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Use more explicit way of copying pointer value to a buffer

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The code initializing GMK Counter uses the group pointer value as extra
entropy and to distinguish different group instances. Some static
analyzers complain about the sizeof(pointer) with memcpy, so use a more
explicit type casting to make it more obvious what the code is doing.

Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2013-01-01 20:26:20 +02:00
parent a50414c322
commit 559cdabb0f
1 changed files with 4 additions and 2 deletions
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6
src/ap/wpa_auth.c
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@ -282,8 +282,9 @@ static void wpa_auth_pmksa_free_cb(struct rsn_pmksa_cache_entry *entry,
static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth,
struct wpa_group *group)
{
u8 buf[ETH_ALEN + 8 + sizeof(group)];
u8 buf[ETH_ALEN + 8 + sizeof(unsigned long)];
u8 rkey[32];
unsigned long ptr;
if (random_get_bytes(group->GMK, WPA_GMK_LEN) < 0)
return -1;
@ -295,7 +296,8 @@ static int wpa_group_init_gmk_and_counter(struct wpa_authenticator *wpa_auth,
*/
os_memcpy(buf, wpa_auth->addr, ETH_ALEN);
wpa_get_ntp_timestamp(buf + ETH_ALEN);
os_memcpy(buf + ETH_ALEN + 8, &group, sizeof(group));
ptr = (unsigned long) group;
os_memcpy(buf + ETH_ALEN + 8, &ptr, sizeof(ptr));
if (random_get_bytes(rkey, sizeof(rkey)) < 0)
return -1;