2 * WPA Supplicant / SSL/TLS interface functions for openssl
3 * Copyright (c) 2004-2007, Jouni Malinen <j@w1.fi>
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.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
16 #include <gnutls/gnutls.h>
17 #include <gnutls/x509.h>
19 #include <gnutls/pkcs12.h>
20 #endif /* PKCS12_FUNCS */
22 #ifdef CONFIG_GNUTLS_EXTRA
23 #if LIBGNUTLS_VERSION_NUMBER >= 0x010302
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 */
38 #define TLS_RANDOM_SIZE 32
39 #define TLS_MASTER_SIZE 48
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.
47 #define GNUTLS_INTERNAL_STRUCTURE_HACK
48 #endif /* LIBGNUTLS_VERSION_NUMBER < 0x010302 */
51 #ifdef GNUTLS_INTERNAL_STRUCTURE_HACK
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.
61 typedef unsigned char opaque;
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;
82 struct gnutls_session_int {
83 security_parameters_st security_parameters;
84 /* followed by things we are not interested in */
86 #endif /* LIBGNUTLS_VERSION_NUMBER < 0x010302 */
88 static int tls_gnutls_ref_count = 0;
91 /* Data for session resumption */
93 size_t session_data_size;
98 gnutls_certificate_credentials_t xcred;
101 struct tls_connection {
102 gnutls_session session;
103 char *subject_match, *altsubject_match;
104 int read_alerts, write_alerts, failed;
106 u8 *pre_shared_secret;
107 size_t pre_shared_secret_len;
111 u8 *push_buf, *pull_buf, *pull_buf_offset;
112 size_t push_buf_len, pull_buf_len;
115 gnutls_certificate_credentials_t xcred;
118 int final_phase_finished;
121 gnutls_ia_server_credentials_t iacred_srv;
122 gnutls_ia_client_credentials_t iacred_cli;
124 /* Session keys generated in the current phase for inner secret
125 * permutation before generating/verifying PhaseFinished. */
127 size_t session_keys_len;
129 u8 inner_secret[TLS_MASTER_SIZE];
130 #endif /* GNUTLS_IA */
134 static void tls_log_func(int level, const char *msg)
137 if (level == 6 || level == 7) {
138 /* These levels seem to be mostly I/O debug and msg dumps */
147 while (*pos != '\0') {
154 wpa_printf(level > 3 ? MSG_MSGDUMP : MSG_DEBUG,
155 "gnutls<%d> %s", level, s);
160 extern int wpa_debug_show_keys;
162 void * tls_init(const struct tls_config *conf)
164 struct tls_global *global;
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
172 const char *ok_ver[] = { "1.2.3", "1.2.4", "1.2.5", "1.2.6", "1.2.9",
176 #endif /* GNUTLS_INTERNAL_STRUCTURE_HACK */
178 global = os_zalloc(sizeof(*global));
182 if (tls_gnutls_ref_count == 0 && gnutls_global_init() < 0) {
186 tls_gnutls_ref_count++;
188 #ifdef GNUTLS_INTERNAL_STRUCTURE_HACK
189 ver = gnutls_check_version(NULL);
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)
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);
205 #endif /* GNUTLS_INTERNAL_STRUCTURE_HACK */
207 gnutls_global_set_log_function(tls_log_func);
208 if (wpa_debug_show_keys)
209 gnutls_global_set_log_level(11);
214 void tls_deinit(void *ssl_ctx)
216 struct tls_global *global = ssl_ctx;
218 if (global->params_set)
219 gnutls_certificate_free_credentials(global->xcred);
220 os_free(global->session_data);
224 tls_gnutls_ref_count--;
225 if (tls_gnutls_ref_count == 0)
226 gnutls_global_deinit();
230 int tls_get_errors(void *ssl_ctx)
236 static ssize_t tls_pull_func(gnutls_transport_ptr ptr, void *buf,
239 struct tls_connection *conn = (struct tls_connection *) ptr;
241 if (conn->pull_buf == NULL) {
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;
257 wpa_printf(MSG_DEBUG, "%s - %d bytes remaining in pull_buf",
258 __func__, end - conn->pull_buf_offset);
264 static ssize_t tls_push_func(gnutls_transport_ptr ptr, const void *buf,
267 struct tls_connection *conn = (struct tls_connection *) ptr;
270 nbuf = os_realloc(conn->push_buf, conn->push_buf_len + len);
275 os_memcpy(nbuf + conn->push_buf_len, buf, len);
276 conn->push_buf = nbuf;
277 conn->push_buf_len += len;
283 static int tls_gnutls_init_session(struct tls_global *global,
284 struct tls_connection *conn)
286 const int cert_types[2] = { GNUTLS_CRT_X509, 0 };
287 const int protos[2] = { GNUTLS_TLS1, 0 };
290 ret = gnutls_init(&conn->session,
291 global->server ? GNUTLS_SERVER : GNUTLS_CLIENT);
293 wpa_printf(MSG_INFO, "TLS: Failed to initialize new TLS "
294 "connection: %s", gnutls_strerror(ret));
298 ret = gnutls_set_default_priority(conn->session);
302 ret = gnutls_certificate_type_set_priority(conn->session, cert_types);
306 ret = gnutls_protocol_set_priority(conn->session, protos);
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);
317 wpa_printf(MSG_INFO, "TLS: Failed to setup new TLS connection: %s",
318 gnutls_strerror(ret));
319 gnutls_deinit(conn->session);
324 struct tls_connection * tls_connection_init(void *ssl_ctx)
326 struct tls_global *global = ssl_ctx;
327 struct tls_connection *conn;
330 conn = os_zalloc(sizeof(*conn));
334 if (tls_gnutls_init_session(global, conn)) {
339 if (global->params_set) {
340 ret = gnutls_credentials_set(conn->session,
341 GNUTLS_CRD_CERTIFICATE,
344 wpa_printf(MSG_INFO, "Failed to configure "
345 "credentials: %s", gnutls_strerror(ret));
351 if (gnutls_certificate_allocate_credentials(&conn->xcred)) {
360 void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn)
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);
374 #endif /* GNUTLS_IA */
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);
387 int tls_connection_established(void *ssl_ctx, struct tls_connection *conn)
389 return conn ? conn->established : 0;
393 int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn)
395 struct tls_global *global = ssl_ctx;
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;
411 if (conn->session_keys) {
412 os_memset(conn->session_keys, 0, conn->session_keys_len);
413 os_free(conn->session_keys);
415 conn->session_keys_len = 0;
416 #endif /* GNUTLS_IA */
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");
425 ret = gnutls_credentials_set(conn->session, GNUTLS_CRD_CERTIFICATE,
426 conn->params_set ? conn->xcred :
429 wpa_printf(MSG_INFO, "GnuTLS: Failed to configure credentials "
430 "for session resumption: %s", gnutls_strerror(ret));
434 if (global->session_data) {
435 ret = gnutls_session_set_data(conn->session,
436 global->session_data,
437 global->session_data_size);
439 wpa_printf(MSG_INFO, "GnuTLS: Failed to set session "
440 "data: %s", gnutls_strerror(ret));
450 static int tls_match_altsubject(X509 *cert, const char *match)
458 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
460 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
461 gen = sk_GENERAL_NAME_value(ext, i);
474 wpa_printf(MSG_DEBUG, "TLS: altSubjectName: "
475 "unsupported type=%d", gen->type);
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);
489 snprintf(tmp, len, "%s:%s", field, gen->d.ia5->data);
490 if (strstr(tmp, match))
501 static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
507 struct tls_connection *conn;
508 char *match, *altmatch;
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));
517 conn = SSL_get_app_data(ssl);
518 match = conn ? conn->subject_match : NULL;
519 altmatch = conn ? conn->altsubject_match : NULL;
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);
526 wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - "
527 "preverify_ok=%d err=%d (%s) depth=%d buf='%s'",
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);
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);
547 int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
548 const struct tls_connection_params *params)
552 if (conn == NULL || params == NULL)
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)
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)
571 /* TODO: gnutls_certificate_set_verify_flags(xcred, flags);
572 * to force peer validation(?) */
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);
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);
586 wpa_printf(MSG_DEBUG, "Failed to read CA cert "
587 "'%s' in DER format: %s",
589 gnutls_strerror(ret));
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);
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);
607 wpa_printf(MSG_DEBUG, "Failed to read client "
608 "cert/key in DER format: %s",
609 gnutls_strerror(ret));
613 } else if (params->private_key) {
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);
622 wpa_printf(MSG_DEBUG, "Failed to load private_key in "
623 "PKCS#12 format: %s", gnutls_strerror(ret));
627 #endif /* LIBGNUTLS_VERSION_NUMBER >= 0x010302 */
628 #endif /* PKCS12_FUNCS */
631 wpa_printf(MSG_DEBUG, "GnuTLS: PKCS#12 support not "
637 conn->tls_ia = params->tls_ia;
638 conn->params_set = 1;
640 ret = gnutls_credentials_set(conn->session, GNUTLS_CRD_CERTIFICATE,
643 wpa_printf(MSG_INFO, "Failed to configure credentials: %s",
644 gnutls_strerror(ret));
648 if (conn->iacred_cli)
649 gnutls_ia_free_client_credentials(conn->iacred_cli);
651 ret = gnutls_ia_allocate_client_credentials(&conn->iacred_cli);
653 wpa_printf(MSG_DEBUG, "Failed to allocate IA credentials: %s",
654 gnutls_strerror(ret));
658 ret = gnutls_credentials_set(conn->session, GNUTLS_CRD_IA,
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;
667 #endif /* GNUTLS_IE */
673 int tls_global_set_params(void *tls_ctx,
674 const struct tls_connection_params *params)
676 struct tls_global *global = tls_ctx;
679 /* Currently, global parameters are only set when running in server
683 if (global->params_set) {
684 gnutls_certificate_free_credentials(global->xcred);
685 global->params_set = 0;
688 ret = gnutls_certificate_allocate_credentials(&global->xcred);
690 wpa_printf(MSG_DEBUG, "Failed to allocate global credentials "
691 "%s", gnutls_strerror(ret));
695 if (params->ca_cert) {
696 ret = gnutls_certificate_set_x509_trust_file(
697 global->xcred, params->ca_cert, GNUTLS_X509_FMT_PEM);
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);
706 wpa_printf(MSG_DEBUG, "Failed to read CA cert "
707 "'%s' in DER format: %s",
709 gnutls_strerror(ret));
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);
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);
727 wpa_printf(MSG_DEBUG, "Failed to read client "
728 "cert/key in DER format: %s",
729 gnutls_strerror(ret));
733 } else if (params->private_key) {
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);
742 wpa_printf(MSG_DEBUG, "Failed to load private_key in "
743 "PKCS#12 format: %s", gnutls_strerror(ret));
747 #endif /* LIBGNUTLS_VERSION_NUMBER >= 0x010302 */
748 #endif /* PKCS12_FUNCS */
751 wpa_printf(MSG_DEBUG, "GnuTLS: PKCS#12 support not "
757 global->params_set = 1;
762 gnutls_certificate_free_credentials(global->xcred);
767 int tls_global_set_verify(void *ssl_ctx, int check_crl)
774 int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn,
777 if (conn == NULL || conn->session == NULL)
780 conn->verify_peer = verify_peer;
781 gnutls_certificate_server_set_request(conn->session,
782 verify_peer ? GNUTLS_CERT_REQUIRE
783 : GNUTLS_CERT_REQUEST);
789 int tls_connection_get_keys(void *ssl_ctx, struct tls_connection *conn,
790 struct tls_keys *keys)
792 #ifdef GNUTLS_INTERNAL_STRUCTURE_HACK
793 security_parameters_st *sec;
794 #endif /* GNUTLS_INTERNAL_STRUCTURE_HACK */
796 if (conn == NULL || conn->session == NULL || keys == NULL)
799 os_memset(keys, 0, sizeof(*keys));
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 */
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 */
822 keys->client_random_len = TLS_RANDOM_SIZE;
823 keys->server_random_len = TLS_RANDOM_SIZE;
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)
833 #if LIBGNUTLS_VERSION_NUMBER >= 0x010302
834 if (conn == NULL || conn->session == NULL)
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 */
841 #endif /* LIBGNUTLS_VERSION_NUMBER >= 0x010302 */
845 static int tls_connection_verify_peer(struct tls_connection *conn)
847 unsigned int status, num_certs, i;
849 const gnutls_datum_t *certs;
850 gnutls_x509_crt_t cert;
852 if (gnutls_certificate_verify_peers2(conn->session, &status) < 0) {
853 wpa_printf(MSG_INFO, "TLS: Failed to verify peer "
854 "certificate chain");
858 if (conn->verify_peer && (status & GNUTLS_CERT_INVALID)) {
859 wpa_printf(MSG_INFO, "TLS: Peer certificate not trusted");
863 if (status & GNUTLS_CERT_SIGNER_NOT_FOUND) {
864 wpa_printf(MSG_INFO, "TLS: Peer certificate does not have a "
869 if (status & GNUTLS_CERT_REVOKED) {
870 wpa_printf(MSG_INFO, "TLS: Peer certificate has been revoked");
876 certs = gnutls_certificate_get_peers(conn->session, &num_certs);
878 wpa_printf(MSG_INFO, "TLS: No peer certificate chain "
883 for (i = 0; i < num_certs; i++) {
886 if (gnutls_x509_crt_init(&cert) < 0) {
887 wpa_printf(MSG_INFO, "TLS: Certificate initialization "
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);
900 gnutls_x509_crt_get_dn(cert, NULL, &len);
902 buf = os_malloc(len + 1);
904 buf[0] = buf[len] = '\0';
905 gnutls_x509_crt_get_dn(cert, buf, &len);
907 wpa_printf(MSG_DEBUG, "TLS: Peer cert chain %d/%d: %s",
908 i + 1, num_certs, buf);
911 /* TODO: validate subject_match and altsubject_match */
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",
921 gnutls_x509_crt_deinit(cert);
925 gnutls_x509_crt_deinit(cert);
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)
937 struct tls_global *global = ssl_ctx;
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);
950 conn->pull_buf = os_malloc(in_len);
951 if (conn->pull_buf == 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;
958 ret = gnutls_handshake(conn->session);
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);
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)));
976 wpa_printf(MSG_DEBUG, "%s - gnutls_handshake failed "
977 "-> %s", __func__, gnutls_strerror(ret));
983 if (conn->verify_peer && tls_connection_verify_peer(conn)) {
984 wpa_printf(MSG_INFO, "TLS: Peer certificate chain "
985 "failed validation");
990 if (conn->tls_ia && !gnutls_ia_handshake_p(conn->session)) {
991 wpa_printf(MSG_INFO, "TLS: No TLS/IA negotiation");
997 wpa_printf(MSG_DEBUG, "TLS: Start TLS/IA handshake");
999 wpa_printf(MSG_DEBUG, "TLS: Handshake completed "
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);
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);
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);
1022 out_data = conn->push_buf;
1023 *out_len = conn->push_buf_len;
1024 conn->push_buf = NULL;
1025 conn->push_buf_len = 0;
1030 u8 * tls_connection_server_handshake(void *ssl_ctx,
1031 struct tls_connection *conn,
1032 const u8 *in_data, size_t in_len,
1035 return tls_connection_handshake(ssl_ctx, conn, in_data, in_len,
1036 out_len, NULL, NULL);
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)
1048 res = gnutls_ia_send(conn->session, (char *) in_data, in_len);
1050 #endif /* GNUTLS_IA */
1051 res = gnutls_record_send(conn->session, in_data, in_len);
1053 wpa_printf(MSG_INFO, "%s: Encryption failed: %s",
1054 __func__, gnutls_strerror(res));
1057 if (conn->push_buf == NULL)
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;
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)
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);
1080 conn->pull_buf = os_malloc(in_len);
1081 if (conn->pull_buf == NULL)
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;
1089 res = gnutls_ia_recv(conn->session, (char *) out_data,
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");
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);
1106 conn->session_keys = NULL;
1107 conn->session_keys_len = 0;
1109 wpa_printf(MSG_DEBUG, "%s: Failed to permute "
1111 __func__, gnutls_strerror(res));
1115 res = gnutls_ia_verify_endphase(conn->session,
1118 wpa_printf(MSG_DEBUG, "%s: Correct endphase "
1119 "checksum", __func__);
1121 wpa_printf(MSG_INFO, "%s: Endphase "
1122 "verification failed: %s",
1123 __func__, gnutls_strerror(res));
1128 conn->final_phase_finished = 1;
1134 wpa_printf(MSG_DEBUG, "%s - gnutls_ia_recv failed: %d "
1135 "(%s)", __func__, res,
1136 gnutls_strerror(res));
1140 #endif /* GNUTLS_IA */
1142 res = gnutls_record_recv(conn->session, out_data, out_len);
1144 wpa_printf(MSG_DEBUG, "%s - gnutls_record_recv failed: %d "
1145 "(%s)", __func__, res, gnutls_strerror(res));
1152 int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn)
1156 return gnutls_session_is_resumed(conn->session);
1160 int tls_connection_set_master_key(void *ssl_ctx, struct tls_connection *conn,
1161 const u8 *key, size_t key_len)
1168 int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
1176 int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn,
1177 char *buf, size_t buflen)
1185 int tls_connection_enable_workaround(void *ssl_ctx,
1186 struct tls_connection *conn)
1188 /* TODO: set SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS */
1193 int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn,
1194 int ext_type, const u8 *data,
1202 int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn)
1206 return conn->failed;
1210 int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn)
1214 return conn->read_alerts;
1218 int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn)
1222 return conn->write_alerts;
1226 int tls_connection_get_keyblock_size(void *tls_ctx,
1227 struct tls_connection *conn)
1234 unsigned int tls_capabilities(void *tls_ctx)
1236 unsigned int capa = 0;
1239 capa |= TLS_CAPABILITY_IA;
1240 #endif /* GNUTLS_IA */
1246 int tls_connection_set_ia(void *tls_ctx, struct tls_connection *conn,
1255 conn->tls_ia = tls_ia;
1259 ret = gnutls_ia_allocate_server_credentials(&conn->iacred_srv);
1261 wpa_printf(MSG_DEBUG, "Failed to allocate IA credentials: %s",
1262 gnutls_strerror(ret));
1266 ret = gnutls_credentials_set(conn->session, GNUTLS_CRD_IA,
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;
1277 #else /* GNUTLS_IA */
1279 #endif /* GNUTLS_IA */
1283 int tls_connection_ia_send_phase_finished(void *tls_ctx,
1284 struct tls_connection *conn,
1286 u8 *out_data, size_t out_len)
1291 if (conn == NULL || conn->session == NULL || !conn->tls_ia)
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);
1301 conn->session_keys = NULL;
1302 conn->session_keys_len = 0;
1304 wpa_printf(MSG_DEBUG, "%s: Failed to permute inner secret: %s",
1305 __func__, gnutls_strerror(ret));
1309 ret = gnutls_ia_endphase_send(conn->session, final);
1311 wpa_printf(MSG_DEBUG, "%s: Failed to send endphase: %s",
1312 __func__, gnutls_strerror(ret));
1316 if (conn->push_buf == NULL)
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;
1325 #else /* GNUTLS_IA */
1327 #endif /* GNUTLS_IA */
1331 int tls_connection_ia_final_phase_finished(void *tls_ctx,
1332 struct tls_connection *conn)
1337 return conn->final_phase_finished;
1341 int tls_connection_ia_permute_inner_secret(void *tls_ctx,
1342 struct tls_connection *conn,
1343 const u8 *key, size_t key_len)
1346 if (conn == NULL || !conn->tls_ia)
1349 if (conn->session_keys) {
1350 os_memset(conn->session_keys, 0, conn->session_keys_len);
1351 os_free(conn->session_keys);
1353 conn->session_keys_len = 0;
1356 conn->session_keys = os_malloc(key_len);
1357 if (conn->session_keys == NULL)
1359 os_memcpy(conn->session_keys, key, key_len);
1360 conn->session_keys_len = key_len;
1362 conn->session_keys = NULL;
1363 conn->session_keys_len = 0;
1367 #else /* GNUTLS_IA */
1369 #endif /* GNUTLS_IA */