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turns printfs back on
[freebsd-src/fkvm-freebsd.git] / contrib / hostapd / tls_openssl.c
blobd5aafaaa89d4960b84f7131917ce484070c92c08
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 /*
1099 * Remove previously configured trusted CA certificates before adding
1100 * new ones.
1101 */
1102 X509_STORE_free(ssl_ctx->cert_store);
1103 ssl_ctx->cert_store = X509_STORE_new();
1104 if (ssl_ctx->cert_store == NULL) {
1105 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
1106 "certificate store", __func__);
1107 return -1;
1108 }
1109
1110 if (ca_cert_blob) {
1111 X509 *cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ca_cert_blob,
1112 ca_cert_blob_len);
1113 if (cert == NULL) {
1114 tls_show_errors(MSG_WARNING, __func__,
1115 "Failed to parse ca_cert_blob");
1116 return -1;
1117 }
1118
1119 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
1120 unsigned long err = ERR_peek_error();
1121 tls_show_errors(MSG_WARNING, __func__,
1122 "Failed to add ca_cert_blob to "
1123 "certificate store");
1124 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1125 ERR_GET_REASON(err) ==
1126 X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1127 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1128 "cert already in hash table error",
1129 __func__);
1130 } else {
1131 X509_free(cert);
1132 return -1;
1133 }
1134 }
1135 X509_free(cert);
1136 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob "
1137 "to certificate store", __func__);
1138 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1139 return 0;
1140 }
1141
1142 #ifdef CONFIG_NATIVE_WINDOWS
1143 if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) ==
1144 0) {
1145 wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from "
1146 "system certificate store");
1147 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1148 return 0;
1149 }
1150 #endif /* CONFIG_NATIVE_WINDOWS */
1151
1152 if (ca_cert || ca_path) {
1153 #ifndef OPENSSL_NO_STDIO
1154 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) !=
1155 1) {
1156 tls_show_errors(MSG_WARNING, __func__,
1157 "Failed to load root certificates");
1158 if (ca_cert &&
1159 tls_load_ca_der(ssl_ctx, ca_cert) == 0) {
1160 wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded "
1161 "DER format CA certificate",
1162 __func__);
1163 } else
1164 return -1;
1165 } else {
1166 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1167 "certificate(s) loaded");
1168 tls_get_errors(ssl_ctx);
1169 }
1170 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1171 #else /* OPENSSL_NO_STDIO */
1172 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
1173 __func__);
1174 return -1;
1175 #endif /* OPENSSL_NO_STDIO */
1176 } else {
1177 /* No ca_cert configured - do not try to verify server
1178 * certificate */
1179 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
1180 }
1181
1182 return 0;
1183 }
1184
1185
1186 static int tls_global_ca_cert(SSL_CTX *ssl_ctx, const char *ca_cert)
1187 {
1188 if (ca_cert) {
1189 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1)
1190 {
1191 tls_show_errors(MSG_WARNING, __func__,
1192 "Failed to load root certificates");
1193 return -1;
1194 }
1195
1196 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1197 "certificate(s) loaded");
1198
1199 #ifndef OPENSSL_NO_STDIO
1200 /* Add the same CAs to the client certificate requests */
1201 SSL_CTX_set_client_CA_list(ssl_ctx,
1202 SSL_load_client_CA_file(ca_cert));
1203 #endif /* OPENSSL_NO_STDIO */
1204 }
1205
1206 return 0;
1207 }
1208
1209
1210 int tls_global_set_verify(void *ssl_ctx, int check_crl)
1211 {
1212 int flags;
1213
1214 if (check_crl) {
1215 X509_STORE *cs = SSL_CTX_get_cert_store(ssl_ctx);
1216 if (cs == NULL) {
1217 tls_show_errors(MSG_INFO, __func__, "Failed to get "
1218 "certificate store when enabling "
1219 "check_crl");
1220 return -1;
1221 }
1222 flags = X509_V_FLAG_CRL_CHECK;
1223 if (check_crl == 2)
1224 flags |= X509_V_FLAG_CRL_CHECK_ALL;
1225 X509_STORE_set_flags(cs, flags);
1226 }
1227 return 0;
1228 }
1229
1230
1231 static int tls_connection_set_subject_match(struct tls_connection *conn,
1232 const char *subject_match,
1233 const char *altsubject_match)
1234 {
1235 os_free(conn->subject_match);
1236 conn->subject_match = NULL;
1237 if (subject_match) {
1238 conn->subject_match = os_strdup(subject_match);
1239 if (conn->subject_match == NULL)
1240 return -1;
1241 }
1242
1243 os_free(conn->altsubject_match);
1244 conn->altsubject_match = NULL;
1245 if (altsubject_match) {
1246 conn->altsubject_match = os_strdup(altsubject_match);
1247 if (conn->altsubject_match == NULL)
1248 return -1;
1249 }
1250
1251 return 0;
1252 }
1253
1254
1255 int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn,
1256 int verify_peer)
1257 {
1258 if (conn == NULL)
1259 return -1;
1260
1261 if (verify_peer) {
1262 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER |
1263 SSL_VERIFY_FAIL_IF_NO_PEER_CERT |
1264 SSL_VERIFY_CLIENT_ONCE, tls_verify_cb);
1265 } else {
1266 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
1267 }
1268
1269 SSL_set_accept_state(conn->ssl);
1270
1271 return 0;
1272 }
1273
1274
1275 static int tls_connection_client_cert(struct tls_connection *conn,
1276 const char *client_cert,
1277 const u8 *client_cert_blob,
1278 size_t client_cert_blob_len)
1279 {
1280 if (client_cert == NULL && client_cert_blob == NULL)
1281 return 0;
1282
1283 if (client_cert_blob &&
1284 SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob,
1285 client_cert_blob_len) == 1) {
1286 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> "
1287 "OK");
1288 return 0;
1289 } else if (client_cert_blob) {
1290 tls_show_errors(MSG_DEBUG, __func__,
1291 "SSL_use_certificate_ASN1 failed");
1292 }
1293
1294 if (client_cert == NULL)
1295 return -1;
1296
1297 #ifndef OPENSSL_NO_STDIO
1298 if (SSL_use_certificate_file(conn->ssl, client_cert,
1299 SSL_FILETYPE_ASN1) == 1) {
1300 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)"
1301 " --> OK");
1302 return 0;
1303 } else {
1304 tls_show_errors(MSG_DEBUG, __func__,
1305 "SSL_use_certificate_file (DER) failed");
1306 }
1307
1308 if (SSL_use_certificate_file(conn->ssl, client_cert,
1309 SSL_FILETYPE_PEM) == 1) {
1310 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)"
1311 " --> OK");
1312 return 0;
1313 } else {
1314 tls_show_errors(MSG_DEBUG, __func__,
1315 "SSL_use_certificate_file (PEM) failed");
1316 }
1317 #else /* OPENSSL_NO_STDIO */
1318 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1319 #endif /* OPENSSL_NO_STDIO */
1320
1321 return -1;
1322 }
1323
1324
1325 static int tls_global_client_cert(SSL_CTX *ssl_ctx, const char *client_cert)
1326 {
1327 #ifndef OPENSSL_NO_STDIO
1328 if (client_cert == NULL)
1329 return 0;
1330
1331 if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1332 SSL_FILETYPE_ASN1) != 1 &&
1333 SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1334 SSL_FILETYPE_PEM) != 1) {
1335 tls_show_errors(MSG_INFO, __func__,
1336 "Failed to load client certificate");
1337 return -1;
1338 }
1339 return 0;
1340 #else /* OPENSSL_NO_STDIO */
1341 if (client_cert == NULL)
1342 return 0;
1343 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1344 return -1;
1345 #endif /* OPENSSL_NO_STDIO */
1346 }
1347
1348
1349 static int tls_passwd_cb(char *buf, int size, int rwflag, void *password)
1350 {
1351 if (password == NULL) {
1352 return 0;
1353 }
1354 os_strncpy(buf, (char *) password, size);
1355 buf[size - 1] = '\0';
1356 return os_strlen(buf);
1357 }
1358
1359
1360 #ifdef PKCS12_FUNCS
1361 static int tls_parse_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, PKCS12 *p12,
1362 const char *passwd)
1363 {
1364 EVP_PKEY *pkey;
1365 X509 *cert;
1366 STACK_OF(X509) *certs;
1367 int res = 0;
1368 char buf[256];
1369
1370 pkey = NULL;
1371 cert = NULL;
1372 certs = NULL;
1373 if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) {
1374 tls_show_errors(MSG_DEBUG, __func__,
1375 "Failed to parse PKCS12 file");
1376 PKCS12_free(p12);
1377 return -1;
1378 }
1379 wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data");
1380
1381 if (cert) {
1382 X509_NAME_oneline(X509_get_subject_name(cert), buf,
1383 sizeof(buf));
1384 wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: "
1385 "subject='%s'", buf);
1386 if (ssl) {
1387 if (SSL_use_certificate(ssl, cert) != 1)
1388 res = -1;
1389 } else {
1390 if (SSL_CTX_use_certificate(ssl_ctx, cert) != 1)
1391 res = -1;
1392 }
1393 X509_free(cert);
1394 }
1395
1396 if (pkey) {
1397 wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12");
1398 if (ssl) {
1399 if (SSL_use_PrivateKey(ssl, pkey) != 1)
1400 res = -1;
1401 } else {
1402 if (SSL_CTX_use_PrivateKey(ssl_ctx, pkey) != 1)
1403 res = -1;
1404 }
1405 EVP_PKEY_free(pkey);
1406 }
1407
1408 if (certs) {
1409 while ((cert = sk_X509_pop(certs)) != NULL) {
1410 X509_NAME_oneline(X509_get_subject_name(cert), buf,
1411 sizeof(buf));
1412 wpa_printf(MSG_DEBUG, "TLS: additional certificate"
1413 " from PKCS12: subject='%s'", buf);
1414 /*
1415 * There is no SSL equivalent for the chain cert - so
1416 * always add it to the context...
1417 */
1418 if (SSL_CTX_add_extra_chain_cert(ssl_ctx, cert) != 1) {
1419 res = -1;
1420 break;
1421 }
1422 }
1423 sk_X509_free(certs);
1424 }
1425
1426 PKCS12_free(p12);
1427
1428 if (res < 0)
1429 tls_get_errors(ssl_ctx);
1430
1431 return res;
1432 }
1433 #endif /* PKCS12_FUNCS */
1434
1435
1436 static int tls_read_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, const char *private_key,
1437 const char *passwd)
1438 {
1439 #ifdef PKCS12_FUNCS
1440 FILE *f;
1441 PKCS12 *p12;
1442
1443 f = fopen(private_key, "rb");
1444 if (f == NULL)
1445 return -1;
1446
1447 p12 = d2i_PKCS12_fp(f, NULL);
1448 fclose(f);
1449
1450 if (p12 == NULL) {
1451 tls_show_errors(MSG_INFO, __func__,
1452 "Failed to use PKCS#12 file");
1453 return -1;
1454 }
1455
1456 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
1457
1458 #else /* PKCS12_FUNCS */
1459 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read "
1460 "p12/pfx files");
1461 return -1;
1462 #endif /* PKCS12_FUNCS */
1463 }
1464
1465
1466 static int tls_read_pkcs12_blob(SSL_CTX *ssl_ctx, SSL *ssl,
1467 const u8 *blob, size_t len, const char *passwd)
1468 {
1469 #ifdef PKCS12_FUNCS
1470 PKCS12 *p12;
1471
1472 p12 = d2i_PKCS12(NULL, (OPENSSL_d2i_TYPE) &blob, len);
1473 if (p12 == NULL) {
1474 tls_show_errors(MSG_INFO, __func__,
1475 "Failed to use PKCS#12 blob");
1476 return -1;
1477 }
1478
1479 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
1480
1481 #else /* PKCS12_FUNCS */
1482 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse "
1483 "p12/pfx blobs");
1484 return -1;
1485 #endif /* PKCS12_FUNCS */
1486 }
1487
1488
1489 static int tls_connection_engine_private_key(struct tls_connection *conn)
1490 {
1491 #ifndef OPENSSL_NO_ENGINE
1492 if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) {
1493 tls_show_errors(MSG_ERROR, __func__,
1494 "ENGINE: cannot use private key for TLS");
1495 return -1;
1496 }
1497 if (!SSL_check_private_key(conn->ssl)) {
1498 tls_show_errors(MSG_INFO, __func__,
1499 "Private key failed verification");
1500 return -1;
1501 }
1502 return 0;
1503 #else /* OPENSSL_NO_ENGINE */
1504 wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but "
1505 "engine support was not compiled in");
1506 return -1;
1507 #endif /* OPENSSL_NO_ENGINE */
1508 }
1509
1510
1511 static int tls_connection_private_key(void *_ssl_ctx,
1512 struct tls_connection *conn,
1513 const char *private_key,
1514 const char *private_key_passwd,
1515 const u8 *private_key_blob,
1516 size_t private_key_blob_len)
1517 {
1518 SSL_CTX *ssl_ctx = _ssl_ctx;
1519 char *passwd;
1520 int ok;
1521
1522 if (private_key == NULL && private_key_blob == NULL)
1523 return 0;
1524
1525 if (private_key_passwd) {
1526 passwd = os_strdup(private_key_passwd);
1527 if (passwd == NULL)
1528 return -1;
1529 } else
1530 passwd = NULL;
1531
1532 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
1533 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
1534
1535 ok = 0;
1536 while (private_key_blob) {
1537 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl,
1538 (u8 *) private_key_blob,
1539 private_key_blob_len) == 1) {
1540 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
1541 "ASN1(EVP_PKEY_RSA) --> OK");
1542 ok = 1;
1543 break;
1544 } else {
1545 tls_show_errors(MSG_DEBUG, __func__,
1546 "SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA)"
1547 " failed");
1548 }
1549
1550 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl,
1551 (u8 *) private_key_blob,
1552 private_key_blob_len) == 1) {
1553 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
1554 "ASN1(EVP_PKEY_DSA) --> OK");
1555 ok = 1;
1556 break;
1557 } else {
1558 tls_show_errors(MSG_DEBUG, __func__,
1559 "SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA)"
1560 " failed");
1561 }
1562
1563 if (SSL_use_RSAPrivateKey_ASN1(conn->ssl,
1564 (u8 *) private_key_blob,
1565 private_key_blob_len) == 1) {
1566 wpa_printf(MSG_DEBUG, "OpenSSL: "
1567 "SSL_use_RSAPrivateKey_ASN1 --> OK");
1568 ok = 1;
1569 break;
1570 } else {
1571 tls_show_errors(MSG_DEBUG, __func__,
1572 "SSL_use_RSAPrivateKey_ASN1 failed");
1573 }
1574
1575 if (tls_read_pkcs12_blob(ssl_ctx, conn->ssl, private_key_blob,
1576 private_key_blob_len, passwd) == 0) {
1577 wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> "
1578 "OK");
1579 ok = 1;
1580 break;
1581 }
1582
1583 break;
1584 }
1585
1586 while (!ok && private_key) {
1587 #ifndef OPENSSL_NO_STDIO
1588 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
1589 SSL_FILETYPE_ASN1) == 1) {
1590 wpa_printf(MSG_DEBUG, "OpenSSL: "
1591 "SSL_use_PrivateKey_File (DER) --> OK");
1592 ok = 1;
1593 break;
1594 } else {
1595 tls_show_errors(MSG_DEBUG, __func__,
1596 "SSL_use_PrivateKey_File (DER) "
1597 "failed");
1598 }
1599
1600 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
1601 SSL_FILETYPE_PEM) == 1) {
1602 wpa_printf(MSG_DEBUG, "OpenSSL: "
1603 "SSL_use_PrivateKey_File (PEM) --> OK");
1604 ok = 1;
1605 break;
1606 } else {
1607 tls_show_errors(MSG_DEBUG, __func__,
1608 "SSL_use_PrivateKey_File (PEM) "
1609 "failed");
1610 }
1611 #else /* OPENSSL_NO_STDIO */
1612 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
1613 __func__);
1614 #endif /* OPENSSL_NO_STDIO */
1615
1616 if (tls_read_pkcs12(ssl_ctx, conn->ssl, private_key, passwd)
1617 == 0) {
1618 wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file "
1619 "--> OK");
1620 ok = 1;
1621 break;
1622 }
1623
1624 if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) {
1625 wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to "
1626 "access certificate store --> OK");
1627 ok = 1;
1628 break;
1629 }
1630
1631 break;
1632 }
1633
1634 if (!ok) {
1635 wpa_printf(MSG_INFO, "OpenSSL: Failed to load private key");
1636 os_free(passwd);
1637 ERR_clear_error();
1638 return -1;
1639 }
1640 ERR_clear_error();
1641 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
1642 os_free(passwd);
1643
1644 if (!SSL_check_private_key(conn->ssl)) {
1645 tls_show_errors(MSG_INFO, __func__, "Private key failed "
1646 "verification");
1647 return -1;
1648 }
1649
1650 wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully");
1651 return 0;
1652 }
1653
1654
1655 static int tls_global_private_key(SSL_CTX *ssl_ctx, const char *private_key,
1656 const char *private_key_passwd)
1657 {
1658 char *passwd;
1659
1660 if (private_key == NULL)
1661 return 0;
1662
1663 if (private_key_passwd) {
1664 passwd = os_strdup(private_key_passwd);
1665 if (passwd == NULL)
1666 return -1;
1667 } else
1668 passwd = NULL;
1669
1670 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
1671 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
1672 if (
1673 #ifndef OPENSSL_NO_STDIO
1674 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
1675 SSL_FILETYPE_ASN1) != 1 &&
1676 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
1677 SSL_FILETYPE_PEM) != 1 &&
1678 #endif /* OPENSSL_NO_STDIO */
1679 tls_read_pkcs12(ssl_ctx, NULL, private_key, passwd)) {
1680 tls_show_errors(MSG_INFO, __func__,
1681 "Failed to load private key");
1682 os_free(passwd);
1683 ERR_clear_error();
1684 return -1;
1685 }
1686 os_free(passwd);
1687 ERR_clear_error();
1688 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
1689
1690 if (!SSL_CTX_check_private_key(ssl_ctx)) {
1691 tls_show_errors(MSG_INFO, __func__,
1692 "Private key failed verification");
1693 return -1;
1694 }
1695
1696 return 0;
1697 }
1698
1699
1700 static int tls_connection_dh(struct tls_connection *conn, const char *dh_file)
1701 {
1702 #ifdef OPENSSL_NO_DH
1703 if (dh_file == NULL)
1704 return 0;
1705 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
1706 "dh_file specified");
1707 return -1;
1708 #else /* OPENSSL_NO_DH */
1709 DH *dh;
1710 BIO *bio;
1711
1712 /* TODO: add support for dh_blob */
1713 if (dh_file == NULL)
1714 return 0;
1715 if (conn == NULL)
1716 return -1;
1717
1718 bio = BIO_new_file(dh_file, "r");
1719 if (bio == NULL) {
1720 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
1721 dh_file, ERR_error_string(ERR_get_error(), NULL));
1722 return -1;
1723 }
1724 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
1725 BIO_free(bio);
1726 #ifndef OPENSSL_NO_DSA
1727 while (dh == NULL) {
1728 DSA *dsa;
1729 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
1730 " trying to parse as DSA params", dh_file,
1731 ERR_error_string(ERR_get_error(), NULL));
1732 bio = BIO_new_file(dh_file, "r");
1733 if (bio == NULL)
1734 break;
1735 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
1736 BIO_free(bio);
1737 if (!dsa) {
1738 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
1739 "'%s': %s", dh_file,
1740 ERR_error_string(ERR_get_error(), NULL));
1741 break;
1742 }
1743
1744 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
1745 dh = DSA_dup_DH(dsa);
1746 DSA_free(dsa);
1747 if (dh == NULL) {
1748 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
1749 "params into DH params");
1750 break;
1751 }
1752 break;
1753 }
1754 #endif /* !OPENSSL_NO_DSA */
1755 if (dh == NULL) {
1756 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
1757 "'%s'", dh_file);
1758 return -1;
1759 }
1760
1761 if (SSL_set_tmp_dh(conn->ssl, dh) != 1) {
1762 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
1763 "%s", dh_file,
1764 ERR_error_string(ERR_get_error(), NULL));
1765 DH_free(dh);
1766 return -1;
1767 }
1768 DH_free(dh);
1769 return 0;
1770 #endif /* OPENSSL_NO_DH */
1771 }
1772
1773
1774 int tls_connection_get_keys(void *ssl_ctx, struct tls_connection *conn,
1775 struct tls_keys *keys)
1776 {
1777 SSL *ssl;
1778
1779 if (conn == NULL || keys == NULL)
1780 return -1;
1781 ssl = conn->ssl;
1782 if (ssl == NULL || ssl->s3 == NULL || ssl->session == NULL)
1783 return -1;
1784
1785 os_memset(keys, 0, sizeof(*keys));
1786 keys->master_key = ssl->session->master_key;
1787 keys->master_key_len = ssl->session->master_key_length;
1788 keys->client_random = ssl->s3->client_random;
1789 keys->client_random_len = SSL3_RANDOM_SIZE;
1790 keys->server_random = ssl->s3->server_random;
1791 keys->server_random_len = SSL3_RANDOM_SIZE;
1792
1793 return 0;
1794 }
1795
1796
1797 int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
1798 const char *label, int server_random_first,
1799 u8 *out, size_t out_len)
1800 {
1801 return -1;
1802 }
1803
1804
1805 u8 * tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn,
1806 const u8 *in_data, size_t in_len,
1807 size_t *out_len, u8 **appl_data,
1808 size_t *appl_data_len)
1809 {
1810 int res;
1811 u8 *out_data;
1812
1813 if (appl_data)
1814 *appl_data = NULL;
1815
1816 /*
1817 * Give TLS handshake data from the server (if available) to OpenSSL
1818 * for processing.
1819 */
1820 if (in_data &&
1821 BIO_write(conn->ssl_in, in_data, in_len) < 0) {
1822 tls_show_errors(MSG_INFO, __func__,
1823 "Handshake failed - BIO_write");
1824 return NULL;
1825 }
1826
1827 /* Initiate TLS handshake or continue the existing handshake */
1828 res = SSL_connect(conn->ssl);
1829 if (res != 1) {
1830 int err = SSL_get_error(conn->ssl, res);
1831 if (err == SSL_ERROR_WANT_READ)
1832 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want "
1833 "more data");
1834 else if (err == SSL_ERROR_WANT_WRITE)
1835 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to "
1836 "write");
1837 else {
1838 tls_show_errors(MSG_INFO, __func__, "SSL_connect");
1839 conn->failed++;
1840 }
1841 }
1842
1843 /* Get the TLS handshake data to be sent to the server */
1844 res = BIO_ctrl_pending(conn->ssl_out);
1845 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
1846 out_data = os_malloc(res == 0 ? 1 : res);
1847 if (out_data == NULL) {
1848 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
1849 "handshake output (%d bytes)", res);
1850 if (BIO_reset(conn->ssl_out) < 0) {
1851 tls_show_errors(MSG_INFO, __func__,
1852 "BIO_reset failed");
1853 }
1854 *out_len = 0;
1855 return NULL;
1856 }
1857 res = res == 0 ? 0 : BIO_read(conn->ssl_out, out_data, res);
1858 if (res < 0) {
1859 tls_show_errors(MSG_INFO, __func__,
1860 "Handshake failed - BIO_read");
1861 if (BIO_reset(conn->ssl_out) < 0) {
1862 tls_show_errors(MSG_INFO, __func__,
1863 "BIO_reset failed");
1864 }
1865 *out_len = 0;
1866 return NULL;
1867 }
1868 *out_len = res;
1869
1870 if (SSL_is_init_finished(conn->ssl) && appl_data) {
1871 *appl_data = os_malloc(in_len);
1872 if (*appl_data) {
1873 res = SSL_read(conn->ssl, *appl_data, in_len);
1874 if (res < 0) {
1875 tls_show_errors(MSG_INFO, __func__,
1876 "Failed to read possible "
1877 "Application Data");
1878 os_free(*appl_data);
1879 *appl_data = NULL;
1880 } else {
1881 *appl_data_len = res;
1882 wpa_hexdump_key(MSG_MSGDUMP, "SSL: Application"
1883 " Data in Finish message",
1884 *appl_data, *appl_data_len);
1885 }
1886 }
1887 }
1888
1889 return out_data;
1890 }
1891
1892
1893 u8 * tls_connection_server_handshake(void *ssl_ctx,
1894 struct tls_connection *conn,
1895 const u8 *in_data, size_t in_len,
1896 size_t *out_len)
1897 {
1898 int res;
1899 u8 *out_data;
1900 char buf[10];
1901
1902 if (in_data &&
1903 BIO_write(conn->ssl_in, in_data, in_len) < 0) {
1904 tls_show_errors(MSG_INFO, __func__,
1905 "Handshake failed - BIO_write");
1906 return NULL;
1907 }
1908
1909 res = SSL_read(conn->ssl, buf, sizeof(buf));
1910 if (res >= 0) {
1911 wpa_printf(MSG_DEBUG, "SSL: Unexpected data from SSL_read "
1912 "(res=%d)", res);
1913 }
1914
1915 res = BIO_ctrl_pending(conn->ssl_out);
1916 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
1917 out_data = os_malloc(res == 0 ? 1 : res);
1918 if (out_data == NULL) {
1919 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
1920 "handshake output (%d bytes)", res);
1921 if (BIO_reset(conn->ssl_out) < 0) {
1922 tls_show_errors(MSG_INFO, __func__,
1923 "BIO_reset failed");
1924 }
1925 *out_len = 0;
1926 return NULL;
1927 }
1928 res = res == 0 ? 0 : BIO_read(conn->ssl_out, out_data, res);
1929 if (res < 0) {
1930 tls_show_errors(MSG_INFO, __func__,
1931 "Handshake failed - BIO_read");
1932 if (BIO_reset(conn->ssl_out) < 0) {
1933 tls_show_errors(MSG_INFO, __func__,
1934 "BIO_reset failed");
1935 }
1936 *out_len = 0;
1937 return NULL;
1938 }
1939 *out_len = res;
1940 return out_data;
1941 }
1942
1943
1944 int tls_connection_encrypt(void *ssl_ctx, struct tls_connection *conn,
1945 const u8 *in_data, size_t in_len,
1946 u8 *out_data, size_t out_len)
1947 {
1948 int res;
1949
1950 if (conn == NULL)
1951 return -1;
1952
1953 /* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */
1954 if ((res = BIO_reset(conn->ssl_in)) < 0 ||
1955 (res = BIO_reset(conn->ssl_out)) < 0) {
1956 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
1957 return res;
1958 }
1959 res = SSL_write(conn->ssl, in_data, in_len);
1960 if (res < 0) {
1961 tls_show_errors(MSG_INFO, __func__,
1962 "Encryption failed - SSL_write");
1963 return res;
1964 }
1965
1966 /* Read encrypted data to be sent to the server */
1967 res = BIO_read(conn->ssl_out, out_data, out_len);
1968 if (res < 0) {
1969 tls_show_errors(MSG_INFO, __func__,
1970 "Encryption failed - BIO_read");
1971 return res;
1972 }
1973
1974 return res;
1975 }
1976
1977
1978 int tls_connection_decrypt(void *ssl_ctx, struct tls_connection *conn,
1979 const u8 *in_data, size_t in_len,
1980 u8 *out_data, size_t out_len)
1981 {
1982 int res;
1983
1984 /* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */
1985 res = BIO_write(conn->ssl_in, in_data, in_len);
1986 if (res < 0) {
1987 tls_show_errors(MSG_INFO, __func__,
1988 "Decryption failed - BIO_write");
1989 return res;
1990 }
1991 if (BIO_reset(conn->ssl_out) < 0) {
1992 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
1993 return res;
1994 }
1995
1996 /* Read decrypted data for further processing */
1997 res = SSL_read(conn->ssl, out_data, out_len);
1998 if (res < 0) {
1999 tls_show_errors(MSG_INFO, __func__,
2000 "Decryption failed - SSL_read");
2001 return res;
2002 }
2003
2004 return res;
2005 }
2006
2007
2008 int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn)
2009 {
2010 return conn ? conn->ssl->hit : 0;
2011 }
2012
2013
2014 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC)
2015 /* Pre-shared secred requires a patch to openssl, so this function is
2016 * commented out unless explicitly needed for EAP-FAST in order to be able to
2017 * build this file with unmodified openssl. */
2018
2019 static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
2020 STACK_OF(SSL_CIPHER) *peer_ciphers,
2021 SSL_CIPHER **cipher, void *arg)
2022 {
2023 struct tls_connection *conn = arg;
2024
2025 if (conn == NULL || conn->pre_shared_secret == 0)
2026 return 0;
2027
2028 os_memcpy(secret, conn->pre_shared_secret,
2029 conn->pre_shared_secret_len);
2030 *secret_len = conn->pre_shared_secret_len;
2031
2032 return 1;
2033 }
2034
2035
2036 int tls_connection_set_master_key(void *ssl_ctx, struct tls_connection *conn,
2037 const u8 *key, size_t key_len)
2038 {
2039 if (conn == NULL || key_len > SSL_MAX_MASTER_KEY_LENGTH)
2040 return -1;
2041
2042 os_free(conn->pre_shared_secret);
2043 conn->pre_shared_secret = NULL;
2044 conn->pre_shared_secret_len = 0;
2045
2046 if (key) {
2047 conn->pre_shared_secret = os_malloc(key_len);
2048 if (conn->pre_shared_secret) {
2049 os_memcpy(conn->pre_shared_secret, key, key_len);
2050 conn->pre_shared_secret_len = key_len;
2051 }
2052 if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb,
2053 conn) != 1)
2054 return -1;
2055 } else {
2056 if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1)
2057 return -1;
2058 }
2059
2060 return 0;
2061 }
2062 #endif /* EAP_FAST || EAP_FAST_DYNAMIC */
2063
2064
2065 int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
2066 u8 *ciphers)
2067 {
2068 char buf[100], *pos, *end;
2069 u8 *c;
2070 int ret;
2071
2072 if (conn == NULL || conn->ssl == NULL || ciphers == NULL)
2073 return -1;
2074
2075 buf[0] = '\0';
2076 pos = buf;
2077 end = pos + sizeof(buf);
2078
2079 c = ciphers;
2080 while (*c != TLS_CIPHER_NONE) {
2081 const char *suite;
2082
2083 switch (*c) {
2084 case TLS_CIPHER_RC4_SHA:
2085 suite = "RC4-SHA";
2086 break;
2087 case TLS_CIPHER_AES128_SHA:
2088 suite = "AES128-SHA";
2089 break;
2090 case TLS_CIPHER_RSA_DHE_AES128_SHA:
2091 suite = "DHE-RSA-AES128-SHA";
2092 break;
2093 case TLS_CIPHER_ANON_DH_AES128_SHA:
2094 suite = "ADH-AES128-SHA";
2095 break;
2096 default:
2097 wpa_printf(MSG_DEBUG, "TLS: Unsupported "
2098 "cipher selection: %d", *c);
2099 return -1;
2100 }
2101 ret = os_snprintf(pos, end - pos, ":%s", suite);
2102 if (ret < 0 || ret >= end - pos)
2103 break;
2104 pos += ret;
2105
2106 c++;
2107 }
2108
2109 wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1);
2110
2111 if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) {
2112 tls_show_errors(MSG_INFO, __func__,
2113 "Cipher suite configuration failed");
2114 return -1;
2115 }
2116
2117 return 0;
2118 }
2119
2120
2121 int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn,
2122 char *buf, size_t buflen)
2123 {
2124 const char *name;
2125 if (conn == NULL || conn->ssl == NULL)
2126 return -1;
2127
2128 name = SSL_get_cipher(conn->ssl);
2129 if (name == NULL)
2130 return -1;
2131
2132 os_snprintf(buf, buflen, "%s", name);
2133 buf[buflen - 1] = '\0';
2134 return 0;
2135 }
2136
2137
2138 int tls_connection_enable_workaround(void *ssl_ctx,
2139 struct tls_connection *conn)
2140 {
2141 SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
2142
2143 return 0;
2144 }
2145
2146
2147 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC)
2148 /* ClientHello TLS extensions require a patch to openssl, so this function is
2149 * commented out unless explicitly needed for EAP-FAST in order to be able to
2150 * build this file with unmodified openssl. */
2151 int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn,
2152 int ext_type, const u8 *data,
2153 size_t data_len)
2154 {
2155 if (conn == NULL || conn->ssl == NULL)
2156 return -1;
2157
2158 if (SSL_set_hello_extension(conn->ssl, ext_type, (void *) data,
2159 data_len) != 1)
2160 return -1;
2161
2162 return 0;
2163 }
2164 #endif /* EAP_FAST || EAP_FAST_DYNAMIC */
2165
2166
2167 int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn)
2168 {
2169 if (conn == NULL)
2170 return -1;
2171 return conn->failed;
2172 }
2173
2174
2175 int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn)
2176 {
2177 if (conn == NULL)
2178 return -1;
2179 return conn->read_alerts;
2180 }
2181
2182
2183 int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn)
2184 {
2185 if (conn == NULL)
2186 return -1;
2187 return conn->write_alerts;
2188 }
2189
2190
2191 int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
2192 const struct tls_connection_params *params)
2193 {
2194 int ret;
2195 unsigned long err;
2196
2197 if (conn == NULL)
2198 return -1;
2199
2200 while ((err = ERR_get_error())) {
2201 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
2202 __func__, ERR_error_string(err, NULL));
2203 }
2204
2205 if (tls_connection_set_subject_match(conn,
2206 params->subject_match,
2207 params->altsubject_match))
2208 return -1;
2209 if (tls_connection_ca_cert(tls_ctx, conn, params->ca_cert,
2210 params->ca_cert_blob,
2211 params->ca_cert_blob_len,
2212 params->ca_path))
2213 return -1;
2214 if (tls_connection_client_cert(conn, params->client_cert,
2215 params->client_cert_blob,
2216 params->client_cert_blob_len))
2217 return -1;
2218
2219 if (params->engine) {
2220 wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine");
2221 ret = tls_engine_init(conn, params->engine_id, params->pin,
2222 params->key_id);
2223 if (ret)
2224 return ret;
2225 if (tls_connection_engine_private_key(conn))
2226 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
2227 } else if (tls_connection_private_key(tls_ctx, conn,
2228 params->private_key,
2229 params->private_key_passwd,
2230 params->private_key_blob,
2231 params->private_key_blob_len)) {
2232 wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'",
2233 params->private_key);
2234 return -1;
2235 }
2236
2237 if (tls_connection_dh(conn, params->dh_file)) {
2238 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
2239 params->dh_file);
2240 return -1;
2241 }
2242
2243 tls_get_errors(tls_ctx);
2244
2245 return 0;
2246 }
2247
2248
2249 int tls_global_set_params(void *tls_ctx,
2250 const struct tls_connection_params *params)
2251 {
2252 SSL_CTX *ssl_ctx = tls_ctx;
2253 unsigned long err;
2254
2255 while ((err = ERR_get_error())) {
2256 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
2257 __func__, ERR_error_string(err, NULL));
2258 }
2259
2260 if (tls_global_ca_cert(ssl_ctx, params->ca_cert))
2261 return -1;
2262
2263 if (tls_global_client_cert(ssl_ctx, params->client_cert))
2264 return -1;
2265
2266 if (tls_global_private_key(ssl_ctx, params->private_key,
2267 params->private_key_passwd))
2268 return -1;
2269
2270 return 0;
2271 }
2272
2273
2274 int tls_connection_get_keyblock_size(void *tls_ctx,
2275 struct tls_connection *conn)
2276 {
2277 const EVP_CIPHER *c;
2278 const EVP_MD *h;
2279
2280 if (conn == NULL || conn->ssl == NULL ||
2281 conn->ssl->enc_read_ctx == NULL ||
2282 conn->ssl->enc_read_ctx->cipher == NULL ||
2283 conn->ssl->read_hash == NULL)
2284 return -1;
2285
2286 c = conn->ssl->enc_read_ctx->cipher;
2287 #if OPENSSL_VERSION_NUMBER >= 0x00909000L
2288 h = EVP_MD_CTX_md(conn->ssl->read_hash);
2289 #else
2290 h = conn->ssl->read_hash;
2291 #endif
2292
2293 return 2 * (EVP_CIPHER_key_length(c) +
2294 EVP_MD_size(h) +
2295 EVP_CIPHER_iv_length(c));
2296 }
2297
2298
2299 unsigned int tls_capabilities(void *tls_ctx)
2300 {
2301 return 0;
2302 }
2303
2304
2305 int tls_connection_set_ia(void *tls_ctx, struct tls_connection *conn,
2306 int tls_ia)
2307 {
2308 return -1;
2309 }
2310
2311
2312 int tls_connection_ia_send_phase_finished(void *tls_ctx,
2313 struct tls_connection *conn,
2314 int final,
2315 u8 *out_data, size_t out_len)
2316 {
2317 return -1;
2318 }
2319
2320
2321 int tls_connection_ia_final_phase_finished(void *tls_ctx,
2322 struct tls_connection *conn)
2323 {
2324 return -1;
2325 }
2326
2327
2328 int tls_connection_ia_permute_inner_secret(void *tls_ctx,
2329 struct tls_connection *conn,
2330 const u8 *key, size_t key_len)
2331 {
2332 return -1;
2333 }
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