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Merge pull request #4613 from SparkiDev/sp_div_max

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SP math all: div handling of length of dividend
This commit is contained in:
David Garske
2021-12-20 15:10:35 -08:00
committed by GitHub
parent 360a513696 a3d46bee32
commit 3644d97dd8
1 changed files with 4 additions and 0 deletions
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wolfcrypt/src/sp_int.c
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@@ -4615,6 +4615,10 @@ int sp_div(sp_int* a, sp_int* d, sp_int* r, sp_int* rem)
if ((err == MP_OKAY) && (rem != NULL) && (rem->size < a->used + 1)) { if ((err == MP_OKAY) && (rem != NULL) && (rem->size < a->used + 1)) {
err = MP_VAL; err = MP_VAL;
} }
/* May need to shift number being divided left into a new word. */
if ((err == MP_OKAY) && (a->used == SP_INT_DIGITS)) {
err = MP_VAL;
}
#if 0 #if 0
if (err == MP_OKAY) { if (err == MP_OKAY) {