mirror of
https://github.com/vanhoefm/fragattacks.git
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ea52a46e13
If init_for_reauth fails, the EAP-SIM peer state was not freed properly. Use eap_sim_deinit() to make sure all allocations get freed. This could be hit only if no random data could be derived for NONCE_MT. Signed-off-by: Jouni Malinen <j@w1.fi>
1262 lines
34 KiB
C
1262 lines
34 KiB
C
/*
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* EAP peer method: EAP-SIM (RFC 4186)
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* Copyright (c) 2004-2012, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#include "includes.h"
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#include "common.h"
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#include "pcsc_funcs.h"
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#include "crypto/milenage.h"
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#include "crypto/random.h"
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#include "eap_peer/eap_i.h"
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#include "eap_config.h"
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#include "eap_common/eap_sim_common.h"
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struct eap_sim_data {
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u8 *ver_list;
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size_t ver_list_len;
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int selected_version;
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size_t min_num_chal, num_chal;
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u8 kc[3][EAP_SIM_KC_LEN];
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u8 sres[3][EAP_SIM_SRES_LEN];
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u8 nonce_mt[EAP_SIM_NONCE_MT_LEN], 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_SIM_K_AUT_LEN];
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u8 k_encr[EAP_SIM_K_ENCR_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[3][GSM_RAND_LEN];
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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, SUCCESS, FAILURE
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} state;
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int result_ind, use_result_ind;
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};
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#ifndef CONFIG_NO_STDOUT_DEBUG
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static const char * eap_sim_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 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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static void eap_sim_state(struct eap_sim_data *data, int state)
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{
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wpa_printf(MSG_DEBUG, "EAP-SIM: %s -> %s",
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eap_sim_state_txt(data->state),
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eap_sim_state_txt(state));
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data->state = state;
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}
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static void * eap_sim_init(struct eap_sm *sm)
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{
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struct eap_sim_data *data;
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struct eap_peer_config *config = eap_get_config(sm);
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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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if (random_get_bytes(data->nonce_mt, EAP_SIM_NONCE_MT_LEN)) {
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wpa_printf(MSG_WARNING, "EAP-SIM: Failed to get random data "
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"for NONCE_MT");
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os_free(data);
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return NULL;
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}
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data->min_num_chal = 2;
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if (config && config->phase1) {
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char *pos = os_strstr(config->phase1, "sim_min_num_chal=");
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if (pos) {
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data->min_num_chal = atoi(pos + 17);
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if (data->min_num_chal < 2 || data->min_num_chal > 3) {
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wpa_printf(MSG_WARNING, "EAP-SIM: Invalid "
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"sim_min_num_chal configuration "
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"(%lu, expected 2 or 3)",
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(unsigned long) data->min_num_chal);
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os_free(data);
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return NULL;
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}
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wpa_printf(MSG_DEBUG, "EAP-SIM: Set minimum number of "
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"challenges to %lu",
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(unsigned long) data->min_num_chal);
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}
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data->result_ind = os_strstr(config->phase1, "result_ind=1") !=
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NULL;
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}
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if (config && config->anonymous_identity) {
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data->pseudonym = os_malloc(config->anonymous_identity_len);
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if (data->pseudonym) {
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os_memcpy(data->pseudonym, config->anonymous_identity,
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config->anonymous_identity_len);
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data->pseudonym_len = config->anonymous_identity_len;
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}
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}
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eap_sim_state(data, CONTINUE);
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return data;
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}
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static void eap_sim_clear_keys(struct eap_sim_data *data, int reauth)
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{
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if (!reauth) {
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os_memset(data->mk, 0, EAP_SIM_MK_LEN);
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os_memset(data->k_aut, 0, EAP_SIM_K_AUT_LEN);
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os_memset(data->k_encr, 0, EAP_SIM_K_ENCR_LEN);
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}
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os_memset(data->kc, 0, 3 * EAP_SIM_KC_LEN);
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os_memset(data->sres, 0, 3 * EAP_SIM_SRES_LEN);
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os_memset(data->msk, 0, EAP_SIM_KEYING_DATA_LEN);
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os_memset(data->emsk, 0, EAP_EMSK_LEN);
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}
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static void eap_sim_deinit(struct eap_sm *sm, void *priv)
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{
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struct eap_sim_data *data = priv;
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if (data) {
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os_free(data->ver_list);
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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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eap_sim_clear_keys(data, 0);
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os_free(data);
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}
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}
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static int eap_sim_ext_sim_req(struct eap_sm *sm, struct eap_sim_data *data)
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{
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char req[200], *pos, *end;
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size_t i;
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wpa_printf(MSG_DEBUG, "EAP-SIM: Use external SIM processing");
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pos = req;
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end = pos + sizeof(req);
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pos += os_snprintf(pos, end - pos, "GSM-AUTH");
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for (i = 0; i < data->num_chal; i++) {
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pos += os_snprintf(pos, end - pos, ":");
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pos += wpa_snprintf_hex(pos, end - pos, data->rand[i],
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GSM_RAND_LEN);
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}
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eap_sm_request_sim(sm, req);
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return 1;
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}
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static int eap_sim_ext_sim_result(struct eap_sm *sm, struct eap_sim_data *data,
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struct eap_peer_config *conf)
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{
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char *resp, *pos;
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size_t i;
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wpa_printf(MSG_DEBUG,
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"EAP-SIM: Use result from external SIM processing");
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resp = conf->external_sim_resp;
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conf->external_sim_resp = NULL;
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if (os_strncmp(resp, "GSM-AUTH:", 9) != 0) {
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wpa_printf(MSG_DEBUG, "EAP-SIM: Unrecognized external SIM processing response");
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os_free(resp);
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return -1;
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}
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pos = resp + 9;
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for (i = 0; i < data->num_chal; i++) {
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wpa_hexdump(MSG_DEBUG, "EAP-SIM: RAND",
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data->rand[i], GSM_RAND_LEN);
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if (hexstr2bin(pos, data->kc[i], EAP_SIM_KC_LEN) < 0)
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goto invalid;
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wpa_hexdump_key(MSG_DEBUG, "EAP-SIM: Kc",
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data->kc[i], EAP_SIM_KC_LEN);
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pos += EAP_SIM_KC_LEN * 2;
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if (*pos != ':')
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goto invalid;
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pos++;
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if (hexstr2bin(pos, data->sres[i], EAP_SIM_SRES_LEN) < 0)
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goto invalid;
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wpa_hexdump_key(MSG_DEBUG, "EAP-SIM: SRES",
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data->sres[i], EAP_SIM_SRES_LEN);
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pos += EAP_SIM_SRES_LEN * 2;
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if (i + 1 < data->num_chal) {
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if (*pos != ':')
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goto invalid;
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pos++;
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}
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}
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os_free(resp);
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return 0;
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invalid:
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wpa_printf(MSG_DEBUG, "EAP-SIM: Invalid external SIM processing GSM-AUTH response");
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os_free(resp);
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return -1;
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}
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static int eap_sim_gsm_auth(struct eap_sm *sm, struct eap_sim_data *data)
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{
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struct eap_peer_config *conf;
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wpa_printf(MSG_DEBUG, "EAP-SIM: GSM authentication algorithm");
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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 (sm->external_sim) {
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if (conf->external_sim_resp)
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return eap_sim_ext_sim_result(sm, data, conf);
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else
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return eap_sim_ext_sim_req(sm, data);
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}
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if (conf->pcsc) {
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if (scard_gsm_auth(sm->scard_ctx, data->rand[0],
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data->sres[0], data->kc[0]) ||
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scard_gsm_auth(sm->scard_ctx, data->rand[1],
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data->sres[1], data->kc[1]) ||
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(data->num_chal > 2 &&
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scard_gsm_auth(sm->scard_ctx, data->rand[2],
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data->sres[2], data->kc[2]))) {
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wpa_printf(MSG_DEBUG, "EAP-SIM: GSM SIM "
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"authentication could not be completed");
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return -1;
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}
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return 0;
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}
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#ifdef CONFIG_SIM_SIMULATOR
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if (conf->password) {
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u8 opc[16], k[16];
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const char *pos;
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size_t i;
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wpa_printf(MSG_DEBUG, "EAP-SIM: Use internal GSM-Milenage "
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"implementation for authentication");
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if (conf->password_len < 65) {
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wpa_printf(MSG_DEBUG, "EAP-SIM: invalid GSM-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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if (hexstr2bin(pos, opc, 16))
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return -1;
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for (i = 0; i < data->num_chal; i++) {
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if (gsm_milenage(opc, k, data->rand[i],
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data->sres[i], data->kc[i])) {
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wpa_printf(MSG_DEBUG, "EAP-SIM: "
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"GSM-Milenage authentication "
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"could not be completed");
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return -1;
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}
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wpa_hexdump(MSG_DEBUG, "EAP-SIM: RAND",
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data->rand[i], GSM_RAND_LEN);
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wpa_hexdump_key(MSG_DEBUG, "EAP-SIM: SRES",
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data->sres[i], EAP_SIM_SRES_LEN);
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wpa_hexdump_key(MSG_DEBUG, "EAP-SIM: Kc",
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data->kc[i], EAP_SIM_KC_LEN);
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}
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return 0;
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}
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#endif /* CONFIG_SIM_SIMULATOR */
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#ifdef CONFIG_SIM_HARDCODED
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/* These hardcoded Kc and SRES values are used for testing. RAND to
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* KC/SREC mapping is very bogus as far as real authentication is
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* concerned, but it is quite useful for cases where the AS is rotating
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* the order of pre-configured values. */
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{
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size_t i;
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wpa_printf(MSG_DEBUG, "EAP-SIM: Use hardcoded Kc and SRES "
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"values for testing");
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for (i = 0; i < data->num_chal; i++) {
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if (data->rand[i][0] == 0xaa) {
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os_memcpy(data->kc[i],
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"\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7",
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EAP_SIM_KC_LEN);
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os_memcpy(data->sres[i], "\xd1\xd2\xd3\xd4",
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EAP_SIM_SRES_LEN);
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} else if (data->rand[i][0] == 0xbb) {
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os_memcpy(data->kc[i],
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"\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7",
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EAP_SIM_KC_LEN);
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os_memcpy(data->sres[i], "\xe1\xe2\xe3\xe4",
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EAP_SIM_SRES_LEN);
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} else {
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os_memcpy(data->kc[i],
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"\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7",
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EAP_SIM_KC_LEN);
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os_memcpy(data->sres[i], "\xf1\xf2\xf3\xf4",
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EAP_SIM_SRES_LEN);
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}
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}
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}
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return 0;
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#else /* CONFIG_SIM_HARDCODED */
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wpa_printf(MSG_DEBUG, "EAP-SIM: No GSM authentication algorithm "
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"enabled");
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return -1;
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#endif /* CONFIG_SIM_HARDCODED */
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}
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static int eap_sim_supported_ver(int version)
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{
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return version == EAP_SIM_VERSION;
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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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static void eap_sim_clear_identities(struct eap_sm *sm,
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struct eap_sim_data *data, int id)
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{
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if ((id & CLEAR_PSEUDONYM) && data->pseudonym) {
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wpa_printf(MSG_DEBUG, "EAP-SIM: forgetting old 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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eap_set_anon_id(sm, NULL, 0);
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}
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if ((id & CLEAR_REAUTH_ID) && data->reauth_id) {
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wpa_printf(MSG_DEBUG, "EAP-SIM: forgetting old 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) && data->last_eap_identity) {
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wpa_printf(MSG_DEBUG, "EAP-SIM: forgetting old 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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static int eap_sim_learn_ids(struct eap_sm *sm, struct eap_sim_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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const u8 *identity = NULL;
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size_t identity_len = 0;
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const u8 *realm = NULL;
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size_t realm_len = 0;
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wpa_hexdump_ascii(MSG_DEBUG,
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"EAP-SIM: (encr) AT_NEXT_PSEUDONYM",
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attr->next_pseudonym,
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attr->next_pseudonym_len);
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os_free(data->pseudonym);
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/* Look for the realm of the permanent identity */
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identity = eap_get_config_identity(sm, &identity_len);
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if (identity) {
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for (realm = identity, realm_len = identity_len;
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realm_len > 0; realm_len--, realm++) {
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if (*realm == '@')
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break;
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}
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}
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data->pseudonym = os_malloc(attr->next_pseudonym_len +
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realm_len);
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if (data->pseudonym == NULL) {
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wpa_printf(MSG_INFO, "EAP-SIM: (encr) No memory for "
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"next pseudonym");
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data->pseudonym_len = 0;
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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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if (realm_len) {
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os_memcpy(data->pseudonym + attr->next_pseudonym_len,
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realm, realm_len);
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}
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data->pseudonym_len = attr->next_pseudonym_len + realm_len;
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eap_set_anon_id(sm, data->pseudonym, data->pseudonym_len);
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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-SIM: (encr) No memory for "
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"next reauth_id");
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data->reauth_id_len = 0;
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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-SIM: (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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return 0;
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}
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|
|
|
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static struct wpabuf * eap_sim_client_error(struct eap_sim_data *data, u8 id,
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int err)
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{
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struct eap_sim_msg *msg;
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eap_sim_state(data, FAILURE);
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data->num_id_req = 0;
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data->num_notification = 0;
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wpa_printf(MSG_DEBUG, "EAP-SIM: Send Client-Error (error code %d)",
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err);
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msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, EAP_TYPE_SIM,
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EAP_SIM_SUBTYPE_CLIENT_ERROR);
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eap_sim_msg_add(msg, EAP_SIM_AT_CLIENT_ERROR_CODE, err, NULL, 0);
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return eap_sim_msg_finish(msg, EAP_TYPE_SIM, NULL, NULL, 0);
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}
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|
|
|
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static struct wpabuf * eap_sim_response_start(struct eap_sm *sm,
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struct eap_sim_data *data, u8 id,
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enum eap_sim_id_req id_req)
|
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{
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const u8 *identity = NULL;
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size_t identity_len = 0;
|
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struct eap_sim_msg *msg;
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|
|
|
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_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(sm, data, CLEAR_PSEUDONYM |
|
|
CLEAR_REAUTH_ID);
|
|
}
|
|
}
|
|
if (id_req != NO_ID_REQ)
|
|
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,
|
|
EAP_TYPE_SIM, EAP_SIM_SUBTYPE_START);
|
|
if (!data->reauth) {
|
|
wpa_hexdump(MSG_DEBUG, " AT_NONCE_MT",
|
|
data->nonce_mt, EAP_SIM_NONCE_MT_LEN);
|
|
eap_sim_msg_add(msg, EAP_SIM_AT_NONCE_MT, 0,
|
|
data->nonce_mt, EAP_SIM_NONCE_MT_LEN);
|
|
wpa_printf(MSG_DEBUG, " AT_SELECTED_VERSION %d",
|
|
data->selected_version);
|
|
eap_sim_msg_add(msg, EAP_SIM_AT_SELECTED_VERSION,
|
|
data->selected_version, NULL, 0);
|
|
}
|
|
|
|
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, EAP_TYPE_SIM, NULL, NULL, 0);
|
|
}
|
|
|
|
|
|
static struct wpabuf * eap_sim_response_challenge(struct eap_sim_data *data,
|
|
u8 id)
|
|
{
|
|
struct eap_sim_msg *msg;
|
|
|
|
wpa_printf(MSG_DEBUG, "Generating EAP-SIM Challenge (id=%d)", id);
|
|
msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, EAP_TYPE_SIM,
|
|
EAP_SIM_SUBTYPE_CHALLENGE);
|
|
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, EAP_TYPE_SIM, data->k_aut,
|
|
(u8 *) data->sres,
|
|
data->num_chal * EAP_SIM_SRES_LEN);
|
|
}
|
|
|
|
|
|
static struct wpabuf * eap_sim_response_reauth(struct eap_sim_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-SIM Reauthentication (id=%d)",
|
|
id);
|
|
msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, EAP_TYPE_SIM,
|
|
EAP_SIM_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-SIM: Failed to encrypt "
|
|
"AT_ENCR_DATA");
|
|
eap_sim_msg_free(msg);
|
|
return NULL;
|
|
}
|
|
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, EAP_TYPE_SIM, data->k_aut, nonce_s,
|
|
EAP_SIM_NONCE_S_LEN);
|
|
}
|
|
|
|
|
|
static struct wpabuf * eap_sim_response_notification(struct eap_sim_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-SIM Notification (id=%d)", id);
|
|
msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id,
|
|
EAP_TYPE_SIM, EAP_SIM_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-SIM: 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, EAP_TYPE_SIM, k_aut, (u8 *) "", 0);
|
|
}
|
|
|
|
|
|
static struct wpabuf * eap_sim_process_start(struct eap_sm *sm,
|
|
struct eap_sim_data *data, u8 id,
|
|
struct eap_sim_attrs *attr)
|
|
{
|
|
int selected_version = -1, id_error;
|
|
size_t i;
|
|
u8 *pos;
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-SIM: subtype Start");
|
|
if (attr->version_list == NULL) {
|
|
wpa_printf(MSG_INFO, "EAP-SIM: No AT_VERSION_LIST in "
|
|
"SIM/Start");
|
|
return eap_sim_client_error(data, id,
|
|
EAP_SIM_UNSUPPORTED_VERSION);
|
|
}
|
|
|
|
os_free(data->ver_list);
|
|
data->ver_list = os_malloc(attr->version_list_len);
|
|
if (data->ver_list == NULL) {
|
|
wpa_printf(MSG_DEBUG, "EAP-SIM: Failed to allocate "
|
|
"memory for version list");
|
|
return eap_sim_client_error(data, id,
|
|
EAP_SIM_UNABLE_TO_PROCESS_PACKET);
|
|
}
|
|
os_memcpy(data->ver_list, attr->version_list, attr->version_list_len);
|
|
data->ver_list_len = attr->version_list_len;
|
|
pos = data->ver_list;
|
|
for (i = 0; i < data->ver_list_len / 2; i++) {
|
|
int ver = pos[0] * 256 + pos[1];
|
|
pos += 2;
|
|
if (eap_sim_supported_ver(ver)) {
|
|
selected_version = ver;
|
|
break;
|
|
}
|
|
}
|
|
if (selected_version < 0) {
|
|
wpa_printf(MSG_INFO, "EAP-SIM: Could not find a supported "
|
|
"version");
|
|
return eap_sim_client_error(data, id,
|
|
EAP_SIM_UNSUPPORTED_VERSION);
|
|
}
|
|
wpa_printf(MSG_DEBUG, "EAP-SIM: Selected Version %d",
|
|
selected_version);
|
|
data->selected_version = selected_version;
|
|
|
|
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-SIM: Too many ID requests "
|
|
"used within one authentication");
|
|
return eap_sim_client_error(data, id,
|
|
EAP_SIM_UNABLE_TO_PROCESS_PACKET);
|
|
}
|
|
|
|
return eap_sim_response_start(sm, data, id, attr->id_req);
|
|
}
|
|
|
|
|
|
static struct wpabuf * eap_sim_process_challenge(struct eap_sm *sm,
|
|
struct eap_sim_data *data,
|
|
u8 id,
|
|
const struct wpabuf *reqData,
|
|
struct eap_sim_attrs *attr)
|
|
{
|
|
const u8 *identity;
|
|
size_t identity_len;
|
|
struct eap_sim_attrs eattr;
|
|
int res;
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-SIM: subtype Challenge");
|
|
data->reauth = 0;
|
|
if (!attr->mac || !attr->rand) {
|
|
wpa_printf(MSG_WARNING, "EAP-SIM: Challenge message "
|
|
"did not include%s%s",
|
|
!attr->mac ? " AT_MAC" : "",
|
|
!attr->rand ? " AT_RAND" : "");
|
|
return eap_sim_client_error(data, id,
|
|
EAP_SIM_UNABLE_TO_PROCESS_PACKET);
|
|
}
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-SIM: %lu challenges",
|
|
(unsigned long) attr->num_chal);
|
|
if (attr->num_chal < data->min_num_chal) {
|
|
wpa_printf(MSG_INFO, "EAP-SIM: Insufficient number of "
|
|
"challenges (%lu)", (unsigned long) attr->num_chal);
|
|
return eap_sim_client_error(data, id,
|
|
EAP_SIM_INSUFFICIENT_NUM_OF_CHAL);
|
|
}
|
|
if (attr->num_chal > 3) {
|
|
wpa_printf(MSG_INFO, "EAP-SIM: Too many challenges "
|
|
"(%lu)", (unsigned long) attr->num_chal);
|
|
return eap_sim_client_error(data, id,
|
|
EAP_SIM_UNABLE_TO_PROCESS_PACKET);
|
|
}
|
|
|
|
/* Verify that RANDs are different */
|
|
if (os_memcmp(attr->rand, attr->rand + GSM_RAND_LEN,
|
|
GSM_RAND_LEN) == 0 ||
|
|
(attr->num_chal > 2 &&
|
|
(os_memcmp(attr->rand, attr->rand + 2 * GSM_RAND_LEN,
|
|
GSM_RAND_LEN) == 0 ||
|
|
os_memcmp(attr->rand + GSM_RAND_LEN,
|
|
attr->rand + 2 * GSM_RAND_LEN,
|
|
GSM_RAND_LEN) == 0))) {
|
|
wpa_printf(MSG_INFO, "EAP-SIM: Same RAND used multiple times");
|
|
return eap_sim_client_error(data, id,
|
|
EAP_SIM_RAND_NOT_FRESH);
|
|
}
|
|
|
|
os_memcpy(data->rand, attr->rand, attr->num_chal * GSM_RAND_LEN);
|
|
data->num_chal = attr->num_chal;
|
|
|
|
res = eap_sim_gsm_auth(sm, data);
|
|
if (res > 0) {
|
|
wpa_printf(MSG_DEBUG, "EAP-SIM: Wait for external SIM processing");
|
|
return NULL;
|
|
}
|
|
if (res) {
|
|
wpa_printf(MSG_WARNING, "EAP-SIM: GSM authentication failed");
|
|
return eap_sim_client_error(data, id,
|
|
EAP_SIM_UNABLE_TO_PROCESS_PACKET);
|
|
}
|
|
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-SIM: Selected identity for MK "
|
|
"derivation", identity, identity_len);
|
|
eap_sim_derive_mk(identity, identity_len, data->nonce_mt,
|
|
data->selected_version, data->ver_list,
|
|
data->ver_list_len, data->num_chal,
|
|
(const u8 *) data->kc, data->mk);
|
|
eap_sim_derive_keys(data->mk, data->k_encr, data->k_aut, data->msk,
|
|
data->emsk);
|
|
if (eap_sim_verify_mac(data->k_aut, reqData, attr->mac, data->nonce_mt,
|
|
EAP_SIM_NONCE_MT_LEN)) {
|
|
wpa_printf(MSG_WARNING, "EAP-SIM: Challenge message "
|
|
"used invalid AT_MAC");
|
|
return eap_sim_client_error(data, id,
|
|
EAP_SIM_UNABLE_TO_PROCESS_PACKET);
|
|
}
|
|
|
|
/* Old reauthentication identity must not be used anymore. In
|
|
* 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(sm, data, 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_sim_client_error(
|
|
data, id, EAP_SIM_UNABLE_TO_PROCESS_PACKET);
|
|
}
|
|
eap_sim_learn_ids(sm, data, &eattr);
|
|
os_free(decrypted);
|
|
}
|
|
|
|
if (data->result_ind && attr->result_ind)
|
|
data->use_result_ind = 1;
|
|
|
|
if (data->state != FAILURE) {
|
|
eap_sim_state(data, data->use_result_ind ?
|
|
RESULT_SUCCESS : SUCCESS);
|
|
}
|
|
|
|
data->num_id_req = 0;
|
|
data->num_notification = 0;
|
|
/* RFC 4186 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_sim_response_challenge(data, id);
|
|
}
|
|
|
|
|
|
static int eap_sim_process_notification_reauth(struct eap_sim_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-SIM: 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-SIM: 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-SIM: 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_sim_process_notification_auth(struct eap_sim_data *data,
|
|
const struct wpabuf *reqData,
|
|
struct eap_sim_attrs *attr)
|
|
{
|
|
if (attr->mac == NULL) {
|
|
wpa_printf(MSG_INFO, "EAP-SIM: no AT_MAC in after_auth "
|
|
"Notification message");
|
|
return -1;
|
|
}
|
|
|
|
if (eap_sim_verify_mac(data->k_aut, reqData, attr->mac, (u8 *) "", 0))
|
|
{
|
|
wpa_printf(MSG_WARNING, "EAP-SIM: Notification message "
|
|
"used invalid AT_MAC");
|
|
return -1;
|
|
}
|
|
|
|
if (data->reauth &&
|
|
eap_sim_process_notification_reauth(data, attr)) {
|
|
wpa_printf(MSG_WARNING, "EAP-SIM: Invalid notification "
|
|
"message after reauth");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct wpabuf * eap_sim_process_notification(
|
|
struct eap_sm *sm, struct eap_sim_data *data, u8 id,
|
|
const struct wpabuf *reqData, struct eap_sim_attrs *attr)
|
|
{
|
|
wpa_printf(MSG_DEBUG, "EAP-SIM: subtype Notification");
|
|
if (data->num_notification > 0) {
|
|
wpa_printf(MSG_INFO, "EAP-SIM: too many notification "
|
|
"rounds (only one allowed)");
|
|
return eap_sim_client_error(data, id,
|
|
EAP_SIM_UNABLE_TO_PROCESS_PACKET);
|
|
}
|
|
data->num_notification++;
|
|
if (attr->notification == -1) {
|
|
wpa_printf(MSG_INFO, "EAP-SIM: no AT_NOTIFICATION in "
|
|
"Notification message");
|
|
return eap_sim_client_error(data, id,
|
|
EAP_SIM_UNABLE_TO_PROCESS_PACKET);
|
|
}
|
|
|
|
if ((attr->notification & 0x4000) == 0 &&
|
|
eap_sim_process_notification_auth(data, reqData, attr)) {
|
|
return eap_sim_client_error(data, id,
|
|
EAP_SIM_UNABLE_TO_PROCESS_PACKET);
|
|
}
|
|
|
|
eap_sim_report_notification(sm->msg_ctx, attr->notification, 0);
|
|
if (attr->notification >= 0 && attr->notification < 32768) {
|
|
eap_sim_state(data, FAILURE);
|
|
} else if (attr->notification == EAP_SIM_SUCCESS &&
|
|
data->state == RESULT_SUCCESS)
|
|
eap_sim_state(data, SUCCESS);
|
|
return eap_sim_response_notification(data, id, attr->notification);
|
|
}
|
|
|
|
|
|
static struct wpabuf * eap_sim_process_reauthentication(
|
|
struct eap_sm *sm, struct eap_sim_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-SIM: subtype Reauthentication");
|
|
|
|
if (data->reauth_id == NULL) {
|
|
wpa_printf(MSG_WARNING, "EAP-SIM: Server is trying "
|
|
"reauthentication, but no reauth_id available");
|
|
return eap_sim_client_error(data, id,
|
|
EAP_SIM_UNABLE_TO_PROCESS_PACKET);
|
|
}
|
|
|
|
data->reauth = 1;
|
|
if (eap_sim_verify_mac(data->k_aut, reqData, attr->mac, (u8 *) "", 0))
|
|
{
|
|
wpa_printf(MSG_WARNING, "EAP-SIM: Reauthentication "
|
|
"did not have valid AT_MAC");
|
|
return eap_sim_client_error(data, id,
|
|
EAP_SIM_UNABLE_TO_PROCESS_PACKET);
|
|
}
|
|
|
|
if (attr->encr_data == NULL || attr->iv == NULL) {
|
|
wpa_printf(MSG_WARNING, "EAP-SIM: Reauthentication "
|
|
"message did not include encrypted data");
|
|
return eap_sim_client_error(data, id,
|
|
EAP_SIM_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-SIM: Failed to parse encrypted "
|
|
"data from reauthentication message");
|
|
return eap_sim_client_error(data, id,
|
|
EAP_SIM_UNABLE_TO_PROCESS_PACKET);
|
|
}
|
|
|
|
if (eattr.nonce_s == NULL || eattr.counter < 0) {
|
|
wpa_printf(MSG_INFO, "EAP-SIM: (encr) No%s%s in reauth packet",
|
|
!eattr.nonce_s ? " AT_NONCE_S" : "",
|
|
eattr.counter < 0 ? " AT_COUNTER" : "");
|
|
os_free(decrypted);
|
|
return eap_sim_client_error(data, id,
|
|
EAP_SIM_UNABLE_TO_PROCESS_PACKET);
|
|
}
|
|
|
|
if (eattr.counter < 0 || (size_t) eattr.counter <= data->counter) {
|
|
struct wpabuf *res;
|
|
wpa_printf(MSG_INFO, "EAP-SIM: (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_sim_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-SIM: (encr) AT_NONCE_S",
|
|
data->nonce_s, EAP_SIM_NONCE_S_LEN);
|
|
|
|
eap_sim_derive_keys_reauth(data->counter,
|
|
data->reauth_id, data->reauth_id_len,
|
|
data->nonce_s, data->mk, data->msk,
|
|
data->emsk);
|
|
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)
|
|
data->use_result_ind = 1;
|
|
|
|
if (data->state != FAILURE) {
|
|
eap_sim_state(data, data->use_result_ind ?
|
|
RESULT_SUCCESS : SUCCESS);
|
|
}
|
|
|
|
data->num_id_req = 0;
|
|
data->num_notification = 0;
|
|
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(sm, data,
|
|
CLEAR_REAUTH_ID | CLEAR_EAP_ID);
|
|
}
|
|
os_free(decrypted);
|
|
return eap_sim_response_reauth(data, id, 0, data->nonce_s);
|
|
}
|
|
|
|
|
|
static struct wpabuf * eap_sim_process(struct eap_sm *sm, void *priv,
|
|
struct eap_method_ret *ret,
|
|
const struct wpabuf *reqData)
|
|
{
|
|
struct eap_sim_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-SIM: EAP data", reqData);
|
|
if (eap_get_config_identity(sm, &len) == NULL) {
|
|
wpa_printf(MSG_INFO, "EAP-SIM: Identity not configured");
|
|
eap_sm_request_identity(sm);
|
|
ret->ignore = TRUE;
|
|
return NULL;
|
|
}
|
|
|
|
pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_SIM, reqData, &len);
|
|
if (pos == NULL || len < 3) {
|
|
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-SIM: Subtype=%d", subtype);
|
|
pos += 2; /* Reserved */
|
|
|
|
if (eap_sim_parse_attr(pos, wpabuf_head_u8(reqData) + len, &attr, 0,
|
|
0)) {
|
|
res = eap_sim_client_error(data, id,
|
|
EAP_SIM_UNABLE_TO_PROCESS_PACKET);
|
|
goto done;
|
|
}
|
|
|
|
switch (subtype) {
|
|
case EAP_SIM_SUBTYPE_START:
|
|
res = eap_sim_process_start(sm, data, id, &attr);
|
|
break;
|
|
case EAP_SIM_SUBTYPE_CHALLENGE:
|
|
res = eap_sim_process_challenge(sm, data, id, reqData, &attr);
|
|
break;
|
|
case EAP_SIM_SUBTYPE_NOTIFICATION:
|
|
res = eap_sim_process_notification(sm, data, id, reqData,
|
|
&attr);
|
|
break;
|
|
case EAP_SIM_SUBTYPE_REAUTHENTICATION:
|
|
res = eap_sim_process_reauthentication(sm, data, id, reqData,
|
|
&attr);
|
|
break;
|
|
case EAP_SIM_SUBTYPE_CLIENT_ERROR:
|
|
wpa_printf(MSG_DEBUG, "EAP-SIM: subtype Client-Error");
|
|
res = eap_sim_client_error(data, id,
|
|
EAP_SIM_UNABLE_TO_PROCESS_PACKET);
|
|
break;
|
|
default:
|
|
wpa_printf(MSG_DEBUG, "EAP-SIM: Unknown subtype=%d", subtype);
|
|
res = eap_sim_client_error(data, id,
|
|
EAP_SIM_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;
|
|
ret->methodState = data->use_result_ind ?
|
|
METHOD_DONE : METHOD_MAY_CONT;
|
|
} else if (data->state == RESULT_SUCCESS)
|
|
ret->methodState = METHOD_CONT;
|
|
|
|
if (ret->methodState == METHOD_DONE) {
|
|
ret->allowNotifications = FALSE;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
static Boolean eap_sim_has_reauth_data(struct eap_sm *sm, void *priv)
|
|
{
|
|
struct eap_sim_data *data = priv;
|
|
return data->pseudonym || data->reauth_id;
|
|
}
|
|
|
|
|
|
static void eap_sim_deinit_for_reauth(struct eap_sm *sm, void *priv)
|
|
{
|
|
struct eap_sim_data *data = priv;
|
|
eap_sim_clear_identities(sm, data, CLEAR_EAP_ID);
|
|
data->use_result_ind = 0;
|
|
eap_sim_clear_keys(data, 1);
|
|
}
|
|
|
|
|
|
static void * eap_sim_init_for_reauth(struct eap_sm *sm, void *priv)
|
|
{
|
|
struct eap_sim_data *data = priv;
|
|
if (random_get_bytes(data->nonce_mt, EAP_SIM_NONCE_MT_LEN)) {
|
|
wpa_printf(MSG_WARNING, "EAP-SIM: Failed to get random data "
|
|
"for NONCE_MT");
|
|
eap_sim_deinit(sm, data);
|
|
return NULL;
|
|
}
|
|
data->num_id_req = 0;
|
|
data->num_notification = 0;
|
|
eap_sim_state(data, CONTINUE);
|
|
return priv;
|
|
}
|
|
|
|
|
|
static const u8 * eap_sim_get_identity(struct eap_sm *sm, void *priv,
|
|
size_t *len)
|
|
{
|
|
struct eap_sim_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_sim_isKeyAvailable(struct eap_sm *sm, void *priv)
|
|
{
|
|
struct eap_sim_data *data = priv;
|
|
return data->state == SUCCESS;
|
|
}
|
|
|
|
|
|
static u8 * eap_sim_getKey(struct eap_sm *sm, void *priv, size_t *len)
|
|
{
|
|
struct eap_sim_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_sim_get_session_id(struct eap_sm *sm, void *priv, size_t *len)
|
|
{
|
|
struct eap_sim_data *data = priv;
|
|
u8 *id;
|
|
|
|
if (data->state != SUCCESS)
|
|
return NULL;
|
|
|
|
*len = 1 + data->num_chal * GSM_RAND_LEN + EAP_SIM_NONCE_MT_LEN;
|
|
id = os_malloc(*len);
|
|
if (id == NULL)
|
|
return NULL;
|
|
|
|
id[0] = EAP_TYPE_SIM;
|
|
os_memcpy(id + 1, data->rand, data->num_chal * GSM_RAND_LEN);
|
|
os_memcpy(id + 1 + data->num_chal * GSM_RAND_LEN, data->nonce_mt,
|
|
EAP_SIM_NONCE_MT_LEN);
|
|
wpa_hexdump(MSG_DEBUG, "EAP-SIM: Derived Session-Id", id, *len);
|
|
|
|
return id;
|
|
}
|
|
|
|
|
|
static u8 * eap_sim_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
|
|
{
|
|
struct eap_sim_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_sim_register(void)
|
|
{
|
|
struct eap_method *eap;
|
|
int ret;
|
|
|
|
eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
|
|
EAP_VENDOR_IETF, EAP_TYPE_SIM, "SIM");
|
|
if (eap == NULL)
|
|
return -1;
|
|
|
|
eap->init = eap_sim_init;
|
|
eap->deinit = eap_sim_deinit;
|
|
eap->process = eap_sim_process;
|
|
eap->isKeyAvailable = eap_sim_isKeyAvailable;
|
|
eap->getKey = eap_sim_getKey;
|
|
eap->getSessionId = eap_sim_get_session_id;
|
|
eap->has_reauth_data = eap_sim_has_reauth_data;
|
|
eap->deinit_for_reauth = eap_sim_deinit_for_reauth;
|
|
eap->init_for_reauth = eap_sim_init_for_reauth;
|
|
eap->get_identity = eap_sim_get_identity;
|
|
eap->get_emsk = eap_sim_get_emsk;
|
|
|
|
ret = eap_peer_method_register(eap);
|
|
if (ret)
|
|
eap_peer_method_free(eap);
|
|
return ret;
|
|
}
|