tmp22/src/cache/mod.rs

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/*
* mCaptcha - A proof of work based DoS protection system
* Copyright © 2021 Aravinth Manivannan <realravinth@batsense.net>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
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//! Cache is used to save proofof work details and nonces to prevent replay attacks
//! and rainbow/dictionary attacks
pub use hashcache::HashCache;
use messages::*;
pub mod hashcache;
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/// Describes actor handler trait impls that are required by a cache implementation
pub trait Save:
actix::Actor + actix::Handler<Retrive> + actix::Handler<Cache> + actix::Handler<DeleteString>
{
}
pub mod messages {
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//! Messages that can be sent to cache data structures implementing [Save][super::Save]
use actix::dev::*;
use derive_builder::Builder;
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use serde::{Deserialize, Serialize};
use crate::errors::*;
use crate::mcaptcha::VisitorResult;
use crate::pow::PoWConfig;
/// Message to cache PoW difficulty factor and string
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#[derive(Message, Serialize, Deserialize, Builder)]
#[rtype(result = "CaptchaResult<()>")]
pub struct Cache {
pub string: String,
pub difficulty_factor: u32,
pub duration: u64,
}
impl Cache {
pub fn new(p: &PoWConfig, v: &VisitorResult) -> Self {
CacheBuilder::default()
.string(p.string.clone())
.difficulty_factor(v.difficulty_factor)
.duration(v.duration)
.build()
.unwrap()
}
}
/// Message to retrive the the difficulty factor for the specified
/// string from the cache
#[derive(Message)]
#[rtype(result = "CaptchaResult<Option<u32>>")]
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pub struct Retrive(pub String);
/// Message to delete cached PoW difficulty factor and string
/// when they expire
#[derive(Message)]
#[rtype(result = "CaptchaResult<()>")]
pub struct DeleteString(pub String);
}