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List.mui: Update entries count prior to range change
[AROS.git] / workbench / network / WirelessManager / src / crypto / tls_openssl.c
blobc0a40f95617c620458e95e3ae4b1d70ce5516877
1 /*
2 * SSL/TLS interface functions for OpenSSL
3 * Copyright (c) 2004-2010, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15 #include "includes.h"
16
17 #ifndef CONFIG_SMARTCARD
18 #ifndef OPENSSL_NO_ENGINE
19 #define OPENSSL_NO_ENGINE
20 #endif
21 #endif
22
23 #include <openssl/ssl.h>
24 #include <openssl/err.h>
25 #include <openssl/pkcs12.h>
26 #include <openssl/x509v3.h>
27 #ifndef OPENSSL_NO_ENGINE
28 #include <openssl/engine.h>
29 #endif /* OPENSSL_NO_ENGINE */
30
31 #include "common.h"
32 #include "crypto.h"
33 #include "tls.h"
34
35 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL
36 #define OPENSSL_d2i_TYPE const unsigned char **
37 #else
38 #define OPENSSL_d2i_TYPE unsigned char **
39 #endif
40
41 #ifdef SSL_F_SSL_SET_SESSION_TICKET_EXT
42 #ifdef SSL_OP_NO_TICKET
43 /*
44 * Session ticket override patch was merged into OpenSSL 0.9.9 tree on
45 * 2008-11-15. This version uses a bit different API compared to the old patch.
46 */
47 #define CONFIG_OPENSSL_TICKET_OVERRIDE
48 #endif
49 #endif
50
51 static int tls_openssl_ref_count = 0;
52
53 struct tls_global {
54 void (*event_cb)(void *ctx, enum tls_event ev,
55 union tls_event_data *data);
56 void *cb_ctx;
57 };
58
59 static struct tls_global *tls_global = NULL;
60
61
62 struct 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;
78
79 unsigned int ca_cert_verify:1;
80 unsigned int cert_probe:1;
81 unsigned int server_cert_only:1;
82
83 u8 srv_cert_hash[32];
84 };
85
86
87 #ifdef CONFIG_NO_STDOUT_DEBUG
88
89 static void _tls_show_errors(void)
90 {
91 unsigned long err;
92
93 while ((err = ERR_get_error())) {
94 /* Just ignore the errors, since stdout is disabled */
95 }
96 }
97 #define tls_show_errors(l, f, t) _tls_show_errors()
98
99 #else /* CONFIG_NO_STDOUT_DEBUG */
100
101 static void tls_show_errors(int level, const char *func, const char *txt)
102 {
103 unsigned long err;
104
105 wpa_printf(level, "OpenSSL: %s - %s %s",
106 func, txt, ERR_error_string(ERR_get_error(), NULL));
107
108 while ((err = ERR_get_error())) {
109 wpa_printf(MSG_INFO, "OpenSSL: pending error: %s",
110 ERR_error_string(err, NULL));
111 }
112 }
113
114 #endif /* CONFIG_NO_STDOUT_DEBUG */
115
116
117 #ifdef CONFIG_NATIVE_WINDOWS
118
119 /* Windows CryptoAPI and access to certificate stores */
120 #include <wincrypt.h>
121
122 #ifdef __MINGW32_VERSION
123 /*
124 * MinGW does not yet include all the needed definitions for CryptoAPI, so
125 * define here whatever extra is needed.
126 */
127 #define CERT_SYSTEM_STORE_CURRENT_USER (1 << 16)
128 #define CERT_STORE_READONLY_FLAG 0x00008000
129 #define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000
130
131 #endif /* __MINGW32_VERSION */
132
133
134 struct cryptoapi_rsa_data {
135 const CERT_CONTEXT *cert;
136 HCRYPTPROV crypt_prov;
137 DWORD key_spec;
138 BOOL free_crypt_prov;
139 };
140
141
142 static void cryptoapi_error(const char *msg)
143 {
144 wpa_printf(MSG_INFO, "CryptoAPI: %s; err=%u",
145 msg, (unsigned int) GetLastError());
146 }
147
148
149 static int cryptoapi_rsa_pub_enc(int flen, const unsigned char *from,
150 unsigned char *to, RSA *rsa, int padding)
151 {
152 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
153 return 0;
154 }
155
156
157 static int cryptoapi_rsa_pub_dec(int flen, const unsigned char *from,
158 unsigned char *to, RSA *rsa, int padding)
159 {
160 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
161 return 0;
162 }
163
164
165 static int cryptoapi_rsa_priv_enc(int flen, const unsigned char *from,
166 unsigned char *to, RSA *rsa, int padding)
167 {
168 struct cryptoapi_rsa_data *priv =
169 (struct cryptoapi_rsa_data *) rsa->meth->app_data;
170 HCRYPTHASH hash;
171 DWORD hash_size, len, i;
172 unsigned char *buf = NULL;
173 int ret = 0;
174
175 if (priv == NULL) {
176 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
177 ERR_R_PASSED_NULL_PARAMETER);
178 return 0;
179 }
180
181 if (padding != RSA_PKCS1_PADDING) {
182 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
183 RSA_R_UNKNOWN_PADDING_TYPE);
184 return 0;
185 }
186
187 if (flen != 16 /* MD5 */ + 20 /* SHA-1 */) {
188 wpa_printf(MSG_INFO, "%s - only MD5-SHA1 hash supported",
189 __func__);
190 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
191 RSA_R_INVALID_MESSAGE_LENGTH);
192 return 0;
193 }
194
195 if (!CryptCreateHash(priv->crypt_prov, CALG_SSL3_SHAMD5, 0, 0, &hash))
196 {
197 cryptoapi_error("CryptCreateHash failed");
198 return 0;
199 }
200
201 len = sizeof(hash_size);
202 if (!CryptGetHashParam(hash, HP_HASHSIZE, (BYTE *) &hash_size, &len,
203 0)) {
204 cryptoapi_error("CryptGetHashParam failed");
205 goto err;
206 }
207
208 if ((int) hash_size != flen) {
209 wpa_printf(MSG_INFO, "CryptoAPI: Invalid hash size (%u != %d)",
210 (unsigned) hash_size, flen);
211 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
212 RSA_R_INVALID_MESSAGE_LENGTH);
213 goto err;
214 }
215 if (!CryptSetHashParam(hash, HP_HASHVAL, (BYTE * ) from, 0)) {
216 cryptoapi_error("CryptSetHashParam failed");
217 goto err;
218 }
219
220 len = RSA_size(rsa);
221 buf = os_malloc(len);
222 if (buf == NULL) {
223 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_MALLOC_FAILURE);
224 goto err;
225 }
226
227 if (!CryptSignHash(hash, priv->key_spec, NULL, 0, buf, &len)) {
228 cryptoapi_error("CryptSignHash failed");
229 goto err;
230 }
231
232 for (i = 0; i < len; i++)
233 to[i] = buf[len - i - 1];
234 ret = len;
235
236 err:
237 os_free(buf);
238 CryptDestroyHash(hash);
239
240 return ret;
241 }
242
243
244 static int cryptoapi_rsa_priv_dec(int flen, const unsigned char *from,
245 unsigned char *to, RSA *rsa, int padding)
246 {
247 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
248 return 0;
249 }
250
251
252 static void cryptoapi_free_data(struct cryptoapi_rsa_data *priv)
253 {
254 if (priv == NULL)
255 return;
256 if (priv->crypt_prov && priv->free_crypt_prov)
257 CryptReleaseContext(priv->crypt_prov, 0);
258 if (priv->cert)
259 CertFreeCertificateContext(priv->cert);
260 os_free(priv);
261 }
262
263
264 static int cryptoapi_finish(RSA *rsa)
265 {
266 cryptoapi_free_data((struct cryptoapi_rsa_data *) rsa->meth->app_data);
267 os_free((void *) rsa->meth);
268 rsa->meth = NULL;
269 return 1;
270 }
271
272
273 static const CERT_CONTEXT * cryptoapi_find_cert(const char *name, DWORD store)
274 {
275 HCERTSTORE cs;
276 const CERT_CONTEXT *ret = NULL;
277
278 cs = CertOpenStore((LPCSTR) CERT_STORE_PROV_SYSTEM, 0, 0,
279 store | CERT_STORE_OPEN_EXISTING_FLAG |
280 CERT_STORE_READONLY_FLAG, L"MY");
281 if (cs == NULL) {
282 cryptoapi_error("Failed to open 'My system store'");
283 return NULL;
284 }
285
286 if (strncmp(name, "cert://", 7) == 0) {
287 unsigned short wbuf[255];
288 MultiByteToWideChar(CP_ACP, 0, name + 7, -1, wbuf, 255);
289 ret = CertFindCertificateInStore(cs, X509_ASN_ENCODING |
290 PKCS_7_ASN_ENCODING,
291 0, CERT_FIND_SUBJECT_STR,
292 wbuf, NULL);
293 } else if (strncmp(name, "hash://", 7) == 0) {
294 CRYPT_HASH_BLOB blob;
295 int len;
296 const char *hash = name + 7;
297 unsigned char *buf;
298
299 len = os_strlen(hash) / 2;
300 buf = os_malloc(len);
301 if (buf && hexstr2bin(hash, buf, len) == 0) {
302 blob.cbData = len;
303 blob.pbData = buf;
304 ret = CertFindCertificateInStore(cs,
305 X509_ASN_ENCODING |
306 PKCS_7_ASN_ENCODING,
307 0, CERT_FIND_HASH,
308 &blob, NULL);
309 }
310 os_free(buf);
311 }
312
313 CertCloseStore(cs, 0);
314
315 return ret;
316 }
317
318
319 static int tls_cryptoapi_cert(SSL *ssl, const char *name)
320 {
321 X509 *cert = NULL;
322 RSA *rsa = NULL, *pub_rsa;
323 struct cryptoapi_rsa_data *priv;
324 RSA_METHOD *rsa_meth;
325
326 if (name == NULL ||
327 (strncmp(name, "cert://", 7) != 0 &&
328 strncmp(name, "hash://", 7) != 0))
329 return -1;
330
331 priv = os_zalloc(sizeof(*priv));
332 rsa_meth = os_zalloc(sizeof(*rsa_meth));
333 if (priv == NULL || rsa_meth == NULL) {
334 wpa_printf(MSG_WARNING, "CryptoAPI: Failed to allocate memory "
335 "for CryptoAPI RSA method");
336 os_free(priv);
337 os_free(rsa_meth);
338 return -1;
339 }
340
341 priv->cert = cryptoapi_find_cert(name, CERT_SYSTEM_STORE_CURRENT_USER);
342 if (priv->cert == NULL) {
343 priv->cert = cryptoapi_find_cert(
344 name, CERT_SYSTEM_STORE_LOCAL_MACHINE);
345 }
346 if (priv->cert == NULL) {
347 wpa_printf(MSG_INFO, "CryptoAPI: Could not find certificate "
348 "'%s'", name);
349 goto err;
350 }
351
352 cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &priv->cert->pbCertEncoded,
353 priv->cert->cbCertEncoded);
354 if (cert == NULL) {
355 wpa_printf(MSG_INFO, "CryptoAPI: Could not process X509 DER "
356 "encoding");
357 goto err;
358 }
359
360 if (!CryptAcquireCertificatePrivateKey(priv->cert,
361 CRYPT_ACQUIRE_COMPARE_KEY_FLAG,
362 NULL, &priv->crypt_prov,
363 &priv->key_spec,
364 &priv->free_crypt_prov)) {
365 cryptoapi_error("Failed to acquire a private key for the "
366 "certificate");
367 goto err;
368 }
369
370 rsa_meth->name = "Microsoft CryptoAPI RSA Method";
371 rsa_meth->rsa_pub_enc = cryptoapi_rsa_pub_enc;
372 rsa_meth->rsa_pub_dec = cryptoapi_rsa_pub_dec;
373 rsa_meth->rsa_priv_enc = cryptoapi_rsa_priv_enc;
374 rsa_meth->rsa_priv_dec = cryptoapi_rsa_priv_dec;
375 rsa_meth->finish = cryptoapi_finish;
376 rsa_meth->flags = RSA_METHOD_FLAG_NO_CHECK;
377 rsa_meth->app_data = (char *) priv;
378
379 rsa = RSA_new();
380 if (rsa == NULL) {
381 SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE,
382 ERR_R_MALLOC_FAILURE);
383 goto err;
384 }
385
386 if (!SSL_use_certificate(ssl, cert)) {
387 RSA_free(rsa);
388 rsa = NULL;
389 goto err;
390 }
391 pub_rsa = cert->cert_info->key->pkey->pkey.rsa;
392 X509_free(cert);
393 cert = NULL;
394
395 rsa->n = BN_dup(pub_rsa->n);
396 rsa->e = BN_dup(pub_rsa->e);
397 if (!RSA_set_method(rsa, rsa_meth))
398 goto err;
399
400 if (!SSL_use_RSAPrivateKey(ssl, rsa))
401 goto err;
402 RSA_free(rsa);
403
404 return 0;
405
406 err:
407 if (cert)
408 X509_free(cert);
409 if (rsa)
410 RSA_free(rsa);
411 else {
412 os_free(rsa_meth);
413 cryptoapi_free_data(priv);
414 }
415 return -1;
416 }
417
418
419 static int tls_cryptoapi_ca_cert(SSL_CTX *ssl_ctx, SSL *ssl, const char *name)
420 {
421 HCERTSTORE cs;
422 PCCERT_CONTEXT ctx = NULL;
423 X509 *cert;
424 char buf[128];
425 const char *store;
426 #ifdef UNICODE
427 WCHAR *wstore;
428 #endif /* UNICODE */
429
430 if (name == NULL || strncmp(name, "cert_store://", 13) != 0)
431 return -1;
432
433 store = name + 13;
434 #ifdef UNICODE
435 wstore = os_malloc((os_strlen(store) + 1) * sizeof(WCHAR));
436 if (wstore == NULL)
437 return -1;
438 wsprintf(wstore, L"%S", store);
439 cs = CertOpenSystemStore(0, wstore);
440 os_free(wstore);
441 #else /* UNICODE */
442 cs = CertOpenSystemStore(0, store);
443 #endif /* UNICODE */
444 if (cs == NULL) {
445 wpa_printf(MSG_DEBUG, "%s: failed to open system cert store "
446 "'%s': error=%d", __func__, store,
447 (int) GetLastError());
448 return -1;
449 }
450
451 while ((ctx = CertEnumCertificatesInStore(cs, ctx))) {
452 cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ctx->pbCertEncoded,
453 ctx->cbCertEncoded);
454 if (cert == NULL) {
455 wpa_printf(MSG_INFO, "CryptoAPI: Could not process "
456 "X509 DER encoding for CA cert");
457 continue;
458 }
459
460 X509_NAME_oneline(X509_get_subject_name(cert), buf,
461 sizeof(buf));
462 wpa_printf(MSG_DEBUG, "OpenSSL: Loaded CA certificate for "
463 "system certificate store: subject='%s'", buf);
464
465 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
466 tls_show_errors(MSG_WARNING, __func__,
467 "Failed to add ca_cert to OpenSSL "
468 "certificate store");
469 }
470
471 X509_free(cert);
472 }
473
474 if (!CertCloseStore(cs, 0)) {
475 wpa_printf(MSG_DEBUG, "%s: failed to close system cert store "
476 "'%s': error=%d", __func__, name + 13,
477 (int) GetLastError());
478 }
479
480 return 0;
481 }
482
483
484 #else /* CONFIG_NATIVE_WINDOWS */
485
486 static int tls_cryptoapi_cert(SSL *ssl, const char *name)
487 {
488 return -1;
489 }
490
491 #endif /* CONFIG_NATIVE_WINDOWS */
492
493
494 static void ssl_info_cb(const SSL *ssl, int where, int ret)
495 {
496 const char *str;
497 int w;
498
499 wpa_printf(MSG_DEBUG, "SSL: (where=0x%x ret=0x%x)", where, ret);
500 w = where & ~SSL_ST_MASK;
501 if (w & SSL_ST_CONNECT)
502 str = "SSL_connect";
503 else if (w & SSL_ST_ACCEPT)
504 str = "SSL_accept";
505 else
506 str = "undefined";
507
508 if (where & SSL_CB_LOOP) {
509 wpa_printf(MSG_DEBUG, "SSL: %s:%s",
510 str, SSL_state_string_long(ssl));
511 } else if (where & SSL_CB_ALERT) {
512 wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s",
513 where & SSL_CB_READ ?
514 "read (remote end reported an error)" :
515 "write (local SSL3 detected an error)",
516 SSL_alert_type_string_long(ret),
517 SSL_alert_desc_string_long(ret));
518 if ((ret >> 8) == SSL3_AL_FATAL) {
519 struct tls_connection *conn =
520 SSL_get_app_data((SSL *) ssl);
521 if (where & SSL_CB_READ)
522 conn->read_alerts++;
523 else
524 conn->write_alerts++;
525 }
526 } else if (where & SSL_CB_EXIT && ret <= 0) {
527 wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s",
528 str, ret == 0 ? "failed" : "error",
529 SSL_state_string_long(ssl));
530 }
531 }
532
533
534 #ifndef OPENSSL_NO_ENGINE
535 /**
536 * tls_engine_load_dynamic_generic - load any openssl engine
537 * @pre: an array of commands and values that load an engine initialized
538 * in the engine specific function
539 * @post: an array of commands and values that initialize an already loaded
540 * engine (or %NULL if not required)
541 * @id: the engine id of the engine to load (only required if post is not %NULL
542 *
543 * This function is a generic function that loads any openssl engine.
544 *
545 * Returns: 0 on success, -1 on failure
546 */
547 static int tls_engine_load_dynamic_generic(const char *pre[],
548 const char *post[], const char *id)
549 {
550 ENGINE *engine;
551 const char *dynamic_id = "dynamic";
552
553 engine = ENGINE_by_id(id);
554 if (engine) {
555 ENGINE_free(engine);
556 wpa_printf(MSG_DEBUG, "ENGINE: engine '%s' is already "
557 "available", id);
558 return 0;
559 }
560 ERR_clear_error();
561
562 engine = ENGINE_by_id(dynamic_id);
563 if (engine == NULL) {
564 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
565 dynamic_id,
566 ERR_error_string(ERR_get_error(), NULL));
567 return -1;
568 }
569
570 /* Perform the pre commands. This will load the engine. */
571 while (pre && pre[0]) {
572 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", pre[0], pre[1]);
573 if (ENGINE_ctrl_cmd_string(engine, pre[0], pre[1], 0) == 0) {
574 wpa_printf(MSG_INFO, "ENGINE: ctrl cmd_string failed: "
575 "%s %s [%s]", pre[0], pre[1],
576 ERR_error_string(ERR_get_error(), NULL));
577 ENGINE_free(engine);
578 return -1;
579 }
580 pre += 2;
581 }
582
583 /*
584 * Free the reference to the "dynamic" engine. The loaded engine can
585 * now be looked up using ENGINE_by_id().
586 */
587 ENGINE_free(engine);
588
589 engine = ENGINE_by_id(id);
590 if (engine == NULL) {
591 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
592 id, ERR_error_string(ERR_get_error(), NULL));
593 return -1;
594 }
595
596 while (post && post[0]) {
597 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", post[0], post[1]);
598 if (ENGINE_ctrl_cmd_string(engine, post[0], post[1], 0) == 0) {
599 wpa_printf(MSG_DEBUG, "ENGINE: ctrl cmd_string failed:"
600 " %s %s [%s]", post[0], post[1],
601 ERR_error_string(ERR_get_error(), NULL));
602 ENGINE_remove(engine);
603 ENGINE_free(engine);
604 return -1;
605 }
606 post += 2;
607 }
608 ENGINE_free(engine);
609
610 return 0;
611 }
612
613
614 /**
615 * tls_engine_load_dynamic_pkcs11 - load the pkcs11 engine provided by opensc
616 * @pkcs11_so_path: pksc11_so_path from the configuration
617 * @pcks11_module_path: pkcs11_module_path from the configuration
618 */
619 static int tls_engine_load_dynamic_pkcs11(const char *pkcs11_so_path,
620 const char *pkcs11_module_path)
621 {
622 char *engine_id = "pkcs11";
623 const char *pre_cmd[] = {
624 "SO_PATH", NULL /* pkcs11_so_path */,
625 "ID", NULL /* engine_id */,
626 "LIST_ADD", "1",
627 /* "NO_VCHECK", "1", */
628 "LOAD", NULL,
629 NULL, NULL
630 };
631 const char *post_cmd[] = {
632 "MODULE_PATH", NULL /* pkcs11_module_path */,
633 NULL, NULL
634 };
635
636 if (!pkcs11_so_path || !pkcs11_module_path)
637 return 0;
638
639 pre_cmd[1] = pkcs11_so_path;
640 pre_cmd[3] = engine_id;
641 post_cmd[1] = pkcs11_module_path;
642
643 wpa_printf(MSG_DEBUG, "ENGINE: Loading pkcs11 Engine from %s",
644 pkcs11_so_path);
645
646 return tls_engine_load_dynamic_generic(pre_cmd, post_cmd, engine_id);
647 }
648
649
650 /**
651 * tls_engine_load_dynamic_opensc - load the opensc engine provided by opensc
652 * @opensc_so_path: opensc_so_path from the configuration
653 */
654 static int tls_engine_load_dynamic_opensc(const char *opensc_so_path)
655 {
656 char *engine_id = "opensc";
657 const char *pre_cmd[] = {
658 "SO_PATH", NULL /* opensc_so_path */,
659 "ID", NULL /* engine_id */,
660 "LIST_ADD", "1",
661 "LOAD", NULL,
662 NULL, NULL
663 };
664
665 if (!opensc_so_path)
666 return 0;
667
668 pre_cmd[1] = opensc_so_path;
669 pre_cmd[3] = engine_id;
670
671 wpa_printf(MSG_DEBUG, "ENGINE: Loading OpenSC Engine from %s",
672 opensc_so_path);
673
674 return tls_engine_load_dynamic_generic(pre_cmd, NULL, engine_id);
675 }
676 #endif /* OPENSSL_NO_ENGINE */
677
678
679 void * tls_init(const struct tls_config *conf)
680 {
681 SSL_CTX *ssl;
682
683 if (tls_openssl_ref_count == 0) {
684 tls_global = os_zalloc(sizeof(*tls_global));
685 if (tls_global == NULL)
686 return NULL;
687 if (conf) {
688 tls_global->event_cb = conf->event_cb;
689 tls_global->cb_ctx = conf->cb_ctx;
690 }
691
692 #ifdef CONFIG_FIPS
693 #ifdef OPENSSL_FIPS
694 if (conf && conf->fips_mode) {
695 if (!FIPS_mode_set(1)) {
696 wpa_printf(MSG_ERROR, "Failed to enable FIPS "
697 "mode");
698 ERR_load_crypto_strings();
699 ERR_print_errors_fp(stderr);
700 return NULL;
701 } else
702 wpa_printf(MSG_INFO, "Running in FIPS mode");
703 }
704 #else /* OPENSSL_FIPS */
705 if (conf && conf->fips_mode) {
706 wpa_printf(MSG_ERROR, "FIPS mode requested, but not "
707 "supported");
708 return NULL;
709 }
710 #endif /* OPENSSL_FIPS */
711 #endif /* CONFIG_FIPS */
712 SSL_load_error_strings();
713 SSL_library_init();
714 #ifndef OPENSSL_NO_SHA256
715 EVP_add_digest(EVP_sha256());
716 #endif /* OPENSSL_NO_SHA256 */
717 /* TODO: if /dev/urandom is available, PRNG is seeded
718 * automatically. If this is not the case, random data should
719 * be added here. */
720
721 #ifdef PKCS12_FUNCS
722 #ifndef OPENSSL_NO_RC2
723 /*
724 * 40-bit RC2 is commonly used in PKCS#12 files, so enable it.
725 * This is enabled by PKCS12_PBE_add() in OpenSSL 0.9.8
726 * versions, but it looks like OpenSSL 1.0.0 does not do that
727 * anymore.
728 */
729 EVP_add_cipher(EVP_rc2_40_cbc());
730 #endif /* OPENSSL_NO_RC2 */
731 PKCS12_PBE_add();
732 #endif /* PKCS12_FUNCS */
733 }
734 tls_openssl_ref_count++;
735
736 ssl = SSL_CTX_new(TLSv1_method());
737 if (ssl == NULL)
738 return NULL;
739
740 SSL_CTX_set_info_callback(ssl, ssl_info_cb);
741
742 #ifndef OPENSSL_NO_ENGINE
743 if (conf &&
744 (conf->opensc_engine_path || conf->pkcs11_engine_path ||
745 conf->pkcs11_module_path)) {
746 wpa_printf(MSG_DEBUG, "ENGINE: Loading dynamic engine");
747 ERR_load_ENGINE_strings();
748 ENGINE_load_dynamic();
749
750 if (tls_engine_load_dynamic_opensc(conf->opensc_engine_path) ||
751 tls_engine_load_dynamic_pkcs11(conf->pkcs11_engine_path,
752 conf->pkcs11_module_path)) {
753 tls_deinit(ssl);
754 return NULL;
755 }
756 }
757 #endif /* OPENSSL_NO_ENGINE */
758
759 return ssl;
760 }
761
762
763 void tls_deinit(void *ssl_ctx)
764 {
765 SSL_CTX *ssl = ssl_ctx;
766 SSL_CTX_free(ssl);
767
768 tls_openssl_ref_count--;
769 if (tls_openssl_ref_count == 0) {
770 #ifndef OPENSSL_NO_ENGINE
771 ENGINE_cleanup();
772 #endif /* OPENSSL_NO_ENGINE */
773 CRYPTO_cleanup_all_ex_data();
774 ERR_remove_state(0);
775 ERR_free_strings();
776 EVP_cleanup();
777 os_free(tls_global);
778 tls_global = NULL;
779 }
780 }
781
782
783 static int tls_engine_init(struct tls_connection *conn, const char *engine_id,
784 const char *pin, const char *key_id,
785 const char *cert_id, const char *ca_cert_id)
786 {
787 #ifndef OPENSSL_NO_ENGINE
788 int ret = -1;
789 if (engine_id == NULL) {
790 wpa_printf(MSG_ERROR, "ENGINE: Engine ID not set");
791 return -1;
792 }
793 if (pin == NULL) {
794 wpa_printf(MSG_ERROR, "ENGINE: Smartcard PIN not set");
795 return -1;
796 }
797 if (key_id == NULL) {
798 wpa_printf(MSG_ERROR, "ENGINE: Key Id not set");
799 return -1;
800 }
801
802 ERR_clear_error();
803 conn->engine = ENGINE_by_id(engine_id);
804 if (!conn->engine) {
805 wpa_printf(MSG_ERROR, "ENGINE: engine %s not available [%s]",
806 engine_id, ERR_error_string(ERR_get_error(), NULL));
807 goto err;
808 }
809 if (ENGINE_init(conn->engine) != 1) {
810 wpa_printf(MSG_ERROR, "ENGINE: engine init failed "
811 "(engine: %s) [%s]", engine_id,
812 ERR_error_string(ERR_get_error(), NULL));
813 goto err;
814 }
815 wpa_printf(MSG_DEBUG, "ENGINE: engine initialized");
816
817 if (ENGINE_ctrl_cmd_string(conn->engine, "PIN", pin, 0) == 0) {
818 wpa_printf(MSG_ERROR, "ENGINE: cannot set pin [%s]",
819 ERR_error_string(ERR_get_error(), NULL));
820 goto err;
821 }
822 /* load private key first in-case PIN is required for cert */
823 conn->private_key = ENGINE_load_private_key(conn->engine,
824 key_id, NULL, NULL);
825 if (!conn->private_key) {
826 wpa_printf(MSG_ERROR, "ENGINE: cannot load private key with id"
827 " '%s' [%s]", key_id,
828 ERR_error_string(ERR_get_error(), NULL));
829 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
830 goto err;
831 }
832
833 /* handle a certificate and/or CA certificate */
834 if (cert_id || ca_cert_id) {
835 const char *cmd_name = "LOAD_CERT_CTRL";
836
837 /* test if the engine supports a LOAD_CERT_CTRL */
838 if (!ENGINE_ctrl(conn->engine, ENGINE_CTRL_GET_CMD_FROM_NAME,
839 0, (void *)cmd_name, NULL)) {
840 wpa_printf(MSG_ERROR, "ENGINE: engine does not support"
841 " loading certificates");
842 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
843 goto err;
844 }
845 }
846
847 return 0;
848
849 err:
850 if (conn->engine) {
851 ENGINE_free(conn->engine);
852 conn->engine = NULL;
853 }
854
855 if (conn->private_key) {
856 EVP_PKEY_free(conn->private_key);
857 conn->private_key = NULL;
858 }
859
860 return ret;
861 #else /* OPENSSL_NO_ENGINE */
862 return 0;
863 #endif /* OPENSSL_NO_ENGINE */
864 }
865
866
867 static void tls_engine_deinit(struct tls_connection *conn)
868 {
869 #ifndef OPENSSL_NO_ENGINE
870 wpa_printf(MSG_DEBUG, "ENGINE: engine deinit");
871 if (conn->private_key) {
872 EVP_PKEY_free(conn->private_key);
873 conn->private_key = NULL;
874 }
875 if (conn->engine) {
876 ENGINE_finish(conn->engine);
877 conn->engine = NULL;
878 }
879 #endif /* OPENSSL_NO_ENGINE */
880 }
881
882
883 int tls_get_errors(void *ssl_ctx)
884 {
885 int count = 0;
886 unsigned long err;
887
888 while ((err = ERR_get_error())) {
889 wpa_printf(MSG_INFO, "TLS - SSL error: %s",
890 ERR_error_string(err, NULL));
891 count++;
892 }
893
894 return count;
895 }
896
897 struct tls_connection * tls_connection_init(void *ssl_ctx)
898 {
899 SSL_CTX *ssl = ssl_ctx;
900 struct tls_connection *conn;
901 long options;
902
903 conn = os_zalloc(sizeof(*conn));
904 if (conn == NULL)
905 return NULL;
906 conn->ssl = SSL_new(ssl);
907 if (conn->ssl == NULL) {
908 tls_show_errors(MSG_INFO, __func__,
909 "Failed to initialize new SSL connection");
910 os_free(conn);
911 return NULL;
912 }
913
914 SSL_set_app_data(conn->ssl, conn);
915 options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 |
916 SSL_OP_SINGLE_DH_USE;
917 #ifdef SSL_OP_NO_COMPRESSION
918 options |= SSL_OP_NO_COMPRESSION;
919 #endif /* SSL_OP_NO_COMPRESSION */
920 SSL_set_options(conn->ssl, options);
921
922 conn->ssl_in = BIO_new(BIO_s_mem());
923 if (!conn->ssl_in) {
924 tls_show_errors(MSG_INFO, __func__,
925 "Failed to create a new BIO for ssl_in");
926 SSL_free(conn->ssl);
927 os_free(conn);
928 return NULL;
929 }
930
931 conn->ssl_out = BIO_new(BIO_s_mem());
932 if (!conn->ssl_out) {
933 tls_show_errors(MSG_INFO, __func__,
934 "Failed to create a new BIO for ssl_out");
935 SSL_free(conn->ssl);
936 BIO_free(conn->ssl_in);
937 os_free(conn);
938 return NULL;
939 }
940
941 SSL_set_bio(conn->ssl, conn->ssl_in, conn->ssl_out);
942
943 return conn;
944 }
945
946
947 void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn)
948 {
949 if (conn == NULL)
950 return;
951 SSL_free(conn->ssl);
952 tls_engine_deinit(conn);
953 os_free(conn->subject_match);
954 os_free(conn->altsubject_match);
955 os_free(conn->session_ticket);
956 os_free(conn);
957 }
958
959
960 int tls_connection_established(void *ssl_ctx, struct tls_connection *conn)
961 {
962 return conn ? SSL_is_init_finished(conn->ssl) : 0;
963 }
964
965
966 int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn)
967 {
968 if (conn == NULL)
969 return -1;
970
971 /* Shutdown previous TLS connection without notifying the peer
972 * because the connection was already terminated in practice
973 * and "close notify" shutdown alert would confuse AS. */
974 SSL_set_quiet_shutdown(conn->ssl, 1);
975 SSL_shutdown(conn->ssl);
976 return 0;
977 }
978
979
980 static int tls_match_altsubject_component(X509 *cert, int type,
981 const char *value, size_t len)
982 {
983 GENERAL_NAME *gen;
984 void *ext;
985 int i, found = 0;
986
987 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
988
989 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
990 gen = sk_GENERAL_NAME_value(ext, i);
991 if (gen->type != type)
992 continue;
993 if (os_strlen((char *) gen->d.ia5->data) == len &&
994 os_memcmp(value, gen->d.ia5->data, len) == 0)
995 found++;
996 }
997
998 return found;
999 }
1000
1001
1002 static int tls_match_altsubject(X509 *cert, const char *match)
1003 {
1004 int type;
1005 const char *pos, *end;
1006 size_t len;
1007
1008 pos = match;
1009 do {
1010 if (os_strncmp(pos, "EMAIL:", 6) == 0) {
1011 type = GEN_EMAIL;
1012 pos += 6;
1013 } else if (os_strncmp(pos, "DNS:", 4) == 0) {
1014 type = GEN_DNS;
1015 pos += 4;
1016 } else if (os_strncmp(pos, "URI:", 4) == 0) {
1017 type = GEN_URI;
1018 pos += 4;
1019 } else {
1020 wpa_printf(MSG_INFO, "TLS: Invalid altSubjectName "
1021 "match '%s'", pos);
1022 return 0;
1023 }
1024 end = os_strchr(pos, ';');
1025 while (end) {
1026 if (os_strncmp(end + 1, "EMAIL:", 6) == 0 ||
1027 os_strncmp(end + 1, "DNS:", 4) == 0 ||
1028 os_strncmp(end + 1, "URI:", 4) == 0)
1029 break;
1030 end = os_strchr(end + 1, ';');
1031 }
1032 if (end)
1033 len = end - pos;
1034 else
1035 len = os_strlen(pos);
1036 if (tls_match_altsubject_component(cert, type, pos, len) > 0)
1037 return 1;
1038 pos = end + 1;
1039 } while (end);
1040
1041 return 0;
1042 }
1043
1044
1045 static enum tls_fail_reason openssl_tls_fail_reason(int err)
1046 {
1047 switch (err) {
1048 case X509_V_ERR_CERT_REVOKED:
1049 return TLS_FAIL_REVOKED;
1050 case X509_V_ERR_CERT_NOT_YET_VALID:
1051 case X509_V_ERR_CRL_NOT_YET_VALID:
1052 return TLS_FAIL_NOT_YET_VALID;
1053 case X509_V_ERR_CERT_HAS_EXPIRED:
1054 case X509_V_ERR_CRL_HAS_EXPIRED:
1055 return TLS_FAIL_EXPIRED;
1056 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
1057 case X509_V_ERR_UNABLE_TO_GET_CRL:
1058 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
1059 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
1060 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
1061 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
1062 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
1063 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
1064 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
1065 case X509_V_ERR_INVALID_CA:
1066 return TLS_FAIL_UNTRUSTED;
1067 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
1068 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
1069 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
1070 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
1071 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
1072 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
1073 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
1074 case X509_V_ERR_CERT_UNTRUSTED:
1075 case X509_V_ERR_CERT_REJECTED:
1076 return TLS_FAIL_BAD_CERTIFICATE;
1077 default:
1078 return TLS_FAIL_UNSPECIFIED;
1079 }
1080 }
1081
1082
1083 static struct wpabuf * get_x509_cert(X509 *cert)
1084 {
1085 struct wpabuf *buf;
1086 u8 *tmp;
1087
1088 int cert_len = i2d_X509(cert, NULL);
1089 if (cert_len <= 0)
1090 return NULL;
1091
1092 buf = wpabuf_alloc(cert_len);
1093 if (buf == NULL)
1094 return NULL;
1095
1096 tmp = wpabuf_put(buf, cert_len);
1097 i2d_X509(cert, &tmp);
1098 return buf;
1099 }
1100
1101
1102 static void openssl_tls_fail_event(struct tls_connection *conn,
1103 X509 *err_cert, int err, int depth,
1104 const char *subject, const char *err_str,
1105 enum tls_fail_reason reason)
1106 {
1107 union tls_event_data ev;
1108 struct wpabuf *cert = NULL;
1109
1110 if (tls_global->event_cb == NULL)
1111 return;
1112
1113 cert = get_x509_cert(err_cert);
1114 os_memset(&ev, 0, sizeof(ev));
1115 ev.cert_fail.reason = reason != TLS_FAIL_UNSPECIFIED ?
1116 reason : openssl_tls_fail_reason(err);
1117 ev.cert_fail.depth = depth;
1118 ev.cert_fail.subject = subject;
1119 ev.cert_fail.reason_txt = err_str;
1120 ev.cert_fail.cert = cert;
1121 tls_global->event_cb(tls_global->cb_ctx, TLS_CERT_CHAIN_FAILURE, &ev);
1122 wpabuf_free(cert);
1123 }
1124
1125
1126 static void openssl_tls_cert_event(struct tls_connection *conn,
1127 X509 *err_cert, int depth,
1128 const char *subject)
1129 {
1130 struct wpabuf *cert = NULL;
1131 union tls_event_data ev;
1132 #ifdef CONFIG_SHA256
1133 u8 hash[32];
1134 #endif /* CONFIG_SHA256 */
1135
1136 if (tls_global->event_cb == NULL)
1137 return;
1138
1139 os_memset(&ev, 0, sizeof(ev));
1140 if (conn->cert_probe) {
1141 cert = get_x509_cert(err_cert);
1142 ev.peer_cert.cert = cert;
1143 }
1144 #ifdef CONFIG_SHA256
1145 if (cert) {
1146 const u8 *addr[1];
1147 size_t len[1];
1148 addr[0] = wpabuf_head(cert);
1149 len[0] = wpabuf_len(cert);
1150 if (sha256_vector(1, addr, len, hash) == 0) {
1151 ev.peer_cert.hash = hash;
1152 ev.peer_cert.hash_len = sizeof(hash);
1153 }
1154 }
1155 #endif /* CONFIG_SHA256 */
1156 ev.peer_cert.depth = depth;
1157 ev.peer_cert.subject = subject;
1158 tls_global->event_cb(tls_global->cb_ctx, TLS_PEER_CERTIFICATE, &ev);
1159 wpabuf_free(cert);
1160 }
1161
1162
1163 static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
1164 {
1165 char buf[256];
1166 X509 *err_cert;
1167 int err, depth;
1168 SSL *ssl;
1169 struct tls_connection *conn;
1170 char *match, *altmatch;
1171 const char *err_str;
1172
1173 err_cert = X509_STORE_CTX_get_current_cert(x509_ctx);
1174 err = X509_STORE_CTX_get_error(x509_ctx);
1175 depth = X509_STORE_CTX_get_error_depth(x509_ctx);
1176 ssl = X509_STORE_CTX_get_ex_data(x509_ctx,
1177 SSL_get_ex_data_X509_STORE_CTX_idx());
1178 X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf));
1179
1180 conn = SSL_get_app_data(ssl);
1181 match = conn ? conn->subject_match : NULL;
1182 altmatch = conn ? conn->altsubject_match : NULL;
1183
1184 if (!preverify_ok && !conn->ca_cert_verify)
1185 preverify_ok = 1;
1186 if (!preverify_ok && depth > 0 && conn->server_cert_only)
1187 preverify_ok = 1;
1188
1189 err_str = X509_verify_cert_error_string(err);
1190
1191 #ifdef CONFIG_SHA256
1192 if (preverify_ok && depth == 0 && conn->server_cert_only) {
1193 struct wpabuf *cert;
1194 cert = get_x509_cert(err_cert);
1195 if (!cert) {
1196 wpa_printf(MSG_DEBUG, "OpenSSL: Could not fetch "
1197 "server certificate data");
1198 preverify_ok = 0;
1199 } else {
1200 u8 hash[32];
1201 const u8 *addr[1];
1202 size_t len[1];
1203 addr[0] = wpabuf_head(cert);
1204 len[0] = wpabuf_len(cert);
1205 if (sha256_vector(1, addr, len, hash) < 0 ||
1206 os_memcmp(conn->srv_cert_hash, hash, 32) != 0) {
1207 err_str = "Server certificate mismatch";
1208 err = X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN;
1209 preverify_ok = 0;
1210 }
1211 wpabuf_free(cert);
1212 }
1213 }
1214 #endif /* CONFIG_SHA256 */
1215
1216 if (!preverify_ok) {
1217 wpa_printf(MSG_WARNING, "TLS: Certificate verification failed,"
1218 " error %d (%s) depth %d for '%s'", err, err_str,
1219 depth, buf);
1220 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1221 err_str, TLS_FAIL_UNSPECIFIED);
1222 return preverify_ok;
1223 }
1224
1225 wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - preverify_ok=%d "
1226 "err=%d (%s) ca_cert_verify=%d depth=%d buf='%s'",
1227 preverify_ok, err, err_str,
1228 conn->ca_cert_verify, depth, buf);
1229 if (depth == 0 && match && os_strstr(buf, match) == NULL) {
1230 wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not "
1231 "match with '%s'", buf, match);
1232 preverify_ok = 0;
1233 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1234 "Subject mismatch",
1235 TLS_FAIL_SUBJECT_MISMATCH);
1236 } else if (depth == 0 && altmatch &&
1237 !tls_match_altsubject(err_cert, altmatch)) {
1238 wpa_printf(MSG_WARNING, "TLS: altSubjectName match "
1239 "'%s' not found", altmatch);
1240 preverify_ok = 0;
1241 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1242 "AltSubject mismatch",
1243 TLS_FAIL_ALTSUBJECT_MISMATCH);
1244 } else
1245 openssl_tls_cert_event(conn, err_cert, depth, buf);
1246
1247 if (conn->cert_probe && preverify_ok && depth == 0) {
1248 wpa_printf(MSG_DEBUG, "OpenSSL: Reject server certificate "
1249 "on probe-only run");
1250 preverify_ok = 0;
1251 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1252 "Server certificate chain probe",
1253 TLS_FAIL_SERVER_CHAIN_PROBE);
1254 }
1255
1256 return preverify_ok;
1257 }
1258
1259
1260 #ifndef OPENSSL_NO_STDIO
1261 static int tls_load_ca_der(void *_ssl_ctx, const char *ca_cert)
1262 {
1263 SSL_CTX *ssl_ctx = _ssl_ctx;
1264 X509_LOOKUP *lookup;
1265 int ret = 0;
1266
1267 lookup = X509_STORE_add_lookup(ssl_ctx->cert_store,
1268 X509_LOOKUP_file());
1269 if (lookup == NULL) {
1270 tls_show_errors(MSG_WARNING, __func__,
1271 "Failed add lookup for X509 store");
1272 return -1;
1273 }
1274
1275 if (!X509_LOOKUP_load_file(lookup, ca_cert, X509_FILETYPE_ASN1)) {
1276 unsigned long err = ERR_peek_error();
1277 tls_show_errors(MSG_WARNING, __func__,
1278 "Failed load CA in DER format");
1279 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1280 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1281 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1282 "cert already in hash table error",
1283 __func__);
1284 } else
1285 ret = -1;
1286 }
1287
1288 return ret;
1289 }
1290 #endif /* OPENSSL_NO_STDIO */
1291
1292
1293 static int tls_connection_ca_cert(void *_ssl_ctx, struct tls_connection *conn,
1294 const char *ca_cert, const u8 *ca_cert_blob,
1295 size_t ca_cert_blob_len, const char *ca_path)
1296 {
1297 SSL_CTX *ssl_ctx = _ssl_ctx;
1298
1299 /*
1300 * Remove previously configured trusted CA certificates before adding
1301 * new ones.
1302 */
1303 X509_STORE_free(ssl_ctx->cert_store);
1304 ssl_ctx->cert_store = X509_STORE_new();
1305 if (ssl_ctx->cert_store == NULL) {
1306 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
1307 "certificate store", __func__);
1308 return -1;
1309 }
1310
1311 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1312 conn->ca_cert_verify = 1;
1313
1314 if (ca_cert && os_strncmp(ca_cert, "probe://", 8) == 0) {
1315 wpa_printf(MSG_DEBUG, "OpenSSL: Probe for server certificate "
1316 "chain");
1317 conn->cert_probe = 1;
1318 conn->ca_cert_verify = 0;
1319 return 0;
1320 }
1321
1322 if (ca_cert && os_strncmp(ca_cert, "hash://", 7) == 0) {
1323 #ifdef CONFIG_SHA256
1324 const char *pos = ca_cert + 7;
1325 if (os_strncmp(pos, "server/sha256/", 14) != 0) {
1326 wpa_printf(MSG_DEBUG, "OpenSSL: Unsupported ca_cert "
1327 "hash value '%s'", ca_cert);
1328 return -1;
1329 }
1330 pos += 14;
1331 if (os_strlen(pos) != 32 * 2) {
1332 wpa_printf(MSG_DEBUG, "OpenSSL: Unexpected SHA256 "
1333 "hash length in ca_cert '%s'", ca_cert);
1334 return -1;
1335 }
1336 if (hexstr2bin(pos, conn->srv_cert_hash, 32) < 0) {
1337 wpa_printf(MSG_DEBUG, "OpenSSL: Invalid SHA256 hash "
1338 "value in ca_cert '%s'", ca_cert);
1339 return -1;
1340 }
1341 conn->server_cert_only = 1;
1342 wpa_printf(MSG_DEBUG, "OpenSSL: Checking only server "
1343 "certificate match");
1344 return 0;
1345 #else /* CONFIG_SHA256 */
1346 wpa_printf(MSG_INFO, "No SHA256 included in the build - "
1347 "cannot validate server certificate hash");
1348 return -1;
1349 #endif /* CONFIG_SHA256 */
1350 }
1351
1352 if (ca_cert_blob) {
1353 X509 *cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ca_cert_blob,
1354 ca_cert_blob_len);
1355 if (cert == NULL) {
1356 tls_show_errors(MSG_WARNING, __func__,
1357 "Failed to parse ca_cert_blob");
1358 return -1;
1359 }
1360
1361 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
1362 unsigned long err = ERR_peek_error();
1363 tls_show_errors(MSG_WARNING, __func__,
1364 "Failed to add ca_cert_blob to "
1365 "certificate store");
1366 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1367 ERR_GET_REASON(err) ==
1368 X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1369 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1370 "cert already in hash table error",
1371 __func__);
1372 } else {
1373 X509_free(cert);
1374 return -1;
1375 }
1376 }
1377 X509_free(cert);
1378 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob "
1379 "to certificate store", __func__);
1380 return 0;
1381 }
1382
1383 #ifdef CONFIG_NATIVE_WINDOWS
1384 if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) ==
1385 0) {
1386 wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from "
1387 "system certificate store");
1388 return 0;
1389 }
1390 #endif /* CONFIG_NATIVE_WINDOWS */
1391
1392 if (ca_cert || ca_path) {
1393 #ifndef OPENSSL_NO_STDIO
1394 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) !=
1395 1) {
1396 tls_show_errors(MSG_WARNING, __func__,
1397 "Failed to load root certificates");
1398 if (ca_cert &&
1399 tls_load_ca_der(ssl_ctx, ca_cert) == 0) {
1400 wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded "
1401 "DER format CA certificate",
1402 __func__);
1403 } else
1404 return -1;
1405 } else {
1406 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1407 "certificate(s) loaded");
1408 tls_get_errors(ssl_ctx);
1409 }
1410 #else /* OPENSSL_NO_STDIO */
1411 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
1412 __func__);
1413 return -1;
1414 #endif /* OPENSSL_NO_STDIO */
1415 } else {
1416 /* No ca_cert configured - do not try to verify server
1417 * certificate */
1418 conn->ca_cert_verify = 0;
1419 }
1420
1421 return 0;
1422 }
1423
1424
1425 static int tls_global_ca_cert(SSL_CTX *ssl_ctx, const char *ca_cert)
1426 {
1427 if (ca_cert) {
1428 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1)
1429 {
1430 tls_show_errors(MSG_WARNING, __func__,
1431 "Failed to load root certificates");
1432 return -1;
1433 }
1434
1435 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1436 "certificate(s) loaded");
1437
1438 #ifndef OPENSSL_NO_STDIO
1439 /* Add the same CAs to the client certificate requests */
1440 SSL_CTX_set_client_CA_list(ssl_ctx,
1441 SSL_load_client_CA_file(ca_cert));
1442 #endif /* OPENSSL_NO_STDIO */
1443 }
1444
1445 return 0;
1446 }
1447
1448
1449 int tls_global_set_verify(void *ssl_ctx, int check_crl)
1450 {
1451 int flags;
1452
1453 if (check_crl) {
1454 X509_STORE *cs = SSL_CTX_get_cert_store(ssl_ctx);
1455 if (cs == NULL) {
1456 tls_show_errors(MSG_INFO, __func__, "Failed to get "
1457 "certificate store when enabling "
1458 "check_crl");
1459 return -1;
1460 }
1461 flags = X509_V_FLAG_CRL_CHECK;
1462 if (check_crl == 2)
1463 flags |= X509_V_FLAG_CRL_CHECK_ALL;
1464 X509_STORE_set_flags(cs, flags);
1465 }
1466 return 0;
1467 }
1468
1469
1470 static int tls_connection_set_subject_match(struct tls_connection *conn,
1471 const char *subject_match,
1472 const char *altsubject_match)
1473 {
1474 os_free(conn->subject_match);
1475 conn->subject_match = NULL;
1476 if (subject_match) {
1477 conn->subject_match = os_strdup(subject_match);
1478 if (conn->subject_match == NULL)
1479 return -1;
1480 }
1481
1482 os_free(conn->altsubject_match);
1483 conn->altsubject_match = NULL;
1484 if (altsubject_match) {
1485 conn->altsubject_match = os_strdup(altsubject_match);
1486 if (conn->altsubject_match == NULL)
1487 return -1;
1488 }
1489
1490 return 0;
1491 }
1492
1493
1494 int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn,
1495 int verify_peer)
1496 {
1497 static int counter = 0;
1498
1499 if (conn == NULL)
1500 return -1;
1501
1502 if (verify_peer) {
1503 conn->ca_cert_verify = 1;
1504 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER |
1505 SSL_VERIFY_FAIL_IF_NO_PEER_CERT |
1506 SSL_VERIFY_CLIENT_ONCE, tls_verify_cb);
1507 } else {
1508 conn->ca_cert_verify = 0;
1509 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
1510 }
1511
1512 SSL_set_accept_state(conn->ssl);
1513
1514 /*
1515 * Set session id context in order to avoid fatal errors when client
1516 * tries to resume a session. However, set the context to a unique
1517 * value in order to effectively disable session resumption for now
1518 * since not all areas of the server code are ready for it (e.g.,
1519 * EAP-TTLS needs special handling for Phase 2 after abbreviated TLS
1520 * handshake).
1521 */
1522 counter++;
1523 SSL_set_session_id_context(conn->ssl,
1524 (const unsigned char *) &counter,
1525 sizeof(counter));
1526
1527 return 0;
1528 }
1529
1530
1531 static int tls_connection_client_cert(struct tls_connection *conn,
1532 const char *client_cert,
1533 const u8 *client_cert_blob,
1534 size_t client_cert_blob_len)
1535 {
1536 if (client_cert == NULL && client_cert_blob == NULL)
1537 return 0;
1538
1539 if (client_cert_blob &&
1540 SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob,
1541 client_cert_blob_len) == 1) {
1542 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> "
1543 "OK");
1544 return 0;
1545 } else if (client_cert_blob) {
1546 tls_show_errors(MSG_DEBUG, __func__,
1547 "SSL_use_certificate_ASN1 failed");
1548 }
1549
1550 if (client_cert == NULL)
1551 return -1;
1552
1553 #ifndef OPENSSL_NO_STDIO
1554 if (SSL_use_certificate_file(conn->ssl, client_cert,
1555 SSL_FILETYPE_ASN1) == 1) {
1556 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)"
1557 " --> OK");
1558 return 0;
1559 } else {
1560 tls_show_errors(MSG_DEBUG, __func__,
1561 "SSL_use_certificate_file (DER) failed");
1562 }
1563
1564 if (SSL_use_certificate_file(conn->ssl, client_cert,
1565 SSL_FILETYPE_PEM) == 1) {
1566 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)"
1567 " --> OK");
1568 return 0;
1569 } else {
1570 tls_show_errors(MSG_DEBUG, __func__,
1571 "SSL_use_certificate_file (PEM) failed");
1572 }
1573 #else /* OPENSSL_NO_STDIO */
1574 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1575 #endif /* OPENSSL_NO_STDIO */
1576
1577 return -1;
1578 }
1579
1580
1581 static int tls_global_client_cert(SSL_CTX *ssl_ctx, const char *client_cert)
1582 {
1583 #ifndef OPENSSL_NO_STDIO
1584 if (client_cert == NULL)
1585 return 0;
1586
1587 if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1588 SSL_FILETYPE_ASN1) != 1 &&
1589 SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1590 SSL_FILETYPE_PEM) != 1) {
1591 tls_show_errors(MSG_INFO, __func__,
1592 "Failed to load client certificate");
1593 return -1;
1594 }
1595 return 0;
1596 #else /* OPENSSL_NO_STDIO */
1597 if (client_cert == NULL)
1598 return 0;
1599 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1600 return -1;
1601 #endif /* OPENSSL_NO_STDIO */
1602 }
1603
1604
1605 static int tls_passwd_cb(char *buf, int size, int rwflag, void *password)
1606 {
1607 if (password == NULL) {
1608 return 0;
1609 }
1610 os_strlcpy(buf, (char *) password, size);
1611 return os_strlen(buf);
1612 }
1613
1614
1615 #ifdef PKCS12_FUNCS
1616 static int tls_parse_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, PKCS12 *p12,
1617 const char *passwd)
1618 {
1619 EVP_PKEY *pkey;
1620 X509 *cert;
1621 STACK_OF(X509) *certs;
1622 int res = 0;
1623 char buf[256];
1624
1625 pkey = NULL;
1626 cert = NULL;
1627 certs = NULL;
1628 if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) {
1629 tls_show_errors(MSG_DEBUG, __func__,
1630 "Failed to parse PKCS12 file");
1631 PKCS12_free(p12);
1632 return -1;
1633 }
1634 wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data");
1635
1636 if (cert) {
1637 X509_NAME_oneline(X509_get_subject_name(cert), buf,
1638 sizeof(buf));
1639 wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: "
1640 "subject='%s'", buf);
1641 if (ssl) {
1642 if (SSL_use_certificate(ssl, cert) != 1)
1643 res = -1;
1644 } else {
1645 if (SSL_CTX_use_certificate(ssl_ctx, cert) != 1)
1646 res = -1;
1647 }
1648 X509_free(cert);
1649 }
1650
1651 if (pkey) {
1652 wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12");
1653 if (ssl) {
1654 if (SSL_use_PrivateKey(ssl, pkey) != 1)
1655 res = -1;
1656 } else {
1657 if (SSL_CTX_use_PrivateKey(ssl_ctx, pkey) != 1)
1658 res = -1;
1659 }
1660 EVP_PKEY_free(pkey);
1661 }
1662
1663 if (certs) {
1664 while ((cert = sk_X509_pop(certs)) != NULL) {
1665 X509_NAME_oneline(X509_get_subject_name(cert), buf,
1666 sizeof(buf));
1667 wpa_printf(MSG_DEBUG, "TLS: additional certificate"
1668 " from PKCS12: subject='%s'", buf);
1669 /*
1670 * There is no SSL equivalent for the chain cert - so
1671 * always add it to the context...
1672 */
1673 if (SSL_CTX_add_extra_chain_cert(ssl_ctx, cert) != 1) {
1674 res = -1;
1675 break;
1676 }
1677 }
1678 sk_X509_free(certs);
1679 }
1680
1681 PKCS12_free(p12);
1682
1683 if (res < 0)
1684 tls_get_errors(ssl_ctx);
1685
1686 return res;
1687 }
1688 #endif /* PKCS12_FUNCS */
1689
1690
1691 static int tls_read_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, const char *private_key,
1692 const char *passwd)
1693 {
1694 #ifdef PKCS12_FUNCS
1695 FILE *f;
1696 PKCS12 *p12;
1697
1698 f = fopen(private_key, "rb");
1699 if (f == NULL)
1700 return -1;
1701
1702 p12 = d2i_PKCS12_fp(f, NULL);
1703 fclose(f);
1704
1705 if (p12 == NULL) {
1706 tls_show_errors(MSG_INFO, __func__,
1707 "Failed to use PKCS#12 file");
1708 return -1;
1709 }
1710
1711 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
1712
1713 #else /* PKCS12_FUNCS */
1714 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read "
1715 "p12/pfx files");
1716 return -1;
1717 #endif /* PKCS12_FUNCS */
1718 }
1719
1720
1721 static int tls_read_pkcs12_blob(SSL_CTX *ssl_ctx, SSL *ssl,
1722 const u8 *blob, size_t len, const char *passwd)
1723 {
1724 #ifdef PKCS12_FUNCS
1725 PKCS12 *p12;
1726
1727 p12 = d2i_PKCS12(NULL, (OPENSSL_d2i_TYPE) &blob, len);
1728 if (p12 == NULL) {
1729 tls_show_errors(MSG_INFO, __func__,
1730 "Failed to use PKCS#12 blob");
1731 return -1;
1732 }
1733
1734 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
1735
1736 #else /* PKCS12_FUNCS */
1737 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse "
1738 "p12/pfx blobs");
1739 return -1;
1740 #endif /* PKCS12_FUNCS */
1741 }
1742
1743
1744 #ifndef OPENSSL_NO_ENGINE
1745 static int tls_engine_get_cert(struct tls_connection *conn,
1746 const char *cert_id,
1747 X509 **cert)
1748 {
1749 /* this runs after the private key is loaded so no PIN is required */
1750 struct {
1751 const char *cert_id;
1752 X509 *cert;
1753 } params;
1754 params.cert_id = cert_id;
1755 params.cert = NULL;
1756
1757 if (!ENGINE_ctrl_cmd(conn->engine, "LOAD_CERT_CTRL",
1758 0, &params, NULL, 1)) {
1759 wpa_printf(MSG_ERROR, "ENGINE: cannot load client cert with id"
1760 " '%s' [%s]", cert_id,
1761 ERR_error_string(ERR_get_error(), NULL));
1762 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
1763 }
1764 if (!params.cert) {
1765 wpa_printf(MSG_ERROR, "ENGINE: did not properly cert with id"
1766 " '%s'", cert_id);
1767 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
1768 }
1769 *cert = params.cert;
1770 return 0;
1771 }
1772 #endif /* OPENSSL_NO_ENGINE */
1773
1774
1775 static int tls_connection_engine_client_cert(struct tls_connection *conn,
1776 const char *cert_id)
1777 {
1778 #ifndef OPENSSL_NO_ENGINE
1779 X509 *cert;
1780
1781 if (tls_engine_get_cert(conn, cert_id, &cert))
1782 return -1;
1783
1784 if (!SSL_use_certificate(conn->ssl, cert)) {
1785 tls_show_errors(MSG_ERROR, __func__,
1786 "SSL_use_certificate failed");
1787 X509_free(cert);
1788 return -1;
1789 }
1790 X509_free(cert);
1791 wpa_printf(MSG_DEBUG, "ENGINE: SSL_use_certificate --> "
1792 "OK");
1793 return 0;
1794
1795 #else /* OPENSSL_NO_ENGINE */
1796 return -1;
1797 #endif /* OPENSSL_NO_ENGINE */
1798 }
1799
1800
1801 static int tls_connection_engine_ca_cert(void *_ssl_ctx,
1802 struct tls_connection *conn,
1803 const char *ca_cert_id)
1804 {
1805 #ifndef OPENSSL_NO_ENGINE
1806 X509 *cert;
1807 SSL_CTX *ssl_ctx = _ssl_ctx;
1808
1809 if (tls_engine_get_cert(conn, ca_cert_id, &cert))
1810 return -1;
1811
1812 /* start off the same as tls_connection_ca_cert */
1813 X509_STORE_free(ssl_ctx->cert_store);
1814 ssl_ctx->cert_store = X509_STORE_new();
1815 if (ssl_ctx->cert_store == NULL) {
1816 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
1817 "certificate store", __func__);
1818 X509_free(cert);
1819 return -1;
1820 }
1821 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
1822 unsigned long err = ERR_peek_error();
1823 tls_show_errors(MSG_WARNING, __func__,
1824 "Failed to add CA certificate from engine "
1825 "to certificate store");
1826 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1827 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1828 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring cert"
1829 " already in hash table error",
1830 __func__);
1831 } else {
1832 X509_free(cert);
1833 return -1;
1834 }
1835 }
1836 X509_free(cert);
1837 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added CA certificate from engine "
1838 "to certificate store", __func__);
1839 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1840 return 0;
1841
1842 #else /* OPENSSL_NO_ENGINE */
1843 return -1;
1844 #endif /* OPENSSL_NO_ENGINE */
1845 }
1846
1847
1848 static int tls_connection_engine_private_key(struct tls_connection *conn)
1849 {
1850 #ifndef OPENSSL_NO_ENGINE
1851 if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) {
1852 tls_show_errors(MSG_ERROR, __func__,
1853 "ENGINE: cannot use private key for TLS");
1854 return -1;
1855 }
1856 if (!SSL_check_private_key(conn->ssl)) {
1857 tls_show_errors(MSG_INFO, __func__,
1858 "Private key failed verification");
1859 return -1;
1860 }
1861 return 0;
1862 #else /* OPENSSL_NO_ENGINE */
1863 wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but "
1864 "engine support was not compiled in");
1865 return -1;
1866 #endif /* OPENSSL_NO_ENGINE */
1867 }
1868
1869
1870 static int tls_connection_private_key(void *_ssl_ctx,
1871 struct tls_connection *conn,
1872 const char *private_key,
1873 const char *private_key_passwd,
1874 const u8 *private_key_blob,
1875 size_t private_key_blob_len)
1876 {
1877 SSL_CTX *ssl_ctx = _ssl_ctx;
1878 char *passwd;
1879 int ok;
1880
1881 if (private_key == NULL && private_key_blob == NULL)
1882 return 0;
1883
1884 if (private_key_passwd) {
1885 passwd = os_strdup(private_key_passwd);
1886 if (passwd == NULL)
1887 return -1;
1888 } else
1889 passwd = NULL;
1890
1891 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
1892 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
1893
1894 ok = 0;
1895 while (private_key_blob) {
1896 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl,
1897 (u8 *) private_key_blob,
1898 private_key_blob_len) == 1) {
1899 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
1900 "ASN1(EVP_PKEY_RSA) --> OK");
1901 ok = 1;
1902 break;
1903 } else {
1904 tls_show_errors(MSG_DEBUG, __func__,
1905 "SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA)"
1906 " failed");
1907 }
1908
1909 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl,
1910 (u8 *) private_key_blob,
1911 private_key_blob_len) == 1) {
1912 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
1913 "ASN1(EVP_PKEY_DSA) --> OK");
1914 ok = 1;
1915 break;
1916 } else {
1917 tls_show_errors(MSG_DEBUG, __func__,
1918 "SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA)"
1919 " failed");
1920 }
1921
1922 if (SSL_use_RSAPrivateKey_ASN1(conn->ssl,
1923 (u8 *) private_key_blob,
1924 private_key_blob_len) == 1) {
1925 wpa_printf(MSG_DEBUG, "OpenSSL: "
1926 "SSL_use_RSAPrivateKey_ASN1 --> OK");
1927 ok = 1;
1928 break;
1929 } else {
1930 tls_show_errors(MSG_DEBUG, __func__,
1931 "SSL_use_RSAPrivateKey_ASN1 failed");
1932 }
1933
1934 if (tls_read_pkcs12_blob(ssl_ctx, conn->ssl, private_key_blob,
1935 private_key_blob_len, passwd) == 0) {
1936 wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> "
1937 "OK");
1938 ok = 1;
1939 break;
1940 }
1941
1942 break;
1943 }
1944
1945 while (!ok && private_key) {
1946 #ifndef OPENSSL_NO_STDIO
1947 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
1948 SSL_FILETYPE_ASN1) == 1) {
1949 wpa_printf(MSG_DEBUG, "OpenSSL: "
1950 "SSL_use_PrivateKey_File (DER) --> OK");
1951 ok = 1;
1952 break;
1953 } else {
1954 tls_show_errors(MSG_DEBUG, __func__,
1955 "SSL_use_PrivateKey_File (DER) "
1956 "failed");
1957 }
1958
1959 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
1960 SSL_FILETYPE_PEM) == 1) {
1961 wpa_printf(MSG_DEBUG, "OpenSSL: "
1962 "SSL_use_PrivateKey_File (PEM) --> OK");
1963 ok = 1;
1964 break;
1965 } else {
1966 tls_show_errors(MSG_DEBUG, __func__,
1967 "SSL_use_PrivateKey_File (PEM) "
1968 "failed");
1969 }
1970 #else /* OPENSSL_NO_STDIO */
1971 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
1972 __func__);
1973 #endif /* OPENSSL_NO_STDIO */
1974
1975 if (tls_read_pkcs12(ssl_ctx, conn->ssl, private_key, passwd)
1976 == 0) {
1977 wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file "
1978 "--> OK");
1979 ok = 1;
1980 break;
1981 }
1982
1983 if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) {
1984 wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to "
1985 "access certificate store --> OK");
1986 ok = 1;
1987 break;
1988 }
1989
1990 break;
1991 }
1992
1993 if (!ok) {
1994 wpa_printf(MSG_INFO, "OpenSSL: Failed to load private key");
1995 os_free(passwd);
1996 ERR_clear_error();
1997 return -1;
1998 }
1999 ERR_clear_error();
2000 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
2001 os_free(passwd);
2002
2003 if (!SSL_check_private_key(conn->ssl)) {
2004 tls_show_errors(MSG_INFO, __func__, "Private key failed "
2005 "verification");
2006 return -1;
2007 }
2008
2009 wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully");
2010 return 0;
2011 }
2012
2013
2014 static int tls_global_private_key(SSL_CTX *ssl_ctx, const char *private_key,
2015 const char *private_key_passwd)
2016 {
2017 char *passwd;
2018
2019 if (private_key == NULL)
2020 return 0;
2021
2022 if (private_key_passwd) {
2023 passwd = os_strdup(private_key_passwd);
2024 if (passwd == NULL)
2025 return -1;
2026 } else
2027 passwd = NULL;
2028
2029 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
2030 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
2031 if (
2032 #ifndef OPENSSL_NO_STDIO
2033 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
2034 SSL_FILETYPE_ASN1) != 1 &&
2035 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
2036 SSL_FILETYPE_PEM) != 1 &&
2037 #endif /* OPENSSL_NO_STDIO */
2038 tls_read_pkcs12(ssl_ctx, NULL, private_key, passwd)) {
2039 tls_show_errors(MSG_INFO, __func__,
2040 "Failed to load private key");
2041 os_free(passwd);
2042 ERR_clear_error();
2043 return -1;
2044 }
2045 os_free(passwd);
2046 ERR_clear_error();
2047 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
2048
2049 if (!SSL_CTX_check_private_key(ssl_ctx)) {
2050 tls_show_errors(MSG_INFO, __func__,
2051 "Private key failed verification");
2052 return -1;
2053 }
2054
2055 return 0;
2056 }
2057
2058
2059 static int tls_connection_dh(struct tls_connection *conn, const char *dh_file)
2060 {
2061 #ifdef OPENSSL_NO_DH
2062 if (dh_file == NULL)
2063 return 0;
2064 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
2065 "dh_file specified");
2066 return -1;
2067 #else /* OPENSSL_NO_DH */
2068 DH *dh;
2069 BIO *bio;
2070
2071 /* TODO: add support for dh_blob */
2072 if (dh_file == NULL)
2073 return 0;
2074 if (conn == NULL)
2075 return -1;
2076
2077 bio = BIO_new_file(dh_file, "r");
2078 if (bio == NULL) {
2079 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
2080 dh_file, ERR_error_string(ERR_get_error(), NULL));
2081 return -1;
2082 }
2083 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
2084 BIO_free(bio);
2085 #ifndef OPENSSL_NO_DSA
2086 while (dh == NULL) {
2087 DSA *dsa;
2088 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
2089 " trying to parse as DSA params", dh_file,
2090 ERR_error_string(ERR_get_error(), NULL));
2091 bio = BIO_new_file(dh_file, "r");
2092 if (bio == NULL)
2093 break;
2094 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
2095 BIO_free(bio);
2096 if (!dsa) {
2097 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
2098 "'%s': %s", dh_file,
2099 ERR_error_string(ERR_get_error(), NULL));
2100 break;
2101 }
2102
2103 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
2104 dh = DSA_dup_DH(dsa);
2105 DSA_free(dsa);
2106 if (dh == NULL) {
2107 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
2108 "params into DH params");
2109 break;
2110 }
2111 break;
2112 }
2113 #endif /* !OPENSSL_NO_DSA */
2114 if (dh == NULL) {
2115 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
2116 "'%s'", dh_file);
2117 return -1;
2118 }
2119
2120 if (SSL_set_tmp_dh(conn->ssl, dh) != 1) {
2121 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
2122 "%s", dh_file,
2123 ERR_error_string(ERR_get_error(), NULL));
2124 DH_free(dh);
2125 return -1;
2126 }
2127 DH_free(dh);
2128 return 0;
2129 #endif /* OPENSSL_NO_DH */
2130 }
2131
2132
2133 static int tls_global_dh(SSL_CTX *ssl_ctx, const char *dh_file)
2134 {
2135 #ifdef OPENSSL_NO_DH
2136 if (dh_file == NULL)
2137 return 0;
2138 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
2139 "dh_file specified");
2140 return -1;
2141 #else /* OPENSSL_NO_DH */
2142 DH *dh;
2143 BIO *bio;
2144
2145 /* TODO: add support for dh_blob */
2146 if (dh_file == NULL)
2147 return 0;
2148 if (ssl_ctx == NULL)
2149 return -1;
2150
2151 bio = BIO_new_file(dh_file, "r");
2152 if (bio == NULL) {
2153 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
2154 dh_file, ERR_error_string(ERR_get_error(), NULL));
2155 return -1;
2156 }
2157 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
2158 BIO_free(bio);
2159 #ifndef OPENSSL_NO_DSA
2160 while (dh == NULL) {
2161 DSA *dsa;
2162 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
2163 " trying to parse as DSA params", dh_file,
2164 ERR_error_string(ERR_get_error(), NULL));
2165 bio = BIO_new_file(dh_file, "r");
2166 if (bio == NULL)
2167 break;
2168 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
2169 BIO_free(bio);
2170 if (!dsa) {
2171 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
2172 "'%s': %s", dh_file,
2173 ERR_error_string(ERR_get_error(), NULL));
2174 break;
2175 }
2176
2177 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
2178 dh = DSA_dup_DH(dsa);
2179 DSA_free(dsa);
2180 if (dh == NULL) {
2181 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
2182 "params into DH params");
2183 break;
2184 }
2185 break;
2186 }
2187 #endif /* !OPENSSL_NO_DSA */
2188 if (dh == NULL) {
2189 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
2190 "'%s'", dh_file);
2191 return -1;
2192 }
2193
2194 if (SSL_CTX_set_tmp_dh(ssl_ctx, dh) != 1) {
2195 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
2196 "%s", dh_file,
2197 ERR_error_string(ERR_get_error(), NULL));
2198 DH_free(dh);
2199 return -1;
2200 }
2201 DH_free(dh);
2202 return 0;
2203 #endif /* OPENSSL_NO_DH */
2204 }
2205
2206
2207 int tls_connection_get_keys(void *ssl_ctx, struct tls_connection *conn,
2208 struct tls_keys *keys)
2209 {
2210 SSL *ssl;
2211
2212 if (conn == NULL || keys == NULL)
2213 return -1;
2214 ssl = conn->ssl;
2215 if (ssl == NULL || ssl->s3 == NULL || ssl->session == NULL)
2216 return -1;
2217
2218 os_memset(keys, 0, sizeof(*keys));
2219 keys->master_key = ssl->session->master_key;
2220 keys->master_key_len = ssl->session->master_key_length;
2221 keys->client_random = ssl->s3->client_random;
2222 keys->client_random_len = SSL3_RANDOM_SIZE;
2223 keys->server_random = ssl->s3->server_random;
2224 keys->server_random_len = SSL3_RANDOM_SIZE;
2225
2226 return 0;
2227 }
2228
2229
2230 int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
2231 const char *label, int server_random_first,
2232 u8 *out, size_t out_len)
2233 {
2234 return -1;
2235 }
2236
2237
2238 static struct wpabuf *
2239 openssl_handshake(struct tls_connection *conn, const struct wpabuf *in_data,
2240 int server)
2241 {
2242 int res;
2243 struct wpabuf *out_data;
2244
2245 /*
2246 * Give TLS handshake data from the server (if available) to OpenSSL
2247 * for processing.
2248 */
2249 if (in_data &&
2250 BIO_write(conn->ssl_in, wpabuf_head(in_data), wpabuf_len(in_data))
2251 < 0) {
2252 tls_show_errors(MSG_INFO, __func__,
2253 "Handshake failed - BIO_write");
2254 return NULL;
2255 }
2256
2257 /* Initiate TLS handshake or continue the existing handshake */
2258 if (server)
2259 res = SSL_accept(conn->ssl);
2260 else
2261 res = SSL_connect(conn->ssl);
2262 if (res != 1) {
2263 int err = SSL_get_error(conn->ssl, res);
2264 if (err == SSL_ERROR_WANT_READ)
2265 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want "
2266 "more data");
2267 else if (err == SSL_ERROR_WANT_WRITE)
2268 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to "
2269 "write");
2270 else {
2271 tls_show_errors(MSG_INFO, __func__, "SSL_connect");
2272 conn->failed++;
2273 }
2274 }
2275
2276 /* Get the TLS handshake data to be sent to the server */
2277 res = BIO_ctrl_pending(conn->ssl_out);
2278 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
2279 out_data = wpabuf_alloc(res);
2280 if (out_data == NULL) {
2281 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
2282 "handshake output (%d bytes)", res);
2283 if (BIO_reset(conn->ssl_out) < 0) {
2284 tls_show_errors(MSG_INFO, __func__,
2285 "BIO_reset failed");
2286 }
2287 return NULL;
2288 }
2289 res = res == 0 ? 0 : BIO_read(conn->ssl_out, wpabuf_mhead(out_data),
2290 res);
2291 if (res < 0) {
2292 tls_show_errors(MSG_INFO, __func__,
2293 "Handshake failed - BIO_read");
2294 if (BIO_reset(conn->ssl_out) < 0) {
2295 tls_show_errors(MSG_INFO, __func__,
2296 "BIO_reset failed");
2297 }
2298 wpabuf_free(out_data);
2299 return NULL;
2300 }
2301 wpabuf_put(out_data, res);
2302
2303 return out_data;
2304 }
2305
2306
2307 static struct wpabuf *
2308 openssl_get_appl_data(struct tls_connection *conn, size_t max_len)
2309 {
2310 struct wpabuf *appl_data;
2311 int res;
2312
2313 appl_data = wpabuf_alloc(max_len + 100);
2314 if (appl_data == NULL)
2315 return NULL;
2316
2317 res = SSL_read(conn->ssl, wpabuf_mhead(appl_data),
2318 wpabuf_size(appl_data));
2319 if (res < 0) {
2320 int err = SSL_get_error(conn->ssl, res);
2321 if (err == SSL_ERROR_WANT_READ ||
2322 err == SSL_ERROR_WANT_WRITE) {
2323 wpa_printf(MSG_DEBUG, "SSL: No Application Data "
2324 "included");
2325 } else {
2326 tls_show_errors(MSG_INFO, __func__,
2327 "Failed to read possible "
2328 "Application Data");
2329 }
2330 wpabuf_free(appl_data);
2331 return NULL;
2332 }
2333
2334 wpabuf_put(appl_data, res);
2335 wpa_hexdump_buf_key(MSG_MSGDUMP, "SSL: Application Data in Finished "
2336 "message", appl_data);
2337
2338 return appl_data;
2339 }
2340
2341
2342 static struct wpabuf *
2343 openssl_connection_handshake(struct tls_connection *conn,
2344 const struct wpabuf *in_data,
2345 struct wpabuf **appl_data, int server)
2346 {
2347 struct wpabuf *out_data;
2348
2349 if (appl_data)
2350 *appl_data = NULL;
2351
2352 out_data = openssl_handshake(conn, in_data, server);
2353 if (out_data == NULL)
2354 return NULL;
2355
2356 if (SSL_is_init_finished(conn->ssl) && appl_data && in_data)
2357 *appl_data = openssl_get_appl_data(conn, wpabuf_len(in_data));
2358
2359 return out_data;
2360 }
2361
2362
2363 struct wpabuf *
2364 tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn,
2365 const struct wpabuf *in_data,
2366 struct wpabuf **appl_data)
2367 {
2368 return openssl_connection_handshake(conn, in_data, appl_data, 0);
2369 }
2370
2371
2372 struct wpabuf * tls_connection_server_handshake(void *tls_ctx,
2373 struct tls_connection *conn,
2374 const struct wpabuf *in_data,
2375 struct wpabuf **appl_data)
2376 {
2377 return openssl_connection_handshake(conn, in_data, appl_data, 1);
2378 }
2379
2380
2381 struct wpabuf * tls_connection_encrypt(void *tls_ctx,
2382 struct tls_connection *conn,
2383 const struct wpabuf *in_data)
2384 {
2385 int res;
2386 struct wpabuf *buf;
2387
2388 if (conn == NULL)
2389 return NULL;
2390
2391 /* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */
2392 if ((res = BIO_reset(conn->ssl_in)) < 0 ||
2393 (res = BIO_reset(conn->ssl_out)) < 0) {
2394 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
2395 return NULL;
2396 }
2397 res = SSL_write(conn->ssl, wpabuf_head(in_data), wpabuf_len(in_data));
2398 if (res < 0) {
2399 tls_show_errors(MSG_INFO, __func__,
2400 "Encryption failed - SSL_write");
2401 return NULL;
2402 }
2403
2404 /* Read encrypted data to be sent to the server */
2405 buf = wpabuf_alloc(wpabuf_len(in_data) + 300);
2406 if (buf == NULL)
2407 return NULL;
2408 res = BIO_read(conn->ssl_out, wpabuf_mhead(buf), wpabuf_size(buf));
2409 if (res < 0) {
2410 tls_show_errors(MSG_INFO, __func__,
2411 "Encryption failed - BIO_read");
2412 wpabuf_free(buf);
2413 return NULL;
2414 }
2415 wpabuf_put(buf, res);
2416
2417 return buf;
2418 }
2419
2420
2421 struct wpabuf * tls_connection_decrypt(void *tls_ctx,
2422 struct tls_connection *conn,
2423 const struct wpabuf *in_data)
2424 {
2425 int res;
2426 struct wpabuf *buf;
2427
2428 /* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */
2429 res = BIO_write(conn->ssl_in, wpabuf_head(in_data),
2430 wpabuf_len(in_data));
2431 if (res < 0) {
2432 tls_show_errors(MSG_INFO, __func__,
2433 "Decryption failed - BIO_write");
2434 return NULL;
2435 }
2436 if (BIO_reset(conn->ssl_out) < 0) {
2437 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
2438 return NULL;
2439 }
2440
2441 /* Read decrypted data for further processing */
2442 /*
2443 * Even though we try to disable TLS compression, it is possible that
2444 * this cannot be done with all TLS libraries. Add extra buffer space
2445 * to handle the possibility of the decrypted data being longer than
2446 * input data.
2447 */
2448 buf = wpabuf_alloc((wpabuf_len(in_data) + 500) * 3);
2449 if (buf == NULL)
2450 return NULL;
2451 res = SSL_read(conn->ssl, wpabuf_mhead(buf), wpabuf_size(buf));
2452 if (res < 0) {
2453 tls_show_errors(MSG_INFO, __func__,
2454 "Decryption failed - SSL_read");
2455 wpabuf_free(buf);
2456 return NULL;
2457 }
2458 wpabuf_put(buf, res);
2459
2460 return buf;
2461 }
2462
2463
2464 int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn)
2465 {
2466 return conn ? conn->ssl->hit : 0;
2467 }
2468
2469
2470 int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
2471 u8 *ciphers)
2472 {
2473 char buf[100], *pos, *end;
2474 u8 *c;
2475 int ret;
2476
2477 if (conn == NULL || conn->ssl == NULL || ciphers == NULL)
2478 return -1;
2479
2480 buf[0] = '\0';
2481 pos = buf;
2482 end = pos + sizeof(buf);
2483
2484 c = ciphers;
2485 while (*c != TLS_CIPHER_NONE) {
2486 const char *suite;
2487
2488 switch (*c) {
2489 case TLS_CIPHER_RC4_SHA:
2490 suite = "RC4-SHA";
2491 break;
2492 case TLS_CIPHER_AES128_SHA:
2493 suite = "AES128-SHA";
2494 break;
2495 case TLS_CIPHER_RSA_DHE_AES128_SHA:
2496 suite = "DHE-RSA-AES128-SHA";
2497 break;
2498 case TLS_CIPHER_ANON_DH_AES128_SHA:
2499 suite = "ADH-AES128-SHA";
2500 break;
2501 default:
2502 wpa_printf(MSG_DEBUG, "TLS: Unsupported "
2503 "cipher selection: %d", *c);
2504 return -1;
2505 }
2506 ret = os_snprintf(pos, end - pos, ":%s", suite);
2507 if (ret < 0 || ret >= end - pos)
2508 break;
2509 pos += ret;
2510
2511 c++;
2512 }
2513
2514 wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1);
2515
2516 if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) {
2517 tls_show_errors(MSG_INFO, __func__,
2518 "Cipher suite configuration failed");
2519 return -1;
2520 }
2521
2522 return 0;
2523 }
2524
2525
2526 int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn,
2527 char *buf, size_t buflen)
2528 {
2529 const char *name;
2530 if (conn == NULL || conn->ssl == NULL)
2531 return -1;
2532
2533 name = SSL_get_cipher(conn->ssl);
2534 if (name == NULL)
2535 return -1;
2536
2537 os_strlcpy(buf, name, buflen);
2538 return 0;
2539 }
2540
2541
2542 int tls_connection_enable_workaround(void *ssl_ctx,
2543 struct tls_connection *conn)
2544 {
2545 SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
2546
2547 return 0;
2548 }
2549
2550
2551 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
2552 /* ClientHello TLS extensions require a patch to openssl, so this function is
2553 * commented out unless explicitly needed for EAP-FAST in order to be able to
2554 * build this file with unmodified openssl. */
2555 int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn,
2556 int ext_type, const u8 *data,
2557 size_t data_len)
2558 {
2559 if (conn == NULL || conn->ssl == NULL || ext_type != 35)
2560 return -1;
2561
2562 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE
2563 if (SSL_set_session_ticket_ext(conn->ssl, (void *) data,
2564 data_len) != 1)
2565 return -1;
2566 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */
2567 if (SSL_set_hello_extension(conn->ssl, ext_type, (void *) data,
2568 data_len) != 1)
2569 return -1;
2570 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */
2571
2572 return 0;
2573 }
2574 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
2575
2576
2577 int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn)
2578 {
2579 if (conn == NULL)
2580 return -1;
2581 return conn->failed;
2582 }
2583
2584
2585 int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn)
2586 {
2587 if (conn == NULL)
2588 return -1;
2589 return conn->read_alerts;
2590 }
2591
2592
2593 int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn)
2594 {
2595 if (conn == NULL)
2596 return -1;
2597 return conn->write_alerts;
2598 }
2599
2600
2601 int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
2602 const struct tls_connection_params *params)
2603 {
2604 int ret;
2605 unsigned long err;
2606
2607 if (conn == NULL)
2608 return -1;
2609
2610 while ((err = ERR_get_error())) {
2611 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
2612 __func__, ERR_error_string(err, NULL));
2613 }
2614
2615 if (params->engine) {
2616 wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine");
2617 ret = tls_engine_init(conn, params->engine_id, params->pin,
2618 params->key_id, params->cert_id,
2619 params->ca_cert_id);
2620 if (ret)
2621 return ret;
2622 }
2623 if (tls_connection_set_subject_match(conn,
2624 params->subject_match,
2625 params->altsubject_match))
2626 return -1;
2627
2628 if (params->engine && params->ca_cert_id) {
2629 if (tls_connection_engine_ca_cert(tls_ctx, conn,
2630 params->ca_cert_id))
2631 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
2632 } else if (tls_connection_ca_cert(tls_ctx, conn, params->ca_cert,
2633 params->ca_cert_blob,
2634 params->ca_cert_blob_len,
2635 params->ca_path))
2636 return -1;
2637
2638 if (params->engine && params->cert_id) {
2639 if (tls_connection_engine_client_cert(conn, params->cert_id))
2640 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
2641 } else if (tls_connection_client_cert(conn, params->client_cert,
2642 params->client_cert_blob,
2643 params->client_cert_blob_len))
2644 return -1;
2645
2646 if (params->engine && params->key_id) {
2647 wpa_printf(MSG_DEBUG, "TLS: Using private key from engine");
2648 if (tls_connection_engine_private_key(conn))
2649 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
2650 } else if (tls_connection_private_key(tls_ctx, conn,
2651 params->private_key,
2652 params->private_key_passwd,
2653 params->private_key_blob,
2654 params->private_key_blob_len)) {
2655 wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'",
2656 params->private_key);
2657 return -1;
2658 }
2659
2660 if (tls_connection_dh(conn, params->dh_file)) {
2661 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
2662 params->dh_file);
2663 return -1;
2664 }
2665
2666 tls_get_errors(tls_ctx);
2667
2668 return 0;
2669 }
2670
2671
2672 int tls_global_set_params(void *tls_ctx,
2673 const struct tls_connection_params *params)
2674 {
2675 SSL_CTX *ssl_ctx = tls_ctx;
2676 unsigned long err;
2677
2678 while ((err = ERR_get_error())) {
2679 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
2680 __func__, ERR_error_string(err, NULL));
2681 }
2682
2683 if (tls_global_ca_cert(ssl_ctx, params->ca_cert))
2684 return -1;
2685
2686 if (tls_global_client_cert(ssl_ctx, params->client_cert))
2687 return -1;
2688
2689 if (tls_global_private_key(ssl_ctx, params->private_key,
2690 params->private_key_passwd))
2691 return -1;
2692
2693 if (tls_global_dh(ssl_ctx, params->dh_file)) {
2694 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
2695 params->dh_file);
2696 return -1;
2697 }
2698
2699 return 0;
2700 }
2701
2702
2703 int tls_connection_get_keyblock_size(void *tls_ctx,
2704 struct tls_connection *conn)
2705 {
2706 const EVP_CIPHER *c;
2707 const EVP_MD *h;
2708
2709 if (conn == NULL || conn->ssl == NULL ||
2710 conn->ssl->enc_read_ctx == NULL ||
2711 conn->ssl->enc_read_ctx->cipher == NULL ||
2712 conn->ssl->read_hash == NULL)
2713 return -1;
2714
2715 c = conn->ssl->enc_read_ctx->cipher;
2716 #if OPENSSL_VERSION_NUMBER >= 0x00909000L
2717 h = EVP_MD_CTX_md(conn->ssl->read_hash);
2718 #else
2719 h = conn->ssl->read_hash;
2720 #endif
2721
2722 return 2 * (EVP_CIPHER_key_length(c) +
2723 EVP_MD_size(h) +
2724 EVP_CIPHER_iv_length(c));
2725 }
2726
2727
2728 unsigned int tls_capabilities(void *tls_ctx)
2729 {
2730 return 0;
2731 }
2732
2733
2734 int tls_connection_set_ia(void *tls_ctx, struct tls_connection *conn,
2735 int tls_ia)
2736 {
2737 return -1;
2738 }
2739
2740
2741 struct wpabuf * tls_connection_ia_send_phase_finished(
2742 void *tls_ctx, struct tls_connection *conn, int final)
2743 {
2744 return NULL;
2745 }
2746
2747
2748 int tls_connection_ia_final_phase_finished(void *tls_ctx,
2749 struct tls_connection *conn)
2750 {
2751 return -1;
2752 }
2753
2754
2755 int tls_connection_ia_permute_inner_secret(void *tls_ctx,
2756 struct tls_connection *conn,
2757 const u8 *key, size_t key_len)
2758 {
2759 return -1;
2760 }
2761
2762
2763 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
2764 /* Pre-shared secred requires a patch to openssl, so this function is
2765 * commented out unless explicitly needed for EAP-FAST in order to be able to
2766 * build this file with unmodified openssl. */
2767
2768 static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
2769 STACK_OF(SSL_CIPHER) *peer_ciphers,
2770 SSL_CIPHER **cipher, void *arg)
2771 {
2772 struct tls_connection *conn = arg;
2773 int ret;
2774
2775 if (conn == NULL || conn->session_ticket_cb == NULL)
2776 return 0;
2777
2778 ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx,
2779 conn->session_ticket,
2780 conn->session_ticket_len,
2781 s->s3->client_random,
2782 s->s3->server_random, secret);
2783 os_free(conn->session_ticket);
2784 conn->session_ticket = NULL;
2785
2786 if (ret <= 0)
2787 return 0;
2788
2789 *secret_len = SSL_MAX_MASTER_KEY_LENGTH;
2790 return 1;
2791 }
2792
2793
2794 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE
2795 static int tls_session_ticket_ext_cb(SSL *s, const unsigned char *data,
2796 int len, void *arg)
2797 {
2798 struct tls_connection *conn = arg;
2799
2800 if (conn == NULL || conn->session_ticket_cb == NULL)
2801 return 0;
2802
2803 wpa_printf(MSG_DEBUG, "OpenSSL: %s: length=%d", __func__, len);
2804
2805 os_free(conn->session_ticket);
2806 conn->session_ticket = NULL;
2807
2808 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
2809 "extension", data, len);
2810
2811 conn->session_ticket = os_malloc(len);
2812 if (conn->session_ticket == NULL)
2813 return 0;
2814
2815 os_memcpy(conn->session_ticket, data, len);
2816 conn->session_ticket_len = len;
2817
2818 return 1;
2819 }
2820 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */
2821 #ifdef SSL_OP_NO_TICKET
2822 static void tls_hello_ext_cb(SSL *s, int client_server, int type,
2823 unsigned char *data, int len, void *arg)
2824 {
2825 struct tls_connection *conn = arg;
2826
2827 if (conn == NULL || conn->session_ticket_cb == NULL)
2828 return;
2829
2830 wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__,
2831 type, len);
2832
2833 if (type == TLSEXT_TYPE_session_ticket && !client_server) {
2834 os_free(conn->session_ticket);
2835 conn->session_ticket = NULL;
2836
2837 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
2838 "extension", data, len);
2839 conn->session_ticket = os_malloc(len);
2840 if (conn->session_ticket == NULL)
2841 return;
2842
2843 os_memcpy(conn->session_ticket, data, len);
2844 conn->session_ticket_len = len;
2845 }
2846 }
2847 #else /* SSL_OP_NO_TICKET */
2848 static int tls_hello_ext_cb(SSL *s, TLS_EXTENSION *ext, void *arg)
2849 {
2850 struct tls_connection *conn = arg;
2851
2852 if (conn == NULL || conn->session_ticket_cb == NULL)
2853 return 0;
2854
2855 wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__,
2856 ext->type, ext->length);
2857
2858 os_free(conn->session_ticket);
2859 conn->session_ticket = NULL;
2860
2861 if (ext->type == 35) {
2862 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
2863 "extension", ext->data, ext->length);
2864 conn->session_ticket = os_malloc(ext->length);
2865 if (conn->session_ticket == NULL)
2866 return SSL_AD_INTERNAL_ERROR;
2867
2868 os_memcpy(conn->session_ticket, ext->data, ext->length);
2869 conn->session_ticket_len = ext->length;
2870 }
2871
2872 return 0;
2873 }
2874 #endif /* SSL_OP_NO_TICKET */
2875 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */
2876 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
2877
2878
2879 int tls_connection_set_session_ticket_cb(void *tls_ctx,
2880 struct tls_connection *conn,
2881 tls_session_ticket_cb cb,
2882 void *ctx)
2883 {
2884 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
2885 conn->session_ticket_cb = cb;
2886 conn->session_ticket_cb_ctx = ctx;
2887
2888 if (cb) {
2889 if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb,
2890 conn) != 1)
2891 return -1;
2892 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE
2893 SSL_set_session_ticket_ext_cb(conn->ssl,
2894 tls_session_ticket_ext_cb, conn);
2895 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */
2896 #ifdef SSL_OP_NO_TICKET
2897 SSL_set_tlsext_debug_callback(conn->ssl, tls_hello_ext_cb);
2898 SSL_set_tlsext_debug_arg(conn->ssl, conn);
2899 #else /* SSL_OP_NO_TICKET */
2900 if (SSL_set_hello_extension_cb(conn->ssl, tls_hello_ext_cb,
2901 conn) != 1)
2902 return -1;
2903 #endif /* SSL_OP_NO_TICKET */
2904 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */
2905 } else {
2906 if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1)
2907 return -1;
2908 #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE
2909 SSL_set_session_ticket_ext_cb(conn->ssl, NULL, NULL);
2910 #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */
2911 #ifdef SSL_OP_NO_TICKET
2912 SSL_set_tlsext_debug_callback(conn->ssl, NULL);
2913 SSL_set_tlsext_debug_arg(conn->ssl, conn);
2914 #else /* SSL_OP_NO_TICKET */
2915 if (SSL_set_hello_extension_cb(conn->ssl, NULL, NULL) != 1)
2916 return -1;
2917 #endif /* SSL_OP_NO_TICKET */
2918 #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */
2919 }
2920
2921 return 0;
2922 #else /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
2923 return -1;
2924 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
2925 }
Mirror of AROS' svn.