2 * TLSv1 client - read handshake message
3 * Copyright (c) 2006-2011, 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 int tlsv1_process_diffie_hellman(struct tlsv1_client *conn,
413 const u8 *buf, size_t len)
417 tlsv1_client_free_dh(conn);
424 conn->dh_p_len = WPA_GET_BE16(pos);
426 if (conn->dh_p_len == 0 || end - pos < (int) conn->dh_p_len) {
427 wpa_printf(MSG_DEBUG, "TLSv1: Invalid dh_p length %lu",
428 (unsigned long) conn->dh_p_len);
431 conn->dh_p = os_malloc(conn->dh_p_len);
432 if (conn->dh_p == NULL)
434 os_memcpy(conn->dh_p, pos, conn->dh_p_len);
435 pos += conn->dh_p_len;
436 wpa_hexdump(MSG_DEBUG, "TLSv1: DH p (prime)",
437 conn->dh_p, conn->dh_p_len);
441 conn->dh_g_len = WPA_GET_BE16(pos);
443 if (conn->dh_g_len == 0 || end - pos < (int) conn->dh_g_len)
445 conn->dh_g = os_malloc(conn->dh_g_len);
446 if (conn->dh_g == NULL)
448 os_memcpy(conn->dh_g, pos, conn->dh_g_len);
449 pos += conn->dh_g_len;
450 wpa_hexdump(MSG_DEBUG, "TLSv1: DH g (generator)",
451 conn->dh_g, conn->dh_g_len);
452 if (conn->dh_g_len == 1 && conn->dh_g[0] < 2)
457 conn->dh_ys_len = WPA_GET_BE16(pos);
459 if (conn->dh_ys_len == 0 || end - pos < (int) conn->dh_ys_len)
461 conn->dh_ys = os_malloc(conn->dh_ys_len);
462 if (conn->dh_ys == NULL)
464 os_memcpy(conn->dh_ys, pos, conn->dh_ys_len);
465 pos += conn->dh_ys_len;
466 wpa_hexdump(MSG_DEBUG, "TLSv1: DH Ys (server's public value)",
467 conn->dh_ys, conn->dh_ys_len);
472 wpa_printf(MSG_DEBUG, "TLSv1: Processing DH params failed");
473 tlsv1_client_free_dh(conn);
478 static int tls_process_server_key_exchange(struct tlsv1_client *conn, u8 ct,
479 const u8 *in_data, size_t *in_len)
484 const struct tls_cipher_suite *suite;
486 if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
487 wpa_printf(MSG_DEBUG, "TLSv1: Expected Handshake; "
488 "received content type 0x%x", ct);
489 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
490 TLS_ALERT_UNEXPECTED_MESSAGE);
498 wpa_printf(MSG_DEBUG, "TLSv1: Too short ServerKeyExchange "
499 "(Left=%lu)", (unsigned long) left);
500 tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
505 len = WPA_GET_BE24(pos);
510 wpa_printf(MSG_DEBUG, "TLSv1: Mismatch in ServerKeyExchange "
511 "length (len=%lu != left=%lu)",
512 (unsigned long) len, (unsigned long) left);
513 tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
519 if (type == TLS_HANDSHAKE_TYPE_CERTIFICATE_REQUEST)
520 return tls_process_certificate_request(conn, ct, in_data,
522 if (type == TLS_HANDSHAKE_TYPE_SERVER_HELLO_DONE)
523 return tls_process_server_hello_done(conn, ct, in_data,
525 if (type != TLS_HANDSHAKE_TYPE_SERVER_KEY_EXCHANGE) {
526 wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
527 "message %d (expected ServerKeyExchange/"
528 "CertificateRequest/ServerHelloDone)", type);
529 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
530 TLS_ALERT_UNEXPECTED_MESSAGE);
534 wpa_printf(MSG_DEBUG, "TLSv1: Received ServerKeyExchange");
536 if (!tls_server_key_exchange_allowed(conn->rl.cipher_suite)) {
537 wpa_printf(MSG_DEBUG, "TLSv1: ServerKeyExchange not allowed "
538 "with the selected cipher suite");
539 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
540 TLS_ALERT_UNEXPECTED_MESSAGE);
544 wpa_hexdump(MSG_DEBUG, "TLSv1: ServerKeyExchange", pos, len);
545 suite = tls_get_cipher_suite(conn->rl.cipher_suite);
546 if (suite && suite->key_exchange == TLS_KEY_X_DH_anon) {
547 if (tlsv1_process_diffie_hellman(conn, pos, len) < 0) {
548 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
549 TLS_ALERT_DECODE_ERROR);
553 wpa_printf(MSG_DEBUG, "TLSv1: UnexpectedServerKeyExchange");
554 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
555 TLS_ALERT_UNEXPECTED_MESSAGE);
559 *in_len = end - in_data;
561 conn->state = SERVER_CERTIFICATE_REQUEST;
567 static int tls_process_certificate_request(struct tlsv1_client *conn, u8 ct,
568 const u8 *in_data, size_t *in_len)
574 if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
575 wpa_printf(MSG_DEBUG, "TLSv1: Expected Handshake; "
576 "received content type 0x%x", ct);
577 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
578 TLS_ALERT_UNEXPECTED_MESSAGE);
586 wpa_printf(MSG_DEBUG, "TLSv1: Too short CertificateRequest "
587 "(left=%lu)", (unsigned long) left);
588 tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
593 len = WPA_GET_BE24(pos);
598 wpa_printf(MSG_DEBUG, "TLSv1: Mismatch in CertificateRequest "
599 "length (len=%lu != left=%lu)",
600 (unsigned long) len, (unsigned long) left);
601 tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
607 if (type == TLS_HANDSHAKE_TYPE_SERVER_HELLO_DONE)
608 return tls_process_server_hello_done(conn, ct, in_data,
610 if (type != TLS_HANDSHAKE_TYPE_CERTIFICATE_REQUEST) {
611 wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
612 "message %d (expected CertificateRequest/"
613 "ServerHelloDone)", type);
614 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
615 TLS_ALERT_UNEXPECTED_MESSAGE);
619 wpa_printf(MSG_DEBUG, "TLSv1: Received CertificateRequest");
621 conn->certificate_requested = 1;
623 *in_len = end - in_data;
625 conn->state = SERVER_HELLO_DONE;
631 static int tls_process_server_hello_done(struct tlsv1_client *conn, u8 ct,
632 const u8 *in_data, size_t *in_len)
638 if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
639 wpa_printf(MSG_DEBUG, "TLSv1: Expected Handshake; "
640 "received content type 0x%x", ct);
641 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
642 TLS_ALERT_UNEXPECTED_MESSAGE);
650 wpa_printf(MSG_DEBUG, "TLSv1: Too short ServerHelloDone "
651 "(left=%lu)", (unsigned long) left);
652 tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
657 len = WPA_GET_BE24(pos);
662 wpa_printf(MSG_DEBUG, "TLSv1: Mismatch in ServerHelloDone "
663 "length (len=%lu != left=%lu)",
664 (unsigned long) len, (unsigned long) left);
665 tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
670 if (type != TLS_HANDSHAKE_TYPE_SERVER_HELLO_DONE) {
671 wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
672 "message %d (expected ServerHelloDone)", type);
673 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
674 TLS_ALERT_UNEXPECTED_MESSAGE);
678 wpa_printf(MSG_DEBUG, "TLSv1: Received ServerHelloDone");
680 *in_len = end - in_data;
682 conn->state = CLIENT_KEY_EXCHANGE;
688 static int tls_process_server_change_cipher_spec(struct tlsv1_client *conn,
689 u8 ct, const u8 *in_data,
695 if (ct != TLS_CONTENT_TYPE_CHANGE_CIPHER_SPEC) {
696 wpa_printf(MSG_DEBUG, "TLSv1: Expected ChangeCipherSpec; "
697 "received content type 0x%x", ct);
698 if (conn->use_session_ticket) {
700 wpa_printf(MSG_DEBUG, "TLSv1: Server may have "
701 "rejected SessionTicket");
702 conn->use_session_ticket = 0;
704 /* Notify upper layers that SessionTicket failed */
705 res = conn->session_ticket_cb(
706 conn->session_ticket_cb_ctx, NULL, 0, NULL,
709 wpa_printf(MSG_DEBUG, "TLSv1: SessionTicket "
710 "callback indicated failure");
711 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
712 TLS_ALERT_HANDSHAKE_FAILURE);
716 conn->state = SERVER_CERTIFICATE;
717 return tls_process_certificate(conn, ct, in_data,
720 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
721 TLS_ALERT_UNEXPECTED_MESSAGE);
729 wpa_printf(MSG_DEBUG, "TLSv1: Too short ChangeCipherSpec");
730 tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
734 if (*pos != TLS_CHANGE_CIPHER_SPEC) {
735 wpa_printf(MSG_DEBUG, "TLSv1: Expected ChangeCipherSpec; "
736 "received data 0x%x", *pos);
737 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
738 TLS_ALERT_UNEXPECTED_MESSAGE);
742 wpa_printf(MSG_DEBUG, "TLSv1: Received ChangeCipherSpec");
743 if (tlsv1_record_change_read_cipher(&conn->rl) < 0) {
744 wpa_printf(MSG_DEBUG, "TLSv1: Failed to change read cipher "
746 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
747 TLS_ALERT_INTERNAL_ERROR);
751 *in_len = pos + 1 - in_data;
753 conn->state = SERVER_FINISHED;
759 static int tls_process_server_finished(struct tlsv1_client *conn, u8 ct,
760 const u8 *in_data, size_t *in_len)
763 size_t left, len, hlen;
764 u8 verify_data[TLS_VERIFY_DATA_LEN];
765 u8 hash[MD5_MAC_LEN + SHA1_MAC_LEN];
767 if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
768 wpa_printf(MSG_DEBUG, "TLSv1: Expected Finished; "
769 "received content type 0x%x", ct);
770 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
771 TLS_ALERT_UNEXPECTED_MESSAGE);
779 wpa_printf(MSG_DEBUG, "TLSv1: Too short record (left=%lu) for "
781 (unsigned long) left);
782 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
783 TLS_ALERT_DECODE_ERROR);
787 if (pos[0] != TLS_HANDSHAKE_TYPE_FINISHED) {
788 wpa_printf(MSG_DEBUG, "TLSv1: Expected Finished; received "
789 "type 0x%x", pos[0]);
790 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
791 TLS_ALERT_UNEXPECTED_MESSAGE);
795 len = WPA_GET_BE24(pos + 1);
801 wpa_printf(MSG_DEBUG, "TLSv1: Too short buffer for Finished "
802 "(len=%lu > left=%lu)",
803 (unsigned long) len, (unsigned long) left);
804 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
805 TLS_ALERT_DECODE_ERROR);
809 if (len != TLS_VERIFY_DATA_LEN) {
810 wpa_printf(MSG_DEBUG, "TLSv1: Unexpected verify_data length "
811 "in Finished: %lu (expected %d)",
812 (unsigned long) len, TLS_VERIFY_DATA_LEN);
813 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
814 TLS_ALERT_DECODE_ERROR);
817 wpa_hexdump(MSG_MSGDUMP, "TLSv1: verify_data in Finished",
818 pos, TLS_VERIFY_DATA_LEN);
821 if (conn->rl.tls_version >= TLS_VERSION_1_2) {
822 hlen = SHA256_MAC_LEN;
823 if (conn->verify.sha256_server == NULL ||
824 crypto_hash_finish(conn->verify.sha256_server, hash, &hlen)
826 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
827 TLS_ALERT_INTERNAL_ERROR);
828 conn->verify.sha256_server = NULL;
831 conn->verify.sha256_server = NULL;
833 #endif /* CONFIG_TLSV12 */
836 if (conn->verify.md5_server == NULL ||
837 crypto_hash_finish(conn->verify.md5_server, hash, &hlen) < 0) {
838 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
839 TLS_ALERT_INTERNAL_ERROR);
840 conn->verify.md5_server = NULL;
841 crypto_hash_finish(conn->verify.sha1_server, NULL, NULL);
842 conn->verify.sha1_server = NULL;
845 conn->verify.md5_server = NULL;
847 if (conn->verify.sha1_server == NULL ||
848 crypto_hash_finish(conn->verify.sha1_server, hash + MD5_MAC_LEN,
850 conn->verify.sha1_server = NULL;
851 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
852 TLS_ALERT_INTERNAL_ERROR);
855 conn->verify.sha1_server = NULL;
856 hlen = MD5_MAC_LEN + SHA1_MAC_LEN;
860 #endif /* CONFIG_TLSV12 */
862 if (tls_prf(conn->rl.tls_version,
863 conn->master_secret, TLS_MASTER_SECRET_LEN,
864 "server finished", hash, hlen,
865 verify_data, TLS_VERIFY_DATA_LEN)) {
866 wpa_printf(MSG_DEBUG, "TLSv1: Failed to derive verify_data");
867 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
868 TLS_ALERT_DECRYPT_ERROR);
871 wpa_hexdump_key(MSG_DEBUG, "TLSv1: verify_data (server)",
872 verify_data, TLS_VERIFY_DATA_LEN);
874 if (os_memcmp(pos, verify_data, TLS_VERIFY_DATA_LEN) != 0) {
875 wpa_printf(MSG_INFO, "TLSv1: Mismatch in verify_data");
879 wpa_printf(MSG_DEBUG, "TLSv1: Received Finished");
881 *in_len = end - in_data;
883 conn->state = (conn->session_resumed || conn->use_session_ticket) ?
884 CHANGE_CIPHER_SPEC : ACK_FINISHED;
890 static int tls_process_application_data(struct tlsv1_client *conn, u8 ct,
891 const u8 *in_data, size_t *in_len,
892 u8 **out_data, size_t *out_len)
897 if (ct != TLS_CONTENT_TYPE_APPLICATION_DATA) {
898 wpa_printf(MSG_DEBUG, "TLSv1: Expected Application Data; "
899 "received content type 0x%x", ct);
900 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
901 TLS_ALERT_UNEXPECTED_MESSAGE);
908 wpa_hexdump(MSG_DEBUG, "TLSv1: Application Data included in Handshake",
911 *out_data = os_malloc(left);
913 os_memcpy(*out_data, pos, left);
921 int tlsv1_client_process_handshake(struct tlsv1_client *conn, u8 ct,
922 const u8 *buf, size_t *len,
923 u8 **out_data, size_t *out_len)
925 if (ct == TLS_CONTENT_TYPE_ALERT) {
927 wpa_printf(MSG_DEBUG, "TLSv1: Alert underflow");
928 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
929 TLS_ALERT_DECODE_ERROR);
932 wpa_printf(MSG_DEBUG, "TLSv1: Received alert %d:%d",
935 conn->state = FAILED;
939 if (ct == TLS_CONTENT_TYPE_HANDSHAKE && *len >= 4 &&
940 buf[0] == TLS_HANDSHAKE_TYPE_HELLO_REQUEST) {
941 size_t hr_len = WPA_GET_BE24(buf + 1);
942 if (hr_len > *len - 4) {
943 wpa_printf(MSG_DEBUG, "TLSv1: HelloRequest underflow");
944 tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
945 TLS_ALERT_DECODE_ERROR);
948 wpa_printf(MSG_DEBUG, "TLSv1: Ignored HelloRequest");
953 switch (conn->state) {
955 if (tls_process_server_hello(conn, ct, buf, len))
958 case SERVER_CERTIFICATE:
959 if (tls_process_certificate(conn, ct, buf, len))
962 case SERVER_KEY_EXCHANGE:
963 if (tls_process_server_key_exchange(conn, ct, buf, len))
966 case SERVER_CERTIFICATE_REQUEST:
967 if (tls_process_certificate_request(conn, ct, buf, len))
970 case SERVER_HELLO_DONE:
971 if (tls_process_server_hello_done(conn, ct, buf, len))
974 case SERVER_CHANGE_CIPHER_SPEC:
975 if (tls_process_server_change_cipher_spec(conn, ct, buf, len))
978 case SERVER_FINISHED:
979 if (tls_process_server_finished(conn, ct, buf, len))
984 tls_process_application_data(conn, ct, buf, len, out_data,
989 wpa_printf(MSG_DEBUG, "TLSv1: Unexpected state %d "
990 "while processing received message",
995 if (ct == TLS_CONTENT_TYPE_HANDSHAKE)
996 tls_verify_hash_add(&conn->verify, buf, *len);