Commit 449bd384 authored by Nils Larsch's avatar Nils Larsch
Browse files

bugfix: 0 - w (w != 0) is actually negative

parent 3eeaab4b

crypto/bn/bn_word.c

+7 −1
Original line number Diff line number Diff line
@@ -175,7 +175,13 @@ int BN_sub_word(BIGNUM *a, BN_ULONG w) 
	/* degenerate case: w is zero */

	if (!w) return 1;

	/* degenerate case: a is zero */

	if(BN_is_zero(a)) return BN_set_word(a,w);

	if(BN_is_zero(a))

		{

		i = BN_set_word(a,w);

		if (i != 0)

			BN_set_negative(a, 1);

		return i;

		}

	/* handle 'a' when negative */

	if (a->neg)

		{