.clients.iter() {
|
|
let status = client.attempt_online(hsm_lock.deref_mut(), now).await;
|
|
|
|
if !status {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// All online
|
|
true
|
|
}
|
|
}
|