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math.3: Mention f{max,min,dim}.
[dragonfly.git] / contrib / hostapd-0.5.8 / tls_openssl.c
blobc8d941f7a113636f8ee37c3df6823317f51bd049
1 /*
2 * WPA Supplicant / SSL/TLS interface functions for openssl
3 * Copyright (c) 2004-2006, 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 "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
40 static int tls_openssl_ref_count = 0;
41
42 struct tls_connection {
43 SSL *ssl;
44 BIO *ssl_in, *ssl_out;
45 #ifndef OPENSSL_NO_ENGINE
46 ENGINE *engine; /* functional reference to the engine */
47 EVP_PKEY *private_key; /* the private key if using engine */
48 #endif /* OPENSSL_NO_ENGINE */
49 char *subject_match, *altsubject_match;
50 int read_alerts, write_alerts, failed;
51
52 u8 *pre_shared_secret;
53 size_t pre_shared_secret_len;
54 };
55
56
57 #ifdef CONFIG_NO_STDOUT_DEBUG
58
59 static void _tls_show_errors(void)
60 {
61 unsigned long err;
62
63 while ((err = ERR_get_error())) {
64 /* Just ignore the errors, since stdout is disabled */
65 }
66 }
67 #define tls_show_errors(l, f, t) _tls_show_errors()
68
69 #else /* CONFIG_NO_STDOUT_DEBUG */
70
71 static void tls_show_errors(int level, const char *func, const char *txt)
72 {
73 unsigned long err;
74
75 wpa_printf(level, "OpenSSL: %s - %s %s",
76 func, txt, ERR_error_string(ERR_get_error(), NULL));
77
78 while ((err = ERR_get_error())) {
79 wpa_printf(MSG_INFO, "OpenSSL: pending error: %s",
80 ERR_error_string(err, NULL));
81 }
82 }
83
84 #endif /* CONFIG_NO_STDOUT_DEBUG */
85
86
87 #ifdef CONFIG_NATIVE_WINDOWS
88
89 /* Windows CryptoAPI and access to certificate stores */
90 #include <wincrypt.h>
91
92 #ifdef __MINGW32_VERSION
93 /*
94 * MinGW does not yet include all the needed definitions for CryptoAPI, so
95 * define here whatever extra is needed.
96 */
97 #define CALG_SSL3_SHAMD5 (ALG_CLASS_HASH | ALG_TYPE_ANY | ALG_SID_SSL3SHAMD5)
98 #define CERT_SYSTEM_STORE_CURRENT_USER (1 << 16)
99 #define CERT_STORE_READONLY_FLAG 0x00008000
100 #define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000
101 #define CRYPT_ACQUIRE_COMPARE_KEY_FLAG 0x00000004
102
103 static BOOL WINAPI
104 (*CryptAcquireCertificatePrivateKey)(PCCERT_CONTEXT pCert, DWORD dwFlags,
105 void *pvReserved, HCRYPTPROV *phCryptProv,
106 DWORD *pdwKeySpec, BOOL *pfCallerFreeProv)
107 = NULL; /* to be loaded from crypt32.dll */
108
109 static PCCERT_CONTEXT WINAPI
110 (*CertEnumCertificatesInStore)(HCERTSTORE hCertStore,
111 PCCERT_CONTEXT pPrevCertContext)
112 = NULL; /* to be loaded from crypt32.dll */
113
114 static int mingw_load_crypto_func(void)
115 {
116 HINSTANCE dll;
117
118 /* MinGW does not yet have full CryptoAPI support, so load the needed
119 * function here. */
120
121 if (CryptAcquireCertificatePrivateKey)
122 return 0;
123
124 dll = LoadLibrary("crypt32");
125 if (dll == NULL) {
126 wpa_printf(MSG_DEBUG, "CryptoAPI: Could not load crypt32 "
127 "library");
128 return -1;
129 }
130
131 CryptAcquireCertificatePrivateKey = GetProcAddress(
132 dll, "CryptAcquireCertificatePrivateKey");
133 if (CryptAcquireCertificatePrivateKey == NULL) {
134 wpa_printf(MSG_DEBUG, "CryptoAPI: Could not get "
135 "CryptAcquireCertificatePrivateKey() address from "
136 "crypt32 library");
137 return -1;
138 }
139
140 CertEnumCertificatesInStore = (void *) GetProcAddress(
141 dll, "CertEnumCertificatesInStore");
142 if (CertEnumCertificatesInStore == NULL) {
143 wpa_printf(MSG_DEBUG, "CryptoAPI: Could not get "
144 "CertEnumCertificatesInStore() address from "
145 "crypt32 library");
146 return -1;
147 }
148
149 return 0;
150 }
151
152 #else /* __MINGW32_VERSION */
153
154 static int mingw_load_crypto_func(void)
155 {
156 return 0;
157 }
158
159 #endif /* __MINGW32_VERSION */
160
161
162 struct cryptoapi_rsa_data {
163 const CERT_CONTEXT *cert;
164 HCRYPTPROV crypt_prov;
165 DWORD key_spec;
166 BOOL free_crypt_prov;
167 };
168
169
170 static void cryptoapi_error(const char *msg)
171 {
172 wpa_printf(MSG_INFO, "CryptoAPI: %s; err=%u",
173 msg, (unsigned int) GetLastError());
174 }
175
176
177 static int cryptoapi_rsa_pub_enc(int flen, const unsigned char *from,
178 unsigned char *to, RSA *rsa, int padding)
179 {
180 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
181 return 0;
182 }
183
184
185 static int cryptoapi_rsa_pub_dec(int flen, const unsigned char *from,
186 unsigned char *to, RSA *rsa, int padding)
187 {
188 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
189 return 0;
190 }
191
192
193 static int cryptoapi_rsa_priv_enc(int flen, const unsigned char *from,
194 unsigned char *to, RSA *rsa, int padding)
195 {
196 struct cryptoapi_rsa_data *priv =
197 (struct cryptoapi_rsa_data *) rsa->meth->app_data;
198 HCRYPTHASH hash;
199 DWORD hash_size, len, i;
200 unsigned char *buf = NULL;
201 int ret = 0;
202
203 if (priv == NULL) {
204 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
205 ERR_R_PASSED_NULL_PARAMETER);
206 return 0;
207 }
208
209 if (padding != RSA_PKCS1_PADDING) {
210 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
211 RSA_R_UNKNOWN_PADDING_TYPE);
212 return 0;
213 }
214
215 if (flen != 16 /* MD5 */ + 20 /* SHA-1 */) {
216 wpa_printf(MSG_INFO, "%s - only MD5-SHA1 hash supported",
217 __func__);
218 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
219 RSA_R_INVALID_MESSAGE_LENGTH);
220 return 0;
221 }
222
223 if (!CryptCreateHash(priv->crypt_prov, CALG_SSL3_SHAMD5, 0, 0, &hash))
224 {
225 cryptoapi_error("CryptCreateHash failed");
226 return 0;
227 }
228
229 len = sizeof(hash_size);
230 if (!CryptGetHashParam(hash, HP_HASHSIZE, (BYTE *) &hash_size, &len,
231 0)) {
232 cryptoapi_error("CryptGetHashParam failed");
233 goto err;
234 }
235
236 if ((int) hash_size != flen) {
237 wpa_printf(MSG_INFO, "CryptoAPI: Invalid hash size (%u != %d)",
238 (unsigned) hash_size, flen);
239 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
240 RSA_R_INVALID_MESSAGE_LENGTH);
241 goto err;
242 }
243 if (!CryptSetHashParam(hash, HP_HASHVAL, (BYTE * ) from, 0)) {
244 cryptoapi_error("CryptSetHashParam failed");
245 goto err;
246 }
247
248 len = RSA_size(rsa);
249 buf = os_malloc(len);
250 if (buf == NULL) {
251 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_MALLOC_FAILURE);
252 goto err;
253 }
254
255 if (!CryptSignHash(hash, priv->key_spec, NULL, 0, buf, &len)) {
256 cryptoapi_error("CryptSignHash failed");
257 goto err;
258 }
259
260 for (i = 0; i < len; i++)
261 to[i] = buf[len - i - 1];
262 ret = len;
263
264 err:
265 os_free(buf);
266 CryptDestroyHash(hash);
267
268 return ret;
269 }
270
271
272 static int cryptoapi_rsa_priv_dec(int flen, const unsigned char *from,
273 unsigned char *to, RSA *rsa, int padding)
274 {
275 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
276 return 0;
277 }
278
279
280 static void cryptoapi_free_data(struct cryptoapi_rsa_data *priv)
281 {
282 if (priv == NULL)
283 return;
284 if (priv->crypt_prov && priv->free_crypt_prov)
285 CryptReleaseContext(priv->crypt_prov, 0);
286 if (priv->cert)
287 CertFreeCertificateContext(priv->cert);
288 os_free(priv);
289 }
290
291
292 static int cryptoapi_finish(RSA *rsa)
293 {
294 cryptoapi_free_data((struct cryptoapi_rsa_data *) rsa->meth->app_data);
295 os_free((void *) rsa->meth);
296 rsa->meth = NULL;
297 return 1;
298 }
299
300
301 static const CERT_CONTEXT * cryptoapi_find_cert(const char *name, DWORD store)
302 {
303 HCERTSTORE cs;
304 const CERT_CONTEXT *ret = NULL;
305
306 cs = CertOpenStore((LPCSTR) CERT_STORE_PROV_SYSTEM, 0, 0,
307 store | CERT_STORE_OPEN_EXISTING_FLAG |
308 CERT_STORE_READONLY_FLAG, L"MY");
309 if (cs == NULL) {
310 cryptoapi_error("Failed to open 'My system store'");
311 return NULL;
312 }
313
314 if (strncmp(name, "cert://", 7) == 0) {
315 unsigned short wbuf[255];
316 MultiByteToWideChar(CP_ACP, 0, name + 7, -1, wbuf, 255);
317 ret = CertFindCertificateInStore(cs, X509_ASN_ENCODING |
318 PKCS_7_ASN_ENCODING,
319 0, CERT_FIND_SUBJECT_STR,
320 wbuf, NULL);
321 } else if (strncmp(name, "hash://", 7) == 0) {
322 CRYPT_HASH_BLOB blob;
323 int len;
324 const char *hash = name + 7;
325 unsigned char *buf;
326
327 len = os_strlen(hash) / 2;
328 buf = os_malloc(len);
329 if (buf && hexstr2bin(hash, buf, len) == 0) {
330 blob.cbData = len;
331 blob.pbData = buf;
332 ret = CertFindCertificateInStore(cs,
333 X509_ASN_ENCODING |
334 PKCS_7_ASN_ENCODING,
335 0, CERT_FIND_HASH,
336 &blob, NULL);
337 }
338 os_free(buf);
339 }
340
341 CertCloseStore(cs, 0);
342
343 return ret;
344 }
345
346
347 static int tls_cryptoapi_cert(SSL *ssl, const char *name)
348 {
349 X509 *cert = NULL;
350 RSA *rsa = NULL, *pub_rsa;
351 struct cryptoapi_rsa_data *priv;
352 RSA_METHOD *rsa_meth;
353
354 if (name == NULL ||
355 (strncmp(name, "cert://", 7) != 0 &&
356 strncmp(name, "hash://", 7) != 0))
357 return -1;
358
359 priv = os_zalloc(sizeof(*priv));
360 rsa_meth = os_zalloc(sizeof(*rsa_meth));
361 if (priv == NULL || rsa_meth == NULL) {
362 wpa_printf(MSG_WARNING, "CryptoAPI: Failed to allocate memory "
363 "for CryptoAPI RSA method");
364 os_free(priv);
365 os_free(rsa_meth);
366 return -1;
367 }
368
369 priv->cert = cryptoapi_find_cert(name, CERT_SYSTEM_STORE_CURRENT_USER);
370 if (priv->cert == NULL) {
371 priv->cert = cryptoapi_find_cert(
372 name, CERT_SYSTEM_STORE_LOCAL_MACHINE);
373 }
374 if (priv->cert == NULL) {
375 wpa_printf(MSG_INFO, "CryptoAPI: Could not find certificate "
376 "'%s'", name);
377 goto err;
378 }
379
380 cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &priv->cert->pbCertEncoded,
381 priv->cert->cbCertEncoded);
382 if (cert == NULL) {
383 wpa_printf(MSG_INFO, "CryptoAPI: Could not process X509 DER "
384 "encoding");
385 goto err;
386 }
387
388 if (mingw_load_crypto_func())
389 goto err;
390
391 if (!CryptAcquireCertificatePrivateKey(priv->cert,
392 CRYPT_ACQUIRE_COMPARE_KEY_FLAG,
393 NULL, &priv->crypt_prov,
394 &priv->key_spec,
395 &priv->free_crypt_prov)) {
396 cryptoapi_error("Failed to acquire a private key for the "
397 "certificate");
398 goto err;
399 }
400
401 rsa_meth->name = "Microsoft CryptoAPI RSA Method";
402 rsa_meth->rsa_pub_enc = cryptoapi_rsa_pub_enc;
403 rsa_meth->rsa_pub_dec = cryptoapi_rsa_pub_dec;
404 rsa_meth->rsa_priv_enc = cryptoapi_rsa_priv_enc;
405 rsa_meth->rsa_priv_dec = cryptoapi_rsa_priv_dec;
406 rsa_meth->finish = cryptoapi_finish;
407 rsa_meth->flags = RSA_METHOD_FLAG_NO_CHECK;
408 rsa_meth->app_data = (char *) priv;
409
410 rsa = RSA_new();
411 if (rsa == NULL) {
412 SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE,
413 ERR_R_MALLOC_FAILURE);
414 goto err;
415 }
416
417 if (!SSL_use_certificate(ssl, cert)) {
418 RSA_free(rsa);
419 rsa = NULL;
420 goto err;
421 }
422 pub_rsa = cert->cert_info->key->pkey->pkey.rsa;
423 X509_free(cert);
424 cert = NULL;
425
426 rsa->n = BN_dup(pub_rsa->n);
427 rsa->e = BN_dup(pub_rsa->e);
428 if (!RSA_set_method(rsa, rsa_meth))
429 goto err;
430
431 if (!SSL_use_RSAPrivateKey(ssl, rsa))
432 goto err;
433 RSA_free(rsa);
434
435 return 0;
436
437 err:
438 if (cert)
439 X509_free(cert);
440 if (rsa)
441 RSA_free(rsa);
442 else {
443 os_free(rsa_meth);
444 cryptoapi_free_data(priv);
445 }
446 return -1;
447 }
448
449
450 static int tls_cryptoapi_ca_cert(SSL_CTX *ssl_ctx, SSL *ssl, const char *name)
451 {
452 HCERTSTORE cs;
453 PCCERT_CONTEXT ctx = NULL;
454 X509 *cert;
455 char buf[128];
456 const char *store;
457 #ifdef UNICODE
458 WCHAR *wstore;
459 #endif /* UNICODE */
460
461 if (mingw_load_crypto_func())
462 return -1;
463
464 if (name == NULL || strncmp(name, "cert_store://", 13) != 0)
465 return -1;
466
467 store = name + 13;
468 #ifdef UNICODE
469 wstore = os_malloc((os_strlen(store) + 1) * sizeof(WCHAR));
470 if (wstore == NULL)
471 return -1;
472 wsprintf(wstore, L"%S", store);
473 cs = CertOpenSystemStore(0, wstore);
474 os_free(wstore);
475 #else /* UNICODE */
476 cs = CertOpenSystemStore(0, store);
477 #endif /* UNICODE */
478 if (cs == NULL) {
479 wpa_printf(MSG_DEBUG, "%s: failed to open system cert store "
480 "'%s': error=%d", __func__, store,
481 (int) GetLastError());
482 return -1;
483 }
484
485 while ((ctx = CertEnumCertificatesInStore(cs, ctx))) {
486 cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ctx->pbCertEncoded,
487 ctx->cbCertEncoded);
488 if (cert == NULL) {
489 wpa_printf(MSG_INFO, "CryptoAPI: Could not process "
490 "X509 DER encoding for CA cert");
491 continue;
492 }
493
494 X509_NAME_oneline(X509_get_subject_name(cert), buf,
495 sizeof(buf));
496 wpa_printf(MSG_DEBUG, "OpenSSL: Loaded CA certificate for "
497 "system certificate store: subject='%s'", buf);
498
499 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
500 tls_show_errors(MSG_WARNING, __func__,
501 "Failed to add ca_cert to OpenSSL "
502 "certificate store");
503 }
504
505 X509_free(cert);
506 }
507
508 if (!CertCloseStore(cs, 0)) {
509 wpa_printf(MSG_DEBUG, "%s: failed to close system cert store "
510 "'%s': error=%d", __func__, name + 13,
511 (int) GetLastError());
512 }
513
514 return 0;
515 }
516
517
518 #else /* CONFIG_NATIVE_WINDOWS */
519
520 static int tls_cryptoapi_cert(SSL *ssl, const char *name)
521 {
522 return -1;
523 }
524
525 #endif /* CONFIG_NATIVE_WINDOWS */
526
527
528 static void ssl_info_cb(const SSL *ssl, int where, int ret)
529 {
530 const char *str;
531 int w;
532
533 wpa_printf(MSG_DEBUG, "SSL: (where=0x%x ret=0x%x)", where, ret);
534 w = where & ~SSL_ST_MASK;
535 if (w & SSL_ST_CONNECT)
536 str = "SSL_connect";
537 else if (w & SSL_ST_ACCEPT)
538 str = "SSL_accept";
539 else
540 str = "undefined";
541
542 if (where & SSL_CB_LOOP) {
543 wpa_printf(MSG_DEBUG, "SSL: %s:%s",
544 str, SSL_state_string_long(ssl));
545 } else if (where & SSL_CB_ALERT) {
546 wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s",
547 where & SSL_CB_READ ?
548 "read (remote end reported an error)" :
549 "write (local SSL3 detected an error)",
550 SSL_alert_type_string_long(ret),
551 SSL_alert_desc_string_long(ret));
552 if ((ret >> 8) == SSL3_AL_FATAL) {
553 struct tls_connection *conn =
554 SSL_get_app_data((SSL *) ssl);
555 if (where & SSL_CB_READ)
556 conn->read_alerts++;
557 else
558 conn->write_alerts++;
559 }
560 } else if (where & SSL_CB_EXIT && ret <= 0) {
561 wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s",
562 str, ret == 0 ? "failed" : "error",
563 SSL_state_string_long(ssl));
564 }
565 }
566
567
568 #ifndef OPENSSL_NO_ENGINE
569 /**
570 * tls_engine_load_dynamic_generic - load any openssl engine
571 * @pre: an array of commands and values that load an engine initialized
572 * in the engine specific function
573 * @post: an array of commands and values that initialize an already loaded
574 * engine (or %NULL if not required)
575 * @id: the engine id of the engine to load (only required if post is not %NULL
576 *
577 * This function is a generic function that loads any openssl engine.
578 *
579 * Returns: 0 on success, -1 on failure
580 */
581 static int tls_engine_load_dynamic_generic(const char *pre[],
582 const char *post[], const char *id)
583 {
584 ENGINE *engine;
585 const char *dynamic_id = "dynamic";
586
587 engine = ENGINE_by_id(id);
588 if (engine) {
589 ENGINE_free(engine);
590 wpa_printf(MSG_DEBUG, "ENGINE: engine '%s' is already "
591 "available", id);
592 return 0;
593 }
594 ERR_clear_error();
595
596 engine = ENGINE_by_id(dynamic_id);
597 if (engine == NULL) {
598 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
599 dynamic_id,
600 ERR_error_string(ERR_get_error(), NULL));
601 return -1;
602 }
603
604 /* Perform the pre commands. This will load the engine. */
605 while (pre && pre[0]) {
606 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", pre[0], pre[1]);
607 if (ENGINE_ctrl_cmd_string(engine, pre[0], pre[1], 0) == 0) {
608 wpa_printf(MSG_INFO, "ENGINE: ctrl cmd_string failed: "
609 "%s %s [%s]", pre[0], pre[1],
610 ERR_error_string(ERR_get_error(), NULL));
611 ENGINE_free(engine);
612 return -1;
613 }
614 pre += 2;
615 }
616
617 /*
618 * Free the reference to the "dynamic" engine. The loaded engine can
619 * now be looked up using ENGINE_by_id().
620 */
621 ENGINE_free(engine);
622
623 engine = ENGINE_by_id(id);
624 if (engine == NULL) {
625 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
626 id, ERR_error_string(ERR_get_error(), NULL));
627 return -1;
628 }
629
630 while (post && post[0]) {
631 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", post[0], post[1]);
632 if (ENGINE_ctrl_cmd_string(engine, post[0], post[1], 0) == 0) {
633 wpa_printf(MSG_DEBUG, "ENGINE: ctrl cmd_string failed:"
634 " %s %s [%s]", post[0], post[1],
635 ERR_error_string(ERR_get_error(), NULL));
636 ENGINE_remove(engine);
637 ENGINE_free(engine);
638 return -1;
639 }
640 post += 2;
641 }
642 ENGINE_free(engine);
643
644 return 0;
645 }
646
647
648 /**
649 * tls_engine_load_dynamic_pkcs11 - load the pkcs11 engine provided by opensc
650 * @pkcs11_so_path: pksc11_so_path from the configuration
651 * @pcks11_module_path: pkcs11_module_path from the configuration
652 */
653 static int tls_engine_load_dynamic_pkcs11(const char *pkcs11_so_path,
654 const char *pkcs11_module_path)
655 {
656 char *engine_id = "pkcs11";
657 const char *pre_cmd[] = {
658 "SO_PATH", NULL /* pkcs11_so_path */,
659 "ID", NULL /* engine_id */,
660 "LIST_ADD", "1",
661 /* "NO_VCHECK", "1", */
662 "LOAD", NULL,
663 NULL, NULL
664 };
665 const char *post_cmd[] = {
666 "MODULE_PATH", NULL /* pkcs11_module_path */,
667 NULL, NULL
668 };
669
670 if (!pkcs11_so_path || !pkcs11_module_path)
671 return 0;
672
673 pre_cmd[1] = pkcs11_so_path;
674 pre_cmd[3] = engine_id;
675 post_cmd[1] = pkcs11_module_path;
676
677 wpa_printf(MSG_DEBUG, "ENGINE: Loading pkcs11 Engine from %s",
678 pkcs11_so_path);
679
680 return tls_engine_load_dynamic_generic(pre_cmd, post_cmd, engine_id);
681 }
682
683
684 /**
685 * tls_engine_load_dynamic_opensc - load the opensc engine provided by opensc
686 * @opensc_so_path: opensc_so_path from the configuration
687 */
688 static int tls_engine_load_dynamic_opensc(const char *opensc_so_path)
689 {
690 char *engine_id = "opensc";
691 const char *pre_cmd[] = {
692 "SO_PATH", NULL /* opensc_so_path */,
693 "ID", NULL /* engine_id */,
694 "LIST_ADD", "1",
695 "LOAD", NULL,
696 NULL, NULL
697 };
698
699 if (!opensc_so_path)
700 return 0;
701
702 pre_cmd[1] = opensc_so_path;
703 pre_cmd[3] = engine_id;
704
705 wpa_printf(MSG_DEBUG, "ENGINE: Loading OpenSC Engine from %s",
706 opensc_so_path);
707
708 return tls_engine_load_dynamic_generic(pre_cmd, NULL, engine_id);
709 }
710 #endif /* OPENSSL_NO_ENGINE */
711
712
713 void * tls_init(const struct tls_config *conf)
714 {
715 SSL_CTX *ssl;
716
717 if (tls_openssl_ref_count == 0) {
718 SSL_load_error_strings();
719 SSL_library_init();
720 /* TODO: if /dev/urandom is available, PRNG is seeded
721 * automatically. If this is not the case, random data should
722 * be added here. */
723
724 #ifdef PKCS12_FUNCS
725 PKCS12_PBE_add();
726 #endif /* PKCS12_FUNCS */
727 }
728 tls_openssl_ref_count++;
729
730 ssl = SSL_CTX_new(TLSv1_method());
731 if (ssl == NULL)
732 return NULL;
733
734 SSL_CTX_set_info_callback(ssl, ssl_info_cb);
735
736 #ifndef OPENSSL_NO_ENGINE
737 if (conf &&
738 (conf->opensc_engine_path || conf->pkcs11_engine_path ||
739 conf->pkcs11_module_path)) {
740 wpa_printf(MSG_DEBUG, "ENGINE: Loading dynamic engine");
741 ERR_load_ENGINE_strings();
742 ENGINE_load_dynamic();
743
744 if (tls_engine_load_dynamic_opensc(conf->opensc_engine_path) ||
745 tls_engine_load_dynamic_pkcs11(conf->pkcs11_engine_path,
746 conf->pkcs11_module_path)) {
747 tls_deinit(ssl);
748 return NULL;
749 }
750 }
751 #endif /* OPENSSL_NO_ENGINE */
752
753 return ssl;
754 }
755
756
757 void tls_deinit(void *ssl_ctx)
758 {
759 SSL_CTX *ssl = ssl_ctx;
760 SSL_CTX_free(ssl);
761
762 tls_openssl_ref_count--;
763 if (tls_openssl_ref_count == 0) {
764 #ifndef OPENSSL_NO_ENGINE
765 ENGINE_cleanup();
766 #endif /* OPENSSL_NO_ENGINE */
767 ERR_free_strings();
768 EVP_cleanup();
769 }
770 }
771
772
773 static int tls_engine_init(struct tls_connection *conn, const char *engine_id,
774 const char *pin, const char *key_id)
775 {
776 #ifndef OPENSSL_NO_ENGINE
777 int ret = -1;
778 if (engine_id == NULL) {
779 wpa_printf(MSG_ERROR, "ENGINE: Engine ID not set");
780 return -1;
781 }
782 if (pin == NULL) {
783 wpa_printf(MSG_ERROR, "ENGINE: Smartcard PIN not set");
784 return -1;
785 }
786 if (key_id == NULL) {
787 wpa_printf(MSG_ERROR, "ENGINE: Key Id not set");
788 return -1;
789 }
790
791 ERR_clear_error();
792 conn->engine = ENGINE_by_id(engine_id);
793 if (!conn->engine) {
794 wpa_printf(MSG_ERROR, "ENGINE: engine %s not available [%s]",
795 engine_id, ERR_error_string(ERR_get_error(), NULL));
796 goto err;
797 }
798 if (ENGINE_init(conn->engine) != 1) {
799 wpa_printf(MSG_ERROR, "ENGINE: engine init failed "
800 "(engine: %s) [%s]", engine_id,
801 ERR_error_string(ERR_get_error(), NULL));
802 goto err;
803 }
804 wpa_printf(MSG_DEBUG, "ENGINE: engine initialized");
805
806 if (ENGINE_ctrl_cmd_string(conn->engine, "PIN", pin, 0) == 0) {
807 wpa_printf(MSG_ERROR, "ENGINE: cannot set pin [%s]",
808 ERR_error_string(ERR_get_error(), NULL));
809 goto err;
810 }
811 conn->private_key = ENGINE_load_private_key(conn->engine,
812 key_id, NULL, NULL);
813 if (!conn->private_key) {
814 wpa_printf(MSG_ERROR, "ENGINE: cannot load private key with id"
815 " '%s' [%s]", key_id,
816 ERR_error_string(ERR_get_error(), NULL));
817 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
818 goto err;
819 }
820 return 0;
821
822 err:
823 if (conn->engine) {
824 ENGINE_free(conn->engine);
825 conn->engine = NULL;
826 }
827
828 if (conn->private_key) {
829 EVP_PKEY_free(conn->private_key);
830 conn->private_key = NULL;
831 }
832
833 return ret;
834 #else /* OPENSSL_NO_ENGINE */
835 return 0;
836 #endif /* OPENSSL_NO_ENGINE */
837 }
838
839
840 static void tls_engine_deinit(struct tls_connection *conn)
841 {
842 #ifndef OPENSSL_NO_ENGINE
843 wpa_printf(MSG_DEBUG, "ENGINE: engine deinit");
844 if (conn->private_key) {
845 EVP_PKEY_free(conn->private_key);
846 conn->private_key = NULL;
847 }
848 if (conn->engine) {
849 ENGINE_finish(conn->engine);
850 conn->engine = NULL;
851 }
852 #endif /* OPENSSL_NO_ENGINE */
853 }
854
855
856 int tls_get_errors(void *ssl_ctx)
857 {
858 int count = 0;
859 unsigned long err;
860
861 while ((err = ERR_get_error())) {
862 wpa_printf(MSG_INFO, "TLS - SSL error: %s",
863 ERR_error_string(err, NULL));
864 count++;
865 }
866
867 return count;
868 }
869
870 struct tls_connection * tls_connection_init(void *ssl_ctx)
871 {
872 SSL_CTX *ssl = ssl_ctx;
873 struct tls_connection *conn;
874
875 conn = os_zalloc(sizeof(*conn));
876 if (conn == NULL)
877 return NULL;
878 conn->ssl = SSL_new(ssl);
879 if (conn->ssl == NULL) {
880 tls_show_errors(MSG_INFO, __func__,
881 "Failed to initialize new SSL connection");
882 os_free(conn);
883 return NULL;
884 }
885
886 SSL_set_app_data(conn->ssl, conn);
887 SSL_set_options(conn->ssl,
888 SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 |
889 SSL_OP_SINGLE_DH_USE);
890
891 conn->ssl_in = BIO_new(BIO_s_mem());
892 if (!conn->ssl_in) {
893 tls_show_errors(MSG_INFO, __func__,
894 "Failed to create a new BIO for ssl_in");
895 SSL_free(conn->ssl);
896 os_free(conn);
897 return NULL;
898 }
899
900 conn->ssl_out = BIO_new(BIO_s_mem());
901 if (!conn->ssl_out) {
902 tls_show_errors(MSG_INFO, __func__,
903 "Failed to create a new BIO for ssl_out");
904 SSL_free(conn->ssl);
905 BIO_free(conn->ssl_in);
906 os_free(conn);
907 return NULL;
908 }
909
910 SSL_set_bio(conn->ssl, conn->ssl_in, conn->ssl_out);
911
912 return conn;
913 }
914
915
916 void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn)
917 {
918 if (conn == NULL)
919 return;
920 os_free(conn->pre_shared_secret);
921 SSL_free(conn->ssl);
922 tls_engine_deinit(conn);
923 os_free(conn->subject_match);
924 os_free(conn->altsubject_match);
925 os_free(conn);
926 }
927
928
929 int tls_connection_established(void *ssl_ctx, struct tls_connection *conn)
930 {
931 return conn ? SSL_is_init_finished(conn->ssl) : 0;
932 }
933
934
935 int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn)
936 {
937 if (conn == NULL)
938 return -1;
939
940 /* Shutdown previous TLS connection without notifying the peer
941 * because the connection was already terminated in practice
942 * and "close notify" shutdown alert would confuse AS. */
943 SSL_set_quiet_shutdown(conn->ssl, 1);
944 SSL_shutdown(conn->ssl);
945 return 0;
946 }
947
948
949 static int tls_match_altsubject_component(X509 *cert, int type,
950 const char *value, size_t len)
951 {
952 GENERAL_NAME *gen;
953 void *ext;
954 int i, found = 0;
955
956 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
957
958 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
959 gen = sk_GENERAL_NAME_value(ext, i);
960 if (gen->type != type)
961 continue;
962 if (os_strlen((char *) gen->d.ia5->data) == len &&
963 os_memcmp(value, gen->d.ia5->data, len) == 0)
964 found++;
965 }
966
967 return found;
968 }
969
970
971 static int tls_match_altsubject(X509 *cert, const char *match)
972 {
973 int type;
974 const char *pos, *end;
975 size_t len;
976
977 pos = match;
978 do {
979 if (os_strncmp(pos, "EMAIL:", 6) == 0) {
980 type = GEN_EMAIL;
981 pos += 6;
982 } else if (os_strncmp(pos, "DNS:", 4) == 0) {
983 type = GEN_DNS;
984 pos += 4;
985 } else if (os_strncmp(pos, "URI:", 4) == 0) {
986 type = GEN_URI;
987 pos += 4;
988 } else {
989 wpa_printf(MSG_INFO, "TLS: Invalid altSubjectName "
990 "match '%s'", pos);
991 return 0;
992 }
993 end = os_strchr(pos, ';');
994 while (end) {
995 if (os_strncmp(end + 1, "EMAIL:", 6) == 0 ||
996 os_strncmp(end + 1, "DNS:", 4) == 0 ||
997 os_strncmp(end + 1, "URI:", 4) == 0)
998 break;
999 end = os_strchr(end + 1, ';');
1000 }
1001 if (end)
1002 len = end - pos;
1003 else
1004 len = os_strlen(pos);
1005 if (tls_match_altsubject_component(cert, type, pos, len) > 0)
1006 return 1;
1007 pos = end + 1;
1008 } while (end);
1009
1010 return 0;
1011 }
1012
1013
1014 static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
1015 {
1016 char buf[256];
1017 X509 *err_cert;
1018 int err, depth;
1019 SSL *ssl;
1020 struct tls_connection *conn;
1021 char *match, *altmatch;
1022
1023 err_cert = X509_STORE_CTX_get_current_cert(x509_ctx);
1024 err = X509_STORE_CTX_get_error(x509_ctx);
1025 depth = X509_STORE_CTX_get_error_depth(x509_ctx);
1026 ssl = X509_STORE_CTX_get_ex_data(x509_ctx,
1027 SSL_get_ex_data_X509_STORE_CTX_idx());
1028 X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf));
1029
1030 conn = SSL_get_app_data(ssl);
1031 match = conn ? conn->subject_match : NULL;
1032 altmatch = conn ? conn->altsubject_match : NULL;
1033
1034 if (!preverify_ok) {
1035 wpa_printf(MSG_WARNING, "TLS: Certificate verification failed,"
1036 " error %d (%s) depth %d for '%s'", err,
1037 X509_verify_cert_error_string(err), depth, buf);
1038 } else {
1039 wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - "
1040 "preverify_ok=%d err=%d (%s) depth=%d buf='%s'",
1041 preverify_ok, err,
1042 X509_verify_cert_error_string(err), depth, buf);
1043 if (depth == 0 && match && os_strstr(buf, match) == NULL) {
1044 wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not "
1045 "match with '%s'", buf, match);
1046 preverify_ok = 0;
1047 } else if (depth == 0 && altmatch &&
1048 !tls_match_altsubject(err_cert, altmatch)) {
1049 wpa_printf(MSG_WARNING, "TLS: altSubjectName match "
1050 "'%s' not found", altmatch);
1051 preverify_ok = 0;
1052 }
1053 }
1054
1055 return preverify_ok;
1056 }
1057
1058
1059 #ifndef OPENSSL_NO_STDIO
1060 static int tls_load_ca_der(void *_ssl_ctx, const char *ca_cert)
1061 {
1062 SSL_CTX *ssl_ctx = _ssl_ctx;
1063 X509_LOOKUP *lookup;
1064 int ret = 0;
1065
1066 lookup = X509_STORE_add_lookup(ssl_ctx->cert_store,
1067 X509_LOOKUP_file());
1068 if (lookup == NULL) {
1069 tls_show_errors(MSG_WARNING, __func__,
1070 "Failed add lookup for X509 store");
1071 return -1;
1072 }
1073
1074 if (!X509_LOOKUP_load_file(lookup, ca_cert, X509_FILETYPE_ASN1)) {
1075 unsigned long err = ERR_peek_error();
1076 tls_show_errors(MSG_WARNING, __func__,
1077 "Failed load CA in DER format");
1078 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1079 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1080 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1081 "cert already in hash table error",
1082 __func__);
1083 } else
1084 ret = -1;
1085 }
1086
1087 return ret;
1088 }
1089 #endif /* OPENSSL_NO_STDIO */
1090
1091
1092 static int tls_connection_ca_cert(void *_ssl_ctx, struct tls_connection *conn,
1093 const char *ca_cert, const u8 *ca_cert_blob,
1094 size_t ca_cert_blob_len, const char *ca_path)
1095 {
1096 SSL_CTX *ssl_ctx = _ssl_ctx;
1097
1098 if (ca_cert_blob) {
1099 X509 *cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ca_cert_blob,
1100 ca_cert_blob_len);
1101 if (cert == NULL) {
1102 tls_show_errors(MSG_WARNING, __func__,
1103 "Failed to parse ca_cert_blob");
1104 return -1;
1105 }
1106
1107 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
1108 unsigned long err = ERR_peek_error();
1109 tls_show_errors(MSG_WARNING, __func__,
1110 "Failed to add ca_cert_blob to "
1111 "certificate store");
1112 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1113 ERR_GET_REASON(err) ==
1114 X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1115 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1116 "cert already in hash table error",
1117 __func__);
1118 } else {
1119 X509_free(cert);
1120 return -1;
1121 }
1122 }
1123 X509_free(cert);
1124 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob "
1125 "to certificate store", __func__);
1126 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1127 return 0;
1128 }
1129
1130 #ifdef CONFIG_NATIVE_WINDOWS
1131 if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) ==
1132 0) {
1133 wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from "
1134 "system certificate store");
1135 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1136 return 0;
1137 }
1138 #endif /* CONFIG_NATIVE_WINDOWS */
1139
1140 if (ca_cert || ca_path) {
1141 #ifndef OPENSSL_NO_STDIO
1142 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) !=
1143 1) {
1144 tls_show_errors(MSG_WARNING, __func__,
1145 "Failed to load root certificates");
1146 if (ca_cert &&
1147 tls_load_ca_der(ssl_ctx, ca_cert) == 0) {
1148 wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded "
1149 "DER format CA certificate",
1150 __func__);
1151 } else
1152 return -1;
1153 } else {
1154 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1155 "certificate(s) loaded");
1156 tls_get_errors(ssl_ctx);
1157 }
1158 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1159 #else /* OPENSSL_NO_STDIO */
1160 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
1161 __func__);
1162 return -1;
1163 #endif /* OPENSSL_NO_STDIO */
1164 } else {
1165 /* No ca_cert configured - do not try to verify server
1166 * certificate */
1167 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
1168 }
1169
1170 return 0;
1171 }
1172
1173
1174 static int tls_global_ca_cert(SSL_CTX *ssl_ctx, const char *ca_cert)
1175 {
1176 if (ca_cert) {
1177 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1)
1178 {
1179 tls_show_errors(MSG_WARNING, __func__,
1180 "Failed to load root certificates");
1181 return -1;
1182 }
1183
1184 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1185 "certificate(s) loaded");
1186
1187 #ifndef OPENSSL_NO_STDIO
1188 /* Add the same CAs to the client certificate requests */
1189 SSL_CTX_set_client_CA_list(ssl_ctx,
1190 SSL_load_client_CA_file(ca_cert));
1191 #endif /* OPENSSL_NO_STDIO */
1192 }
1193
1194 return 0;
1195 }
1196
1197
1198 int tls_global_set_verify(void *ssl_ctx, int check_crl)
1199 {
1200 int flags;
1201
1202 if (check_crl) {
1203 X509_STORE *cs = SSL_CTX_get_cert_store(ssl_ctx);
1204 if (cs == NULL) {
1205 tls_show_errors(MSG_INFO, __func__, "Failed to get "
1206 "certificate store when enabling "
1207 "check_crl");
1208 return -1;
1209 }
1210 flags = X509_V_FLAG_CRL_CHECK;
1211 if (check_crl == 2)
1212 flags |= X509_V_FLAG_CRL_CHECK_ALL;
1213 X509_STORE_set_flags(cs, flags);
1214 }
1215 return 0;
1216 }
1217
1218
1219 static int tls_connection_set_subject_match(struct tls_connection *conn,
1220 const char *subject_match,
1221 const char *altsubject_match)
1222 {
1223 os_free(conn->subject_match);
1224 conn->subject_match = NULL;
1225 if (subject_match) {
1226 conn->subject_match = os_strdup(subject_match);
1227 if (conn->subject_match == NULL)
1228 return -1;
1229 }
1230
1231 os_free(conn->altsubject_match);
1232 conn->altsubject_match = NULL;
1233 if (altsubject_match) {
1234 conn->altsubject_match = os_strdup(altsubject_match);
1235 if (conn->altsubject_match == NULL)
1236 return -1;
1237 }
1238
1239 return 0;
1240 }
1241
1242
1243 int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn,
1244 int verify_peer)
1245 {
1246 if (conn == NULL)
1247 return -1;
1248
1249 if (verify_peer) {
1250 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER |
1251 SSL_VERIFY_FAIL_IF_NO_PEER_CERT |
1252 SSL_VERIFY_CLIENT_ONCE, tls_verify_cb);
1253 } else {
1254 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
1255 }
1256
1257 SSL_set_accept_state(conn->ssl);
1258
1259 return 0;
1260 }
1261
1262
1263 static int tls_connection_client_cert(struct tls_connection *conn,
1264 const char *client_cert,
1265 const u8 *client_cert_blob,
1266 size_t client_cert_blob_len)
1267 {
1268 if (client_cert == NULL && client_cert_blob == NULL)
1269 return 0;
1270
1271 if (client_cert_blob &&
1272 SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob,
1273 client_cert_blob_len) == 1) {
1274 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> "
1275 "OK");
1276 return 0;
1277 } else if (client_cert_blob) {
1278 tls_show_errors(MSG_DEBUG, __func__,
1279 "SSL_use_certificate_ASN1 failed");
1280 }
1281
1282 if (client_cert == NULL)
1283 return -1;
1284
1285 #ifndef OPENSSL_NO_STDIO
1286 if (SSL_use_certificate_file(conn->ssl, client_cert,
1287 SSL_FILETYPE_ASN1) == 1) {
1288 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)"
1289 " --> OK");
1290 return 0;
1291 } else {
1292 tls_show_errors(MSG_DEBUG, __func__,
1293 "SSL_use_certificate_file (DER) failed");
1294 }
1295
1296 if (SSL_use_certificate_file(conn->ssl, client_cert,
1297 SSL_FILETYPE_PEM) == 1) {
1298 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)"
1299 " --> OK");
1300 return 0;
1301 } else {
1302 tls_show_errors(MSG_DEBUG, __func__,
1303 "SSL_use_certificate_file (PEM) failed");
1304 }
1305 #else /* OPENSSL_NO_STDIO */
1306 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1307 #endif /* OPENSSL_NO_STDIO */
1308
1309 return -1;
1310 }
1311
1312
1313 static int tls_global_client_cert(SSL_CTX *ssl_ctx, const char *client_cert)
1314 {
1315 #ifndef OPENSSL_NO_STDIO
1316 if (client_cert == NULL)
1317 return 0;
1318
1319 if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1320 SSL_FILETYPE_ASN1) != 1 &&
1321 SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1322 SSL_FILETYPE_PEM) != 1) {
1323 tls_show_errors(MSG_INFO, __func__,
1324 "Failed to load client certificate");
1325 return -1;
1326 }
1327 return 0;
1328 #else /* OPENSSL_NO_STDIO */
1329 if (client_cert == NULL)
1330 return 0;
1331 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1332 return -1;
1333 #endif /* OPENSSL_NO_STDIO */
1334 }
1335
1336
1337 static int tls_passwd_cb(char *buf, int size, int rwflag, void *password)
1338 {
1339 if (password == NULL) {
1340 return 0;
1341 }
1342 os_strncpy(buf, (char *) password, size);
1343 buf[size - 1] = '\0';
1344 return os_strlen(buf);
1345 }
1346
1347
1348 #ifdef PKCS12_FUNCS
1349 static int tls_parse_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, PKCS12 *p12,
1350 const char *passwd)
1351 {
1352 EVP_PKEY *pkey;
1353 X509 *cert;
1354 STACK_OF(X509) *certs;
1355 int res = 0;
1356 char buf[256];
1357
1358 pkey = NULL;
1359 cert = NULL;
1360 certs = NULL;
1361 if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) {
1362 tls_show_errors(MSG_DEBUG, __func__,
1363 "Failed to parse PKCS12 file");
1364 PKCS12_free(p12);
1365 return -1;
1366 }
1367 wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data");
1368
1369 if (cert) {
1370 X509_NAME_oneline(X509_get_subject_name(cert), buf,
1371 sizeof(buf));
1372 wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: "
1373 "subject='%s'", buf);
1374 if (ssl) {
1375 if (SSL_use_certificate(ssl, cert) != 1)
1376 res = -1;
1377 } else {
1378 if (SSL_CTX_use_certificate(ssl_ctx, cert) != 1)
1379 res = -1;
1380 }
1381 X509_free(cert);
1382 }
1383
1384 if (pkey) {
1385 wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12");
1386 if (ssl) {
1387 if (SSL_use_PrivateKey(ssl, pkey) != 1)
1388 res = -1;
1389 } else {
1390 if (SSL_CTX_use_PrivateKey(ssl_ctx, pkey) != 1)
1391 res = -1;
1392 }
1393 EVP_PKEY_free(pkey);
1394 }
1395
1396 if (certs) {
1397 while ((cert = sk_X509_pop(certs)) != NULL) {
1398 X509_NAME_oneline(X509_get_subject_name(cert), buf,
1399 sizeof(buf));
1400 wpa_printf(MSG_DEBUG, "TLS: additional certificate"
1401 " from PKCS12: subject='%s'", buf);
1402 /*
1403 * There is no SSL equivalent for the chain cert - so
1404 * always add it to the context...
1405 */
1406 if (SSL_CTX_add_extra_chain_cert(ssl_ctx, cert) != 1) {
1407 res = -1;
1408 break;
1409 }
1410 }
1411 sk_X509_free(certs);
1412 }
1413
1414 PKCS12_free(p12);
1415
1416 if (res < 0)
1417 tls_get_errors(ssl_ctx);
1418
1419 return res;
1420 }
1421 #endif /* PKCS12_FUNCS */
1422
1423
1424 static int tls_read_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, const char *private_key,
1425 const char *passwd)
1426 {
1427 #ifdef PKCS12_FUNCS
1428 FILE *f;
1429 PKCS12 *p12;
1430
1431 f = fopen(private_key, "rb");
1432 if (f == NULL)
1433 return -1;
1434
1435 p12 = d2i_PKCS12_fp(f, NULL);
1436 fclose(f);
1437
1438 if (p12 == NULL) {
1439 tls_show_errors(MSG_INFO, __func__,
1440 "Failed to use PKCS#12 file");
1441 return -1;
1442 }
1443
1444 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
1445
1446 #else /* PKCS12_FUNCS */
1447 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read "
1448 "p12/pfx files");
1449 return -1;
1450 #endif /* PKCS12_FUNCS */
1451 }
1452
1453
1454 static int tls_read_pkcs12_blob(SSL_CTX *ssl_ctx, SSL *ssl,
1455 const u8 *blob, size_t len, const char *passwd)
1456 {
1457 #ifdef PKCS12_FUNCS
1458 PKCS12 *p12;
1459
1460 p12 = d2i_PKCS12(NULL, (OPENSSL_d2i_TYPE) &blob, len);
1461 if (p12 == NULL) {
1462 tls_show_errors(MSG_INFO, __func__,
1463 "Failed to use PKCS#12 blob");
1464 return -1;
1465 }
1466
1467 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
1468
1469 #else /* PKCS12_FUNCS */
1470 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse "
1471 "p12/pfx blobs");
1472 return -1;
1473 #endif /* PKCS12_FUNCS */
1474 }
1475
1476
1477 static int tls_connection_engine_private_key(struct tls_connection *conn)
1478 {
1479 #ifndef OPENSSL_NO_ENGINE
1480 if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) {
1481 tls_show_errors(MSG_ERROR, __func__,
1482 "ENGINE: cannot use private key for TLS");
1483 return -1;
1484 }
1485 if (!SSL_check_private_key(conn->ssl)) {
1486 tls_show_errors(MSG_INFO, __func__,
1487 "Private key failed verification");
1488 return -1;
1489 }
1490 return 0;
1491 #else /* OPENSSL_NO_ENGINE */
1492 wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but "
1493 "engine support was not compiled in");
1494 return -1;
1495 #endif /* OPENSSL_NO_ENGINE */
1496 }
1497
1498
1499 static int tls_connection_private_key(void *_ssl_ctx,
1500 struct tls_connection *conn,
1501 const char *private_key,
1502 const char *private_key_passwd,
1503 const u8 *private_key_blob,
1504 size_t private_key_blob_len)
1505 {
1506 SSL_CTX *ssl_ctx = _ssl_ctx;
1507 char *passwd;
1508 int ok;
1509
1510 if (private_key == NULL && private_key_blob == NULL)
1511 return 0;
1512
1513 if (private_key_passwd) {
1514 passwd = os_strdup(private_key_passwd);
1515 if (passwd == NULL)
1516 return -1;
1517 } else
1518 passwd = NULL;
1519
1520 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
1521 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
1522
1523 ok = 0;
1524 while (private_key_blob) {
1525 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl,
1526 (u8 *) private_key_blob,
1527 private_key_blob_len) == 1) {
1528 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
1529 "ASN1(EVP_PKEY_RSA) --> OK");
1530 ok = 1;
1531 break;
1532 } else {
1533 tls_show_errors(MSG_DEBUG, __func__,
1534 "SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA)"
1535 " failed");
1536 }
1537
1538 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl,
1539 (u8 *) private_key_blob,
1540 private_key_blob_len) == 1) {
1541 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
1542 "ASN1(EVP_PKEY_DSA) --> OK");
1543 ok = 1;
1544 break;
1545 } else {
1546 tls_show_errors(MSG_DEBUG, __func__,
1547 "SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA)"
1548 " failed");
1549 }
1550
1551 if (SSL_use_RSAPrivateKey_ASN1(conn->ssl,
1552 (u8 *) private_key_blob,
1553 private_key_blob_len) == 1) {
1554 wpa_printf(MSG_DEBUG, "OpenSSL: "
1555 "SSL_use_RSAPrivateKey_ASN1 --> OK");
1556 ok = 1;
1557 break;
1558 } else {
1559 tls_show_errors(MSG_DEBUG, __func__,
1560 "SSL_use_RSAPrivateKey_ASN1 failed");
1561 }
1562
1563 if (tls_read_pkcs12_blob(ssl_ctx, conn->ssl, private_key_blob,
1564 private_key_blob_len, passwd) == 0) {
1565 wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> "
1566 "OK");
1567 ok = 1;
1568 break;
1569 }
1570
1571 break;
1572 }
1573
1574 while (!ok && private_key) {
1575 #ifndef OPENSSL_NO_STDIO
1576 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
1577 SSL_FILETYPE_ASN1) == 1) {
1578 wpa_printf(MSG_DEBUG, "OpenSSL: "
1579 "SSL_use_PrivateKey_File (DER) --> OK");
1580 ok = 1;
1581 break;
1582 } else {
1583 tls_show_errors(MSG_DEBUG, __func__,
1584 "SSL_use_PrivateKey_File (DER) "
1585 "failed");
1586 }
1587
1588 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
1589 SSL_FILETYPE_PEM) == 1) {
1590 wpa_printf(MSG_DEBUG, "OpenSSL: "
1591 "SSL_use_PrivateKey_File (PEM) --> OK");
1592 ok = 1;
1593 break;
1594 } else {
1595 tls_show_errors(MSG_DEBUG, __func__,
1596 "SSL_use_PrivateKey_File (PEM) "
1597 "failed");
1598 }
1599 #else /* OPENSSL_NO_STDIO */
1600 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
1601 __func__);
1602 #endif /* OPENSSL_NO_STDIO */
1603
1604 if (tls_read_pkcs12(ssl_ctx, conn->ssl, private_key, passwd)
1605 == 0) {
1606 wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file "
1607 "--> OK");
1608 ok = 1;
1609 break;
1610 }
1611
1612 if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) {
1613 wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to "
1614 "access certificate store --> OK");
1615 ok = 1;
1616 break;
1617 }
1618
1619 break;
1620 }
1621
1622 if (!ok) {
1623 wpa_printf(MSG_INFO, "OpenSSL: Failed to load private key");
1624 os_free(passwd);
1625 ERR_clear_error();
1626 return -1;
1627 }
1628 ERR_clear_error();
1629 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
1630 os_free(passwd);
1631
1632 if (!SSL_check_private_key(conn->ssl)) {
1633 tls_show_errors(MSG_INFO, __func__, "Private key failed "
1634 "verification");
1635 return -1;
1636 }
1637
1638 wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully");
1639 return 0;
1640 }
1641
1642
1643 static int tls_global_private_key(SSL_CTX *ssl_ctx, const char *private_key,
1644 const char *private_key_passwd)
1645 {
1646 char *passwd;
1647
1648 if (private_key == NULL)
1649 return 0;
1650
1651 if (private_key_passwd) {
1652 passwd = os_strdup(private_key_passwd);
1653 if (passwd == NULL)
1654 return -1;
1655 } else
1656 passwd = NULL;
1657
1658 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
1659 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
1660 if (
1661 #ifndef OPENSSL_NO_STDIO
1662 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
1663 SSL_FILETYPE_ASN1) != 1 &&
1664 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
1665 SSL_FILETYPE_PEM) != 1 &&
1666 #endif /* OPENSSL_NO_STDIO */
1667 tls_read_pkcs12(ssl_ctx, NULL, private_key, passwd)) {
1668 tls_show_errors(MSG_INFO, __func__,
1669 "Failed to load private key");
1670 os_free(passwd);
1671 ERR_clear_error();
1672 return -1;
1673 }
1674 os_free(passwd);
1675 ERR_clear_error();
1676 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
1677
1678 if (!SSL_CTX_check_private_key(ssl_ctx)) {
1679 tls_show_errors(MSG_INFO, __func__,
1680 "Private key failed verification");
1681 return -1;
1682 }
1683
1684 return 0;
1685 }
1686
1687
1688 static int tls_connection_dh(struct tls_connection *conn, const char *dh_file)
1689 {
1690 #ifdef OPENSSL_NO_DH
1691 if (dh_file == NULL)
1692 return 0;
1693 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
1694 "dh_file specified");
1695 return -1;
1696 #else /* OPENSSL_NO_DH */
1697 DH *dh;
1698 BIO *bio;
1699
1700 /* TODO: add support for dh_blob */
1701 if (dh_file == NULL)
1702 return 0;
1703 if (conn == NULL)
1704 return -1;
1705
1706 bio = BIO_new_file(dh_file, "r");
1707 if (bio == NULL) {
1708 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
1709 dh_file, ERR_error_string(ERR_get_error(), NULL));
1710 return -1;
1711 }
1712 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
1713 BIO_free(bio);
1714 #ifndef OPENSSL_NO_DSA
1715 while (dh == NULL) {
1716 DSA *dsa;
1717 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
1718 " trying to parse as DSA params", dh_file,
1719 ERR_error_string(ERR_get_error(), NULL));
1720 bio = BIO_new_file(dh_file, "r");
1721 if (bio == NULL)
1722 break;
1723 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
1724 BIO_free(bio);
1725 if (!dsa) {
1726 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
1727 "'%s': %s", dh_file,
1728 ERR_error_string(ERR_get_error(), NULL));
1729 break;
1730 }
1731
1732 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
1733 dh = DSA_dup_DH(dsa);
1734 DSA_free(dsa);
1735 if (dh == NULL) {
1736 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
1737 "params into DH params");
1738 break;
1739 }
1740 break;
1741 }
1742 #endif /* !OPENSSL_NO_DSA */
1743 if (dh == NULL) {
1744 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
1745 "'%s'", dh_file);
1746 return -1;
1747 }
1748
1749 if (SSL_set_tmp_dh(conn->ssl, dh) != 1) {
1750 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
1751 "%s", dh_file,
1752 ERR_error_string(ERR_get_error(), NULL));
1753 DH_free(dh);
1754 return -1;
1755 }
1756 DH_free(dh);
1757 return 0;
1758 #endif /* OPENSSL_NO_DH */
1759 }
1760
1761
1762 int tls_connection_get_keys(void *ssl_ctx, struct tls_connection *conn,
1763 struct tls_keys *keys)
1764 {
1765 SSL *ssl;
1766
1767 if (conn == NULL || keys == NULL)
1768 return -1;
1769 ssl = conn->ssl;
1770 if (ssl == NULL || ssl->s3 == NULL || ssl->session == NULL)
1771 return -1;
1772
1773 os_memset(keys, 0, sizeof(*keys));
1774 keys->master_key = ssl->session->master_key;
1775 keys->master_key_len = ssl->session->master_key_length;
1776 keys->client_random = ssl->s3->client_random;
1777 keys->client_random_len = SSL3_RANDOM_SIZE;
1778 keys->server_random = ssl->s3->server_random;
1779 keys->server_random_len = SSL3_RANDOM_SIZE;
1780
1781 return 0;
1782 }
1783
1784
1785 int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
1786 const char *label, int server_random_first,
1787 u8 *out, size_t out_len)
1788 {
1789 return -1;
1790 }
1791
1792
1793 u8 * tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn,
1794 const u8 *in_data, size_t in_len,
1795 size_t *out_len, u8 **appl_data,
1796 size_t *appl_data_len)
1797 {
1798 int res;
1799 u8 *out_data;
1800
1801 if (appl_data)
1802 *appl_data = NULL;
1803
1804 /*
1805 * Give TLS handshake data from the server (if available) to OpenSSL
1806 * for processing.
1807 */
1808 if (in_data &&
1809 BIO_write(conn->ssl_in, in_data, in_len) < 0) {
1810 tls_show_errors(MSG_INFO, __func__,
1811 "Handshake failed - BIO_write");
1812 return NULL;
1813 }
1814
1815 /* Initiate TLS handshake or continue the existing handshake */
1816 res = SSL_connect(conn->ssl);
1817 if (res != 1) {
1818 int err = SSL_get_error(conn->ssl, res);
1819 if (err == SSL_ERROR_WANT_READ)
1820 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want "
1821 "more data");
1822 else if (err == SSL_ERROR_WANT_WRITE)
1823 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to "
1824 "write");
1825 else {
1826 tls_show_errors(MSG_INFO, __func__, "SSL_connect");
1827 conn->failed++;
1828 }
1829 }
1830
1831 /* Get the TLS handshake data to be sent to the server */
1832 res = BIO_ctrl_pending(conn->ssl_out);
1833 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
1834 out_data = os_malloc(res == 0 ? 1 : res);
1835 if (out_data == NULL) {
1836 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
1837 "handshake output (%d bytes)", res);
1838 if (BIO_reset(conn->ssl_out) < 0) {
1839 tls_show_errors(MSG_INFO, __func__,
1840 "BIO_reset failed");
1841 }
1842 *out_len = 0;
1843 return NULL;
1844 }
1845 res = res == 0 ? 0 : BIO_read(conn->ssl_out, out_data, res);
1846 if (res < 0) {
1847 tls_show_errors(MSG_INFO, __func__,
1848 "Handshake failed - BIO_read");
1849 if (BIO_reset(conn->ssl_out) < 0) {
1850 tls_show_errors(MSG_INFO, __func__,
1851 "BIO_reset failed");
1852 }
1853 *out_len = 0;
1854 return NULL;
1855 }
1856 *out_len = res;
1857
1858 if (SSL_is_init_finished(conn->ssl) && appl_data) {
1859 *appl_data = os_malloc(in_len);
1860 if (*appl_data) {
1861 res = SSL_read(conn->ssl, *appl_data, in_len);
1862 if (res < 0) {
1863 tls_show_errors(MSG_INFO, __func__,
1864 "Failed to read possible "
1865 "Application Data");
1866 os_free(*appl_data);
1867 *appl_data = NULL;
1868 } else {
1869 *appl_data_len = res;
1870 wpa_hexdump_key(MSG_MSGDUMP, "SSL: Application"
1871 " Data in Finish message",
1872 *appl_data, *appl_data_len);
1873 }
1874 }
1875 }
1876
1877 return out_data;
1878 }
1879
1880
1881 u8 * tls_connection_server_handshake(void *ssl_ctx,
1882 struct tls_connection *conn,
1883 const u8 *in_data, size_t in_len,
1884 size_t *out_len)
1885 {
1886 int res;
1887 u8 *out_data;
1888 char buf[10];
1889
1890 if (in_data &&
1891 BIO_write(conn->ssl_in, in_data, in_len) < 0) {
1892 tls_show_errors(MSG_INFO, __func__,
1893 "Handshake failed - BIO_write");
1894 return NULL;
1895 }
1896
1897 res = SSL_read(conn->ssl, buf, sizeof(buf));
1898 if (res >= 0) {
1899 wpa_printf(MSG_DEBUG, "SSL: Unexpected data from SSL_read "
1900 "(res=%d)", res);
1901 }
1902
1903 res = BIO_ctrl_pending(conn->ssl_out);
1904 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
1905 out_data = os_malloc(res == 0 ? 1 : res);
1906 if (out_data == NULL) {
1907 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
1908 "handshake output (%d bytes)", res);
1909 if (BIO_reset(conn->ssl_out) < 0) {
1910 tls_show_errors(MSG_INFO, __func__,
1911 "BIO_reset failed");
1912 }
1913 *out_len = 0;
1914 return NULL;
1915 }
1916 res = res == 0 ? 0 : BIO_read(conn->ssl_out, out_data, res);
1917 if (res < 0) {
1918 tls_show_errors(MSG_INFO, __func__,
1919 "Handshake failed - BIO_read");
1920 if (BIO_reset(conn->ssl_out) < 0) {
1921 tls_show_errors(MSG_INFO, __func__,
1922 "BIO_reset failed");
1923 }
1924 *out_len = 0;
1925 return NULL;
1926 }
1927 *out_len = res;
1928 return out_data;
1929 }
1930
1931
1932 int tls_connection_encrypt(void *ssl_ctx, struct tls_connection *conn,
1933 const u8 *in_data, size_t in_len,
1934 u8 *out_data, size_t out_len)
1935 {
1936 int res;
1937
1938 if (conn == NULL)
1939 return -1;
1940
1941 /* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */
1942 if ((res = BIO_reset(conn->ssl_in)) < 0 ||
1943 (res = BIO_reset(conn->ssl_out)) < 0) {
1944 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
1945 return res;
1946 }
1947 res = SSL_write(conn->ssl, in_data, in_len);
1948 if (res < 0) {
1949 tls_show_errors(MSG_INFO, __func__,
1950 "Encryption failed - SSL_write");
1951 return res;
1952 }
1953
1954 /* Read encrypted data to be sent to the server */
1955 res = BIO_read(conn->ssl_out, out_data, out_len);
1956 if (res < 0) {
1957 tls_show_errors(MSG_INFO, __func__,
1958 "Encryption failed - BIO_read");
1959 return res;
1960 }
1961
1962 return res;
1963 }
1964
1965
1966 int tls_connection_decrypt(void *ssl_ctx, struct tls_connection *conn,
1967 const u8 *in_data, size_t in_len,
1968 u8 *out_data, size_t out_len)
1969 {
1970 int res;
1971
1972 /* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */
1973 res = BIO_write(conn->ssl_in, in_data, in_len);
1974 if (res < 0) {
1975 tls_show_errors(MSG_INFO, __func__,
1976 "Decryption failed - BIO_write");
1977 return res;
1978 }
1979 if (BIO_reset(conn->ssl_out) < 0) {
1980 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
1981 return res;
1982 }
1983
1984 /* Read decrypted data for further processing */
1985 res = SSL_read(conn->ssl, out_data, out_len);
1986 if (res < 0) {
1987 tls_show_errors(MSG_INFO, __func__,
1988 "Decryption failed - SSL_read");
1989 return res;
1990 }
1991
1992 return res;
1993 }
1994
1995
1996 int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn)
1997 {
1998 return conn ? conn->ssl->hit : 0;
1999 }
2000
2001
2002 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC)
2003 /* Pre-shared secred requires a patch to openssl, so this function is
2004 * commented out unless explicitly needed for EAP-FAST in order to be able to
2005 * build this file with unmodified openssl. */
2006
2007 static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
2008 STACK_OF(SSL_CIPHER) *peer_ciphers,
2009 SSL_CIPHER **cipher, void *arg)
2010 {
2011 struct tls_connection *conn = arg;
2012
2013 if (conn == NULL || conn->pre_shared_secret == 0)
2014 return 0;
2015
2016 os_memcpy(secret, conn->pre_shared_secret,
2017 conn->pre_shared_secret_len);
2018 *secret_len = conn->pre_shared_secret_len;
2019
2020 return 1;
2021 }
2022
2023
2024 int tls_connection_set_master_key(void *ssl_ctx, struct tls_connection *conn,
2025 const u8 *key, size_t key_len)
2026 {
2027 if (conn == NULL || key_len > SSL_MAX_MASTER_KEY_LENGTH)
2028 return -1;
2029
2030 os_free(conn->pre_shared_secret);
2031 conn->pre_shared_secret = NULL;
2032 conn->pre_shared_secret_len = 0;
2033
2034 if (key) {
2035 conn->pre_shared_secret = os_malloc(key_len);
2036 if (conn->pre_shared_secret) {
2037 os_memcpy(conn->pre_shared_secret, key, key_len);
2038 conn->pre_shared_secret_len = key_len;
2039 }
2040 if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb,
2041 conn) != 1)
2042 return -1;
2043 } else {
2044 if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1)
2045 return -1;
2046 }
2047
2048 return 0;
2049 }
2050 #endif /* EAP_FAST || EAP_FAST_DYNAMIC */
2051
2052
2053 int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
2054 u8 *ciphers)
2055 {
2056 char buf[100], *pos, *end;
2057 u8 *c;
2058 int ret;
2059
2060 if (conn == NULL || conn->ssl == NULL || ciphers == NULL)
2061 return -1;
2062
2063 buf[0] = '\0';
2064 pos = buf;
2065 end = pos + sizeof(buf);
2066
2067 c = ciphers;
2068 while (*c != TLS_CIPHER_NONE) {
2069 const char *suite;
2070
2071 switch (*c) {
2072 case TLS_CIPHER_RC4_SHA:
2073 suite = "RC4-SHA";
2074 break;
2075 case TLS_CIPHER_AES128_SHA:
2076 suite = "AES128-SHA";
2077 break;
2078 case TLS_CIPHER_RSA_DHE_AES128_SHA:
2079 suite = "DHE-RSA-AES128-SHA";
2080 break;
2081 case TLS_CIPHER_ANON_DH_AES128_SHA:
2082 suite = "ADH-AES128-SHA";
2083 break;
2084 default:
2085 wpa_printf(MSG_DEBUG, "TLS: Unsupported "
2086 "cipher selection: %d", *c);
2087 return -1;
2088 }
2089 ret = os_snprintf(pos, end - pos, ":%s", suite);
2090 if (ret < 0 || ret >= end - pos)
2091 break;
2092 pos += ret;
2093
2094 c++;
2095 }
2096
2097 wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1);
2098
2099 if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) {
2100 tls_show_errors(MSG_INFO, __func__,
2101 "Cipher suite configuration failed");
2102 return -1;
2103 }
2104
2105 return 0;
2106 }
2107
2108
2109 int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn,
2110 char *buf, size_t buflen)
2111 {
2112 const char *name;
2113 if (conn == NULL || conn->ssl == NULL)
2114 return -1;
2115
2116 name = SSL_get_cipher(conn->ssl);
2117 if (name == NULL)
2118 return -1;
2119
2120 os_snprintf(buf, buflen, "%s", name);
2121 buf[buflen - 1] = '\0';
2122 return 0;
2123 }
2124
2125
2126 int tls_connection_enable_workaround(void *ssl_ctx,
2127 struct tls_connection *conn)
2128 {
2129 SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
2130
2131 return 0;
2132 }
2133
2134
2135 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC)
2136 /* ClientHello TLS extensions require a patch to openssl, so this function is
2137 * commented out unless explicitly needed for EAP-FAST in order to be able to
2138 * build this file with unmodified openssl. */
2139 int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn,
2140 int ext_type, const u8 *data,
2141 size_t data_len)
2142 {
2143 if (conn == NULL || conn->ssl == NULL)
2144 return -1;
2145
2146 if (SSL_set_hello_extension(conn->ssl, ext_type, (void *) data,
2147 data_len) != 1)
2148 return -1;
2149
2150 return 0;
2151 }
2152 #endif /* EAP_FAST || EAP_FAST_DYNAMIC */
2153
2154
2155 int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn)
2156 {
2157 if (conn == NULL)
2158 return -1;
2159 return conn->failed;
2160 }
2161
2162
2163 int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn)
2164 {
2165 if (conn == NULL)
2166 return -1;
2167 return conn->read_alerts;
2168 }
2169
2170
2171 int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn)
2172 {
2173 if (conn == NULL)
2174 return -1;
2175 return conn->write_alerts;
2176 }
2177
2178
2179 int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
2180 const struct tls_connection_params *params)
2181 {
2182 int ret;
2183 unsigned long err;
2184
2185 if (conn == NULL)
2186 return -1;
2187
2188 while ((err = ERR_get_error())) {
2189 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
2190 __func__, ERR_error_string(err, NULL));
2191 }
2192
2193 if (tls_connection_set_subject_match(conn,
2194 params->subject_match,
2195 params->altsubject_match))
2196 return -1;
2197 if (tls_connection_ca_cert(tls_ctx, conn, params->ca_cert,
2198 params->ca_cert_blob,
2199 params->ca_cert_blob_len,
2200 params->ca_path))
2201 return -1;
2202 if (tls_connection_client_cert(conn, params->client_cert,
2203 params->client_cert_blob,
2204 params->client_cert_blob_len))
2205 return -1;
2206
2207 if (params->engine) {
2208 wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine");
2209 ret = tls_engine_init(conn, params->engine_id, params->pin,
2210 params->key_id);
2211 if (ret)
2212 return ret;
2213 if (tls_connection_engine_private_key(conn))
2214 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
2215 } else if (tls_connection_private_key(tls_ctx, conn,
2216 params->private_key,
2217 params->private_key_passwd,
2218 params->private_key_blob,
2219 params->private_key_blob_len)) {
2220 wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'",
2221 params->private_key);
2222 return -1;
2223 }
2224
2225 if (tls_connection_dh(conn, params->dh_file)) {
2226 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
2227 params->dh_file);
2228 return -1;
2229 }
2230
2231 tls_get_errors(tls_ctx);
2232
2233 return 0;
2234 }
2235
2236
2237 int tls_global_set_params(void *tls_ctx,
2238 const struct tls_connection_params *params)
2239 {
2240 SSL_CTX *ssl_ctx = tls_ctx;
2241 unsigned long err;
2242
2243 while ((err = ERR_get_error())) {
2244 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
2245 __func__, ERR_error_string(err, NULL));
2246 }
2247
2248 if (tls_global_ca_cert(ssl_ctx, params->ca_cert))
2249 return -1;
2250
2251 if (tls_global_client_cert(ssl_ctx, params->client_cert))
2252 return -1;
2253
2254 if (tls_global_private_key(ssl_ctx, params->private_key,
2255 params->private_key_passwd))
2256 return -1;
2257
2258 return 0;
2259 }
2260
2261
2262 int tls_connection_get_keyblock_size(void *tls_ctx,
2263 struct tls_connection *conn)
2264 {
2265 const EVP_CIPHER *c;
2266 const EVP_MD *h;
2267
2268 if (conn == NULL || conn->ssl == NULL ||
2269 conn->ssl->enc_read_ctx == NULL ||
2270 conn->ssl->enc_read_ctx->cipher == NULL ||
2271 conn->ssl->read_hash == NULL)
2272 return -1;
2273
2274 c = conn->ssl->enc_read_ctx->cipher;
2275 h = conn->ssl->read_hash;
2276
2277 return 2 * (EVP_CIPHER_key_length(c) +
2278 EVP_MD_size(h) +
2279 EVP_CIPHER_iv_length(c));
2280 }
2281
2282
2283 unsigned int tls_capabilities(void *tls_ctx)
2284 {
2285 return 0;
2286 }
2287
2288
2289 int tls_connection_set_ia(void *tls_ctx, struct tls_connection *conn,
2290 int tls_ia)
2291 {
2292 return -1;
2293 }
2294
2295
2296 int tls_connection_ia_send_phase_finished(void *tls_ctx,
2297 struct tls_connection *conn,
2298 int final,
2299 u8 *out_data, size_t out_len)
2300 {
2301 return -1;
2302 }
2303
2304
2305 int tls_connection_ia_final_phase_finished(void *tls_ctx,
2306 struct tls_connection *conn)
2307 {
2308 return -1;
2309 }
2310
2311
2312 int tls_connection_ia_permute_inner_secret(void *tls_ctx,
2313 struct tls_connection *conn,
2314 const u8 *key, size_t key_len)
2315 {
2316 return -1;
2317 }
DragonFly BSD