2
* wpa_supplicant: TLSv1 client (RFC 2246)
3
* Copyright (c) 2006, 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.
23
#include "tlsv1_common.h"
24
#include "tlsv1_client.h"
28
* Support for a message fragmented across several records (RFC 2246, 6.2.1)
33
CLIENT_HELLO, SERVER_HELLO, SERVER_CERTIFICATE,
34
SERVER_KEY_EXCHANGE, SERVER_CERTIFICATE_REQUEST,
35
SERVER_HELLO_DONE, CLIENT_KEY_EXCHANGE, CHANGE_CIPHER_SPEC,
36
SERVER_CHANGE_CIPHER_SPEC, SERVER_FINISHED, ACK_FINISHED,
40
struct tlsv1_record_layer rl;
42
u8 session_id[TLS_SESSION_ID_MAX_LEN];
43
size_t session_id_len;
44
u8 client_random[TLS_RANDOM_LEN];
45
u8 server_random[TLS_RANDOM_LEN];
46
u8 master_secret[TLS_MASTER_SECRET_LEN];
51
unsigned int certificate_requested:1;
52
unsigned int session_resumed:1;
53
unsigned int ticket:1;
54
unsigned int ticket_key:1;
56
struct crypto_public_key *server_rsa_key;
58
struct crypto_hash *verify_md5_client;
59
struct crypto_hash *verify_sha1_client;
60
struct crypto_hash *verify_md5_server;
61
struct crypto_hash *verify_sha1_server;
62
struct crypto_hash *verify_md5_cert;
63
struct crypto_hash *verify_sha1_cert;
65
#define MAX_CIPHER_COUNT 30
66
u16 cipher_suites[MAX_CIPHER_COUNT];
67
size_t num_cipher_suites;
69
u16 prev_cipher_suite;
72
size_t client_hello_ext_len;
74
/* The prime modulus used for Diffie-Hellman */
77
/* The generator used for Diffie-Hellman */
80
/* The server's Diffie-Hellman public value */
84
struct x509_certificate *trusted_certs;
85
struct x509_certificate *client_cert;
86
struct crypto_private_key *client_key;
90
static int tls_derive_keys(struct tlsv1_client *conn,
91
const u8 *pre_master_secret,
92
size_t pre_master_secret_len);
93
static int tls_process_server_key_exchange(struct tlsv1_client *conn, u8 ct,
94
const u8 *in_data, size_t *in_len);
95
static int tls_process_certificate_request(struct tlsv1_client *conn, u8 ct,
96
const u8 *in_data, size_t *in_len);
97
static int tls_process_server_hello_done(struct tlsv1_client *conn, u8 ct,
98
const u8 *in_data, size_t *in_len);
101
static void tls_alert(struct tlsv1_client *conn, u8 level, u8 description)
103
conn->alert_level = level;
104
conn->alert_description = description;
108
static void tls_verify_hash_add(struct tlsv1_client *conn, const u8 *buf,
111
if (conn->verify_md5_client && conn->verify_sha1_client) {
112
crypto_hash_update(conn->verify_md5_client, buf, len);
113
crypto_hash_update(conn->verify_sha1_client, buf, len);
115
if (conn->verify_md5_server && conn->verify_sha1_server) {
116
crypto_hash_update(conn->verify_md5_server, buf, len);
117
crypto_hash_update(conn->verify_sha1_server, buf, len);
119
if (conn->verify_md5_cert && conn->verify_sha1_cert) {
120
crypto_hash_update(conn->verify_md5_cert, buf, len);
121
crypto_hash_update(conn->verify_sha1_cert, buf, len);
126
static u8 * tls_send_alert(struct tlsv1_client *conn,
127
u8 level, u8 description,
130
u8 *alert, *pos, *length;
132
wpa_printf(MSG_DEBUG, "TLSv1: Send Alert(%d:%d)", level, description);
135
alert = os_malloc(10);
142
/* ContentType type */
143
*pos++ = TLS_CONTENT_TYPE_ALERT;
144
/* ProtocolVersion version */
145
WPA_PUT_BE16(pos, TLS_VERSION);
147
/* uint16 length (to be filled) */
150
/* opaque fragment[TLSPlaintext.length] */
153
/* AlertLevel level */
155
/* AlertDescription description */
156
*pos++ = description;
158
WPA_PUT_BE16(length, pos - length - 2);
159
*out_len = pos - alert;
165
static u8 * tls_send_client_hello(struct tlsv1_client *conn,
168
u8 *hello, *end, *pos, *hs_length, *hs_start, *rhdr;
172
wpa_printf(MSG_DEBUG, "TLSv1: Send ClientHello");
176
WPA_PUT_BE32(conn->client_random, now.sec);
177
if (os_get_random(conn->client_random + 4, TLS_RANDOM_LEN - 4)) {
178
wpa_printf(MSG_ERROR, "TLSv1: Could not generate "
182
wpa_hexdump(MSG_MSGDUMP, "TLSv1: client_random",
183
conn->client_random, TLS_RANDOM_LEN);
185
len = 100 + conn->num_cipher_suites * 2 + conn->client_hello_ext_len;
186
hello = os_malloc(len);
192
pos = rhdr + TLS_RECORD_HEADER_LEN;
194
/* opaque fragment[TLSPlaintext.length] */
198
/* HandshakeType msg_type */
199
*pos++ = TLS_HANDSHAKE_TYPE_CLIENT_HELLO;
200
/* uint24 length (to be filled) */
203
/* body - ClientHello */
204
/* ProtocolVersion client_version */
205
WPA_PUT_BE16(pos, TLS_VERSION);
207
/* Random random: uint32 gmt_unix_time, opaque random_bytes */
208
os_memcpy(pos, conn->client_random, TLS_RANDOM_LEN);
209
pos += TLS_RANDOM_LEN;
210
/* SessionID session_id */
211
*pos++ = conn->session_id_len;
212
os_memcpy(pos, conn->session_id, conn->session_id_len);
213
pos += conn->session_id_len;
214
/* CipherSuite cipher_suites<2..2^16-1> */
215
WPA_PUT_BE16(pos, 2 * conn->num_cipher_suites);
217
for (i = 0; i < conn->num_cipher_suites; i++) {
218
WPA_PUT_BE16(pos, conn->cipher_suites[i]);
221
/* CompressionMethod compression_methods<1..2^8-1> */
223
*pos++ = TLS_COMPRESSION_NULL;
225
if (conn->client_hello_ext) {
226
os_memcpy(pos, conn->client_hello_ext,
227
conn->client_hello_ext_len);
228
pos += conn->client_hello_ext_len;
231
WPA_PUT_BE24(hs_length, pos - hs_length - 3);
232
tls_verify_hash_add(conn, hs_start, pos - hs_start);
234
if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
235
rhdr, end - rhdr, pos - hs_start, out_len) < 0) {
236
wpa_printf(MSG_DEBUG, "TLSv1: Failed to create TLS record");
237
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
238
TLS_ALERT_INTERNAL_ERROR);
243
conn->state = SERVER_HELLO;
249
static int tls_process_server_hello(struct tlsv1_client *conn, u8 ct,
250
const u8 *in_data, size_t *in_len)
256
if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
257
wpa_printf(MSG_DEBUG, "TLSv1: Expected Handshake; "
258
"received content type 0x%x", ct);
259
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
260
TLS_ALERT_UNEXPECTED_MESSAGE);
270
/* HandshakeType msg_type */
271
if (*pos != TLS_HANDSHAKE_TYPE_SERVER_HELLO) {
272
wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
273
"message %d (expected ServerHello)", *pos);
274
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
275
TLS_ALERT_UNEXPECTED_MESSAGE);
278
wpa_printf(MSG_DEBUG, "TLSv1: Received ServerHello");
281
len = WPA_GET_BE24(pos);
288
/* body - ServerHello */
290
wpa_hexdump(MSG_MSGDUMP, "TLSv1: ServerHello", pos, len);
293
/* ProtocolVersion server_version */
296
if (WPA_GET_BE16(pos) != TLS_VERSION) {
297
wpa_printf(MSG_DEBUG, "TLSv1: Unexpected protocol version in "
299
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
300
TLS_ALERT_PROTOCOL_VERSION);
306
if (end - pos < TLS_RANDOM_LEN)
309
os_memcpy(conn->server_random, pos, TLS_RANDOM_LEN);
310
pos += TLS_RANDOM_LEN;
311
wpa_hexdump(MSG_MSGDUMP, "TLSv1: server_random",
312
conn->server_random, TLS_RANDOM_LEN);
314
/* SessionID session_id */
317
if (end - pos < 1 + *pos || *pos > TLS_SESSION_ID_MAX_LEN)
319
if (conn->session_id_len && conn->session_id_len == *pos &&
320
os_memcmp(conn->session_id, pos + 1, conn->session_id_len) == 0) {
321
pos += 1 + conn->session_id_len;
322
wpa_printf(MSG_DEBUG, "TLSv1: Resuming old session");
323
conn->session_resumed = 1;
325
conn->session_id_len = *pos;
327
os_memcpy(conn->session_id, pos, conn->session_id_len);
328
pos += conn->session_id_len;
330
wpa_hexdump(MSG_MSGDUMP, "TLSv1: session_id",
331
conn->session_id, conn->session_id_len);
333
/* CipherSuite cipher_suite */
336
cipher_suite = WPA_GET_BE16(pos);
338
for (i = 0; i < conn->num_cipher_suites; i++) {
339
if (cipher_suite == conn->cipher_suites[i])
342
if (i == conn->num_cipher_suites) {
343
wpa_printf(MSG_INFO, "TLSv1: Server selected unexpected "
344
"cipher suite 0x%04x", cipher_suite);
345
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
346
TLS_ALERT_ILLEGAL_PARAMETER);
350
if (conn->session_resumed && cipher_suite != conn->prev_cipher_suite) {
351
wpa_printf(MSG_DEBUG, "TLSv1: Server selected a different "
352
"cipher suite for a resumed connection (0x%04x != "
353
"0x%04x)", cipher_suite, conn->prev_cipher_suite);
354
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
355
TLS_ALERT_ILLEGAL_PARAMETER);
359
if (tlsv1_record_set_cipher_suite(&conn->rl, cipher_suite) < 0) {
360
wpa_printf(MSG_DEBUG, "TLSv1: Failed to set CipherSuite for "
362
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
363
TLS_ALERT_INTERNAL_ERROR);
367
conn->prev_cipher_suite = cipher_suite;
369
if (conn->session_resumed || conn->ticket_key)
370
tls_derive_keys(conn, NULL, 0);
372
/* CompressionMethod compression_method */
375
if (*pos != TLS_COMPRESSION_NULL) {
376
wpa_printf(MSG_INFO, "TLSv1: Server selected unexpected "
377
"compression 0x%02x", *pos);
378
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
379
TLS_ALERT_ILLEGAL_PARAMETER);
385
wpa_hexdump(MSG_DEBUG, "TLSv1: Unexpected extra data in the "
386
"end of ServerHello", pos, end - pos);
390
*in_len = end - in_data;
392
conn->state = (conn->session_resumed || conn->ticket) ?
393
SERVER_CHANGE_CIPHER_SPEC : SERVER_CERTIFICATE;
398
wpa_printf(MSG_DEBUG, "TLSv1: Failed to decode ServerHello");
399
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
404
static int tls_server_key_exchange_allowed(struct tlsv1_client *conn)
406
const struct tls_cipher_suite *suite;
408
/* RFC 2246, Section 7.4.3 */
409
suite = tls_get_cipher_suite(conn->rl.cipher_suite);
413
switch (suite->key_exchange) {
414
case TLS_KEY_X_DHE_DSS:
415
case TLS_KEY_X_DHE_DSS_EXPORT:
416
case TLS_KEY_X_DHE_RSA:
417
case TLS_KEY_X_DHE_RSA_EXPORT:
418
case TLS_KEY_X_DH_anon_EXPORT:
419
case TLS_KEY_X_DH_anon:
421
case TLS_KEY_X_RSA_EXPORT:
422
return 1 /* FIX: public key len > 512 bits */;
429
static int tls_process_certificate(struct tlsv1_client *conn, u8 ct,
430
const u8 *in_data, size_t *in_len)
433
size_t left, len, list_len, cert_len, idx;
435
struct x509_certificate *chain = NULL, *last = NULL, *cert;
438
if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
439
wpa_printf(MSG_DEBUG, "TLSv1: Expected Handshake; "
440
"received content type 0x%x", ct);
441
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
442
TLS_ALERT_UNEXPECTED_MESSAGE);
450
wpa_printf(MSG_DEBUG, "TLSv1: Too short Certificate message "
451
"(len=%lu)", (unsigned long) left);
452
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
457
len = WPA_GET_BE24(pos);
462
wpa_printf(MSG_DEBUG, "TLSv1: Unexpected Certificate message "
463
"length (len=%lu != left=%lu)",
464
(unsigned long) len, (unsigned long) left);
465
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
469
if (type == TLS_HANDSHAKE_TYPE_SERVER_KEY_EXCHANGE)
470
return tls_process_server_key_exchange(conn, ct, in_data,
472
if (type == TLS_HANDSHAKE_TYPE_CERTIFICATE_REQUEST)
473
return tls_process_certificate_request(conn, ct, in_data,
475
if (type == TLS_HANDSHAKE_TYPE_SERVER_HELLO_DONE)
476
return tls_process_server_hello_done(conn, ct, in_data,
478
if (type != TLS_HANDSHAKE_TYPE_CERTIFICATE) {
479
wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
480
"message %d (expected Certificate/"
481
"ServerKeyExchange/CertificateRequest/"
482
"ServerHelloDone)", type);
483
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
484
TLS_ALERT_UNEXPECTED_MESSAGE);
488
wpa_printf(MSG_DEBUG,
489
"TLSv1: Received Certificate (certificate_list len %lu)",
490
(unsigned long) len);
493
* opaque ASN.1Cert<2^24-1>;
496
* ASN.1Cert certificate_list<1..2^24-1>;
503
wpa_printf(MSG_DEBUG, "TLSv1: Too short Certificate "
504
"(left=%lu)", (unsigned long) left);
505
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
509
list_len = WPA_GET_BE24(pos);
512
if ((size_t) (end - pos) != list_len) {
513
wpa_printf(MSG_DEBUG, "TLSv1: Unexpected certificate_list "
514
"length (len=%lu left=%lu)",
515
(unsigned long) list_len,
516
(unsigned long) (end - pos));
517
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
524
wpa_printf(MSG_DEBUG, "TLSv1: Failed to parse "
526
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
527
TLS_ALERT_DECODE_ERROR);
528
x509_certificate_chain_free(chain);
532
cert_len = WPA_GET_BE24(pos);
535
if ((size_t) (end - pos) < cert_len) {
536
wpa_printf(MSG_DEBUG, "TLSv1: Unexpected certificate "
537
"length (len=%lu left=%lu)",
538
(unsigned long) cert_len,
539
(unsigned long) (end - pos));
540
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
541
TLS_ALERT_DECODE_ERROR);
542
x509_certificate_chain_free(chain);
546
wpa_printf(MSG_DEBUG, "TLSv1: Certificate %lu (len %lu)",
547
(unsigned long) idx, (unsigned long) cert_len);
550
crypto_public_key_free(conn->server_rsa_key);
551
if (tls_parse_cert(pos, cert_len,
552
&conn->server_rsa_key)) {
553
wpa_printf(MSG_DEBUG, "TLSv1: Failed to parse "
555
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
556
TLS_ALERT_BAD_CERTIFICATE);
557
x509_certificate_chain_free(chain);
562
cert = x509_certificate_parse(pos, cert_len);
564
wpa_printf(MSG_DEBUG, "TLSv1: Failed to parse "
566
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
567
TLS_ALERT_BAD_CERTIFICATE);
568
x509_certificate_chain_free(chain);
582
if (x509_certificate_chain_validate(conn->trusted_certs, chain,
585
wpa_printf(MSG_DEBUG, "TLSv1: Server certificate chain "
586
"validation failed (reason=%d)", reason);
588
case X509_VALIDATE_BAD_CERTIFICATE:
589
tls_reason = TLS_ALERT_BAD_CERTIFICATE;
591
case X509_VALIDATE_UNSUPPORTED_CERTIFICATE:
592
tls_reason = TLS_ALERT_UNSUPPORTED_CERTIFICATE;
594
case X509_VALIDATE_CERTIFICATE_REVOKED:
595
tls_reason = TLS_ALERT_CERTIFICATE_REVOKED;
597
case X509_VALIDATE_CERTIFICATE_EXPIRED:
598
tls_reason = TLS_ALERT_CERTIFICATE_EXPIRED;
600
case X509_VALIDATE_CERTIFICATE_UNKNOWN:
601
tls_reason = TLS_ALERT_CERTIFICATE_UNKNOWN;
603
case X509_VALIDATE_UNKNOWN_CA:
604
tls_reason = TLS_ALERT_UNKNOWN_CA;
607
tls_reason = TLS_ALERT_BAD_CERTIFICATE;
610
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, tls_reason);
611
x509_certificate_chain_free(chain);
615
x509_certificate_chain_free(chain);
617
*in_len = end - in_data;
619
conn->state = SERVER_KEY_EXCHANGE;
625
static void tlsv1_client_free_dh(struct tlsv1_client *conn)
629
os_free(conn->dh_ys);
630
conn->dh_p = conn->dh_g = conn->dh_ys = NULL;
634
static int tlsv1_process_diffie_hellman(struct tlsv1_client *conn,
635
const u8 *buf, size_t len)
639
tlsv1_client_free_dh(conn);
646
conn->dh_p_len = WPA_GET_BE16(pos);
648
if (conn->dh_p_len == 0 || end - pos < (int) conn->dh_p_len)
650
conn->dh_p = os_malloc(conn->dh_p_len);
651
if (conn->dh_p == NULL)
653
os_memcpy(conn->dh_p, pos, conn->dh_p_len);
654
pos += conn->dh_p_len;
655
wpa_hexdump(MSG_DEBUG, "TLSv1: DH p (prime)",
656
conn->dh_p, conn->dh_p_len);
660
conn->dh_g_len = WPA_GET_BE16(pos);
662
if (conn->dh_g_len == 0 || end - pos < (int) conn->dh_g_len)
664
conn->dh_g = os_malloc(conn->dh_g_len);
665
if (conn->dh_g == NULL)
667
os_memcpy(conn->dh_g, pos, conn->dh_g_len);
668
pos += conn->dh_g_len;
669
wpa_hexdump(MSG_DEBUG, "TLSv1: DH g (generator)",
670
conn->dh_g, conn->dh_g_len);
671
if (conn->dh_g_len == 1 && conn->dh_g[0] < 2)
676
conn->dh_ys_len = WPA_GET_BE16(pos);
678
if (conn->dh_ys_len == 0 || end - pos < (int) conn->dh_ys_len)
680
conn->dh_ys = os_malloc(conn->dh_ys_len);
681
if (conn->dh_ys == NULL)
683
os_memcpy(conn->dh_ys, pos, conn->dh_ys_len);
684
pos += conn->dh_ys_len;
685
wpa_hexdump(MSG_DEBUG, "TLSv1: DH Ys (server's public value)",
686
conn->dh_ys, conn->dh_ys_len);
691
tlsv1_client_free_dh(conn);
696
static int tls_process_server_key_exchange(struct tlsv1_client *conn, u8 ct,
697
const u8 *in_data, size_t *in_len)
702
const struct tls_cipher_suite *suite;
704
if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
705
wpa_printf(MSG_DEBUG, "TLSv1: Expected Handshake; "
706
"received content type 0x%x", ct);
707
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
708
TLS_ALERT_UNEXPECTED_MESSAGE);
716
wpa_printf(MSG_DEBUG, "TLSv1: Too short ServerKeyExchange "
717
"(Left=%lu)", (unsigned long) left);
718
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
723
len = WPA_GET_BE24(pos);
728
wpa_printf(MSG_DEBUG, "TLSv1: Mismatch in ServerKeyExchange "
729
"length (len=%lu != left=%lu)",
730
(unsigned long) len, (unsigned long) left);
731
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
737
if (type == TLS_HANDSHAKE_TYPE_CERTIFICATE_REQUEST)
738
return tls_process_certificate_request(conn, ct, in_data,
740
if (type == TLS_HANDSHAKE_TYPE_SERVER_HELLO_DONE)
741
return tls_process_server_hello_done(conn, ct, in_data,
743
if (type != TLS_HANDSHAKE_TYPE_SERVER_KEY_EXCHANGE) {
744
wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
745
"message %d (expected ServerKeyExchange/"
746
"CertificateRequest/ServerHelloDone)", type);
747
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
748
TLS_ALERT_UNEXPECTED_MESSAGE);
752
wpa_printf(MSG_DEBUG, "TLSv1: Received ServerKeyExchange");
754
if (!tls_server_key_exchange_allowed(conn)) {
755
wpa_printf(MSG_DEBUG, "TLSv1: ServerKeyExchange not allowed "
756
"with the selected cipher suite");
757
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
758
TLS_ALERT_UNEXPECTED_MESSAGE);
762
wpa_hexdump(MSG_DEBUG, "TLSv1: ServerKeyExchange", pos, len);
763
suite = tls_get_cipher_suite(conn->rl.cipher_suite);
764
if (suite && suite->key_exchange == TLS_KEY_X_DH_anon) {
765
if (tlsv1_process_diffie_hellman(conn, pos, len) < 0) {
766
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
767
TLS_ALERT_DECODE_ERROR);
771
wpa_printf(MSG_DEBUG, "TLSv1: UnexpectedServerKeyExchange");
772
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
773
TLS_ALERT_UNEXPECTED_MESSAGE);
777
*in_len = end - in_data;
779
conn->state = SERVER_CERTIFICATE_REQUEST;
785
static int tls_process_certificate_request(struct tlsv1_client *conn, u8 ct,
786
const u8 *in_data, size_t *in_len)
792
if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
793
wpa_printf(MSG_DEBUG, "TLSv1: Expected Handshake; "
794
"received content type 0x%x", ct);
795
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
796
TLS_ALERT_UNEXPECTED_MESSAGE);
804
wpa_printf(MSG_DEBUG, "TLSv1: Too short CertificateRequest "
805
"(left=%lu)", (unsigned long) left);
806
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
811
len = WPA_GET_BE24(pos);
816
wpa_printf(MSG_DEBUG, "TLSv1: Mismatch in CertificateRequest "
817
"length (len=%lu != left=%lu)",
818
(unsigned long) len, (unsigned long) left);
819
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
825
if (type == TLS_HANDSHAKE_TYPE_SERVER_HELLO_DONE)
826
return tls_process_server_hello_done(conn, ct, in_data,
828
if (type != TLS_HANDSHAKE_TYPE_CERTIFICATE_REQUEST) {
829
wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
830
"message %d (expected CertificateRequest/"
831
"ServerHelloDone)", type);
832
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
833
TLS_ALERT_UNEXPECTED_MESSAGE);
837
wpa_printf(MSG_DEBUG, "TLSv1: Received CertificateRequest");
839
conn->certificate_requested = 1;
841
*in_len = end - in_data;
843
conn->state = SERVER_HELLO_DONE;
849
static int tls_process_server_hello_done(struct tlsv1_client *conn, u8 ct,
850
const u8 *in_data, size_t *in_len)
856
if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
857
wpa_printf(MSG_DEBUG, "TLSv1: Expected Handshake; "
858
"received content type 0x%x", ct);
859
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
860
TLS_ALERT_UNEXPECTED_MESSAGE);
868
wpa_printf(MSG_DEBUG, "TLSv1: Too short ServerHelloDone "
869
"(left=%lu)", (unsigned long) left);
870
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
875
len = WPA_GET_BE24(pos);
880
wpa_printf(MSG_DEBUG, "TLSv1: Mismatch in ServerHelloDone "
881
"length (len=%lu != left=%lu)",
882
(unsigned long) len, (unsigned long) left);
883
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
888
if (type != TLS_HANDSHAKE_TYPE_SERVER_HELLO_DONE) {
889
wpa_printf(MSG_DEBUG, "TLSv1: Received unexpected handshake "
890
"message %d (expected ServerHelloDone)", type);
891
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
892
TLS_ALERT_UNEXPECTED_MESSAGE);
896
wpa_printf(MSG_DEBUG, "TLSv1: Received ServerHelloDone");
898
*in_len = end - in_data;
900
conn->state = CLIENT_KEY_EXCHANGE;
906
static int tls_process_server_change_cipher_spec(struct tlsv1_client *conn,
907
u8 ct, const u8 *in_data,
913
if (ct != TLS_CONTENT_TYPE_CHANGE_CIPHER_SPEC) {
914
wpa_printf(MSG_DEBUG, "TLSv1: Expected ChangeCipherSpec; "
915
"received content type 0x%x", ct);
916
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
917
TLS_ALERT_UNEXPECTED_MESSAGE);
925
wpa_printf(MSG_DEBUG, "TLSv1: Too short ChangeCipherSpec");
926
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_DECODE_ERROR);
930
if (*pos != TLS_CHANGE_CIPHER_SPEC) {
931
wpa_printf(MSG_DEBUG, "TLSv1: Expected ChangeCipherSpec; "
932
"received data 0x%x", *pos);
933
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
934
TLS_ALERT_UNEXPECTED_MESSAGE);
938
wpa_printf(MSG_DEBUG, "TLSv1: Received ChangeCipherSpec");
939
if (tlsv1_record_change_read_cipher(&conn->rl) < 0) {
940
wpa_printf(MSG_DEBUG, "TLSv1: Failed to change read cipher "
942
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
943
TLS_ALERT_INTERNAL_ERROR);
947
*in_len = pos + 1 - in_data;
949
conn->state = SERVER_FINISHED;
955
static int tls_process_server_finished(struct tlsv1_client *conn, u8 ct,
956
const u8 *in_data, size_t *in_len)
959
size_t left, len, hlen;
960
u8 verify_data[TLS_VERIFY_DATA_LEN];
961
u8 hash[MD5_MAC_LEN + SHA1_MAC_LEN];
963
if (ct != TLS_CONTENT_TYPE_HANDSHAKE) {
964
wpa_printf(MSG_DEBUG, "TLSv1: Expected Finished; "
965
"received content type 0x%x", ct);
966
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
967
TLS_ALERT_UNEXPECTED_MESSAGE);
975
wpa_printf(MSG_DEBUG, "TLSv1: Too short record (left=%lu) for "
977
(unsigned long) left);
978
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
979
TLS_ALERT_DECODE_ERROR);
983
if (pos[0] != TLS_HANDSHAKE_TYPE_FINISHED) {
984
wpa_printf(MSG_DEBUG, "TLSv1: Expected Finished; received "
985
"type 0x%x", pos[0]);
986
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
987
TLS_ALERT_UNEXPECTED_MESSAGE);
991
len = WPA_GET_BE24(pos + 1);
997
wpa_printf(MSG_DEBUG, "TLSv1: Too short buffer for Finished "
998
"(len=%lu > left=%lu)",
999
(unsigned long) len, (unsigned long) left);
1000
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1001
TLS_ALERT_DECODE_ERROR);
1005
if (len != TLS_VERIFY_DATA_LEN) {
1006
wpa_printf(MSG_DEBUG, "TLSv1: Unexpected verify_data length "
1007
"in Finished: %lu (expected %d)",
1008
(unsigned long) len, TLS_VERIFY_DATA_LEN);
1009
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1010
TLS_ALERT_DECODE_ERROR);
1013
wpa_hexdump(MSG_MSGDUMP, "TLSv1: verify_data in Finished",
1014
pos, TLS_VERIFY_DATA_LEN);
1017
if (conn->verify_md5_server == NULL ||
1018
crypto_hash_finish(conn->verify_md5_server, hash, &hlen) < 0) {
1019
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1020
TLS_ALERT_INTERNAL_ERROR);
1021
conn->verify_md5_server = NULL;
1022
crypto_hash_finish(conn->verify_sha1_server, NULL, NULL);
1023
conn->verify_sha1_server = NULL;
1026
conn->verify_md5_server = NULL;
1027
hlen = SHA1_MAC_LEN;
1028
if (conn->verify_sha1_server == NULL ||
1029
crypto_hash_finish(conn->verify_sha1_server, hash + MD5_MAC_LEN,
1031
conn->verify_sha1_server = NULL;
1032
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1033
TLS_ALERT_INTERNAL_ERROR);
1036
conn->verify_sha1_server = NULL;
1038
if (tls_prf(conn->master_secret, TLS_MASTER_SECRET_LEN,
1039
"server finished", hash, MD5_MAC_LEN + SHA1_MAC_LEN,
1040
verify_data, TLS_VERIFY_DATA_LEN)) {
1041
wpa_printf(MSG_DEBUG, "TLSv1: Failed to derive verify_data");
1042
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1043
TLS_ALERT_DECRYPT_ERROR);
1046
wpa_hexdump_key(MSG_DEBUG, "TLSv1: verify_data (server)",
1047
verify_data, TLS_VERIFY_DATA_LEN);
1049
if (os_memcmp(pos, verify_data, TLS_VERIFY_DATA_LEN) != 0) {
1050
wpa_printf(MSG_INFO, "TLSv1: Mismatch in verify_data");
1054
wpa_printf(MSG_DEBUG, "TLSv1: Received Finished");
1056
*in_len = end - in_data;
1058
conn->state = (conn->session_resumed || conn->ticket) ?
1059
CHANGE_CIPHER_SPEC : ACK_FINISHED;
1065
static int tls_derive_pre_master_secret(u8 *pre_master_secret)
1067
WPA_PUT_BE16(pre_master_secret, TLS_VERSION);
1068
if (os_get_random(pre_master_secret + 2,
1069
TLS_PRE_MASTER_SECRET_LEN - 2))
1075
static int tls_derive_keys(struct tlsv1_client *conn,
1076
const u8 *pre_master_secret,
1077
size_t pre_master_secret_len)
1079
u8 seed[2 * TLS_RANDOM_LEN];
1080
u8 key_block[TLS_MAX_KEY_BLOCK_LEN];
1082
size_t key_block_len;
1084
if (pre_master_secret) {
1085
wpa_hexdump_key(MSG_MSGDUMP, "TLSv1: pre_master_secret",
1086
pre_master_secret, pre_master_secret_len);
1087
os_memcpy(seed, conn->client_random, TLS_RANDOM_LEN);
1088
os_memcpy(seed + TLS_RANDOM_LEN, conn->server_random,
1090
if (tls_prf(pre_master_secret, pre_master_secret_len,
1091
"master secret", seed, 2 * TLS_RANDOM_LEN,
1092
conn->master_secret, TLS_MASTER_SECRET_LEN)) {
1093
wpa_printf(MSG_DEBUG, "TLSv1: Failed to derive "
1097
wpa_hexdump_key(MSG_MSGDUMP, "TLSv1: master_secret",
1098
conn->master_secret, TLS_MASTER_SECRET_LEN);
1101
os_memcpy(seed, conn->server_random, TLS_RANDOM_LEN);
1102
os_memcpy(seed + TLS_RANDOM_LEN, conn->client_random, TLS_RANDOM_LEN);
1103
key_block_len = 2 * (conn->rl.hash_size + conn->rl.key_material_len +
1105
if (tls_prf(conn->master_secret, TLS_MASTER_SECRET_LEN,
1106
"key expansion", seed, 2 * TLS_RANDOM_LEN,
1107
key_block, key_block_len)) {
1108
wpa_printf(MSG_DEBUG, "TLSv1: Failed to derive key_block");
1111
wpa_hexdump_key(MSG_MSGDUMP, "TLSv1: key_block",
1112
key_block, key_block_len);
1116
/* client_write_MAC_secret */
1117
os_memcpy(conn->rl.write_mac_secret, pos, conn->rl.hash_size);
1118
pos += conn->rl.hash_size;
1119
/* server_write_MAC_secret */
1120
os_memcpy(conn->rl.read_mac_secret, pos, conn->rl.hash_size);
1121
pos += conn->rl.hash_size;
1123
/* client_write_key */
1124
os_memcpy(conn->rl.write_key, pos, conn->rl.key_material_len);
1125
pos += conn->rl.key_material_len;
1126
/* server_write_key */
1127
os_memcpy(conn->rl.read_key, pos, conn->rl.key_material_len);
1128
pos += conn->rl.key_material_len;
1130
/* client_write_IV */
1131
os_memcpy(conn->rl.write_iv, pos, conn->rl.iv_size);
1132
pos += conn->rl.iv_size;
1133
/* server_write_IV */
1134
os_memcpy(conn->rl.read_iv, pos, conn->rl.iv_size);
1135
pos += conn->rl.iv_size;
1141
static int tls_write_client_certificate(struct tlsv1_client *conn,
1142
u8 **msgpos, u8 *end)
1144
u8 *pos, *rhdr, *hs_start, *hs_length, *cert_start;
1146
struct x509_certificate *cert;
1150
wpa_printf(MSG_DEBUG, "TLSv1: Send Certificate");
1152
pos += TLS_RECORD_HEADER_LEN;
1154
/* opaque fragment[TLSPlaintext.length] */
1158
/* HandshakeType msg_type */
1159
*pos++ = TLS_HANDSHAKE_TYPE_CERTIFICATE;
1160
/* uint24 length (to be filled) */
1163
/* body - Certificate */
1164
/* uint24 length (to be filled) */
1167
cert = conn->client_cert;
1169
if (pos + 3 + cert->cert_len > end) {
1170
wpa_printf(MSG_DEBUG, "TLSv1: Not enough buffer space "
1171
"for Certificate (cert_len=%lu left=%lu)",
1172
(unsigned long) cert->cert_len,
1173
(unsigned long) (end - pos));
1174
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1175
TLS_ALERT_INTERNAL_ERROR);
1178
WPA_PUT_BE24(pos, cert->cert_len);
1180
os_memcpy(pos, cert->cert_start, cert->cert_len);
1181
pos += cert->cert_len;
1183
if (x509_certificate_self_signed(cert))
1185
cert = x509_certificate_get_subject(conn->trusted_certs,
1188
if (cert == conn->client_cert || cert == NULL) {
1190
* Client was not configured with all the needed certificates
1191
* to form a full certificate chain. The server may fail to
1192
* validate the chain unless it is configured with all the
1193
* missing CA certificates.
1195
wpa_printf(MSG_DEBUG, "TLSv1: Full client certificate chain "
1196
"not configured - validation may fail");
1198
WPA_PUT_BE24(cert_start, pos - cert_start - 3);
1200
WPA_PUT_BE24(hs_length, pos - hs_length - 3);
1202
if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
1203
rhdr, end - rhdr, pos - hs_start, &rlen) < 0) {
1204
wpa_printf(MSG_DEBUG, "TLSv1: Failed to generate a record");
1205
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1206
TLS_ALERT_INTERNAL_ERROR);
1211
tls_verify_hash_add(conn, hs_start, pos - hs_start);
1219
static int tlsv1_key_x_anon_dh(struct tlsv1_client *conn, u8 **pos, u8 *end)
1222
/* ClientDiffieHellmanPublic */
1223
u8 *csecret, *csecret_start, *dh_yc, *shared;
1224
size_t csecret_len, dh_yc_len, shared_len;
1226
csecret_len = conn->dh_p_len;
1227
csecret = os_malloc(csecret_len);
1228
if (csecret == NULL) {
1229
wpa_printf(MSG_DEBUG, "TLSv1: Failed to allocate "
1230
"memory for Yc (Diffie-Hellman)");
1231
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1232
TLS_ALERT_INTERNAL_ERROR);
1235
if (os_get_random(csecret, csecret_len)) {
1236
wpa_printf(MSG_DEBUG, "TLSv1: Failed to get random "
1237
"data for Diffie-Hellman");
1238
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1239
TLS_ALERT_INTERNAL_ERROR);
1244
if (os_memcmp(csecret, conn->dh_p, csecret_len) > 0)
1245
csecret[0] = 0; /* make sure Yc < p */
1247
csecret_start = csecret;
1248
while (csecret_len > 1 && *csecret_start == 0) {
1252
wpa_hexdump_key(MSG_DEBUG, "TLSv1: DH client's secret value",
1253
csecret_start, csecret_len);
1255
/* Yc = g^csecret mod p */
1256
dh_yc_len = conn->dh_p_len;
1257
dh_yc = os_malloc(dh_yc_len);
1258
if (dh_yc == NULL) {
1259
wpa_printf(MSG_DEBUG, "TLSv1: Failed to allocate "
1260
"memory for Diffie-Hellman");
1261
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1262
TLS_ALERT_INTERNAL_ERROR);
1266
crypto_mod_exp(conn->dh_g, conn->dh_g_len,
1267
csecret_start, csecret_len,
1268
conn->dh_p, conn->dh_p_len,
1271
wpa_hexdump(MSG_DEBUG, "TLSv1: DH Yc (client's public value)",
1274
WPA_PUT_BE16(*pos, dh_yc_len);
1276
if (*pos + dh_yc_len > end) {
1277
wpa_printf(MSG_DEBUG, "TLSv1: Not enough room in the "
1278
"message buffer for Yc");
1279
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1280
TLS_ALERT_INTERNAL_ERROR);
1285
os_memcpy(*pos, dh_yc, dh_yc_len);
1289
shared_len = conn->dh_p_len;
1290
shared = os_malloc(shared_len);
1291
if (shared == NULL) {
1292
wpa_printf(MSG_DEBUG, "TLSv1: Could not allocate memory for "
1294
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1295
TLS_ALERT_INTERNAL_ERROR);
1300
/* shared = Ys^csecret mod p */
1301
crypto_mod_exp(conn->dh_ys, conn->dh_ys_len,
1302
csecret_start, csecret_len,
1303
conn->dh_p, conn->dh_p_len,
1304
shared, &shared_len);
1305
wpa_hexdump_key(MSG_DEBUG, "TLSv1: Shared secret from DH key exchange",
1306
shared, shared_len);
1308
os_memset(csecret_start, 0, csecret_len);
1310
if (tls_derive_keys(conn, shared, shared_len)) {
1311
wpa_printf(MSG_DEBUG, "TLSv1: Failed to derive keys");
1312
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1313
TLS_ALERT_INTERNAL_ERROR);
1317
os_memset(shared, 0, shared_len);
1319
tlsv1_client_free_dh(conn);
1321
#else /* EAP_FAST */
1322
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, TLS_ALERT_INTERNAL_ERROR);
1324
#endif /* EAP_FAST */
1328
static int tlsv1_key_x_rsa(struct tlsv1_client *conn, u8 **pos, u8 *end)
1330
u8 pre_master_secret[TLS_PRE_MASTER_SECRET_LEN];
1334
if (tls_derive_pre_master_secret(pre_master_secret) < 0 ||
1335
tls_derive_keys(conn, pre_master_secret,
1336
TLS_PRE_MASTER_SECRET_LEN)) {
1337
wpa_printf(MSG_DEBUG, "TLSv1: Failed to derive keys");
1338
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1339
TLS_ALERT_INTERNAL_ERROR);
1343
/* EncryptedPreMasterSecret */
1344
if (conn->server_rsa_key == NULL) {
1345
wpa_printf(MSG_DEBUG, "TLSv1: No server RSA key to "
1346
"use for encrypting pre-master secret");
1347
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1348
TLS_ALERT_INTERNAL_ERROR);
1352
/* RSA encrypted value is encoded with PKCS #1 v1.5 block type 2. */
1355
res = crypto_public_key_encrypt_pkcs1_v15(
1356
conn->server_rsa_key,
1357
pre_master_secret, TLS_PRE_MASTER_SECRET_LEN,
1359
os_memset(pre_master_secret, 0, TLS_PRE_MASTER_SECRET_LEN);
1361
wpa_printf(MSG_DEBUG, "TLSv1: RSA encryption failed");
1362
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1363
TLS_ALERT_INTERNAL_ERROR);
1366
WPA_PUT_BE16(*pos - 2, clen);
1367
wpa_hexdump(MSG_MSGDUMP, "TLSv1: Encrypted pre_master_secret",
1375
static int tls_write_client_key_exchange(struct tlsv1_client *conn,
1376
u8 **msgpos, u8 *end)
1378
u8 *pos, *rhdr, *hs_start, *hs_length;
1380
tls_key_exchange keyx;
1381
const struct tls_cipher_suite *suite;
1383
suite = tls_get_cipher_suite(conn->rl.cipher_suite);
1385
keyx = TLS_KEY_X_NULL;
1387
keyx = suite->key_exchange;
1391
wpa_printf(MSG_DEBUG, "TLSv1: Send ClientKeyExchange");
1394
pos += TLS_RECORD_HEADER_LEN;
1396
/* opaque fragment[TLSPlaintext.length] */
1400
/* HandshakeType msg_type */
1401
*pos++ = TLS_HANDSHAKE_TYPE_CLIENT_KEY_EXCHANGE;
1402
/* uint24 length (to be filled) */
1405
/* body - ClientKeyExchange */
1406
if (keyx == TLS_KEY_X_DH_anon) {
1407
if (tlsv1_key_x_anon_dh(conn, &pos, end) < 0)
1410
if (tlsv1_key_x_rsa(conn, &pos, end) < 0)
1414
WPA_PUT_BE24(hs_length, pos - hs_length - 3);
1416
if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
1417
rhdr, end - rhdr, pos - hs_start, &rlen) < 0) {
1418
wpa_printf(MSG_DEBUG, "TLSv1: Failed to create a record");
1419
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1420
TLS_ALERT_INTERNAL_ERROR);
1424
tls_verify_hash_add(conn, hs_start, pos - hs_start);
1432
static int tls_write_client_certificate_verify(struct tlsv1_client *conn,
1433
u8 **msgpos, u8 *end)
1435
u8 *pos, *rhdr, *hs_start, *hs_length, *signed_start;
1436
size_t rlen, hlen, clen;
1437
u8 hash[MD5_MAC_LEN + SHA1_MAC_LEN], *hpos;
1438
enum { SIGN_ALG_RSA, SIGN_ALG_DSA } alg = SIGN_ALG_RSA;
1442
wpa_printf(MSG_DEBUG, "TLSv1: Send CertificateVerify");
1444
pos += TLS_RECORD_HEADER_LEN;
1448
/* HandshakeType msg_type */
1449
*pos++ = TLS_HANDSHAKE_TYPE_CERTIFICATE_VERIFY;
1450
/* uint24 length (to be filled) */
1455
* RFC 2246: 7.4.3 and 7.4.8:
1456
* Signature signature
1459
* digitally-signed struct {
1460
* opaque md5_hash[16];
1461
* opaque sha_hash[20];
1465
* digitally-signed struct {
1466
* opaque sha_hash[20];
1469
* The hash values are calculated over all handshake messages sent or
1470
* received starting at ClientHello up to, but not including, this
1471
* CertificateVerify message, including the type and length fields of
1472
* the handshake messages.
1477
if (alg == SIGN_ALG_RSA) {
1479
if (conn->verify_md5_cert == NULL ||
1480
crypto_hash_finish(conn->verify_md5_cert, hpos, &hlen) < 0)
1482
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1483
TLS_ALERT_INTERNAL_ERROR);
1484
conn->verify_md5_cert = NULL;
1485
crypto_hash_finish(conn->verify_sha1_cert, NULL, NULL);
1486
conn->verify_sha1_cert = NULL;
1489
hpos += MD5_MAC_LEN;
1491
crypto_hash_finish(conn->verify_md5_cert, NULL, NULL);
1493
conn->verify_md5_cert = NULL;
1494
hlen = SHA1_MAC_LEN;
1495
if (conn->verify_sha1_cert == NULL ||
1496
crypto_hash_finish(conn->verify_sha1_cert, hpos, &hlen) < 0) {
1497
conn->verify_sha1_cert = NULL;
1498
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1499
TLS_ALERT_INTERNAL_ERROR);
1502
conn->verify_sha1_cert = NULL;
1504
if (alg == SIGN_ALG_RSA)
1505
hlen += MD5_MAC_LEN;
1507
wpa_hexdump(MSG_MSGDUMP, "TLSv1: CertificateVerify hash", hash, hlen);
1511
* In digital signing, one-way hash functions are used as input for a
1512
* signing algorithm. A digitally-signed element is encoded as an
1513
* opaque vector <0..2^16-1>, where the length is specified by the
1514
* signing algorithm and key.
1516
* In RSA signing, a 36-byte structure of two hashes (one SHA and one
1517
* MD5) is signed (encrypted with the private key). It is encoded with
1518
* PKCS #1 block type 0 or type 1 as described in [PKCS1].
1520
signed_start = pos; /* length to be filled */
1523
if (crypto_private_key_sign_pkcs1(conn->client_key, hash, hlen,
1525
wpa_printf(MSG_DEBUG, "TLSv1: Failed to sign hash (PKCS #1)");
1526
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1527
TLS_ALERT_INTERNAL_ERROR);
1530
WPA_PUT_BE16(signed_start, clen);
1534
WPA_PUT_BE24(hs_length, pos - hs_length - 3);
1536
if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
1537
rhdr, end - rhdr, pos - hs_start, &rlen) < 0) {
1538
wpa_printf(MSG_DEBUG, "TLSv1: Failed to generate a record");
1539
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1540
TLS_ALERT_INTERNAL_ERROR);
1545
tls_verify_hash_add(conn, hs_start, pos - hs_start);
1553
static int tls_write_client_change_cipher_spec(struct tlsv1_client *conn,
1554
u8 **msgpos, u8 *end)
1561
wpa_printf(MSG_DEBUG, "TLSv1: Send ChangeCipherSpec");
1563
pos += TLS_RECORD_HEADER_LEN;
1564
*pos = TLS_CHANGE_CIPHER_SPEC;
1565
if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_CHANGE_CIPHER_SPEC,
1566
rhdr, end - rhdr, 1, &rlen) < 0) {
1567
wpa_printf(MSG_DEBUG, "TLSv1: Failed to create a record");
1568
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1569
TLS_ALERT_INTERNAL_ERROR);
1573
if (tlsv1_record_change_write_cipher(&conn->rl) < 0) {
1574
wpa_printf(MSG_DEBUG, "TLSv1: Failed to set write cipher for "
1576
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1577
TLS_ALERT_INTERNAL_ERROR);
1581
*msgpos = rhdr + rlen;
1587
static int tls_write_client_finished(struct tlsv1_client *conn,
1588
u8 **msgpos, u8 *end)
1590
u8 *pos, *rhdr, *hs_start, *hs_length;
1592
u8 verify_data[TLS_VERIFY_DATA_LEN];
1593
u8 hash[MD5_MAC_LEN + SHA1_MAC_LEN];
1597
wpa_printf(MSG_DEBUG, "TLSv1: Send Finished");
1599
/* Encrypted Handshake Message: Finished */
1602
if (conn->verify_md5_client == NULL ||
1603
crypto_hash_finish(conn->verify_md5_client, hash, &hlen) < 0) {
1604
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1605
TLS_ALERT_INTERNAL_ERROR);
1606
conn->verify_md5_client = NULL;
1607
crypto_hash_finish(conn->verify_sha1_client, NULL, NULL);
1608
conn->verify_sha1_client = NULL;
1611
conn->verify_md5_client = NULL;
1612
hlen = SHA1_MAC_LEN;
1613
if (conn->verify_sha1_client == NULL ||
1614
crypto_hash_finish(conn->verify_sha1_client, hash + MD5_MAC_LEN,
1616
conn->verify_sha1_client = NULL;
1617
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1618
TLS_ALERT_INTERNAL_ERROR);
1621
conn->verify_sha1_client = NULL;
1623
if (tls_prf(conn->master_secret, TLS_MASTER_SECRET_LEN,
1624
"client finished", hash, MD5_MAC_LEN + SHA1_MAC_LEN,
1625
verify_data, TLS_VERIFY_DATA_LEN)) {
1626
wpa_printf(MSG_DEBUG, "TLSv1: Failed to generate verify_data");
1627
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1628
TLS_ALERT_INTERNAL_ERROR);
1631
wpa_hexdump_key(MSG_DEBUG, "TLSv1: verify_data (client)",
1632
verify_data, TLS_VERIFY_DATA_LEN);
1635
pos += TLS_RECORD_HEADER_LEN;
1638
/* HandshakeType msg_type */
1639
*pos++ = TLS_HANDSHAKE_TYPE_FINISHED;
1640
/* uint24 length (to be filled) */
1643
os_memcpy(pos, verify_data, TLS_VERIFY_DATA_LEN);
1644
pos += TLS_VERIFY_DATA_LEN;
1645
WPA_PUT_BE24(hs_length, pos - hs_length - 3);
1646
tls_verify_hash_add(conn, hs_start, pos - hs_start);
1648
if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_HANDSHAKE,
1649
rhdr, end - rhdr, pos - hs_start, &rlen) < 0) {
1650
wpa_printf(MSG_DEBUG, "TLSv1: Failed to create a record");
1651
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1652
TLS_ALERT_INTERNAL_ERROR);
1664
static size_t tls_client_cert_chain_der_len(struct tlsv1_client *conn)
1667
struct x509_certificate *cert;
1669
cert = conn->client_cert;
1671
len += 3 + cert->cert_len;
1672
if (x509_certificate_self_signed(cert))
1674
cert = x509_certificate_get_subject(conn->trusted_certs,
1682
static u8 * tls_send_client_key_exchange(struct tlsv1_client *conn,
1685
u8 *msg, *end, *pos;
1691
if (conn->certificate_requested)
1692
msglen += tls_client_cert_chain_der_len(conn);
1694
msg = os_malloc(msglen);
1701
if (conn->certificate_requested) {
1702
if (tls_write_client_certificate(conn, &pos, end) < 0) {
1708
if (tls_write_client_key_exchange(conn, &pos, end) < 0 ||
1709
(conn->certificate_requested && conn->client_key &&
1710
tls_write_client_certificate_verify(conn, &pos, end) < 0) ||
1711
tls_write_client_change_cipher_spec(conn, &pos, end) < 0 ||
1712
tls_write_client_finished(conn, &pos, end) < 0) {
1717
*out_len = pos - msg;
1719
conn->state = SERVER_CHANGE_CIPHER_SPEC;
1725
static u8 * tls_send_change_cipher_spec(struct tlsv1_client *conn,
1728
u8 *msg, *end, *pos;
1732
msg = os_malloc(1000);
1739
if (tls_write_client_change_cipher_spec(conn, &pos, end) < 0 ||
1740
tls_write_client_finished(conn, &pos, end) < 0) {
1745
*out_len = pos - msg;
1747
wpa_printf(MSG_DEBUG, "TLSv1: Session resumption completed "
1749
conn->state = ESTABLISHED;
1755
static int tlsv1_client_process_handshake(struct tlsv1_client *conn, u8 ct,
1756
const u8 *buf, size_t *len)
1758
if (ct == TLS_CONTENT_TYPE_HANDSHAKE && *len >= 4 &&
1759
buf[0] == TLS_HANDSHAKE_TYPE_HELLO_REQUEST) {
1760
size_t hr_len = WPA_GET_BE24(buf + 1);
1761
if (hr_len > *len - 4) {
1762
wpa_printf(MSG_DEBUG, "TLSv1: HelloRequest underflow");
1763
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1764
TLS_ALERT_DECODE_ERROR);
1767
wpa_printf(MSG_DEBUG, "TLSv1: Ignored HelloRequest");
1772
switch (conn->state) {
1774
if (tls_process_server_hello(conn, ct, buf, len))
1777
case SERVER_CERTIFICATE:
1778
if (tls_process_certificate(conn, ct, buf, len))
1781
case SERVER_KEY_EXCHANGE:
1782
if (tls_process_server_key_exchange(conn, ct, buf, len))
1785
case SERVER_CERTIFICATE_REQUEST:
1786
if (tls_process_certificate_request(conn, ct, buf, len))
1789
case SERVER_HELLO_DONE:
1790
if (tls_process_server_hello_done(conn, ct, buf, len))
1793
case SERVER_CHANGE_CIPHER_SPEC:
1794
if (tls_process_server_change_cipher_spec(conn, ct, buf, len))
1797
case SERVER_FINISHED:
1798
if (tls_process_server_finished(conn, ct, buf, len))
1802
wpa_printf(MSG_DEBUG, "TLSv1: Unexpected state %d "
1803
"while processing received message",
1808
if (ct == TLS_CONTENT_TYPE_HANDSHAKE)
1809
tls_verify_hash_add(conn, buf, *len);
1816
* tlsv1_client_handshake - Process TLS handshake
1817
* @conn: TLSv1 client connection data from tlsv1_client_init()
1818
* @in_data: Input data from TLS peer
1819
* @in_len: Input data length
1820
* @out_len: Length of the output buffer.
1821
* Returns: Pointer to output data, %NULL on failure
1823
u8 * tlsv1_client_handshake(struct tlsv1_client *conn,
1824
const u8 *in_data, size_t in_len,
1827
const u8 *pos, *end;
1828
u8 *msg = NULL, *in_msg, *in_pos, *in_end, alert, ct;
1831
if (conn->state == CLIENT_HELLO) {
1834
return tls_send_client_hello(conn, out_len);
1837
if (in_data == NULL || in_len == 0)
1841
end = in_data + in_len;
1842
in_msg = os_malloc(in_len);
1846
/* Each received packet may include multiple records */
1848
in_msg_len = in_len;
1849
if (tlsv1_record_receive(&conn->rl, pos, end - pos,
1850
in_msg, &in_msg_len, &alert)) {
1851
wpa_printf(MSG_DEBUG, "TLSv1: Processing received "
1853
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, alert);
1859
in_end = in_msg + in_msg_len;
1861
/* Each received record may include multiple messages of the
1862
* same ContentType. */
1863
while (in_pos < in_end) {
1864
in_msg_len = in_end - in_pos;
1865
if (tlsv1_client_process_handshake(conn, ct, in_pos,
1868
in_pos += in_msg_len;
1871
pos += TLS_RECORD_HEADER_LEN + WPA_GET_BE16(pos + 3);
1877
switch (conn->state) {
1878
case CLIENT_KEY_EXCHANGE:
1879
msg = tls_send_client_key_exchange(conn, out_len);
1881
case CHANGE_CIPHER_SPEC:
1882
msg = tls_send_change_cipher_spec(conn, out_len);
1885
wpa_printf(MSG_DEBUG, "TLSv1: Handshake completed "
1887
conn->state = ESTABLISHED;
1888
/* Need to return something to get final TLS ACK. */
1893
wpa_printf(MSG_DEBUG, "TLSv1: Unexpected state %d while "
1894
"generating reply", conn->state);
1900
if (conn->alert_level) {
1901
conn->state = FAILED;
1903
msg = tls_send_alert(conn, conn->alert_level,
1904
conn->alert_description, out_len);
1912
* tlsv1_client_encrypt - Encrypt data into TLS tunnel
1913
* @conn: TLSv1 client connection data from tlsv1_client_init()
1914
* @in_data: Pointer to plaintext data to be encrypted
1915
* @in_len: Input buffer length
1916
* @out_data: Pointer to output buffer (encrypted TLS data)
1917
* @out_len: Maximum out_data length
1918
* Returns: Number of bytes written to out_data, -1 on failure
1920
* This function is used after TLS handshake has been completed successfully to
1921
* send data in the encrypted tunnel.
1923
int tlsv1_client_encrypt(struct tlsv1_client *conn,
1924
const u8 *in_data, size_t in_len,
1925
u8 *out_data, size_t out_len)
1929
wpa_hexdump_key(MSG_MSGDUMP, "TLSv1: Plaintext AppData",
1932
os_memcpy(out_data + TLS_RECORD_HEADER_LEN, in_data, in_len);
1934
if (tlsv1_record_send(&conn->rl, TLS_CONTENT_TYPE_APPLICATION_DATA,
1935
out_data, out_len, in_len, &rlen) < 0) {
1936
wpa_printf(MSG_DEBUG, "TLSv1: Failed to create a record");
1937
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1938
TLS_ALERT_INTERNAL_ERROR);
1947
* tlsv1_client_decrypt - Decrypt data from TLS tunnel
1948
* @conn: TLSv1 client connection data from tlsv1_client_init()
1949
* @in_data: Pointer to input buffer (encrypted TLS data)
1950
* @in_len: Input buffer length
1951
* @out_data: Pointer to output buffer (decrypted data from TLS tunnel)
1952
* @out_len: Maximum out_data length
1953
* Returns: Number of bytes written to out_data, -1 on failure
1955
* This function is used after TLS handshake has been completed successfully to
1956
* receive data from the encrypted tunnel.
1958
int tlsv1_client_decrypt(struct tlsv1_client *conn,
1959
const u8 *in_data, size_t in_len,
1960
u8 *out_data, size_t out_len)
1962
const u8 *in_end, *pos;
1964
u8 alert, *out_end, *out_pos;
1968
in_end = in_data + in_len;
1970
out_end = out_data + out_len;
1972
while (pos < in_end) {
1973
if (pos[0] != TLS_CONTENT_TYPE_APPLICATION_DATA) {
1974
wpa_printf(MSG_DEBUG, "TLSv1: Unexpected content type "
1976
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1977
TLS_ALERT_UNEXPECTED_MESSAGE);
1981
olen = out_end - out_pos;
1982
res = tlsv1_record_receive(&conn->rl, pos, in_end - pos,
1983
out_pos, &olen, &alert);
1985
wpa_printf(MSG_DEBUG, "TLSv1: Record layer processing "
1987
tls_alert(conn, TLS_ALERT_LEVEL_FATAL, alert);
1991
if (out_pos > out_end) {
1992
wpa_printf(MSG_DEBUG, "TLSv1: Buffer not large enough "
1993
"for processing the received record");
1994
tls_alert(conn, TLS_ALERT_LEVEL_FATAL,
1995
TLS_ALERT_INTERNAL_ERROR);
1999
pos += TLS_RECORD_HEADER_LEN + WPA_GET_BE16(pos + 3);
2002
return out_pos - out_data;
2007
* tlsv1_client_global_init - Initialize TLSv1 client
2008
* Returns: 0 on success, -1 on failure
2010
* This function must be called before using any other TLSv1 client functions.
2012
int tlsv1_client_global_init(void)
2014
return crypto_global_init();
2019
* tlsv1_client_global_deinit - Deinitialize TLSv1 client
2021
* This function can be used to deinitialize the TLSv1 client that was
2022
* initialized by calling tlsv1_client_global_init(). No TLSv1 client functions
2023
* can be called after this before calling tlsv1_client_global_init() again.
2025
void tlsv1_client_global_deinit(void)
2027
crypto_global_deinit();
2031
static void tlsv1_client_free_verify_hashes(struct tlsv1_client *conn)
2033
crypto_hash_finish(conn->verify_md5_client, NULL, NULL);
2034
crypto_hash_finish(conn->verify_md5_server, NULL, NULL);
2035
crypto_hash_finish(conn->verify_md5_cert, NULL, NULL);
2036
crypto_hash_finish(conn->verify_sha1_client, NULL, NULL);
2037
crypto_hash_finish(conn->verify_sha1_server, NULL, NULL);
2038
crypto_hash_finish(conn->verify_sha1_cert, NULL, NULL);
2039
conn->verify_md5_client = NULL;
2040
conn->verify_md5_server = NULL;
2041
conn->verify_md5_cert = NULL;
2042
conn->verify_sha1_client = NULL;
2043
conn->verify_sha1_server = NULL;
2044
conn->verify_sha1_cert = NULL;
2048
static int tlsv1_client_init_verify_hashes(struct tlsv1_client *conn)
2050
conn->verify_md5_client = crypto_hash_init(CRYPTO_HASH_ALG_MD5, NULL,
2052
conn->verify_md5_server = crypto_hash_init(CRYPTO_HASH_ALG_MD5, NULL,
2054
conn->verify_md5_cert = crypto_hash_init(CRYPTO_HASH_ALG_MD5, NULL, 0);
2055
conn->verify_sha1_client = crypto_hash_init(CRYPTO_HASH_ALG_SHA1, NULL,
2057
conn->verify_sha1_server = crypto_hash_init(CRYPTO_HASH_ALG_SHA1, NULL,
2059
conn->verify_sha1_cert = crypto_hash_init(CRYPTO_HASH_ALG_SHA1, NULL,
2061
if (conn->verify_md5_client == NULL ||
2062
conn->verify_md5_server == NULL ||
2063
conn->verify_md5_cert == NULL ||
2064
conn->verify_sha1_client == NULL ||
2065
conn->verify_sha1_server == NULL ||
2066
conn->verify_sha1_cert == NULL) {
2067
tlsv1_client_free_verify_hashes(conn);
2075
* tlsv1_client_init - Initialize TLSv1 client connection
2076
* Returns: Pointer to TLSv1 client connection data or %NULL on failure
2078
struct tlsv1_client * tlsv1_client_init(void)
2080
struct tlsv1_client *conn;
2084
conn = os_zalloc(sizeof(*conn));
2088
conn->state = CLIENT_HELLO;
2090
if (tlsv1_client_init_verify_hashes(conn) < 0) {
2091
wpa_printf(MSG_DEBUG, "TLSv1: Failed to initialize verify "
2098
suites = conn->cipher_suites;
2099
#ifndef CONFIG_CRYPTO_INTERNAL
2100
suites[count++] = TLS_RSA_WITH_AES_256_CBC_SHA;
2101
#endif /* CONFIG_CRYPTO_INTERNAL */
2102
suites[count++] = TLS_RSA_WITH_AES_128_CBC_SHA;
2103
suites[count++] = TLS_RSA_WITH_3DES_EDE_CBC_SHA;
2104
suites[count++] = TLS_RSA_WITH_RC4_128_SHA;
2105
suites[count++] = TLS_RSA_WITH_RC4_128_MD5;
2106
conn->num_cipher_suites = count;
2113
* tlsv1_client_deinit - Deinitialize TLSv1 client connection
2114
* @conn: TLSv1 client connection data from tlsv1_client_init()
2116
void tlsv1_client_deinit(struct tlsv1_client *conn)
2118
crypto_public_key_free(conn->server_rsa_key);
2119
tlsv1_record_set_cipher_suite(&conn->rl, TLS_NULL_WITH_NULL_NULL);
2120
tlsv1_record_change_write_cipher(&conn->rl);
2121
tlsv1_record_change_read_cipher(&conn->rl);
2122
tlsv1_client_free_verify_hashes(conn);
2123
os_free(conn->client_hello_ext);
2124
tlsv1_client_free_dh(conn);
2125
x509_certificate_chain_free(conn->trusted_certs);
2126
x509_certificate_chain_free(conn->client_cert);
2127
crypto_private_key_free(conn->client_key);
2133
* tlsv1_client_established - Check whether connection has been established
2134
* @conn: TLSv1 client connection data from tlsv1_client_init()
2135
* Returns: 1 if connection is established, 0 if not
2137
int tlsv1_client_established(struct tlsv1_client *conn)
2139
return conn->state == ESTABLISHED;
2144
* tlsv1_client_prf - Use TLS-PRF to derive keying material
2145
* @conn: TLSv1 client connection data from tlsv1_client_init()
2146
* @label: Label (e.g., description of the key) for PRF
2147
* @server_random_first: seed is 0 = client_random|server_random,
2148
* 1 = server_random|client_random
2149
* @out: Buffer for output data from TLS-PRF
2150
* @out_len: Length of the output buffer
2151
* Returns: 0 on success, -1 on failure
2153
int tlsv1_client_prf(struct tlsv1_client *conn, const char *label,
2154
int server_random_first, u8 *out, size_t out_len)
2156
u8 seed[2 * TLS_RANDOM_LEN];
2158
if (conn->state != ESTABLISHED)
2161
if (server_random_first) {
2162
os_memcpy(seed, conn->server_random, TLS_RANDOM_LEN);
2163
os_memcpy(seed + TLS_RANDOM_LEN, conn->client_random,
2166
os_memcpy(seed, conn->client_random, TLS_RANDOM_LEN);
2167
os_memcpy(seed + TLS_RANDOM_LEN, conn->server_random,
2171
return tls_prf(conn->master_secret, TLS_MASTER_SECRET_LEN,
2172
label, seed, 2 * TLS_RANDOM_LEN, out, out_len);
2177
* tlsv1_client_get_cipher - Get current cipher name
2178
* @conn: TLSv1 client connection data from tlsv1_client_init()
2179
* @buf: Buffer for the cipher name
2181
* Returns: 0 on success, -1 on failure
2183
* Get the name of the currently used cipher.
2185
int tlsv1_client_get_cipher(struct tlsv1_client *conn, char *buf,
2190
switch (conn->rl.cipher_suite) {
2191
case TLS_RSA_WITH_RC4_128_MD5:
2194
case TLS_RSA_WITH_RC4_128_SHA:
2197
case TLS_RSA_WITH_DES_CBC_SHA:
2198
cipher = "DES-CBC-SHA";
2200
case TLS_RSA_WITH_3DES_EDE_CBC_SHA:
2201
cipher = "DES-CBC3-SHA";
2207
os_snprintf(buf, buflen, "%s", cipher);
2213
* tlsv1_client_shutdown - Shutdown TLS connection
2214
* @conn: TLSv1 client connection data from tlsv1_client_init()
2215
* Returns: 0 on success, -1 on failure
2217
int tlsv1_client_shutdown(struct tlsv1_client *conn)
2219
conn->state = CLIENT_HELLO;
2221
tlsv1_client_free_verify_hashes(conn);
2222
if (tlsv1_client_init_verify_hashes(conn) < 0) {
2223
wpa_printf(MSG_DEBUG, "TLSv1: Failed to re-initialize verify "
2228
tlsv1_record_set_cipher_suite(&conn->rl, TLS_NULL_WITH_NULL_NULL);
2229
tlsv1_record_change_write_cipher(&conn->rl);
2230
tlsv1_record_change_read_cipher(&conn->rl);
2232
conn->certificate_requested = 0;
2233
crypto_public_key_free(conn->server_rsa_key);
2234
conn->server_rsa_key = NULL;
2235
conn->session_resumed = 0;
2242
* tlsv1_client_resumed - Was session resumption used
2243
* @conn: TLSv1 client connection data from tlsv1_client_init()
2244
* Returns: 1 if current session used session resumption, 0 if not
2246
int tlsv1_client_resumed(struct tlsv1_client *conn)
2248
return !!conn->session_resumed;
2253
* tlsv1_client_hello_ext - Set TLS extension for ClientHello
2254
* @conn: TLSv1 client connection data from tlsv1_client_init()
2255
* @ext_type: Extension type
2256
* @data: Extension payload (%NULL to remove extension)
2257
* @data_len: Extension payload length
2258
* Returns: 0 on success, -1 on failure
2260
int tlsv1_client_hello_ext(struct tlsv1_client *conn, int ext_type,
2261
const u8 *data, size_t data_len)
2266
os_free(conn->client_hello_ext);
2267
conn->client_hello_ext = NULL;
2268
conn->client_hello_ext_len = 0;
2270
if (data == NULL || data_len == 0)
2273
pos = conn->client_hello_ext = os_malloc(6 + data_len);
2277
WPA_PUT_BE16(pos, 4 + data_len);
2279
WPA_PUT_BE16(pos, ext_type);
2281
WPA_PUT_BE16(pos, data_len);
2283
os_memcpy(pos, data, data_len);
2284
conn->client_hello_ext_len = 6 + data_len;
2286
if (ext_type == TLS_EXT_PAC_OPAQUE) {
2288
wpa_printf(MSG_DEBUG, "TLSv1: Using session ticket");
2296
* tlsv1_client_get_keys - Get master key and random data from TLS connection
2297
* @conn: TLSv1 client connection data from tlsv1_client_init()
2298
* @keys: Structure of key/random data (filled on success)
2299
* Returns: 0 on success, -1 on failure
2301
int tlsv1_client_get_keys(struct tlsv1_client *conn, struct tls_keys *keys)
2303
os_memset(keys, 0, sizeof(*keys));
2304
if (conn->state == CLIENT_HELLO)
2307
keys->client_random = conn->client_random;
2308
keys->client_random_len = TLS_RANDOM_LEN;
2310
if (conn->state != SERVER_HELLO) {
2311
keys->server_random = conn->server_random;
2312
keys->server_random_len = TLS_RANDOM_LEN;
2313
keys->master_key = conn->master_secret;
2314
keys->master_key_len = TLS_MASTER_SECRET_LEN;
2322
* tlsv1_client_set_master_key - Configure master secret for TLS connection
2323
* @conn: TLSv1 client connection data from tlsv1_client_init()
2324
* @key: TLS pre-master-secret
2325
* @key_len: length of key in bytes
2326
* Returns: 0 on success, -1 on failure
2328
int tlsv1_client_set_master_key(struct tlsv1_client *conn,
2329
const u8 *key, size_t key_len)
2331
if (key_len > TLS_MASTER_SECRET_LEN)
2333
wpa_hexdump_key(MSG_MSGDUMP, "TLSv1: master_secret from session "
2334
"ticket", key, key_len);
2335
os_memcpy(conn->master_secret, key, key_len);
2336
conn->ticket_key = 1;
2343
* tlsv1_client_get_keyblock_size - Get TLS key_block size
2344
* @conn: TLSv1 client connection data from tlsv1_client_init()
2345
* Returns: Size of the key_block for the negotiated cipher suite or -1 on
2348
int tlsv1_client_get_keyblock_size(struct tlsv1_client *conn)
2350
if (conn->state == CLIENT_HELLO || conn->state == SERVER_HELLO)
2353
return 2 * (conn->rl.hash_size + conn->rl.key_material_len +
2359
* tlsv1_client_set_cipher_list - Configure acceptable cipher suites
2360
* @conn: TLSv1 client connection data from tlsv1_client_init()
2361
* @ciphers: Zero (TLS_CIPHER_NONE) terminated list of allowed ciphers
2363
* Returns: 0 on success, -1 on failure
2365
int tlsv1_client_set_cipher_list(struct tlsv1_client *conn, u8 *ciphers)
2371
/* TODO: implement proper configuration of cipher suites */
2372
if (ciphers[0] == TLS_CIPHER_ANON_DH_AES128_SHA) {
2374
suites = conn->cipher_suites;
2375
suites[count++] = TLS_DH_anon_WITH_AES_256_CBC_SHA;
2376
suites[count++] = TLS_DH_anon_WITH_AES_128_CBC_SHA;
2377
suites[count++] = TLS_DH_anon_WITH_3DES_EDE_CBC_SHA;
2378
suites[count++] = TLS_DH_anon_WITH_RC4_128_MD5;
2379
suites[count++] = TLS_DH_anon_WITH_DES_CBC_SHA;
2380
conn->num_cipher_suites = count;
2384
#else /* EAP_FAST */
2386
#endif /* EAP_FAST */
2390
static int tlsv1_client_add_cert_der(struct x509_certificate **chain,
2391
const u8 *buf, size_t len)
2393
struct x509_certificate *cert;
2396
cert = x509_certificate_parse(buf, len);
2398
wpa_printf(MSG_INFO, "TLSv1: %s - failed to parse certificate",
2403
cert->next = *chain;
2406
x509_name_string(&cert->subject, name, sizeof(name));
2407
wpa_printf(MSG_DEBUG, "TLSv1: Added certificate: %s", name);
2413
static const char *pem_cert_begin = "-----BEGIN CERTIFICATE-----";
2414
static const char *pem_cert_end = "-----END CERTIFICATE-----";
2417
static const u8 * search_tag(const char *tag, const u8 *buf, size_t len)
2421
plen = os_strlen(tag);
2425
for (i = 0; i < len - plen; i++) {
2426
if (os_memcmp(buf + i, tag, plen) == 0)
2434
static int tlsv1_client_add_cert(struct x509_certificate **chain,
2435
const u8 *buf, size_t len)
2437
const u8 *pos, *end;
2441
pos = search_tag(pem_cert_begin, buf, len);
2443
wpa_printf(MSG_DEBUG, "TLSv1: No PEM certificate tag found - "
2444
"assume DER format");
2445
return tlsv1_client_add_cert_der(chain, buf, len);
2448
wpa_printf(MSG_DEBUG, "TLSv1: Converting PEM format certificate into "
2452
pos += os_strlen(pem_cert_begin);
2453
end = search_tag(pem_cert_end, pos, buf + len - pos);
2455
wpa_printf(MSG_INFO, "TLSv1: Could not find PEM "
2456
"certificate end tag (%s)", pem_cert_end);
2460
der = base64_decode(pos, end - pos, &der_len);
2462
wpa_printf(MSG_INFO, "TLSv1: Could not decode PEM "
2467
if (tlsv1_client_add_cert_der(chain, der, der_len) < 0) {
2468
wpa_printf(MSG_INFO, "TLSv1: Failed to parse PEM "
2469
"certificate after DER conversion");
2476
end += os_strlen(pem_cert_end);
2477
pos = search_tag(pem_cert_begin, end, buf + len - end);
2484
static int tlsv1_client_set_cert_chain(struct x509_certificate **chain,
2485
const char *cert, const u8 *cert_blob,
2486
size_t cert_blob_len)
2489
return tlsv1_client_add_cert(chain, cert_blob, cert_blob_len);
2496
buf = (u8 *) os_readfile(cert, &len);
2498
wpa_printf(MSG_INFO, "TLSv1: Failed to read '%s'",
2503
ret = tlsv1_client_add_cert(chain, buf, len);
2513
* tlsv1_client_set_ca_cert - Set trusted CA certificate(s)
2514
* @conn: TLSv1 client connection data from tlsv1_client_init()
2515
* @cert: File or reference name for X.509 certificate in PEM or DER format
2516
* @cert_blob: cert as inlined data or %NULL if not used
2517
* @cert_blob_len: ca_cert_blob length
2518
* @path: Path to CA certificates (not yet supported)
2519
* Returns: 0 on success, -1 on failure
2521
int tlsv1_client_set_ca_cert(struct tlsv1_client *conn, const char *cert,
2522
const u8 *cert_blob, size_t cert_blob_len,
2525
if (tlsv1_client_set_cert_chain(&conn->trusted_certs, cert,
2526
cert_blob, cert_blob_len) < 0)
2530
/* TODO: add support for reading number of certificate files */
2531
wpa_printf(MSG_INFO, "TLSv1: Use of CA certificate directory "
2532
"not yet supported");
2541
* tlsv1_client_set_client_cert - Set client certificate
2542
* @conn: TLSv1 client connection data from tlsv1_client_init()
2543
* @cert: File or reference name for X.509 certificate in PEM or DER format
2544
* @cert_blob: cert as inlined data or %NULL if not used
2545
* @cert_blob_len: ca_cert_blob length
2546
* Returns: 0 on success, -1 on failure
2548
int tlsv1_client_set_client_cert(struct tlsv1_client *conn, const char *cert,
2549
const u8 *cert_blob, size_t cert_blob_len)
2551
return tlsv1_client_set_cert_chain(&conn->client_cert, cert,
2552
cert_blob, cert_blob_len);
2556
static int tlsv1_client_set_key(struct tlsv1_client *conn,
2557
const u8 *key, size_t len)
2559
conn->client_key = crypto_private_key_import(key, len);
2560
if (conn->client_key == NULL) {
2561
wpa_printf(MSG_INFO, "TLSv1: Failed to parse private key");
2569
* tlsv1_client_set_private_key - Set client private key
2570
* @conn: TLSv1 client connection data from tlsv1_client_init()
2571
* @private_key: File or reference name for the key in PEM or DER format
2572
* @private_key_passwd: Passphrase for decrypted private key, %NULL if no
2573
* passphrase is used.
2574
* @private_key_blob: private_key as inlined data or %NULL if not used
2575
* @private_key_blob_len: private_key_blob length
2576
* Returns: 0 on success, -1 on failure
2578
int tlsv1_client_set_private_key(struct tlsv1_client *conn,
2579
const char *private_key,
2580
const char *private_key_passwd,
2581
const u8 *private_key_blob,
2582
size_t private_key_blob_len)
2584
crypto_private_key_free(conn->client_key);
2585
conn->client_key = NULL;
2587
if (private_key_blob)
2588
return tlsv1_client_set_key(conn, private_key_blob,
2589
private_key_blob_len);
2596
buf = (u8 *) os_readfile(private_key, &len);
2598
wpa_printf(MSG_INFO, "TLSv1: Failed to read '%s'",
2603
ret = tlsv1_client_set_key(conn, buf, len);
added
removed
tlsv1_client.c
