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EAP-AKA server: Use simpler AKA/Identity request determination

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There is no need to use eap_sim_db_identity_known() here since a new
AKA/Identity message is built only if the identity in the previous
response was not recognized. The first round is always used to request
AT_ANY_ID_REQ to meet the RFC 4187 recommendation on EAP method specific
identity request.

Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2012-09-01 19:19:45 +03:00
parent 9bf403b920
commit b4569a3bd8
1 changed files with 15 additions and 15 deletions
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30
src/eap_server/eap_server_aka.c
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@ -49,6 +49,7 @@ struct eap_aka_data {
u8 *network_name; u8 *network_name;
size_t network_name_len; size_t network_name_len;
u16 kdf; u16 kdf;
int identity_round;
}; };
@ -264,21 +265,8 @@ static struct wpabuf * eap_aka_build_identity(struct eap_sm *sm,
wpa_printf(MSG_DEBUG, "EAP-AKA: Generating Identity"); wpa_printf(MSG_DEBUG, "EAP-AKA: Generating Identity");
msg = eap_sim_msg_init(EAP_CODE_REQUEST, id, data->eap_method, msg = eap_sim_msg_init(EAP_CODE_REQUEST, id, data->eap_method,
EAP_AKA_SUBTYPE_IDENTITY); EAP_AKA_SUBTYPE_IDENTITY);
if (eap_sim_db_identity_known(sm->eap_sim_db_priv, sm->identity, data->identity_round++;
sm->identity_len)) { if (data->identity_round == 1) {
if (sm->identity_len > 0 &&
(sm->identity[0] == EAP_AKA_REAUTH_ID_PREFIX ||
sm->identity[0] == EAP_AKA_PRIME_REAUTH_ID_PREFIX)) {
/* Reauth id may have expired - try fullauth */
wpa_printf(MSG_DEBUG, " AT_FULLAUTH_ID_REQ");
eap_sim_msg_add(msg, EAP_SIM_AT_FULLAUTH_ID_REQ, 0,
NULL, 0);
} else {
wpa_printf(MSG_DEBUG, " AT_PERMANENT_ID_REQ");
eap_sim_msg_add(msg, EAP_SIM_AT_PERMANENT_ID_REQ, 0,
NULL, 0);
}
} else {
/* /*
* RFC 4187, Chap. 4.1.4 recommends that identity from EAP is * RFC 4187, Chap. 4.1.4 recommends that identity from EAP is
* ignored and the AKA/Identity is used to request the * ignored and the AKA/Identity is used to request the
@ -286,6 +274,18 @@ static struct wpabuf * eap_aka_build_identity(struct eap_sm *sm,
*/ */
wpa_printf(MSG_DEBUG, " AT_ANY_ID_REQ"); wpa_printf(MSG_DEBUG, " AT_ANY_ID_REQ");
eap_sim_msg_add(msg, EAP_SIM_AT_ANY_ID_REQ, 0, NULL, 0); eap_sim_msg_add(msg, EAP_SIM_AT_ANY_ID_REQ, 0, NULL, 0);
} else if (data->identity_round > 3) {
/* Cannot use more than three rounds of Identity messages */
return NULL;
} else if (sm->identity && sm->identity_len > 0 &&
(sm->identity[0] == EAP_AKA_REAUTH_ID_PREFIX ||
sm->identity[0] == EAP_AKA_PRIME_REAUTH_ID_PREFIX)) {
/* Reauth id may have expired - try fullauth */
wpa_printf(MSG_DEBUG, " AT_FULLAUTH_ID_REQ");
eap_sim_msg_add(msg, EAP_SIM_AT_FULLAUTH_ID_REQ, 0, NULL, 0);
} else {
wpa_printf(MSG_DEBUG, " AT_PERMANENT_ID_REQ");
eap_sim_msg_add(msg, EAP_SIM_AT_PERMANENT_ID_REQ, 0, NULL, 0);
} }
buf = eap_sim_msg_finish(msg, NULL, NULL, 0); buf = eap_sim_msg_finish(msg, NULL, NULL, 0);
if (eap_aka_add_id_msg(data, buf) < 0) { if (eap_aka_add_id_msg(data, buf) < 0) {