/*
- * EAP peer method: EAP-AKA (RFC 4187) and EAP-AKA' (draft-arkko-eap-aka-kdf)
- * Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi>
+ * EAP peer method: EAP-AKA (RFC 4187) and EAP-AKA' (RFC 5448)
+ * Copyright (c) 2004-2012, Jouni Malinen <j@w1.fi>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Alternatively, this software may be distributed under the terms of BSD
- * license.
- *
- * See README and COPYING for more details.
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
*/
#include "includes.h"
u8 *last_eap_identity;
size_t last_eap_identity_len;
enum {
- CONTINUE, RESULT_SUCCESS, RESULT_FAILURE, SUCCESS, FAILURE
+ CONTINUE, RESULT_SUCCESS, SUCCESS, FAILURE
} state;
struct wpabuf *id_msgs;
return "CONTINUE";
case RESULT_SUCCESS:
return "RESULT_SUCCESS";
- case RESULT_FAILURE:
- return "RESULT_FAILURE";
case SUCCESS:
return "SUCCESS";
case FAILURE:
{
struct eap_aka_data *data;
const char *phase1 = eap_get_config_phase1(sm);
+ struct eap_peer_config *config = eap_get_config(sm);
data = os_zalloc(sizeof(*data));
if (data == NULL)
data->result_ind = phase1 && os_strstr(phase1, "result_ind=1") != 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;
+ }
+ }
+
return data;
}
#endif /* EAP_AKA_PRIME */
+static void eap_aka_clear_keys(struct eap_aka_data *data, int reauth)
+{
+ if (!reauth) {
+ os_memset(data->mk, 0, EAP_SIM_MK_LEN);
+ os_memset(data->k_aut, 0, EAP_AKA_PRIME_K_AUT_LEN);
+ os_memset(data->k_encr, 0, EAP_SIM_K_ENCR_LEN);
+ os_memset(data->k_re, 0, EAP_AKA_PRIME_K_RE_LEN);
+ }
+ os_memset(data->msk, 0, EAP_SIM_KEYING_DATA_LEN);
+ os_memset(data->emsk, 0, EAP_EMSK_LEN);
+ os_memset(data->autn, 0, EAP_AKA_AUTN_LEN);
+ os_memset(data->auts, 0, EAP_AKA_AUTS_LEN);
+}
+
+
static void eap_aka_deinit(struct eap_sm *sm, void *priv)
{
struct eap_aka_data *data = priv;
os_free(data->last_eap_identity);
wpabuf_free(data->id_msgs);
os_free(data->network_name);
+ eap_aka_clear_keys(data, 0);
os_free(data);
}
}
+static int eap_aka_ext_sim_req(struct eap_sm *sm, struct eap_aka_data *data)
+{
+ char req[200], *pos, *end;
+
+ wpa_printf(MSG_DEBUG, "EAP-AKA: Use external USIM processing");
+ pos = req;
+ end = pos + sizeof(req);
+ pos += os_snprintf(pos, end - pos, "UMTS-AUTH");
+ pos += os_snprintf(pos, end - pos, ":");
+ pos += wpa_snprintf_hex(pos, end - pos, data->rand, EAP_AKA_RAND_LEN);
+ pos += os_snprintf(pos, end - pos, ":");
+ wpa_snprintf_hex(pos, end - pos, data->autn, EAP_AKA_AUTN_LEN);
+
+ eap_sm_request_sim(sm, req);
+ return 1;
+}
+
+
+static int eap_aka_ext_sim_result(struct eap_sm *sm, struct eap_aka_data *data,
+ struct eap_peer_config *conf)
+{
+ char *resp, *pos;
+
+ wpa_printf(MSG_DEBUG,
+ "EAP-AKA: Use result from external USIM processing");
+
+ resp = conf->external_sim_resp;
+ conf->external_sim_resp = NULL;
+
+ if (os_strncmp(resp, "UMTS-AUTS:", 10) == 0) {
+ pos = resp + 10;
+ if (hexstr2bin(pos, data->auts, EAP_AKA_AUTS_LEN) < 0)
+ goto invalid;
+ wpa_hexdump_key(MSG_DEBUG, "EAP-AKA: AUTS", data->auts,
+ EAP_AKA_AUTS_LEN);
+ os_free(resp);
+ return -2;
+ }
+
+ if (os_strncmp(resp, "UMTS-AUTH:", 10) != 0) {
+ wpa_printf(MSG_DEBUG, "EAP-AKA: Unrecognized external USIM processing response");
+ os_free(resp);
+ return -1;
+ }
+
+ pos = resp + 10;
+ wpa_hexdump(MSG_DEBUG, "EAP-AKA: RAND", data->rand, EAP_AKA_RAND_LEN);
+
+ if (hexstr2bin(pos, data->ik, EAP_AKA_IK_LEN) < 0)
+ goto invalid;
+ wpa_hexdump_key(MSG_DEBUG, "EAP-AKA: IK", data->ik, EAP_AKA_IK_LEN);
+ pos += EAP_AKA_IK_LEN * 2;
+ if (*pos != ':')
+ goto invalid;
+ pos++;
+
+ if (hexstr2bin(pos, data->ck, EAP_AKA_CK_LEN) < 0)
+ goto invalid;
+ wpa_hexdump_key(MSG_DEBUG, "EAP-AKA: CK", data->ck, EAP_AKA_CK_LEN);
+ pos += EAP_AKA_CK_LEN * 2;
+ if (*pos != ':')
+ goto invalid;
+ pos++;
+
+ data->res_len = os_strlen(pos) / 2;
+ if (data->res_len > EAP_AKA_RES_MAX_LEN) {
+ data->res_len = 0;
+ goto invalid;
+ }
+ if (hexstr2bin(pos, data->res, data->res_len) < 0)
+ goto invalid;
+ wpa_hexdump_key(MSG_DEBUG, "EAP-AKA: RES", data->res, data->res_len);
+
+ os_free(resp);
+ return 0;
+
+invalid:
+ wpa_printf(MSG_DEBUG, "EAP-AKA: Invalid external USIM processing UMTS-AUTH response");
+ os_free(resp);
+ return -1;
+}
+
+
static int eap_aka_umts_auth(struct eap_sm *sm, struct eap_aka_data *data)
{
struct eap_peer_config *conf;
conf = eap_get_config(sm);
if (conf == NULL)
return -1;
+
+ if (sm->external_sim) {
+ if (conf->external_sim_resp)
+ return eap_aka_ext_sim_result(sm, data, conf);
+ else
+ return eap_aka_ext_sim_req(sm, data);
+ }
+
if (conf->pcsc) {
return scard_umts_auth(sm->scard_ctx, data->rand,
data->autn, data->res, &data->res_len,
{
u8 autn[EAP_AKA_AUTN_LEN];
os_memset(autn, '1', EAP_AKA_AUTN_LEN);
- if (os_memcmp(autn, data->autn, EAP_AKA_AUTN_LEN) != 0) {
+ if (os_memcmp_const(autn, data->autn, EAP_AKA_AUTN_LEN) != 0) {
wpa_printf(MSG_WARNING, "EAP-AKA: AUTN did not match "
"with expected value");
return -1;
#else /* CONFIG_USIM_HARDCODED */
- wpa_printf(MSG_DEBUG, "EAP-AKA: No UMTS authentication algorith "
+ wpa_printf(MSG_DEBUG, "EAP-AKA: No UMTS authentication algorithm "
"enabled");
return -1;
#define CLEAR_REAUTH_ID 0x02
#define CLEAR_EAP_ID 0x04
-static void eap_aka_clear_identities(struct eap_aka_data *data, int id)
+static void eap_aka_clear_identities(struct eap_sm *sm,
+ struct eap_aka_data *data, int id)
{
- wpa_printf(MSG_DEBUG, "EAP-AKA: forgetting old%s%s%s",
- id & CLEAR_PSEUDONYM ? " pseudonym" : "",
- id & CLEAR_REAUTH_ID ? " reauth_id" : "",
- id & CLEAR_EAP_ID ? " eap_id" : "");
- if (id & CLEAR_PSEUDONYM) {
+ if ((id & CLEAR_PSEUDONYM) && data->pseudonym) {
+ wpa_printf(MSG_DEBUG, "EAP-AKA: 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) {
+ if ((id & CLEAR_REAUTH_ID) && data->reauth_id) {
+ wpa_printf(MSG_DEBUG, "EAP-AKA: forgetting old reauth_id");
os_free(data->reauth_id);
data->reauth_id = NULL;
data->reauth_id_len = 0;
}
- if (id & CLEAR_EAP_ID) {
+ if ((id & CLEAR_EAP_ID) && data->last_eap_identity) {
+ wpa_printf(MSG_DEBUG, "EAP-AKA: forgetting old eap_id");
os_free(data->last_eap_identity);
data->last_eap_identity = NULL;
data->last_eap_identity_len = 0;
}
-static int eap_aka_learn_ids(struct eap_aka_data *data,
+static int eap_aka_learn_ids(struct eap_sm *sm, struct eap_aka_data *data,
struct eap_sim_attrs *attr)
{
if (attr->next_pseudonym) {
+ const u8 *identity = NULL;
+ size_t identity_len = 0;
+ const u8 *realm = NULL;
+ size_t realm_len = 0;
+
+ wpa_hexdump_ascii(MSG_DEBUG,
+ "EAP-AKA: (encr) AT_NEXT_PSEUDONYM",
+ attr->next_pseudonym,
+ attr->next_pseudonym_len);
os_free(data->pseudonym);
- data->pseudonym = os_malloc(attr->next_pseudonym_len);
+ /* Look for the realm of the permanent identity */
+ identity = eap_get_config_identity(sm, &identity_len);
+ if (identity) {
+ for (realm = identity, realm_len = identity_len;
+ realm_len > 0; realm_len--, realm++) {
+ if (*realm == '@')
+ break;
+ }
+ }
+ data->pseudonym = os_malloc(attr->next_pseudonym_len +
+ realm_len);
if (data->pseudonym == NULL) {
wpa_printf(MSG_INFO, "EAP-AKA: (encr) No memory for "
"next pseudonym");
+ data->pseudonym_len = 0;
return -1;
}
os_memcpy(data->pseudonym, attr->next_pseudonym,
attr->next_pseudonym_len);
- data->pseudonym_len = attr->next_pseudonym_len;
- wpa_hexdump_ascii(MSG_DEBUG,
- "EAP-AKA: (encr) AT_NEXT_PSEUDONYM",
- data->pseudonym,
- data->pseudonym_len);
+ if (realm_len) {
+ os_memcpy(data->pseudonym + attr->next_pseudonym_len,
+ 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) {
if (data->reauth_id == NULL) {
wpa_printf(MSG_INFO, "EAP-AKA: (encr) No memory for "
"next reauth_id");
+ data->reauth_id_len = 0;
return -1;
}
os_memcpy(data->reauth_id, attr->next_reauth_id,
#endif /* EAP_AKA_PRIME */
sha1_vector(1, &addr, &len, hash);
- if (os_memcmp(hash, checkcode, hash_len) != 0) {
+ if (os_memcmp_const(hash, checkcode, hash_len) != 0) {
wpa_printf(MSG_DEBUG, "EAP-AKA: Mismatch in AT_CHECKCODE");
return -1;
}
data->num_id_req = 0;
data->num_notification = 0;
+ wpa_printf(MSG_DEBUG, "EAP-AKA: Send Client-Error (error code %d)",
+ err);
msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, data->eap_method,
EAP_AKA_SUBTYPE_CLIENT_ERROR);
eap_sim_msg_add(msg, EAP_SIM_AT_CLIENT_ERROR_CODE, err, NULL, 0);
- return eap_sim_msg_finish(msg, NULL, NULL, 0);
+ return eap_sim_msg_finish(msg, data->eap_method, NULL, NULL, 0);
}
"(id=%d)", id);
msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, data->eap_method,
EAP_AKA_SUBTYPE_AUTHENTICATION_REJECT);
- return eap_sim_msg_finish(msg, NULL, NULL, 0);
+ return eap_sim_msg_finish(msg, data->eap_method, NULL, NULL, 0);
}
wpa_printf(MSG_DEBUG, " AT_AUTS");
eap_sim_msg_add_full(msg, EAP_SIM_AT_AUTS, data->auts,
EAP_AKA_AUTS_LEN);
- return eap_sim_msg_finish(msg, NULL, NULL, 0);
+ return eap_sim_msg_finish(msg, data->eap_method, NULL, NULL, 0);
}
data->pseudonym) {
identity = data->pseudonym;
identity_len = data->pseudonym_len;
- eap_aka_clear_identities(data, CLEAR_REAUTH_ID);
+ eap_aka_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_aka_clear_identities(data, CLEAR_PSEUDONYM |
+ eap_aka_clear_identities(sm, data, CLEAR_PSEUDONYM |
CLEAR_REAUTH_ID);
}
}
if (id_req != NO_ID_REQ)
- eap_aka_clear_identities(data, CLEAR_EAP_ID);
+ eap_aka_clear_identities(sm, data, CLEAR_EAP_ID);
wpa_printf(MSG_DEBUG, "Generating EAP-AKA Identity (id=%d)", id);
msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, data->eap_method,
identity, identity_len);
}
- return eap_sim_msg_finish(msg, NULL, NULL, 0);
+ return eap_sim_msg_finish(msg, data->eap_method, NULL, NULL, 0);
}
}
wpa_printf(MSG_DEBUG, " AT_MAC");
eap_sim_msg_add_mac(msg, EAP_SIM_AT_MAC);
- return eap_sim_msg_finish(msg, data->k_aut, (u8 *) "", 0);
+ return eap_sim_msg_finish(msg, data->eap_method, data->k_aut, (u8 *) "",
+ 0);
}
}
wpa_printf(MSG_DEBUG, " AT_MAC");
eap_sim_msg_add_mac(msg, EAP_SIM_AT_MAC);
- return eap_sim_msg_finish(msg, data->k_aut, nonce_s,
+ return eap_sim_msg_finish(msg, data->eap_method, data->k_aut, nonce_s,
EAP_SIM_NONCE_S_LEN);
}
wpa_printf(MSG_DEBUG, " AT_MAC");
eap_sim_msg_add_mac(msg, EAP_SIM_AT_MAC);
}
- return eap_sim_msg_finish(msg, k_aut, (u8 *) "", 0);
+ return eap_sim_msg_finish(msg, data->eap_method, k_aut, (u8 *) "", 0);
}
EAP_AKA_SUBTYPE_CHALLENGE);
wpa_printf(MSG_DEBUG, " AT_KDF");
eap_sim_msg_add(msg, EAP_SIM_AT_KDF, kdf, NULL, 0);
- return eap_sim_msg_finish(msg, NULL, NULL, 0);
+ return eap_sim_msg_finish(msg, data->eap_method, NULL, NULL, 0);
}
wpa_printf(MSG_WARNING, "EAP-AKA: UMTS authentication "
"failed (AUTN seq# -> AUTS)");
return eap_aka_synchronization_failure(data, id);
+ } else if (res > 0) {
+ wpa_printf(MSG_DEBUG, "EAP-AKA: Wait for external USIM processing");
+ return NULL;
} else if (res) {
wpa_printf(MSG_WARNING, "EAP-AKA: UMTS authentication failed");
return eap_aka_client_error(data, id,
EAP_AKA_UNABLE_TO_PROCESS_PACKET);
}
- /* Old reauthentication and pseudonym identities must not be used
- * anymore. In other words, if no new identities are received, full
- * authentication will be used on next reauthentication. */
- eap_aka_clear_identities(data, CLEAR_PSEUDONYM | CLEAR_REAUTH_ID |
- CLEAR_EAP_ID);
+ /* Old reauthentication identity must not be used anymore. In
+ * other words, if no new identities are received, full
+ * authentication will be used on next reauthentication (using
+ * pseudonym identity or permanent identity). */
+ eap_aka_clear_identities(sm, data, CLEAR_REAUTH_ID | CLEAR_EAP_ID);
if (attr->encr_data) {
u8 *decrypted;
return eap_aka_client_error(
data, id, EAP_AKA_UNABLE_TO_PROCESS_PACKET);
}
- eap_aka_learn_ids(data, &eattr);
+ eap_aka_learn_ids(sm, data, &eattr);
os_free(decrypted);
}
if (data->result_ind && attr->result_ind)
data->use_result_ind = 1;
- if (data->state != FAILURE && data->state != RESULT_FAILURE) {
+ if (data->state != FAILURE) {
eap_aka_state(data, data->use_result_ind ?
RESULT_SUCCESS : SUCCESS);
}
data->nonce_s, data->mk,
data->msk, data->emsk);
}
- eap_aka_clear_identities(data, CLEAR_REAUTH_ID | CLEAR_EAP_ID);
- eap_aka_learn_ids(data, &eattr);
+ eap_aka_clear_identities(sm, data, CLEAR_REAUTH_ID | CLEAR_EAP_ID);
+ eap_aka_learn_ids(sm, data, &eattr);
if (data->result_ind && attr->result_ind)
data->use_result_ind = 1;
- if (data->state != FAILURE && data->state != RESULT_FAILURE) {
+ if (data->state != FAILURE) {
eap_aka_state(data, data->use_result_ind ?
RESULT_SUCCESS : SUCCESS);
}
if (data->counter > EAP_AKA_MAX_FAST_REAUTHS) {
wpa_printf(MSG_DEBUG, "EAP-AKA: Maximum number of "
"fast reauths performed - force fullauth");
- eap_aka_clear_identities(data, CLEAR_REAUTH_ID | CLEAR_EAP_ID);
+ eap_aka_clear_identities(sm, data,
+ CLEAR_REAUTH_ID | CLEAR_EAP_ID);
}
os_free(decrypted);
return eap_aka_response_reauth(data, id, 0, data->nonce_s);
pos = eap_hdr_validate(EAP_VENDOR_IETF, data->eap_method, reqData,
&len);
- if (pos == NULL || len < 1) {
+ if (pos == NULL || len < 3) {
ret->ignore = TRUE;
return NULL;
}
*/
ret->methodState = data->use_result_ind ?
METHOD_DONE : METHOD_MAY_CONT;
- } else if (data->state == RESULT_FAILURE)
- ret->methodState = METHOD_CONT;
- else if (data->state == RESULT_SUCCESS)
+ } else if (data->state == RESULT_SUCCESS)
ret->methodState = METHOD_CONT;
if (ret->methodState == METHOD_DONE) {
static void eap_aka_deinit_for_reauth(struct eap_sm *sm, void *priv)
{
struct eap_aka_data *data = priv;
- eap_aka_clear_identities(data, CLEAR_EAP_ID);
+ eap_aka_clear_identities(sm, data, CLEAR_EAP_ID);
data->prev_id = -1;
wpabuf_free(data->id_msgs);
data->id_msgs = NULL;
data->use_result_ind = 0;
data->kdf_negotiation = 0;
+ eap_aka_clear_keys(data, 1);
}
}
+static u8 * eap_aka_get_session_id(struct eap_sm *sm, void *priv, size_t *len)
+{
+ struct eap_aka_data *data = priv;
+ u8 *id;
+
+ if (data->state != SUCCESS)
+ return NULL;
+
+ *len = 1 + EAP_AKA_RAND_LEN + EAP_AKA_AUTN_LEN;
+ id = os_malloc(*len);
+ if (id == NULL)
+ return NULL;
+
+ id[0] = data->eap_method;
+ os_memcpy(id + 1, data->rand, EAP_AKA_RAND_LEN);
+ os_memcpy(id + 1 + EAP_AKA_RAND_LEN, data->autn, EAP_AKA_AUTN_LEN);
+ wpa_hexdump(MSG_DEBUG, "EAP-AKA: Derived Session-Id", id, *len);
+
+ return id;
+}
+
+
static u8 * eap_aka_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
{
struct eap_aka_data *data = priv;
eap->process = eap_aka_process;
eap->isKeyAvailable = eap_aka_isKeyAvailable;
eap->getKey = eap_aka_getKey;
+ eap->getSessionId = eap_aka_get_session_id;
eap->has_reauth_data = eap_aka_has_reauth_data;
eap->deinit_for_reauth = eap_aka_deinit_for_reauth;
eap->init_for_reauth = eap_aka_init_for_reauth;
eap->process = eap_aka_process;
eap->isKeyAvailable = eap_aka_isKeyAvailable;
eap->getKey = eap_aka_getKey;
+ eap->getSessionId = eap_aka_get_session_id;
eap->has_reauth_data = eap_aka_has_reauth_data;
eap->deinit_for_reauth = eap_aka_deinit_for_reauth;
eap->init_for_reauth = eap_aka_init_for_reauth;
projects / mech_eap.git / blobdiff