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|
use crate::window_state::WindowState;
use eframe::egui;
#[derive(PartialEq, Eq)]
enum State {
Idle,
Requested,
Generated,
}
pub struct Window {
state: State,
n: u64,
e: u64,
d: u64,
k: u64,
phi: u64,
}
impl Default for Window {
fn default() -> Self {
Self {
state: State::Idle,
n: 0,
e: 0,
d: 0,
k: 0,
phi: 0,
}
}
}
impl Window {
fn generate(&mut self) {
let primes = erathosphene(10000);
let i = fastrand::usize(4..primes.len());
let mut j = fastrand::usize(4..primes.len());
while j == i {
j = fastrand::usize(..primes.len());
}
let p = primes[i as usize];
let q = primes[j as usize];
self.n = p * q;
self.phi = (p - 1) * (q - 1);
let mut e = self.phi;
loop {
let (d, x, _) = extended_gcd(e as i64, self.phi as i64);
if d != 1 {
e = fastrand::u64(2..self.phi);
} else {
self.e = e;
self.d = if x < 0 { x + self.phi as i64 } else { x } as u64;
break;
}
}
let mut i = e;
let mut order = 1;
loop {
if i == 1 {
break;
} else {
order += 1;
i = (i * e) % self.phi;
}
}
self.k = order;
}
}
fn extended_gcd(a: i64, b: i64) -> (i64, i64, i64) {
if a == 0 {
return (b, 0, 1);
}
let (d, x, y) = extended_gcd(b % a, a);
return (d, y - (b / a) * x, x);
}
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 n:");
let mut tmp = self.n.to_string();
ui.add_enabled(false, egui::TextEdit::singleline(&mut tmp));
});
ui.horizontal(|ui| {
ui.label("Открытая экспонента e:");
let mut tmp = self.e.to_string();
ui.add_enabled(false, egui::TextEdit::singleline(&mut tmp));
});
ui.horizontal(|ui| {
ui.label("Секретная экспонента d:");
let mut tmp = self.d.to_string();
ui.add_enabled(false, egui::TextEdit::singleline(&mut tmp));
});
if ui.button("Скопировать открытый ключ").clicked() {
ui.output().copied_text = format!("{},{}", self.e, self.n);
}
if ui.button("Скопировать закрытый ключ").clicked() {
ui.output().copied_text = format!("{},{}", self.d, self.n);
}
ui.label("Порядок элемента e по модулю phi(n):");
let mut tmp = self.k.to_string();
ui.add_enabled(false, egui::TextEdit::singleline(&mut tmp));
if ui.button("Скопировать открытую экспоненту e").clicked()
{
ui.output().copied_text = format!("{}", self.e);
}
if ui.button("Скопировать phi(n)").clicked() {
ui.output().copied_text = format!("{}", self.phi);
}
if ui.button("Скопировать порядок").clicked() {
ui.output().copied_text = format!("{}", self.k);
}
}
}
}
|
