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SP int: sp_radix_size when radix 10 fix temp size

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SP int should be able to calculate size of encoded number for a radix of
10 when mp_int has all digits used.
sp_radix_size declared a temporary mp_int of 1 greater than input. Don't
need it 1 greater. Stack declaration of maximum plus one caused address
sanitizer error.
Changed temporary mp_int to be same size as input mp_int.
This commit is contained in:
Sean Parkinson
2023-04-17 10:09:02 +10:00
parent d099fe34b5
commit 8994aab0ed
1 changed files with 3 additions and 3 deletions
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6
wolfcrypt/src/sp_int.c
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@ -17825,12 +17825,12 @@ int sp_radix_size(const sp_int* a, int radix, int* size)
*size = 1 + 1;
}
else {
DECL_SP_INT(t, a->used + 1);
DECL_SP_INT(t, a->used);
/* Temporary to be divided by 10. */
ALLOC_SP_INT(t, a->used + 1, err, NULL);
ALLOC_SP_INT(t, a->used, err, NULL);
if (err == MP_OKAY) {
t->size = a->used + 1;
t->size = a->used;
err = sp_copy(a, t);
}