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EAP-SIM server: Use Notification before EAP-Failure

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RFC 4186, chapter 6.3.3 mandates that EAP-Failure is used only after
Client-Error and Notification messages. Convert the direct jumps to the
FAILURE state with a notification round before sending out EAP-Failure.

Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2012-09-02 01:20:29 +03:00
parent 9343498989
commit c95c8b1859
1 changed files with 26 additions and 20 deletions
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46
src/eap_server/eap_server_sim.c
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@ -432,15 +432,12 @@ static void eap_sim_process_start(struct eap_sm *sm,
if (!attr->identity || attr->identity_len == 0) {
wpa_printf(MSG_DEBUG, "EAP-SIM: Peer did not provide any "
"identity");
eap_sim_state(data, FAILURE);
return;
goto failed;
}
new_identity = os_malloc(attr->identity_len);
if (new_identity == NULL) {
eap_sim_state(data, FAILURE);
return;
}
if (new_identity == NULL)
goto failed;
os_free(sm->identity);
sm->identity = new_identity;
os_memcpy(sm->identity, attr->identity, attr->identity_len);
@ -449,10 +446,8 @@ static void eap_sim_process_start(struct eap_sm *sm,
wpa_hexdump_ascii(MSG_DEBUG, "EAP-SIM: Identity",
sm->identity, sm->identity_len);
username = sim_get_username(sm->identity, sm->identity_len);
if (username == NULL) {
eap_sim_state(data, FAILURE);
return;
}
if (username == NULL)
goto failed;
if (username[0] == EAP_SIM_REAUTH_ID_PREFIX) {
wpa_printf(MSG_DEBUG, "EAP-SIM: Reauth username '%s'",
@ -499,8 +494,7 @@ static void eap_sim_process_start(struct eap_sm *sm,
wpa_printf(MSG_DEBUG, "EAP-SIM: Unrecognized username '%s'",
username);
os_free(username);
eap_sim_state(data, FAILURE);
return;
goto failed;
}
skip_id_update:
@ -509,15 +503,13 @@ skip_id_update:
if (attr->nonce_mt == NULL || attr->selected_version < 0) {
wpa_printf(MSG_DEBUG, "EAP-SIM: Start/Response missing "
"required attributes");
eap_sim_state(data, FAILURE);
return;
goto failed;
}
if (!eap_sim_supported_ver(data, attr->selected_version)) {
wpa_printf(MSG_DEBUG, "EAP-SIM: Peer selected unsupported "
"version %d", attr->selected_version);
eap_sim_state(data, FAILURE);
return;
goto failed;
}
data->counter = 0; /* reset re-auth counter since this is full auth */
@ -535,8 +527,7 @@ skip_id_update:
if (data->num_chal < 2) {
wpa_printf(MSG_INFO, "EAP-SIM: Failed to get GSM "
"authentication triplets for the peer");
eap_sim_state(data, FAILURE);
return;
goto failed;
}
identity_len = sm->identity_len;
@ -557,6 +548,11 @@ skip_id_update:
data->emsk);
eap_sim_state(data, CHALLENGE);
return;
failed:
data->notification = EAP_SIM_GENERAL_FAILURE_BEFORE_AUTH;
eap_sim_state(data, NOTIFICATION);
}
@ -571,7 +567,8 @@ static void eap_sim_process_challenge(struct eap_sm *sm,
data->num_chal * EAP_SIM_SRES_LEN)) {
wpa_printf(MSG_WARNING, "EAP-SIM: Challenge message "
"did not include valid AT_MAC");
eap_sim_state(data, FAILURE);
data->notification = EAP_SIM_GENERAL_FAILURE_BEFORE_AUTH;
eap_sim_state(data, NOTIFICATION);
return;
}
@ -670,7 +667,8 @@ static void eap_sim_process_reauth(struct eap_sm *sm,
return;
fail:
eap_sim_state(data, FAILURE);
data->notification = EAP_SIM_GENERAL_FAILURE_BEFORE_AUTH;
eap_sim_state(data, NOTIFICATION);
eap_sim_db_remove_reauth(sm->eap_sim_db_priv, data->reauth);
data->reauth = NULL;
os_free(decrypted);
@ -723,6 +721,14 @@ static void eap_sim_process(struct eap_sm *sm, void *priv,
if (eap_sim_parse_attr(pos, end, &attr, 0, 0)) {
wpa_printf(MSG_DEBUG, "EAP-SIM: Failed to parse attributes");
if (subtype != EAP_SIM_SUBTYPE_CLIENT_ERROR &&
(data->state == START || data->state == CHALLENGE ||
data->state == REAUTH)) {
data->notification =
EAP_SIM_GENERAL_FAILURE_BEFORE_AUTH;
eap_sim_state(data, NOTIFICATION);
return;
}
eap_sim_state(data, FAILURE);
return;
}