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/evp/e_aes.c b/src/lib/libcrypto/evp/e_aes.c
index 97cb5154a5..7c713db026 100644
--- a/src/lib/libcrypto/evp/e_aes.c
+++ b/src/lib/libcrypto/evp/e_aes.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: e_aes.c,v 1.33 2017/01/31 13:17:21 inoguchi Exp $ */
+/* $OpenBSD: e_aes.c,v 1.34 2017/05/02 03:59:44 deraadt Exp $ */
 /* ====================================================================
  * Copyright (c) 2001-2011 The OpenSSL Project.  All rights reserved.
  *
@@ -1422,8 +1422,7 @@ aead_aes_gcm_cleanup(EVP_AEAD_CTX *ctx)
 {
         struct aead_aes_gcm_ctx *gcm_ctx = ctx->aead_state;
 
-        explicit_bzero(gcm_ctx, sizeof(*gcm_ctx));
-        free(gcm_ctx);
+        freezero(gcm_ctx, sizeof(*gcm_ctx));
 }
 
 static int