-/* totally untested */
-
/* crypto/bn/bn_kron.c */
/* ====================================================================
* Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved.
int BN_kronecker(const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
{
int i;
- int ret;
+ int ret = -2; /* avoid 'uninitialized' warning */
int err = 0;
BIGNUM *A, *B, *tmp;
/* In 'tab', only odd-indexed entries are relevant:
/* Cohen's step 4: */
/* multiply 'ret' by $(-1)^{(A-1)(B-1)/4}$ */
- if (BN_lsw(A) & BN_lsw(B) & 2)
+ if ((A->neg ? ~BN_lsw(A) : BN_lsw(A)) & BN_lsw(B) & 2)
ret = -ret;
/* (A, B) := (B mod |A|, |A|) */