The Android Open Source Project | 845e012 | 2009-03-03 19:31:34 -0800 | [diff] [blame] | 1 | /* |
| 2 | * WPA Supplicant / SSL/TLS interface functions for openssl |
| 3 | * Copyright (c) 2004-2007, Jouni Malinen <j@w1.fi> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License version 2 as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * Alternatively, this software may be distributed under the terms of BSD |
| 10 | * license. |
| 11 | * |
| 12 | * See README and COPYING for more details. |
| 13 | */ |
| 14 | |
| 15 | #include "includes.h" |
| 16 | #include <gnutls/gnutls.h> |
| 17 | #include <gnutls/x509.h> |
| 18 | #ifdef PKCS12_FUNCS |
| 19 | #include <gnutls/pkcs12.h> |
| 20 | #endif /* PKCS12_FUNCS */ |
| 21 | |
| 22 | #ifdef CONFIG_GNUTLS_EXTRA |
| 23 | #if LIBGNUTLS_VERSION_NUMBER >= 0x010302 |
| 24 | #define GNUTLS_IA |
| 25 | #include <gnutls/extra.h> |
| 26 | #if LIBGNUTLS_VERSION_NUMBER == 0x010302 |
| 27 | /* This function is not included in the current gnutls/extra.h even though it |
| 28 | * should be, so define it here as a workaround for the time being. */ |
| 29 | int gnutls_ia_verify_endphase(gnutls_session_t session, char *checksum); |
| 30 | #endif /* LIBGNUTLS_VERSION_NUMBER == 0x010302 */ |
| 31 | #endif /* LIBGNUTLS_VERSION_NUMBER >= 0x010302 */ |
| 32 | #endif /* CONFIG_GNUTLS_EXTRA */ |
| 33 | |
| 34 | #include "common.h" |
| 35 | #include "tls.h" |
| 36 | |
| 37 | |
| 38 | #define TLS_RANDOM_SIZE 32 |
| 39 | #define TLS_MASTER_SIZE 48 |
| 40 | |
| 41 | |
| 42 | #if LIBGNUTLS_VERSION_NUMBER < 0x010302 |
| 43 | /* GnuTLS 1.3.2 added functions for using master secret. Older versions require |
| 44 | * use of internal structures to get the master_secret and |
| 45 | * {server,client}_random. |
| 46 | */ |
| 47 | #define GNUTLS_INTERNAL_STRUCTURE_HACK |
| 48 | #endif /* LIBGNUTLS_VERSION_NUMBER < 0x010302 */ |
| 49 | |
| 50 | |
| 51 | #ifdef GNUTLS_INTERNAL_STRUCTURE_HACK |
| 52 | /* |
| 53 | * It looks like gnutls does not provide access to client/server_random and |
| 54 | * master_key. This is somewhat unfortunate since these are needed for key |
| 55 | * derivation in EAP-{TLS,TTLS,PEAP,FAST}. Workaround for now is a horrible |
| 56 | * hack that copies the gnutls_session_int definition from gnutls_int.h so that |
| 57 | * we can get the needed information. |
| 58 | */ |
| 59 | |
| 60 | typedef u8 uint8; |
| 61 | typedef unsigned char opaque; |
| 62 | typedef struct { |
| 63 | uint8 suite[2]; |
| 64 | } cipher_suite_st; |
| 65 | |
| 66 | typedef struct { |
| 67 | gnutls_connection_end_t entity; |
| 68 | gnutls_kx_algorithm_t kx_algorithm; |
| 69 | gnutls_cipher_algorithm_t read_bulk_cipher_algorithm; |
| 70 | gnutls_mac_algorithm_t read_mac_algorithm; |
| 71 | gnutls_compression_method_t read_compression_algorithm; |
| 72 | gnutls_cipher_algorithm_t write_bulk_cipher_algorithm; |
| 73 | gnutls_mac_algorithm_t write_mac_algorithm; |
| 74 | gnutls_compression_method_t write_compression_algorithm; |
| 75 | cipher_suite_st current_cipher_suite; |
| 76 | opaque master_secret[TLS_MASTER_SIZE]; |
| 77 | opaque client_random[TLS_RANDOM_SIZE]; |
| 78 | opaque server_random[TLS_RANDOM_SIZE]; |
| 79 | /* followed by stuff we are not interested in */ |
| 80 | } security_parameters_st; |
| 81 | |
| 82 | struct gnutls_session_int { |
| 83 | security_parameters_st security_parameters; |
| 84 | /* followed by things we are not interested in */ |
| 85 | }; |
| 86 | #endif /* LIBGNUTLS_VERSION_NUMBER < 0x010302 */ |
| 87 | |
| 88 | static int tls_gnutls_ref_count = 0; |
| 89 | |
| 90 | struct tls_global { |
| 91 | /* Data for session resumption */ |
| 92 | void *session_data; |
| 93 | size_t session_data_size; |
| 94 | |
| 95 | int server; |
| 96 | |
| 97 | int params_set; |
| 98 | gnutls_certificate_credentials_t xcred; |
| 99 | }; |
| 100 | |
| 101 | struct tls_connection { |
| 102 | gnutls_session session; |
| 103 | char *subject_match, *altsubject_match; |
| 104 | int read_alerts, write_alerts, failed; |
| 105 | |
| 106 | u8 *pre_shared_secret; |
| 107 | size_t pre_shared_secret_len; |
| 108 | int established; |
| 109 | int verify_peer; |
| 110 | |
| 111 | u8 *push_buf, *pull_buf, *pull_buf_offset; |
| 112 | size_t push_buf_len, pull_buf_len; |
| 113 | |
| 114 | int params_set; |
| 115 | gnutls_certificate_credentials_t xcred; |
| 116 | |
| 117 | int tls_ia; |
| 118 | int final_phase_finished; |
| 119 | |
| 120 | #ifdef GNUTLS_IA |
| 121 | gnutls_ia_server_credentials_t iacred_srv; |
| 122 | gnutls_ia_client_credentials_t iacred_cli; |
| 123 | |
| 124 | /* Session keys generated in the current phase for inner secret |
| 125 | * permutation before generating/verifying PhaseFinished. */ |
| 126 | u8 *session_keys; |
| 127 | size_t session_keys_len; |
| 128 | |
| 129 | u8 inner_secret[TLS_MASTER_SIZE]; |
| 130 | #endif /* GNUTLS_IA */ |
| 131 | }; |
| 132 | |
| 133 | |
| 134 | static void tls_log_func(int level, const char *msg) |
| 135 | { |
| 136 | char *s, *pos; |
| 137 | if (level == 6 || level == 7) { |
| 138 | /* These levels seem to be mostly I/O debug and msg dumps */ |
| 139 | return; |
| 140 | } |
| 141 | |
| 142 | s = os_strdup(msg); |
| 143 | if (s == NULL) |
| 144 | return; |
| 145 | |
| 146 | pos = s; |
| 147 | while (*pos != '\0') { |
| 148 | if (*pos == '\n') { |
| 149 | *pos = '\0'; |
| 150 | break; |
| 151 | } |
| 152 | pos++; |
| 153 | } |
| 154 | wpa_printf(level > 3 ? MSG_MSGDUMP : MSG_DEBUG, |
| 155 | "gnutls<%d> %s", level, s); |
| 156 | os_free(s); |
| 157 | } |
| 158 | |
| 159 | |
| 160 | extern int wpa_debug_show_keys; |
| 161 | |
| 162 | void * tls_init(const struct tls_config *conf) |
| 163 | { |
| 164 | struct tls_global *global; |
| 165 | |
| 166 | #ifdef GNUTLS_INTERNAL_STRUCTURE_HACK |
| 167 | /* Because of the horrible hack to get master_secret and client/server |
| 168 | * random, we need to make sure that the gnutls version is something |
| 169 | * that is expected to have same structure definition for the session |
| 170 | * data.. */ |
| 171 | const char *ver; |
| 172 | const char *ok_ver[] = { "1.2.3", "1.2.4", "1.2.5", "1.2.6", "1.2.9", |
| 173 | "1.3.2", |
| 174 | NULL }; |
| 175 | int i; |
| 176 | #endif /* GNUTLS_INTERNAL_STRUCTURE_HACK */ |
| 177 | |
| 178 | global = os_zalloc(sizeof(*global)); |
| 179 | if (global == NULL) |
| 180 | return NULL; |
| 181 | |
| 182 | if (tls_gnutls_ref_count == 0 && gnutls_global_init() < 0) { |
| 183 | os_free(global); |
| 184 | return NULL; |
| 185 | } |
| 186 | tls_gnutls_ref_count++; |
| 187 | |
| 188 | #ifdef GNUTLS_INTERNAL_STRUCTURE_HACK |
| 189 | ver = gnutls_check_version(NULL); |
| 190 | if (ver == NULL) { |
| 191 | tls_deinit(global); |
| 192 | return NULL; |
| 193 | } |
| 194 | wpa_printf(MSG_DEBUG, "%s - gnutls version %s", __func__, ver); |
| 195 | for (i = 0; ok_ver[i]; i++) { |
| 196 | if (strcmp(ok_ver[i], ver) == 0) |
| 197 | break; |
| 198 | } |
| 199 | if (ok_ver[i] == NULL) { |
| 200 | wpa_printf(MSG_INFO, "Untested gnutls version %s - this needs " |
| 201 | "to be tested and enabled in tls_gnutls.c", ver); |
| 202 | tls_deinit(global); |
| 203 | return NULL; |
| 204 | } |
| 205 | #endif /* GNUTLS_INTERNAL_STRUCTURE_HACK */ |
| 206 | |
| 207 | gnutls_global_set_log_function(tls_log_func); |
| 208 | if (wpa_debug_show_keys) |
| 209 | gnutls_global_set_log_level(11); |
| 210 | return global; |
| 211 | } |
| 212 | |
| 213 | |
| 214 | void tls_deinit(void *ssl_ctx) |
| 215 | { |
| 216 | struct tls_global *global = ssl_ctx; |
| 217 | if (global) { |
| 218 | if (global->params_set) |
| 219 | gnutls_certificate_free_credentials(global->xcred); |
| 220 | os_free(global->session_data); |
| 221 | os_free(global); |
| 222 | } |
| 223 | |
| 224 | tls_gnutls_ref_count--; |
| 225 | if (tls_gnutls_ref_count == 0) |
| 226 | gnutls_global_deinit(); |
| 227 | } |
| 228 | |
| 229 | |
| 230 | int tls_get_errors(void *ssl_ctx) |
| 231 | { |
| 232 | return 0; |
| 233 | } |
| 234 | |
| 235 | |
| 236 | static ssize_t tls_pull_func(gnutls_transport_ptr ptr, void *buf, |
| 237 | size_t len) |
| 238 | { |
| 239 | struct tls_connection *conn = (struct tls_connection *) ptr; |
| 240 | u8 *end; |
| 241 | if (conn->pull_buf == NULL) { |
| 242 | errno = EWOULDBLOCK; |
| 243 | return -1; |
| 244 | } |
| 245 | |
| 246 | end = conn->pull_buf + conn->pull_buf_len; |
| 247 | if ((size_t) (end - conn->pull_buf_offset) < len) |
| 248 | len = end - conn->pull_buf_offset; |
| 249 | os_memcpy(buf, conn->pull_buf_offset, len); |
| 250 | conn->pull_buf_offset += len; |
| 251 | if (conn->pull_buf_offset == end) { |
| 252 | wpa_printf(MSG_DEBUG, "%s - pull_buf consumed", __func__); |
| 253 | os_free(conn->pull_buf); |
| 254 | conn->pull_buf = conn->pull_buf_offset = NULL; |
| 255 | conn->pull_buf_len = 0; |
| 256 | } else { |
| 257 | wpa_printf(MSG_DEBUG, "%s - %d bytes remaining in pull_buf", |
| 258 | __func__, end - conn->pull_buf_offset); |
| 259 | } |
| 260 | return len; |
| 261 | } |
| 262 | |
| 263 | |
| 264 | static ssize_t tls_push_func(gnutls_transport_ptr ptr, const void *buf, |
| 265 | size_t len) |
| 266 | { |
| 267 | struct tls_connection *conn = (struct tls_connection *) ptr; |
| 268 | u8 *nbuf; |
| 269 | |
| 270 | nbuf = os_realloc(conn->push_buf, conn->push_buf_len + len); |
| 271 | if (nbuf == NULL) { |
| 272 | errno = ENOMEM; |
| 273 | return -1; |
| 274 | } |
| 275 | os_memcpy(nbuf + conn->push_buf_len, buf, len); |
| 276 | conn->push_buf = nbuf; |
| 277 | conn->push_buf_len += len; |
| 278 | |
| 279 | return len; |
| 280 | } |
| 281 | |
| 282 | |
| 283 | static int tls_gnutls_init_session(struct tls_global *global, |
| 284 | struct tls_connection *conn) |
| 285 | { |
| 286 | const int cert_types[2] = { GNUTLS_CRT_X509, 0 }; |
| 287 | const int protos[2] = { GNUTLS_TLS1, 0 }; |
| 288 | int ret; |
| 289 | |
| 290 | ret = gnutls_init(&conn->session, |
| 291 | global->server ? GNUTLS_SERVER : GNUTLS_CLIENT); |
| 292 | if (ret < 0) { |
| 293 | wpa_printf(MSG_INFO, "TLS: Failed to initialize new TLS " |
| 294 | "connection: %s", gnutls_strerror(ret)); |
| 295 | return -1; |
| 296 | } |
| 297 | |
| 298 | ret = gnutls_set_default_priority(conn->session); |
| 299 | if (ret < 0) |
| 300 | goto fail; |
| 301 | |
| 302 | ret = gnutls_certificate_type_set_priority(conn->session, cert_types); |
| 303 | if (ret < 0) |
| 304 | goto fail; |
| 305 | |
| 306 | ret = gnutls_protocol_set_priority(conn->session, protos); |
| 307 | if (ret < 0) |
| 308 | goto fail; |
| 309 | |
| 310 | gnutls_transport_set_pull_function(conn->session, tls_pull_func); |
| 311 | gnutls_transport_set_push_function(conn->session, tls_push_func); |
| 312 | gnutls_transport_set_ptr(conn->session, (gnutls_transport_ptr) conn); |
| 313 | |
| 314 | return 0; |
| 315 | |
| 316 | fail: |
| 317 | wpa_printf(MSG_INFO, "TLS: Failed to setup new TLS connection: %s", |
| 318 | gnutls_strerror(ret)); |
| 319 | gnutls_deinit(conn->session); |
| 320 | return -1; |
| 321 | } |
| 322 | |
| 323 | |
| 324 | struct tls_connection * tls_connection_init(void *ssl_ctx) |
| 325 | { |
| 326 | struct tls_global *global = ssl_ctx; |
| 327 | struct tls_connection *conn; |
| 328 | int ret; |
| 329 | |
| 330 | conn = os_zalloc(sizeof(*conn)); |
| 331 | if (conn == NULL) |
| 332 | return NULL; |
| 333 | |
| 334 | if (tls_gnutls_init_session(global, conn)) { |
| 335 | os_free(conn); |
| 336 | return NULL; |
| 337 | } |
| 338 | |
| 339 | if (global->params_set) { |
| 340 | ret = gnutls_credentials_set(conn->session, |
| 341 | GNUTLS_CRD_CERTIFICATE, |
| 342 | global->xcred); |
| 343 | if (ret < 0) { |
| 344 | wpa_printf(MSG_INFO, "Failed to configure " |
| 345 | "credentials: %s", gnutls_strerror(ret)); |
| 346 | os_free(conn); |
| 347 | return NULL; |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | if (gnutls_certificate_allocate_credentials(&conn->xcred)) { |
| 352 | os_free(conn); |
| 353 | return NULL; |
| 354 | } |
| 355 | |
| 356 | return conn; |
| 357 | } |
| 358 | |
| 359 | |
| 360 | void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn) |
| 361 | { |
| 362 | if (conn == NULL) |
| 363 | return; |
| 364 | |
| 365 | #ifdef GNUTLS_IA |
| 366 | if (conn->iacred_srv) |
| 367 | gnutls_ia_free_server_credentials(conn->iacred_srv); |
| 368 | if (conn->iacred_cli) |
| 369 | gnutls_ia_free_client_credentials(conn->iacred_cli); |
| 370 | if (conn->session_keys) { |
| 371 | os_memset(conn->session_keys, 0, conn->session_keys_len); |
| 372 | os_free(conn->session_keys); |
| 373 | } |
| 374 | #endif /* GNUTLS_IA */ |
| 375 | |
| 376 | gnutls_certificate_free_credentials(conn->xcred); |
| 377 | gnutls_deinit(conn->session); |
| 378 | os_free(conn->pre_shared_secret); |
| 379 | os_free(conn->subject_match); |
| 380 | os_free(conn->altsubject_match); |
| 381 | os_free(conn->push_buf); |
| 382 | os_free(conn->pull_buf); |
| 383 | os_free(conn); |
| 384 | } |
| 385 | |
| 386 | |
| 387 | int tls_connection_established(void *ssl_ctx, struct tls_connection *conn) |
| 388 | { |
| 389 | return conn ? conn->established : 0; |
| 390 | } |
| 391 | |
| 392 | |
| 393 | int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn) |
| 394 | { |
| 395 | struct tls_global *global = ssl_ctx; |
| 396 | int ret; |
| 397 | |
| 398 | if (conn == NULL) |
| 399 | return -1; |
| 400 | |
| 401 | /* Shutdown previous TLS connection without notifying the peer |
| 402 | * because the connection was already terminated in practice |
| 403 | * and "close notify" shutdown alert would confuse AS. */ |
| 404 | gnutls_bye(conn->session, GNUTLS_SHUT_RDWR); |
| 405 | os_free(conn->push_buf); |
| 406 | conn->push_buf = NULL; |
| 407 | conn->push_buf_len = 0; |
| 408 | conn->established = 0; |
| 409 | conn->final_phase_finished = 0; |
| 410 | #ifdef GNUTLS_IA |
| 411 | if (conn->session_keys) { |
| 412 | os_memset(conn->session_keys, 0, conn->session_keys_len); |
| 413 | os_free(conn->session_keys); |
| 414 | } |
| 415 | conn->session_keys_len = 0; |
| 416 | #endif /* GNUTLS_IA */ |
| 417 | |
| 418 | gnutls_deinit(conn->session); |
| 419 | if (tls_gnutls_init_session(global, conn)) { |
| 420 | wpa_printf(MSG_INFO, "GnuTLS: Failed to preparare new session " |
| 421 | "for session resumption use"); |
| 422 | return -1; |
| 423 | } |
| 424 | |
| 425 | ret = gnutls_credentials_set(conn->session, GNUTLS_CRD_CERTIFICATE, |
| 426 | conn->params_set ? conn->xcred : |
| 427 | global->xcred); |
| 428 | if (ret < 0) { |
| 429 | wpa_printf(MSG_INFO, "GnuTLS: Failed to configure credentials " |
| 430 | "for session resumption: %s", gnutls_strerror(ret)); |
| 431 | return -1; |
| 432 | } |
| 433 | |
| 434 | if (global->session_data) { |
| 435 | ret = gnutls_session_set_data(conn->session, |
| 436 | global->session_data, |
| 437 | global->session_data_size); |
| 438 | if (ret < 0) { |
| 439 | wpa_printf(MSG_INFO, "GnuTLS: Failed to set session " |
| 440 | "data: %s", gnutls_strerror(ret)); |
| 441 | return -1; |
| 442 | } |
| 443 | } |
| 444 | |
| 445 | return 0; |
| 446 | } |
| 447 | |
| 448 | |
| 449 | #if 0 |
| 450 | static int tls_match_altsubject(X509 *cert, const char *match) |
| 451 | { |
| 452 | GENERAL_NAME *gen; |
| 453 | char *field, *tmp; |
| 454 | void *ext; |
| 455 | int i, found = 0; |
| 456 | size_t len; |
| 457 | |
| 458 | ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL); |
| 459 | |
| 460 | for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) { |
| 461 | gen = sk_GENERAL_NAME_value(ext, i); |
| 462 | switch (gen->type) { |
| 463 | case GEN_EMAIL: |
| 464 | field = "EMAIL"; |
| 465 | break; |
| 466 | case GEN_DNS: |
| 467 | field = "DNS"; |
| 468 | break; |
| 469 | case GEN_URI: |
| 470 | field = "URI"; |
| 471 | break; |
| 472 | default: |
| 473 | field = NULL; |
| 474 | wpa_printf(MSG_DEBUG, "TLS: altSubjectName: " |
| 475 | "unsupported type=%d", gen->type); |
| 476 | break; |
| 477 | } |
| 478 | |
| 479 | if (!field) |
| 480 | continue; |
| 481 | |
| 482 | wpa_printf(MSG_DEBUG, "TLS: altSubjectName: %s:%s", |
| 483 | field, gen->d.ia5->data); |
| 484 | len = os_strlen(field) + 1 + |
| 485 | strlen((char *) gen->d.ia5->data) + 1; |
| 486 | tmp = os_malloc(len); |
| 487 | if (tmp == NULL) |
| 488 | continue; |
| 489 | snprintf(tmp, len, "%s:%s", field, gen->d.ia5->data); |
| 490 | if (strstr(tmp, match)) |
| 491 | found++; |
| 492 | os_free(tmp); |
| 493 | } |
| 494 | |
| 495 | return found; |
| 496 | } |
| 497 | #endif |
| 498 | |
| 499 | |
| 500 | #if 0 |
| 501 | static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx) |
| 502 | { |
| 503 | char buf[256]; |
| 504 | X509 *err_cert; |
| 505 | int err, depth; |
| 506 | SSL *ssl; |
| 507 | struct tls_connection *conn; |
| 508 | char *match, *altmatch; |
| 509 | |
| 510 | err_cert = X509_STORE_CTX_get_current_cert(x509_ctx); |
| 511 | err = X509_STORE_CTX_get_error(x509_ctx); |
| 512 | depth = X509_STORE_CTX_get_error_depth(x509_ctx); |
| 513 | ssl = X509_STORE_CTX_get_ex_data(x509_ctx, |
| 514 | SSL_get_ex_data_X509_STORE_CTX_idx()); |
| 515 | X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf)); |
| 516 | |
| 517 | conn = SSL_get_app_data(ssl); |
| 518 | match = conn ? conn->subject_match : NULL; |
| 519 | altmatch = conn ? conn->altsubject_match : NULL; |
| 520 | |
| 521 | if (!preverify_ok) { |
| 522 | wpa_printf(MSG_WARNING, "TLS: Certificate verification failed," |
| 523 | " error %d (%s) depth %d for '%s'", err, |
| 524 | X509_verify_cert_error_string(err), depth, buf); |
| 525 | } else { |
| 526 | wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - " |
| 527 | "preverify_ok=%d err=%d (%s) depth=%d buf='%s'", |
| 528 | preverify_ok, err, |
| 529 | X509_verify_cert_error_string(err), depth, buf); |
| 530 | if (depth == 0 && match && strstr(buf, match) == NULL) { |
| 531 | wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not " |
| 532 | "match with '%s'", buf, match); |
| 533 | preverify_ok = 0; |
| 534 | } else if (depth == 0 && altmatch && |
| 535 | !tls_match_altsubject(err_cert, altmatch)) { |
| 536 | wpa_printf(MSG_WARNING, "TLS: altSubjectName match " |
| 537 | "'%s' not found", altmatch); |
| 538 | preverify_ok = 0; |
| 539 | } |
| 540 | } |
| 541 | |
| 542 | return preverify_ok; |
| 543 | } |
| 544 | #endif |
| 545 | |
| 546 | |
| 547 | int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn, |
| 548 | const struct tls_connection_params *params) |
| 549 | { |
| 550 | int ret; |
| 551 | |
| 552 | if (conn == NULL || params == NULL) |
| 553 | return -1; |
| 554 | |
| 555 | os_free(conn->subject_match); |
| 556 | conn->subject_match = NULL; |
| 557 | if (params->subject_match) { |
| 558 | conn->subject_match = os_strdup(params->subject_match); |
| 559 | if (conn->subject_match == NULL) |
| 560 | return -1; |
| 561 | } |
| 562 | |
| 563 | os_free(conn->altsubject_match); |
| 564 | conn->altsubject_match = NULL; |
| 565 | if (params->altsubject_match) { |
| 566 | conn->altsubject_match = os_strdup(params->altsubject_match); |
| 567 | if (conn->altsubject_match == NULL) |
| 568 | return -1; |
| 569 | } |
| 570 | |
| 571 | /* TODO: gnutls_certificate_set_verify_flags(xcred, flags); |
| 572 | * to force peer validation(?) */ |
| 573 | |
| 574 | if (params->ca_cert) { |
| 575 | conn->verify_peer = 1; |
| 576 | ret = gnutls_certificate_set_x509_trust_file( |
| 577 | conn->xcred, params->ca_cert, GNUTLS_X509_FMT_PEM); |
| 578 | if (ret < 0) { |
| 579 | wpa_printf(MSG_DEBUG, "Failed to read CA cert '%s' " |
| 580 | "in PEM format: %s", params->ca_cert, |
| 581 | gnutls_strerror(ret)); |
| 582 | ret = gnutls_certificate_set_x509_trust_file( |
| 583 | conn->xcred, params->ca_cert, |
| 584 | GNUTLS_X509_FMT_DER); |
| 585 | if (ret < 0) { |
| 586 | wpa_printf(MSG_DEBUG, "Failed to read CA cert " |
| 587 | "'%s' in DER format: %s", |
| 588 | params->ca_cert, |
| 589 | gnutls_strerror(ret)); |
| 590 | return -1; |
| 591 | } |
| 592 | } |
| 593 | } |
| 594 | |
| 595 | if (params->client_cert && params->private_key) { |
| 596 | /* TODO: private_key_passwd? */ |
| 597 | ret = gnutls_certificate_set_x509_key_file( |
| 598 | conn->xcred, params->client_cert, params->private_key, |
| 599 | GNUTLS_X509_FMT_PEM); |
| 600 | if (ret < 0) { |
| 601 | wpa_printf(MSG_DEBUG, "Failed to read client cert/key " |
| 602 | "in PEM format: %s", gnutls_strerror(ret)); |
| 603 | ret = gnutls_certificate_set_x509_key_file( |
| 604 | conn->xcred, params->client_cert, |
| 605 | params->private_key, GNUTLS_X509_FMT_DER); |
| 606 | if (ret < 0) { |
| 607 | wpa_printf(MSG_DEBUG, "Failed to read client " |
| 608 | "cert/key in DER format: %s", |
| 609 | gnutls_strerror(ret)); |
| 610 | return ret; |
| 611 | } |
| 612 | } |
| 613 | } else if (params->private_key) { |
| 614 | int pkcs12_ok = 0; |
| 615 | #ifdef PKCS12_FUNCS |
| 616 | /* Try to load in PKCS#12 format */ |
| 617 | #if LIBGNUTLS_VERSION_NUMBER >= 0x010302 |
| 618 | ret = gnutls_certificate_set_x509_simple_pkcs12_file( |
| 619 | conn->xcred, params->private_key, GNUTLS_X509_FMT_DER, |
| 620 | params->private_key_passwd); |
| 621 | if (ret != 0) { |
| 622 | wpa_printf(MSG_DEBUG, "Failed to load private_key in " |
| 623 | "PKCS#12 format: %s", gnutls_strerror(ret)); |
| 624 | return -1; |
| 625 | } else |
| 626 | pkcs12_ok = 1; |
| 627 | #endif /* LIBGNUTLS_VERSION_NUMBER >= 0x010302 */ |
| 628 | #endif /* PKCS12_FUNCS */ |
| 629 | |
| 630 | if (!pkcs12_ok) { |
| 631 | wpa_printf(MSG_DEBUG, "GnuTLS: PKCS#12 support not " |
| 632 | "included"); |
| 633 | return -1; |
| 634 | } |
| 635 | } |
| 636 | |
| 637 | conn->tls_ia = params->tls_ia; |
| 638 | conn->params_set = 1; |
| 639 | |
| 640 | ret = gnutls_credentials_set(conn->session, GNUTLS_CRD_CERTIFICATE, |
| 641 | conn->xcred); |
| 642 | if (ret < 0) { |
| 643 | wpa_printf(MSG_INFO, "Failed to configure credentials: %s", |
| 644 | gnutls_strerror(ret)); |
| 645 | } |
| 646 | |
| 647 | #ifdef GNUTLS_IA |
| 648 | if (conn->iacred_cli) |
| 649 | gnutls_ia_free_client_credentials(conn->iacred_cli); |
| 650 | |
| 651 | ret = gnutls_ia_allocate_client_credentials(&conn->iacred_cli); |
| 652 | if (ret) { |
| 653 | wpa_printf(MSG_DEBUG, "Failed to allocate IA credentials: %s", |
| 654 | gnutls_strerror(ret)); |
| 655 | return -1; |
| 656 | } |
| 657 | |
| 658 | ret = gnutls_credentials_set(conn->session, GNUTLS_CRD_IA, |
| 659 | conn->iacred_cli); |
| 660 | if (ret) { |
| 661 | wpa_printf(MSG_DEBUG, "Failed to configure IA credentials: %s", |
| 662 | gnutls_strerror(ret)); |
| 663 | gnutls_ia_free_client_credentials(conn->iacred_cli); |
| 664 | conn->iacred_cli = NULL; |
| 665 | return -1; |
| 666 | } |
| 667 | #endif /* GNUTLS_IE */ |
| 668 | |
| 669 | return ret; |
| 670 | } |
| 671 | |
| 672 | |
| 673 | int tls_global_set_params(void *tls_ctx, |
| 674 | const struct tls_connection_params *params) |
| 675 | { |
| 676 | struct tls_global *global = tls_ctx; |
| 677 | int ret; |
| 678 | |
| 679 | /* Currently, global parameters are only set when running in server |
| 680 | * mode. */ |
| 681 | global->server = 1; |
| 682 | |
| 683 | if (global->params_set) { |
| 684 | gnutls_certificate_free_credentials(global->xcred); |
| 685 | global->params_set = 0; |
| 686 | } |
| 687 | |
| 688 | ret = gnutls_certificate_allocate_credentials(&global->xcred); |
| 689 | if (ret) { |
| 690 | wpa_printf(MSG_DEBUG, "Failed to allocate global credentials " |
| 691 | "%s", gnutls_strerror(ret)); |
| 692 | return -1; |
| 693 | } |
| 694 | |
| 695 | if (params->ca_cert) { |
| 696 | ret = gnutls_certificate_set_x509_trust_file( |
| 697 | global->xcred, params->ca_cert, GNUTLS_X509_FMT_PEM); |
| 698 | if (ret < 0) { |
| 699 | wpa_printf(MSG_DEBUG, "Failed to read CA cert '%s' " |
| 700 | "in PEM format: %s", params->ca_cert, |
| 701 | gnutls_strerror(ret)); |
| 702 | ret = gnutls_certificate_set_x509_trust_file( |
| 703 | global->xcred, params->ca_cert, |
| 704 | GNUTLS_X509_FMT_DER); |
| 705 | if (ret < 0) { |
| 706 | wpa_printf(MSG_DEBUG, "Failed to read CA cert " |
| 707 | "'%s' in DER format: %s", |
| 708 | params->ca_cert, |
| 709 | gnutls_strerror(ret)); |
| 710 | goto fail; |
| 711 | } |
| 712 | } |
| 713 | } |
| 714 | |
| 715 | if (params->client_cert && params->private_key) { |
| 716 | /* TODO: private_key_passwd? */ |
| 717 | ret = gnutls_certificate_set_x509_key_file( |
| 718 | global->xcred, params->client_cert, |
| 719 | params->private_key, GNUTLS_X509_FMT_PEM); |
| 720 | if (ret < 0) { |
| 721 | wpa_printf(MSG_DEBUG, "Failed to read client cert/key " |
| 722 | "in PEM format: %s", gnutls_strerror(ret)); |
| 723 | ret = gnutls_certificate_set_x509_key_file( |
| 724 | global->xcred, params->client_cert, |
| 725 | params->private_key, GNUTLS_X509_FMT_DER); |
| 726 | if (ret < 0) { |
| 727 | wpa_printf(MSG_DEBUG, "Failed to read client " |
| 728 | "cert/key in DER format: %s", |
| 729 | gnutls_strerror(ret)); |
| 730 | goto fail; |
| 731 | } |
| 732 | } |
| 733 | } else if (params->private_key) { |
| 734 | int pkcs12_ok = 0; |
| 735 | #ifdef PKCS12_FUNCS |
| 736 | /* Try to load in PKCS#12 format */ |
| 737 | #if LIBGNUTLS_VERSION_NUMBER >= 0x010302 |
| 738 | ret = gnutls_certificate_set_x509_simple_pkcs12_file( |
| 739 | global->xcred, params->private_key, |
| 740 | GNUTLS_X509_FMT_DER, params->private_key_passwd); |
| 741 | if (ret != 0) { |
| 742 | wpa_printf(MSG_DEBUG, "Failed to load private_key in " |
| 743 | "PKCS#12 format: %s", gnutls_strerror(ret)); |
| 744 | goto fail; |
| 745 | } else |
| 746 | pkcs12_ok = 1; |
| 747 | #endif /* LIBGNUTLS_VERSION_NUMBER >= 0x010302 */ |
| 748 | #endif /* PKCS12_FUNCS */ |
| 749 | |
| 750 | if (!pkcs12_ok) { |
| 751 | wpa_printf(MSG_DEBUG, "GnuTLS: PKCS#12 support not " |
| 752 | "included"); |
| 753 | goto fail; |
| 754 | } |
| 755 | } |
| 756 | |
| 757 | global->params_set = 1; |
| 758 | |
| 759 | return 0; |
| 760 | |
| 761 | fail: |
| 762 | gnutls_certificate_free_credentials(global->xcred); |
| 763 | return -1; |
| 764 | } |
| 765 | |
| 766 | |
| 767 | int tls_global_set_verify(void *ssl_ctx, int check_crl) |
| 768 | { |
| 769 | /* TODO */ |
| 770 | return 0; |
| 771 | } |
| 772 | |
| 773 | |
| 774 | int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn, |
| 775 | int verify_peer) |
| 776 | { |
| 777 | if (conn == NULL || conn->session == NULL) |
| 778 | return -1; |
| 779 | |
| 780 | conn->verify_peer = verify_peer; |
| 781 | gnutls_certificate_server_set_request(conn->session, |
| 782 | verify_peer ? GNUTLS_CERT_REQUIRE |
| 783 | : GNUTLS_CERT_REQUEST); |
| 784 | |
| 785 | return 0; |
| 786 | } |
| 787 | |
| 788 | |
| 789 | int tls_connection_get_keys(void *ssl_ctx, struct tls_connection *conn, |
| 790 | struct tls_keys *keys) |
| 791 | { |
| 792 | #ifdef GNUTLS_INTERNAL_STRUCTURE_HACK |
| 793 | security_parameters_st *sec; |
| 794 | #endif /* GNUTLS_INTERNAL_STRUCTURE_HACK */ |
| 795 | |
| 796 | if (conn == NULL || conn->session == NULL || keys == NULL) |
| 797 | return -1; |
| 798 | |
| 799 | os_memset(keys, 0, sizeof(*keys)); |
| 800 | |
| 801 | #ifdef GNUTLS_INTERNAL_STRUCTURE_HACK |
| 802 | sec = &conn->session->security_parameters; |
| 803 | keys->master_key = sec->master_secret; |
| 804 | keys->master_key_len = TLS_MASTER_SIZE; |
| 805 | keys->client_random = sec->client_random; |
| 806 | keys->server_random = sec->server_random; |
| 807 | #else /* GNUTLS_INTERNAL_STRUCTURE_HACK */ |
| 808 | keys->client_random = |
| 809 | (u8 *) gnutls_session_get_client_random(conn->session); |
| 810 | keys->server_random = |
| 811 | (u8 *) gnutls_session_get_server_random(conn->session); |
| 812 | /* No access to master_secret */ |
| 813 | #endif /* GNUTLS_INTERNAL_STRUCTURE_HACK */ |
| 814 | |
| 815 | #ifdef GNUTLS_IA |
| 816 | gnutls_ia_extract_inner_secret(conn->session, |
| 817 | (char *) conn->inner_secret); |
| 818 | keys->inner_secret = conn->inner_secret; |
| 819 | keys->inner_secret_len = TLS_MASTER_SIZE; |
| 820 | #endif /* GNUTLS_IA */ |
| 821 | |
| 822 | keys->client_random_len = TLS_RANDOM_SIZE; |
| 823 | keys->server_random_len = TLS_RANDOM_SIZE; |
| 824 | |
| 825 | return 0; |
| 826 | } |
| 827 | |
| 828 | |
| 829 | int tls_connection_prf(void *tls_ctx, struct tls_connection *conn, |
| 830 | const char *label, int server_random_first, |
| 831 | u8 *out, size_t out_len) |
| 832 | { |
| 833 | #if LIBGNUTLS_VERSION_NUMBER >= 0x010302 |
| 834 | if (conn == NULL || conn->session == NULL) |
| 835 | return -1; |
| 836 | |
| 837 | return gnutls_prf(conn->session, os_strlen(label), label, |
| 838 | server_random_first, 0, NULL, out_len, (char *) out); |
| 839 | #else /* LIBGNUTLS_VERSION_NUMBER >= 0x010302 */ |
| 840 | return -1; |
| 841 | #endif /* LIBGNUTLS_VERSION_NUMBER >= 0x010302 */ |
| 842 | } |
| 843 | |
| 844 | |
| 845 | static int tls_connection_verify_peer(struct tls_connection *conn) |
| 846 | { |
| 847 | unsigned int status, num_certs, i; |
| 848 | struct os_time now; |
| 849 | const gnutls_datum_t *certs; |
| 850 | gnutls_x509_crt_t cert; |
| 851 | |
| 852 | if (gnutls_certificate_verify_peers2(conn->session, &status) < 0) { |
| 853 | wpa_printf(MSG_INFO, "TLS: Failed to verify peer " |
| 854 | "certificate chain"); |
| 855 | return -1; |
| 856 | } |
| 857 | |
| 858 | if (conn->verify_peer && (status & GNUTLS_CERT_INVALID)) { |
| 859 | wpa_printf(MSG_INFO, "TLS: Peer certificate not trusted"); |
| 860 | return -1; |
| 861 | } |
| 862 | |
| 863 | if (status & GNUTLS_CERT_SIGNER_NOT_FOUND) { |
| 864 | wpa_printf(MSG_INFO, "TLS: Peer certificate does not have a " |
| 865 | "known issuer"); |
| 866 | return -1; |
| 867 | } |
| 868 | |
| 869 | if (status & GNUTLS_CERT_REVOKED) { |
| 870 | wpa_printf(MSG_INFO, "TLS: Peer certificate has been revoked"); |
| 871 | return -1; |
| 872 | } |
| 873 | |
| 874 | os_get_time(&now); |
| 875 | |
| 876 | certs = gnutls_certificate_get_peers(conn->session, &num_certs); |
| 877 | if (certs == NULL) { |
| 878 | wpa_printf(MSG_INFO, "TLS: No peer certificate chain " |
| 879 | "received"); |
| 880 | return -1; |
| 881 | } |
| 882 | |
| 883 | for (i = 0; i < num_certs; i++) { |
| 884 | char *buf; |
| 885 | size_t len; |
| 886 | if (gnutls_x509_crt_init(&cert) < 0) { |
| 887 | wpa_printf(MSG_INFO, "TLS: Certificate initialization " |
| 888 | "failed"); |
| 889 | return -1; |
| 890 | } |
| 891 | |
| 892 | if (gnutls_x509_crt_import(cert, &certs[i], |
| 893 | GNUTLS_X509_FMT_DER) < 0) { |
| 894 | wpa_printf(MSG_INFO, "TLS: Could not parse peer " |
| 895 | "certificate %d/%d", i + 1, num_certs); |
| 896 | gnutls_x509_crt_deinit(cert); |
| 897 | return -1; |
| 898 | } |
| 899 | |
| 900 | gnutls_x509_crt_get_dn(cert, NULL, &len); |
| 901 | len++; |
| 902 | buf = os_malloc(len + 1); |
| 903 | if (buf) { |
| 904 | buf[0] = buf[len] = '\0'; |
| 905 | gnutls_x509_crt_get_dn(cert, buf, &len); |
| 906 | } |
| 907 | wpa_printf(MSG_DEBUG, "TLS: Peer cert chain %d/%d: %s", |
| 908 | i + 1, num_certs, buf); |
| 909 | |
| 910 | if (i == 0) { |
| 911 | /* TODO: validate subject_match and altsubject_match */ |
| 912 | } |
| 913 | |
| 914 | os_free(buf); |
| 915 | |
| 916 | if (gnutls_x509_crt_get_expiration_time(cert) < now.sec || |
| 917 | gnutls_x509_crt_get_activation_time(cert) > now.sec) { |
| 918 | wpa_printf(MSG_INFO, "TLS: Peer certificate %d/%d is " |
| 919 | "not valid at this time", |
| 920 | i + 1, num_certs); |
| 921 | gnutls_x509_crt_deinit(cert); |
| 922 | return -1; |
| 923 | } |
| 924 | |
| 925 | gnutls_x509_crt_deinit(cert); |
| 926 | } |
| 927 | |
| 928 | return 0; |
| 929 | } |
| 930 | |
| 931 | |
| 932 | u8 * tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn, |
| 933 | const u8 *in_data, size_t in_len, |
| 934 | size_t *out_len, u8 **appl_data, |
| 935 | size_t *appl_data_len) |
| 936 | { |
| 937 | struct tls_global *global = ssl_ctx; |
| 938 | u8 *out_data; |
| 939 | int ret; |
| 940 | |
| 941 | if (appl_data) |
| 942 | *appl_data = NULL; |
| 943 | |
| 944 | if (in_data && in_len) { |
| 945 | if (conn->pull_buf) { |
| 946 | wpa_printf(MSG_DEBUG, "%s - %d bytes remaining in " |
| 947 | "pull_buf", __func__, conn->pull_buf_len); |
| 948 | os_free(conn->pull_buf); |
| 949 | } |
| 950 | conn->pull_buf = os_malloc(in_len); |
| 951 | if (conn->pull_buf == NULL) |
| 952 | return NULL; |
| 953 | os_memcpy(conn->pull_buf, in_data, in_len); |
| 954 | conn->pull_buf_offset = conn->pull_buf; |
| 955 | conn->pull_buf_len = in_len; |
| 956 | } |
| 957 | |
| 958 | ret = gnutls_handshake(conn->session); |
| 959 | if (ret < 0) { |
| 960 | switch (ret) { |
| 961 | case GNUTLS_E_AGAIN: |
| 962 | if (global->server && conn->established && |
| 963 | conn->push_buf == NULL) { |
| 964 | /* Need to return something to trigger |
| 965 | * completion of EAP-TLS. */ |
| 966 | conn->push_buf = os_malloc(1); |
| 967 | } |
| 968 | break; |
| 969 | case GNUTLS_E_FATAL_ALERT_RECEIVED: |
| 970 | wpa_printf(MSG_DEBUG, "%s - received fatal '%s' alert", |
| 971 | __func__, gnutls_alert_get_name( |
| 972 | gnutls_alert_get(conn->session))); |
| 973 | conn->read_alerts++; |
| 974 | /* continue */ |
| 975 | default: |
| 976 | wpa_printf(MSG_DEBUG, "%s - gnutls_handshake failed " |
| 977 | "-> %s", __func__, gnutls_strerror(ret)); |
| 978 | conn->failed++; |
| 979 | } |
| 980 | } else { |
| 981 | size_t size; |
| 982 | |
| 983 | if (conn->verify_peer && tls_connection_verify_peer(conn)) { |
| 984 | wpa_printf(MSG_INFO, "TLS: Peer certificate chain " |
| 985 | "failed validation"); |
| 986 | conn->failed++; |
| 987 | return NULL; |
| 988 | } |
| 989 | |
| 990 | if (conn->tls_ia && !gnutls_ia_handshake_p(conn->session)) { |
| 991 | wpa_printf(MSG_INFO, "TLS: No TLS/IA negotiation"); |
| 992 | conn->failed++; |
| 993 | return NULL; |
| 994 | } |
| 995 | |
| 996 | if (conn->tls_ia) |
| 997 | wpa_printf(MSG_DEBUG, "TLS: Start TLS/IA handshake"); |
| 998 | else { |
| 999 | wpa_printf(MSG_DEBUG, "TLS: Handshake completed " |
| 1000 | "successfully"); |
| 1001 | } |
| 1002 | conn->established = 1; |
| 1003 | if (conn->push_buf == NULL) { |
| 1004 | /* Need to return something to get final TLS ACK. */ |
| 1005 | conn->push_buf = os_malloc(1); |
| 1006 | } |
| 1007 | |
| 1008 | gnutls_session_get_data(conn->session, NULL, &size); |
| 1009 | if (global->session_data == NULL || |
| 1010 | global->session_data_size < size) { |
| 1011 | os_free(global->session_data); |
| 1012 | global->session_data = os_malloc(size); |
| 1013 | } |
| 1014 | if (global->session_data) { |
| 1015 | global->session_data_size = size; |
| 1016 | gnutls_session_get_data(conn->session, |
| 1017 | global->session_data, |
| 1018 | &global->session_data_size); |
| 1019 | } |
| 1020 | } |
| 1021 | |
| 1022 | out_data = conn->push_buf; |
| 1023 | *out_len = conn->push_buf_len; |
| 1024 | conn->push_buf = NULL; |
| 1025 | conn->push_buf_len = 0; |
| 1026 | return out_data; |
| 1027 | } |
| 1028 | |
| 1029 | |
| 1030 | u8 * tls_connection_server_handshake(void *ssl_ctx, |
| 1031 | struct tls_connection *conn, |
| 1032 | const u8 *in_data, size_t in_len, |
| 1033 | size_t *out_len) |
| 1034 | { |
| 1035 | return tls_connection_handshake(ssl_ctx, conn, in_data, in_len, |
| 1036 | out_len, NULL, NULL); |
| 1037 | } |
| 1038 | |
| 1039 | |
| 1040 | int tls_connection_encrypt(void *ssl_ctx, struct tls_connection *conn, |
| 1041 | const u8 *in_data, size_t in_len, |
| 1042 | u8 *out_data, size_t out_len) |
| 1043 | { |
| 1044 | ssize_t res; |
| 1045 | |
| 1046 | #ifdef GNUTLS_IA |
| 1047 | if (conn->tls_ia) |
| 1048 | res = gnutls_ia_send(conn->session, (char *) in_data, in_len); |
| 1049 | else |
| 1050 | #endif /* GNUTLS_IA */ |
| 1051 | res = gnutls_record_send(conn->session, in_data, in_len); |
| 1052 | if (res < 0) { |
| 1053 | wpa_printf(MSG_INFO, "%s: Encryption failed: %s", |
| 1054 | __func__, gnutls_strerror(res)); |
| 1055 | return -1; |
| 1056 | } |
| 1057 | if (conn->push_buf == NULL) |
| 1058 | return -1; |
| 1059 | if (conn->push_buf_len < out_len) |
| 1060 | out_len = conn->push_buf_len; |
| 1061 | os_memcpy(out_data, conn->push_buf, out_len); |
| 1062 | os_free(conn->push_buf); |
| 1063 | conn->push_buf = NULL; |
| 1064 | conn->push_buf_len = 0; |
| 1065 | return out_len; |
| 1066 | } |
| 1067 | |
| 1068 | |
| 1069 | int tls_connection_decrypt(void *ssl_ctx, struct tls_connection *conn, |
| 1070 | const u8 *in_data, size_t in_len, |
| 1071 | u8 *out_data, size_t out_len) |
| 1072 | { |
| 1073 | ssize_t res; |
| 1074 | |
| 1075 | if (conn->pull_buf) { |
| 1076 | wpa_printf(MSG_DEBUG, "%s - %d bytes remaining in " |
| 1077 | "pull_buf", __func__, conn->pull_buf_len); |
| 1078 | os_free(conn->pull_buf); |
| 1079 | } |
| 1080 | conn->pull_buf = os_malloc(in_len); |
| 1081 | if (conn->pull_buf == NULL) |
| 1082 | return -1; |
| 1083 | os_memcpy(conn->pull_buf, in_data, in_len); |
| 1084 | conn->pull_buf_offset = conn->pull_buf; |
| 1085 | conn->pull_buf_len = in_len; |
| 1086 | |
| 1087 | #ifdef GNUTLS_IA |
| 1088 | if (conn->tls_ia) { |
| 1089 | res = gnutls_ia_recv(conn->session, (char *) out_data, |
| 1090 | out_len); |
| 1091 | if (out_len >= 12 && |
| 1092 | (res == GNUTLS_E_WARNING_IA_IPHF_RECEIVED || |
| 1093 | res == GNUTLS_E_WARNING_IA_FPHF_RECEIVED)) { |
| 1094 | int final = res == GNUTLS_E_WARNING_IA_FPHF_RECEIVED; |
| 1095 | wpa_printf(MSG_DEBUG, "%s: Received %sPhaseFinished", |
| 1096 | __func__, final ? "Final" : "Intermediate"); |
| 1097 | |
| 1098 | res = gnutls_ia_permute_inner_secret( |
| 1099 | conn->session, conn->session_keys_len, |
| 1100 | (char *) conn->session_keys); |
| 1101 | if (conn->session_keys) { |
| 1102 | os_memset(conn->session_keys, 0, |
| 1103 | conn->session_keys_len); |
| 1104 | os_free(conn->session_keys); |
| 1105 | } |
| 1106 | conn->session_keys = NULL; |
| 1107 | conn->session_keys_len = 0; |
| 1108 | if (res) { |
| 1109 | wpa_printf(MSG_DEBUG, "%s: Failed to permute " |
| 1110 | "inner secret: %s", |
| 1111 | __func__, gnutls_strerror(res)); |
| 1112 | return -1; |
| 1113 | } |
| 1114 | |
| 1115 | res = gnutls_ia_verify_endphase(conn->session, |
| 1116 | (char *) out_data); |
| 1117 | if (res == 0) { |
| 1118 | wpa_printf(MSG_DEBUG, "%s: Correct endphase " |
| 1119 | "checksum", __func__); |
| 1120 | } else { |
| 1121 | wpa_printf(MSG_INFO, "%s: Endphase " |
| 1122 | "verification failed: %s", |
| 1123 | __func__, gnutls_strerror(res)); |
| 1124 | return -1; |
| 1125 | } |
| 1126 | |
| 1127 | if (final) |
| 1128 | conn->final_phase_finished = 1; |
| 1129 | |
| 1130 | return 0; |
| 1131 | } |
| 1132 | |
| 1133 | if (res < 0) { |
| 1134 | wpa_printf(MSG_DEBUG, "%s - gnutls_ia_recv failed: %d " |
| 1135 | "(%s)", __func__, res, |
| 1136 | gnutls_strerror(res)); |
| 1137 | } |
| 1138 | return res; |
| 1139 | } |
| 1140 | #endif /* GNUTLS_IA */ |
| 1141 | |
| 1142 | res = gnutls_record_recv(conn->session, out_data, out_len); |
| 1143 | if (res < 0) { |
| 1144 | wpa_printf(MSG_DEBUG, "%s - gnutls_record_recv failed: %d " |
| 1145 | "(%s)", __func__, res, gnutls_strerror(res)); |
| 1146 | } |
| 1147 | |
| 1148 | return res; |
| 1149 | } |
| 1150 | |
| 1151 | |
| 1152 | int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn) |
| 1153 | { |
| 1154 | if (conn == NULL) |
| 1155 | return 0; |
| 1156 | return gnutls_session_is_resumed(conn->session); |
| 1157 | } |
| 1158 | |
| 1159 | |
| 1160 | int tls_connection_set_master_key(void *ssl_ctx, struct tls_connection *conn, |
| 1161 | const u8 *key, size_t key_len) |
| 1162 | { |
| 1163 | /* TODO */ |
| 1164 | return -1; |
| 1165 | } |
| 1166 | |
| 1167 | |
| 1168 | int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn, |
| 1169 | u8 *ciphers) |
| 1170 | { |
| 1171 | /* TODO */ |
| 1172 | return -1; |
| 1173 | } |
| 1174 | |
| 1175 | |
| 1176 | int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn, |
| 1177 | char *buf, size_t buflen) |
| 1178 | { |
| 1179 | /* TODO */ |
| 1180 | buf[0] = '\0'; |
| 1181 | return 0; |
| 1182 | } |
| 1183 | |
| 1184 | |
| 1185 | int tls_connection_enable_workaround(void *ssl_ctx, |
| 1186 | struct tls_connection *conn) |
| 1187 | { |
| 1188 | /* TODO: set SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS */ |
| 1189 | return 0; |
| 1190 | } |
| 1191 | |
| 1192 | |
| 1193 | int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn, |
| 1194 | int ext_type, const u8 *data, |
| 1195 | size_t data_len) |
| 1196 | { |
| 1197 | /* TODO */ |
| 1198 | return -1; |
| 1199 | } |
| 1200 | |
| 1201 | |
| 1202 | int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn) |
| 1203 | { |
| 1204 | if (conn == NULL) |
| 1205 | return -1; |
| 1206 | return conn->failed; |
| 1207 | } |
| 1208 | |
| 1209 | |
| 1210 | int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn) |
| 1211 | { |
| 1212 | if (conn == NULL) |
| 1213 | return -1; |
| 1214 | return conn->read_alerts; |
| 1215 | } |
| 1216 | |
| 1217 | |
| 1218 | int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn) |
| 1219 | { |
| 1220 | if (conn == NULL) |
| 1221 | return -1; |
| 1222 | return conn->write_alerts; |
| 1223 | } |
| 1224 | |
| 1225 | |
| 1226 | int tls_connection_get_keyblock_size(void *tls_ctx, |
| 1227 | struct tls_connection *conn) |
| 1228 | { |
| 1229 | /* TODO */ |
| 1230 | return -1; |
| 1231 | } |
| 1232 | |
| 1233 | |
| 1234 | unsigned int tls_capabilities(void *tls_ctx) |
| 1235 | { |
| 1236 | unsigned int capa = 0; |
| 1237 | |
| 1238 | #ifdef GNUTLS_IA |
| 1239 | capa |= TLS_CAPABILITY_IA; |
| 1240 | #endif /* GNUTLS_IA */ |
| 1241 | |
| 1242 | return capa; |
| 1243 | } |
| 1244 | |
| 1245 | |
| 1246 | int tls_connection_set_ia(void *tls_ctx, struct tls_connection *conn, |
| 1247 | int tls_ia) |
| 1248 | { |
| 1249 | #ifdef GNUTLS_IA |
| 1250 | int ret; |
| 1251 | |
| 1252 | if (conn == NULL) |
| 1253 | return -1; |
| 1254 | |
| 1255 | conn->tls_ia = tls_ia; |
| 1256 | if (!tls_ia) |
| 1257 | return 0; |
| 1258 | |
| 1259 | ret = gnutls_ia_allocate_server_credentials(&conn->iacred_srv); |
| 1260 | if (ret) { |
| 1261 | wpa_printf(MSG_DEBUG, "Failed to allocate IA credentials: %s", |
| 1262 | gnutls_strerror(ret)); |
| 1263 | return -1; |
| 1264 | } |
| 1265 | |
| 1266 | ret = gnutls_credentials_set(conn->session, GNUTLS_CRD_IA, |
| 1267 | conn->iacred_srv); |
| 1268 | if (ret) { |
| 1269 | wpa_printf(MSG_DEBUG, "Failed to configure IA credentials: %s", |
| 1270 | gnutls_strerror(ret)); |
| 1271 | gnutls_ia_free_server_credentials(conn->iacred_srv); |
| 1272 | conn->iacred_srv = NULL; |
| 1273 | return -1; |
| 1274 | } |
| 1275 | |
| 1276 | return 0; |
| 1277 | #else /* GNUTLS_IA */ |
| 1278 | return -1; |
| 1279 | #endif /* GNUTLS_IA */ |
| 1280 | } |
| 1281 | |
| 1282 | |
| 1283 | int tls_connection_ia_send_phase_finished(void *tls_ctx, |
| 1284 | struct tls_connection *conn, |
| 1285 | int final, |
| 1286 | u8 *out_data, size_t out_len) |
| 1287 | { |
| 1288 | #ifdef GNUTLS_IA |
| 1289 | int ret; |
| 1290 | |
| 1291 | if (conn == NULL || conn->session == NULL || !conn->tls_ia) |
| 1292 | return -1; |
| 1293 | |
| 1294 | ret = gnutls_ia_permute_inner_secret(conn->session, |
| 1295 | conn->session_keys_len, |
| 1296 | (char *) conn->session_keys); |
| 1297 | if (conn->session_keys) { |
| 1298 | os_memset(conn->session_keys, 0, conn->session_keys_len); |
| 1299 | os_free(conn->session_keys); |
| 1300 | } |
| 1301 | conn->session_keys = NULL; |
| 1302 | conn->session_keys_len = 0; |
| 1303 | if (ret) { |
| 1304 | wpa_printf(MSG_DEBUG, "%s: Failed to permute inner secret: %s", |
| 1305 | __func__, gnutls_strerror(ret)); |
| 1306 | return -1; |
| 1307 | } |
| 1308 | |
| 1309 | ret = gnutls_ia_endphase_send(conn->session, final); |
| 1310 | if (ret) { |
| 1311 | wpa_printf(MSG_DEBUG, "%s: Failed to send endphase: %s", |
| 1312 | __func__, gnutls_strerror(ret)); |
| 1313 | return -1; |
| 1314 | } |
| 1315 | |
| 1316 | if (conn->push_buf == NULL) |
| 1317 | return -1; |
| 1318 | if (conn->push_buf_len < out_len) |
| 1319 | out_len = conn->push_buf_len; |
| 1320 | os_memcpy(out_data, conn->push_buf, out_len); |
| 1321 | os_free(conn->push_buf); |
| 1322 | conn->push_buf = NULL; |
| 1323 | conn->push_buf_len = 0; |
| 1324 | return out_len; |
| 1325 | #else /* GNUTLS_IA */ |
| 1326 | return -1; |
| 1327 | #endif /* GNUTLS_IA */ |
| 1328 | } |
| 1329 | |
| 1330 | |
| 1331 | int tls_connection_ia_final_phase_finished(void *tls_ctx, |
| 1332 | struct tls_connection *conn) |
| 1333 | { |
| 1334 | if (conn == NULL) |
| 1335 | return -1; |
| 1336 | |
| 1337 | return conn->final_phase_finished; |
| 1338 | } |
| 1339 | |
| 1340 | |
| 1341 | int tls_connection_ia_permute_inner_secret(void *tls_ctx, |
| 1342 | struct tls_connection *conn, |
| 1343 | const u8 *key, size_t key_len) |
| 1344 | { |
| 1345 | #ifdef GNUTLS_IA |
| 1346 | if (conn == NULL || !conn->tls_ia) |
| 1347 | return -1; |
| 1348 | |
| 1349 | if (conn->session_keys) { |
| 1350 | os_memset(conn->session_keys, 0, conn->session_keys_len); |
| 1351 | os_free(conn->session_keys); |
| 1352 | } |
| 1353 | conn->session_keys_len = 0; |
| 1354 | |
| 1355 | if (key) { |
| 1356 | conn->session_keys = os_malloc(key_len); |
| 1357 | if (conn->session_keys == NULL) |
| 1358 | return -1; |
| 1359 | os_memcpy(conn->session_keys, key, key_len); |
| 1360 | conn->session_keys_len = key_len; |
| 1361 | } else { |
| 1362 | conn->session_keys = NULL; |
| 1363 | conn->session_keys_len = 0; |
| 1364 | } |
| 1365 | |
| 1366 | return 0; |
| 1367 | #else /* GNUTLS_IA */ |
| 1368 | return -1; |
| 1369 | #endif /* GNUTLS_IA */ |
| 1370 | } |