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