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, 2 insertions, 2 deletions

diff --git a/crypto/asn1/asn_mime.c b/crypto/asn1/asn_mime.c
index e8411a82ad..da5b417048 100644
--- a/crypto/asn1/asn_mime.c
+++ b/crypto/asn1/asn_mime.c
@@ -844,7 +844,7 @@ static MIME_HEADER *mime_hdr_new(char *name, char *value)
             }
         }
     }
-    mhdr = OPENSSL_malloc(sizeof(MIME_HEADER));
+    mhdr = OPENSSL_malloc(sizeof(*mhdr));
     if (!mhdr)
         goto err;
     mhdr->name = tmpname;
@@ -883,7 +883,7 @@ static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value)
             goto err;
     }
     /* Parameter values are case sensitive so leave as is */
-    mparam = OPENSSL_malloc(sizeof(MIME_PARAM));
+    mparam = OPENSSL_malloc(sizeof(*mparam));
     if (!mparam)
         goto err;
     mparam->param_name = tmpname;