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Expand PMF_FN_* macros.
[netbsd-mini2440.git] / dist / wpa / src / crypto / tls_openssl.c
blobf5b1b984749797acc855444d906d8cd33faf5452
1 /*
2 * WPA Supplicant / SSL/TLS interface functions for openssl
3 * Copyright (c) 2004-2007, 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 tls_session_ticket_cb session_ticket_cb;
53 void *session_ticket_cb_ctx;
54
55 /* SessionTicket received from OpenSSL hello_extension_cb (server) */
56 u8 *session_ticket;
57 size_t session_ticket_len;
58 };
59
60
61 #ifdef CONFIG_NO_STDOUT_DEBUG
62
63 static void _tls_show_errors(void)
64 {
65 unsigned long err;
66
67 while ((err = ERR_get_error())) {
68 /* Just ignore the errors, since stdout is disabled */
69 }
70 }
71 #define tls_show_errors(l, f, t) _tls_show_errors()
72
73 #else /* CONFIG_NO_STDOUT_DEBUG */
74
75 static void tls_show_errors(int level, const char *func, const char *txt)
76 {
77 unsigned long err;
78
79 wpa_printf(level, "OpenSSL: %s - %s %s",
80 func, txt, ERR_error_string(ERR_get_error(), NULL));
81
82 while ((err = ERR_get_error())) {
83 wpa_printf(MSG_INFO, "OpenSSL: pending error: %s",
84 ERR_error_string(err, NULL));
85 }
86 }
87
88 #endif /* CONFIG_NO_STDOUT_DEBUG */
89
90
91 #ifdef CONFIG_NATIVE_WINDOWS
92
93 /* Windows CryptoAPI and access to certificate stores */
94 #include <wincrypt.h>
95
96 #ifdef __MINGW32_VERSION
97 /*
98 * MinGW does not yet include all the needed definitions for CryptoAPI, so
99 * define here whatever extra is needed.
100 */
101 #define CALG_SSL3_SHAMD5 (ALG_CLASS_HASH | ALG_TYPE_ANY | ALG_SID_SSL3SHAMD5)
102 #define CERT_SYSTEM_STORE_CURRENT_USER (1 << 16)
103 #define CERT_STORE_READONLY_FLAG 0x00008000
104 #define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000
105 #define CRYPT_ACQUIRE_COMPARE_KEY_FLAG 0x00000004
106
107 static BOOL WINAPI
108 (*CryptAcquireCertificatePrivateKey)(PCCERT_CONTEXT pCert, DWORD dwFlags,
109 void *pvReserved, HCRYPTPROV *phCryptProv,
110 DWORD *pdwKeySpec, BOOL *pfCallerFreeProv)
111 = NULL; /* to be loaded from crypt32.dll */
112
113 static PCCERT_CONTEXT WINAPI
114 (*CertEnumCertificatesInStore)(HCERTSTORE hCertStore,
115 PCCERT_CONTEXT pPrevCertContext)
116 = NULL; /* to be loaded from crypt32.dll */
117
118 static int mingw_load_crypto_func(void)
119 {
120 HINSTANCE dll;
121
122 /* MinGW does not yet have full CryptoAPI support, so load the needed
123 * function here. */
124
125 if (CryptAcquireCertificatePrivateKey)
126 return 0;
127
128 dll = LoadLibrary("crypt32");
129 if (dll == NULL) {
130 wpa_printf(MSG_DEBUG, "CryptoAPI: Could not load crypt32 "
131 "library");
132 return -1;
133 }
134
135 CryptAcquireCertificatePrivateKey = GetProcAddress(
136 dll, "CryptAcquireCertificatePrivateKey");
137 if (CryptAcquireCertificatePrivateKey == NULL) {
138 wpa_printf(MSG_DEBUG, "CryptoAPI: Could not get "
139 "CryptAcquireCertificatePrivateKey() address from "
140 "crypt32 library");
141 return -1;
142 }
143
144 CertEnumCertificatesInStore = (void *) GetProcAddress(
145 dll, "CertEnumCertificatesInStore");
146 if (CertEnumCertificatesInStore == NULL) {
147 wpa_printf(MSG_DEBUG, "CryptoAPI: Could not get "
148 "CertEnumCertificatesInStore() address from "
149 "crypt32 library");
150 return -1;
151 }
152
153 return 0;
154 }
155
156 #else /* __MINGW32_VERSION */
157
158 static int mingw_load_crypto_func(void)
159 {
160 return 0;
161 }
162
163 #endif /* __MINGW32_VERSION */
164
165
166 struct cryptoapi_rsa_data {
167 const CERT_CONTEXT *cert;
168 HCRYPTPROV crypt_prov;
169 DWORD key_spec;
170 BOOL free_crypt_prov;
171 };
172
173
174 static void cryptoapi_error(const char *msg)
175 {
176 wpa_printf(MSG_INFO, "CryptoAPI: %s; err=%u",
177 msg, (unsigned int) GetLastError());
178 }
179
180
181 static int cryptoapi_rsa_pub_enc(int flen, const unsigned char *from,
182 unsigned char *to, RSA *rsa, int padding)
183 {
184 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
185 return 0;
186 }
187
188
189 static int cryptoapi_rsa_pub_dec(int flen, const unsigned char *from,
190 unsigned char *to, RSA *rsa, int padding)
191 {
192 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
193 return 0;
194 }
195
196
197 static int cryptoapi_rsa_priv_enc(int flen, const unsigned char *from,
198 unsigned char *to, RSA *rsa, int padding)
199 {
200 struct cryptoapi_rsa_data *priv =
201 (struct cryptoapi_rsa_data *) rsa->meth->app_data;
202 HCRYPTHASH hash;
203 DWORD hash_size, len, i;
204 unsigned char *buf = NULL;
205 int ret = 0;
206
207 if (priv == NULL) {
208 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
209 ERR_R_PASSED_NULL_PARAMETER);
210 return 0;
211 }
212
213 if (padding != RSA_PKCS1_PADDING) {
214 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
215 RSA_R_UNKNOWN_PADDING_TYPE);
216 return 0;
217 }
218
219 if (flen != 16 /* MD5 */ + 20 /* SHA-1 */) {
220 wpa_printf(MSG_INFO, "%s - only MD5-SHA1 hash supported",
221 __func__);
222 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
223 RSA_R_INVALID_MESSAGE_LENGTH);
224 return 0;
225 }
226
227 if (!CryptCreateHash(priv->crypt_prov, CALG_SSL3_SHAMD5, 0, 0, &hash))
228 {
229 cryptoapi_error("CryptCreateHash failed");
230 return 0;
231 }
232
233 len = sizeof(hash_size);
234 if (!CryptGetHashParam(hash, HP_HASHSIZE, (BYTE *) &hash_size, &len,
235 0)) {
236 cryptoapi_error("CryptGetHashParam failed");
237 goto err;
238 }
239
240 if ((int) hash_size != flen) {
241 wpa_printf(MSG_INFO, "CryptoAPI: Invalid hash size (%u != %d)",
242 (unsigned) hash_size, flen);
243 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
244 RSA_R_INVALID_MESSAGE_LENGTH);
245 goto err;
246 }
247 if (!CryptSetHashParam(hash, HP_HASHVAL, (BYTE * ) from, 0)) {
248 cryptoapi_error("CryptSetHashParam failed");
249 goto err;
250 }
251
252 len = RSA_size(rsa);
253 buf = os_malloc(len);
254 if (buf == NULL) {
255 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_MALLOC_FAILURE);
256 goto err;
257 }
258
259 if (!CryptSignHash(hash, priv->key_spec, NULL, 0, buf, &len)) {
260 cryptoapi_error("CryptSignHash failed");
261 goto err;
262 }
263
264 for (i = 0; i < len; i++)
265 to[i] = buf[len - i - 1];
266 ret = len;
267
268 err:
269 os_free(buf);
270 CryptDestroyHash(hash);
271
272 return ret;
273 }
274
275
276 static int cryptoapi_rsa_priv_dec(int flen, const unsigned char *from,
277 unsigned char *to, RSA *rsa, int padding)
278 {
279 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
280 return 0;
281 }
282
283
284 static void cryptoapi_free_data(struct cryptoapi_rsa_data *priv)
285 {
286 if (priv == NULL)
287 return;
288 if (priv->crypt_prov && priv->free_crypt_prov)
289 CryptReleaseContext(priv->crypt_prov, 0);
290 if (priv->cert)
291 CertFreeCertificateContext(priv->cert);
292 os_free(priv);
293 }
294
295
296 static int cryptoapi_finish(RSA *rsa)
297 {
298 cryptoapi_free_data((struct cryptoapi_rsa_data *) rsa->meth->app_data);
299 os_free((void *) rsa->meth);
300 rsa->meth = NULL;
301 return 1;
302 }
303
304
305 static const CERT_CONTEXT * cryptoapi_find_cert(const char *name, DWORD store)
306 {
307 HCERTSTORE cs;
308 const CERT_CONTEXT *ret = NULL;
309
310 cs = CertOpenStore((LPCSTR) CERT_STORE_PROV_SYSTEM, 0, 0,
311 store | CERT_STORE_OPEN_EXISTING_FLAG |
312 CERT_STORE_READONLY_FLAG, L"MY");
313 if (cs == NULL) {
314 cryptoapi_error("Failed to open 'My system store'");
315 return NULL;
316 }
317
318 if (strncmp(name, "cert://", 7) == 0) {
319 unsigned short wbuf[255];
320 MultiByteToWideChar(CP_ACP, 0, name + 7, -1, wbuf, 255);
321 ret = CertFindCertificateInStore(cs, X509_ASN_ENCODING |
322 PKCS_7_ASN_ENCODING,
323 0, CERT_FIND_SUBJECT_STR,
324 wbuf, NULL);
325 } else if (strncmp(name, "hash://", 7) == 0) {
326 CRYPT_HASH_BLOB blob;
327 int len;
328 const char *hash = name + 7;
329 unsigned char *buf;
330
331 len = os_strlen(hash) / 2;
332 buf = os_malloc(len);
333 if (buf && hexstr2bin(hash, buf, len) == 0) {
334 blob.cbData = len;
335 blob.pbData = buf;
336 ret = CertFindCertificateInStore(cs,
337 X509_ASN_ENCODING |
338 PKCS_7_ASN_ENCODING,
339 0, CERT_FIND_HASH,
340 &blob, NULL);
341 }
342 os_free(buf);
343 }
344
345 CertCloseStore(cs, 0);
346
347 return ret;
348 }
349
350
351 static int tls_cryptoapi_cert(SSL *ssl, const char *name)
352 {
353 X509 *cert = NULL;
354 RSA *rsa = NULL, *pub_rsa;
355 struct cryptoapi_rsa_data *priv;
356 RSA_METHOD *rsa_meth;
357
358 if (name == NULL ||
359 (strncmp(name, "cert://", 7) != 0 &&
360 strncmp(name, "hash://", 7) != 0))
361 return -1;
362
363 priv = os_zalloc(sizeof(*priv));
364 rsa_meth = os_zalloc(sizeof(*rsa_meth));
365 if (priv == NULL || rsa_meth == NULL) {
366 wpa_printf(MSG_WARNING, "CryptoAPI: Failed to allocate memory "
367 "for CryptoAPI RSA method");
368 os_free(priv);
369 os_free(rsa_meth);
370 return -1;
371 }
372
373 priv->cert = cryptoapi_find_cert(name, CERT_SYSTEM_STORE_CURRENT_USER);
374 if (priv->cert == NULL) {
375 priv->cert = cryptoapi_find_cert(
376 name, CERT_SYSTEM_STORE_LOCAL_MACHINE);
377 }
378 if (priv->cert == NULL) {
379 wpa_printf(MSG_INFO, "CryptoAPI: Could not find certificate "
380 "'%s'", name);
381 goto err;
382 }
383
384 cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &priv->cert->pbCertEncoded,
385 priv->cert->cbCertEncoded);
386 if (cert == NULL) {
387 wpa_printf(MSG_INFO, "CryptoAPI: Could not process X509 DER "
388 "encoding");
389 goto err;
390 }
391
392 if (mingw_load_crypto_func())
393 goto err;
394
395 if (!CryptAcquireCertificatePrivateKey(priv->cert,
396 CRYPT_ACQUIRE_COMPARE_KEY_FLAG,
397 NULL, &priv->crypt_prov,
398 &priv->key_spec,
399 &priv->free_crypt_prov)) {
400 cryptoapi_error("Failed to acquire a private key for the "
401 "certificate");
402 goto err;
403 }
404
405 rsa_meth->name = "Microsoft CryptoAPI RSA Method";
406 rsa_meth->rsa_pub_enc = cryptoapi_rsa_pub_enc;
407 rsa_meth->rsa_pub_dec = cryptoapi_rsa_pub_dec;
408 rsa_meth->rsa_priv_enc = cryptoapi_rsa_priv_enc;
409 rsa_meth->rsa_priv_dec = cryptoapi_rsa_priv_dec;
410 rsa_meth->finish = cryptoapi_finish;
411 rsa_meth->flags = RSA_METHOD_FLAG_NO_CHECK;
412 rsa_meth->app_data = (char *) priv;
413
414 rsa = RSA_new();
415 if (rsa == NULL) {
416 SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE,
417 ERR_R_MALLOC_FAILURE);
418 goto err;
419 }
420
421 if (!SSL_use_certificate(ssl, cert)) {
422 RSA_free(rsa);
423 rsa = NULL;
424 goto err;
425 }
426 pub_rsa = cert->cert_info->key->pkey->pkey.rsa;
427 X509_free(cert);
428 cert = NULL;
429
430 rsa->n = BN_dup(pub_rsa->n);
431 rsa->e = BN_dup(pub_rsa->e);
432 if (!RSA_set_method(rsa, rsa_meth))
433 goto err;
434
435 if (!SSL_use_RSAPrivateKey(ssl, rsa))
436 goto err;
437 RSA_free(rsa);
438
439 return 0;
440
441 err:
442 if (cert)
443 X509_free(cert);
444 if (rsa)
445 RSA_free(rsa);
446 else {
447 os_free(rsa_meth);
448 cryptoapi_free_data(priv);
449 }
450 return -1;
451 }
452
453
454 static int tls_cryptoapi_ca_cert(SSL_CTX *ssl_ctx, SSL *ssl, const char *name)
455 {
456 HCERTSTORE cs;
457 PCCERT_CONTEXT ctx = NULL;
458 X509 *cert;
459 char buf[128];
460 const char *store;
461 #ifdef UNICODE
462 WCHAR *wstore;
463 #endif /* UNICODE */
464
465 if (mingw_load_crypto_func())
466 return -1;
467
468 if (name == NULL || strncmp(name, "cert_store://", 13) != 0)
469 return -1;
470
471 store = name + 13;
472 #ifdef UNICODE
473 wstore = os_malloc((os_strlen(store) + 1) * sizeof(WCHAR));
474 if (wstore == NULL)
475 return -1;
476 wsprintf(wstore, L"%S", store);
477 cs = CertOpenSystemStore(0, wstore);
478 os_free(wstore);
479 #else /* UNICODE */
480 cs = CertOpenSystemStore(0, store);
481 #endif /* UNICODE */
482 if (cs == NULL) {
483 wpa_printf(MSG_DEBUG, "%s: failed to open system cert store "
484 "'%s': error=%d", __func__, store,
485 (int) GetLastError());
486 return -1;
487 }
488
489 while ((ctx = CertEnumCertificatesInStore(cs, ctx))) {
490 cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ctx->pbCertEncoded,
491 ctx->cbCertEncoded);
492 if (cert == NULL) {
493 wpa_printf(MSG_INFO, "CryptoAPI: Could not process "
494 "X509 DER encoding for CA cert");
495 continue;
496 }
497
498 X509_NAME_oneline(X509_get_subject_name(cert), buf,
499 sizeof(buf));
500 wpa_printf(MSG_DEBUG, "OpenSSL: Loaded CA certificate for "
501 "system certificate store: subject='%s'", buf);
502
503 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
504 tls_show_errors(MSG_WARNING, __func__,
505 "Failed to add ca_cert to OpenSSL "
506 "certificate store");
507 }
508
509 X509_free(cert);
510 }
511
512 if (!CertCloseStore(cs, 0)) {
513 wpa_printf(MSG_DEBUG, "%s: failed to close system cert store "
514 "'%s': error=%d", __func__, name + 13,
515 (int) GetLastError());
516 }
517
518 return 0;
519 }
520
521
522 #else /* CONFIG_NATIVE_WINDOWS */
523
524 static int tls_cryptoapi_cert(SSL *ssl, const char *name)
525 {
526 return -1;
527 }
528
529 #endif /* CONFIG_NATIVE_WINDOWS */
530
531
532 static void ssl_info_cb(const SSL *ssl, int where, int ret)
533 {
534 const char *str;
535 int w;
536
537 wpa_printf(MSG_DEBUG, "SSL: (where=0x%x ret=0x%x)", where, ret);
538 w = where & ~SSL_ST_MASK;
539 if (w & SSL_ST_CONNECT)
540 str = "SSL_connect";
541 else if (w & SSL_ST_ACCEPT)
542 str = "SSL_accept";
543 else
544 str = "undefined";
545
546 if (where & SSL_CB_LOOP) {
547 wpa_printf(MSG_DEBUG, "SSL: %s:%s",
548 str, SSL_state_string_long(ssl));
549 } else if (where & SSL_CB_ALERT) {
550 wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s",
551 where & SSL_CB_READ ?
552 "read (remote end reported an error)" :
553 "write (local SSL3 detected an error)",
554 SSL_alert_type_string_long(ret),
555 SSL_alert_desc_string_long(ret));
556 if ((ret >> 8) == SSL3_AL_FATAL) {
557 struct tls_connection *conn =
558 SSL_get_app_data((SSL *) ssl);
559 if (where & SSL_CB_READ)
560 conn->read_alerts++;
561 else
562 conn->write_alerts++;
563 }
564 } else if (where & SSL_CB_EXIT && ret <= 0) {
565 wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s",
566 str, ret == 0 ? "failed" : "error",
567 SSL_state_string_long(ssl));
568 }
569 }
570
571
572 #ifndef OPENSSL_NO_ENGINE
573 /**
574 * tls_engine_load_dynamic_generic - load any openssl engine
575 * @pre: an array of commands and values that load an engine initialized
576 * in the engine specific function
577 * @post: an array of commands and values that initialize an already loaded
578 * engine (or %NULL if not required)
579 * @id: the engine id of the engine to load (only required if post is not %NULL
580 *
581 * This function is a generic function that loads any openssl engine.
582 *
583 * Returns: 0 on success, -1 on failure
584 */
585 static int tls_engine_load_dynamic_generic(const char *pre[],
586 const char *post[], const char *id)
587 {
588 ENGINE *engine;
589 const char *dynamic_id = "dynamic";
590
591 engine = ENGINE_by_id(id);
592 if (engine) {
593 ENGINE_free(engine);
594 wpa_printf(MSG_DEBUG, "ENGINE: engine '%s' is already "
595 "available", id);
596 return 0;
597 }
598 ERR_clear_error();
599
600 engine = ENGINE_by_id(dynamic_id);
601 if (engine == NULL) {
602 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
603 dynamic_id,
604 ERR_error_string(ERR_get_error(), NULL));
605 return -1;
606 }
607
608 /* Perform the pre commands. This will load the engine. */
609 while (pre && pre[0]) {
610 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", pre[0], pre[1]);
611 if (ENGINE_ctrl_cmd_string(engine, pre[0], pre[1], 0) == 0) {
612 wpa_printf(MSG_INFO, "ENGINE: ctrl cmd_string failed: "
613 "%s %s [%s]", pre[0], pre[1],
614 ERR_error_string(ERR_get_error(), NULL));
615 ENGINE_free(engine);
616 return -1;
617 }
618 pre += 2;
619 }
620
621 /*
622 * Free the reference to the "dynamic" engine. The loaded engine can
623 * now be looked up using ENGINE_by_id().
624 */
625 ENGINE_free(engine);
626
627 engine = ENGINE_by_id(id);
628 if (engine == NULL) {
629 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
630 id, ERR_error_string(ERR_get_error(), NULL));
631 return -1;
632 }
633
634 while (post && post[0]) {
635 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", post[0], post[1]);
636 if (ENGINE_ctrl_cmd_string(engine, post[0], post[1], 0) == 0) {
637 wpa_printf(MSG_DEBUG, "ENGINE: ctrl cmd_string failed:"
638 " %s %s [%s]", post[0], post[1],
639 ERR_error_string(ERR_get_error(), NULL));
640 ENGINE_remove(engine);
641 ENGINE_free(engine);
642 return -1;
643 }
644 post += 2;
645 }
646 ENGINE_free(engine);
647
648 return 0;
649 }
650
651
652 /**
653 * tls_engine_load_dynamic_pkcs11 - load the pkcs11 engine provided by opensc
654 * @pkcs11_so_path: pksc11_so_path from the configuration
655 * @pcks11_module_path: pkcs11_module_path from the configuration
656 */
657 static int tls_engine_load_dynamic_pkcs11(const char *pkcs11_so_path,
658 const char *pkcs11_module_path)
659 {
660 char *engine_id = "pkcs11";
661 const char *pre_cmd[] = {
662 "SO_PATH", NULL /* pkcs11_so_path */,
663 "ID", NULL /* engine_id */,
664 "LIST_ADD", "1",
665 /* "NO_VCHECK", "1", */
666 "LOAD", NULL,
667 NULL, NULL
668 };
669 const char *post_cmd[] = {
670 "MODULE_PATH", NULL /* pkcs11_module_path */,
671 NULL, NULL
672 };
673
674 if (!pkcs11_so_path || !pkcs11_module_path)
675 return 0;
676
677 pre_cmd[1] = pkcs11_so_path;
678 pre_cmd[3] = engine_id;
679 post_cmd[1] = pkcs11_module_path;
680
681 wpa_printf(MSG_DEBUG, "ENGINE: Loading pkcs11 Engine from %s",
682 pkcs11_so_path);
683
684 return tls_engine_load_dynamic_generic(pre_cmd, post_cmd, engine_id);
685 }
686
687
688 /**
689 * tls_engine_load_dynamic_opensc - load the opensc engine provided by opensc
690 * @opensc_so_path: opensc_so_path from the configuration
691 */
692 static int tls_engine_load_dynamic_opensc(const char *opensc_so_path)
693 {
694 char *engine_id = "opensc";
695 const char *pre_cmd[] = {
696 "SO_PATH", NULL /* opensc_so_path */,
697 "ID", NULL /* engine_id */,
698 "LIST_ADD", "1",
699 "LOAD", NULL,
700 NULL, NULL
701 };
702
703 if (!opensc_so_path)
704 return 0;
705
706 pre_cmd[1] = opensc_so_path;
707 pre_cmd[3] = engine_id;
708
709 wpa_printf(MSG_DEBUG, "ENGINE: Loading OpenSC Engine from %s",
710 opensc_so_path);
711
712 return tls_engine_load_dynamic_generic(pre_cmd, NULL, engine_id);
713 }
714 #endif /* OPENSSL_NO_ENGINE */
715
716
717 void * tls_init(const struct tls_config *conf)
718 {
719 SSL_CTX *ssl;
720
721 if (tls_openssl_ref_count == 0) {
722 SSL_load_error_strings();
723 SSL_library_init();
724 /* TODO: if /dev/urandom is available, PRNG is seeded
725 * automatically. If this is not the case, random data should
726 * be added here. */
727
728 #ifdef PKCS12_FUNCS
729 PKCS12_PBE_add();
730 #endif /* PKCS12_FUNCS */
731 }
732 tls_openssl_ref_count++;
733
734 ssl = SSL_CTX_new(TLSv1_method());
735 if (ssl == NULL)
736 return NULL;
737
738 SSL_CTX_set_info_callback(ssl, ssl_info_cb);
739
740 #ifndef OPENSSL_NO_ENGINE
741 if (conf &&
742 (conf->opensc_engine_path || conf->pkcs11_engine_path ||
743 conf->pkcs11_module_path)) {
744 wpa_printf(MSG_DEBUG, "ENGINE: Loading dynamic engine");
745 ERR_load_ENGINE_strings();
746 ENGINE_load_dynamic();
747
748 if (tls_engine_load_dynamic_opensc(conf->opensc_engine_path) ||
749 tls_engine_load_dynamic_pkcs11(conf->pkcs11_engine_path,
750 conf->pkcs11_module_path)) {
751 tls_deinit(ssl);
752 return NULL;
753 }
754 }
755 #endif /* OPENSSL_NO_ENGINE */
756
757 return ssl;
758 }
759
760
761 void tls_deinit(void *ssl_ctx)
762 {
763 SSL_CTX *ssl = ssl_ctx;
764 SSL_CTX_free(ssl);
765
766 tls_openssl_ref_count--;
767 if (tls_openssl_ref_count == 0) {
768 #ifndef OPENSSL_NO_ENGINE
769 ENGINE_cleanup();
770 #endif /* OPENSSL_NO_ENGINE */
771 CRYPTO_cleanup_all_ex_data();
772 ERR_remove_state(0);
773 ERR_free_strings();
774 EVP_cleanup();
775 }
776 }
777
778
779 static int tls_engine_init(struct tls_connection *conn, const char *engine_id,
780 const char *pin, const char *key_id,
781 const char *cert_id, const char *ca_cert_id)
782 {
783 #ifndef OPENSSL_NO_ENGINE
784 int ret = -1;
785 if (engine_id == NULL) {
786 wpa_printf(MSG_ERROR, "ENGINE: Engine ID not set");
787 return -1;
788 }
789 if (pin == NULL) {
790 wpa_printf(MSG_ERROR, "ENGINE: Smartcard PIN not set");
791 return -1;
792 }
793 if (key_id == NULL) {
794 wpa_printf(MSG_ERROR, "ENGINE: Key Id not set");
795 return -1;
796 }
797
798 ERR_clear_error();
799 conn->engine = ENGINE_by_id(engine_id);
800 if (!conn->engine) {
801 wpa_printf(MSG_ERROR, "ENGINE: engine %s not available [%s]",
802 engine_id, ERR_error_string(ERR_get_error(), NULL));
803 goto err;
804 }
805 if (ENGINE_init(conn->engine) != 1) {
806 wpa_printf(MSG_ERROR, "ENGINE: engine init failed "
807 "(engine: %s) [%s]", engine_id,
808 ERR_error_string(ERR_get_error(), NULL));
809 goto err;
810 }
811 wpa_printf(MSG_DEBUG, "ENGINE: engine initialized");
812
813 if (ENGINE_ctrl_cmd_string(conn->engine, "PIN", pin, 0) == 0) {
814 wpa_printf(MSG_ERROR, "ENGINE: cannot set pin [%s]",
815 ERR_error_string(ERR_get_error(), NULL));
816 goto err;
817 }
818 /* load private key first in-case PIN is required for cert */
819 conn->private_key = ENGINE_load_private_key(conn->engine,
820 key_id, NULL, NULL);
821 if (!conn->private_key) {
822 wpa_printf(MSG_ERROR, "ENGINE: cannot load private key with id"
823 " '%s' [%s]", key_id,
824 ERR_error_string(ERR_get_error(), NULL));
825 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
826 goto err;
827 }
828
829 /* handle a certificate and/or CA certificate */
830 if (cert_id || ca_cert_id) {
831 const char *cmd_name = "LOAD_CERT_CTRL";
832
833 /* test if the engine supports a LOAD_CERT_CTRL */
834 if (!ENGINE_ctrl(conn->engine, ENGINE_CTRL_GET_CMD_FROM_NAME,
835 0, (void *)cmd_name, NULL)) {
836 wpa_printf(MSG_ERROR, "ENGINE: engine does not support"
837 " loading certificates");
838 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
839 goto err;
840 }
841 }
842
843 return 0;
844
845 err:
846 if (conn->engine) {
847 ENGINE_free(conn->engine);
848 conn->engine = NULL;
849 }
850
851 if (conn->private_key) {
852 EVP_PKEY_free(conn->private_key);
853 conn->private_key = NULL;
854 }
855
856 return ret;
857 #else /* OPENSSL_NO_ENGINE */
858 return 0;
859 #endif /* OPENSSL_NO_ENGINE */
860 }
861
862
863 static void tls_engine_deinit(struct tls_connection *conn)
864 {
865 #ifndef OPENSSL_NO_ENGINE
866 wpa_printf(MSG_DEBUG, "ENGINE: engine deinit");
867 if (conn->private_key) {
868 EVP_PKEY_free(conn->private_key);
869 conn->private_key = NULL;
870 }
871 if (conn->engine) {
872 ENGINE_finish(conn->engine);
873 conn->engine = NULL;
874 }
875 #endif /* OPENSSL_NO_ENGINE */
876 }
877
878
879 int tls_get_errors(void *ssl_ctx)
880 {
881 int count = 0;
882 unsigned long err;
883
884 while ((err = ERR_get_error())) {
885 wpa_printf(MSG_INFO, "TLS - SSL error: %s",
886 ERR_error_string(err, NULL));
887 count++;
888 }
889
890 return count;
891 }
892
893 struct tls_connection * tls_connection_init(void *ssl_ctx)
894 {
895 SSL_CTX *ssl = ssl_ctx;
896 struct tls_connection *conn;
897 long options;
898
899 conn = os_zalloc(sizeof(*conn));
900 if (conn == NULL)
901 return NULL;
902 conn->ssl = SSL_new(ssl);
903 if (conn->ssl == NULL) {
904 tls_show_errors(MSG_INFO, __func__,
905 "Failed to initialize new SSL connection");
906 os_free(conn);
907 return NULL;
908 }
909
910 SSL_set_app_data(conn->ssl, conn);
911 options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 |
912 SSL_OP_SINGLE_DH_USE;
913 #ifdef SSL_OP_NO_COMPRESSION
914 options |= SSL_OP_NO_COMPRESSION;
915 #endif /* SSL_OP_NO_COMPRESSION */
916 SSL_set_options(conn->ssl, options);
917
918 conn->ssl_in = BIO_new(BIO_s_mem());
919 if (!conn->ssl_in) {
920 tls_show_errors(MSG_INFO, __func__,
921 "Failed to create a new BIO for ssl_in");
922 SSL_free(conn->ssl);
923 os_free(conn);
924 return NULL;
925 }
926
927 conn->ssl_out = BIO_new(BIO_s_mem());
928 if (!conn->ssl_out) {
929 tls_show_errors(MSG_INFO, __func__,
930 "Failed to create a new BIO for ssl_out");
931 SSL_free(conn->ssl);
932 BIO_free(conn->ssl_in);
933 os_free(conn);
934 return NULL;
935 }
936
937 SSL_set_bio(conn->ssl, conn->ssl_in, conn->ssl_out);
938
939 return conn;
940 }
941
942
943 void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn)
944 {
945 if (conn == NULL)
946 return;
947 SSL_free(conn->ssl);
948 tls_engine_deinit(conn);
949 os_free(conn->subject_match);
950 os_free(conn->altsubject_match);
951 os_free(conn->session_ticket);
952 os_free(conn);
953 }
954
955
956 int tls_connection_established(void *ssl_ctx, struct tls_connection *conn)
957 {
958 return conn ? SSL_is_init_finished(conn->ssl) : 0;
959 }
960
961
962 int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn)
963 {
964 if (conn == NULL)
965 return -1;
966
967 /* Shutdown previous TLS connection without notifying the peer
968 * because the connection was already terminated in practice
969 * and "close notify" shutdown alert would confuse AS. */
970 SSL_set_quiet_shutdown(conn->ssl, 1);
971 SSL_shutdown(conn->ssl);
972 return 0;
973 }
974
975
976 static int tls_match_altsubject_component(X509 *cert, int type,
977 const char *value, size_t len)
978 {
979 GENERAL_NAME *gen;
980 void *ext;
981 int i, found = 0;
982
983 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
984
985 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
986 gen = sk_GENERAL_NAME_value(ext, i);
987 if (gen->type != type)
988 continue;
989 if (os_strlen((char *) gen->d.ia5->data) == len &&
990 os_memcmp(value, gen->d.ia5->data, len) == 0)
991 found++;
992 }
993
994 return found;
995 }
996
997
998 static int tls_match_altsubject(X509 *cert, const char *match)
999 {
1000 int type;
1001 const char *pos, *end;
1002 size_t len;
1003
1004 pos = match;
1005 do {
1006 if (os_strncmp(pos, "EMAIL:", 6) == 0) {
1007 type = GEN_EMAIL;
1008 pos += 6;
1009 } else if (os_strncmp(pos, "DNS:", 4) == 0) {
1010 type = GEN_DNS;
1011 pos += 4;
1012 } else if (os_strncmp(pos, "URI:", 4) == 0) {
1013 type = GEN_URI;
1014 pos += 4;
1015 } else {
1016 wpa_printf(MSG_INFO, "TLS: Invalid altSubjectName "
1017 "match '%s'", pos);
1018 return 0;
1019 }
1020 end = os_strchr(pos, ';');
1021 while (end) {
1022 if (os_strncmp(end + 1, "EMAIL:", 6) == 0 ||
1023 os_strncmp(end + 1, "DNS:", 4) == 0 ||
1024 os_strncmp(end + 1, "URI:", 4) == 0)
1025 break;
1026 end = os_strchr(end + 1, ';');
1027 }
1028 if (end)
1029 len = end - pos;
1030 else
1031 len = os_strlen(pos);
1032 if (tls_match_altsubject_component(cert, type, pos, len) > 0)
1033 return 1;
1034 pos = end + 1;
1035 } while (end);
1036
1037 return 0;
1038 }
1039
1040
1041 static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
1042 {
1043 char buf[256];
1044 X509 *err_cert;
1045 int err, depth;
1046 SSL *ssl;
1047 struct tls_connection *conn;
1048 char *match, *altmatch;
1049
1050 err_cert = X509_STORE_CTX_get_current_cert(x509_ctx);
1051 err = X509_STORE_CTX_get_error(x509_ctx);
1052 depth = X509_STORE_CTX_get_error_depth(x509_ctx);
1053 ssl = X509_STORE_CTX_get_ex_data(x509_ctx,
1054 SSL_get_ex_data_X509_STORE_CTX_idx());
1055 X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf));
1056
1057 conn = SSL_get_app_data(ssl);
1058 match = conn ? conn->subject_match : NULL;
1059 altmatch = conn ? conn->altsubject_match : NULL;
1060
1061 if (!preverify_ok) {
1062 wpa_printf(MSG_WARNING, "TLS: Certificate verification failed,"
1063 " error %d (%s) depth %d for '%s'", err,
1064 X509_verify_cert_error_string(err), depth, buf);
1065 } else {
1066 wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - "
1067 "preverify_ok=%d err=%d (%s) depth=%d buf='%s'",
1068 preverify_ok, err,
1069 X509_verify_cert_error_string(err), depth, buf);
1070 if (depth == 0 && match && os_strstr(buf, match) == NULL) {
1071 wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not "
1072 "match with '%s'", buf, match);
1073 preverify_ok = 0;
1074 } else if (depth == 0 && altmatch &&
1075 !tls_match_altsubject(err_cert, altmatch)) {
1076 wpa_printf(MSG_WARNING, "TLS: altSubjectName match "
1077 "'%s' not found", altmatch);
1078 preverify_ok = 0;
1079 }
1080 }
1081
1082 return preverify_ok;
1083 }
1084
1085
1086 #ifndef OPENSSL_NO_STDIO
1087 static int tls_load_ca_der(void *_ssl_ctx, const char *ca_cert)
1088 {
1089 SSL_CTX *ssl_ctx = _ssl_ctx;
1090 X509_LOOKUP *lookup;
1091 int ret = 0;
1092
1093 lookup = X509_STORE_add_lookup(ssl_ctx->cert_store,
1094 X509_LOOKUP_file());
1095 if (lookup == NULL) {
1096 tls_show_errors(MSG_WARNING, __func__,
1097 "Failed add lookup for X509 store");
1098 return -1;
1099 }
1100
1101 if (!X509_LOOKUP_load_file(lookup, ca_cert, X509_FILETYPE_ASN1)) {
1102 unsigned long err = ERR_peek_error();
1103 tls_show_errors(MSG_WARNING, __func__,
1104 "Failed load CA in DER format");
1105 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1106 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1107 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1108 "cert already in hash table error",
1109 __func__);
1110 } else
1111 ret = -1;
1112 }
1113
1114 return ret;
1115 }
1116 #endif /* OPENSSL_NO_STDIO */
1117
1118
1119 static int tls_connection_ca_cert(void *_ssl_ctx, struct tls_connection *conn,
1120 const char *ca_cert, const u8 *ca_cert_blob,
1121 size_t ca_cert_blob_len, const char *ca_path)
1122 {
1123 SSL_CTX *ssl_ctx = _ssl_ctx;
1124
1125 /*
1126 * Remove previously configured trusted CA certificates before adding
1127 * new ones.
1128 */
1129 X509_STORE_free(ssl_ctx->cert_store);
1130 ssl_ctx->cert_store = X509_STORE_new();
1131 if (ssl_ctx->cert_store == NULL) {
1132 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
1133 "certificate store", __func__);
1134 return -1;
1135 }
1136
1137 if (ca_cert_blob) {
1138 X509 *cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ca_cert_blob,
1139 ca_cert_blob_len);
1140 if (cert == NULL) {
1141 tls_show_errors(MSG_WARNING, __func__,
1142 "Failed to parse ca_cert_blob");
1143 return -1;
1144 }
1145
1146 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
1147 unsigned long err = ERR_peek_error();
1148 tls_show_errors(MSG_WARNING, __func__,
1149 "Failed to add ca_cert_blob to "
1150 "certificate store");
1151 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1152 ERR_GET_REASON(err) ==
1153 X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1154 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1155 "cert already in hash table error",
1156 __func__);
1157 } else {
1158 X509_free(cert);
1159 return -1;
1160 }
1161 }
1162 X509_free(cert);
1163 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob "
1164 "to certificate store", __func__);
1165 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1166 return 0;
1167 }
1168
1169 #ifdef CONFIG_NATIVE_WINDOWS
1170 if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) ==
1171 0) {
1172 wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from "
1173 "system certificate store");
1174 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1175 return 0;
1176 }
1177 #endif /* CONFIG_NATIVE_WINDOWS */
1178
1179 if (ca_cert || ca_path) {
1180 #ifndef OPENSSL_NO_STDIO
1181 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) !=
1182 1) {
1183 tls_show_errors(MSG_WARNING, __func__,
1184 "Failed to load root certificates");
1185 if (ca_cert &&
1186 tls_load_ca_der(ssl_ctx, ca_cert) == 0) {
1187 wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded "
1188 "DER format CA certificate",
1189 __func__);
1190 } else
1191 return -1;
1192 } else {
1193 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1194 "certificate(s) loaded");
1195 tls_get_errors(ssl_ctx);
1196 }
1197 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1198 #else /* OPENSSL_NO_STDIO */
1199 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
1200 __func__);
1201 return -1;
1202 #endif /* OPENSSL_NO_STDIO */
1203 } else {
1204 /* No ca_cert configured - do not try to verify server
1205 * certificate */
1206 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
1207 }
1208
1209 return 0;
1210 }
1211
1212
1213 static int tls_global_ca_cert(SSL_CTX *ssl_ctx, const char *ca_cert)
1214 {
1215 if (ca_cert) {
1216 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1)
1217 {
1218 tls_show_errors(MSG_WARNING, __func__,
1219 "Failed to load root certificates");
1220 return -1;
1221 }
1222
1223 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1224 "certificate(s) loaded");
1225
1226 #ifndef OPENSSL_NO_STDIO
1227 /* Add the same CAs to the client certificate requests */
1228 SSL_CTX_set_client_CA_list(ssl_ctx,
1229 SSL_load_client_CA_file(ca_cert));
1230 #endif /* OPENSSL_NO_STDIO */
1231 }
1232
1233 return 0;
1234 }
1235
1236
1237 int tls_global_set_verify(void *ssl_ctx, int check_crl)
1238 {
1239 int flags;
1240
1241 if (check_crl) {
1242 X509_STORE *cs = SSL_CTX_get_cert_store(ssl_ctx);
1243 if (cs == NULL) {
1244 tls_show_errors(MSG_INFO, __func__, "Failed to get "
1245 "certificate store when enabling "
1246 "check_crl");
1247 return -1;
1248 }
1249 flags = X509_V_FLAG_CRL_CHECK;
1250 if (check_crl == 2)
1251 flags |= X509_V_FLAG_CRL_CHECK_ALL;
1252 X509_STORE_set_flags(cs, flags);
1253 }
1254 return 0;
1255 }
1256
1257
1258 static int tls_connection_set_subject_match(struct tls_connection *conn,
1259 const char *subject_match,
1260 const char *altsubject_match)
1261 {
1262 os_free(conn->subject_match);
1263 conn->subject_match = NULL;
1264 if (subject_match) {
1265 conn->subject_match = os_strdup(subject_match);
1266 if (conn->subject_match == NULL)
1267 return -1;
1268 }
1269
1270 os_free(conn->altsubject_match);
1271 conn->altsubject_match = NULL;
1272 if (altsubject_match) {
1273 conn->altsubject_match = os_strdup(altsubject_match);
1274 if (conn->altsubject_match == NULL)
1275 return -1;
1276 }
1277
1278 return 0;
1279 }
1280
1281
1282 int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn,
1283 int verify_peer)
1284 {
1285 static int counter = 0;
1286
1287 if (conn == NULL)
1288 return -1;
1289
1290 if (verify_peer) {
1291 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER |
1292 SSL_VERIFY_FAIL_IF_NO_PEER_CERT |
1293 SSL_VERIFY_CLIENT_ONCE, tls_verify_cb);
1294 } else {
1295 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
1296 }
1297
1298 SSL_set_accept_state(conn->ssl);
1299
1300 /*
1301 * Set session id context in order to avoid fatal errors when client
1302 * tries to resume a session. However, set the context to a unique
1303 * value in order to effectively disable session resumption for now
1304 * since not all areas of the server code are ready for it (e.g.,
1305 * EAP-TTLS needs special handling for Phase 2 after abbreviated TLS
1306 * handshake).
1307 */
1308 counter++;
1309 SSL_set_session_id_context(conn->ssl,
1310 (const unsigned char *) &counter,
1311 sizeof(counter));
1312
1313 return 0;
1314 }
1315
1316
1317 static int tls_connection_client_cert(struct tls_connection *conn,
1318 const char *client_cert,
1319 const u8 *client_cert_blob,
1320 size_t client_cert_blob_len)
1321 {
1322 if (client_cert == NULL && client_cert_blob == NULL)
1323 return 0;
1324
1325 if (client_cert_blob &&
1326 SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob,
1327 client_cert_blob_len) == 1) {
1328 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> "
1329 "OK");
1330 return 0;
1331 } else if (client_cert_blob) {
1332 tls_show_errors(MSG_DEBUG, __func__,
1333 "SSL_use_certificate_ASN1 failed");
1334 }
1335
1336 if (client_cert == NULL)
1337 return -1;
1338
1339 #ifndef OPENSSL_NO_STDIO
1340 if (SSL_use_certificate_file(conn->ssl, client_cert,
1341 SSL_FILETYPE_ASN1) == 1) {
1342 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)"
1343 " --> OK");
1344 return 0;
1345 } else {
1346 tls_show_errors(MSG_DEBUG, __func__,
1347 "SSL_use_certificate_file (DER) failed");
1348 }
1349
1350 if (SSL_use_certificate_file(conn->ssl, client_cert,
1351 SSL_FILETYPE_PEM) == 1) {
1352 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)"
1353 " --> OK");
1354 return 0;
1355 } else {
1356 tls_show_errors(MSG_DEBUG, __func__,
1357 "SSL_use_certificate_file (PEM) failed");
1358 }
1359 #else /* OPENSSL_NO_STDIO */
1360 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1361 #endif /* OPENSSL_NO_STDIO */
1362
1363 return -1;
1364 }
1365
1366
1367 static int tls_global_client_cert(SSL_CTX *ssl_ctx, const char *client_cert)
1368 {
1369 #ifndef OPENSSL_NO_STDIO
1370 if (client_cert == NULL)
1371 return 0;
1372
1373 if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1374 SSL_FILETYPE_ASN1) != 1 &&
1375 SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1376 SSL_FILETYPE_PEM) != 1) {
1377 tls_show_errors(MSG_INFO, __func__,
1378 "Failed to load client certificate");
1379 return -1;
1380 }
1381 return 0;
1382 #else /* OPENSSL_NO_STDIO */
1383 if (client_cert == NULL)
1384 return 0;
1385 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1386 return -1;
1387 #endif /* OPENSSL_NO_STDIO */
1388 }
1389
1390
1391 static int tls_passwd_cb(char *buf, int size, int rwflag, void *password)
1392 {
1393 if (password == NULL) {
1394 return 0;
1395 }
1396 os_strlcpy(buf, (char *) password, size);
1397 return os_strlen(buf);
1398 }
1399
1400
1401 #ifdef PKCS12_FUNCS
1402 static int tls_parse_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, PKCS12 *p12,
1403 const char *passwd)
1404 {
1405 EVP_PKEY *pkey;
1406 X509 *cert;
1407 STACK_OF(X509) *certs;
1408 int res = 0;
1409 char buf[256];
1410
1411 pkey = NULL;
1412 cert = NULL;
1413 certs = NULL;
1414 if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) {
1415 tls_show_errors(MSG_DEBUG, __func__,
1416 "Failed to parse PKCS12 file");
1417 PKCS12_free(p12);
1418 return -1;
1419 }
1420 wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data");
1421
1422 if (cert) {
1423 X509_NAME_oneline(X509_get_subject_name(cert), buf,
1424 sizeof(buf));
1425 wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: "
1426 "subject='%s'", buf);
1427 if (ssl) {
1428 if (SSL_use_certificate(ssl, cert) != 1)
1429 res = -1;
1430 } else {
1431 if (SSL_CTX_use_certificate(ssl_ctx, cert) != 1)
1432 res = -1;
1433 }
1434 X509_free(cert);
1435 }
1436
1437 if (pkey) {
1438 wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12");
1439 if (ssl) {
1440 if (SSL_use_PrivateKey(ssl, pkey) != 1)
1441 res = -1;
1442 } else {
1443 if (SSL_CTX_use_PrivateKey(ssl_ctx, pkey) != 1)
1444 res = -1;
1445 }
1446 EVP_PKEY_free(pkey);
1447 }
1448
1449 if (certs) {
1450 while ((cert = sk_X509_pop(certs)) != NULL) {
1451 X509_NAME_oneline(X509_get_subject_name(cert), buf,
1452 sizeof(buf));
1453 wpa_printf(MSG_DEBUG, "TLS: additional certificate"
1454 " from PKCS12: subject='%s'", buf);
1455 /*
1456 * There is no SSL equivalent for the chain cert - so
1457 * always add it to the context...
1458 */
1459 if (SSL_CTX_add_extra_chain_cert(ssl_ctx, cert) != 1) {
1460 res = -1;
1461 break;
1462 }
1463 }
1464 sk_X509_free(certs);
1465 }
1466
1467 PKCS12_free(p12);
1468
1469 if (res < 0)
1470 tls_get_errors(ssl_ctx);
1471
1472 return res;
1473 }
1474 #endif /* PKCS12_FUNCS */
1475
1476
1477 static int tls_read_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, const char *private_key,
1478 const char *passwd)
1479 {
1480 #ifdef PKCS12_FUNCS
1481 FILE *f;
1482 PKCS12 *p12;
1483
1484 f = fopen(private_key, "rb");
1485 if (f == NULL)
1486 return -1;
1487
1488 p12 = d2i_PKCS12_fp(f, NULL);
1489 fclose(f);
1490
1491 if (p12 == NULL) {
1492 tls_show_errors(MSG_INFO, __func__,
1493 "Failed to use PKCS#12 file");
1494 return -1;
1495 }
1496
1497 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
1498
1499 #else /* PKCS12_FUNCS */
1500 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read "
1501 "p12/pfx files");
1502 return -1;
1503 #endif /* PKCS12_FUNCS */
1504 }
1505
1506
1507 static int tls_read_pkcs12_blob(SSL_CTX *ssl_ctx, SSL *ssl,
1508 const u8 *blob, size_t len, const char *passwd)
1509 {
1510 #ifdef PKCS12_FUNCS
1511 PKCS12 *p12;
1512
1513 p12 = d2i_PKCS12(NULL, (OPENSSL_d2i_TYPE) &blob, len);
1514 if (p12 == NULL) {
1515 tls_show_errors(MSG_INFO, __func__,
1516 "Failed to use PKCS#12 blob");
1517 return -1;
1518 }
1519
1520 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
1521
1522 #else /* PKCS12_FUNCS */
1523 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse "
1524 "p12/pfx blobs");
1525 return -1;
1526 #endif /* PKCS12_FUNCS */
1527 }
1528
1529
1530 #ifndef OPENSSL_NO_ENGINE
1531 static int tls_engine_get_cert(struct tls_connection *conn,
1532 const char *cert_id,
1533 X509 **cert)
1534 {
1535 /* this runs after the private key is loaded so no PIN is required */
1536 struct {
1537 const char *cert_id;
1538 X509 *cert;
1539 } params;
1540 params.cert_id = cert_id;
1541 params.cert = NULL;
1542
1543 if (!ENGINE_ctrl_cmd(conn->engine, "LOAD_CERT_CTRL",
1544 0, &params, NULL, 1)) {
1545 wpa_printf(MSG_ERROR, "ENGINE: cannot load client cert with id"
1546 " '%s' [%s]", cert_id,
1547 ERR_error_string(ERR_get_error(), NULL));
1548 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
1549 }
1550 if (!params.cert) {
1551 wpa_printf(MSG_ERROR, "ENGINE: did not properly cert with id"
1552 " '%s'", cert_id);
1553 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
1554 }
1555 *cert = params.cert;
1556 return 0;
1557 }
1558 #endif /* OPENSSL_NO_ENGINE */
1559
1560
1561 static int tls_connection_engine_client_cert(struct tls_connection *conn,
1562 const char *cert_id)
1563 {
1564 #ifndef OPENSSL_NO_ENGINE
1565 X509 *cert;
1566
1567 if (tls_engine_get_cert(conn, cert_id, &cert))
1568 return -1;
1569
1570 if (!SSL_use_certificate(conn->ssl, cert)) {
1571 tls_show_errors(MSG_ERROR, __func__,
1572 "SSL_use_certificate failed");
1573 X509_free(cert);
1574 return -1;
1575 }
1576 X509_free(cert);
1577 wpa_printf(MSG_DEBUG, "ENGINE: SSL_use_certificate --> "
1578 "OK");
1579 return 0;
1580
1581 #else /* OPENSSL_NO_ENGINE */
1582 return -1;
1583 #endif /* OPENSSL_NO_ENGINE */
1584 }
1585
1586
1587 static int tls_connection_engine_ca_cert(void *_ssl_ctx,
1588 struct tls_connection *conn,
1589 const char *ca_cert_id)
1590 {
1591 #ifndef OPENSSL_NO_ENGINE
1592 X509 *cert;
1593 SSL_CTX *ssl_ctx = _ssl_ctx;
1594
1595 if (tls_engine_get_cert(conn, ca_cert_id, &cert))
1596 return -1;
1597
1598 /* start off the same as tls_connection_ca_cert */
1599 X509_STORE_free(ssl_ctx->cert_store);
1600 ssl_ctx->cert_store = X509_STORE_new();
1601 if (ssl_ctx->cert_store == NULL) {
1602 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
1603 "certificate store", __func__);
1604 X509_free(cert);
1605 return -1;
1606 }
1607 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
1608 unsigned long err = ERR_peek_error();
1609 tls_show_errors(MSG_WARNING, __func__,
1610 "Failed to add CA certificate from engine "
1611 "to certificate store");
1612 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1613 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1614 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring cert"
1615 " already in hash table error",
1616 __func__);
1617 } else {
1618 X509_free(cert);
1619 return -1;
1620 }
1621 }
1622 X509_free(cert);
1623 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added CA certificate from engine "
1624 "to certificate store", __func__);
1625 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1626 return 0;
1627
1628 #else /* OPENSSL_NO_ENGINE */
1629 return -1;
1630 #endif /* OPENSSL_NO_ENGINE */
1631 }
1632
1633
1634 static int tls_connection_engine_private_key(struct tls_connection *conn)
1635 {
1636 #ifndef OPENSSL_NO_ENGINE
1637 if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) {
1638 tls_show_errors(MSG_ERROR, __func__,
1639 "ENGINE: cannot use private key for TLS");
1640 return -1;
1641 }
1642 if (!SSL_check_private_key(conn->ssl)) {
1643 tls_show_errors(MSG_INFO, __func__,
1644 "Private key failed verification");
1645 return -1;
1646 }
1647 return 0;
1648 #else /* OPENSSL_NO_ENGINE */
1649 wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but "
1650 "engine support was not compiled in");
1651 return -1;
1652 #endif /* OPENSSL_NO_ENGINE */
1653 }
1654
1655
1656 static int tls_connection_private_key(void *_ssl_ctx,
1657 struct tls_connection *conn,
1658 const char *private_key,
1659 const char *private_key_passwd,
1660 const u8 *private_key_blob,
1661 size_t private_key_blob_len)
1662 {
1663 SSL_CTX *ssl_ctx = _ssl_ctx;
1664 char *passwd;
1665 int ok;
1666
1667 if (private_key == NULL && private_key_blob == NULL)
1668 return 0;
1669
1670 if (private_key_passwd) {
1671 passwd = os_strdup(private_key_passwd);
1672 if (passwd == NULL)
1673 return -1;
1674 } else
1675 passwd = NULL;
1676
1677 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
1678 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
1679
1680 ok = 0;
1681 while (private_key_blob) {
1682 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl,
1683 (u8 *) private_key_blob,
1684 private_key_blob_len) == 1) {
1685 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
1686 "ASN1(EVP_PKEY_RSA) --> OK");
1687 ok = 1;
1688 break;
1689 } else {
1690 tls_show_errors(MSG_DEBUG, __func__,
1691 "SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA)"
1692 " failed");
1693 }
1694
1695 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl,
1696 (u8 *) private_key_blob,
1697 private_key_blob_len) == 1) {
1698 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
1699 "ASN1(EVP_PKEY_DSA) --> OK");
1700 ok = 1;
1701 break;
1702 } else {
1703 tls_show_errors(MSG_DEBUG, __func__,
1704 "SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA)"
1705 " failed");
1706 }
1707
1708 if (SSL_use_RSAPrivateKey_ASN1(conn->ssl,
1709 (u8 *) private_key_blob,
1710 private_key_blob_len) == 1) {
1711 wpa_printf(MSG_DEBUG, "OpenSSL: "
1712 "SSL_use_RSAPrivateKey_ASN1 --> OK");
1713 ok = 1;
1714 break;
1715 } else {
1716 tls_show_errors(MSG_DEBUG, __func__,
1717 "SSL_use_RSAPrivateKey_ASN1 failed");
1718 }
1719
1720 if (tls_read_pkcs12_blob(ssl_ctx, conn->ssl, private_key_blob,
1721 private_key_blob_len, passwd) == 0) {
1722 wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> "
1723 "OK");
1724 ok = 1;
1725 break;
1726 }
1727
1728 break;
1729 }
1730
1731 while (!ok && private_key) {
1732 #ifndef OPENSSL_NO_STDIO
1733 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
1734 SSL_FILETYPE_ASN1) == 1) {
1735 wpa_printf(MSG_DEBUG, "OpenSSL: "
1736 "SSL_use_PrivateKey_File (DER) --> OK");
1737 ok = 1;
1738 break;
1739 } else {
1740 tls_show_errors(MSG_DEBUG, __func__,
1741 "SSL_use_PrivateKey_File (DER) "
1742 "failed");
1743 }
1744
1745 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
1746 SSL_FILETYPE_PEM) == 1) {
1747 wpa_printf(MSG_DEBUG, "OpenSSL: "
1748 "SSL_use_PrivateKey_File (PEM) --> OK");
1749 ok = 1;
1750 break;
1751 } else {
1752 tls_show_errors(MSG_DEBUG, __func__,
1753 "SSL_use_PrivateKey_File (PEM) "
1754 "failed");
1755 }
1756 #else /* OPENSSL_NO_STDIO */
1757 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
1758 __func__);
1759 #endif /* OPENSSL_NO_STDIO */
1760
1761 if (tls_read_pkcs12(ssl_ctx, conn->ssl, private_key, passwd)
1762 == 0) {
1763 wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file "
1764 "--> OK");
1765 ok = 1;
1766 break;
1767 }
1768
1769 if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) {
1770 wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to "
1771 "access certificate store --> OK");
1772 ok = 1;
1773 break;
1774 }
1775
1776 break;
1777 }
1778
1779 if (!ok) {
1780 wpa_printf(MSG_INFO, "OpenSSL: Failed to load private key");
1781 os_free(passwd);
1782 ERR_clear_error();
1783 return -1;
1784 }
1785 ERR_clear_error();
1786 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
1787 os_free(passwd);
1788
1789 if (!SSL_check_private_key(conn->ssl)) {
1790 tls_show_errors(MSG_INFO, __func__, "Private key failed "
1791 "verification");
1792 return -1;
1793 }
1794
1795 wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully");
1796 return 0;
1797 }
1798
1799
1800 static int tls_global_private_key(SSL_CTX *ssl_ctx, const char *private_key,
1801 const char *private_key_passwd)
1802 {
1803 char *passwd;
1804
1805 if (private_key == NULL)
1806 return 0;
1807
1808 if (private_key_passwd) {
1809 passwd = os_strdup(private_key_passwd);
1810 if (passwd == NULL)
1811 return -1;
1812 } else
1813 passwd = NULL;
1814
1815 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
1816 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
1817 if (
1818 #ifndef OPENSSL_NO_STDIO
1819 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
1820 SSL_FILETYPE_ASN1) != 1 &&
1821 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
1822 SSL_FILETYPE_PEM) != 1 &&
1823 #endif /* OPENSSL_NO_STDIO */
1824 tls_read_pkcs12(ssl_ctx, NULL, private_key, passwd)) {
1825 tls_show_errors(MSG_INFO, __func__,
1826 "Failed to load private key");
1827 os_free(passwd);
1828 ERR_clear_error();
1829 return -1;
1830 }
1831 os_free(passwd);
1832 ERR_clear_error();
1833 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
1834
1835 if (!SSL_CTX_check_private_key(ssl_ctx)) {
1836 tls_show_errors(MSG_INFO, __func__,
1837 "Private key failed verification");
1838 return -1;
1839 }
1840
1841 return 0;
1842 }
1843
1844
1845 static int tls_connection_dh(struct tls_connection *conn, const char *dh_file)
1846 {
1847 #ifdef OPENSSL_NO_DH
1848 if (dh_file == NULL)
1849 return 0;
1850 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
1851 "dh_file specified");
1852 return -1;
1853 #else /* OPENSSL_NO_DH */
1854 DH *dh;
1855 BIO *bio;
1856
1857 /* TODO: add support for dh_blob */
1858 if (dh_file == NULL)
1859 return 0;
1860 if (conn == NULL)
1861 return -1;
1862
1863 bio = BIO_new_file(dh_file, "r");
1864 if (bio == NULL) {
1865 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
1866 dh_file, ERR_error_string(ERR_get_error(), NULL));
1867 return -1;
1868 }
1869 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
1870 BIO_free(bio);
1871 #ifndef OPENSSL_NO_DSA
1872 while (dh == NULL) {
1873 DSA *dsa;
1874 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
1875 " trying to parse as DSA params", dh_file,
1876 ERR_error_string(ERR_get_error(), NULL));
1877 bio = BIO_new_file(dh_file, "r");
1878 if (bio == NULL)
1879 break;
1880 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
1881 BIO_free(bio);
1882 if (!dsa) {
1883 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
1884 "'%s': %s", dh_file,
1885 ERR_error_string(ERR_get_error(), NULL));
1886 break;
1887 }
1888
1889 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
1890 dh = DSA_dup_DH(dsa);
1891 DSA_free(dsa);
1892 if (dh == NULL) {
1893 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
1894 "params into DH params");
1895 break;
1896 }
1897 break;
1898 }
1899 #endif /* !OPENSSL_NO_DSA */
1900 if (dh == NULL) {
1901 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
1902 "'%s'", dh_file);
1903 return -1;
1904 }
1905
1906 if (SSL_set_tmp_dh(conn->ssl, dh) != 1) {
1907 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
1908 "%s", dh_file,
1909 ERR_error_string(ERR_get_error(), NULL));
1910 DH_free(dh);
1911 return -1;
1912 }
1913 DH_free(dh);
1914 return 0;
1915 #endif /* OPENSSL_NO_DH */
1916 }
1917
1918
1919 static int tls_global_dh(SSL_CTX *ssl_ctx, const char *dh_file)
1920 {
1921 #ifdef OPENSSL_NO_DH
1922 if (dh_file == NULL)
1923 return 0;
1924 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
1925 "dh_file specified");
1926 return -1;
1927 #else /* OPENSSL_NO_DH */
1928 DH *dh;
1929 BIO *bio;
1930
1931 /* TODO: add support for dh_blob */
1932 if (dh_file == NULL)
1933 return 0;
1934 if (ssl_ctx == NULL)
1935 return -1;
1936
1937 bio = BIO_new_file(dh_file, "r");
1938 if (bio == NULL) {
1939 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
1940 dh_file, ERR_error_string(ERR_get_error(), NULL));
1941 return -1;
1942 }
1943 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
1944 BIO_free(bio);
1945 #ifndef OPENSSL_NO_DSA
1946 while (dh == NULL) {
1947 DSA *dsa;
1948 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
1949 " trying to parse as DSA params", dh_file,
1950 ERR_error_string(ERR_get_error(), NULL));
1951 bio = BIO_new_file(dh_file, "r");
1952 if (bio == NULL)
1953 break;
1954 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
1955 BIO_free(bio);
1956 if (!dsa) {
1957 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
1958 "'%s': %s", dh_file,
1959 ERR_error_string(ERR_get_error(), NULL));
1960 break;
1961 }
1962
1963 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
1964 dh = DSA_dup_DH(dsa);
1965 DSA_free(dsa);
1966 if (dh == NULL) {
1967 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
1968 "params into DH params");
1969 break;
1970 }
1971 break;
1972 }
1973 #endif /* !OPENSSL_NO_DSA */
1974 if (dh == NULL) {
1975 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
1976 "'%s'", dh_file);
1977 return -1;
1978 }
1979
1980 if (SSL_CTX_set_tmp_dh(ssl_ctx, dh) != 1) {
1981 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
1982 "%s", dh_file,
1983 ERR_error_string(ERR_get_error(), NULL));
1984 DH_free(dh);
1985 return -1;
1986 }
1987 DH_free(dh);
1988 return 0;
1989 #endif /* OPENSSL_NO_DH */
1990 }
1991
1992
1993 int tls_connection_get_keys(void *ssl_ctx, struct tls_connection *conn,
1994 struct tls_keys *keys)
1995 {
1996 SSL *ssl;
1997
1998 if (conn == NULL || keys == NULL)
1999 return -1;
2000 ssl = conn->ssl;
2001 if (ssl == NULL || ssl->s3 == NULL || ssl->session == NULL)
2002 return -1;
2003
2004 os_memset(keys, 0, sizeof(*keys));
2005 keys->master_key = ssl->session->master_key;
2006 keys->master_key_len = ssl->session->master_key_length;
2007 keys->client_random = ssl->s3->client_random;
2008 keys->client_random_len = SSL3_RANDOM_SIZE;
2009 keys->server_random = ssl->s3->server_random;
2010 keys->server_random_len = SSL3_RANDOM_SIZE;
2011
2012 return 0;
2013 }
2014
2015
2016 int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
2017 const char *label, int server_random_first,
2018 u8 *out, size_t out_len)
2019 {
2020 return -1;
2021 }
2022
2023
2024 u8 * tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn,
2025 const u8 *in_data, size_t in_len,
2026 size_t *out_len, u8 **appl_data,
2027 size_t *appl_data_len)
2028 {
2029 int res;
2030 u8 *out_data;
2031
2032 if (appl_data)
2033 *appl_data = NULL;
2034
2035 /*
2036 * Give TLS handshake data from the server (if available) to OpenSSL
2037 * for processing.
2038 */
2039 if (in_data &&
2040 BIO_write(conn->ssl_in, in_data, in_len) < 0) {
2041 tls_show_errors(MSG_INFO, __func__,
2042 "Handshake failed - BIO_write");
2043 return NULL;
2044 }
2045
2046 /* Initiate TLS handshake or continue the existing handshake */
2047 res = SSL_connect(conn->ssl);
2048 if (res != 1) {
2049 int err = SSL_get_error(conn->ssl, res);
2050 if (err == SSL_ERROR_WANT_READ)
2051 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want "
2052 "more data");
2053 else if (err == SSL_ERROR_WANT_WRITE)
2054 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to "
2055 "write");
2056 else {
2057 tls_show_errors(MSG_INFO, __func__, "SSL_connect");
2058 conn->failed++;
2059 }
2060 }
2061
2062 /* Get the TLS handshake data to be sent to the server */
2063 res = BIO_ctrl_pending(conn->ssl_out);
2064 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
2065 out_data = os_malloc(res == 0 ? 1 : res);
2066 if (out_data == NULL) {
2067 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
2068 "handshake output (%d bytes)", res);
2069 if (BIO_reset(conn->ssl_out) < 0) {
2070 tls_show_errors(MSG_INFO, __func__,
2071 "BIO_reset failed");
2072 }
2073 *out_len = 0;
2074 return NULL;
2075 }
2076 res = res == 0 ? 0 : BIO_read(conn->ssl_out, out_data, res);
2077 if (res < 0) {
2078 tls_show_errors(MSG_INFO, __func__,
2079 "Handshake failed - BIO_read");
2080 if (BIO_reset(conn->ssl_out) < 0) {
2081 tls_show_errors(MSG_INFO, __func__,
2082 "BIO_reset failed");
2083 }
2084 *out_len = 0;
2085 return NULL;
2086 }
2087 *out_len = res;
2088
2089 if (SSL_is_init_finished(conn->ssl) && appl_data) {
2090 *appl_data = os_malloc(in_len);
2091 if (*appl_data) {
2092 res = SSL_read(conn->ssl, *appl_data, in_len);
2093 if (res < 0) {
2094 tls_show_errors(MSG_INFO, __func__,
2095 "Failed to read possible "
2096 "Application Data");
2097 os_free(*appl_data);
2098 *appl_data = NULL;
2099 } else {
2100 *appl_data_len = res;
2101 wpa_hexdump_key(MSG_MSGDUMP, "SSL: Application"
2102 " Data in Finish message",
2103 *appl_data, *appl_data_len);
2104 }
2105 }
2106 }
2107
2108 return out_data;
2109 }
2110
2111
2112 u8 * tls_connection_server_handshake(void *ssl_ctx,
2113 struct tls_connection *conn,
2114 const u8 *in_data, size_t in_len,
2115 size_t *out_len)
2116 {
2117 int res;
2118 u8 *out_data;
2119
2120 /*
2121 * Give TLS handshake data from the client (if available) to OpenSSL
2122 * for processing.
2123 */
2124 if (in_data &&
2125 BIO_write(conn->ssl_in, in_data, in_len) < 0) {
2126 tls_show_errors(MSG_INFO, __func__,
2127 "Handshake failed - BIO_write");
2128 return NULL;
2129 }
2130
2131 /* Initiate TLS handshake or continue the existing handshake */
2132 res = SSL_accept(conn->ssl);
2133 if (res != 1) {
2134 int err = SSL_get_error(conn->ssl, res);
2135 if (err == SSL_ERROR_WANT_READ)
2136 wpa_printf(MSG_DEBUG, "SSL: SSL_accept - want "
2137 "more data");
2138 else if (err == SSL_ERROR_WANT_WRITE)
2139 wpa_printf(MSG_DEBUG, "SSL: SSL_accept - want to "
2140 "write");
2141 else {
2142 tls_show_errors(MSG_INFO, __func__, "SSL_accept");
2143 return NULL;
2144 }
2145 }
2146
2147 /* Get the TLS handshake data to be sent to the client */
2148 res = BIO_ctrl_pending(conn->ssl_out);
2149 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
2150 out_data = os_malloc(res == 0 ? 1 : res);
2151 if (out_data == NULL) {
2152 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
2153 "handshake output (%d bytes)", res);
2154 if (BIO_reset(conn->ssl_out) < 0) {
2155 tls_show_errors(MSG_INFO, __func__,
2156 "BIO_reset failed");
2157 }
2158 *out_len = 0;
2159 return NULL;
2160 }
2161 res = res == 0 ? 0 : BIO_read(conn->ssl_out, out_data, res);
2162 if (res < 0) {
2163 tls_show_errors(MSG_INFO, __func__,
2164 "Handshake failed - BIO_read");
2165 if (BIO_reset(conn->ssl_out) < 0) {
2166 tls_show_errors(MSG_INFO, __func__,
2167 "BIO_reset failed");
2168 }
2169 *out_len = 0;
2170 return NULL;
2171 }
2172 *out_len = res;
2173 return out_data;
2174 }
2175
2176
2177 int tls_connection_encrypt(void *ssl_ctx, struct tls_connection *conn,
2178 const u8 *in_data, size_t in_len,
2179 u8 *out_data, size_t out_len)
2180 {
2181 int res;
2182
2183 if (conn == NULL)
2184 return -1;
2185
2186 /* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */
2187 if ((res = BIO_reset(conn->ssl_in)) < 0 ||
2188 (res = BIO_reset(conn->ssl_out)) < 0) {
2189 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
2190 return res;
2191 }
2192 res = SSL_write(conn->ssl, in_data, in_len);
2193 if (res < 0) {
2194 tls_show_errors(MSG_INFO, __func__,
2195 "Encryption failed - SSL_write");
2196 return res;
2197 }
2198
2199 /* Read encrypted data to be sent to the server */
2200 res = BIO_read(conn->ssl_out, out_data, out_len);
2201 if (res < 0) {
2202 tls_show_errors(MSG_INFO, __func__,
2203 "Encryption failed - BIO_read");
2204 return res;
2205 }
2206
2207 return res;
2208 }
2209
2210
2211 int tls_connection_decrypt(void *ssl_ctx, struct tls_connection *conn,
2212 const u8 *in_data, size_t in_len,
2213 u8 *out_data, size_t out_len)
2214 {
2215 int res;
2216
2217 /* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */
2218 res = BIO_write(conn->ssl_in, in_data, in_len);
2219 if (res < 0) {
2220 tls_show_errors(MSG_INFO, __func__,
2221 "Decryption failed - BIO_write");
2222 return res;
2223 }
2224 if (BIO_reset(conn->ssl_out) < 0) {
2225 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
2226 return res;
2227 }
2228
2229 /* Read decrypted data for further processing */
2230 res = SSL_read(conn->ssl, out_data, out_len);
2231 if (res < 0) {
2232 tls_show_errors(MSG_INFO, __func__,
2233 "Decryption failed - SSL_read");
2234 return res;
2235 }
2236
2237 return res;
2238 }
2239
2240
2241 int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn)
2242 {
2243 return conn ? conn->ssl->hit : 0;
2244 }
2245
2246
2247 int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
2248 u8 *ciphers)
2249 {
2250 char buf[100], *pos, *end;
2251 u8 *c;
2252 int ret;
2253
2254 if (conn == NULL || conn->ssl == NULL || ciphers == NULL)
2255 return -1;
2256
2257 buf[0] = '\0';
2258 pos = buf;
2259 end = pos + sizeof(buf);
2260
2261 c = ciphers;
2262 while (*c != TLS_CIPHER_NONE) {
2263 const char *suite;
2264
2265 switch (*c) {
2266 case TLS_CIPHER_RC4_SHA:
2267 suite = "RC4-SHA";
2268 break;
2269 case TLS_CIPHER_AES128_SHA:
2270 suite = "AES128-SHA";
2271 break;
2272 case TLS_CIPHER_RSA_DHE_AES128_SHA:
2273 suite = "DHE-RSA-AES128-SHA";
2274 break;
2275 case TLS_CIPHER_ANON_DH_AES128_SHA:
2276 suite = "ADH-AES128-SHA";
2277 break;
2278 default:
2279 wpa_printf(MSG_DEBUG, "TLS: Unsupported "
2280 "cipher selection: %d", *c);
2281 return -1;
2282 }
2283 ret = os_snprintf(pos, end - pos, ":%s", suite);
2284 if (ret < 0 || ret >= end - pos)
2285 break;
2286 pos += ret;
2287
2288 c++;
2289 }
2290
2291 wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1);
2292
2293 if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) {
2294 tls_show_errors(MSG_INFO, __func__,
2295 "Cipher suite configuration failed");
2296 return -1;
2297 }
2298
2299 return 0;
2300 }
2301
2302
2303 int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn,
2304 char *buf, size_t buflen)
2305 {
2306 const char *name;
2307 if (conn == NULL || conn->ssl == NULL)
2308 return -1;
2309
2310 name = SSL_get_cipher(conn->ssl);
2311 if (name == NULL)
2312 return -1;
2313
2314 os_strlcpy(buf, name, buflen);
2315 return 0;
2316 }
2317
2318
2319 int tls_connection_enable_workaround(void *ssl_ctx,
2320 struct tls_connection *conn)
2321 {
2322 SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
2323
2324 return 0;
2325 }
2326
2327
2328 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC)
2329 /* ClientHello TLS extensions require a patch to openssl, so this function is
2330 * commented out unless explicitly needed for EAP-FAST in order to be able to
2331 * build this file with unmodified openssl. */
2332 int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn,
2333 int ext_type, const u8 *data,
2334 size_t data_len)
2335 {
2336 if (conn == NULL || conn->ssl == NULL)
2337 return -1;
2338
2339 if (SSL_set_hello_extension(conn->ssl, ext_type, (void *) data,
2340 data_len) != 1)
2341 return -1;
2342
2343 return 0;
2344 }
2345 #endif /* EAP_FAST || EAP_FAST_DYNAMIC */
2346
2347
2348 int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn)
2349 {
2350 if (conn == NULL)
2351 return -1;
2352 return conn->failed;
2353 }
2354
2355
2356 int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn)
2357 {
2358 if (conn == NULL)
2359 return -1;
2360 return conn->read_alerts;
2361 }
2362
2363
2364 int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn)
2365 {
2366 if (conn == NULL)
2367 return -1;
2368 return conn->write_alerts;
2369 }
2370
2371
2372 int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
2373 const struct tls_connection_params *params)
2374 {
2375 int ret;
2376 unsigned long err;
2377
2378 if (conn == NULL)
2379 return -1;
2380
2381 while ((err = ERR_get_error())) {
2382 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
2383 __func__, ERR_error_string(err, NULL));
2384 }
2385
2386 if (params->engine) {
2387 wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine");
2388 ret = tls_engine_init(conn, params->engine_id, params->pin,
2389 params->key_id, params->cert_id,
2390 params->ca_cert_id);
2391 if (ret)
2392 return ret;
2393 }
2394 if (tls_connection_set_subject_match(conn,
2395 params->subject_match,
2396 params->altsubject_match))
2397 return -1;
2398
2399 if (params->engine && params->ca_cert_id) {
2400 if (tls_connection_engine_ca_cert(tls_ctx, conn,
2401 params->ca_cert_id))
2402 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
2403 } else if (tls_connection_ca_cert(tls_ctx, conn, params->ca_cert,
2404 params->ca_cert_blob,
2405 params->ca_cert_blob_len,
2406 params->ca_path))
2407 return -1;
2408
2409 if (params->engine && params->cert_id) {
2410 if (tls_connection_engine_client_cert(conn, params->cert_id))
2411 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
2412 } else if (tls_connection_client_cert(conn, params->client_cert,
2413 params->client_cert_blob,
2414 params->client_cert_blob_len))
2415 return -1;
2416
2417 if (params->engine && params->key_id) {
2418 wpa_printf(MSG_DEBUG, "TLS: Using private key from engine");
2419 if (tls_connection_engine_private_key(conn))
2420 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
2421 } else if (tls_connection_private_key(tls_ctx, conn,
2422 params->private_key,
2423 params->private_key_passwd,
2424 params->private_key_blob,
2425 params->private_key_blob_len)) {
2426 wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'",
2427 params->private_key);
2428 return -1;
2429 }
2430
2431 if (tls_connection_dh(conn, params->dh_file)) {
2432 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
2433 params->dh_file);
2434 return -1;
2435 }
2436
2437 tls_get_errors(tls_ctx);
2438
2439 return 0;
2440 }
2441
2442
2443 int tls_global_set_params(void *tls_ctx,
2444 const struct tls_connection_params *params)
2445 {
2446 SSL_CTX *ssl_ctx = tls_ctx;
2447 unsigned long err;
2448
2449 while ((err = ERR_get_error())) {
2450 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
2451 __func__, ERR_error_string(err, NULL));
2452 }
2453
2454 if (tls_global_ca_cert(ssl_ctx, params->ca_cert))
2455 return -1;
2456
2457 if (tls_global_client_cert(ssl_ctx, params->client_cert))
2458 return -1;
2459
2460 if (tls_global_private_key(ssl_ctx, params->private_key,
2461 params->private_key_passwd))
2462 return -1;
2463
2464 if (tls_global_dh(ssl_ctx, params->dh_file)) {
2465 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
2466 params->dh_file);
2467 return -1;
2468 }
2469
2470 return 0;
2471 }
2472
2473
2474 int tls_connection_get_keyblock_size(void *tls_ctx,
2475 struct tls_connection *conn)
2476 {
2477 const EVP_CIPHER *c;
2478 const EVP_MD *h;
2479
2480 if (conn == NULL || conn->ssl == NULL ||
2481 conn->ssl->enc_read_ctx == NULL ||
2482 conn->ssl->enc_read_ctx->cipher == NULL ||
2483 conn->ssl->read_hash == NULL)
2484 return -1;
2485
2486 c = conn->ssl->enc_read_ctx->cipher;
2487 #if OPENSSL_VERSION_NUMBER >= 0x00909000L
2488 h = EVP_MD_CTX_md(conn->ssl->read_hash);
2489 #else
2490 h = conn->ssl->read_hash;
2491 #endif
2492
2493 return 2 * (EVP_CIPHER_key_length(c) +
2494 EVP_MD_size(h) +
2495 EVP_CIPHER_iv_length(c));
2496 }
2497
2498
2499 unsigned int tls_capabilities(void *tls_ctx)
2500 {
2501 return 0;
2502 }
2503
2504
2505 int tls_connection_set_ia(void *tls_ctx, struct tls_connection *conn,
2506 int tls_ia)
2507 {
2508 return -1;
2509 }
2510
2511
2512 int tls_connection_ia_send_phase_finished(void *tls_ctx,
2513 struct tls_connection *conn,
2514 int final,
2515 u8 *out_data, size_t out_len)
2516 {
2517 return -1;
2518 }
2519
2520
2521 int tls_connection_ia_final_phase_finished(void *tls_ctx,
2522 struct tls_connection *conn)
2523 {
2524 return -1;
2525 }
2526
2527
2528 int tls_connection_ia_permute_inner_secret(void *tls_ctx,
2529 struct tls_connection *conn,
2530 const u8 *key, size_t key_len)
2531 {
2532 return -1;
2533 }
2534
2535
2536 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC)
2537 /* Pre-shared secred requires a patch to openssl, so this function is
2538 * commented out unless explicitly needed for EAP-FAST in order to be able to
2539 * build this file with unmodified openssl. */
2540
2541 static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
2542 STACK_OF(SSL_CIPHER) *peer_ciphers,
2543 SSL_CIPHER **cipher, void *arg)
2544 {
2545 struct tls_connection *conn = arg;
2546 int ret;
2547
2548 if (conn == NULL || conn->session_ticket_cb == NULL)
2549 return 0;
2550
2551 ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx,
2552 conn->session_ticket,
2553 conn->session_ticket_len,
2554 s->s3->client_random,
2555 s->s3->server_random, secret);
2556 os_free(conn->session_ticket);
2557 conn->session_ticket = NULL;
2558
2559 if (ret <= 0)
2560 return 0;
2561
2562 *secret_len = SSL_MAX_MASTER_KEY_LENGTH;
2563 return 1;
2564 }
2565
2566
2567 #ifdef SSL_OP_NO_TICKET
2568 static void tls_hello_ext_cb(SSL *s, int client_server, int type,
2569 unsigned char *data, int len, void *arg)
2570 {
2571 struct tls_connection *conn = arg;
2572
2573 if (conn == NULL || conn->session_ticket_cb == NULL)
2574 return;
2575
2576 wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__,
2577 type, len);
2578
2579 if (type == TLSEXT_TYPE_session_ticket && !client_server) {
2580 os_free(conn->session_ticket);
2581 conn->session_ticket = NULL;
2582
2583 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
2584 "extension", data, len);
2585 conn->session_ticket = os_malloc(len);
2586 if (conn->session_ticket == NULL)
2587 return;
2588
2589 os_memcpy(conn->session_ticket, data, len);
2590 conn->session_ticket_len = len;
2591 }
2592 }
2593 #else /* SSL_OP_NO_TICKET */
2594 static int tls_hello_ext_cb(SSL *s, TLS_EXTENSION *ext, void *arg)
2595 {
2596 struct tls_connection *conn = arg;
2597
2598 if (conn == NULL || conn->session_ticket_cb == NULL)
2599 return 0;
2600
2601 wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__,
2602 ext->type, ext->length);
2603
2604 os_free(conn->session_ticket);
2605 conn->session_ticket = NULL;
2606
2607 if (ext->type == 35) {
2608 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
2609 "extension", ext->data, ext->length);
2610 conn->session_ticket = os_malloc(ext->length);
2611 if (conn->session_ticket == NULL)
2612 return SSL_AD_INTERNAL_ERROR;
2613
2614 os_memcpy(conn->session_ticket, ext->data, ext->length);
2615 conn->session_ticket_len = ext->length;
2616 }
2617
2618 return 0;
2619 }
2620 #endif /* SSL_OP_NO_TICKET */
2621 #endif /* EAP_FAST || EAP_FAST_DYNAMIC */
2622
2623
2624 int tls_connection_set_session_ticket_cb(void *tls_ctx,
2625 struct tls_connection *conn,
2626 tls_session_ticket_cb cb,
2627 void *ctx)
2628 {
2629 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC)
2630 conn->session_ticket_cb = cb;
2631 conn->session_ticket_cb_ctx = ctx;
2632
2633 if (cb) {
2634 if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb,
2635 conn) != 1)
2636 return -1;
2637 #ifdef SSL_OP_NO_TICKET
2638 SSL_set_tlsext_debug_callback(conn->ssl, tls_hello_ext_cb);
2639 SSL_set_tlsext_debug_arg(conn->ssl, conn);
2640 #else /* SSL_OP_NO_TICKET */
2641 if (SSL_set_hello_extension_cb(conn->ssl, tls_hello_ext_cb,
2642 conn) != 1)
2643 return -1;
2644 #endif /* SSL_OP_NO_TICKET */
2645 } else {
2646 if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1)
2647 return -1;
2648 #ifdef SSL_OP_NO_TICKET
2649 SSL_set_tlsext_debug_callback(conn->ssl, NULL);
2650 SSL_set_tlsext_debug_arg(conn->ssl, conn);
2651 #else /* SSL_OP_NO_TICKET */
2652 if (SSL_set_hello_extension_cb(conn->ssl, NULL, NULL) != 1)
2653 return -1;
2654 #endif /* SSL_OP_NO_TICKET */
2655 }
2656
2657 return 0;
2658 #else /* EAP_FAST || EAP_FAST_DYNAMIC */
2659 return -1;
2660 #endif /* EAP_FAST || EAP_FAST_DYNAMIC */
2661 }
NetBSD on the FriendlyARM MINI2440