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Merge pull request #5511 from SparkiDev/sp_submod_neg_fix

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SP math: don't modify sign in sp_div
This commit is contained in:
David Garske
2022-08-26 08:07:37 -07:00
committed by GitHub
parent 1976601811 8b2719cc83
commit d84bfd511d
1 changed files with 2 additions and 7 deletions
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9
wolfcrypt/src/sp_int.c
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@@ -7021,6 +7021,8 @@ void sp_rshb(sp_int* a, int n, sp_int* r)
*/
static int _sp_div(sp_int* a, sp_int* d, sp_int* r, sp_int* trial)
{
int err = MP_OKAY;
int i;
#ifdef WOLFSSL_SP_SMALL
int c;
#else
@@ -7034,16 +7036,9 @@ static int _sp_div(sp_int* a, sp_int* d, sp_int* r, sp_int* trial)
sp_int_digit st;
#endif
#endif /* WOLFSSL_SP_SMALL */
int err = MP_OKAY;
int i;
sp_int_digit t;
sp_int_digit dt;
#ifdef WOLFSSL_SP_INT_NEGATIVE
a->sign = MP_ZPOS;
d->sign = MP_ZPOS;
#endif /* WOLFSSL_SP_INT_NEGATIVE */
r->used = a->used - d->used + 1;
sp_clear(r);
r->used = a->used - d->used + 1;