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