Fix reduce.c's overflowing multiplication
Cette révision appartient à :
Parent
ea5ede6e80
révision
3ef983c459
@ -18,7 +18,7 @@ int16_t PQCLEAN_KYBER102490S_CLEAN_montgomery_reduce(int32_t a) {
|
||||
int32_t t;
|
||||
int16_t u;
|
||||
|
||||
u = (int16_t)(a * QINV);
|
||||
u = (int16_t)(a * (int64_t)QINV);
|
||||
t = (int32_t)u * KYBER_Q;
|
||||
t = a - t;
|
||||
t >>= 16;
|
||||
|
@ -18,7 +18,7 @@ int16_t PQCLEAN_KYBER1024_CLEAN_montgomery_reduce(int32_t a) {
|
||||
int32_t t;
|
||||
int16_t u;
|
||||
|
||||
u = (int16_t)(a * QINV);
|
||||
u = (int16_t)(a * (int64_t)QINV);
|
||||
t = (int32_t)u * KYBER_Q;
|
||||
t = a - t;
|
||||
t >>= 16;
|
||||
|
@ -18,7 +18,7 @@ int16_t PQCLEAN_KYBER51290S_CLEAN_montgomery_reduce(int32_t a) {
|
||||
int32_t t;
|
||||
int16_t u;
|
||||
|
||||
u = (int16_t)(a * QINV);
|
||||
u = (int16_t)(a * (int64_t)QINV);
|
||||
t = (int32_t)u * KYBER_Q;
|
||||
t = a - t;
|
||||
t >>= 16;
|
||||
|
@ -18,7 +18,7 @@ int16_t PQCLEAN_KYBER512_CLEAN_montgomery_reduce(int32_t a) {
|
||||
int32_t t;
|
||||
int16_t u;
|
||||
|
||||
u = (int16_t)(a * QINV);
|
||||
u = (int16_t)(a * (int64_t)QINV);
|
||||
t = (int32_t)u * KYBER_Q;
|
||||
t = a - t;
|
||||
t >>= 16;
|
||||
|
@ -18,7 +18,7 @@ int16_t PQCLEAN_KYBER76890S_CLEAN_montgomery_reduce(int32_t a) {
|
||||
int32_t t;
|
||||
int16_t u;
|
||||
|
||||
u = (int16_t)(a * QINV);
|
||||
u = (int16_t)(a * (int64_t)QINV);
|
||||
t = (int32_t)u * KYBER_Q;
|
||||
t = a - t;
|
||||
t >>= 16;
|
||||
|
@ -18,7 +18,7 @@ int16_t PQCLEAN_KYBER768_CLEAN_montgomery_reduce(int32_t a) {
|
||||
int32_t t;
|
||||
int16_t u;
|
||||
|
||||
u = (int16_t)(a * QINV);
|
||||
u = (int16_t)(a * (int64_t)QINV);
|
||||
t = (int32_t)u * KYBER_Q;
|
||||
t = a - t;
|
||||
t >>= 16;
|
||||
|
Chargement…
Référencer dans un nouveau ticket
Block a user