eap_aka.c revision c5ec7f57ead87efa365800228aa0b09a12d9e6c4
18d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* 28d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * EAP peer method: EAP-AKA (RFC 4187) and EAP-AKA' (draft-arkko-eap-aka-kdf) 38d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi> 48d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 5c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * This software may be distributed under the terms of the BSD license. 6c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * See README for more details. 78d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 88d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 98d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "includes.h" 108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "common.h" 128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "pcsc_funcs.h" 138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "crypto/crypto.h" 148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "crypto/sha1.h" 158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "crypto/sha256.h" 168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "crypto/milenage.h" 178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "eap_common/eap_sim_common.h" 188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "eap_config.h" 198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "eap_i.h" 208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstruct eap_aka_data { 238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 ik[EAP_AKA_IK_LEN], ck[EAP_AKA_CK_LEN], res[EAP_AKA_RES_MAX_LEN]; 248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t res_len; 258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 nonce_s[EAP_SIM_NONCE_S_LEN]; 268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 mk[EAP_SIM_MK_LEN]; 278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 k_aut[EAP_AKA_PRIME_K_AUT_LEN]; 288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 k_encr[EAP_SIM_K_ENCR_LEN]; 298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 k_re[EAP_AKA_PRIME_K_RE_LEN]; /* EAP-AKA' only */ 308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 msk[EAP_SIM_KEYING_DATA_LEN]; 318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 emsk[EAP_EMSK_LEN]; 328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 rand[EAP_AKA_RAND_LEN], autn[EAP_AKA_AUTN_LEN]; 338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 auts[EAP_AKA_AUTS_LEN]; 348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int num_id_req, num_notification; 368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *pseudonym; 378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t pseudonym_len; 388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *reauth_id; 398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t reauth_id_len; 408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int reauth; 418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt unsigned int counter, counter_too_small; 428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *last_eap_identity; 438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t last_eap_identity_len; 448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt enum { 458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt CONTINUE, RESULT_SUCCESS, RESULT_FAILURE, SUCCESS, FAILURE 468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } state; 478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf *id_msgs; 498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int prev_id; 508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int result_ind, use_result_ind; 518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 eap_method; 528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *network_name; 538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t network_name_len; 548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u16 kdf; 558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int kdf_negotiation; 568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt}; 578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifndef CONFIG_NO_STDOUT_DEBUG 608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic const char * eap_aka_state_txt(int state) 618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt switch (state) { 638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case CONTINUE: 648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return "CONTINUE"; 658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case RESULT_SUCCESS: 668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return "RESULT_SUCCESS"; 678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case RESULT_FAILURE: 688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return "RESULT_FAILURE"; 698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case SUCCESS: 708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return "SUCCESS"; 718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case FAILURE: 728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return "FAILURE"; 738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt default: 748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return "?"; 758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_NO_STDOUT_DEBUG */ 788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void eap_aka_state(struct eap_aka_data *data, int state) 818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA: %s -> %s", 838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_state_txt(data->state), 848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_state_txt(state)); 858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->state = state; 868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void * eap_aka_init(struct eap_sm *sm) 908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_aka_data *data; 928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const char *phase1 = eap_get_config_phase1(sm); 938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data = os_zalloc(sizeof(*data)); 958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data == NULL) 968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->eap_method = EAP_TYPE_AKA; 998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_state(data, CONTINUE); 1018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->prev_id = -1; 1028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->result_ind = phase1 && os_strstr(phase1, "result_ind=1") != NULL; 1048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return data; 1068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef EAP_AKA_PRIME 1108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void * eap_aka_prime_init(struct eap_sm *sm) 1118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_aka_data *data = eap_aka_init(sm); 1138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data == NULL) 1148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 1158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->eap_method = EAP_TYPE_AKA_PRIME; 1168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return data; 1178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* EAP_AKA_PRIME */ 1198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void eap_aka_deinit(struct eap_sm *sm, void *priv) 1228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_aka_data *data = priv; 1248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data) { 1258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data->pseudonym); 1268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data->reauth_id); 1278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data->last_eap_identity); 1288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_free(data->id_msgs); 1298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data->network_name); 1308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data); 1318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic int eap_aka_umts_auth(struct eap_sm *sm, struct eap_aka_data *data) 1368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_peer_config *conf; 1388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA: UMTS authentication algorithm"); 1408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt conf = eap_get_config(sm); 1428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (conf == NULL) 1438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 1448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (conf->pcsc) { 1458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return scard_umts_auth(sm->scard_ctx, data->rand, 1468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->autn, data->res, &data->res_len, 1478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->ik, data->ck, data->auts); 1488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef CONFIG_USIM_SIMULATOR 1518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (conf->password) { 1528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 opc[16], k[16], sqn[6]; 1538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const char *pos; 1548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA: Use internal Milenage " 1558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "implementation for UMTS authentication"); 1568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (conf->password_len < 78) { 1578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA: invalid Milenage " 1588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "password"); 1598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 1608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pos = (const char *) conf->password; 1628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (hexstr2bin(pos, k, 16)) 1638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 1648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pos += 32; 1658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (*pos != ':') 1668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 1678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pos++; 1688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (hexstr2bin(pos, opc, 16)) 1708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 1718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pos += 32; 1728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (*pos != ':') 1738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 1748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pos++; 1758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (hexstr2bin(pos, sqn, 6)) 1778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 1788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return milenage_check(opc, k, sqn, data->rand, data->autn, 1808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->ik, data->ck, 1818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->res, &data->res_len, data->auts); 1828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_USIM_SIMULATOR */ 1848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef CONFIG_USIM_HARDCODED 1868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA: Use hardcoded Kc and SRES values for " 1878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "testing"); 1888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* These hardcoded Kc and SRES values are used for testing. 1908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Could consider making them configurable. */ 1918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(data->res, '2', EAP_AKA_RES_MAX_LEN); 1928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->res_len = EAP_AKA_RES_MAX_LEN; 1938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(data->ik, '3', EAP_AKA_IK_LEN); 1948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(data->ck, '4', EAP_AKA_CK_LEN); 1958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt { 1968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 autn[EAP_AKA_AUTN_LEN]; 1978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(autn, '1', EAP_AKA_AUTN_LEN); 1988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (os_memcmp(autn, data->autn, EAP_AKA_AUTN_LEN) != 0) { 1998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA: AUTN did not match " 2008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "with expected value"); 2018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 2028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#if 0 2058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt { 2068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt static int test_resync = 1; 2078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (test_resync) { 2088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* Test Resynchronization */ 2098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt test_resync = 0; 2108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -2; 2118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif 2148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 2158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#else /* CONFIG_USIM_HARDCODED */ 2178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA: No UMTS authentication algorith " 2198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "enabled"); 2208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 2218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* CONFIG_USIM_HARDCODED */ 2238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 2248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define CLEAR_PSEUDONYM 0x01 2278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define CLEAR_REAUTH_ID 0x02 2288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define CLEAR_EAP_ID 0x04 2298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void eap_aka_clear_identities(struct eap_aka_data *data, int id) 2318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 2328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (id & CLEAR_PSEUDONYM) { 2331f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA: forgetting old pseudonym"); 2348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data->pseudonym); 2358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->pseudonym = NULL; 2368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->pseudonym_len = 0; 2378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (id & CLEAR_REAUTH_ID) { 2391f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA: forgetting old reauth_id"); 2408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data->reauth_id); 2418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->reauth_id = NULL; 2428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->reauth_id_len = 0; 2438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (id & CLEAR_EAP_ID) { 2451f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA: forgetting old eap_id"); 2468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data->last_eap_identity); 2478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->last_eap_identity = NULL; 2488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->last_eap_identity_len = 0; 2498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 2518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 253c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidtstatic int eap_aka_learn_ids(struct eap_sm *sm, struct eap_aka_data *data, 2548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sim_attrs *attr) 2558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 2568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (attr->next_pseudonym) { 257c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt const u8 *identity = NULL; 258c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt size_t identity_len = 0; 259c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt const u8 *realm = NULL; 260c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt size_t realm_len = 0; 261c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt 262c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt wpa_hexdump_ascii(MSG_DEBUG, 263c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt "EAP-AKA: (encr) AT_NEXT_PSEUDONYM", 264c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt attr->next_pseudonym, 265c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt attr->next_pseudonym_len); 2668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data->pseudonym); 267c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt /* Look for the realm of the permanent identity */ 268c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt identity = eap_get_config_identity(sm, &identity_len); 269c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (identity) { 270c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt for (realm = identity, realm_len = identity_len; 271c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt realm_len > 0; realm_len--, realm++) { 272c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (*realm == '@') 273c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt break; 274c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt } 275c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt } 276c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt data->pseudonym = os_malloc(attr->next_pseudonym_len + 277c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt realm_len); 2788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->pseudonym == NULL) { 2798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-AKA: (encr) No memory for " 2808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "next pseudonym"); 281c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt data->pseudonym_len = 0; 2828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 2838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(data->pseudonym, attr->next_pseudonym, 2858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt attr->next_pseudonym_len); 286c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt if (realm_len) { 287c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt os_memcpy(data->pseudonym + attr->next_pseudonym_len, 288c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt realm, realm_len); 289c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt } 290c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt data->pseudonym_len = attr->next_pseudonym_len + realm_len; 2918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (attr->next_reauth_id) { 2948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data->reauth_id); 2958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->reauth_id = os_malloc(attr->next_reauth_id_len); 2968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->reauth_id == NULL) { 2978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-AKA: (encr) No memory for " 2988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "next reauth_id"); 299c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt data->reauth_id_len = 0; 3008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 3018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(data->reauth_id, attr->next_reauth_id, 3038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt attr->next_reauth_id_len); 3048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->reauth_id_len = attr->next_reauth_id_len; 3058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_hexdump_ascii(MSG_DEBUG, 3068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "EAP-AKA: (encr) AT_NEXT_REAUTH_ID", 3078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->reauth_id, 3088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->reauth_id_len); 3098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 3128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 3138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic int eap_aka_add_id_msg(struct eap_aka_data *data, 3168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct wpabuf *msg) 3178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 3188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (msg == NULL) 3198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 3208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->id_msgs == NULL) { 3228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->id_msgs = wpabuf_dup(msg); 3238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return data->id_msgs == NULL ? -1 : 0; 3248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (wpabuf_resize(&data->id_msgs, wpabuf_len(msg)) < 0) 3278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 3288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_put_buf(data->id_msgs, msg); 3298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 3318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 3328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void eap_aka_add_checkcode(struct eap_aka_data *data, 3358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sim_msg *msg) 3368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 3378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *addr; 3388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t len; 3398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 hash[SHA256_MAC_LEN]; 3408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, " AT_CHECKCODE"); 3428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->id_msgs == NULL) { 3448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* 3458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * No EAP-AKA/Identity packets were exchanged - send empty 3468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * checkcode. 3478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 3488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_msg_add(msg, EAP_SIM_AT_CHECKCODE, 0, NULL, 0); 3498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 3508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* Checkcode is SHA1/SHA256 hash over all EAP-AKA/Identity packets. */ 3538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt addr = wpabuf_head(data->id_msgs); 3548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt len = wpabuf_len(data->id_msgs); 3558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_hexdump(MSG_MSGDUMP, "EAP-AKA: AT_CHECKCODE data", addr, len); 3568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef EAP_AKA_PRIME 3578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->eap_method == EAP_TYPE_AKA_PRIME) 3588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sha256_vector(1, &addr, &len, hash); 3598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt else 3608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* EAP_AKA_PRIME */ 3618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sha1_vector(1, &addr, &len, hash); 3628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_msg_add(msg, EAP_SIM_AT_CHECKCODE, 0, hash, 3648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->eap_method == EAP_TYPE_AKA_PRIME ? 3658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_PRIME_CHECKCODE_LEN : EAP_AKA_CHECKCODE_LEN); 3668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 3678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic int eap_aka_verify_checkcode(struct eap_aka_data *data, 3708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *checkcode, size_t checkcode_len) 3718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 3728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *addr; 3738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t len; 3748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 hash[SHA256_MAC_LEN]; 3758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t hash_len; 3768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (checkcode == NULL) 3788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 3798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->id_msgs == NULL) { 3818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (checkcode_len != 0) { 3828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA: Checkcode from server " 3838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "indicates that AKA/Identity messages were " 3848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "used, but they were not"); 3858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 3868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 3888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt hash_len = data->eap_method == EAP_TYPE_AKA_PRIME ? 3918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_PRIME_CHECKCODE_LEN : EAP_AKA_CHECKCODE_LEN; 3928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (checkcode_len != hash_len) { 3948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA: Checkcode from server " 3958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "indicates that AKA/Identity message were not " 3968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "used, but they were"); 3978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 3988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* Checkcode is SHA1/SHA256 hash over all EAP-AKA/Identity packets. */ 4018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt addr = wpabuf_head(data->id_msgs); 4028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt len = wpabuf_len(data->id_msgs); 4038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef EAP_AKA_PRIME 4048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->eap_method == EAP_TYPE_AKA_PRIME) 4058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sha256_vector(1, &addr, &len, hash); 4068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt else 4078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* EAP_AKA_PRIME */ 4088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sha1_vector(1, &addr, &len, hash); 4098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (os_memcmp(hash, checkcode, hash_len) != 0) { 4118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA: Mismatch in AT_CHECKCODE"); 4128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 4138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 4148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 4168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 4178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * eap_aka_client_error(struct eap_aka_data *data, u8 id, 4208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int err) 4218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 4228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sim_msg *msg; 4238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_state(data, FAILURE); 4258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->num_id_req = 0; 4268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->num_notification = 0; 4278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, data->eap_method, 4298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_SUBTYPE_CLIENT_ERROR); 4308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_msg_add(msg, EAP_SIM_AT_CLIENT_ERROR_CODE, err, NULL, 0); 4318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_sim_msg_finish(msg, NULL, NULL, 0); 4328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 4338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * eap_aka_authentication_reject(struct eap_aka_data *data, 4368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 id) 4378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 4388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sim_msg *msg; 4398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_state(data, FAILURE); 4418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->num_id_req = 0; 4428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->num_notification = 0; 4438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "Generating EAP-AKA Authentication-Reject " 4458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "(id=%d)", id); 4468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, data->eap_method, 4478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_SUBTYPE_AUTHENTICATION_REJECT); 4488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_sim_msg_finish(msg, NULL, NULL, 0); 4498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 4508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * eap_aka_synchronization_failure( 4538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_aka_data *data, u8 id) 4548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 4558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sim_msg *msg; 4568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->num_id_req = 0; 4588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->num_notification = 0; 4598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "Generating EAP-AKA Synchronization-Failure " 4618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "(id=%d)", id); 4628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, data->eap_method, 4638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_SUBTYPE_SYNCHRONIZATION_FAILURE); 4648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, " AT_AUTS"); 4658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_msg_add_full(msg, EAP_SIM_AT_AUTS, data->auts, 4668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_AUTS_LEN); 4678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_sim_msg_finish(msg, NULL, NULL, 0); 4688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 4698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * eap_aka_response_identity(struct eap_sm *sm, 4728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_aka_data *data, 4738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 id, 4748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt enum eap_sim_id_req id_req) 4758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 4768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *identity = NULL; 4778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t identity_len = 0; 4788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sim_msg *msg; 4798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->reauth = 0; 4818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (id_req == ANY_ID && data->reauth_id) { 4828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt identity = data->reauth_id; 4838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt identity_len = data->reauth_id_len; 4848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->reauth = 1; 4858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else if ((id_req == ANY_ID || id_req == FULLAUTH_ID) && 4868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->pseudonym) { 4878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt identity = data->pseudonym; 4888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt identity_len = data->pseudonym_len; 4898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_clear_identities(data, CLEAR_REAUTH_ID); 4908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else if (id_req != NO_ID_REQ) { 4918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt identity = eap_get_config_identity(sm, &identity_len); 4928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (identity) { 4938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_clear_identities(data, CLEAR_PSEUDONYM | 4948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt CLEAR_REAUTH_ID); 4958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 4968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 4978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (id_req != NO_ID_REQ) 4988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_clear_identities(data, CLEAR_EAP_ID); 4998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "Generating EAP-AKA Identity (id=%d)", id); 5018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, data->eap_method, 5028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_SUBTYPE_IDENTITY); 5038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (identity) { 5058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_hexdump_ascii(MSG_DEBUG, " AT_IDENTITY", 5068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt identity, identity_len); 5078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_msg_add(msg, EAP_SIM_AT_IDENTITY, identity_len, 5088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt identity, identity_len); 5098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 5108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_sim_msg_finish(msg, NULL, NULL, 0); 5128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 5138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * eap_aka_response_challenge(struct eap_aka_data *data, 5168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 id) 5178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 5188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sim_msg *msg; 5198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "Generating EAP-AKA Challenge (id=%d)", id); 5218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, data->eap_method, 5228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_SUBTYPE_CHALLENGE); 5238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, " AT_RES"); 5248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_msg_add(msg, EAP_SIM_AT_RES, data->res_len * 8, 5258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->res, data->res_len); 5268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_add_checkcode(data, msg); 5278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->use_result_ind) { 5288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, " AT_RESULT_IND"); 5298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_msg_add(msg, EAP_SIM_AT_RESULT_IND, 0, NULL, 0); 5308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 5318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, " AT_MAC"); 5328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_msg_add_mac(msg, EAP_SIM_AT_MAC); 5338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_sim_msg_finish(msg, data->k_aut, (u8 *) "", 0); 5348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 5358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * eap_aka_response_reauth(struct eap_aka_data *data, 5388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 id, int counter_too_small, 5398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *nonce_s) 5408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 5418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sim_msg *msg; 5428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt unsigned int counter; 5438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "Generating EAP-AKA Reauthentication (id=%d)", 5458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt id); 5468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, data->eap_method, 5478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_SUBTYPE_REAUTHENTICATION); 5488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, " AT_IV"); 5498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, " AT_ENCR_DATA"); 5508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_msg_add_encr_start(msg, EAP_SIM_AT_IV, EAP_SIM_AT_ENCR_DATA); 5518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (counter_too_small) { 5538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, " *AT_COUNTER_TOO_SMALL"); 5548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_msg_add(msg, EAP_SIM_AT_COUNTER_TOO_SMALL, 0, NULL, 0); 5558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt counter = data->counter_too_small; 5568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else 5578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt counter = data->counter; 5588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, " *AT_COUNTER %d", counter); 5608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_msg_add(msg, EAP_SIM_AT_COUNTER, counter, NULL, 0); 5618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eap_sim_msg_add_encr_end(msg, data->k_encr, EAP_SIM_AT_PADDING)) { 5638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA: Failed to encrypt " 5648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "AT_ENCR_DATA"); 5658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_msg_free(msg); 5668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 5678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 5688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_add_checkcode(data, msg); 5698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->use_result_ind) { 5708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, " AT_RESULT_IND"); 5718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_msg_add(msg, EAP_SIM_AT_RESULT_IND, 0, NULL, 0); 5728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 5738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, " AT_MAC"); 5748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_msg_add_mac(msg, EAP_SIM_AT_MAC); 5758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_sim_msg_finish(msg, data->k_aut, nonce_s, 5768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_SIM_NONCE_S_LEN); 5778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 5788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * eap_aka_response_notification(struct eap_aka_data *data, 5818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 id, u16 notification) 5828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 5838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sim_msg *msg; 5848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *k_aut = (notification & 0x4000) == 0 ? data->k_aut : NULL; 5858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "Generating EAP-AKA Notification (id=%d)", id); 5878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, data->eap_method, 5888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_SUBTYPE_NOTIFICATION); 5898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (k_aut && data->reauth) { 5908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, " AT_IV"); 5918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, " AT_ENCR_DATA"); 5928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_msg_add_encr_start(msg, EAP_SIM_AT_IV, 5938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_SIM_AT_ENCR_DATA); 5948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, " *AT_COUNTER %d", data->counter); 5958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_msg_add(msg, EAP_SIM_AT_COUNTER, data->counter, 5968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt NULL, 0); 5978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eap_sim_msg_add_encr_end(msg, data->k_encr, 5988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_SIM_AT_PADDING)) { 5998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA: Failed to encrypt " 6008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "AT_ENCR_DATA"); 6018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_msg_free(msg); 6028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 6038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 6048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 6058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (k_aut) { 6068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, " AT_MAC"); 6078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_msg_add_mac(msg, EAP_SIM_AT_MAC); 6088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 6098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_sim_msg_finish(msg, k_aut, (u8 *) "", 0); 6108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 6118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * eap_aka_process_identity(struct eap_sm *sm, 6148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_aka_data *data, 6158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 id, 6168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct wpabuf *reqData, 6178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sim_attrs *attr) 6188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 6198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int id_error; 6208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf *buf; 6218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA: subtype Identity"); 6238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt id_error = 0; 6258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt switch (attr->id_req) { 6268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case NO_ID_REQ: 6278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 6288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case ANY_ID: 6298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->num_id_req > 0) 6308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt id_error++; 6318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->num_id_req++; 6328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 6338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case FULLAUTH_ID: 6348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->num_id_req > 1) 6358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt id_error++; 6368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->num_id_req++; 6378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 6388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case PERMANENT_ID: 6398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->num_id_req > 2) 6408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt id_error++; 6418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->num_id_req++; 6428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 6438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 6448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (id_error) { 6458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-AKA: Too many ID requests " 6468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "used within one authentication"); 6478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_client_error(data, id, 6488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_UNABLE_TO_PROCESS_PACKET); 6498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 6508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt buf = eap_aka_response_identity(sm, data, id, attr->id_req); 6528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->prev_id != id) { 6548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_add_id_msg(data, reqData); 6558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_add_id_msg(data, buf); 6568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->prev_id = id; 6578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 6588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return buf; 6608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 6618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic int eap_aka_verify_mac(struct eap_aka_data *data, 6648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct wpabuf *req, 6658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *mac, const u8 *extra, 6668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t extra_len) 6678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 6688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->eap_method == EAP_TYPE_AKA_PRIME) 6698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_sim_verify_mac_sha256(data->k_aut, req, mac, extra, 6708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt extra_len); 6718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_sim_verify_mac(data->k_aut, req, mac, extra, extra_len); 6728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 6738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef EAP_AKA_PRIME 6768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * eap_aka_prime_kdf_select(struct eap_aka_data *data, 6778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 id, u16 kdf) 6788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 6798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sim_msg *msg; 6808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->kdf_negotiation = 1; 6828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->kdf = kdf; 6838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "Generating EAP-AKA Challenge (id=%d) (KDF " 6848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "select)", id); 6858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt msg = eap_sim_msg_init(EAP_CODE_RESPONSE, id, data->eap_method, 6868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_SUBTYPE_CHALLENGE); 6878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, " AT_KDF"); 6888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_msg_add(msg, EAP_SIM_AT_KDF, kdf, NULL, 0); 6898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_sim_msg_finish(msg, NULL, NULL, 0); 6908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 6918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * eap_aka_prime_kdf_neg(struct eap_aka_data *data, 6948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 id, struct eap_sim_attrs *attr) 6958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 6968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t i; 6978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 6988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt for (i = 0; i < attr->kdf_count; i++) { 6998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (attr->kdf[i] == EAP_AKA_PRIME_KDF) 7008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_prime_kdf_select(data, id, 7018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_PRIME_KDF); 7028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 7038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* No matching KDF found - fail authentication as if AUTN had been 7058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * incorrect */ 7068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_authentication_reject(data, id); 7078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 7088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic int eap_aka_prime_kdf_valid(struct eap_aka_data *data, 7118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sim_attrs *attr) 7128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 7138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t i, j; 7148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (attr->kdf_count == 0) 7168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 7178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* The only allowed (and required) duplication of a KDF is the addition 7198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * of the selected KDF into the beginning of the list. */ 7208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->kdf_negotiation) { 7228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (attr->kdf[0] != data->kdf) { 7238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA': The server did not " 7248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "accept the selected KDF"); 7258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 7268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 7278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt for (i = 1; i < attr->kdf_count; i++) { 7298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (attr->kdf[i] == data->kdf) 7308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 7318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 7328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (i == attr->kdf_count && 7338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt attr->kdf_count < EAP_AKA_PRIME_KDF_MAX) { 7348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA': The server did not " 7358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "duplicate the selected KDF"); 7368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 7378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 7388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* TODO: should check that the list is identical to the one 7408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * used in the previous Challenge message apart from the added 7418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * entry in the beginning. */ 7428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 7438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt for (i = data->kdf ? 1 : 0; i < attr->kdf_count; i++) { 7458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt for (j = i + 1; j < attr->kdf_count; j++) { 7468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (attr->kdf[i] == attr->kdf[j]) { 7478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA': The server " 7488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "included a duplicated KDF"); 7498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 7508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 7518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 7528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 7538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 1; 7558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 7568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* EAP_AKA_PRIME */ 7578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * eap_aka_process_challenge(struct eap_sm *sm, 7608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_aka_data *data, 7618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 id, 7628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct wpabuf *reqData, 7638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sim_attrs *attr) 7648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 7658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *identity; 7668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t identity_len; 7678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int res; 7688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sim_attrs eattr; 7698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA: subtype Challenge"); 7718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (attr->checkcode && 7738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_verify_checkcode(data, attr->checkcode, 7748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt attr->checkcode_len)) { 7758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA: Invalid AT_CHECKCODE in the " 7768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "message"); 7778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_client_error(data, id, 7788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_UNABLE_TO_PROCESS_PACKET); 7798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 7808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 7818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef EAP_AKA_PRIME 7828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->eap_method == EAP_TYPE_AKA_PRIME) { 7838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!attr->kdf_input || attr->kdf_input_len == 0) { 7848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA': Challenge message " 7858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "did not include non-empty AT_KDF_INPUT"); 7868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* Fail authentication as if AUTN had been incorrect */ 7878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_authentication_reject(data, id); 7888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 7898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data->network_name); 7908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->network_name = os_malloc(attr->kdf_input_len); 7918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->network_name == NULL) { 7928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA': No memory for " 7938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "storing Network Name"); 7948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_authentication_reject(data, id); 7958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 7968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(data->network_name, attr->kdf_input, 7978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt attr->kdf_input_len); 7988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->network_name_len = attr->kdf_input_len; 7998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_hexdump_ascii(MSG_DEBUG, "EAP-AKA': Network Name " 8008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "(AT_KDF_INPUT)", 8018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->network_name, data->network_name_len); 8028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* TODO: check Network Name per 3GPP.33.402 */ 8038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 8048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!eap_aka_prime_kdf_valid(data, attr)) 8058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_authentication_reject(data, id); 8068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 8078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (attr->kdf[0] != EAP_AKA_PRIME_KDF) 8088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_prime_kdf_neg(data, id, attr); 8098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 8108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->kdf = EAP_AKA_PRIME_KDF; 8118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA': KDF %d selected", data->kdf); 8128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 8138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 8148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->eap_method == EAP_TYPE_AKA && attr->bidding) { 8158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u16 flags = WPA_GET_BE16(attr->bidding); 8168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if ((flags & EAP_AKA_BIDDING_FLAG_D) && 8178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_allowed_method(sm, EAP_VENDOR_IETF, 8188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_TYPE_AKA_PRIME)) { 8198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA: Bidding down from " 8208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "AKA' to AKA detected"); 8218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* Fail authentication as if AUTN had been incorrect */ 8228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_authentication_reject(data, id); 8238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 8248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 8258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* EAP_AKA_PRIME */ 8268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 8278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->reauth = 0; 8288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!attr->mac || !attr->rand || !attr->autn) { 8298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA: Challenge message " 8308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "did not include%s%s%s", 8318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt !attr->mac ? " AT_MAC" : "", 8328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt !attr->rand ? " AT_RAND" : "", 8338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt !attr->autn ? " AT_AUTN" : ""); 8348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_client_error(data, id, 8358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_UNABLE_TO_PROCESS_PACKET); 8368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 8378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(data->rand, attr->rand, EAP_AKA_RAND_LEN); 8388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(data->autn, attr->autn, EAP_AKA_AUTN_LEN); 8398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 8408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt res = eap_aka_umts_auth(sm, data); 8418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (res == -1) { 8428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA: UMTS authentication " 8438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "failed (AUTN)"); 8448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_authentication_reject(data, id); 8458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else if (res == -2) { 8468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA: UMTS authentication " 8478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "failed (AUTN seq# -> AUTS)"); 8488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_synchronization_failure(data, id); 8498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else if (res) { 8508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA: UMTS authentication failed"); 8518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_client_error(data, id, 8528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_UNABLE_TO_PROCESS_PACKET); 8538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 8548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef EAP_AKA_PRIME 8558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->eap_method == EAP_TYPE_AKA_PRIME) { 8568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* Note: AUTN = (SQN ^ AK) || AMF || MAC which gives us the 8578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * needed 6-octet SQN ^ AK for CK',IK' derivation */ 8588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u16 amf = WPA_GET_BE16(data->autn + 6); 8598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!(amf & 0x8000)) { 8608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA': AMF separation bit " 8618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "not set (AMF=0x%4x)", amf); 8628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_authentication_reject(data, id); 8638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 8648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_prime_derive_ck_ik_prime(data->ck, data->ik, 8658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->autn, 8668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->network_name, 8678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->network_name_len); 8688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 8698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* EAP_AKA_PRIME */ 8708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->last_eap_identity) { 8718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt identity = data->last_eap_identity; 8728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt identity_len = data->last_eap_identity_len; 8738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else if (data->pseudonym) { 8748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt identity = data->pseudonym; 8758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt identity_len = data->pseudonym_len; 8768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else 8778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt identity = eap_get_config_identity(sm, &identity_len); 8788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_hexdump_ascii(MSG_DEBUG, "EAP-AKA: Selected identity for MK " 8798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "derivation", identity, identity_len); 8808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->eap_method == EAP_TYPE_AKA_PRIME) { 8818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_prime_derive_keys(identity, identity_len, data->ik, 8828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->ck, data->k_encr, data->k_aut, 8838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->k_re, data->msk, data->emsk); 8848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else { 8858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_derive_mk(identity, identity_len, data->ik, data->ck, 8868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->mk); 8878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_derive_keys(data->mk, data->k_encr, data->k_aut, 8888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->msk, data->emsk); 8898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 8908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eap_aka_verify_mac(data, reqData, attr->mac, (u8 *) "", 0)) { 8918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA: Challenge message " 8928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "used invalid AT_MAC"); 8938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_client_error(data, id, 8948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_UNABLE_TO_PROCESS_PACKET); 8958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 8968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 8971f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt /* Old reauthentication identity must not be used anymore. In 8981f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt * other words, if no new identities are received, full 8991f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt * authentication will be used on next reauthentication (using 9001f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt * pseudonym identity or permanent identity). */ 9011f69aa52ea2e0a73ac502565df8c666ee49cab6aDmitry Shmidt eap_aka_clear_identities(data, CLEAR_REAUTH_ID | CLEAR_EAP_ID); 9028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (attr->encr_data) { 9048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *decrypted; 9058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt decrypted = eap_sim_parse_encr(data->k_encr, attr->encr_data, 9068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt attr->encr_data_len, attr->iv, 9078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt &eattr, 0); 9088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (decrypted == NULL) { 9098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_client_error( 9108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data, id, EAP_AKA_UNABLE_TO_PROCESS_PACKET); 9118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 912c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt eap_aka_learn_ids(sm, data, &eattr); 9138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(decrypted); 9148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 9158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->result_ind && attr->result_ind) 9178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->use_result_ind = 1; 9188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->state != FAILURE && data->state != RESULT_FAILURE) { 9208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_state(data, data->use_result_ind ? 9218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt RESULT_SUCCESS : SUCCESS); 9228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 9238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->num_id_req = 0; 9258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->num_notification = 0; 9268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* RFC 4187 specifies that counter is initialized to one after 9278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * fullauth, but initializing it to zero makes it easier to implement 9288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * reauth verification. */ 9298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->counter = 0; 9308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_response_challenge(data, id); 9318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 9328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic int eap_aka_process_notification_reauth(struct eap_aka_data *data, 9358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sim_attrs *attr) 9368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 9378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sim_attrs eattr; 9388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *decrypted; 9398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (attr->encr_data == NULL || attr->iv == NULL) { 9418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA: Notification message after " 9428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "reauth did not include encrypted data"); 9438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 9448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 9458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt decrypted = eap_sim_parse_encr(data->k_encr, attr->encr_data, 9478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt attr->encr_data_len, attr->iv, &eattr, 9488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 0); 9498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (decrypted == NULL) { 9508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA: Failed to parse encrypted " 9518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "data from notification message"); 9528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 9538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 9548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eattr.counter < 0 || (size_t) eattr.counter != data->counter) { 9568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA: Counter in notification " 9578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "message does not match with counter in reauth " 9588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "message"); 9598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(decrypted); 9608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 9618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 9628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(decrypted); 9648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 9658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 9668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic int eap_aka_process_notification_auth(struct eap_aka_data *data, 9698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct wpabuf *reqData, 9708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sim_attrs *attr) 9718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 9728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (attr->mac == NULL) { 9738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-AKA: no AT_MAC in after_auth " 9748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "Notification message"); 9758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 9768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 9778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eap_aka_verify_mac(data, reqData, attr->mac, (u8 *) "", 0)) { 9798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA: Notification message " 9808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "used invalid AT_MAC"); 9818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 9828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 9838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->reauth && 9858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_process_notification_reauth(data, attr)) { 9868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA: Invalid notification " 9878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "message after reauth"); 9888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 9898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 9908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 9928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 9938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 9958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * eap_aka_process_notification( 9968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sm *sm, struct eap_aka_data *data, u8 id, 9978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct wpabuf *reqData, struct eap_sim_attrs *attr) 9988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 9998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA: subtype Notification"); 10008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->num_notification > 0) { 10018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-AKA: too many notification " 10028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "rounds (only one allowed)"); 10038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_client_error(data, id, 10048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_UNABLE_TO_PROCESS_PACKET); 10058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 10068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->num_notification++; 10078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (attr->notification == -1) { 10088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-AKA: no AT_NOTIFICATION in " 10098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "Notification message"); 10108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_client_error(data, id, 10118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_UNABLE_TO_PROCESS_PACKET); 10128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 10138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if ((attr->notification & 0x4000) == 0 && 10158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_process_notification_auth(data, reqData, attr)) { 10168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_client_error(data, id, 10178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_UNABLE_TO_PROCESS_PACKET); 10188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 10198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_report_notification(sm->msg_ctx, attr->notification, 1); 10218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (attr->notification >= 0 && attr->notification < 32768) { 10228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_state(data, FAILURE); 10238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else if (attr->notification == EAP_SIM_SUCCESS && 10248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->state == RESULT_SUCCESS) 10258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_state(data, SUCCESS); 10268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_response_notification(data, id, attr->notification); 10278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 10288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * eap_aka_process_reauthentication( 10318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sm *sm, struct eap_aka_data *data, u8 id, 10328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct wpabuf *reqData, struct eap_sim_attrs *attr) 10338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 10348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sim_attrs eattr; 10358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *decrypted; 10368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA: subtype Reauthentication"); 10388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (attr->checkcode && 10408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_verify_checkcode(data, attr->checkcode, 10418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt attr->checkcode_len)) { 10428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA: Invalid AT_CHECKCODE in the " 10438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "message"); 10448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_client_error(data, id, 10458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_UNABLE_TO_PROCESS_PACKET); 10468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 10478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->reauth_id == NULL) { 10498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA: Server is trying " 10508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "reauthentication, but no reauth_id available"); 10518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_client_error(data, id, 10528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_UNABLE_TO_PROCESS_PACKET); 10538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 10548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->reauth = 1; 10568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eap_aka_verify_mac(data, reqData, attr->mac, (u8 *) "", 0)) { 10578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA: Reauthentication " 10588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "did not have valid AT_MAC"); 10598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_client_error(data, id, 10608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_UNABLE_TO_PROCESS_PACKET); 10618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 10628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (attr->encr_data == NULL || attr->iv == NULL) { 10648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA: Reauthentication " 10658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "message did not include encrypted data"); 10668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_client_error(data, id, 10678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_UNABLE_TO_PROCESS_PACKET); 10688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 10698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt decrypted = eap_sim_parse_encr(data->k_encr, attr->encr_data, 10718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt attr->encr_data_len, attr->iv, &eattr, 10728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 0); 10738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (decrypted == NULL) { 10748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_WARNING, "EAP-AKA: Failed to parse encrypted " 10758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "data from reauthentication message"); 10768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_client_error(data, id, 10778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_UNABLE_TO_PROCESS_PACKET); 10788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 10798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eattr.nonce_s == NULL || eattr.counter < 0) { 10818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-AKA: (encr) No%s%s in reauth packet", 10828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt !eattr.nonce_s ? " AT_NONCE_S" : "", 10838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eattr.counter < 0 ? " AT_COUNTER" : ""); 10848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(decrypted); 10858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_client_error(data, id, 10868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_UNABLE_TO_PROCESS_PACKET); 10878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 10888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eattr.counter < 0 || (size_t) eattr.counter <= data->counter) { 10908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf *res; 10918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-AKA: (encr) Invalid counter " 10928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "(%d <= %d)", eattr.counter, data->counter); 10938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->counter_too_small = eattr.counter; 10948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 10958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* Reply using Re-auth w/ AT_COUNTER_TOO_SMALL. The current 10968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * reauth_id must not be used to start a new reauthentication. 10978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * However, since it was used in the last EAP-Response-Identity 10988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * packet, it has to saved for the following fullauth to be 10998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * used in MK derivation. */ 11008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data->last_eap_identity); 11018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->last_eap_identity = data->reauth_id; 11028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->last_eap_identity_len = data->reauth_id_len; 11038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->reauth_id = NULL; 11048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->reauth_id_len = 0; 11058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 11068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt res = eap_aka_response_reauth(data, id, 1, eattr.nonce_s); 11078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(decrypted); 11088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 11098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return res; 11108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 11118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->counter = eattr.counter; 11128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 11138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(data->nonce_s, eattr.nonce_s, EAP_SIM_NONCE_S_LEN); 11148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_hexdump(MSG_DEBUG, "EAP-AKA: (encr) AT_NONCE_S", 11158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->nonce_s, EAP_SIM_NONCE_S_LEN); 11168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 11178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->eap_method == EAP_TYPE_AKA_PRIME) { 11188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_prime_derive_keys_reauth(data->k_re, data->counter, 11198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->reauth_id, 11208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->reauth_id_len, 11218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->nonce_s, 11228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->msk, data->emsk); 11238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else { 11248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sim_derive_keys_reauth(data->counter, data->reauth_id, 11258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->reauth_id_len, 11268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->nonce_s, data->mk, 11278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->msk, data->emsk); 11288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 11298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_clear_identities(data, CLEAR_REAUTH_ID | CLEAR_EAP_ID); 1130c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt eap_aka_learn_ids(sm, data, &eattr); 11318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 11328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->result_ind && attr->result_ind) 11338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->use_result_ind = 1; 11348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 11358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->state != FAILURE && data->state != RESULT_FAILURE) { 11368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_state(data, data->use_result_ind ? 11378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt RESULT_SUCCESS : SUCCESS); 11388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 11398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 11408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->num_id_req = 0; 11418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->num_notification = 0; 11428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->counter > EAP_AKA_MAX_FAST_REAUTHS) { 11438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA: Maximum number of " 11448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "fast reauths performed - force fullauth"); 11458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_clear_identities(data, CLEAR_REAUTH_ID | CLEAR_EAP_ID); 11468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 11478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(decrypted); 11488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_aka_response_reauth(data, id, 0, data->nonce_s); 11498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 11508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 11518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 11528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * eap_aka_process(struct eap_sm *sm, void *priv, 11538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_method_ret *ret, 11548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct wpabuf *reqData) 11558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 11568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_aka_data *data = priv; 11578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct eap_hdr *req; 11588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 subtype, id; 11598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf *res; 11608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *pos; 11618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sim_attrs attr; 11628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t len; 11638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 11648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_hexdump_buf(MSG_DEBUG, "EAP-AKA: EAP data", reqData); 11658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eap_get_config_identity(sm, &len) == NULL) { 11668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-AKA: Identity not configured"); 11678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sm_request_identity(sm); 11688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret->ignore = TRUE; 11698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 11708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 11718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 11728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pos = eap_hdr_validate(EAP_VENDOR_IETF, data->eap_method, reqData, 11738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt &len); 11748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (pos == NULL || len < 1) { 11758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret->ignore = TRUE; 11768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 11778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 11788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt req = wpabuf_head(reqData); 11798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt id = req->identifier; 11808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt len = be_to_host16(req->length); 11818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 11828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret->ignore = FALSE; 11838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret->methodState = METHOD_MAY_CONT; 11848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret->decision = DECISION_FAIL; 11858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret->allowNotifications = TRUE; 11868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 11878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt subtype = *pos++; 11888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA: Subtype=%d", subtype); 11898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pos += 2; /* Reserved */ 11908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 11918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eap_sim_parse_attr(pos, wpabuf_head_u8(reqData) + len, &attr, 11928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->eap_method == EAP_TYPE_AKA_PRIME ? 2 : 1, 11938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 0)) { 11948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt res = eap_aka_client_error(data, id, 11958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_UNABLE_TO_PROCESS_PACKET); 11968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt goto done; 11978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 11988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 11998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt switch (subtype) { 12008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case EAP_AKA_SUBTYPE_IDENTITY: 12018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt res = eap_aka_process_identity(sm, data, id, reqData, &attr); 12028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 12038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case EAP_AKA_SUBTYPE_CHALLENGE: 12048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt res = eap_aka_process_challenge(sm, data, id, reqData, &attr); 12058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 12068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case EAP_AKA_SUBTYPE_NOTIFICATION: 12078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt res = eap_aka_process_notification(sm, data, id, reqData, 12088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt &attr); 12098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 12108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case EAP_AKA_SUBTYPE_REAUTHENTICATION: 12118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt res = eap_aka_process_reauthentication(sm, data, id, reqData, 12128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt &attr); 12138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 12148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case EAP_AKA_SUBTYPE_CLIENT_ERROR: 12158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA: subtype Client-Error"); 12168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt res = eap_aka_client_error(data, id, 12178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_UNABLE_TO_PROCESS_PACKET); 12188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 12198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt default: 12208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-AKA: Unknown subtype=%d", subtype); 12218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt res = eap_aka_client_error(data, id, 12228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_AKA_UNABLE_TO_PROCESS_PACKET); 12238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 12248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 12258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 12268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtdone: 12278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->state == FAILURE) { 12288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret->decision = DECISION_FAIL; 12298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret->methodState = METHOD_DONE; 12308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else if (data->state == SUCCESS) { 12318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret->decision = data->use_result_ind ? 12328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt DECISION_UNCOND_SUCC : DECISION_COND_SUCC; 12338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* 12348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * It is possible for the server to reply with AKA 12358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Notification, so we must allow the method to continue and 12368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * not only accept EAP-Success at this point. 12378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 12388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret->methodState = data->use_result_ind ? 12398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt METHOD_DONE : METHOD_MAY_CONT; 12408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else if (data->state == RESULT_FAILURE) 12418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret->methodState = METHOD_CONT; 12428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt else if (data->state == RESULT_SUCCESS) 12438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret->methodState = METHOD_CONT; 12448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 12458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (ret->methodState == METHOD_DONE) { 12468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret->allowNotifications = FALSE; 12478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 12488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 12498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return res; 12508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 12518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 12528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 12538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic Boolean eap_aka_has_reauth_data(struct eap_sm *sm, void *priv) 12548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 12558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_aka_data *data = priv; 12568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return data->pseudonym || data->reauth_id; 12578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 12588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 12598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 12608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void eap_aka_deinit_for_reauth(struct eap_sm *sm, void *priv) 12618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 12628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_aka_data *data = priv; 12638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_clear_identities(data, CLEAR_EAP_ID); 12648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->prev_id = -1; 12658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_free(data->id_msgs); 12668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->id_msgs = NULL; 12678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->use_result_ind = 0; 12688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->kdf_negotiation = 0; 12698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 12708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 12718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 12728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void * eap_aka_init_for_reauth(struct eap_sm *sm, void *priv) 12738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 12748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_aka_data *data = priv; 12758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->num_id_req = 0; 12768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->num_notification = 0; 12778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_aka_state(data, CONTINUE); 12788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return priv; 12798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 12808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 12818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 12828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic const u8 * eap_aka_get_identity(struct eap_sm *sm, void *priv, 12838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t *len) 12848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 12858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_aka_data *data = priv; 12868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 12878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->reauth_id) { 12888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *len = data->reauth_id_len; 12898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return data->reauth_id; 12908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 12918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 12928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->pseudonym) { 12938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *len = data->pseudonym_len; 12948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return data->pseudonym; 12958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 12968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 12978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 12988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 12998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic Boolean eap_aka_isKeyAvailable(struct eap_sm *sm, void *priv) 13028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 13038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_aka_data *data = priv; 13048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return data->state == SUCCESS; 13058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 13068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic u8 * eap_aka_getKey(struct eap_sm *sm, void *priv, size_t *len) 13098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 13108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_aka_data *data = priv; 13118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *key; 13128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->state != SUCCESS) 13148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 13158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt key = os_malloc(EAP_SIM_KEYING_DATA_LEN); 13178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (key == NULL) 13188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 13198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *len = EAP_SIM_KEYING_DATA_LEN; 13218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(key, data->msk, EAP_SIM_KEYING_DATA_LEN); 13228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return key; 13248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 13258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic u8 * eap_aka_get_emsk(struct eap_sm *sm, void *priv, size_t *len) 13288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 13298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_aka_data *data = priv; 13308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *key; 13318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->state != SUCCESS) 13338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 13348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt key = os_malloc(EAP_EMSK_LEN); 13368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (key == NULL) 13378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 13388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *len = EAP_EMSK_LEN; 13408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(key, data->emsk, EAP_EMSK_LEN); 13418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return key; 13438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 13448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint eap_peer_aka_register(void) 13478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 13488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_method *eap; 13498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int ret; 13508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION, 13528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_VENDOR_IETF, EAP_TYPE_AKA, "AKA"); 13538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eap == NULL) 13548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 13558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->init = eap_aka_init; 13578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->deinit = eap_aka_deinit; 13588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->process = eap_aka_process; 13598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->isKeyAvailable = eap_aka_isKeyAvailable; 13608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->getKey = eap_aka_getKey; 13618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->has_reauth_data = eap_aka_has_reauth_data; 13628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->deinit_for_reauth = eap_aka_deinit_for_reauth; 13638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->init_for_reauth = eap_aka_init_for_reauth; 13648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->get_identity = eap_aka_get_identity; 13658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->get_emsk = eap_aka_get_emsk; 13668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret = eap_peer_method_register(eap); 13688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (ret) 13698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_peer_method_free(eap); 13708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return ret; 13718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 13728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifdef EAP_AKA_PRIME 13758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint eap_peer_aka_prime_register(void) 13768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 13778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_method *eap; 13788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int ret; 13798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION, 13818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_VENDOR_IETF, EAP_TYPE_AKA_PRIME, 13828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "AKA'"); 13838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eap == NULL) 13848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 13858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->init = eap_aka_prime_init; 13878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->deinit = eap_aka_deinit; 13888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->process = eap_aka_process; 13898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->isKeyAvailable = eap_aka_isKeyAvailable; 13908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->getKey = eap_aka_getKey; 13918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->has_reauth_data = eap_aka_has_reauth_data; 13928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->deinit_for_reauth = eap_aka_deinit_for_reauth; 13938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->init_for_reauth = eap_aka_init_for_reauth; 13948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->get_identity = eap_aka_get_identity; 13958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->get_emsk = eap_aka_get_emsk; 13968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret = eap_peer_method_register(eap); 13988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (ret) 13998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_peer_method_free(eap); 14008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 14018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return ret; 14028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 14038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* EAP_AKA_PRIME */ 1404