From 96c4a26624f0ef733d4dc452371b12634dec9398 Mon Sep 17 00:00:00 2001
From: Josh Stone <cuviper@gmail.com>
Date: Sun, 22 Oct 2017 15:37:48 -0700
Subject: [PATCH] bigint::monty: simplify modpow parameter init

---
 bigint/src/monty.rs | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/bigint/src/monty.rs b/bigint/src/monty.rs
index 2c427b4..5d5ec9c 100644
--- a/bigint/src/monty.rs
+++ b/bigint/src/monty.rs
@@ -106,10 +106,9 @@ pub fn monty_modpow(a: &BigUint, exp: &BigUint, modulus: &BigUint) -> BigUint{
     let mr = MontyReducer::new(modulus);
 
     // Calculate the Montgomery parameter
-    let mut r : BigUint = One::one();
-    while &r < mr.p {
-        r = r << 32;
-    }
+    let mut v = vec![0; mr.p.data.len()];
+    v.push(1);
+    let r = BigUint::new(v);
 
     // Map the base to the Montgomery domain
     let mut apri = a * &r % mr.p;