2 * TLSv1 client - read handshake message
3 * Copyright (c) 2006-2014, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
12 #include "crypto/md5.h"
13 #include "crypto/sha1.h"
14 #include "crypto/sha256.h"
15 #include "crypto/tls.h"
17 #include "tlsv1_common.h"
18 #include "tlsv1_record.h"
19 #include "tlsv1_client.h"
20 #include "tlsv1_client_i.h"
22 static int tls_process_server_key_exchange(struct tlsv1_client *conn, u8 ct,
23 const u8 *in_data, size_t *in_len);
24 static int tls_process_certificate_request(struct tlsv1_client *conn, u8 ct,
25 const u8 *in_data, size_t *in_len);
26 static int tls_process_server_hello_done(struct tlsv1_client *conn, u8 ct,
27 const u8 *in_data, size_t *in_len);
30 static int tls_process_server_hello(struct tlsv1_client *conn, u8 ct,
31 const u8 *in_data, size_t *in_len)
38 if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
39 wpa_printf(MSG_DEBUG, "TLSv1: Expected Handshake; "
40 "received content type 0x%x", ct);
41 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
42 TLS_ALERT_UNEXPECTED_MESSAGE);
52 /* HandshakeType msg_type */
53 if (*pos != TLS_HANDSHAKE_TYPE_SERVER_HELLO) {
54 wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
55 "message %d (expected ServerHello)", *pos);
56 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
57 TLS_ALERT_UNEXPECTED_MESSAGE);
60 wpa_printf(MSG_DEBUG, "TLSv1: Received ServerHello");
63 len = WPA_GET_BE24(pos);
70 /* body - ServerHello */
72 wpa_hexdump(MSG_MSGDUMP, "TLSv1: ServerHello", pos, len);
75 /* ProtocolVersion server_version */
78 tls_version = WPA_GET_BE16(pos);
79 if (!tls_version_ok(tls_version)) {
80 wpa_printf(MSG_DEBUG, "TLSv1: Unexpected protocol version in "
81 "ServerHello %u.%u", pos[0], pos[1]);
82 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
83 TLS_ALERT_PROTOCOL_VERSION);
88 wpa_printf(MSG_DEBUG, "TLSv1: Using TLS v%s",
89 tls_version_str(tls_version));
90 conn->rl.tls_version = tls_version;
93 if (end - pos < TLS_RANDOM_LEN)
96 os_memcpy(conn->server_random, pos, TLS_RANDOM_LEN);
97 pos += TLS_RANDOM_LEN;
98 wpa_hexdump(MSG_MSGDUMP, "TLSv1: server_random",
99 conn->server_random, TLS_RANDOM_LEN);
101 /* SessionID session_id */
104 if (end - pos < 1 + *pos || *pos > TLS_SESSION_ID_MAX_LEN)
106 if (conn->session_id_len && conn->session_id_len == *pos &&
107 os_memcmp(conn->session_id, pos + 1, conn->session_id_len) == 0) {
108 pos += 1 + conn->session_id_len;
109 wpa_printf(MSG_DEBUG, "TLSv1: Resuming old session");
110 conn->session_resumed = 1;
112 conn->session_id_len = *pos;
114 os_memcpy(conn->session_id, pos, conn->session_id_len);
115 pos += conn->session_id_len;
117 wpa_hexdump(MSG_MSGDUMP, "TLSv1: session_id",
118 conn->session_id, conn->session_id_len);
120 /* CipherSuite cipher_suite */
123 cipher_suite = WPA_GET_BE16(pos);
125 for (i = 0; i < conn->num_cipher_suites; i++) {
126 if (cipher_suite == conn->cipher_suites[i])
129 if (i == conn->num_cipher_suites) {
130 wpa_printf(MSG_INFO, "TLSv1: Server selected unexpected "
131 "cipher suite 0x%04x", cipher_suite);
132 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
133 TLS_ALERT_ILLEGAL_PARAMETER);
137 if (conn->session_resumed && cipher_suite != conn->prev_cipher_suite) {
138 wpa_printf(MSG_DEBUG, "TLSv1: Server selected a different "
139 "cipher suite for a resumed connection (0x%04x != "
140 "0x%04x)", cipher_suite, conn->prev_cipher_suite);
141 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
142 TLS_ALERT_ILLEGAL_PARAMETER);
146 if (tlsv1_record_set_cipher_suite(&conn->rl, cipher_suite) < 0) {
147 wpa_printf(MSG_DEBUG, "TLSv1: Failed to set CipherSuite for "
149 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
150 TLS_ALERT_INTERNAL_ERROR);
154 conn->prev_cipher_suite = cipher_suite;
156 /* CompressionMethod compression_method */
159 if (*pos != TLS_COMPRESSION_NULL) {
160 wpa_printf(MSG_INFO, "TLSv1: Server selected unexpected "
161 "compression 0x%02x", *pos);
162 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
163 TLS_ALERT_ILLEGAL_PARAMETER);
169 /* TODO: ServerHello extensions */
170 wpa_hexdump(MSG_DEBUG, "TLSv1: Unexpected extra data in the "
171 "end of ServerHello", pos, end - pos);
175 if (conn->session_ticket_included && conn->session_ticket_cb) {
176 /* TODO: include SessionTicket extension if one was included in
178 int res = conn->session_ticket_cb(
179 conn->session_ticket_cb_ctx, NULL, 0,
180 conn->client_random, conn->server_random,
181 conn->master_secret);
183 wpa_printf(MSG_DEBUG, "TLSv1: SessionTicket callback "
184 "indicated failure");
185 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
186 TLS_ALERT_HANDSHAKE_FAILURE);
189 conn->use_session_ticket = !!res;
192 if ((conn->session_resumed || conn->use_session_ticket) &&
193 tls_derive_keys(conn, NULL, 0)) {
194 wpa_printf(MSG_DEBUG, "TLSv1: Failed to derive keys");
195 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
196 TLS_ALERT_INTERNAL_ERROR);
200 *in_len = end - in_data;
202 conn->state = (conn->session_resumed || conn->use_session_ticket) ?
203 SERVER_CHANGE_CIPHER_SPEC : SERVER_CERTIFICATE;
208 wpa_printf(MSG_DEBUG, "TLSv1: Failed to decode ServerHello");
209 tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
214 static int tls_process_certificate(struct tlsv1_client *conn, u8 ct,
215 const u8 *in_data, size_t *in_len)
218 size_t left, len, list_len, cert_len, idx;
220 struct x509_certificate *chain = NULL, *last = NULL, *cert;
223 if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
224 wpa_printf(MSG_DEBUG, "TLSv1: Expected Handshake; "
225 "received content type 0x%x", ct);
226 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
227 TLS_ALERT_UNEXPECTED_MESSAGE);
235 wpa_printf(MSG_DEBUG, "TLSv1: Too short Certificate message "
236 "(len=%lu)", (unsigned long) left);
237 tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
242 len = WPA_GET_BE24(pos);
247 wpa_printf(MSG_DEBUG, "TLSv1: Unexpected Certificate message "
248 "length (len=%lu != left=%lu)",
249 (unsigned long) len, (unsigned long) left);
250 tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
254 if (type == TLS_HANDSHAKE_TYPE_SERVER_KEY_EXCHANGE)
255 return tls_process_server_key_exchange(conn, ct, in_data,
257 if (type == TLS_HANDSHAKE_TYPE_CERTIFICATE_REQUEST)
258 return tls_process_certificate_request(conn, ct, in_data,
260 if (type == TLS_HANDSHAKE_TYPE_SERVER_HELLO_DONE)
261 return tls_process_server_hello_done(conn, ct, in_data,
263 if (type != TLS_HANDSHAKE_TYPE_CERTIFICATE) {
264 wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
265 "message %d (expected Certificate/"
266 "ServerKeyExchange/CertificateRequest/"
267 "ServerHelloDone)", type);
268 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
269 TLS_ALERT_UNEXPECTED_MESSAGE);
273 wpa_printf(MSG_DEBUG,
274 "TLSv1: Received Certificate (certificate_list len %lu)",
275 (unsigned long) len);
278 * opaque ASN.1Cert<2^24-1>;
281 * ASN.1Cert certificate_list<1..2^24-1>;
288 wpa_printf(MSG_DEBUG, "TLSv1: Too short Certificate "
289 "(left=%lu)", (unsigned long) left);
290 tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
294 list_len = WPA_GET_BE24(pos);
297 if ((size_t) (end - pos) != list_len) {
298 wpa_printf(MSG_DEBUG, "TLSv1: Unexpected certificate_list "
299 "length (len=%lu left=%lu)",
300 (unsigned long) list_len,
301 (unsigned long) (end - pos));
302 tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
309 wpa_printf(MSG_DEBUG, "TLSv1: Failed to parse "
311 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
312 TLS_ALERT_DECODE_ERROR);
313 x509_certificate_chain_free(chain);
317 cert_len = WPA_GET_BE24(pos);
320 if ((size_t) (end - pos) < cert_len) {
321 wpa_printf(MSG_DEBUG, "TLSv1: Unexpected certificate "
322 "length (len=%lu left=%lu)",
323 (unsigned long) cert_len,
324 (unsigned long) (end - pos));
325 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
326 TLS_ALERT_DECODE_ERROR);
327 x509_certificate_chain_free(chain);
331 wpa_printf(MSG_DEBUG, "TLSv1: Certificate %lu (len %lu)",
332 (unsigned long) idx, (unsigned long) cert_len);
335 crypto_public_key_free(conn->server_rsa_key);
336 if (tls_parse_cert(pos, cert_len,
337 &conn->server_rsa_key)) {
338 wpa_printf(MSG_DEBUG, "TLSv1: Failed to parse "
340 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
341 TLS_ALERT_BAD_CERTIFICATE);
342 x509_certificate_chain_free(chain);
347 cert = x509_certificate_parse(pos, cert_len);
349 wpa_printf(MSG_DEBUG, "TLSv1: Failed to parse "
351 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
352 TLS_ALERT_BAD_CERTIFICATE);
353 x509_certificate_chain_free(chain);
368 x509_certificate_chain_validate(conn->cred->trusted_certs, chain,
369 &reason, conn->disable_time_checks)
372 wpa_printf(MSG_DEBUG, "TLSv1: Server certificate chain "
373 "validation failed (reason=%d)", reason);
375 case X509_VALIDATE_BAD_CERTIFICATE:
376 tls_reason = TLS_ALERT_BAD_CERTIFICATE;
378 case X509_VALIDATE_UNSUPPORTED_CERTIFICATE:
379 tls_reason = TLS_ALERT_UNSUPPORTED_CERTIFICATE;
381 case X509_VALIDATE_CERTIFICATE_REVOKED:
382 tls_reason = TLS_ALERT_CERTIFICATE_REVOKED;
384 case X509_VALIDATE_CERTIFICATE_EXPIRED:
385 tls_reason = TLS_ALERT_CERTIFICATE_EXPIRED;
387 case X509_VALIDATE_CERTIFICATE_UNKNOWN:
388 tls_reason = TLS_ALERT_CERTIFICATE_UNKNOWN;
390 case X509_VALIDATE_UNKNOWN_CA:
391 tls_reason = TLS_ALERT_UNKNOWN_CA;
394 tls_reason = TLS_ALERT_BAD_CERTIFICATE;
397 tls_alert(conn, TLS_ALERT_LEVEL_FATAL, tls_reason);
398 x509_certificate_chain_free(chain);
402 x509_certificate_chain_free(chain);
404 *in_len = end - in_data;
406 conn->state = SERVER_KEY_EXCHANGE;
412 static unsigned int count_bits(const u8 *val, size_t len)
418 for (i = 0; i < len; i++) {
425 bits = (len - i - 1) * 8;
436 static int tlsv1_process_diffie_hellman(struct tlsv1_client *conn,
437 const u8 *buf, size_t len,
438 tls_key_exchange key_exchange)
440 const u8 *pos, *end, *server_params, *server_params_end;
445 tlsv1_client_free_dh(conn);
453 val = WPA_GET_BE16(pos);
455 if (val == 0 || val > (size_t) (end - pos)) {
456 wpa_printf(MSG_DEBUG, "TLSv1: Invalid dh_p length %u", val);
459 conn->dh_p_len = val;
460 bits = count_bits(pos, conn->dh_p_len);
462 wpa_printf(MSG_INFO, "TLSv1: Reject under 768-bit DH prime (insecure; only %u bits)",
464 wpa_hexdump(MSG_DEBUG, "TLSv1: Rejected DH prime",
465 pos, conn->dh_p_len);
468 conn->dh_p = os_malloc(conn->dh_p_len);
469 if (conn->dh_p == NULL)
471 os_memcpy(conn->dh_p, pos, conn->dh_p_len);
472 pos += conn->dh_p_len;
473 wpa_hexdump(MSG_DEBUG, "TLSv1: DH p (prime)",
474 conn->dh_p, conn->dh_p_len);
478 val = WPA_GET_BE16(pos);
480 if (val == 0 || val > (size_t) (end - pos))
482 conn->dh_g_len = val;
483 conn->dh_g = os_malloc(conn->dh_g_len);
484 if (conn->dh_g == NULL)
486 os_memcpy(conn->dh_g, pos, conn->dh_g_len);
487 pos += conn->dh_g_len;
488 wpa_hexdump(MSG_DEBUG, "TLSv1: DH g (generator)",
489 conn->dh_g, conn->dh_g_len);
490 if (conn->dh_g_len == 1 && conn->dh_g[0] < 2)
495 val = WPA_GET_BE16(pos);
497 if (val == 0 || val > (size_t) (end - pos))
499 conn->dh_ys_len = val;
500 conn->dh_ys = os_malloc(conn->dh_ys_len);
501 if (conn->dh_ys == NULL)
503 os_memcpy(conn->dh_ys, pos, conn->dh_ys_len);
504 pos += conn->dh_ys_len;
505 wpa_hexdump(MSG_DEBUG, "TLSv1: DH Ys (server's public value)",
506 conn->dh_ys, conn->dh_ys_len);
507 server_params_end = pos;
509 if (key_exchange == TLS_KEY_X_DHE_RSA) {
510 u8 hash[MD5_MAC_LEN + SHA1_MAC_LEN];
513 if (conn->rl.tls_version == TLS_VERSION_1_2) {
517 * TLS v1.2 adds explicit indication of the used
518 * signature and hash algorithms.
521 * HashAlgorithm hash;
522 * SignatureAlgorithm signature;
523 * } SignatureAndHashAlgorithm;
527 if (pos[0] != TLS_HASH_ALG_SHA256 ||
528 pos[1] != TLS_SIGN_ALG_RSA) {
529 wpa_printf(MSG_DEBUG, "TLSv1.2: Unsupported hash(%u)/signature(%u) algorithm",
535 hlen = tlsv12_key_x_server_params_hash(
536 conn->rl.tls_version, conn->client_random,
537 conn->server_random, server_params,
538 server_params_end - server_params, hash);
539 #else /* CONFIG_TLSV12 */
541 #endif /* CONFIG_TLSV12 */
543 hlen = tls_key_x_server_params_hash(
544 conn->rl.tls_version, conn->client_random,
545 conn->server_random, server_params,
546 server_params_end - server_params, hash);
551 wpa_hexdump(MSG_MSGDUMP, "TLSv1: ServerKeyExchange hash",
554 if (tls_verify_signature(conn->rl.tls_version,
555 conn->server_rsa_key,
556 hash, hlen, pos, end - pos,
564 wpa_printf(MSG_DEBUG, "TLSv1: Processing DH params failed");
565 tlsv1_client_free_dh(conn);
570 static int tls_process_server_key_exchange(struct tlsv1_client *conn, u8 ct,
571 const u8 *in_data, size_t *in_len)
576 const struct tls_cipher_suite *suite;
578 if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
579 wpa_printf(MSG_DEBUG, "TLSv1: Expected Handshake; "
580 "received content type 0x%x", ct);
581 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
582 TLS_ALERT_UNEXPECTED_MESSAGE);
590 wpa_printf(MSG_DEBUG, "TLSv1: Too short ServerKeyExchange "
591 "(Left=%lu)", (unsigned long) left);
592 tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
597 len = WPA_GET_BE24(pos);
602 wpa_printf(MSG_DEBUG, "TLSv1: Mismatch in ServerKeyExchange "
603 "length (len=%lu != left=%lu)",
604 (unsigned long) len, (unsigned long) left);
605 tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
611 if (type == TLS_HANDSHAKE_TYPE_CERTIFICATE_REQUEST)
612 return tls_process_certificate_request(conn, ct, in_data,
614 if (type == TLS_HANDSHAKE_TYPE_SERVER_HELLO_DONE)
615 return tls_process_server_hello_done(conn, ct, in_data,
617 if (type != TLS_HANDSHAKE_TYPE_SERVER_KEY_EXCHANGE) {
618 wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
619 "message %d (expected ServerKeyExchange/"
620 "CertificateRequest/ServerHelloDone)", type);
621 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
622 TLS_ALERT_UNEXPECTED_MESSAGE);
626 wpa_printf(MSG_DEBUG, "TLSv1: Received ServerKeyExchange");
628 if (!tls_server_key_exchange_allowed(conn->rl.cipher_suite)) {
629 wpa_printf(MSG_DEBUG, "TLSv1: ServerKeyExchange not allowed "
630 "with the selected cipher suite");
631 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
632 TLS_ALERT_UNEXPECTED_MESSAGE);
636 wpa_hexdump(MSG_DEBUG, "TLSv1: ServerKeyExchange", pos, len);
637 suite = tls_get_cipher_suite(conn->rl.cipher_suite);
638 if (suite && (suite->key_exchange == TLS_KEY_X_DH_anon ||
639 suite->key_exchange == TLS_KEY_X_DHE_RSA)) {
640 if (tlsv1_process_diffie_hellman(conn, pos, len,
641 suite->key_exchange) < 0) {
642 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
643 TLS_ALERT_DECODE_ERROR);
647 wpa_printf(MSG_DEBUG, "TLSv1: UnexpectedServerKeyExchange");
648 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
649 TLS_ALERT_UNEXPECTED_MESSAGE);
653 *in_len = end - in_data;
655 conn->state = SERVER_CERTIFICATE_REQUEST;
661 static int tls_process_certificate_request(struct tlsv1_client *conn, u8 ct,
662 const u8 *in_data, size_t *in_len)
668 if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
669 wpa_printf(MSG_DEBUG, "TLSv1: Expected Handshake; "
670 "received content type 0x%x", ct);
671 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
672 TLS_ALERT_UNEXPECTED_MESSAGE);
680 wpa_printf(MSG_DEBUG, "TLSv1: Too short CertificateRequest "
681 "(left=%lu)", (unsigned long) left);
682 tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
687 len = WPA_GET_BE24(pos);
692 wpa_printf(MSG_DEBUG, "TLSv1: Mismatch in CertificateRequest "
693 "length (len=%lu != left=%lu)",
694 (unsigned long) len, (unsigned long) left);
695 tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
701 if (type == TLS_HANDSHAKE_TYPE_SERVER_HELLO_DONE)
702 return tls_process_server_hello_done(conn, ct, in_data,
704 if (type != TLS_HANDSHAKE_TYPE_CERTIFICATE_REQUEST) {
705 wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
706 "message %d (expected CertificateRequest/"
707 "ServerHelloDone)", type);
708 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
709 TLS_ALERT_UNEXPECTED_MESSAGE);
713 wpa_printf(MSG_DEBUG, "TLSv1: Received CertificateRequest");
715 conn->certificate_requested = 1;
717 *in_len = end - in_data;
719 conn->state = SERVER_HELLO_DONE;
725 static int tls_process_server_hello_done(struct tlsv1_client *conn, u8 ct,
726 const u8 *in_data, size_t *in_len)
732 if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
733 wpa_printf(MSG_DEBUG, "TLSv1: Expected Handshake; "
734 "received content type 0x%x", ct);
735 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
736 TLS_ALERT_UNEXPECTED_MESSAGE);
744 wpa_printf(MSG_DEBUG, "TLSv1: Too short ServerHelloDone "
745 "(left=%lu)", (unsigned long) left);
746 tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
751 len = WPA_GET_BE24(pos);
756 wpa_printf(MSG_DEBUG, "TLSv1: Mismatch in ServerHelloDone "
757 "length (len=%lu != left=%lu)",
758 (unsigned long) len, (unsigned long) left);
759 tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
764 if (type != TLS_HANDSHAKE_TYPE_SERVER_HELLO_DONE) {
765 wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
766 "message %d (expected ServerHelloDone)", type);
767 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
768 TLS_ALERT_UNEXPECTED_MESSAGE);
772 wpa_printf(MSG_DEBUG, "TLSv1: Received ServerHelloDone");
774 *in_len = end - in_data;
776 conn->state = CLIENT_KEY_EXCHANGE;
782 static int tls_process_server_change_cipher_spec(struct tlsv1_client *conn,
783 u8 ct, const u8 *in_data,
789 if (ct != TLS_CONTENT_TYPE_CHANGE_CIPHER_SPEC) {
790 wpa_printf(MSG_DEBUG, "TLSv1: Expected ChangeCipherSpec; "
791 "received content type 0x%x", ct);
792 if (conn->use_session_ticket) {
794 wpa_printf(MSG_DEBUG, "TLSv1: Server may have "
795 "rejected SessionTicket");
796 conn->use_session_ticket = 0;
798 /* Notify upper layers that SessionTicket failed */
799 res = conn->session_ticket_cb(
800 conn->session_ticket_cb_ctx, NULL, 0, NULL,
803 wpa_printf(MSG_DEBUG, "TLSv1: SessionTicket "
804 "callback indicated failure");
805 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
806 TLS_ALERT_HANDSHAKE_FAILURE);
810 conn->state = SERVER_CERTIFICATE;
811 return tls_process_certificate(conn, ct, in_data,
814 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
815 TLS_ALERT_UNEXPECTED_MESSAGE);
823 wpa_printf(MSG_DEBUG, "TLSv1: Too short ChangeCipherSpec");
824 tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
828 if (*pos != TLS_CHANGE_CIPHER_SPEC) {
829 wpa_printf(MSG_DEBUG, "TLSv1: Expected ChangeCipherSpec; "
830 "received data 0x%x", *pos);
831 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
832 TLS_ALERT_UNEXPECTED_MESSAGE);
836 wpa_printf(MSG_DEBUG, "TLSv1: Received ChangeCipherSpec");
837 if (tlsv1_record_change_read_cipher(&conn->rl) < 0) {
838 wpa_printf(MSG_DEBUG, "TLSv1: Failed to change read cipher "
840 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
841 TLS_ALERT_INTERNAL_ERROR);
845 *in_len = pos + 1 - in_data;
847 conn->state = SERVER_FINISHED;
853 static int tls_process_server_finished(struct tlsv1_client *conn, u8 ct,
854 const u8 *in_data, size_t *in_len)
857 size_t left, len, hlen;
858 u8 verify_data[TLS_VERIFY_DATA_LEN];
859 u8 hash[MD5_MAC_LEN + SHA1_MAC_LEN];
861 if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
862 wpa_printf(MSG_DEBUG, "TLSv1: Expected Finished; "
863 "received content type 0x%x", ct);
864 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
865 TLS_ALERT_UNEXPECTED_MESSAGE);
873 wpa_printf(MSG_DEBUG, "TLSv1: Too short record (left=%lu) for "
875 (unsigned long) left);
876 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
877 TLS_ALERT_DECODE_ERROR);
881 if (pos[0] != TLS_HANDSHAKE_TYPE_FINISHED) {
882 wpa_printf(MSG_DEBUG, "TLSv1: Expected Finished; received "
883 "type 0x%x", pos[0]);
884 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
885 TLS_ALERT_UNEXPECTED_MESSAGE);
889 len = WPA_GET_BE24(pos + 1);
895 wpa_printf(MSG_DEBUG, "TLSv1: Too short buffer for Finished "
896 "(len=%lu > left=%lu)",
897 (unsigned long) len, (unsigned long) left);
898 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
899 TLS_ALERT_DECODE_ERROR);
903 if (len != TLS_VERIFY_DATA_LEN) {
904 wpa_printf(MSG_DEBUG, "TLSv1: Unexpected verify_data length "
905 "in Finished: %lu (expected %d)",
906 (unsigned long) len, TLS_VERIFY_DATA_LEN);
907 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
908 TLS_ALERT_DECODE_ERROR);
911 wpa_hexdump(MSG_MSGDUMP, "TLSv1: verify_data in Finished",
912 pos, TLS_VERIFY_DATA_LEN);
915 if (conn->rl.tls_version >= TLS_VERSION_1_2) {
916 hlen = SHA256_MAC_LEN;
917 if (conn->verify.sha256_server == NULL ||
918 crypto_hash_finish(conn->verify.sha256_server, hash, &hlen)
920 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
921 TLS_ALERT_INTERNAL_ERROR);
922 conn->verify.sha256_server = NULL;
925 conn->verify.sha256_server = NULL;
927 #endif /* CONFIG_TLSV12 */
930 if (conn->verify.md5_server == NULL ||
931 crypto_hash_finish(conn->verify.md5_server, hash, &hlen) < 0) {
932 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
933 TLS_ALERT_INTERNAL_ERROR);
934 conn->verify.md5_server = NULL;
935 crypto_hash_finish(conn->verify.sha1_server, NULL, NULL);
936 conn->verify.sha1_server = NULL;
939 conn->verify.md5_server = NULL;
941 if (conn->verify.sha1_server == NULL ||
942 crypto_hash_finish(conn->verify.sha1_server, hash + MD5_MAC_LEN,
944 conn->verify.sha1_server = NULL;
945 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
946 TLS_ALERT_INTERNAL_ERROR);
949 conn->verify.sha1_server = NULL;
950 hlen = MD5_MAC_LEN + SHA1_MAC_LEN;
954 #endif /* CONFIG_TLSV12 */
956 if (tls_prf(conn->rl.tls_version,
957 conn->master_secret, TLS_MASTER_SECRET_LEN,
958 "server finished", hash, hlen,
959 verify_data, TLS_VERIFY_DATA_LEN)) {
960 wpa_printf(MSG_DEBUG, "TLSv1: Failed to derive verify_data");
961 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
962 TLS_ALERT_DECRYPT_ERROR);
965 wpa_hexdump_key(MSG_DEBUG, "TLSv1: verify_data (server)",
966 verify_data, TLS_VERIFY_DATA_LEN);
968 if (os_memcmp_const(pos, verify_data, TLS_VERIFY_DATA_LEN) != 0) {
969 wpa_printf(MSG_INFO, "TLSv1: Mismatch in verify_data");
970 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
971 TLS_ALERT_DECRYPT_ERROR);
975 wpa_printf(MSG_DEBUG, "TLSv1: Received Finished");
977 *in_len = end - in_data;
979 conn->state = (conn->session_resumed || conn->use_session_ticket) ?
980 CHANGE_CIPHER_SPEC : ACK_FINISHED;
986 static int tls_process_application_data(struct tlsv1_client *conn, u8 ct,
987 const u8 *in_data, size_t *in_len,
988 u8 **out_data, size_t *out_len)
993 if (ct != TLS_CONTENT_TYPE_APPLICATION_DATA) {
994 wpa_printf(MSG_DEBUG, "TLSv1: Expected Application Data; "
995 "received content type 0x%x", ct);
996 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
997 TLS_ALERT_UNEXPECTED_MESSAGE);
1004 wpa_hexdump(MSG_DEBUG, "TLSv1: Application Data included in Handshake",
1007 *out_data = os_malloc(left);
1009 os_memcpy(*out_data, pos, left);
1017 int tlsv1_client_process_handshake(struct tlsv1_client *conn, u8 ct,
1018 const u8 *buf, size_t *len,
1019 u8 **out_data, size_t *out_len)
1021 if (ct == TLS_CONTENT_TYPE_ALERT) {
1023 wpa_printf(MSG_DEBUG, "TLSv1: Alert underflow");
1024 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1025 TLS_ALERT_DECODE_ERROR);
1028 wpa_printf(MSG_DEBUG, "TLSv1: Received alert %d:%d",
1031 conn->state = FAILED;
1035 if (ct == TLS_CONTENT_TYPE_HANDSHAKE && *len >= 4 &&
1036 buf[0] == TLS_HANDSHAKE_TYPE_HELLO_REQUEST) {
1037 size_t hr_len = WPA_GET_BE24(buf + 1);
1038 if (hr_len > *len - 4) {
1039 wpa_printf(MSG_DEBUG, "TLSv1: HelloRequest underflow");
1040 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1041 TLS_ALERT_DECODE_ERROR);
1044 wpa_printf(MSG_DEBUG, "TLSv1: Ignored HelloRequest");
1049 switch (conn->state) {
1051 if (tls_process_server_hello(conn, ct, buf, len))
1054 case SERVER_CERTIFICATE:
1055 if (tls_process_certificate(conn, ct, buf, len))
1058 case SERVER_KEY_EXCHANGE:
1059 if (tls_process_server_key_exchange(conn, ct, buf, len))
1062 case SERVER_CERTIFICATE_REQUEST:
1063 if (tls_process_certificate_request(conn, ct, buf, len))
1066 case SERVER_HELLO_DONE:
1067 if (tls_process_server_hello_done(conn, ct, buf, len))
1070 case SERVER_CHANGE_CIPHER_SPEC:
1071 if (tls_process_server_change_cipher_spec(conn, ct, buf, len))
1074 case SERVER_FINISHED:
1075 if (tls_process_server_finished(conn, ct, buf, len))
1080 tls_process_application_data(conn, ct, buf, len, out_data,
1085 wpa_printf(MSG_DEBUG, "TLSv1: Unexpected state %d "
1086 "while processing received message",
1091 if (ct == TLS_CONTENT_TYPE_HANDSHAKE)
1092 tls_verify_hash_add(&conn->verify, buf, *len);