use freezero() instead of memset/explicit_bzero + free. Substantially

reduces conditional logic (-218, +82).

MOD_EXP_CTIME_MIN_CACHE_LINE_WIDTH cache alignment calculation bn/bn_exp.c
wasn'tt quite right.  Two other tricky bits with ASN1_STRING_FLAG_NDEF and
BN_FLG_STATIC_DATA where the condition cannot be collapsed completely.

Passes regress.  ok beck

1 files changed, 2 insertions, 3 deletions

diff --git a/src/lib/libcrypto/ec/ec_mult.c b/src/lib/libcrypto/ec/ec_mult.c
index e44104d21c..a565263bb6 100644
--- a/src/lib/libcrypto/ec/ec_mult.c
+++ b/src/lib/libcrypto/ec/ec_mult.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ec_mult.c,v 1.20 2017/01/29 17:49:23 beck Exp $ */
+/* $OpenBSD: ec_mult.c,v 1.21 2017/05/02 03:59:44 deraadt Exp $ */
 /*
  * Originally written by Bodo Moeller and Nils Larsch for the OpenSSL project.
  */
@@ -177,8 +177,7 @@ ec_pre_comp_clear_free(void *pre_)
                 }
                 free(pre->points);
         }
-        explicit_bzero(pre, sizeof *pre);
-        free(pre);
+        freezero(pre, sizeof *pre);
 }