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/bio_enc.c b/src/lib/libcrypto/evp/bio_enc.c
index 1920c6d180..7c7cf9a8b3 100644
--- a/src/lib/libcrypto/evp/bio_enc.c
+++ b/src/lib/libcrypto/evp/bio_enc.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: bio_enc.c,v 1.19 2015/09/10 15:56:25 jsing Exp $ */
+/* $OpenBSD: bio_enc.c,v 1.20 2017/05/02 03:59:44 deraadt Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -135,8 +135,7 @@ enc_free(BIO *a)
                 return (0);
         b = (BIO_ENC_CTX *)a->ptr;
         EVP_CIPHER_CTX_cleanup(&(b->cipher));
-        explicit_bzero(a->ptr, sizeof(BIO_ENC_CTX));
-        free(a->ptr);
+        freezero(a->ptr, sizeof(BIO_ENC_CTX));
         a->ptr = NULL;
         a->init = 0;
         a->flags = 0;