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EAP-TLS server: Add support for session resumption
[thirdparty/hostap.git] / src / crypto / tls_openssl.c
CommitLineData
6fc6879b 1/*
81c85c06 2 * SSL/TLS interface functions for OpenSSL
16bc3b89 3 * Copyright (c) 2004-2015, 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
1176ab6d 13#ifndef ANDROID
6fc6879b
JM		 14#define OPENSSL_NO_ENGINE
15#endif
16#endif
1176ab6d 17#endif
6fc6879b
JM		 18
19#include <openssl/ssl.h>
20#include <openssl/err.h>
21#include <openssl/pkcs12.h>
22#include <openssl/x509v3.h>
23#ifndef OPENSSL_NO_ENGINE
24#include <openssl/engine.h>
25#endif /* OPENSSL_NO_ENGINE */
690e543e
JM		 26#ifndef OPENSSL_NO_DSA
27#include <openssl/dsa.h>
28#endif
29#ifndef OPENSSL_NO_DH
30#include <openssl/dh.h>
31#endif
6fc6879b
JM		 32
33#include "common.h"
00468b46 34#include "crypto.h"
fa0e7151 35#include "sha1.h"
16bc3b89 36#include "sha256.h"
6fc6879b
JM		 37#include "tls.h"
38
a8572960
AL		 39#if OPENSSL_VERSION_NUMBER < 0x10000000L
40/* ERR_remove_thread_state replaces ERR_remove_state and the latter is
41 * deprecated. However, OpenSSL 0.9.8 doesn't include
42 * ERR_remove_thread_state. */
43#define ERR_remove_thread_state(tid) ERR_remove_state(0)
44#endif
45
a8572960
AL		 46#if defined(OPENSSL_IS_BORINGSSL)
47/* stack_index_t is the return type of OpenSSL's sk_XXX_num() functions. */
48typedef size_t stack_index_t;
49#else
50typedef int stack_index_t;
0cf03892
JM		 51#endif
52
080585c0
JM		 53#ifdef SSL_set_tlsext_status_type
54#ifndef OPENSSL_NO_TLSEXT
55#define HAVE_OCSP
56#include <openssl/ocsp.h>
57#endif /* OPENSSL_NO_TLSEXT */
58#endif /* SSL_set_tlsext_status_type */
59
1d415f1f
KR		 60#ifdef ANDROID
61#include <openssl/pem.h>
62#include <keystore/keystore_get.h>
63
64static BIO * BIO_from_keystore(const char *key)
65{
66 BIO *bio = NULL;
67 uint8_t *value = NULL;
68 int length = keystore_get(key, strlen(key), &value);
69 if (length != -1 && (bio = BIO_new(BIO_s_mem())) != NULL)
70 BIO_write(bio, value, length);
71 free(value);
72 return bio;
73}
74#endif /* ANDROID */
75
6fc6879b
JM		 76static int tls_openssl_ref_count = 0;
77
7c0e1e27 78struct tls_context {
00468b46
JM		 79 void (*event_cb)(void *ctx, enum tls_event ev,
80 union tls_event_data *data);
81 void *cb_ctx;
1b414f59 82 int cert_in_cb;
080585c0 83 char *ocsp_stapling_response;
00468b46
JM		 84};
85
7c0e1e27 86static struct tls_context *tls_global = NULL;
00468b46
JM		 87
88
bd9b8b2b
JM		 89struct tls_data {
90 SSL_CTX *ssl;
91};
92
6fc6879b 93struct tls_connection {
7c0e1e27 94 struct tls_context *context;
68ae4773 95 SSL_CTX *ssl_ctx;
6fc6879b
JM		 96 SSL *ssl;
97 BIO *ssl_in, *ssl_out;
98#ifndef OPENSSL_NO_ENGINE
99 ENGINE *engine; /* functional reference to the engine */
100 EVP_PKEY *private_key; /* the private key if using engine */
101#endif /* OPENSSL_NO_ENGINE */
cebee30f 102 char *subject_match, *altsubject_match, *suffix_match, *domain_match;
6fc6879b
JM		 103 int read_alerts, write_alerts, failed;
104
105 tls_session_ticket_cb session_ticket_cb;
106 void *session_ticket_cb_ctx;
107
108 /* SessionTicket received from OpenSSL hello_extension_cb (server) */
109 u8 *session_ticket;
110 size_t session_ticket_len;
00468b46 111
8d6399e4
JM		 112 unsigned int ca_cert_verify:1;
113 unsigned int cert_probe:1;
114 unsigned int server_cert_only:1;
bb52293e 115 unsigned int invalid_hb_used:1;
00468b46
JM		 116
117 u8 srv_cert_hash[32];
235279e7
JM		 118
119 unsigned int flags;
080585c0
JM		 120
121 X509 *peer_cert;
122 X509 *peer_issuer;
6bf61fb2 123 X509 *peer_issuer_issuer;
005c5dcf
JM		 124
125#if OPENSSL_VERSION_NUMBER >= 0x10100000L
126 unsigned char client_random[SSL3_RANDOM_SIZE];
127 unsigned char server_random[SSL3_RANDOM_SIZE];
128#endif
6fc6879b
JM		 129};
130
131
7c0e1e27
PS		 132static struct tls_context * tls_context_new(const struct tls_config *conf)
133{
134 struct tls_context *context = os_zalloc(sizeof(*context));
135 if (context == NULL)
136 return NULL;
137 if (conf) {
138 context->event_cb = conf->event_cb;
139 context->cb_ctx = conf->cb_ctx;
140 context->cert_in_cb = conf->cert_in_cb;
141 }
142 return context;
143}
144
145
6fc6879b
JM		 146#ifdef CONFIG_NO_STDOUT_DEBUG
147
148static void _tls_show_errors(void)
149{
150 unsigned long err;
151
152 while ((err = ERR_get_error())) {
153 /* Just ignore the errors, since stdout is disabled */
154 }
155}
156#define tls_show_errors(l, f, t) _tls_show_errors()
157
158#else /* CONFIG_NO_STDOUT_DEBUG */
159
160static void tls_show_errors(int level, const char *func, const char *txt)
161{
162 unsigned long err;
163
164 wpa_printf(level, "OpenSSL: %s - %s %s",
165 func, txt, ERR_error_string(ERR_get_error(), NULL));
166
167 while ((err = ERR_get_error())) {
168 wpa_printf(MSG_INFO, "OpenSSL: pending error: %s",
169 ERR_error_string(err, NULL));
170 }
171}
172
173#endif /* CONFIG_NO_STDOUT_DEBUG */
174
175
176#ifdef CONFIG_NATIVE_WINDOWS
177
178/* Windows CryptoAPI and access to certificate stores */
179#include <wincrypt.h>
180
181#ifdef __MINGW32_VERSION
182/*
183 * MinGW does not yet include all the needed definitions for CryptoAPI, so
184 * define here whatever extra is needed.
185 */
6fc6879b
JM		 186#define CERT_SYSTEM_STORE_CURRENT_USER (1 << 16)
187#define CERT_STORE_READONLY_FLAG 0x00008000
188#define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000
6fc6879b
JM		 189
190#endif /* __MINGW32_VERSION */
191
192
193struct cryptoapi_rsa_data {
194 const CERT_CONTEXT *cert;
195 HCRYPTPROV crypt_prov;
196 DWORD key_spec;
197 BOOL free_crypt_prov;
198};
199
200
201static void cryptoapi_error(const char *msg)
202{
203 wpa_printf(MSG_INFO, "CryptoAPI: %s; err=%u",
204 msg, (unsigned int) GetLastError());
205}
206
207
208static int cryptoapi_rsa_pub_enc(int flen, const unsigned char *from,
209 unsigned char *to, RSA *rsa, int padding)
210{
211 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
212 return 0;
213}
214
215
216static int cryptoapi_rsa_pub_dec(int flen, const unsigned char *from,
217 unsigned char *to, RSA *rsa, int padding)
218{
219 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
220 return 0;
221}
222
223
224static int cryptoapi_rsa_priv_enc(int flen, const unsigned char *from,
225 unsigned char *to, RSA *rsa, int padding)
226{
227 struct cryptoapi_rsa_data *priv =
228 (struct cryptoapi_rsa_data *) rsa->meth->app_data;
229 HCRYPTHASH hash;
230 DWORD hash_size, len, i;
231 unsigned char *buf = NULL;
232 int ret = 0;
233
234 if (priv == NULL) {
235 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
236 ERR_R_PASSED_NULL_PARAMETER);
237 return 0;
238 }
239
240 if (padding != RSA_PKCS1_PADDING) {
241 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
242 RSA_R_UNKNOWN_PADDING_TYPE);
243 return 0;
244 }
245
246 if (flen != 16 /* MD5 */ + 20 /* SHA-1 */) {
247 wpa_printf(MSG_INFO, "%s - only MD5-SHA1 hash supported",
248 __func__);
249 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
250 RSA_R_INVALID_MESSAGE_LENGTH);
251 return 0;
252 }
253
254 if (!CryptCreateHash(priv->crypt_prov, CALG_SSL3_SHAMD5, 0, 0, &hash))
255 {
256 cryptoapi_error("CryptCreateHash failed");
257 return 0;
258 }
259
260 len = sizeof(hash_size);
261 if (!CryptGetHashParam(hash, HP_HASHSIZE, (BYTE *) &hash_size, &len,
262 0)) {
263 cryptoapi_error("CryptGetHashParam failed");
264 goto err;
265 }
266
267 if ((int) hash_size != flen) {
268 wpa_printf(MSG_INFO, "CryptoAPI: Invalid hash size (%u != %d)",
269 (unsigned) hash_size, flen);
270 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
271 RSA_R_INVALID_MESSAGE_LENGTH);
272 goto err;
273 }
274 if (!CryptSetHashParam(hash, HP_HASHVAL, (BYTE * ) from, 0)) {
275 cryptoapi_error("CryptSetHashParam failed");
276 goto err;
277 }
278
279 len = RSA_size(rsa);
280 buf = os_malloc(len);
281 if (buf == NULL) {
282 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_MALLOC_FAILURE);
283 goto err;
284 }
285
286 if (!CryptSignHash(hash, priv->key_spec, NULL, 0, buf, &len)) {
287 cryptoapi_error("CryptSignHash failed");
288 goto err;
289 }
290
291 for (i = 0; i < len; i++)
292 to[i] = buf[len - i - 1];
293 ret = len;
294
295err:
296 os_free(buf);
297 CryptDestroyHash(hash);
298
299 return ret;
300}
301
302
303static int cryptoapi_rsa_priv_dec(int flen, const unsigned char *from,
304 unsigned char *to, RSA *rsa, int padding)
305{
306 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
307 return 0;
308}
309
310
311static void cryptoapi_free_data(struct cryptoapi_rsa_data *priv)
312{
313 if (priv == NULL)
314 return;
315 if (priv->crypt_prov && priv->free_crypt_prov)
316 CryptReleaseContext(priv->crypt_prov, 0);
317 if (priv->cert)
318 CertFreeCertificateContext(priv->cert);
319 os_free(priv);
320}
321
322
323static int cryptoapi_finish(RSA *rsa)
324{
325 cryptoapi_free_data((struct cryptoapi_rsa_data *) rsa->meth->app_data);
326 os_free((void *) rsa->meth);
327 rsa->meth = NULL;
328 return 1;
329}
330
331
332static const CERT_CONTEXT * cryptoapi_find_cert(const char *name, DWORD store)
333{
334 HCERTSTORE cs;
335 const CERT_CONTEXT *ret = NULL;
336
337 cs = CertOpenStore((LPCSTR) CERT_STORE_PROV_SYSTEM, 0, 0,
338 store | CERT_STORE_OPEN_EXISTING_FLAG |
339 CERT_STORE_READONLY_FLAG, L"MY");
340 if (cs == NULL) {
341 cryptoapi_error("Failed to open 'My system store'");
342 return NULL;
343 }
344
345 if (strncmp(name, "cert://", 7) == 0) {
346 unsigned short wbuf[255];
347 MultiByteToWideChar(CP_ACP, 0, name + 7, -1, wbuf, 255);
348 ret = CertFindCertificateInStore(cs, X509_ASN_ENCODING |
349 PKCS_7_ASN_ENCODING,
350 0, CERT_FIND_SUBJECT_STR,
351 wbuf, NULL);
352 } else if (strncmp(name, "hash://", 7) == 0) {
353 CRYPT_HASH_BLOB blob;
354 int len;
355 const char *hash = name + 7;
356 unsigned char *buf;
357
358 len = os_strlen(hash) / 2;
359 buf = os_malloc(len);
360 if (buf && hexstr2bin(hash, buf, len) == 0) {
361 blob.cbData = len;
362 blob.pbData = buf;
363 ret = CertFindCertificateInStore(cs,
364 X509_ASN_ENCODING |
365 PKCS_7_ASN_ENCODING,
366 0, CERT_FIND_HASH,
367 &blob, NULL);
368 }
369 os_free(buf);
370 }
371
372 CertCloseStore(cs, 0);
373
374 return ret;
375}
376
377
378static int tls_cryptoapi_cert(SSL *ssl, const char *name)
379{
380 X509 *cert = NULL;
381 RSA *rsa = NULL, *pub_rsa;
382 struct cryptoapi_rsa_data *priv;
383 RSA_METHOD *rsa_meth;
384
385 if (name == NULL ||
386 (strncmp(name, "cert://", 7) != 0 &&
387 strncmp(name, "hash://", 7) != 0))
388 return -1;
389
390 priv = os_zalloc(sizeof(*priv));
391 rsa_meth = os_zalloc(sizeof(*rsa_meth));
392 if (priv == NULL || rsa_meth == NULL) {
393 wpa_printf(MSG_WARNING, "CryptoAPI: Failed to allocate memory "
394 "for CryptoAPI RSA method");
395 os_free(priv);
396 os_free(rsa_meth);
397 return -1;
398 }
399
400 priv->cert = cryptoapi_find_cert(name, CERT_SYSTEM_STORE_CURRENT_USER);
401 if (priv->cert == NULL) {
402 priv->cert = cryptoapi_find_cert(
403 name, CERT_SYSTEM_STORE_LOCAL_MACHINE);
404 }
405 if (priv->cert == NULL) {
406 wpa_printf(MSG_INFO, "CryptoAPI: Could not find certificate "
407 "'%s'", name);
408 goto err;
409 }
410
fee31f76
JM		 411 cert = d2i_X509(NULL,
412 (const unsigned char **) &priv->cert->pbCertEncoded,
6fc6879b
JM		 413 priv->cert->cbCertEncoded);
414 if (cert == NULL) {
415 wpa_printf(MSG_INFO, "CryptoAPI: Could not process X509 DER "
416 "encoding");
417 goto err;
418 }
419
6fc6879b
JM		 420 if (!CryptAcquireCertificatePrivateKey(priv->cert,
421 CRYPT_ACQUIRE_COMPARE_KEY_FLAG,
422 NULL, &priv->crypt_prov,
423 &priv->key_spec,
424 &priv->free_crypt_prov)) {
425 cryptoapi_error("Failed to acquire a private key for the "
426 "certificate");
427 goto err;
428 }
429
430 rsa_meth->name = "Microsoft CryptoAPI RSA Method";
431 rsa_meth->rsa_pub_enc = cryptoapi_rsa_pub_enc;
432 rsa_meth->rsa_pub_dec = cryptoapi_rsa_pub_dec;
433 rsa_meth->rsa_priv_enc = cryptoapi_rsa_priv_enc;
434 rsa_meth->rsa_priv_dec = cryptoapi_rsa_priv_dec;
435 rsa_meth->finish = cryptoapi_finish;
436 rsa_meth->flags = RSA_METHOD_FLAG_NO_CHECK;
437 rsa_meth->app_data = (char *) priv;
438
439 rsa = RSA_new();
440 if (rsa == NULL) {
441 SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE,
442 ERR_R_MALLOC_FAILURE);
443 goto err;
444 }
445
446 if (!SSL_use_certificate(ssl, cert)) {
447 RSA_free(rsa);
448 rsa = NULL;
449 goto err;
450 }
451 pub_rsa = cert->cert_info->key->pkey->pkey.rsa;
452 X509_free(cert);
453 cert = NULL;
454
455 rsa->n = BN_dup(pub_rsa->n);
456 rsa->e = BN_dup(pub_rsa->e);
457 if (!RSA_set_method(rsa, rsa_meth))
458 goto err;
459
460 if (!SSL_use_RSAPrivateKey(ssl, rsa))
461 goto err;
462 RSA_free(rsa);
463
464 return 0;
465
466err:
467 if (cert)
468 X509_free(cert);
469 if (rsa)
470 RSA_free(rsa);
471 else {
472 os_free(rsa_meth);
473 cryptoapi_free_data(priv);
474 }
475 return -1;
476}
477
478
479static int tls_cryptoapi_ca_cert(SSL_CTX *ssl_ctx, SSL *ssl, const char *name)
480{
481 HCERTSTORE cs;
482 PCCERT_CONTEXT ctx = NULL;
483 X509 *cert;
484 char buf[128];
485 const char *store;
486#ifdef UNICODE
487 WCHAR *wstore;
488#endif /* UNICODE */
489
6fc6879b
JM		 490 if (name == NULL || strncmp(name, "cert_store://", 13) != 0)
491 return -1;
492
493 store = name + 13;
494#ifdef UNICODE
495 wstore = os_malloc((os_strlen(store) + 1) * sizeof(WCHAR));
496 if (wstore == NULL)
497 return -1;
498 wsprintf(wstore, L"%S", store);
499 cs = CertOpenSystemStore(0, wstore);
500 os_free(wstore);
501#else /* UNICODE */
502 cs = CertOpenSystemStore(0, store);
503#endif /* UNICODE */
504 if (cs == NULL) {
505 wpa_printf(MSG_DEBUG, "%s: failed to open system cert store "
506 "'%s': error=%d", __func__, store,
507 (int) GetLastError());
508 return -1;
509 }
510
511 while ((ctx = CertEnumCertificatesInStore(cs, ctx))) {
fee31f76
JM		 512 cert = d2i_X509(NULL,
513 (const unsigned char **) &ctx->pbCertEncoded,
6fc6879b
JM		 514 ctx->cbCertEncoded);
515 if (cert == NULL) {
516 wpa_printf(MSG_INFO, "CryptoAPI: Could not process "
517 "X509 DER encoding for CA cert");
518 continue;
519 }
520
521 X509_NAME_oneline(X509_get_subject_name(cert), buf,
522 sizeof(buf));
523 wpa_printf(MSG_DEBUG, "OpenSSL: Loaded CA certificate for "
524 "system certificate store: subject='%s'", buf);
525
526 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
527 tls_show_errors(MSG_WARNING, __func__,
528 "Failed to add ca_cert to OpenSSL "
529 "certificate store");
530 }
531
532 X509_free(cert);
533 }
534
535 if (!CertCloseStore(cs, 0)) {
536 wpa_printf(MSG_DEBUG, "%s: failed to close system cert store "
537 "'%s': error=%d", __func__, name + 13,
538 (int) GetLastError());
539 }
540
541 return 0;
542}
543
544
545#else /* CONFIG_NATIVE_WINDOWS */
546
547static int tls_cryptoapi_cert(SSL *ssl, const char *name)
548{
549 return -1;
550}
551
552#endif /* CONFIG_NATIVE_WINDOWS */
553
554
555static void ssl_info_cb(const SSL *ssl, int where, int ret)
556{
557 const char *str;
558 int w;
559
560 wpa_printf(MSG_DEBUG, "SSL: (where=0x%x ret=0x%x)", where, ret);
561 w = where & ~SSL_ST_MASK;
562 if (w & SSL_ST_CONNECT)
563 str = "SSL_connect";
564 else if (w & SSL_ST_ACCEPT)
565 str = "SSL_accept";
566 else
567 str = "undefined";
568
569 if (where & SSL_CB_LOOP) {
570 wpa_printf(MSG_DEBUG, "SSL: %s:%s",
571 str, SSL_state_string_long(ssl));
572 } else if (where & SSL_CB_ALERT) {
7c0e1e27 573 struct tls_connection *conn = SSL_get_app_data((SSL *) ssl);
6fc6879b
JM		 574 wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s",
575 where & SSL_CB_READ ?
576 "read (remote end reported an error)" :
577 "write (local SSL3 detected an error)",
578 SSL_alert_type_string_long(ret),
579 SSL_alert_desc_string_long(ret));
580 if ((ret >> 8) == SSL3_AL_FATAL) {
6fc6879b
JM		 581 if (where & SSL_CB_READ)
582 conn->read_alerts++;
583 else
584 conn->write_alerts++;
585 }
7c0e1e27 586 if (conn->context->event_cb != NULL) {
dd7fec1f 587 union tls_event_data ev;
7c0e1e27 588 struct tls_context *context = conn->context;
dd7fec1f
PS		 589 os_memset(&ev, 0, sizeof(ev));
590 ev.alert.is_local = !(where & SSL_CB_READ);
591 ev.alert.type = SSL_alert_type_string_long(ret);
592 ev.alert.description = SSL_alert_desc_string_long(ret);
7c0e1e27 593 context->event_cb(context->cb_ctx, TLS_ALERT, &ev);
dd7fec1f 594 }
6fc6879b
JM		 595 } else if (where & SSL_CB_EXIT && ret <= 0) {
596 wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s",
597 str, ret == 0 ? "failed" : "error",
598 SSL_state_string_long(ssl));
599 }
600}
601
602
603#ifndef OPENSSL_NO_ENGINE
604/**
605 * tls_engine_load_dynamic_generic - load any openssl engine
606 * @pre: an array of commands and values that load an engine initialized
607 * in the engine specific function
608 * @post: an array of commands and values that initialize an already loaded
609 * engine (or %NULL if not required)
610 * @id: the engine id of the engine to load (only required if post is not %NULL
611 *
612 * This function is a generic function that loads any openssl engine.
613 *
614 * Returns: 0 on success, -1 on failure
615 */
616static int tls_engine_load_dynamic_generic(const char *pre[],
617 const char *post[], const char *id)
618{
619 ENGINE *engine;
620 const char *dynamic_id = "dynamic";
621
622 engine = ENGINE_by_id(id);
623 if (engine) {
624 ENGINE_free(engine);
625 wpa_printf(MSG_DEBUG, "ENGINE: engine '%s' is already "
626 "available", id);
627 return 0;
628 }
629 ERR_clear_error();
630
631 engine = ENGINE_by_id(dynamic_id);
632 if (engine == NULL) {
633 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
634 dynamic_id,
635 ERR_error_string(ERR_get_error(), NULL));
636 return -1;
637 }
638
639 /* Perform the pre commands. This will load the engine. */
640 while (pre && pre[0]) {
641 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", pre[0], pre[1]);
642 if (ENGINE_ctrl_cmd_string(engine, pre[0], pre[1], 0) == 0) {
643 wpa_printf(MSG_INFO, "ENGINE: ctrl cmd_string failed: "
644 "%s %s [%s]", pre[0], pre[1],
645 ERR_error_string(ERR_get_error(), NULL));
646 ENGINE_free(engine);
647 return -1;
648 }
649 pre += 2;
650 }
651
652 /*
653 * Free the reference to the "dynamic" engine. The loaded engine can
654 * now be looked up using ENGINE_by_id().
655 */
656 ENGINE_free(engine);
657
658 engine = ENGINE_by_id(id);
659 if (engine == NULL) {
660 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
661 id, ERR_error_string(ERR_get_error(), NULL));
662 return -1;
663 }
664
665 while (post && post[0]) {
666 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", post[0], post[1]);
667 if (ENGINE_ctrl_cmd_string(engine, post[0], post[1], 0) == 0) {
668 wpa_printf(MSG_DEBUG, "ENGINE: ctrl cmd_string failed:"
669 " %s %s [%s]", post[0], post[1],
670 ERR_error_string(ERR_get_error(), NULL));
671 ENGINE_remove(engine);
672 ENGINE_free(engine);
673 return -1;
674 }
675 post += 2;
676 }
677 ENGINE_free(engine);
678
679 return 0;
680}
681
682
683/**
684 * tls_engine_load_dynamic_pkcs11 - load the pkcs11 engine provided by opensc
685 * @pkcs11_so_path: pksc11_so_path from the configuration
686 * @pcks11_module_path: pkcs11_module_path from the configuration
687 */
688static int tls_engine_load_dynamic_pkcs11(const char *pkcs11_so_path,
689 const char *pkcs11_module_path)
690{
691 char *engine_id = "pkcs11";
692 const char *pre_cmd[] = {
693 "SO_PATH", NULL /* pkcs11_so_path */,
694 "ID", NULL /* engine_id */,
695 "LIST_ADD", "1",
696 /* "NO_VCHECK", "1", */
697 "LOAD", NULL,
698 NULL, NULL
699 };
700 const char *post_cmd[] = {
701 "MODULE_PATH", NULL /* pkcs11_module_path */,
702 NULL, NULL
703 };
704
5c8ab0d4 705 if (!pkcs11_so_path)
6fc6879b
JM		 706 return 0;
707
708 pre_cmd[1] = pkcs11_so_path;
709 pre_cmd[3] = engine_id;
5c8ab0d4
DW		 710 if (pkcs11_module_path)
711 post_cmd[1] = pkcs11_module_path;
712 else
713 post_cmd[0] = NULL;
6fc6879b
JM		 714
715 wpa_printf(MSG_DEBUG, "ENGINE: Loading pkcs11 Engine from %s",
716 pkcs11_so_path);
717
718 return tls_engine_load_dynamic_generic(pre_cmd, post_cmd, engine_id);
719}
720
721
722/**
723 * tls_engine_load_dynamic_opensc - load the opensc engine provided by opensc
724 * @opensc_so_path: opensc_so_path from the configuration
725 */
726static int tls_engine_load_dynamic_opensc(const char *opensc_so_path)
727{
728 char *engine_id = "opensc";
729 const char *pre_cmd[] = {
730 "SO_PATH", NULL /* opensc_so_path */,
731 "ID", NULL /* engine_id */,
732 "LIST_ADD", "1",
733 "LOAD", NULL,
734 NULL, NULL
735 };
736
737 if (!opensc_so_path)
738 return 0;
739
740 pre_cmd[1] = opensc_so_path;
741 pre_cmd[3] = engine_id;
742
743 wpa_printf(MSG_DEBUG, "ENGINE: Loading OpenSC Engine from %s",
744 opensc_so_path);
745
746 return tls_engine_load_dynamic_generic(pre_cmd, NULL, engine_id);
747}
748#endif /* OPENSSL_NO_ENGINE */
749
750
751void * tls_init(const struct tls_config *conf)
752{
bd9b8b2b 753 struct tls_data *data;
6fc6879b 754 SSL_CTX *ssl;
7c0e1e27 755 struct tls_context *context;
b7328434 756 const char *ciphers;
6fc6879b
JM		 757
758 if (tls_openssl_ref_count == 0) {
7c0e1e27
PS		 759 tls_global = context = tls_context_new(conf);
760 if (context == NULL)
00468b46 761 return NULL;
76f04b38
JM		 762#ifdef CONFIG_FIPS
763#ifdef OPENSSL_FIPS
cf123d7f 764 if (conf && conf->fips_mode) {
4fc53159
JM		 765 static int fips_enabled = 0;
766
767 if (!fips_enabled && !FIPS_mode_set(1)) {
76f04b38
JM		 768 wpa_printf(MSG_ERROR, "Failed to enable FIPS "
769 "mode");
770 ERR_load_crypto_strings();
771 ERR_print_errors_fp(stderr);
b36540db
JM		 772 os_free(tls_global);
773 tls_global = NULL;
76f04b38 774 return NULL;
4fc53159 775 } else {
76f04b38 776 wpa_printf(MSG_INFO, "Running in FIPS mode");
4fc53159
JM		 777 fips_enabled = 1;
778 }
76f04b38
JM		 779 }
780#else /* OPENSSL_FIPS */
cf123d7f 781 if (conf && conf->fips_mode) {
76f04b38
JM		 782 wpa_printf(MSG_ERROR, "FIPS mode requested, but not "
783 "supported");
b36540db
JM		 784 os_free(tls_global);
785 tls_global = NULL;
76f04b38
JM		 786 return NULL;
787 }
788#endif /* OPENSSL_FIPS */
789#endif /* CONFIG_FIPS */
6fc6879b
JM		 790 SSL_load_error_strings();
791 SSL_library_init();
fee31f76 792#ifndef OPENSSL_NO_SHA256
e1ffdfc1
JM		 793 EVP_add_digest(EVP_sha256());
794#endif /* OPENSSL_NO_SHA256 */
6fc6879b
JM		 795 /* TODO: if /dev/urandom is available, PRNG is seeded
796 * automatically. If this is not the case, random data should
797 * be added here. */
798
799#ifdef PKCS12_FUNCS
1056dad7
JM		 800#ifndef OPENSSL_NO_RC2
801 /*
802 * 40-bit RC2 is commonly used in PKCS#12 files, so enable it.
803 * This is enabled by PKCS12_PBE_add() in OpenSSL 0.9.8
804 * versions, but it looks like OpenSSL 1.0.0 does not do that
805 * anymore.
806 */
807 EVP_add_cipher(EVP_rc2_40_cbc());
808#endif /* OPENSSL_NO_RC2 */
6fc6879b
JM		 809 PKCS12_PBE_add();
810#endif /* PKCS12_FUNCS */
7c0e1e27 811 } else {
7c0e1e27
PS		 812 context = tls_context_new(conf);
813 if (context == NULL)
814 return NULL;
6fc6879b
JM		 815 }
816 tls_openssl_ref_count++;
817
bd9b8b2b
JM		 818 data = os_zalloc(sizeof(*data));
819 if (data)
820 ssl = SSL_CTX_new(SSLv23_method());
821 else
822 ssl = NULL;
7c0e1e27
PS		 823 if (ssl == NULL) {
824 tls_openssl_ref_count--;
a288da61
JM		 825 if (context != tls_global)
826 os_free(context);
7c0e1e27
PS		 827 if (tls_openssl_ref_count == 0) {
828 os_free(tls_global);
829 tls_global = NULL;
7c0e1e27 830 }
6fc6879b 831 return NULL;
7c0e1e27 832 }
bd9b8b2b 833 data->ssl = ssl;
6fc6879b 834
35efa247
JM		 835 SSL_CTX_set_options(ssl, SSL_OP_NO_SSLv2);
836 SSL_CTX_set_options(ssl, SSL_OP_NO_SSLv3);
837
6fc6879b 838 SSL_CTX_set_info_callback(ssl, ssl_info_cb);
7c0e1e27 839 SSL_CTX_set_app_data(ssl, context);
6fc6879b
JM		 840
841#ifndef OPENSSL_NO_ENGINE
ddda6276
DW		 842 wpa_printf(MSG_DEBUG, "ENGINE: Loading dynamic engine");
843 ERR_load_ENGINE_strings();
844 ENGINE_load_dynamic();
845
6fc6879b
JM		 846 if (conf &&
847 (conf->opensc_engine_path || conf->pkcs11_engine_path ||
848 conf->pkcs11_module_path)) {
6fc6879b
JM		 849 if (tls_engine_load_dynamic_opensc(conf->opensc_engine_path) ||
850 tls_engine_load_dynamic_pkcs11(conf->pkcs11_engine_path,
851 conf->pkcs11_module_path)) {
bd9b8b2b 852 tls_deinit(data);
6fc6879b
JM		 853 return NULL;
854 }
855 }
856#endif /* OPENSSL_NO_ENGINE */
857
b7328434
JM		 858 if (conf && conf->openssl_ciphers)
859 ciphers = conf->openssl_ciphers;
860 else
861 ciphers = "DEFAULT:!EXP:!LOW";
862 if (SSL_CTX_set_cipher_list(ssl, ciphers) != 1) {
863 wpa_printf(MSG_ERROR,
864 "OpenSSL: Failed to set cipher string '%s'",
865 ciphers);
bd9b8b2b 866 tls_deinit(data);
b7328434
JM		 867 return NULL;
868 }
869
bd9b8b2b 870 return data;
6fc6879b
JM		 871}
872
873
874void tls_deinit(void *ssl_ctx)
875{
bd9b8b2b
JM		 876 struct tls_data *data = ssl_ctx;
877 SSL_CTX *ssl = data->ssl;
7c0e1e27
PS		 878 struct tls_context *context = SSL_CTX_get_app_data(ssl);
879 if (context != tls_global)
880 os_free(context);
6fc6879b
JM		 881 SSL_CTX_free(ssl);
882
883 tls_openssl_ref_count--;
884 if (tls_openssl_ref_count == 0) {
885#ifndef OPENSSL_NO_ENGINE
886 ENGINE_cleanup();
887#endif /* OPENSSL_NO_ENGINE */
888 CRYPTO_cleanup_all_ex_data();
a8572960 889 ERR_remove_thread_state(NULL);
6fc6879b
JM		 890 ERR_free_strings();
891 EVP_cleanup();
080585c0
JM		 892 os_free(tls_global->ocsp_stapling_response);
893 tls_global->ocsp_stapling_response = NULL;
00468b46
JM		 894 os_free(tls_global);
895 tls_global = NULL;
6fc6879b 896 }
bd9b8b2b
JM		 897
898 os_free(data);
6fc6879b
JM		 899}
900
901
fd4fb281
MG		 902#ifndef OPENSSL_NO_ENGINE
903
904/* Cryptoki return values */
905#define CKR_PIN_INCORRECT 0x000000a0
906#define CKR_PIN_INVALID 0x000000a1
907#define CKR_PIN_LEN_RANGE 0x000000a2
908
909/* libp11 */
910#define ERR_LIB_PKCS11 ERR_LIB_USER
911
912static int tls_is_pin_error(unsigned int err)
913{
914 return ERR_GET_LIB(err) == ERR_LIB_PKCS11 &&
915 (ERR_GET_REASON(err) == CKR_PIN_INCORRECT ||
916 ERR_GET_REASON(err) == CKR_PIN_INVALID ||
917 ERR_GET_REASON(err) == CKR_PIN_LEN_RANGE);
918}
919
920#endif /* OPENSSL_NO_ENGINE */
921
922
6fc6879b 923static int tls_engine_init(struct tls_connection *conn, const char *engine_id,
e59c91af
DS		 924 const char *pin, const char *key_id,
925 const char *cert_id, const char *ca_cert_id)
6fc6879b
JM		 926{
927#ifndef OPENSSL_NO_ENGINE
928 int ret = -1;
929 if (engine_id == NULL) {
930 wpa_printf(MSG_ERROR, "ENGINE: Engine ID not set");
931 return -1;
932 }
6fc6879b
JM		 933
934 ERR_clear_error();
1176ab6d
KR		 935#ifdef ANDROID
936 ENGINE_load_dynamic();
937#endif
6fc6879b
JM		 938 conn->engine = ENGINE_by_id(engine_id);
939 if (!conn->engine) {
940 wpa_printf(MSG_ERROR, "ENGINE: engine %s not available [%s]",
941 engine_id, ERR_error_string(ERR_get_error(), NULL));
942 goto err;
943 }
944 if (ENGINE_init(conn->engine) != 1) {
945 wpa_printf(MSG_ERROR, "ENGINE: engine init failed "
946 "(engine: %s) [%s]", engine_id,
947 ERR_error_string(ERR_get_error(), NULL));
948 goto err;
949 }
950 wpa_printf(MSG_DEBUG, "ENGINE: engine initialized");
951
1176ab6d 952#ifndef ANDROID
a642a52b 953 if (pin && ENGINE_ctrl_cmd_string(conn->engine, "PIN", pin, 0) == 0) {
6fc6879b
JM		 954 wpa_printf(MSG_ERROR, "ENGINE: cannot set pin [%s]",
955 ERR_error_string(ERR_get_error(), NULL));
956 goto err;
957 }
1176ab6d 958#endif
3d268b8d 959 if (key_id) {
a642a52b
DW		 960 /*
961 * Ensure that the ENGINE does not attempt to use the OpenSSL
962 * UI system to obtain a PIN, if we didn't provide one.
963 */
964 struct {
965 const void *password;
966 const char *prompt_info;
967 } key_cb = { "", NULL };
968
3d268b8d
DW		 969 /* load private key first in-case PIN is required for cert */
970 conn->private_key = ENGINE_load_private_key(conn->engine,
a642a52b
DW		 971 key_id, NULL,
972 &key_cb);
3d268b8d 973 if (!conn->private_key) {
fd4fb281
MG		 974 unsigned long err = ERR_get_error();
975
3d268b8d
DW		 976 wpa_printf(MSG_ERROR,
977 "ENGINE: cannot load private key with id '%s' [%s]",
978 key_id,
fd4fb281
MG		 979 ERR_error_string(err, NULL));
980 if (tls_is_pin_error(err))
981 ret = TLS_SET_PARAMS_ENGINE_PRV_BAD_PIN;
982 else
983 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
3d268b8d
DW		 984 goto err;
985 }
6fc6879b 986 }
e59c91af
DS		 987
988 /* handle a certificate and/or CA certificate */
989 if (cert_id || ca_cert_id) {
990 const char *cmd_name = "LOAD_CERT_CTRL";
991
992 /* test if the engine supports a LOAD_CERT_CTRL */
993 if (!ENGINE_ctrl(conn->engine, ENGINE_CTRL_GET_CMD_FROM_NAME,
994 0, (void *)cmd_name, NULL)) {
995 wpa_printf(MSG_ERROR, "ENGINE: engine does not support"
996 " loading certificates");
997 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
998 goto err;
999 }
1000 }
1001
6fc6879b
JM		 1002 return 0;
1003
1004err:
1005 if (conn->engine) {
1006 ENGINE_free(conn->engine);
1007 conn->engine = NULL;
1008 }
1009
1010 if (conn->private_key) {
1011 EVP_PKEY_free(conn->private_key);
1012 conn->private_key = NULL;
1013 }
1014
1015 return ret;
1016#else /* OPENSSL_NO_ENGINE */
1017 return 0;
1018#endif /* OPENSSL_NO_ENGINE */
1019}
1020
1021
1022static void tls_engine_deinit(struct tls_connection *conn)
1023{
1024#ifndef OPENSSL_NO_ENGINE
1025 wpa_printf(MSG_DEBUG, "ENGINE: engine deinit");
1026 if (conn->private_key) {
1027 EVP_PKEY_free(conn->private_key);
1028 conn->private_key = NULL;
1029 }
1030 if (conn->engine) {
1031 ENGINE_finish(conn->engine);
1032 conn->engine = NULL;
1033 }
1034#endif /* OPENSSL_NO_ENGINE */
1035}
1036
1037
1038int tls_get_errors(void *ssl_ctx)
1039{
1040 int count = 0;
1041 unsigned long err;
1042
1043 while ((err = ERR_get_error())) {
1044 wpa_printf(MSG_INFO, "TLS - SSL error: %s",
1045 ERR_error_string(err, NULL));
1046 count++;
1047 }
1048
1049 return count;
1050}
1051
bb52293e
JM		 1052
1053static void tls_msg_cb(int write_p, int version, int content_type,
1054 const void *buf, size_t len, SSL *ssl, void *arg)
1055{
1056 struct tls_connection *conn = arg;
1057 const u8 *pos = buf;
1058
1059 wpa_printf(MSG_DEBUG, "OpenSSL: %s ver=0x%x content_type=%d",
1060 write_p ? "TX" : "RX", version, content_type);
1061 wpa_hexdump_key(MSG_MSGDUMP, "OpenSSL: Message", buf, len);
1062 if (content_type == 24 && len >= 3 && pos[0] == 1) {
1063 size_t payload_len = WPA_GET_BE16(pos + 1);
1064 if (payload_len + 3 > len) {
1065 wpa_printf(MSG_ERROR, "OpenSSL: Heartbeat attack detected");
1066 conn->invalid_hb_used = 1;
1067 }
1068 }
1069}
1070
1071
6a31a31d 1072struct tls_connection * tls_connection_init(void *ssl_ctx)
6fc6879b 1073{
bd9b8b2b
JM		 1074 struct tls_data *data = ssl_ctx;
1075 SSL_CTX *ssl = data->ssl;
6a31a31d 1076 struct tls_connection *conn;
fca25ef4 1077 long options;
6a31a31d 1078 struct tls_context *context = SSL_CTX_get_app_data(ssl);
6fc6879b 1079
6a31a31d
JM		 1080 conn = os_zalloc(sizeof(*conn));
1081 if (conn == NULL)
1082 return NULL;
bd9b8b2b 1083 conn->ssl_ctx = ssl;
6a31a31d
JM		 1084 conn->ssl = SSL_new(ssl);
1085 if (conn->ssl == NULL) {
6fc6879b
JM		 1086 tls_show_errors(MSG_INFO, __func__,
1087 "Failed to initialize new SSL connection");
6a31a31d
JM		 1088 os_free(conn);
1089 return NULL;
6fc6879b
JM		 1090 }
1091
6a31a31d
JM		 1092 conn->context = context;
1093 SSL_set_app_data(conn->ssl, conn);
1094 SSL_set_msg_callback(conn->ssl, tls_msg_cb);
1095 SSL_set_msg_callback_arg(conn->ssl, conn);
fca25ef4
JM		 1096 options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 |
1097 SSL_OP_SINGLE_DH_USE;
1098#ifdef SSL_OP_NO_COMPRESSION
1099 options |= SSL_OP_NO_COMPRESSION;
1100#endif /* SSL_OP_NO_COMPRESSION */
6a31a31d 1101 SSL_set_options(conn->ssl, options);
6fc6879b 1102
6a31a31d
JM		 1103 conn->ssl_in = BIO_new(BIO_s_mem());
1104 if (!conn->ssl_in) {
6fc6879b
JM		 1105 tls_show_errors(MSG_INFO, __func__,
1106 "Failed to create a new BIO for ssl_in");
6a31a31d
JM		 1107 SSL_free(conn->ssl);
1108 os_free(conn);
1109 return NULL;
6fc6879b
JM		 1110 }
1111
6a31a31d
JM		 1112 conn->ssl_out = BIO_new(BIO_s_mem());
1113 if (!conn->ssl_out) {
6fc6879b
JM		 1114 tls_show_errors(MSG_INFO, __func__,
1115 "Failed to create a new BIO for ssl_out");
1116 SSL_free(conn->ssl);
6a31a31d 1117 BIO_free(conn->ssl_in);
6fc6879b
JM		 1118 os_free(conn);
1119 return NULL;
1120 }
1121
6a31a31d
JM		 1122 SSL_set_bio(conn->ssl, conn->ssl_in, conn->ssl_out);
1123
6fc6879b
JM		 1124 return conn;
1125}
1126
1127
1128void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn)
1129{
1130 if (conn == NULL)
1131 return;
1132 SSL_free(conn->ssl);
1133 tls_engine_deinit(conn);
1134 os_free(conn->subject_match);
1135 os_free(conn->altsubject_match);
01f809c7 1136 os_free(conn->suffix_match);
cebee30f 1137 os_free(conn->domain_match);
6fc6879b
JM		 1138 os_free(conn->session_ticket);
1139 os_free(conn);
1140}
1141
1142
1143int tls_connection_established(void *ssl_ctx, struct tls_connection *conn)
1144{
1145 return conn ? SSL_is_init_finished(conn->ssl) : 0;
1146}
1147
1148
1149int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn)
1150{
1151 if (conn == NULL)
1152 return -1;
1153
1154 /* Shutdown previous TLS connection without notifying the peer
1155 * because the connection was already terminated in practice
1156 * and "close notify" shutdown alert would confuse AS. */
1157 SSL_set_quiet_shutdown(conn->ssl, 1);
1158 SSL_shutdown(conn->ssl);
a7803b0c 1159 return SSL_clear(conn->ssl) == 1 ? 0 : -1;
6fc6879b
JM		 1160}
1161
1162
1163static int tls_match_altsubject_component(X509 *cert, int type,
1164 const char *value, size_t len)
1165{
1166 GENERAL_NAME *gen;
1167 void *ext;
a8572960
AL		 1168 int found = 0;
1169 stack_index_t i;
6fc6879b
JM		 1170
1171 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
1172
1173 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
1174 gen = sk_GENERAL_NAME_value(ext, i);
1175 if (gen->type != type)
1176 continue;
1177 if (os_strlen((char *) gen->d.ia5->data) == len &&
1178 os_memcmp(value, gen->d.ia5->data, len) == 0)
1179 found++;
1180 }
1181
1182 return found;
1183}
1184
1185
1186static int tls_match_altsubject(X509 *cert, const char *match)
1187{
1188 int type;
1189 const char *pos, *end;
1190 size_t len;
1191
1192 pos = match;
1193 do {
1194 if (os_strncmp(pos, "EMAIL:", 6) == 0) {
1195 type = GEN_EMAIL;
1196 pos += 6;
1197 } else if (os_strncmp(pos, "DNS:", 4) == 0) {
1198 type = GEN_DNS;
1199 pos += 4;
1200 } else if (os_strncmp(pos, "URI:", 4) == 0) {
1201 type = GEN_URI;
1202 pos += 4;
1203 } else {
1204 wpa_printf(MSG_INFO, "TLS: Invalid altSubjectName "
1205 "match '%s'", pos);
1206 return 0;
1207 }
1208 end = os_strchr(pos, ';');
1209 while (end) {
1210 if (os_strncmp(end + 1, "EMAIL:", 6) == 0 ||
1211 os_strncmp(end + 1, "DNS:", 4) == 0 ||
1212 os_strncmp(end + 1, "URI:", 4) == 0)
1213 break;
1214 end = os_strchr(end + 1, ';');
1215 }
1216 if (end)
1217 len = end - pos;
1218 else
1219 len = os_strlen(pos);
1220 if (tls_match_altsubject_component(cert, type, pos, len) > 0)
1221 return 1;
1222 pos = end + 1;
1223 } while (end);
1224
1225 return 0;
1226}
1227
1228
461e3ebe 1229#ifndef CONFIG_NATIVE_WINDOWS
cebee30f
JM		 1230static int domain_suffix_match(const u8 *val, size_t len, const char *match,
1231 int full)
01f809c7
JM		 1232{
1233 size_t i, match_len;
1234
1235 /* Check for embedded nuls that could mess up suffix matching */
1236 for (i = 0; i < len; i++) {
1237 if (val[i] == '\0') {
1238 wpa_printf(MSG_DEBUG, "TLS: Embedded null in a string - reject");
1239 return 0;
1240 }
1241 }
1242
1243 match_len = os_strlen(match);
cebee30f 1244 if (match_len > len || (full && match_len != len))
01f809c7
JM		 1245 return 0;
1246
1247 if (os_strncasecmp((const char *) val + len - match_len, match,
1248 match_len) != 0)
1249 return 0; /* no match */
1250
1251 if (match_len == len)
1252 return 1; /* exact match */
1253
1254 if (val[len - match_len - 1] == '.')
1255 return 1; /* full label match completes suffix match */
1256
1257 wpa_printf(MSG_DEBUG, "TLS: Reject due to incomplete label match");
1258 return 0;
1259}
461e3ebe 1260#endif /* CONFIG_NATIVE_WINDOWS */
01f809c7
JM		 1261
1262
cebee30f 1263static int tls_match_suffix(X509 *cert, const char *match, int full)
01f809c7 1264{
461e3ebe
JM		 1265#ifdef CONFIG_NATIVE_WINDOWS
1266 /* wincrypt.h has conflicting X509_NAME definition */
1267 return -1;
1268#else /* CONFIG_NATIVE_WINDOWS */
01f809c7
JM		 1269 GENERAL_NAME *gen;
1270 void *ext;
1271 int i;
98a1571d 1272 stack_index_t j;
01f809c7
JM		 1273 int dns_name = 0;
1274 X509_NAME *name;
1275
cebee30f
JM		 1276 wpa_printf(MSG_DEBUG, "TLS: Match domain against %s%s",
1277 full ? "": "suffix ", match);
01f809c7
JM		 1278
1279 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
1280
98a1571d
JM		 1281 for (j = 0; ext && j < sk_GENERAL_NAME_num(ext); j++) {
1282 gen = sk_GENERAL_NAME_value(ext, j);
01f809c7
JM		 1283 if (gen->type != GEN_DNS)
1284 continue;
1285 dns_name++;
1286 wpa_hexdump_ascii(MSG_DEBUG, "TLS: Certificate dNSName",
1287 gen->d.dNSName->data,
1288 gen->d.dNSName->length);
1289 if (domain_suffix_match(gen->d.dNSName->data,
cebee30f
JM		 1290 gen->d.dNSName->length, match, full) ==
1291 1) {
1292 wpa_printf(MSG_DEBUG, "TLS: %s in dNSName found",
1293 full ? "Match" : "Suffix match");
01f809c7
JM		 1294 return 1;
1295 }
1296 }
1297
1298 if (dns_name) {
1299 wpa_printf(MSG_DEBUG, "TLS: None of the dNSName(s) matched");
1300 return 0;
1301 }
1302
1303 name = X509_get_subject_name(cert);
1304 i = -1;
1305 for (;;) {
1306 X509_NAME_ENTRY *e;
1307 ASN1_STRING *cn;
1308
1309 i = X509_NAME_get_index_by_NID(name, NID_commonName, i);
1310 if (i == -1)
1311 break;
1312 e = X509_NAME_get_entry(name, i);
1313 if (e == NULL)
1314 continue;
1315 cn = X509_NAME_ENTRY_get_data(e);
1316 if (cn == NULL)
1317 continue;
1318 wpa_hexdump_ascii(MSG_DEBUG, "TLS: Certificate commonName",
1319 cn->data, cn->length);
cebee30f
JM		 1320 if (domain_suffix_match(cn->data, cn->length, match, full) == 1)
1321 {
1322 wpa_printf(MSG_DEBUG, "TLS: %s in commonName found",
1323 full ? "Match" : "Suffix match");
01f809c7
JM		 1324 return 1;
1325 }
1326 }
1327
cebee30f
JM		 1328 wpa_printf(MSG_DEBUG, "TLS: No CommonName %smatch found",
1329 full ? "": "suffix ");
01f809c7 1330 return 0;
461e3ebe 1331#endif /* CONFIG_NATIVE_WINDOWS */
01f809c7
JM		 1332}
1333
1334
00468b46
JM		 1335static enum tls_fail_reason openssl_tls_fail_reason(int err)
1336{
1337 switch (err) {
1338 case X509_V_ERR_CERT_REVOKED:
1339 return TLS_FAIL_REVOKED;
1340 case X509_V_ERR_CERT_NOT_YET_VALID:
1341 case X509_V_ERR_CRL_NOT_YET_VALID:
1342 return TLS_FAIL_NOT_YET_VALID;
1343 case X509_V_ERR_CERT_HAS_EXPIRED:
1344 case X509_V_ERR_CRL_HAS_EXPIRED:
1345 return TLS_FAIL_EXPIRED;
1346 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
1347 case X509_V_ERR_UNABLE_TO_GET_CRL:
1348 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
1349 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
1350 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
1351 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
1352 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
1353 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
1354 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
1355 case X509_V_ERR_INVALID_CA:
1356 return TLS_FAIL_UNTRUSTED;
1357 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
1358 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
1359 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
1360 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
1361 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
1362 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
1363 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
1364 case X509_V_ERR_CERT_UNTRUSTED:
1365 case X509_V_ERR_CERT_REJECTED:
1366 return TLS_FAIL_BAD_CERTIFICATE;
1367 default:
1368 return TLS_FAIL_UNSPECIFIED;
1369 }
1370}
1371
1372
1373static struct wpabuf * get_x509_cert(X509 *cert)
1374{
1375 struct wpabuf *buf;
1376 u8 *tmp;
1377
1378 int cert_len = i2d_X509(cert, NULL);
1379 if (cert_len <= 0)
1380 return NULL;
1381
1382 buf = wpabuf_alloc(cert_len);
1383 if (buf == NULL)
1384 return NULL;
1385
1386 tmp = wpabuf_put(buf, cert_len);
1387 i2d_X509(cert, &tmp);
1388 return buf;
1389}
1390
1391
1392static void openssl_tls_fail_event(struct tls_connection *conn,
1393 X509 *err_cert, int err, int depth,
1394 const char *subject, const char *err_str,
1395 enum tls_fail_reason reason)
1396{
1397 union tls_event_data ev;
1398 struct wpabuf *cert = NULL;
7c0e1e27 1399 struct tls_context *context = conn->context;
00468b46 1400
7c0e1e27 1401 if (context->event_cb == NULL)
00468b46
JM		 1402 return;
1403
1404 cert = get_x509_cert(err_cert);
1405 os_memset(&ev, 0, sizeof(ev));
1406 ev.cert_fail.reason = reason != TLS_FAIL_UNSPECIFIED ?
1407 reason : openssl_tls_fail_reason(err);
1408 ev.cert_fail.depth = depth;
1409 ev.cert_fail.subject = subject;
1410 ev.cert_fail.reason_txt = err_str;
1411 ev.cert_fail.cert = cert;
7c0e1e27 1412 context->event_cb(context->cb_ctx, TLS_CERT_CHAIN_FAILURE, &ev);
00468b46
JM		 1413 wpabuf_free(cert);
1414}
1415
1416
1417static void openssl_tls_cert_event(struct tls_connection *conn,
1418 X509 *err_cert, int depth,
1419 const char *subject)
1420{
1421 struct wpabuf *cert = NULL;
1422 union tls_event_data ev;
7c0e1e27 1423 struct tls_context *context = conn->context;
d07d3fbd
JM		 1424 char *altsubject[TLS_MAX_ALT_SUBJECT];
1425 int alt, num_altsubject = 0;
1426 GENERAL_NAME *gen;
1427 void *ext;
1428 stack_index_t i;
00468b46
JM		 1429#ifdef CONFIG_SHA256
1430 u8 hash[32];
1431#endif /* CONFIG_SHA256 */
1432
7c0e1e27 1433 if (context->event_cb == NULL)
00468b46
JM		 1434 return;
1435
1436 os_memset(&ev, 0, sizeof(ev));
7c0e1e27 1437 if (conn->cert_probe || context->cert_in_cb) {
00468b46
JM		 1438 cert = get_x509_cert(err_cert);
1439 ev.peer_cert.cert = cert;
1440 }
1441#ifdef CONFIG_SHA256
1442 if (cert) {
1443 const u8 *addr[1];
1444 size_t len[1];
1445 addr[0] = wpabuf_head(cert);
1446 len[0] = wpabuf_len(cert);
1447 if (sha256_vector(1, addr, len, hash) == 0) {
1448 ev.peer_cert.hash = hash;
1449 ev.peer_cert.hash_len = sizeof(hash);
1450 }
1451 }
1452#endif /* CONFIG_SHA256 */
1453 ev.peer_cert.depth = depth;
1454 ev.peer_cert.subject = subject;
d07d3fbd
JM		 1455
1456 ext = X509_get_ext_d2i(err_cert, NID_subject_alt_name, NULL, NULL);
1457 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
1458 char *pos;
1459
1460 if (num_altsubject == TLS_MAX_ALT_SUBJECT)
1461 break;
1462 gen = sk_GENERAL_NAME_value(ext, i);
1463 if (gen->type != GEN_EMAIL &&
1464 gen->type != GEN_DNS &&
1465 gen->type != GEN_URI)
1466 continue;
1467
1468 pos = os_malloc(10 + gen->d.ia5->length + 1);
1469 if (pos == NULL)
1470 break;
1471 altsubject[num_altsubject++] = pos;
1472
1473 switch (gen->type) {
1474 case GEN_EMAIL:
1475 os_memcpy(pos, "EMAIL:", 6);
1476 pos += 6;
1477 break;
1478 case GEN_DNS:
1479 os_memcpy(pos, "DNS:", 4);
1480 pos += 4;
1481 break;
1482 case GEN_URI:
1483 os_memcpy(pos, "URI:", 4);
1484 pos += 4;
1485 break;
1486 }
1487
1488 os_memcpy(pos, gen->d.ia5->data, gen->d.ia5->length);
1489 pos += gen->d.ia5->length;
1490 *pos = '\0';
1491 }
1492
1493 for (alt = 0; alt < num_altsubject; alt++)
1494 ev.peer_cert.altsubject[alt] = altsubject[alt];
1495 ev.peer_cert.num_altsubject = num_altsubject;
1496
7c0e1e27 1497 context->event_cb(context->cb_ctx, TLS_PEER_CERTIFICATE, &ev);
00468b46 1498 wpabuf_free(cert);
d07d3fbd
JM		 1499 for (alt = 0; alt < num_altsubject; alt++)
1500 os_free(altsubject[alt]);
00468b46
JM		 1501}
1502
1503
6fc6879b
JM		 1504static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
1505{
1506 char buf[256];
1507 X509 *err_cert;
1508 int err, depth;
1509 SSL *ssl;
1510 struct tls_connection *conn;
7c0e1e27 1511 struct tls_context *context;
cebee30f 1512 char *match, *altmatch, *suffix_match, *domain_match;
00468b46 1513 const char *err_str;
6fc6879b
JM		 1514
1515 err_cert = X509_STORE_CTX_get_current_cert(x509_ctx);
97efe70b
EL		 1516 if (!err_cert)
1517 return 0;
1518
6fc6879b
JM		 1519 err = X509_STORE_CTX_get_error(x509_ctx);
1520 depth = X509_STORE_CTX_get_error_depth(x509_ctx);
1521 ssl = X509_STORE_CTX_get_ex_data(x509_ctx,
1522 SSL_get_ex_data_X509_STORE_CTX_idx());
1523 X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf));
1524
1525 conn = SSL_get_app_data(ssl);
0bdaa741
JM		 1526 if (conn == NULL)
1527 return 0;
080585c0
JM		 1528
1529 if (depth == 0)
1530 conn->peer_cert = err_cert;
1531 else if (depth == 1)
1532 conn->peer_issuer = err_cert;
6bf61fb2
JM		 1533 else if (depth == 2)
1534 conn->peer_issuer_issuer = err_cert;
080585c0 1535
7c0e1e27 1536 context = conn->context;
0bdaa741
JM		 1537 match = conn->subject_match;
1538 altmatch = conn->altsubject_match;
01f809c7 1539 suffix_match = conn->suffix_match;
cebee30f 1540 domain_match = conn->domain_match;
6fc6879b 1541
00468b46
JM		 1542 if (!preverify_ok && !conn->ca_cert_verify)
1543 preverify_ok = 1;
1544 if (!preverify_ok && depth > 0 && conn->server_cert_only)
1545 preverify_ok = 1;
235279e7
JM		 1546 if (!preverify_ok && (conn->flags & TLS_CONN_DISABLE_TIME_CHECKS) &&
1547 (err == X509_V_ERR_CERT_HAS_EXPIRED ||
1548 err == X509_V_ERR_CERT_NOT_YET_VALID)) {
1549 wpa_printf(MSG_DEBUG, "OpenSSL: Ignore certificate validity "
1550 "time mismatch");
1551 preverify_ok = 1;
1552 }
00468b46
JM		 1553
1554 err_str = X509_verify_cert_error_string(err);
1555
1556#ifdef CONFIG_SHA256
00033a09
RA		 1557 /*
1558 * Do not require preverify_ok so we can explicity allow otherwise
1559 * invalid pinned server certificates.
1560 */
1561 if (depth == 0 && conn->server_cert_only) {
00468b46
JM		 1562 struct wpabuf *cert;
1563 cert = get_x509_cert(err_cert);
1564 if (!cert) {
1565 wpa_printf(MSG_DEBUG, "OpenSSL: Could not fetch "
1566 "server certificate data");
6fc6879b 1567 preverify_ok = 0;
00468b46
JM		 1568 } else {
1569 u8 hash[32];
1570 const u8 *addr[1];
1571 size_t len[1];
1572 addr[0] = wpabuf_head(cert);
1573 len[0] = wpabuf_len(cert);
1574 if (sha256_vector(1, addr, len, hash) < 0 ||
1575 os_memcmp(conn->srv_cert_hash, hash, 32) != 0) {
1576 err_str = "Server certificate mismatch";
1577 err = X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN;
1578 preverify_ok = 0;
00033a09
RA		 1579 } else if (!preverify_ok) {
1580 /*
1581 * Certificate matches pinned certificate, allow
1582 * regardless of other problems.
1583 */
1584 wpa_printf(MSG_DEBUG,
1585 "OpenSSL: Ignore validation issues for a pinned server certificate");
1586 preverify_ok = 1;
00468b46
JM		 1587 }
1588 wpabuf_free(cert);
6fc6879b
JM		 1589 }
1590 }
00468b46
JM		 1591#endif /* CONFIG_SHA256 */
1592
1593 if (!preverify_ok) {
1594 wpa_printf(MSG_WARNING, "TLS: Certificate verification failed,"
1595 " error %d (%s) depth %d for '%s'", err, err_str,
1596 depth, buf);
1597 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1598 err_str, TLS_FAIL_UNSPECIFIED);
1599 return preverify_ok;
1600 }
1601
1602 wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - preverify_ok=%d "
1603 "err=%d (%s) ca_cert_verify=%d depth=%d buf='%s'",
1604 preverify_ok, err, err_str,
1605 conn->ca_cert_verify, depth, buf);
1606 if (depth == 0 && match && os_strstr(buf, match) == NULL) {
1607 wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not "
1608 "match with '%s'", buf, match);
1609 preverify_ok = 0;
1610 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1611 "Subject mismatch",
1612 TLS_FAIL_SUBJECT_MISMATCH);
1613 } else if (depth == 0 && altmatch &&
1614 !tls_match_altsubject(err_cert, altmatch)) {
1615 wpa_printf(MSG_WARNING, "TLS: altSubjectName match "
1616 "'%s' not found", altmatch);
1617 preverify_ok = 0;
1618 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1619 "AltSubject mismatch",
1620 TLS_FAIL_ALTSUBJECT_MISMATCH);
01f809c7 1621 } else if (depth == 0 && suffix_match &&
cebee30f 1622 !tls_match_suffix(err_cert, suffix_match, 0)) {
01f809c7
JM		 1623 wpa_printf(MSG_WARNING, "TLS: Domain suffix match '%s' not found",
1624 suffix_match);
1625 preverify_ok = 0;
1626 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1627 "Domain suffix mismatch",
1628 TLS_FAIL_DOMAIN_SUFFIX_MISMATCH);
cebee30f
JM		 1629 } else if (depth == 0 && domain_match &&
1630 !tls_match_suffix(err_cert, domain_match, 1)) {
1631 wpa_printf(MSG_WARNING, "TLS: Domain match '%s' not found",
1632 domain_match);
1633 preverify_ok = 0;
1634 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1635 "Domain mismatch",
1636 TLS_FAIL_DOMAIN_MISMATCH);
00468b46
JM		 1637 } else
1638 openssl_tls_cert_event(conn, err_cert, depth, buf);
1639
1640 if (conn->cert_probe && preverify_ok && depth == 0) {
1641 wpa_printf(MSG_DEBUG, "OpenSSL: Reject server certificate "
1642 "on probe-only run");
1643 preverify_ok = 0;
1644 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1645 "Server certificate chain probe",
1646 TLS_FAIL_SERVER_CHAIN_PROBE);
1647 }
6fc6879b 1648
7c0e1e27
PS		 1649 if (preverify_ok && context->event_cb != NULL)
1650 context->event_cb(context->cb_ctx,
1651 TLS_CERT_CHAIN_SUCCESS, NULL);
dd7fec1f 1652
6fc6879b
JM		 1653 return preverify_ok;
1654}
1655
1656
1657#ifndef OPENSSL_NO_STDIO
bd9b8b2b 1658static int tls_load_ca_der(struct tls_data *data, const char *ca_cert)
6fc6879b 1659{
bd9b8b2b 1660 SSL_CTX *ssl_ctx = data->ssl;
6fc6879b
JM		 1661 X509_LOOKUP *lookup;
1662 int ret = 0;
1663
68ae4773 1664 lookup = X509_STORE_add_lookup(SSL_CTX_get_cert_store(ssl_ctx),
6fc6879b
JM		 1665 X509_LOOKUP_file());
1666 if (lookup == NULL) {
1667 tls_show_errors(MSG_WARNING, __func__,
1668 "Failed add lookup for X509 store");
1669 return -1;
1670 }
1671
1672 if (!X509_LOOKUP_load_file(lookup, ca_cert, X509_FILETYPE_ASN1)) {
1673 unsigned long err = ERR_peek_error();
1674 tls_show_errors(MSG_WARNING, __func__,
1675 "Failed load CA in DER format");
1676 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1677 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1678 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1679 "cert already in hash table error",
1680 __func__);
1681 } else
1682 ret = -1;
1683 }
1684
1685 return ret;
1686}
1687#endif /* OPENSSL_NO_STDIO */
1688
1689
bd9b8b2b
JM		 1690static int tls_connection_ca_cert(struct tls_data *data,
1691 struct tls_connection *conn,
6fc6879b
JM		 1692 const char *ca_cert, const u8 *ca_cert_blob,
1693 size_t ca_cert_blob_len, const char *ca_path)
1694{
bd9b8b2b 1695 SSL_CTX *ssl_ctx = data->ssl;
68ae4773 1696 X509_STORE *store;
6fc6879b
JM		 1697
1698 /*
1699 * Remove previously configured trusted CA certificates before adding
1700 * new ones.
1701 */
68ae4773
JM		 1702 store = X509_STORE_new();
1703 if (store == NULL) {
6fc6879b
JM		 1704 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
1705 "certificate store", __func__);
1706 return -1;
1707 }
68ae4773 1708 SSL_CTX_set_cert_store(ssl_ctx, store);
6fc6879b 1709
00468b46
JM		 1710 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1711 conn->ca_cert_verify = 1;
1712
1713 if (ca_cert && os_strncmp(ca_cert, "probe://", 8) == 0) {
1714 wpa_printf(MSG_DEBUG, "OpenSSL: Probe for server certificate "
1715 "chain");
1716 conn->cert_probe = 1;
1717 conn->ca_cert_verify = 0;
1718 return 0;
1719 }
1720
1721 if (ca_cert && os_strncmp(ca_cert, "hash://", 7) == 0) {
1722#ifdef CONFIG_SHA256
1723 const char *pos = ca_cert + 7;
1724 if (os_strncmp(pos, "server/sha256/", 14) != 0) {
1725 wpa_printf(MSG_DEBUG, "OpenSSL: Unsupported ca_cert "
1726 "hash value '%s'", ca_cert);
1727 return -1;
1728 }
1729 pos += 14;
1730 if (os_strlen(pos) != 32 * 2) {
1731 wpa_printf(MSG_DEBUG, "OpenSSL: Unexpected SHA256 "
1732 "hash length in ca_cert '%s'", ca_cert);
1733 return -1;
1734 }
1735 if (hexstr2bin(pos, conn->srv_cert_hash, 32) < 0) {
1736 wpa_printf(MSG_DEBUG, "OpenSSL: Invalid SHA256 hash "
1737 "value in ca_cert '%s'", ca_cert);
1738 return -1;
1739 }
1740 conn->server_cert_only = 1;
1741 wpa_printf(MSG_DEBUG, "OpenSSL: Checking only server "
1742 "certificate match");
1743 return 0;
1744#else /* CONFIG_SHA256 */
1745 wpa_printf(MSG_INFO, "No SHA256 included in the build - "
1746 "cannot validate server certificate hash");
1747 return -1;
1748#endif /* CONFIG_SHA256 */
1749 }
1750
6fc6879b 1751 if (ca_cert_blob) {
fee31f76
JM		 1752 X509 *cert = d2i_X509(NULL,
1753 (const unsigned char **) &ca_cert_blob,
6fc6879b
JM		 1754 ca_cert_blob_len);
1755 if (cert == NULL) {
1756 tls_show_errors(MSG_WARNING, __func__,
1757 "Failed to parse ca_cert_blob");
1758 return -1;
1759 }
1760
68ae4773
JM		 1761 if (!X509_STORE_add_cert(SSL_CTX_get_cert_store(ssl_ctx),
1762 cert)) {
6fc6879b
JM		 1763 unsigned long err = ERR_peek_error();
1764 tls_show_errors(MSG_WARNING, __func__,
1765 "Failed to add ca_cert_blob to "
1766 "certificate store");
1767 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1768 ERR_GET_REASON(err) ==
1769 X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1770 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1771 "cert already in hash table error",
1772 __func__);
1773 } else {
1774 X509_free(cert);
1775 return -1;
1776 }
1777 }
1778 X509_free(cert);
1779 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob "
1780 "to certificate store", __func__);
6fc6879b
JM		 1781 return 0;
1782 }
1783
2a0cd067
DS		 1784#ifdef ANDROID
1785 if (ca_cert && os_strncmp("keystore://", ca_cert, 11) == 0) {
1786 BIO *bio = BIO_from_keystore(&ca_cert[11]);
1787 STACK_OF(X509_INFO) *stack = NULL;
a8572960 1788 stack_index_t i;
2a0cd067
DS		 1789
1790 if (bio) {
1791 stack = PEM_X509_INFO_read_bio(bio, NULL, NULL, NULL);
1792 BIO_free(bio);
1793 }
1794 if (!stack)
1795 return -1;
1796
1797 for (i = 0; i < sk_X509_INFO_num(stack); ++i) {
1798 X509_INFO *info = sk_X509_INFO_value(stack, i);
1799 if (info->x509) {
1800 X509_STORE_add_cert(ssl_ctx->cert_store,
1801 info->x509);
1802 }
1803 if (info->crl) {
1804 X509_STORE_add_crl(ssl_ctx->cert_store,
1805 info->crl);
1806 }
1807 }
1808 sk_X509_INFO_pop_free(stack, X509_INFO_free);
1809 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1810 return 0;
1811 }
1812#endif /* ANDROID */
1813
6fc6879b
JM		 1814#ifdef CONFIG_NATIVE_WINDOWS
1815 if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) ==
1816 0) {
1817 wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from "
1818 "system certificate store");
6fc6879b
JM		 1819 return 0;
1820 }
1821#endif /* CONFIG_NATIVE_WINDOWS */
1822
1823 if (ca_cert || ca_path) {
1824#ifndef OPENSSL_NO_STDIO
1825 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) !=
1826 1) {
1827 tls_show_errors(MSG_WARNING, __func__,
1828 "Failed to load root certificates");
1829 if (ca_cert &&
bd9b8b2b 1830 tls_load_ca_der(data, ca_cert) == 0) {
6fc6879b
JM		 1831 wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded "
1832 "DER format CA certificate",
1833 __func__);
1834 } else
1835 return -1;
1836 } else {
1837 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1838 "certificate(s) loaded");
bd9b8b2b 1839 tls_get_errors(data);
6fc6879b 1840 }
6fc6879b
JM		 1841#else /* OPENSSL_NO_STDIO */
1842 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
1843 __func__);
1844 return -1;
1845#endif /* OPENSSL_NO_STDIO */
1846 } else {
1847 /* No ca_cert configured - do not try to verify server
1848 * certificate */
00468b46 1849 conn->ca_cert_verify = 0;
6fc6879b
JM		 1850 }
1851
1852 return 0;
1853}
1854
1855
bd9b8b2b 1856static int tls_global_ca_cert(struct tls_data *data, const char *ca_cert)
6fc6879b 1857{
bd9b8b2b
JM		 1858 SSL_CTX *ssl_ctx = data->ssl;
1859
6fc6879b
JM		 1860 if (ca_cert) {
1861 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1)
1862 {
1863 tls_show_errors(MSG_WARNING, __func__,
1864 "Failed to load root certificates");
1865 return -1;
1866 }
1867
1868 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1869 "certificate(s) loaded");
1870
1871#ifndef OPENSSL_NO_STDIO
1872 /* Add the same CAs to the client certificate requests */
1873 SSL_CTX_set_client_CA_list(ssl_ctx,
1874 SSL_load_client_CA_file(ca_cert));
1875#endif /* OPENSSL_NO_STDIO */
1876 }
1877
1878 return 0;
1879}
1880
1881
1882int tls_global_set_verify(void *ssl_ctx, int check_crl)
1883{
1884 int flags;
1885
1886 if (check_crl) {
bd9b8b2b
JM		 1887 struct tls_data *data = ssl_ctx;
1888 X509_STORE *cs = SSL_CTX_get_cert_store(data->ssl);
6fc6879b
JM		 1889 if (cs == NULL) {
1890 tls_show_errors(MSG_INFO, __func__, "Failed to get "
1891 "certificate store when enabling "
1892 "check_crl");
1893 return -1;
1894 }
1895 flags = X509_V_FLAG_CRL_CHECK;
1896 if (check_crl == 2)
1897 flags |= X509_V_FLAG_CRL_CHECK_ALL;
1898 X509_STORE_set_flags(cs, flags);
1899 }
1900 return 0;
1901}
1902
1903
1904static int tls_connection_set_subject_match(struct tls_connection *conn,
1905 const char *subject_match,
01f809c7 1906 const char *altsubject_match,
cebee30f
JM		 1907 const char *suffix_match,
1908 const char *domain_match)
6fc6879b
JM		 1909{
1910 os_free(conn->subject_match);
1911 conn->subject_match = NULL;
1912 if (subject_match) {
1913 conn->subject_match = os_strdup(subject_match);
1914 if (conn->subject_match == NULL)
1915 return -1;
1916 }
1917
1918 os_free(conn->altsubject_match);
1919 conn->altsubject_match = NULL;
1920 if (altsubject_match) {
1921 conn->altsubject_match = os_strdup(altsubject_match);
1922 if (conn->altsubject_match == NULL)
1923 return -1;
1924 }
1925
01f809c7
JM		 1926 os_free(conn->suffix_match);
1927 conn->suffix_match = NULL;
1928 if (suffix_match) {
1929 conn->suffix_match = os_strdup(suffix_match);
1930 if (conn->suffix_match == NULL)
1931 return -1;
1932 }
1933
cebee30f
JM		 1934 os_free(conn->domain_match);
1935 conn->domain_match = NULL;
1936 if (domain_match) {
1937 conn->domain_match = os_strdup(domain_match);
1938 if (conn->domain_match == NULL)
1939 return -1;
1940 }
1941
6fc6879b
JM		 1942 return 0;
1943}
1944
1945
93bc6549
JM		 1946static void tls_set_conn_flags(SSL *ssl, unsigned int flags)
1947{
1948#ifdef SSL_OP_NO_TICKET
1949 if (flags & TLS_CONN_DISABLE_SESSION_TICKET)
1950 SSL_set_options(ssl, SSL_OP_NO_TICKET);
1951#ifdef SSL_clear_options
1952 else
1953 SSL_clear_options(ssl, SSL_OP_NO_TICKET);
1954#endif /* SSL_clear_options */
1955#endif /* SSL_OP_NO_TICKET */
1956
1957#ifdef SSL_OP_NO_TLSv1
1958 if (flags & TLS_CONN_DISABLE_TLSv1_0)
1959 SSL_set_options(ssl, SSL_OP_NO_TLSv1);
1960 else
1961 SSL_clear_options(ssl, SSL_OP_NO_TLSv1);
1962#endif /* SSL_OP_NO_TLSv1 */
1963#ifdef SSL_OP_NO_TLSv1_1
1964 if (flags & TLS_CONN_DISABLE_TLSv1_1)
1965 SSL_set_options(ssl, SSL_OP_NO_TLSv1_1);
1966 else
1967 SSL_clear_options(ssl, SSL_OP_NO_TLSv1_1);
1968#endif /* SSL_OP_NO_TLSv1_1 */
1969#ifdef SSL_OP_NO_TLSv1_2
1970 if (flags & TLS_CONN_DISABLE_TLSv1_2)
1971 SSL_set_options(ssl, SSL_OP_NO_TLSv1_2);
1972 else
1973 SSL_clear_options(ssl, SSL_OP_NO_TLSv1_2);
1974#endif /* SSL_OP_NO_TLSv1_2 */
1975}
1976
1977
6fc6879b 1978int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn,
bfbebd26
JM		 1979 int verify_peer, unsigned int flags,
1980 const u8 *session_ctx, size_t session_ctx_len)
6fc6879b 1981{
bf206cad
JM		 1982 static int counter = 0;
1983
6fc6879b
JM		 1984 if (conn == NULL)
1985 return -1;
1986
1987 if (verify_peer) {
00468b46 1988 conn->ca_cert_verify = 1;
6fc6879b
JM		 1989 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER |
1990 SSL_VERIFY_FAIL_IF_NO_PEER_CERT |
1991 SSL_VERIFY_CLIENT_ONCE, tls_verify_cb);
1992 } else {
00468b46 1993 conn->ca_cert_verify = 0;
6fc6879b
JM		 1994 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
1995 }
1996
93bc6549
JM		 1997 tls_set_conn_flags(conn->ssl, flags);
1998 conn->flags = flags;
1999
6fc6879b
JM		 2000 SSL_set_accept_state(conn->ssl);
2001
bf206cad
JM		 2002 /*
2003 * Set session id context in order to avoid fatal errors when client
2004 * tries to resume a session. However, set the context to a unique
2005 * value in order to effectively disable session resumption for now
2006 * since not all areas of the server code are ready for it (e.g.,
2007 * EAP-TTLS needs special handling for Phase 2 after abbreviated TLS
2008 * handshake).
2009 */
2010 counter++;
2011 SSL_set_session_id_context(conn->ssl,
2012 (const unsigned char *) &counter,
2013 sizeof(counter));
2014
6fc6879b
JM		 2015 return 0;
2016}
2017
2018
2019static int tls_connection_client_cert(struct tls_connection *conn,
2020 const char *client_cert,
2021 const u8 *client_cert_blob,
2022 size_t client_cert_blob_len)
2023{
2024 if (client_cert == NULL && client_cert_blob == NULL)
2025 return 0;
2026
2027 if (client_cert_blob &&
2028 SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob,
2029 client_cert_blob_len) == 1) {
2030 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> "
2031 "OK");
2032 return 0;
2033 } else if (client_cert_blob) {
2034 tls_show_errors(MSG_DEBUG, __func__,
2035 "SSL_use_certificate_ASN1 failed");
2036 }
2037
2038 if (client_cert == NULL)
2039 return -1;
2040
2a0cd067
DS		 2041#ifdef ANDROID
2042 if (os_strncmp("keystore://", client_cert, 11) == 0) {
2043 BIO *bio = BIO_from_keystore(&client_cert[11]);
2044 X509 *x509 = NULL;
2045 int ret = -1;
2046 if (bio) {
2047 x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL);
2048 BIO_free(bio);
2049 }
2050 if (x509) {
2051 if (SSL_use_certificate(conn->ssl, x509) == 1)
2052 ret = 0;
2053 X509_free(x509);
2054 }
2055 return ret;
2056 }
2057#endif /* ANDROID */
2058
6fc6879b
JM		 2059#ifndef OPENSSL_NO_STDIO
2060 if (SSL_use_certificate_file(conn->ssl, client_cert,
2061 SSL_FILETYPE_ASN1) == 1) {
2062 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)"
2063 " --> OK");
2064 return 0;
6fc6879b
JM		 2065 }
2066
2067 if (SSL_use_certificate_file(conn->ssl, client_cert,
2068 SSL_FILETYPE_PEM) == 1) {
effab86f 2069 ERR_clear_error();
6fc6879b
JM		 2070 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)"
2071 " --> OK");
2072 return 0;
6fc6879b 2073 }
effab86f
JM		 2074
2075 tls_show_errors(MSG_DEBUG, __func__,
2076 "SSL_use_certificate_file failed");
6fc6879b
JM		 2077#else /* OPENSSL_NO_STDIO */
2078 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
2079#endif /* OPENSSL_NO_STDIO */
2080
2081 return -1;
2082}
2083
2084
bd9b8b2b
JM		 2085static int tls_global_client_cert(struct tls_data *data,
2086 const char *client_cert)
6fc6879b
JM		 2087{
2088#ifndef OPENSSL_NO_STDIO
bd9b8b2b
JM		 2089 SSL_CTX *ssl_ctx = data->ssl;
2090
6fc6879b
JM		 2091 if (client_cert == NULL)
2092 return 0;
2093
2094 if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
2095 SSL_FILETYPE_ASN1) != 1 &&
65897747 2096 SSL_CTX_use_certificate_chain_file(ssl_ctx, client_cert) != 1 &&
6fc6879b
JM		 2097 SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
2098 SSL_FILETYPE_PEM) != 1) {
2099 tls_show_errors(MSG_INFO, __func__,
2100 "Failed to load client certificate");
2101 return -1;
2102 }
2103 return 0;
2104#else /* OPENSSL_NO_STDIO */
2105 if (client_cert == NULL)
2106 return 0;
2107 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
2108 return -1;
2109#endif /* OPENSSL_NO_STDIO */
2110}
2111
2112
2113static int tls_passwd_cb(char *buf, int size, int rwflag, void *password)
2114{
2115 if (password == NULL) {
2116 return 0;
2117 }
2118 os_strlcpy(buf, (char *) password, size);
2119 return os_strlen(buf);
2120}
2121
2122
2123#ifdef PKCS12_FUNCS
bd9b8b2b 2124static int tls_parse_pkcs12(struct tls_data *data, SSL *ssl, PKCS12 *p12,
6fc6879b
JM		 2125 const char *passwd)
2126{
2127 EVP_PKEY *pkey;
2128 X509 *cert;
2129 STACK_OF(X509) *certs;
2130 int res = 0;
2131 char buf[256];
2132
2133 pkey = NULL;
2134 cert = NULL;
2135 certs = NULL;
c07e7b43
JM		 2136 if (!passwd)
2137 passwd = "";
6fc6879b
JM		 2138 if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) {
2139 tls_show_errors(MSG_DEBUG, __func__,
2140 "Failed to parse PKCS12 file");
2141 PKCS12_free(p12);
2142 return -1;
2143 }
2144 wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data");
2145
2146 if (cert) {
2147 X509_NAME_oneline(X509_get_subject_name(cert), buf,
2148 sizeof(buf));
2149 wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: "
2150 "subject='%s'", buf);
2151 if (ssl) {
2152 if (SSL_use_certificate(ssl, cert) != 1)
2153 res = -1;
2154 } else {
bd9b8b2b 2155 if (SSL_CTX_use_certificate(data->ssl, cert) != 1)
6fc6879b
JM		 2156 res = -1;
2157 }
2158 X509_free(cert);
2159 }
2160
2161 if (pkey) {
2162 wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12");
2163 if (ssl) {
2164 if (SSL_use_PrivateKey(ssl, pkey) != 1)
2165 res = -1;
2166 } else {
bd9b8b2b 2167 if (SSL_CTX_use_PrivateKey(data->ssl, pkey) != 1)
6fc6879b
JM		 2168 res = -1;
2169 }
2170 EVP_PKEY_free(pkey);
2171 }
2172
2173 if (certs) {
de2a7b79
JM		 2174#if OPENSSL_VERSION_NUMBER >= 0x10002000L
2175 SSL_clear_chain_certs(ssl);
2176 while ((cert = sk_X509_pop(certs)) != NULL) {
2177 X509_NAME_oneline(X509_get_subject_name(cert), buf,
2178 sizeof(buf));
2179 wpa_printf(MSG_DEBUG, "TLS: additional certificate"
2180 " from PKCS12: subject='%s'", buf);
2181 if (SSL_add1_chain_cert(ssl, cert) != 1) {
2182 res = -1;
2183 break;
2184 }
2185 }
2186 sk_X509_free(certs);
226cdea6 2187#ifndef OPENSSL_IS_BORINGSSL
de2a7b79
JM		 2188 res = SSL_build_cert_chain(ssl,
2189 SSL_BUILD_CHAIN_FLAG_CHECK |
2190 SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR);
2191 if (!res) {
2192 tls_show_errors(MSG_DEBUG, __func__,
2193 "Failed to build certificate chain");
2194 } else if (res == 2) {
2195 wpa_printf(MSG_DEBUG,
2196 "TLS: Ignore certificate chain verification error when building chain with PKCS#12 extra certificates");
2197 }
226cdea6 2198#endif /* OPENSSL_IS_BORINGSSL */
de2a7b79
JM		 2199 /*
2200 * Try to continue regardless of result since it is possible for
2201 * the extra certificates not to be required.
2202 */
2203 res = 0;
2204#else /* OPENSSL_VERSION_NUMBER >= 0x10002000L */
0d2c0e67 2205#if OPENSSL_VERSION_NUMBER >= 0x10001000L
bd9b8b2b 2206 SSL_CTX_clear_extra_chain_certs(data->ssl);
0d2c0e67 2207#endif /* OPENSSL_VERSION_NUMBER >= 0x10001000L */
6fc6879b
JM		 2208 while ((cert = sk_X509_pop(certs)) != NULL) {
2209 X509_NAME_oneline(X509_get_subject_name(cert), buf,
2210 sizeof(buf));
2211 wpa_printf(MSG_DEBUG, "TLS: additional certificate"
2212 " from PKCS12: subject='%s'", buf);
2213 /*
2214 * There is no SSL equivalent for the chain cert - so
2215 * always add it to the context...
2216 */
bd9b8b2b
JM		 2217 if (SSL_CTX_add_extra_chain_cert(data->ssl, cert) != 1)
2218 {
6fc6879b
JM		 2219 res = -1;
2220 break;
2221 }
2222 }
2223 sk_X509_free(certs);
de2a7b79 2224#endif /* OPENSSL_VERSION_NUMBER >= 0x10002000L */
6fc6879b
JM		 2225 }
2226
2227 PKCS12_free(p12);
2228
2229 if (res < 0)
bd9b8b2b 2230 tls_get_errors(data);
6fc6879b
JM		 2231
2232 return res;
2233}
2234#endif /* PKCS12_FUNCS */
2235
2236
bd9b8b2b
JM		 2237static int tls_read_pkcs12(struct tls_data *data, SSL *ssl,
2238 const char *private_key, const char *passwd)
6fc6879b
JM		 2239{
2240#ifdef PKCS12_FUNCS
2241 FILE *f;
2242 PKCS12 *p12;
2243
2244 f = fopen(private_key, "rb");
2245 if (f == NULL)
2246 return -1;
2247
2248 p12 = d2i_PKCS12_fp(f, NULL);
2249 fclose(f);
2250
2251 if (p12 == NULL) {
2252 tls_show_errors(MSG_INFO, __func__,
2253 "Failed to use PKCS#12 file");
2254 return -1;
2255 }
2256
bd9b8b2b 2257 return tls_parse_pkcs12(data, ssl, p12, passwd);
6fc6879b
JM		 2258
2259#else /* PKCS12_FUNCS */
2260 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read "
2261 "p12/pfx files");
2262 return -1;
2263#endif /* PKCS12_FUNCS */
2264}
2265
2266
bd9b8b2b 2267static int tls_read_pkcs12_blob(struct tls_data *data, SSL *ssl,
6fc6879b
JM		 2268 const u8 *blob, size_t len, const char *passwd)
2269{
2270#ifdef PKCS12_FUNCS
2271 PKCS12 *p12;
2272
fee31f76 2273 p12 = d2i_PKCS12(NULL, (const unsigned char **) &blob, len);
6fc6879b
JM		 2274 if (p12 == NULL) {
2275 tls_show_errors(MSG_INFO, __func__,
2276 "Failed to use PKCS#12 blob");
2277 return -1;
2278 }
2279
bd9b8b2b 2280 return tls_parse_pkcs12(data, ssl, p12, passwd);
6fc6879b
JM		 2281
2282#else /* PKCS12_FUNCS */
2283 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse "
2284 "p12/pfx blobs");
2285 return -1;
2286#endif /* PKCS12_FUNCS */
2287}
2288
2289
e572cb63 2290#ifndef OPENSSL_NO_ENGINE
e59c91af
DS		 2291static int tls_engine_get_cert(struct tls_connection *conn,
2292 const char *cert_id,
2293 X509 **cert)
2294{
e59c91af
DS		 2295 /* this runs after the private key is loaded so no PIN is required */
2296 struct {
2297 const char *cert_id;
2298 X509 *cert;
2299 } params;
2300 params.cert_id = cert_id;
2301 params.cert = NULL;
2302
2303 if (!ENGINE_ctrl_cmd(conn->engine, "LOAD_CERT_CTRL",
2304 0, &params, NULL, 1)) {
fd4fb281
MG		 2305 unsigned long err = ERR_get_error();
2306
e59c91af
DS		 2307 wpa_printf(MSG_ERROR, "ENGINE: cannot load client cert with id"
2308 " '%s' [%s]", cert_id,
fd4fb281
MG		 2309 ERR_error_string(err, NULL));
2310 if (tls_is_pin_error(err))
2311 return TLS_SET_PARAMS_ENGINE_PRV_BAD_PIN;
e59c91af
DS		 2312 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
2313 }
2314 if (!params.cert) {
2315 wpa_printf(MSG_ERROR, "ENGINE: did not properly cert with id"
2316 " '%s'", cert_id);
2317 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
2318 }
2319 *cert = params.cert;
2320 return 0;
e59c91af 2321}
e572cb63 2322#endif /* OPENSSL_NO_ENGINE */
e59c91af
DS		 2323
2324
2325static int tls_connection_engine_client_cert(struct tls_connection *conn,
2326 const char *cert_id)
2327{
2328#ifndef OPENSSL_NO_ENGINE
2329 X509 *cert;
2330
2331 if (tls_engine_get_cert(conn, cert_id, &cert))
2332 return -1;
2333
2334 if (!SSL_use_certificate(conn->ssl, cert)) {
2335 tls_show_errors(MSG_ERROR, __func__,
2336 "SSL_use_certificate failed");
2337 X509_free(cert);
2338 return -1;
2339 }
2340 X509_free(cert);
2341 wpa_printf(MSG_DEBUG, "ENGINE: SSL_use_certificate --> "
2342 "OK");
2343 return 0;
2344
2345#else /* OPENSSL_NO_ENGINE */
2346 return -1;
2347#endif /* OPENSSL_NO_ENGINE */
2348}
2349
2350
bd9b8b2b 2351static int tls_connection_engine_ca_cert(struct tls_data *data,
e59c91af
DS		 2352 struct tls_connection *conn,
2353 const char *ca_cert_id)
2354{
2355#ifndef OPENSSL_NO_ENGINE
2356 X509 *cert;
bd9b8b2b 2357 SSL_CTX *ssl_ctx = data->ssl;
68ae4773 2358 X509_STORE *store;
e59c91af
DS		 2359
2360 if (tls_engine_get_cert(conn, ca_cert_id, &cert))
2361 return -1;
2362
2363 /* start off the same as tls_connection_ca_cert */
68ae4773
JM		 2364 store = X509_STORE_new();
2365 if (store == NULL) {
e59c91af
DS		 2366 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
2367 "certificate store", __func__);
2368 X509_free(cert);
2369 return -1;
2370 }
68ae4773
JM		 2371 SSL_CTX_set_cert_store(ssl_ctx, store);
2372 if (!X509_STORE_add_cert(store, cert)) {
e59c91af
DS		 2373 unsigned long err = ERR_peek_error();
2374 tls_show_errors(MSG_WARNING, __func__,
2375 "Failed to add CA certificate from engine "
2376 "to certificate store");
2377 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
2378 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
2379 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring cert"
2380 " already in hash table error",
2381 __func__);
2382 } else {
2383 X509_free(cert);
2384 return -1;
2385 }
2386 }
2387 X509_free(cert);
2388 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added CA certificate from engine "
2389 "to certificate store", __func__);
2390 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
d8858cad
CW		 2391 conn->ca_cert_verify = 1;
2392
e59c91af
DS		 2393 return 0;
2394
2395#else /* OPENSSL_NO_ENGINE */
2396 return -1;
2397#endif /* OPENSSL_NO_ENGINE */
2398}
2399
2400
6fc6879b
JM		 2401static int tls_connection_engine_private_key(struct tls_connection *conn)
2402{
2403#ifndef OPENSSL_NO_ENGINE
2404 if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) {
2405 tls_show_errors(MSG_ERROR, __func__,
2406 "ENGINE: cannot use private key for TLS");
2407 return -1;
2408 }
2409 if (!SSL_check_private_key(conn->ssl)) {
2410 tls_show_errors(MSG_INFO, __func__,
2411 "Private key failed verification");
2412 return -1;
2413 }
2414 return 0;
2415#else /* OPENSSL_NO_ENGINE */
2416 wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but "
2417 "engine support was not compiled in");
2418 return -1;
2419#endif /* OPENSSL_NO_ENGINE */
2420}
2421
2422
bd9b8b2b 2423static int tls_connection_private_key(struct tls_data *data,
6fc6879b
JM		 2424 struct tls_connection *conn,
2425 const char *private_key,
2426 const char *private_key_passwd,
2427 const u8 *private_key_blob,
2428 size_t private_key_blob_len)
2429{
bd9b8b2b 2430 SSL_CTX *ssl_ctx = data->ssl;
6fc6879b
JM		 2431 char *passwd;
2432 int ok;
2433
2434 if (private_key == NULL && private_key_blob == NULL)
2435 return 0;
2436
2437 if (private_key_passwd) {
2438 passwd = os_strdup(private_key_passwd);
2439 if (passwd == NULL)
2440 return -1;
2441 } else
2442 passwd = NULL;
2443
2444 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
2445 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
2446
2447 ok = 0;
2448 while (private_key_blob) {
2449 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl,
2450 (u8 *) private_key_blob,
2451 private_key_blob_len) == 1) {
2452 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
2453 "ASN1(EVP_PKEY_RSA) --> OK");
2454 ok = 1;
2455 break;
6fc6879b
JM		 2456 }
2457
2458 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl,
2459 (u8 *) private_key_blob,
2460 private_key_blob_len) == 1) {
2461 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
2462 "ASN1(EVP_PKEY_DSA) --> OK");
2463 ok = 1;
2464 break;
6fc6879b
JM		 2465 }
2466
2467 if (SSL_use_RSAPrivateKey_ASN1(conn->ssl,
2468 (u8 *) private_key_blob,
2469 private_key_blob_len) == 1) {
2470 wpa_printf(MSG_DEBUG, "OpenSSL: "
2471 "SSL_use_RSAPrivateKey_ASN1 --> OK");
2472 ok = 1;
2473 break;
6fc6879b
JM		 2474 }
2475
bd9b8b2b 2476 if (tls_read_pkcs12_blob(data, conn->ssl, private_key_blob,
6fc6879b
JM		 2477 private_key_blob_len, passwd) == 0) {
2478 wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> "
2479 "OK");
2480 ok = 1;
2481 break;
2482 }
2483
2484 break;
2485 }
2486
2487 while (!ok && private_key) {
2488#ifndef OPENSSL_NO_STDIO
2489 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
2490 SSL_FILETYPE_ASN1) == 1) {
2491 wpa_printf(MSG_DEBUG, "OpenSSL: "
2492 "SSL_use_PrivateKey_File (DER) --> OK");
2493 ok = 1;
2494 break;
6fc6879b
JM		 2495 }
2496
2497 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
2498 SSL_FILETYPE_PEM) == 1) {
2499 wpa_printf(MSG_DEBUG, "OpenSSL: "
2500 "SSL_use_PrivateKey_File (PEM) --> OK");
2501 ok = 1;
2502 break;
6fc6879b
JM		 2503 }
2504#else /* OPENSSL_NO_STDIO */
2505 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
2506 __func__);
2507#endif /* OPENSSL_NO_STDIO */
2508
bd9b8b2b 2509 if (tls_read_pkcs12(data, conn->ssl, private_key, passwd)
6fc6879b
JM		 2510 == 0) {
2511 wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file "
2512 "--> OK");
2513 ok = 1;
2514 break;
2515 }
2516
2517 if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) {
2518 wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to "
2519 "access certificate store --> OK");
2520 ok = 1;
2521 break;
2522 }
2523
2524 break;
2525 }
2526
2527 if (!ok) {
effab86f
JM		 2528 tls_show_errors(MSG_INFO, __func__,
2529 "Failed to load private key");
6fc6879b 2530 os_free(passwd);
6fc6879b
JM		 2531 return -1;
2532 }
2533 ERR_clear_error();
2534 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
2535 os_free(passwd);
55651a4b 2536
6fc6879b
JM		 2537 if (!SSL_check_private_key(conn->ssl)) {
2538 tls_show_errors(MSG_INFO, __func__, "Private key failed "
2539 "verification");
2540 return -1;
2541 }
2542
2543 wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully");
2544 return 0;
2545}
2546
2547
bd9b8b2b
JM		 2548static int tls_global_private_key(struct tls_data *data,
2549 const char *private_key,
6fc6879b
JM		 2550 const char *private_key_passwd)
2551{
bd9b8b2b 2552 SSL_CTX *ssl_ctx = data->ssl;
6fc6879b
JM		 2553 char *passwd;
2554
2555 if (private_key == NULL)
2556 return 0;
2557
2558 if (private_key_passwd) {
2559 passwd = os_strdup(private_key_passwd);
2560 if (passwd == NULL)
2561 return -1;
2562 } else
2563 passwd = NULL;
2564
2565 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
2566 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
2567 if (
2568#ifndef OPENSSL_NO_STDIO
2569 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
2570 SSL_FILETYPE_ASN1) != 1 &&
2571 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
2572 SSL_FILETYPE_PEM) != 1 &&
2573#endif /* OPENSSL_NO_STDIO */
bd9b8b2b 2574 tls_read_pkcs12(data, NULL, private_key, passwd)) {
6fc6879b
JM		 2575 tls_show_errors(MSG_INFO, __func__,
2576 "Failed to load private key");
2577 os_free(passwd);
2578 ERR_clear_error();
2579 return -1;
2580 }
2581 os_free(passwd);
2582 ERR_clear_error();
2583 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
55651a4b 2584
6fc6879b
JM		 2585 if (!SSL_CTX_check_private_key(ssl_ctx)) {
2586 tls_show_errors(MSG_INFO, __func__,
2587 "Private key failed verification");
2588 return -1;
2589 }
2590
2591 return 0;
2592}
2593
2594
2595static int tls_connection_dh(struct tls_connection *conn, const char *dh_file)
2596{
2597#ifdef OPENSSL_NO_DH
2598 if (dh_file == NULL)
2599 return 0;
2600 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
2601 "dh_file specified");
2602 return -1;
2603#else /* OPENSSL_NO_DH */
2604 DH *dh;
2605 BIO *bio;
2606
2607 /* TODO: add support for dh_blob */
2608 if (dh_file == NULL)
2609 return 0;
2610 if (conn == NULL)
2611 return -1;
2612
2613 bio = BIO_new_file(dh_file, "r");
2614 if (bio == NULL) {
2615 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
2616 dh_file, ERR_error_string(ERR_get_error(), NULL));
2617 return -1;
2618 }
2619 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
2620 BIO_free(bio);
2621#ifndef OPENSSL_NO_DSA
2622 while (dh == NULL) {
2623 DSA *dsa;
2624 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
2625 " trying to parse as DSA params", dh_file,
2626 ERR_error_string(ERR_get_error(), NULL));
2627 bio = BIO_new_file(dh_file, "r");
2628 if (bio == NULL)
2629 break;
2630 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
2631 BIO_free(bio);
2632 if (!dsa) {
2633 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
2634 "'%s': %s", dh_file,
2635 ERR_error_string(ERR_get_error(), NULL));
2636 break;
2637 }
2638
2639 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
2640 dh = DSA_dup_DH(dsa);
2641 DSA_free(dsa);
2642 if (dh == NULL) {
2643 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
2644 "params into DH params");
2645 break;
2646 }
2647 break;
2648 }
2649#endif /* !OPENSSL_NO_DSA */
2650 if (dh == NULL) {
2651 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
2652 "'%s'", dh_file);
2653 return -1;
2654 }
2655
2656 if (SSL_set_tmp_dh(conn->ssl, dh) != 1) {
2657 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
2658 "%s", dh_file,
2659 ERR_error_string(ERR_get_error(), NULL));
2660 DH_free(dh);
2661 return -1;
2662 }
2663 DH_free(dh);
2664 return 0;
2665#endif /* OPENSSL_NO_DH */
2666}
2667
2668
bd9b8b2b 2669static int tls_global_dh(struct tls_data *data, const char *dh_file)
6fc6879b
JM		 2670{
2671#ifdef OPENSSL_NO_DH
2672 if (dh_file == NULL)
2673 return 0;
2674 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
2675 "dh_file specified");
2676 return -1;
2677#else /* OPENSSL_NO_DH */
bd9b8b2b 2678 SSL_CTX *ssl_ctx = data->ssl;
6fc6879b
JM		 2679 DH *dh;
2680 BIO *bio;
2681
2682 /* TODO: add support for dh_blob */
2683 if (dh_file == NULL)
2684 return 0;
2685 if (ssl_ctx == NULL)
2686 return -1;
2687
2688 bio = BIO_new_file(dh_file, "r");
2689 if (bio == NULL) {
2690 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
2691 dh_file, ERR_error_string(ERR_get_error(), NULL));
2692 return -1;
2693 }
2694 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
2695 BIO_free(bio);
2696#ifndef OPENSSL_NO_DSA
2697 while (dh == NULL) {
2698 DSA *dsa;
2699 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
2700 " trying to parse as DSA params", dh_file,
2701 ERR_error_string(ERR_get_error(), NULL));
2702 bio = BIO_new_file(dh_file, "r");
2703 if (bio == NULL)
2704 break;
2705 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
2706 BIO_free(bio);
2707 if (!dsa) {
2708 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
2709 "'%s': %s", dh_file,
2710 ERR_error_string(ERR_get_error(), NULL));
2711 break;
2712 }
2713
2714 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
2715 dh = DSA_dup_DH(dsa);
2716 DSA_free(dsa);
2717 if (dh == NULL) {
2718 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
2719 "params into DH params");
2720 break;
2721 }
2722 break;
2723 }
2724#endif /* !OPENSSL_NO_DSA */
2725 if (dh == NULL) {
2726 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
2727 "'%s'", dh_file);
2728 return -1;
2729 }
2730
2731 if (SSL_CTX_set_tmp_dh(ssl_ctx, dh) != 1) {
2732 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
2733 "%s", dh_file,
2734 ERR_error_string(ERR_get_error(), NULL));
2735 DH_free(dh);
2736 return -1;
2737 }
2738 DH_free(dh);
2739 return 0;
2740#endif /* OPENSSL_NO_DH */
2741}
2742
2743
1046db8b
JM		 2744int tls_connection_get_random(void *ssl_ctx, struct tls_connection *conn,
2745 struct tls_random *keys)
6fc6879b
JM		 2746{
2747 SSL *ssl;
2748
2749 if (conn == NULL || keys == NULL)
2750 return -1;
2751 ssl = conn->ssl;
005c5dcf 2752#if OPENSSL_VERSION_NUMBER < 0x10100000L
6fc6879b
JM		 2753 if (ssl == NULL || ssl->s3 == NULL || ssl->session == NULL)
2754 return -1;
2755
2756 os_memset(keys, 0, sizeof(*keys));
6fc6879b
JM		 2757 keys->client_random = ssl->s3->client_random;
2758 keys->client_random_len = SSL3_RANDOM_SIZE;
2759 keys->server_random = ssl->s3->server_random;
2760 keys->server_random_len = SSL3_RANDOM_SIZE;
005c5dcf
JM		 2761#else
2762 if (ssl == NULL)
2763 return -1;
2764
2765 os_memset(keys, 0, sizeof(*keys));
2766 keys->client_random = conn->client_random;
2767 keys->client_random_len = SSL_get_client_random(
2768 ssl, conn->client_random, sizeof(conn->client_random));
2769 keys->server_random = conn->server_random;
2770 keys->server_random_len = SSL_get_server_random(
2771 ssl, conn->server_random, sizeof(conn->server_random));
2772#endif
6fc6879b
JM		 2773
2774 return 0;
2775}
2776
2777
266cf4a0 2778#ifndef CONFIG_FIPS
af851914
JM		 2779static int openssl_get_keyblock_size(SSL *ssl)
2780{
3de28506 2781#if OPENSSL_VERSION_NUMBER < 0x10100000L
af851914
JM		 2782 const EVP_CIPHER *c;
2783 const EVP_MD *h;
2784 int md_size;
2785
2786 if (ssl->enc_read_ctx == NULL || ssl->enc_read_ctx->cipher == NULL ||
2787 ssl->read_hash == NULL)
2788 return -1;
2789
2790 c = ssl->enc_read_ctx->cipher;
2791#if OPENSSL_VERSION_NUMBER >= 0x00909000L
2792 h = EVP_MD_CTX_md(ssl->read_hash);
2793#else
92f190a0 2794 h = ssl->read_hash;
af851914
JM		 2795#endif
2796 if (h)
2797 md_size = EVP_MD_size(h);
2798#if OPENSSL_VERSION_NUMBER >= 0x10000000L
2799 else if (ssl->s3)
2800 md_size = ssl->s3->tmp.new_mac_secret_size;
2801#endif
2802 else
2803 return -1;
2804
2805 wpa_printf(MSG_DEBUG, "OpenSSL: keyblock size: key_len=%d MD_size=%d "
2806 "IV_len=%d", EVP_CIPHER_key_length(c), md_size,
2807 EVP_CIPHER_iv_length(c));
2808 return 2 * (EVP_CIPHER_key_length(c) +
2809 md_size +
2810 EVP_CIPHER_iv_length(c));
3de28506
JM		 2811#else
2812 const SSL_CIPHER *ssl_cipher;
2813 int cipher, digest;
2814 const EVP_CIPHER *c;
2815 const EVP_MD *h;
2816
2817 ssl_cipher = SSL_get_current_cipher(ssl);
2818 if (!ssl_cipher)
2819 return -1;
2820 cipher = SSL_CIPHER_get_cipher_nid(ssl_cipher);
2821 digest = SSL_CIPHER_get_digest_nid(ssl_cipher);
2822 wpa_printf(MSG_DEBUG, "OpenSSL: cipher nid %d digest nid %d",
2823 cipher, digest);
2824 if (cipher < 0 || digest < 0)
2825 return -1;
2826 c = EVP_get_cipherbynid(cipher);
2827 h = EVP_get_digestbynid(digest);
2828 if (!c || !h)
2829 return -1;
2830
2831 wpa_printf(MSG_DEBUG,
2832 "OpenSSL: keyblock size: key_len=%d MD_size=%d IV_len=%d",
2833 EVP_CIPHER_key_length(c), EVP_MD_size(h),
2834 EVP_CIPHER_iv_length(c));
2835 return 2 * (EVP_CIPHER_key_length(c) + EVP_MD_size(h) +
2836 EVP_CIPHER_iv_length(c));
2837#endif
af851914 2838}
266cf4a0 2839#endif /* CONFIG_FIPS */
af851914
JM		 2840
2841
bd9b8b2b 2842static int openssl_tls_prf(struct tls_connection *conn,
fa0e7151 2843 const char *label, int server_random_first,
af851914 2844 int skip_keyblock, u8 *out, size_t out_len)
fa0e7151
JM		 2845{
2846#ifdef CONFIG_FIPS
2847 wpa_printf(MSG_ERROR, "OpenSSL: TLS keys cannot be exported in FIPS "
2848 "mode");
2849 return -1;
2850#else /* CONFIG_FIPS */
3de28506 2851#if OPENSSL_VERSION_NUMBER < 0x10100000L
fa0e7151
JM		 2852 SSL *ssl;
2853 u8 *rnd;
2854 int ret = -1;
af851914
JM		 2855 int skip = 0;
2856 u8 *tmp_out = NULL;
2857 u8 *_out = out;
16bc3b89 2858 const char *ver;
fa0e7151
JM		 2859
2860 /*
2861 * TLS library did not support key generation, so get the needed TLS
2862 * session parameters and use an internal implementation of TLS PRF to
2863 * derive the key.
2864 */
2865
2866 if (conn == NULL)
2867 return -1;
2868 ssl = conn->ssl;
2869 if (ssl == NULL || ssl->s3 == NULL || ssl->session == NULL ||
cb71a834 2870 ssl->session->master_key_length <= 0)
fa0e7151 2871 return -1;
16bc3b89 2872 ver = SSL_get_version(ssl);
fa0e7151 2873
af851914
JM		 2874 if (skip_keyblock) {
2875 skip = openssl_get_keyblock_size(ssl);
2876 if (skip < 0)
2877 return -1;
2878 tmp_out = os_malloc(skip + out_len);
2879 if (!tmp_out)
2880 return -1;
2881 _out = tmp_out;
2882 }
2883
fa0e7151 2884 rnd = os_malloc(2 * SSL3_RANDOM_SIZE);
144b6a06
BR		 2885 if (!rnd) {
2886 os_free(tmp_out);
fa0e7151 2887 return -1;
144b6a06
BR		 2888 }
2889
fa0e7151
JM		 2890 if (server_random_first) {
2891 os_memcpy(rnd, ssl->s3->server_random, SSL3_RANDOM_SIZE);
2892 os_memcpy(rnd + SSL3_RANDOM_SIZE, ssl->s3->client_random,
2893 SSL3_RANDOM_SIZE);
2894 } else {
2895 os_memcpy(rnd, ssl->s3->client_random, SSL3_RANDOM_SIZE);
2896 os_memcpy(rnd + SSL3_RANDOM_SIZE, ssl->s3->server_random,
2897 SSL3_RANDOM_SIZE);
2898 }
2899
16bc3b89
JM		 2900 if (os_strcmp(ver, "TLSv1.2") == 0) {
2901 tls_prf_sha256(ssl->session->master_key,
2902 ssl->session->master_key_length,
2903 label, rnd, 2 * SSL3_RANDOM_SIZE,
2904 _out, skip + out_len);
fa0e7151 2905 ret = 0;
16bc3b89
JM		 2906 } else if (tls_prf_sha1_md5(ssl->session->master_key,
2907 ssl->session->master_key_length,
2908 label, rnd, 2 * SSL3_RANDOM_SIZE,
2909 _out, skip + out_len) == 0) {
2910 ret = 0;
2911 }
fa0e7151 2912 os_free(rnd);
af851914
JM		 2913 if (ret == 0 && skip_keyblock)
2914 os_memcpy(out, _out + skip, out_len);
2915 bin_clear_free(tmp_out, skip);
fa0e7151
JM		 2916
2917 return ret;
3de28506
JM		 2918#else
2919 SSL *ssl;
2920 SSL_SESSION *sess;
2921 u8 *rnd;
2922 int ret = -1;
2923 int skip = 0;
2924 u8 *tmp_out = NULL;
2925 u8 *_out = out;
2926 unsigned char client_random[SSL3_RANDOM_SIZE];
2927 unsigned char server_random[SSL3_RANDOM_SIZE];
2928 unsigned char master_key[64];
2929 size_t master_key_len;
16bc3b89 2930 const char *ver;
3de28506
JM		 2931
2932 /*
2933 * TLS library did not support key generation, so get the needed TLS
2934 * session parameters and use an internal implementation of TLS PRF to
2935 * derive the key.
2936 */
2937
2938 if (conn == NULL)
2939 return -1;
2940 ssl = conn->ssl;
2941 if (ssl == NULL)
2942 return -1;
16bc3b89 2943 ver = SSL_get_version(ssl);
3de28506 2944 sess = SSL_get_session(ssl);
16bc3b89 2945 if (!ver || !sess)
3de28506
JM		 2946 return -1;
2947
2948 if (skip_keyblock) {
2949 skip = openssl_get_keyblock_size(ssl);
2950 if (skip < 0)
2951 return -1;
2952 tmp_out = os_malloc(skip + out_len);
2953 if (!tmp_out)
2954 return -1;
2955 _out = tmp_out;
2956 }
2957
2958 rnd = os_malloc(2 * SSL3_RANDOM_SIZE);
2959 if (!rnd) {
2960 os_free(tmp_out);
2961 return -1;
2962 }
2963
2964 SSL_get_client_random(ssl, client_random, sizeof(client_random));
2965 SSL_get_server_random(ssl, server_random, sizeof(server_random));
2966 master_key_len = SSL_SESSION_get_master_key(sess, master_key,
2967 sizeof(master_key));
2968
2969 if (server_random_first) {
2970 os_memcpy(rnd, server_random, SSL3_RANDOM_SIZE);
2971 os_memcpy(rnd + SSL3_RANDOM_SIZE, client_random,
2972 SSL3_RANDOM_SIZE);
2973 } else {
2974 os_memcpy(rnd, client_random, SSL3_RANDOM_SIZE);
2975 os_memcpy(rnd + SSL3_RANDOM_SIZE, server_random,
2976 SSL3_RANDOM_SIZE);
2977 }
2978
16bc3b89
JM		 2979 if (os_strcmp(ver, "TLSv1.2") == 0) {
2980 tls_prf_sha256(master_key, master_key_len,
2981 label, rnd, 2 * SSL3_RANDOM_SIZE,
2982 _out, skip + out_len);
3de28506 2983 ret = 0;
16bc3b89
JM		 2984 } else if (tls_prf_sha1_md5(master_key, master_key_len,
2985 label, rnd, 2 * SSL3_RANDOM_SIZE,
2986 _out, skip + out_len) == 0) {
2987 ret = 0;
2988 }
3de28506
JM		 2989 os_memset(master_key, 0, sizeof(master_key));
2990 os_free(rnd);
2991 if (ret == 0 && skip_keyblock)
2992 os_memcpy(out, _out + skip, out_len);
2993 bin_clear_free(tmp_out, skip);
2994
2995 return ret;
2996#endif
fa0e7151
JM		 2997#endif /* CONFIG_FIPS */
2998}
2999
3000
6fc6879b
JM		 3001int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
3002 const char *label, int server_random_first,
af851914 3003 int skip_keyblock, u8 *out, size_t out_len)
6fc6879b 3004{
68770ccd
JM		 3005#if OPENSSL_VERSION_NUMBER >= 0x10001000L
3006 SSL *ssl;
3007 if (conn == NULL)
3008 return -1;
af851914 3009 if (server_random_first || skip_keyblock)
bd9b8b2b 3010 return openssl_tls_prf(conn, label,
af851914
JM		 3011 server_random_first, skip_keyblock,
3012 out, out_len);
68770ccd
JM		 3013 ssl = conn->ssl;
3014 if (SSL_export_keying_material(ssl, out, out_len, label,
3015 os_strlen(label), NULL, 0, 0) == 1) {
3016 wpa_printf(MSG_DEBUG, "OpenSSL: Using internal PRF");
3017 return 0;
3018 }
3019#endif
bd9b8b2b 3020 return openssl_tls_prf(conn, label, server_random_first,
af851914 3021 skip_keyblock, out, out_len);
6fc6879b
JM		 3022}
3023
3024
81c85c06
JM		 3025static struct wpabuf *
3026openssl_handshake(struct tls_connection *conn, const struct wpabuf *in_data,
3027 int server)
6fc6879b
JM		 3028{
3029 int res;
81c85c06 3030 struct wpabuf *out_data;
6fc6879b
JM		 3031
3032 /*
3033 * Give TLS handshake data from the server (if available) to OpenSSL
3034 * for processing.
3035 */
e9690eb7 3036 if (in_data && wpabuf_len(in_data) > 0 &&
81c85c06
JM		 3037 BIO_write(conn->ssl_in, wpabuf_head(in_data), wpabuf_len(in_data))
3038 < 0) {
6fc6879b
JM		 3039 tls_show_errors(MSG_INFO, __func__,
3040 "Handshake failed - BIO_write");
3041 return NULL;
3042 }
3043
3044 /* Initiate TLS handshake or continue the existing handshake */
81c85c06
JM		 3045 if (server)
3046 res = SSL_accept(conn->ssl);
3047 else
3048 res = SSL_connect(conn->ssl);
6fc6879b
JM		 3049 if (res != 1) {
3050 int err = SSL_get_error(conn->ssl, res);
3051 if (err == SSL_ERROR_WANT_READ)
3052 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want "
3053 "more data");
3054 else if (err == SSL_ERROR_WANT_WRITE)
3055 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to "
3056 "write");
3057 else {
3058 tls_show_errors(MSG_INFO, __func__, "SSL_connect");
3059 conn->failed++;
3060 }
3061 }
3062
3063 /* Get the TLS handshake data to be sent to the server */
3064 res = BIO_ctrl_pending(conn->ssl_out);
3065 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
81c85c06 3066 out_data = wpabuf_alloc(res);
6fc6879b
JM		 3067 if (out_data == NULL) {
3068 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
3069 "handshake output (%d bytes)", res);
3070 if (BIO_reset(conn->ssl_out) < 0) {
3071 tls_show_errors(MSG_INFO, __func__,
3072 "BIO_reset failed");
3073 }
6fc6879b
JM		 3074 return NULL;
3075 }
81c85c06
JM		 3076 res = res == 0 ? 0 : BIO_read(conn->ssl_out, wpabuf_mhead(out_data),
3077 res);
6fc6879b
JM		 3078 if (res < 0) {
3079 tls_show_errors(MSG_INFO, __func__,
3080 "Handshake failed - BIO_read");
3081 if (BIO_reset(conn->ssl_out) < 0) {
3082 tls_show_errors(MSG_INFO, __func__,
3083 "BIO_reset failed");
3084 }
81c85c06 3085 wpabuf_free(out_data);
6fc6879b
JM		 3086 return NULL;
3087 }
81c85c06 3088 wpabuf_put(out_data, res);
6fc6879b
JM		 3089
3090 return out_data;
3091}
3092
3093
81c85c06
JM		 3094static struct wpabuf *
3095openssl_get_appl_data(struct tls_connection *conn, size_t max_len)
6fc6879b 3096{
81c85c06 3097 struct wpabuf *appl_data;
6fc6879b 3098 int res;
6fc6879b 3099
81c85c06
JM		 3100 appl_data = wpabuf_alloc(max_len + 100);
3101 if (appl_data == NULL)
6fc6879b 3102 return NULL;
6fc6879b 3103
81c85c06
JM		 3104 res = SSL_read(conn->ssl, wpabuf_mhead(appl_data),
3105 wpabuf_size(appl_data));
3106 if (res < 0) {
bf206cad 3107 int err = SSL_get_error(conn->ssl, res);
81c85c06
JM		 3108 if (err == SSL_ERROR_WANT_READ ||
3109 err == SSL_ERROR_WANT_WRITE) {
3110 wpa_printf(MSG_DEBUG, "SSL: No Application Data "
3111 "included");
3112 } else {
6fc6879b 3113 tls_show_errors(MSG_INFO, __func__,
81c85c06
JM		 3114 "Failed to read possible "
3115 "Application Data");
6fc6879b 3116 }
81c85c06 3117 wpabuf_free(appl_data);
6fc6879b
JM		 3118 return NULL;
3119 }
81c85c06
JM		 3120
3121 wpabuf_put(appl_data, res);
3122 wpa_hexdump_buf_key(MSG_MSGDUMP, "SSL: Application Data in Finished "
3123 "message", appl_data);
3124
3125 return appl_data;
3126}
3127
3128
3129static struct wpabuf *
3130openssl_connection_handshake(struct tls_connection *conn,
3131 const struct wpabuf *in_data,
3132 struct wpabuf **appl_data, int server)
3133{
3134 struct wpabuf *out_data;
3135
3136 if (appl_data)
3137 *appl_data = NULL;
3138
3139 out_data = openssl_handshake(conn, in_data, server);
3140 if (out_data == NULL)
6fc6879b 3141 return NULL;
bb52293e
JM		 3142 if (conn->invalid_hb_used) {
3143 wpa_printf(MSG_INFO, "TLS: Heartbeat attack detected - do not send response");
3144 wpabuf_free(out_data);
3145 return NULL;
3146 }
81c85c06 3147
a89beee5
JM		 3148 if (SSL_is_init_finished(conn->ssl)) {
3149 wpa_printf(MSG_DEBUG,
3150 "OpenSSL: Handshake finished - resumed=%d",
3151 tls_connection_resumed(conn->ssl_ctx, conn));
3152 if (appl_data && in_data)
3153 *appl_data = openssl_get_appl_data(conn,
3154 wpabuf_len(in_data));
3155 }
81c85c06 3156
bb52293e
JM		 3157 if (conn->invalid_hb_used) {
3158 wpa_printf(MSG_INFO, "TLS: Heartbeat attack detected - do not send response");
3159 if (appl_data) {
3160 wpabuf_free(*appl_data);
3161 *appl_data = NULL;
3162 }
3163 wpabuf_free(out_data);
3164 return NULL;
3165 }
3166
6fc6879b
JM		 3167 return out_data;
3168}
3169
3170
81c85c06
JM		 3171struct wpabuf *
3172tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn,
3173 const struct wpabuf *in_data,
3174 struct wpabuf **appl_data)
3175{
3176 return openssl_connection_handshake(conn, in_data, appl_data, 0);
3177}
3178
3179
3180struct wpabuf * tls_connection_server_handshake(void *tls_ctx,
3181 struct tls_connection *conn,
3182 const struct wpabuf *in_data,
3183 struct wpabuf **appl_data)
3184{
3185 return openssl_connection_handshake(conn, in_data, appl_data, 1);
3186}
3187
3188
3189struct wpabuf * tls_connection_encrypt(void *tls_ctx,
3190 struct tls_connection *conn,
3191 const struct wpabuf *in_data)
6fc6879b
JM		 3192{
3193 int res;
81c85c06 3194 struct wpabuf *buf;
6fc6879b
JM		 3195
3196 if (conn == NULL)
81c85c06 3197 return NULL;
6fc6879b
JM		 3198
3199 /* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */
3200 if ((res = BIO_reset(conn->ssl_in)) < 0 ||
3201 (res = BIO_reset(conn->ssl_out)) < 0) {
3202 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
81c85c06 3203 return NULL;
6fc6879b 3204 }
81c85c06 3205 res = SSL_write(conn->ssl, wpabuf_head(in_data), wpabuf_len(in_data));
6fc6879b
JM		 3206 if (res < 0) {
3207 tls_show_errors(MSG_INFO, __func__,
3208 "Encryption failed - SSL_write");
81c85c06 3209 return NULL;
6fc6879b
JM		 3210 }
3211
3212 /* Read encrypted data to be sent to the server */
81c85c06
JM		 3213 buf = wpabuf_alloc(wpabuf_len(in_data) + 300);
3214 if (buf == NULL)
3215 return NULL;
3216 res = BIO_read(conn->ssl_out, wpabuf_mhead(buf), wpabuf_size(buf));
6fc6879b
JM		 3217 if (res < 0) {
3218 tls_show_errors(MSG_INFO, __func__,
3219 "Encryption failed - BIO_read");
81c85c06
JM		 3220 wpabuf_free(buf);
3221 return NULL;
6fc6879b 3222 }
81c85c06 3223 wpabuf_put(buf, res);
6fc6879b 3224
81c85c06 3225 return buf;
6fc6879b
JM		 3226}
3227
3228
81c85c06
JM		 3229struct wpabuf * tls_connection_decrypt(void *tls_ctx,
3230 struct tls_connection *conn,
3231 const struct wpabuf *in_data)
6fc6879b
JM		 3232{
3233 int res;
81c85c06 3234 struct wpabuf *buf;
6fc6879b
JM		 3235
3236 /* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */
81c85c06
JM		 3237 res = BIO_write(conn->ssl_in, wpabuf_head(in_data),
3238 wpabuf_len(in_data));
6fc6879b
JM		 3239 if (res < 0) {
3240 tls_show_errors(MSG_INFO, __func__,
3241 "Decryption failed - BIO_write");
81c85c06 3242 return NULL;
6fc6879b
JM		 3243 }
3244 if (BIO_reset(conn->ssl_out) < 0) {
3245 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
81c85c06 3246 return NULL;
6fc6879b
JM		 3247 }
3248
3249 /* Read decrypted data for further processing */
81c85c06
JM		 3250 /*
3251 * Even though we try to disable TLS compression, it is possible that
3252 * this cannot be done with all TLS libraries. Add extra buffer space
3253 * to handle the possibility of the decrypted data being longer than
3254 * input data.
3255 */
3256 buf = wpabuf_alloc((wpabuf_len(in_data) + 500) * 3);
3257 if (buf == NULL)
3258 return NULL;
3259 res = SSL_read(conn->ssl, wpabuf_mhead(buf), wpabuf_size(buf));
6fc6879b
JM		 3260 if (res < 0) {
3261 tls_show_errors(MSG_INFO, __func__,
3262 "Decryption failed - SSL_read");
a86a7316 3263 wpabuf_free(buf);
81c85c06 3264 return NULL;
6fc6879b 3265 }
81c85c06 3266 wpabuf_put(buf, res);
6fc6879b 3267
bb52293e
JM		 3268 if (conn->invalid_hb_used) {
3269 wpa_printf(MSG_INFO, "TLS: Heartbeat attack detected - do not send response");
3270 wpabuf_free(buf);
3271 return NULL;
3272 }
3273
81c85c06 3274 return buf;
6fc6879b
JM		 3275}
3276
3277
3278int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn)
3279{
db3168d4
JM		 3280#if OPENSSL_VERSION_NUMBER >= 0x10001000L
3281 return conn ? SSL_cache_hit(conn->ssl) : 0;
3282#else
6fc6879b 3283 return conn ? conn->ssl->hit : 0;
db3168d4 3284#endif
6fc6879b
JM		 3285}
3286
3287
3288int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
3289 u8 *ciphers)
3290{
3291 char buf[100], *pos, *end;
3292 u8 *c;
3293 int ret;
3294
3295 if (conn == NULL || conn->ssl == NULL || ciphers == NULL)
3296 return -1;
3297
3298 buf[0] = '\0';
3299 pos = buf;
3300 end = pos + sizeof(buf);
3301
3302 c = ciphers;
3303 while (*c != TLS_CIPHER_NONE) {
3304 const char *suite;
3305
3306 switch (*c) {
3307 case TLS_CIPHER_RC4_SHA:
3308 suite = "RC4-SHA";
3309 break;
3310 case TLS_CIPHER_AES128_SHA:
3311 suite = "AES128-SHA";
3312 break;
3313 case TLS_CIPHER_RSA_DHE_AES128_SHA:
3314 suite = "DHE-RSA-AES128-SHA";
3315 break;
3316 case TLS_CIPHER_ANON_DH_AES128_SHA:
3317 suite = "ADH-AES128-SHA";
3318 break;
3319 default:
3320 wpa_printf(MSG_DEBUG, "TLS: Unsupported "
3321 "cipher selection: %d", *c);
3322 return -1;
3323 }
3324 ret = os_snprintf(pos, end - pos, ":%s", suite);
d85e1fc8 3325 if (os_snprintf_error(end - pos, ret))
6fc6879b
JM		 3326 break;
3327 pos += ret;
3328
3329 c++;
3330 }
3331
3332 wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1);
3333
c34cd668
JM		 3334#if OPENSSL_VERSION_NUMBER >= 0x10100000L
3335#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
3336 if (os_strstr(buf, ":ADH-")) {
3337 /*
3338 * Need to drop to security level 0 to allow anonymous
3339 * cipher suites for EAP-FAST.
3340 */
3341 SSL_set_security_level(conn->ssl, 0);
3342 } else if (SSL_get_security_level(conn->ssl) == 0) {
3343 /* Force at least security level 1 */
3344 SSL_set_security_level(conn->ssl, 1);
3345 }
3346#endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
3347#endif
3348
6fc6879b
JM		 3349 if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) {
3350 tls_show_errors(MSG_INFO, __func__,
3351 "Cipher suite configuration failed");
3352 return -1;
3353 }
3354
3355 return 0;
3356}
3357
3358
fe1bf329
JM		 3359int tls_get_version(void *ssl_ctx, struct tls_connection *conn,
3360 char *buf, size_t buflen)
3361{
3362 const char *name;
3363 if (conn == NULL || conn->ssl == NULL)
3364 return -1;
3365
3366 name = SSL_get_version(conn->ssl);
3367 if (name == NULL)
3368 return -1;
3369
3370 os_strlcpy(buf, name, buflen);
3371 return 0;
3372}
3373
3374
6fc6879b
JM		 3375int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn,
3376 char *buf, size_t buflen)
3377{
3378 const char *name;
3379 if (conn == NULL || conn->ssl == NULL)
3380 return -1;
3381
3382 name = SSL_get_cipher(conn->ssl);
3383 if (name == NULL)
3384 return -1;
3385
3386 os_strlcpy(buf, name, buflen);
3387 return 0;
3388}
3389
3390
3391int tls_connection_enable_workaround(void *ssl_ctx,
3392 struct tls_connection *conn)
3393{
3394 SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
3395
3396 return 0;
3397}
3398
3399
1e5839e0 3400#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
6fc6879b
JM		 3401/* ClientHello TLS extensions require a patch to openssl, so this function is
3402 * commented out unless explicitly needed for EAP-FAST in order to be able to
3403 * build this file with unmodified openssl. */
3404int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn,
3405 int ext_type, const u8 *data,
3406 size_t data_len)
3407{
0cf03892 3408 if (conn == NULL || conn->ssl == NULL || ext_type != 35)
6fc6879b
JM		 3409 return -1;
3410
0cf03892
JM		 3411 if (SSL_set_session_ticket_ext(conn->ssl, (void *) data,
3412 data_len) != 1)
3413 return -1;
6fc6879b
JM		 3414
3415 return 0;
3416}
1e5839e0 3417#endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
6fc6879b
JM		 3418
3419
3420int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn)
3421{
3422 if (conn == NULL)
3423 return -1;
3424 return conn->failed;
3425}
3426
3427
3428int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn)
3429{
3430 if (conn == NULL)
3431 return -1;
3432 return conn->read_alerts;
3433}
3434
3435
3436int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn)
3437{
3438 if (conn == NULL)
3439 return -1;
3440 return conn->write_alerts;
3441}
3442
3443
080585c0
JM		 3444#ifdef HAVE_OCSP
3445
3446static void ocsp_debug_print_resp(OCSP_RESPONSE *rsp)
3447{
3448#ifndef CONFIG_NO_STDOUT_DEBUG
080585c0
JM		 3449 BIO *out;
3450 size_t rlen;
3451 char *txt;
3452 int res;
3453
3454 if (wpa_debug_level > MSG_DEBUG)
3455 return;
3456
3457 out = BIO_new(BIO_s_mem());
3458 if (!out)
3459 return;
3460
3461 OCSP_RESPONSE_print(out, rsp, 0);
3462 rlen = BIO_ctrl_pending(out);
3463 txt = os_malloc(rlen + 1);
3464 if (!txt) {
3465 BIO_free(out);
3466 return;
3467 }
3468
3469 res = BIO_read(out, txt, rlen);
3470 if (res > 0) {
3471 txt[res] = '\0';
3472 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP Response\n%s", txt);
3473 }
3474 os_free(txt);
3475 BIO_free(out);
3476#endif /* CONFIG_NO_STDOUT_DEBUG */
3477}
3478
3479
4eb3b76b
JM		 3480static void debug_print_cert(X509 *cert, const char *title)
3481{
3482#ifndef CONFIG_NO_STDOUT_DEBUG
3483 BIO *out;
3484 size_t rlen;
3485 char *txt;
3486 int res;
3487
3488 if (wpa_debug_level > MSG_DEBUG)
3489 return;
3490
3491 out = BIO_new(BIO_s_mem());
3492 if (!out)
3493 return;
3494
3495 X509_print(out, cert);
3496 rlen = BIO_ctrl_pending(out);
3497 txt = os_malloc(rlen + 1);
3498 if (!txt) {
3499 BIO_free(out);
3500 return;
3501 }
3502
3503 res = BIO_read(out, txt, rlen);
3504 if (res > 0) {
3505 txt[res] = '\0';
3506 wpa_printf(MSG_DEBUG, "OpenSSL: %s\n%s", title, txt);
3507 }
3508 os_free(txt);
3509
3510 BIO_free(out);
3511#endif /* CONFIG_NO_STDOUT_DEBUG */
3512}
3513
3514
080585c0
JM		 3515static int ocsp_resp_cb(SSL *s, void *arg)
3516{
3517 struct tls_connection *conn = arg;
3518 const unsigned char *p;
3519 int len, status, reason;
3520 OCSP_RESPONSE *rsp;
3521 OCSP_BASICRESP *basic;
3522 OCSP_CERTID *id;
3523 ASN1_GENERALIZEDTIME *produced_at, *this_update, *next_update;
6bf61fb2
JM		 3524 X509_STORE *store;
3525 STACK_OF(X509) *certs = NULL;
080585c0
JM		 3526
3527 len = SSL_get_tlsext_status_ocsp_resp(s, &p);
3528 if (!p) {
3529 wpa_printf(MSG_DEBUG, "OpenSSL: No OCSP response received");
3530 return (conn->flags & TLS_CONN_REQUIRE_OCSP) ? 0 : 1;
3531 }
3532
3533 wpa_hexdump(MSG_DEBUG, "OpenSSL: OCSP response", p, len);
3534
3535 rsp = d2i_OCSP_RESPONSE(NULL, &p, len);
3536 if (!rsp) {
3537 wpa_printf(MSG_INFO, "OpenSSL: Failed to parse OCSP response");
3538 return 0;
3539 }
3540
3541 ocsp_debug_print_resp(rsp);
3542
3543 status = OCSP_response_status(rsp);
3544 if (status != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
3545 wpa_printf(MSG_INFO, "OpenSSL: OCSP responder error %d (%s)",
3546 status, OCSP_response_status_str(status));
3547 return 0;
3548 }
3549
3550 basic = OCSP_response_get1_basic(rsp);
3551 if (!basic) {
3552 wpa_printf(MSG_INFO, "OpenSSL: Could not find BasicOCSPResponse");
3553 return 0;
3554 }
3555
68ae4773 3556 store = SSL_CTX_get_cert_store(conn->ssl_ctx);
6bf61fb2 3557 if (conn->peer_issuer) {
4eb3b76b 3558 debug_print_cert(conn->peer_issuer, "Add OCSP issuer");
6bf61fb2
JM		 3559
3560 if (X509_STORE_add_cert(store, conn->peer_issuer) != 1) {
3561 tls_show_errors(MSG_INFO, __func__,
58d405fc 3562 "OpenSSL: Could not add issuer to certificate store");
6bf61fb2
JM		 3563 }
3564 certs = sk_X509_new_null();
3565 if (certs) {
3566 X509 *cert;
3567 cert = X509_dup(conn->peer_issuer);
3568 if (cert && !sk_X509_push(certs, cert)) {
3569 tls_show_errors(
3570 MSG_INFO, __func__,
58d405fc 3571 "OpenSSL: Could not add issuer to OCSP responder trust store");
6bf61fb2
JM		 3572 X509_free(cert);
3573 sk_X509_free(certs);
3574 certs = NULL;
3575 }
710dfb4e 3576 if (certs && conn->peer_issuer_issuer) {
6bf61fb2
JM		 3577 cert = X509_dup(conn->peer_issuer_issuer);
3578 if (cert && !sk_X509_push(certs, cert)) {
3579 tls_show_errors(
3580 MSG_INFO, __func__,
58d405fc 3581 "OpenSSL: Could not add issuer's issuer to OCSP responder trust store");
6bf61fb2
JM		 3582 X509_free(cert);
3583 }
3584 }
3585 }
3586 }
3587
3588 status = OCSP_basic_verify(basic, certs, store, OCSP_TRUSTOTHER);
3589 sk_X509_pop_free(certs, X509_free);
080585c0
JM		 3590 if (status <= 0) {
3591 tls_show_errors(MSG_INFO, __func__,
3592 "OpenSSL: OCSP response failed verification");
3593 OCSP_BASICRESP_free(basic);
3594 OCSP_RESPONSE_free(rsp);
3595 return 0;
3596 }
3597
3598 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP response verification succeeded");
3599
762c92a4
JM		 3600 if (!conn->peer_cert) {
3601 wpa_printf(MSG_DEBUG, "OpenSSL: Peer certificate not available for OCSP status check");
3602 OCSP_BASICRESP_free(basic);
3603 OCSP_RESPONSE_free(rsp);
3604 return 0;
3605 }
3606
3607 if (!conn->peer_issuer) {
3608 wpa_printf(MSG_DEBUG, "OpenSSL: Peer issuer certificate not available for OCSP status check");
080585c0
JM		 3609 OCSP_BASICRESP_free(basic);
3610 OCSP_RESPONSE_free(rsp);
3611 return 0;
3612 }
3613
3614 id = OCSP_cert_to_id(NULL, conn->peer_cert, conn->peer_issuer);
3615 if (!id) {
3616 wpa_printf(MSG_DEBUG, "OpenSSL: Could not create OCSP certificate identifier");
3617 OCSP_BASICRESP_free(basic);
3618 OCSP_RESPONSE_free(rsp);
3619 return 0;
3620 }
3621
3622 if (!OCSP_resp_find_status(basic, id, &status, &reason, &produced_at,
3623 &this_update, &next_update)) {
3624 wpa_printf(MSG_INFO, "OpenSSL: Could not find current server certificate from OCSP response%s",
3625 (conn->flags & TLS_CONN_REQUIRE_OCSP) ? "" :
3626 " (OCSP not required)");
3627 OCSP_BASICRESP_free(basic);
3628 OCSP_RESPONSE_free(rsp);
3629 return (conn->flags & TLS_CONN_REQUIRE_OCSP) ? 0 : 1;
3630 }
3631
3632 if (!OCSP_check_validity(this_update, next_update, 5 * 60, -1)) {
3633 tls_show_errors(MSG_INFO, __func__,
3634 "OpenSSL: OCSP status times invalid");
3635 OCSP_BASICRESP_free(basic);
3636 OCSP_RESPONSE_free(rsp);
3637 return 0;
3638 }
3639
3640 OCSP_BASICRESP_free(basic);
3641 OCSP_RESPONSE_free(rsp);
3642
3643 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status for server certificate: %s",
3644 OCSP_cert_status_str(status));
3645
3646 if (status == V_OCSP_CERTSTATUS_GOOD)
3647 return 1;
3648 if (status == V_OCSP_CERTSTATUS_REVOKED)
3649 return 0;
3650 if (conn->flags & TLS_CONN_REQUIRE_OCSP) {
3651 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status unknown, but OCSP required");
3652 return 0;
3653 }
be7963b3 3654 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status unknown, but OCSP was not required, so allow connection to continue");
080585c0
JM		 3655 return 1;
3656}
3657
3658
3659static int ocsp_status_cb(SSL *s, void *arg)
3660{
3661 char *tmp;
3662 char *resp;
3663 size_t len;
3664
3665 if (tls_global->ocsp_stapling_response == NULL) {
3666 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - no response configured");
3667 return SSL_TLSEXT_ERR_OK;
3668 }
3669
3670 resp = os_readfile(tls_global->ocsp_stapling_response, &len);
3671 if (resp == NULL) {
3672 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - could not read response file");
3673 /* TODO: Build OCSPResponse with responseStatus = internalError
3674 */
3675 return SSL_TLSEXT_ERR_OK;
3676 }
3677 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - send cached response");
3678 tmp = OPENSSL_malloc(len);
3679 if (tmp == NULL) {
3680 os_free(resp);
3681 return SSL_TLSEXT_ERR_ALERT_FATAL;
3682 }
3683
3684 os_memcpy(tmp, resp, len);
3685 os_free(resp);
3686 SSL_set_tlsext_status_ocsp_resp(s, tmp, len);
3687
3688 return SSL_TLSEXT_ERR_OK;
3689}
3690
3691#endif /* HAVE_OCSP */
3692
3693
6fc6879b
JM		 3694int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
3695 const struct tls_connection_params *params)
3696{
bd9b8b2b 3697 struct tls_data *data = tls_ctx;
6fc6879b
JM		 3698 int ret;
3699 unsigned long err;
96955192 3700 int can_pkcs11 = 0;
01b0d1d5
DW		 3701 const char *key_id = params->key_id;
3702 const char *cert_id = params->cert_id;
3703 const char *ca_cert_id = params->ca_cert_id;
96955192 3704 const char *engine_id = params->engine ? params->engine_id : NULL;
6fc6879b
JM		 3705
3706 if (conn == NULL)
3707 return -1;
3708
01b0d1d5 3709 /*
96955192
DW		 3710 * If the engine isn't explicitly configured, and any of the
3711 * cert/key fields are actually PKCS#11 URIs, then automatically
3712 * use the PKCS#11 ENGINE.
01b0d1d5 3713 */
96955192
DW		 3714 if (!engine_id || os_strcmp(engine_id, "pkcs11") == 0)
3715 can_pkcs11 = 1;
3716
3717 if (!key_id && params->private_key && can_pkcs11 &&
3718 os_strncmp(params->private_key, "pkcs11:", 7) == 0) {
3719 can_pkcs11 = 2;
01b0d1d5 3720 key_id = params->private_key;
96955192 3721 }
01b0d1d5 3722
96955192
DW		 3723 if (!cert_id && params->client_cert && can_pkcs11 &&
3724 os_strncmp(params->client_cert, "pkcs11:", 7) == 0) {
3725 can_pkcs11 = 2;
01b0d1d5 3726 cert_id = params->client_cert;
96955192 3727 }
01b0d1d5 3728
96955192
DW		 3729 if (!ca_cert_id && params->ca_cert && can_pkcs11 &&
3730 os_strncmp(params->ca_cert, "pkcs11:", 7) == 0) {
3731 can_pkcs11 = 2;
01b0d1d5 3732 ca_cert_id = params->ca_cert;
96955192
DW		 3733 }
3734
3735 /* If we need to automatically enable the PKCS#11 ENGINE, do so. */
3736 if (can_pkcs11 == 2 && !engine_id)
3737 engine_id = "pkcs11";
01b0d1d5 3738
0f56057c 3739#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
06836013 3740#if OPENSSL_VERSION_NUMBER < 0x10100000L
6a31a31d
JM		 3741 if (params->flags & TLS_CONN_EAP_FAST) {
3742 wpa_printf(MSG_DEBUG,
3743 "OpenSSL: Use TLSv1_method() for EAP-FAST");
3744 if (SSL_set_ssl_method(conn->ssl, TLSv1_method()) != 1) {
3745 tls_show_errors(MSG_INFO, __func__,
3746 "Failed to set TLSv1_method() for EAP-FAST");
3747 return -1;
3748 }
3749 }
06836013 3750#endif
0f56057c 3751#endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
d4913c58 3752
6fc6879b
JM		 3753 while ((err = ERR_get_error())) {
3754 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
3755 __func__, ERR_error_string(err, NULL));
3756 }
3757
96955192 3758 if (engine_id) {
e59c91af 3759 wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine");
96955192 3760 ret = tls_engine_init(conn, engine_id, params->pin,
01b0d1d5 3761 key_id, cert_id, ca_cert_id);
e59c91af
DS		 3762 if (ret)
3763 return ret;
3764 }
6fc6879b
JM		 3765 if (tls_connection_set_subject_match(conn,
3766 params->subject_match,
01f809c7 3767 params->altsubject_match,
cebee30f
JM		 3768 params->suffix_match,
3769 params->domain_match))
6fc6879b 3770 return -1;
e59c91af 3771
96955192 3772 if (engine_id && ca_cert_id) {
bd9b8b2b 3773 if (tls_connection_engine_ca_cert(data, conn, ca_cert_id))
e59c91af 3774 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
bd9b8b2b 3775 } else if (tls_connection_ca_cert(data, conn, params->ca_cert,
e59c91af
DS		 3776 params->ca_cert_blob,
3777 params->ca_cert_blob_len,
3778 params->ca_path))
6fc6879b 3779 return -1;
e59c91af 3780
96955192 3781 if (engine_id && cert_id) {
01b0d1d5 3782 if (tls_connection_engine_client_cert(conn, cert_id))
e59c91af
DS		 3783 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
3784 } else if (tls_connection_client_cert(conn, params->client_cert,
3785 params->client_cert_blob,
3786 params->client_cert_blob_len))
6fc6879b
JM		 3787 return -1;
3788
96955192 3789 if (engine_id && key_id) {
e59c91af 3790 wpa_printf(MSG_DEBUG, "TLS: Using private key from engine");
6fc6879b
JM		 3791 if (tls_connection_engine_private_key(conn))
3792 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
bd9b8b2b 3793 } else if (tls_connection_private_key(data, conn,
6fc6879b
JM		 3794 params->private_key,
3795 params->private_key_passwd,
3796 params->private_key_blob,
3797 params->private_key_blob_len)) {
3798 wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'",
3799 params->private_key);
3800 return -1;
3801 }
3802
3803 if (tls_connection_dh(conn, params->dh_file)) {
3804 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
3805 params->dh_file);
3806 return -1;
3807 }
3808
b7328434
JM		 3809 if (params->openssl_ciphers &&
3810 SSL_set_cipher_list(conn->ssl, params->openssl_ciphers) != 1) {
3811 wpa_printf(MSG_INFO,
3812 "OpenSSL: Failed to set cipher string '%s'",
3813 params->openssl_ciphers);
3814 return -1;
3815 }
3816
93bc6549 3817 tls_set_conn_flags(conn->ssl, params->flags);
e9a6f183 3818
080585c0
JM		 3819#ifdef HAVE_OCSP
3820 if (params->flags & TLS_CONN_REQUEST_OCSP) {
bd9b8b2b 3821 SSL_CTX *ssl_ctx = data->ssl;
080585c0
JM		 3822 SSL_set_tlsext_status_type(conn->ssl, TLSEXT_STATUSTYPE_ocsp);
3823 SSL_CTX_set_tlsext_status_cb(ssl_ctx, ocsp_resp_cb);
3824 SSL_CTX_set_tlsext_status_arg(ssl_ctx, conn);
3825 }
355a5c8e
JM		 3826#else /* HAVE_OCSP */
3827 if (params->flags & TLS_CONN_REQUIRE_OCSP) {
3828 wpa_printf(MSG_INFO,
3829 "OpenSSL: No OCSP support included - reject configuration");
3830 return -1;
3831 }
3832 if (params->flags & TLS_CONN_REQUEST_OCSP) {
3833 wpa_printf(MSG_DEBUG,
3834 "OpenSSL: No OCSP support included - allow optional OCSP case to continue");
3835 }
080585c0
JM		 3836#endif /* HAVE_OCSP */
3837
235279e7
JM		 3838 conn->flags = params->flags;
3839
bd9b8b2b 3840 tls_get_errors(data);
6fc6879b
JM		 3841
3842 return 0;
3843}
3844
3845
3846int tls_global_set_params(void *tls_ctx,
3847 const struct tls_connection_params *params)
3848{
bd9b8b2b
JM		 3849 struct tls_data *data = tls_ctx;
3850 SSL_CTX *ssl_ctx = data->ssl;
6fc6879b
JM		 3851 unsigned long err;
3852
3853 while ((err = ERR_get_error())) {
3854 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
3855 __func__, ERR_error_string(err, NULL));
3856 }
3857
bd9b8b2b
JM		 3858 if (tls_global_ca_cert(data, params->ca_cert) ||
3859 tls_global_client_cert(data, params->client_cert) ||
3860 tls_global_private_key(data, params->private_key,
f24b9797 3861 params->private_key_passwd) ||
bd9b8b2b 3862 tls_global_dh(data, params->dh_file)) {
f24b9797 3863 wpa_printf(MSG_INFO, "TLS: Failed to set global parameters");
6fc6879b
JM		 3864 return -1;
3865 }
3866
b7328434
JM		 3867 if (params->openssl_ciphers &&
3868 SSL_CTX_set_cipher_list(ssl_ctx, params->openssl_ciphers) != 1) {
3869 wpa_printf(MSG_INFO,
3870 "OpenSSL: Failed to set cipher string '%s'",
3871 params->openssl_ciphers);
3872 return -1;
3873 }
3874
e866f39f
JM		 3875#ifdef SSL_OP_NO_TICKET
3876 if (params->flags & TLS_CONN_DISABLE_SESSION_TICKET)
3877 SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_TICKET);
d53d2596 3878#ifdef SSL_CTX_clear_options
e866f39f
JM		 3879 else
3880 SSL_CTX_clear_options(ssl_ctx, SSL_OP_NO_TICKET);
d53d2596 3881#endif /* SSL_clear_options */
e866f39f
JM		 3882#endif /* SSL_OP_NO_TICKET */
3883
080585c0
JM		 3884#ifdef HAVE_OCSP
3885 SSL_CTX_set_tlsext_status_cb(ssl_ctx, ocsp_status_cb);
3886 SSL_CTX_set_tlsext_status_arg(ssl_ctx, ssl_ctx);
3887 os_free(tls_global->ocsp_stapling_response);
3888 if (params->ocsp_stapling_response)
3889 tls_global->ocsp_stapling_response =
3890 os_strdup(params->ocsp_stapling_response);
3891 else
3892 tls_global->ocsp_stapling_response = NULL;
3893#endif /* HAVE_OCSP */
3894
6fc6879b
JM		 3895 return 0;
3896}
3897
3898
1e5839e0 3899#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
6fc6879b
JM		 3900/* Pre-shared secred requires a patch to openssl, so this function is
3901 * commented out unless explicitly needed for EAP-FAST in order to be able to
3902 * build this file with unmodified openssl. */
3903
a8572960
AL		 3904#ifdef OPENSSL_IS_BORINGSSL
3905static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
3906 STACK_OF(SSL_CIPHER) *peer_ciphers,
3907 const SSL_CIPHER **cipher, void *arg)
3908#else /* OPENSSL_IS_BORINGSSL */
6fc6879b
JM		 3909static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
3910 STACK_OF(SSL_CIPHER) *peer_ciphers,
3911 SSL_CIPHER **cipher, void *arg)
a8572960 3912#endif /* OPENSSL_IS_BORINGSSL */
6fc6879b
JM		 3913{
3914 struct tls_connection *conn = arg;
3915 int ret;
3916
4d2a1b4f 3917#if OPENSSL_VERSION_NUMBER < 0x10100000L
6fc6879b
JM		 3918 if (conn == NULL || conn->session_ticket_cb == NULL)
3919 return 0;
3920
3921 ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx,
3922 conn->session_ticket,
3923 conn->session_ticket_len,
3924 s->s3->client_random,
3925 s->s3->server_random, secret);
4d2a1b4f
JM		 3926#else
3927 unsigned char client_random[SSL3_RANDOM_SIZE];
3928 unsigned char server_random[SSL3_RANDOM_SIZE];
3929
3930 if (conn == NULL || conn->session_ticket_cb == NULL)
3931 return 0;
3932
3933 SSL_get_client_random(s, client_random, sizeof(client_random));
3934 SSL_get_server_random(s, server_random, sizeof(server_random));
3935
3936 ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx,
3937 conn->session_ticket,
3938 conn->session_ticket_len,
3939 client_random,
3940 server_random, secret);
3941#endif
3942
6fc6879b
JM		 3943 os_free(conn->session_ticket);
3944 conn->session_ticket = NULL;
3945
3946 if (ret <= 0)
3947 return 0;
3948
3949 *secret_len = SSL_MAX_MASTER_KEY_LENGTH;
3950 return 1;
3951}
3952
3953
0cf03892
JM		 3954static int tls_session_ticket_ext_cb(SSL *s, const unsigned char *data,
3955 int len, void *arg)
3956{
3957 struct tls_connection *conn = arg;
3958
3959 if (conn == NULL || conn->session_ticket_cb == NULL)
3960 return 0;
3961
3962 wpa_printf(MSG_DEBUG, "OpenSSL: %s: length=%d", __func__, len);
3963
3964 os_free(conn->session_ticket);
3965 conn->session_ticket = NULL;
3966
3967 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
3968 "extension", data, len);
3969
3970 conn->session_ticket = os_malloc(len);
3971 if (conn->session_ticket == NULL)
3972 return 0;
3973
3974 os_memcpy(conn->session_ticket, data, len);
3975 conn->session_ticket_len = len;
3976
3977 return 1;
3978}
1e5839e0 3979#endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
6fc6879b
JM		 3980
3981
3982int tls_connection_set_session_ticket_cb(void *tls_ctx,
3983 struct tls_connection *conn,
3984 tls_session_ticket_cb cb,
3985 void *ctx)
3986{
1e5839e0 3987#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
6fc6879b
JM		 3988 conn->session_ticket_cb = cb;
3989 conn->session_ticket_cb_ctx = ctx;
3990
3991 if (cb) {
3992 if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb,
3993 conn) != 1)
3994 return -1;
0cf03892
JM		 3995 SSL_set_session_ticket_ext_cb(conn->ssl,
3996 tls_session_ticket_ext_cb, conn);
6fc6879b
JM		 3997 } else {
3998 if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1)
3999 return -1;
0cf03892 4000 SSL_set_session_ticket_ext_cb(conn->ssl, NULL, NULL);
6fc6879b
JM		 4001 }
4002
4003 return 0;
1e5839e0 4004#else /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
6fc6879b 4005 return -1;
1e5839e0 4006#endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
6fc6879b 4007}
a1651451
JM		 4008
4009
4010int tls_get_library_version(char *buf, size_t buf_len)
4011{
4012 return os_snprintf(buf, buf_len, "OpenSSL build=%s run=%s",
4013 OPENSSL_VERSION_TEXT,
4014 SSLeay_version(SSLEAY_VERSION));
4015}
b3b8085a
JM		 4016
4017
4018void tls_connection_set_success_data(struct tls_connection *conn,
4019 struct wpabuf *data)
4020{
4021}
4022
4023
4024void tls_connection_set_success_data_resumed(struct tls_connection *conn)
4025{
4026}
4027
4028
4029const struct wpabuf *
4030tls_connection_get_success_data(struct tls_connection *conn)
4031{
4032 return NULL;
4033}
4034
4035
4036void tls_connection_remove_session(struct tls_connection *conn)
4037{
4038}
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