From 6047ae532a0418016e524ecba93224cf6f242723 Mon Sep 17 00:00:00 2001
From: "John M. Schanck" <jschanck@uwaterloo.ca>
Date: Wed, 2 Sep 2020 17:30:26 -0400
Subject: [PATCH] NTRU Prime: avoid narrowing in loop iteration

---
 crypto_kem/ntrulpr653/clean/crypto_sort_int32.c | 3 ++-
 crypto_kem/ntrulpr761/clean/crypto_sort_int32.c | 3 ++-
 crypto_kem/ntrulpr857/clean/crypto_sort_int32.c | 3 ++-
 crypto_kem/sntrup653/clean/crypto_sort_int32.c  | 3 ++-
 crypto_kem/sntrup761/clean/crypto_sort_int32.c  | 3 ++-
 crypto_kem/sntrup857/clean/crypto_sort_int32.c  | 3 ++-
 6 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/crypto_kem/ntrulpr653/clean/crypto_sort_int32.c b/crypto_kem/ntrulpr653/clean/crypto_sort_int32.c
index cdb63739..3f27c9f1 100644
--- a/crypto_kem/ntrulpr653/clean/crypto_sort_int32.c
+++ b/crypto_kem/ntrulpr653/clean/crypto_sort_int32.c
@@ -16,7 +16,8 @@
 
 /* assume 2 <= n <= 0x40000000 */
 void PQCLEAN_NTRULPR653_CLEAN_crypto_sort_int32(int32_t *x, long long n) {
-    int32 top, p, q, r, i, j;
+    int32 top, p, q, r, i;
+    long long j;
 
     top = 1;
     while (top < n - top) {
diff --git a/crypto_kem/ntrulpr761/clean/crypto_sort_int32.c b/crypto_kem/ntrulpr761/clean/crypto_sort_int32.c
index f46d6fe5..a23017c3 100644
--- a/crypto_kem/ntrulpr761/clean/crypto_sort_int32.c
+++ b/crypto_kem/ntrulpr761/clean/crypto_sort_int32.c
@@ -16,7 +16,8 @@
 
 /* assume 2 <= n <= 0x40000000 */
 void PQCLEAN_NTRULPR761_CLEAN_crypto_sort_int32(int32_t *x, long long n) {
-    int32 top, p, q, r, i, j;
+    int32 top, p, q, r, i;
+    long long j;
 
     top = 1;
     while (top < n - top) {
diff --git a/crypto_kem/ntrulpr857/clean/crypto_sort_int32.c b/crypto_kem/ntrulpr857/clean/crypto_sort_int32.c
index 5321e8b8..354d5803 100644
--- a/crypto_kem/ntrulpr857/clean/crypto_sort_int32.c
+++ b/crypto_kem/ntrulpr857/clean/crypto_sort_int32.c
@@ -16,7 +16,8 @@
 
 /* assume 2 <= n <= 0x40000000 */
 void PQCLEAN_NTRULPR857_CLEAN_crypto_sort_int32(int32_t *x, long long n) {
-    int32 top, p, q, r, i, j;
+    int32 top, p, q, r, i;
+    long long j;
 
     top = 1;
     while (top < n - top) {
diff --git a/crypto_kem/sntrup653/clean/crypto_sort_int32.c b/crypto_kem/sntrup653/clean/crypto_sort_int32.c
index 04475629..e6fc17a5 100644
--- a/crypto_kem/sntrup653/clean/crypto_sort_int32.c
+++ b/crypto_kem/sntrup653/clean/crypto_sort_int32.c
@@ -16,7 +16,8 @@
 
 /* assume 2 <= n <= 0x40000000 */
 void PQCLEAN_SNTRUP653_CLEAN_crypto_sort_int32(int32_t *x, long long n) {
-    int32 top, p, q, r, i, j;
+    int32 top, p, q, r, i;
+    long long j;
 
     top = 1;
     while (top < n - top) {
diff --git a/crypto_kem/sntrup761/clean/crypto_sort_int32.c b/crypto_kem/sntrup761/clean/crypto_sort_int32.c
index d6b6f7b8..014421db 100644
--- a/crypto_kem/sntrup761/clean/crypto_sort_int32.c
+++ b/crypto_kem/sntrup761/clean/crypto_sort_int32.c
@@ -16,7 +16,8 @@
 
 /* assume 2 <= n <= 0x40000000 */
 void PQCLEAN_SNTRUP761_CLEAN_crypto_sort_int32(int32_t *x, long long n) {
-    int32 top, p, q, r, i, j;
+    int32 top, p, q, r, i;
+    long long j;
 
     top = 1;
     while (top < n - top) {
diff --git a/crypto_kem/sntrup857/clean/crypto_sort_int32.c b/crypto_kem/sntrup857/clean/crypto_sort_int32.c
index 49ce3678..4d70426b 100644
--- a/crypto_kem/sntrup857/clean/crypto_sort_int32.c
+++ b/crypto_kem/sntrup857/clean/crypto_sort_int32.c
@@ -16,7 +16,8 @@
 
 /* assume 2 <= n <= 0x40000000 */
 void PQCLEAN_SNTRUP857_CLEAN_crypto_sort_int32(int32_t *x, long long n) {
-    int32 top, p, q, r, i, j;
+    int32 top, p, q, r, i;
+    long long j;
 
     top = 1;
     while (top < n - top) {