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[thirdparty/hostap.git] / src / crypto / tls_openssl.c
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6fc6879b 1/*
81c85c06 2 * SSL/TLS interface functions for OpenSSL
080585c0 3 * Copyright (c) 2004-2013, Jouni Malinen <j@w1.fi>
6fc6879b 4 *
0f3d578e
JM		 5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
6fc6879b
JM		 7 */
8
9#include "includes.h"
10
11#ifndef CONFIG_SMARTCARD
12#ifndef OPENSSL_NO_ENGINE
13#define OPENSSL_NO_ENGINE
14#endif
15#endif
16
17#include <openssl/ssl.h>
18#include <openssl/err.h>
19#include <openssl/pkcs12.h>
20#include <openssl/x509v3.h>
21#ifndef OPENSSL_NO_ENGINE
22#include <openssl/engine.h>
23#endif /* OPENSSL_NO_ENGINE */
24
2a0cd067
DS		 25#ifdef ANDROID
26#include <openssl/pem.h>
27#include "keystore_get.h"
28#endif /* ANDROID */
29
6fc6879b 30#include "common.h"
00468b46 31#include "crypto.h"
6fc6879b
JM		 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
7c0e1e27
PS		 40#if defined(SSL_CTX_get_app_data) && defined(SSL_CTX_set_app_data)
41#define OPENSSL_SUPPORTS_CTX_APP_DATA
42#endif
43
191a8ad7 44#ifdef SSL_F_SSL_SET_SESSION_TICKET_EXT
0cf03892
JM		 45#ifdef SSL_OP_NO_TICKET
46/*
47 * Session ticket override patch was merged into OpenSSL 0.9.9 tree on
48 * 2008-11-15. This version uses a bit different API compared to the old patch.
49 */
50#define CONFIG_OPENSSL_TICKET_OVERRIDE
51#endif
52#endif
53
080585c0
JM		 54#ifdef SSL_set_tlsext_status_type
55#ifndef OPENSSL_NO_TLSEXT
56#define HAVE_OCSP
57#include <openssl/ocsp.h>
58#endif /* OPENSSL_NO_TLSEXT */
59#endif /* SSL_set_tlsext_status_type */
60
6fc6879b
JM		 61static int tls_openssl_ref_count = 0;
62
7c0e1e27 63struct tls_context {
00468b46
JM		 64 void (*event_cb)(void *ctx, enum tls_event ev,
65 union tls_event_data *data);
66 void *cb_ctx;
1b414f59 67 int cert_in_cb;
080585c0 68 char *ocsp_stapling_response;
00468b46
JM		 69};
70
7c0e1e27 71static struct tls_context *tls_global = NULL;
00468b46
JM		 72
73
6fc6879b 74struct tls_connection {
7c0e1e27 75 struct tls_context *context;
6fc6879b
JM		 76 SSL *ssl;
77 BIO *ssl_in, *ssl_out;
78#ifndef OPENSSL_NO_ENGINE
79 ENGINE *engine; /* functional reference to the engine */
80 EVP_PKEY *private_key; /* the private key if using engine */
81#endif /* OPENSSL_NO_ENGINE */
01f809c7 82 char *subject_match, *altsubject_match, *suffix_match;
6fc6879b
JM		 83 int read_alerts, write_alerts, failed;
84
85 tls_session_ticket_cb session_ticket_cb;
86 void *session_ticket_cb_ctx;
87
88 /* SessionTicket received from OpenSSL hello_extension_cb (server) */
89 u8 *session_ticket;
90 size_t session_ticket_len;
00468b46 91
8d6399e4
JM		 92 unsigned int ca_cert_verify:1;
93 unsigned int cert_probe:1;
94 unsigned int server_cert_only:1;
00468b46
JM		 95
96 u8 srv_cert_hash[32];
235279e7
JM		 97
98 unsigned int flags;
080585c0
JM		 99
100 X509 *peer_cert;
101 X509 *peer_issuer;
6fc6879b
JM		 102};
103
104
7c0e1e27
PS		 105static struct tls_context * tls_context_new(const struct tls_config *conf)
106{
107 struct tls_context *context = os_zalloc(sizeof(*context));
108 if (context == NULL)
109 return NULL;
110 if (conf) {
111 context->event_cb = conf->event_cb;
112 context->cb_ctx = conf->cb_ctx;
113 context->cert_in_cb = conf->cert_in_cb;
114 }
115 return context;
116}
117
118
6fc6879b
JM		 119#ifdef CONFIG_NO_STDOUT_DEBUG
120
121static void _tls_show_errors(void)
122{
123 unsigned long err;
124
125 while ((err = ERR_get_error())) {
126 /* Just ignore the errors, since stdout is disabled */
127 }
128}
129#define tls_show_errors(l, f, t) _tls_show_errors()
130
131#else /* CONFIG_NO_STDOUT_DEBUG */
132
133static void tls_show_errors(int level, const char *func, const char *txt)
134{
135 unsigned long err;
136
137 wpa_printf(level, "OpenSSL: %s - %s %s",
138 func, txt, ERR_error_string(ERR_get_error(), NULL));
139
140 while ((err = ERR_get_error())) {
141 wpa_printf(MSG_INFO, "OpenSSL: pending error: %s",
142 ERR_error_string(err, NULL));
143 }
144}
145
146#endif /* CONFIG_NO_STDOUT_DEBUG */
147
148
149#ifdef CONFIG_NATIVE_WINDOWS
150
151/* Windows CryptoAPI and access to certificate stores */
152#include <wincrypt.h>
153
154#ifdef __MINGW32_VERSION
155/*
156 * MinGW does not yet include all the needed definitions for CryptoAPI, so
157 * define here whatever extra is needed.
158 */
6fc6879b
JM		 159#define CERT_SYSTEM_STORE_CURRENT_USER (1 << 16)
160#define CERT_STORE_READONLY_FLAG 0x00008000
161#define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000
6fc6879b
JM		 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
6fc6879b
JM		 392 if (!CryptAcquireCertificatePrivateKey(priv->cert,
393 CRYPT_ACQUIRE_COMPARE_KEY_FLAG,
394 NULL, &priv->crypt_prov,
395 &priv->key_spec,
396 &priv->free_crypt_prov)) {
397 cryptoapi_error("Failed to acquire a private key for the "
398 "certificate");
399 goto err;
400 }
401
402 rsa_meth->name = "Microsoft CryptoAPI RSA Method";
403 rsa_meth->rsa_pub_enc = cryptoapi_rsa_pub_enc;
404 rsa_meth->rsa_pub_dec = cryptoapi_rsa_pub_dec;
405 rsa_meth->rsa_priv_enc = cryptoapi_rsa_priv_enc;
406 rsa_meth->rsa_priv_dec = cryptoapi_rsa_priv_dec;
407 rsa_meth->finish = cryptoapi_finish;
408 rsa_meth->flags = RSA_METHOD_FLAG_NO_CHECK;
409 rsa_meth->app_data = (char *) priv;
410
411 rsa = RSA_new();
412 if (rsa == NULL) {
413 SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE,
414 ERR_R_MALLOC_FAILURE);
415 goto err;
416 }
417
418 if (!SSL_use_certificate(ssl, cert)) {
419 RSA_free(rsa);
420 rsa = NULL;
421 goto err;
422 }
423 pub_rsa = cert->cert_info->key->pkey->pkey.rsa;
424 X509_free(cert);
425 cert = NULL;
426
427 rsa->n = BN_dup(pub_rsa->n);
428 rsa->e = BN_dup(pub_rsa->e);
429 if (!RSA_set_method(rsa, rsa_meth))
430 goto err;
431
432 if (!SSL_use_RSAPrivateKey(ssl, rsa))
433 goto err;
434 RSA_free(rsa);
435
436 return 0;
437
438err:
439 if (cert)
440 X509_free(cert);
441 if (rsa)
442 RSA_free(rsa);
443 else {
444 os_free(rsa_meth);
445 cryptoapi_free_data(priv);
446 }
447 return -1;
448}
449
450
451static int tls_cryptoapi_ca_cert(SSL_CTX *ssl_ctx, SSL *ssl, const char *name)
452{
453 HCERTSTORE cs;
454 PCCERT_CONTEXT ctx = NULL;
455 X509 *cert;
456 char buf[128];
457 const char *store;
458#ifdef UNICODE
459 WCHAR *wstore;
460#endif /* UNICODE */
461
6fc6879b
JM		 462 if (name == NULL || strncmp(name, "cert_store://", 13) != 0)
463 return -1;
464
465 store = name + 13;
466#ifdef UNICODE
467 wstore = os_malloc((os_strlen(store) + 1) * sizeof(WCHAR));
468 if (wstore == NULL)
469 return -1;
470 wsprintf(wstore, L"%S", store);
471 cs = CertOpenSystemStore(0, wstore);
472 os_free(wstore);
473#else /* UNICODE */
474 cs = CertOpenSystemStore(0, store);
475#endif /* UNICODE */
476 if (cs == NULL) {
477 wpa_printf(MSG_DEBUG, "%s: failed to open system cert store "
478 "'%s': error=%d", __func__, store,
479 (int) GetLastError());
480 return -1;
481 }
482
483 while ((ctx = CertEnumCertificatesInStore(cs, ctx))) {
484 cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ctx->pbCertEncoded,
485 ctx->cbCertEncoded);
486 if (cert == NULL) {
487 wpa_printf(MSG_INFO, "CryptoAPI: Could not process "
488 "X509 DER encoding for CA cert");
489 continue;
490 }
491
492 X509_NAME_oneline(X509_get_subject_name(cert), buf,
493 sizeof(buf));
494 wpa_printf(MSG_DEBUG, "OpenSSL: Loaded CA certificate for "
495 "system certificate store: subject='%s'", buf);
496
497 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
498 tls_show_errors(MSG_WARNING, __func__,
499 "Failed to add ca_cert to OpenSSL "
500 "certificate store");
501 }
502
503 X509_free(cert);
504 }
505
506 if (!CertCloseStore(cs, 0)) {
507 wpa_printf(MSG_DEBUG, "%s: failed to close system cert store "
508 "'%s': error=%d", __func__, name + 13,
509 (int) GetLastError());
510 }
511
512 return 0;
513}
514
515
516#else /* CONFIG_NATIVE_WINDOWS */
517
518static int tls_cryptoapi_cert(SSL *ssl, const char *name)
519{
520 return -1;
521}
522
523#endif /* CONFIG_NATIVE_WINDOWS */
524
525
526static void ssl_info_cb(const SSL *ssl, int where, int ret)
527{
528 const char *str;
529 int w;
530
531 wpa_printf(MSG_DEBUG, "SSL: (where=0x%x ret=0x%x)", where, ret);
532 w = where & ~SSL_ST_MASK;
533 if (w & SSL_ST_CONNECT)
534 str = "SSL_connect";
535 else if (w & SSL_ST_ACCEPT)
536 str = "SSL_accept";
537 else
538 str = "undefined";
539
540 if (where & SSL_CB_LOOP) {
541 wpa_printf(MSG_DEBUG, "SSL: %s:%s",
542 str, SSL_state_string_long(ssl));
543 } else if (where & SSL_CB_ALERT) {
7c0e1e27 544 struct tls_connection *conn = SSL_get_app_data((SSL *) ssl);
6fc6879b
JM		 545 wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s",
546 where & SSL_CB_READ ?
547 "read (remote end reported an error)" :
548 "write (local SSL3 detected an error)",
549 SSL_alert_type_string_long(ret),
550 SSL_alert_desc_string_long(ret));
551 if ((ret >> 8) == SSL3_AL_FATAL) {
6fc6879b
JM		 552 if (where & SSL_CB_READ)
553 conn->read_alerts++;
554 else
555 conn->write_alerts++;
556 }
7c0e1e27 557 if (conn->context->event_cb != NULL) {
dd7fec1f 558 union tls_event_data ev;
7c0e1e27 559 struct tls_context *context = conn->context;
dd7fec1f
PS		 560 os_memset(&ev, 0, sizeof(ev));
561 ev.alert.is_local = !(where & SSL_CB_READ);
562 ev.alert.type = SSL_alert_type_string_long(ret);
563 ev.alert.description = SSL_alert_desc_string_long(ret);
7c0e1e27 564 context->event_cb(context->cb_ctx, TLS_ALERT, &ev);
dd7fec1f 565 }
6fc6879b
JM		 566 } else if (where & SSL_CB_EXIT && ret <= 0) {
567 wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s",
568 str, ret == 0 ? "failed" : "error",
569 SSL_state_string_long(ssl));
570 }
571}
572
573
574#ifndef OPENSSL_NO_ENGINE
575/**
576 * tls_engine_load_dynamic_generic - load any openssl engine
577 * @pre: an array of commands and values that load an engine initialized
578 * in the engine specific function
579 * @post: an array of commands and values that initialize an already loaded
580 * engine (or %NULL if not required)
581 * @id: the engine id of the engine to load (only required if post is not %NULL
582 *
583 * This function is a generic function that loads any openssl engine.
584 *
585 * Returns: 0 on success, -1 on failure
586 */
587static int tls_engine_load_dynamic_generic(const char *pre[],
588 const char *post[], const char *id)
589{
590 ENGINE *engine;
591 const char *dynamic_id = "dynamic";
592
593 engine = ENGINE_by_id(id);
594 if (engine) {
595 ENGINE_free(engine);
596 wpa_printf(MSG_DEBUG, "ENGINE: engine '%s' is already "
597 "available", id);
598 return 0;
599 }
600 ERR_clear_error();
601
602 engine = ENGINE_by_id(dynamic_id);
603 if (engine == NULL) {
604 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
605 dynamic_id,
606 ERR_error_string(ERR_get_error(), NULL));
607 return -1;
608 }
609
610 /* Perform the pre commands. This will load the engine. */
611 while (pre && pre[0]) {
612 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", pre[0], pre[1]);
613 if (ENGINE_ctrl_cmd_string(engine, pre[0], pre[1], 0) == 0) {
614 wpa_printf(MSG_INFO, "ENGINE: ctrl cmd_string failed: "
615 "%s %s [%s]", pre[0], pre[1],
616 ERR_error_string(ERR_get_error(), NULL));
617 ENGINE_free(engine);
618 return -1;
619 }
620 pre += 2;
621 }
622
623 /*
624 * Free the reference to the "dynamic" engine. The loaded engine can
625 * now be looked up using ENGINE_by_id().
626 */
627 ENGINE_free(engine);
628
629 engine = ENGINE_by_id(id);
630 if (engine == NULL) {
631 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
632 id, ERR_error_string(ERR_get_error(), NULL));
633 return -1;
634 }
635
636 while (post && post[0]) {
637 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", post[0], post[1]);
638 if (ENGINE_ctrl_cmd_string(engine, post[0], post[1], 0) == 0) {
639 wpa_printf(MSG_DEBUG, "ENGINE: ctrl cmd_string failed:"
640 " %s %s [%s]", post[0], post[1],
641 ERR_error_string(ERR_get_error(), NULL));
642 ENGINE_remove(engine);
643 ENGINE_free(engine);
644 return -1;
645 }
646 post += 2;
647 }
648 ENGINE_free(engine);
649
650 return 0;
651}
652
653
654/**
655 * tls_engine_load_dynamic_pkcs11 - load the pkcs11 engine provided by opensc
656 * @pkcs11_so_path: pksc11_so_path from the configuration
657 * @pcks11_module_path: pkcs11_module_path from the configuration
658 */
659static int tls_engine_load_dynamic_pkcs11(const char *pkcs11_so_path,
660 const char *pkcs11_module_path)
661{
662 char *engine_id = "pkcs11";
663 const char *pre_cmd[] = {
664 "SO_PATH", NULL /* pkcs11_so_path */,
665 "ID", NULL /* engine_id */,
666 "LIST_ADD", "1",
667 /* "NO_VCHECK", "1", */
668 "LOAD", NULL,
669 NULL, NULL
670 };
671 const char *post_cmd[] = {
672 "MODULE_PATH", NULL /* pkcs11_module_path */,
673 NULL, NULL
674 };
675
676 if (!pkcs11_so_path || !pkcs11_module_path)
677 return 0;
678
679 pre_cmd[1] = pkcs11_so_path;
680 pre_cmd[3] = engine_id;
681 post_cmd[1] = pkcs11_module_path;
682
683 wpa_printf(MSG_DEBUG, "ENGINE: Loading pkcs11 Engine from %s",
684 pkcs11_so_path);
685
686 return tls_engine_load_dynamic_generic(pre_cmd, post_cmd, engine_id);
687}
688
689
690/**
691 * tls_engine_load_dynamic_opensc - load the opensc engine provided by opensc
692 * @opensc_so_path: opensc_so_path from the configuration
693 */
694static int tls_engine_load_dynamic_opensc(const char *opensc_so_path)
695{
696 char *engine_id = "opensc";
697 const char *pre_cmd[] = {
698 "SO_PATH", NULL /* opensc_so_path */,
699 "ID", NULL /* engine_id */,
700 "LIST_ADD", "1",
701 "LOAD", NULL,
702 NULL, NULL
703 };
704
705 if (!opensc_so_path)
706 return 0;
707
708 pre_cmd[1] = opensc_so_path;
709 pre_cmd[3] = engine_id;
710
711 wpa_printf(MSG_DEBUG, "ENGINE: Loading OpenSC Engine from %s",
712 opensc_so_path);
713
714 return tls_engine_load_dynamic_generic(pre_cmd, NULL, engine_id);
715}
716#endif /* OPENSSL_NO_ENGINE */
717
718
719void * tls_init(const struct tls_config *conf)
720{
721 SSL_CTX *ssl;
7c0e1e27 722 struct tls_context *context;
6fc6879b
JM		 723
724 if (tls_openssl_ref_count == 0) {
7c0e1e27
PS		 725 tls_global = context = tls_context_new(conf);
726 if (context == NULL)
00468b46 727 return NULL;
76f04b38
JM		 728#ifdef CONFIG_FIPS
729#ifdef OPENSSL_FIPS
cf123d7f 730 if (conf && conf->fips_mode) {
76f04b38
JM		 731 if (!FIPS_mode_set(1)) {
732 wpa_printf(MSG_ERROR, "Failed to enable FIPS "
733 "mode");
734 ERR_load_crypto_strings();
735 ERR_print_errors_fp(stderr);
b36540db
JM		 736 os_free(tls_global);
737 tls_global = NULL;
76f04b38
JM		 738 return NULL;
739 } else
740 wpa_printf(MSG_INFO, "Running in FIPS mode");
741 }
742#else /* OPENSSL_FIPS */
cf123d7f 743 if (conf && conf->fips_mode) {
76f04b38
JM		 744 wpa_printf(MSG_ERROR, "FIPS mode requested, but not "
745 "supported");
b36540db
JM		 746 os_free(tls_global);
747 tls_global = NULL;
76f04b38
JM		 748 return NULL;
749 }
750#endif /* OPENSSL_FIPS */
751#endif /* CONFIG_FIPS */
6fc6879b
JM		 752 SSL_load_error_strings();
753 SSL_library_init();
4bb3377b 754#if (OPENSSL_VERSION_NUMBER >= 0x0090800fL) && !defined(OPENSSL_NO_SHA256)
e1ffdfc1
JM		 755 EVP_add_digest(EVP_sha256());
756#endif /* OPENSSL_NO_SHA256 */
6fc6879b
JM		 757 /* TODO: if /dev/urandom is available, PRNG is seeded
758 * automatically. If this is not the case, random data should
759 * be added here. */
760
761#ifdef PKCS12_FUNCS
1056dad7
JM		 762#ifndef OPENSSL_NO_RC2
763 /*
764 * 40-bit RC2 is commonly used in PKCS#12 files, so enable it.
765 * This is enabled by PKCS12_PBE_add() in OpenSSL 0.9.8
766 * versions, but it looks like OpenSSL 1.0.0 does not do that
767 * anymore.
768 */
769 EVP_add_cipher(EVP_rc2_40_cbc());
770#endif /* OPENSSL_NO_RC2 */
6fc6879b
JM		 771 PKCS12_PBE_add();
772#endif /* PKCS12_FUNCS */
7c0e1e27
PS		 773 } else {
774 context = tls_global;
775#ifdef OPENSSL_SUPPORTS_CTX_APP_DATA
776 /* Newer OpenSSL can store app-data per-SSL */
777 context = tls_context_new(conf);
778 if (context == NULL)
779 return NULL;
780#endif /* OPENSSL_SUPPORTS_CTX_APP_DATA */
6fc6879b
JM		 781 }
782 tls_openssl_ref_count++;
783
784 ssl = SSL_CTX_new(TLSv1_method());
7c0e1e27
PS		 785 if (ssl == NULL) {
786 tls_openssl_ref_count--;
787 if (tls_openssl_ref_count == 0) {
788 os_free(tls_global);
789 tls_global = NULL;
790 } else if (context != tls_global) {
791 os_free(context);
792 }
6fc6879b 793 return NULL;
7c0e1e27 794 }
6fc6879b
JM		 795
796 SSL_CTX_set_info_callback(ssl, ssl_info_cb);
7c0e1e27
PS		 797#ifdef OPENSSL_SUPPORTS_CTX_APP_DATA
798 SSL_CTX_set_app_data(ssl, context);
799#endif /* OPENSSL_SUPPORTS_CTX_APP_DATA */
6fc6879b
JM		 800
801#ifndef OPENSSL_NO_ENGINE
802 if (conf &&
803 (conf->opensc_engine_path || conf->pkcs11_engine_path ||
804 conf->pkcs11_module_path)) {
805 wpa_printf(MSG_DEBUG, "ENGINE: Loading dynamic engine");
806 ERR_load_ENGINE_strings();
807 ENGINE_load_dynamic();
808
809 if (tls_engine_load_dynamic_opensc(conf->opensc_engine_path) ||
810 tls_engine_load_dynamic_pkcs11(conf->pkcs11_engine_path,
811 conf->pkcs11_module_path)) {
812 tls_deinit(ssl);
813 return NULL;
814 }
815 }
816#endif /* OPENSSL_NO_ENGINE */
817
818 return ssl;
819}
820
821
822void tls_deinit(void *ssl_ctx)
823{
824 SSL_CTX *ssl = ssl_ctx;
7c0e1e27
PS		 825#ifdef OPENSSL_SUPPORTS_CTX_APP_DATA
826 struct tls_context *context = SSL_CTX_get_app_data(ssl);
827 if (context != tls_global)
828 os_free(context);
829#endif /* OPENSSL_SUPPORTS_CTX_APP_DATA */
6fc6879b
JM		 830 SSL_CTX_free(ssl);
831
832 tls_openssl_ref_count--;
833 if (tls_openssl_ref_count == 0) {
834#ifndef OPENSSL_NO_ENGINE
835 ENGINE_cleanup();
836#endif /* OPENSSL_NO_ENGINE */
837 CRYPTO_cleanup_all_ex_data();
838 ERR_remove_state(0);
839 ERR_free_strings();
840 EVP_cleanup();
080585c0
JM		 841 os_free(tls_global->ocsp_stapling_response);
842 tls_global->ocsp_stapling_response = NULL;
00468b46
JM		 843 os_free(tls_global);
844 tls_global = NULL;
6fc6879b
JM		 845 }
846}
847
848
849static int tls_engine_init(struct tls_connection *conn, const char *engine_id,
e59c91af
DS		 850 const char *pin, const char *key_id,
851 const char *cert_id, const char *ca_cert_id)
6fc6879b
JM		 852{
853#ifndef OPENSSL_NO_ENGINE
854 int ret = -1;
855 if (engine_id == NULL) {
856 wpa_printf(MSG_ERROR, "ENGINE: Engine ID not set");
857 return -1;
858 }
859 if (pin == NULL) {
860 wpa_printf(MSG_ERROR, "ENGINE: Smartcard PIN not set");
861 return -1;
862 }
863 if (key_id == NULL) {
864 wpa_printf(MSG_ERROR, "ENGINE: Key Id not set");
865 return -1;
866 }
867
868 ERR_clear_error();
869 conn->engine = ENGINE_by_id(engine_id);
870 if (!conn->engine) {
871 wpa_printf(MSG_ERROR, "ENGINE: engine %s not available [%s]",
872 engine_id, ERR_error_string(ERR_get_error(), NULL));
873 goto err;
874 }
875 if (ENGINE_init(conn->engine) != 1) {
876 wpa_printf(MSG_ERROR, "ENGINE: engine init failed "
877 "(engine: %s) [%s]", engine_id,
878 ERR_error_string(ERR_get_error(), NULL));
879 goto err;
880 }
881 wpa_printf(MSG_DEBUG, "ENGINE: engine initialized");
882
883 if (ENGINE_ctrl_cmd_string(conn->engine, "PIN", pin, 0) == 0) {
884 wpa_printf(MSG_ERROR, "ENGINE: cannot set pin [%s]",
885 ERR_error_string(ERR_get_error(), NULL));
886 goto err;
887 }
e59c91af 888 /* load private key first in-case PIN is required for cert */
6fc6879b
JM		 889 conn->private_key = ENGINE_load_private_key(conn->engine,
890 key_id, NULL, NULL);
891 if (!conn->private_key) {
892 wpa_printf(MSG_ERROR, "ENGINE: cannot load private key with id"
893 " '%s' [%s]", key_id,
894 ERR_error_string(ERR_get_error(), NULL));
895 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
896 goto err;
897 }
e59c91af
DS		 898
899 /* handle a certificate and/or CA certificate */
900 if (cert_id || ca_cert_id) {
901 const char *cmd_name = "LOAD_CERT_CTRL";
902
903 /* test if the engine supports a LOAD_CERT_CTRL */
904 if (!ENGINE_ctrl(conn->engine, ENGINE_CTRL_GET_CMD_FROM_NAME,
905 0, (void *)cmd_name, NULL)) {
906 wpa_printf(MSG_ERROR, "ENGINE: engine does not support"
907 " loading certificates");
908 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
909 goto err;
910 }
911 }
912
6fc6879b
JM		 913 return 0;
914
915err:
916 if (conn->engine) {
917 ENGINE_free(conn->engine);
918 conn->engine = NULL;
919 }
920
921 if (conn->private_key) {
922 EVP_PKEY_free(conn->private_key);
923 conn->private_key = NULL;
924 }
925
926 return ret;
927#else /* OPENSSL_NO_ENGINE */
928 return 0;
929#endif /* OPENSSL_NO_ENGINE */
930}
931
932
933static void tls_engine_deinit(struct tls_connection *conn)
934{
935#ifndef OPENSSL_NO_ENGINE
936 wpa_printf(MSG_DEBUG, "ENGINE: engine deinit");
937 if (conn->private_key) {
938 EVP_PKEY_free(conn->private_key);
939 conn->private_key = NULL;
940 }
941 if (conn->engine) {
942 ENGINE_finish(conn->engine);
943 conn->engine = NULL;
944 }
945#endif /* OPENSSL_NO_ENGINE */
946}
947
948
949int tls_get_errors(void *ssl_ctx)
950{
951 int count = 0;
952 unsigned long err;
953
954 while ((err = ERR_get_error())) {
955 wpa_printf(MSG_INFO, "TLS - SSL error: %s",
956 ERR_error_string(err, NULL));
957 count++;
958 }
959
960 return count;
961}
962
963struct tls_connection * tls_connection_init(void *ssl_ctx)
964{
965 SSL_CTX *ssl = ssl_ctx;
966 struct tls_connection *conn;
fca25ef4 967 long options;
7c0e1e27
PS		 968 struct tls_context *context = tls_global;
969#ifdef OPENSSL_SUPPORTS_CTX_APP_DATA
970 context = SSL_CTX_get_app_data(ssl);
971#endif /* OPENSSL_SUPPORTS_CTX_APP_DATA */
6fc6879b
JM		 972
973 conn = os_zalloc(sizeof(*conn));
974 if (conn == NULL)
975 return NULL;
976 conn->ssl = SSL_new(ssl);
977 if (conn->ssl == NULL) {
978 tls_show_errors(MSG_INFO, __func__,
979 "Failed to initialize new SSL connection");
980 os_free(conn);
981 return NULL;
982 }
983
7c0e1e27 984 conn->context = context;
6fc6879b 985 SSL_set_app_data(conn->ssl, conn);
fca25ef4
JM		 986 options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 |
987 SSL_OP_SINGLE_DH_USE;
988#ifdef SSL_OP_NO_COMPRESSION
989 options |= SSL_OP_NO_COMPRESSION;
990#endif /* SSL_OP_NO_COMPRESSION */
991 SSL_set_options(conn->ssl, options);
6fc6879b
JM		 992
993 conn->ssl_in = BIO_new(BIO_s_mem());
994 if (!conn->ssl_in) {
995 tls_show_errors(MSG_INFO, __func__,
996 "Failed to create a new BIO for ssl_in");
997 SSL_free(conn->ssl);
998 os_free(conn);
999 return NULL;
1000 }
1001
1002 conn->ssl_out = BIO_new(BIO_s_mem());
1003 if (!conn->ssl_out) {
1004 tls_show_errors(MSG_INFO, __func__,
1005 "Failed to create a new BIO for ssl_out");
1006 SSL_free(conn->ssl);
1007 BIO_free(conn->ssl_in);
1008 os_free(conn);
1009 return NULL;
1010 }
1011
1012 SSL_set_bio(conn->ssl, conn->ssl_in, conn->ssl_out);
1013
1014 return conn;
1015}
1016
1017
1018void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn)
1019{
1020 if (conn == NULL)
1021 return;
1022 SSL_free(conn->ssl);
1023 tls_engine_deinit(conn);
1024 os_free(conn->subject_match);
1025 os_free(conn->altsubject_match);
01f809c7 1026 os_free(conn->suffix_match);
6fc6879b
JM		 1027 os_free(conn->session_ticket);
1028 os_free(conn);
1029}
1030
1031
1032int tls_connection_established(void *ssl_ctx, struct tls_connection *conn)
1033{
1034 return conn ? SSL_is_init_finished(conn->ssl) : 0;
1035}
1036
1037
1038int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn)
1039{
1040 if (conn == NULL)
1041 return -1;
1042
1043 /* Shutdown previous TLS connection without notifying the peer
1044 * because the connection was already terminated in practice
1045 * and "close notify" shutdown alert would confuse AS. */
1046 SSL_set_quiet_shutdown(conn->ssl, 1);
1047 SSL_shutdown(conn->ssl);
1048 return 0;
1049}
1050
1051
1052static int tls_match_altsubject_component(X509 *cert, int type,
1053 const char *value, size_t len)
1054{
1055 GENERAL_NAME *gen;
1056 void *ext;
1057 int i, found = 0;
1058
1059 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
1060
1061 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
1062 gen = sk_GENERAL_NAME_value(ext, i);
1063 if (gen->type != type)
1064 continue;
1065 if (os_strlen((char *) gen->d.ia5->data) == len &&
1066 os_memcmp(value, gen->d.ia5->data, len) == 0)
1067 found++;
1068 }
1069
1070 return found;
1071}
1072
1073
1074static int tls_match_altsubject(X509 *cert, const char *match)
1075{
1076 int type;
1077 const char *pos, *end;
1078 size_t len;
1079
1080 pos = match;
1081 do {
1082 if (os_strncmp(pos, "EMAIL:", 6) == 0) {
1083 type = GEN_EMAIL;
1084 pos += 6;
1085 } else if (os_strncmp(pos, "DNS:", 4) == 0) {
1086 type = GEN_DNS;
1087 pos += 4;
1088 } else if (os_strncmp(pos, "URI:", 4) == 0) {
1089 type = GEN_URI;
1090 pos += 4;
1091 } else {
1092 wpa_printf(MSG_INFO, "TLS: Invalid altSubjectName "
1093 "match '%s'", pos);
1094 return 0;
1095 }
1096 end = os_strchr(pos, ';');
1097 while (end) {
1098 if (os_strncmp(end + 1, "EMAIL:", 6) == 0 ||
1099 os_strncmp(end + 1, "DNS:", 4) == 0 ||
1100 os_strncmp(end + 1, "URI:", 4) == 0)
1101 break;
1102 end = os_strchr(end + 1, ';');
1103 }
1104 if (end)
1105 len = end - pos;
1106 else
1107 len = os_strlen(pos);
1108 if (tls_match_altsubject_component(cert, type, pos, len) > 0)
1109 return 1;
1110 pos = end + 1;
1111 } while (end);
1112
1113 return 0;
1114}
1115
1116
01f809c7
JM		 1117static int domain_suffix_match(const u8 *val, size_t len, const char *match)
1118{
1119 size_t i, match_len;
1120
1121 /* Check for embedded nuls that could mess up suffix matching */
1122 for (i = 0; i < len; i++) {
1123 if (val[i] == '\0') {
1124 wpa_printf(MSG_DEBUG, "TLS: Embedded null in a string - reject");
1125 return 0;
1126 }
1127 }
1128
1129 match_len = os_strlen(match);
1130 if (match_len > len)
1131 return 0;
1132
1133 if (os_strncasecmp((const char *) val + len - match_len, match,
1134 match_len) != 0)
1135 return 0; /* no match */
1136
1137 if (match_len == len)
1138 return 1; /* exact match */
1139
1140 if (val[len - match_len - 1] == '.')
1141 return 1; /* full label match completes suffix match */
1142
1143 wpa_printf(MSG_DEBUG, "TLS: Reject due to incomplete label match");
1144 return 0;
1145}
1146
1147
1148static int tls_match_suffix(X509 *cert, const char *match)
1149{
1150 GENERAL_NAME *gen;
1151 void *ext;
1152 int i;
1153 int dns_name = 0;
1154 X509_NAME *name;
1155
1156 wpa_printf(MSG_DEBUG, "TLS: Match domain against suffix %s", match);
1157
1158 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
1159
1160 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
1161 gen = sk_GENERAL_NAME_value(ext, i);
1162 if (gen->type != GEN_DNS)
1163 continue;
1164 dns_name++;
1165 wpa_hexdump_ascii(MSG_DEBUG, "TLS: Certificate dNSName",
1166 gen->d.dNSName->data,
1167 gen->d.dNSName->length);
1168 if (domain_suffix_match(gen->d.dNSName->data,
1169 gen->d.dNSName->length, match) == 1) {
1170 wpa_printf(MSG_DEBUG, "TLS: Suffix match in dNSName found");
1171 return 1;
1172 }
1173 }
1174
1175 if (dns_name) {
1176 wpa_printf(MSG_DEBUG, "TLS: None of the dNSName(s) matched");
1177 return 0;
1178 }
1179
1180 name = X509_get_subject_name(cert);
1181 i = -1;
1182 for (;;) {
1183 X509_NAME_ENTRY *e;
1184 ASN1_STRING *cn;
1185
1186 i = X509_NAME_get_index_by_NID(name, NID_commonName, i);
1187 if (i == -1)
1188 break;
1189 e = X509_NAME_get_entry(name, i);
1190 if (e == NULL)
1191 continue;
1192 cn = X509_NAME_ENTRY_get_data(e);
1193 if (cn == NULL)
1194 continue;
1195 wpa_hexdump_ascii(MSG_DEBUG, "TLS: Certificate commonName",
1196 cn->data, cn->length);
1197 if (domain_suffix_match(cn->data, cn->length, match) == 1) {
1198 wpa_printf(MSG_DEBUG, "TLS: Suffix match in commonName found");
1199 return 1;
1200 }
1201 }
1202
1203 wpa_printf(MSG_DEBUG, "TLS: No CommonName suffix match found");
1204 return 0;
1205}
1206
1207
00468b46
JM		 1208static enum tls_fail_reason openssl_tls_fail_reason(int err)
1209{
1210 switch (err) {
1211 case X509_V_ERR_CERT_REVOKED:
1212 return TLS_FAIL_REVOKED;
1213 case X509_V_ERR_CERT_NOT_YET_VALID:
1214 case X509_V_ERR_CRL_NOT_YET_VALID:
1215 return TLS_FAIL_NOT_YET_VALID;
1216 case X509_V_ERR_CERT_HAS_EXPIRED:
1217 case X509_V_ERR_CRL_HAS_EXPIRED:
1218 return TLS_FAIL_EXPIRED;
1219 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
1220 case X509_V_ERR_UNABLE_TO_GET_CRL:
1221 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
1222 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
1223 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
1224 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
1225 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
1226 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
1227 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
1228 case X509_V_ERR_INVALID_CA:
1229 return TLS_FAIL_UNTRUSTED;
1230 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
1231 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
1232 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
1233 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
1234 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
1235 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
1236 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
1237 case X509_V_ERR_CERT_UNTRUSTED:
1238 case X509_V_ERR_CERT_REJECTED:
1239 return TLS_FAIL_BAD_CERTIFICATE;
1240 default:
1241 return TLS_FAIL_UNSPECIFIED;
1242 }
1243}
1244
1245
1246static struct wpabuf * get_x509_cert(X509 *cert)
1247{
1248 struct wpabuf *buf;
1249 u8 *tmp;
1250
1251 int cert_len = i2d_X509(cert, NULL);
1252 if (cert_len <= 0)
1253 return NULL;
1254
1255 buf = wpabuf_alloc(cert_len);
1256 if (buf == NULL)
1257 return NULL;
1258
1259 tmp = wpabuf_put(buf, cert_len);
1260 i2d_X509(cert, &tmp);
1261 return buf;
1262}
1263
1264
1265static void openssl_tls_fail_event(struct tls_connection *conn,
1266 X509 *err_cert, int err, int depth,
1267 const char *subject, const char *err_str,
1268 enum tls_fail_reason reason)
1269{
1270 union tls_event_data ev;
1271 struct wpabuf *cert = NULL;
7c0e1e27 1272 struct tls_context *context = conn->context;
00468b46 1273
7c0e1e27 1274 if (context->event_cb == NULL)
00468b46
JM		 1275 return;
1276
1277 cert = get_x509_cert(err_cert);
1278 os_memset(&ev, 0, sizeof(ev));
1279 ev.cert_fail.reason = reason != TLS_FAIL_UNSPECIFIED ?
1280 reason : openssl_tls_fail_reason(err);
1281 ev.cert_fail.depth = depth;
1282 ev.cert_fail.subject = subject;
1283 ev.cert_fail.reason_txt = err_str;
1284 ev.cert_fail.cert = cert;
7c0e1e27 1285 context->event_cb(context->cb_ctx, TLS_CERT_CHAIN_FAILURE, &ev);
00468b46
JM		 1286 wpabuf_free(cert);
1287}
1288
1289
1290static void openssl_tls_cert_event(struct tls_connection *conn,
1291 X509 *err_cert, int depth,
1292 const char *subject)
1293{
1294 struct wpabuf *cert = NULL;
1295 union tls_event_data ev;
7c0e1e27 1296 struct tls_context *context = conn->context;
00468b46
JM		 1297#ifdef CONFIG_SHA256
1298 u8 hash[32];
1299#endif /* CONFIG_SHA256 */
1300
7c0e1e27 1301 if (context->event_cb == NULL)
00468b46
JM		 1302 return;
1303
1304 os_memset(&ev, 0, sizeof(ev));
7c0e1e27 1305 if (conn->cert_probe || context->cert_in_cb) {
00468b46
JM		 1306 cert = get_x509_cert(err_cert);
1307 ev.peer_cert.cert = cert;
1308 }
1309#ifdef CONFIG_SHA256
1310 if (cert) {
1311 const u8 *addr[1];
1312 size_t len[1];
1313 addr[0] = wpabuf_head(cert);
1314 len[0] = wpabuf_len(cert);
1315 if (sha256_vector(1, addr, len, hash) == 0) {
1316 ev.peer_cert.hash = hash;
1317 ev.peer_cert.hash_len = sizeof(hash);
1318 }
1319 }
1320#endif /* CONFIG_SHA256 */
1321 ev.peer_cert.depth = depth;
1322 ev.peer_cert.subject = subject;
7c0e1e27 1323 context->event_cb(context->cb_ctx, TLS_PEER_CERTIFICATE, &ev);
00468b46
JM		 1324 wpabuf_free(cert);
1325}
1326
1327
6fc6879b
JM		 1328static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
1329{
1330 char buf[256];
1331 X509 *err_cert;
1332 int err, depth;
1333 SSL *ssl;
1334 struct tls_connection *conn;
7c0e1e27 1335 struct tls_context *context;
01f809c7 1336 char *match, *altmatch, *suffix_match;
00468b46 1337 const char *err_str;
6fc6879b
JM		 1338
1339 err_cert = X509_STORE_CTX_get_current_cert(x509_ctx);
1340 err = X509_STORE_CTX_get_error(x509_ctx);
1341 depth = X509_STORE_CTX_get_error_depth(x509_ctx);
1342 ssl = X509_STORE_CTX_get_ex_data(x509_ctx,
1343 SSL_get_ex_data_X509_STORE_CTX_idx());
1344 X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf));
1345
1346 conn = SSL_get_app_data(ssl);
0bdaa741
JM		 1347 if (conn == NULL)
1348 return 0;
080585c0
JM		 1349
1350 if (depth == 0)
1351 conn->peer_cert = err_cert;
1352 else if (depth == 1)
1353 conn->peer_issuer = err_cert;
1354
7c0e1e27 1355 context = conn->context;
0bdaa741
JM		 1356 match = conn->subject_match;
1357 altmatch = conn->altsubject_match;
01f809c7 1358 suffix_match = conn->suffix_match;
6fc6879b 1359
00468b46
JM		 1360 if (!preverify_ok && !conn->ca_cert_verify)
1361 preverify_ok = 1;
1362 if (!preverify_ok && depth > 0 && conn->server_cert_only)
1363 preverify_ok = 1;
235279e7
JM		 1364 if (!preverify_ok && (conn->flags & TLS_CONN_DISABLE_TIME_CHECKS) &&
1365 (err == X509_V_ERR_CERT_HAS_EXPIRED ||
1366 err == X509_V_ERR_CERT_NOT_YET_VALID)) {
1367 wpa_printf(MSG_DEBUG, "OpenSSL: Ignore certificate validity "
1368 "time mismatch");
1369 preverify_ok = 1;
1370 }
00468b46
JM		 1371
1372 err_str = X509_verify_cert_error_string(err);
1373
1374#ifdef CONFIG_SHA256
1375 if (preverify_ok && depth == 0 && conn->server_cert_only) {
1376 struct wpabuf *cert;
1377 cert = get_x509_cert(err_cert);
1378 if (!cert) {
1379 wpa_printf(MSG_DEBUG, "OpenSSL: Could not fetch "
1380 "server certificate data");
6fc6879b 1381 preverify_ok = 0;
00468b46
JM		 1382 } else {
1383 u8 hash[32];
1384 const u8 *addr[1];
1385 size_t len[1];
1386 addr[0] = wpabuf_head(cert);
1387 len[0] = wpabuf_len(cert);
1388 if (sha256_vector(1, addr, len, hash) < 0 ||
1389 os_memcmp(conn->srv_cert_hash, hash, 32) != 0) {
1390 err_str = "Server certificate mismatch";
1391 err = X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN;
1392 preverify_ok = 0;
1393 }
1394 wpabuf_free(cert);
6fc6879b
JM		 1395 }
1396 }
00468b46
JM		 1397#endif /* CONFIG_SHA256 */
1398
1399 if (!preverify_ok) {
1400 wpa_printf(MSG_WARNING, "TLS: Certificate verification failed,"
1401 " error %d (%s) depth %d for '%s'", err, err_str,
1402 depth, buf);
1403 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1404 err_str, TLS_FAIL_UNSPECIFIED);
1405 return preverify_ok;
1406 }
1407
1408 wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - preverify_ok=%d "
1409 "err=%d (%s) ca_cert_verify=%d depth=%d buf='%s'",
1410 preverify_ok, err, err_str,
1411 conn->ca_cert_verify, depth, buf);
1412 if (depth == 0 && match && os_strstr(buf, match) == NULL) {
1413 wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not "
1414 "match with '%s'", buf, match);
1415 preverify_ok = 0;
1416 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1417 "Subject mismatch",
1418 TLS_FAIL_SUBJECT_MISMATCH);
1419 } else if (depth == 0 && altmatch &&
1420 !tls_match_altsubject(err_cert, altmatch)) {
1421 wpa_printf(MSG_WARNING, "TLS: altSubjectName match "
1422 "'%s' not found", altmatch);
1423 preverify_ok = 0;
1424 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1425 "AltSubject mismatch",
1426 TLS_FAIL_ALTSUBJECT_MISMATCH);
01f809c7
JM		 1427 } else if (depth == 0 && suffix_match &&
1428 !tls_match_suffix(err_cert, suffix_match)) {
1429 wpa_printf(MSG_WARNING, "TLS: Domain suffix match '%s' not found",
1430 suffix_match);
1431 preverify_ok = 0;
1432 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1433 "Domain suffix mismatch",
1434 TLS_FAIL_DOMAIN_SUFFIX_MISMATCH);
00468b46
JM		 1435 } else
1436 openssl_tls_cert_event(conn, err_cert, depth, buf);
1437
1438 if (conn->cert_probe && preverify_ok && depth == 0) {
1439 wpa_printf(MSG_DEBUG, "OpenSSL: Reject server certificate "
1440 "on probe-only run");
1441 preverify_ok = 0;
1442 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1443 "Server certificate chain probe",
1444 TLS_FAIL_SERVER_CHAIN_PROBE);
1445 }
6fc6879b 1446
7c0e1e27
PS		 1447 if (preverify_ok && context->event_cb != NULL)
1448 context->event_cb(context->cb_ctx,
1449 TLS_CERT_CHAIN_SUCCESS, NULL);
dd7fec1f 1450
6fc6879b
JM		 1451 return preverify_ok;
1452}
1453
1454
1455#ifndef OPENSSL_NO_STDIO
1456static int tls_load_ca_der(void *_ssl_ctx, const char *ca_cert)
1457{
1458 SSL_CTX *ssl_ctx = _ssl_ctx;
1459 X509_LOOKUP *lookup;
1460 int ret = 0;
1461
1462 lookup = X509_STORE_add_lookup(ssl_ctx->cert_store,
1463 X509_LOOKUP_file());
1464 if (lookup == NULL) {
1465 tls_show_errors(MSG_WARNING, __func__,
1466 "Failed add lookup for X509 store");
1467 return -1;
1468 }
1469
1470 if (!X509_LOOKUP_load_file(lookup, ca_cert, X509_FILETYPE_ASN1)) {
1471 unsigned long err = ERR_peek_error();
1472 tls_show_errors(MSG_WARNING, __func__,
1473 "Failed load CA in DER format");
1474 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1475 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1476 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1477 "cert already in hash table error",
1478 __func__);
1479 } else
1480 ret = -1;
1481 }
1482
1483 return ret;
1484}
1485#endif /* OPENSSL_NO_STDIO */
1486
1487
2a0cd067
DS		 1488#ifdef ANDROID
1489static BIO * BIO_from_keystore(const char *key)
1490{
1491 BIO *bio = NULL;
1492 char value[KEYSTORE_MESSAGE_SIZE];
1493 int length = keystore_get(key, strlen(key), value);
1494 if (length != -1 && (bio = BIO_new(BIO_s_mem())) != NULL)
1495 BIO_write(bio, value, length);
1496 return bio;
1497}
1498#endif /* ANDROID */
1499
1500
6fc6879b
JM		 1501static int tls_connection_ca_cert(void *_ssl_ctx, struct tls_connection *conn,
1502 const char *ca_cert, const u8 *ca_cert_blob,
1503 size_t ca_cert_blob_len, const char *ca_path)
1504{
1505 SSL_CTX *ssl_ctx = _ssl_ctx;
1506
1507 /*
1508 * Remove previously configured trusted CA certificates before adding
1509 * new ones.
1510 */
1511 X509_STORE_free(ssl_ctx->cert_store);
1512 ssl_ctx->cert_store = X509_STORE_new();
1513 if (ssl_ctx->cert_store == NULL) {
1514 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
1515 "certificate store", __func__);
1516 return -1;
1517 }
1518
00468b46
JM		 1519 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1520 conn->ca_cert_verify = 1;
1521
1522 if (ca_cert && os_strncmp(ca_cert, "probe://", 8) == 0) {
1523 wpa_printf(MSG_DEBUG, "OpenSSL: Probe for server certificate "
1524 "chain");
1525 conn->cert_probe = 1;
1526 conn->ca_cert_verify = 0;
1527 return 0;
1528 }
1529
1530 if (ca_cert && os_strncmp(ca_cert, "hash://", 7) == 0) {
1531#ifdef CONFIG_SHA256
1532 const char *pos = ca_cert + 7;
1533 if (os_strncmp(pos, "server/sha256/", 14) != 0) {
1534 wpa_printf(MSG_DEBUG, "OpenSSL: Unsupported ca_cert "
1535 "hash value '%s'", ca_cert);
1536 return -1;
1537 }
1538 pos += 14;
1539 if (os_strlen(pos) != 32 * 2) {
1540 wpa_printf(MSG_DEBUG, "OpenSSL: Unexpected SHA256 "
1541 "hash length in ca_cert '%s'", ca_cert);
1542 return -1;
1543 }
1544 if (hexstr2bin(pos, conn->srv_cert_hash, 32) < 0) {
1545 wpa_printf(MSG_DEBUG, "OpenSSL: Invalid SHA256 hash "
1546 "value in ca_cert '%s'", ca_cert);
1547 return -1;
1548 }
1549 conn->server_cert_only = 1;
1550 wpa_printf(MSG_DEBUG, "OpenSSL: Checking only server "
1551 "certificate match");
1552 return 0;
1553#else /* CONFIG_SHA256 */
1554 wpa_printf(MSG_INFO, "No SHA256 included in the build - "
1555 "cannot validate server certificate hash");
1556 return -1;
1557#endif /* CONFIG_SHA256 */
1558 }
1559
6fc6879b
JM		 1560 if (ca_cert_blob) {
1561 X509 *cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ca_cert_blob,
1562 ca_cert_blob_len);
1563 if (cert == NULL) {
1564 tls_show_errors(MSG_WARNING, __func__,
1565 "Failed to parse ca_cert_blob");
1566 return -1;
1567 }
1568
1569 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
1570 unsigned long err = ERR_peek_error();
1571 tls_show_errors(MSG_WARNING, __func__,
1572 "Failed to add ca_cert_blob to "
1573 "certificate store");
1574 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1575 ERR_GET_REASON(err) ==
1576 X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1577 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1578 "cert already in hash table error",
1579 __func__);
1580 } else {
1581 X509_free(cert);
1582 return -1;
1583 }
1584 }
1585 X509_free(cert);
1586 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob "
1587 "to certificate store", __func__);
6fc6879b
JM		 1588 return 0;
1589 }
1590
2a0cd067
DS		 1591#ifdef ANDROID
1592 if (ca_cert && os_strncmp("keystore://", ca_cert, 11) == 0) {
1593 BIO *bio = BIO_from_keystore(&ca_cert[11]);
1594 STACK_OF(X509_INFO) *stack = NULL;
1595 int i;
1596
1597 if (bio) {
1598 stack = PEM_X509_INFO_read_bio(bio, NULL, NULL, NULL);
1599 BIO_free(bio);
1600 }
1601 if (!stack)
1602 return -1;
1603
1604 for (i = 0; i < sk_X509_INFO_num(stack); ++i) {
1605 X509_INFO *info = sk_X509_INFO_value(stack, i);
1606 if (info->x509) {
1607 X509_STORE_add_cert(ssl_ctx->cert_store,
1608 info->x509);
1609 }
1610 if (info->crl) {
1611 X509_STORE_add_crl(ssl_ctx->cert_store,
1612 info->crl);
1613 }
1614 }
1615 sk_X509_INFO_pop_free(stack, X509_INFO_free);
1616 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1617 return 0;
1618 }
1619#endif /* ANDROID */
1620
6fc6879b
JM		 1621#ifdef CONFIG_NATIVE_WINDOWS
1622 if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) ==
1623 0) {
1624 wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from "
1625 "system certificate store");
6fc6879b
JM		 1626 return 0;
1627 }
1628#endif /* CONFIG_NATIVE_WINDOWS */
1629
1630 if (ca_cert || ca_path) {
1631#ifndef OPENSSL_NO_STDIO
1632 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) !=
1633 1) {
1634 tls_show_errors(MSG_WARNING, __func__,
1635 "Failed to load root certificates");
1636 if (ca_cert &&
1637 tls_load_ca_der(ssl_ctx, ca_cert) == 0) {
1638 wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded "
1639 "DER format CA certificate",
1640 __func__);
1641 } else
1642 return -1;
1643 } else {
1644 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1645 "certificate(s) loaded");
1646 tls_get_errors(ssl_ctx);
1647 }
6fc6879b
JM		 1648#else /* OPENSSL_NO_STDIO */
1649 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
1650 __func__);
1651 return -1;
1652#endif /* OPENSSL_NO_STDIO */
1653 } else {
1654 /* No ca_cert configured - do not try to verify server
1655 * certificate */
00468b46 1656 conn->ca_cert_verify = 0;
6fc6879b
JM		 1657 }
1658
1659 return 0;
1660}
1661
1662
1663static int tls_global_ca_cert(SSL_CTX *ssl_ctx, const char *ca_cert)
1664{
1665 if (ca_cert) {
1666 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1)
1667 {
1668 tls_show_errors(MSG_WARNING, __func__,
1669 "Failed to load root certificates");
1670 return -1;
1671 }
1672
1673 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1674 "certificate(s) loaded");
1675
1676#ifndef OPENSSL_NO_STDIO
1677 /* Add the same CAs to the client certificate requests */
1678 SSL_CTX_set_client_CA_list(ssl_ctx,
1679 SSL_load_client_CA_file(ca_cert));
1680#endif /* OPENSSL_NO_STDIO */
1681 }
1682
1683 return 0;
1684}
1685
1686
1687int tls_global_set_verify(void *ssl_ctx, int check_crl)
1688{
1689 int flags;
1690
1691 if (check_crl) {
1692 X509_STORE *cs = SSL_CTX_get_cert_store(ssl_ctx);
1693 if (cs == NULL) {
1694 tls_show_errors(MSG_INFO, __func__, "Failed to get "
1695 "certificate store when enabling "
1696 "check_crl");
1697 return -1;
1698 }
1699 flags = X509_V_FLAG_CRL_CHECK;
1700 if (check_crl == 2)
1701 flags |= X509_V_FLAG_CRL_CHECK_ALL;
1702 X509_STORE_set_flags(cs, flags);
1703 }
1704 return 0;
1705}
1706
1707
1708static int tls_connection_set_subject_match(struct tls_connection *conn,
1709 const char *subject_match,
01f809c7
JM		 1710 const char *altsubject_match,
1711 const char *suffix_match)
6fc6879b
JM		 1712{
1713 os_free(conn->subject_match);
1714 conn->subject_match = NULL;
1715 if (subject_match) {
1716 conn->subject_match = os_strdup(subject_match);
1717 if (conn->subject_match == NULL)
1718 return -1;
1719 }
1720
1721 os_free(conn->altsubject_match);
1722 conn->altsubject_match = NULL;
1723 if (altsubject_match) {
1724 conn->altsubject_match = os_strdup(altsubject_match);
1725 if (conn->altsubject_match == NULL)
1726 return -1;
1727 }
1728
01f809c7
JM		 1729 os_free(conn->suffix_match);
1730 conn->suffix_match = NULL;
1731 if (suffix_match) {
1732 conn->suffix_match = os_strdup(suffix_match);
1733 if (conn->suffix_match == NULL)
1734 return -1;
1735 }
1736
6fc6879b
JM		 1737 return 0;
1738}
1739
1740
1741int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn,
1742 int verify_peer)
1743{
bf206cad
JM		 1744 static int counter = 0;
1745
6fc6879b
JM		 1746 if (conn == NULL)
1747 return -1;
1748
1749 if (verify_peer) {
00468b46 1750 conn->ca_cert_verify = 1;
6fc6879b
JM		 1751 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER |
1752 SSL_VERIFY_FAIL_IF_NO_PEER_CERT |
1753 SSL_VERIFY_CLIENT_ONCE, tls_verify_cb);
1754 } else {
00468b46 1755 conn->ca_cert_verify = 0;
6fc6879b
JM		 1756 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
1757 }
1758
1759 SSL_set_accept_state(conn->ssl);
1760
bf206cad
JM		 1761 /*
1762 * Set session id context in order to avoid fatal errors when client
1763 * tries to resume a session. However, set the context to a unique
1764 * value in order to effectively disable session resumption for now
1765 * since not all areas of the server code are ready for it (e.g.,
1766 * EAP-TTLS needs special handling for Phase 2 after abbreviated TLS
1767 * handshake).
1768 */
1769 counter++;
1770 SSL_set_session_id_context(conn->ssl,
1771 (const unsigned char *) &counter,
1772 sizeof(counter));
1773
6fc6879b
JM		 1774 return 0;
1775}
1776
1777
1778static int tls_connection_client_cert(struct tls_connection *conn,
1779 const char *client_cert,
1780 const u8 *client_cert_blob,
1781 size_t client_cert_blob_len)
1782{
1783 if (client_cert == NULL && client_cert_blob == NULL)
1784 return 0;
1785
1786 if (client_cert_blob &&
1787 SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob,
1788 client_cert_blob_len) == 1) {
1789 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> "
1790 "OK");
1791 return 0;
1792 } else if (client_cert_blob) {
1793 tls_show_errors(MSG_DEBUG, __func__,
1794 "SSL_use_certificate_ASN1 failed");
1795 }
1796
1797 if (client_cert == NULL)
1798 return -1;
1799
2a0cd067
DS		 1800#ifdef ANDROID
1801 if (os_strncmp("keystore://", client_cert, 11) == 0) {
1802 BIO *bio = BIO_from_keystore(&client_cert[11]);
1803 X509 *x509 = NULL;
1804 int ret = -1;
1805 if (bio) {
1806 x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL);
1807 BIO_free(bio);
1808 }
1809 if (x509) {
1810 if (SSL_use_certificate(conn->ssl, x509) == 1)
1811 ret = 0;
1812 X509_free(x509);
1813 }
1814 return ret;
1815 }
1816#endif /* ANDROID */
1817
6fc6879b
JM		 1818#ifndef OPENSSL_NO_STDIO
1819 if (SSL_use_certificate_file(conn->ssl, client_cert,
1820 SSL_FILETYPE_ASN1) == 1) {
1821 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)"
1822 " --> OK");
1823 return 0;
6fc6879b
JM		 1824 }
1825
1826 if (SSL_use_certificate_file(conn->ssl, client_cert,
1827 SSL_FILETYPE_PEM) == 1) {
effab86f 1828 ERR_clear_error();
6fc6879b
JM		 1829 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)"
1830 " --> OK");
1831 return 0;
6fc6879b 1832 }
effab86f
JM		 1833
1834 tls_show_errors(MSG_DEBUG, __func__,
1835 "SSL_use_certificate_file failed");
6fc6879b
JM		 1836#else /* OPENSSL_NO_STDIO */
1837 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1838#endif /* OPENSSL_NO_STDIO */
1839
1840 return -1;
1841}
1842
1843
1844static int tls_global_client_cert(SSL_CTX *ssl_ctx, const char *client_cert)
1845{
1846#ifndef OPENSSL_NO_STDIO
1847 if (client_cert == NULL)
1848 return 0;
1849
1850 if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1851 SSL_FILETYPE_ASN1) != 1 &&
65897747 1852 SSL_CTX_use_certificate_chain_file(ssl_ctx, client_cert) != 1 &&
6fc6879b
JM		 1853 SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1854 SSL_FILETYPE_PEM) != 1) {
1855 tls_show_errors(MSG_INFO, __func__,
1856 "Failed to load client certificate");
1857 return -1;
1858 }
1859 return 0;
1860#else /* OPENSSL_NO_STDIO */
1861 if (client_cert == NULL)
1862 return 0;
1863 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1864 return -1;
1865#endif /* OPENSSL_NO_STDIO */
1866}
1867
1868
1869static int tls_passwd_cb(char *buf, int size, int rwflag, void *password)
1870{
1871 if (password == NULL) {
1872 return 0;
1873 }
1874 os_strlcpy(buf, (char *) password, size);
1875 return os_strlen(buf);
1876}
1877
1878
1879#ifdef PKCS12_FUNCS
1880static int tls_parse_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, PKCS12 *p12,
1881 const char *passwd)
1882{
1883 EVP_PKEY *pkey;
1884 X509 *cert;
1885 STACK_OF(X509) *certs;
1886 int res = 0;
1887 char buf[256];
1888
1889 pkey = NULL;
1890 cert = NULL;
1891 certs = NULL;
1892 if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) {
1893 tls_show_errors(MSG_DEBUG, __func__,
1894 "Failed to parse PKCS12 file");
1895 PKCS12_free(p12);
1896 return -1;
1897 }
1898 wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data");
1899
1900 if (cert) {
1901 X509_NAME_oneline(X509_get_subject_name(cert), buf,
1902 sizeof(buf));
1903 wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: "
1904 "subject='%s'", buf);
1905 if (ssl) {
1906 if (SSL_use_certificate(ssl, cert) != 1)
1907 res = -1;
1908 } else {
1909 if (SSL_CTX_use_certificate(ssl_ctx, cert) != 1)
1910 res = -1;
1911 }
1912 X509_free(cert);
1913 }
1914
1915 if (pkey) {
1916 wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12");
1917 if (ssl) {
1918 if (SSL_use_PrivateKey(ssl, pkey) != 1)
1919 res = -1;
1920 } else {
1921 if (SSL_CTX_use_PrivateKey(ssl_ctx, pkey) != 1)
1922 res = -1;
1923 }
1924 EVP_PKEY_free(pkey);
1925 }
1926
1927 if (certs) {
1928 while ((cert = sk_X509_pop(certs)) != NULL) {
1929 X509_NAME_oneline(X509_get_subject_name(cert), buf,
1930 sizeof(buf));
1931 wpa_printf(MSG_DEBUG, "TLS: additional certificate"
1932 " from PKCS12: subject='%s'", buf);
1933 /*
1934 * There is no SSL equivalent for the chain cert - so
1935 * always add it to the context...
1936 */
1937 if (SSL_CTX_add_extra_chain_cert(ssl_ctx, cert) != 1) {
1938 res = -1;
1939 break;
1940 }
1941 }
1942 sk_X509_free(certs);
1943 }
1944
1945 PKCS12_free(p12);
1946
1947 if (res < 0)
1948 tls_get_errors(ssl_ctx);
1949
1950 return res;
1951}
1952#endif /* PKCS12_FUNCS */
1953
1954
1955static int tls_read_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, const char *private_key,
1956 const char *passwd)
1957{
1958#ifdef PKCS12_FUNCS
1959 FILE *f;
1960 PKCS12 *p12;
1961
1962 f = fopen(private_key, "rb");
1963 if (f == NULL)
1964 return -1;
1965
1966 p12 = d2i_PKCS12_fp(f, NULL);
1967 fclose(f);
1968
1969 if (p12 == NULL) {
1970 tls_show_errors(MSG_INFO, __func__,
1971 "Failed to use PKCS#12 file");
1972 return -1;
1973 }
1974
1975 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
1976
1977#else /* PKCS12_FUNCS */
1978 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read "
1979 "p12/pfx files");
1980 return -1;
1981#endif /* PKCS12_FUNCS */
1982}
1983
1984
1985static int tls_read_pkcs12_blob(SSL_CTX *ssl_ctx, SSL *ssl,
1986 const u8 *blob, size_t len, const char *passwd)
1987{
1988#ifdef PKCS12_FUNCS
1989 PKCS12 *p12;
1990
1991 p12 = d2i_PKCS12(NULL, (OPENSSL_d2i_TYPE) &blob, len);
1992 if (p12 == NULL) {
1993 tls_show_errors(MSG_INFO, __func__,
1994 "Failed to use PKCS#12 blob");
1995 return -1;
1996 }
1997
1998 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
1999
2000#else /* PKCS12_FUNCS */
2001 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse "
2002 "p12/pfx blobs");
2003 return -1;
2004#endif /* PKCS12_FUNCS */
2005}
2006
2007
e572cb63 2008#ifndef OPENSSL_NO_ENGINE
e59c91af
DS		 2009static int tls_engine_get_cert(struct tls_connection *conn,
2010 const char *cert_id,
2011 X509 **cert)
2012{
e59c91af
DS		 2013 /* this runs after the private key is loaded so no PIN is required */
2014 struct {
2015 const char *cert_id;
2016 X509 *cert;
2017 } params;
2018 params.cert_id = cert_id;
2019 params.cert = NULL;
2020
2021 if (!ENGINE_ctrl_cmd(conn->engine, "LOAD_CERT_CTRL",
2022 0, &params, NULL, 1)) {
2023 wpa_printf(MSG_ERROR, "ENGINE: cannot load client cert with id"
2024 " '%s' [%s]", cert_id,
2025 ERR_error_string(ERR_get_error(), NULL));
2026 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
2027 }
2028 if (!params.cert) {
2029 wpa_printf(MSG_ERROR, "ENGINE: did not properly cert with id"
2030 " '%s'", cert_id);
2031 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
2032 }
2033 *cert = params.cert;
2034 return 0;
e59c91af 2035}
e572cb63 2036#endif /* OPENSSL_NO_ENGINE */
e59c91af
DS		 2037
2038
2039static int tls_connection_engine_client_cert(struct tls_connection *conn,
2040 const char *cert_id)
2041{
2042#ifndef OPENSSL_NO_ENGINE
2043 X509 *cert;
2044
2045 if (tls_engine_get_cert(conn, cert_id, &cert))
2046 return -1;
2047
2048 if (!SSL_use_certificate(conn->ssl, cert)) {
2049 tls_show_errors(MSG_ERROR, __func__,
2050 "SSL_use_certificate failed");
2051 X509_free(cert);
2052 return -1;
2053 }
2054 X509_free(cert);
2055 wpa_printf(MSG_DEBUG, "ENGINE: SSL_use_certificate --> "
2056 "OK");
2057 return 0;
2058
2059#else /* OPENSSL_NO_ENGINE */
2060 return -1;
2061#endif /* OPENSSL_NO_ENGINE */
2062}
2063
2064
2065static int tls_connection_engine_ca_cert(void *_ssl_ctx,
2066 struct tls_connection *conn,
2067 const char *ca_cert_id)
2068{
2069#ifndef OPENSSL_NO_ENGINE
2070 X509 *cert;
2071 SSL_CTX *ssl_ctx = _ssl_ctx;
2072
2073 if (tls_engine_get_cert(conn, ca_cert_id, &cert))
2074 return -1;
2075
2076 /* start off the same as tls_connection_ca_cert */
2077 X509_STORE_free(ssl_ctx->cert_store);
2078 ssl_ctx->cert_store = X509_STORE_new();
2079 if (ssl_ctx->cert_store == NULL) {
2080 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
2081 "certificate store", __func__);
2082 X509_free(cert);
2083 return -1;
2084 }
2085 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
2086 unsigned long err = ERR_peek_error();
2087 tls_show_errors(MSG_WARNING, __func__,
2088 "Failed to add CA certificate from engine "
2089 "to certificate store");
2090 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
2091 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
2092 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring cert"
2093 " already in hash table error",
2094 __func__);
2095 } else {
2096 X509_free(cert);
2097 return -1;
2098 }
2099 }
2100 X509_free(cert);
2101 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added CA certificate from engine "
2102 "to certificate store", __func__);
2103 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
d8858cad
CW		 2104 conn->ca_cert_verify = 1;
2105
e59c91af
DS		 2106 return 0;
2107
2108#else /* OPENSSL_NO_ENGINE */
2109 return -1;
2110#endif /* OPENSSL_NO_ENGINE */
2111}
2112
2113
6fc6879b
JM		 2114static int tls_connection_engine_private_key(struct tls_connection *conn)
2115{
2116#ifndef OPENSSL_NO_ENGINE
2117 if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) {
2118 tls_show_errors(MSG_ERROR, __func__,
2119 "ENGINE: cannot use private key for TLS");
2120 return -1;
2121 }
2122 if (!SSL_check_private_key(conn->ssl)) {
2123 tls_show_errors(MSG_INFO, __func__,
2124 "Private key failed verification");
2125 return -1;
2126 }
2127 return 0;
2128#else /* OPENSSL_NO_ENGINE */
2129 wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but "
2130 "engine support was not compiled in");
2131 return -1;
2132#endif /* OPENSSL_NO_ENGINE */
2133}
2134
2135
2136static int tls_connection_private_key(void *_ssl_ctx,
2137 struct tls_connection *conn,
2138 const char *private_key,
2139 const char *private_key_passwd,
2140 const u8 *private_key_blob,
2141 size_t private_key_blob_len)
2142{
2143 SSL_CTX *ssl_ctx = _ssl_ctx;
2144 char *passwd;
2145 int ok;
2146
2147 if (private_key == NULL && private_key_blob == NULL)
2148 return 0;
2149
2150 if (private_key_passwd) {
2151 passwd = os_strdup(private_key_passwd);
2152 if (passwd == NULL)
2153 return -1;
2154 } else
2155 passwd = NULL;
2156
2157 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
2158 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
2159
2160 ok = 0;
2161 while (private_key_blob) {
2162 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl,
2163 (u8 *) private_key_blob,
2164 private_key_blob_len) == 1) {
2165 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
2166 "ASN1(EVP_PKEY_RSA) --> OK");
2167 ok = 1;
2168 break;
6fc6879b
JM		 2169 }
2170
2171 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl,
2172 (u8 *) private_key_blob,
2173 private_key_blob_len) == 1) {
2174 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
2175 "ASN1(EVP_PKEY_DSA) --> OK");
2176 ok = 1;
2177 break;
6fc6879b
JM		 2178 }
2179
2180 if (SSL_use_RSAPrivateKey_ASN1(conn->ssl,
2181 (u8 *) private_key_blob,
2182 private_key_blob_len) == 1) {
2183 wpa_printf(MSG_DEBUG, "OpenSSL: "
2184 "SSL_use_RSAPrivateKey_ASN1 --> OK");
2185 ok = 1;
2186 break;
6fc6879b
JM		 2187 }
2188
2189 if (tls_read_pkcs12_blob(ssl_ctx, conn->ssl, private_key_blob,
2190 private_key_blob_len, passwd) == 0) {
2191 wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> "
2192 "OK");
2193 ok = 1;
2194 break;
2195 }
2196
2197 break;
2198 }
2199
2a0cd067
DS		 2200#ifdef ANDROID
2201 if (!ok && private_key &&
2202 os_strncmp("keystore://", private_key, 11) == 0) {
2203 BIO *bio = BIO_from_keystore(&private_key[11]);
2204 EVP_PKEY *pkey = NULL;
2205 if (bio) {
2206 pkey = PEM_read_bio_PrivateKey(bio, NULL, NULL, NULL);
2207 BIO_free(bio);
2208 }
2209 if (pkey) {
2210 if (SSL_use_PrivateKey(conn->ssl, pkey) == 1) {
2211 wpa_printf(MSG_DEBUG, "OpenSSL: Private key "
2212 "from keystore");
2213 ok = 1;
2214 }
2215 EVP_PKEY_free(pkey);
2216 }
2217 }
2218#endif /* ANDROID */
2219
6fc6879b
JM		 2220 while (!ok && private_key) {
2221#ifndef OPENSSL_NO_STDIO
2222 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
2223 SSL_FILETYPE_ASN1) == 1) {
2224 wpa_printf(MSG_DEBUG, "OpenSSL: "
2225 "SSL_use_PrivateKey_File (DER) --> OK");
2226 ok = 1;
2227 break;
6fc6879b
JM		 2228 }
2229
2230 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
2231 SSL_FILETYPE_PEM) == 1) {
2232 wpa_printf(MSG_DEBUG, "OpenSSL: "
2233 "SSL_use_PrivateKey_File (PEM) --> OK");
2234 ok = 1;
2235 break;
6fc6879b
JM		 2236 }
2237#else /* OPENSSL_NO_STDIO */
2238 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
2239 __func__);
2240#endif /* OPENSSL_NO_STDIO */
2241
2242 if (tls_read_pkcs12(ssl_ctx, conn->ssl, private_key, passwd)
2243 == 0) {
2244 wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file "
2245 "--> OK");
2246 ok = 1;
2247 break;
2248 }
2249
2250 if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) {
2251 wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to "
2252 "access certificate store --> OK");
2253 ok = 1;
2254 break;
2255 }
2256
2257 break;
2258 }
2259
2260 if (!ok) {
effab86f
JM		 2261 tls_show_errors(MSG_INFO, __func__,
2262 "Failed to load private key");
6fc6879b 2263 os_free(passwd);
6fc6879b
JM		 2264 return -1;
2265 }
2266 ERR_clear_error();
2267 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
2268 os_free(passwd);
55651a4b 2269
6fc6879b
JM		 2270 if (!SSL_check_private_key(conn->ssl)) {
2271 tls_show_errors(MSG_INFO, __func__, "Private key failed "
2272 "verification");
2273 return -1;
2274 }
2275
2276 wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully");
2277 return 0;
2278}
2279
2280
2281static int tls_global_private_key(SSL_CTX *ssl_ctx, const char *private_key,
2282 const char *private_key_passwd)
2283{
2284 char *passwd;
2285
2286 if (private_key == NULL)
2287 return 0;
2288
2289 if (private_key_passwd) {
2290 passwd = os_strdup(private_key_passwd);
2291 if (passwd == NULL)
2292 return -1;
2293 } else
2294 passwd = NULL;
2295
2296 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
2297 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
2298 if (
2299#ifndef OPENSSL_NO_STDIO
2300 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
2301 SSL_FILETYPE_ASN1) != 1 &&
2302 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
2303 SSL_FILETYPE_PEM) != 1 &&
2304#endif /* OPENSSL_NO_STDIO */
2305 tls_read_pkcs12(ssl_ctx, NULL, private_key, passwd)) {
2306 tls_show_errors(MSG_INFO, __func__,
2307 "Failed to load private key");
2308 os_free(passwd);
2309 ERR_clear_error();
2310 return -1;
2311 }
2312 os_free(passwd);
2313 ERR_clear_error();
2314 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
55651a4b 2315
6fc6879b
JM		 2316 if (!SSL_CTX_check_private_key(ssl_ctx)) {
2317 tls_show_errors(MSG_INFO, __func__,
2318 "Private key failed verification");
2319 return -1;
2320 }
2321
2322 return 0;
2323}
2324
2325
2326static int tls_connection_dh(struct tls_connection *conn, const char *dh_file)
2327{
2328#ifdef OPENSSL_NO_DH
2329 if (dh_file == NULL)
2330 return 0;
2331 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
2332 "dh_file specified");
2333 return -1;
2334#else /* OPENSSL_NO_DH */
2335 DH *dh;
2336 BIO *bio;
2337
2338 /* TODO: add support for dh_blob */
2339 if (dh_file == NULL)
2340 return 0;
2341 if (conn == NULL)
2342 return -1;
2343
2344 bio = BIO_new_file(dh_file, "r");
2345 if (bio == NULL) {
2346 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
2347 dh_file, ERR_error_string(ERR_get_error(), NULL));
2348 return -1;
2349 }
2350 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
2351 BIO_free(bio);
2352#ifndef OPENSSL_NO_DSA
2353 while (dh == NULL) {
2354 DSA *dsa;
2355 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
2356 " trying to parse as DSA params", dh_file,
2357 ERR_error_string(ERR_get_error(), NULL));
2358 bio = BIO_new_file(dh_file, "r");
2359 if (bio == NULL)
2360 break;
2361 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
2362 BIO_free(bio);
2363 if (!dsa) {
2364 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
2365 "'%s': %s", dh_file,
2366 ERR_error_string(ERR_get_error(), NULL));
2367 break;
2368 }
2369
2370 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
2371 dh = DSA_dup_DH(dsa);
2372 DSA_free(dsa);
2373 if (dh == NULL) {
2374 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
2375 "params into DH params");
2376 break;
2377 }
2378 break;
2379 }
2380#endif /* !OPENSSL_NO_DSA */
2381 if (dh == NULL) {
2382 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
2383 "'%s'", dh_file);
2384 return -1;
2385 }
2386
2387 if (SSL_set_tmp_dh(conn->ssl, dh) != 1) {
2388 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
2389 "%s", dh_file,
2390 ERR_error_string(ERR_get_error(), NULL));
2391 DH_free(dh);
2392 return -1;
2393 }
2394 DH_free(dh);
2395 return 0;
2396#endif /* OPENSSL_NO_DH */
2397}
2398
2399
2400static int tls_global_dh(SSL_CTX *ssl_ctx, const char *dh_file)
2401{
2402#ifdef OPENSSL_NO_DH
2403 if (dh_file == NULL)
2404 return 0;
2405 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
2406 "dh_file specified");
2407 return -1;
2408#else /* OPENSSL_NO_DH */
2409 DH *dh;
2410 BIO *bio;
2411
2412 /* TODO: add support for dh_blob */
2413 if (dh_file == NULL)
2414 return 0;
2415 if (ssl_ctx == NULL)
2416 return -1;
2417
2418 bio = BIO_new_file(dh_file, "r");
2419 if (bio == NULL) {
2420 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
2421 dh_file, ERR_error_string(ERR_get_error(), NULL));
2422 return -1;
2423 }
2424 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
2425 BIO_free(bio);
2426#ifndef OPENSSL_NO_DSA
2427 while (dh == NULL) {
2428 DSA *dsa;
2429 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
2430 " trying to parse as DSA params", dh_file,
2431 ERR_error_string(ERR_get_error(), NULL));
2432 bio = BIO_new_file(dh_file, "r");
2433 if (bio == NULL)
2434 break;
2435 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
2436 BIO_free(bio);
2437 if (!dsa) {
2438 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
2439 "'%s': %s", dh_file,
2440 ERR_error_string(ERR_get_error(), NULL));
2441 break;
2442 }
2443
2444 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
2445 dh = DSA_dup_DH(dsa);
2446 DSA_free(dsa);
2447 if (dh == NULL) {
2448 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
2449 "params into DH params");
2450 break;
2451 }
2452 break;
2453 }
2454#endif /* !OPENSSL_NO_DSA */
2455 if (dh == NULL) {
2456 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
2457 "'%s'", dh_file);
2458 return -1;
2459 }
2460
2461 if (SSL_CTX_set_tmp_dh(ssl_ctx, dh) != 1) {
2462 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
2463 "%s", dh_file,
2464 ERR_error_string(ERR_get_error(), NULL));
2465 DH_free(dh);
2466 return -1;
2467 }
2468 DH_free(dh);
2469 return 0;
2470#endif /* OPENSSL_NO_DH */
2471}
2472
2473
2474int tls_connection_get_keys(void *ssl_ctx, struct tls_connection *conn,
2475 struct tls_keys *keys)
2476{
c9e08af2
JM		 2477#ifdef CONFIG_FIPS
2478 wpa_printf(MSG_ERROR, "OpenSSL: TLS keys cannot be exported in FIPS "
2479 "mode");
2480 return -1;
2481#else /* CONFIG_FIPS */
6fc6879b
JM		 2482 SSL *ssl;
2483
2484 if (conn == NULL || keys == NULL)
2485 return -1;
2486 ssl = conn->ssl;
2487 if (ssl == NULL || ssl->s3 == NULL || ssl->session == NULL)
2488 return -1;
2489
2490 os_memset(keys, 0, sizeof(*keys));
2491 keys->master_key = ssl->session->master_key;
2492 keys->master_key_len = ssl->session->master_key_length;
2493 keys->client_random = ssl->s3->client_random;
2494 keys->client_random_len = SSL3_RANDOM_SIZE;
2495 keys->server_random = ssl->s3->server_random;
2496 keys->server_random_len = SSL3_RANDOM_SIZE;
2497
2498 return 0;
c9e08af2 2499#endif /* CONFIG_FIPS */
6fc6879b
JM		 2500}
2501
2502
2503int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
2504 const char *label, int server_random_first,
2505 u8 *out, size_t out_len)
2506{
68770ccd
JM		 2507#if OPENSSL_VERSION_NUMBER >= 0x10001000L
2508 SSL *ssl;
2509 if (conn == NULL)
2510 return -1;
2511 if (server_random_first)
2512 return -1;
2513 ssl = conn->ssl;
2514 if (SSL_export_keying_material(ssl, out, out_len, label,
2515 os_strlen(label), NULL, 0, 0) == 1) {
2516 wpa_printf(MSG_DEBUG, "OpenSSL: Using internal PRF");
2517 return 0;
2518 }
2519#endif
6fc6879b
JM		 2520 return -1;
2521}
2522
2523
81c85c06
JM		 2524static struct wpabuf *
2525openssl_handshake(struct tls_connection *conn, const struct wpabuf *in_data,
2526 int server)
6fc6879b
JM		 2527{
2528 int res;
81c85c06 2529 struct wpabuf *out_data;
6fc6879b
JM		 2530
2531 /*
2532 * Give TLS handshake data from the server (if available) to OpenSSL
2533 * for processing.
2534 */
2535 if (in_data &&
81c85c06
JM		 2536 BIO_write(conn->ssl_in, wpabuf_head(in_data), wpabuf_len(in_data))
2537 < 0) {
6fc6879b
JM		 2538 tls_show_errors(MSG_INFO, __func__,
2539 "Handshake failed - BIO_write");
2540 return NULL;
2541 }
2542
2543 /* Initiate TLS handshake or continue the existing handshake */
81c85c06
JM		 2544 if (server)
2545 res = SSL_accept(conn->ssl);
2546 else
2547 res = SSL_connect(conn->ssl);
6fc6879b
JM		 2548 if (res != 1) {
2549 int err = SSL_get_error(conn->ssl, res);
2550 if (err == SSL_ERROR_WANT_READ)
2551 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want "
2552 "more data");
2553 else if (err == SSL_ERROR_WANT_WRITE)
2554 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to "
2555 "write");
2556 else {
2557 tls_show_errors(MSG_INFO, __func__, "SSL_connect");
2558 conn->failed++;
2559 }
2560 }
2561
2562 /* Get the TLS handshake data to be sent to the server */
2563 res = BIO_ctrl_pending(conn->ssl_out);
2564 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
81c85c06 2565 out_data = wpabuf_alloc(res);
6fc6879b
JM		 2566 if (out_data == NULL) {
2567 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
2568 "handshake output (%d bytes)", res);
2569 if (BIO_reset(conn->ssl_out) < 0) {
2570 tls_show_errors(MSG_INFO, __func__,
2571 "BIO_reset failed");
2572 }
6fc6879b
JM		 2573 return NULL;
2574 }
81c85c06
JM		 2575 res = res == 0 ? 0 : BIO_read(conn->ssl_out, wpabuf_mhead(out_data),
2576 res);
6fc6879b
JM		 2577 if (res < 0) {
2578 tls_show_errors(MSG_INFO, __func__,
2579 "Handshake failed - BIO_read");
2580 if (BIO_reset(conn->ssl_out) < 0) {
2581 tls_show_errors(MSG_INFO, __func__,
2582 "BIO_reset failed");
2583 }
81c85c06 2584 wpabuf_free(out_data);
6fc6879b
JM		 2585 return NULL;
2586 }
81c85c06 2587 wpabuf_put(out_data, res);
6fc6879b
JM		 2588
2589 return out_data;
2590}
2591
2592
81c85c06
JM		 2593static struct wpabuf *
2594openssl_get_appl_data(struct tls_connection *conn, size_t max_len)
6fc6879b 2595{
81c85c06 2596 struct wpabuf *appl_data;
6fc6879b 2597 int res;
6fc6879b 2598
81c85c06
JM		 2599 appl_data = wpabuf_alloc(max_len + 100);
2600 if (appl_data == NULL)
6fc6879b 2601 return NULL;
6fc6879b 2602
81c85c06
JM		 2603 res = SSL_read(conn->ssl, wpabuf_mhead(appl_data),
2604 wpabuf_size(appl_data));
2605 if (res < 0) {
bf206cad 2606 int err = SSL_get_error(conn->ssl, res);
81c85c06
JM		 2607 if (err == SSL_ERROR_WANT_READ ||
2608 err == SSL_ERROR_WANT_WRITE) {
2609 wpa_printf(MSG_DEBUG, "SSL: No Application Data "
2610 "included");
2611 } else {
6fc6879b 2612 tls_show_errors(MSG_INFO, __func__,
81c85c06
JM		 2613 "Failed to read possible "
2614 "Application Data");
6fc6879b 2615 }
81c85c06 2616 wpabuf_free(appl_data);
6fc6879b
JM		 2617 return NULL;
2618 }
81c85c06
JM		 2619
2620 wpabuf_put(appl_data, res);
2621 wpa_hexdump_buf_key(MSG_MSGDUMP, "SSL: Application Data in Finished "
2622 "message", appl_data);
2623
2624 return appl_data;
2625}
2626
2627
2628static struct wpabuf *
2629openssl_connection_handshake(struct tls_connection *conn,
2630 const struct wpabuf *in_data,
2631 struct wpabuf **appl_data, int server)
2632{
2633 struct wpabuf *out_data;
2634
2635 if (appl_data)
2636 *appl_data = NULL;
2637
2638 out_data = openssl_handshake(conn, in_data, server);
2639 if (out_data == NULL)
6fc6879b 2640 return NULL;
81c85c06
JM		 2641
2642 if (SSL_is_init_finished(conn->ssl) && appl_data && in_data)
2643 *appl_data = openssl_get_appl_data(conn, wpabuf_len(in_data));
2644
6fc6879b
JM		 2645 return out_data;
2646}
2647
2648
81c85c06
JM		 2649struct wpabuf *
2650tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn,
2651 const struct wpabuf *in_data,
2652 struct wpabuf **appl_data)
2653{
2654 return openssl_connection_handshake(conn, in_data, appl_data, 0);
2655}
2656
2657
2658struct wpabuf * tls_connection_server_handshake(void *tls_ctx,
2659 struct tls_connection *conn,
2660 const struct wpabuf *in_data,
2661 struct wpabuf **appl_data)
2662{
2663 return openssl_connection_handshake(conn, in_data, appl_data, 1);
2664}
2665
2666
2667struct wpabuf * tls_connection_encrypt(void *tls_ctx,
2668 struct tls_connection *conn,
2669 const struct wpabuf *in_data)
6fc6879b
JM		 2670{
2671 int res;
81c85c06 2672 struct wpabuf *buf;
6fc6879b
JM		 2673
2674 if (conn == NULL)
81c85c06 2675 return NULL;
6fc6879b
JM		 2676
2677 /* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */
2678 if ((res = BIO_reset(conn->ssl_in)) < 0 ||
2679 (res = BIO_reset(conn->ssl_out)) < 0) {
2680 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
81c85c06 2681 return NULL;
6fc6879b 2682 }
81c85c06 2683 res = SSL_write(conn->ssl, wpabuf_head(in_data), wpabuf_len(in_data));
6fc6879b
JM		 2684 if (res < 0) {
2685 tls_show_errors(MSG_INFO, __func__,
2686 "Encryption failed - SSL_write");
81c85c06 2687 return NULL;
6fc6879b
JM		 2688 }
2689
2690 /* Read encrypted data to be sent to the server */
81c85c06
JM		 2691 buf = wpabuf_alloc(wpabuf_len(in_data) + 300);
2692 if (buf == NULL)
2693 return NULL;
2694 res = BIO_read(conn->ssl_out, wpabuf_mhead(buf), wpabuf_size(buf));
6fc6879b
JM		 2695 if (res < 0) {
2696 tls_show_errors(MSG_INFO, __func__,
2697 "Encryption failed - BIO_read");
81c85c06
JM		 2698 wpabuf_free(buf);
2699 return NULL;
6fc6879b 2700 }
81c85c06 2701 wpabuf_put(buf, res);
6fc6879b 2702
81c85c06 2703 return buf;
6fc6879b
JM		 2704}
2705
2706
81c85c06
JM		 2707struct wpabuf * tls_connection_decrypt(void *tls_ctx,
2708 struct tls_connection *conn,
2709 const struct wpabuf *in_data)
6fc6879b
JM		 2710{
2711 int res;
81c85c06 2712 struct wpabuf *buf;
6fc6879b
JM		 2713
2714 /* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */
81c85c06
JM		 2715 res = BIO_write(conn->ssl_in, wpabuf_head(in_data),
2716 wpabuf_len(in_data));
6fc6879b
JM		 2717 if (res < 0) {
2718 tls_show_errors(MSG_INFO, __func__,
2719 "Decryption failed - BIO_write");
81c85c06 2720 return NULL;
6fc6879b
JM		 2721 }
2722 if (BIO_reset(conn->ssl_out) < 0) {
2723 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
81c85c06 2724 return NULL;
6fc6879b
JM		 2725 }
2726
2727 /* Read decrypted data for further processing */
81c85c06
JM		 2728 /*
2729 * Even though we try to disable TLS compression, it is possible that
2730 * this cannot be done with all TLS libraries. Add extra buffer space
2731 * to handle the possibility of the decrypted data being longer than
2732 * input data.
2733 */
2734 buf = wpabuf_alloc((wpabuf_len(in_data) + 500) * 3);
2735 if (buf == NULL)
2736 return NULL;
2737 res = SSL_read(conn->ssl, wpabuf_mhead(buf), wpabuf_size(buf));
6fc6879b
JM		 2738 if (res < 0) {
2739 tls_show_errors(MSG_INFO, __func__,
2740 "Decryption failed - SSL_read");
a86a7316 2741 wpabuf_free(buf);
81c85c06 2742 return NULL;
6fc6879b 2743 }
81c85c06 2744 wpabuf_put(buf, res);
6fc6879b 2745
81c85c06 2746 return buf;
6fc6879b
JM		 2747}
2748
2749
2750int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn)
2751{
2752 return conn ? conn->ssl->hit : 0;
2753}
2754
2755
2756int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
2757 u8 *ciphers)
2758{
2759 char buf[100], *pos, *end;
2760 u8 *c;
2761 int ret;
2762
2763 if (conn == NULL || conn->ssl == NULL || ciphers == NULL)
2764 return -1;
2765
2766 buf[0] = '\0';
2767 pos = buf;
2768 end = pos + sizeof(buf);
2769
2770 c = ciphers;
2771 while (*c != TLS_CIPHER_NONE) {
2772 const char *suite;
2773
2774 switch (*c) {
2775 case TLS_CIPHER_RC4_SHA:
2776 suite = "RC4-SHA";
2777 break;
2778 case TLS_CIPHER_AES128_SHA:
2779 suite = "AES128-SHA";
2780 break;
2781 case TLS_CIPHER_RSA_DHE_AES128_SHA:
2782 suite = "DHE-RSA-AES128-SHA";
2783 break;
2784 case TLS_CIPHER_ANON_DH_AES128_SHA:
2785 suite = "ADH-AES128-SHA";
2786 break;
2787 default:
2788 wpa_printf(MSG_DEBUG, "TLS: Unsupported "
2789 "cipher selection: %d", *c);
2790 return -1;
2791 }
2792 ret = os_snprintf(pos, end - pos, ":%s", suite);
2793 if (ret < 0 || ret >= end - pos)
2794 break;
2795 pos += ret;
2796
2797 c++;
2798 }
2799
2800 wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1);
2801
2802 if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) {
2803 tls_show_errors(MSG_INFO, __func__,
2804 "Cipher suite configuration failed");
2805 return -1;
2806 }
2807
2808 return 0;
2809}
2810
2811
2812int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn,
2813 char *buf, size_t buflen)
2814{
2815 const char *name;
2816 if (conn == NULL || conn->ssl == NULL)
2817 return -1;
2818
2819 name = SSL_get_cipher(conn->ssl);
2820 if (name == NULL)
2821 return -1;
2822
2823 os_strlcpy(buf, name, buflen);
2824 return 0;
2825}
2826
2827
2828int tls_connection_enable_workaround(void *ssl_ctx,
2829 struct tls_connection *conn)
2830{
2831 SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
2832
2833 return 0;
2834}
2835
2836
1e5839e0 2837#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
6fc6879b
JM		 2838/* ClientHello TLS extensions require a patch to openssl, so this function is
2839 * commented out unless explicitly needed for EAP-FAST in order to be able to
2840 * build this file with unmodified openssl. */
2841int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn,
2842 int ext_type, const u8 *data,
2843 size_t data_len)
2844{
0cf03892 2845 if (conn == NULL || conn->ssl == NULL || ext_type != 35)
6fc6879b
JM		 2846 return -1;
2847
0cf03892
JM		 2848#ifdef CONFIG_OPENSSL_TICKET_OVERRIDE
2849 if (SSL_set_session_ticket_ext(conn->ssl, (void *) data,
2850 data_len) != 1)
2851 return -1;
2852#else /* CONFIG_OPENSSL_TICKET_OVERRIDE */
6fc6879b
JM		 2853 if (SSL_set_hello_extension(conn->ssl, ext_type, (void *) data,
2854 data_len) != 1)
2855 return -1;
0cf03892 2856#endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */
6fc6879b
JM		 2857
2858 return 0;
2859}
1e5839e0 2860#endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
6fc6879b
JM		 2861
2862
2863int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn)
2864{
2865 if (conn == NULL)
2866 return -1;
2867 return conn->failed;
2868}
2869
2870
2871int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn)
2872{
2873 if (conn == NULL)
2874 return -1;
2875 return conn->read_alerts;
2876}
2877
2878
2879int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn)
2880{
2881 if (conn == NULL)
2882 return -1;
2883 return conn->write_alerts;
2884}
2885
2886
080585c0
JM		 2887#ifdef HAVE_OCSP
2888
2889static void ocsp_debug_print_resp(OCSP_RESPONSE *rsp)
2890{
2891#ifndef CONFIG_NO_STDOUT_DEBUG
2892 extern int wpa_debug_level;
2893 BIO *out;
2894 size_t rlen;
2895 char *txt;
2896 int res;
2897
2898 if (wpa_debug_level > MSG_DEBUG)
2899 return;
2900
2901 out = BIO_new(BIO_s_mem());
2902 if (!out)
2903 return;
2904
2905 OCSP_RESPONSE_print(out, rsp, 0);
2906 rlen = BIO_ctrl_pending(out);
2907 txt = os_malloc(rlen + 1);
2908 if (!txt) {
2909 BIO_free(out);
2910 return;
2911 }
2912
2913 res = BIO_read(out, txt, rlen);
2914 if (res > 0) {
2915 txt[res] = '\0';
2916 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP Response\n%s", txt);
2917 }
2918 os_free(txt);
2919 BIO_free(out);
2920#endif /* CONFIG_NO_STDOUT_DEBUG */
2921}
2922
2923
2924static int ocsp_resp_cb(SSL *s, void *arg)
2925{
2926 struct tls_connection *conn = arg;
2927 const unsigned char *p;
2928 int len, status, reason;
2929 OCSP_RESPONSE *rsp;
2930 OCSP_BASICRESP *basic;
2931 OCSP_CERTID *id;
2932 ASN1_GENERALIZEDTIME *produced_at, *this_update, *next_update;
2933
2934 len = SSL_get_tlsext_status_ocsp_resp(s, &p);
2935 if (!p) {
2936 wpa_printf(MSG_DEBUG, "OpenSSL: No OCSP response received");
2937 return (conn->flags & TLS_CONN_REQUIRE_OCSP) ? 0 : 1;
2938 }
2939
2940 wpa_hexdump(MSG_DEBUG, "OpenSSL: OCSP response", p, len);
2941
2942 rsp = d2i_OCSP_RESPONSE(NULL, &p, len);
2943 if (!rsp) {
2944 wpa_printf(MSG_INFO, "OpenSSL: Failed to parse OCSP response");
2945 return 0;
2946 }
2947
2948 ocsp_debug_print_resp(rsp);
2949
2950 status = OCSP_response_status(rsp);
2951 if (status != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
2952 wpa_printf(MSG_INFO, "OpenSSL: OCSP responder error %d (%s)",
2953 status, OCSP_response_status_str(status));
2954 return 0;
2955 }
2956
2957 basic = OCSP_response_get1_basic(rsp);
2958 if (!basic) {
2959 wpa_printf(MSG_INFO, "OpenSSL: Could not find BasicOCSPResponse");
2960 return 0;
2961 }
2962
2963 status = OCSP_basic_verify(basic, NULL, SSL_CTX_get_cert_store(s->ctx),
2964 0);
2965 if (status <= 0) {
2966 tls_show_errors(MSG_INFO, __func__,
2967 "OpenSSL: OCSP response failed verification");
2968 OCSP_BASICRESP_free(basic);
2969 OCSP_RESPONSE_free(rsp);
2970 return 0;
2971 }
2972
2973 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP response verification succeeded");
2974
762c92a4
JM		 2975 if (!conn->peer_cert) {
2976 wpa_printf(MSG_DEBUG, "OpenSSL: Peer certificate not available for OCSP status check");
2977 OCSP_BASICRESP_free(basic);
2978 OCSP_RESPONSE_free(rsp);
2979 return 0;
2980 }
2981
2982 if (!conn->peer_issuer) {
2983 wpa_printf(MSG_DEBUG, "OpenSSL: Peer issuer certificate not available for OCSP status check");
080585c0
JM		 2984 OCSP_BASICRESP_free(basic);
2985 OCSP_RESPONSE_free(rsp);
2986 return 0;
2987 }
2988
2989 id = OCSP_cert_to_id(NULL, conn->peer_cert, conn->peer_issuer);
2990 if (!id) {
2991 wpa_printf(MSG_DEBUG, "OpenSSL: Could not create OCSP certificate identifier");
2992 OCSP_BASICRESP_free(basic);
2993 OCSP_RESPONSE_free(rsp);
2994 return 0;
2995 }
2996
2997 if (!OCSP_resp_find_status(basic, id, &status, &reason, &produced_at,
2998 &this_update, &next_update)) {
2999 wpa_printf(MSG_INFO, "OpenSSL: Could not find current server certificate from OCSP response%s",
3000 (conn->flags & TLS_CONN_REQUIRE_OCSP) ? "" :
3001 " (OCSP not required)");
3002 OCSP_BASICRESP_free(basic);
3003 OCSP_RESPONSE_free(rsp);
3004 return (conn->flags & TLS_CONN_REQUIRE_OCSP) ? 0 : 1;
3005 }
3006
3007 if (!OCSP_check_validity(this_update, next_update, 5 * 60, -1)) {
3008 tls_show_errors(MSG_INFO, __func__,
3009 "OpenSSL: OCSP status times invalid");
3010 OCSP_BASICRESP_free(basic);
3011 OCSP_RESPONSE_free(rsp);
3012 return 0;
3013 }
3014
3015 OCSP_BASICRESP_free(basic);
3016 OCSP_RESPONSE_free(rsp);
3017
3018 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status for server certificate: %s",
3019 OCSP_cert_status_str(status));
3020
3021 if (status == V_OCSP_CERTSTATUS_GOOD)
3022 return 1;
3023 if (status == V_OCSP_CERTSTATUS_REVOKED)
3024 return 0;
3025 if (conn->flags & TLS_CONN_REQUIRE_OCSP) {
3026 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status unknown, but OCSP required");
3027 return 0;
3028 }
be7963b3 3029 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status unknown, but OCSP was not required, so allow connection to continue");
080585c0
JM		 3030 return 1;
3031}
3032
3033
3034static int ocsp_status_cb(SSL *s, void *arg)
3035{
3036 char *tmp;
3037 char *resp;
3038 size_t len;
3039
3040 if (tls_global->ocsp_stapling_response == NULL) {
3041 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - no response configured");
3042 return SSL_TLSEXT_ERR_OK;
3043 }
3044
3045 resp = os_readfile(tls_global->ocsp_stapling_response, &len);
3046 if (resp == NULL) {
3047 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - could not read response file");
3048 /* TODO: Build OCSPResponse with responseStatus = internalError
3049 */
3050 return SSL_TLSEXT_ERR_OK;
3051 }
3052 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - send cached response");
3053 tmp = OPENSSL_malloc(len);
3054 if (tmp == NULL) {
3055 os_free(resp);
3056 return SSL_TLSEXT_ERR_ALERT_FATAL;
3057 }
3058
3059 os_memcpy(tmp, resp, len);
3060 os_free(resp);
3061 SSL_set_tlsext_status_ocsp_resp(s, tmp, len);
3062
3063 return SSL_TLSEXT_ERR_OK;
3064}
3065
3066#endif /* HAVE_OCSP */
3067
3068
6fc6879b
JM		 3069int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
3070 const struct tls_connection_params *params)
3071{
3072 int ret;
3073 unsigned long err;
080585c0 3074 SSL_CTX *ssl_ctx = tls_ctx;
6fc6879b
JM		 3075
3076 if (conn == NULL)
3077 return -1;
3078
3079 while ((err = ERR_get_error())) {
3080 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
3081 __func__, ERR_error_string(err, NULL));
3082 }
3083
e59c91af
DS		 3084 if (params->engine) {
3085 wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine");
3086 ret = tls_engine_init(conn, params->engine_id, params->pin,
3087 params->key_id, params->cert_id,
3088 params->ca_cert_id);
3089 if (ret)
3090 return ret;
3091 }
6fc6879b
JM		 3092 if (tls_connection_set_subject_match(conn,
3093 params->subject_match,
01f809c7
JM		 3094 params->altsubject_match,
3095 params->suffix_match))
6fc6879b 3096 return -1;
e59c91af
DS		 3097
3098 if (params->engine && params->ca_cert_id) {
3099 if (tls_connection_engine_ca_cert(tls_ctx, conn,
3100 params->ca_cert_id))
3101 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
3102 } else if (tls_connection_ca_cert(tls_ctx, conn, params->ca_cert,
3103 params->ca_cert_blob,
3104 params->ca_cert_blob_len,
3105 params->ca_path))
6fc6879b 3106 return -1;
e59c91af
DS		 3107
3108 if (params->engine && params->cert_id) {
3109 if (tls_connection_engine_client_cert(conn, params->cert_id))
3110 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
3111 } else if (tls_connection_client_cert(conn, params->client_cert,
3112 params->client_cert_blob,
3113 params->client_cert_blob_len))
6fc6879b
JM		 3114 return -1;
3115
e59c91af
DS		 3116 if (params->engine && params->key_id) {
3117 wpa_printf(MSG_DEBUG, "TLS: Using private key from engine");
6fc6879b
JM		 3118 if (tls_connection_engine_private_key(conn))
3119 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
3120 } else if (tls_connection_private_key(tls_ctx, conn,
3121 params->private_key,
3122 params->private_key_passwd,
3123 params->private_key_blob,
3124 params->private_key_blob_len)) {
3125 wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'",
3126 params->private_key);
3127 return -1;
3128 }
3129
3130 if (tls_connection_dh(conn, params->dh_file)) {
3131 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
3132 params->dh_file);
3133 return -1;
3134 }
3135
e866f39f
JM		 3136#ifdef SSL_OP_NO_TICKET
3137 if (params->flags & TLS_CONN_DISABLE_SESSION_TICKET)
3138 SSL_set_options(conn->ssl, SSL_OP_NO_TICKET);
d53d2596 3139#ifdef SSL_clear_options
e866f39f
JM		 3140 else
3141 SSL_clear_options(conn->ssl, SSL_OP_NO_TICKET);
d53d2596 3142#endif /* SSL_clear_options */
e866f39f
JM		 3143#endif /* SSL_OP_NO_TICKET */
3144
080585c0
JM		 3145#ifdef HAVE_OCSP
3146 if (params->flags & TLS_CONN_REQUEST_OCSP) {
3147 SSL_set_tlsext_status_type(conn->ssl, TLSEXT_STATUSTYPE_ocsp);
3148 SSL_CTX_set_tlsext_status_cb(ssl_ctx, ocsp_resp_cb);
3149 SSL_CTX_set_tlsext_status_arg(ssl_ctx, conn);
3150 }
3151#endif /* HAVE_OCSP */
3152
235279e7
JM		 3153 conn->flags = params->flags;
3154
6fc6879b
JM		 3155 tls_get_errors(tls_ctx);
3156
3157 return 0;
3158}
3159
3160
3161int tls_global_set_params(void *tls_ctx,
3162 const struct tls_connection_params *params)
3163{
3164 SSL_CTX *ssl_ctx = tls_ctx;
3165 unsigned long err;
3166
3167 while ((err = ERR_get_error())) {
3168 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
3169 __func__, ERR_error_string(err, NULL));
3170 }
3171
3172 if (tls_global_ca_cert(ssl_ctx, params->ca_cert))
3173 return -1;
3174
3175 if (tls_global_client_cert(ssl_ctx, params->client_cert))
3176 return -1;
3177
3178 if (tls_global_private_key(ssl_ctx, params->private_key,
3179 params->private_key_passwd))
3180 return -1;
3181
3182 if (tls_global_dh(ssl_ctx, params->dh_file)) {
3183 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
3184 params->dh_file);
3185 return -1;
3186 }
3187
e866f39f
JM		 3188#ifdef SSL_OP_NO_TICKET
3189 if (params->flags & TLS_CONN_DISABLE_SESSION_TICKET)
3190 SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_TICKET);
d53d2596 3191#ifdef SSL_CTX_clear_options
e866f39f
JM		 3192 else
3193 SSL_CTX_clear_options(ssl_ctx, SSL_OP_NO_TICKET);
d53d2596 3194#endif /* SSL_clear_options */
e866f39f
JM		 3195#endif /* SSL_OP_NO_TICKET */
3196
080585c0
JM		 3197#ifdef HAVE_OCSP
3198 SSL_CTX_set_tlsext_status_cb(ssl_ctx, ocsp_status_cb);
3199 SSL_CTX_set_tlsext_status_arg(ssl_ctx, ssl_ctx);
3200 os_free(tls_global->ocsp_stapling_response);
3201 if (params->ocsp_stapling_response)
3202 tls_global->ocsp_stapling_response =
3203 os_strdup(params->ocsp_stapling_response);
3204 else
3205 tls_global->ocsp_stapling_response = NULL;
3206#endif /* HAVE_OCSP */
3207
6fc6879b
JM		 3208 return 0;
3209}
3210
3211
3212int tls_connection_get_keyblock_size(void *tls_ctx,
3213 struct tls_connection *conn)
3214{
3215 const EVP_CIPHER *c;
3216 const EVP_MD *h;
7f996409 3217 int md_size;
6fc6879b
JM		 3218
3219 if (conn == NULL || conn->ssl == NULL ||
3220 conn->ssl->enc_read_ctx == NULL ||
3221 conn->ssl->enc_read_ctx->cipher == NULL ||
3222 conn->ssl->read_hash == NULL)
3223 return -1;
3224
3225 c = conn->ssl->enc_read_ctx->cipher;
3226#if OPENSSL_VERSION_NUMBER >= 0x00909000L
3227 h = EVP_MD_CTX_md(conn->ssl->read_hash);
3228#else
3229 h = conn->ssl->read_hash;
3230#endif
7f996409
JM		 3231 if (h)
3232 md_size = EVP_MD_size(h);
3233#if OPENSSL_VERSION_NUMBER >= 0x10000000L
3234 else if (conn->ssl->s3)
3235 md_size = conn->ssl->s3->tmp.new_mac_secret_size;
3236#endif
3237 else
3238 return -1;
6fc6879b 3239
7f996409
JM		 3240 wpa_printf(MSG_DEBUG, "OpenSSL: keyblock size: key_len=%d MD_size=%d "
3241 "IV_len=%d", EVP_CIPHER_key_length(c), md_size,
3242 EVP_CIPHER_iv_length(c));
6fc6879b 3243 return 2 * (EVP_CIPHER_key_length(c) +
7f996409 3244 md_size +
6fc6879b
JM		 3245 EVP_CIPHER_iv_length(c));
3246}
3247
3248
3249unsigned int tls_capabilities(void *tls_ctx)
3250{
3251 return 0;
3252}
3253
3254
1e5839e0 3255#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
6fc6879b
JM		 3256/* Pre-shared secred requires a patch to openssl, so this function is
3257 * commented out unless explicitly needed for EAP-FAST in order to be able to
3258 * build this file with unmodified openssl. */
3259
3260static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
3261 STACK_OF(SSL_CIPHER) *peer_ciphers,
3262 SSL_CIPHER **cipher, void *arg)
3263{
3264 struct tls_connection *conn = arg;
3265 int ret;
3266
3267 if (conn == NULL || conn->session_ticket_cb == NULL)
3268 return 0;
3269
3270 ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx,
3271 conn->session_ticket,
3272 conn->session_ticket_len,
3273 s->s3->client_random,
3274 s->s3->server_random, secret);
3275 os_free(conn->session_ticket);
3276 conn->session_ticket = NULL;
3277
3278 if (ret <= 0)
3279 return 0;
3280
3281 *secret_len = SSL_MAX_MASTER_KEY_LENGTH;
3282 return 1;
3283}
3284
3285
0cf03892
JM		 3286#ifdef CONFIG_OPENSSL_TICKET_OVERRIDE
3287static int tls_session_ticket_ext_cb(SSL *s, const unsigned char *data,
3288 int len, void *arg)
3289{
3290 struct tls_connection *conn = arg;
3291
3292 if (conn == NULL || conn->session_ticket_cb == NULL)
3293 return 0;
3294
3295 wpa_printf(MSG_DEBUG, "OpenSSL: %s: length=%d", __func__, len);
3296
3297 os_free(conn->session_ticket);
3298 conn->session_ticket = NULL;
3299
3300 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
3301 "extension", data, len);
3302
3303 conn->session_ticket = os_malloc(len);
3304 if (conn->session_ticket == NULL)
3305 return 0;
3306
3307 os_memcpy(conn->session_ticket, data, len);
3308 conn->session_ticket_len = len;
3309
3310 return 1;
3311}
3312#else /* CONFIG_OPENSSL_TICKET_OVERRIDE */
6fc6879b
JM		 3313#ifdef SSL_OP_NO_TICKET
3314static void tls_hello_ext_cb(SSL *s, int client_server, int type,
3315 unsigned char *data, int len, void *arg)
3316{
3317 struct tls_connection *conn = arg;
3318
3319 if (conn == NULL || conn->session_ticket_cb == NULL)
3320 return;
3321
3322 wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__,
3323 type, len);
3324
3325 if (type == TLSEXT_TYPE_session_ticket && !client_server) {
3326 os_free(conn->session_ticket);
3327 conn->session_ticket = NULL;
3328
3329 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
3330 "extension", data, len);
3331 conn->session_ticket = os_malloc(len);
3332 if (conn->session_ticket == NULL)
3333 return;
3334
3335 os_memcpy(conn->session_ticket, data, len);
3336 conn->session_ticket_len = len;
3337 }
3338}
3339#else /* SSL_OP_NO_TICKET */
3340static int tls_hello_ext_cb(SSL *s, TLS_EXTENSION *ext, void *arg)
3341{
3342 struct tls_connection *conn = arg;
3343
3344 if (conn == NULL || conn->session_ticket_cb == NULL)
3345 return 0;
3346
3347 wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__,
3348 ext->type, ext->length);
3349
3350 os_free(conn->session_ticket);
3351 conn->session_ticket = NULL;
3352
3353 if (ext->type == 35) {
3354 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
3355 "extension", ext->data, ext->length);
3356 conn->session_ticket = os_malloc(ext->length);
3357 if (conn->session_ticket == NULL)
3358 return SSL_AD_INTERNAL_ERROR;
3359
3360 os_memcpy(conn->session_ticket, ext->data, ext->length);
3361 conn->session_ticket_len = ext->length;
3362 }
3363
3364 return 0;
3365}
3366#endif /* SSL_OP_NO_TICKET */
0cf03892 3367#endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */
1e5839e0 3368#endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
6fc6879b
JM		 3369
3370
3371int tls_connection_set_session_ticket_cb(void *tls_ctx,
3372 struct tls_connection *conn,
3373 tls_session_ticket_cb cb,
3374 void *ctx)
3375{
1e5839e0 3376#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
6fc6879b
JM		 3377 conn->session_ticket_cb = cb;
3378 conn->session_ticket_cb_ctx = ctx;
3379
3380 if (cb) {
3381 if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb,
3382 conn) != 1)
3383 return -1;
0cf03892
JM		 3384#ifdef CONFIG_OPENSSL_TICKET_OVERRIDE
3385 SSL_set_session_ticket_ext_cb(conn->ssl,
3386 tls_session_ticket_ext_cb, conn);
3387#else /* CONFIG_OPENSSL_TICKET_OVERRIDE */
6fc6879b
JM		 3388#ifdef SSL_OP_NO_TICKET
3389 SSL_set_tlsext_debug_callback(conn->ssl, tls_hello_ext_cb);
3390 SSL_set_tlsext_debug_arg(conn->ssl, conn);
3391#else /* SSL_OP_NO_TICKET */
3392 if (SSL_set_hello_extension_cb(conn->ssl, tls_hello_ext_cb,
3393 conn) != 1)
3394 return -1;
3395#endif /* SSL_OP_NO_TICKET */
0cf03892 3396#endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */
6fc6879b
JM		 3397 } else {
3398 if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1)
3399 return -1;
0cf03892
JM		 3400#ifdef CONFIG_OPENSSL_TICKET_OVERRIDE
3401 SSL_set_session_ticket_ext_cb(conn->ssl, NULL, NULL);
3402#else /* CONFIG_OPENSSL_TICKET_OVERRIDE */
6fc6879b
JM		 3403#ifdef SSL_OP_NO_TICKET
3404 SSL_set_tlsext_debug_callback(conn->ssl, NULL);
3405 SSL_set_tlsext_debug_arg(conn->ssl, conn);
3406#else /* SSL_OP_NO_TICKET */
3407 if (SSL_set_hello_extension_cb(conn->ssl, NULL, NULL) != 1)
3408 return -1;
3409#endif /* SSL_OP_NO_TICKET */
0cf03892 3410#endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */
6fc6879b
JM		 3411 }
3412
3413 return 0;
1e5839e0 3414#else /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
6fc6879b 3415 return -1;
1e5839e0 3416#endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
6fc6879b 3417}
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