1214501Srpaulo/* 2214501Srpaulo * EAP-FAST server (RFC 4851) 3214501Srpaulo * Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi> 4214501Srpaulo * 5252726Srpaulo * This software may be distributed under the terms of the BSD license. 6252726Srpaulo * See README for more details. 7214501Srpaulo */ 8214501Srpaulo 9214501Srpaulo#include "includes.h" 10214501Srpaulo 11214501Srpaulo#include "common.h" 12214501Srpaulo#include "crypto/aes_wrap.h" 13214501Srpaulo#include "crypto/sha1.h" 14214501Srpaulo#include "crypto/tls.h" 15252726Srpaulo#include "crypto/random.h" 16214501Srpaulo#include "eap_common/eap_tlv_common.h" 17214501Srpaulo#include "eap_common/eap_fast_common.h" 18214501Srpaulo#include "eap_i.h" 19214501Srpaulo#include "eap_tls_common.h" 20214501Srpaulo 21214501Srpaulo 22214501Srpaulostatic void eap_fast_reset(struct eap_sm *sm, void *priv); 23214501Srpaulo 24214501Srpaulo 25214501Srpaulo/* Private PAC-Opaque TLV types */ 26214501Srpaulo#define PAC_OPAQUE_TYPE_PAD 0 27214501Srpaulo#define PAC_OPAQUE_TYPE_KEY 1 28214501Srpaulo#define PAC_OPAQUE_TYPE_LIFETIME 2 29214501Srpaulo#define PAC_OPAQUE_TYPE_IDENTITY 3 30214501Srpaulo 31214501Srpaulostruct eap_fast_data { 32214501Srpaulo struct eap_ssl_data ssl; 33214501Srpaulo enum { 34214501Srpaulo START, PHASE1, PHASE2_START, PHASE2_ID, PHASE2_METHOD, 35214501Srpaulo CRYPTO_BINDING, REQUEST_PAC, SUCCESS, FAILURE 36214501Srpaulo } state; 37214501Srpaulo 38214501Srpaulo int fast_version; 39214501Srpaulo const struct eap_method *phase2_method; 40214501Srpaulo void *phase2_priv; 41214501Srpaulo int force_version; 42214501Srpaulo int peer_version; 43214501Srpaulo 44214501Srpaulo u8 crypto_binding_nonce[32]; 45214501Srpaulo int final_result; 46214501Srpaulo 47214501Srpaulo struct eap_fast_key_block_provisioning *key_block_p; 48214501Srpaulo 49214501Srpaulo u8 simck[EAP_FAST_SIMCK_LEN]; 50214501Srpaulo u8 cmk[EAP_FAST_CMK_LEN]; 51214501Srpaulo int simck_idx; 52214501Srpaulo 53214501Srpaulo u8 pac_opaque_encr[16]; 54214501Srpaulo u8 *srv_id; 55214501Srpaulo size_t srv_id_len; 56214501Srpaulo char *srv_id_info; 57214501Srpaulo 58214501Srpaulo int anon_provisioning; 59214501Srpaulo int send_new_pac; /* server triggered re-keying of Tunnel PAC */ 60214501Srpaulo struct wpabuf *pending_phase2_resp; 61214501Srpaulo u8 *identity; /* from PAC-Opaque */ 62214501Srpaulo size_t identity_len; 63214501Srpaulo int eap_seq; 64214501Srpaulo int tnc_started; 65214501Srpaulo 66214501Srpaulo int pac_key_lifetime; 67214501Srpaulo int pac_key_refresh_time; 68214501Srpaulo}; 69214501Srpaulo 70214501Srpaulo 71214501Srpaulostatic int eap_fast_process_phase2_start(struct eap_sm *sm, 72214501Srpaulo struct eap_fast_data *data); 73214501Srpaulo 74214501Srpaulo 75214501Srpaulostatic const char * eap_fast_state_txt(int state) 76214501Srpaulo{ 77214501Srpaulo switch (state) { 78214501Srpaulo case START: 79214501Srpaulo return "START"; 80214501Srpaulo case PHASE1: 81214501Srpaulo return "PHASE1"; 82214501Srpaulo case PHASE2_START: 83214501Srpaulo return "PHASE2_START"; 84214501Srpaulo case PHASE2_ID: 85214501Srpaulo return "PHASE2_ID"; 86214501Srpaulo case PHASE2_METHOD: 87214501Srpaulo return "PHASE2_METHOD"; 88214501Srpaulo case CRYPTO_BINDING: 89214501Srpaulo return "CRYPTO_BINDING"; 90214501Srpaulo case REQUEST_PAC: 91214501Srpaulo return "REQUEST_PAC"; 92214501Srpaulo case SUCCESS: 93214501Srpaulo return "SUCCESS"; 94214501Srpaulo case FAILURE: 95214501Srpaulo return "FAILURE"; 96214501Srpaulo default: 97214501Srpaulo return "Unknown?!"; 98214501Srpaulo } 99214501Srpaulo} 100214501Srpaulo 101214501Srpaulo 102214501Srpaulostatic void eap_fast_state(struct eap_fast_data *data, int state) 103214501Srpaulo{ 104214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: %s -> %s", 105214501Srpaulo eap_fast_state_txt(data->state), 106214501Srpaulo eap_fast_state_txt(state)); 107214501Srpaulo data->state = state; 108214501Srpaulo} 109214501Srpaulo 110214501Srpaulo 111214501Srpaulostatic EapType eap_fast_req_failure(struct eap_sm *sm, 112214501Srpaulo struct eap_fast_data *data) 113214501Srpaulo{ 114214501Srpaulo /* TODO: send Result TLV(FAILURE) */ 115214501Srpaulo eap_fast_state(data, FAILURE); 116214501Srpaulo return EAP_TYPE_NONE; 117214501Srpaulo} 118214501Srpaulo 119214501Srpaulo 120214501Srpaulostatic int eap_fast_session_ticket_cb(void *ctx, const u8 *ticket, size_t len, 121214501Srpaulo const u8 *client_random, 122214501Srpaulo const u8 *server_random, 123214501Srpaulo u8 *master_secret) 124214501Srpaulo{ 125214501Srpaulo struct eap_fast_data *data = ctx; 126214501Srpaulo const u8 *pac_opaque; 127214501Srpaulo size_t pac_opaque_len; 128214501Srpaulo u8 *buf, *pos, *end, *pac_key = NULL; 129214501Srpaulo os_time_t lifetime = 0; 130214501Srpaulo struct os_time now; 131214501Srpaulo u8 *identity = NULL; 132214501Srpaulo size_t identity_len = 0; 133214501Srpaulo 134214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: SessionTicket callback"); 135214501Srpaulo wpa_hexdump(MSG_DEBUG, "EAP-FAST: SessionTicket (PAC-Opaque)", 136214501Srpaulo ticket, len); 137214501Srpaulo 138214501Srpaulo if (len < 4 || WPA_GET_BE16(ticket) != PAC_TYPE_PAC_OPAQUE) { 139214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Ignore invalid " 140214501Srpaulo "SessionTicket"); 141214501Srpaulo return 0; 142214501Srpaulo } 143214501Srpaulo 144214501Srpaulo pac_opaque_len = WPA_GET_BE16(ticket + 2); 145214501Srpaulo pac_opaque = ticket + 4; 146214501Srpaulo if (pac_opaque_len < 8 || pac_opaque_len % 8 || 147214501Srpaulo pac_opaque_len > len - 4) { 148214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Ignore invalid PAC-Opaque " 149214501Srpaulo "(len=%lu left=%lu)", 150214501Srpaulo (unsigned long) pac_opaque_len, 151214501Srpaulo (unsigned long) len); 152214501Srpaulo return 0; 153214501Srpaulo } 154214501Srpaulo wpa_hexdump(MSG_DEBUG, "EAP-FAST: Received PAC-Opaque", 155214501Srpaulo pac_opaque, pac_opaque_len); 156214501Srpaulo 157214501Srpaulo buf = os_malloc(pac_opaque_len - 8); 158214501Srpaulo if (buf == NULL) { 159214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to allocate memory " 160214501Srpaulo "for decrypting PAC-Opaque"); 161214501Srpaulo return 0; 162214501Srpaulo } 163214501Srpaulo 164214501Srpaulo if (aes_unwrap(data->pac_opaque_encr, (pac_opaque_len - 8) / 8, 165214501Srpaulo pac_opaque, buf) < 0) { 166214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to decrypt " 167214501Srpaulo "PAC-Opaque"); 168214501Srpaulo os_free(buf); 169214501Srpaulo /* 170214501Srpaulo * This may have been caused by server changing the PAC-Opaque 171214501Srpaulo * encryption key, so just ignore this PAC-Opaque instead of 172214501Srpaulo * failing the authentication completely. Provisioning can now 173214501Srpaulo * be used to provision a new PAC. 174214501Srpaulo */ 175214501Srpaulo return 0; 176214501Srpaulo } 177214501Srpaulo 178214501Srpaulo end = buf + pac_opaque_len - 8; 179214501Srpaulo wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: Decrypted PAC-Opaque", 180214501Srpaulo buf, end - buf); 181214501Srpaulo 182214501Srpaulo pos = buf; 183214501Srpaulo while (pos + 1 < end) { 184214501Srpaulo if (pos + 2 + pos[1] > end) 185214501Srpaulo break; 186214501Srpaulo 187214501Srpaulo switch (*pos) { 188214501Srpaulo case PAC_OPAQUE_TYPE_PAD: 189214501Srpaulo pos = end; 190214501Srpaulo break; 191214501Srpaulo case PAC_OPAQUE_TYPE_KEY: 192214501Srpaulo if (pos[1] != EAP_FAST_PAC_KEY_LEN) { 193214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Invalid " 194214501Srpaulo "PAC-Key length %d", pos[1]); 195214501Srpaulo os_free(buf); 196214501Srpaulo return -1; 197214501Srpaulo } 198214501Srpaulo pac_key = pos + 2; 199214501Srpaulo wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: PAC-Key from " 200214501Srpaulo "decrypted PAC-Opaque", 201214501Srpaulo pac_key, EAP_FAST_PAC_KEY_LEN); 202214501Srpaulo break; 203214501Srpaulo case PAC_OPAQUE_TYPE_LIFETIME: 204214501Srpaulo if (pos[1] != 4) { 205214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Invalid " 206214501Srpaulo "PAC-Key lifetime length %d", 207214501Srpaulo pos[1]); 208214501Srpaulo os_free(buf); 209214501Srpaulo return -1; 210214501Srpaulo } 211214501Srpaulo lifetime = WPA_GET_BE32(pos + 2); 212214501Srpaulo break; 213214501Srpaulo case PAC_OPAQUE_TYPE_IDENTITY: 214214501Srpaulo identity = pos + 2; 215214501Srpaulo identity_len = pos[1]; 216214501Srpaulo break; 217214501Srpaulo } 218214501Srpaulo 219214501Srpaulo pos += 2 + pos[1]; 220214501Srpaulo } 221214501Srpaulo 222214501Srpaulo if (pac_key == NULL) { 223214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: No PAC-Key included in " 224214501Srpaulo "PAC-Opaque"); 225214501Srpaulo os_free(buf); 226214501Srpaulo return -1; 227214501Srpaulo } 228214501Srpaulo 229214501Srpaulo if (identity) { 230214501Srpaulo wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: Identity from " 231214501Srpaulo "PAC-Opaque", identity, identity_len); 232214501Srpaulo os_free(data->identity); 233214501Srpaulo data->identity = os_malloc(identity_len); 234214501Srpaulo if (data->identity) { 235214501Srpaulo os_memcpy(data->identity, identity, identity_len); 236214501Srpaulo data->identity_len = identity_len; 237214501Srpaulo } 238214501Srpaulo } 239214501Srpaulo 240214501Srpaulo if (os_get_time(&now) < 0 || lifetime <= 0 || now.sec > lifetime) { 241214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Key not valid anymore " 242214501Srpaulo "(lifetime=%ld now=%ld)", lifetime, now.sec); 243214501Srpaulo data->send_new_pac = 2; 244214501Srpaulo /* 245214501Srpaulo * Allow PAC to be used to allow a PAC update with some level 246214501Srpaulo * of server authentication (i.e., do not fall back to full TLS 247214501Srpaulo * handshake since we cannot be sure that the peer would be 248214501Srpaulo * able to validate server certificate now). However, reject 249214501Srpaulo * the authentication since the PAC was not valid anymore. Peer 250214501Srpaulo * can connect again with the newly provisioned PAC after this. 251214501Srpaulo */ 252214501Srpaulo } else if (lifetime - now.sec < data->pac_key_refresh_time) { 253214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Key soft timeout; send " 254214501Srpaulo "an update if authentication succeeds"); 255214501Srpaulo data->send_new_pac = 1; 256214501Srpaulo } 257214501Srpaulo 258214501Srpaulo eap_fast_derive_master_secret(pac_key, server_random, client_random, 259214501Srpaulo master_secret); 260214501Srpaulo 261214501Srpaulo os_free(buf); 262214501Srpaulo 263214501Srpaulo return 1; 264214501Srpaulo} 265214501Srpaulo 266214501Srpaulo 267214501Srpaulostatic void eap_fast_derive_key_auth(struct eap_sm *sm, 268214501Srpaulo struct eap_fast_data *data) 269214501Srpaulo{ 270214501Srpaulo u8 *sks; 271214501Srpaulo 272214501Srpaulo /* RFC 4851, Section 5.1: 273214501Srpaulo * Extra key material after TLS key_block: session_key_seed[40] 274214501Srpaulo */ 275214501Srpaulo 276214501Srpaulo sks = eap_fast_derive_key(sm->ssl_ctx, data->ssl.conn, "key expansion", 277214501Srpaulo EAP_FAST_SKS_LEN); 278214501Srpaulo if (sks == NULL) { 279214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to derive " 280214501Srpaulo "session_key_seed"); 281214501Srpaulo return; 282214501Srpaulo } 283214501Srpaulo 284214501Srpaulo /* 285214501Srpaulo * RFC 4851, Section 5.2: 286214501Srpaulo * S-IMCK[0] = session_key_seed 287214501Srpaulo */ 288214501Srpaulo wpa_hexdump_key(MSG_DEBUG, 289214501Srpaulo "EAP-FAST: session_key_seed (SKS = S-IMCK[0])", 290214501Srpaulo sks, EAP_FAST_SKS_LEN); 291214501Srpaulo data->simck_idx = 0; 292214501Srpaulo os_memcpy(data->simck, sks, EAP_FAST_SIMCK_LEN); 293214501Srpaulo os_free(sks); 294214501Srpaulo} 295214501Srpaulo 296214501Srpaulo 297214501Srpaulostatic void eap_fast_derive_key_provisioning(struct eap_sm *sm, 298214501Srpaulo struct eap_fast_data *data) 299214501Srpaulo{ 300214501Srpaulo os_free(data->key_block_p); 301214501Srpaulo data->key_block_p = (struct eap_fast_key_block_provisioning *) 302214501Srpaulo eap_fast_derive_key(sm->ssl_ctx, data->ssl.conn, 303214501Srpaulo "key expansion", 304214501Srpaulo sizeof(*data->key_block_p)); 305214501Srpaulo if (data->key_block_p == NULL) { 306214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to derive key block"); 307214501Srpaulo return; 308214501Srpaulo } 309214501Srpaulo /* 310214501Srpaulo * RFC 4851, Section 5.2: 311214501Srpaulo * S-IMCK[0] = session_key_seed 312214501Srpaulo */ 313214501Srpaulo wpa_hexdump_key(MSG_DEBUG, 314214501Srpaulo "EAP-FAST: session_key_seed (SKS = S-IMCK[0])", 315214501Srpaulo data->key_block_p->session_key_seed, 316214501Srpaulo sizeof(data->key_block_p->session_key_seed)); 317214501Srpaulo data->simck_idx = 0; 318214501Srpaulo os_memcpy(data->simck, data->key_block_p->session_key_seed, 319214501Srpaulo EAP_FAST_SIMCK_LEN); 320214501Srpaulo wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: server_challenge", 321214501Srpaulo data->key_block_p->server_challenge, 322214501Srpaulo sizeof(data->key_block_p->server_challenge)); 323214501Srpaulo wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: client_challenge", 324214501Srpaulo data->key_block_p->client_challenge, 325214501Srpaulo sizeof(data->key_block_p->client_challenge)); 326214501Srpaulo} 327214501Srpaulo 328214501Srpaulo 329214501Srpaulostatic int eap_fast_get_phase2_key(struct eap_sm *sm, 330214501Srpaulo struct eap_fast_data *data, 331214501Srpaulo u8 *isk, size_t isk_len) 332214501Srpaulo{ 333214501Srpaulo u8 *key; 334214501Srpaulo size_t key_len; 335214501Srpaulo 336214501Srpaulo os_memset(isk, 0, isk_len); 337214501Srpaulo 338214501Srpaulo if (data->phase2_method == NULL || data->phase2_priv == NULL) { 339214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Phase 2 method not " 340214501Srpaulo "available"); 341214501Srpaulo return -1; 342214501Srpaulo } 343214501Srpaulo 344214501Srpaulo if (data->phase2_method->getKey == NULL) 345214501Srpaulo return 0; 346214501Srpaulo 347214501Srpaulo if ((key = data->phase2_method->getKey(sm, data->phase2_priv, 348214501Srpaulo &key_len)) == NULL) { 349214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Could not get key material " 350214501Srpaulo "from Phase 2"); 351214501Srpaulo return -1; 352214501Srpaulo } 353214501Srpaulo 354214501Srpaulo if (key_len > isk_len) 355214501Srpaulo key_len = isk_len; 356214501Srpaulo if (key_len == 32 && 357214501Srpaulo data->phase2_method->vendor == EAP_VENDOR_IETF && 358214501Srpaulo data->phase2_method->method == EAP_TYPE_MSCHAPV2) { 359214501Srpaulo /* 360214501Srpaulo * EAP-FAST uses reverse order for MS-MPPE keys when deriving 361214501Srpaulo * MSK from EAP-MSCHAPv2. Swap the keys here to get the correct 362214501Srpaulo * ISK for EAP-FAST cryptobinding. 363214501Srpaulo */ 364214501Srpaulo os_memcpy(isk, key + 16, 16); 365214501Srpaulo os_memcpy(isk + 16, key, 16); 366214501Srpaulo } else 367214501Srpaulo os_memcpy(isk, key, key_len); 368214501Srpaulo os_free(key); 369214501Srpaulo 370214501Srpaulo return 0; 371214501Srpaulo} 372214501Srpaulo 373214501Srpaulo 374214501Srpaulostatic int eap_fast_update_icmk(struct eap_sm *sm, struct eap_fast_data *data) 375214501Srpaulo{ 376214501Srpaulo u8 isk[32], imck[60]; 377214501Srpaulo 378214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Deriving ICMK[%d] (S-IMCK and CMK)", 379214501Srpaulo data->simck_idx + 1); 380214501Srpaulo 381214501Srpaulo /* 382214501Srpaulo * RFC 4851, Section 5.2: 383214501Srpaulo * IMCK[j] = T-PRF(S-IMCK[j-1], "Inner Methods Compound Keys", 384214501Srpaulo * MSK[j], 60) 385214501Srpaulo * S-IMCK[j] = first 40 octets of IMCK[j] 386214501Srpaulo * CMK[j] = last 20 octets of IMCK[j] 387214501Srpaulo */ 388214501Srpaulo 389214501Srpaulo if (eap_fast_get_phase2_key(sm, data, isk, sizeof(isk)) < 0) 390214501Srpaulo return -1; 391214501Srpaulo wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: ISK[j]", isk, sizeof(isk)); 392214501Srpaulo sha1_t_prf(data->simck, EAP_FAST_SIMCK_LEN, 393214501Srpaulo "Inner Methods Compound Keys", 394214501Srpaulo isk, sizeof(isk), imck, sizeof(imck)); 395214501Srpaulo data->simck_idx++; 396214501Srpaulo os_memcpy(data->simck, imck, EAP_FAST_SIMCK_LEN); 397214501Srpaulo wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: S-IMCK[j]", 398214501Srpaulo data->simck, EAP_FAST_SIMCK_LEN); 399214501Srpaulo os_memcpy(data->cmk, imck + EAP_FAST_SIMCK_LEN, EAP_FAST_CMK_LEN); 400214501Srpaulo wpa_hexdump_key(MSG_MSGDUMP, "EAP-FAST: CMK[j]", 401214501Srpaulo data->cmk, EAP_FAST_CMK_LEN); 402214501Srpaulo 403214501Srpaulo return 0; 404214501Srpaulo} 405214501Srpaulo 406214501Srpaulo 407214501Srpaulostatic void * eap_fast_init(struct eap_sm *sm) 408214501Srpaulo{ 409214501Srpaulo struct eap_fast_data *data; 410214501Srpaulo u8 ciphers[5] = { 411214501Srpaulo TLS_CIPHER_ANON_DH_AES128_SHA, 412214501Srpaulo TLS_CIPHER_AES128_SHA, 413214501Srpaulo TLS_CIPHER_RSA_DHE_AES128_SHA, 414214501Srpaulo TLS_CIPHER_RC4_SHA, 415214501Srpaulo TLS_CIPHER_NONE 416214501Srpaulo }; 417214501Srpaulo 418214501Srpaulo data = os_zalloc(sizeof(*data)); 419214501Srpaulo if (data == NULL) 420214501Srpaulo return NULL; 421214501Srpaulo data->fast_version = EAP_FAST_VERSION; 422214501Srpaulo data->force_version = -1; 423214501Srpaulo if (sm->user && sm->user->force_version >= 0) { 424214501Srpaulo data->force_version = sm->user->force_version; 425214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: forcing version %d", 426214501Srpaulo data->force_version); 427214501Srpaulo data->fast_version = data->force_version; 428214501Srpaulo } 429214501Srpaulo data->state = START; 430214501Srpaulo 431214501Srpaulo if (eap_server_tls_ssl_init(sm, &data->ssl, 0)) { 432214501Srpaulo wpa_printf(MSG_INFO, "EAP-FAST: Failed to initialize SSL."); 433214501Srpaulo eap_fast_reset(sm, data); 434214501Srpaulo return NULL; 435214501Srpaulo } 436214501Srpaulo 437214501Srpaulo if (tls_connection_set_cipher_list(sm->ssl_ctx, data->ssl.conn, 438214501Srpaulo ciphers) < 0) { 439214501Srpaulo wpa_printf(MSG_INFO, "EAP-FAST: Failed to set TLS cipher " 440214501Srpaulo "suites"); 441214501Srpaulo eap_fast_reset(sm, data); 442214501Srpaulo return NULL; 443214501Srpaulo } 444214501Srpaulo 445214501Srpaulo if (tls_connection_set_session_ticket_cb(sm->ssl_ctx, data->ssl.conn, 446214501Srpaulo eap_fast_session_ticket_cb, 447214501Srpaulo data) < 0) { 448214501Srpaulo wpa_printf(MSG_INFO, "EAP-FAST: Failed to set SessionTicket " 449214501Srpaulo "callback"); 450214501Srpaulo eap_fast_reset(sm, data); 451214501Srpaulo return NULL; 452214501Srpaulo } 453214501Srpaulo 454214501Srpaulo if (sm->pac_opaque_encr_key == NULL) { 455214501Srpaulo wpa_printf(MSG_INFO, "EAP-FAST: No PAC-Opaque encryption key " 456214501Srpaulo "configured"); 457214501Srpaulo eap_fast_reset(sm, data); 458214501Srpaulo return NULL; 459214501Srpaulo } 460214501Srpaulo os_memcpy(data->pac_opaque_encr, sm->pac_opaque_encr_key, 461214501Srpaulo sizeof(data->pac_opaque_encr)); 462214501Srpaulo 463214501Srpaulo if (sm->eap_fast_a_id == NULL) { 464214501Srpaulo wpa_printf(MSG_INFO, "EAP-FAST: No A-ID configured"); 465214501Srpaulo eap_fast_reset(sm, data); 466214501Srpaulo return NULL; 467214501Srpaulo } 468214501Srpaulo data->srv_id = os_malloc(sm->eap_fast_a_id_len); 469214501Srpaulo if (data->srv_id == NULL) { 470214501Srpaulo eap_fast_reset(sm, data); 471214501Srpaulo return NULL; 472214501Srpaulo } 473214501Srpaulo os_memcpy(data->srv_id, sm->eap_fast_a_id, sm->eap_fast_a_id_len); 474214501Srpaulo data->srv_id_len = sm->eap_fast_a_id_len; 475214501Srpaulo 476214501Srpaulo if (sm->eap_fast_a_id_info == NULL) { 477214501Srpaulo wpa_printf(MSG_INFO, "EAP-FAST: No A-ID-Info configured"); 478214501Srpaulo eap_fast_reset(sm, data); 479214501Srpaulo return NULL; 480214501Srpaulo } 481214501Srpaulo data->srv_id_info = os_strdup(sm->eap_fast_a_id_info); 482214501Srpaulo if (data->srv_id_info == NULL) { 483214501Srpaulo eap_fast_reset(sm, data); 484214501Srpaulo return NULL; 485214501Srpaulo } 486214501Srpaulo 487214501Srpaulo /* PAC-Key lifetime in seconds (hard limit) */ 488214501Srpaulo data->pac_key_lifetime = sm->pac_key_lifetime; 489214501Srpaulo 490214501Srpaulo /* 491214501Srpaulo * PAC-Key refresh time in seconds (soft limit on remaining hard 492214501Srpaulo * limit). The server will generate a new PAC-Key when this number of 493214501Srpaulo * seconds (or fewer) of the lifetime remains. 494214501Srpaulo */ 495214501Srpaulo data->pac_key_refresh_time = sm->pac_key_refresh_time; 496214501Srpaulo 497214501Srpaulo return data; 498214501Srpaulo} 499214501Srpaulo 500214501Srpaulo 501214501Srpaulostatic void eap_fast_reset(struct eap_sm *sm, void *priv) 502214501Srpaulo{ 503214501Srpaulo struct eap_fast_data *data = priv; 504214501Srpaulo if (data == NULL) 505214501Srpaulo return; 506214501Srpaulo if (data->phase2_priv && data->phase2_method) 507214501Srpaulo data->phase2_method->reset(sm, data->phase2_priv); 508214501Srpaulo eap_server_tls_ssl_deinit(sm, &data->ssl); 509214501Srpaulo os_free(data->srv_id); 510214501Srpaulo os_free(data->srv_id_info); 511214501Srpaulo os_free(data->key_block_p); 512214501Srpaulo wpabuf_free(data->pending_phase2_resp); 513214501Srpaulo os_free(data->identity); 514214501Srpaulo os_free(data); 515214501Srpaulo} 516214501Srpaulo 517214501Srpaulo 518214501Srpaulostatic struct wpabuf * eap_fast_build_start(struct eap_sm *sm, 519214501Srpaulo struct eap_fast_data *data, u8 id) 520214501Srpaulo{ 521214501Srpaulo struct wpabuf *req; 522214501Srpaulo 523214501Srpaulo req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_FAST, 524214501Srpaulo 1 + sizeof(struct pac_tlv_hdr) + data->srv_id_len, 525214501Srpaulo EAP_CODE_REQUEST, id); 526214501Srpaulo if (req == NULL) { 527214501Srpaulo wpa_printf(MSG_ERROR, "EAP-FAST: Failed to allocate memory for" 528214501Srpaulo " request"); 529214501Srpaulo eap_fast_state(data, FAILURE); 530214501Srpaulo return NULL; 531214501Srpaulo } 532214501Srpaulo 533214501Srpaulo wpabuf_put_u8(req, EAP_TLS_FLAGS_START | data->fast_version); 534214501Srpaulo 535214501Srpaulo /* RFC 4851, 4.1.1. Authority ID Data */ 536214501Srpaulo eap_fast_put_tlv(req, PAC_TYPE_A_ID, data->srv_id, data->srv_id_len); 537214501Srpaulo 538214501Srpaulo eap_fast_state(data, PHASE1); 539214501Srpaulo 540214501Srpaulo return req; 541214501Srpaulo} 542214501Srpaulo 543214501Srpaulo 544214501Srpaulostatic int eap_fast_phase1_done(struct eap_sm *sm, struct eap_fast_data *data) 545214501Srpaulo{ 546214501Srpaulo char cipher[64]; 547214501Srpaulo 548214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Phase1 done, starting Phase2"); 549214501Srpaulo 550214501Srpaulo if (tls_get_cipher(sm->ssl_ctx, data->ssl.conn, cipher, sizeof(cipher)) 551214501Srpaulo < 0) { 552214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to get cipher " 553214501Srpaulo "information"); 554214501Srpaulo eap_fast_state(data, FAILURE); 555214501Srpaulo return -1; 556214501Srpaulo } 557214501Srpaulo data->anon_provisioning = os_strstr(cipher, "ADH") != NULL; 558214501Srpaulo 559214501Srpaulo if (data->anon_provisioning) { 560214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Anonymous provisioning"); 561214501Srpaulo eap_fast_derive_key_provisioning(sm, data); 562214501Srpaulo } else 563214501Srpaulo eap_fast_derive_key_auth(sm, data); 564214501Srpaulo 565214501Srpaulo eap_fast_state(data, PHASE2_START); 566214501Srpaulo 567214501Srpaulo return 0; 568214501Srpaulo} 569214501Srpaulo 570214501Srpaulo 571214501Srpaulostatic struct wpabuf * eap_fast_build_phase2_req(struct eap_sm *sm, 572214501Srpaulo struct eap_fast_data *data, 573214501Srpaulo u8 id) 574214501Srpaulo{ 575214501Srpaulo struct wpabuf *req; 576214501Srpaulo 577214501Srpaulo if (data->phase2_priv == NULL) { 578214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Phase 2 method not " 579214501Srpaulo "initialized"); 580214501Srpaulo return NULL; 581214501Srpaulo } 582214501Srpaulo req = data->phase2_method->buildReq(sm, data->phase2_priv, id); 583214501Srpaulo if (req == NULL) 584214501Srpaulo return NULL; 585214501Srpaulo 586214501Srpaulo wpa_hexdump_buf_key(MSG_MSGDUMP, "EAP-FAST: Phase 2 EAP-Request", req); 587214501Srpaulo return eap_fast_tlv_eap_payload(req); 588214501Srpaulo} 589214501Srpaulo 590214501Srpaulo 591214501Srpaulostatic struct wpabuf * eap_fast_build_crypto_binding( 592214501Srpaulo struct eap_sm *sm, struct eap_fast_data *data) 593214501Srpaulo{ 594214501Srpaulo struct wpabuf *buf; 595214501Srpaulo struct eap_tlv_result_tlv *result; 596214501Srpaulo struct eap_tlv_crypto_binding_tlv *binding; 597214501Srpaulo 598214501Srpaulo buf = wpabuf_alloc(2 * sizeof(*result) + sizeof(*binding)); 599214501Srpaulo if (buf == NULL) 600214501Srpaulo return NULL; 601214501Srpaulo 602214501Srpaulo if (data->send_new_pac || data->anon_provisioning || 603214501Srpaulo data->phase2_method) 604214501Srpaulo data->final_result = 0; 605214501Srpaulo else 606214501Srpaulo data->final_result = 1; 607214501Srpaulo 608214501Srpaulo if (!data->final_result || data->eap_seq > 1) { 609214501Srpaulo /* Intermediate-Result */ 610214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Add Intermediate-Result TLV " 611214501Srpaulo "(status=SUCCESS)"); 612214501Srpaulo result = wpabuf_put(buf, sizeof(*result)); 613214501Srpaulo result->tlv_type = host_to_be16( 614214501Srpaulo EAP_TLV_TYPE_MANDATORY | 615214501Srpaulo EAP_TLV_INTERMEDIATE_RESULT_TLV); 616214501Srpaulo result->length = host_to_be16(2); 617214501Srpaulo result->status = host_to_be16(EAP_TLV_RESULT_SUCCESS); 618214501Srpaulo } 619214501Srpaulo 620214501Srpaulo if (data->final_result) { 621214501Srpaulo /* Result TLV */ 622214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Add Result TLV " 623214501Srpaulo "(status=SUCCESS)"); 624214501Srpaulo result = wpabuf_put(buf, sizeof(*result)); 625214501Srpaulo result->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY | 626214501Srpaulo EAP_TLV_RESULT_TLV); 627214501Srpaulo result->length = host_to_be16(2); 628214501Srpaulo result->status = host_to_be16(EAP_TLV_RESULT_SUCCESS); 629214501Srpaulo } 630214501Srpaulo 631214501Srpaulo /* Crypto-Binding TLV */ 632214501Srpaulo binding = wpabuf_put(buf, sizeof(*binding)); 633214501Srpaulo binding->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY | 634214501Srpaulo EAP_TLV_CRYPTO_BINDING_TLV); 635214501Srpaulo binding->length = host_to_be16(sizeof(*binding) - 636214501Srpaulo sizeof(struct eap_tlv_hdr)); 637214501Srpaulo binding->version = EAP_FAST_VERSION; 638214501Srpaulo binding->received_version = data->peer_version; 639214501Srpaulo binding->subtype = EAP_TLV_CRYPTO_BINDING_SUBTYPE_REQUEST; 640252726Srpaulo if (random_get_bytes(binding->nonce, sizeof(binding->nonce)) < 0) { 641214501Srpaulo wpabuf_free(buf); 642214501Srpaulo return NULL; 643214501Srpaulo } 644214501Srpaulo 645214501Srpaulo /* 646214501Srpaulo * RFC 4851, Section 4.2.8: 647214501Srpaulo * The nonce in a request MUST have its least significant bit set to 0. 648214501Srpaulo */ 649214501Srpaulo binding->nonce[sizeof(binding->nonce) - 1] &= ~0x01; 650214501Srpaulo 651214501Srpaulo os_memcpy(data->crypto_binding_nonce, binding->nonce, 652214501Srpaulo sizeof(binding->nonce)); 653214501Srpaulo 654214501Srpaulo /* 655214501Srpaulo * RFC 4851, Section 5.3: 656214501Srpaulo * CMK = CMK[j] 657214501Srpaulo * Compound-MAC = HMAC-SHA1( CMK, Crypto-Binding TLV ) 658214501Srpaulo */ 659214501Srpaulo 660214501Srpaulo hmac_sha1(data->cmk, EAP_FAST_CMK_LEN, 661214501Srpaulo (u8 *) binding, sizeof(*binding), 662214501Srpaulo binding->compound_mac); 663214501Srpaulo 664214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Add Crypto-Binding TLV: Version %d " 665214501Srpaulo "Received Version %d SubType %d", 666214501Srpaulo binding->version, binding->received_version, 667214501Srpaulo binding->subtype); 668214501Srpaulo wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: NONCE", 669214501Srpaulo binding->nonce, sizeof(binding->nonce)); 670214501Srpaulo wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Compound MAC", 671214501Srpaulo binding->compound_mac, sizeof(binding->compound_mac)); 672214501Srpaulo 673214501Srpaulo return buf; 674214501Srpaulo} 675214501Srpaulo 676214501Srpaulo 677214501Srpaulostatic struct wpabuf * eap_fast_build_pac(struct eap_sm *sm, 678214501Srpaulo struct eap_fast_data *data) 679214501Srpaulo{ 680214501Srpaulo u8 pac_key[EAP_FAST_PAC_KEY_LEN]; 681214501Srpaulo u8 *pac_buf, *pac_opaque; 682214501Srpaulo struct wpabuf *buf; 683214501Srpaulo u8 *pos; 684214501Srpaulo size_t buf_len, srv_id_info_len, pac_len; 685214501Srpaulo struct eap_tlv_hdr *pac_tlv; 686214501Srpaulo struct pac_tlv_hdr *pac_info; 687214501Srpaulo struct eap_tlv_result_tlv *result; 688214501Srpaulo struct os_time now; 689214501Srpaulo 690252726Srpaulo if (random_get_bytes(pac_key, EAP_FAST_PAC_KEY_LEN) < 0 || 691214501Srpaulo os_get_time(&now) < 0) 692214501Srpaulo return NULL; 693214501Srpaulo wpa_hexdump_key(MSG_DEBUG, "EAP-FAST: Generated PAC-Key", 694214501Srpaulo pac_key, EAP_FAST_PAC_KEY_LEN); 695214501Srpaulo 696214501Srpaulo pac_len = (2 + EAP_FAST_PAC_KEY_LEN) + (2 + 4) + 697214501Srpaulo (2 + sm->identity_len) + 8; 698214501Srpaulo pac_buf = os_malloc(pac_len); 699214501Srpaulo if (pac_buf == NULL) 700214501Srpaulo return NULL; 701214501Srpaulo 702214501Srpaulo srv_id_info_len = os_strlen(data->srv_id_info); 703214501Srpaulo 704214501Srpaulo pos = pac_buf; 705214501Srpaulo *pos++ = PAC_OPAQUE_TYPE_KEY; 706214501Srpaulo *pos++ = EAP_FAST_PAC_KEY_LEN; 707214501Srpaulo os_memcpy(pos, pac_key, EAP_FAST_PAC_KEY_LEN); 708214501Srpaulo pos += EAP_FAST_PAC_KEY_LEN; 709214501Srpaulo 710214501Srpaulo *pos++ = PAC_OPAQUE_TYPE_LIFETIME; 711214501Srpaulo *pos++ = 4; 712214501Srpaulo WPA_PUT_BE32(pos, now.sec + data->pac_key_lifetime); 713214501Srpaulo pos += 4; 714214501Srpaulo 715214501Srpaulo if (sm->identity) { 716214501Srpaulo *pos++ = PAC_OPAQUE_TYPE_IDENTITY; 717214501Srpaulo *pos++ = sm->identity_len; 718214501Srpaulo os_memcpy(pos, sm->identity, sm->identity_len); 719214501Srpaulo pos += sm->identity_len; 720214501Srpaulo } 721214501Srpaulo 722214501Srpaulo pac_len = pos - pac_buf; 723214501Srpaulo while (pac_len % 8) { 724214501Srpaulo *pos++ = PAC_OPAQUE_TYPE_PAD; 725214501Srpaulo pac_len++; 726214501Srpaulo } 727214501Srpaulo 728214501Srpaulo pac_opaque = os_malloc(pac_len + 8); 729214501Srpaulo if (pac_opaque == NULL) { 730214501Srpaulo os_free(pac_buf); 731214501Srpaulo return NULL; 732214501Srpaulo } 733214501Srpaulo if (aes_wrap(data->pac_opaque_encr, pac_len / 8, pac_buf, 734214501Srpaulo pac_opaque) < 0) { 735214501Srpaulo os_free(pac_buf); 736214501Srpaulo os_free(pac_opaque); 737214501Srpaulo return NULL; 738214501Srpaulo } 739214501Srpaulo os_free(pac_buf); 740214501Srpaulo 741214501Srpaulo pac_len += 8; 742214501Srpaulo wpa_hexdump(MSG_DEBUG, "EAP-FAST: PAC-Opaque", 743214501Srpaulo pac_opaque, pac_len); 744214501Srpaulo 745214501Srpaulo buf_len = sizeof(*pac_tlv) + 746214501Srpaulo sizeof(struct pac_tlv_hdr) + EAP_FAST_PAC_KEY_LEN + 747214501Srpaulo sizeof(struct pac_tlv_hdr) + pac_len + 748214501Srpaulo data->srv_id_len + srv_id_info_len + 100 + sizeof(*result); 749214501Srpaulo buf = wpabuf_alloc(buf_len); 750214501Srpaulo if (buf == NULL) { 751214501Srpaulo os_free(pac_opaque); 752214501Srpaulo return NULL; 753214501Srpaulo } 754214501Srpaulo 755214501Srpaulo /* Result TLV */ 756214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Add Result TLV (status=SUCCESS)"); 757214501Srpaulo result = wpabuf_put(buf, sizeof(*result)); 758214501Srpaulo WPA_PUT_BE16((u8 *) &result->tlv_type, 759214501Srpaulo EAP_TLV_TYPE_MANDATORY | EAP_TLV_RESULT_TLV); 760214501Srpaulo WPA_PUT_BE16((u8 *) &result->length, 2); 761214501Srpaulo WPA_PUT_BE16((u8 *) &result->status, EAP_TLV_RESULT_SUCCESS); 762214501Srpaulo 763214501Srpaulo /* PAC TLV */ 764214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Add PAC TLV"); 765214501Srpaulo pac_tlv = wpabuf_put(buf, sizeof(*pac_tlv)); 766214501Srpaulo pac_tlv->tlv_type = host_to_be16(EAP_TLV_TYPE_MANDATORY | 767214501Srpaulo EAP_TLV_PAC_TLV); 768214501Srpaulo 769214501Srpaulo /* PAC-Key */ 770214501Srpaulo eap_fast_put_tlv(buf, PAC_TYPE_PAC_KEY, pac_key, EAP_FAST_PAC_KEY_LEN); 771214501Srpaulo 772214501Srpaulo /* PAC-Opaque */ 773214501Srpaulo eap_fast_put_tlv(buf, PAC_TYPE_PAC_OPAQUE, pac_opaque, pac_len); 774214501Srpaulo os_free(pac_opaque); 775214501Srpaulo 776214501Srpaulo /* PAC-Info */ 777214501Srpaulo pac_info = wpabuf_put(buf, sizeof(*pac_info)); 778214501Srpaulo pac_info->type = host_to_be16(PAC_TYPE_PAC_INFO); 779214501Srpaulo 780214501Srpaulo /* PAC-Lifetime (inside PAC-Info) */ 781214501Srpaulo eap_fast_put_tlv_hdr(buf, PAC_TYPE_CRED_LIFETIME, 4); 782214501Srpaulo wpabuf_put_be32(buf, now.sec + data->pac_key_lifetime); 783214501Srpaulo 784214501Srpaulo /* A-ID (inside PAC-Info) */ 785214501Srpaulo eap_fast_put_tlv(buf, PAC_TYPE_A_ID, data->srv_id, data->srv_id_len); 786214501Srpaulo 787214501Srpaulo /* Note: headers may be misaligned after A-ID */ 788214501Srpaulo 789214501Srpaulo if (sm->identity) { 790214501Srpaulo eap_fast_put_tlv(buf, PAC_TYPE_I_ID, sm->identity, 791214501Srpaulo sm->identity_len); 792214501Srpaulo } 793214501Srpaulo 794214501Srpaulo /* A-ID-Info (inside PAC-Info) */ 795214501Srpaulo eap_fast_put_tlv(buf, PAC_TYPE_A_ID_INFO, data->srv_id_info, 796214501Srpaulo srv_id_info_len); 797214501Srpaulo 798214501Srpaulo /* PAC-Type (inside PAC-Info) */ 799214501Srpaulo eap_fast_put_tlv_hdr(buf, PAC_TYPE_PAC_TYPE, 2); 800214501Srpaulo wpabuf_put_be16(buf, PAC_TYPE_TUNNEL_PAC); 801214501Srpaulo 802214501Srpaulo /* Update PAC-Info and PAC TLV Length fields */ 803214501Srpaulo pos = wpabuf_put(buf, 0); 804214501Srpaulo pac_info->len = host_to_be16(pos - (u8 *) (pac_info + 1)); 805214501Srpaulo pac_tlv->length = host_to_be16(pos - (u8 *) (pac_tlv + 1)); 806214501Srpaulo 807214501Srpaulo return buf; 808214501Srpaulo} 809214501Srpaulo 810214501Srpaulo 811214501Srpaulostatic int eap_fast_encrypt_phase2(struct eap_sm *sm, 812214501Srpaulo struct eap_fast_data *data, 813214501Srpaulo struct wpabuf *plain, int piggyback) 814214501Srpaulo{ 815214501Srpaulo struct wpabuf *encr; 816214501Srpaulo 817214501Srpaulo wpa_hexdump_buf_key(MSG_DEBUG, "EAP-FAST: Encrypting Phase 2 TLVs", 818214501Srpaulo plain); 819214501Srpaulo encr = eap_server_tls_encrypt(sm, &data->ssl, plain); 820214501Srpaulo wpabuf_free(plain); 821214501Srpaulo 822214501Srpaulo if (data->ssl.tls_out && piggyback) { 823214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Piggyback Phase 2 data " 824214501Srpaulo "(len=%d) with last Phase 1 Message (len=%d " 825214501Srpaulo "used=%d)", 826214501Srpaulo (int) wpabuf_len(encr), 827214501Srpaulo (int) wpabuf_len(data->ssl.tls_out), 828214501Srpaulo (int) data->ssl.tls_out_pos); 829214501Srpaulo if (wpabuf_resize(&data->ssl.tls_out, wpabuf_len(encr)) < 0) { 830214501Srpaulo wpa_printf(MSG_WARNING, "EAP-FAST: Failed to resize " 831214501Srpaulo "output buffer"); 832214501Srpaulo wpabuf_free(encr); 833214501Srpaulo return -1; 834214501Srpaulo } 835214501Srpaulo wpabuf_put_buf(data->ssl.tls_out, encr); 836214501Srpaulo wpabuf_free(encr); 837214501Srpaulo } else { 838214501Srpaulo wpabuf_free(data->ssl.tls_out); 839214501Srpaulo data->ssl.tls_out_pos = 0; 840214501Srpaulo data->ssl.tls_out = encr; 841214501Srpaulo } 842214501Srpaulo 843214501Srpaulo return 0; 844214501Srpaulo} 845214501Srpaulo 846214501Srpaulo 847214501Srpaulostatic struct wpabuf * eap_fast_buildReq(struct eap_sm *sm, void *priv, u8 id) 848214501Srpaulo{ 849214501Srpaulo struct eap_fast_data *data = priv; 850214501Srpaulo struct wpabuf *req = NULL; 851214501Srpaulo int piggyback = 0; 852214501Srpaulo 853214501Srpaulo if (data->ssl.state == FRAG_ACK) { 854214501Srpaulo return eap_server_tls_build_ack(id, EAP_TYPE_FAST, 855214501Srpaulo data->fast_version); 856214501Srpaulo } 857214501Srpaulo 858214501Srpaulo if (data->ssl.state == WAIT_FRAG_ACK) { 859214501Srpaulo return eap_server_tls_build_msg(&data->ssl, EAP_TYPE_FAST, 860214501Srpaulo data->fast_version, id); 861214501Srpaulo } 862214501Srpaulo 863214501Srpaulo switch (data->state) { 864214501Srpaulo case START: 865214501Srpaulo return eap_fast_build_start(sm, data, id); 866214501Srpaulo case PHASE1: 867214501Srpaulo if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) { 868214501Srpaulo if (eap_fast_phase1_done(sm, data) < 0) 869214501Srpaulo return NULL; 870214501Srpaulo if (data->state == PHASE2_START) { 871214501Srpaulo /* 872214501Srpaulo * Try to generate Phase 2 data to piggyback 873214501Srpaulo * with the end of Phase 1 to avoid extra 874214501Srpaulo * roundtrip. 875214501Srpaulo */ 876214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Try to start " 877214501Srpaulo "Phase 2"); 878214501Srpaulo if (eap_fast_process_phase2_start(sm, data)) 879214501Srpaulo break; 880214501Srpaulo req = eap_fast_build_phase2_req(sm, data, id); 881214501Srpaulo piggyback = 1; 882214501Srpaulo } 883214501Srpaulo } 884214501Srpaulo break; 885214501Srpaulo case PHASE2_ID: 886214501Srpaulo case PHASE2_METHOD: 887214501Srpaulo req = eap_fast_build_phase2_req(sm, data, id); 888214501Srpaulo break; 889214501Srpaulo case CRYPTO_BINDING: 890214501Srpaulo req = eap_fast_build_crypto_binding(sm, data); 891214501Srpaulo if (data->phase2_method) { 892214501Srpaulo /* 893214501Srpaulo * Include the start of the next EAP method in the 894214501Srpaulo * sequence in the same message with Crypto-Binding to 895214501Srpaulo * save a round-trip. 896214501Srpaulo */ 897214501Srpaulo struct wpabuf *eap; 898214501Srpaulo eap = eap_fast_build_phase2_req(sm, data, id); 899214501Srpaulo req = wpabuf_concat(req, eap); 900214501Srpaulo eap_fast_state(data, PHASE2_METHOD); 901214501Srpaulo } 902214501Srpaulo break; 903214501Srpaulo case REQUEST_PAC: 904214501Srpaulo req = eap_fast_build_pac(sm, data); 905214501Srpaulo break; 906214501Srpaulo default: 907214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: %s - unexpected state %d", 908214501Srpaulo __func__, data->state); 909214501Srpaulo return NULL; 910214501Srpaulo } 911214501Srpaulo 912214501Srpaulo if (req && 913214501Srpaulo eap_fast_encrypt_phase2(sm, data, req, piggyback) < 0) 914214501Srpaulo return NULL; 915214501Srpaulo 916214501Srpaulo return eap_server_tls_build_msg(&data->ssl, EAP_TYPE_FAST, 917214501Srpaulo data->fast_version, id); 918214501Srpaulo} 919214501Srpaulo 920214501Srpaulo 921214501Srpaulostatic Boolean eap_fast_check(struct eap_sm *sm, void *priv, 922214501Srpaulo struct wpabuf *respData) 923214501Srpaulo{ 924214501Srpaulo const u8 *pos; 925214501Srpaulo size_t len; 926214501Srpaulo 927214501Srpaulo pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_FAST, respData, &len); 928214501Srpaulo if (pos == NULL || len < 1) { 929214501Srpaulo wpa_printf(MSG_INFO, "EAP-FAST: Invalid frame"); 930214501Srpaulo return TRUE; 931214501Srpaulo } 932214501Srpaulo 933214501Srpaulo return FALSE; 934214501Srpaulo} 935214501Srpaulo 936214501Srpaulo 937214501Srpaulostatic int eap_fast_phase2_init(struct eap_sm *sm, struct eap_fast_data *data, 938214501Srpaulo EapType eap_type) 939214501Srpaulo{ 940214501Srpaulo if (data->phase2_priv && data->phase2_method) { 941214501Srpaulo data->phase2_method->reset(sm, data->phase2_priv); 942214501Srpaulo data->phase2_method = NULL; 943214501Srpaulo data->phase2_priv = NULL; 944214501Srpaulo } 945214501Srpaulo data->phase2_method = eap_server_get_eap_method(EAP_VENDOR_IETF, 946214501Srpaulo eap_type); 947214501Srpaulo if (!data->phase2_method) 948214501Srpaulo return -1; 949214501Srpaulo 950214501Srpaulo if (data->key_block_p) { 951214501Srpaulo sm->auth_challenge = data->key_block_p->server_challenge; 952214501Srpaulo sm->peer_challenge = data->key_block_p->client_challenge; 953214501Srpaulo } 954214501Srpaulo sm->init_phase2 = 1; 955214501Srpaulo data->phase2_priv = data->phase2_method->init(sm); 956214501Srpaulo sm->init_phase2 = 0; 957214501Srpaulo sm->auth_challenge = NULL; 958214501Srpaulo sm->peer_challenge = NULL; 959214501Srpaulo 960214501Srpaulo return data->phase2_priv == NULL ? -1 : 0; 961214501Srpaulo} 962214501Srpaulo 963214501Srpaulo 964214501Srpaulostatic void eap_fast_process_phase2_response(struct eap_sm *sm, 965214501Srpaulo struct eap_fast_data *data, 966214501Srpaulo u8 *in_data, size_t in_len) 967214501Srpaulo{ 968214501Srpaulo u8 next_type = EAP_TYPE_NONE; 969214501Srpaulo struct eap_hdr *hdr; 970214501Srpaulo u8 *pos; 971214501Srpaulo size_t left; 972214501Srpaulo struct wpabuf buf; 973214501Srpaulo const struct eap_method *m = data->phase2_method; 974214501Srpaulo void *priv = data->phase2_priv; 975214501Srpaulo 976214501Srpaulo if (priv == NULL) { 977214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: %s - Phase2 not " 978214501Srpaulo "initialized?!", __func__); 979214501Srpaulo return; 980214501Srpaulo } 981214501Srpaulo 982214501Srpaulo hdr = (struct eap_hdr *) in_data; 983214501Srpaulo pos = (u8 *) (hdr + 1); 984214501Srpaulo 985214501Srpaulo if (in_len > sizeof(*hdr) && *pos == EAP_TYPE_NAK) { 986214501Srpaulo left = in_len - sizeof(*hdr); 987214501Srpaulo wpa_hexdump(MSG_DEBUG, "EAP-FAST: Phase2 type Nak'ed; " 988214501Srpaulo "allowed types", pos + 1, left - 1); 989214501Srpaulo#ifdef EAP_SERVER_TNC 990214501Srpaulo if (m && m->vendor == EAP_VENDOR_IETF && 991214501Srpaulo m->method == EAP_TYPE_TNC) { 992214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Peer Nak'ed required " 993214501Srpaulo "TNC negotiation"); 994214501Srpaulo next_type = eap_fast_req_failure(sm, data); 995214501Srpaulo eap_fast_phase2_init(sm, data, next_type); 996214501Srpaulo return; 997214501Srpaulo } 998214501Srpaulo#endif /* EAP_SERVER_TNC */ 999214501Srpaulo eap_sm_process_nak(sm, pos + 1, left - 1); 1000214501Srpaulo if (sm->user && sm->user_eap_method_index < EAP_MAX_METHODS && 1001214501Srpaulo sm->user->methods[sm->user_eap_method_index].method != 1002214501Srpaulo EAP_TYPE_NONE) { 1003214501Srpaulo next_type = sm->user->methods[ 1004214501Srpaulo sm->user_eap_method_index++].method; 1005214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: try EAP type %d", 1006214501Srpaulo next_type); 1007214501Srpaulo } else { 1008214501Srpaulo next_type = eap_fast_req_failure(sm, data); 1009214501Srpaulo } 1010214501Srpaulo eap_fast_phase2_init(sm, data, next_type); 1011214501Srpaulo return; 1012214501Srpaulo } 1013214501Srpaulo 1014214501Srpaulo wpabuf_set(&buf, in_data, in_len); 1015214501Srpaulo 1016214501Srpaulo if (m->check(sm, priv, &buf)) { 1017214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Phase2 check() asked to " 1018214501Srpaulo "ignore the packet"); 1019214501Srpaulo next_type = eap_fast_req_failure(sm, data); 1020214501Srpaulo return; 1021214501Srpaulo } 1022214501Srpaulo 1023214501Srpaulo m->process(sm, priv, &buf); 1024214501Srpaulo 1025214501Srpaulo if (!m->isDone(sm, priv)) 1026214501Srpaulo return; 1027214501Srpaulo 1028214501Srpaulo if (!m->isSuccess(sm, priv)) { 1029214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Phase2 method failed"); 1030214501Srpaulo next_type = eap_fast_req_failure(sm, data); 1031214501Srpaulo eap_fast_phase2_init(sm, data, next_type); 1032214501Srpaulo return; 1033214501Srpaulo } 1034214501Srpaulo 1035214501Srpaulo switch (data->state) { 1036214501Srpaulo case PHASE2_ID: 1037214501Srpaulo if (eap_user_get(sm, sm->identity, sm->identity_len, 1) != 0) { 1038214501Srpaulo wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: Phase2 " 1039214501Srpaulo "Identity not found in the user " 1040214501Srpaulo "database", 1041214501Srpaulo sm->identity, sm->identity_len); 1042214501Srpaulo next_type = eap_fast_req_failure(sm, data); 1043214501Srpaulo break; 1044214501Srpaulo } 1045214501Srpaulo 1046214501Srpaulo eap_fast_state(data, PHASE2_METHOD); 1047214501Srpaulo if (data->anon_provisioning) { 1048214501Srpaulo /* 1049214501Srpaulo * Only EAP-MSCHAPv2 is allowed for anonymous 1050214501Srpaulo * provisioning. 1051214501Srpaulo */ 1052214501Srpaulo next_type = EAP_TYPE_MSCHAPV2; 1053214501Srpaulo sm->user_eap_method_index = 0; 1054214501Srpaulo } else { 1055214501Srpaulo next_type = sm->user->methods[0].method; 1056214501Srpaulo sm->user_eap_method_index = 1; 1057214501Srpaulo } 1058214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: try EAP type %d", next_type); 1059214501Srpaulo break; 1060214501Srpaulo case PHASE2_METHOD: 1061214501Srpaulo case CRYPTO_BINDING: 1062214501Srpaulo eap_fast_update_icmk(sm, data); 1063214501Srpaulo eap_fast_state(data, CRYPTO_BINDING); 1064214501Srpaulo data->eap_seq++; 1065214501Srpaulo next_type = EAP_TYPE_NONE; 1066214501Srpaulo#ifdef EAP_SERVER_TNC 1067214501Srpaulo if (sm->tnc && !data->tnc_started) { 1068214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Initialize TNC"); 1069214501Srpaulo next_type = EAP_TYPE_TNC; 1070214501Srpaulo data->tnc_started = 1; 1071214501Srpaulo } 1072214501Srpaulo#endif /* EAP_SERVER_TNC */ 1073214501Srpaulo break; 1074214501Srpaulo case FAILURE: 1075214501Srpaulo break; 1076214501Srpaulo default: 1077214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: %s - unexpected state %d", 1078214501Srpaulo __func__, data->state); 1079214501Srpaulo break; 1080214501Srpaulo } 1081214501Srpaulo 1082214501Srpaulo eap_fast_phase2_init(sm, data, next_type); 1083214501Srpaulo} 1084214501Srpaulo 1085214501Srpaulo 1086214501Srpaulostatic void eap_fast_process_phase2_eap(struct eap_sm *sm, 1087214501Srpaulo struct eap_fast_data *data, 1088214501Srpaulo u8 *in_data, size_t in_len) 1089214501Srpaulo{ 1090214501Srpaulo struct eap_hdr *hdr; 1091214501Srpaulo size_t len; 1092214501Srpaulo 1093214501Srpaulo hdr = (struct eap_hdr *) in_data; 1094214501Srpaulo if (in_len < (int) sizeof(*hdr)) { 1095214501Srpaulo wpa_printf(MSG_INFO, "EAP-FAST: Too short Phase 2 " 1096214501Srpaulo "EAP frame (len=%lu)", (unsigned long) in_len); 1097214501Srpaulo eap_fast_req_failure(sm, data); 1098214501Srpaulo return; 1099214501Srpaulo } 1100214501Srpaulo len = be_to_host16(hdr->length); 1101214501Srpaulo if (len > in_len) { 1102214501Srpaulo wpa_printf(MSG_INFO, "EAP-FAST: Length mismatch in " 1103214501Srpaulo "Phase 2 EAP frame (len=%lu hdr->length=%lu)", 1104214501Srpaulo (unsigned long) in_len, (unsigned long) len); 1105214501Srpaulo eap_fast_req_failure(sm, data); 1106214501Srpaulo return; 1107214501Srpaulo } 1108214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Received Phase 2: code=%d " 1109214501Srpaulo "identifier=%d length=%lu", hdr->code, hdr->identifier, 1110214501Srpaulo (unsigned long) len); 1111214501Srpaulo switch (hdr->code) { 1112214501Srpaulo case EAP_CODE_RESPONSE: 1113214501Srpaulo eap_fast_process_phase2_response(sm, data, (u8 *) hdr, len); 1114214501Srpaulo break; 1115214501Srpaulo default: 1116214501Srpaulo wpa_printf(MSG_INFO, "EAP-FAST: Unexpected code=%d in " 1117214501Srpaulo "Phase 2 EAP header", hdr->code); 1118214501Srpaulo break; 1119214501Srpaulo } 1120214501Srpaulo} 1121214501Srpaulo 1122214501Srpaulo 1123214501Srpaulostatic int eap_fast_parse_tlvs(struct wpabuf *data, 1124214501Srpaulo struct eap_fast_tlv_parse *tlv) 1125214501Srpaulo{ 1126214501Srpaulo int mandatory, tlv_type, len, res; 1127214501Srpaulo u8 *pos, *end; 1128214501Srpaulo 1129214501Srpaulo os_memset(tlv, 0, sizeof(*tlv)); 1130214501Srpaulo 1131214501Srpaulo pos = wpabuf_mhead(data); 1132214501Srpaulo end = pos + wpabuf_len(data); 1133214501Srpaulo while (pos + 4 < end) { 1134214501Srpaulo mandatory = pos[0] & 0x80; 1135214501Srpaulo tlv_type = WPA_GET_BE16(pos) & 0x3fff; 1136214501Srpaulo pos += 2; 1137214501Srpaulo len = WPA_GET_BE16(pos); 1138214501Srpaulo pos += 2; 1139214501Srpaulo if (pos + len > end) { 1140214501Srpaulo wpa_printf(MSG_INFO, "EAP-FAST: TLV overflow"); 1141214501Srpaulo return -1; 1142214501Srpaulo } 1143214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Received Phase 2: " 1144214501Srpaulo "TLV type %d length %d%s", 1145214501Srpaulo tlv_type, len, mandatory ? " (mandatory)" : ""); 1146214501Srpaulo 1147214501Srpaulo res = eap_fast_parse_tlv(tlv, tlv_type, pos, len); 1148214501Srpaulo if (res == -2) 1149214501Srpaulo break; 1150214501Srpaulo if (res < 0) { 1151214501Srpaulo if (mandatory) { 1152214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Nak unknown " 1153214501Srpaulo "mandatory TLV type %d", tlv_type); 1154214501Srpaulo /* TODO: generate Nak TLV */ 1155214501Srpaulo break; 1156214501Srpaulo } else { 1157214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Ignored " 1158214501Srpaulo "unknown optional TLV type %d", 1159214501Srpaulo tlv_type); 1160214501Srpaulo } 1161214501Srpaulo } 1162214501Srpaulo 1163214501Srpaulo pos += len; 1164214501Srpaulo } 1165214501Srpaulo 1166214501Srpaulo return 0; 1167214501Srpaulo} 1168214501Srpaulo 1169214501Srpaulo 1170214501Srpaulostatic int eap_fast_validate_crypto_binding( 1171214501Srpaulo struct eap_fast_data *data, struct eap_tlv_crypto_binding_tlv *b, 1172214501Srpaulo size_t bind_len) 1173214501Srpaulo{ 1174214501Srpaulo u8 cmac[SHA1_MAC_LEN]; 1175214501Srpaulo 1176214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Reply Crypto-Binding TLV: " 1177214501Srpaulo "Version %d Received Version %d SubType %d", 1178214501Srpaulo b->version, b->received_version, b->subtype); 1179214501Srpaulo wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: NONCE", 1180214501Srpaulo b->nonce, sizeof(b->nonce)); 1181214501Srpaulo wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Compound MAC", 1182214501Srpaulo b->compound_mac, sizeof(b->compound_mac)); 1183214501Srpaulo 1184214501Srpaulo if (b->version != EAP_FAST_VERSION || 1185214501Srpaulo b->received_version != EAP_FAST_VERSION) { 1186214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Unexpected version " 1187214501Srpaulo "in Crypto-Binding: version %d " 1188214501Srpaulo "received_version %d", b->version, 1189214501Srpaulo b->received_version); 1190214501Srpaulo return -1; 1191214501Srpaulo } 1192214501Srpaulo 1193214501Srpaulo if (b->subtype != EAP_TLV_CRYPTO_BINDING_SUBTYPE_RESPONSE) { 1194214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Unexpected subtype in " 1195214501Srpaulo "Crypto-Binding: %d", b->subtype); 1196214501Srpaulo return -1; 1197214501Srpaulo } 1198214501Srpaulo 1199214501Srpaulo if (os_memcmp(data->crypto_binding_nonce, b->nonce, 31) != 0 || 1200214501Srpaulo (data->crypto_binding_nonce[31] | 1) != b->nonce[31]) { 1201214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Invalid nonce in " 1202214501Srpaulo "Crypto-Binding"); 1203214501Srpaulo return -1; 1204214501Srpaulo } 1205214501Srpaulo 1206214501Srpaulo os_memcpy(cmac, b->compound_mac, sizeof(cmac)); 1207214501Srpaulo os_memset(b->compound_mac, 0, sizeof(cmac)); 1208214501Srpaulo wpa_hexdump(MSG_MSGDUMP, "EAP-FAST: Crypto-Binding TLV for " 1209214501Srpaulo "Compound MAC calculation", 1210214501Srpaulo (u8 *) b, bind_len); 1211214501Srpaulo hmac_sha1(data->cmk, EAP_FAST_CMK_LEN, (u8 *) b, bind_len, 1212214501Srpaulo b->compound_mac); 1213214501Srpaulo if (os_memcmp(cmac, b->compound_mac, sizeof(cmac)) != 0) { 1214214501Srpaulo wpa_hexdump(MSG_MSGDUMP, 1215214501Srpaulo "EAP-FAST: Calculated Compound MAC", 1216214501Srpaulo b->compound_mac, sizeof(cmac)); 1217214501Srpaulo wpa_printf(MSG_INFO, "EAP-FAST: Compound MAC did not " 1218214501Srpaulo "match"); 1219214501Srpaulo return -1; 1220214501Srpaulo } 1221214501Srpaulo 1222214501Srpaulo return 0; 1223214501Srpaulo} 1224214501Srpaulo 1225214501Srpaulo 1226214501Srpaulostatic int eap_fast_pac_type(u8 *pac, size_t len, u16 type) 1227214501Srpaulo{ 1228214501Srpaulo struct eap_tlv_pac_type_tlv *tlv; 1229214501Srpaulo 1230214501Srpaulo if (pac == NULL || len != sizeof(*tlv)) 1231214501Srpaulo return 0; 1232214501Srpaulo 1233214501Srpaulo tlv = (struct eap_tlv_pac_type_tlv *) pac; 1234214501Srpaulo 1235214501Srpaulo return be_to_host16(tlv->tlv_type) == PAC_TYPE_PAC_TYPE && 1236214501Srpaulo be_to_host16(tlv->length) == 2 && 1237214501Srpaulo be_to_host16(tlv->pac_type) == type; 1238214501Srpaulo} 1239214501Srpaulo 1240214501Srpaulo 1241214501Srpaulostatic void eap_fast_process_phase2_tlvs(struct eap_sm *sm, 1242214501Srpaulo struct eap_fast_data *data, 1243214501Srpaulo struct wpabuf *in_data) 1244214501Srpaulo{ 1245214501Srpaulo struct eap_fast_tlv_parse tlv; 1246214501Srpaulo int check_crypto_binding = data->state == CRYPTO_BINDING; 1247214501Srpaulo 1248214501Srpaulo if (eap_fast_parse_tlvs(in_data, &tlv) < 0) { 1249214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Failed to parse received " 1250214501Srpaulo "Phase 2 TLVs"); 1251214501Srpaulo return; 1252214501Srpaulo } 1253214501Srpaulo 1254214501Srpaulo if (tlv.result == EAP_TLV_RESULT_FAILURE) { 1255214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Result TLV indicated " 1256214501Srpaulo "failure"); 1257214501Srpaulo eap_fast_state(data, FAILURE); 1258214501Srpaulo return; 1259214501Srpaulo } 1260214501Srpaulo 1261214501Srpaulo if (data->state == REQUEST_PAC) { 1262214501Srpaulo u16 type, len, res; 1263214501Srpaulo if (tlv.pac == NULL || tlv.pac_len < 6) { 1264214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: No PAC " 1265214501Srpaulo "Acknowledgement received"); 1266214501Srpaulo eap_fast_state(data, FAILURE); 1267214501Srpaulo return; 1268214501Srpaulo } 1269214501Srpaulo 1270214501Srpaulo type = WPA_GET_BE16(tlv.pac); 1271214501Srpaulo len = WPA_GET_BE16(tlv.pac + 2); 1272214501Srpaulo res = WPA_GET_BE16(tlv.pac + 4); 1273214501Srpaulo 1274214501Srpaulo if (type != PAC_TYPE_PAC_ACKNOWLEDGEMENT || len != 2 || 1275214501Srpaulo res != EAP_TLV_RESULT_SUCCESS) { 1276214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: PAC TLV did not " 1277214501Srpaulo "contain acknowledgement"); 1278214501Srpaulo eap_fast_state(data, FAILURE); 1279214501Srpaulo return; 1280214501Srpaulo } 1281214501Srpaulo 1282214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: PAC-Acknowledgement received " 1283214501Srpaulo "- PAC provisioning succeeded"); 1284214501Srpaulo eap_fast_state(data, (data->anon_provisioning || 1285214501Srpaulo data->send_new_pac == 2) ? 1286214501Srpaulo FAILURE : SUCCESS); 1287214501Srpaulo return; 1288214501Srpaulo } 1289214501Srpaulo 1290214501Srpaulo if (check_crypto_binding) { 1291214501Srpaulo if (tlv.crypto_binding == NULL) { 1292214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: No Crypto-Binding " 1293214501Srpaulo "TLV received"); 1294214501Srpaulo eap_fast_state(data, FAILURE); 1295214501Srpaulo return; 1296214501Srpaulo } 1297214501Srpaulo 1298214501Srpaulo if (data->final_result && 1299214501Srpaulo tlv.result != EAP_TLV_RESULT_SUCCESS) { 1300214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Crypto-Binding TLV " 1301214501Srpaulo "without Success Result"); 1302214501Srpaulo eap_fast_state(data, FAILURE); 1303214501Srpaulo return; 1304214501Srpaulo } 1305214501Srpaulo 1306214501Srpaulo if (!data->final_result && 1307214501Srpaulo tlv.iresult != EAP_TLV_RESULT_SUCCESS) { 1308214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Crypto-Binding TLV " 1309214501Srpaulo "without intermediate Success Result"); 1310214501Srpaulo eap_fast_state(data, FAILURE); 1311214501Srpaulo return; 1312214501Srpaulo } 1313214501Srpaulo 1314214501Srpaulo if (eap_fast_validate_crypto_binding(data, tlv.crypto_binding, 1315214501Srpaulo tlv.crypto_binding_len)) { 1316214501Srpaulo eap_fast_state(data, FAILURE); 1317214501Srpaulo return; 1318214501Srpaulo } 1319214501Srpaulo 1320214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Valid Crypto-Binding TLV " 1321214501Srpaulo "received"); 1322214501Srpaulo if (data->final_result) { 1323214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Authentication " 1324214501Srpaulo "completed successfully"); 1325214501Srpaulo } 1326214501Srpaulo 1327214501Srpaulo if (data->anon_provisioning && 1328214501Srpaulo sm->eap_fast_prov != ANON_PROV && 1329214501Srpaulo sm->eap_fast_prov != BOTH_PROV) { 1330214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Client is trying to " 1331214501Srpaulo "use unauthenticated provisioning which is " 1332214501Srpaulo "disabled"); 1333214501Srpaulo eap_fast_state(data, FAILURE); 1334214501Srpaulo return; 1335214501Srpaulo } 1336214501Srpaulo 1337214501Srpaulo if (sm->eap_fast_prov != AUTH_PROV && 1338214501Srpaulo sm->eap_fast_prov != BOTH_PROV && 1339214501Srpaulo tlv.request_action == EAP_TLV_ACTION_PROCESS_TLV && 1340214501Srpaulo eap_fast_pac_type(tlv.pac, tlv.pac_len, 1341214501Srpaulo PAC_TYPE_TUNNEL_PAC)) { 1342214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Client is trying to " 1343214501Srpaulo "use authenticated provisioning which is " 1344214501Srpaulo "disabled"); 1345214501Srpaulo eap_fast_state(data, FAILURE); 1346214501Srpaulo return; 1347214501Srpaulo } 1348214501Srpaulo 1349214501Srpaulo if (data->anon_provisioning || 1350214501Srpaulo (tlv.request_action == EAP_TLV_ACTION_PROCESS_TLV && 1351214501Srpaulo eap_fast_pac_type(tlv.pac, tlv.pac_len, 1352214501Srpaulo PAC_TYPE_TUNNEL_PAC))) { 1353214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Requested a new " 1354214501Srpaulo "Tunnel PAC"); 1355214501Srpaulo eap_fast_state(data, REQUEST_PAC); 1356214501Srpaulo } else if (data->send_new_pac) { 1357214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Server triggered " 1358214501Srpaulo "re-keying of Tunnel PAC"); 1359214501Srpaulo eap_fast_state(data, REQUEST_PAC); 1360214501Srpaulo } else if (data->final_result) 1361214501Srpaulo eap_fast_state(data, SUCCESS); 1362214501Srpaulo } 1363214501Srpaulo 1364214501Srpaulo if (tlv.eap_payload_tlv) { 1365214501Srpaulo eap_fast_process_phase2_eap(sm, data, tlv.eap_payload_tlv, 1366214501Srpaulo tlv.eap_payload_tlv_len); 1367214501Srpaulo } 1368214501Srpaulo} 1369214501Srpaulo 1370214501Srpaulo 1371214501Srpaulostatic void eap_fast_process_phase2(struct eap_sm *sm, 1372214501Srpaulo struct eap_fast_data *data, 1373214501Srpaulo struct wpabuf *in_buf) 1374214501Srpaulo{ 1375214501Srpaulo struct wpabuf *in_decrypted; 1376214501Srpaulo 1377214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Received %lu bytes encrypted data for" 1378214501Srpaulo " Phase 2", (unsigned long) wpabuf_len(in_buf)); 1379214501Srpaulo 1380214501Srpaulo if (data->pending_phase2_resp) { 1381214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-PEAP: Pending Phase 2 response - " 1382214501Srpaulo "skip decryption and use old data"); 1383214501Srpaulo eap_fast_process_phase2_tlvs(sm, data, 1384214501Srpaulo data->pending_phase2_resp); 1385214501Srpaulo wpabuf_free(data->pending_phase2_resp); 1386214501Srpaulo data->pending_phase2_resp = NULL; 1387214501Srpaulo return; 1388214501Srpaulo } 1389214501Srpaulo 1390214501Srpaulo in_decrypted = tls_connection_decrypt(sm->ssl_ctx, data->ssl.conn, 1391214501Srpaulo in_buf); 1392214501Srpaulo if (in_decrypted == NULL) { 1393214501Srpaulo wpa_printf(MSG_INFO, "EAP-FAST: Failed to decrypt Phase 2 " 1394214501Srpaulo "data"); 1395214501Srpaulo eap_fast_state(data, FAILURE); 1396214501Srpaulo return; 1397214501Srpaulo } 1398214501Srpaulo 1399214501Srpaulo wpa_hexdump_buf_key(MSG_DEBUG, "EAP-FAST: Decrypted Phase 2 TLVs", 1400214501Srpaulo in_decrypted); 1401214501Srpaulo 1402214501Srpaulo eap_fast_process_phase2_tlvs(sm, data, in_decrypted); 1403214501Srpaulo 1404214501Srpaulo if (sm->method_pending == METHOD_PENDING_WAIT) { 1405214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Phase2 method is in " 1406214501Srpaulo "pending wait state - save decrypted response"); 1407214501Srpaulo wpabuf_free(data->pending_phase2_resp); 1408214501Srpaulo data->pending_phase2_resp = in_decrypted; 1409214501Srpaulo return; 1410214501Srpaulo } 1411214501Srpaulo 1412214501Srpaulo wpabuf_free(in_decrypted); 1413214501Srpaulo} 1414214501Srpaulo 1415214501Srpaulo 1416214501Srpaulostatic int eap_fast_process_version(struct eap_sm *sm, void *priv, 1417214501Srpaulo int peer_version) 1418214501Srpaulo{ 1419214501Srpaulo struct eap_fast_data *data = priv; 1420214501Srpaulo 1421214501Srpaulo data->peer_version = peer_version; 1422214501Srpaulo 1423214501Srpaulo if (data->force_version >= 0 && peer_version != data->force_version) { 1424214501Srpaulo wpa_printf(MSG_INFO, "EAP-FAST: peer did not select the forced" 1425214501Srpaulo " version (forced=%d peer=%d) - reject", 1426214501Srpaulo data->force_version, peer_version); 1427214501Srpaulo return -1; 1428214501Srpaulo } 1429214501Srpaulo 1430214501Srpaulo if (peer_version < data->fast_version) { 1431214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: peer ver=%d, own ver=%d; " 1432214501Srpaulo "use version %d", 1433214501Srpaulo peer_version, data->fast_version, peer_version); 1434214501Srpaulo data->fast_version = peer_version; 1435214501Srpaulo } 1436214501Srpaulo 1437214501Srpaulo return 0; 1438214501Srpaulo} 1439214501Srpaulo 1440214501Srpaulo 1441214501Srpaulostatic int eap_fast_process_phase1(struct eap_sm *sm, 1442214501Srpaulo struct eap_fast_data *data) 1443214501Srpaulo{ 1444214501Srpaulo if (eap_server_tls_phase1(sm, &data->ssl) < 0) { 1445214501Srpaulo wpa_printf(MSG_INFO, "EAP-FAST: TLS processing failed"); 1446214501Srpaulo eap_fast_state(data, FAILURE); 1447214501Srpaulo return -1; 1448214501Srpaulo } 1449214501Srpaulo 1450214501Srpaulo if (!tls_connection_established(sm->ssl_ctx, data->ssl.conn) || 1451214501Srpaulo wpabuf_len(data->ssl.tls_out) > 0) 1452214501Srpaulo return 1; 1453214501Srpaulo 1454214501Srpaulo /* 1455214501Srpaulo * Phase 1 was completed with the received message (e.g., when using 1456214501Srpaulo * abbreviated handshake), so Phase 2 can be started immediately 1457214501Srpaulo * without having to send through an empty message to the peer. 1458214501Srpaulo */ 1459214501Srpaulo 1460214501Srpaulo return eap_fast_phase1_done(sm, data); 1461214501Srpaulo} 1462214501Srpaulo 1463214501Srpaulo 1464214501Srpaulostatic int eap_fast_process_phase2_start(struct eap_sm *sm, 1465214501Srpaulo struct eap_fast_data *data) 1466214501Srpaulo{ 1467214501Srpaulo u8 next_type; 1468214501Srpaulo 1469214501Srpaulo if (data->identity) { 1470214501Srpaulo os_free(sm->identity); 1471214501Srpaulo sm->identity = data->identity; 1472214501Srpaulo data->identity = NULL; 1473214501Srpaulo sm->identity_len = data->identity_len; 1474214501Srpaulo data->identity_len = 0; 1475214501Srpaulo sm->require_identity_match = 1; 1476214501Srpaulo if (eap_user_get(sm, sm->identity, sm->identity_len, 1) != 0) { 1477214501Srpaulo wpa_hexdump_ascii(MSG_DEBUG, "EAP-FAST: " 1478214501Srpaulo "Phase2 Identity not found " 1479214501Srpaulo "in the user database", 1480214501Srpaulo sm->identity, sm->identity_len); 1481214501Srpaulo next_type = eap_fast_req_failure(sm, data); 1482214501Srpaulo } else { 1483214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Identity already " 1484214501Srpaulo "known - skip Phase 2 Identity Request"); 1485214501Srpaulo next_type = sm->user->methods[0].method; 1486214501Srpaulo sm->user_eap_method_index = 1; 1487214501Srpaulo } 1488214501Srpaulo 1489214501Srpaulo eap_fast_state(data, PHASE2_METHOD); 1490214501Srpaulo } else { 1491214501Srpaulo eap_fast_state(data, PHASE2_ID); 1492214501Srpaulo next_type = EAP_TYPE_IDENTITY; 1493214501Srpaulo } 1494214501Srpaulo 1495214501Srpaulo return eap_fast_phase2_init(sm, data, next_type); 1496214501Srpaulo} 1497214501Srpaulo 1498214501Srpaulo 1499214501Srpaulostatic void eap_fast_process_msg(struct eap_sm *sm, void *priv, 1500214501Srpaulo const struct wpabuf *respData) 1501214501Srpaulo{ 1502214501Srpaulo struct eap_fast_data *data = priv; 1503214501Srpaulo 1504214501Srpaulo switch (data->state) { 1505214501Srpaulo case PHASE1: 1506214501Srpaulo if (eap_fast_process_phase1(sm, data)) 1507214501Srpaulo break; 1508214501Srpaulo 1509214501Srpaulo /* fall through to PHASE2_START */ 1510214501Srpaulo case PHASE2_START: 1511214501Srpaulo eap_fast_process_phase2_start(sm, data); 1512214501Srpaulo break; 1513214501Srpaulo case PHASE2_ID: 1514214501Srpaulo case PHASE2_METHOD: 1515214501Srpaulo case CRYPTO_BINDING: 1516214501Srpaulo case REQUEST_PAC: 1517214501Srpaulo eap_fast_process_phase2(sm, data, data->ssl.tls_in); 1518214501Srpaulo break; 1519214501Srpaulo default: 1520214501Srpaulo wpa_printf(MSG_DEBUG, "EAP-FAST: Unexpected state %d in %s", 1521214501Srpaulo data->state, __func__); 1522214501Srpaulo break; 1523214501Srpaulo } 1524214501Srpaulo} 1525214501Srpaulo 1526214501Srpaulo 1527214501Srpaulostatic void eap_fast_process(struct eap_sm *sm, void *priv, 1528214501Srpaulo struct wpabuf *respData) 1529214501Srpaulo{ 1530214501Srpaulo struct eap_fast_data *data = priv; 1531214501Srpaulo if (eap_server_tls_process(sm, &data->ssl, respData, data, 1532214501Srpaulo EAP_TYPE_FAST, eap_fast_process_version, 1533214501Srpaulo eap_fast_process_msg) < 0) 1534214501Srpaulo eap_fast_state(data, FAILURE); 1535214501Srpaulo} 1536214501Srpaulo 1537214501Srpaulo 1538214501Srpaulostatic Boolean eap_fast_isDone(struct eap_sm *sm, void *priv) 1539214501Srpaulo{ 1540214501Srpaulo struct eap_fast_data *data = priv; 1541214501Srpaulo return data->state == SUCCESS || data->state == FAILURE; 1542214501Srpaulo} 1543214501Srpaulo 1544214501Srpaulo 1545214501Srpaulostatic u8 * eap_fast_getKey(struct eap_sm *sm, void *priv, size_t *len) 1546214501Srpaulo{ 1547214501Srpaulo struct eap_fast_data *data = priv; 1548214501Srpaulo u8 *eapKeyData; 1549214501Srpaulo 1550214501Srpaulo if (data->state != SUCCESS) 1551214501Srpaulo return NULL; 1552214501Srpaulo 1553214501Srpaulo eapKeyData = os_malloc(EAP_FAST_KEY_LEN); 1554214501Srpaulo if (eapKeyData == NULL) 1555214501Srpaulo return NULL; 1556214501Srpaulo 1557214501Srpaulo eap_fast_derive_eap_msk(data->simck, eapKeyData); 1558214501Srpaulo *len = EAP_FAST_KEY_LEN; 1559214501Srpaulo 1560214501Srpaulo return eapKeyData; 1561214501Srpaulo} 1562214501Srpaulo 1563214501Srpaulo 1564214501Srpaulostatic u8 * eap_fast_get_emsk(struct eap_sm *sm, void *priv, size_t *len) 1565214501Srpaulo{ 1566214501Srpaulo struct eap_fast_data *data = priv; 1567214501Srpaulo u8 *eapKeyData; 1568214501Srpaulo 1569214501Srpaulo if (data->state != SUCCESS) 1570214501Srpaulo return NULL; 1571214501Srpaulo 1572214501Srpaulo eapKeyData = os_malloc(EAP_EMSK_LEN); 1573214501Srpaulo if (eapKeyData == NULL) 1574214501Srpaulo return NULL; 1575214501Srpaulo 1576214501Srpaulo eap_fast_derive_eap_emsk(data->simck, eapKeyData); 1577214501Srpaulo *len = EAP_EMSK_LEN; 1578214501Srpaulo 1579214501Srpaulo return eapKeyData; 1580214501Srpaulo} 1581214501Srpaulo 1582214501Srpaulo 1583214501Srpaulostatic Boolean eap_fast_isSuccess(struct eap_sm *sm, void *priv) 1584214501Srpaulo{ 1585214501Srpaulo struct eap_fast_data *data = priv; 1586214501Srpaulo return data->state == SUCCESS; 1587214501Srpaulo} 1588214501Srpaulo 1589214501Srpaulo 1590214501Srpauloint eap_server_fast_register(void) 1591214501Srpaulo{ 1592214501Srpaulo struct eap_method *eap; 1593214501Srpaulo int ret; 1594214501Srpaulo 1595214501Srpaulo eap = eap_server_method_alloc(EAP_SERVER_METHOD_INTERFACE_VERSION, 1596214501Srpaulo EAP_VENDOR_IETF, EAP_TYPE_FAST, "FAST"); 1597214501Srpaulo if (eap == NULL) 1598214501Srpaulo return -1; 1599214501Srpaulo 1600214501Srpaulo eap->init = eap_fast_init; 1601214501Srpaulo eap->reset = eap_fast_reset; 1602214501Srpaulo eap->buildReq = eap_fast_buildReq; 1603214501Srpaulo eap->check = eap_fast_check; 1604214501Srpaulo eap->process = eap_fast_process; 1605214501Srpaulo eap->isDone = eap_fast_isDone; 1606214501Srpaulo eap->getKey = eap_fast_getKey; 1607214501Srpaulo eap->get_emsk = eap_fast_get_emsk; 1608214501Srpaulo eap->isSuccess = eap_fast_isSuccess; 1609214501Srpaulo 1610214501Srpaulo ret = eap_server_method_register(eap); 1611214501Srpaulo if (ret) 1612214501Srpaulo eap_server_method_free(eap); 1613214501Srpaulo return ret; 1614214501Srpaulo} 1615