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157 lines
4.4 KiB
Rust
157 lines
4.4 KiB
Rust
use crate::common::HeapSecretKey;
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use std::collections::HashMap;
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use std::sync::Arc;
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use tokio::sync::RwLock;
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/// Represents the result of a request to the database.
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#[derive(Copy, Clone, Debug, PartialEq, Eq)]
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pub enum KeychainResult<T> {
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/// Id was not found in the database.
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InvalidId,
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/// Password match for an id failed.
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InvalidPassword,
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/// Successful match of id and password, removing from keychain and returning data `T`.
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Ok(T),
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}
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impl<T> KeychainResult<T> {
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pub fn is_invalid_id(&self) -> bool {
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matches!(self, Self::InvalidId)
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}
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pub fn is_invalid_password(&self) -> bool {
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matches!(self, Self::InvalidPassword)
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}
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pub fn is_invalid(&self) -> bool {
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matches!(self, Self::InvalidId | Self::InvalidPassword)
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}
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pub fn is_ok(&self) -> bool {
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matches!(self, Self::Ok(_))
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}
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pub fn into_ok(self) -> Option<T> {
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match self {
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Self::Ok(x) => Some(x),
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_ => None,
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}
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}
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}
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impl<T> From<KeychainResult<T>> for Option<T> {
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fn from(result: KeychainResult<T>) -> Self {
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result.into_ok()
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}
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}
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/// Manages keys with associated ids. Cloning will result in a copy pointing to the same underlying
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/// storage, which enables support of managing the keys across multiple threads.
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#[derive(Debug)]
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pub struct Keychain<T = ()> {
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map: Arc<RwLock<HashMap<String, (HeapSecretKey, T)>>>,
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}
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impl<T> Clone for Keychain<T> {
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fn clone(&self) -> Self {
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Self {
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map: Arc::clone(&self.map),
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}
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}
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}
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impl<T> Keychain<T> {
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/// Creates a new keychain without any keys.
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pub fn new() -> Self {
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Self {
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map: Arc::new(RwLock::new(HashMap::new())),
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}
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}
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/// Stores a new `key` and `data` by a given `id`, returning the old data associated with the
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/// id if there was one already registered.
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pub async fn insert(&self, id: impl Into<String>, key: HeapSecretKey, data: T) -> Option<T> {
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self.map
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.write()
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.await
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.insert(id.into(), (key, data))
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.map(|(_, data)| data)
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}
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/// Checks if there is an `id` stored within the keychain.
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pub async fn has_id(&self, id: impl AsRef<str>) -> bool {
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self.map.read().await.contains_key(id.as_ref())
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}
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/// Checks if there is a key with the given `id` that matches the provided `key`.
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pub async fn has_key(&self, id: impl AsRef<str>, key: impl PartialEq<HeapSecretKey>) -> bool {
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self.map
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.read()
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.await
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.get(id.as_ref())
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.map(|(k, _)| key.eq(k))
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.unwrap_or(false)
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}
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/// Removes a key and its data by a given `id`, returning the data if the `id` exists.
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pub async fn remove(&self, id: impl AsRef<str>) -> Option<T> {
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self.map
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.write()
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.await
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.remove(id.as_ref())
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.map(|(_, data)| data)
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}
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/// Checks if there is a key with the given `id` that matches the provided `key`, returning the
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/// data if the `id` exists and the `key` matches.
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pub async fn remove_if_has_key(
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&self,
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id: impl AsRef<str>,
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key: impl PartialEq<HeapSecretKey>,
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) -> KeychainResult<T> {
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let id = id.as_ref();
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let mut lock = self.map.write().await;
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match lock.get(id) {
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Some((k, _)) if key.eq(k) => KeychainResult::Ok(lock.remove(id).unwrap().1),
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Some(_) => KeychainResult::InvalidPassword,
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None => KeychainResult::InvalidId,
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}
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}
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}
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impl Keychain<()> {
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/// Stores a new `key by a given `id`.
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pub async fn put(&self, id: impl Into<String>, key: HeapSecretKey) {
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self.insert(id, key, ()).await;
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}
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}
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impl Default for Keychain {
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fn default() -> Self {
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Self::new()
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}
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}
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impl<T> From<HashMap<String, (HeapSecretKey, T)>> for Keychain<T> {
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/// Creates a new keychain populated with the provided `map`.
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fn from(map: HashMap<String, (HeapSecretKey, T)>) -> Self {
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Self {
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map: Arc::new(RwLock::new(map)),
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}
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}
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}
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impl From<HashMap<String, HeapSecretKey>> for Keychain<()> {
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/// Creates a new keychain populated with the provided `map`.
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fn from(map: HashMap<String, HeapSecretKey>) -> Self {
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Self::from(
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map.into_iter()
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.map(|(id, key)| (id, (key, ())))
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.collect::<HashMap<String, (HeapSecretKey, ())>>(),
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)
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}
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}
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