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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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4
src/crypto/dh_groups.c
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@ -16,6 +16,7 @@
#include "common.h"
#include "crypto.h"
#include "random.h"
#include "dh_groups.h"
@ -564,7 +565,8 @@ struct wpabuf * dh_init(const struct dh_group *dh, struct wpabuf **priv)
if (*priv == NULL)
return NULL;
if (os_get_random(wpabuf_put(*priv, dh->prime_len), dh->prime_len)) {
if (random_get_bytes(wpabuf_put(*priv, dh->prime_len), dh->prime_len))
{
wpabuf_free(*priv);
*priv = NULL;
return NULL;