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EAP-TTLS: Allow TTLS to be built without MSCHAPv2 support
[thirdparty/hostap.git] / src / crypto / tls_openssl.c
CommitLineData
6fc6879b 1/*
81c85c06 2 * SSL/TLS interface functions for OpenSSL
235279e7 3 * Copyright (c) 2004-2011, Jouni Malinen <j@w1.fi>
6fc6879b 4 *
0f3d578e
JM		 5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
6fc6879b
JM		 7 */
8
9#include "includes.h"
10
11#ifndef CONFIG_SMARTCARD
12#ifndef OPENSSL_NO_ENGINE
13#define OPENSSL_NO_ENGINE
14#endif
15#endif
16
17#include <openssl/ssl.h>
18#include <openssl/err.h>
19#include <openssl/pkcs12.h>
20#include <openssl/x509v3.h>
21#ifndef OPENSSL_NO_ENGINE
22#include <openssl/engine.h>
23#endif /* OPENSSL_NO_ENGINE */
24
2a0cd067
DS		 25#ifdef ANDROID
26#include <openssl/pem.h>
27#include "keystore_get.h"
28#endif /* ANDROID */
29
6fc6879b 30#include "common.h"
00468b46 31#include "crypto.h"
6fc6879b
JM		 32#include "tls.h"
33
34#if OPENSSL_VERSION_NUMBER >= 0x0090800fL
35#define OPENSSL_d2i_TYPE const unsigned char **
36#else
37#define OPENSSL_d2i_TYPE unsigned char **
38#endif
39
191a8ad7 40#ifdef SSL_F_SSL_SET_SESSION_TICKET_EXT
0cf03892
JM		 41#ifdef SSL_OP_NO_TICKET
42/*
43 * Session ticket override patch was merged into OpenSSL 0.9.9 tree on
44 * 2008-11-15. This version uses a bit different API compared to the old patch.
45 */
46#define CONFIG_OPENSSL_TICKET_OVERRIDE
47#endif
48#endif
49
6fc6879b
JM		 50static int tls_openssl_ref_count = 0;
51
00468b46
JM		 52struct tls_global {
53 void (*event_cb)(void *ctx, enum tls_event ev,
54 union tls_event_data *data);
55 void *cb_ctx;
1b414f59 56 int cert_in_cb;
00468b46
JM		 57};
58
59static struct tls_global *tls_global = NULL;
60
61
6fc6879b
JM		 62struct tls_connection {
63 SSL *ssl;
64 BIO *ssl_in, *ssl_out;
65#ifndef OPENSSL_NO_ENGINE
66 ENGINE *engine; /* functional reference to the engine */
67 EVP_PKEY *private_key; /* the private key if using engine */
68#endif /* OPENSSL_NO_ENGINE */
69 char *subject_match, *altsubject_match;
70 int read_alerts, write_alerts, failed;
71
72 tls_session_ticket_cb session_ticket_cb;
73 void *session_ticket_cb_ctx;
74
75 /* SessionTicket received from OpenSSL hello_extension_cb (server) */
76 u8 *session_ticket;
77 size_t session_ticket_len;
00468b46 78
8d6399e4
JM		 79 unsigned int ca_cert_verify:1;
80 unsigned int cert_probe:1;
81 unsigned int server_cert_only:1;
00468b46
JM		 82
83 u8 srv_cert_hash[32];
235279e7
JM		 84
85 unsigned int flags;
6fc6879b
JM		 86};
87
88
89#ifdef CONFIG_NO_STDOUT_DEBUG
90
91static void _tls_show_errors(void)
92{
93 unsigned long err;
94
95 while ((err = ERR_get_error())) {
96 /* Just ignore the errors, since stdout is disabled */
97 }
98}
99#define tls_show_errors(l, f, t) _tls_show_errors()
100
101#else /* CONFIG_NO_STDOUT_DEBUG */
102
103static void tls_show_errors(int level, const char *func, const char *txt)
104{
105 unsigned long err;
106
107 wpa_printf(level, "OpenSSL: %s - %s %s",
108 func, txt, ERR_error_string(ERR_get_error(), NULL));
109
110 while ((err = ERR_get_error())) {
111 wpa_printf(MSG_INFO, "OpenSSL: pending error: %s",
112 ERR_error_string(err, NULL));
113 }
114}
115
116#endif /* CONFIG_NO_STDOUT_DEBUG */
117
118
119#ifdef CONFIG_NATIVE_WINDOWS
120
121/* Windows CryptoAPI and access to certificate stores */
122#include <wincrypt.h>
123
124#ifdef __MINGW32_VERSION
125/*
126 * MinGW does not yet include all the needed definitions for CryptoAPI, so
127 * define here whatever extra is needed.
128 */
6fc6879b
JM		 129#define CERT_SYSTEM_STORE_CURRENT_USER (1 << 16)
130#define CERT_STORE_READONLY_FLAG 0x00008000
131#define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000
6fc6879b
JM		 132
133#endif /* __MINGW32_VERSION */
134
135
136struct cryptoapi_rsa_data {
137 const CERT_CONTEXT *cert;
138 HCRYPTPROV crypt_prov;
139 DWORD key_spec;
140 BOOL free_crypt_prov;
141};
142
143
144static void cryptoapi_error(const char *msg)
145{
146 wpa_printf(MSG_INFO, "CryptoAPI: %s; err=%u",
147 msg, (unsigned int) GetLastError());
148}
149
150
151static int cryptoapi_rsa_pub_enc(int flen, const unsigned char *from,
152 unsigned char *to, RSA *rsa, int padding)
153{
154 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
155 return 0;
156}
157
158
159static int cryptoapi_rsa_pub_dec(int flen, const unsigned char *from,
160 unsigned char *to, RSA *rsa, int padding)
161{
162 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
163 return 0;
164}
165
166
167static int cryptoapi_rsa_priv_enc(int flen, const unsigned char *from,
168 unsigned char *to, RSA *rsa, int padding)
169{
170 struct cryptoapi_rsa_data *priv =
171 (struct cryptoapi_rsa_data *) rsa->meth->app_data;
172 HCRYPTHASH hash;
173 DWORD hash_size, len, i;
174 unsigned char *buf = NULL;
175 int ret = 0;
176
177 if (priv == NULL) {
178 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
179 ERR_R_PASSED_NULL_PARAMETER);
180 return 0;
181 }
182
183 if (padding != RSA_PKCS1_PADDING) {
184 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
185 RSA_R_UNKNOWN_PADDING_TYPE);
186 return 0;
187 }
188
189 if (flen != 16 /* MD5 */ + 20 /* SHA-1 */) {
190 wpa_printf(MSG_INFO, "%s - only MD5-SHA1 hash supported",
191 __func__);
192 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
193 RSA_R_INVALID_MESSAGE_LENGTH);
194 return 0;
195 }
196
197 if (!CryptCreateHash(priv->crypt_prov, CALG_SSL3_SHAMD5, 0, 0, &hash))
198 {
199 cryptoapi_error("CryptCreateHash failed");
200 return 0;
201 }
202
203 len = sizeof(hash_size);
204 if (!CryptGetHashParam(hash, HP_HASHSIZE, (BYTE *) &hash_size, &len,
205 0)) {
206 cryptoapi_error("CryptGetHashParam failed");
207 goto err;
208 }
209
210 if ((int) hash_size != flen) {
211 wpa_printf(MSG_INFO, "CryptoAPI: Invalid hash size (%u != %d)",
212 (unsigned) hash_size, flen);
213 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
214 RSA_R_INVALID_MESSAGE_LENGTH);
215 goto err;
216 }
217 if (!CryptSetHashParam(hash, HP_HASHVAL, (BYTE * ) from, 0)) {
218 cryptoapi_error("CryptSetHashParam failed");
219 goto err;
220 }
221
222 len = RSA_size(rsa);
223 buf = os_malloc(len);
224 if (buf == NULL) {
225 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_MALLOC_FAILURE);
226 goto err;
227 }
228
229 if (!CryptSignHash(hash, priv->key_spec, NULL, 0, buf, &len)) {
230 cryptoapi_error("CryptSignHash failed");
231 goto err;
232 }
233
234 for (i = 0; i < len; i++)
235 to[i] = buf[len - i - 1];
236 ret = len;
237
238err:
239 os_free(buf);
240 CryptDestroyHash(hash);
241
242 return ret;
243}
244
245
246static int cryptoapi_rsa_priv_dec(int flen, const unsigned char *from,
247 unsigned char *to, RSA *rsa, int padding)
248{
249 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
250 return 0;
251}
252
253
254static void cryptoapi_free_data(struct cryptoapi_rsa_data *priv)
255{
256 if (priv == NULL)
257 return;
258 if (priv->crypt_prov && priv->free_crypt_prov)
259 CryptReleaseContext(priv->crypt_prov, 0);
260 if (priv->cert)
261 CertFreeCertificateContext(priv->cert);
262 os_free(priv);
263}
264
265
266static int cryptoapi_finish(RSA *rsa)
267{
268 cryptoapi_free_data((struct cryptoapi_rsa_data *) rsa->meth->app_data);
269 os_free((void *) rsa->meth);
270 rsa->meth = NULL;
271 return 1;
272}
273
274
275static const CERT_CONTEXT * cryptoapi_find_cert(const char *name, DWORD store)
276{
277 HCERTSTORE cs;
278 const CERT_CONTEXT *ret = NULL;
279
280 cs = CertOpenStore((LPCSTR) CERT_STORE_PROV_SYSTEM, 0, 0,
281 store | CERT_STORE_OPEN_EXISTING_FLAG |
282 CERT_STORE_READONLY_FLAG, L"MY");
283 if (cs == NULL) {
284 cryptoapi_error("Failed to open 'My system store'");
285 return NULL;
286 }
287
288 if (strncmp(name, "cert://", 7) == 0) {
289 unsigned short wbuf[255];
290 MultiByteToWideChar(CP_ACP, 0, name + 7, -1, wbuf, 255);
291 ret = CertFindCertificateInStore(cs, X509_ASN_ENCODING |
292 PKCS_7_ASN_ENCODING,
293 0, CERT_FIND_SUBJECT_STR,
294 wbuf, NULL);
295 } else if (strncmp(name, "hash://", 7) == 0) {
296 CRYPT_HASH_BLOB blob;
297 int len;
298 const char *hash = name + 7;
299 unsigned char *buf;
300
301 len = os_strlen(hash) / 2;
302 buf = os_malloc(len);
303 if (buf && hexstr2bin(hash, buf, len) == 0) {
304 blob.cbData = len;
305 blob.pbData = buf;
306 ret = CertFindCertificateInStore(cs,
307 X509_ASN_ENCODING |
308 PKCS_7_ASN_ENCODING,
309 0, CERT_FIND_HASH,
310 &blob, NULL);
311 }
312 os_free(buf);
313 }
314
315 CertCloseStore(cs, 0);
316
317 return ret;
318}
319
320
321static int tls_cryptoapi_cert(SSL *ssl, const char *name)
322{
323 X509 *cert = NULL;
324 RSA *rsa = NULL, *pub_rsa;
325 struct cryptoapi_rsa_data *priv;
326 RSA_METHOD *rsa_meth;
327
328 if (name == NULL ||
329 (strncmp(name, "cert://", 7) != 0 &&
330 strncmp(name, "hash://", 7) != 0))
331 return -1;
332
333 priv = os_zalloc(sizeof(*priv));
334 rsa_meth = os_zalloc(sizeof(*rsa_meth));
335 if (priv == NULL || rsa_meth == NULL) {
336 wpa_printf(MSG_WARNING, "CryptoAPI: Failed to allocate memory "
337 "for CryptoAPI RSA method");
338 os_free(priv);
339 os_free(rsa_meth);
340 return -1;
341 }
342
343 priv->cert = cryptoapi_find_cert(name, CERT_SYSTEM_STORE_CURRENT_USER);
344 if (priv->cert == NULL) {
345 priv->cert = cryptoapi_find_cert(
346 name, CERT_SYSTEM_STORE_LOCAL_MACHINE);
347 }
348 if (priv->cert == NULL) {
349 wpa_printf(MSG_INFO, "CryptoAPI: Could not find certificate "
350 "'%s'", name);
351 goto err;
352 }
353
354 cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &priv->cert->pbCertEncoded,
355 priv->cert->cbCertEncoded);
356 if (cert == NULL) {
357 wpa_printf(MSG_INFO, "CryptoAPI: Could not process X509 DER "
358 "encoding");
359 goto err;
360 }
361
6fc6879b
JM		 362 if (!CryptAcquireCertificatePrivateKey(priv->cert,
363 CRYPT_ACQUIRE_COMPARE_KEY_FLAG,
364 NULL, &priv->crypt_prov,
365 &priv->key_spec,
366 &priv->free_crypt_prov)) {
367 cryptoapi_error("Failed to acquire a private key for the "
368 "certificate");
369 goto err;
370 }
371
372 rsa_meth->name = "Microsoft CryptoAPI RSA Method";
373 rsa_meth->rsa_pub_enc = cryptoapi_rsa_pub_enc;
374 rsa_meth->rsa_pub_dec = cryptoapi_rsa_pub_dec;
375 rsa_meth->rsa_priv_enc = cryptoapi_rsa_priv_enc;
376 rsa_meth->rsa_priv_dec = cryptoapi_rsa_priv_dec;
377 rsa_meth->finish = cryptoapi_finish;
378 rsa_meth->flags = RSA_METHOD_FLAG_NO_CHECK;
379 rsa_meth->app_data = (char *) priv;
380
381 rsa = RSA_new();
382 if (rsa == NULL) {
383 SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE,
384 ERR_R_MALLOC_FAILURE);
385 goto err;
386 }
387
388 if (!SSL_use_certificate(ssl, cert)) {
389 RSA_free(rsa);
390 rsa = NULL;
391 goto err;
392 }
393 pub_rsa = cert->cert_info->key->pkey->pkey.rsa;
394 X509_free(cert);
395 cert = NULL;
396
397 rsa->n = BN_dup(pub_rsa->n);
398 rsa->e = BN_dup(pub_rsa->e);
399 if (!RSA_set_method(rsa, rsa_meth))
400 goto err;
401
402 if (!SSL_use_RSAPrivateKey(ssl, rsa))
403 goto err;
404 RSA_free(rsa);
405
406 return 0;
407
408err:
409 if (cert)
410 X509_free(cert);
411 if (rsa)
412 RSA_free(rsa);
413 else {
414 os_free(rsa_meth);
415 cryptoapi_free_data(priv);
416 }
417 return -1;
418}
419
420
421static int tls_cryptoapi_ca_cert(SSL_CTX *ssl_ctx, SSL *ssl, const char *name)
422{
423 HCERTSTORE cs;
424 PCCERT_CONTEXT ctx = NULL;
425 X509 *cert;
426 char buf[128];
427 const char *store;
428#ifdef UNICODE
429 WCHAR *wstore;
430#endif /* UNICODE */
431
6fc6879b
JM		 432 if (name == NULL || strncmp(name, "cert_store://", 13) != 0)
433 return -1;
434
435 store = name + 13;
436#ifdef UNICODE
437 wstore = os_malloc((os_strlen(store) + 1) * sizeof(WCHAR));
438 if (wstore == NULL)
439 return -1;
440 wsprintf(wstore, L"%S", store);
441 cs = CertOpenSystemStore(0, wstore);
442 os_free(wstore);
443#else /* UNICODE */
444 cs = CertOpenSystemStore(0, store);
445#endif /* UNICODE */
446 if (cs == NULL) {
447 wpa_printf(MSG_DEBUG, "%s: failed to open system cert store "
448 "'%s': error=%d", __func__, store,
449 (int) GetLastError());
450 return -1;
451 }
452
453 while ((ctx = CertEnumCertificatesInStore(cs, ctx))) {
454 cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ctx->pbCertEncoded,
455 ctx->cbCertEncoded);
456 if (cert == NULL) {
457 wpa_printf(MSG_INFO, "CryptoAPI: Could not process "
458 "X509 DER encoding for CA cert");
459 continue;
460 }
461
462 X509_NAME_oneline(X509_get_subject_name(cert), buf,
463 sizeof(buf));
464 wpa_printf(MSG_DEBUG, "OpenSSL: Loaded CA certificate for "
465 "system certificate store: subject='%s'", buf);
466
467 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
468 tls_show_errors(MSG_WARNING, __func__,
469 "Failed to add ca_cert to OpenSSL "
470 "certificate store");
471 }
472
473 X509_free(cert);
474 }
475
476 if (!CertCloseStore(cs, 0)) {
477 wpa_printf(MSG_DEBUG, "%s: failed to close system cert store "
478 "'%s': error=%d", __func__, name + 13,
479 (int) GetLastError());
480 }
481
482 return 0;
483}
484
485
486#else /* CONFIG_NATIVE_WINDOWS */
487
488static int tls_cryptoapi_cert(SSL *ssl, const char *name)
489{
490 return -1;
491}
492
493#endif /* CONFIG_NATIVE_WINDOWS */
494
495
496static void ssl_info_cb(const SSL *ssl, int where, int ret)
497{
498 const char *str;
499 int w;
500
501 wpa_printf(MSG_DEBUG, "SSL: (where=0x%x ret=0x%x)", where, ret);
502 w = where & ~SSL_ST_MASK;
503 if (w & SSL_ST_CONNECT)
504 str = "SSL_connect";
505 else if (w & SSL_ST_ACCEPT)
506 str = "SSL_accept";
507 else
508 str = "undefined";
509
510 if (where & SSL_CB_LOOP) {
511 wpa_printf(MSG_DEBUG, "SSL: %s:%s",
512 str, SSL_state_string_long(ssl));
513 } else if (where & SSL_CB_ALERT) {
514 wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s",
515 where & SSL_CB_READ ?
516 "read (remote end reported an error)" :
517 "write (local SSL3 detected an error)",
518 SSL_alert_type_string_long(ret),
519 SSL_alert_desc_string_long(ret));
520 if ((ret >> 8) == SSL3_AL_FATAL) {
521 struct tls_connection *conn =
522 SSL_get_app_data((SSL *) ssl);
523 if (where & SSL_CB_READ)
524 conn->read_alerts++;
525 else
526 conn->write_alerts++;
527 }
dd7fec1f
PS		 528 if (tls_global->event_cb != NULL) {
529 union tls_event_data ev;
530 os_memset(&ev, 0, sizeof(ev));
531 ev.alert.is_local = !(where & SSL_CB_READ);
532 ev.alert.type = SSL_alert_type_string_long(ret);
533 ev.alert.description = SSL_alert_desc_string_long(ret);
534 tls_global->event_cb(tls_global->cb_ctx, TLS_ALERT,
535 &ev);
536 }
6fc6879b
JM		 537 } else if (where & SSL_CB_EXIT && ret <= 0) {
538 wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s",
539 str, ret == 0 ? "failed" : "error",
540 SSL_state_string_long(ssl));
541 }
542}
543
544
545#ifndef OPENSSL_NO_ENGINE
546/**
547 * tls_engine_load_dynamic_generic - load any openssl engine
548 * @pre: an array of commands and values that load an engine initialized
549 * in the engine specific function
550 * @post: an array of commands and values that initialize an already loaded
551 * engine (or %NULL if not required)
552 * @id: the engine id of the engine to load (only required if post is not %NULL
553 *
554 * This function is a generic function that loads any openssl engine.
555 *
556 * Returns: 0 on success, -1 on failure
557 */
558static int tls_engine_load_dynamic_generic(const char *pre[],
559 const char *post[], const char *id)
560{
561 ENGINE *engine;
562 const char *dynamic_id = "dynamic";
563
564 engine = ENGINE_by_id(id);
565 if (engine) {
566 ENGINE_free(engine);
567 wpa_printf(MSG_DEBUG, "ENGINE: engine '%s' is already "
568 "available", id);
569 return 0;
570 }
571 ERR_clear_error();
572
573 engine = ENGINE_by_id(dynamic_id);
574 if (engine == NULL) {
575 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
576 dynamic_id,
577 ERR_error_string(ERR_get_error(), NULL));
578 return -1;
579 }
580
581 /* Perform the pre commands. This will load the engine. */
582 while (pre && pre[0]) {
583 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", pre[0], pre[1]);
584 if (ENGINE_ctrl_cmd_string(engine, pre[0], pre[1], 0) == 0) {
585 wpa_printf(MSG_INFO, "ENGINE: ctrl cmd_string failed: "
586 "%s %s [%s]", pre[0], pre[1],
587 ERR_error_string(ERR_get_error(), NULL));
588 ENGINE_free(engine);
589 return -1;
590 }
591 pre += 2;
592 }
593
594 /*
595 * Free the reference to the "dynamic" engine. The loaded engine can
596 * now be looked up using ENGINE_by_id().
597 */
598 ENGINE_free(engine);
599
600 engine = ENGINE_by_id(id);
601 if (engine == NULL) {
602 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
603 id, ERR_error_string(ERR_get_error(), NULL));
604 return -1;
605 }
606
607 while (post && post[0]) {
608 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", post[0], post[1]);
609 if (ENGINE_ctrl_cmd_string(engine, post[0], post[1], 0) == 0) {
610 wpa_printf(MSG_DEBUG, "ENGINE: ctrl cmd_string failed:"
611 " %s %s [%s]", post[0], post[1],
612 ERR_error_string(ERR_get_error(), NULL));
613 ENGINE_remove(engine);
614 ENGINE_free(engine);
615 return -1;
616 }
617 post += 2;
618 }
619 ENGINE_free(engine);
620
621 return 0;
622}
623
624
625/**
626 * tls_engine_load_dynamic_pkcs11 - load the pkcs11 engine provided by opensc
627 * @pkcs11_so_path: pksc11_so_path from the configuration
628 * @pcks11_module_path: pkcs11_module_path from the configuration
629 */
630static int tls_engine_load_dynamic_pkcs11(const char *pkcs11_so_path,
631 const char *pkcs11_module_path)
632{
633 char *engine_id = "pkcs11";
634 const char *pre_cmd[] = {
635 "SO_PATH", NULL /* pkcs11_so_path */,
636 "ID", NULL /* engine_id */,
637 "LIST_ADD", "1",
638 /* "NO_VCHECK", "1", */
639 "LOAD", NULL,
640 NULL, NULL
641 };
642 const char *post_cmd[] = {
643 "MODULE_PATH", NULL /* pkcs11_module_path */,
644 NULL, NULL
645 };
646
647 if (!pkcs11_so_path || !pkcs11_module_path)
648 return 0;
649
650 pre_cmd[1] = pkcs11_so_path;
651 pre_cmd[3] = engine_id;
652 post_cmd[1] = pkcs11_module_path;
653
654 wpa_printf(MSG_DEBUG, "ENGINE: Loading pkcs11 Engine from %s",
655 pkcs11_so_path);
656
657 return tls_engine_load_dynamic_generic(pre_cmd, post_cmd, engine_id);
658}
659
660
661/**
662 * tls_engine_load_dynamic_opensc - load the opensc engine provided by opensc
663 * @opensc_so_path: opensc_so_path from the configuration
664 */
665static int tls_engine_load_dynamic_opensc(const char *opensc_so_path)
666{
667 char *engine_id = "opensc";
668 const char *pre_cmd[] = {
669 "SO_PATH", NULL /* opensc_so_path */,
670 "ID", NULL /* engine_id */,
671 "LIST_ADD", "1",
672 "LOAD", NULL,
673 NULL, NULL
674 };
675
676 if (!opensc_so_path)
677 return 0;
678
679 pre_cmd[1] = opensc_so_path;
680 pre_cmd[3] = engine_id;
681
682 wpa_printf(MSG_DEBUG, "ENGINE: Loading OpenSC Engine from %s",
683 opensc_so_path);
684
685 return tls_engine_load_dynamic_generic(pre_cmd, NULL, engine_id);
686}
687#endif /* OPENSSL_NO_ENGINE */
688
689
690void * tls_init(const struct tls_config *conf)
691{
692 SSL_CTX *ssl;
693
694 if (tls_openssl_ref_count == 0) {
00468b46
JM		 695 tls_global = os_zalloc(sizeof(*tls_global));
696 if (tls_global == NULL)
697 return NULL;
698 if (conf) {
699 tls_global->event_cb = conf->event_cb;
700 tls_global->cb_ctx = conf->cb_ctx;
1b414f59 701 tls_global->cert_in_cb = conf->cert_in_cb;
00468b46
JM		 702 }
703
76f04b38
JM		 704#ifdef CONFIG_FIPS
705#ifdef OPENSSL_FIPS
cf123d7f 706 if (conf && conf->fips_mode) {
76f04b38
JM		 707 if (!FIPS_mode_set(1)) {
708 wpa_printf(MSG_ERROR, "Failed to enable FIPS "
709 "mode");
710 ERR_load_crypto_strings();
711 ERR_print_errors_fp(stderr);
b36540db
JM		 712 os_free(tls_global);
713 tls_global = NULL;
76f04b38
JM		 714 return NULL;
715 } else
716 wpa_printf(MSG_INFO, "Running in FIPS mode");
717 }
718#else /* OPENSSL_FIPS */
cf123d7f 719 if (conf && conf->fips_mode) {
76f04b38
JM		 720 wpa_printf(MSG_ERROR, "FIPS mode requested, but not "
721 "supported");
b36540db
JM		 722 os_free(tls_global);
723 tls_global = NULL;
76f04b38
JM		 724 return NULL;
725 }
726#endif /* OPENSSL_FIPS */
727#endif /* CONFIG_FIPS */
6fc6879b
JM		 728 SSL_load_error_strings();
729 SSL_library_init();
4bb3377b 730#if (OPENSSL_VERSION_NUMBER >= 0x0090800fL) && !defined(OPENSSL_NO_SHA256)
e1ffdfc1
JM		 731 EVP_add_digest(EVP_sha256());
732#endif /* OPENSSL_NO_SHA256 */
6fc6879b
JM		 733 /* TODO: if /dev/urandom is available, PRNG is seeded
734 * automatically. If this is not the case, random data should
735 * be added here. */
736
737#ifdef PKCS12_FUNCS
1056dad7
JM		 738#ifndef OPENSSL_NO_RC2
739 /*
740 * 40-bit RC2 is commonly used in PKCS#12 files, so enable it.
741 * This is enabled by PKCS12_PBE_add() in OpenSSL 0.9.8
742 * versions, but it looks like OpenSSL 1.0.0 does not do that
743 * anymore.
744 */
745 EVP_add_cipher(EVP_rc2_40_cbc());
746#endif /* OPENSSL_NO_RC2 */
6fc6879b
JM		 747 PKCS12_PBE_add();
748#endif /* PKCS12_FUNCS */
749 }
750 tls_openssl_ref_count++;
751
752 ssl = SSL_CTX_new(TLSv1_method());
753 if (ssl == NULL)
754 return NULL;
755
756 SSL_CTX_set_info_callback(ssl, ssl_info_cb);
757
758#ifndef OPENSSL_NO_ENGINE
759 if (conf &&
760 (conf->opensc_engine_path || conf->pkcs11_engine_path ||
761 conf->pkcs11_module_path)) {
762 wpa_printf(MSG_DEBUG, "ENGINE: Loading dynamic engine");
763 ERR_load_ENGINE_strings();
764 ENGINE_load_dynamic();
765
766 if (tls_engine_load_dynamic_opensc(conf->opensc_engine_path) ||
767 tls_engine_load_dynamic_pkcs11(conf->pkcs11_engine_path,
768 conf->pkcs11_module_path)) {
769 tls_deinit(ssl);
770 return NULL;
771 }
772 }
773#endif /* OPENSSL_NO_ENGINE */
774
775 return ssl;
776}
777
778
779void tls_deinit(void *ssl_ctx)
780{
781 SSL_CTX *ssl = ssl_ctx;
782 SSL_CTX_free(ssl);
783
784 tls_openssl_ref_count--;
785 if (tls_openssl_ref_count == 0) {
786#ifndef OPENSSL_NO_ENGINE
787 ENGINE_cleanup();
788#endif /* OPENSSL_NO_ENGINE */
789 CRYPTO_cleanup_all_ex_data();
790 ERR_remove_state(0);
791 ERR_free_strings();
792 EVP_cleanup();
00468b46
JM		 793 os_free(tls_global);
794 tls_global = NULL;
6fc6879b
JM		 795 }
796}
797
798
799static int tls_engine_init(struct tls_connection *conn, const char *engine_id,
e59c91af
DS		 800 const char *pin, const char *key_id,
801 const char *cert_id, const char *ca_cert_id)
6fc6879b
JM		 802{
803#ifndef OPENSSL_NO_ENGINE
804 int ret = -1;
805 if (engine_id == NULL) {
806 wpa_printf(MSG_ERROR, "ENGINE: Engine ID not set");
807 return -1;
808 }
809 if (pin == NULL) {
810 wpa_printf(MSG_ERROR, "ENGINE: Smartcard PIN not set");
811 return -1;
812 }
813 if (key_id == NULL) {
814 wpa_printf(MSG_ERROR, "ENGINE: Key Id not set");
815 return -1;
816 }
817
818 ERR_clear_error();
819 conn->engine = ENGINE_by_id(engine_id);
820 if (!conn->engine) {
821 wpa_printf(MSG_ERROR, "ENGINE: engine %s not available [%s]",
822 engine_id, ERR_error_string(ERR_get_error(), NULL));
823 goto err;
824 }
825 if (ENGINE_init(conn->engine) != 1) {
826 wpa_printf(MSG_ERROR, "ENGINE: engine init failed "
827 "(engine: %s) [%s]", engine_id,
828 ERR_error_string(ERR_get_error(), NULL));
829 goto err;
830 }
831 wpa_printf(MSG_DEBUG, "ENGINE: engine initialized");
832
833 if (ENGINE_ctrl_cmd_string(conn->engine, "PIN", pin, 0) == 0) {
834 wpa_printf(MSG_ERROR, "ENGINE: cannot set pin [%s]",
835 ERR_error_string(ERR_get_error(), NULL));
836 goto err;
837 }
e59c91af 838 /* load private key first in-case PIN is required for cert */
6fc6879b
JM		 839 conn->private_key = ENGINE_load_private_key(conn->engine,
840 key_id, NULL, NULL);
841 if (!conn->private_key) {
842 wpa_printf(MSG_ERROR, "ENGINE: cannot load private key with id"
843 " '%s' [%s]", key_id,
844 ERR_error_string(ERR_get_error(), NULL));
845 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
846 goto err;
847 }
e59c91af
DS		 848
849 /* handle a certificate and/or CA certificate */
850 if (cert_id || ca_cert_id) {
851 const char *cmd_name = "LOAD_CERT_CTRL";
852
853 /* test if the engine supports a LOAD_CERT_CTRL */
854 if (!ENGINE_ctrl(conn->engine, ENGINE_CTRL_GET_CMD_FROM_NAME,
855 0, (void *)cmd_name, NULL)) {
856 wpa_printf(MSG_ERROR, "ENGINE: engine does not support"
857 " loading certificates");
858 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
859 goto err;
860 }
861 }
862
6fc6879b
JM		 863 return 0;
864
865err:
866 if (conn->engine) {
867 ENGINE_free(conn->engine);
868 conn->engine = NULL;
869 }
870
871 if (conn->private_key) {
872 EVP_PKEY_free(conn->private_key);
873 conn->private_key = NULL;
874 }
875
876 return ret;
877#else /* OPENSSL_NO_ENGINE */
878 return 0;
879#endif /* OPENSSL_NO_ENGINE */
880}
881
882
883static void tls_engine_deinit(struct tls_connection *conn)
884{
885#ifndef OPENSSL_NO_ENGINE
886 wpa_printf(MSG_DEBUG, "ENGINE: engine deinit");
887 if (conn->private_key) {
888 EVP_PKEY_free(conn->private_key);
889 conn->private_key = NULL;
890 }
891 if (conn->engine) {
892 ENGINE_finish(conn->engine);
893 conn->engine = NULL;
894 }
895#endif /* OPENSSL_NO_ENGINE */
896}
897
898
899int tls_get_errors(void *ssl_ctx)
900{
901 int count = 0;
902 unsigned long err;
903
904 while ((err = ERR_get_error())) {
905 wpa_printf(MSG_INFO, "TLS - SSL error: %s",
906 ERR_error_string(err, NULL));
907 count++;
908 }
909
910 return count;
911}
912
913struct tls_connection * tls_connection_init(void *ssl_ctx)
914{
915 SSL_CTX *ssl = ssl_ctx;
916 struct tls_connection *conn;
fca25ef4 917 long options;
6fc6879b
JM		 918
919 conn = os_zalloc(sizeof(*conn));
920 if (conn == NULL)
921 return NULL;
922 conn->ssl = SSL_new(ssl);
923 if (conn->ssl == NULL) {
924 tls_show_errors(MSG_INFO, __func__,
925 "Failed to initialize new SSL connection");
926 os_free(conn);
927 return NULL;
928 }
929
930 SSL_set_app_data(conn->ssl, conn);
fca25ef4
JM		 931 options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 |
932 SSL_OP_SINGLE_DH_USE;
933#ifdef SSL_OP_NO_COMPRESSION
934 options |= SSL_OP_NO_COMPRESSION;
935#endif /* SSL_OP_NO_COMPRESSION */
936 SSL_set_options(conn->ssl, options);
6fc6879b
JM		 937
938 conn->ssl_in = BIO_new(BIO_s_mem());
939 if (!conn->ssl_in) {
940 tls_show_errors(MSG_INFO, __func__,
941 "Failed to create a new BIO for ssl_in");
942 SSL_free(conn->ssl);
943 os_free(conn);
944 return NULL;
945 }
946
947 conn->ssl_out = BIO_new(BIO_s_mem());
948 if (!conn->ssl_out) {
949 tls_show_errors(MSG_INFO, __func__,
950 "Failed to create a new BIO for ssl_out");
951 SSL_free(conn->ssl);
952 BIO_free(conn->ssl_in);
953 os_free(conn);
954 return NULL;
955 }
956
957 SSL_set_bio(conn->ssl, conn->ssl_in, conn->ssl_out);
958
959 return conn;
960}
961
962
963void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn)
964{
965 if (conn == NULL)
966 return;
967 SSL_free(conn->ssl);
968 tls_engine_deinit(conn);
969 os_free(conn->subject_match);
970 os_free(conn->altsubject_match);
971 os_free(conn->session_ticket);
972 os_free(conn);
973}
974
975
976int tls_connection_established(void *ssl_ctx, struct tls_connection *conn)
977{
978 return conn ? SSL_is_init_finished(conn->ssl) : 0;
979}
980
981
982int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn)
983{
984 if (conn == NULL)
985 return -1;
986
987 /* Shutdown previous TLS connection without notifying the peer
988 * because the connection was already terminated in practice
989 * and "close notify" shutdown alert would confuse AS. */
990 SSL_set_quiet_shutdown(conn->ssl, 1);
991 SSL_shutdown(conn->ssl);
992 return 0;
993}
994
995
996static int tls_match_altsubject_component(X509 *cert, int type,
997 const char *value, size_t len)
998{
999 GENERAL_NAME *gen;
1000 void *ext;
1001 int i, found = 0;
1002
1003 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
1004
1005 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
1006 gen = sk_GENERAL_NAME_value(ext, i);
1007 if (gen->type != type)
1008 continue;
1009 if (os_strlen((char *) gen->d.ia5->data) == len &&
1010 os_memcmp(value, gen->d.ia5->data, len) == 0)
1011 found++;
1012 }
1013
1014 return found;
1015}
1016
1017
1018static int tls_match_altsubject(X509 *cert, const char *match)
1019{
1020 int type;
1021 const char *pos, *end;
1022 size_t len;
1023
1024 pos = match;
1025 do {
1026 if (os_strncmp(pos, "EMAIL:", 6) == 0) {
1027 type = GEN_EMAIL;
1028 pos += 6;
1029 } else if (os_strncmp(pos, "DNS:", 4) == 0) {
1030 type = GEN_DNS;
1031 pos += 4;
1032 } else if (os_strncmp(pos, "URI:", 4) == 0) {
1033 type = GEN_URI;
1034 pos += 4;
1035 } else {
1036 wpa_printf(MSG_INFO, "TLS: Invalid altSubjectName "
1037 "match '%s'", pos);
1038 return 0;
1039 }
1040 end = os_strchr(pos, ';');
1041 while (end) {
1042 if (os_strncmp(end + 1, "EMAIL:", 6) == 0 ||
1043 os_strncmp(end + 1, "DNS:", 4) == 0 ||
1044 os_strncmp(end + 1, "URI:", 4) == 0)
1045 break;
1046 end = os_strchr(end + 1, ';');
1047 }
1048 if (end)
1049 len = end - pos;
1050 else
1051 len = os_strlen(pos);
1052 if (tls_match_altsubject_component(cert, type, pos, len) > 0)
1053 return 1;
1054 pos = end + 1;
1055 } while (end);
1056
1057 return 0;
1058}
1059
1060
00468b46
JM		 1061static enum tls_fail_reason openssl_tls_fail_reason(int err)
1062{
1063 switch (err) {
1064 case X509_V_ERR_CERT_REVOKED:
1065 return TLS_FAIL_REVOKED;
1066 case X509_V_ERR_CERT_NOT_YET_VALID:
1067 case X509_V_ERR_CRL_NOT_YET_VALID:
1068 return TLS_FAIL_NOT_YET_VALID;
1069 case X509_V_ERR_CERT_HAS_EXPIRED:
1070 case X509_V_ERR_CRL_HAS_EXPIRED:
1071 return TLS_FAIL_EXPIRED;
1072 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
1073 case X509_V_ERR_UNABLE_TO_GET_CRL:
1074 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
1075 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
1076 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
1077 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
1078 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
1079 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
1080 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
1081 case X509_V_ERR_INVALID_CA:
1082 return TLS_FAIL_UNTRUSTED;
1083 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
1084 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
1085 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
1086 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
1087 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
1088 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
1089 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
1090 case X509_V_ERR_CERT_UNTRUSTED:
1091 case X509_V_ERR_CERT_REJECTED:
1092 return TLS_FAIL_BAD_CERTIFICATE;
1093 default:
1094 return TLS_FAIL_UNSPECIFIED;
1095 }
1096}
1097
1098
1099static struct wpabuf * get_x509_cert(X509 *cert)
1100{
1101 struct wpabuf *buf;
1102 u8 *tmp;
1103
1104 int cert_len = i2d_X509(cert, NULL);
1105 if (cert_len <= 0)
1106 return NULL;
1107
1108 buf = wpabuf_alloc(cert_len);
1109 if (buf == NULL)
1110 return NULL;
1111
1112 tmp = wpabuf_put(buf, cert_len);
1113 i2d_X509(cert, &tmp);
1114 return buf;
1115}
1116
1117
1118static void openssl_tls_fail_event(struct tls_connection *conn,
1119 X509 *err_cert, int err, int depth,
1120 const char *subject, const char *err_str,
1121 enum tls_fail_reason reason)
1122{
1123 union tls_event_data ev;
1124 struct wpabuf *cert = NULL;
1125
1126 if (tls_global->event_cb == NULL)
1127 return;
1128
1129 cert = get_x509_cert(err_cert);
1130 os_memset(&ev, 0, sizeof(ev));
1131 ev.cert_fail.reason = reason != TLS_FAIL_UNSPECIFIED ?
1132 reason : openssl_tls_fail_reason(err);
1133 ev.cert_fail.depth = depth;
1134 ev.cert_fail.subject = subject;
1135 ev.cert_fail.reason_txt = err_str;
1136 ev.cert_fail.cert = cert;
1137 tls_global->event_cb(tls_global->cb_ctx, TLS_CERT_CHAIN_FAILURE, &ev);
1138 wpabuf_free(cert);
1139}
1140
1141
1142static void openssl_tls_cert_event(struct tls_connection *conn,
1143 X509 *err_cert, int depth,
1144 const char *subject)
1145{
1146 struct wpabuf *cert = NULL;
1147 union tls_event_data ev;
1148#ifdef CONFIG_SHA256
1149 u8 hash[32];
1150#endif /* CONFIG_SHA256 */
1151
1152 if (tls_global->event_cb == NULL)
1153 return;
1154
1155 os_memset(&ev, 0, sizeof(ev));
1b414f59 1156 if (conn->cert_probe || tls_global->cert_in_cb) {
00468b46
JM		 1157 cert = get_x509_cert(err_cert);
1158 ev.peer_cert.cert = cert;
1159 }
1160#ifdef CONFIG_SHA256
1161 if (cert) {
1162 const u8 *addr[1];
1163 size_t len[1];
1164 addr[0] = wpabuf_head(cert);
1165 len[0] = wpabuf_len(cert);
1166 if (sha256_vector(1, addr, len, hash) == 0) {
1167 ev.peer_cert.hash = hash;
1168 ev.peer_cert.hash_len = sizeof(hash);
1169 }
1170 }
1171#endif /* CONFIG_SHA256 */
1172 ev.peer_cert.depth = depth;
1173 ev.peer_cert.subject = subject;
1174 tls_global->event_cb(tls_global->cb_ctx, TLS_PEER_CERTIFICATE, &ev);
1175 wpabuf_free(cert);
1176}
1177
1178
6fc6879b
JM		 1179static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
1180{
1181 char buf[256];
1182 X509 *err_cert;
1183 int err, depth;
1184 SSL *ssl;
1185 struct tls_connection *conn;
1186 char *match, *altmatch;
00468b46 1187 const char *err_str;
6fc6879b
JM		 1188
1189 err_cert = X509_STORE_CTX_get_current_cert(x509_ctx);
1190 err = X509_STORE_CTX_get_error(x509_ctx);
1191 depth = X509_STORE_CTX_get_error_depth(x509_ctx);
1192 ssl = X509_STORE_CTX_get_ex_data(x509_ctx,
1193 SSL_get_ex_data_X509_STORE_CTX_idx());
1194 X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf));
1195
1196 conn = SSL_get_app_data(ssl);
0bdaa741
JM		 1197 if (conn == NULL)
1198 return 0;
1199 match = conn->subject_match;
1200 altmatch = conn->altsubject_match;
6fc6879b 1201
00468b46
JM		 1202 if (!preverify_ok && !conn->ca_cert_verify)
1203 preverify_ok = 1;
1204 if (!preverify_ok && depth > 0 && conn->server_cert_only)
1205 preverify_ok = 1;
235279e7
JM		 1206 if (!preverify_ok && (conn->flags & TLS_CONN_DISABLE_TIME_CHECKS) &&
1207 (err == X509_V_ERR_CERT_HAS_EXPIRED ||
1208 err == X509_V_ERR_CERT_NOT_YET_VALID)) {
1209 wpa_printf(MSG_DEBUG, "OpenSSL: Ignore certificate validity "
1210 "time mismatch");
1211 preverify_ok = 1;
1212 }
00468b46
JM		 1213
1214 err_str = X509_verify_cert_error_string(err);
1215
1216#ifdef CONFIG_SHA256
1217 if (preverify_ok && depth == 0 && conn->server_cert_only) {
1218 struct wpabuf *cert;
1219 cert = get_x509_cert(err_cert);
1220 if (!cert) {
1221 wpa_printf(MSG_DEBUG, "OpenSSL: Could not fetch "
1222 "server certificate data");
6fc6879b 1223 preverify_ok = 0;
00468b46
JM		 1224 } else {
1225 u8 hash[32];
1226 const u8 *addr[1];
1227 size_t len[1];
1228 addr[0] = wpabuf_head(cert);
1229 len[0] = wpabuf_len(cert);
1230 if (sha256_vector(1, addr, len, hash) < 0 ||
1231 os_memcmp(conn->srv_cert_hash, hash, 32) != 0) {
1232 err_str = "Server certificate mismatch";
1233 err = X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN;
1234 preverify_ok = 0;
1235 }
1236 wpabuf_free(cert);
6fc6879b
JM		 1237 }
1238 }
00468b46
JM		 1239#endif /* CONFIG_SHA256 */
1240
1241 if (!preverify_ok) {
1242 wpa_printf(MSG_WARNING, "TLS: Certificate verification failed,"
1243 " error %d (%s) depth %d for '%s'", err, err_str,
1244 depth, buf);
1245 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1246 err_str, TLS_FAIL_UNSPECIFIED);
1247 return preverify_ok;
1248 }
1249
1250 wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - preverify_ok=%d "
1251 "err=%d (%s) ca_cert_verify=%d depth=%d buf='%s'",
1252 preverify_ok, err, err_str,
1253 conn->ca_cert_verify, depth, buf);
1254 if (depth == 0 && match && os_strstr(buf, match) == NULL) {
1255 wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not "
1256 "match with '%s'", buf, match);
1257 preverify_ok = 0;
1258 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1259 "Subject mismatch",
1260 TLS_FAIL_SUBJECT_MISMATCH);
1261 } else if (depth == 0 && altmatch &&
1262 !tls_match_altsubject(err_cert, altmatch)) {
1263 wpa_printf(MSG_WARNING, "TLS: altSubjectName match "
1264 "'%s' not found", altmatch);
1265 preverify_ok = 0;
1266 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1267 "AltSubject mismatch",
1268 TLS_FAIL_ALTSUBJECT_MISMATCH);
1269 } else
1270 openssl_tls_cert_event(conn, err_cert, depth, buf);
1271
1272 if (conn->cert_probe && preverify_ok && depth == 0) {
1273 wpa_printf(MSG_DEBUG, "OpenSSL: Reject server certificate "
1274 "on probe-only run");
1275 preverify_ok = 0;
1276 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1277 "Server certificate chain probe",
1278 TLS_FAIL_SERVER_CHAIN_PROBE);
1279 }
6fc6879b 1280
dd7fec1f
PS		 1281 if (preverify_ok && tls_global->event_cb != NULL)
1282 tls_global->event_cb(tls_global->cb_ctx,
1283 TLS_CERT_CHAIN_SUCCESS, NULL);
1284
6fc6879b
JM		 1285 return preverify_ok;
1286}
1287
1288
1289#ifndef OPENSSL_NO_STDIO
1290static int tls_load_ca_der(void *_ssl_ctx, const char *ca_cert)
1291{
1292 SSL_CTX *ssl_ctx = _ssl_ctx;
1293 X509_LOOKUP *lookup;
1294 int ret = 0;
1295
1296 lookup = X509_STORE_add_lookup(ssl_ctx->cert_store,
1297 X509_LOOKUP_file());
1298 if (lookup == NULL) {
1299 tls_show_errors(MSG_WARNING, __func__,
1300 "Failed add lookup for X509 store");
1301 return -1;
1302 }
1303
1304 if (!X509_LOOKUP_load_file(lookup, ca_cert, X509_FILETYPE_ASN1)) {
1305 unsigned long err = ERR_peek_error();
1306 tls_show_errors(MSG_WARNING, __func__,
1307 "Failed load CA in DER format");
1308 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1309 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1310 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1311 "cert already in hash table error",
1312 __func__);
1313 } else
1314 ret = -1;
1315 }
1316
1317 return ret;
1318}
1319#endif /* OPENSSL_NO_STDIO */
1320
1321
2a0cd067
DS		 1322#ifdef ANDROID
1323static BIO * BIO_from_keystore(const char *key)
1324{
1325 BIO *bio = NULL;
1326 char value[KEYSTORE_MESSAGE_SIZE];
1327 int length = keystore_get(key, strlen(key), value);
1328 if (length != -1 && (bio = BIO_new(BIO_s_mem())) != NULL)
1329 BIO_write(bio, value, length);
1330 return bio;
1331}
1332#endif /* ANDROID */
1333
1334
6fc6879b
JM		 1335static int tls_connection_ca_cert(void *_ssl_ctx, struct tls_connection *conn,
1336 const char *ca_cert, const u8 *ca_cert_blob,
1337 size_t ca_cert_blob_len, const char *ca_path)
1338{
1339 SSL_CTX *ssl_ctx = _ssl_ctx;
1340
1341 /*
1342 * Remove previously configured trusted CA certificates before adding
1343 * new ones.
1344 */
1345 X509_STORE_free(ssl_ctx->cert_store);
1346 ssl_ctx->cert_store = X509_STORE_new();
1347 if (ssl_ctx->cert_store == NULL) {
1348 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
1349 "certificate store", __func__);
1350 return -1;
1351 }
1352
00468b46
JM		 1353 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1354 conn->ca_cert_verify = 1;
1355
1356 if (ca_cert && os_strncmp(ca_cert, "probe://", 8) == 0) {
1357 wpa_printf(MSG_DEBUG, "OpenSSL: Probe for server certificate "
1358 "chain");
1359 conn->cert_probe = 1;
1360 conn->ca_cert_verify = 0;
1361 return 0;
1362 }
1363
1364 if (ca_cert && os_strncmp(ca_cert, "hash://", 7) == 0) {
1365#ifdef CONFIG_SHA256
1366 const char *pos = ca_cert + 7;
1367 if (os_strncmp(pos, "server/sha256/", 14) != 0) {
1368 wpa_printf(MSG_DEBUG, "OpenSSL: Unsupported ca_cert "
1369 "hash value '%s'", ca_cert);
1370 return -1;
1371 }
1372 pos += 14;
1373 if (os_strlen(pos) != 32 * 2) {
1374 wpa_printf(MSG_DEBUG, "OpenSSL: Unexpected SHA256 "
1375 "hash length in ca_cert '%s'", ca_cert);
1376 return -1;
1377 }
1378 if (hexstr2bin(pos, conn->srv_cert_hash, 32) < 0) {
1379 wpa_printf(MSG_DEBUG, "OpenSSL: Invalid SHA256 hash "
1380 "value in ca_cert '%s'", ca_cert);
1381 return -1;
1382 }
1383 conn->server_cert_only = 1;
1384 wpa_printf(MSG_DEBUG, "OpenSSL: Checking only server "
1385 "certificate match");
1386 return 0;
1387#else /* CONFIG_SHA256 */
1388 wpa_printf(MSG_INFO, "No SHA256 included in the build - "
1389 "cannot validate server certificate hash");
1390 return -1;
1391#endif /* CONFIG_SHA256 */
1392 }
1393
6fc6879b
JM		 1394 if (ca_cert_blob) {
1395 X509 *cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ca_cert_blob,
1396 ca_cert_blob_len);
1397 if (cert == NULL) {
1398 tls_show_errors(MSG_WARNING, __func__,
1399 "Failed to parse ca_cert_blob");
1400 return -1;
1401 }
1402
1403 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
1404 unsigned long err = ERR_peek_error();
1405 tls_show_errors(MSG_WARNING, __func__,
1406 "Failed to add ca_cert_blob to "
1407 "certificate store");
1408 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1409 ERR_GET_REASON(err) ==
1410 X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1411 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1412 "cert already in hash table error",
1413 __func__);
1414 } else {
1415 X509_free(cert);
1416 return -1;
1417 }
1418 }
1419 X509_free(cert);
1420 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob "
1421 "to certificate store", __func__);
6fc6879b
JM		 1422 return 0;
1423 }
1424
2a0cd067
DS		 1425#ifdef ANDROID
1426 if (ca_cert && os_strncmp("keystore://", ca_cert, 11) == 0) {
1427 BIO *bio = BIO_from_keystore(&ca_cert[11]);
1428 STACK_OF(X509_INFO) *stack = NULL;
1429 int i;
1430
1431 if (bio) {
1432 stack = PEM_X509_INFO_read_bio(bio, NULL, NULL, NULL);
1433 BIO_free(bio);
1434 }
1435 if (!stack)
1436 return -1;
1437
1438 for (i = 0; i < sk_X509_INFO_num(stack); ++i) {
1439 X509_INFO *info = sk_X509_INFO_value(stack, i);
1440 if (info->x509) {
1441 X509_STORE_add_cert(ssl_ctx->cert_store,
1442 info->x509);
1443 }
1444 if (info->crl) {
1445 X509_STORE_add_crl(ssl_ctx->cert_store,
1446 info->crl);
1447 }
1448 }
1449 sk_X509_INFO_pop_free(stack, X509_INFO_free);
1450 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1451 return 0;
1452 }
1453#endif /* ANDROID */
1454
6fc6879b
JM		 1455#ifdef CONFIG_NATIVE_WINDOWS
1456 if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) ==
1457 0) {
1458 wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from "
1459 "system certificate store");
6fc6879b
JM		 1460 return 0;
1461 }
1462#endif /* CONFIG_NATIVE_WINDOWS */
1463
1464 if (ca_cert || ca_path) {
1465#ifndef OPENSSL_NO_STDIO
1466 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) !=
1467 1) {
1468 tls_show_errors(MSG_WARNING, __func__,
1469 "Failed to load root certificates");
1470 if (ca_cert &&
1471 tls_load_ca_der(ssl_ctx, ca_cert) == 0) {
1472 wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded "
1473 "DER format CA certificate",
1474 __func__);
1475 } else
1476 return -1;
1477 } else {
1478 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1479 "certificate(s) loaded");
1480 tls_get_errors(ssl_ctx);
1481 }
6fc6879b
JM		 1482#else /* OPENSSL_NO_STDIO */
1483 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
1484 __func__);
1485 return -1;
1486#endif /* OPENSSL_NO_STDIO */
1487 } else {
1488 /* No ca_cert configured - do not try to verify server
1489 * certificate */
00468b46 1490 conn->ca_cert_verify = 0;
6fc6879b
JM		 1491 }
1492
1493 return 0;
1494}
1495
1496
1497static int tls_global_ca_cert(SSL_CTX *ssl_ctx, const char *ca_cert)
1498{
1499 if (ca_cert) {
1500 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1)
1501 {
1502 tls_show_errors(MSG_WARNING, __func__,
1503 "Failed to load root certificates");
1504 return -1;
1505 }
1506
1507 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1508 "certificate(s) loaded");
1509
1510#ifndef OPENSSL_NO_STDIO
1511 /* Add the same CAs to the client certificate requests */
1512 SSL_CTX_set_client_CA_list(ssl_ctx,
1513 SSL_load_client_CA_file(ca_cert));
1514#endif /* OPENSSL_NO_STDIO */
1515 }
1516
1517 return 0;
1518}
1519
1520
1521int tls_global_set_verify(void *ssl_ctx, int check_crl)
1522{
1523 int flags;
1524
1525 if (check_crl) {
1526 X509_STORE *cs = SSL_CTX_get_cert_store(ssl_ctx);
1527 if (cs == NULL) {
1528 tls_show_errors(MSG_INFO, __func__, "Failed to get "
1529 "certificate store when enabling "
1530 "check_crl");
1531 return -1;
1532 }
1533 flags = X509_V_FLAG_CRL_CHECK;
1534 if (check_crl == 2)
1535 flags |= X509_V_FLAG_CRL_CHECK_ALL;
1536 X509_STORE_set_flags(cs, flags);
1537 }
1538 return 0;
1539}
1540
1541
1542static int tls_connection_set_subject_match(struct tls_connection *conn,
1543 const char *subject_match,
1544 const char *altsubject_match)
1545{
1546 os_free(conn->subject_match);
1547 conn->subject_match = NULL;
1548 if (subject_match) {
1549 conn->subject_match = os_strdup(subject_match);
1550 if (conn->subject_match == NULL)
1551 return -1;
1552 }
1553
1554 os_free(conn->altsubject_match);
1555 conn->altsubject_match = NULL;
1556 if (altsubject_match) {
1557 conn->altsubject_match = os_strdup(altsubject_match);
1558 if (conn->altsubject_match == NULL)
1559 return -1;
1560 }
1561
1562 return 0;
1563}
1564
1565
1566int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn,
1567 int verify_peer)
1568{
bf206cad
JM		 1569 static int counter = 0;
1570
6fc6879b
JM		 1571 if (conn == NULL)
1572 return -1;
1573
1574 if (verify_peer) {
00468b46 1575 conn->ca_cert_verify = 1;
6fc6879b
JM		 1576 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER |
1577 SSL_VERIFY_FAIL_IF_NO_PEER_CERT |
1578 SSL_VERIFY_CLIENT_ONCE, tls_verify_cb);
1579 } else {
00468b46 1580 conn->ca_cert_verify = 0;
6fc6879b
JM		 1581 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
1582 }
1583
1584 SSL_set_accept_state(conn->ssl);
1585
bf206cad
JM		 1586 /*
1587 * Set session id context in order to avoid fatal errors when client
1588 * tries to resume a session. However, set the context to a unique
1589 * value in order to effectively disable session resumption for now
1590 * since not all areas of the server code are ready for it (e.g.,
1591 * EAP-TTLS needs special handling for Phase 2 after abbreviated TLS
1592 * handshake).
1593 */
1594 counter++;
1595 SSL_set_session_id_context(conn->ssl,
1596 (const unsigned char *) &counter,
1597 sizeof(counter));
1598
6fc6879b
JM		 1599 return 0;
1600}
1601
1602
1603static int tls_connection_client_cert(struct tls_connection *conn,
1604 const char *client_cert,
1605 const u8 *client_cert_blob,
1606 size_t client_cert_blob_len)
1607{
1608 if (client_cert == NULL && client_cert_blob == NULL)
1609 return 0;
1610
1611 if (client_cert_blob &&
1612 SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob,
1613 client_cert_blob_len) == 1) {
1614 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> "
1615 "OK");
1616 return 0;
1617 } else if (client_cert_blob) {
1618 tls_show_errors(MSG_DEBUG, __func__,
1619 "SSL_use_certificate_ASN1 failed");
1620 }
1621
1622 if (client_cert == NULL)
1623 return -1;
1624
2a0cd067
DS		 1625#ifdef ANDROID
1626 if (os_strncmp("keystore://", client_cert, 11) == 0) {
1627 BIO *bio = BIO_from_keystore(&client_cert[11]);
1628 X509 *x509 = NULL;
1629 int ret = -1;
1630 if (bio) {
1631 x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL);
1632 BIO_free(bio);
1633 }
1634 if (x509) {
1635 if (SSL_use_certificate(conn->ssl, x509) == 1)
1636 ret = 0;
1637 X509_free(x509);
1638 }
1639 return ret;
1640 }
1641#endif /* ANDROID */
1642
6fc6879b
JM		 1643#ifndef OPENSSL_NO_STDIO
1644 if (SSL_use_certificate_file(conn->ssl, client_cert,
1645 SSL_FILETYPE_ASN1) == 1) {
1646 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)"
1647 " --> OK");
1648 return 0;
6fc6879b
JM		 1649 }
1650
1651 if (SSL_use_certificate_file(conn->ssl, client_cert,
1652 SSL_FILETYPE_PEM) == 1) {
effab86f 1653 ERR_clear_error();
6fc6879b
JM		 1654 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)"
1655 " --> OK");
1656 return 0;
6fc6879b 1657 }
effab86f
JM		 1658
1659 tls_show_errors(MSG_DEBUG, __func__,
1660 "SSL_use_certificate_file failed");
6fc6879b
JM		 1661#else /* OPENSSL_NO_STDIO */
1662 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1663#endif /* OPENSSL_NO_STDIO */
1664
1665 return -1;
1666}
1667
1668
1669static int tls_global_client_cert(SSL_CTX *ssl_ctx, const char *client_cert)
1670{
1671#ifndef OPENSSL_NO_STDIO
1672 if (client_cert == NULL)
1673 return 0;
1674
1675 if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1676 SSL_FILETYPE_ASN1) != 1 &&
65897747 1677 SSL_CTX_use_certificate_chain_file(ssl_ctx, client_cert) != 1 &&
6fc6879b
JM		 1678 SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1679 SSL_FILETYPE_PEM) != 1) {
1680 tls_show_errors(MSG_INFO, __func__,
1681 "Failed to load client certificate");
1682 return -1;
1683 }
1684 return 0;
1685#else /* OPENSSL_NO_STDIO */
1686 if (client_cert == NULL)
1687 return 0;
1688 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1689 return -1;
1690#endif /* OPENSSL_NO_STDIO */
1691}
1692
1693
1694static int tls_passwd_cb(char *buf, int size, int rwflag, void *password)
1695{
1696 if (password == NULL) {
1697 return 0;
1698 }
1699 os_strlcpy(buf, (char *) password, size);
1700 return os_strlen(buf);
1701}
1702
1703
1704#ifdef PKCS12_FUNCS
1705static int tls_parse_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, PKCS12 *p12,
1706 const char *passwd)
1707{
1708 EVP_PKEY *pkey;
1709 X509 *cert;
1710 STACK_OF(X509) *certs;
1711 int res = 0;
1712 char buf[256];
1713
1714 pkey = NULL;
1715 cert = NULL;
1716 certs = NULL;
1717 if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) {
1718 tls_show_errors(MSG_DEBUG, __func__,
1719 "Failed to parse PKCS12 file");
1720 PKCS12_free(p12);
1721 return -1;
1722 }
1723 wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data");
1724
1725 if (cert) {
1726 X509_NAME_oneline(X509_get_subject_name(cert), buf,
1727 sizeof(buf));
1728 wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: "
1729 "subject='%s'", buf);
1730 if (ssl) {
1731 if (SSL_use_certificate(ssl, cert) != 1)
1732 res = -1;
1733 } else {
1734 if (SSL_CTX_use_certificate(ssl_ctx, cert) != 1)
1735 res = -1;
1736 }
1737 X509_free(cert);
1738 }
1739
1740 if (pkey) {
1741 wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12");
1742 if (ssl) {
1743 if (SSL_use_PrivateKey(ssl, pkey) != 1)
1744 res = -1;
1745 } else {
1746 if (SSL_CTX_use_PrivateKey(ssl_ctx, pkey) != 1)
1747 res = -1;
1748 }
1749 EVP_PKEY_free(pkey);
1750 }
1751
1752 if (certs) {
1753 while ((cert = sk_X509_pop(certs)) != NULL) {
1754 X509_NAME_oneline(X509_get_subject_name(cert), buf,
1755 sizeof(buf));
1756 wpa_printf(MSG_DEBUG, "TLS: additional certificate"
1757 " from PKCS12: subject='%s'", buf);
1758 /*
1759 * There is no SSL equivalent for the chain cert - so
1760 * always add it to the context...
1761 */
1762 if (SSL_CTX_add_extra_chain_cert(ssl_ctx, cert) != 1) {
1763 res = -1;
1764 break;
1765 }
1766 }
1767 sk_X509_free(certs);
1768 }
1769
1770 PKCS12_free(p12);
1771
1772 if (res < 0)
1773 tls_get_errors(ssl_ctx);
1774
1775 return res;
1776}
1777#endif /* PKCS12_FUNCS */
1778
1779
1780static int tls_read_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, const char *private_key,
1781 const char *passwd)
1782{
1783#ifdef PKCS12_FUNCS
1784 FILE *f;
1785 PKCS12 *p12;
1786
1787 f = fopen(private_key, "rb");
1788 if (f == NULL)
1789 return -1;
1790
1791 p12 = d2i_PKCS12_fp(f, NULL);
1792 fclose(f);
1793
1794 if (p12 == NULL) {
1795 tls_show_errors(MSG_INFO, __func__,
1796 "Failed to use PKCS#12 file");
1797 return -1;
1798 }
1799
1800 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
1801
1802#else /* PKCS12_FUNCS */
1803 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read "
1804 "p12/pfx files");
1805 return -1;
1806#endif /* PKCS12_FUNCS */
1807}
1808
1809
1810static int tls_read_pkcs12_blob(SSL_CTX *ssl_ctx, SSL *ssl,
1811 const u8 *blob, size_t len, const char *passwd)
1812{
1813#ifdef PKCS12_FUNCS
1814 PKCS12 *p12;
1815
1816 p12 = d2i_PKCS12(NULL, (OPENSSL_d2i_TYPE) &blob, len);
1817 if (p12 == NULL) {
1818 tls_show_errors(MSG_INFO, __func__,
1819 "Failed to use PKCS#12 blob");
1820 return -1;
1821 }
1822
1823 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
1824
1825#else /* PKCS12_FUNCS */
1826 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse "
1827 "p12/pfx blobs");
1828 return -1;
1829#endif /* PKCS12_FUNCS */
1830}
1831
1832
e572cb63 1833#ifndef OPENSSL_NO_ENGINE
e59c91af
DS		 1834static int tls_engine_get_cert(struct tls_connection *conn,
1835 const char *cert_id,
1836 X509 **cert)
1837{
e59c91af
DS		 1838 /* this runs after the private key is loaded so no PIN is required */
1839 struct {
1840 const char *cert_id;
1841 X509 *cert;
1842 } params;
1843 params.cert_id = cert_id;
1844 params.cert = NULL;
1845
1846 if (!ENGINE_ctrl_cmd(conn->engine, "LOAD_CERT_CTRL",
1847 0, &params, NULL, 1)) {
1848 wpa_printf(MSG_ERROR, "ENGINE: cannot load client cert with id"
1849 " '%s' [%s]", cert_id,
1850 ERR_error_string(ERR_get_error(), NULL));
1851 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
1852 }
1853 if (!params.cert) {
1854 wpa_printf(MSG_ERROR, "ENGINE: did not properly cert with id"
1855 " '%s'", cert_id);
1856 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
1857 }
1858 *cert = params.cert;
1859 return 0;
e59c91af 1860}
e572cb63 1861#endif /* OPENSSL_NO_ENGINE */
e59c91af
DS		 1862
1863
1864static int tls_connection_engine_client_cert(struct tls_connection *conn,
1865 const char *cert_id)
1866{
1867#ifndef OPENSSL_NO_ENGINE
1868 X509 *cert;
1869
1870 if (tls_engine_get_cert(conn, cert_id, &cert))
1871 return -1;
1872
1873 if (!SSL_use_certificate(conn->ssl, cert)) {
1874 tls_show_errors(MSG_ERROR, __func__,
1875 "SSL_use_certificate failed");
1876 X509_free(cert);
1877 return -1;
1878 }
1879 X509_free(cert);
1880 wpa_printf(MSG_DEBUG, "ENGINE: SSL_use_certificate --> "
1881 "OK");
1882 return 0;
1883
1884#else /* OPENSSL_NO_ENGINE */
1885 return -1;
1886#endif /* OPENSSL_NO_ENGINE */
1887}
1888
1889
1890static int tls_connection_engine_ca_cert(void *_ssl_ctx,
1891 struct tls_connection *conn,
1892 const char *ca_cert_id)
1893{
1894#ifndef OPENSSL_NO_ENGINE
1895 X509 *cert;
1896 SSL_CTX *ssl_ctx = _ssl_ctx;
1897
1898 if (tls_engine_get_cert(conn, ca_cert_id, &cert))
1899 return -1;
1900
1901 /* start off the same as tls_connection_ca_cert */
1902 X509_STORE_free(ssl_ctx->cert_store);
1903 ssl_ctx->cert_store = X509_STORE_new();
1904 if (ssl_ctx->cert_store == NULL) {
1905 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
1906 "certificate store", __func__);
1907 X509_free(cert);
1908 return -1;
1909 }
1910 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
1911 unsigned long err = ERR_peek_error();
1912 tls_show_errors(MSG_WARNING, __func__,
1913 "Failed to add CA certificate from engine "
1914 "to certificate store");
1915 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1916 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1917 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring cert"
1918 " already in hash table error",
1919 __func__);
1920 } else {
1921 X509_free(cert);
1922 return -1;
1923 }
1924 }
1925 X509_free(cert);
1926 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added CA certificate from engine "
1927 "to certificate store", __func__);
1928 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
d8858cad
CW		 1929 conn->ca_cert_verify = 1;
1930
e59c91af
DS		 1931 return 0;
1932
1933#else /* OPENSSL_NO_ENGINE */
1934 return -1;
1935#endif /* OPENSSL_NO_ENGINE */
1936}
1937
1938
6fc6879b
JM		 1939static int tls_connection_engine_private_key(struct tls_connection *conn)
1940{
1941#ifndef OPENSSL_NO_ENGINE
1942 if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) {
1943 tls_show_errors(MSG_ERROR, __func__,
1944 "ENGINE: cannot use private key for TLS");
1945 return -1;
1946 }
1947 if (!SSL_check_private_key(conn->ssl)) {
1948 tls_show_errors(MSG_INFO, __func__,
1949 "Private key failed verification");
1950 return -1;
1951 }
1952 return 0;
1953#else /* OPENSSL_NO_ENGINE */
1954 wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but "
1955 "engine support was not compiled in");
1956 return -1;
1957#endif /* OPENSSL_NO_ENGINE */
1958}
1959
1960
1961static int tls_connection_private_key(void *_ssl_ctx,
1962 struct tls_connection *conn,
1963 const char *private_key,
1964 const char *private_key_passwd,
1965 const u8 *private_key_blob,
1966 size_t private_key_blob_len)
1967{
1968 SSL_CTX *ssl_ctx = _ssl_ctx;
1969 char *passwd;
1970 int ok;
1971
1972 if (private_key == NULL && private_key_blob == NULL)
1973 return 0;
1974
1975 if (private_key_passwd) {
1976 passwd = os_strdup(private_key_passwd);
1977 if (passwd == NULL)
1978 return -1;
1979 } else
1980 passwd = NULL;
1981
1982 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
1983 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
1984
1985 ok = 0;
1986 while (private_key_blob) {
1987 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl,
1988 (u8 *) private_key_blob,
1989 private_key_blob_len) == 1) {
1990 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
1991 "ASN1(EVP_PKEY_RSA) --> OK");
1992 ok = 1;
1993 break;
6fc6879b
JM		 1994 }
1995
1996 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl,
1997 (u8 *) private_key_blob,
1998 private_key_blob_len) == 1) {
1999 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
2000 "ASN1(EVP_PKEY_DSA) --> OK");
2001 ok = 1;
2002 break;
6fc6879b
JM		 2003 }
2004
2005 if (SSL_use_RSAPrivateKey_ASN1(conn->ssl,
2006 (u8 *) private_key_blob,
2007 private_key_blob_len) == 1) {
2008 wpa_printf(MSG_DEBUG, "OpenSSL: "
2009 "SSL_use_RSAPrivateKey_ASN1 --> OK");
2010 ok = 1;
2011 break;
6fc6879b
JM		 2012 }
2013
2014 if (tls_read_pkcs12_blob(ssl_ctx, conn->ssl, private_key_blob,
2015 private_key_blob_len, passwd) == 0) {
2016 wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> "
2017 "OK");
2018 ok = 1;
2019 break;
2020 }
2021
2022 break;
2023 }
2024
2a0cd067
DS		 2025#ifdef ANDROID
2026 if (!ok && private_key &&
2027 os_strncmp("keystore://", private_key, 11) == 0) {
2028 BIO *bio = BIO_from_keystore(&private_key[11]);
2029 EVP_PKEY *pkey = NULL;
2030 if (bio) {
2031 pkey = PEM_read_bio_PrivateKey(bio, NULL, NULL, NULL);
2032 BIO_free(bio);
2033 }
2034 if (pkey) {
2035 if (SSL_use_PrivateKey(conn->ssl, pkey) == 1) {
2036 wpa_printf(MSG_DEBUG, "OpenSSL: Private key "
2037 "from keystore");
2038 ok = 1;
2039 }
2040 EVP_PKEY_free(pkey);
2041 }
2042 }
2043#endif /* ANDROID */
2044
6fc6879b
JM		 2045 while (!ok && private_key) {
2046#ifndef OPENSSL_NO_STDIO
2047 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
2048 SSL_FILETYPE_ASN1) == 1) {
2049 wpa_printf(MSG_DEBUG, "OpenSSL: "
2050 "SSL_use_PrivateKey_File (DER) --> OK");
2051 ok = 1;
2052 break;
6fc6879b
JM		 2053 }
2054
2055 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
2056 SSL_FILETYPE_PEM) == 1) {
2057 wpa_printf(MSG_DEBUG, "OpenSSL: "
2058 "SSL_use_PrivateKey_File (PEM) --> OK");
2059 ok = 1;
2060 break;
6fc6879b
JM		 2061 }
2062#else /* OPENSSL_NO_STDIO */
2063 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
2064 __func__);
2065#endif /* OPENSSL_NO_STDIO */
2066
2067 if (tls_read_pkcs12(ssl_ctx, conn->ssl, private_key, passwd)
2068 == 0) {
2069 wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file "
2070 "--> OK");
2071 ok = 1;
2072 break;
2073 }
2074
2075 if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) {
2076 wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to "
2077 "access certificate store --> OK");
2078 ok = 1;
2079 break;
2080 }
2081
2082 break;
2083 }
2084
2085 if (!ok) {
effab86f
JM		 2086 tls_show_errors(MSG_INFO, __func__,
2087 "Failed to load private key");
6fc6879b 2088 os_free(passwd);
6fc6879b
JM		 2089 return -1;
2090 }
2091 ERR_clear_error();
2092 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
2093 os_free(passwd);
55651a4b 2094
6fc6879b
JM		 2095 if (!SSL_check_private_key(conn->ssl)) {
2096 tls_show_errors(MSG_INFO, __func__, "Private key failed "
2097 "verification");
2098 return -1;
2099 }
2100
2101 wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully");
2102 return 0;
2103}
2104
2105
2106static int tls_global_private_key(SSL_CTX *ssl_ctx, const char *private_key,
2107 const char *private_key_passwd)
2108{
2109 char *passwd;
2110
2111 if (private_key == NULL)
2112 return 0;
2113
2114 if (private_key_passwd) {
2115 passwd = os_strdup(private_key_passwd);
2116 if (passwd == NULL)
2117 return -1;
2118 } else
2119 passwd = NULL;
2120
2121 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
2122 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
2123 if (
2124#ifndef OPENSSL_NO_STDIO
2125 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
2126 SSL_FILETYPE_ASN1) != 1 &&
2127 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
2128 SSL_FILETYPE_PEM) != 1 &&
2129#endif /* OPENSSL_NO_STDIO */
2130 tls_read_pkcs12(ssl_ctx, NULL, private_key, passwd)) {
2131 tls_show_errors(MSG_INFO, __func__,
2132 "Failed to load private key");
2133 os_free(passwd);
2134 ERR_clear_error();
2135 return -1;
2136 }
2137 os_free(passwd);
2138 ERR_clear_error();
2139 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
55651a4b 2140
6fc6879b
JM		 2141 if (!SSL_CTX_check_private_key(ssl_ctx)) {
2142 tls_show_errors(MSG_INFO, __func__,
2143 "Private key failed verification");
2144 return -1;
2145 }
2146
2147 return 0;
2148}
2149
2150
2151static int tls_connection_dh(struct tls_connection *conn, const char *dh_file)
2152{
2153#ifdef OPENSSL_NO_DH
2154 if (dh_file == NULL)
2155 return 0;
2156 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
2157 "dh_file specified");
2158 return -1;
2159#else /* OPENSSL_NO_DH */
2160 DH *dh;
2161 BIO *bio;
2162
2163 /* TODO: add support for dh_blob */
2164 if (dh_file == NULL)
2165 return 0;
2166 if (conn == NULL)
2167 return -1;
2168
2169 bio = BIO_new_file(dh_file, "r");
2170 if (bio == NULL) {
2171 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
2172 dh_file, ERR_error_string(ERR_get_error(), NULL));
2173 return -1;
2174 }
2175 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
2176 BIO_free(bio);
2177#ifndef OPENSSL_NO_DSA
2178 while (dh == NULL) {
2179 DSA *dsa;
2180 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
2181 " trying to parse as DSA params", dh_file,
2182 ERR_error_string(ERR_get_error(), NULL));
2183 bio = BIO_new_file(dh_file, "r");
2184 if (bio == NULL)
2185 break;
2186 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
2187 BIO_free(bio);
2188 if (!dsa) {
2189 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
2190 "'%s': %s", dh_file,
2191 ERR_error_string(ERR_get_error(), NULL));
2192 break;
2193 }
2194
2195 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
2196 dh = DSA_dup_DH(dsa);
2197 DSA_free(dsa);
2198 if (dh == NULL) {
2199 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
2200 "params into DH params");
2201 break;
2202 }
2203 break;
2204 }
2205#endif /* !OPENSSL_NO_DSA */
2206 if (dh == NULL) {
2207 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
2208 "'%s'", dh_file);
2209 return -1;
2210 }
2211
2212 if (SSL_set_tmp_dh(conn->ssl, dh) != 1) {
2213 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
2214 "%s", dh_file,
2215 ERR_error_string(ERR_get_error(), NULL));
2216 DH_free(dh);
2217 return -1;
2218 }
2219 DH_free(dh);
2220 return 0;
2221#endif /* OPENSSL_NO_DH */
2222}
2223
2224
2225static int tls_global_dh(SSL_CTX *ssl_ctx, const char *dh_file)
2226{
2227#ifdef OPENSSL_NO_DH
2228 if (dh_file == NULL)
2229 return 0;
2230 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
2231 "dh_file specified");
2232 return -1;
2233#else /* OPENSSL_NO_DH */
2234 DH *dh;
2235 BIO *bio;
2236
2237 /* TODO: add support for dh_blob */
2238 if (dh_file == NULL)
2239 return 0;
2240 if (ssl_ctx == NULL)
2241 return -1;
2242
2243 bio = BIO_new_file(dh_file, "r");
2244 if (bio == NULL) {
2245 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
2246 dh_file, ERR_error_string(ERR_get_error(), NULL));
2247 return -1;
2248 }
2249 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
2250 BIO_free(bio);
2251#ifndef OPENSSL_NO_DSA
2252 while (dh == NULL) {
2253 DSA *dsa;
2254 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
2255 " trying to parse as DSA params", dh_file,
2256 ERR_error_string(ERR_get_error(), NULL));
2257 bio = BIO_new_file(dh_file, "r");
2258 if (bio == NULL)
2259 break;
2260 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
2261 BIO_free(bio);
2262 if (!dsa) {
2263 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
2264 "'%s': %s", dh_file,
2265 ERR_error_string(ERR_get_error(), NULL));
2266 break;
2267 }
2268
2269 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
2270 dh = DSA_dup_DH(dsa);
2271 DSA_free(dsa);
2272 if (dh == NULL) {
2273 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
2274 "params into DH params");
2275 break;
2276 }
2277 break;
2278 }
2279#endif /* !OPENSSL_NO_DSA */
2280 if (dh == NULL) {
2281 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
2282 "'%s'", dh_file);
2283 return -1;
2284 }
2285
2286 if (SSL_CTX_set_tmp_dh(ssl_ctx, dh) != 1) {
2287 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
2288 "%s", dh_file,
2289 ERR_error_string(ERR_get_error(), NULL));
2290 DH_free(dh);
2291 return -1;
2292 }
2293 DH_free(dh);
2294 return 0;
2295#endif /* OPENSSL_NO_DH */
2296}
2297
2298
2299int tls_connection_get_keys(void *ssl_ctx, struct tls_connection *conn,
2300 struct tls_keys *keys)
2301{
2302 SSL *ssl;
2303
2304 if (conn == NULL || keys == NULL)
2305 return -1;
2306 ssl = conn->ssl;
2307 if (ssl == NULL || ssl->s3 == NULL || ssl->session == NULL)
2308 return -1;
2309
2310 os_memset(keys, 0, sizeof(*keys));
2311 keys->master_key = ssl->session->master_key;
2312 keys->master_key_len = ssl->session->master_key_length;
2313 keys->client_random = ssl->s3->client_random;
2314 keys->client_random_len = SSL3_RANDOM_SIZE;
2315 keys->server_random = ssl->s3->server_random;
2316 keys->server_random_len = SSL3_RANDOM_SIZE;
2317
2318 return 0;
2319}
2320
2321
2322int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
2323 const char *label, int server_random_first,
2324 u8 *out, size_t out_len)
2325{
2326 return -1;
2327}
2328
2329
81c85c06
JM		 2330static struct wpabuf *
2331openssl_handshake(struct tls_connection *conn, const struct wpabuf *in_data,
2332 int server)
6fc6879b
JM		 2333{
2334 int res;
81c85c06 2335 struct wpabuf *out_data;
6fc6879b
JM		 2336
2337 /*
2338 * Give TLS handshake data from the server (if available) to OpenSSL
2339 * for processing.
2340 */
2341 if (in_data &&
81c85c06
JM		 2342 BIO_write(conn->ssl_in, wpabuf_head(in_data), wpabuf_len(in_data))
2343 < 0) {
6fc6879b
JM		 2344 tls_show_errors(MSG_INFO, __func__,
2345 "Handshake failed - BIO_write");
2346 return NULL;
2347 }
2348
2349 /* Initiate TLS handshake or continue the existing handshake */
81c85c06
JM		 2350 if (server)
2351 res = SSL_accept(conn->ssl);
2352 else
2353 res = SSL_connect(conn->ssl);
6fc6879b
JM		 2354 if (res != 1) {
2355 int err = SSL_get_error(conn->ssl, res);
2356 if (err == SSL_ERROR_WANT_READ)
2357 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want "
2358 "more data");
2359 else if (err == SSL_ERROR_WANT_WRITE)
2360 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to "
2361 "write");
2362 else {
2363 tls_show_errors(MSG_INFO, __func__, "SSL_connect");
2364 conn->failed++;
2365 }
2366 }
2367
2368 /* Get the TLS handshake data to be sent to the server */
2369 res = BIO_ctrl_pending(conn->ssl_out);
2370 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
81c85c06 2371 out_data = wpabuf_alloc(res);
6fc6879b
JM		 2372 if (out_data == NULL) {
2373 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
2374 "handshake output (%d bytes)", res);
2375 if (BIO_reset(conn->ssl_out) < 0) {
2376 tls_show_errors(MSG_INFO, __func__,
2377 "BIO_reset failed");
2378 }
6fc6879b
JM		 2379 return NULL;
2380 }
81c85c06
JM		 2381 res = res == 0 ? 0 : BIO_read(conn->ssl_out, wpabuf_mhead(out_data),
2382 res);
6fc6879b
JM		 2383 if (res < 0) {
2384 tls_show_errors(MSG_INFO, __func__,
2385 "Handshake failed - BIO_read");
2386 if (BIO_reset(conn->ssl_out) < 0) {
2387 tls_show_errors(MSG_INFO, __func__,
2388 "BIO_reset failed");
2389 }
81c85c06 2390 wpabuf_free(out_data);
6fc6879b
JM		 2391 return NULL;
2392 }
81c85c06 2393 wpabuf_put(out_data, res);
6fc6879b
JM		 2394
2395 return out_data;
2396}
2397
2398
81c85c06
JM		 2399static struct wpabuf *
2400openssl_get_appl_data(struct tls_connection *conn, size_t max_len)
6fc6879b 2401{
81c85c06 2402 struct wpabuf *appl_data;
6fc6879b 2403 int res;
6fc6879b 2404
81c85c06
JM		 2405 appl_data = wpabuf_alloc(max_len + 100);
2406 if (appl_data == NULL)
6fc6879b 2407 return NULL;
6fc6879b 2408
81c85c06
JM		 2409 res = SSL_read(conn->ssl, wpabuf_mhead(appl_data),
2410 wpabuf_size(appl_data));
2411 if (res < 0) {
bf206cad 2412 int err = SSL_get_error(conn->ssl, res);
81c85c06
JM		 2413 if (err == SSL_ERROR_WANT_READ ||
2414 err == SSL_ERROR_WANT_WRITE) {
2415 wpa_printf(MSG_DEBUG, "SSL: No Application Data "
2416 "included");
2417 } else {
6fc6879b 2418 tls_show_errors(MSG_INFO, __func__,
81c85c06
JM		 2419 "Failed to read possible "
2420 "Application Data");
6fc6879b 2421 }
81c85c06 2422 wpabuf_free(appl_data);
6fc6879b
JM		 2423 return NULL;
2424 }
81c85c06
JM		 2425
2426 wpabuf_put(appl_data, res);
2427 wpa_hexdump_buf_key(MSG_MSGDUMP, "SSL: Application Data in Finished "
2428 "message", appl_data);
2429
2430 return appl_data;
2431}
2432
2433
2434static struct wpabuf *
2435openssl_connection_handshake(struct tls_connection *conn,
2436 const struct wpabuf *in_data,
2437 struct wpabuf **appl_data, int server)
2438{
2439 struct wpabuf *out_data;
2440
2441 if (appl_data)
2442 *appl_data = NULL;
2443
2444 out_data = openssl_handshake(conn, in_data, server);
2445 if (out_data == NULL)
6fc6879b 2446 return NULL;
81c85c06
JM		 2447
2448 if (SSL_is_init_finished(conn->ssl) && appl_data && in_data)
2449 *appl_data = openssl_get_appl_data(conn, wpabuf_len(in_data));
2450
6fc6879b
JM		 2451 return out_data;
2452}
2453
2454
81c85c06
JM		 2455struct wpabuf *
2456tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn,
2457 const struct wpabuf *in_data,
2458 struct wpabuf **appl_data)
2459{
2460 return openssl_connection_handshake(conn, in_data, appl_data, 0);
2461}
2462
2463
2464struct wpabuf * tls_connection_server_handshake(void *tls_ctx,
2465 struct tls_connection *conn,
2466 const struct wpabuf *in_data,
2467 struct wpabuf **appl_data)
2468{
2469 return openssl_connection_handshake(conn, in_data, appl_data, 1);
2470}
2471
2472
2473struct wpabuf * tls_connection_encrypt(void *tls_ctx,
2474 struct tls_connection *conn,
2475 const struct wpabuf *in_data)
6fc6879b
JM		 2476{
2477 int res;
81c85c06 2478 struct wpabuf *buf;
6fc6879b
JM		 2479
2480 if (conn == NULL)
81c85c06 2481 return NULL;
6fc6879b
JM		 2482
2483 /* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */
2484 if ((res = BIO_reset(conn->ssl_in)) < 0 ||
2485 (res = BIO_reset(conn->ssl_out)) < 0) {
2486 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
81c85c06 2487 return NULL;
6fc6879b 2488 }
81c85c06 2489 res = SSL_write(conn->ssl, wpabuf_head(in_data), wpabuf_len(in_data));
6fc6879b
JM		 2490 if (res < 0) {
2491 tls_show_errors(MSG_INFO, __func__,
2492 "Encryption failed - SSL_write");
81c85c06 2493 return NULL;
6fc6879b
JM		 2494 }
2495
2496 /* Read encrypted data to be sent to the server */
81c85c06
JM		 2497 buf = wpabuf_alloc(wpabuf_len(in_data) + 300);
2498 if (buf == NULL)
2499 return NULL;
2500 res = BIO_read(conn->ssl_out, wpabuf_mhead(buf), wpabuf_size(buf));
6fc6879b
JM		 2501 if (res < 0) {
2502 tls_show_errors(MSG_INFO, __func__,
2503 "Encryption failed - BIO_read");
81c85c06
JM		 2504 wpabuf_free(buf);
2505 return NULL;
6fc6879b 2506 }
81c85c06 2507 wpabuf_put(buf, res);
6fc6879b 2508
81c85c06 2509 return buf;
6fc6879b
JM		 2510}
2511
2512
81c85c06
JM		 2513struct wpabuf * tls_connection_decrypt(void *tls_ctx,
2514 struct tls_connection *conn,
2515 const struct wpabuf *in_data)
6fc6879b
JM		 2516{
2517 int res;
81c85c06 2518 struct wpabuf *buf;
6fc6879b
JM		 2519
2520 /* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */
81c85c06
JM		 2521 res = BIO_write(conn->ssl_in, wpabuf_head(in_data),
2522 wpabuf_len(in_data));
6fc6879b
JM		 2523 if (res < 0) {
2524 tls_show_errors(MSG_INFO, __func__,
2525 "Decryption failed - BIO_write");
81c85c06 2526 return NULL;
6fc6879b
JM		 2527 }
2528 if (BIO_reset(conn->ssl_out) < 0) {
2529 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
81c85c06 2530 return NULL;
6fc6879b
JM		 2531 }
2532
2533 /* Read decrypted data for further processing */
81c85c06
JM		 2534 /*
2535 * Even though we try to disable TLS compression, it is possible that
2536 * this cannot be done with all TLS libraries. Add extra buffer space
2537 * to handle the possibility of the decrypted data being longer than
2538 * input data.
2539 */
2540 buf = wpabuf_alloc((wpabuf_len(in_data) + 500) * 3);
2541 if (buf == NULL)
2542 return NULL;
2543 res = SSL_read(conn->ssl, wpabuf_mhead(buf), wpabuf_size(buf));
6fc6879b
JM		 2544 if (res < 0) {
2545 tls_show_errors(MSG_INFO, __func__,
2546 "Decryption failed - SSL_read");
a86a7316 2547 wpabuf_free(buf);
81c85c06 2548 return NULL;
6fc6879b 2549 }
81c85c06 2550 wpabuf_put(buf, res);
6fc6879b 2551
81c85c06 2552 return buf;
6fc6879b
JM		 2553}
2554
2555
2556int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn)
2557{
2558 return conn ? conn->ssl->hit : 0;
2559}
2560
2561
2562int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
2563 u8 *ciphers)
2564{
2565 char buf[100], *pos, *end;
2566 u8 *c;
2567 int ret;
2568
2569 if (conn == NULL || conn->ssl == NULL || ciphers == NULL)
2570 return -1;
2571
2572 buf[0] = '\0';
2573 pos = buf;
2574 end = pos + sizeof(buf);
2575
2576 c = ciphers;
2577 while (*c != TLS_CIPHER_NONE) {
2578 const char *suite;
2579
2580 switch (*c) {
2581 case TLS_CIPHER_RC4_SHA:
2582 suite = "RC4-SHA";
2583 break;
2584 case TLS_CIPHER_AES128_SHA:
2585 suite = "AES128-SHA";
2586 break;
2587 case TLS_CIPHER_RSA_DHE_AES128_SHA:
2588 suite = "DHE-RSA-AES128-SHA";
2589 break;
2590 case TLS_CIPHER_ANON_DH_AES128_SHA:
2591 suite = "ADH-AES128-SHA";
2592 break;
2593 default:
2594 wpa_printf(MSG_DEBUG, "TLS: Unsupported "
2595 "cipher selection: %d", *c);
2596 return -1;
2597 }
2598 ret = os_snprintf(pos, end - pos, ":%s", suite);
2599 if (ret < 0 || ret >= end - pos)
2600 break;
2601 pos += ret;
2602
2603 c++;
2604 }
2605
2606 wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1);
2607
2608 if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) {
2609 tls_show_errors(MSG_INFO, __func__,
2610 "Cipher suite configuration failed");
2611 return -1;
2612 }
2613
2614 return 0;
2615}
2616
2617
2618int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn,
2619 char *buf, size_t buflen)
2620{
2621 const char *name;
2622 if (conn == NULL || conn->ssl == NULL)
2623 return -1;
2624
2625 name = SSL_get_cipher(conn->ssl);
2626 if (name == NULL)
2627 return -1;
2628
2629 os_strlcpy(buf, name, buflen);
2630 return 0;
2631}
2632
2633
2634int tls_connection_enable_workaround(void *ssl_ctx,
2635 struct tls_connection *conn)
2636{
2637 SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
2638
2639 return 0;
2640}
2641
2642
1e5839e0 2643#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
6fc6879b
JM		 2644/* ClientHello TLS extensions require a patch to openssl, so this function is
2645 * commented out unless explicitly needed for EAP-FAST in order to be able to
2646 * build this file with unmodified openssl. */
2647int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn,
2648 int ext_type, const u8 *data,
2649 size_t data_len)
2650{
0cf03892 2651 if (conn == NULL || conn->ssl == NULL || ext_type != 35)
6fc6879b
JM		 2652 return -1;
2653
0cf03892
JM		 2654#ifdef CONFIG_OPENSSL_TICKET_OVERRIDE
2655 if (SSL_set_session_ticket_ext(conn->ssl, (void *) data,
2656 data_len) != 1)
2657 return -1;
2658#else /* CONFIG_OPENSSL_TICKET_OVERRIDE */
6fc6879b
JM		 2659 if (SSL_set_hello_extension(conn->ssl, ext_type, (void *) data,
2660 data_len) != 1)
2661 return -1;
0cf03892 2662#endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */
6fc6879b
JM		 2663
2664 return 0;
2665}
1e5839e0 2666#endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
6fc6879b
JM		 2667
2668
2669int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn)
2670{
2671 if (conn == NULL)
2672 return -1;
2673 return conn->failed;
2674}
2675
2676
2677int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn)
2678{
2679 if (conn == NULL)
2680 return -1;
2681 return conn->read_alerts;
2682}
2683
2684
2685int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn)
2686{
2687 if (conn == NULL)
2688 return -1;
2689 return conn->write_alerts;
2690}
2691
2692
2693int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
2694 const struct tls_connection_params *params)
2695{
2696 int ret;
2697 unsigned long err;
2698
2699 if (conn == NULL)
2700 return -1;
2701
2702 while ((err = ERR_get_error())) {
2703 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
2704 __func__, ERR_error_string(err, NULL));
2705 }
2706
e59c91af
DS		 2707 if (params->engine) {
2708 wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine");
2709 ret = tls_engine_init(conn, params->engine_id, params->pin,
2710 params->key_id, params->cert_id,
2711 params->ca_cert_id);
2712 if (ret)
2713 return ret;
2714 }
6fc6879b
JM		 2715 if (tls_connection_set_subject_match(conn,
2716 params->subject_match,
2717 params->altsubject_match))
2718 return -1;
e59c91af
DS		 2719
2720 if (params->engine && params->ca_cert_id) {
2721 if (tls_connection_engine_ca_cert(tls_ctx, conn,
2722 params->ca_cert_id))
2723 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
2724 } else if (tls_connection_ca_cert(tls_ctx, conn, params->ca_cert,
2725 params->ca_cert_blob,
2726 params->ca_cert_blob_len,
2727 params->ca_path))
6fc6879b 2728 return -1;
e59c91af
DS		 2729
2730 if (params->engine && params->cert_id) {
2731 if (tls_connection_engine_client_cert(conn, params->cert_id))
2732 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
2733 } else if (tls_connection_client_cert(conn, params->client_cert,
2734 params->client_cert_blob,
2735 params->client_cert_blob_len))
6fc6879b
JM		 2736 return -1;
2737
e59c91af
DS		 2738 if (params->engine && params->key_id) {
2739 wpa_printf(MSG_DEBUG, "TLS: Using private key from engine");
6fc6879b
JM		 2740 if (tls_connection_engine_private_key(conn))
2741 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
2742 } else if (tls_connection_private_key(tls_ctx, conn,
2743 params->private_key,
2744 params->private_key_passwd,
2745 params->private_key_blob,
2746 params->private_key_blob_len)) {
2747 wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'",
2748 params->private_key);
2749 return -1;
2750 }
2751
2752 if (tls_connection_dh(conn, params->dh_file)) {
2753 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
2754 params->dh_file);
2755 return -1;
2756 }
2757
235279e7
JM		 2758 conn->flags = params->flags;
2759
6fc6879b
JM		 2760 tls_get_errors(tls_ctx);
2761
2762 return 0;
2763}
2764
2765
2766int tls_global_set_params(void *tls_ctx,
2767 const struct tls_connection_params *params)
2768{
2769 SSL_CTX *ssl_ctx = tls_ctx;
2770 unsigned long err;
2771
2772 while ((err = ERR_get_error())) {
2773 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
2774 __func__, ERR_error_string(err, NULL));
2775 }
2776
2777 if (tls_global_ca_cert(ssl_ctx, params->ca_cert))
2778 return -1;
2779
2780 if (tls_global_client_cert(ssl_ctx, params->client_cert))
2781 return -1;
2782
2783 if (tls_global_private_key(ssl_ctx, params->private_key,
2784 params->private_key_passwd))
2785 return -1;
2786
2787 if (tls_global_dh(ssl_ctx, params->dh_file)) {
2788 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
2789 params->dh_file);
2790 return -1;
2791 }
2792
2793 return 0;
2794}
2795
2796
2797int tls_connection_get_keyblock_size(void *tls_ctx,
2798 struct tls_connection *conn)
2799{
2800 const EVP_CIPHER *c;
2801 const EVP_MD *h;
2802
2803 if (conn == NULL || conn->ssl == NULL ||
2804 conn->ssl->enc_read_ctx == NULL ||
2805 conn->ssl->enc_read_ctx->cipher == NULL ||
2806 conn->ssl->read_hash == NULL)
2807 return -1;
2808
2809 c = conn->ssl->enc_read_ctx->cipher;
2810#if OPENSSL_VERSION_NUMBER >= 0x00909000L
2811 h = EVP_MD_CTX_md(conn->ssl->read_hash);
2812#else
2813 h = conn->ssl->read_hash;
2814#endif
2815
2816 return 2 * (EVP_CIPHER_key_length(c) +
2817 EVP_MD_size(h) +
2818 EVP_CIPHER_iv_length(c));
2819}
2820
2821
2822unsigned int tls_capabilities(void *tls_ctx)
2823{
2824 return 0;
2825}
2826
2827
1e5839e0 2828#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
6fc6879b
JM		 2829/* Pre-shared secred requires a patch to openssl, so this function is
2830 * commented out unless explicitly needed for EAP-FAST in order to be able to
2831 * build this file with unmodified openssl. */
2832
2833static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
2834 STACK_OF(SSL_CIPHER) *peer_ciphers,
2835 SSL_CIPHER **cipher, void *arg)
2836{
2837 struct tls_connection *conn = arg;
2838 int ret;
2839
2840 if (conn == NULL || conn->session_ticket_cb == NULL)
2841 return 0;
2842
2843 ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx,
2844 conn->session_ticket,
2845 conn->session_ticket_len,
2846 s->s3->client_random,
2847 s->s3->server_random, secret);
2848 os_free(conn->session_ticket);
2849 conn->session_ticket = NULL;
2850
2851 if (ret <= 0)
2852 return 0;
2853
2854 *secret_len = SSL_MAX_MASTER_KEY_LENGTH;
2855 return 1;
2856}
2857
2858
0cf03892
JM		 2859#ifdef CONFIG_OPENSSL_TICKET_OVERRIDE
2860static int tls_session_ticket_ext_cb(SSL *s, const unsigned char *data,
2861 int len, void *arg)
2862{
2863 struct tls_connection *conn = arg;
2864
2865 if (conn == NULL || conn->session_ticket_cb == NULL)
2866 return 0;
2867
2868 wpa_printf(MSG_DEBUG, "OpenSSL: %s: length=%d", __func__, len);
2869
2870 os_free(conn->session_ticket);
2871 conn->session_ticket = NULL;
2872
2873 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
2874 "extension", data, len);
2875
2876 conn->session_ticket = os_malloc(len);
2877 if (conn->session_ticket == NULL)
2878 return 0;
2879
2880 os_memcpy(conn->session_ticket, data, len);
2881 conn->session_ticket_len = len;
2882
2883 return 1;
2884}
2885#else /* CONFIG_OPENSSL_TICKET_OVERRIDE */
6fc6879b
JM		 2886#ifdef SSL_OP_NO_TICKET
2887static void tls_hello_ext_cb(SSL *s, int client_server, int type,
2888 unsigned char *data, int len, void *arg)
2889{
2890 struct tls_connection *conn = arg;
2891
2892 if (conn == NULL || conn->session_ticket_cb == NULL)
2893 return;
2894
2895 wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__,
2896 type, len);
2897
2898 if (type == TLSEXT_TYPE_session_ticket && !client_server) {
2899 os_free(conn->session_ticket);
2900 conn->session_ticket = NULL;
2901
2902 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
2903 "extension", data, len);
2904 conn->session_ticket = os_malloc(len);
2905 if (conn->session_ticket == NULL)
2906 return;
2907
2908 os_memcpy(conn->session_ticket, data, len);
2909 conn->session_ticket_len = len;
2910 }
2911}
2912#else /* SSL_OP_NO_TICKET */
2913static int tls_hello_ext_cb(SSL *s, TLS_EXTENSION *ext, void *arg)
2914{
2915 struct tls_connection *conn = arg;
2916
2917 if (conn == NULL || conn->session_ticket_cb == NULL)
2918 return 0;
2919
2920 wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__,
2921 ext->type, ext->length);
2922
2923 os_free(conn->session_ticket);
2924 conn->session_ticket = NULL;
2925
2926 if (ext->type == 35) {
2927 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
2928 "extension", ext->data, ext->length);
2929 conn->session_ticket = os_malloc(ext->length);
2930 if (conn->session_ticket == NULL)
2931 return SSL_AD_INTERNAL_ERROR;
2932
2933 os_memcpy(conn->session_ticket, ext->data, ext->length);
2934 conn->session_ticket_len = ext->length;
2935 }
2936
2937 return 0;
2938}
2939#endif /* SSL_OP_NO_TICKET */
0cf03892 2940#endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */
1e5839e0 2941#endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
6fc6879b
JM		 2942
2943
2944int tls_connection_set_session_ticket_cb(void *tls_ctx,
2945 struct tls_connection *conn,
2946 tls_session_ticket_cb cb,
2947 void *ctx)
2948{
1e5839e0 2949#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
6fc6879b
JM		 2950 conn->session_ticket_cb = cb;
2951 conn->session_ticket_cb_ctx = ctx;
2952
2953 if (cb) {
2954 if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb,
2955 conn) != 1)
2956 return -1;
0cf03892
JM		 2957#ifdef CONFIG_OPENSSL_TICKET_OVERRIDE
2958 SSL_set_session_ticket_ext_cb(conn->ssl,
2959 tls_session_ticket_ext_cb, conn);
2960#else /* CONFIG_OPENSSL_TICKET_OVERRIDE */
6fc6879b
JM		 2961#ifdef SSL_OP_NO_TICKET
2962 SSL_set_tlsext_debug_callback(conn->ssl, tls_hello_ext_cb);
2963 SSL_set_tlsext_debug_arg(conn->ssl, conn);
2964#else /* SSL_OP_NO_TICKET */
2965 if (SSL_set_hello_extension_cb(conn->ssl, tls_hello_ext_cb,
2966 conn) != 1)
2967 return -1;
2968#endif /* SSL_OP_NO_TICKET */
0cf03892 2969#endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */
6fc6879b
JM		 2970 } else {
2971 if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1)
2972 return -1;
0cf03892
JM		 2973#ifdef CONFIG_OPENSSL_TICKET_OVERRIDE
2974 SSL_set_session_ticket_ext_cb(conn->ssl, NULL, NULL);
2975#else /* CONFIG_OPENSSL_TICKET_OVERRIDE */
6fc6879b
JM		 2976#ifdef SSL_OP_NO_TICKET
2977 SSL_set_tlsext_debug_callback(conn->ssl, NULL);
2978 SSL_set_tlsext_debug_arg(conn->ssl, conn);
2979#else /* SSL_OP_NO_TICKET */
2980 if (SSL_set_hello_extension_cb(conn->ssl, NULL, NULL) != 1)
2981 return -1;
2982#endif /* SSL_OP_NO_TICKET */
0cf03892 2983#endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */
6fc6879b
JM		 2984 }
2985
2986 return 0;
1e5839e0 2987#else /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
6fc6879b 2988 return -1;
1e5839e0 2989#endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
6fc6879b 2990}
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