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//! State management utilities for hidden services.
use std::path::Path;
use fs_mistrust::Mistrust;
use tor_error::into_internal;
use tor_hscrypto::pk::{HsId, HsIdKey};
use tor_keymgr::{ArtiNativeKeystore, KeyMgr, KeyMgrBuilder};
use crate::{HsIdPublicKeySpecifier, HsNickname};
/// A helper for managing the persistent state of hidden services.
//
// TODO HSS decide what API we want here and implement it
// See https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/1837#note_2977513
pub struct StateMgr {
/// The key manager
keymgr: KeyMgr,
}
impl StateMgr {
/// Create a new `StateMgr`.
pub fn new(keystore_dir: impl AsRef<Path>, permissions: &Mistrust) -> tor_keymgr::Result<Self> {
let arti_store = ArtiNativeKeystore::from_path_and_mistrust(&keystore_dir, permissions)?;
// TODO HSS: make the default store configurable
let default_store = arti_store;
let keymgr = KeyMgrBuilder::default()
.default_store(Box::new(default_store))
.build()
.map_err(|e| into_internal!("failed to build KeyMgr")(e))?;
Ok(Self { keymgr })
}
/// Return the onion address of the service with the specified nickname.
///
/// Returns `None` if no such service is configured,
/// or if the HsId of the service could not be found in the configured keystores.
pub fn onion_name(&self, nickname: &HsNickname) -> Option<HsId> {
let hsid_spec = HsIdPublicKeySpecifier::new(nickname.clone());
self.keymgr
.get::<HsIdKey>(&hsid_spec)
.ok()?
.map(|hsid| hsid.id())
}
}
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