Use safer sizeof variant in malloc

For a local variable:
        TYPE *p;
Allocations like this are "risky":
        p = OPENSSL_malloc(sizeof(TYPE));
if the type of p changes, and the malloc call isn't updated, you
could get memory corruption.  Instead do this:
        p = OPENSSL_malloc(sizeof(*p));
Also fixed a few memset() calls that I noticed while doing this.

Reviewed-by: Richard Levitte <levitte@openssl.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/apps/s_cb.c b/apps/s_cb.c
index 13a3a25652..d371cc9b98 100644
--- a/apps/s_cb.c
+++ b/apps/s_cb.c
@@ -1173,7 +1173,7 @@ void ssl_ctx_set_excert(SSL_CTX *ctx, SSL_EXCERT *exc)
 
 static int ssl_excert_prepend(SSL_EXCERT **pexc)
 {
-    SSL_EXCERT *exc = app_malloc(sizeof *exc, "prepend cert");
+    SSL_EXCERT *exc = app_malloc(sizeof(*exc), "prepend cert");
 
     exc->certfile = NULL;
     exc->keyfile = NULL;