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|
use crate::utils::powmod;
use crate::window_state::WindowState;
use eframe::egui;
#[derive(PartialEq, Eq)]
enum State {
Idle,
Requested,
Generated,
}
pub struct Window {
state: State,
p: u64,
g: u64,
a: u64,
y: u64,
}
impl Default for Window {
fn default() -> Self {
Self {
state: State::Idle,
p: 0,
g: 0,
a: 0,
y: 0,
}
}
}
fn min_order(x: u64, order: u64) -> u64 {
let mut min = 0;
let mut pow = x;
for power in 1..order {
if pow == 1 {
min = power;
break;
}
pow = (pow * x) % order;
}
return min;
}
impl Window {
fn generate(&mut self) {
let primes = erathosphene(10000);
let i = fastrand::usize(4..primes.len());
self.p = primes[i as usize];
for i in 1..self.p {
if min_order(i, self.p) == self.p - 1 {
self.g = i;
break;
}
}
self.a = fastrand::u64(1..=self.p - 1);
self.y = powmod(self.g, self.a, self.p);
}
}
fn erathosphene(n: u64) -> Vec<u64> {
let mut is_prime = vec![true; n as usize];
let mut p = 2;
while p * p < n {
let mut cur = p * p;
while cur < n {
is_prime[cur as usize] = false;
cur += p;
}
while !is_prime[(p + 1) as usize] {
p += 1;
}
p += 1
}
let mut primes = Vec::new();
is_prime.iter().enumerate().for_each(|(i, p)| {
if *p {
primes.push(i as u64);
}
});
return primes;
}
impl WindowState for Window {
fn get_name(&self) -> &str {
"Генерация ключей"
}
fn update(&mut self, ui: &mut egui::Ui) {
if ui.button("Сгенерировать").clicked() {
self.state = State::Requested;
}
if self.state == State::Requested {
self.generate();
self.state = State::Generated;
}
if self.state == State::Generated {
ui.horizontal(|ui| {
ui.label("Модуль p:");
let mut tmp = self.p.to_string();
ui.add_enabled(false, egui::TextEdit::singleline(&mut tmp));
});
ui.horizontal(|ui| {
ui.label("Порождающий элемент g группы Z_p:");
let mut tmp = self.g.to_string();
ui.add_enabled(false, egui::TextEdit::singleline(&mut tmp));
});
ui.horizontal(|ui| {
ui.label("Секретный ключ a:");
let mut tmp = self.a.to_string();
ui.add_enabled(false, egui::TextEdit::singleline(&mut tmp));
});
ui.horizontal(|ui| {
ui.label("Публичный ключ y:");
let mut tmp = self.y.to_string();
ui.add_enabled(false, egui::TextEdit::singleline(&mut tmp));
});
if ui.button("Скопировать публичный ключ").clicked() {
ui.output().copied_text = format!("{},{}", self.y, self.p);
}
if ui.button("Скопировать секретный ключ").clicked() {
ui.output().copied_text = format!("{},{},{}", self.g, self.a, self.p);
}
}
}
}
|
