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@@ -1,1373 +0,0 @@
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-/*
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- * EAP peer method: EAP-AKA' (draft-arkko-eap-aka-kdf-10.txt)
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- * Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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- *
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- * Alternatively, this software may be distributed under the terms of BSD
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- * license.
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- *
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- * See README and COPYING for more details.
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- */
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-
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-#include "includes.h"
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-
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-#include "common.h"
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-#include "eap_peer/eap_i.h"
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-#include "pcsc_funcs.h"
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-#include "eap_common/eap_sim_common.h"
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-#include "sha1.h"
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-#include "sha256.h"
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-#include "crypto.h"
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-#include "eap_peer/eap_config.h"
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-#ifdef CONFIG_USIM_SIMULATOR
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-#include "hlr_auc_gw/milenage.h"
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-#endif /* CONFIG_USIM_SIMULATOR */
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-
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-
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-struct eap_aka_data {
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- u8 ik[EAP_AKA_IK_LEN], ck[EAP_AKA_CK_LEN], res[EAP_AKA_RES_MAX_LEN];
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- size_t res_len;
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- u8 nonce_s[EAP_SIM_NONCE_S_LEN];
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- u8 mk[EAP_SIM_MK_LEN];
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- u8 k_aut[EAP_AKA_PRIME_K_AUT_LEN];
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- u8 k_encr[EAP_SIM_K_ENCR_LEN];
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- u8 k_re[EAP_AKA_PRIME_K_RE_LEN];
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- u8 msk[EAP_SIM_KEYING_DATA_LEN];
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- u8 emsk[EAP_EMSK_LEN];
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- u8 rand[EAP_AKA_RAND_LEN], autn[EAP_AKA_AUTN_LEN];
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- u8 auts[EAP_AKA_AUTS_LEN];
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-
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- int num_id_req, num_notification;
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- u8 *pseudonym;
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- size_t pseudonym_len;
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- u8 *reauth_id;
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- size_t reauth_id_len;
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- int reauth;
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- unsigned int counter, counter_too_small;
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- u8 *last_eap_identity;
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- size_t last_eap_identity_len;
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- enum {
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- CONTINUE, RESULT_SUCCESS, RESULT_FAILURE, SUCCESS, FAILURE
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- } state;
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-
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- struct wpabuf *id_msgs;
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- int prev_id;
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- int result_ind, use_result_ind;
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- u8 eap_method;
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- u8 *network_name;
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- size_t network_name_len;
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- u16 kdf;
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-};
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-
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-
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-#ifndef CONFIG_NO_STDOUT_DEBUG
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-static const char * eap_aka_state_txt(int state)
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-{
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- switch (state) {
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- case CONTINUE:
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- return "CONTINUE";
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- case RESULT_SUCCESS:
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- return "RESULT_SUCCESS";
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- case RESULT_FAILURE:
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- return "RESULT_FAILURE";
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- case SUCCESS:
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- return "SUCCESS";
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- case FAILURE:
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- return "FAILURE";
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- default:
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- return "?";
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- }
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-}
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-#endif /* CONFIG_NO_STDOUT_DEBUG */
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-
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-
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-static void eap_aka_state(struct eap_aka_data *data, int state)
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-{
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- wpa_printf(MSG_DEBUG, "EAP-AKA%s: %s -> %s",
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- data->eap_method == EAP_TYPE_AKA_PRIME ? "'" : "",
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- eap_aka_state_txt(data->state),
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- eap_aka_state_txt(state));
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- data->state = state;
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-}
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-
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-
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-static void * eap_aka_init(struct eap_sm *sm)
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-{
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- struct eap_aka_data *data;
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- const char *phase1 = eap_get_config_phase1(sm);
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-
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- data = os_zalloc(sizeof(*data));
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- if (data == NULL)
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- return NULL;
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-
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- data->eap_method = EAP_TYPE_AKA;
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-
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- eap_aka_state(data, CONTINUE);
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- data->prev_id = -1;
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-
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- data->result_ind = phase1 && os_strstr(phase1, "result_ind=1") != NULL;
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-
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- return data;
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-}
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-
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-
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-static void * eap_aka_prime_init(struct eap_sm *sm)
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-{
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- struct eap_aka_data *data = eap_aka_init(sm);
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- if (data == NULL)
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- return NULL;
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- data->eap_method = EAP_TYPE_AKA_PRIME;
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- return data;
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-}
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-
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-
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-static void eap_aka_deinit(struct eap_sm *sm, void *priv)
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-{
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- struct eap_aka_data *data = priv;
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- if (data) {
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- os_free(data->pseudonym);
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- os_free(data->reauth_id);
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- os_free(data->last_eap_identity);
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- wpabuf_free(data->id_msgs);
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- os_free(data->network_name);
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- os_free(data);
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- }
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-}
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-
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-
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-static int eap_aka_umts_auth(struct eap_sm *sm, struct eap_aka_data *data)
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-{
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- struct eap_peer_config *conf;
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-
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- wpa_printf(MSG_DEBUG, "EAP-AKA: UMTS authentication algorithm");
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-
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- conf = eap_get_config(sm);
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- if (conf == NULL)
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- return -1;
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- if (conf->pcsc) {
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- return scard_umts_auth(sm->scard_ctx, data->rand,
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- data->autn, data->res, &data->res_len,
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- data->ik, data->ck, data->auts);
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- }
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-
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-#ifdef CONFIG_USIM_SIMULATOR
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- if (conf->password) {
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- u8 opc[16], k[16], sqn[6];
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- const char *pos;
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- wpa_printf(MSG_DEBUG, "EAP-AKA: Use internal Milenage "
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- "implementation for UMTS authentication");
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- if (conf->password_len < 78) {
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- wpa_printf(MSG_DEBUG, "EAP-AKA: invalid Milenage "
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- "password");
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- return -1;
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- }
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- pos = (const char *) conf->password;
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- if (hexstr2bin(pos, k, 16))
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- return -1;
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- pos += 32;
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- if (*pos != ':')
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- return -1;
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- pos++;
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-
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- if (hexstr2bin(pos, opc, 16))
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- return -1;
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- pos += 32;
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- if (*pos != ':')
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- return -1;
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- pos++;
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-
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- if (hexstr2bin(pos, sqn, 6))
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- return -1;
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-
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- return milenage_check(opc, k, sqn, data->rand, data->autn,
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- data->ik, data->ck,
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- data->res, &data->res_len, data->auts);
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- }
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-#endif /* CONFIG_USIM_SIMULATOR */
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-
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-#ifdef CONFIG_USIM_HARDCODED
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- wpa_printf(MSG_DEBUG, "EAP-AKA: Use hardcoded Kc and SRES values for "
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- "testing");
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-
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- /* These hardcoded Kc and SRES values are used for testing.
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- * Could consider making them configurable. */
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- os_memset(data->res, '2', EAP_AKA_RES_MAX_LEN);
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- data->res_len = EAP_AKA_RES_MAX_LEN;
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- os_memset(data->ik, '3', EAP_AKA_IK_LEN);
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- os_memset(data->ck, '4', EAP_AKA_CK_LEN);
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- {
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- u8 autn[EAP_AKA_AUTN_LEN];
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- os_memset(autn, '1', EAP_AKA_AUTN_LEN);
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- if (os_memcmp(autn, data->autn, EAP_AKA_AUTN_LEN) != 0) {
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- wpa_printf(MSG_WARNING, "EAP-AKA: AUTN did not match "
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- "with expected value");
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- return -1;
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- }
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- }
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-#if 0
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- {
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- static int test_resync = 1;
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- if (test_resync) {
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- /* Test Resynchronization */
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- test_resync = 0;
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- return -2;
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- }
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- }
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-#endif
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- return 0;
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-
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-#else /* CONFIG_USIM_HARDCODED */
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-
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- wpa_printf(MSG_DEBUG, "EAP-AKA: No UMTS authentication algorith "
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- "enabled");
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- return -1;
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-
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-#endif /* CONFIG_USIM_HARDCODED */
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-}
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-
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-
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-#define CLEAR_PSEUDONYM 0x01
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-#define CLEAR_REAUTH_ID 0x02
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-#define CLEAR_EAP_ID 0x04
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-
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-static void eap_aka_clear_identities(struct eap_aka_data *data, int id)
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-{
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- wpa_printf(MSG_DEBUG, "EAP-AKA: forgetting old%s%s%s",
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- id & CLEAR_PSEUDONYM ? " pseudonym" : "",
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- id & CLEAR_REAUTH_ID ? " reauth_id" : "",
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- id & CLEAR_EAP_ID ? " eap_id" : "");
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- if (id & CLEAR_PSEUDONYM) {
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- os_free(data->pseudonym);
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- data->pseudonym = NULL;
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- data->pseudonym_len = 0;
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- }
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- if (id & CLEAR_REAUTH_ID) {
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- os_free(data->reauth_id);
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- data->reauth_id = NULL;
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- data->reauth_id_len = 0;
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- }
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- if (id & CLEAR_EAP_ID) {
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- os_free(data->last_eap_identity);
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- data->last_eap_identity = NULL;
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- data->last_eap_identity_len = 0;
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- }
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-}
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-
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-
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-static int eap_aka_learn_ids(struct eap_aka_data *data,
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- struct eap_sim_attrs *attr)
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-{
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- if (attr->next_pseudonym) {
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- os_free(data->pseudonym);
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- data->pseudonym = os_malloc(attr->next_pseudonym_len);
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- if (data->pseudonym == NULL) {
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- wpa_printf(MSG_INFO, "EAP-AKA: (encr) No memory for "
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- "next pseudonym");
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- return -1;
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- }
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- os_memcpy(data->pseudonym, attr->next_pseudonym,
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- attr->next_pseudonym_len);
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- data->pseudonym_len = attr->next_pseudonym_len;
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- wpa_hexdump_ascii(MSG_DEBUG,
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- "EAP-AKA: (encr) AT_NEXT_PSEUDONYM",
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- data->pseudonym,
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- data->pseudonym_len);
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- }
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-
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- if (attr->next_reauth_id) {
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- os_free(data->reauth_id);
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- data->reauth_id = os_malloc(attr->next_reauth_id_len);
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- if (data->reauth_id == NULL) {
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- wpa_printf(MSG_INFO, "EAP-AKA: (encr) No memory for "
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- "next reauth_id");
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- return -1;
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- }
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- os_memcpy(data->reauth_id, attr->next_reauth_id,
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- attr->next_reauth_id_len);
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- data->reauth_id_len = attr->next_reauth_id_len;
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- wpa_hexdump_ascii(MSG_DEBUG,
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- "EAP-AKA: (encr) AT_NEXT_REAUTH_ID",
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- data->reauth_id,
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- data->reauth_id_len);
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- }
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-
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- return 0;
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-}
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-
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-
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-static int eap_aka_add_id_msg(struct eap_aka_data *data,
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- const struct wpabuf *msg)
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-{
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- if (msg == NULL)
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- return -1;
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-
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- if (data->id_msgs == NULL) {
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- data->id_msgs = wpabuf_dup(msg);
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- return data->id_msgs == NULL ? -1 : 0;
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- }
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-
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- if (wpabuf_resize(&data->id_msgs, wpabuf_len(msg)) < 0)
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- return -1;
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- wpabuf_put_buf(data->id_msgs, msg);
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-
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- return 0;
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-}
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-
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-
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-static void eap_aka_add_checkcode(struct eap_aka_data *data,
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- struct eap_sim_msg *msg)
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-{
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- const u8 *addr;
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- size_t len;
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- u8 hash[SHA256_MAC_LEN];
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-
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- wpa_printf(MSG_DEBUG, " AT_CHECKCODE");
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-
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- if (data->id_msgs == NULL) {
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- /*
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- * No EAP-AKA/Identity packets were exchanged - send empty
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- * checkcode.
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- */
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- eap_sim_msg_add(msg, EAP_SIM_AT_CHECKCODE, 0, NULL, 0);
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- return;
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- }
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-
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- /* Checkcode is SHA1/SHA256 hash over all EAP-AKA/Identity packets. */
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- addr = wpabuf_head(data->id_msgs);
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- len = wpabuf_len(data->id_msgs);
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- wpa_hexdump(MSG_MSGDUMP, "EAP-AKA: AT_CHECKCODE data", addr, len);
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- if (data->eap_method == EAP_TYPE_AKA_PRIME)
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- sha256_vector(1, &addr, &len, hash);
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- else
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- sha1_vector(1, &addr, &len, hash);
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-
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- eap_sim_msg_add(msg, EAP_SIM_AT_CHECKCODE, 0, hash,
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- data->eap_method == EAP_TYPE_AKA_PRIME ?
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- EAP_AKA_PRIME_CHECKCODE_LEN : EAP_AKA_CHECKCODE_LEN);
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-}
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-
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-
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-static int eap_aka_verify_checkcode(struct eap_aka_data *data,
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- const u8 *checkcode, size_t checkcode_len)
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-{
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- const u8 *addr;
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- size_t len;
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- u8 hash[SHA256_MAC_LEN];
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- size_t hash_len;
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-
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- if (checkcode == NULL)
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- return -1;
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-
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- if (data->id_msgs == NULL) {
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- if (checkcode_len != 0) {
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- wpa_printf(MSG_DEBUG, "EAP-AKA: Checkcode from server "
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- "indicates that AKA/Identity messages were "
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- "used, but they were not");
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- return -1;
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- }
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- return 0;
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- }
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-
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- hash_len = data->eap_method == EAP_TYPE_AKA_PRIME ?
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- EAP_AKA_PRIME_CHECKCODE_LEN : EAP_AKA_CHECKCODE_LEN;
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-
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- if (checkcode_len != hash_len) {
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- wpa_printf(MSG_DEBUG, "EAP-AKA: Checkcode from server "
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- "indicates that AKA/Identity message were not "
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- "used, but they were");
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- return -1;
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- }
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-
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- /* Checkcode is SHA1/SHA256 hash over all EAP-AKA/Identity packets. */
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- addr = wpabuf_head(data->id_msgs);
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- len = wpabuf_len(data->id_msgs);
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- if (data->eap_method == EAP_TYPE_AKA_PRIME)
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- sha256_vector(1, &addr, &len, hash);
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- else
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- sha1_vector(1, &addr, &len, hash);
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-
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- if (os_memcmp(hash, checkcode, hash_len) != 0) {
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- wpa_printf(MSG_DEBUG, "EAP-AKA: Mismatch in AT_CHECKCODE");
|
|
|
- return -1;
|
|
|
- }
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static struct wpabuf * eap_aka_client_error(struct eap_aka_data *data, u8 id,
|
|
|
- int err)
|
|
|
-{
|
|
|
- struct eap_sim_msg *msg;
|
|
|
-
|
|
|
- eap_aka_state(data, FAILURE);
|
|
|
- data->num_id_req = 0;
|
|
|
- data->num_notification = 0;
|
|
|
-
|
|
|
- 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);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static struct wpabuf * eap_aka_authentication_reject(struct eap_aka_data *data,
|
|
|
- u8 id)
|
|
|
-{
|
|
|
- struct eap_sim_msg *msg;
|
|
|
-
|
|
|
- eap_aka_state(data, FAILURE);
|
|
|
- data->num_id_req = 0;
|
|
|
- data->num_notification = 0;
|
|
|
-
|
|
|
- wpa_printf(MSG_DEBUG, "Generating EAP-AKA Authentication-Reject "
|
|
|
- "(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);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static struct wpabuf * eap_aka_synchronization_failure(
|
|
|
- struct eap_aka_data *data, u8 id)
|
|
|
-{
|
|
|
- struct eap_sim_msg *msg;
|
|
|
-
|
|
|
- data->num_id_req = 0;
|
|
|
- data->num_notification = 0;
|
|
|
-
|
|
|
- wpa_printf(MSG_DEBUG, "Generating EAP-AKA Synchronization-Failure "
|
|
|
- "(id=%d)", id);
|
|
|
- msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, data->eap_method,
|
|
|
- EAP_AKA_SUBTYPE_SYNCHRONIZATION_FAILURE);
|
|
|
- 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);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static struct wpabuf * eap_aka_response_identity(struct eap_sm *sm,
|
|
|
- struct eap_aka_data *data,
|
|
|
- u8 id,
|
|
|
- enum eap_sim_id_req id_req)
|
|
|
-{
|
|
|
- const u8 *identity = NULL;
|
|
|
- size_t identity_len = 0;
|
|
|
- struct eap_sim_msg *msg;
|
|
|
-
|
|
|
- data->reauth = 0;
|
|
|
- if (id_req == ANY_ID && data->reauth_id) {
|
|
|
- identity = data->reauth_id;
|
|
|
- identity_len = data->reauth_id_len;
|
|
|
- data->reauth = 1;
|
|
|
- } else if ((id_req == ANY_ID || id_req == FULLAUTH_ID) &&
|
|
|
- data->pseudonym) {
|
|
|
- identity = data->pseudonym;
|
|
|
- identity_len = data->pseudonym_len;
|
|
|
- eap_aka_clear_identities(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 |
|
|
|
- CLEAR_REAUTH_ID);
|
|
|
- }
|
|
|
- }
|
|
|
- if (id_req != NO_ID_REQ)
|
|
|
- eap_aka_clear_identities(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,
|
|
|
- EAP_AKA_SUBTYPE_IDENTITY);
|
|
|
-
|
|
|
- if (identity) {
|
|
|
- wpa_hexdump_ascii(MSG_DEBUG, " AT_IDENTITY",
|
|
|
- identity, identity_len);
|
|
|
- eap_sim_msg_add(msg, EAP_SIM_AT_IDENTITY, identity_len,
|
|
|
- identity, identity_len);
|
|
|
- }
|
|
|
-
|
|
|
- return eap_sim_msg_finish(msg, NULL, NULL, 0);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static struct wpabuf * eap_aka_response_challenge(struct eap_aka_data *data,
|
|
|
- u8 id)
|
|
|
-{
|
|
|
- struct eap_sim_msg *msg;
|
|
|
-
|
|
|
- wpa_printf(MSG_DEBUG, "Generating EAP-AKA Challenge (id=%d)", id);
|
|
|
- msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, data->eap_method,
|
|
|
- EAP_AKA_SUBTYPE_CHALLENGE);
|
|
|
- wpa_printf(MSG_DEBUG, " AT_RES");
|
|
|
- eap_sim_msg_add(msg, EAP_SIM_AT_RES, data->res_len * 8,
|
|
|
- data->res, data->res_len);
|
|
|
- eap_aka_add_checkcode(data, msg);
|
|
|
- if (data->use_result_ind) {
|
|
|
- wpa_printf(MSG_DEBUG, " AT_RESULT_IND");
|
|
|
- eap_sim_msg_add(msg, EAP_SIM_AT_RESULT_IND, 0, 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);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static struct wpabuf * eap_aka_response_reauth(struct eap_aka_data *data,
|
|
|
- u8 id, int counter_too_small,
|
|
|
- const u8 *nonce_s)
|
|
|
-{
|
|
|
- struct eap_sim_msg *msg;
|
|
|
- unsigned int counter;
|
|
|
-
|
|
|
- wpa_printf(MSG_DEBUG, "Generating EAP-AKA Reauthentication (id=%d)",
|
|
|
- id);
|
|
|
- msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, data->eap_method,
|
|
|
- EAP_AKA_SUBTYPE_REAUTHENTICATION);
|
|
|
- wpa_printf(MSG_DEBUG, " AT_IV");
|
|
|
- wpa_printf(MSG_DEBUG, " AT_ENCR_DATA");
|
|
|
- eap_sim_msg_add_encr_start(msg, EAP_SIM_AT_IV, EAP_SIM_AT_ENCR_DATA);
|
|
|
-
|
|
|
- if (counter_too_small) {
|
|
|
- wpa_printf(MSG_DEBUG, " *AT_COUNTER_TOO_SMALL");
|
|
|
- eap_sim_msg_add(msg, EAP_SIM_AT_COUNTER_TOO_SMALL, 0, NULL, 0);
|
|
|
- counter = data->counter_too_small;
|
|
|
- } else
|
|
|
- counter = data->counter;
|
|
|
-
|
|
|
- wpa_printf(MSG_DEBUG, " *AT_COUNTER %d", counter);
|
|
|
- eap_sim_msg_add(msg, EAP_SIM_AT_COUNTER, counter, NULL, 0);
|
|
|
-
|
|
|
- if (eap_sim_msg_add_encr_end(msg, data->k_encr, EAP_SIM_AT_PADDING)) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA: Failed to encrypt "
|
|
|
- "AT_ENCR_DATA");
|
|
|
- eap_sim_msg_free(msg);
|
|
|
- return NULL;
|
|
|
- }
|
|
|
- eap_aka_add_checkcode(data, msg);
|
|
|
- if (data->use_result_ind) {
|
|
|
- wpa_printf(MSG_DEBUG, " AT_RESULT_IND");
|
|
|
- eap_sim_msg_add(msg, EAP_SIM_AT_RESULT_IND, 0, 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, nonce_s,
|
|
|
- EAP_SIM_NONCE_S_LEN);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static struct wpabuf * eap_aka_response_notification(struct eap_aka_data *data,
|
|
|
- u8 id, u16 notification)
|
|
|
-{
|
|
|
- struct eap_sim_msg *msg;
|
|
|
- u8 *k_aut = (notification & 0x4000) == 0 ? data->k_aut : NULL;
|
|
|
-
|
|
|
- wpa_printf(MSG_DEBUG, "Generating EAP-AKA Notification (id=%d)", id);
|
|
|
- msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, data->eap_method,
|
|
|
- EAP_AKA_SUBTYPE_NOTIFICATION);
|
|
|
- if (k_aut && data->reauth) {
|
|
|
- wpa_printf(MSG_DEBUG, " AT_IV");
|
|
|
- wpa_printf(MSG_DEBUG, " AT_ENCR_DATA");
|
|
|
- eap_sim_msg_add_encr_start(msg, EAP_SIM_AT_IV,
|
|
|
- EAP_SIM_AT_ENCR_DATA);
|
|
|
- wpa_printf(MSG_DEBUG, " *AT_COUNTER %d", data->counter);
|
|
|
- eap_sim_msg_add(msg, EAP_SIM_AT_COUNTER, data->counter,
|
|
|
- NULL, 0);
|
|
|
- if (eap_sim_msg_add_encr_end(msg, data->k_encr,
|
|
|
- EAP_SIM_AT_PADDING)) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA: Failed to encrypt "
|
|
|
- "AT_ENCR_DATA");
|
|
|
- eap_sim_msg_free(msg);
|
|
|
- return NULL;
|
|
|
- }
|
|
|
- }
|
|
|
- if (k_aut) {
|
|
|
- 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);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static struct wpabuf * eap_aka_process_identity(struct eap_sm *sm,
|
|
|
- struct eap_aka_data *data,
|
|
|
- u8 id,
|
|
|
- const struct wpabuf *reqData,
|
|
|
- struct eap_sim_attrs *attr)
|
|
|
-{
|
|
|
- int id_error;
|
|
|
- struct wpabuf *buf;
|
|
|
-
|
|
|
- wpa_printf(MSG_DEBUG, "EAP-AKA: subtype Identity");
|
|
|
-
|
|
|
- id_error = 0;
|
|
|
- switch (attr->id_req) {
|
|
|
- case NO_ID_REQ:
|
|
|
- break;
|
|
|
- case ANY_ID:
|
|
|
- if (data->num_id_req > 0)
|
|
|
- id_error++;
|
|
|
- data->num_id_req++;
|
|
|
- break;
|
|
|
- case FULLAUTH_ID:
|
|
|
- if (data->num_id_req > 1)
|
|
|
- id_error++;
|
|
|
- data->num_id_req++;
|
|
|
- break;
|
|
|
- case PERMANENT_ID:
|
|
|
- if (data->num_id_req > 2)
|
|
|
- id_error++;
|
|
|
- data->num_id_req++;
|
|
|
- break;
|
|
|
- }
|
|
|
- if (id_error) {
|
|
|
- wpa_printf(MSG_INFO, "EAP-AKA: Too many ID requests "
|
|
|
- "used within one authentication");
|
|
|
- return eap_aka_client_error(data, id,
|
|
|
- EAP_AKA_UNABLE_TO_PROCESS_PACKET);
|
|
|
- }
|
|
|
-
|
|
|
- buf = eap_aka_response_identity(sm, data, id, attr->id_req);
|
|
|
-
|
|
|
- if (data->prev_id != id) {
|
|
|
- eap_aka_add_id_msg(data, reqData);
|
|
|
- eap_aka_add_id_msg(data, buf);
|
|
|
- data->prev_id = id;
|
|
|
- }
|
|
|
-
|
|
|
- return buf;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int eap_aka_verify_mac(struct eap_aka_data *data,
|
|
|
- const struct wpabuf *req,
|
|
|
- const u8 *mac, const u8 *extra,
|
|
|
- size_t extra_len)
|
|
|
-{
|
|
|
- if (data->eap_method == EAP_TYPE_AKA_PRIME)
|
|
|
- return eap_sim_verify_mac_sha256(data->k_aut, req, mac, extra,
|
|
|
- extra_len);
|
|
|
- return eap_sim_verify_mac(data->k_aut, req, mac, extra, extra_len);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-#ifdef EAP_AKA_PRIME
|
|
|
-static struct wpabuf * eap_aka_prime_kdf_select(struct eap_aka_data *data,
|
|
|
- u8 id, u16 kdf)
|
|
|
-{
|
|
|
- struct eap_sim_msg *msg;
|
|
|
-
|
|
|
- data->kdf = kdf;
|
|
|
- wpa_printf(MSG_DEBUG, "Generating EAP-AKA Challenge (id=%d) (KDF "
|
|
|
- "select)", id);
|
|
|
- msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, data->eap_method,
|
|
|
- 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);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static struct wpabuf * eap_aka_prime_kdf_neg(struct eap_aka_data *data,
|
|
|
- u8 id, struct eap_sim_attrs *attr)
|
|
|
-{
|
|
|
- size_t i;
|
|
|
-
|
|
|
- for (i = 0; i < attr->kdf_count; i++) {
|
|
|
- if (attr->kdf[i] == EAP_AKA_PRIME_KDF)
|
|
|
- return eap_aka_prime_kdf_select(data, id,
|
|
|
- EAP_AKA_PRIME_KDF);
|
|
|
- }
|
|
|
-
|
|
|
- /* No matching KDF found - fail authentication as if AUTN had been
|
|
|
- * incorrect */
|
|
|
- return eap_aka_authentication_reject(data, id);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int eap_aka_prime_kdf_valid(struct eap_aka_data *data,
|
|
|
- struct eap_sim_attrs *attr)
|
|
|
-{
|
|
|
- size_t i, j;
|
|
|
-
|
|
|
- if (attr->kdf_count == 0)
|
|
|
- return 0;
|
|
|
-
|
|
|
- /* The only allowed (and required) duplication of a KDF is the addition
|
|
|
- * of the selected KDF into the beginning of the list. */
|
|
|
-
|
|
|
- if (data->kdf) {
|
|
|
- if (attr->kdf[0] != data->kdf) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA': The server did not "
|
|
|
- "accept the selected KDF");
|
|
|
- return 0;
|
|
|
- }
|
|
|
-
|
|
|
- for (i = 1; i < attr->kdf_count; i++) {
|
|
|
- if (attr->kdf[i] == data->kdf)
|
|
|
- break;
|
|
|
- }
|
|
|
- if (i == attr->kdf_count &&
|
|
|
- attr->kdf_count < EAP_AKA_PRIME_KDF_MAX) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA': The server did not "
|
|
|
- "duplicate the selected KDF");
|
|
|
- return 0;
|
|
|
- }
|
|
|
-
|
|
|
- /* TODO: should check that the list is identical to the one
|
|
|
- * used in the previous Challenge message apart from the added
|
|
|
- * entry in the beginning. */
|
|
|
- }
|
|
|
-
|
|
|
- for (i = data->kdf ? 1 : 0; i < attr->kdf_count; i++) {
|
|
|
- for (j = i + 1; j < attr->kdf_count; j++) {
|
|
|
- if (attr->kdf[i] == attr->kdf[j]) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA': The server "
|
|
|
- "included a duplicated KDF");
|
|
|
- return 0;
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- return 1;
|
|
|
-}
|
|
|
-#endif /* EAP_AKA_PRIME */
|
|
|
-
|
|
|
-
|
|
|
-static struct wpabuf * eap_aka_process_challenge(struct eap_sm *sm,
|
|
|
- struct eap_aka_data *data,
|
|
|
- u8 id,
|
|
|
- const struct wpabuf *reqData,
|
|
|
- struct eap_sim_attrs *attr)
|
|
|
-{
|
|
|
- const u8 *identity;
|
|
|
- size_t identity_len;
|
|
|
- int res;
|
|
|
- struct eap_sim_attrs eattr;
|
|
|
-
|
|
|
- wpa_printf(MSG_DEBUG, "EAP-AKA: subtype Challenge");
|
|
|
-
|
|
|
- if (attr->checkcode &&
|
|
|
- eap_aka_verify_checkcode(data, attr->checkcode,
|
|
|
- attr->checkcode_len)) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA: Invalid AT_CHECKCODE in the "
|
|
|
- "message");
|
|
|
- return eap_aka_client_error(data, id,
|
|
|
- EAP_AKA_UNABLE_TO_PROCESS_PACKET);
|
|
|
- }
|
|
|
-
|
|
|
-#ifdef EAP_AKA_PRIME
|
|
|
- if (data->eap_method == EAP_TYPE_AKA_PRIME) {
|
|
|
- if (!attr->kdf_input || attr->kdf_input_len == 0) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA': Challenge message "
|
|
|
- "did not include non-empty AT_KDF_INPUT");
|
|
|
- /* Fail authentication as if AUTN had been incorrect */
|
|
|
- return eap_aka_authentication_reject(data, id);
|
|
|
- }
|
|
|
- os_free(data->network_name);
|
|
|
- data->network_name = os_malloc(attr->kdf_input_len);
|
|
|
- if (data->network_name == NULL) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA': No memory for "
|
|
|
- "storing Network Name");
|
|
|
- return eap_aka_authentication_reject(data, id);
|
|
|
- }
|
|
|
- os_memcpy(data->network_name, attr->kdf_input,
|
|
|
- attr->kdf_input_len);
|
|
|
- data->network_name_len = attr->kdf_input_len;
|
|
|
- wpa_hexdump_ascii(MSG_DEBUG, "EAP-AKA': Network Name "
|
|
|
- "(AT_KDF_INPUT)",
|
|
|
- data->network_name, data->network_name_len);
|
|
|
- /* TODO: check Network Name per 3GPP.33.402 */
|
|
|
-
|
|
|
- if (!eap_aka_prime_kdf_valid(data, attr))
|
|
|
- return eap_aka_authentication_reject(data, id);
|
|
|
-
|
|
|
- if (attr->kdf[0] != EAP_AKA_PRIME_KDF)
|
|
|
- return eap_aka_prime_kdf_neg(data, id, attr);
|
|
|
-
|
|
|
- data->kdf = EAP_AKA_PRIME_KDF;
|
|
|
- wpa_printf(MSG_DEBUG, "EAP-AKA': KDF %d selected", data->kdf);
|
|
|
- }
|
|
|
-
|
|
|
- if (data->eap_method == EAP_TYPE_AKA && attr->bidding) {
|
|
|
- u16 flags = WPA_GET_BE16(attr->bidding);
|
|
|
- if ((flags & EAP_AKA_BIDDING_FLAG_D) &&
|
|
|
- eap_allowed_method(sm, EAP_VENDOR_IETF,
|
|
|
- EAP_TYPE_AKA_PRIME)) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA: Bidding down from "
|
|
|
- "AKA' to AKA detected");
|
|
|
- /* Fail authentication as if AUTN had been incorrect */
|
|
|
- return eap_aka_authentication_reject(data, id);
|
|
|
- }
|
|
|
- }
|
|
|
-#endif /* EAP_AKA_PRIME */
|
|
|
-
|
|
|
- data->reauth = 0;
|
|
|
- if (!attr->mac || !attr->rand || !attr->autn) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA: Challenge message "
|
|
|
- "did not include%s%s%s",
|
|
|
- !attr->mac ? " AT_MAC" : "",
|
|
|
- !attr->rand ? " AT_RAND" : "",
|
|
|
- !attr->autn ? " AT_AUTN" : "");
|
|
|
- return eap_aka_client_error(data, id,
|
|
|
- EAP_AKA_UNABLE_TO_PROCESS_PACKET);
|
|
|
- }
|
|
|
- os_memcpy(data->rand, attr->rand, EAP_AKA_RAND_LEN);
|
|
|
- os_memcpy(data->autn, attr->autn, EAP_AKA_AUTN_LEN);
|
|
|
-
|
|
|
- res = eap_aka_umts_auth(sm, data);
|
|
|
- if (res == -1) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA: UMTS authentication "
|
|
|
- "failed (AUTN)");
|
|
|
- return eap_aka_authentication_reject(data, id);
|
|
|
- } else if (res == -2) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA: UMTS authentication "
|
|
|
- "failed (AUTN seq# -> AUTS)");
|
|
|
- return eap_aka_synchronization_failure(data, id);
|
|
|
- } 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);
|
|
|
- }
|
|
|
-#ifdef EAP_AKA_PRIME
|
|
|
- if (data->eap_method == EAP_TYPE_AKA_PRIME) {
|
|
|
- /* Note: AUTN = (SQN ^ AK) || AMF || MAC which gives us the
|
|
|
- * needed 6-octet SQN ^AK for CK',IK' derivation */
|
|
|
- eap_aka_prime_derive_ck_ik_prime(data->ck, data->ik,
|
|
|
- data->autn,
|
|
|
- data->network_name,
|
|
|
- data->network_name_len);
|
|
|
- }
|
|
|
-#endif /* EAP_AKA_PRIME */
|
|
|
- if (data->last_eap_identity) {
|
|
|
- identity = data->last_eap_identity;
|
|
|
- identity_len = data->last_eap_identity_len;
|
|
|
- } else if (data->pseudonym) {
|
|
|
- identity = data->pseudonym;
|
|
|
- identity_len = data->pseudonym_len;
|
|
|
- } else
|
|
|
- identity = eap_get_config_identity(sm, &identity_len);
|
|
|
- wpa_hexdump_ascii(MSG_DEBUG, "EAP-AKA: Selected identity for MK "
|
|
|
- "derivation", identity, identity_len);
|
|
|
- if (data->eap_method == EAP_TYPE_AKA_PRIME) {
|
|
|
- eap_aka_prime_derive_keys(identity, identity_len, data->ik,
|
|
|
- data->ck, data->k_encr, data->k_aut,
|
|
|
- data->k_re, data->msk, data->emsk);
|
|
|
- } else {
|
|
|
- eap_aka_derive_mk(identity, identity_len, data->ik, data->ck,
|
|
|
- data->mk);
|
|
|
- eap_sim_derive_keys(data->mk, data->k_encr, data->k_aut,
|
|
|
- data->msk, data->emsk);
|
|
|
- }
|
|
|
- if (eap_aka_verify_mac(data, reqData, attr->mac, (u8 *) "", 0)) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA: Challenge message "
|
|
|
- "used invalid AT_MAC");
|
|
|
- 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);
|
|
|
-
|
|
|
- if (attr->encr_data) {
|
|
|
- u8 *decrypted;
|
|
|
- decrypted = eap_sim_parse_encr(data->k_encr, attr->encr_data,
|
|
|
- attr->encr_data_len, attr->iv,
|
|
|
- &eattr, 0);
|
|
|
- if (decrypted == NULL) {
|
|
|
- return eap_aka_client_error(
|
|
|
- data, id, EAP_AKA_UNABLE_TO_PROCESS_PACKET);
|
|
|
- }
|
|
|
- eap_aka_learn_ids(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) {
|
|
|
- eap_aka_state(data, data->use_result_ind ?
|
|
|
- RESULT_SUCCESS : SUCCESS);
|
|
|
- }
|
|
|
-
|
|
|
- data->num_id_req = 0;
|
|
|
- data->num_notification = 0;
|
|
|
- /* RFC 4187 specifies that counter is initialized to one after
|
|
|
- * fullauth, but initializing it to zero makes it easier to implement
|
|
|
- * reauth verification. */
|
|
|
- data->counter = 0;
|
|
|
- return eap_aka_response_challenge(data, id);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int eap_aka_process_notification_reauth(struct eap_aka_data *data,
|
|
|
- struct eap_sim_attrs *attr)
|
|
|
-{
|
|
|
- struct eap_sim_attrs eattr;
|
|
|
- u8 *decrypted;
|
|
|
-
|
|
|
- if (attr->encr_data == NULL || attr->iv == NULL) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA: Notification message after "
|
|
|
- "reauth did not include encrypted data");
|
|
|
- return -1;
|
|
|
- }
|
|
|
-
|
|
|
- decrypted = eap_sim_parse_encr(data->k_encr, attr->encr_data,
|
|
|
- attr->encr_data_len, attr->iv, &eattr,
|
|
|
- 0);
|
|
|
- if (decrypted == NULL) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA: Failed to parse encrypted "
|
|
|
- "data from notification message");
|
|
|
- return -1;
|
|
|
- }
|
|
|
-
|
|
|
- if (eattr.counter < 0 || (size_t) eattr.counter != data->counter) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA: Counter in notification "
|
|
|
- "message does not match with counter in reauth "
|
|
|
- "message");
|
|
|
- os_free(decrypted);
|
|
|
- return -1;
|
|
|
- }
|
|
|
-
|
|
|
- os_free(decrypted);
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static int eap_aka_process_notification_auth(struct eap_aka_data *data,
|
|
|
- const struct wpabuf *reqData,
|
|
|
- struct eap_sim_attrs *attr)
|
|
|
-{
|
|
|
- if (attr->mac == NULL) {
|
|
|
- wpa_printf(MSG_INFO, "EAP-AKA: no AT_MAC in after_auth "
|
|
|
- "Notification message");
|
|
|
- return -1;
|
|
|
- }
|
|
|
-
|
|
|
- if (eap_aka_verify_mac(data, reqData, attr->mac, (u8 *) "", 0)) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA: Notification message "
|
|
|
- "used invalid AT_MAC");
|
|
|
- return -1;
|
|
|
- }
|
|
|
-
|
|
|
- if (data->reauth &&
|
|
|
- eap_aka_process_notification_reauth(data, attr)) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA: Invalid notification "
|
|
|
- "message after reauth");
|
|
|
- return -1;
|
|
|
- }
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static struct wpabuf * eap_aka_process_notification(
|
|
|
- struct eap_sm *sm, struct eap_aka_data *data, u8 id,
|
|
|
- const struct wpabuf *reqData, struct eap_sim_attrs *attr)
|
|
|
-{
|
|
|
- wpa_printf(MSG_DEBUG, "EAP-AKA: subtype Notification");
|
|
|
- if (data->num_notification > 0) {
|
|
|
- wpa_printf(MSG_INFO, "EAP-AKA: too many notification "
|
|
|
- "rounds (only one allowed)");
|
|
|
- return eap_aka_client_error(data, id,
|
|
|
- EAP_AKA_UNABLE_TO_PROCESS_PACKET);
|
|
|
- }
|
|
|
- data->num_notification++;
|
|
|
- if (attr->notification == -1) {
|
|
|
- wpa_printf(MSG_INFO, "EAP-AKA: no AT_NOTIFICATION in "
|
|
|
- "Notification message");
|
|
|
- return eap_aka_client_error(data, id,
|
|
|
- EAP_AKA_UNABLE_TO_PROCESS_PACKET);
|
|
|
- }
|
|
|
-
|
|
|
- if ((attr->notification & 0x4000) == 0 &&
|
|
|
- eap_aka_process_notification_auth(data, reqData, attr)) {
|
|
|
- return eap_aka_client_error(data, id,
|
|
|
- EAP_AKA_UNABLE_TO_PROCESS_PACKET);
|
|
|
- }
|
|
|
-
|
|
|
- eap_sim_report_notification(sm->msg_ctx, attr->notification, 1);
|
|
|
- if (attr->notification >= 0 && attr->notification < 32768) {
|
|
|
- eap_aka_state(data, FAILURE);
|
|
|
- } else if (attr->notification == EAP_SIM_SUCCESS &&
|
|
|
- data->state == RESULT_SUCCESS)
|
|
|
- eap_aka_state(data, SUCCESS);
|
|
|
- return eap_aka_response_notification(data, id, attr->notification);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static struct wpabuf * eap_aka_process_reauthentication(
|
|
|
- struct eap_sm *sm, struct eap_aka_data *data, u8 id,
|
|
|
- const struct wpabuf *reqData, struct eap_sim_attrs *attr)
|
|
|
-{
|
|
|
- struct eap_sim_attrs eattr;
|
|
|
- u8 *decrypted;
|
|
|
-
|
|
|
- wpa_printf(MSG_DEBUG, "EAP-AKA: subtype Reauthentication");
|
|
|
-
|
|
|
- if (attr->checkcode &&
|
|
|
- eap_aka_verify_checkcode(data, attr->checkcode,
|
|
|
- attr->checkcode_len)) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA: Invalid AT_CHECKCODE in the "
|
|
|
- "message");
|
|
|
- return eap_aka_client_error(data, id,
|
|
|
- EAP_AKA_UNABLE_TO_PROCESS_PACKET);
|
|
|
- }
|
|
|
-
|
|
|
- if (data->reauth_id == NULL) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA: Server is trying "
|
|
|
- "reauthentication, but no reauth_id available");
|
|
|
- return eap_aka_client_error(data, id,
|
|
|
- EAP_AKA_UNABLE_TO_PROCESS_PACKET);
|
|
|
- }
|
|
|
-
|
|
|
- data->reauth = 1;
|
|
|
- if (eap_aka_verify_mac(data, reqData, attr->mac, (u8 *) "", 0)) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA: Reauthentication "
|
|
|
- "did not have valid AT_MAC");
|
|
|
- return eap_aka_client_error(data, id,
|
|
|
- EAP_AKA_UNABLE_TO_PROCESS_PACKET);
|
|
|
- }
|
|
|
-
|
|
|
- if (attr->encr_data == NULL || attr->iv == NULL) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA: Reauthentication "
|
|
|
- "message did not include encrypted data");
|
|
|
- return eap_aka_client_error(data, id,
|
|
|
- EAP_AKA_UNABLE_TO_PROCESS_PACKET);
|
|
|
- }
|
|
|
-
|
|
|
- decrypted = eap_sim_parse_encr(data->k_encr, attr->encr_data,
|
|
|
- attr->encr_data_len, attr->iv, &eattr,
|
|
|
- 0);
|
|
|
- if (decrypted == NULL) {
|
|
|
- wpa_printf(MSG_WARNING, "EAP-AKA: Failed to parse encrypted "
|
|
|
- "data from reauthentication message");
|
|
|
- return eap_aka_client_error(data, id,
|
|
|
- EAP_AKA_UNABLE_TO_PROCESS_PACKET);
|
|
|
- }
|
|
|
-
|
|
|
- if (eattr.nonce_s == NULL || eattr.counter < 0) {
|
|
|
- wpa_printf(MSG_INFO, "EAP-AKA: (encr) No%s%s in reauth packet",
|
|
|
- !eattr.nonce_s ? " AT_NONCE_S" : "",
|
|
|
- eattr.counter < 0 ? " AT_COUNTER" : "");
|
|
|
- os_free(decrypted);
|
|
|
- return eap_aka_client_error(data, id,
|
|
|
- EAP_AKA_UNABLE_TO_PROCESS_PACKET);
|
|
|
- }
|
|
|
-
|
|
|
- if (eattr.counter < 0 || (size_t) eattr.counter <= data->counter) {
|
|
|
- struct wpabuf *res;
|
|
|
- wpa_printf(MSG_INFO, "EAP-AKA: (encr) Invalid counter "
|
|
|
- "(%d <= %d)", eattr.counter, data->counter);
|
|
|
- data->counter_too_small = eattr.counter;
|
|
|
-
|
|
|
- /* Reply using Re-auth w/ AT_COUNTER_TOO_SMALL. The current
|
|
|
- * reauth_id must not be used to start a new reauthentication.
|
|
|
- * However, since it was used in the last EAP-Response-Identity
|
|
|
- * packet, it has to saved for the following fullauth to be
|
|
|
- * used in MK derivation. */
|
|
|
- os_free(data->last_eap_identity);
|
|
|
- data->last_eap_identity = data->reauth_id;
|
|
|
- data->last_eap_identity_len = data->reauth_id_len;
|
|
|
- data->reauth_id = NULL;
|
|
|
- data->reauth_id_len = 0;
|
|
|
-
|
|
|
- res = eap_aka_response_reauth(data, id, 1, eattr.nonce_s);
|
|
|
- os_free(decrypted);
|
|
|
-
|
|
|
- return res;
|
|
|
- }
|
|
|
- data->counter = eattr.counter;
|
|
|
-
|
|
|
- os_memcpy(data->nonce_s, eattr.nonce_s, EAP_SIM_NONCE_S_LEN);
|
|
|
- wpa_hexdump(MSG_DEBUG, "EAP-AKA: (encr) AT_NONCE_S",
|
|
|
- data->nonce_s, EAP_SIM_NONCE_S_LEN);
|
|
|
-
|
|
|
- if (data->eap_method == EAP_TYPE_AKA_PRIME) {
|
|
|
- eap_aka_prime_derive_keys_reauth(data->k_re, data->counter,
|
|
|
- data->reauth_id,
|
|
|
- data->reauth_id_len,
|
|
|
- data->nonce_s,
|
|
|
- data->msk, data->emsk);
|
|
|
- } else {
|
|
|
- eap_sim_derive_keys_reauth(data->counter, data->reauth_id,
|
|
|
- data->reauth_id_len,
|
|
|
- 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);
|
|
|
-
|
|
|
- if (data->result_ind && attr->result_ind)
|
|
|
- data->use_result_ind = 1;
|
|
|
-
|
|
|
- if (data->state != FAILURE && data->state != RESULT_FAILURE) {
|
|
|
- eap_aka_state(data, data->use_result_ind ?
|
|
|
- RESULT_SUCCESS : SUCCESS);
|
|
|
- }
|
|
|
-
|
|
|
- data->num_id_req = 0;
|
|
|
- data->num_notification = 0;
|
|
|
- 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);
|
|
|
- }
|
|
|
- os_free(decrypted);
|
|
|
- return eap_aka_response_reauth(data, id, 0, data->nonce_s);
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static struct wpabuf * eap_aka_process(struct eap_sm *sm, void *priv,
|
|
|
- struct eap_method_ret *ret,
|
|
|
- const struct wpabuf *reqData)
|
|
|
-{
|
|
|
- struct eap_aka_data *data = priv;
|
|
|
- const struct eap_hdr *req;
|
|
|
- u8 subtype, id;
|
|
|
- struct wpabuf *res;
|
|
|
- const u8 *pos;
|
|
|
- struct eap_sim_attrs attr;
|
|
|
- size_t len;
|
|
|
-
|
|
|
- wpa_hexdump_buf(MSG_DEBUG, "EAP-AKA: EAP data", reqData);
|
|
|
- if (eap_get_config_identity(sm, &len) == NULL) {
|
|
|
- wpa_printf(MSG_INFO, "EAP-AKA: Identity not configured");
|
|
|
- eap_sm_request_identity(sm);
|
|
|
- ret->ignore = TRUE;
|
|
|
- return NULL;
|
|
|
- }
|
|
|
-
|
|
|
- pos = eap_hdr_validate(EAP_VENDOR_IETF, data->eap_method, reqData,
|
|
|
- &len);
|
|
|
- if (pos == NULL || len < 1) {
|
|
|
- ret->ignore = TRUE;
|
|
|
- return NULL;
|
|
|
- }
|
|
|
- req = wpabuf_head(reqData);
|
|
|
- id = req->identifier;
|
|
|
- len = be_to_host16(req->length);
|
|
|
-
|
|
|
- ret->ignore = FALSE;
|
|
|
- ret->methodState = METHOD_MAY_CONT;
|
|
|
- ret->decision = DECISION_FAIL;
|
|
|
- ret->allowNotifications = TRUE;
|
|
|
-
|
|
|
- subtype = *pos++;
|
|
|
- wpa_printf(MSG_DEBUG, "EAP-AKA: Subtype=%d", subtype);
|
|
|
- pos += 2; /* Reserved */
|
|
|
-
|
|
|
- if (eap_sim_parse_attr(pos, wpabuf_head_u8(reqData) + len, &attr,
|
|
|
- data->eap_method == EAP_TYPE_AKA_PRIME ? 2 : 1,
|
|
|
- 0)) {
|
|
|
- res = eap_aka_client_error(data, id,
|
|
|
- EAP_AKA_UNABLE_TO_PROCESS_PACKET);
|
|
|
- goto done;
|
|
|
- }
|
|
|
-
|
|
|
- switch (subtype) {
|
|
|
- case EAP_AKA_SUBTYPE_IDENTITY:
|
|
|
- res = eap_aka_process_identity(sm, data, id, reqData, &attr);
|
|
|
- break;
|
|
|
- case EAP_AKA_SUBTYPE_CHALLENGE:
|
|
|
- res = eap_aka_process_challenge(sm, data, id, reqData, &attr);
|
|
|
- break;
|
|
|
- case EAP_AKA_SUBTYPE_NOTIFICATION:
|
|
|
- res = eap_aka_process_notification(sm, data, id, reqData,
|
|
|
- &attr);
|
|
|
- break;
|
|
|
- case EAP_AKA_SUBTYPE_REAUTHENTICATION:
|
|
|
- res = eap_aka_process_reauthentication(sm, data, id, reqData,
|
|
|
- &attr);
|
|
|
- break;
|
|
|
- case EAP_AKA_SUBTYPE_CLIENT_ERROR:
|
|
|
- wpa_printf(MSG_DEBUG, "EAP-AKA: subtype Client-Error");
|
|
|
- res = eap_aka_client_error(data, id,
|
|
|
- EAP_AKA_UNABLE_TO_PROCESS_PACKET);
|
|
|
- break;
|
|
|
- default:
|
|
|
- wpa_printf(MSG_DEBUG, "EAP-AKA: Unknown subtype=%d", subtype);
|
|
|
- res = eap_aka_client_error(data, id,
|
|
|
- EAP_AKA_UNABLE_TO_PROCESS_PACKET);
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
-done:
|
|
|
- if (data->state == FAILURE) {
|
|
|
- ret->decision = DECISION_FAIL;
|
|
|
- ret->methodState = METHOD_DONE;
|
|
|
- } else if (data->state == SUCCESS) {
|
|
|
- ret->decision = data->use_result_ind ?
|
|
|
- DECISION_UNCOND_SUCC : DECISION_COND_SUCC;
|
|
|
- /*
|
|
|
- * It is possible for the server to reply with AKA
|
|
|
- * Notification, so we must allow the method to continue and
|
|
|
- * not only accept EAP-Success at this point.
|
|
|
- */
|
|
|
- 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)
|
|
|
- ret->methodState = METHOD_CONT;
|
|
|
-
|
|
|
- if (ret->methodState == METHOD_DONE) {
|
|
|
- ret->allowNotifications = FALSE;
|
|
|
- }
|
|
|
-
|
|
|
- return res;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static Boolean eap_aka_has_reauth_data(struct eap_sm *sm, void *priv)
|
|
|
-{
|
|
|
- struct eap_aka_data *data = priv;
|
|
|
- return data->pseudonym || data->reauth_id;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-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);
|
|
|
- data->prev_id = -1;
|
|
|
- wpabuf_free(data->id_msgs);
|
|
|
- data->id_msgs = NULL;
|
|
|
- data->use_result_ind = 0;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static void * eap_aka_init_for_reauth(struct eap_sm *sm, void *priv)
|
|
|
-{
|
|
|
- struct eap_aka_data *data = priv;
|
|
|
- data->num_id_req = 0;
|
|
|
- data->num_notification = 0;
|
|
|
- eap_aka_state(data, CONTINUE);
|
|
|
- return priv;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static const u8 * eap_aka_get_identity(struct eap_sm *sm, void *priv,
|
|
|
- size_t *len)
|
|
|
-{
|
|
|
- struct eap_aka_data *data = priv;
|
|
|
-
|
|
|
- if (data->reauth_id) {
|
|
|
- *len = data->reauth_id_len;
|
|
|
- return data->reauth_id;
|
|
|
- }
|
|
|
-
|
|
|
- if (data->pseudonym) {
|
|
|
- *len = data->pseudonym_len;
|
|
|
- return data->pseudonym;
|
|
|
- }
|
|
|
-
|
|
|
- return NULL;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static Boolean eap_aka_isKeyAvailable(struct eap_sm *sm, void *priv)
|
|
|
-{
|
|
|
- struct eap_aka_data *data = priv;
|
|
|
- return data->state == SUCCESS;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static u8 * eap_aka_getKey(struct eap_sm *sm, void *priv, size_t *len)
|
|
|
-{
|
|
|
- struct eap_aka_data *data = priv;
|
|
|
- u8 *key;
|
|
|
-
|
|
|
- if (data->state != SUCCESS)
|
|
|
- return NULL;
|
|
|
-
|
|
|
- key = os_malloc(EAP_SIM_KEYING_DATA_LEN);
|
|
|
- if (key == NULL)
|
|
|
- return NULL;
|
|
|
-
|
|
|
- *len = EAP_SIM_KEYING_DATA_LEN;
|
|
|
- os_memcpy(key, data->msk, EAP_SIM_KEYING_DATA_LEN);
|
|
|
-
|
|
|
- return key;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-static u8 * eap_aka_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
|
|
|
-{
|
|
|
- struct eap_aka_data *data = priv;
|
|
|
- u8 *key;
|
|
|
-
|
|
|
- if (data->state != SUCCESS)
|
|
|
- return NULL;
|
|
|
-
|
|
|
- key = os_malloc(EAP_EMSK_LEN);
|
|
|
- if (key == NULL)
|
|
|
- return NULL;
|
|
|
-
|
|
|
- *len = EAP_EMSK_LEN;
|
|
|
- os_memcpy(key, data->emsk, EAP_EMSK_LEN);
|
|
|
-
|
|
|
- return key;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-int eap_peer_aka_prime_register(void)
|
|
|
-{
|
|
|
- struct eap_method *eap;
|
|
|
- int ret;
|
|
|
-
|
|
|
- eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
|
|
|
- EAP_VENDOR_IETF, EAP_TYPE_AKA_PRIME,
|
|
|
- "AKA'");
|
|
|
- if (eap == NULL)
|
|
|
- return -1;
|
|
|
-
|
|
|
- eap->init = eap_aka_prime_init;
|
|
|
- eap->deinit = eap_aka_deinit;
|
|
|
- eap->process = eap_aka_process;
|
|
|
- eap->isKeyAvailable = eap_aka_isKeyAvailable;
|
|
|
- eap->getKey = eap_aka_getKey;
|
|
|
- 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->get_identity = eap_aka_get_identity;
|
|
|
- eap->get_emsk = eap_aka_get_emsk;
|
|
|
-
|
|
|
- ret = eap_peer_method_register(eap);
|
|
|
- if (ret)
|
|
|
- eap_peer_method_free(eap);
|
|
|
-
|
|
|
-#ifdef EAP_AKA_PRIME_BOTH
|
|
|
- if (ret)
|
|
|
- return ret;
|
|
|
-
|
|
|
- eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
|
|
|
- EAP_VENDOR_IETF, EAP_TYPE_AKA,
|
|
|
- "AKA");
|
|
|
- if (eap == NULL)
|
|
|
- return -1;
|
|
|
-
|
|
|
- eap->init = eap_aka_init;
|
|
|
- eap->deinit = eap_aka_deinit;
|
|
|
- eap->process = eap_aka_process;
|
|
|
- eap->isKeyAvailable = eap_aka_isKeyAvailable;
|
|
|
- eap->getKey = eap_aka_getKey;
|
|
|
- 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->get_identity = eap_aka_get_identity;
|
|
|
- eap->get_emsk = eap_aka_get_emsk;
|
|
|
-
|
|
|
- ret = eap_peer_method_register(eap);
|
|
|
- if (ret)
|
|
|
- eap_peer_method_free(eap);
|
|
|
-#endif /* EAP_AKA_PRIME_BOTH */
|
|
|
-
|
|
|
- return ret;
|
|
|
-}
|
Jouni Malinen