diff options
author | Bodo Möller <bodo@openssl.org> | 2010-02-23 10:36:30 +0000 |
---|---|---|
committer | Bodo Möller <bodo@openssl.org> | 2010-02-23 10:36:30 +0000 |
commit | 7fe747d1ebd76151dc8b066fce103a487bedd17a (patch) | |
tree | 3f0332bee73e16a2635cc45533ba164011824087 /crypto/ec | |
parent | 32567c9f3be1ba5c47079da5e881ded20fa7a078 (diff) |
Always check bn_wexpend() return values for failure (CVE-2009-3245).
(The CHANGES entry covers the change from PR #2111 as well, submitted by
Martin Olsson.)
Submitted by: Neel Mehta
Diffstat (limited to 'crypto/ec')
-rw-r--r-- | crypto/ec/ec2_smpl.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/crypto/ec/ec2_smpl.c b/crypto/ec/ec2_smpl.c index 01d8483c3a..cf357b462a 100644 --- a/crypto/ec/ec2_smpl.c +++ b/crypto/ec/ec2_smpl.c @@ -176,8 +176,8 @@ int ec_GF2m_simple_group_copy(EC_GROUP *dest, const EC_GROUP *src) dest->poly[3] = src->poly[3]; dest->poly[4] = src->poly[4]; dest->poly[5] = src->poly[5]; - bn_wexpand(&dest->a, (int)(dest->poly[0] + BN_BITS2 - 1) / BN_BITS2); - bn_wexpand(&dest->b, (int)(dest->poly[0] + BN_BITS2 - 1) / BN_BITS2); + if (bn_wexpand(&dest->a, (int)(dest->poly[0] + BN_BITS2 - 1) / BN_BITS2) == NULL) return 0; + if (bn_wexpand(&dest->b, (int)(dest->poly[0] + BN_BITS2 - 1) / BN_BITS2) == NULL) return 0; for (i = dest->a.top; i < dest->a.dmax; i++) dest->a.d[i] = 0; for (i = dest->b.top; i < dest->b.dmax; i++) dest->b.d[i] = 0; return 1; @@ -201,12 +201,12 @@ int ec_GF2m_simple_group_set_curve(EC_GROUP *group, /* group->a */ if (!BN_GF2m_mod_arr(&group->a, a, group->poly)) goto err; - bn_wexpand(&group->a, (int)(group->poly[0] + BN_BITS2 - 1) / BN_BITS2); + if(bn_wexpand(&group->a, (int)(group->poly[0] + BN_BITS2 - 1) / BN_BITS2) == NULL) goto err; for (i = group->a.top; i < group->a.dmax; i++) group->a.d[i] = 0; /* group->b */ if (!BN_GF2m_mod_arr(&group->b, b, group->poly)) goto err; - bn_wexpand(&group->b, (int)(group->poly[0] + BN_BITS2 - 1) / BN_BITS2); + if(bn_wexpand(&group->b, (int)(group->poly[0] + BN_BITS2 - 1) / BN_BITS2) == NULL) goto err; for (i = group->b.top; i < group->b.dmax; i++) group->b.d[i] = 0; ret = 1; |