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SP int: mont_red - check size of a relative to m

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Sean Parkinson
2021-02-08 10:07:15 +10:00
parent 2933db8915
commit aefddaf2b8
1 changed files with 3 additions and 0 deletions
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3
wolfcrypt/src/sp_int.c
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@ -12246,6 +12246,9 @@ int sp_mont_red(sp_int* a, sp_int* m, sp_int_digit mp)
if ((a == NULL) || (m == NULL) || sp_iszero(m)) { if ((a == NULL) || (m == NULL) || sp_iszero(m)) {
err = MP_VAL; err = MP_VAL;
} }
else if (a->size < m->used * 2 + 1) {
err = MP_VAL;
}
else { else {
err = _sp_mont_red(a, m, mp); err = _sp_mont_red(a, m, mp);
} }