forked from realaravinth/tmp
138 lines
3.7 KiB
Rust
138 lines
3.7 KiB
Rust
/*
|
|
* 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/>.
|
|
*/
|
|
|
|
use serde::{Deserialize, Serialize};
|
|
|
|
use crate::defense::Defense;
|
|
use crate::errors::*;
|
|
|
|
/// Builder for [MCaptcha]
|
|
#[derive(Clone, Serialize, Deserialize, Debug)]
|
|
pub struct MCaptchaBuilder {
|
|
visitor_threshold: u32,
|
|
defense: Option<Defense>,
|
|
duration: Option<u64>,
|
|
}
|
|
|
|
impl Default for MCaptchaBuilder {
|
|
fn default() -> Self {
|
|
MCaptchaBuilder {
|
|
visitor_threshold: 0,
|
|
defense: None,
|
|
duration: None,
|
|
}
|
|
}
|
|
}
|
|
|
|
impl MCaptchaBuilder {
|
|
/// set defense
|
|
pub fn defense(&mut self, d: Defense) -> &mut Self {
|
|
self.defense = Some(d);
|
|
self
|
|
}
|
|
|
|
/// set duration
|
|
pub fn duration(&mut self, d: u64) -> &mut Self {
|
|
self.duration = Some(d);
|
|
self
|
|
}
|
|
|
|
/// Builds new [MCaptcha]
|
|
pub fn build(self: &mut MCaptchaBuilder) -> CaptchaResult<MCaptcha> {
|
|
if self.duration.is_none() {
|
|
Err(CaptchaError::PleaseSetValue("duration".into()))
|
|
} else if self.defense.is_none() {
|
|
Err(CaptchaError::PleaseSetValue("defense".into()))
|
|
} else if self.duration <= Some(0) {
|
|
Err(CaptchaError::CaptchaDurationZero)
|
|
} else {
|
|
let m = MCaptcha {
|
|
duration: self.duration.unwrap(),
|
|
defense: self.defense.clone().unwrap(),
|
|
visitor_threshold: self.visitor_threshold,
|
|
};
|
|
Ok(m)
|
|
}
|
|
}
|
|
}
|
|
|
|
#[derive(Clone, Serialize, Deserialize, Debug)]
|
|
pub struct MCaptcha {
|
|
visitor_threshold: u32,
|
|
defense: Defense,
|
|
duration: u64,
|
|
}
|
|
|
|
impl From<MCaptcha> for crate::master::CreateMCaptcha {
|
|
fn from(m: MCaptcha) -> Self {
|
|
Self {
|
|
levels: m.defense.into(),
|
|
duration: m.duration,
|
|
}
|
|
}
|
|
}
|
|
|
|
impl MCaptcha {
|
|
/// increments the visitor count by one
|
|
#[inline]
|
|
pub fn add_visitor(&mut self) {
|
|
self.visitor_threshold += 1;
|
|
if self.visitor_threshold > self.defense.visitor_threshold() {
|
|
self.defense.tighten_up();
|
|
} else {
|
|
self.defense.loosen_up();
|
|
}
|
|
}
|
|
|
|
/// decrements the visitor count by specified count
|
|
#[inline]
|
|
pub fn decrement_visitor_by(&mut self, count: u32) {
|
|
if self.visitor_threshold > 0 {
|
|
if self.visitor_threshold >= count {
|
|
self.visitor_threshold -= count;
|
|
} else {
|
|
self.visitor_threshold = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// get current difficulty factor
|
|
#[inline]
|
|
pub fn get_difficulty(&self) -> u32 {
|
|
self.defense.get_difficulty()
|
|
}
|
|
|
|
/// get [Counter]'s lifetime
|
|
#[inline]
|
|
pub fn get_duration(&self) -> u64 {
|
|
self.duration
|
|
}
|
|
|
|
/// get [Counter]'s current visitor_threshold
|
|
#[inline]
|
|
pub fn get_visitors(&self) -> u32 {
|
|
self.visitor_threshold
|
|
}
|
|
|
|
/// get mCaptcha's defense configuration
|
|
#[inline]
|
|
pub fn get_defense(&self) -> Defense {
|
|
self.defense.clone()
|
|
}
|
|
}
|