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Merge pull request #7032 from SparkiDev/sp_int_neg_mont_red

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SP int neg sp_mont_red_ex: disallow negative numbers
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JacobBarthelmeh
2023-12-06 15:04:46 -07:00
committed by GitHub
parent 2c9208b0c6 cf8a6efaa5
commit 0ffb586030
1 changed files with 5 additions and 0 deletions
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wolfcrypt/src/sp_int.c
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@ -17524,6 +17524,11 @@ int sp_mont_red_ex(sp_int* a, const sp_int* m, sp_int_digit mp, int ct)
if ((a == NULL) || (m == NULL) || sp_iszero(m)) { if ((a == NULL) || (m == NULL) || sp_iszero(m)) {
err = MP_VAL; err = MP_VAL;
} }
#ifdef WOLFSSL_SP_INT_NEGATIVE
else if ((a->sign == MP_NEG) || (m->sign == MP_NEG)) {
err = MP_VAL;
}
#endif
/* Ensure a has enough space for calculation. */ /* Ensure a has enough space for calculation. */
else if (a->size < m->used * 2 + 1) { else if (a->size < m->used * 2 + 1) {
err = MP_VAL; err = MP_VAL;