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DH: Clear memory explicitly on private key deinit

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Remove any DH private key from heap memory after use.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2015-01-05 18:03:40 +02:00
parent 77c45e2b35
commit a15a7fcf69
1 changed files with 4 additions and 4 deletions
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8
src/crypto/dh_groups.c
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@ -1198,14 +1198,14 @@ struct wpabuf * dh_init(const struct dh_group *dh, struct wpabuf **priv)
if (dh == NULL)
return NULL;
wpabuf_free(*priv);
wpabuf_clear_free(*priv);
*priv = wpabuf_alloc(dh->prime_len);
if (*priv == NULL)
return NULL;
if (random_get_bytes(wpabuf_put(*priv, dh->prime_len), dh->prime_len))
{
wpabuf_free(*priv);
wpabuf_clear_free(*priv);
*priv = NULL;
return NULL;
}
@ -1224,7 +1224,7 @@ struct wpabuf * dh_init(const struct dh_group *dh, struct wpabuf **priv)
wpabuf_head(*priv), wpabuf_len(*priv),
dh->prime, dh->prime_len, wpabuf_mhead(pv),
&pv_len) < 0) {
wpabuf_free(pv);
wpabuf_clear_free(pv);
wpa_printf(MSG_INFO, "DH: crypto_mod_exp failed");
return NULL;
}
@ -1260,7 +1260,7 @@ struct wpabuf * dh_derive_shared(const struct wpabuf *peer_public,
wpabuf_head(own_private), wpabuf_len(own_private),
dh->prime, dh->prime_len,
wpabuf_mhead(shared), &shared_len) < 0) {
wpabuf_free(shared);
wpabuf_clear_free(shared);
wpa_printf(MSG_INFO, "DH: crypto_mod_exp failed");
return NULL;
}