diff options
| author | Bodo Möller <bodo@openssl.org> | 2000-12-03 09:39:04 +0000 |
|---|---|---|
| committer | Bodo Möller <bodo@openssl.org> | 2000-12-03 09:39:04 +0000 |
| commit | 152a689cf93f2bac78c1b0d6ee24c86640ae0f34 (patch) | |
| tree | 7493c7de70e4bbd8fe3ea01c1d705c4f523b5047 /crypto/bn/bn_lib.c | |
| parent | 35a99b6380231992457f9e4133d3c3e509b85d0d (diff) | |
Don't allow BIGNUMs to become so large that computations with dmax
might overflow.
Diffstat (limited to 'crypto/bn/bn_lib.c')
| -rw-r--r-- | crypto/bn/bn_lib.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/crypto/bn/bn_lib.c b/crypto/bn/bn_lib.c index 050e02bd3a..096bcf1835 100644 --- a/crypto/bn/bn_lib.c +++ b/crypto/bn/bn_lib.c @@ -312,6 +312,12 @@ static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words) const BN_ULONG *B; int i; + if (words > (INT_MAX/(4*BN_BITS2))) + { + BNerr(BN_F_BN_EXPAND_INTERNAL,BN_R_TOO_LARGE); + return NULL; + } + bn_check_top(b); if (BN_get_flags(b,BN_FLG_STATIC_DATA)) { |