18d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* 28d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * hostapd / EAP-SAKE (RFC 4763) server 38d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Copyright (c) 2006-2007, 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 "crypto/random.h" 138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "eap_server/eap_i.h" 148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "eap_common/eap_sake_common.h" 158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstruct eap_sake_data { 188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt enum { IDENTITY, CHALLENGE, CONFIRM, SUCCESS, FAILURE } state; 198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 rand_s[EAP_SAKE_RAND_LEN]; 208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 rand_p[EAP_SAKE_RAND_LEN]; 218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct { 228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 auth[EAP_SAKE_TEK_AUTH_LEN]; 238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 cipher[EAP_SAKE_TEK_CIPHER_LEN]; 248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } tek; 258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 msk[EAP_MSK_LEN]; 268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 emsk[EAP_EMSK_LEN]; 278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 session_id; 288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *peerid; 298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t peerid_len; 308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt}; 318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic const char * eap_sake_state_txt(int state) 348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt switch (state) { 368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case IDENTITY: 378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return "IDENTITY"; 388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case CHALLENGE: 398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return "CHALLENGE"; 408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case CONFIRM: 418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return "CONFIRM"; 428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case SUCCESS: 438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return "SUCCESS"; 448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case FAILURE: 458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return "FAILURE"; 468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt default: 478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return "?"; 488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void eap_sake_state(struct eap_sake_data *data, int state) 538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-SAKE: %s -> %s", 558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sake_state_txt(data->state), 568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sake_state_txt(state)); 578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->state = state; 588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void * eap_sake_init(struct eap_sm *sm) 628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_data *data; 648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data = os_zalloc(sizeof(*data)); 668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data == NULL) 678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->state = CHALLENGE; 698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (os_get_random(&data->session_id, 1)) { 718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_ERROR, "EAP-SAKE: Failed to get random data"); 728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data); 738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-SAKE: Initialized Session ID %d", 768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->session_id); 778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return data; 798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void eap_sake_reset(struct eap_sm *sm, void *priv) 838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_data *data = priv; 858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data->peerid); 86c28170251eb54dbf64a9074a07fee377587425b2Dmitry Shmidt bin_clear_free(data, sizeof(*data)); 878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * eap_sake_build_msg(struct eap_sake_data *data, 918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 id, size_t length, u8 subtype) 928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_hdr *sake; 948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf *msg; 958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t plen; 968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt plen = sizeof(struct eap_sake_hdr) + length; 988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt msg = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_SAKE, plen, 1008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_CODE_REQUEST, id); 1018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (msg == NULL) { 1028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_ERROR, "EAP-SAKE: Failed to allocate memory " 1038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "request"); 1048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 1058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sake = wpabuf_put(msg, sizeof(*sake)); 1088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sake->version = EAP_SAKE_VERSION; 1098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sake->session_id = data->session_id; 1108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sake->subtype = subtype; 1118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return msg; 1138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * eap_sake_build_identity(struct eap_sm *sm, 1178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_data *data, 1188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 id) 1198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf *msg; 1218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t plen; 1228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-SAKE: Request/Identity"); 1248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt plen = 4; 12634af306c42b7ccf956508e7cd23f0ba90606e360Dmitry Shmidt plen += 2 + sm->server_id_len; 1278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt msg = eap_sake_build_msg(data, id, plen, EAP_SAKE_SUBTYPE_IDENTITY); 1288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (msg == NULL) { 1298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->state = FAILURE; 1308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 1318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-SAKE: * AT_PERM_ID_REQ"); 1348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sake_add_attr(msg, EAP_SAKE_AT_PERM_ID_REQ, NULL, 2); 1358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 13634af306c42b7ccf956508e7cd23f0ba90606e360Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-SAKE: * AT_SERVERID"); 13734af306c42b7ccf956508e7cd23f0ba90606e360Dmitry Shmidt eap_sake_add_attr(msg, EAP_SAKE_AT_SERVERID, 13834af306c42b7ccf956508e7cd23f0ba90606e360Dmitry Shmidt sm->server_id, sm->server_id_len); 1398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return msg; 1418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * eap_sake_build_challenge(struct eap_sm *sm, 1458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_data *data, 1468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 id) 1478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf *msg; 1498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t plen; 1508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-SAKE: Request/Challenge"); 1528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (random_get_bytes(data->rand_s, EAP_SAKE_RAND_LEN)) { 1548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_ERROR, "EAP-SAKE: Failed to get random data"); 1558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->state = FAILURE; 1568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 1578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_hexdump(MSG_MSGDUMP, "EAP-SAKE: RAND_S (server rand)", 1598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->rand_s, EAP_SAKE_RAND_LEN); 1608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 16134af306c42b7ccf956508e7cd23f0ba90606e360Dmitry Shmidt plen = 2 + EAP_SAKE_RAND_LEN + 2 + sm->server_id_len; 1628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt msg = eap_sake_build_msg(data, id, plen, EAP_SAKE_SUBTYPE_CHALLENGE); 1638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (msg == NULL) { 1648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->state = FAILURE; 1658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 1668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-SAKE: * AT_RAND_S"); 1698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sake_add_attr(msg, EAP_SAKE_AT_RAND_S, 1708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->rand_s, EAP_SAKE_RAND_LEN); 1718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 17234af306c42b7ccf956508e7cd23f0ba90606e360Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-SAKE: * AT_SERVERID"); 17334af306c42b7ccf956508e7cd23f0ba90606e360Dmitry Shmidt eap_sake_add_attr(msg, EAP_SAKE_AT_SERVERID, 17434af306c42b7ccf956508e7cd23f0ba90606e360Dmitry Shmidt sm->server_id, sm->server_id_len); 1758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return msg; 1778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * eap_sake_build_confirm(struct eap_sm *sm, 1818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_data *data, 1828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 id) 1838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf *msg; 1858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *mic; 1868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-SAKE: Request/Confirm"); 1888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt msg = eap_sake_build_msg(data, id, 2 + EAP_SAKE_MIC_LEN, 1908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_SAKE_SUBTYPE_CONFIRM); 1918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (msg == NULL) { 1928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->state = FAILURE; 1938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 1948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-SAKE: * AT_MIC_S"); 1978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_put_u8(msg, EAP_SAKE_AT_MIC_S); 1988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_put_u8(msg, 2 + EAP_SAKE_MIC_LEN); 1998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt mic = wpabuf_put(msg, EAP_SAKE_MIC_LEN); 2008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eap_sake_compute_mic(data->tek.auth, data->rand_s, data->rand_p, 20134af306c42b7ccf956508e7cd23f0ba90606e360Dmitry Shmidt sm->server_id, sm->server_id_len, 2028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->peerid, data->peerid_len, 0, 2038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_head(msg), wpabuf_len(msg), mic, mic)) 2048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt { 2058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-SAKE: Failed to compute MIC"); 2068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->state = FAILURE; 2078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(msg); 2088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 2098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return msg; 2128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 2138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic struct wpabuf * eap_sake_buildReq(struct eap_sm *sm, void *priv, u8 id) 2168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 2178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_data *data = priv; 2188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt switch (data->state) { 2208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case IDENTITY: 2218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_sake_build_identity(sm, data, id); 2228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case CHALLENGE: 2238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_sake_build_challenge(sm, data, id); 2248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case CONFIRM: 2258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eap_sake_build_confirm(sm, data, id); 2268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt default: 2278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-SAKE: Unknown state %d in buildReq", 2288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->state); 2298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 2308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 2328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 2338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic Boolean eap_sake_check(struct eap_sm *sm, void *priv, 2368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf *respData) 2378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 2388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_data *data = priv; 2398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_hdr *resp; 2408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t len; 2418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 version, session_id, subtype; 2428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *pos; 2438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_SAKE, respData, &len); 2458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (pos == NULL || len < sizeof(struct eap_sake_hdr)) { 2468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-SAKE: Invalid frame"); 2478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return TRUE; 2488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt resp = (struct eap_sake_hdr *) pos; 2518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt version = resp->version; 2528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt session_id = resp->session_id; 2538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt subtype = resp->subtype; 2548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (version != EAP_SAKE_VERSION) { 2568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-SAKE: Unknown version %d", version); 2578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return TRUE; 2588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (session_id != data->session_id) { 2618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-SAKE: Session ID mismatch (%d,%d)", 2628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt session_id, data->session_id); 2638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return TRUE; 2648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-SAKE: Received frame: subtype=%d", subtype); 2678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->state == IDENTITY && subtype == EAP_SAKE_SUBTYPE_IDENTITY) 2698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return FALSE; 2708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->state == CHALLENGE && subtype == EAP_SAKE_SUBTYPE_CHALLENGE) 2728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return FALSE; 2738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->state == CONFIRM && subtype == EAP_SAKE_SUBTYPE_CONFIRM) 2758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return FALSE; 2768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (subtype == EAP_SAKE_SUBTYPE_AUTH_REJECT) 2788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return FALSE; 2798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-SAKE: Unexpected subtype=%d in state=%d", 2818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt subtype, data->state); 2828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return TRUE; 2848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 2858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void eap_sake_process_identity(struct eap_sm *sm, 2888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_data *data, 2898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct wpabuf *respData, 2908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *payload, size_t payloadlen) 2918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 2928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->state != IDENTITY) 2938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 2948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-SAKE: Received Response/Identity"); 2968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* TODO: update identity and select new user data */ 2978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sake_state(data, CHALLENGE); 2988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 2998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void eap_sake_process_challenge(struct eap_sm *sm, 3028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_data *data, 3038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct wpabuf *respData, 3048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *payload, size_t payloadlen) 3058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 3068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_parse_attr attr; 3078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 mic_p[EAP_SAKE_MIC_LEN]; 3088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->state != CHALLENGE) 3108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 3118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-SAKE: Received Response/Challenge"); 3138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eap_sake_parse_attributes(payload, payloadlen, &attr)) 3158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 3168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!attr.rand_p || !attr.mic_p) { 3188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-SAKE: Response/Challenge did not " 3198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "include AT_RAND_P or AT_MIC_P"); 3208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 3218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(data->rand_p, attr.rand_p, EAP_SAKE_RAND_LEN); 3248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(data->peerid); 3268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->peerid = NULL; 3278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->peerid_len = 0; 3288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (attr.peerid) { 3298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->peerid = os_malloc(attr.peerid_len); 3308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->peerid == NULL) 3318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 3328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(data->peerid, attr.peerid, attr.peerid_len); 3338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->peerid_len = attr.peerid_len; 3348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (sm->user == NULL || sm->user->password == NULL || 3378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sm->user->password_len != 2 * EAP_SAKE_ROOT_SECRET_LEN) { 3388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-SAKE: Plaintext password with " 3398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "%d-byte key not configured", 3408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2 * EAP_SAKE_ROOT_SECRET_LEN); 3418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->state = FAILURE; 3428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 3438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sake_derive_keys(sm->user->password, 3458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sm->user->password + EAP_SAKE_ROOT_SECRET_LEN, 3468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->rand_s, data->rand_p, 3478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt (u8 *) &data->tek, data->msk, data->emsk); 3488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sake_compute_mic(data->tek.auth, data->rand_s, data->rand_p, 35034af306c42b7ccf956508e7cd23f0ba90606e360Dmitry Shmidt sm->server_id, sm->server_id_len, 3518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->peerid, data->peerid_len, 1, 3528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_head(respData), wpabuf_len(respData), 3538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt attr.mic_p, mic_p); 354c28170251eb54dbf64a9074a07fee377587425b2Dmitry Shmidt if (os_memcmp_const(attr.mic_p, mic_p, EAP_SAKE_MIC_LEN) != 0) { 3558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-SAKE: Incorrect AT_MIC_P"); 3568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sake_state(data, FAILURE); 3578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 3588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sake_state(data, CONFIRM); 3618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 3628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void eap_sake_process_confirm(struct eap_sm *sm, 3658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_data *data, 3668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct wpabuf *respData, 3678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *payload, size_t payloadlen) 3688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 3698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_parse_attr attr; 3708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 mic_p[EAP_SAKE_MIC_LEN]; 3718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->state != CONFIRM) 3738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 3748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-SAKE: Received Response/Confirm"); 3768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eap_sake_parse_attributes(payload, payloadlen, &attr)) 3788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 3798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!attr.mic_p) { 3818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-SAKE: Response/Confirm did not " 3828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "include AT_MIC_P"); 3838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 3848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 3858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sake_compute_mic(data->tek.auth, data->rand_s, data->rand_p, 38734af306c42b7ccf956508e7cd23f0ba90606e360Dmitry Shmidt sm->server_id, sm->server_id_len, 3888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt data->peerid, data->peerid_len, 1, 3898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpabuf_head(respData), wpabuf_len(respData), 3908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt attr.mic_p, mic_p); 391c28170251eb54dbf64a9074a07fee377587425b2Dmitry Shmidt if (os_memcmp_const(attr.mic_p, mic_p, EAP_SAKE_MIC_LEN) != 0) { 3928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_INFO, "EAP-SAKE: Incorrect AT_MIC_P"); 3938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sake_state(data, FAILURE); 3948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else 3958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sake_state(data, SUCCESS); 3968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 3978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 3998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void eap_sake_process_auth_reject(struct eap_sm *sm, 4008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_data *data, 4018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct wpabuf *respData, 4028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *payload, size_t payloadlen) 4038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 4048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "EAP-SAKE: Received Response/Auth-Reject"); 4058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sake_state(data, FAILURE); 4068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 4078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void eap_sake_process(struct eap_sm *sm, void *priv, 4108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf *respData) 4118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 4128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_data *data = priv; 4138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_hdr *resp; 4148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 subtype; 4158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t len; 4168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *pos, *end; 4178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_SAKE, respData, &len); 4198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (pos == NULL || len < sizeof(struct eap_sake_hdr)) 4208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 4218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt resp = (struct eap_sake_hdr *) pos; 4238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt end = pos + len; 4248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt subtype = resp->subtype; 4258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pos = (u8 *) (resp + 1); 4268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_hexdump(MSG_DEBUG, "EAP-SAKE: Received attributes", 4288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pos, end - pos); 4298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt switch (subtype) { 4318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case EAP_SAKE_SUBTYPE_IDENTITY: 4328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sake_process_identity(sm, data, respData, pos, end - pos); 4338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 4348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case EAP_SAKE_SUBTYPE_CHALLENGE: 4358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sake_process_challenge(sm, data, respData, pos, end - pos); 4368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 4378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case EAP_SAKE_SUBTYPE_CONFIRM: 4388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sake_process_confirm(sm, data, respData, pos, end - pos); 4398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 4408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt case EAP_SAKE_SUBTYPE_AUTH_REJECT: 4418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_sake_process_auth_reject(sm, data, respData, pos, 4428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt end - pos); 4438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt break; 4448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 4458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 4468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic Boolean eap_sake_isDone(struct eap_sm *sm, void *priv) 4498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 4508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_data *data = priv; 4518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return data->state == SUCCESS || data->state == FAILURE; 4528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 4538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic u8 * eap_sake_getKey(struct eap_sm *sm, void *priv, size_t *len) 4568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 4578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_data *data = priv; 4588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *key; 4598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->state != SUCCESS) 4618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 4628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt key = os_malloc(EAP_MSK_LEN); 4648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (key == NULL) 4658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 4668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(key, data->msk, EAP_MSK_LEN); 4678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *len = EAP_MSK_LEN; 4688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return key; 4708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 4718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic u8 * eap_sake_get_emsk(struct eap_sm *sm, void *priv, size_t *len) 4748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 4758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_data *data = priv; 4768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *key; 4778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (data->state != SUCCESS) 4798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 4808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt key = os_malloc(EAP_EMSK_LEN); 4828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (key == NULL) 4838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return NULL; 4848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(key, data->emsk, EAP_EMSK_LEN); 4858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *len = EAP_EMSK_LEN; 4868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return key; 4888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 4898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic Boolean eap_sake_isSuccess(struct eap_sm *sm, void *priv) 4928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 4938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sake_data *data = priv; 4948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return data->state == SUCCESS; 4958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 4968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 4978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 498fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidtstatic u8 * eap_sake_get_session_id(struct eap_sm *sm, void *priv, size_t *len) 499fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt{ 500fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt struct eap_sake_data *data = priv; 501fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt u8 *id; 502fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt 503fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt if (data->state != SUCCESS) 504fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt return NULL; 505fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt 506fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt *len = 1 + 2 * EAP_SAKE_RAND_LEN; 507fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt id = os_malloc(*len); 508fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt if (id == NULL) 509fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt return NULL; 510fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt 511fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt id[0] = EAP_TYPE_SAKE; 512fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt os_memcpy(id + 1, data->rand_s, EAP_SAKE_RAND_LEN); 513fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt os_memcpy(id + 1 + EAP_SAKE_RAND_LEN, data->rand_s, EAP_SAKE_RAND_LEN); 514fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt wpa_hexdump(MSG_DEBUG, "EAP-SAKE: Derived Session-Id", id, *len); 515fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt 516fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt return id; 517fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt} 518fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt 519fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt 5208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint eap_server_sake_register(void) 5218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 5228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_method *eap; 5238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int ret; 5248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap = eap_server_method_alloc(EAP_SERVER_METHOD_INTERFACE_VERSION, 5268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EAP_VENDOR_IETF, EAP_TYPE_SAKE, "SAKE"); 5278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (eap == NULL) 5288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return -1; 5298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->init = eap_sake_init; 5318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->reset = eap_sake_reset; 5328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->buildReq = eap_sake_buildReq; 5338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->check = eap_sake_check; 5348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->process = eap_sake_process; 5358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->isDone = eap_sake_isDone; 5368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->getKey = eap_sake_getKey; 5378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->isSuccess = eap_sake_isSuccess; 5388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap->get_emsk = eap_sake_get_emsk; 539fb45fd5cfed8bdccd0859c7fc05449fc187e2d06Dmitry Shmidt eap->getSessionId = eap_sake_get_session_id; 5408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 5418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ret = eap_server_method_register(eap); 5428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (ret) 5438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt eap_server_method_free(eap); 5448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return ret; 5458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 546