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EAP-SIM/AKA: Store pseudonym identity in configuration

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Use the anonymous_identity field to store EAP-SIM/AKA pseudonym identity
so that this can be maintained between EAP sessions (e.g., after
wpa_supplicant restart) even if fast re-authentication data was cleared.

Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2012-09-02 13:04:18 +03:00
parent 50a7755735
commit e026159a8e
10 changed files with 163 additions and 21 deletions
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31
src/eap_peer/eap_sim.c
View file

@ -1,6 +1,6 @@
/*
* EAP peer method: EAP-SIM (RFC 4186)
* Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi>
* Copyright (c) 2004-2012, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
@ -117,6 +117,15 @@ static void * eap_sim_init(struct eap_sm *sm)
NULL;
}
if (config && config->anonymous_identity) {
data->pseudonym = os_malloc(config->anonymous_identity_len);
if (data->pseudonym) {
os_memcpy(data->pseudonym, config->anonymous_identity,
config->anonymous_identity_len);
data->pseudonym_len = config->anonymous_identity_len;
}
}
eap_sim_state(data, CONTINUE);
return data;
@ -258,13 +267,15 @@ static int eap_sim_supported_ver(int version)
#define CLEAR_REAUTH_ID 0x02
#define CLEAR_EAP_ID 0x04
static void eap_sim_clear_identities(struct eap_sim_data *data, int id)
static void eap_sim_clear_identities(struct eap_sm *sm,
struct eap_sim_data *data, int id)
{
if ((id & CLEAR_PSEUDONYM) && data->pseudonym) {
wpa_printf(MSG_DEBUG, "EAP-SIM: forgetting old pseudonym");
os_free(data->pseudonym);
data->pseudonym = NULL;
data->pseudonym_len = 0;
eap_set_anon_id(sm, NULL, 0);
}
if ((id & CLEAR_REAUTH_ID) && data->reauth_id) {
wpa_printf(MSG_DEBUG, "EAP-SIM: forgetting old reauth_id");
@ -319,6 +330,7 @@ static int eap_sim_learn_ids(struct eap_sm *sm, struct eap_sim_data *data,
realm, realm_len);
}
data->pseudonym_len = attr->next_pseudonym_len + realm_len;
eap_set_anon_id(sm, data->pseudonym, data->pseudonym_len);
}
if (attr->next_reauth_id) {
@ -378,16 +390,16 @@ static struct wpabuf * eap_sim_response_start(struct eap_sm *sm,
data->pseudonym) {
identity = data->pseudonym;
identity_len = data->pseudonym_len;
eap_sim_clear_identities(data, CLEAR_REAUTH_ID);
eap_sim_clear_identities(sm, data, CLEAR_REAUTH_ID);
} else if (id_req != NO_ID_REQ) {
identity = eap_get_config_identity(sm, &identity_len);
if (identity) {
eap_sim_clear_identities(data, CLEAR_PSEUDONYM |
eap_sim_clear_identities(sm, data, CLEAR_PSEUDONYM |
CLEAR_REAUTH_ID);
}
}
if (id_req != NO_ID_REQ)
eap_sim_clear_identities(data, CLEAR_EAP_ID);
eap_sim_clear_identities(sm, data, CLEAR_EAP_ID);
wpa_printf(MSG_DEBUG, "Generating EAP-SIM Start (id=%d)", id);
msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id,
@ -670,7 +682,7 @@ static struct wpabuf * eap_sim_process_challenge(struct eap_sm *sm,
* other words, if no new reauth identity is received, full
* authentication will be used on next reauthentication (using
* pseudonym identity or permanent identity). */
eap_sim_clear_identities(data, CLEAR_REAUTH_ID | CLEAR_EAP_ID);
eap_sim_clear_identities(sm, data, CLEAR_REAUTH_ID | CLEAR_EAP_ID);
if (attr->encr_data) {
u8 *decrypted;
@ -878,7 +890,7 @@ static struct wpabuf * eap_sim_process_reauthentication(
data->reauth_id, data->reauth_id_len,
data->nonce_s, data->mk, data->msk,
data->emsk);
eap_sim_clear_identities(data, CLEAR_REAUTH_ID | CLEAR_EAP_ID);
eap_sim_clear_identities(sm, data, CLEAR_REAUTH_ID | CLEAR_EAP_ID);
eap_sim_learn_ids(sm, data, &eattr);
if (data->result_ind && attr->result_ind)
@ -894,7 +906,8 @@ static struct wpabuf * eap_sim_process_reauthentication(
if (data->counter > EAP_SIM_MAX_FAST_REAUTHS) {
wpa_printf(MSG_DEBUG, "EAP-SIM: Maximum number of "
"fast reauths performed - force fullauth");
eap_sim_clear_identities(data, CLEAR_REAUTH_ID | CLEAR_EAP_ID);
eap_sim_clear_identities(sm, data,
CLEAR_REAUTH_ID | CLEAR_EAP_ID);
}
os_free(decrypted);
return eap_sim_response_reauth(data, id, 0, data->nonce_s);
@ -1005,7 +1018,7 @@ static Boolean eap_sim_has_reauth_data(struct eap_sm *sm, void *priv)
static void eap_sim_deinit_for_reauth(struct eap_sm *sm, void *priv)
{
struct eap_sim_data *data = priv;
eap_sim_clear_identities(data, CLEAR_EAP_ID);
eap_sim_clear_identities(sm, data, CLEAR_EAP_ID);
data->use_result_ind = 0;
}