Commit 7a8645d1 authored by Bodo Möller's avatar Bodo Möller
Browse files

avoid SIGSEGV 

Submitted by: Nils Larsch, Douglas Stebila
parent 5bf73873

crypto/bn/bn_gf2m.c

+3 −3
Original line number Diff line number Diff line
@@ -316,10 +316,10 @@ int BN_GF2m_mod_arr(BIGNUM *r, const BIGNUM *a, const unsigned int p[]) 
	int n, dN, d0, d1;

	BN_ULONG zz, *z;

	

	/* Since the algorithm does reduction in place, if a == r, copy the

	/* Since the algorithm does reduction in the r value, if a != r, copy the

	 * contents of a into r so we can do reduction in r. 

	 */

	if ((a != NULL) && (a->d != r->d))

	if (a != r)

		{

		if (!bn_wexpand(r, a->top)) return 0;

		for (j = 0; j < a->top; j++)
@@ -427,7 +427,7 @@ int BN_GF2m_mod_mul_arr(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const unsig 
	BN_CTX_start(ctx);

	if ((s = BN_CTX_get(ctx)) == NULL) goto err;

	

	zlen = a->top + b->top;

	zlen = a->top + b->top + 4;

	if (!bn_wexpand(s, zlen)) goto err;

	s->top = zlen;