]> git.ipfire.org Git - thirdparty/hostap.git/blame - src/crypto/tls_openssl.c
projects / thirdparty / hostap.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Only use SSL_OP_NO_COMPRESSION if it is defined
[thirdparty/hostap.git] / src / crypto / tls_openssl.c
CommitLineData
6fc6879b
JM		 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
40static int tls_openssl_ref_count = 0;
41
42struct 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
63static 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
75static 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
107static 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
113static PCCERT_CONTEXT WINAPI
114(*CertEnumCertificatesInStore)(HCERTSTORE hCertStore,
115 PCCERT_CONTEXT pPrevCertContext)
116= NULL; /* to be loaded from crypt32.dll */
117
118static 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
158static int mingw_load_crypto_func(void)
159{
160 return 0;
161}
162
163#endif /* __MINGW32_VERSION */
164
165
166struct cryptoapi_rsa_data {
167 const CERT_CONTEXT *cert;
168 HCRYPTPROV crypt_prov;
169 DWORD key_spec;
170 BOOL free_crypt_prov;
171};
172
173
174static void cryptoapi_error(const char *msg)
175{
176 wpa_printf(MSG_INFO, "CryptoAPI: %s; err=%u",
177 msg, (unsigned int) GetLastError());
178}
179
180
181static 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
189static 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
197static 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
268err:
269 os_free(buf);
270 CryptDestroyHash(hash);
271
272 return ret;
273}
274
275
276static 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
284static 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
296static 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
305static 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
351static 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
441err:
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
454static 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
524static int tls_cryptoapi_cert(SSL *ssl, const char *name)
525{
526 return -1;
527}
528
529#endif /* CONFIG_NATIVE_WINDOWS */
530
531
532static 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 */
585static 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 */
657static 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 */
692static 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
717void * 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
761void 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
779static int tls_engine_init(struct tls_connection *conn, const char *engine_id,
780 const char *pin, const char *key_id)
781{
782#ifndef OPENSSL_NO_ENGINE
783 int ret = -1;
784 if (engine_id == NULL) {
785 wpa_printf(MSG_ERROR, "ENGINE: Engine ID not set");
786 return -1;
787 }
788 if (pin == NULL) {
789 wpa_printf(MSG_ERROR, "ENGINE: Smartcard PIN not set");
790 return -1;
791 }
792 if (key_id == NULL) {
793 wpa_printf(MSG_ERROR, "ENGINE: Key Id not set");
794 return -1;
795 }
796
797 ERR_clear_error();
798 conn->engine = ENGINE_by_id(engine_id);
799 if (!conn->engine) {
800 wpa_printf(MSG_ERROR, "ENGINE: engine %s not available [%s]",
801 engine_id, ERR_error_string(ERR_get_error(), NULL));
802 goto err;
803 }
804 if (ENGINE_init(conn->engine) != 1) {
805 wpa_printf(MSG_ERROR, "ENGINE: engine init failed "
806 "(engine: %s) [%s]", engine_id,
807 ERR_error_string(ERR_get_error(), NULL));
808 goto err;
809 }
810 wpa_printf(MSG_DEBUG, "ENGINE: engine initialized");
811
812 if (ENGINE_ctrl_cmd_string(conn->engine, "PIN", pin, 0) == 0) {
813 wpa_printf(MSG_ERROR, "ENGINE: cannot set pin [%s]",
814 ERR_error_string(ERR_get_error(), NULL));
815 goto err;
816 }
817 conn->private_key = ENGINE_load_private_key(conn->engine,
818 key_id, NULL, NULL);
819 if (!conn->private_key) {
820 wpa_printf(MSG_ERROR, "ENGINE: cannot load private key with id"
821 " '%s' [%s]", key_id,
822 ERR_error_string(ERR_get_error(), NULL));
823 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
824 goto err;
825 }
826 return 0;
827
828err:
829 if (conn->engine) {
830 ENGINE_free(conn->engine);
831 conn->engine = NULL;
832 }
833
834 if (conn->private_key) {
835 EVP_PKEY_free(conn->private_key);
836 conn->private_key = NULL;
837 }
838
839 return ret;
840#else /* OPENSSL_NO_ENGINE */
841 return 0;
842#endif /* OPENSSL_NO_ENGINE */
843}
844
845
846static void tls_engine_deinit(struct tls_connection *conn)
847{
848#ifndef OPENSSL_NO_ENGINE
849 wpa_printf(MSG_DEBUG, "ENGINE: engine deinit");
850 if (conn->private_key) {
851 EVP_PKEY_free(conn->private_key);
852 conn->private_key = NULL;
853 }
854 if (conn->engine) {
855 ENGINE_finish(conn->engine);
856 conn->engine = NULL;
857 }
858#endif /* OPENSSL_NO_ENGINE */
859}
860
861
862int tls_get_errors(void *ssl_ctx)
863{
864 int count = 0;
865 unsigned long err;
866
867 while ((err = ERR_get_error())) {
868 wpa_printf(MSG_INFO, "TLS - SSL error: %s",
869 ERR_error_string(err, NULL));
870 count++;
871 }
872
873 return count;
874}
875
876struct tls_connection * tls_connection_init(void *ssl_ctx)
877{
878 SSL_CTX *ssl = ssl_ctx;
879 struct tls_connection *conn;
fca25ef4 880 long options;
6fc6879b
JM		 881
882 conn = os_zalloc(sizeof(*conn));
883 if (conn == NULL)
884 return NULL;
885 conn->ssl = SSL_new(ssl);
886 if (conn->ssl == NULL) {
887 tls_show_errors(MSG_INFO, __func__,
888 "Failed to initialize new SSL connection");
889 os_free(conn);
890 return NULL;
891 }
892
893 SSL_set_app_data(conn->ssl, conn);
fca25ef4
JM		 894 options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 |
895 SSL_OP_SINGLE_DH_USE;
896#ifdef SSL_OP_NO_COMPRESSION
897 options |= SSL_OP_NO_COMPRESSION;
898#endif /* SSL_OP_NO_COMPRESSION */
899 SSL_set_options(conn->ssl, options);
6fc6879b
JM		 900
901 conn->ssl_in = BIO_new(BIO_s_mem());
902 if (!conn->ssl_in) {
903 tls_show_errors(MSG_INFO, __func__,
904 "Failed to create a new BIO for ssl_in");
905 SSL_free(conn->ssl);
906 os_free(conn);
907 return NULL;
908 }
909
910 conn->ssl_out = BIO_new(BIO_s_mem());
911 if (!conn->ssl_out) {
912 tls_show_errors(MSG_INFO, __func__,
913 "Failed to create a new BIO for ssl_out");
914 SSL_free(conn->ssl);
915 BIO_free(conn->ssl_in);
916 os_free(conn);
917 return NULL;
918 }
919
920 SSL_set_bio(conn->ssl, conn->ssl_in, conn->ssl_out);
921
922 return conn;
923}
924
925
926void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn)
927{
928 if (conn == NULL)
929 return;
930 SSL_free(conn->ssl);
931 tls_engine_deinit(conn);
932 os_free(conn->subject_match);
933 os_free(conn->altsubject_match);
934 os_free(conn->session_ticket);
935 os_free(conn);
936}
937
938
939int tls_connection_established(void *ssl_ctx, struct tls_connection *conn)
940{
941 return conn ? SSL_is_init_finished(conn->ssl) : 0;
942}
943
944
945int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn)
946{
947 if (conn == NULL)
948 return -1;
949
950 /* Shutdown previous TLS connection without notifying the peer
951 * because the connection was already terminated in practice
952 * and "close notify" shutdown alert would confuse AS. */
953 SSL_set_quiet_shutdown(conn->ssl, 1);
954 SSL_shutdown(conn->ssl);
955 return 0;
956}
957
958
959static int tls_match_altsubject_component(X509 *cert, int type,
960 const char *value, size_t len)
961{
962 GENERAL_NAME *gen;
963 void *ext;
964 int i, found = 0;
965
966 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
967
968 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
969 gen = sk_GENERAL_NAME_value(ext, i);
970 if (gen->type != type)
971 continue;
972 if (os_strlen((char *) gen->d.ia5->data) == len &&
973 os_memcmp(value, gen->d.ia5->data, len) == 0)
974 found++;
975 }
976
977 return found;
978}
979
980
981static int tls_match_altsubject(X509 *cert, const char *match)
982{
983 int type;
984 const char *pos, *end;
985 size_t len;
986
987 pos = match;
988 do {
989 if (os_strncmp(pos, "EMAIL:", 6) == 0) {
990 type = GEN_EMAIL;
991 pos += 6;
992 } else if (os_strncmp(pos, "DNS:", 4) == 0) {
993 type = GEN_DNS;
994 pos += 4;
995 } else if (os_strncmp(pos, "URI:", 4) == 0) {
996 type = GEN_URI;
997 pos += 4;
998 } else {
999 wpa_printf(MSG_INFO, "TLS: Invalid altSubjectName "
1000 "match '%s'", pos);
1001 return 0;
1002 }
1003 end = os_strchr(pos, ';');
1004 while (end) {
1005 if (os_strncmp(end + 1, "EMAIL:", 6) == 0 ||
1006 os_strncmp(end + 1, "DNS:", 4) == 0 ||
1007 os_strncmp(end + 1, "URI:", 4) == 0)
1008 break;
1009 end = os_strchr(end + 1, ';');
1010 }
1011 if (end)
1012 len = end - pos;
1013 else
1014 len = os_strlen(pos);
1015 if (tls_match_altsubject_component(cert, type, pos, len) > 0)
1016 return 1;
1017 pos = end + 1;
1018 } while (end);
1019
1020 return 0;
1021}
1022
1023
1024static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
1025{
1026 char buf[256];
1027 X509 *err_cert;
1028 int err, depth;
1029 SSL *ssl;
1030 struct tls_connection *conn;
1031 char *match, *altmatch;
1032
1033 err_cert = X509_STORE_CTX_get_current_cert(x509_ctx);
1034 err = X509_STORE_CTX_get_error(x509_ctx);
1035 depth = X509_STORE_CTX_get_error_depth(x509_ctx);
1036 ssl = X509_STORE_CTX_get_ex_data(x509_ctx,
1037 SSL_get_ex_data_X509_STORE_CTX_idx());
1038 X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf));
1039
1040 conn = SSL_get_app_data(ssl);
1041 match = conn ? conn->subject_match : NULL;
1042 altmatch = conn ? conn->altsubject_match : NULL;
1043
1044 if (!preverify_ok) {
1045 wpa_printf(MSG_WARNING, "TLS: Certificate verification failed,"
1046 " error %d (%s) depth %d for '%s'", err,
1047 X509_verify_cert_error_string(err), depth, buf);
1048 } else {
1049 wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - "
1050 "preverify_ok=%d err=%d (%s) depth=%d buf='%s'",
1051 preverify_ok, err,
1052 X509_verify_cert_error_string(err), depth, buf);
1053 if (depth == 0 && match && os_strstr(buf, match) == NULL) {
1054 wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not "
1055 "match with '%s'", buf, match);
1056 preverify_ok = 0;
1057 } else if (depth == 0 && altmatch &&
1058 !tls_match_altsubject(err_cert, altmatch)) {
1059 wpa_printf(MSG_WARNING, "TLS: altSubjectName match "
1060 "'%s' not found", altmatch);
1061 preverify_ok = 0;
1062 }
1063 }
1064
1065 return preverify_ok;
1066}
1067
1068
1069#ifndef OPENSSL_NO_STDIO
1070static int tls_load_ca_der(void *_ssl_ctx, const char *ca_cert)
1071{
1072 SSL_CTX *ssl_ctx = _ssl_ctx;
1073 X509_LOOKUP *lookup;
1074 int ret = 0;
1075
1076 lookup = X509_STORE_add_lookup(ssl_ctx->cert_store,
1077 X509_LOOKUP_file());
1078 if (lookup == NULL) {
1079 tls_show_errors(MSG_WARNING, __func__,
1080 "Failed add lookup for X509 store");
1081 return -1;
1082 }
1083
1084 if (!X509_LOOKUP_load_file(lookup, ca_cert, X509_FILETYPE_ASN1)) {
1085 unsigned long err = ERR_peek_error();
1086 tls_show_errors(MSG_WARNING, __func__,
1087 "Failed load CA in DER format");
1088 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1089 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1090 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1091 "cert already in hash table error",
1092 __func__);
1093 } else
1094 ret = -1;
1095 }
1096
1097 return ret;
1098}
1099#endif /* OPENSSL_NO_STDIO */
1100
1101
1102static int tls_connection_ca_cert(void *_ssl_ctx, struct tls_connection *conn,
1103 const char *ca_cert, const u8 *ca_cert_blob,
1104 size_t ca_cert_blob_len, const char *ca_path)
1105{
1106 SSL_CTX *ssl_ctx = _ssl_ctx;
1107
1108 /*
1109 * Remove previously configured trusted CA certificates before adding
1110 * new ones.
1111 */
1112 X509_STORE_free(ssl_ctx->cert_store);
1113 ssl_ctx->cert_store = X509_STORE_new();
1114 if (ssl_ctx->cert_store == NULL) {
1115 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
1116 "certificate store", __func__);
1117 return -1;
1118 }
1119
1120 if (ca_cert_blob) {
1121 X509 *cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ca_cert_blob,
1122 ca_cert_blob_len);
1123 if (cert == NULL) {
1124 tls_show_errors(MSG_WARNING, __func__,
1125 "Failed to parse ca_cert_blob");
1126 return -1;
1127 }
1128
1129 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
1130 unsigned long err = ERR_peek_error();
1131 tls_show_errors(MSG_WARNING, __func__,
1132 "Failed to add ca_cert_blob to "
1133 "certificate store");
1134 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1135 ERR_GET_REASON(err) ==
1136 X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1137 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1138 "cert already in hash table error",
1139 __func__);
1140 } else {
1141 X509_free(cert);
1142 return -1;
1143 }
1144 }
1145 X509_free(cert);
1146 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob "
1147 "to certificate store", __func__);
1148 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1149 return 0;
1150 }
1151
1152#ifdef CONFIG_NATIVE_WINDOWS
1153 if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) ==
1154 0) {
1155 wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from "
1156 "system certificate store");
1157 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1158 return 0;
1159 }
1160#endif /* CONFIG_NATIVE_WINDOWS */
1161
1162 if (ca_cert || ca_path) {
1163#ifndef OPENSSL_NO_STDIO
1164 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) !=
1165 1) {
1166 tls_show_errors(MSG_WARNING, __func__,
1167 "Failed to load root certificates");
1168 if (ca_cert &&
1169 tls_load_ca_der(ssl_ctx, ca_cert) == 0) {
1170 wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded "
1171 "DER format CA certificate",
1172 __func__);
1173 } else
1174 return -1;
1175 } else {
1176 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1177 "certificate(s) loaded");
1178 tls_get_errors(ssl_ctx);
1179 }
1180 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1181#else /* OPENSSL_NO_STDIO */
1182 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
1183 __func__);
1184 return -1;
1185#endif /* OPENSSL_NO_STDIO */
1186 } else {
1187 /* No ca_cert configured - do not try to verify server
1188 * certificate */
1189 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
1190 }
1191
1192 return 0;
1193}
1194
1195
1196static int tls_global_ca_cert(SSL_CTX *ssl_ctx, const char *ca_cert)
1197{
1198 if (ca_cert) {
1199 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1)
1200 {
1201 tls_show_errors(MSG_WARNING, __func__,
1202 "Failed to load root certificates");
1203 return -1;
1204 }
1205
1206 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1207 "certificate(s) loaded");
1208
1209#ifndef OPENSSL_NO_STDIO
1210 /* Add the same CAs to the client certificate requests */
1211 SSL_CTX_set_client_CA_list(ssl_ctx,
1212 SSL_load_client_CA_file(ca_cert));
1213#endif /* OPENSSL_NO_STDIO */
1214 }
1215
1216 return 0;
1217}
1218
1219
1220int tls_global_set_verify(void *ssl_ctx, int check_crl)
1221{
1222 int flags;
1223
1224 if (check_crl) {
1225 X509_STORE *cs = SSL_CTX_get_cert_store(ssl_ctx);
1226 if (cs == NULL) {
1227 tls_show_errors(MSG_INFO, __func__, "Failed to get "
1228 "certificate store when enabling "
1229 "check_crl");
1230 return -1;
1231 }
1232 flags = X509_V_FLAG_CRL_CHECK;
1233 if (check_crl == 2)
1234 flags |= X509_V_FLAG_CRL_CHECK_ALL;
1235 X509_STORE_set_flags(cs, flags);
1236 }
1237 return 0;
1238}
1239
1240
1241static int tls_connection_set_subject_match(struct tls_connection *conn,
1242 const char *subject_match,
1243 const char *altsubject_match)
1244{
1245 os_free(conn->subject_match);
1246 conn->subject_match = NULL;
1247 if (subject_match) {
1248 conn->subject_match = os_strdup(subject_match);
1249 if (conn->subject_match == NULL)
1250 return -1;
1251 }
1252
1253 os_free(conn->altsubject_match);
1254 conn->altsubject_match = NULL;
1255 if (altsubject_match) {
1256 conn->altsubject_match = os_strdup(altsubject_match);
1257 if (conn->altsubject_match == NULL)
1258 return -1;
1259 }
1260
1261 return 0;
1262}
1263
1264
1265int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn,
1266 int verify_peer)
1267{
1268 if (conn == NULL)
1269 return -1;
1270
1271 if (verify_peer) {
1272 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER |
1273 SSL_VERIFY_FAIL_IF_NO_PEER_CERT |
1274 SSL_VERIFY_CLIENT_ONCE, tls_verify_cb);
1275 } else {
1276 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
1277 }
1278
1279 SSL_set_accept_state(conn->ssl);
1280
1281 return 0;
1282}
1283
1284
1285static int tls_connection_client_cert(struct tls_connection *conn,
1286 const char *client_cert,
1287 const u8 *client_cert_blob,
1288 size_t client_cert_blob_len)
1289{
1290 if (client_cert == NULL && client_cert_blob == NULL)
1291 return 0;
1292
1293 if (client_cert_blob &&
1294 SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob,
1295 client_cert_blob_len) == 1) {
1296 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> "
1297 "OK");
1298 return 0;
1299 } else if (client_cert_blob) {
1300 tls_show_errors(MSG_DEBUG, __func__,
1301 "SSL_use_certificate_ASN1 failed");
1302 }
1303
1304 if (client_cert == NULL)
1305 return -1;
1306
1307#ifndef OPENSSL_NO_STDIO
1308 if (SSL_use_certificate_file(conn->ssl, client_cert,
1309 SSL_FILETYPE_ASN1) == 1) {
1310 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)"
1311 " --> OK");
1312 return 0;
1313 } else {
1314 tls_show_errors(MSG_DEBUG, __func__,
1315 "SSL_use_certificate_file (DER) failed");
1316 }
1317
1318 if (SSL_use_certificate_file(conn->ssl, client_cert,
1319 SSL_FILETYPE_PEM) == 1) {
1320 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)"
1321 " --> OK");
1322 return 0;
1323 } else {
1324 tls_show_errors(MSG_DEBUG, __func__,
1325 "SSL_use_certificate_file (PEM) failed");
1326 }
1327#else /* OPENSSL_NO_STDIO */
1328 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1329#endif /* OPENSSL_NO_STDIO */
1330
1331 return -1;
1332}
1333
1334
1335static int tls_global_client_cert(SSL_CTX *ssl_ctx, const char *client_cert)
1336{
1337#ifndef OPENSSL_NO_STDIO
1338 if (client_cert == NULL)
1339 return 0;
1340
1341 if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1342 SSL_FILETYPE_ASN1) != 1 &&
1343 SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1344 SSL_FILETYPE_PEM) != 1) {
1345 tls_show_errors(MSG_INFO, __func__,
1346 "Failed to load client certificate");
1347 return -1;
1348 }
1349 return 0;
1350#else /* OPENSSL_NO_STDIO */
1351 if (client_cert == NULL)
1352 return 0;
1353 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1354 return -1;
1355#endif /* OPENSSL_NO_STDIO */
1356}
1357
1358
1359static int tls_passwd_cb(char *buf, int size, int rwflag, void *password)
1360{
1361 if (password == NULL) {
1362 return 0;
1363 }
1364 os_strlcpy(buf, (char *) password, size);
1365 return os_strlen(buf);
1366}
1367
1368
1369#ifdef PKCS12_FUNCS
1370static int tls_parse_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, PKCS12 *p12,
1371 const char *passwd)
1372{
1373 EVP_PKEY *pkey;
1374 X509 *cert;
1375 STACK_OF(X509) *certs;
1376 int res = 0;
1377 char buf[256];
1378
1379 pkey = NULL;
1380 cert = NULL;
1381 certs = NULL;
1382 if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) {
1383 tls_show_errors(MSG_DEBUG, __func__,
1384 "Failed to parse PKCS12 file");
1385 PKCS12_free(p12);
1386 return -1;
1387 }
1388 wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data");
1389
1390 if (cert) {
1391 X509_NAME_oneline(X509_get_subject_name(cert), buf,
1392 sizeof(buf));
1393 wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: "
1394 "subject='%s'", buf);
1395 if (ssl) {
1396 if (SSL_use_certificate(ssl, cert) != 1)
1397 res = -1;
1398 } else {
1399 if (SSL_CTX_use_certificate(ssl_ctx, cert) != 1)
1400 res = -1;
1401 }
1402 X509_free(cert);
1403 }
1404
1405 if (pkey) {
1406 wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12");
1407 if (ssl) {
1408 if (SSL_use_PrivateKey(ssl, pkey) != 1)
1409 res = -1;
1410 } else {
1411 if (SSL_CTX_use_PrivateKey(ssl_ctx, pkey) != 1)
1412 res = -1;
1413 }
1414 EVP_PKEY_free(pkey);
1415 }
1416
1417 if (certs) {
1418 while ((cert = sk_X509_pop(certs)) != NULL) {
1419 X509_NAME_oneline(X509_get_subject_name(cert), buf,
1420 sizeof(buf));
1421 wpa_printf(MSG_DEBUG, "TLS: additional certificate"
1422 " from PKCS12: subject='%s'", buf);
1423 /*
1424 * There is no SSL equivalent for the chain cert - so
1425 * always add it to the context...
1426 */
1427 if (SSL_CTX_add_extra_chain_cert(ssl_ctx, cert) != 1) {
1428 res = -1;
1429 break;
1430 }
1431 }
1432 sk_X509_free(certs);
1433 }
1434
1435 PKCS12_free(p12);
1436
1437 if (res < 0)
1438 tls_get_errors(ssl_ctx);
1439
1440 return res;
1441}
1442#endif /* PKCS12_FUNCS */
1443
1444
1445static int tls_read_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, const char *private_key,
1446 const char *passwd)
1447{
1448#ifdef PKCS12_FUNCS
1449 FILE *f;
1450 PKCS12 *p12;
1451
1452 f = fopen(private_key, "rb");
1453 if (f == NULL)
1454 return -1;
1455
1456 p12 = d2i_PKCS12_fp(f, NULL);
1457 fclose(f);
1458
1459 if (p12 == NULL) {
1460 tls_show_errors(MSG_INFO, __func__,
1461 "Failed to use PKCS#12 file");
1462 return -1;
1463 }
1464
1465 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
1466
1467#else /* PKCS12_FUNCS */
1468 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read "
1469 "p12/pfx files");
1470 return -1;
1471#endif /* PKCS12_FUNCS */
1472}
1473
1474
1475static int tls_read_pkcs12_blob(SSL_CTX *ssl_ctx, SSL *ssl,
1476 const u8 *blob, size_t len, const char *passwd)
1477{
1478#ifdef PKCS12_FUNCS
1479 PKCS12 *p12;
1480
1481 p12 = d2i_PKCS12(NULL, (OPENSSL_d2i_TYPE) &blob, len);
1482 if (p12 == NULL) {
1483 tls_show_errors(MSG_INFO, __func__,
1484 "Failed to use PKCS#12 blob");
1485 return -1;
1486 }
1487
1488 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
1489
1490#else /* PKCS12_FUNCS */
1491 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse "
1492 "p12/pfx blobs");
1493 return -1;
1494#endif /* PKCS12_FUNCS */
1495}
1496
1497
1498static int tls_connection_engine_private_key(struct tls_connection *conn)
1499{
1500#ifndef OPENSSL_NO_ENGINE
1501 if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) {
1502 tls_show_errors(MSG_ERROR, __func__,
1503 "ENGINE: cannot use private key for TLS");
1504 return -1;
1505 }
1506 if (!SSL_check_private_key(conn->ssl)) {
1507 tls_show_errors(MSG_INFO, __func__,
1508 "Private key failed verification");
1509 return -1;
1510 }
1511 return 0;
1512#else /* OPENSSL_NO_ENGINE */
1513 wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but "
1514 "engine support was not compiled in");
1515 return -1;
1516#endif /* OPENSSL_NO_ENGINE */
1517}
1518
1519
1520static int tls_connection_private_key(void *_ssl_ctx,
1521 struct tls_connection *conn,
1522 const char *private_key,
1523 const char *private_key_passwd,
1524 const u8 *private_key_blob,
1525 size_t private_key_blob_len)
1526{
1527 SSL_CTX *ssl_ctx = _ssl_ctx;
1528 char *passwd;
1529 int ok;
1530
1531 if (private_key == NULL && private_key_blob == NULL)
1532 return 0;
1533
1534 if (private_key_passwd) {
1535 passwd = os_strdup(private_key_passwd);
1536 if (passwd == NULL)
1537 return -1;
1538 } else
1539 passwd = NULL;
1540
1541 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
1542 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
1543
1544 ok = 0;
1545 while (private_key_blob) {
1546 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl,
1547 (u8 *) private_key_blob,
1548 private_key_blob_len) == 1) {
1549 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
1550 "ASN1(EVP_PKEY_RSA) --> OK");
1551 ok = 1;
1552 break;
1553 } else {
1554 tls_show_errors(MSG_DEBUG, __func__,
1555 "SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA)"
1556 " failed");
1557 }
1558
1559 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl,
1560 (u8 *) private_key_blob,
1561 private_key_blob_len) == 1) {
1562 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
1563 "ASN1(EVP_PKEY_DSA) --> OK");
1564 ok = 1;
1565 break;
1566 } else {
1567 tls_show_errors(MSG_DEBUG, __func__,
1568 "SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA)"
1569 " failed");
1570 }
1571
1572 if (SSL_use_RSAPrivateKey_ASN1(conn->ssl,
1573 (u8 *) private_key_blob,
1574 private_key_blob_len) == 1) {
1575 wpa_printf(MSG_DEBUG, "OpenSSL: "
1576 "SSL_use_RSAPrivateKey_ASN1 --> OK");
1577 ok = 1;
1578 break;
1579 } else {
1580 tls_show_errors(MSG_DEBUG, __func__,
1581 "SSL_use_RSAPrivateKey_ASN1 failed");
1582 }
1583
1584 if (tls_read_pkcs12_blob(ssl_ctx, conn->ssl, private_key_blob,
1585 private_key_blob_len, passwd) == 0) {
1586 wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> "
1587 "OK");
1588 ok = 1;
1589 break;
1590 }
1591
1592 break;
1593 }
1594
1595 while (!ok && private_key) {
1596#ifndef OPENSSL_NO_STDIO
1597 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
1598 SSL_FILETYPE_ASN1) == 1) {
1599 wpa_printf(MSG_DEBUG, "OpenSSL: "
1600 "SSL_use_PrivateKey_File (DER) --> OK");
1601 ok = 1;
1602 break;
1603 } else {
1604 tls_show_errors(MSG_DEBUG, __func__,
1605 "SSL_use_PrivateKey_File (DER) "
1606 "failed");
1607 }
1608
1609 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
1610 SSL_FILETYPE_PEM) == 1) {
1611 wpa_printf(MSG_DEBUG, "OpenSSL: "
1612 "SSL_use_PrivateKey_File (PEM) --> OK");
1613 ok = 1;
1614 break;
1615 } else {
1616 tls_show_errors(MSG_DEBUG, __func__,
1617 "SSL_use_PrivateKey_File (PEM) "
1618 "failed");
1619 }
1620#else /* OPENSSL_NO_STDIO */
1621 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
1622 __func__);
1623#endif /* OPENSSL_NO_STDIO */
1624
1625 if (tls_read_pkcs12(ssl_ctx, conn->ssl, private_key, passwd)
1626 == 0) {
1627 wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file "
1628 "--> OK");
1629 ok = 1;
1630 break;
1631 }
1632
1633 if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) {
1634 wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to "
1635 "access certificate store --> OK");
1636 ok = 1;
1637 break;
1638 }
1639
1640 break;
1641 }
1642
1643 if (!ok) {
1644 wpa_printf(MSG_INFO, "OpenSSL: Failed to load private key");
1645 os_free(passwd);
1646 ERR_clear_error();
1647 return -1;
1648 }
1649 ERR_clear_error();
1650 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
1651 os_free(passwd);
1652
1653 if (!SSL_check_private_key(conn->ssl)) {
1654 tls_show_errors(MSG_INFO, __func__, "Private key failed "
1655 "verification");
1656 return -1;
1657 }
1658
1659 wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully");
1660 return 0;
1661}
1662
1663
1664static int tls_global_private_key(SSL_CTX *ssl_ctx, const char *private_key,
1665 const char *private_key_passwd)
1666{
1667 char *passwd;
1668
1669 if (private_key == NULL)
1670 return 0;
1671
1672 if (private_key_passwd) {
1673 passwd = os_strdup(private_key_passwd);
1674 if (passwd == NULL)
1675 return -1;
1676 } else
1677 passwd = NULL;
1678
1679 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
1680 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
1681 if (
1682#ifndef OPENSSL_NO_STDIO
1683 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
1684 SSL_FILETYPE_ASN1) != 1 &&
1685 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
1686 SSL_FILETYPE_PEM) != 1 &&
1687#endif /* OPENSSL_NO_STDIO */
1688 tls_read_pkcs12(ssl_ctx, NULL, private_key, passwd)) {
1689 tls_show_errors(MSG_INFO, __func__,
1690 "Failed to load private key");
1691 os_free(passwd);
1692 ERR_clear_error();
1693 return -1;
1694 }
1695 os_free(passwd);
1696 ERR_clear_error();
1697 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
1698
1699 if (!SSL_CTX_check_private_key(ssl_ctx)) {
1700 tls_show_errors(MSG_INFO, __func__,
1701 "Private key failed verification");
1702 return -1;
1703 }
1704
1705 return 0;
1706}
1707
1708
1709static int tls_connection_dh(struct tls_connection *conn, const char *dh_file)
1710{
1711#ifdef OPENSSL_NO_DH
1712 if (dh_file == NULL)
1713 return 0;
1714 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
1715 "dh_file specified");
1716 return -1;
1717#else /* OPENSSL_NO_DH */
1718 DH *dh;
1719 BIO *bio;
1720
1721 /* TODO: add support for dh_blob */
1722 if (dh_file == NULL)
1723 return 0;
1724 if (conn == NULL)
1725 return -1;
1726
1727 bio = BIO_new_file(dh_file, "r");
1728 if (bio == NULL) {
1729 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
1730 dh_file, ERR_error_string(ERR_get_error(), NULL));
1731 return -1;
1732 }
1733 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
1734 BIO_free(bio);
1735#ifndef OPENSSL_NO_DSA
1736 while (dh == NULL) {
1737 DSA *dsa;
1738 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
1739 " trying to parse as DSA params", dh_file,
1740 ERR_error_string(ERR_get_error(), NULL));
1741 bio = BIO_new_file(dh_file, "r");
1742 if (bio == NULL)
1743 break;
1744 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
1745 BIO_free(bio);
1746 if (!dsa) {
1747 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
1748 "'%s': %s", dh_file,
1749 ERR_error_string(ERR_get_error(), NULL));
1750 break;
1751 }
1752
1753 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
1754 dh = DSA_dup_DH(dsa);
1755 DSA_free(dsa);
1756 if (dh == NULL) {
1757 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
1758 "params into DH params");
1759 break;
1760 }
1761 break;
1762 }
1763#endif /* !OPENSSL_NO_DSA */
1764 if (dh == NULL) {
1765 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
1766 "'%s'", dh_file);
1767 return -1;
1768 }
1769
1770 if (SSL_set_tmp_dh(conn->ssl, dh) != 1) {
1771 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
1772 "%s", dh_file,
1773 ERR_error_string(ERR_get_error(), NULL));
1774 DH_free(dh);
1775 return -1;
1776 }
1777 DH_free(dh);
1778 return 0;
1779#endif /* OPENSSL_NO_DH */
1780}
1781
1782
1783static int tls_global_dh(SSL_CTX *ssl_ctx, const char *dh_file)
1784{
1785#ifdef OPENSSL_NO_DH
1786 if (dh_file == NULL)
1787 return 0;
1788 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
1789 "dh_file specified");
1790 return -1;
1791#else /* OPENSSL_NO_DH */
1792 DH *dh;
1793 BIO *bio;
1794
1795 /* TODO: add support for dh_blob */
1796 if (dh_file == NULL)
1797 return 0;
1798 if (ssl_ctx == NULL)
1799 return -1;
1800
1801 bio = BIO_new_file(dh_file, "r");
1802 if (bio == NULL) {
1803 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
1804 dh_file, ERR_error_string(ERR_get_error(), NULL));
1805 return -1;
1806 }
1807 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
1808 BIO_free(bio);
1809#ifndef OPENSSL_NO_DSA
1810 while (dh == NULL) {
1811 DSA *dsa;
1812 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
1813 " trying to parse as DSA params", dh_file,
1814 ERR_error_string(ERR_get_error(), NULL));
1815 bio = BIO_new_file(dh_file, "r");
1816 if (bio == NULL)
1817 break;
1818 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
1819 BIO_free(bio);
1820 if (!dsa) {
1821 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
1822 "'%s': %s", dh_file,
1823 ERR_error_string(ERR_get_error(), NULL));
1824 break;
1825 }
1826
1827 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
1828 dh = DSA_dup_DH(dsa);
1829 DSA_free(dsa);
1830 if (dh == NULL) {
1831 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
1832 "params into DH params");
1833 break;
1834 }
1835 break;
1836 }
1837#endif /* !OPENSSL_NO_DSA */
1838 if (dh == NULL) {
1839 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
1840 "'%s'", dh_file);
1841 return -1;
1842 }
1843
1844 if (SSL_CTX_set_tmp_dh(ssl_ctx, dh) != 1) {
1845 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
1846 "%s", dh_file,
1847 ERR_error_string(ERR_get_error(), NULL));
1848 DH_free(dh);
1849 return -1;
1850 }
1851 DH_free(dh);
1852 return 0;
1853#endif /* OPENSSL_NO_DH */
1854}
1855
1856
1857int tls_connection_get_keys(void *ssl_ctx, struct tls_connection *conn,
1858 struct tls_keys *keys)
1859{
1860 SSL *ssl;
1861
1862 if (conn == NULL || keys == NULL)
1863 return -1;
1864 ssl = conn->ssl;
1865 if (ssl == NULL || ssl->s3 == NULL || ssl->session == NULL)
1866 return -1;
1867
1868 os_memset(keys, 0, sizeof(*keys));
1869 keys->master_key = ssl->session->master_key;
1870 keys->master_key_len = ssl->session->master_key_length;
1871 keys->client_random = ssl->s3->client_random;
1872 keys->client_random_len = SSL3_RANDOM_SIZE;
1873 keys->server_random = ssl->s3->server_random;
1874 keys->server_random_len = SSL3_RANDOM_SIZE;
1875
1876 return 0;
1877}
1878
1879
1880int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
1881 const char *label, int server_random_first,
1882 u8 *out, size_t out_len)
1883{
1884 return -1;
1885}
1886
1887
1888u8 * tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn,
1889 const u8 *in_data, size_t in_len,
1890 size_t *out_len, u8 **appl_data,
1891 size_t *appl_data_len)
1892{
1893 int res;
1894 u8 *out_data;
1895
1896 if (appl_data)
1897 *appl_data = NULL;
1898
1899 /*
1900 * Give TLS handshake data from the server (if available) to OpenSSL
1901 * for processing.
1902 */
1903 if (in_data &&
1904 BIO_write(conn->ssl_in, in_data, in_len) < 0) {
1905 tls_show_errors(MSG_INFO, __func__,
1906 "Handshake failed - BIO_write");
1907 return NULL;
1908 }
1909
1910 /* Initiate TLS handshake or continue the existing handshake */
1911 res = SSL_connect(conn->ssl);
1912 if (res != 1) {
1913 int err = SSL_get_error(conn->ssl, res);
1914 if (err == SSL_ERROR_WANT_READ)
1915 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want "
1916 "more data");
1917 else if (err == SSL_ERROR_WANT_WRITE)
1918 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to "
1919 "write");
1920 else {
1921 tls_show_errors(MSG_INFO, __func__, "SSL_connect");
1922 conn->failed++;
1923 }
1924 }
1925
1926 /* Get the TLS handshake data to be sent to the server */
1927 res = BIO_ctrl_pending(conn->ssl_out);
1928 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
1929 out_data = os_malloc(res == 0 ? 1 : res);
1930 if (out_data == NULL) {
1931 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
1932 "handshake output (%d bytes)", res);
1933 if (BIO_reset(conn->ssl_out) < 0) {
1934 tls_show_errors(MSG_INFO, __func__,
1935 "BIO_reset failed");
1936 }
1937 *out_len = 0;
1938 return NULL;
1939 }
1940 res = res == 0 ? 0 : BIO_read(conn->ssl_out, out_data, res);
1941 if (res < 0) {
1942 tls_show_errors(MSG_INFO, __func__,
1943 "Handshake failed - BIO_read");
1944 if (BIO_reset(conn->ssl_out) < 0) {
1945 tls_show_errors(MSG_INFO, __func__,
1946 "BIO_reset failed");
1947 }
1948 *out_len = 0;
1949 return NULL;
1950 }
1951 *out_len = res;
1952
1953 if (SSL_is_init_finished(conn->ssl) && appl_data) {
1954 *appl_data = os_malloc(in_len);
1955 if (*appl_data) {
1956 res = SSL_read(conn->ssl, *appl_data, in_len);
1957 if (res < 0) {
1958 tls_show_errors(MSG_INFO, __func__,
1959 "Failed to read possible "
1960 "Application Data");
1961 os_free(*appl_data);
1962 *appl_data = NULL;
1963 } else {
1964 *appl_data_len = res;
1965 wpa_hexdump_key(MSG_MSGDUMP, "SSL: Application"
1966 " Data in Finish message",
1967 *appl_data, *appl_data_len);
1968 }
1969 }
1970 }
1971
1972 return out_data;
1973}
1974
1975
1976u8 * tls_connection_server_handshake(void *ssl_ctx,
1977 struct tls_connection *conn,
1978 const u8 *in_data, size_t in_len,
1979 size_t *out_len)
1980{
1981 int res;
1982 u8 *out_data;
1983 char buf[10];
1984
1985 if (in_data &&
1986 BIO_write(conn->ssl_in, in_data, in_len) < 0) {
1987 tls_show_errors(MSG_INFO, __func__,
1988 "Handshake failed - BIO_write");
1989 return NULL;
1990 }
1991
1992 res = SSL_read(conn->ssl, buf, sizeof(buf));
1993 if (res >= 0) {
1994 wpa_printf(MSG_DEBUG, "SSL: Unexpected data from SSL_read "
1995 "(res=%d)", res);
1996 }
1997
1998 res = BIO_ctrl_pending(conn->ssl_out);
1999 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
2000 out_data = os_malloc(res == 0 ? 1 : res);
2001 if (out_data == NULL) {
2002 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
2003 "handshake output (%d bytes)", res);
2004 if (BIO_reset(conn->ssl_out) < 0) {
2005 tls_show_errors(MSG_INFO, __func__,
2006 "BIO_reset failed");
2007 }
2008 *out_len = 0;
2009 return NULL;
2010 }
2011 res = res == 0 ? 0 : BIO_read(conn->ssl_out, out_data, res);
2012 if (res < 0) {
2013 tls_show_errors(MSG_INFO, __func__,
2014 "Handshake failed - BIO_read");
2015 if (BIO_reset(conn->ssl_out) < 0) {
2016 tls_show_errors(MSG_INFO, __func__,
2017 "BIO_reset failed");
2018 }
2019 *out_len = 0;
2020 return NULL;
2021 }
2022 *out_len = res;
2023 return out_data;
2024}
2025
2026
2027int tls_connection_encrypt(void *ssl_ctx, struct tls_connection *conn,
2028 const u8 *in_data, size_t in_len,
2029 u8 *out_data, size_t out_len)
2030{
2031 int res;
2032
2033 if (conn == NULL)
2034 return -1;
2035
2036 /* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */
2037 if ((res = BIO_reset(conn->ssl_in)) < 0 ||
2038 (res = BIO_reset(conn->ssl_out)) < 0) {
2039 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
2040 return res;
2041 }
2042 res = SSL_write(conn->ssl, in_data, in_len);
2043 if (res < 0) {
2044 tls_show_errors(MSG_INFO, __func__,
2045 "Encryption failed - SSL_write");
2046 return res;
2047 }
2048
2049 /* Read encrypted data to be sent to the server */
2050 res = BIO_read(conn->ssl_out, out_data, out_len);
2051 if (res < 0) {
2052 tls_show_errors(MSG_INFO, __func__,
2053 "Encryption failed - BIO_read");
2054 return res;
2055 }
2056
2057 return res;
2058}
2059
2060
2061int tls_connection_decrypt(void *ssl_ctx, struct tls_connection *conn,
2062 const u8 *in_data, size_t in_len,
2063 u8 *out_data, size_t out_len)
2064{
2065 int res;
2066
2067 /* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */
2068 res = BIO_write(conn->ssl_in, in_data, in_len);
2069 if (res < 0) {
2070 tls_show_errors(MSG_INFO, __func__,
2071 "Decryption failed - BIO_write");
2072 return res;
2073 }
2074 if (BIO_reset(conn->ssl_out) < 0) {
2075 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
2076 return res;
2077 }
2078
2079 /* Read decrypted data for further processing */
2080 res = SSL_read(conn->ssl, out_data, out_len);
2081 if (res < 0) {
2082 tls_show_errors(MSG_INFO, __func__,
2083 "Decryption failed - SSL_read");
2084 return res;
2085 }
2086
2087 return res;
2088}
2089
2090
2091int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn)
2092{
2093 return conn ? conn->ssl->hit : 0;
2094}
2095
2096
2097int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
2098 u8 *ciphers)
2099{
2100 char buf[100], *pos, *end;
2101 u8 *c;
2102 int ret;
2103
2104 if (conn == NULL || conn->ssl == NULL || ciphers == NULL)
2105 return -1;
2106
2107 buf[0] = '\0';
2108 pos = buf;
2109 end = pos + sizeof(buf);
2110
2111 c = ciphers;
2112 while (*c != TLS_CIPHER_NONE) {
2113 const char *suite;
2114
2115 switch (*c) {
2116 case TLS_CIPHER_RC4_SHA:
2117 suite = "RC4-SHA";
2118 break;
2119 case TLS_CIPHER_AES128_SHA:
2120 suite = "AES128-SHA";
2121 break;
2122 case TLS_CIPHER_RSA_DHE_AES128_SHA:
2123 suite = "DHE-RSA-AES128-SHA";
2124 break;
2125 case TLS_CIPHER_ANON_DH_AES128_SHA:
2126 suite = "ADH-AES128-SHA";
2127 break;
2128 default:
2129 wpa_printf(MSG_DEBUG, "TLS: Unsupported "
2130 "cipher selection: %d", *c);
2131 return -1;
2132 }
2133 ret = os_snprintf(pos, end - pos, ":%s", suite);
2134 if (ret < 0 || ret >= end - pos)
2135 break;
2136 pos += ret;
2137
2138 c++;
2139 }
2140
2141 wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1);
2142
2143 if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) {
2144 tls_show_errors(MSG_INFO, __func__,
2145 "Cipher suite configuration failed");
2146 return -1;
2147 }
2148
2149 return 0;
2150}
2151
2152
2153int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn,
2154 char *buf, size_t buflen)
2155{
2156 const char *name;
2157 if (conn == NULL || conn->ssl == NULL)
2158 return -1;
2159
2160 name = SSL_get_cipher(conn->ssl);
2161 if (name == NULL)
2162 return -1;
2163
2164 os_strlcpy(buf, name, buflen);
2165 return 0;
2166}
2167
2168
2169int tls_connection_enable_workaround(void *ssl_ctx,
2170 struct tls_connection *conn)
2171{
2172 SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
2173
2174 return 0;
2175}
2176
2177
2178#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC)
2179/* ClientHello TLS extensions require a patch to openssl, so this function is
2180 * commented out unless explicitly needed for EAP-FAST in order to be able to
2181 * build this file with unmodified openssl. */
2182int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn,
2183 int ext_type, const u8 *data,
2184 size_t data_len)
2185{
2186 if (conn == NULL || conn->ssl == NULL)
2187 return -1;
2188
2189 if (SSL_set_hello_extension(conn->ssl, ext_type, (void *) data,
2190 data_len) != 1)
2191 return -1;
2192
2193 return 0;
2194}
2195#endif /* EAP_FAST || EAP_FAST_DYNAMIC */
2196
2197
2198int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn)
2199{
2200 if (conn == NULL)
2201 return -1;
2202 return conn->failed;
2203}
2204
2205
2206int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn)
2207{
2208 if (conn == NULL)
2209 return -1;
2210 return conn->read_alerts;
2211}
2212
2213
2214int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn)
2215{
2216 if (conn == NULL)
2217 return -1;
2218 return conn->write_alerts;
2219}
2220
2221
2222int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
2223 const struct tls_connection_params *params)
2224{
2225 int ret;
2226 unsigned long err;
2227
2228 if (conn == NULL)
2229 return -1;
2230
2231 while ((err = ERR_get_error())) {
2232 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
2233 __func__, ERR_error_string(err, NULL));
2234 }
2235
2236 if (tls_connection_set_subject_match(conn,
2237 params->subject_match,
2238 params->altsubject_match))
2239 return -1;
2240 if (tls_connection_ca_cert(tls_ctx, conn, params->ca_cert,
2241 params->ca_cert_blob,
2242 params->ca_cert_blob_len,
2243 params->ca_path))
2244 return -1;
2245 if (tls_connection_client_cert(conn, params->client_cert,
2246 params->client_cert_blob,
2247 params->client_cert_blob_len))
2248 return -1;
2249
2250 if (params->engine) {
2251 wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine");
2252 ret = tls_engine_init(conn, params->engine_id, params->pin,
2253 params->key_id);
2254 if (ret)
2255 return ret;
2256 if (tls_connection_engine_private_key(conn))
2257 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
2258 } else if (tls_connection_private_key(tls_ctx, conn,
2259 params->private_key,
2260 params->private_key_passwd,
2261 params->private_key_blob,
2262 params->private_key_blob_len)) {
2263 wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'",
2264 params->private_key);
2265 return -1;
2266 }
2267
2268 if (tls_connection_dh(conn, params->dh_file)) {
2269 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
2270 params->dh_file);
2271 return -1;
2272 }
2273
2274 tls_get_errors(tls_ctx);
2275
2276 return 0;
2277}
2278
2279
2280int tls_global_set_params(void *tls_ctx,
2281 const struct tls_connection_params *params)
2282{
2283 SSL_CTX *ssl_ctx = tls_ctx;
2284 unsigned long err;
2285
2286 while ((err = ERR_get_error())) {
2287 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
2288 __func__, ERR_error_string(err, NULL));
2289 }
2290
2291 if (tls_global_ca_cert(ssl_ctx, params->ca_cert))
2292 return -1;
2293
2294 if (tls_global_client_cert(ssl_ctx, params->client_cert))
2295 return -1;
2296
2297 if (tls_global_private_key(ssl_ctx, params->private_key,
2298 params->private_key_passwd))
2299 return -1;
2300
2301 if (tls_global_dh(ssl_ctx, params->dh_file)) {
2302 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
2303 params->dh_file);
2304 return -1;
2305 }
2306
2307 return 0;
2308}
2309
2310
2311int tls_connection_get_keyblock_size(void *tls_ctx,
2312 struct tls_connection *conn)
2313{
2314 const EVP_CIPHER *c;
2315 const EVP_MD *h;
2316
2317 if (conn == NULL || conn->ssl == NULL ||
2318 conn->ssl->enc_read_ctx == NULL ||
2319 conn->ssl->enc_read_ctx->cipher == NULL ||
2320 conn->ssl->read_hash == NULL)
2321 return -1;
2322
2323 c = conn->ssl->enc_read_ctx->cipher;
2324#if OPENSSL_VERSION_NUMBER >= 0x00909000L
2325 h = EVP_MD_CTX_md(conn->ssl->read_hash);
2326#else
2327 h = conn->ssl->read_hash;
2328#endif
2329
2330 return 2 * (EVP_CIPHER_key_length(c) +
2331 EVP_MD_size(h) +
2332 EVP_CIPHER_iv_length(c));
2333}
2334
2335
2336unsigned int tls_capabilities(void *tls_ctx)
2337{
2338 return 0;
2339}
2340
2341
2342int tls_connection_set_ia(void *tls_ctx, struct tls_connection *conn,
2343 int tls_ia)
2344{
2345 return -1;
2346}
2347
2348
2349int tls_connection_ia_send_phase_finished(void *tls_ctx,
2350 struct tls_connection *conn,
2351 int final,
2352 u8 *out_data, size_t out_len)
2353{
2354 return -1;
2355}
2356
2357
2358int tls_connection_ia_final_phase_finished(void *tls_ctx,
2359 struct tls_connection *conn)
2360{
2361 return -1;
2362}
2363
2364
2365int tls_connection_ia_permute_inner_secret(void *tls_ctx,
2366 struct tls_connection *conn,
2367 const u8 *key, size_t key_len)
2368{
2369 return -1;
2370}
2371
2372
2373#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC)
2374/* Pre-shared secred requires a patch to openssl, so this function is
2375 * commented out unless explicitly needed for EAP-FAST in order to be able to
2376 * build this file with unmodified openssl. */
2377
2378static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
2379 STACK_OF(SSL_CIPHER) *peer_ciphers,
2380 SSL_CIPHER **cipher, void *arg)
2381{
2382 struct tls_connection *conn = arg;
2383 int ret;
2384
2385 if (conn == NULL || conn->session_ticket_cb == NULL)
2386 return 0;
2387
2388 ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx,
2389 conn->session_ticket,
2390 conn->session_ticket_len,
2391 s->s3->client_random,
2392 s->s3->server_random, secret);
2393 os_free(conn->session_ticket);
2394 conn->session_ticket = NULL;
2395
2396 if (ret <= 0)
2397 return 0;
2398
2399 *secret_len = SSL_MAX_MASTER_KEY_LENGTH;
2400 return 1;
2401}
2402
2403
2404#ifdef SSL_OP_NO_TICKET
2405static void tls_hello_ext_cb(SSL *s, int client_server, int type,
2406 unsigned char *data, int len, void *arg)
2407{
2408 struct tls_connection *conn = arg;
2409
2410 if (conn == NULL || conn->session_ticket_cb == NULL)
2411 return;
2412
2413 wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__,
2414 type, len);
2415
2416 if (type == TLSEXT_TYPE_session_ticket && !client_server) {
2417 os_free(conn->session_ticket);
2418 conn->session_ticket = NULL;
2419
2420 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
2421 "extension", data, len);
2422 conn->session_ticket = os_malloc(len);
2423 if (conn->session_ticket == NULL)
2424 return;
2425
2426 os_memcpy(conn->session_ticket, data, len);
2427 conn->session_ticket_len = len;
2428 }
2429}
2430#else /* SSL_OP_NO_TICKET */
2431static int tls_hello_ext_cb(SSL *s, TLS_EXTENSION *ext, void *arg)
2432{
2433 struct tls_connection *conn = arg;
2434
2435 if (conn == NULL || conn->session_ticket_cb == NULL)
2436 return 0;
2437
2438 wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__,
2439 ext->type, ext->length);
2440
2441 os_free(conn->session_ticket);
2442 conn->session_ticket = NULL;
2443
2444 if (ext->type == 35) {
2445 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
2446 "extension", ext->data, ext->length);
2447 conn->session_ticket = os_malloc(ext->length);
2448 if (conn->session_ticket == NULL)
2449 return SSL_AD_INTERNAL_ERROR;
2450
2451 os_memcpy(conn->session_ticket, ext->data, ext->length);
2452 conn->session_ticket_len = ext->length;
2453 }
2454
2455 return 0;
2456}
2457#endif /* SSL_OP_NO_TICKET */
2458#endif /* EAP_FAST || EAP_FAST_DYNAMIC */
2459
2460
2461int tls_connection_set_session_ticket_cb(void *tls_ctx,
2462 struct tls_connection *conn,
2463 tls_session_ticket_cb cb,
2464 void *ctx)
2465{
2466#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC)
2467 conn->session_ticket_cb = cb;
2468 conn->session_ticket_cb_ctx = ctx;
2469
2470 if (cb) {
2471 if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb,
2472 conn) != 1)
2473 return -1;
2474#ifdef SSL_OP_NO_TICKET
2475 SSL_set_tlsext_debug_callback(conn->ssl, tls_hello_ext_cb);
2476 SSL_set_tlsext_debug_arg(conn->ssl, conn);
2477#else /* SSL_OP_NO_TICKET */
2478 if (SSL_set_hello_extension_cb(conn->ssl, tls_hello_ext_cb,
2479 conn) != 1)
2480 return -1;
2481#endif /* SSL_OP_NO_TICKET */
2482 } else {
2483 if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1)
2484 return -1;
2485#ifdef SSL_OP_NO_TICKET
2486 SSL_set_tlsext_debug_callback(conn->ssl, NULL);
2487 SSL_set_tlsext_debug_arg(conn->ssl, conn);
2488#else /* SSL_OP_NO_TICKET */
2489 if (SSL_set_hello_extension_cb(conn->ssl, NULL, NULL) != 1)
2490 return -1;
2491#endif /* SSL_OP_NO_TICKET */
2492 }
2493
2494 return 0;
2495#else /* EAP_FAST || EAP_FAST_DYNAMIC */
2496 return -1;
2497#endif /* EAP_FAST || EAP_FAST_DYNAMIC */
2498}
Unnamed repository; edit this file 'description' to name the repository.