Generate cards

src/card_deck.rs

+use super::prime_gen;
+use rand::thread_rng;
+use rand::seq::SliceRandom;
+use num_bigint::{BigUint};
+
+#[derive(Debug)]
+pub struct Card {
+    p: BigUint,
+    q: BigUint,
+    N: BigUint
+}
+
+pub fn gen_card_deck(prime_size: usize, deck_size: usize) -> Vec::<Box<Card>> {
+    let mut cards: Vec::<Box<Card>> = Vec::new();
+
+    let _3 = BigUint::from(3u32);
+    for i in 0..deck_size {
+        println!("Generating card {}", i);
+        // generate p_i, q_i s.t. p_i congruent q_i = 3 mod 4
+        let mut p_i: BigUint;
+        let mut q_i: BigUint;
+        loop {
+            p_i = prime_gen::gen_prime(prime_size);
+            q_i = prime_gen::gen_prime(prime_size);
+            if &p_i % 4u16 == _3 && &q_i % 4u16 == _3 { break; }
+        }
+        let N = &p_i * &q_i;
+        let c = Card { p: p_i.clone(), q: q_i.clone(), N: N.clone() };
+        cards.push(Box::new(c));
+    }
+    cards.shuffle(&mut thread_rng());
+    cards
+}
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