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Annotate places depending on strong random numbers

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This commit adds a new wrapper, random_get_bytes(), that is currently
defined to use os_get_random() as is. The places using
random_get_bytes() depend on the returned value being strong random
number, i.e., something that is infeasible for external device to
figure out. These values are used either directly as a key or as
nonces/challenges that are used as input for key derivation or
authentication.

The remaining direct uses of os_get_random() do not need as strong
random numbers to function correctly.
This commit is contained in:
Jouni Malinen 2010-11-24 01:05:20 +02:00
parent 1bdb7ab3af
commit 3642c4313a
38 changed files with 123 additions and 63 deletions
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3
src/eap_server/eap_server_sim.c
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@ -15,6 +15,7 @@
#include "includes.h"
#include "common.h"
#include "crypto/random.h"
#include "eap_server/eap_i.h"
#include "eap_common/eap_sim_common.h"
#include "eap_server/eap_sim_db.h"
@ -232,7 +233,7 @@ static struct wpabuf * eap_sim_build_reauth(struct eap_sm *sm,
wpa_printf(MSG_DEBUG, "EAP-SIM: Generating Re-authentication");
if (os_get_random(data->nonce_s, EAP_SIM_NONCE_S_LEN))
if (random_get_bytes(data->nonce_s, EAP_SIM_NONCE_S_LEN))
return NULL;
wpa_hexdump_key(MSG_MSGDUMP, "EAP-SIM: NONCE_S",
data->nonce_s, EAP_SIM_NONCE_S_LEN);