1 /*
2 * SSL/TLS interface functions for OpenSSL
3 * Copyright (c) 2004-2015, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10
11 #ifndef CONFIG_SMARTCARD
12 #ifndef OPENSSL_NO_ENGINE
13 #ifndef ANDROID
14 #define OPENSSL_NO_ENGINE
15 #endif
16 #endif
17 #endif
18
19 #include <openssl/ssl.h>
20 #include <openssl/err.h>
21 #include <openssl/opensslv.h>
22 #include <openssl/pkcs12.h>
23 #include <openssl/x509v3.h>
24 #ifndef OPENSSL_NO_ENGINE
25 #include <openssl/engine.h>
26 #endif /* OPENSSL_NO_ENGINE */
27 #ifndef OPENSSL_NO_DSA
28 #include <openssl/dsa.h>
29 #endif
30 #ifndef OPENSSL_NO_DH
31 #include <openssl/dh.h>
32 #endif
33
34 #include "common.h"
35 #include "crypto.h"
36 #include "sha1.h"
37 #include "sha256.h"
38 #include "tls.h"
39 #include "tls_openssl.h"
40 #ifdef CONFIG_OHOS_CERTMGR
41 #include "wpa_evp_key.h"
42 #endif
43
44 #define OH_PREFIX "oh:"
45
46 #if !defined(CONFIG_FIPS) && \
47 (defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || \
48 defined(EAP_SERVER_FAST))
49 #define OPENSSL_NEED_EAP_FAST_PRF
50 #endif
51
52 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || \
53 defined(EAP_SERVER_FAST) || defined(EAP_TEAP) || \
54 defined(EAP_SERVER_TEAP)
55 #define EAP_FAST_OR_TEAP
56 #endif
57
58
59 #if defined(OPENSSL_IS_BORINGSSL)
60 /* stack_index_t is the return type of OpenSSL's sk_XXX_num() functions. */
61 typedef size_t stack_index_t;
62 #else
63 typedef int stack_index_t;
64 #endif
65
66 #ifdef SSL_set_tlsext_status_type
67 #ifndef OPENSSL_NO_TLSEXT
68 #define HAVE_OCSP
69 #include <openssl/ocsp.h>
70 #endif /* OPENSSL_NO_TLSEXT */
71 #endif /* SSL_set_tlsext_status_type */
72
73 #if (OPENSSL_VERSION_NUMBER < 0x10100000L || \
74 (defined(LIBRESSL_VERSION_NUMBER) && \
75 LIBRESSL_VERSION_NUMBER < 0x20700000L)) && \
76 !defined(BORINGSSL_API_VERSION)
77 /*
78 * SSL_get_client_random() and SSL_get_server_random() were added in OpenSSL
79 * 1.1.0 and newer BoringSSL revisions. Provide compatibility wrappers for
80 * older versions.
81 */
82
SSL_get_client_random(const SSL * ssl,unsigned char * out,size_t outlen)83 static size_t SSL_get_client_random(const SSL *ssl, unsigned char *out,
84 size_t outlen)
85 {
86 if (!ssl->s3 || outlen < SSL3_RANDOM_SIZE)
87 return 0;
88 os_memcpy(out, ssl->s3->client_random, SSL3_RANDOM_SIZE);
89 return SSL3_RANDOM_SIZE;
90 }
91
92
SSL_get_server_random(const SSL * ssl,unsigned char * out,size_t outlen)93 static size_t SSL_get_server_random(const SSL *ssl, unsigned char *out,
94 size_t outlen)
95 {
96 if (!ssl->s3 || outlen < SSL3_RANDOM_SIZE)
97 return 0;
98 os_memcpy(out, ssl->s3->server_random, SSL3_RANDOM_SIZE);
99 return SSL3_RANDOM_SIZE;
100 }
101
102
103 #ifdef OPENSSL_NEED_EAP_FAST_PRF
SSL_SESSION_get_master_key(const SSL_SESSION * session,unsigned char * out,size_t outlen)104 static size_t SSL_SESSION_get_master_key(const SSL_SESSION *session,
105 unsigned char *out, size_t outlen)
106 {
107 if (!session || session->master_key_length < 0 ||
108 (size_t) session->master_key_length > outlen)
109 return 0;
110 if ((size_t) session->master_key_length < outlen)
111 outlen = session->master_key_length;
112 os_memcpy(out, session->master_key, outlen);
113 return outlen;
114 }
115 #endif /* OPENSSL_NEED_EAP_FAST_PRF */
116
117 #endif
118
119 #if OPENSSL_VERSION_NUMBER < 0x10100000L || \
120 (defined(LIBRESSL_VERSION_NUMBER) && \
121 LIBRESSL_VERSION_NUMBER < 0x20700000L)
122 #ifdef CONFIG_SUITEB
RSA_bits(const RSA * r)123 static int RSA_bits(const RSA *r)
124 {
125 return BN_num_bits(r->n);
126 }
127 #endif /* CONFIG_SUITEB */
128
129
ASN1_STRING_get0_data(const ASN1_STRING * x)130 static const unsigned char * ASN1_STRING_get0_data(const ASN1_STRING *x)
131 {
132 return ASN1_STRING_data((ASN1_STRING *) x);
133 }
134 #endif
135
136 #ifdef ANDROID
137 #include <openssl/pem.h>
138 #include <keystore/keystore_get.h>
139
BIO_from_keystore(const char * key)140 static BIO * BIO_from_keystore(const char *key)
141 {
142 BIO *bio = NULL;
143 uint8_t *value = NULL;
144 int length = keystore_get(key, strlen(key), &value);
145 if (length != -1 && (bio = BIO_new(BIO_s_mem())) != NULL)
146 BIO_write(bio, value, length);
147 free(value);
148 return bio;
149 }
150
151
tls_add_ca_from_keystore(X509_STORE * ctx,const char * key_alias)152 static int tls_add_ca_from_keystore(X509_STORE *ctx, const char *key_alias)
153 {
154 BIO *bio = BIO_from_keystore(key_alias);
155 STACK_OF(X509_INFO) *stack = NULL;
156 stack_index_t i;
157
158 if (bio) {
159 stack = PEM_X509_INFO_read_bio(bio, NULL, NULL, NULL);
160 BIO_free(bio);
161 }
162
163 if (!stack) {
164 wpa_printf(MSG_WARNING, "TLS: Failed to parse certificate: %s",
165 key_alias);
166 return -1;
167 }
168
169 for (i = 0; i < sk_X509_INFO_num(stack); ++i) {
170 X509_INFO *info = sk_X509_INFO_value(stack, i);
171
172 if (info->x509)
173 X509_STORE_add_cert(ctx, info->x509);
174 if (info->crl)
175 X509_STORE_add_crl(ctx, info->crl);
176 }
177
178 sk_X509_INFO_pop_free(stack, X509_INFO_free);
179
180 return 0;
181 }
182
183
tls_add_ca_from_keystore_encoded(X509_STORE * ctx,const char * encoded_key_alias)184 static int tls_add_ca_from_keystore_encoded(X509_STORE *ctx,
185 const char *encoded_key_alias)
186 {
187 int rc = -1;
188 int len = os_strlen(encoded_key_alias);
189 unsigned char *decoded_alias;
190
191 if (len & 1) {
192 wpa_printf(MSG_WARNING, "Invalid hex-encoded alias: %s",
193 encoded_key_alias);
194 return rc;
195 }
196
197 decoded_alias = os_malloc(len / 2 + 1);
198 if (decoded_alias) {
199 if (!hexstr2bin(encoded_key_alias, decoded_alias, len / 2)) {
200 decoded_alias[len / 2] = '\0';
201 rc = tls_add_ca_from_keystore(
202 ctx, (const char *) decoded_alias);
203 }
204 os_free(decoded_alias);
205 }
206
207 return rc;
208 }
209
210 #endif /* ANDROID */
211
212 static int tls_openssl_ref_count = 0;
213 static int tls_ex_idx_session = -1;
214
215 struct tls_context {
216 void (*event_cb)(void *ctx, enum tls_event ev,
217 union tls_event_data *data);
218 void *cb_ctx;
219 int cert_in_cb;
220 char *ocsp_stapling_response;
221 };
222
223 static struct tls_context *tls_global = NULL;
224
225
226 struct tls_data {
227 SSL_CTX *ssl;
228 unsigned int tls_session_lifetime;
229 int check_crl;
230 int check_crl_strict;
231 char *ca_cert;
232 unsigned int crl_reload_interval;
233 struct os_reltime crl_last_reload;
234 char *check_cert_subject;
235 };
236
237 struct tls_connection {
238 struct tls_context *context;
239 struct tls_data *data;
240 SSL_CTX *ssl_ctx;
241 SSL *ssl;
242 BIO *ssl_in, *ssl_out;
243 #if defined(ANDROID) || !defined(OPENSSL_NO_ENGINE)
244 ENGINE *engine; /* functional reference to the engine */
245 EVP_PKEY *private_key; /* the private key if using engine */
246 #endif /* OPENSSL_NO_ENGINE */
247 char *subject_match, *altsubject_match, *suffix_match, *domain_match;
248 char *check_cert_subject;
249 int read_alerts, write_alerts, failed;
250
251 tls_session_ticket_cb session_ticket_cb;
252 void *session_ticket_cb_ctx;
253
254 /* SessionTicket received from OpenSSL hello_extension_cb (server) */
255 u8 *session_ticket;
256 size_t session_ticket_len;
257
258 unsigned int ca_cert_verify:1;
259 unsigned int cert_probe:1;
260 unsigned int server_cert_only:1;
261 unsigned int invalid_hb_used:1;
262 unsigned int success_data:1;
263 unsigned int client_hello_generated:1;
264 unsigned int server:1;
265
266 u8 srv_cert_hash[32];
267
268 unsigned int flags;
269
270 X509 *peer_cert;
271 X509 *peer_issuer;
272 X509 *peer_issuer_issuer;
273 char *peer_subject; /* peer subject info for authenticated peer */
274
275 unsigned char client_random[SSL3_RANDOM_SIZE];
276 unsigned char server_random[SSL3_RANDOM_SIZE];
277
278 u16 cipher_suite;
279 int server_dh_prime_len;
280 };
281
282
tls_context_new(const struct tls_config * conf)283 static struct tls_context * tls_context_new(const struct tls_config *conf)
284 {
285 struct tls_context *context = os_zalloc(sizeof(*context));
286 if (context == NULL)
287 return NULL;
288 if (conf) {
289 context->event_cb = conf->event_cb;
290 context->cb_ctx = conf->cb_ctx;
291 context->cert_in_cb = conf->cert_in_cb;
292 }
293 return context;
294 }
295
296
297 #ifdef CONFIG_NO_STDOUT_DEBUG
298
_tls_show_errors(void)299 static void _tls_show_errors(void)
300 {
301 unsigned long err;
302
303 while ((err = ERR_get_error())) {
304 /* Just ignore the errors, since stdout is disabled */
305 }
306 }
307 #define tls_show_errors(l, f, t) _tls_show_errors()
308
309 #else /* CONFIG_NO_STDOUT_DEBUG */
310
tls_show_errors(int level,const char * func,const char * txt)311 static void tls_show_errors(int level, const char *func, const char *txt)
312 {
313 unsigned long err;
314
315 wpa_printf(level, "OpenSSL: %s - %s %s",
316 func, txt, ERR_error_string(ERR_get_error(), NULL));
317
318 while ((err = ERR_get_error())) {
319 wpa_printf(MSG_INFO, "OpenSSL: pending error: %s",
320 ERR_error_string(err, NULL));
321 }
322 }
323
324 #endif /* CONFIG_NO_STDOUT_DEBUG */
325
326
tls_crl_cert_reload(const char * ca_cert,int check_crl)327 static X509_STORE * tls_crl_cert_reload(const char *ca_cert, int check_crl)
328 {
329 int flags;
330 X509_STORE *store;
331
332 store = X509_STORE_new();
333 if (!store) {
334 wpa_printf(MSG_DEBUG,
335 "OpenSSL: %s - failed to allocate new certificate store",
336 __func__);
337 return NULL;
338 }
339
340 if (ca_cert && X509_STORE_load_locations(store, ca_cert, NULL) != 1) {
341 tls_show_errors(MSG_WARNING, __func__,
342 "Failed to load root certificates");
343 X509_STORE_free(store);
344 return NULL;
345 }
346
347 flags = check_crl ? X509_V_FLAG_CRL_CHECK : 0;
348 if (check_crl == 2)
349 flags |= X509_V_FLAG_CRL_CHECK_ALL;
350
351 X509_STORE_set_flags(store, flags);
352
353 return store;
354 }
355
356
357 #ifdef CONFIG_NATIVE_WINDOWS
358
359 /* Windows CryptoAPI and access to certificate stores */
360 #include <wincrypt.h>
361
362 #ifdef __MINGW32_VERSION
363 /*
364 * MinGW does not yet include all the needed definitions for CryptoAPI, so
365 * define here whatever extra is needed.
366 */
367 #define CERT_SYSTEM_STORE_CURRENT_USER (1 << 16)
368 #define CERT_STORE_READONLY_FLAG 0x00008000
369 #define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000
370
371 #endif /* __MINGW32_VERSION */
372
373
374 struct cryptoapi_rsa_data {
375 const CERT_CONTEXT *cert;
376 HCRYPTPROV crypt_prov;
377 DWORD key_spec;
378 BOOL free_crypt_prov;
379 };
380
381
cryptoapi_error(const char * msg)382 static void cryptoapi_error(const char *msg)
383 {
384 wpa_printf(MSG_INFO, "CryptoAPI: %s; err=%u",
385 msg, (unsigned int) GetLastError());
386 }
387
388
cryptoapi_rsa_pub_enc(int flen,const unsigned char * from,unsigned char * to,RSA * rsa,int padding)389 static int cryptoapi_rsa_pub_enc(int flen, const unsigned char *from,
390 unsigned char *to, RSA *rsa, int padding)
391 {
392 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
393 return 0;
394 }
395
396
cryptoapi_rsa_pub_dec(int flen,const unsigned char * from,unsigned char * to,RSA * rsa,int padding)397 static int cryptoapi_rsa_pub_dec(int flen, const unsigned char *from,
398 unsigned char *to, RSA *rsa, int padding)
399 {
400 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
401 return 0;
402 }
403
404
cryptoapi_rsa_priv_enc(int flen,const unsigned char * from,unsigned char * to,RSA * rsa,int padding)405 static int cryptoapi_rsa_priv_enc(int flen, const unsigned char *from,
406 unsigned char *to, RSA *rsa, int padding)
407 {
408 struct cryptoapi_rsa_data *priv =
409 (struct cryptoapi_rsa_data *) rsa->meth->app_data;
410 HCRYPTHASH hash;
411 DWORD hash_size, len, i;
412 unsigned char *buf = NULL;
413 int ret = 0;
414
415 if (priv == NULL) {
416 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
417 ERR_R_PASSED_NULL_PARAMETER);
418 return 0;
419 }
420
421 if (padding != RSA_PKCS1_PADDING) {
422 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
423 RSA_R_UNKNOWN_PADDING_TYPE);
424 return 0;
425 }
426
427 if (flen != 16 /* MD5 */ + 20 /* SHA-1 */) {
428 wpa_printf(MSG_INFO, "%s - only MD5-SHA1 hash supported",
429 __func__);
430 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
431 RSA_R_INVALID_MESSAGE_LENGTH);
432 return 0;
433 }
434
435 if (!CryptCreateHash(priv->crypt_prov, CALG_SSL3_SHAMD5, 0, 0, &hash))
436 {
437 cryptoapi_error("CryptCreateHash failed");
438 return 0;
439 }
440
441 len = sizeof(hash_size);
442 if (!CryptGetHashParam(hash, HP_HASHSIZE, (BYTE *) &hash_size, &len,
443 0)) {
444 cryptoapi_error("CryptGetHashParam failed");
445 goto err;
446 }
447
448 if ((int) hash_size != flen) {
449 wpa_printf(MSG_INFO, "CryptoAPI: Invalid hash size (%u != %d)",
450 (unsigned) hash_size, flen);
451 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
452 RSA_R_INVALID_MESSAGE_LENGTH);
453 goto err;
454 }
455 if (!CryptSetHashParam(hash, HP_HASHVAL, (BYTE * ) from, 0)) {
456 cryptoapi_error("CryptSetHashParam failed");
457 goto err;
458 }
459
460 len = RSA_size(rsa);
461 buf = os_malloc(len);
462 if (buf == NULL) {
463 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_MALLOC_FAILURE);
464 goto err;
465 }
466
467 if (!CryptSignHash(hash, priv->key_spec, NULL, 0, buf, &len)) {
468 cryptoapi_error("CryptSignHash failed");
469 goto err;
470 }
471
472 for (i = 0; i < len; i++)
473 to[i] = buf[len - i - 1];
474 ret = len;
475
476 err:
477 os_free(buf);
478 CryptDestroyHash(hash);
479
480 return ret;
481 }
482
483
cryptoapi_rsa_priv_dec(int flen,const unsigned char * from,unsigned char * to,RSA * rsa,int padding)484 static int cryptoapi_rsa_priv_dec(int flen, const unsigned char *from,
485 unsigned char *to, RSA *rsa, int padding)
486 {
487 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
488 return 0;
489 }
490
491
cryptoapi_free_data(struct cryptoapi_rsa_data * priv)492 static void cryptoapi_free_data(struct cryptoapi_rsa_data *priv)
493 {
494 if (priv == NULL)
495 return;
496 if (priv->crypt_prov && priv->free_crypt_prov)
497 CryptReleaseContext(priv->crypt_prov, 0);
498 if (priv->cert)
499 CertFreeCertificateContext(priv->cert);
500 os_free(priv);
501 }
502
503
cryptoapi_finish(RSA * rsa)504 static int cryptoapi_finish(RSA *rsa)
505 {
506 cryptoapi_free_data((struct cryptoapi_rsa_data *) rsa->meth->app_data);
507 os_free((void *) rsa->meth);
508 rsa->meth = NULL;
509 return 1;
510 }
511
512
cryptoapi_find_cert(const char * name,DWORD store)513 static const CERT_CONTEXT * cryptoapi_find_cert(const char *name, DWORD store)
514 {
515 HCERTSTORE cs;
516 const CERT_CONTEXT *ret = NULL;
517
518 cs = CertOpenStore((LPCSTR) CERT_STORE_PROV_SYSTEM, 0, 0,
519 store | CERT_STORE_OPEN_EXISTING_FLAG |
520 CERT_STORE_READONLY_FLAG, L"MY");
521 if (cs == NULL) {
522 cryptoapi_error("Failed to open 'My system store'");
523 return NULL;
524 }
525
526 if (strncmp(name, "cert://", 7) == 0) {
527 unsigned short wbuf[255];
528 MultiByteToWideChar(CP_ACP, 0, name + 7, -1, wbuf, 255);
529 ret = CertFindCertificateInStore(cs, X509_ASN_ENCODING |
530 PKCS_7_ASN_ENCODING,
531 0, CERT_FIND_SUBJECT_STR,
532 wbuf, NULL);
533 } else if (strncmp(name, "hash://", 7) == 0) {
534 CRYPT_HASH_BLOB blob;
535 int len;
536 const char *hash = name + 7;
537 unsigned char *buf;
538
539 len = os_strlen(hash) / 2;
540 buf = os_malloc(len);
541 if (buf && hexstr2bin(hash, buf, len) == 0) {
542 blob.cbData = len;
543 blob.pbData = buf;
544 ret = CertFindCertificateInStore(cs,
545 X509_ASN_ENCODING |
546 PKCS_7_ASN_ENCODING,
547 0, CERT_FIND_HASH,
548 &blob, NULL);
549 }
550 os_free(buf);
551 }
552
553 CertCloseStore(cs, 0);
554
555 return ret;
556 }
557
558
tls_cryptoapi_cert(SSL * ssl,const char * name)559 static int tls_cryptoapi_cert(SSL *ssl, const char *name)
560 {
561 X509 *cert = NULL;
562 RSA *rsa = NULL, *pub_rsa;
563 struct cryptoapi_rsa_data *priv;
564 RSA_METHOD *rsa_meth;
565
566 if (name == NULL ||
567 (strncmp(name, "cert://", 7) != 0 &&
568 strncmp(name, "hash://", 7) != 0))
569 return -1;
570
571 priv = os_zalloc(sizeof(*priv));
572 rsa_meth = os_zalloc(sizeof(*rsa_meth));
573 if (priv == NULL || rsa_meth == NULL) {
574 wpa_printf(MSG_WARNING, "CryptoAPI: Failed to allocate memory "
575 "for CryptoAPI RSA method");
576 os_free(priv);
577 os_free(rsa_meth);
578 return -1;
579 }
580
581 priv->cert = cryptoapi_find_cert(name, CERT_SYSTEM_STORE_CURRENT_USER);
582 if (priv->cert == NULL) {
583 priv->cert = cryptoapi_find_cert(
584 name, CERT_SYSTEM_STORE_LOCAL_MACHINE);
585 }
586 if (priv->cert == NULL) {
587 wpa_printf(MSG_INFO, "CryptoAPI: Could not find certificate "
588 "'%s'", name);
589 goto err;
590 }
591
592 cert = d2i_X509(NULL,
593 (const unsigned char **) &priv->cert->pbCertEncoded,
594 priv->cert->cbCertEncoded);
595 if (cert == NULL) {
596 wpa_printf(MSG_INFO, "CryptoAPI: Could not process X509 DER "
597 "encoding");
598 goto err;
599 }
600
601 if (!CryptAcquireCertificatePrivateKey(priv->cert,
602 CRYPT_ACQUIRE_COMPARE_KEY_FLAG,
603 NULL, &priv->crypt_prov,
604 &priv->key_spec,
605 &priv->free_crypt_prov)) {
606 cryptoapi_error("Failed to acquire a private key for the "
607 "certificate");
608 goto err;
609 }
610
611 rsa_meth->name = "Microsoft CryptoAPI RSA Method";
612 rsa_meth->rsa_pub_enc = cryptoapi_rsa_pub_enc;
613 rsa_meth->rsa_pub_dec = cryptoapi_rsa_pub_dec;
614 rsa_meth->rsa_priv_enc = cryptoapi_rsa_priv_enc;
615 rsa_meth->rsa_priv_dec = cryptoapi_rsa_priv_dec;
616 rsa_meth->finish = cryptoapi_finish;
617 rsa_meth->flags = RSA_METHOD_FLAG_NO_CHECK;
618 rsa_meth->app_data = (char *) priv;
619
620 rsa = RSA_new();
621 if (rsa == NULL) {
622 SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE,
623 ERR_R_MALLOC_FAILURE);
624 goto err;
625 }
626
627 if (!SSL_use_certificate(ssl, cert)) {
628 RSA_free(rsa);
629 rsa = NULL;
630 goto err;
631 }
632 pub_rsa = cert->cert_info->key->pkey->pkey.rsa;
633 X509_free(cert);
634 cert = NULL;
635
636 rsa->n = BN_dup(pub_rsa->n);
637 rsa->e = BN_dup(pub_rsa->e);
638 if (!RSA_set_method(rsa, rsa_meth))
639 goto err;
640
641 if (!SSL_use_RSAPrivateKey(ssl, rsa))
642 goto err;
643 RSA_free(rsa);
644
645 return 0;
646
647 err:
648 if (cert)
649 X509_free(cert);
650 if (rsa)
651 RSA_free(rsa);
652 else {
653 os_free(rsa_meth);
654 cryptoapi_free_data(priv);
655 }
656 return -1;
657 }
658
659
tls_cryptoapi_ca_cert(SSL_CTX * ssl_ctx,SSL * ssl,const char * name)660 static int tls_cryptoapi_ca_cert(SSL_CTX *ssl_ctx, SSL *ssl, const char *name)
661 {
662 HCERTSTORE cs;
663 PCCERT_CONTEXT ctx = NULL;
664 X509 *cert;
665 char buf[128];
666 const char *store;
667 #ifdef UNICODE
668 WCHAR *wstore;
669 #endif /* UNICODE */
670
671 if (name == NULL || strncmp(name, "cert_store://", 13) != 0)
672 return -1;
673
674 store = name + 13;
675 #ifdef UNICODE
676 wstore = os_malloc((os_strlen(store) + 1) * sizeof(WCHAR));
677 if (wstore == NULL)
678 return -1;
679 wsprintf(wstore, L"%S", store);
680 cs = CertOpenSystemStore(0, wstore);
681 os_free(wstore);
682 #else /* UNICODE */
683 cs = CertOpenSystemStore(0, store);
684 #endif /* UNICODE */
685 if (cs == NULL) {
686 wpa_printf(MSG_DEBUG, "%s: failed to open system cert store "
687 "'%s': error=%d", __func__, store,
688 (int) GetLastError());
689 return -1;
690 }
691
692 while ((ctx = CertEnumCertificatesInStore(cs, ctx))) {
693 cert = d2i_X509(NULL,
694 (const unsigned char **) &ctx->pbCertEncoded,
695 ctx->cbCertEncoded);
696 if (cert == NULL) {
697 wpa_printf(MSG_INFO, "CryptoAPI: Could not process "
698 "X509 DER encoding for CA cert");
699 continue;
700 }
701
702 X509_NAME_oneline(X509_get_subject_name(cert), buf,
703 sizeof(buf));
704 wpa_printf(MSG_DEBUG, "OpenSSL: Loaded CA certificate for "
705 "system certificate store: subject='%s'", buf);
706
707 if (!X509_STORE_add_cert(SSL_CTX_get_cert_store(ssl_ctx),
708 cert)) {
709 tls_show_errors(MSG_WARNING, __func__,
710 "Failed to add ca_cert to OpenSSL "
711 "certificate store");
712 }
713
714 X509_free(cert);
715 }
716
717 if (!CertCloseStore(cs, 0)) {
718 wpa_printf(MSG_DEBUG, "%s: failed to close system cert store "
719 "'%s': error=%d", __func__, name + 13,
720 (int) GetLastError());
721 }
722
723 return 0;
724 }
725
726
727 #else /* CONFIG_NATIVE_WINDOWS */
728
tls_cryptoapi_cert(SSL * ssl,const char * name)729 static int tls_cryptoapi_cert(SSL *ssl, const char *name)
730 {
731 return -1;
732 }
733
734 #endif /* CONFIG_NATIVE_WINDOWS */
735
736
ssl_info_cb(const SSL * ssl,int where,int ret)737 static void ssl_info_cb(const SSL *ssl, int where, int ret)
738 {
739 const char *str;
740 int w;
741
742 wpa_printf(MSG_DEBUG, "SSL: (where=0x%x ret=0x%x)", where, ret);
743 w = where & ~SSL_ST_MASK;
744 if (w & SSL_ST_CONNECT)
745 str = "SSL_connect";
746 else if (w & SSL_ST_ACCEPT)
747 str = "SSL_accept";
748 else
749 str = "undefined";
750
751 if (where & SSL_CB_LOOP) {
752 wpa_printf(MSG_DEBUG, "SSL: %s:%s",
753 str, SSL_state_string_long(ssl));
754 } else if (where & SSL_CB_ALERT) {
755 struct tls_connection *conn = SSL_get_app_data((SSL *) ssl);
756 wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s",
757 where & SSL_CB_READ ?
758 "read (remote end reported an error)" :
759 "write (local SSL3 detected an error)",
760 SSL_alert_type_string_long(ret),
761 SSL_alert_desc_string_long(ret));
762 if ((ret >> 8) == SSL3_AL_FATAL) {
763 if (where & SSL_CB_READ)
764 conn->read_alerts++;
765 else
766 conn->write_alerts++;
767 }
768 if (conn->context->event_cb != NULL) {
769 union tls_event_data ev;
770 struct tls_context *context = conn->context;
771 os_memset(&ev, 0, sizeof(ev));
772 ev.alert.is_local = !(where & SSL_CB_READ);
773 ev.alert.type = SSL_alert_type_string_long(ret);
774 ev.alert.description = SSL_alert_desc_string_long(ret);
775 context->event_cb(context->cb_ctx, TLS_ALERT, &ev);
776 }
777 } else if (where & SSL_CB_EXIT && ret <= 0) {
778 wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s",
779 str, ret == 0 ? "failed" : "error",
780 SSL_state_string_long(ssl));
781 }
782 }
783
784
785 #ifndef OPENSSL_NO_ENGINE
786 /**
787 * tls_engine_load_dynamic_generic - load any openssl engine
788 * @pre: an array of commands and values that load an engine initialized
789 * in the engine specific function
790 * @post: an array of commands and values that initialize an already loaded
791 * engine (or %NULL if not required)
792 * @id: the engine id of the engine to load (only required if post is not %NULL
793 *
794 * This function is a generic function that loads any openssl engine.
795 *
796 * Returns: 0 on success, -1 on failure
797 */
tls_engine_load_dynamic_generic(const char * pre[],const char * post[],const char * id)798 static int tls_engine_load_dynamic_generic(const char *pre[],
799 const char *post[], const char *id)
800 {
801 ENGINE *engine;
802 const char *dynamic_id = "dynamic";
803
804 engine = ENGINE_by_id(id);
805 if (engine) {
806 wpa_printf(MSG_DEBUG, "ENGINE: engine '%s' is already "
807 "available", id);
808 /*
809 * If it was auto-loaded by ENGINE_by_id() we might still
810 * need to tell it which PKCS#11 module to use in legacy
811 * (non-p11-kit) environments. Do so now; even if it was
812 * properly initialised before, setting it again will be
813 * harmless.
814 */
815 goto found;
816 }
817 ERR_clear_error();
818
819 engine = ENGINE_by_id(dynamic_id);
820 if (engine == NULL) {
821 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
822 dynamic_id,
823 ERR_error_string(ERR_get_error(), NULL));
824 return -1;
825 }
826
827 /* Perform the pre commands. This will load the engine. */
828 while (pre && pre[0]) {
829 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", pre[0], pre[1]);
830 if (ENGINE_ctrl_cmd_string(engine, pre[0], pre[1], 0) == 0) {
831 wpa_printf(MSG_INFO, "ENGINE: ctrl cmd_string failed: "
832 "%s %s [%s]", pre[0], pre[1],
833 ERR_error_string(ERR_get_error(), NULL));
834 ENGINE_free(engine);
835 return -1;
836 }
837 pre += 2;
838 }
839
840 /*
841 * Free the reference to the "dynamic" engine. The loaded engine can
842 * now be looked up using ENGINE_by_id().
843 */
844 ENGINE_free(engine);
845
846 engine = ENGINE_by_id(id);
847 if (engine == NULL) {
848 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
849 id, ERR_error_string(ERR_get_error(), NULL));
850 return -1;
851 }
852 found:
853 while (post && post[0]) {
854 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", post[0], post[1]);
855 if (ENGINE_ctrl_cmd_string(engine, post[0], post[1], 0) == 0) {
856 wpa_printf(MSG_DEBUG, "ENGINE: ctrl cmd_string failed:"
857 " %s %s [%s]", post[0], post[1],
858 ERR_error_string(ERR_get_error(), NULL));
859 ENGINE_remove(engine);
860 ENGINE_free(engine);
861 return -1;
862 }
863 post += 2;
864 }
865 ENGINE_free(engine);
866
867 return 0;
868 }
869
870
871 /**
872 * tls_engine_load_dynamic_pkcs11 - load the pkcs11 engine provided by opensc
873 * @pkcs11_so_path: pksc11_so_path from the configuration
874 * @pcks11_module_path: pkcs11_module_path from the configuration
875 */
tls_engine_load_dynamic_pkcs11(const char * pkcs11_so_path,const char * pkcs11_module_path)876 static int tls_engine_load_dynamic_pkcs11(const char *pkcs11_so_path,
877 const char *pkcs11_module_path)
878 {
879 char *engine_id = "pkcs11";
880 const char *pre_cmd[] = {
881 "SO_PATH", NULL /* pkcs11_so_path */,
882 "ID", NULL /* engine_id */,
883 "LIST_ADD", "1",
884 /* "NO_VCHECK", "1", */
885 "LOAD", NULL,
886 NULL, NULL
887 };
888 const char *post_cmd[] = {
889 "MODULE_PATH", NULL /* pkcs11_module_path */,
890 NULL, NULL
891 };
892
893 if (!pkcs11_so_path)
894 return 0;
895
896 pre_cmd[1] = pkcs11_so_path;
897 pre_cmd[3] = engine_id;
898 if (pkcs11_module_path)
899 post_cmd[1] = pkcs11_module_path;
900 else
901 post_cmd[0] = NULL;
902
903 wpa_printf(MSG_DEBUG, "ENGINE: Loading pkcs11 Engine from %s",
904 pkcs11_so_path);
905
906 return tls_engine_load_dynamic_generic(pre_cmd, post_cmd, engine_id);
907 }
908
909
910 /**
911 * tls_engine_load_dynamic_opensc - load the opensc engine provided by opensc
912 * @opensc_so_path: opensc_so_path from the configuration
913 */
tls_engine_load_dynamic_opensc(const char * opensc_so_path)914 static int tls_engine_load_dynamic_opensc(const char *opensc_so_path)
915 {
916 char *engine_id = "opensc";
917 const char *pre_cmd[] = {
918 "SO_PATH", NULL /* opensc_so_path */,
919 "ID", NULL /* engine_id */,
920 "LIST_ADD", "1",
921 "LOAD", NULL,
922 NULL, NULL
923 };
924
925 if (!opensc_so_path)
926 return 0;
927
928 pre_cmd[1] = opensc_so_path;
929 pre_cmd[3] = engine_id;
930
931 wpa_printf(MSG_DEBUG, "ENGINE: Loading OpenSC Engine from %s",
932 opensc_so_path);
933
934 return tls_engine_load_dynamic_generic(pre_cmd, NULL, engine_id);
935 }
936 #endif /* OPENSSL_NO_ENGINE */
937
938
remove_session_cb(SSL_CTX * ctx,SSL_SESSION * sess)939 static void remove_session_cb(SSL_CTX *ctx, SSL_SESSION *sess)
940 {
941 struct wpabuf *buf;
942
943 if (tls_ex_idx_session < 0)
944 return;
945 buf = SSL_SESSION_get_ex_data(sess, tls_ex_idx_session);
946 if (!buf)
947 return;
948 wpa_printf(MSG_DEBUG,
949 "OpenSSL: Free application session data %p (sess %p)",
950 buf, sess);
951 wpabuf_free(buf);
952
953 SSL_SESSION_set_ex_data(sess, tls_ex_idx_session, NULL);
954 }
955
956
tls_init(const struct tls_config * conf)957 void * tls_init(const struct tls_config *conf)
958 {
959 struct tls_data *data;
960 SSL_CTX *ssl;
961 struct tls_context *context;
962 const char *ciphers;
963
964 if (tls_openssl_ref_count == 0) {
965 void openssl_load_legacy_provider(void);
966
967 openssl_load_legacy_provider();
968
969 tls_global = context = tls_context_new(conf);
970 if (context == NULL)
971 return NULL;
972 #ifdef CONFIG_FIPS
973 #ifdef OPENSSL_FIPS
974 if (conf && conf->fips_mode) {
975 static int fips_enabled = 0;
976
977 if (!fips_enabled && !FIPS_mode_set(1)) {
978 wpa_printf(MSG_ERROR, "Failed to enable FIPS "
979 "mode");
980 ERR_load_crypto_strings();
981 ERR_print_errors_fp(stderr);
982 os_free(tls_global);
983 tls_global = NULL;
984 return NULL;
985 } else {
986 wpa_printf(MSG_INFO, "Running in FIPS mode");
987 fips_enabled = 1;
988 }
989 }
990 #else /* OPENSSL_FIPS */
991 if (conf && conf->fips_mode) {
992 wpa_printf(MSG_ERROR, "FIPS mode requested, but not "
993 "supported");
994 os_free(tls_global);
995 tls_global = NULL;
996 return NULL;
997 }
998 #endif /* OPENSSL_FIPS */
999 #endif /* CONFIG_FIPS */
1000 #if OPENSSL_VERSION_NUMBER < 0x10100000L || \
1001 (defined(LIBRESSL_VERSION_NUMBER) && \
1002 LIBRESSL_VERSION_NUMBER < 0x20700000L)
1003 SSL_load_error_strings();
1004 SSL_library_init();
1005 #ifndef OPENSSL_NO_SHA256
1006 EVP_add_digest(EVP_sha256());
1007 #endif /* OPENSSL_NO_SHA256 */
1008 /* TODO: if /dev/urandom is available, PRNG is seeded
1009 * automatically. If this is not the case, random data should
1010 * be added here. */
1011
1012 #ifdef PKCS12_FUNCS
1013 #ifndef OPENSSL_NO_RC2
1014 /*
1015 * 40-bit RC2 is commonly used in PKCS#12 files, so enable it.
1016 * This is enabled by PKCS12_PBE_add() in OpenSSL 0.9.8
1017 * versions, but it looks like OpenSSL 1.0.0 does not do that
1018 * anymore.
1019 */
1020 EVP_add_cipher(EVP_rc2_40_cbc());
1021 #endif /* OPENSSL_NO_RC2 */
1022 PKCS12_PBE_add();
1023 #endif /* PKCS12_FUNCS */
1024 #endif /* < 1.1.0 */
1025 } else {
1026 context = tls_context_new(conf);
1027 if (context == NULL)
1028 return NULL;
1029 }
1030 tls_openssl_ref_count++;
1031
1032 data = os_zalloc(sizeof(*data));
1033 if (data)
1034 ssl = SSL_CTX_new(SSLv23_method());
1035 else
1036 ssl = NULL;
1037 if (ssl == NULL) {
1038 tls_openssl_ref_count--;
1039 if (context != tls_global)
1040 os_free(context);
1041 if (tls_openssl_ref_count == 0) {
1042 os_free(tls_global);
1043 tls_global = NULL;
1044 }
1045 os_free(data);
1046 return NULL;
1047 }
1048 data->ssl = ssl;
1049 if (conf) {
1050 data->tls_session_lifetime = conf->tls_session_lifetime;
1051 data->crl_reload_interval = conf->crl_reload_interval;
1052 }
1053
1054 SSL_CTX_set_options(ssl, SSL_OP_NO_SSLv2);
1055 SSL_CTX_set_options(ssl, SSL_OP_NO_SSLv3);
1056
1057 SSL_CTX_set_mode(ssl, SSL_MODE_AUTO_RETRY);
1058
1059 #ifdef SSL_MODE_NO_AUTO_CHAIN
1060 /* Number of deployed use cases assume the default OpenSSL behavior of
1061 * auto chaining the local certificate is in use. BoringSSL removed this
1062 * functionality by default, so we need to restore it here to avoid
1063 * breaking existing use cases. */
1064 SSL_CTX_clear_mode(ssl, SSL_MODE_NO_AUTO_CHAIN);
1065 #endif /* SSL_MODE_NO_AUTO_CHAIN */
1066
1067 SSL_CTX_set_info_callback(ssl, ssl_info_cb);
1068 SSL_CTX_set_app_data(ssl, context);
1069 if (data->tls_session_lifetime > 0) {
1070 SSL_CTX_set_quiet_shutdown(ssl, 1);
1071 /*
1072 * Set default context here. In practice, this will be replaced
1073 * by the per-EAP method context in tls_connection_set_verify().
1074 */
1075 SSL_CTX_set_session_id_context(ssl, (u8 *) "hostapd", 7);
1076 SSL_CTX_set_session_cache_mode(ssl, SSL_SESS_CACHE_SERVER);
1077 SSL_CTX_set_timeout(ssl, data->tls_session_lifetime);
1078 SSL_CTX_sess_set_remove_cb(ssl, remove_session_cb);
1079 } else {
1080 SSL_CTX_set_session_cache_mode(ssl, SSL_SESS_CACHE_OFF);
1081 }
1082
1083 if (tls_ex_idx_session < 0) {
1084 tls_ex_idx_session = SSL_SESSION_get_ex_new_index(
1085 0, NULL, NULL, NULL, NULL);
1086 if (tls_ex_idx_session < 0) {
1087 tls_deinit(data);
1088 return NULL;
1089 }
1090 }
1091
1092 #ifndef OPENSSL_NO_ENGINE
1093 wpa_printf(MSG_DEBUG, "ENGINE: Loading builtin engines");
1094 ENGINE_load_builtin_engines();
1095
1096 if (conf &&
1097 (conf->opensc_engine_path || conf->pkcs11_engine_path ||
1098 conf->pkcs11_module_path)) {
1099 if (tls_engine_load_dynamic_opensc(conf->opensc_engine_path) ||
1100 tls_engine_load_dynamic_pkcs11(conf->pkcs11_engine_path,
1101 conf->pkcs11_module_path)) {
1102 tls_deinit(data);
1103 return NULL;
1104 }
1105 }
1106 #endif /* OPENSSL_NO_ENGINE */
1107
1108 if (conf && conf->openssl_ciphers)
1109 ciphers = conf->openssl_ciphers;
1110 else
1111 ciphers = TLS_DEFAULT_CIPHERS;
1112 if (SSL_CTX_set_cipher_list(ssl, ciphers) != 1) {
1113 wpa_printf(MSG_ERROR,
1114 "OpenSSL: Failed to set cipher string '%s'",
1115 ciphers);
1116 tls_deinit(data);
1117 return NULL;
1118 }
1119
1120 return data;
1121 }
1122
1123
tls_deinit(void * ssl_ctx)1124 void tls_deinit(void *ssl_ctx)
1125 {
1126 struct tls_data *data = ssl_ctx;
1127 SSL_CTX *ssl = data->ssl;
1128 struct tls_context *context = SSL_CTX_get_app_data(ssl);
1129 if (context != tls_global)
1130 os_free(context);
1131 if (data->tls_session_lifetime > 0)
1132 SSL_CTX_flush_sessions(ssl, 0);
1133 os_free(data->ca_cert);
1134 SSL_CTX_free(ssl);
1135
1136 tls_openssl_ref_count--;
1137 if (tls_openssl_ref_count == 0) {
1138 #if OPENSSL_VERSION_NUMBER < 0x10100000L || \
1139 (defined(LIBRESSL_VERSION_NUMBER) && \
1140 LIBRESSL_VERSION_NUMBER < 0x20700000L)
1141 #ifndef OPENSSL_NO_ENGINE
1142 ENGINE_cleanup();
1143 #endif /* OPENSSL_NO_ENGINE */
1144 CRYPTO_cleanup_all_ex_data();
1145 ERR_remove_thread_state(NULL);
1146 ERR_free_strings();
1147 EVP_cleanup();
1148 #endif /* < 1.1.0 */
1149 os_free(tls_global->ocsp_stapling_response);
1150 tls_global->ocsp_stapling_response = NULL;
1151 os_free(tls_global);
1152 tls_global = NULL;
1153 }
1154
1155 os_free(data->check_cert_subject);
1156 os_free(data);
1157 }
1158
1159
1160 #ifndef OPENSSL_NO_ENGINE
1161
1162 /* Cryptoki return values */
1163 #define CKR_PIN_INCORRECT 0x000000a0
1164 #define CKR_PIN_INVALID 0x000000a1
1165 #define CKR_PIN_LEN_RANGE 0x000000a2
1166
1167 /* libp11 */
1168 #define ERR_LIB_PKCS11 ERR_LIB_USER
1169
tls_is_pin_error(unsigned int err)1170 static int tls_is_pin_error(unsigned int err)
1171 {
1172 return ERR_GET_LIB(err) == ERR_LIB_PKCS11 &&
1173 (ERR_GET_REASON(err) == CKR_PIN_INCORRECT ||
1174 ERR_GET_REASON(err) == CKR_PIN_INVALID ||
1175 ERR_GET_REASON(err) == CKR_PIN_LEN_RANGE);
1176 }
1177
1178 #endif /* OPENSSL_NO_ENGINE */
1179
1180
1181 #ifdef ANDROID
1182 /* EVP_PKEY_from_keystore comes from system/security/keystore-engine. */
1183 EVP_PKEY * EVP_PKEY_from_keystore(const char *key_id);
1184 #endif /* ANDROID */
1185
tls_engine_init(struct tls_connection * conn,const char * engine_id,const char * pin,const char * key_id,const char * cert_id,const char * ca_cert_id)1186 static int tls_engine_init(struct tls_connection *conn, const char *engine_id,
1187 const char *pin, const char *key_id,
1188 const char *cert_id, const char *ca_cert_id)
1189 {
1190 #if defined(ANDROID) && defined(OPENSSL_IS_BORINGSSL)
1191 #if !defined(OPENSSL_NO_ENGINE)
1192 #error "This code depends on OPENSSL_NO_ENGINE being defined by BoringSSL."
1193 #endif
1194 if (!key_id)
1195 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
1196 conn->engine = NULL;
1197 conn->private_key = EVP_PKEY_from_keystore(key_id);
1198 if (!conn->private_key) {
1199 wpa_printf(MSG_ERROR,
1200 "ENGINE: cannot load private key with id '%s' [%s]",
1201 key_id,
1202 ERR_error_string(ERR_get_error(), NULL));
1203 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
1204 }
1205 #endif /* ANDROID && OPENSSL_IS_BORINGSSL */
1206
1207 #ifndef OPENSSL_NO_ENGINE
1208 int ret = -1;
1209 if (engine_id == NULL) {
1210 wpa_printf(MSG_ERROR, "ENGINE: Engine ID not set");
1211 return -1;
1212 }
1213
1214 ERR_clear_error();
1215 #ifdef ANDROID
1216 ENGINE_load_dynamic();
1217 #endif
1218 conn->engine = ENGINE_by_id(engine_id);
1219 if (!conn->engine) {
1220 wpa_printf(MSG_ERROR, "ENGINE: engine %s not available [%s]",
1221 engine_id, ERR_error_string(ERR_get_error(), NULL));
1222 goto err;
1223 }
1224 if (ENGINE_init(conn->engine) != 1) {
1225 wpa_printf(MSG_ERROR, "ENGINE: engine init failed "
1226 "(engine: %s) [%s]", engine_id,
1227 ERR_error_string(ERR_get_error(), NULL));
1228 goto err;
1229 }
1230 wpa_printf(MSG_DEBUG, "ENGINE: engine initialized");
1231
1232 #ifndef ANDROID
1233 if (pin && ENGINE_ctrl_cmd_string(conn->engine, "PIN", pin, 0) == 0) {
1234 wpa_printf(MSG_ERROR, "ENGINE: cannot set pin [%s]",
1235 ERR_error_string(ERR_get_error(), NULL));
1236 goto err;
1237 }
1238 #endif
1239 if (key_id) {
1240 /*
1241 * Ensure that the ENGINE does not attempt to use the OpenSSL
1242 * UI system to obtain a PIN, if we didn't provide one.
1243 */
1244 struct {
1245 const void *password;
1246 const char *prompt_info;
1247 } key_cb = { "", NULL };
1248
1249 /* load private key first in-case PIN is required for cert */
1250 conn->private_key = ENGINE_load_private_key(conn->engine,
1251 key_id, NULL,
1252 &key_cb);
1253 if (!conn->private_key) {
1254 unsigned long err = ERR_get_error();
1255
1256 wpa_printf(MSG_ERROR,
1257 "ENGINE: cannot load private key with id '%s' [%s]",
1258 key_id,
1259 ERR_error_string(err, NULL));
1260 if (tls_is_pin_error(err))
1261 ret = TLS_SET_PARAMS_ENGINE_PRV_BAD_PIN;
1262 else
1263 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
1264 goto err;
1265 }
1266 }
1267
1268 /* handle a certificate and/or CA certificate */
1269 if (cert_id || ca_cert_id) {
1270 const char *cmd_name = "LOAD_CERT_CTRL";
1271
1272 /* test if the engine supports a LOAD_CERT_CTRL */
1273 if (!ENGINE_ctrl(conn->engine, ENGINE_CTRL_GET_CMD_FROM_NAME,
1274 0, (void *)cmd_name, NULL)) {
1275 wpa_printf(MSG_ERROR, "ENGINE: engine does not support"
1276 " loading certificates");
1277 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
1278 goto err;
1279 }
1280 }
1281
1282 return 0;
1283
1284 err:
1285 if (conn->engine) {
1286 ENGINE_free(conn->engine);
1287 conn->engine = NULL;
1288 }
1289
1290 if (conn->private_key) {
1291 EVP_PKEY_free(conn->private_key);
1292 conn->private_key = NULL;
1293 }
1294
1295 return ret;
1296 #else /* OPENSSL_NO_ENGINE */
1297 return 0;
1298 #endif /* OPENSSL_NO_ENGINE */
1299 }
1300
1301
tls_engine_deinit(struct tls_connection * conn)1302 static void tls_engine_deinit(struct tls_connection *conn)
1303 {
1304 #if defined(ANDROID) || !defined(OPENSSL_NO_ENGINE)
1305 wpa_printf(MSG_DEBUG, "ENGINE: engine deinit");
1306 if (conn->private_key) {
1307 EVP_PKEY_free(conn->private_key);
1308 conn->private_key = NULL;
1309 }
1310 if (conn->engine) {
1311 #if !defined(OPENSSL_IS_BORINGSSL)
1312 ENGINE_finish(conn->engine);
1313 #endif /* !OPENSSL_IS_BORINGSSL */
1314 conn->engine = NULL;
1315 }
1316 #endif /* ANDROID || !OPENSSL_NO_ENGINE */
1317 }
1318
1319
tls_get_errors(void * ssl_ctx)1320 int tls_get_errors(void *ssl_ctx)
1321 {
1322 int count = 0;
1323 unsigned long err;
1324
1325 while ((err = ERR_get_error())) {
1326 wpa_printf(MSG_INFO, "TLS - SSL error: %s",
1327 ERR_error_string(err, NULL));
1328 count++;
1329 }
1330
1331 return count;
1332 }
1333
1334
openssl_content_type(int content_type)1335 static const char * openssl_content_type(int content_type)
1336 {
1337 switch (content_type) {
1338 case 20:
1339 return "change cipher spec";
1340 case 21:
1341 return "alert";
1342 case 22:
1343 return "handshake";
1344 case 23:
1345 return "application data";
1346 case 24:
1347 return "heartbeat";
1348 case 256:
1349 return "TLS header info"; /* pseudo content type */
1350 case 257:
1351 return "inner content type"; /* pseudo content type */
1352 default:
1353 return "?";
1354 }
1355 }
1356
1357
openssl_handshake_type(int content_type,const u8 * buf,size_t len)1358 static const char * openssl_handshake_type(int content_type, const u8 *buf,
1359 size_t len)
1360 {
1361 if (content_type == 257 && buf && len == 1)
1362 return openssl_content_type(buf[0]);
1363 if (content_type != 22 || !buf || len == 0)
1364 return "";
1365 switch (buf[0]) {
1366 case 0:
1367 return "hello request";
1368 case 1:
1369 return "client hello";
1370 case 2:
1371 return "server hello";
1372 case 3:
1373 return "hello verify request";
1374 case 4:
1375 return "new session ticket";
1376 case 5:
1377 return "end of early data";
1378 case 6:
1379 return "hello retry request";
1380 case 8:
1381 return "encrypted extensions";
1382 case 11:
1383 return "certificate";
1384 case 12:
1385 return "server key exchange";
1386 case 13:
1387 return "certificate request";
1388 case 14:
1389 return "server hello done";
1390 case 15:
1391 return "certificate verify";
1392 case 16:
1393 return "client key exchange";
1394 case 20:
1395 return "finished";
1396 case 21:
1397 return "certificate url";
1398 case 22:
1399 return "certificate status";
1400 case 23:
1401 return "supplemental data";
1402 case 24:
1403 return "key update";
1404 case 254:
1405 return "message hash";
1406 default:
1407 return "?";
1408 }
1409 }
1410
1411
1412 #ifdef CONFIG_SUITEB
1413
check_server_hello(struct tls_connection * conn,const u8 * pos,const u8 * end)1414 static void check_server_hello(struct tls_connection *conn,
1415 const u8 *pos, const u8 *end)
1416 {
1417 size_t payload_len, id_len;
1418
1419 /*
1420 * Parse ServerHello to get the selected cipher suite since OpenSSL does
1421 * not make it cleanly available during handshake and we need to know
1422 * whether DHE was selected.
1423 */
1424
1425 if (end - pos < 3)
1426 return;
1427 payload_len = WPA_GET_BE24(pos);
1428 pos += 3;
1429
1430 if ((size_t) (end - pos) < payload_len)
1431 return;
1432 end = pos + payload_len;
1433
1434 /* Skip Version and Random */
1435 if (end - pos < 2 + SSL3_RANDOM_SIZE)
1436 return;
1437 pos += 2 + SSL3_RANDOM_SIZE;
1438
1439 /* Skip Session ID */
1440 if (end - pos < 1)
1441 return;
1442 id_len = *pos++;
1443 if ((size_t) (end - pos) < id_len)
1444 return;
1445 pos += id_len;
1446
1447 if (end - pos < 2)
1448 return;
1449 conn->cipher_suite = WPA_GET_BE16(pos);
1450 wpa_printf(MSG_DEBUG, "OpenSSL: Server selected cipher suite 0x%x",
1451 conn->cipher_suite);
1452 }
1453
1454
check_server_key_exchange(SSL * ssl,struct tls_connection * conn,const u8 * pos,const u8 * end)1455 static void check_server_key_exchange(SSL *ssl, struct tls_connection *conn,
1456 const u8 *pos, const u8 *end)
1457 {
1458 size_t payload_len;
1459 u16 dh_len;
1460 BIGNUM *p;
1461 int bits;
1462
1463 if (!(conn->flags & TLS_CONN_SUITEB))
1464 return;
1465
1466 /* DHE is enabled only with DHE-RSA-AES256-GCM-SHA384 */
1467 if (conn->cipher_suite != 0x9f)
1468 return;
1469
1470 if (end - pos < 3)
1471 return;
1472 payload_len = WPA_GET_BE24(pos);
1473 pos += 3;
1474
1475 if ((size_t) (end - pos) < payload_len)
1476 return;
1477 end = pos + payload_len;
1478
1479 if (end - pos < 2)
1480 return;
1481 dh_len = WPA_GET_BE16(pos);
1482 pos += 2;
1483
1484 if ((size_t) (end - pos) < dh_len)
1485 return;
1486 p = BN_bin2bn(pos, dh_len, NULL);
1487 if (!p)
1488 return;
1489
1490 bits = BN_num_bits(p);
1491 BN_free(p);
1492
1493 conn->server_dh_prime_len = bits;
1494 wpa_printf(MSG_DEBUG, "OpenSSL: Server DH prime length: %d bits",
1495 conn->server_dh_prime_len);
1496 }
1497
1498 #endif /* CONFIG_SUITEB */
1499
1500
tls_msg_cb(int write_p,int version,int content_type,const void * buf,size_t len,SSL * ssl,void * arg)1501 static void tls_msg_cb(int write_p, int version, int content_type,
1502 const void *buf, size_t len, SSL *ssl, void *arg)
1503 {
1504 struct tls_connection *conn = arg;
1505 const u8 *pos = buf;
1506
1507 if (write_p == 2) {
1508 wpa_printf(MSG_DEBUG,
1509 "OpenSSL: session ver=0x%x content_type=%d",
1510 version, content_type);
1511 wpa_hexdump_key(MSG_MSGDUMP, "OpenSSL: Data", buf, len);
1512 return;
1513 }
1514
1515 wpa_printf(MSG_DEBUG, "OpenSSL: %s ver=0x%x content_type=%d (%s/%s)",
1516 write_p ? "TX" : "RX", version, content_type,
1517 openssl_content_type(content_type),
1518 openssl_handshake_type(content_type, buf, len));
1519 wpa_hexdump_key(MSG_MSGDUMP, "OpenSSL: Message", buf, len);
1520 if (content_type == 24 && len >= 3 && pos[0] == 1) {
1521 size_t payload_len = WPA_GET_BE16(pos + 1);
1522 if (payload_len + 3 > len) {
1523 wpa_printf(MSG_ERROR, "OpenSSL: Heartbeat attack detected");
1524 conn->invalid_hb_used = 1;
1525 }
1526 }
1527
1528 #ifdef CONFIG_SUITEB
1529 /*
1530 * Need to parse these handshake messages to be able to check DH prime
1531 * length since OpenSSL does not expose the new cipher suite and DH
1532 * parameters during handshake (e.g., for cert_cb() callback).
1533 */
1534 if (content_type == 22 && pos && len > 0 && pos[0] == 2)
1535 check_server_hello(conn, pos + 1, pos + len);
1536 if (content_type == 22 && pos && len > 0 && pos[0] == 12)
1537 check_server_key_exchange(ssl, conn, pos + 1, pos + len);
1538 #endif /* CONFIG_SUITEB */
1539 }
1540
1541
tls_connection_init(void * ssl_ctx)1542 struct tls_connection * tls_connection_init(void *ssl_ctx)
1543 {
1544 struct tls_data *data = ssl_ctx;
1545 SSL_CTX *ssl = data->ssl;
1546 struct tls_connection *conn;
1547 long options;
1548 X509_STORE *new_cert_store;
1549 struct os_reltime now;
1550 struct tls_context *context = SSL_CTX_get_app_data(ssl);
1551
1552 /* Replace X509 store if it is time to update CRL. */
1553 if (data->crl_reload_interval > 0 && os_get_reltime(&now) == 0 &&
1554 os_reltime_expired(&now, &data->crl_last_reload,
1555 data->crl_reload_interval)) {
1556 wpa_printf(MSG_INFO,
1557 "OpenSSL: Flushing X509 store with ca_cert file");
1558 new_cert_store = tls_crl_cert_reload(data->ca_cert,
1559 data->check_crl);
1560 if (!new_cert_store) {
1561 wpa_printf(MSG_ERROR,
1562 "OpenSSL: Error replacing X509 store with ca_cert file");
1563 } else {
1564 /* Replace old store */
1565 SSL_CTX_set_cert_store(ssl, new_cert_store);
1566 data->crl_last_reload = now;
1567 }
1568 }
1569
1570 conn = os_zalloc(sizeof(*conn));
1571 if (conn == NULL)
1572 return NULL;
1573 conn->data = data;
1574 conn->ssl_ctx = ssl;
1575 conn->ssl = SSL_new(ssl);
1576 if (conn->ssl == NULL) {
1577 tls_show_errors(MSG_INFO, __func__,
1578 "Failed to initialize new SSL connection");
1579 os_free(conn);
1580 return NULL;
1581 }
1582
1583 conn->context = context;
1584 SSL_set_app_data(conn->ssl, conn);
1585 SSL_set_msg_callback(conn->ssl, tls_msg_cb);
1586 SSL_set_msg_callback_arg(conn->ssl, conn);
1587 options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 |
1588 SSL_OP_SINGLE_DH_USE;
1589 #ifdef SSL_OP_NO_COMPRESSION
1590 options |= SSL_OP_NO_COMPRESSION;
1591 #endif /* SSL_OP_NO_COMPRESSION */
1592 SSL_set_options(conn->ssl, options);
1593 #ifdef SSL_OP_ENABLE_MIDDLEBOX_COMPAT
1594 /* Hopefully there is no need for middlebox compatibility mechanisms
1595 * when going through EAP authentication. */
1596 SSL_clear_options(conn->ssl, SSL_OP_ENABLE_MIDDLEBOX_COMPAT);
1597 #endif
1598
1599 conn->ssl_in = BIO_new(BIO_s_mem());
1600 if (!conn->ssl_in) {
1601 tls_show_errors(MSG_INFO, __func__,
1602 "Failed to create a new BIO for ssl_in");
1603 SSL_free(conn->ssl);
1604 os_free(conn);
1605 return NULL;
1606 }
1607
1608 conn->ssl_out = BIO_new(BIO_s_mem());
1609 if (!conn->ssl_out) {
1610 tls_show_errors(MSG_INFO, __func__,
1611 "Failed to create a new BIO for ssl_out");
1612 SSL_free(conn->ssl);
1613 BIO_free(conn->ssl_in);
1614 os_free(conn);
1615 return NULL;
1616 }
1617
1618 SSL_set_bio(conn->ssl, conn->ssl_in, conn->ssl_out);
1619
1620 return conn;
1621 }
1622
1623
tls_connection_deinit(void * ssl_ctx,struct tls_connection * conn)1624 void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn)
1625 {
1626 if (conn == NULL)
1627 return;
1628 if (conn->success_data) {
1629 /*
1630 * Make sure ssl_clear_bad_session() does not remove this
1631 * session.
1632 */
1633 SSL_set_quiet_shutdown(conn->ssl, 1);
1634 SSL_shutdown(conn->ssl);
1635 }
1636 SSL_free(conn->ssl);
1637 tls_engine_deinit(conn);
1638 os_free(conn->subject_match);
1639 os_free(conn->altsubject_match);
1640 os_free(conn->suffix_match);
1641 os_free(conn->domain_match);
1642 os_free(conn->check_cert_subject);
1643 os_free(conn->session_ticket);
1644 os_free(conn->peer_subject);
1645 os_free(conn);
1646 }
1647
1648
tls_connection_established(void * ssl_ctx,struct tls_connection * conn)1649 int tls_connection_established(void *ssl_ctx, struct tls_connection *conn)
1650 {
1651 return conn ? SSL_is_init_finished(conn->ssl) : 0;
1652 }
1653
1654
tls_connection_peer_serial_num(void * tls_ctx,struct tls_connection * conn)1655 char * tls_connection_peer_serial_num(void *tls_ctx,
1656 struct tls_connection *conn)
1657 {
1658 ASN1_INTEGER *ser;
1659 char *serial_num;
1660 size_t len;
1661
1662 if (!conn->peer_cert)
1663 return NULL;
1664
1665 ser = X509_get_serialNumber(conn->peer_cert);
1666 if (!ser)
1667 return NULL;
1668
1669 len = ASN1_STRING_length(ser) * 2 + 1;
1670 serial_num = os_malloc(len);
1671 if (!serial_num)
1672 return NULL;
1673 wpa_snprintf_hex_uppercase(serial_num, len,
1674 ASN1_STRING_get0_data(ser),
1675 ASN1_STRING_length(ser));
1676 return serial_num;
1677 }
1678
1679
tls_connection_shutdown(void * ssl_ctx,struct tls_connection * conn)1680 int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn)
1681 {
1682 if (conn == NULL)
1683 return -1;
1684
1685 /* Shutdown previous TLS connection without notifying the peer
1686 * because the connection was already terminated in practice
1687 * and "close notify" shutdown alert would confuse AS. */
1688 SSL_set_quiet_shutdown(conn->ssl, 1);
1689 SSL_shutdown(conn->ssl);
1690 return SSL_clear(conn->ssl) == 1 ? 0 : -1;
1691 }
1692
1693
tls_match_altsubject_component(X509 * cert,int type,const char * value,size_t len)1694 static int tls_match_altsubject_component(X509 *cert, int type,
1695 const char *value, size_t len)
1696 {
1697 GENERAL_NAME *gen;
1698 void *ext;
1699 int found = 0;
1700 stack_index_t i;
1701
1702 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
1703
1704 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
1705 gen = sk_GENERAL_NAME_value(ext, i);
1706 if (gen->type != type)
1707 continue;
1708 if (os_strlen((char *) gen->d.ia5->data) == len &&
1709 os_memcmp(value, gen->d.ia5->data, len) == 0)
1710 found++;
1711 }
1712
1713 sk_GENERAL_NAME_pop_free(ext, GENERAL_NAME_free);
1714
1715 return found;
1716 }
1717
1718
tls_match_altsubject(X509 * cert,const char * match)1719 static int tls_match_altsubject(X509 *cert, const char *match)
1720 {
1721 int type;
1722 const char *pos, *end;
1723 size_t len;
1724
1725 pos = match;
1726 do {
1727 if (os_strncmp(pos, "EMAIL:", 6) == 0) {
1728 type = GEN_EMAIL;
1729 pos += 6;
1730 } else if (os_strncmp(pos, "DNS:", 4) == 0) {
1731 type = GEN_DNS;
1732 pos += 4;
1733 } else if (os_strncmp(pos, "URI:", 4) == 0) {
1734 type = GEN_URI;
1735 pos += 4;
1736 } else {
1737 wpa_printf(MSG_INFO, "TLS: Invalid altSubjectName "
1738 "match '%s'", pos);
1739 return 0;
1740 }
1741 end = os_strchr(pos, ';');
1742 while (end) {
1743 if (os_strncmp(end + 1, "EMAIL:", 6) == 0 ||
1744 os_strncmp(end + 1, "DNS:", 4) == 0 ||
1745 os_strncmp(end + 1, "URI:", 4) == 0)
1746 break;
1747 end = os_strchr(end + 1, ';');
1748 }
1749 if (end)
1750 len = end - pos;
1751 else
1752 len = os_strlen(pos);
1753 if (tls_match_altsubject_component(cert, type, pos, len) > 0)
1754 return 1;
1755 pos = end + 1;
1756 } while (end);
1757
1758 return 0;
1759 }
1760
1761
1762 #ifndef CONFIG_NATIVE_WINDOWS
domain_suffix_match(const u8 * val,size_t len,const char * match,size_t match_len,int full)1763 static int domain_suffix_match(const u8 *val, size_t len, const char *match,
1764 size_t match_len, int full)
1765 {
1766 size_t i;
1767
1768 /* Check for embedded nuls that could mess up suffix matching */
1769 for (i = 0; i < len; i++) {
1770 if (val[i] == '\0') {
1771 wpa_printf(MSG_DEBUG, "TLS: Embedded null in a string - reject");
1772 return 0;
1773 }
1774 }
1775
1776 if (match_len > len || (full && match_len != len))
1777 return 0;
1778
1779 if (os_strncasecmp((const char *) val + len - match_len, match,
1780 match_len) != 0)
1781 return 0; /* no match */
1782
1783 if (match_len == len)
1784 return 1; /* exact match */
1785
1786 if (val[len - match_len - 1] == '.')
1787 return 1; /* full label match completes suffix match */
1788
1789 wpa_printf(MSG_DEBUG, "TLS: Reject due to incomplete label match");
1790 return 0;
1791 }
1792 #endif /* CONFIG_NATIVE_WINDOWS */
1793
1794
1795 struct tls_dn_field_order_cnt {
1796 u8 cn;
1797 u8 c;
1798 u8 l;
1799 u8 st;
1800 u8 o;
1801 u8 ou;
1802 u8 email;
1803 };
1804
1805
get_dn_field_index(const struct tls_dn_field_order_cnt * dn_cnt,int nid)1806 static int get_dn_field_index(const struct tls_dn_field_order_cnt *dn_cnt,
1807 int nid)
1808 {
1809 switch (nid) {
1810 case NID_commonName:
1811 return dn_cnt->cn;
1812 case NID_countryName:
1813 return dn_cnt->c;
1814 case NID_localityName:
1815 return dn_cnt->l;
1816 case NID_stateOrProvinceName:
1817 return dn_cnt->st;
1818 case NID_organizationName:
1819 return dn_cnt->o;
1820 case NID_organizationalUnitName:
1821 return dn_cnt->ou;
1822 case NID_pkcs9_emailAddress:
1823 return dn_cnt->email;
1824 default:
1825 wpa_printf(MSG_ERROR,
1826 "TLS: Unknown NID '%d' in check_cert_subject",
1827 nid);
1828 return -1;
1829 }
1830 }
1831
1832
1833 /**
1834 * match_dn_field - Match configuration DN field against Certificate DN field
1835 * @cert: Certificate
1836 * @nid: NID of DN field
1837 * @field: Field name
1838 * @value DN field value which is passed from configuration
1839 * e.g., if configuration have C=US and this argument will point to US.
1840 * @dn_cnt: DN matching context
1841 * Returns: 1 on success and 0 on failure
1842 */
match_dn_field(const X509 * cert,int nid,const char * field,const char * value,const struct tls_dn_field_order_cnt * dn_cnt)1843 static int match_dn_field(const X509 *cert, int nid, const char *field,
1844 const char *value,
1845 const struct tls_dn_field_order_cnt *dn_cnt)
1846 {
1847 int i, ret = 0, len, config_dn_field_index, match_index = 0;
1848 X509_NAME *name;
1849
1850 len = os_strlen(value);
1851 name = X509_get_subject_name((X509 *) cert);
1852
1853 /* Assign incremented cnt for every field of DN to check DN field in
1854 * right order */
1855 config_dn_field_index = get_dn_field_index(dn_cnt, nid);
1856 if (config_dn_field_index < 0)
1857 return 0;
1858
1859 /* Fetch value based on NID */
1860 for (i = -1; (i = X509_NAME_get_index_by_NID(name, nid, i)) > -1;) {
1861 X509_NAME_ENTRY *e;
1862 ASN1_STRING *cn;
1863
1864 e = X509_NAME_get_entry(name, i);
1865 if (!e)
1866 continue;
1867
1868 cn = X509_NAME_ENTRY_get_data(e);
1869 if (!cn)
1870 continue;
1871
1872 match_index++;
1873
1874 /* check for more than one DN field with same name */
1875 if (match_index != config_dn_field_index)
1876 continue;
1877
1878 /* Check wildcard at the right end side */
1879 /* E.g., if OU=develop* mentioned in configuration, allow 'OU'
1880 * of the subject in the client certificate to start with
1881 * 'develop' */
1882 if (len > 0 && value[len - 1] == '*') {
1883 /* Compare actual certificate DN field value with
1884 * configuration DN field value up to the specified
1885 * length. */
1886 ret = ASN1_STRING_length(cn) >= len - 1 &&
1887 os_memcmp(ASN1_STRING_get0_data(cn), value,
1888 len - 1) == 0;
1889 } else {
1890 /* Compare actual certificate DN field value with
1891 * configuration DN field value */
1892 ret = ASN1_STRING_length(cn) == len &&
1893 os_memcmp(ASN1_STRING_get0_data(cn), value,
1894 len) == 0;
1895 }
1896 if (!ret) {
1897 wpa_printf(MSG_ERROR,
1898 "OpenSSL: Failed to match %s '%s' with certificate DN field value '%s'",
1899 field, value, ASN1_STRING_get0_data(cn));
1900 }
1901 break;
1902 }
1903
1904 return ret;
1905 }
1906
1907
1908 /**
1909 * get_value_from_field - Get value from DN field
1910 * @cert: Certificate
1911 * @field_str: DN field string which is passed from configuration file (e.g.,
1912 * C=US)
1913 * @dn_cnt: DN matching context
1914 * Returns: 1 on success and 0 on failure
1915 */
get_value_from_field(const X509 * cert,char * field_str,struct tls_dn_field_order_cnt * dn_cnt)1916 static int get_value_from_field(const X509 *cert, char *field_str,
1917 struct tls_dn_field_order_cnt *dn_cnt)
1918 {
1919 int nid;
1920 char *context = NULL, *name, *value;
1921
1922 if (os_strcmp(field_str, "*") == 0)
1923 return 1; /* wildcard matches everything */
1924
1925 name = str_token(field_str, "=", &context);
1926 if (!name)
1927 return 0;
1928
1929 /* Compare all configured DN fields and assign nid based on that to
1930 * fetch correct value from certificate subject */
1931 if (os_strcmp(name, "CN") == 0) {
1932 nid = NID_commonName;
1933 dn_cnt->cn++;
1934 } else if(os_strcmp(name, "C") == 0) {
1935 nid = NID_countryName;
1936 dn_cnt->c++;
1937 } else if (os_strcmp(name, "L") == 0) {
1938 nid = NID_localityName;
1939 dn_cnt->l++;
1940 } else if (os_strcmp(name, "ST") == 0) {
1941 nid = NID_stateOrProvinceName;
1942 dn_cnt->st++;
1943 } else if (os_strcmp(name, "O") == 0) {
1944 nid = NID_organizationName;
1945 dn_cnt->o++;
1946 } else if (os_strcmp(name, "OU") == 0) {
1947 nid = NID_organizationalUnitName;
1948 dn_cnt->ou++;
1949 } else if (os_strcmp(name, "emailAddress") == 0) {
1950 nid = NID_pkcs9_emailAddress;
1951 dn_cnt->email++;
1952 } else {
1953 wpa_printf(MSG_ERROR,
1954 "TLS: Unknown field '%s' in check_cert_subject", name);
1955 return 0;
1956 }
1957
1958 value = str_token(field_str, "=", &context);
1959 if (!value) {
1960 wpa_printf(MSG_ERROR,
1961 "TLS: Distinguished Name field '%s' value is not defined in check_cert_subject",
1962 name);
1963 return 0;
1964 }
1965
1966 return match_dn_field(cert, nid, name, value, dn_cnt);
1967 }
1968
1969
1970 /**
1971 * tls_match_dn_field - Match subject DN field with check_cert_subject
1972 * @cert: Certificate
1973 * @match: check_cert_subject string
1974 * Returns: Return 1 on success and 0 on failure
1975 */
tls_match_dn_field(X509 * cert,const char * match)1976 static int tls_match_dn_field(X509 *cert, const char *match)
1977 {
1978 const char *token, *last = NULL;
1979 char field[256];
1980 struct tls_dn_field_order_cnt dn_cnt;
1981
1982 os_memset(&dn_cnt, 0, sizeof(dn_cnt));
1983
1984 /* Maximum length of each DN field is 255 characters */
1985
1986 /* Process each '/' delimited field */
1987 while ((token = cstr_token(match, "/", &last))) {
1988 if (last - token >= (int) sizeof(field)) {
1989 wpa_printf(MSG_ERROR,
1990 "OpenSSL: Too long DN matching field value in '%s'",
1991 match);
1992 return 0;
1993 }
1994 os_memcpy(field, token, last - token);
1995 field[last - token] = '\0';
1996
1997 if (!get_value_from_field(cert, field, &dn_cnt)) {
1998 wpa_printf(MSG_DEBUG, "OpenSSL: No match for DN '%s'",
1999 field);
2000 return 0;
2001 }
2002 }
2003
2004 return 1;
2005 }
2006
2007
2008 #ifndef CONFIG_NATIVE_WINDOWS
tls_match_suffix_helper(X509 * cert,const char * match,size_t match_len,int full)2009 static int tls_match_suffix_helper(X509 *cert, const char *match,
2010 size_t match_len, int full)
2011 {
2012 GENERAL_NAME *gen;
2013 void *ext;
2014 int i;
2015 stack_index_t j;
2016 int dns_name = 0;
2017 X509_NAME *name;
2018
2019 wpa_printf(MSG_DEBUG, "TLS: Match domain against %s%s",
2020 full ? "": "suffix ", match);
2021
2022 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
2023
2024 for (j = 0; ext && j < sk_GENERAL_NAME_num(ext); j++) {
2025 gen = sk_GENERAL_NAME_value(ext, j);
2026 if (gen->type != GEN_DNS)
2027 continue;
2028 dns_name++;
2029 wpa_hexdump_ascii(MSG_DEBUG, "TLS: Certificate dNSName",
2030 gen->d.dNSName->data,
2031 gen->d.dNSName->length);
2032 if (domain_suffix_match(gen->d.dNSName->data,
2033 gen->d.dNSName->length,
2034 match, match_len, full) == 1) {
2035 wpa_printf(MSG_DEBUG, "TLS: %s in dNSName found",
2036 full ? "Match" : "Suffix match");
2037 sk_GENERAL_NAME_pop_free(ext, GENERAL_NAME_free);
2038 return 1;
2039 }
2040 }
2041 sk_GENERAL_NAME_pop_free(ext, GENERAL_NAME_free);
2042
2043 if (dns_name) {
2044 wpa_printf(MSG_DEBUG, "TLS: None of the dNSName(s) matched");
2045 return 0;
2046 }
2047
2048 name = X509_get_subject_name(cert);
2049 i = -1;
2050 for (;;) {
2051 X509_NAME_ENTRY *e;
2052 ASN1_STRING *cn;
2053
2054 i = X509_NAME_get_index_by_NID(name, NID_commonName, i);
2055 if (i == -1)
2056 break;
2057 e = X509_NAME_get_entry(name, i);
2058 if (e == NULL)
2059 continue;
2060 cn = X509_NAME_ENTRY_get_data(e);
2061 if (cn == NULL)
2062 continue;
2063 wpa_hexdump_ascii(MSG_DEBUG, "TLS: Certificate commonName",
2064 cn->data, cn->length);
2065 if (domain_suffix_match(cn->data, cn->length,
2066 match, match_len, full) == 1) {
2067 wpa_printf(MSG_DEBUG, "TLS: %s in commonName found",
2068 full ? "Match" : "Suffix match");
2069 return 1;
2070 }
2071 }
2072
2073 wpa_printf(MSG_DEBUG, "TLS: No CommonName %smatch found",
2074 full ? "": "suffix ");
2075 return 0;
2076 }
2077 #endif /* CONFIG_NATIVE_WINDOWS */
2078
2079
tls_match_suffix(X509 * cert,const char * match,int full)2080 static int tls_match_suffix(X509 *cert, const char *match, int full)
2081 {
2082 #ifdef CONFIG_NATIVE_WINDOWS
2083 /* wincrypt.h has conflicting X509_NAME definition */
2084 return -1;
2085 #else /* CONFIG_NATIVE_WINDOWS */
2086 const char *token, *last = NULL;
2087
2088 /* Process each match alternative separately until a match is found */
2089 while ((token = cstr_token(match, ";", &last))) {
2090 if (tls_match_suffix_helper(cert, token, last - token, full))
2091 return 1;
2092 }
2093
2094 return 0;
2095 #endif /* CONFIG_NATIVE_WINDOWS */
2096 }
2097
2098
openssl_tls_fail_reason(int err)2099 static enum tls_fail_reason openssl_tls_fail_reason(int err)
2100 {
2101 switch (err) {
2102 case X509_V_ERR_CERT_REVOKED:
2103 return TLS_FAIL_REVOKED;
2104 case X509_V_ERR_CERT_NOT_YET_VALID:
2105 case X509_V_ERR_CRL_NOT_YET_VALID:
2106 return TLS_FAIL_NOT_YET_VALID;
2107 case X509_V_ERR_CERT_HAS_EXPIRED:
2108 case X509_V_ERR_CRL_HAS_EXPIRED:
2109 return TLS_FAIL_EXPIRED;
2110 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
2111 case X509_V_ERR_UNABLE_TO_GET_CRL:
2112 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
2113 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
2114 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
2115 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
2116 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
2117 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
2118 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
2119 case X509_V_ERR_INVALID_CA:
2120 return TLS_FAIL_UNTRUSTED;
2121 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
2122 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
2123 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
2124 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
2125 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
2126 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
2127 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
2128 case X509_V_ERR_CERT_UNTRUSTED:
2129 case X509_V_ERR_CERT_REJECTED:
2130 return TLS_FAIL_BAD_CERTIFICATE;
2131 default:
2132 return TLS_FAIL_UNSPECIFIED;
2133 }
2134 }
2135
2136
get_x509_cert(X509 * cert)2137 static struct wpabuf * get_x509_cert(X509 *cert)
2138 {
2139 struct wpabuf *buf;
2140 u8 *tmp;
2141
2142 int cert_len = i2d_X509(cert, NULL);
2143 if (cert_len <= 0)
2144 return NULL;
2145
2146 buf = wpabuf_alloc(cert_len);
2147 if (buf == NULL)
2148 return NULL;
2149
2150 tmp = wpabuf_put(buf, cert_len);
2151 i2d_X509(cert, &tmp);
2152 return buf;
2153 }
2154
2155
openssl_tls_fail_event(struct tls_connection * conn,X509 * err_cert,int err,int depth,const char * subject,const char * err_str,enum tls_fail_reason reason)2156 static void openssl_tls_fail_event(struct tls_connection *conn,
2157 X509 *err_cert, int err, int depth,
2158 const char *subject, const char *err_str,
2159 enum tls_fail_reason reason)
2160 {
2161 union tls_event_data ev;
2162 struct wpabuf *cert = NULL;
2163 struct tls_context *context = conn->context;
2164
2165 if (context->event_cb == NULL)
2166 return;
2167
2168 cert = get_x509_cert(err_cert);
2169 os_memset(&ev, 0, sizeof(ev));
2170 ev.cert_fail.reason = reason != TLS_FAIL_UNSPECIFIED ?
2171 reason : openssl_tls_fail_reason(err);
2172 ev.cert_fail.depth = depth;
2173 ev.cert_fail.subject = subject;
2174 ev.cert_fail.reason_txt = err_str;
2175 ev.cert_fail.cert = cert;
2176 context->event_cb(context->cb_ctx, TLS_CERT_CHAIN_FAILURE, &ev);
2177 wpabuf_free(cert);
2178 }
2179
2180
openssl_cert_tod(X509 * cert)2181 static int openssl_cert_tod(X509 *cert)
2182 {
2183 CERTIFICATEPOLICIES *ext;
2184 stack_index_t i;
2185 char buf[100];
2186 int res;
2187 int tod = 0;
2188
2189 ext = X509_get_ext_d2i(cert, NID_certificate_policies, NULL, NULL);
2190 if (!ext)
2191 return 0;
2192
2193 for (i = 0; i < sk_POLICYINFO_num(ext); i++) {
2194 POLICYINFO *policy;
2195
2196 policy = sk_POLICYINFO_value(ext, i);
2197 res = OBJ_obj2txt(buf, sizeof(buf), policy->policyid, 0);
2198 if (res < 0 || (size_t) res >= sizeof(buf))
2199 continue;
2200 wpa_printf(MSG_DEBUG, "OpenSSL: Certificate Policy %s", buf);
2201 if (os_strcmp(buf, "1.3.6.1.4.1.40808.1.3.1") == 0)
2202 tod = 1; /* TOD-STRICT */
2203 else if (os_strcmp(buf, "1.3.6.1.4.1.40808.1.3.2") == 0 && !tod)
2204 tod = 2; /* TOD-TOFU */
2205 }
2206 sk_POLICYINFO_pop_free(ext, POLICYINFO_free);
2207
2208 return tod;
2209 }
2210
2211
openssl_tls_cert_event(struct tls_connection * conn,X509 * err_cert,int depth,const char * subject)2212 static void openssl_tls_cert_event(struct tls_connection *conn,
2213 X509 *err_cert, int depth,
2214 const char *subject)
2215 {
2216 struct wpabuf *cert = NULL;
2217 union tls_event_data ev;
2218 struct tls_context *context = conn->context;
2219 char *altsubject[TLS_MAX_ALT_SUBJECT];
2220 int alt, num_altsubject = 0;
2221 GENERAL_NAME *gen;
2222 void *ext;
2223 stack_index_t i;
2224 ASN1_INTEGER *ser;
2225 char serial_num[128];
2226 #ifdef CONFIG_SHA256
2227 u8 hash[32];
2228 #endif /* CONFIG_SHA256 */
2229
2230 if (context->event_cb == NULL)
2231 return;
2232
2233 os_memset(&ev, 0, sizeof(ev));
2234 if (conn->cert_probe || (conn->flags & TLS_CONN_EXT_CERT_CHECK) ||
2235 context->cert_in_cb) {
2236 cert = get_x509_cert(err_cert);
2237 ev.peer_cert.cert = cert;
2238 }
2239 #ifdef CONFIG_SHA256
2240 if (cert) {
2241 const u8 *addr[1];
2242 size_t len[1];
2243 addr[0] = wpabuf_head(cert);
2244 len[0] = wpabuf_len(cert);
2245 if (sha256_vector(1, addr, len, hash) == 0) {
2246 ev.peer_cert.hash = hash;
2247 ev.peer_cert.hash_len = sizeof(hash);
2248 }
2249 }
2250 #endif /* CONFIG_SHA256 */
2251 ev.peer_cert.depth = depth;
2252 ev.peer_cert.subject = subject;
2253
2254 ser = X509_get_serialNumber(err_cert);
2255 if (ser) {
2256 wpa_snprintf_hex_uppercase(serial_num, sizeof(serial_num),
2257 ASN1_STRING_get0_data(ser),
2258 ASN1_STRING_length(ser));
2259 ev.peer_cert.serial_num = serial_num;
2260 }
2261
2262 ext = X509_get_ext_d2i(err_cert, NID_subject_alt_name, NULL, NULL);
2263 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
2264 char *pos;
2265
2266 if (num_altsubject == TLS_MAX_ALT_SUBJECT)
2267 break;
2268 gen = sk_GENERAL_NAME_value(ext, i);
2269 if (gen->type != GEN_EMAIL &&
2270 gen->type != GEN_DNS &&
2271 gen->type != GEN_URI)
2272 continue;
2273
2274 pos = os_malloc(10 + gen->d.ia5->length + 1);
2275 if (pos == NULL)
2276 break;
2277 altsubject[num_altsubject++] = pos;
2278
2279 switch (gen->type) {
2280 case GEN_EMAIL:
2281 os_memcpy(pos, "EMAIL:", 6);
2282 pos += 6;
2283 break;
2284 case GEN_DNS:
2285 os_memcpy(pos, "DNS:", 4);
2286 pos += 4;
2287 break;
2288 case GEN_URI:
2289 os_memcpy(pos, "URI:", 4);
2290 pos += 4;
2291 break;
2292 }
2293
2294 os_memcpy(pos, gen->d.ia5->data, gen->d.ia5->length);
2295 pos += gen->d.ia5->length;
2296 *pos = '\0';
2297 }
2298 sk_GENERAL_NAME_pop_free(ext, GENERAL_NAME_free);
2299
2300 for (alt = 0; alt < num_altsubject; alt++)
2301 ev.peer_cert.altsubject[alt] = altsubject[alt];
2302 ev.peer_cert.num_altsubject = num_altsubject;
2303
2304 ev.peer_cert.tod = openssl_cert_tod(err_cert);
2305
2306 context->event_cb(context->cb_ctx, TLS_PEER_CERTIFICATE, &ev);
2307 wpabuf_free(cert);
2308 for (alt = 0; alt < num_altsubject; alt++)
2309 os_free(altsubject[alt]);
2310 }
2311
2312
debug_print_cert(X509 * cert,const char * title)2313 static void debug_print_cert(X509 *cert, const char *title)
2314 {
2315 #ifndef CONFIG_NO_STDOUT_DEBUG
2316 BIO *out;
2317 size_t rlen;
2318 char *txt;
2319 int res;
2320
2321 if (wpa_debug_level > MSG_DEBUG)
2322 return;
2323
2324 out = BIO_new(BIO_s_mem());
2325 if (!out)
2326 return;
2327
2328 X509_print(out, cert);
2329 rlen = BIO_ctrl_pending(out);
2330 txt = os_malloc(rlen + 1);
2331 if (txt) {
2332 res = BIO_read(out, txt, rlen);
2333 if (res > 0) {
2334 txt[res] = '\0';
2335 wpa_printf(MSG_DEBUG, "OpenSSL: %s\n%s", title, txt);
2336 }
2337 os_free(txt);
2338 }
2339
2340 BIO_free(out);
2341 #endif /* CONFIG_NO_STDOUT_DEBUG */
2342 }
2343
2344
tls_verify_cb(int preverify_ok,X509_STORE_CTX * x509_ctx)2345 static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
2346 {
2347 char buf[256];
2348 X509 *err_cert;
2349 int err, depth;
2350 SSL *ssl;
2351 struct tls_connection *conn;
2352 struct tls_context *context;
2353 char *match, *altmatch, *suffix_match, *domain_match;
2354 const char *check_cert_subject;
2355 const char *err_str;
2356
2357 err_cert = X509_STORE_CTX_get_current_cert(x509_ctx);
2358 if (!err_cert)
2359 return 0;
2360
2361 err = X509_STORE_CTX_get_error(x509_ctx);
2362 depth = X509_STORE_CTX_get_error_depth(x509_ctx);
2363 ssl = X509_STORE_CTX_get_ex_data(x509_ctx,
2364 SSL_get_ex_data_X509_STORE_CTX_idx());
2365 os_snprintf(buf, sizeof(buf), "Peer certificate - depth %d", depth);
2366 debug_print_cert(err_cert, buf);
2367 X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf));
2368
2369 conn = SSL_get_app_data(ssl);
2370 if (conn == NULL)
2371 return 0;
2372
2373 if (depth == 0)
2374 conn->peer_cert = err_cert;
2375 else if (depth == 1)
2376 conn->peer_issuer = err_cert;
2377 else if (depth == 2)
2378 conn->peer_issuer_issuer = err_cert;
2379
2380 context = conn->context;
2381 match = conn->subject_match;
2382 altmatch = conn->altsubject_match;
2383 suffix_match = conn->suffix_match;
2384 domain_match = conn->domain_match;
2385
2386 if (!preverify_ok && !conn->ca_cert_verify)
2387 preverify_ok = 1;
2388 if (!preverify_ok && depth > 0 && conn->server_cert_only)
2389 preverify_ok = 1;
2390 if (!preverify_ok && (conn->flags & TLS_CONN_DISABLE_TIME_CHECKS) &&
2391 (err == X509_V_ERR_CERT_HAS_EXPIRED ||
2392 err == X509_V_ERR_CERT_NOT_YET_VALID)) {
2393 wpa_printf(MSG_DEBUG, "OpenSSL: Ignore certificate validity "
2394 "time mismatch");
2395 preverify_ok = 1;
2396 }
2397 if (!preverify_ok && !conn->data->check_crl_strict &&
2398 (err == X509_V_ERR_CRL_HAS_EXPIRED ||
2399 err == X509_V_ERR_CRL_NOT_YET_VALID)) {
2400 wpa_printf(MSG_DEBUG,
2401 "OpenSSL: Ignore certificate validity CRL time mismatch");
2402 preverify_ok = 1;
2403 }
2404
2405 err_str = X509_verify_cert_error_string(err);
2406
2407 #ifdef CONFIG_SHA256
2408 /*
2409 * Do not require preverify_ok so we can explicity allow otherwise
2410 * invalid pinned server certificates.
2411 */
2412 if (depth == 0 && conn->server_cert_only) {
2413 struct wpabuf *cert;
2414 cert = get_x509_cert(err_cert);
2415 if (!cert) {
2416 wpa_printf(MSG_DEBUG, "OpenSSL: Could not fetch "
2417 "server certificate data");
2418 preverify_ok = 0;
2419 } else {
2420 u8 hash[32];
2421 const u8 *addr[1];
2422 size_t len[1];
2423 addr[0] = wpabuf_head(cert);
2424 len[0] = wpabuf_len(cert);
2425 if (sha256_vector(1, addr, len, hash) < 0 ||
2426 os_memcmp(conn->srv_cert_hash, hash, 32) != 0) {
2427 err_str = "Server certificate mismatch";
2428 err = X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN;
2429 preverify_ok = 0;
2430 } else if (!preverify_ok) {
2431 /*
2432 * Certificate matches pinned certificate, allow
2433 * regardless of other problems.
2434 */
2435 wpa_printf(MSG_DEBUG,
2436 "OpenSSL: Ignore validation issues for a pinned server certificate");
2437 preverify_ok = 1;
2438 }
2439 wpabuf_free(cert);
2440 }
2441 }
2442 #endif /* CONFIG_SHA256 */
2443
2444 openssl_tls_cert_event(conn, err_cert, depth, buf);
2445
2446 if (!preverify_ok) {
2447 if (depth > 0) {
2448 /* Send cert event for the peer certificate so that
2449 * the upper layers get information about it even if
2450 * validation of a CA certificate fails. */
2451 STACK_OF(X509) *chain;
2452
2453 chain = X509_STORE_CTX_get1_chain(x509_ctx);
2454 if (chain && sk_X509_num(chain) > 0) {
2455 char buf2[256];
2456 X509 *cert;
2457
2458 cert = sk_X509_value(chain, 0);
2459 X509_NAME_oneline(X509_get_subject_name(cert),
2460 buf2, sizeof(buf2));
2461
2462 openssl_tls_cert_event(conn, cert, 0, buf2);
2463 }
2464 if (chain)
2465 sk_X509_pop_free(chain, X509_free);
2466 }
2467
2468 wpa_printf(MSG_WARNING, "TLS: Certificate verification failed,"
2469 " error %d (%s) depth %d for '%s'", err, err_str,
2470 depth, buf);
2471 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
2472 err_str, TLS_FAIL_UNSPECIFIED);
2473 return preverify_ok;
2474 }
2475
2476 wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - preverify_ok=%d "
2477 "err=%d (%s) ca_cert_verify=%d depth=%d buf='%s'",
2478 preverify_ok, err, err_str,
2479 conn->ca_cert_verify, depth, buf);
2480 check_cert_subject = conn->check_cert_subject;
2481 if (!check_cert_subject)
2482 check_cert_subject = conn->data->check_cert_subject;
2483 if (check_cert_subject) {
2484 if (depth == 0 &&
2485 !tls_match_dn_field(err_cert, check_cert_subject)) {
2486 preverify_ok = 0;
2487 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
2488 "Distinguished Name",
2489 TLS_FAIL_DN_MISMATCH);
2490 }
2491 }
2492 if (depth == 0 && match && os_strstr(buf, match) == NULL) {
2493 wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not "
2494 "match with '%s'", buf, match);
2495 preverify_ok = 0;
2496 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
2497 "Subject mismatch",
2498 TLS_FAIL_SUBJECT_MISMATCH);
2499 } else if (depth == 0 && altmatch &&
2500 !tls_match_altsubject(err_cert, altmatch)) {
2501 wpa_printf(MSG_WARNING, "TLS: altSubjectName match "
2502 "'%s' not found", altmatch);
2503 preverify_ok = 0;
2504 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
2505 "AltSubject mismatch",
2506 TLS_FAIL_ALTSUBJECT_MISMATCH);
2507 } else if (depth == 0 && suffix_match &&
2508 !tls_match_suffix(err_cert, suffix_match, 0)) {
2509 wpa_printf(MSG_WARNING, "TLS: Domain suffix match '%s' not found",
2510 suffix_match);
2511 preverify_ok = 0;
2512 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
2513 "Domain suffix mismatch",
2514 TLS_FAIL_DOMAIN_SUFFIX_MISMATCH);
2515 } else if (depth == 0 && domain_match &&
2516 !tls_match_suffix(err_cert, domain_match, 1)) {
2517 wpa_printf(MSG_WARNING, "TLS: Domain match '%s' not found",
2518 domain_match);
2519 preverify_ok = 0;
2520 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
2521 "Domain mismatch",
2522 TLS_FAIL_DOMAIN_MISMATCH);
2523 }
2524
2525 if (conn->cert_probe && preverify_ok && depth == 0) {
2526 wpa_printf(MSG_DEBUG, "OpenSSL: Reject server certificate "
2527 "on probe-only run");
2528 preverify_ok = 0;
2529 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
2530 "Server certificate chain probe",
2531 TLS_FAIL_SERVER_CHAIN_PROBE);
2532 }
2533
2534 #ifdef CONFIG_SUITEB
2535 if (conn->flags & TLS_CONN_SUITEB) {
2536 EVP_PKEY *pk;
2537 RSA *rsa;
2538 int len = -1;
2539
2540 pk = X509_get_pubkey(err_cert);
2541 if (pk) {
2542 rsa = EVP_PKEY_get1_RSA(pk);
2543 if (rsa) {
2544 len = RSA_bits(rsa);
2545 RSA_free(rsa);
2546 }
2547 EVP_PKEY_free(pk);
2548 }
2549
2550 if (len >= 0) {
2551 wpa_printf(MSG_DEBUG,
2552 "OpenSSL: RSA modulus size: %d bits", len);
2553 if (len < 3072) {
2554 preverify_ok = 0;
2555 openssl_tls_fail_event(
2556 conn, err_cert, err,
2557 depth, buf,
2558 "Insufficient RSA modulus size",
2559 TLS_FAIL_INSUFFICIENT_KEY_LEN);
2560 }
2561 }
2562 }
2563 #endif /* CONFIG_SUITEB */
2564
2565 #ifdef OPENSSL_IS_BORINGSSL
2566 if (depth == 0 && (conn->flags & TLS_CONN_REQUEST_OCSP) &&
2567 preverify_ok) {
2568 enum ocsp_result res;
2569
2570 res = check_ocsp_resp(conn->ssl_ctx, conn->ssl, err_cert,
2571 conn->peer_issuer,
2572 conn->peer_issuer_issuer);
2573 if (res == OCSP_REVOKED) {
2574 preverify_ok = 0;
2575 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
2576 "certificate revoked",
2577 TLS_FAIL_REVOKED);
2578 if (err == X509_V_OK)
2579 X509_STORE_CTX_set_error(
2580 x509_ctx, X509_V_ERR_CERT_REVOKED);
2581 } else if (res != OCSP_GOOD &&
2582 (conn->flags & TLS_CONN_REQUIRE_OCSP)) {
2583 preverify_ok = 0;
2584 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
2585 "bad certificate status response",
2586 TLS_FAIL_UNSPECIFIED);
2587 }
2588 }
2589 #endif /* OPENSSL_IS_BORINGSSL */
2590
2591 if (depth == 0 && preverify_ok && context->event_cb != NULL)
2592 context->event_cb(context->cb_ctx,
2593 TLS_CERT_CHAIN_SUCCESS, NULL);
2594
2595 if (depth == 0 && preverify_ok) {
2596 os_free(conn->peer_subject);
2597 conn->peer_subject = os_strdup(buf);
2598 }
2599
2600 return preverify_ok;
2601 }
2602
2603
2604 #ifndef OPENSSL_NO_STDIO
tls_load_ca_der(struct tls_data * data,const char * ca_cert)2605 static int tls_load_ca_der(struct tls_data *data, const char *ca_cert)
2606 {
2607 SSL_CTX *ssl_ctx = data->ssl;
2608 X509_LOOKUP *lookup;
2609 int ret = 0;
2610
2611 lookup = X509_STORE_add_lookup(SSL_CTX_get_cert_store(ssl_ctx),
2612 X509_LOOKUP_file());
2613 if (lookup == NULL) {
2614 tls_show_errors(MSG_WARNING, __func__,
2615 "Failed add lookup for X509 store");
2616 return -1;
2617 }
2618
2619 if (!X509_LOOKUP_load_file(lookup, ca_cert, X509_FILETYPE_ASN1)) {
2620 unsigned long err = ERR_peek_error();
2621 tls_show_errors(MSG_WARNING, __func__,
2622 "Failed load CA in DER format");
2623 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
2624 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
2625 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
2626 "cert already in hash table error",
2627 __func__);
2628 } else
2629 ret = -1;
2630 }
2631
2632 return ret;
2633 }
2634 #endif /* OPENSSL_NO_STDIO */
2635
2636
tls_connection_ca_cert(struct tls_data * data,struct tls_connection * conn,const char * ca_cert,const u8 * ca_cert_blob,size_t ca_cert_blob_len,const char * ca_path)2637 static int tls_connection_ca_cert(struct tls_data *data,
2638 struct tls_connection *conn,
2639 const char *ca_cert, const u8 *ca_cert_blob,
2640 size_t ca_cert_blob_len, const char *ca_path)
2641 {
2642 SSL_CTX *ssl_ctx = data->ssl;
2643 X509_STORE *store;
2644
2645 /*
2646 * Remove previously configured trusted CA certificates before adding
2647 * new ones.
2648 */
2649 store = X509_STORE_new();
2650 if (store == NULL) {
2651 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
2652 "certificate store", __func__);
2653 return -1;
2654 }
2655 SSL_CTX_set_cert_store(ssl_ctx, store);
2656
2657 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
2658 conn->ca_cert_verify = 1;
2659
2660 if (ca_cert && os_strncmp(ca_cert, "probe://", 8) == 0) {
2661 wpa_printf(MSG_DEBUG, "OpenSSL: Probe for server certificate "
2662 "chain");
2663 conn->cert_probe = 1;
2664 conn->ca_cert_verify = 0;
2665 return 0;
2666 }
2667
2668 if (ca_cert && os_strncmp(ca_cert, "hash://", 7) == 0) {
2669 #ifdef CONFIG_SHA256
2670 const char *pos = ca_cert + 7;
2671 if (os_strncmp(pos, "server/sha256/", 14) != 0) {
2672 wpa_printf(MSG_DEBUG, "OpenSSL: Unsupported ca_cert "
2673 "hash value '%s'", ca_cert);
2674 return -1;
2675 }
2676 pos += 14;
2677 if (os_strlen(pos) != 32 * 2) {
2678 wpa_printf(MSG_DEBUG, "OpenSSL: Unexpected SHA256 "
2679 "hash length in ca_cert '%s'", ca_cert);
2680 return -1;
2681 }
2682 if (hexstr2bin(pos, conn->srv_cert_hash, 32) < 0) {
2683 wpa_printf(MSG_DEBUG, "OpenSSL: Invalid SHA256 hash "
2684 "value in ca_cert '%s'", ca_cert);
2685 return -1;
2686 }
2687 conn->server_cert_only = 1;
2688 wpa_printf(MSG_DEBUG, "OpenSSL: Checking only server "
2689 "certificate match");
2690 return 0;
2691 #else /* CONFIG_SHA256 */
2692 wpa_printf(MSG_INFO, "No SHA256 included in the build - "
2693 "cannot validate server certificate hash");
2694 return -1;
2695 #endif /* CONFIG_SHA256 */
2696 }
2697
2698 if (ca_cert_blob) {
2699 X509 *cert = d2i_X509(NULL,
2700 (const unsigned char **) &ca_cert_blob,
2701 ca_cert_blob_len);
2702 if (cert == NULL) {
2703 BIO *bio = BIO_new_mem_buf(ca_cert_blob,
2704 ca_cert_blob_len);
2705
2706 if (bio) {
2707 cert = PEM_read_bio_X509(bio, NULL, NULL, NULL);
2708 BIO_free(bio);
2709 }
2710
2711 if (!cert) {
2712 tls_show_errors(MSG_WARNING, __func__,
2713 "Failed to parse ca_cert_blob");
2714 return -1;
2715 }
2716
2717 while (ERR_get_error()) {
2718 /* Ignore errors from DER conversion. */
2719 }
2720 }
2721
2722 if (!X509_STORE_add_cert(SSL_CTX_get_cert_store(ssl_ctx),
2723 cert)) {
2724 unsigned long err = ERR_peek_error();
2725 tls_show_errors(MSG_WARNING, __func__,
2726 "Failed to add ca_cert_blob to "
2727 "certificate store");
2728 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
2729 ERR_GET_REASON(err) ==
2730 X509_R_CERT_ALREADY_IN_HASH_TABLE) {
2731 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
2732 "cert already in hash table error",
2733 __func__);
2734 } else {
2735 X509_free(cert);
2736 return -1;
2737 }
2738 }
2739 X509_free(cert);
2740 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob "
2741 "to certificate store", __func__);
2742 return 0;
2743 }
2744
2745 #ifdef ANDROID
2746 /* Single alias */
2747 if (ca_cert && os_strncmp("keystore://", ca_cert, 11) == 0) {
2748 if (tls_add_ca_from_keystore(SSL_CTX_get_cert_store(ssl_ctx),
2749 &ca_cert[11]) < 0)
2750 return -1;
2751 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
2752 return 0;
2753 }
2754
2755 /* Multiple aliases separated by space */
2756 if (ca_cert && os_strncmp("keystores://", ca_cert, 12) == 0) {
2757 char *aliases = os_strdup(&ca_cert[12]);
2758 const char *delim = " ";
2759 int rc = 0;
2760 char *savedptr;
2761 char *alias;
2762
2763 if (!aliases)
2764 return -1;
2765 alias = strtok_r(aliases, delim, &savedptr);
2766 for (; alias; alias = strtok_r(NULL, delim, &savedptr)) {
2767 if (tls_add_ca_from_keystore_encoded(
2768 SSL_CTX_get_cert_store(ssl_ctx), alias)) {
2769 wpa_printf(MSG_WARNING,
2770 "OpenSSL: %s - Failed to add ca_cert %s from keystore",
2771 __func__, alias);
2772 rc = -1;
2773 break;
2774 }
2775 }
2776 os_free(aliases);
2777 if (rc)
2778 return rc;
2779
2780 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
2781 return 0;
2782 }
2783 #endif /* ANDROID */
2784
2785 #ifdef CONFIG_NATIVE_WINDOWS
2786 if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) ==
2787 0) {
2788 wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from "
2789 "system certificate store");
2790 return 0;
2791 }
2792 #endif /* CONFIG_NATIVE_WINDOWS */
2793
2794 if (ca_cert || ca_path) {
2795 #ifndef OPENSSL_NO_STDIO
2796 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) !=
2797 1) {
2798 tls_show_errors(MSG_WARNING, __func__,
2799 "Failed to load root certificates");
2800 if (ca_cert &&
2801 tls_load_ca_der(data, ca_cert) == 0) {
2802 wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded "
2803 "DER format CA certificate",
2804 __func__);
2805 } else
2806 return -1;
2807 } else {
2808 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
2809 "certificate(s) loaded");
2810 tls_get_errors(data);
2811 }
2812 #else /* OPENSSL_NO_STDIO */
2813 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
2814 __func__);
2815 return -1;
2816 #endif /* OPENSSL_NO_STDIO */
2817 } else {
2818 /* No ca_cert configured - do not try to verify server
2819 * certificate */
2820 conn->ca_cert_verify = 0;
2821 }
2822
2823 return 0;
2824 }
2825
2826
tls_global_ca_cert(struct tls_data * data,const char * ca_cert)2827 static int tls_global_ca_cert(struct tls_data *data, const char *ca_cert)
2828 {
2829 SSL_CTX *ssl_ctx = data->ssl;
2830
2831 if (ca_cert) {
2832 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1)
2833 {
2834 tls_show_errors(MSG_WARNING, __func__,
2835 "Failed to load root certificates");
2836 return -1;
2837 }
2838
2839 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
2840 "certificate(s) loaded");
2841
2842 #ifndef OPENSSL_NO_STDIO
2843 /* Add the same CAs to the client certificate requests */
2844 SSL_CTX_set_client_CA_list(ssl_ctx,
2845 SSL_load_client_CA_file(ca_cert));
2846 #endif /* OPENSSL_NO_STDIO */
2847
2848 os_free(data->ca_cert);
2849 data->ca_cert = os_strdup(ca_cert);
2850 }
2851
2852 return 0;
2853 }
2854
2855
tls_global_set_verify(void * ssl_ctx,int check_crl,int strict)2856 int tls_global_set_verify(void *ssl_ctx, int check_crl, int strict)
2857 {
2858 int flags;
2859
2860 if (check_crl) {
2861 struct tls_data *data = ssl_ctx;
2862 X509_STORE *cs = SSL_CTX_get_cert_store(data->ssl);
2863 if (cs == NULL) {
2864 tls_show_errors(MSG_INFO, __func__, "Failed to get "
2865 "certificate store when enabling "
2866 "check_crl");
2867 return -1;
2868 }
2869 flags = X509_V_FLAG_CRL_CHECK;
2870 if (check_crl == 2)
2871 flags |= X509_V_FLAG_CRL_CHECK_ALL;
2872 X509_STORE_set_flags(cs, flags);
2873
2874 data->check_crl = check_crl;
2875 data->check_crl_strict = strict;
2876 os_get_reltime(&data->crl_last_reload);
2877 }
2878 return 0;
2879 }
2880
2881
tls_connection_set_subject_match(struct tls_connection * conn,const char * subject_match,const char * altsubject_match,const char * suffix_match,const char * domain_match,const char * check_cert_subject)2882 static int tls_connection_set_subject_match(struct tls_connection *conn,
2883 const char *subject_match,
2884 const char *altsubject_match,
2885 const char *suffix_match,
2886 const char *domain_match,
2887 const char *check_cert_subject)
2888 {
2889 os_free(conn->subject_match);
2890 conn->subject_match = NULL;
2891 if (subject_match) {
2892 conn->subject_match = os_strdup(subject_match);
2893 if (conn->subject_match == NULL)
2894 return -1;
2895 }
2896
2897 os_free(conn->altsubject_match);
2898 conn->altsubject_match = NULL;
2899 if (altsubject_match) {
2900 conn->altsubject_match = os_strdup(altsubject_match);
2901 if (conn->altsubject_match == NULL)
2902 return -1;
2903 }
2904
2905 os_free(conn->suffix_match);
2906 conn->suffix_match = NULL;
2907 if (suffix_match) {
2908 conn->suffix_match = os_strdup(suffix_match);
2909 if (conn->suffix_match == NULL)
2910 return -1;
2911 }
2912
2913 os_free(conn->domain_match);
2914 conn->domain_match = NULL;
2915 if (domain_match) {
2916 conn->domain_match = os_strdup(domain_match);
2917 if (conn->domain_match == NULL)
2918 return -1;
2919 }
2920
2921 os_free(conn->check_cert_subject);
2922 conn->check_cert_subject = NULL;
2923 if (check_cert_subject) {
2924 conn->check_cert_subject = os_strdup(check_cert_subject);
2925 if (!conn->check_cert_subject)
2926 return -1;
2927 }
2928
2929 return 0;
2930 }
2931
2932
2933 #ifdef CONFIG_SUITEB
2934 #if OPENSSL_VERSION_NUMBER >= 0x10002000L
suiteb_cert_cb(SSL * ssl,void * arg)2935 static int suiteb_cert_cb(SSL *ssl, void *arg)
2936 {
2937 struct tls_connection *conn = arg;
2938
2939 /*
2940 * This cert_cb() is not really the best location for doing a
2941 * constraint check for the ServerKeyExchange message, but this seems to
2942 * be the only place where the current OpenSSL sequence can be
2943 * terminated cleanly with an TLS alert going out to the server.
2944 */
2945
2946 if (!(conn->flags & TLS_CONN_SUITEB))
2947 return 1;
2948
2949 /* DHE is enabled only with DHE-RSA-AES256-GCM-SHA384 */
2950 if (conn->cipher_suite != 0x9f)
2951 return 1;
2952
2953 if (conn->server_dh_prime_len >= 3072)
2954 return 1;
2955
2956 wpa_printf(MSG_DEBUG,
2957 "OpenSSL: Server DH prime length (%d bits) not sufficient for Suite B RSA - reject handshake",
2958 conn->server_dh_prime_len);
2959 return 0;
2960 }
2961 #endif /* OPENSSL_VERSION_NUMBER */
2962 #endif /* CONFIG_SUITEB */
2963
2964
tls_set_conn_flags(struct tls_connection * conn,unsigned int flags,const char * openssl_ciphers)2965 static int tls_set_conn_flags(struct tls_connection *conn, unsigned int flags,
2966 const char *openssl_ciphers)
2967 {
2968 SSL *ssl = conn->ssl;
2969
2970 #ifdef SSL_OP_NO_TICKET
2971 if (flags & TLS_CONN_DISABLE_SESSION_TICKET)
2972 SSL_set_options(ssl, SSL_OP_NO_TICKET);
2973 else
2974 SSL_clear_options(ssl, SSL_OP_NO_TICKET);
2975 #endif /* SSL_OP_NO_TICKET */
2976
2977 #ifdef SSL_OP_NO_TLSv1
2978 if (flags & TLS_CONN_DISABLE_TLSv1_0)
2979 SSL_set_options(ssl, SSL_OP_NO_TLSv1);
2980 else
2981 SSL_clear_options(ssl, SSL_OP_NO_TLSv1);
2982 #endif /* SSL_OP_NO_TLSv1 */
2983 #ifdef SSL_OP_NO_TLSv1_1
2984 if (flags & TLS_CONN_DISABLE_TLSv1_1)
2985 SSL_set_options(ssl, SSL_OP_NO_TLSv1_1);
2986 else
2987 SSL_clear_options(ssl, SSL_OP_NO_TLSv1_1);
2988 #endif /* SSL_OP_NO_TLSv1_1 */
2989 #ifdef SSL_OP_NO_TLSv1_2
2990 if (flags & TLS_CONN_DISABLE_TLSv1_2)
2991 SSL_set_options(ssl, SSL_OP_NO_TLSv1_2);
2992 else
2993 SSL_clear_options(ssl, SSL_OP_NO_TLSv1_2);
2994 #endif /* SSL_OP_NO_TLSv1_2 */
2995 #ifdef SSL_OP_NO_TLSv1_3
2996 if (flags & TLS_CONN_DISABLE_TLSv1_3)
2997 SSL_set_options(ssl, SSL_OP_NO_TLSv1_3);
2998 else
2999 SSL_clear_options(ssl, SSL_OP_NO_TLSv1_3);
3000 #endif /* SSL_OP_NO_TLSv1_3 */
3001 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
3002 if (flags & (TLS_CONN_ENABLE_TLSv1_0 |
3003 TLS_CONN_ENABLE_TLSv1_1 |
3004 TLS_CONN_ENABLE_TLSv1_2)) {
3005 int version = 0;
3006
3007 /* Explicit request to enable TLS versions even if needing to
3008 * override systemwide policies. */
3009 if (flags & TLS_CONN_ENABLE_TLSv1_0)
3010 version = TLS1_VERSION;
3011 else if (flags & TLS_CONN_ENABLE_TLSv1_1)
3012 version = TLS1_1_VERSION;
3013 else if (flags & TLS_CONN_ENABLE_TLSv1_2)
3014 version = TLS1_2_VERSION;
3015 if (!version) {
3016 wpa_printf(MSG_DEBUG,
3017 "OpenSSL: Invalid TLS version configuration");
3018 return -1;
3019 }
3020
3021 if (SSL_set_min_proto_version(ssl, version) != 1) {
3022 wpa_printf(MSG_DEBUG,
3023 "OpenSSL: Failed to set minimum TLS version");
3024 return -1;
3025 }
3026 }
3027 #endif /* >= 1.1.0 */
3028 #if OPENSSL_VERSION_NUMBER >= 0x10100000L && \
3029 !defined(LIBRESSL_VERSION_NUMBER) && \
3030 !defined(OPENSSL_IS_BORINGSSL)
3031 {
3032 #if OPENSSL_VERSION_NUMBER >= 0x30000000L
3033 int need_level = 0;
3034 #else
3035 int need_level = 1;
3036 #endif
3037
3038 if ((flags &
3039 (TLS_CONN_ENABLE_TLSv1_0 | TLS_CONN_ENABLE_TLSv1_1)) &&
3040 SSL_get_security_level(ssl) > need_level) {
3041 /*
3042 * Need to drop to security level 1 (or 0 with OpenSSL
3043 * 3.0) to allow TLS versions older than 1.2 to be used
3044 * when explicitly enabled in configuration.
3045 */
3046 SSL_set_security_level(conn->ssl, need_level);
3047 }
3048 }
3049 #endif
3050
3051 #ifdef CONFIG_SUITEB
3052 #ifdef OPENSSL_IS_BORINGSSL
3053 /* Start with defaults from BoringSSL */
3054 SSL_CTX_set_verify_algorithm_prefs(conn->ssl_ctx, NULL, 0);
3055 #endif /* OPENSSL_IS_BORINGSSL */
3056 #if OPENSSL_VERSION_NUMBER >= 0x10002000L
3057 if (flags & TLS_CONN_SUITEB_NO_ECDH) {
3058 const char *ciphers = "DHE-RSA-AES256-GCM-SHA384";
3059
3060 if (openssl_ciphers) {
3061 wpa_printf(MSG_DEBUG,
3062 "OpenSSL: Override ciphers for Suite B (no ECDH): %s",
3063 openssl_ciphers);
3064 ciphers = openssl_ciphers;
3065 }
3066 if (SSL_set_cipher_list(ssl, ciphers) != 1) {
3067 wpa_printf(MSG_INFO,
3068 "OpenSSL: Failed to set Suite B ciphers");
3069 return -1;
3070 }
3071 } else if (flags & TLS_CONN_SUITEB) {
3072 EC_KEY *ecdh;
3073 const char *ciphers =
3074 "ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384";
3075 int nid[1] = { NID_secp384r1 };
3076
3077 if (openssl_ciphers) {
3078 wpa_printf(MSG_DEBUG,
3079 "OpenSSL: Override ciphers for Suite B: %s",
3080 openssl_ciphers);
3081 ciphers = openssl_ciphers;
3082 }
3083 if (SSL_set_cipher_list(ssl, ciphers) != 1) {
3084 wpa_printf(MSG_INFO,
3085 "OpenSSL: Failed to set Suite B ciphers");
3086 return -1;
3087 }
3088
3089 if (SSL_set1_curves(ssl, nid, 1) != 1) {
3090 wpa_printf(MSG_INFO,
3091 "OpenSSL: Failed to set Suite B curves");
3092 return -1;
3093 }
3094
3095 ecdh = EC_KEY_new_by_curve_name(NID_secp384r1);
3096 if (!ecdh || SSL_set_tmp_ecdh(ssl, ecdh) != 1) {
3097 EC_KEY_free(ecdh);
3098 wpa_printf(MSG_INFO,
3099 "OpenSSL: Failed to set ECDH parameter");
3100 return -1;
3101 }
3102 EC_KEY_free(ecdh);
3103 }
3104 if (flags & (TLS_CONN_SUITEB | TLS_CONN_SUITEB_NO_ECDH)) {
3105 #ifdef OPENSSL_IS_BORINGSSL
3106 uint16_t sigalgs[1] = { SSL_SIGN_RSA_PKCS1_SHA384 };
3107
3108 if (SSL_CTX_set_verify_algorithm_prefs(conn->ssl_ctx, sigalgs,
3109 1) != 1) {
3110 wpa_printf(MSG_INFO,
3111 "OpenSSL: Failed to set Suite B sigalgs");
3112 return -1;
3113 }
3114 #else /* OPENSSL_IS_BORINGSSL */
3115 /* ECDSA+SHA384 if need to add EC support here */
3116 if (SSL_set1_sigalgs_list(ssl, "RSA+SHA384") != 1) {
3117 wpa_printf(MSG_INFO,
3118 "OpenSSL: Failed to set Suite B sigalgs");
3119 return -1;
3120 }
3121 #endif /* OPENSSL_IS_BORINGSSL */
3122
3123 SSL_set_options(ssl, SSL_OP_NO_TLSv1);
3124 SSL_set_options(ssl, SSL_OP_NO_TLSv1_1);
3125 SSL_set_cert_cb(ssl, suiteb_cert_cb, conn);
3126 }
3127 #else /* OPENSSL_VERSION_NUMBER < 0x10002000L */
3128 if (flags & (TLS_CONN_SUITEB | TLS_CONN_SUITEB_NO_ECDH)) {
3129 wpa_printf(MSG_ERROR,
3130 "OpenSSL: Suite B RSA case not supported with this OpenSSL version");
3131 return -1;
3132 }
3133 #endif /* OPENSSL_VERSION_NUMBER */
3134
3135 #ifdef OPENSSL_IS_BORINGSSL
3136 if (openssl_ciphers && os_strcmp(openssl_ciphers, "SUITEB192") == 0) {
3137 uint16_t sigalgs[1] = { SSL_SIGN_ECDSA_SECP384R1_SHA384 };
3138 int nid[1] = { NID_secp384r1 };
3139
3140 if (SSL_set1_curves(ssl, nid, 1) != 1) {
3141 wpa_printf(MSG_INFO,
3142 "OpenSSL: Failed to set Suite B curves");
3143 return -1;
3144 }
3145
3146 if (SSL_CTX_set_verify_algorithm_prefs(conn->ssl_ctx, sigalgs,
3147 1) != 1) {
3148 wpa_printf(MSG_INFO,
3149 "OpenSSL: Failed to set Suite B sigalgs");
3150 return -1;
3151 }
3152 }
3153 #else /* OPENSSL_IS_BORINGSSL */
3154 if (!(flags & (TLS_CONN_SUITEB | TLS_CONN_SUITEB_NO_ECDH)) &&
3155 openssl_ciphers && SSL_set_cipher_list(ssl, openssl_ciphers) != 1) {
3156 wpa_printf(MSG_INFO,
3157 "OpenSSL: Failed to set openssl_ciphers '%s'",
3158 openssl_ciphers);
3159 return -1;
3160 }
3161 #endif /* OPENSSL_IS_BORINGSSL */
3162 #else /* CONFIG_SUITEB */
3163 if (openssl_ciphers && SSL_set_cipher_list(ssl, openssl_ciphers) != 1) {
3164 wpa_printf(MSG_INFO,
3165 "OpenSSL: Failed to set openssl_ciphers '%s'",
3166 openssl_ciphers);
3167 return -1;
3168 }
3169 #endif /* CONFIG_SUITEB */
3170
3171 if (flags & TLS_CONN_TEAP_ANON_DH) {
3172 #ifndef TEAP_DH_ANON_CS
3173 #define TEAP_DH_ANON_CS \
3174 "ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:" \
3175 "ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:" \
3176 "ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:" \
3177 "DHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:" \
3178 "DHE-RSA-AES256-SHA256:DHE-RSA-AES128-SHA256:" \
3179 "DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:" \
3180 "ADH-AES256-GCM-SHA384:ADH-AES128-GCM-SHA256:" \
3181 "ADH-AES256-SHA256:ADH-AES128-SHA256:ADH-AES256-SHA:ADH-AES128-SHA"
3182 #endif
3183 static const char *cs = TEAP_DH_ANON_CS;
3184
3185 #if OPENSSL_VERSION_NUMBER >= 0x10100000L && \
3186 !defined(LIBRESSL_VERSION_NUMBER) && \
3187 !defined(OPENSSL_IS_BORINGSSL)
3188 /*
3189 * Need to drop to security level 0 to allow anonymous
3190 * cipher suites for EAP-TEAP.
3191 */
3192 SSL_set_security_level(conn->ssl, 0);
3193 #endif
3194
3195 wpa_printf(MSG_DEBUG,
3196 "OpenSSL: Enable cipher suites for anonymous EAP-TEAP provisioning: %s",
3197 cs);
3198 if (SSL_set_cipher_list(conn->ssl, cs) != 1) {
3199 tls_show_errors(MSG_INFO, __func__,
3200 "Cipher suite configuration failed");
3201 return -1;
3202 }
3203 }
3204
3205 return 0;
3206 }
3207
3208
tls_connection_set_verify(void * ssl_ctx,struct tls_connection * conn,int verify_peer,unsigned int flags,const u8 * session_ctx,size_t session_ctx_len)3209 int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn,
3210 int verify_peer, unsigned int flags,
3211 const u8 *session_ctx, size_t session_ctx_len)
3212 {
3213 static int counter = 0;
3214 struct tls_data *data = ssl_ctx;
3215
3216 if (conn == NULL)
3217 return -1;
3218
3219 if (verify_peer == 2) {
3220 conn->ca_cert_verify = 1;
3221 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER |
3222 SSL_VERIFY_CLIENT_ONCE, tls_verify_cb);
3223 } else if (verify_peer) {
3224 conn->ca_cert_verify = 1;
3225 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER |
3226 SSL_VERIFY_FAIL_IF_NO_PEER_CERT |
3227 SSL_VERIFY_CLIENT_ONCE, tls_verify_cb);
3228 } else {
3229 conn->ca_cert_verify = 0;
3230 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
3231 }
3232
3233 if (tls_set_conn_flags(conn, flags, NULL) < 0)
3234 return -1;
3235 conn->flags = flags;
3236
3237 SSL_set_accept_state(conn->ssl);
3238
3239 if (data->tls_session_lifetime == 0) {
3240 /*
3241 * Set session id context to a unique value to make sure
3242 * session resumption cannot be used either through session
3243 * caching or TLS ticket extension.
3244 */
3245 counter++;
3246 SSL_set_session_id_context(conn->ssl,
3247 (const unsigned char *) &counter,
3248 sizeof(counter));
3249 } else if (session_ctx) {
3250 SSL_set_session_id_context(conn->ssl, session_ctx,
3251 session_ctx_len);
3252 }
3253
3254 return 0;
3255 }
3256
3257
tls_connection_client_cert(struct tls_connection * conn,const char * client_cert,const u8 * client_cert_blob,size_t client_cert_blob_len)3258 static int tls_connection_client_cert(struct tls_connection *conn,
3259 const char *client_cert,
3260 const u8 *client_cert_blob,
3261 size_t client_cert_blob_len)
3262 {
3263 if (client_cert == NULL && client_cert_blob == NULL)
3264 return 0;
3265
3266 #ifdef PKCS12_FUNCS
3267 #if OPENSSL_VERSION_NUMBER < 0x10002000L || defined(LIBRESSL_VERSION_NUMBER)
3268 /*
3269 * Clear previously set extra chain certificates, if any, from PKCS#12
3270 * processing in tls_parse_pkcs12() to allow OpenSSL to build a new
3271 * chain properly.
3272 */
3273 SSL_CTX_clear_extra_chain_certs(conn->ssl_ctx);
3274 #endif /* OPENSSL_VERSION_NUMBER < 0x10002000L */
3275 #endif /* PKCS12_FUNCS */
3276
3277 if (client_cert_blob &&
3278 SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob,
3279 client_cert_blob_len) == 1) {
3280 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> "
3281 "OK");
3282 return 0;
3283 } else if (client_cert_blob) {
3284 #if defined(LIBRESSL_VERSION_NUMBER) && LIBRESSL_VERSION_NUMBER < 0x20901000L
3285 tls_show_errors(MSG_DEBUG, __func__,
3286 "SSL_use_certificate_ASN1 failed");
3287 #else
3288 BIO *bio;
3289 X509 *x509;
3290
3291 tls_show_errors(MSG_DEBUG, __func__,
3292 "SSL_use_certificate_ASN1 failed");
3293 bio = BIO_new(BIO_s_mem());
3294 if (!bio)
3295 return -1;
3296 BIO_write(bio, client_cert_blob, client_cert_blob_len);
3297 x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL);
3298 if (!x509 || SSL_use_certificate(conn->ssl, x509) != 1) {
3299 X509_free(x509);
3300 BIO_free(bio);
3301 return -1;
3302 }
3303 X509_free(x509);
3304 wpa_printf(MSG_DEBUG,
3305 "OpenSSL: Found PEM encoded certificate from blob");
3306 while ((x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL))) {
3307 wpa_printf(MSG_DEBUG,
3308 "OpenSSL: Added an additional certificate into the chain");
3309 SSL_add0_chain_cert(conn->ssl, x509);
3310 }
3311 BIO_free(bio);
3312 return 0;
3313 #endif
3314 }
3315
3316 if (client_cert == NULL)
3317 return -1;
3318
3319 #ifdef ANDROID
3320 if (os_strncmp("keystore://", client_cert, 11) == 0) {
3321 BIO *bio = BIO_from_keystore(&client_cert[11]);
3322 X509 *x509 = NULL;
3323 int ret = -1;
3324 if (bio) {
3325 x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL);
3326 }
3327 if (x509) {
3328 if (SSL_use_certificate(conn->ssl, x509) == 1)
3329 ret = 0;
3330 X509_free(x509);
3331 }
3332
3333 /* Read additional certificates into the chain. */
3334 while (bio) {
3335 x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL);
3336 if (x509) {
3337 /* Takes ownership of x509 */
3338 SSL_add0_chain_cert(conn->ssl, x509);
3339 } else {
3340 BIO_free(bio);
3341 bio = NULL;
3342 }
3343 }
3344 return ret;
3345 }
3346 #endif /* ANDROID */
3347
3348 #ifdef CONFIG_OHOS_CERTMGR
3349 if (os_strncmp(OH_PREFIX, client_cert, os_strlen(OH_PREFIX)) == 0) {
3350 int ret = -1;
3351 X509 *x509 = NULL;
3352
3353 struct Credential certificate = { 0 };
3354 certificate.credData.data = (uint8_t *)malloc(MAX_LEN_CERTIFICATE_CHAIN);
3355 if (certificate.credData.data == NULL) {
3356 wpa_printf(MSG_ERROR, "%s malloc certificate.credData.data fail", __func__);
3357 return -1;
3358 }
3359
3360 BIO *bio = BIO_from_cm(&client_cert[0], certificate);
3361
3362 if (!bio) {
3363 wpa_printf(MSG_DEBUG, "tls_connection_client_cert: bio = NULL");
3364 if (certificate.credData.data != NULL) {
3365 free(certificate.credData.data);
3366 }
3367 return -1;
3368 }
3369
3370 x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL);
3371 if (x509) {
3372 if (SSL_use_certificate(conn->ssl, x509) == 1) {
3373 ret = 0;
3374 }
3375 X509_free(x509);
3376 }
3377
3378 /* Read additional certificates into the chain. */
3379 while (bio) {
3380 x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL);
3381 if (x509) {
3382 /* Takes ownership of x509 */
3383 SSL_add0_chain_cert(conn->ssl, x509);
3384 } else {
3385 BIO_free(bio);
3386 bio = NULL;
3387 }
3388 }
3389
3390 if (certificate.credData.data != NULL) {
3391 free(certificate.credData.data);
3392 }
3393
3394 return ret;
3395 }
3396 #endif
3397
3398 #ifndef OPENSSL_NO_STDIO
3399 if (SSL_use_certificate_file(conn->ssl, client_cert,
3400 SSL_FILETYPE_ASN1) == 1) {
3401 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)"
3402 " --> OK");
3403 return 0;
3404 }
3405
3406 #if OPENSSL_VERSION_NUMBER >= 0x10100000L && \
3407 !defined(LIBRESSL_VERSION_NUMBER) && !defined(OPENSSL_IS_BORINGSSL)
3408 if (SSL_use_certificate_chain_file(conn->ssl, client_cert) == 1) {
3409 ERR_clear_error();
3410 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_chain_file"
3411 " --> OK");
3412 return 0;
3413 }
3414 #else
3415 if (SSL_use_certificate_file(conn->ssl, client_cert,
3416 SSL_FILETYPE_PEM) == 1) {
3417 ERR_clear_error();
3418 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)"
3419 " --> OK");
3420 return 0;
3421 }
3422 #endif
3423
3424 tls_show_errors(MSG_DEBUG, __func__,
3425 "SSL_use_certificate_file failed");
3426 #else /* OPENSSL_NO_STDIO */
3427 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
3428 #endif /* OPENSSL_NO_STDIO */
3429
3430 return -1;
3431 }
3432
3433
tls_global_client_cert(struct tls_data * data,const char * client_cert)3434 static int tls_global_client_cert(struct tls_data *data,
3435 const char *client_cert)
3436 {
3437 #ifndef OPENSSL_NO_STDIO
3438 SSL_CTX *ssl_ctx = data->ssl;
3439
3440 if (client_cert == NULL)
3441 return 0;
3442
3443 if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
3444 SSL_FILETYPE_ASN1) != 1 &&
3445 SSL_CTX_use_certificate_chain_file(ssl_ctx, client_cert) != 1 &&
3446 SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
3447 SSL_FILETYPE_PEM) != 1) {
3448 tls_show_errors(MSG_INFO, __func__,
3449 "Failed to load client certificate");
3450 return -1;
3451 }
3452 return 0;
3453 #else /* OPENSSL_NO_STDIO */
3454 if (client_cert == NULL)
3455 return 0;
3456 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
3457 return -1;
3458 #endif /* OPENSSL_NO_STDIO */
3459 }
3460
3461
3462 #ifdef PKCS12_FUNCS
tls_parse_pkcs12(struct tls_data * data,SSL * ssl,PKCS12 * p12,const char * passwd)3463 static int tls_parse_pkcs12(struct tls_data *data, SSL *ssl, PKCS12 *p12,
3464 const char *passwd)
3465 {
3466 EVP_PKEY *pkey;
3467 X509 *cert;
3468 STACK_OF(X509) *certs;
3469 int res = 0;
3470 char buf[256];
3471
3472 pkey = NULL;
3473 cert = NULL;
3474 certs = NULL;
3475 if (!passwd)
3476 passwd = "";
3477 if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) {
3478 tls_show_errors(MSG_DEBUG, __func__,
3479 "Failed to parse PKCS12 file");
3480 PKCS12_free(p12);
3481 return -1;
3482 }
3483 wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data");
3484
3485 if (cert) {
3486 X509_NAME_oneline(X509_get_subject_name(cert), buf,
3487 sizeof(buf));
3488 wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: "
3489 "subject='%s'", buf);
3490 if (ssl) {
3491 if (SSL_use_certificate(ssl, cert) != 1)
3492 res = -1;
3493 } else {
3494 if (SSL_CTX_use_certificate(data->ssl, cert) != 1)
3495 res = -1;
3496 }
3497 X509_free(cert);
3498 }
3499
3500 if (pkey) {
3501 wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12");
3502 if (ssl) {
3503 if (SSL_use_PrivateKey(ssl, pkey) != 1)
3504 res = -1;
3505 } else {
3506 if (SSL_CTX_use_PrivateKey(data->ssl, pkey) != 1)
3507 res = -1;
3508 }
3509 EVP_PKEY_free(pkey);
3510 }
3511
3512 if (certs) {
3513 #if OPENSSL_VERSION_NUMBER >= 0x10002000L && !defined(LIBRESSL_VERSION_NUMBER)
3514 if (ssl)
3515 SSL_clear_chain_certs(ssl);
3516 else
3517 SSL_CTX_clear_chain_certs(data->ssl);
3518 while ((cert = sk_X509_pop(certs)) != NULL) {
3519 X509_NAME_oneline(X509_get_subject_name(cert), buf,
3520 sizeof(buf));
3521 wpa_printf(MSG_DEBUG, "TLS: additional certificate"
3522 " from PKCS12: subject='%s'", buf);
3523 if ((ssl && SSL_add1_chain_cert(ssl, cert) != 1) ||
3524 (!ssl && SSL_CTX_add1_chain_cert(data->ssl,
3525 cert) != 1)) {
3526 tls_show_errors(MSG_DEBUG, __func__,
3527 "Failed to add additional certificate");
3528 res = -1;
3529 X509_free(cert);
3530 break;
3531 }
3532 X509_free(cert);
3533 }
3534 if (!res) {
3535 /* Try to continue anyway */
3536 }
3537 sk_X509_pop_free(certs, X509_free);
3538 #ifndef OPENSSL_IS_BORINGSSL
3539 if (ssl)
3540 res = SSL_build_cert_chain(
3541 ssl,
3542 SSL_BUILD_CHAIN_FLAG_CHECK |
3543 SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR);
3544 else
3545 res = SSL_CTX_build_cert_chain(
3546 data->ssl,
3547 SSL_BUILD_CHAIN_FLAG_CHECK |
3548 SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR);
3549 if (!res) {
3550 tls_show_errors(MSG_DEBUG, __func__,
3551 "Failed to build certificate chain");
3552 } else if (res == 2) {
3553 wpa_printf(MSG_DEBUG,
3554 "TLS: Ignore certificate chain verification error when building chain with PKCS#12 extra certificates");
3555 }
3556 #endif /* OPENSSL_IS_BORINGSSL */
3557 /*
3558 * Try to continue regardless of result since it is possible for
3559 * the extra certificates not to be required.
3560 */
3561 res = 0;
3562 #else /* OPENSSL_VERSION_NUMBER >= 0x10002000L */
3563 SSL_CTX_clear_extra_chain_certs(data->ssl);
3564 while ((cert = sk_X509_pop(certs)) != NULL) {
3565 X509_NAME_oneline(X509_get_subject_name(cert), buf,
3566 sizeof(buf));
3567 wpa_printf(MSG_DEBUG, "TLS: additional certificate"
3568 " from PKCS12: subject='%s'", buf);
3569 /*
3570 * There is no SSL equivalent for the chain cert - so
3571 * always add it to the context...
3572 */
3573 if (SSL_CTX_add_extra_chain_cert(data->ssl, cert) != 1)
3574 {
3575 X509_free(cert);
3576 res = -1;
3577 break;
3578 }
3579 }
3580 sk_X509_pop_free(certs, X509_free);
3581 #endif /* OPENSSL_VERSION_NUMBER >= 0x10002000L */
3582 }
3583
3584 PKCS12_free(p12);
3585
3586 if (res < 0)
3587 tls_get_errors(data);
3588
3589 return res;
3590 }
3591 #endif /* PKCS12_FUNCS */
3592
3593
tls_read_pkcs12(struct tls_data * data,SSL * ssl,const char * private_key,const char * passwd)3594 static int tls_read_pkcs12(struct tls_data *data, SSL *ssl,
3595 const char *private_key, const char *passwd)
3596 {
3597 #ifdef PKCS12_FUNCS
3598 FILE *f;
3599 PKCS12 *p12;
3600
3601 f = fopen(private_key, "rb");
3602 if (f == NULL)
3603 return -1;
3604
3605 p12 = d2i_PKCS12_fp(f, NULL);
3606 fclose(f);
3607
3608 if (p12 == NULL) {
3609 tls_show_errors(MSG_INFO, __func__,
3610 "Failed to use PKCS#12 file");
3611 return -1;
3612 }
3613
3614 return tls_parse_pkcs12(data, ssl, p12, passwd);
3615
3616 #else /* PKCS12_FUNCS */
3617 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read "
3618 "p12/pfx files");
3619 return -1;
3620 #endif /* PKCS12_FUNCS */
3621 }
3622
3623
tls_read_pkcs12_blob(struct tls_data * data,SSL * ssl,const u8 * blob,size_t len,const char * passwd)3624 static int tls_read_pkcs12_blob(struct tls_data *data, SSL *ssl,
3625 const u8 *blob, size_t len, const char *passwd)
3626 {
3627 #ifdef PKCS12_FUNCS
3628 PKCS12 *p12;
3629
3630 p12 = d2i_PKCS12(NULL, (const unsigned char **) &blob, len);
3631 if (p12 == NULL) {
3632 tls_show_errors(MSG_INFO, __func__,
3633 "Failed to use PKCS#12 blob");
3634 return -1;
3635 }
3636
3637 return tls_parse_pkcs12(data, ssl, p12, passwd);
3638
3639 #else /* PKCS12_FUNCS */
3640 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse "
3641 "p12/pfx blobs");
3642 return -1;
3643 #endif /* PKCS12_FUNCS */
3644 }
3645
3646
3647 #ifndef OPENSSL_NO_ENGINE
tls_engine_get_cert(struct tls_connection * conn,const char * cert_id,X509 ** cert)3648 static int tls_engine_get_cert(struct tls_connection *conn,
3649 const char *cert_id,
3650 X509 **cert)
3651 {
3652 /* this runs after the private key is loaded so no PIN is required */
3653 struct {
3654 const char *cert_id;
3655 X509 *cert;
3656 } params;
3657 params.cert_id = cert_id;
3658 params.cert = NULL;
3659
3660 if (!ENGINE_ctrl_cmd(conn->engine, "LOAD_CERT_CTRL",
3661 0, ¶ms, NULL, 1)) {
3662 unsigned long err = ERR_get_error();
3663
3664 wpa_printf(MSG_ERROR, "ENGINE: cannot load client cert with id"
3665 " '%s' [%s]", cert_id,
3666 ERR_error_string(err, NULL));
3667 if (tls_is_pin_error(err))
3668 return TLS_SET_PARAMS_ENGINE_PRV_BAD_PIN;
3669 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
3670 }
3671 if (!params.cert) {
3672 wpa_printf(MSG_ERROR, "ENGINE: did not properly cert with id"
3673 " '%s'", cert_id);
3674 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
3675 }
3676 *cert = params.cert;
3677 return 0;
3678 }
3679 #endif /* OPENSSL_NO_ENGINE */
3680
3681
tls_connection_engine_client_cert(struct tls_connection * conn,const char * cert_id)3682 static int tls_connection_engine_client_cert(struct tls_connection *conn,
3683 const char *cert_id)
3684 {
3685 #ifndef OPENSSL_NO_ENGINE
3686 X509 *cert;
3687
3688 if (tls_engine_get_cert(conn, cert_id, &cert))
3689 return -1;
3690
3691 if (!SSL_use_certificate(conn->ssl, cert)) {
3692 tls_show_errors(MSG_ERROR, __func__,
3693 "SSL_use_certificate failed");
3694 X509_free(cert);
3695 return -1;
3696 }
3697 X509_free(cert);
3698 wpa_printf(MSG_DEBUG, "ENGINE: SSL_use_certificate --> "
3699 "OK");
3700 return 0;
3701
3702 #else /* OPENSSL_NO_ENGINE */
3703 return -1;
3704 #endif /* OPENSSL_NO_ENGINE */
3705 }
3706
3707
tls_connection_engine_ca_cert(struct tls_data * data,struct tls_connection * conn,const char * ca_cert_id)3708 static int tls_connection_engine_ca_cert(struct tls_data *data,
3709 struct tls_connection *conn,
3710 const char *ca_cert_id)
3711 {
3712 #ifndef OPENSSL_NO_ENGINE
3713 X509 *cert;
3714 SSL_CTX *ssl_ctx = data->ssl;
3715 X509_STORE *store;
3716
3717 if (tls_engine_get_cert(conn, ca_cert_id, &cert))
3718 return -1;
3719
3720 /* start off the same as tls_connection_ca_cert */
3721 store = X509_STORE_new();
3722 if (store == NULL) {
3723 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
3724 "certificate store", __func__);
3725 X509_free(cert);
3726 return -1;
3727 }
3728 SSL_CTX_set_cert_store(ssl_ctx, store);
3729 if (!X509_STORE_add_cert(store, cert)) {
3730 unsigned long err = ERR_peek_error();
3731 tls_show_errors(MSG_WARNING, __func__,
3732 "Failed to add CA certificate from engine "
3733 "to certificate store");
3734 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
3735 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
3736 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring cert"
3737 " already in hash table error",
3738 __func__);
3739 } else {
3740 X509_free(cert);
3741 return -1;
3742 }
3743 }
3744 X509_free(cert);
3745 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added CA certificate from engine "
3746 "to certificate store", __func__);
3747 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
3748 conn->ca_cert_verify = 1;
3749
3750 return 0;
3751
3752 #else /* OPENSSL_NO_ENGINE */
3753 return -1;
3754 #endif /* OPENSSL_NO_ENGINE */
3755 }
3756
3757
tls_connection_engine_private_key(struct tls_connection * conn)3758 static int tls_connection_engine_private_key(struct tls_connection *conn)
3759 {
3760 #if defined(ANDROID) || !defined(OPENSSL_NO_ENGINE)
3761 if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) {
3762 tls_show_errors(MSG_ERROR, __func__,
3763 "ENGINE: cannot use private key for TLS");
3764 return -1;
3765 }
3766 if (!SSL_check_private_key(conn->ssl)) {
3767 tls_show_errors(MSG_INFO, __func__,
3768 "Private key failed verification");
3769 return -1;
3770 }
3771 return 0;
3772 #else /* OPENSSL_NO_ENGINE */
3773 wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but "
3774 "engine support was not compiled in");
3775 return -1;
3776 #endif /* OPENSSL_NO_ENGINE */
3777 }
3778
3779
3780 #ifndef OPENSSL_NO_STDIO
tls_passwd_cb(char * buf,int size,int rwflag,void * password)3781 static int tls_passwd_cb(char *buf, int size, int rwflag, void *password)
3782 {
3783 if (!password)
3784 return 0;
3785 os_strlcpy(buf, (const char *) password, size);
3786 return os_strlen(buf);
3787 }
3788 #endif /* OPENSSL_NO_STDIO */
3789
3790
tls_use_private_key_file(struct tls_data * data,SSL * ssl,const char * private_key,const char * private_key_passwd)3791 static int tls_use_private_key_file(struct tls_data *data, SSL *ssl,
3792 const char *private_key,
3793 const char *private_key_passwd)
3794 {
3795 #ifndef OPENSSL_NO_STDIO
3796 BIO *bio;
3797 EVP_PKEY *pkey;
3798 int ret;
3799
3800 /* First try ASN.1 (DER). */
3801 bio = BIO_new_file(private_key, "r");
3802 if (!bio)
3803 return -1;
3804 pkey = d2i_PrivateKey_bio(bio, NULL);
3805 BIO_free(bio);
3806
3807 if (pkey) {
3808 wpa_printf(MSG_DEBUG, "OpenSSL: %s (DER) --> loaded", __func__);
3809 } else {
3810 /* Try PEM with the provided password. */
3811 bio = BIO_new_file(private_key, "r");
3812 if (!bio)
3813 return -1;
3814 pkey = PEM_read_bio_PrivateKey(bio, NULL, tls_passwd_cb,
3815 (void *) private_key_passwd);
3816 BIO_free(bio);
3817 if (!pkey)
3818 return -1;
3819 wpa_printf(MSG_DEBUG, "OpenSSL: %s (PEM) --> loaded", __func__);
3820 /* Clear errors from the previous failed load. */
3821 ERR_clear_error();
3822 }
3823
3824 if (ssl)
3825 ret = SSL_use_PrivateKey(ssl, pkey);
3826 else
3827 ret = SSL_CTX_use_PrivateKey(data->ssl, pkey);
3828
3829 EVP_PKEY_free(pkey);
3830 return ret == 1 ? 0 : -1;
3831 #else /* OPENSSL_NO_STDIO */
3832 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
3833 return -1;
3834 #endif /* OPENSSL_NO_STDIO */
3835 }
3836
3837 #ifdef CONFIG_OHOS_CERTMGR
tls_use_cm_key(struct tls_data * data,SSL * ssl,const char * private_key)3838 static int tls_use_cm_key(struct tls_data *data, SSL *ssl, const char *private_key)
3839 {
3840 int ret;
3841 EVP_PKEY *pkey = GET_EVP_PKEY(private_key);
3842 if (pkey == NULL) {
3843 wpa_printf(MSG_DEBUG, "can not get evp pkey");
3844 return -1;
3845 }
3846 if (ssl)
3847 ret = SSL_use_PrivateKey(ssl, pkey);
3848 else
3849 ret = SSL_CTX_use_PrivateKey(data->ssl, pkey);
3850
3851 EVP_PKEY_free(pkey);
3852 return ret == 1 ? 0 : -1;
3853 }
3854 #endif
3855
tls_connection_private_key(struct tls_data * data,struct tls_connection * conn,const char * private_key,const char * private_key_passwd,const u8 * private_key_blob,size_t private_key_blob_len)3856 static int tls_connection_private_key(struct tls_data *data,
3857 struct tls_connection *conn,
3858 const char *private_key,
3859 const char *private_key_passwd,
3860 const u8 *private_key_blob,
3861 size_t private_key_blob_len)
3862 {
3863 BIO *bio;
3864 int ok;
3865
3866 if (private_key == NULL && private_key_blob == NULL)
3867 return 0;
3868
3869 ok = 0;
3870 while (private_key_blob) {
3871 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl,
3872 (u8 *) private_key_blob,
3873 private_key_blob_len) == 1) {
3874 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
3875 "ASN1(EVP_PKEY_RSA) --> OK");
3876 ok = 1;
3877 break;
3878 }
3879
3880 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl,
3881 (u8 *) private_key_blob,
3882 private_key_blob_len) == 1) {
3883 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
3884 "ASN1(EVP_PKEY_DSA) --> OK");
3885 ok = 1;
3886 break;
3887 }
3888
3889 #ifndef OPENSSL_NO_EC
3890 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_EC, conn->ssl,
3891 (u8 *) private_key_blob,
3892 private_key_blob_len) == 1) {
3893 wpa_printf(MSG_DEBUG,
3894 "OpenSSL: SSL_use_PrivateKey_ASN1(EVP_PKEY_EC) --> OK");
3895 ok = 1;
3896 break;
3897 }
3898 #endif /* OPENSSL_NO_EC */
3899
3900 if (SSL_use_RSAPrivateKey_ASN1(conn->ssl,
3901 (u8 *) private_key_blob,
3902 private_key_blob_len) == 1) {
3903 wpa_printf(MSG_DEBUG, "OpenSSL: "
3904 "SSL_use_RSAPrivateKey_ASN1 --> OK");
3905 ok = 1;
3906 break;
3907 }
3908
3909 bio = BIO_new_mem_buf((u8 *) private_key_blob,
3910 private_key_blob_len);
3911 if (bio) {
3912 EVP_PKEY *pkey;
3913
3914 pkey = PEM_read_bio_PrivateKey(
3915 bio, NULL, tls_passwd_cb,
3916 (void *) private_key_passwd);
3917 if (pkey) {
3918 if (SSL_use_PrivateKey(conn->ssl, pkey) == 1) {
3919 wpa_printf(MSG_DEBUG,
3920 "OpenSSL: SSL_use_PrivateKey --> OK");
3921 ok = 1;
3922 EVP_PKEY_free(pkey);
3923 BIO_free(bio);
3924 break;
3925 }
3926 EVP_PKEY_free(pkey);
3927 }
3928 BIO_free(bio);
3929 }
3930
3931 if (tls_read_pkcs12_blob(data, conn->ssl, private_key_blob,
3932 private_key_blob_len,
3933 private_key_passwd) == 0) {
3934 wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> "
3935 "OK");
3936 ok = 1;
3937 break;
3938 }
3939
3940 break;
3941 }
3942
3943 while (!ok && private_key) {
3944 #ifdef CONFIG_OHOS_CERTMGR
3945 if (tls_use_cm_key(data, conn->ssl, private_key) == 0) {
3946 ok = 1;
3947 break;
3948 }
3949 #endif
3950
3951 if (tls_use_private_key_file(data, conn->ssl, private_key,
3952 private_key_passwd) == 0) {
3953 ok = 1;
3954 break;
3955 }
3956
3957 if (tls_read_pkcs12(data, conn->ssl, private_key,
3958 private_key_passwd) == 0) {
3959 wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file "
3960 "--> OK");
3961 ok = 1;
3962 break;
3963 }
3964
3965 if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) {
3966 wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to "
3967 "access certificate store --> OK");
3968 ok = 1;
3969 break;
3970 }
3971
3972 break;
3973 }
3974
3975 if (!ok) {
3976 tls_show_errors(MSG_INFO, __func__,
3977 "Failed to load private key");
3978 return -1;
3979 }
3980 ERR_clear_error();
3981
3982 if (!SSL_check_private_key(conn->ssl)) {
3983 tls_show_errors(MSG_INFO, __func__, "Private key failed "
3984 "verification");
3985 return -1;
3986 }
3987
3988 wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully");
3989 return 0;
3990 }
3991
3992
tls_global_private_key(struct tls_data * data,const char * private_key,const char * private_key_passwd)3993 static int tls_global_private_key(struct tls_data *data,
3994 const char *private_key,
3995 const char *private_key_passwd)
3996 {
3997 SSL_CTX *ssl_ctx = data->ssl;
3998
3999 if (private_key == NULL)
4000 return 0;
4001
4002 if (tls_use_private_key_file(data, NULL, private_key,
4003 private_key_passwd) &&
4004 tls_read_pkcs12(data, NULL, private_key, private_key_passwd)) {
4005 tls_show_errors(MSG_INFO, __func__,
4006 "Failed to load private key");
4007 ERR_clear_error();
4008 return -1;
4009 }
4010 ERR_clear_error();
4011
4012 if (!SSL_CTX_check_private_key(ssl_ctx)) {
4013 tls_show_errors(MSG_INFO, __func__,
4014 "Private key failed verification");
4015 return -1;
4016 }
4017
4018 return 0;
4019 }
4020
4021
tls_connection_dh(struct tls_connection * conn,const char * dh_file)4022 static int tls_connection_dh(struct tls_connection *conn, const char *dh_file)
4023 {
4024 #ifdef OPENSSL_NO_DH
4025 if (dh_file == NULL)
4026 return 0;
4027 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
4028 "dh_file specified");
4029 return -1;
4030 #else /* OPENSSL_NO_DH */
4031 DH *dh;
4032 BIO *bio;
4033
4034 /* TODO: add support for dh_blob */
4035 if (dh_file == NULL)
4036 return 0;
4037 if (conn == NULL)
4038 return -1;
4039
4040 bio = BIO_new_file(dh_file, "r");
4041 if (bio == NULL) {
4042 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
4043 dh_file, ERR_error_string(ERR_get_error(), NULL));
4044 return -1;
4045 }
4046 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
4047 BIO_free(bio);
4048 #ifndef OPENSSL_NO_DSA
4049 while (dh == NULL) {
4050 DSA *dsa;
4051 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
4052 " trying to parse as DSA params", dh_file,
4053 ERR_error_string(ERR_get_error(), NULL));
4054 bio = BIO_new_file(dh_file, "r");
4055 if (bio == NULL)
4056 break;
4057 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
4058 BIO_free(bio);
4059 if (!dsa) {
4060 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
4061 "'%s': %s", dh_file,
4062 ERR_error_string(ERR_get_error(), NULL));
4063 break;
4064 }
4065
4066 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
4067 dh = DSA_dup_DH(dsa);
4068 DSA_free(dsa);
4069 if (dh == NULL) {
4070 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
4071 "params into DH params");
4072 break;
4073 }
4074 break;
4075 }
4076 #endif /* !OPENSSL_NO_DSA */
4077 if (dh == NULL) {
4078 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
4079 "'%s'", dh_file);
4080 return -1;
4081 }
4082
4083 if (SSL_set_tmp_dh(conn->ssl, dh) != 1) {
4084 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
4085 "%s", dh_file,
4086 ERR_error_string(ERR_get_error(), NULL));
4087 DH_free(dh);
4088 return -1;
4089 }
4090 DH_free(dh);
4091 return 0;
4092 #endif /* OPENSSL_NO_DH */
4093 }
4094
4095
tls_global_dh(struct tls_data * data,const char * dh_file)4096 static int tls_global_dh(struct tls_data *data, const char *dh_file)
4097 {
4098 #ifdef OPENSSL_NO_DH
4099 if (dh_file == NULL)
4100 return 0;
4101 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
4102 "dh_file specified");
4103 return -1;
4104 #else /* OPENSSL_NO_DH */
4105 SSL_CTX *ssl_ctx = data->ssl;
4106 DH *dh;
4107 BIO *bio;
4108
4109 /* TODO: add support for dh_blob */
4110 if (dh_file == NULL)
4111 return 0;
4112 if (ssl_ctx == NULL)
4113 return -1;
4114
4115 bio = BIO_new_file(dh_file, "r");
4116 if (bio == NULL) {
4117 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
4118 dh_file, ERR_error_string(ERR_get_error(), NULL));
4119 return -1;
4120 }
4121 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
4122 BIO_free(bio);
4123 #ifndef OPENSSL_NO_DSA
4124 while (dh == NULL) {
4125 DSA *dsa;
4126 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
4127 " trying to parse as DSA params", dh_file,
4128 ERR_error_string(ERR_get_error(), NULL));
4129 bio = BIO_new_file(dh_file, "r");
4130 if (bio == NULL)
4131 break;
4132 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
4133 BIO_free(bio);
4134 if (!dsa) {
4135 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
4136 "'%s': %s", dh_file,
4137 ERR_error_string(ERR_get_error(), NULL));
4138 break;
4139 }
4140
4141 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
4142 dh = DSA_dup_DH(dsa);
4143 DSA_free(dsa);
4144 if (dh == NULL) {
4145 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
4146 "params into DH params");
4147 break;
4148 }
4149 break;
4150 }
4151 #endif /* !OPENSSL_NO_DSA */
4152 if (dh == NULL) {
4153 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
4154 "'%s'", dh_file);
4155 return -1;
4156 }
4157
4158 if (SSL_CTX_set_tmp_dh(ssl_ctx, dh) != 1) {
4159 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
4160 "%s", dh_file,
4161 ERR_error_string(ERR_get_error(), NULL));
4162 DH_free(dh);
4163 return -1;
4164 }
4165 DH_free(dh);
4166 return 0;
4167 #endif /* OPENSSL_NO_DH */
4168 }
4169
4170
tls_connection_get_random(void * ssl_ctx,struct tls_connection * conn,struct tls_random * keys)4171 int tls_connection_get_random(void *ssl_ctx, struct tls_connection *conn,
4172 struct tls_random *keys)
4173 {
4174 SSL *ssl;
4175
4176 if (conn == NULL || keys == NULL)
4177 return -1;
4178 ssl = conn->ssl;
4179 if (ssl == NULL)
4180 return -1;
4181
4182 os_memset(keys, 0, sizeof(*keys));
4183 keys->client_random = conn->client_random;
4184 keys->client_random_len = SSL_get_client_random(
4185 ssl, conn->client_random, sizeof(conn->client_random));
4186 keys->server_random = conn->server_random;
4187 keys->server_random_len = SSL_get_server_random(
4188 ssl, conn->server_random, sizeof(conn->server_random));
4189
4190 return 0;
4191 }
4192
4193
4194 #ifdef OPENSSL_NEED_EAP_FAST_PRF
openssl_get_keyblock_size(SSL * ssl)4195 static int openssl_get_keyblock_size(SSL *ssl)
4196 {
4197 #if OPENSSL_VERSION_NUMBER < 0x10100000L || \
4198 (defined(LIBRESSL_VERSION_NUMBER) && \
4199 LIBRESSL_VERSION_NUMBER < 0x20700000L)
4200 const EVP_CIPHER *c;
4201 const EVP_MD *h;
4202 int md_size;
4203
4204 if (ssl->enc_read_ctx == NULL || ssl->enc_read_ctx->cipher == NULL ||
4205 ssl->read_hash == NULL)
4206 return -1;
4207
4208 c = ssl->enc_read_ctx->cipher;
4209 h = EVP_MD_CTX_md(ssl->read_hash);
4210 if (h)
4211 md_size = EVP_MD_size(h);
4212 else if (ssl->s3)
4213 md_size = ssl->s3->tmp.new_mac_secret_size;
4214 else
4215 return -1;
4216
4217 wpa_printf(MSG_DEBUG, "OpenSSL: keyblock size: key_len=%d MD_size=%d "
4218 "IV_len=%d", EVP_CIPHER_key_length(c), md_size,
4219 EVP_CIPHER_iv_length(c));
4220 return 2 * (EVP_CIPHER_key_length(c) +
4221 md_size +
4222 EVP_CIPHER_iv_length(c));
4223 #else
4224 const SSL_CIPHER *ssl_cipher;
4225 int cipher, digest;
4226 const EVP_CIPHER *c;
4227 const EVP_MD *h;
4228 int mac_key_len, enc_key_len, fixed_iv_len;
4229
4230 ssl_cipher = SSL_get_current_cipher(ssl);
4231 if (!ssl_cipher)
4232 return -1;
4233 cipher = SSL_CIPHER_get_cipher_nid(ssl_cipher);
4234 digest = SSL_CIPHER_get_digest_nid(ssl_cipher);
4235 wpa_printf(MSG_DEBUG, "OpenSSL: cipher nid %d digest nid %d",
4236 cipher, digest);
4237 if (cipher < 0 || digest < 0)
4238 return -1;
4239 if (cipher == NID_undef) {
4240 wpa_printf(MSG_DEBUG, "OpenSSL: no cipher in use?!");
4241 return -1;
4242 }
4243 c = EVP_get_cipherbynid(cipher);
4244 if (!c)
4245 return -1;
4246 enc_key_len = EVP_CIPHER_key_length(c);
4247 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE ||
4248 EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE)
4249 fixed_iv_len = 4; /* only part of IV from PRF */
4250 else
4251 fixed_iv_len = EVP_CIPHER_iv_length(c);
4252 if (digest == NID_undef) {
4253 wpa_printf(MSG_DEBUG, "OpenSSL: no digest in use (e.g., AEAD)");
4254 mac_key_len = 0;
4255 } else {
4256 h = EVP_get_digestbynid(digest);
4257 if (!h)
4258 return -1;
4259 mac_key_len = EVP_MD_size(h);
4260 }
4261
4262 wpa_printf(MSG_DEBUG,
4263 "OpenSSL: keyblock size: mac_key_len=%d enc_key_len=%d fixed_iv_len=%d",
4264 mac_key_len, enc_key_len, fixed_iv_len);
4265 return 2 * (mac_key_len + enc_key_len + fixed_iv_len);
4266 #endif
4267 }
4268 #endif /* OPENSSL_NEED_EAP_FAST_PRF */
4269
4270
tls_connection_export_key(void * tls_ctx,struct tls_connection * conn,const char * label,const u8 * context,size_t context_len,u8 * out,size_t out_len)4271 int tls_connection_export_key(void *tls_ctx, struct tls_connection *conn,
4272 const char *label, const u8 *context,
4273 size_t context_len, u8 *out, size_t out_len)
4274 {
4275 if (!conn ||
4276 SSL_export_keying_material(conn->ssl, out, out_len, label,
4277 os_strlen(label), context, context_len,
4278 context != NULL) != 1)
4279 return -1;
4280 return 0;
4281 }
4282
4283
tls_connection_get_eap_fast_key(void * tls_ctx,struct tls_connection * conn,u8 * out,size_t out_len)4284 int tls_connection_get_eap_fast_key(void *tls_ctx, struct tls_connection *conn,
4285 u8 *out, size_t out_len)
4286 {
4287 #ifdef OPENSSL_NEED_EAP_FAST_PRF
4288 SSL *ssl;
4289 SSL_SESSION *sess;
4290 u8 *rnd;
4291 int ret = -1;
4292 int skip = 0;
4293 u8 *tmp_out = NULL;
4294 u8 *_out = out;
4295 unsigned char client_random[SSL3_RANDOM_SIZE];
4296 unsigned char server_random[SSL3_RANDOM_SIZE];
4297 unsigned char master_key[64];
4298 size_t master_key_len;
4299 const char *ver;
4300
4301 /*
4302 * TLS library did not support EAP-FAST key generation, so get the
4303 * needed TLS session parameters and use an internal implementation of
4304 * TLS PRF to derive the key.
4305 */
4306
4307 if (conn == NULL)
4308 return -1;
4309 ssl = conn->ssl;
4310 if (ssl == NULL)
4311 return -1;
4312 ver = SSL_get_version(ssl);
4313 sess = SSL_get_session(ssl);
4314 if (!ver || !sess)
4315 return -1;
4316
4317 skip = openssl_get_keyblock_size(ssl);
4318 if (skip < 0)
4319 return -1;
4320 tmp_out = os_malloc(skip + out_len);
4321 if (!tmp_out)
4322 return -1;
4323 _out = tmp_out;
4324
4325 rnd = os_malloc(2 * SSL3_RANDOM_SIZE);
4326 if (!rnd) {
4327 os_free(tmp_out);
4328 return -1;
4329 }
4330
4331 SSL_get_client_random(ssl, client_random, sizeof(client_random));
4332 SSL_get_server_random(ssl, server_random, sizeof(server_random));
4333 master_key_len = SSL_SESSION_get_master_key(sess, master_key,
4334 sizeof(master_key));
4335
4336 os_memcpy(rnd, server_random, SSL3_RANDOM_SIZE);
4337 os_memcpy(rnd + SSL3_RANDOM_SIZE, client_random, SSL3_RANDOM_SIZE);
4338
4339 if (os_strcmp(ver, "TLSv1.2") == 0) {
4340 tls_prf_sha256(master_key, master_key_len,
4341 "key expansion", rnd, 2 * SSL3_RANDOM_SIZE,
4342 _out, skip + out_len);
4343 ret = 0;
4344 } else if (tls_prf_sha1_md5(master_key, master_key_len,
4345 "key expansion", rnd, 2 * SSL3_RANDOM_SIZE,
4346 _out, skip + out_len) == 0) {
4347 ret = 0;
4348 }
4349 forced_memzero(master_key, sizeof(master_key));
4350 os_free(rnd);
4351 if (ret == 0)
4352 os_memcpy(out, _out + skip, out_len);
4353 bin_clear_free(tmp_out, skip);
4354
4355 return ret;
4356 #else /* OPENSSL_NEED_EAP_FAST_PRF */
4357 wpa_printf(MSG_ERROR,
4358 "OpenSSL: EAP-FAST keys cannot be exported in FIPS mode");
4359 return -1;
4360 #endif /* OPENSSL_NEED_EAP_FAST_PRF */
4361 }
4362
4363
4364 static struct wpabuf *
openssl_handshake(struct tls_connection * conn,const struct wpabuf * in_data)4365 openssl_handshake(struct tls_connection *conn, const struct wpabuf *in_data)
4366 {
4367 int res;
4368 struct wpabuf *out_data;
4369
4370 /*
4371 * Give TLS handshake data from the server (if available) to OpenSSL
4372 * for processing.
4373 */
4374 if (in_data && wpabuf_len(in_data) > 0 &&
4375 BIO_write(conn->ssl_in, wpabuf_head(in_data), wpabuf_len(in_data))
4376 < 0) {
4377 tls_show_errors(MSG_INFO, __func__,
4378 "Handshake failed - BIO_write");
4379 return NULL;
4380 }
4381
4382 /* Initiate TLS handshake or continue the existing handshake */
4383 if (conn->server)
4384 res = SSL_accept(conn->ssl);
4385 else
4386 res = SSL_connect(conn->ssl);
4387 if (res != 1) {
4388 int err = SSL_get_error(conn->ssl, res);
4389 if (err == SSL_ERROR_WANT_READ)
4390 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want "
4391 "more data");
4392 else if (err == SSL_ERROR_WANT_WRITE)
4393 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to "
4394 "write");
4395 else {
4396 tls_show_errors(MSG_INFO, __func__, "SSL_connect");
4397 conn->failed++;
4398 if (!conn->server && !conn->client_hello_generated) {
4399 /* The server would not understand TLS Alert
4400 * before ClientHello, so simply terminate
4401 * handshake on this type of error case caused
4402 * by a likely internal error like no ciphers
4403 * available. */
4404 wpa_printf(MSG_DEBUG,
4405 "OpenSSL: Could not generate ClientHello");
4406 conn->write_alerts++;
4407 return NULL;
4408 }
4409 }
4410 }
4411
4412 if (!conn->server && !conn->failed)
4413 conn->client_hello_generated = 1;
4414
4415 #ifdef CONFIG_SUITEB
4416 if ((conn->flags & TLS_CONN_SUITEB) && !conn->server &&
4417 os_strncmp(SSL_get_cipher(conn->ssl), "DHE-", 4) == 0 &&
4418 conn->server_dh_prime_len < 3072) {
4419 struct tls_context *context = conn->context;
4420
4421 /*
4422 * This should not be reached since earlier cert_cb should have
4423 * terminated the handshake. Keep this check here for extra
4424 * protection if anything goes wrong with the more low-level
4425 * checks based on having to parse the TLS handshake messages.
4426 */
4427 wpa_printf(MSG_DEBUG,
4428 "OpenSSL: Server DH prime length: %d bits",
4429 conn->server_dh_prime_len);
4430
4431 if (context->event_cb) {
4432 union tls_event_data ev;
4433
4434 os_memset(&ev, 0, sizeof(ev));
4435 ev.alert.is_local = 1;
4436 ev.alert.type = "fatal";
4437 ev.alert.description = "insufficient security";
4438 context->event_cb(context->cb_ctx, TLS_ALERT, &ev);
4439 }
4440 /*
4441 * Could send a TLS Alert to the server, but for now, simply
4442 * terminate handshake.
4443 */
4444 conn->failed++;
4445 conn->write_alerts++;
4446 return NULL;
4447 }
4448 #endif /* CONFIG_SUITEB */
4449
4450 /* Get the TLS handshake data to be sent to the server */
4451 res = BIO_ctrl_pending(conn->ssl_out);
4452 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
4453 out_data = wpabuf_alloc(res);
4454 if (out_data == NULL) {
4455 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
4456 "handshake output (%d bytes)", res);
4457 if (BIO_reset(conn->ssl_out) < 0) {
4458 tls_show_errors(MSG_INFO, __func__,
4459 "BIO_reset failed");
4460 }
4461 return NULL;
4462 }
4463 res = res == 0 ? 0 : BIO_read(conn->ssl_out, wpabuf_mhead(out_data),
4464 res);
4465 if (res < 0) {
4466 tls_show_errors(MSG_INFO, __func__,
4467 "Handshake failed - BIO_read");
4468 if (BIO_reset(conn->ssl_out) < 0) {
4469 tls_show_errors(MSG_INFO, __func__,
4470 "BIO_reset failed");
4471 }
4472 wpabuf_free(out_data);
4473 return NULL;
4474 }
4475 wpabuf_put(out_data, res);
4476
4477 return out_data;
4478 }
4479
4480
4481 static struct wpabuf *
openssl_get_appl_data(struct tls_connection * conn,size_t max_len)4482 openssl_get_appl_data(struct tls_connection *conn, size_t max_len)
4483 {
4484 struct wpabuf *appl_data;
4485 int res;
4486
4487 appl_data = wpabuf_alloc(max_len + 100);
4488 if (appl_data == NULL)
4489 return NULL;
4490
4491 res = SSL_read(conn->ssl, wpabuf_mhead(appl_data),
4492 wpabuf_size(appl_data));
4493 if (res < 0) {
4494 int err = SSL_get_error(conn->ssl, res);
4495 if (err == SSL_ERROR_WANT_READ ||
4496 err == SSL_ERROR_WANT_WRITE) {
4497 wpa_printf(MSG_DEBUG, "SSL: No Application Data "
4498 "included");
4499 } else {
4500 tls_show_errors(MSG_INFO, __func__,
4501 "Failed to read possible "
4502 "Application Data");
4503 }
4504 wpabuf_free(appl_data);
4505 return NULL;
4506 }
4507
4508 wpabuf_put(appl_data, res);
4509 wpa_hexdump_buf_key(MSG_MSGDUMP, "SSL: Application Data in Finished "
4510 "message", appl_data);
4511
4512 return appl_data;
4513 }
4514
4515
4516 static struct wpabuf *
openssl_connection_handshake(struct tls_connection * conn,const struct wpabuf * in_data,struct wpabuf ** appl_data)4517 openssl_connection_handshake(struct tls_connection *conn,
4518 const struct wpabuf *in_data,
4519 struct wpabuf **appl_data)
4520 {
4521 struct wpabuf *out_data;
4522
4523 if (appl_data)
4524 *appl_data = NULL;
4525
4526 out_data = openssl_handshake(conn, in_data);
4527 if (out_data == NULL)
4528 return NULL;
4529 if (conn->invalid_hb_used) {
4530 wpa_printf(MSG_INFO, "TLS: Heartbeat attack detected - do not send response");
4531 wpabuf_free(out_data);
4532 return NULL;
4533 }
4534
4535 if (SSL_is_init_finished(conn->ssl)) {
4536 wpa_printf(MSG_DEBUG,
4537 "OpenSSL: Handshake finished - resumed=%d",
4538 tls_connection_resumed(conn->ssl_ctx, conn));
4539 if (conn->server) {
4540 char *buf;
4541 size_t buflen = 2000;
4542
4543 buf = os_malloc(buflen);
4544 if (buf) {
4545 if (SSL_get_shared_ciphers(conn->ssl, buf,
4546 buflen)) {
4547 buf[buflen - 1] = '\0';
4548 wpa_printf(MSG_DEBUG,
4549 "OpenSSL: Shared ciphers: %s",
4550 buf);
4551 }
4552 os_free(buf);
4553 }
4554 }
4555 if (appl_data && in_data)
4556 *appl_data = openssl_get_appl_data(conn,
4557 wpabuf_len(in_data));
4558 }
4559
4560 if (conn->invalid_hb_used) {
4561 wpa_printf(MSG_INFO, "TLS: Heartbeat attack detected - do not send response");
4562 if (appl_data) {
4563 wpabuf_free(*appl_data);
4564 *appl_data = NULL;
4565 }
4566 wpabuf_free(out_data);
4567 return NULL;
4568 }
4569
4570 return out_data;
4571 }
4572
4573
4574 struct wpabuf *
tls_connection_handshake(void * ssl_ctx,struct tls_connection * conn,const struct wpabuf * in_data,struct wpabuf ** appl_data)4575 tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn,
4576 const struct wpabuf *in_data,
4577 struct wpabuf **appl_data)
4578 {
4579 return openssl_connection_handshake(conn, in_data, appl_data);
4580 }
4581
4582
tls_connection_server_handshake(void * tls_ctx,struct tls_connection * conn,const struct wpabuf * in_data,struct wpabuf ** appl_data)4583 struct wpabuf * tls_connection_server_handshake(void *tls_ctx,
4584 struct tls_connection *conn,
4585 const struct wpabuf *in_data,
4586 struct wpabuf **appl_data)
4587 {
4588 conn->server = 1;
4589 return openssl_connection_handshake(conn, in_data, appl_data);
4590 }
4591
4592
tls_connection_encrypt(void * tls_ctx,struct tls_connection * conn,const struct wpabuf * in_data)4593 struct wpabuf * tls_connection_encrypt(void *tls_ctx,
4594 struct tls_connection *conn,
4595 const struct wpabuf *in_data)
4596 {
4597 int res;
4598 struct wpabuf *buf;
4599
4600 if (conn == NULL)
4601 return NULL;
4602
4603 /* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */
4604 if ((res = BIO_reset(conn->ssl_in)) < 0 ||
4605 (res = BIO_reset(conn->ssl_out)) < 0) {
4606 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
4607 return NULL;
4608 }
4609 res = SSL_write(conn->ssl, wpabuf_head(in_data), wpabuf_len(in_data));
4610 if (res < 0) {
4611 tls_show_errors(MSG_INFO, __func__,
4612 "Encryption failed - SSL_write");
4613 return NULL;
4614 }
4615
4616 /* Read encrypted data to be sent to the server */
4617 buf = wpabuf_alloc(wpabuf_len(in_data) + 300);
4618 if (buf == NULL)
4619 return NULL;
4620 res = BIO_read(conn->ssl_out, wpabuf_mhead(buf), wpabuf_size(buf));
4621 if (res < 0) {
4622 tls_show_errors(MSG_INFO, __func__,
4623 "Encryption failed - BIO_read");
4624 wpabuf_free(buf);
4625 return NULL;
4626 }
4627 wpabuf_put(buf, res);
4628
4629 return buf;
4630 }
4631
4632
tls_connection_decrypt(void * tls_ctx,struct tls_connection * conn,const struct wpabuf * in_data)4633 struct wpabuf * tls_connection_decrypt(void *tls_ctx,
4634 struct tls_connection *conn,
4635 const struct wpabuf *in_data)
4636 {
4637 int res;
4638 struct wpabuf *buf;
4639
4640 /* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */
4641 res = BIO_write(conn->ssl_in, wpabuf_head(in_data),
4642 wpabuf_len(in_data));
4643 if (res < 0) {
4644 tls_show_errors(MSG_INFO, __func__,
4645 "Decryption failed - BIO_write");
4646 return NULL;
4647 }
4648 if (BIO_reset(conn->ssl_out) < 0) {
4649 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
4650 return NULL;
4651 }
4652
4653 /* Read decrypted data for further processing */
4654 /*
4655 * Even though we try to disable TLS compression, it is possible that
4656 * this cannot be done with all TLS libraries. Add extra buffer space
4657 * to handle the possibility of the decrypted data being longer than
4658 * input data.
4659 */
4660 buf = wpabuf_alloc((wpabuf_len(in_data) + 500) * 3);
4661 if (buf == NULL)
4662 return NULL;
4663 res = SSL_read(conn->ssl, wpabuf_mhead(buf), wpabuf_size(buf));
4664 if (res < 0) {
4665 int err = SSL_get_error(conn->ssl, res);
4666
4667 if (err == SSL_ERROR_WANT_READ) {
4668 wpa_printf(MSG_DEBUG,
4669 "SSL: SSL_connect - want more data");
4670 res = 0;
4671 } else {
4672 tls_show_errors(MSG_INFO, __func__,
4673 "Decryption failed - SSL_read");
4674 wpabuf_free(buf);
4675 return NULL;
4676 }
4677 }
4678 wpabuf_put(buf, res);
4679
4680 if (conn->invalid_hb_used) {
4681 wpa_printf(MSG_INFO, "TLS: Heartbeat attack detected - do not send response");
4682 wpabuf_free(buf);
4683 return NULL;
4684 }
4685
4686 return buf;
4687 }
4688
4689
tls_connection_resumed(void * ssl_ctx,struct tls_connection * conn)4690 int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn)
4691 {
4692 return conn ? SSL_session_reused(conn->ssl) : 0;
4693 }
4694
4695
tls_connection_set_cipher_list(void * tls_ctx,struct tls_connection * conn,u8 * ciphers)4696 int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
4697 u8 *ciphers)
4698 {
4699 char buf[500], *pos, *end;
4700 u8 *c;
4701 int ret;
4702
4703 if (conn == NULL || conn->ssl == NULL || ciphers == NULL)
4704 return -1;
4705
4706 buf[0] = '\0';
4707 pos = buf;
4708 end = pos + sizeof(buf);
4709
4710 c = ciphers;
4711 while (*c != TLS_CIPHER_NONE) {
4712 const char *suite;
4713
4714 switch (*c) {
4715 case TLS_CIPHER_RC4_SHA:
4716 suite = "RC4-SHA";
4717 break;
4718 case TLS_CIPHER_AES128_SHA:
4719 suite = "AES128-SHA";
4720 break;
4721 case TLS_CIPHER_RSA_DHE_AES128_SHA:
4722 suite = "DHE-RSA-AES128-SHA";
4723 break;
4724 case TLS_CIPHER_ANON_DH_AES128_SHA:
4725 suite = "ADH-AES128-SHA";
4726 break;
4727 case TLS_CIPHER_RSA_DHE_AES256_SHA:
4728 suite = "DHE-RSA-AES256-SHA";
4729 break;
4730 case TLS_CIPHER_AES256_SHA:
4731 suite = "AES256-SHA";
4732 break;
4733 default:
4734 wpa_printf(MSG_DEBUG, "TLS: Unsupported "
4735 "cipher selection: %d", *c);
4736 return -1;
4737 }
4738 ret = os_snprintf(pos, end - pos, ":%s", suite);
4739 if (os_snprintf_error(end - pos, ret))
4740 break;
4741 pos += ret;
4742
4743 c++;
4744 }
4745 if (!buf[0]) {
4746 wpa_printf(MSG_DEBUG, "OpenSSL: No ciphers listed");
4747 return -1;
4748 }
4749
4750 wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1);
4751
4752 #if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
4753 #ifdef EAP_FAST_OR_TEAP
4754 if (os_strstr(buf, ":ADH-")) {
4755 /*
4756 * Need to drop to security level 0 to allow anonymous
4757 * cipher suites for EAP-FAST.
4758 */
4759 SSL_set_security_level(conn->ssl, 0);
4760 } else if (SSL_get_security_level(conn->ssl) == 0) {
4761 /* Force at least security level 1 */
4762 SSL_set_security_level(conn->ssl, 1);
4763 }
4764 #endif /* EAP_FAST_OR_TEAP */
4765 #endif
4766
4767 if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) {
4768 tls_show_errors(MSG_INFO, __func__,
4769 "Cipher suite configuration failed");
4770 return -1;
4771 }
4772
4773 return 0;
4774 }
4775
4776
tls_get_version(void * ssl_ctx,struct tls_connection * conn,char * buf,size_t buflen)4777 int tls_get_version(void *ssl_ctx, struct tls_connection *conn,
4778 char *buf, size_t buflen)
4779 {
4780 const char *name;
4781 if (conn == NULL || conn->ssl == NULL)
4782 return -1;
4783
4784 name = SSL_get_version(conn->ssl);
4785 if (name == NULL)
4786 return -1;
4787
4788 os_strlcpy(buf, name, buflen);
4789 return 0;
4790 }
4791
4792
tls_get_cipher(void * ssl_ctx,struct tls_connection * conn,char * buf,size_t buflen)4793 int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn,
4794 char *buf, size_t buflen)
4795 {
4796 const char *name;
4797 if (conn == NULL || conn->ssl == NULL)
4798 return -1;
4799
4800 name = SSL_get_cipher(conn->ssl);
4801 if (name == NULL)
4802 return -1;
4803
4804 os_strlcpy(buf, name, buflen);
4805 return 0;
4806 }
4807
4808
tls_connection_enable_workaround(void * ssl_ctx,struct tls_connection * conn)4809 int tls_connection_enable_workaround(void *ssl_ctx,
4810 struct tls_connection *conn)
4811 {
4812 SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
4813
4814 return 0;
4815 }
4816
4817
4818 #ifdef EAP_FAST_OR_TEAP
4819 /* ClientHello TLS extensions require a patch to openssl, so this function is
4820 * commented out unless explicitly needed for EAP-FAST in order to be able to
4821 * build this file with unmodified openssl. */
tls_connection_client_hello_ext(void * ssl_ctx,struct tls_connection * conn,int ext_type,const u8 * data,size_t data_len)4822 int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn,
4823 int ext_type, const u8 *data,
4824 size_t data_len)
4825 {
4826 if (conn == NULL || conn->ssl == NULL || ext_type != 35)
4827 return -1;
4828
4829 if (SSL_set_session_ticket_ext(conn->ssl, (void *) data,
4830 data_len) != 1)
4831 return -1;
4832
4833 return 0;
4834 }
4835 #endif /* EAP_FAST_OR_TEAP */
4836
4837
tls_connection_get_failed(void * ssl_ctx,struct tls_connection * conn)4838 int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn)
4839 {
4840 if (conn == NULL)
4841 return -1;
4842 return conn->failed;
4843 }
4844
4845
tls_connection_get_read_alerts(void * ssl_ctx,struct tls_connection * conn)4846 int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn)
4847 {
4848 if (conn == NULL)
4849 return -1;
4850 return conn->read_alerts;
4851 }
4852
4853
tls_connection_get_write_alerts(void * ssl_ctx,struct tls_connection * conn)4854 int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn)
4855 {
4856 if (conn == NULL)
4857 return -1;
4858 return conn->write_alerts;
4859 }
4860
4861
4862 #ifdef HAVE_OCSP
4863
ocsp_debug_print_resp(OCSP_RESPONSE * rsp)4864 static void ocsp_debug_print_resp(OCSP_RESPONSE *rsp)
4865 {
4866 #ifndef CONFIG_NO_STDOUT_DEBUG
4867 BIO *out;
4868 size_t rlen;
4869 char *txt;
4870 int res;
4871
4872 if (wpa_debug_level > MSG_DEBUG)
4873 return;
4874
4875 out = BIO_new(BIO_s_mem());
4876 if (!out)
4877 return;
4878
4879 OCSP_RESPONSE_print(out, rsp, 0);
4880 rlen = BIO_ctrl_pending(out);
4881 txt = os_malloc(rlen + 1);
4882 if (!txt) {
4883 BIO_free(out);
4884 return;
4885 }
4886
4887 res = BIO_read(out, txt, rlen);
4888 if (res > 0) {
4889 txt[res] = '\0';
4890 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP Response\n%s", txt);
4891 }
4892 os_free(txt);
4893 BIO_free(out);
4894 #endif /* CONFIG_NO_STDOUT_DEBUG */
4895 }
4896
4897
ocsp_resp_cb(SSL * s,void * arg)4898 static int ocsp_resp_cb(SSL *s, void *arg)
4899 {
4900 struct tls_connection *conn = arg;
4901 const unsigned char *p;
4902 int len, status, reason, res;
4903 OCSP_RESPONSE *rsp;
4904 OCSP_BASICRESP *basic;
4905 OCSP_CERTID *id;
4906 ASN1_GENERALIZEDTIME *produced_at, *this_update, *next_update;
4907 X509_STORE *store;
4908 STACK_OF(X509) *certs = NULL;
4909
4910 len = SSL_get_tlsext_status_ocsp_resp(s, &p);
4911 if (!p) {
4912 wpa_printf(MSG_DEBUG, "OpenSSL: No OCSP response received");
4913 return (conn->flags & TLS_CONN_REQUIRE_OCSP) ? 0 : 1;
4914 }
4915
4916 wpa_hexdump(MSG_DEBUG, "OpenSSL: OCSP response", p, len);
4917
4918 rsp = d2i_OCSP_RESPONSE(NULL, &p, len);
4919 if (!rsp) {
4920 wpa_printf(MSG_INFO, "OpenSSL: Failed to parse OCSP response");
4921 return 0;
4922 }
4923
4924 ocsp_debug_print_resp(rsp);
4925
4926 status = OCSP_response_status(rsp);
4927 if (status != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
4928 wpa_printf(MSG_INFO, "OpenSSL: OCSP responder error %d (%s)",
4929 status, OCSP_response_status_str(status));
4930 return 0;
4931 }
4932
4933 basic = OCSP_response_get1_basic(rsp);
4934 if (!basic) {
4935 wpa_printf(MSG_INFO, "OpenSSL: Could not find BasicOCSPResponse");
4936 return 0;
4937 }
4938
4939 store = SSL_CTX_get_cert_store(conn->ssl_ctx);
4940 if (conn->peer_issuer) {
4941 debug_print_cert(conn->peer_issuer, "Add OCSP issuer");
4942
4943 if (X509_STORE_add_cert(store, conn->peer_issuer) != 1) {
4944 tls_show_errors(MSG_INFO, __func__,
4945 "OpenSSL: Could not add issuer to certificate store");
4946 }
4947 certs = sk_X509_new_null();
4948 if (certs) {
4949 X509 *cert;
4950 cert = X509_dup(conn->peer_issuer);
4951 if (cert && !sk_X509_push(certs, cert)) {
4952 tls_show_errors(
4953 MSG_INFO, __func__,
4954 "OpenSSL: Could not add issuer to OCSP responder trust store");
4955 X509_free(cert);
4956 sk_X509_free(certs);
4957 certs = NULL;
4958 }
4959 if (certs && conn->peer_issuer_issuer) {
4960 cert = X509_dup(conn->peer_issuer_issuer);
4961 if (cert && !sk_X509_push(certs, cert)) {
4962 tls_show_errors(
4963 MSG_INFO, __func__,
4964 "OpenSSL: Could not add issuer's issuer to OCSP responder trust store");
4965 X509_free(cert);
4966 }
4967 }
4968 }
4969 }
4970
4971 status = OCSP_basic_verify(basic, certs, store, OCSP_TRUSTOTHER);
4972 sk_X509_pop_free(certs, X509_free);
4973 if (status <= 0) {
4974 tls_show_errors(MSG_INFO, __func__,
4975 "OpenSSL: OCSP response failed verification");
4976 OCSP_BASICRESP_free(basic);
4977 OCSP_RESPONSE_free(rsp);
4978 return 0;
4979 }
4980
4981 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP response verification succeeded");
4982
4983 if (!conn->peer_cert) {
4984 wpa_printf(MSG_DEBUG, "OpenSSL: Peer certificate not available for OCSP status check");
4985 OCSP_BASICRESP_free(basic);
4986 OCSP_RESPONSE_free(rsp);
4987 return 0;
4988 }
4989
4990 if (!conn->peer_issuer) {
4991 wpa_printf(MSG_DEBUG, "OpenSSL: Peer issuer certificate not available for OCSP status check");
4992 OCSP_BASICRESP_free(basic);
4993 OCSP_RESPONSE_free(rsp);
4994 return 0;
4995 }
4996
4997 id = OCSP_cert_to_id(EVP_sha256(), conn->peer_cert, conn->peer_issuer);
4998 if (!id) {
4999 wpa_printf(MSG_DEBUG,
5000 "OpenSSL: Could not create OCSP certificate identifier (SHA256)");
5001 OCSP_BASICRESP_free(basic);
5002 OCSP_RESPONSE_free(rsp);
5003 return 0;
5004 }
5005
5006 res = OCSP_resp_find_status(basic, id, &status, &reason, &produced_at,
5007 &this_update, &next_update);
5008 if (!res) {
5009 OCSP_CERTID_free(id);
5010 id = OCSP_cert_to_id(NULL, conn->peer_cert, conn->peer_issuer);
5011 if (!id) {
5012 wpa_printf(MSG_DEBUG,
5013 "OpenSSL: Could not create OCSP certificate identifier (SHA1)");
5014 OCSP_BASICRESP_free(basic);
5015 OCSP_RESPONSE_free(rsp);
5016 return 0;
5017 }
5018
5019 res = OCSP_resp_find_status(basic, id, &status, &reason,
5020 &produced_at, &this_update,
5021 &next_update);
5022 }
5023
5024 if (!res) {
5025 wpa_printf(MSG_INFO, "OpenSSL: Could not find current server certificate from OCSP response%s",
5026 (conn->flags & TLS_CONN_REQUIRE_OCSP) ? "" :
5027 " (OCSP not required)");
5028 OCSP_CERTID_free(id);
5029 OCSP_BASICRESP_free(basic);
5030 OCSP_RESPONSE_free(rsp);
5031 return (conn->flags & TLS_CONN_REQUIRE_OCSP) ? 0 : 1;
5032 }
5033 OCSP_CERTID_free(id);
5034
5035 if (!OCSP_check_validity(this_update, next_update, 5 * 60, -1)) {
5036 tls_show_errors(MSG_INFO, __func__,
5037 "OpenSSL: OCSP status times invalid");
5038 OCSP_BASICRESP_free(basic);
5039 OCSP_RESPONSE_free(rsp);
5040 return 0;
5041 }
5042
5043 OCSP_BASICRESP_free(basic);
5044 OCSP_RESPONSE_free(rsp);
5045
5046 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status for server certificate: %s",
5047 OCSP_cert_status_str(status));
5048
5049 if (status == V_OCSP_CERTSTATUS_GOOD)
5050 return 1;
5051 if (status == V_OCSP_CERTSTATUS_REVOKED)
5052 return 0;
5053 if (conn->flags & TLS_CONN_REQUIRE_OCSP) {
5054 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status unknown, but OCSP required");
5055 return 0;
5056 }
5057 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status unknown, but OCSP was not required, so allow connection to continue");
5058 return 1;
5059 }
5060
5061
ocsp_status_cb(SSL * s,void * arg)5062 static int ocsp_status_cb(SSL *s, void *arg)
5063 {
5064 char *tmp;
5065 char *resp;
5066 size_t len;
5067
5068 if (tls_global->ocsp_stapling_response == NULL) {
5069 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - no response configured");
5070 return SSL_TLSEXT_ERR_OK;
5071 }
5072
5073 resp = os_readfile(tls_global->ocsp_stapling_response, &len);
5074 if (resp == NULL) {
5075 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - could not read response file");
5076 /* TODO: Build OCSPResponse with responseStatus = internalError
5077 */
5078 return SSL_TLSEXT_ERR_OK;
5079 }
5080 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - send cached response");
5081 tmp = OPENSSL_malloc(len);
5082 if (tmp == NULL) {
5083 os_free(resp);
5084 return SSL_TLSEXT_ERR_ALERT_FATAL;
5085 }
5086
5087 os_memcpy(tmp, resp, len);
5088 os_free(resp);
5089 SSL_set_tlsext_status_ocsp_resp(s, tmp, len);
5090
5091 return SSL_TLSEXT_ERR_OK;
5092 }
5093
5094 #endif /* HAVE_OCSP */
5095
5096
max_str_len(const char ** lines)5097 static size_t max_str_len(const char **lines)
5098 {
5099 const char **p;
5100 size_t max_len = 0;
5101
5102 for (p = lines; *p; p++) {
5103 size_t len = os_strlen(*p);
5104
5105 if (len > max_len)
5106 max_len = len;
5107 }
5108
5109 return max_len;
5110 }
5111
5112
match_lines_in_file(const char * path,const char ** lines)5113 static int match_lines_in_file(const char *path, const char **lines)
5114 {
5115 FILE *f;
5116 char *buf;
5117 size_t bufsize;
5118 int found = 0, is_linestart = 1;
5119
5120 bufsize = max_str_len(lines) + sizeof("\r\n");
5121 buf = os_malloc(bufsize);
5122 if (!buf)
5123 return 0;
5124
5125 f = fopen(path, "r");
5126 if (!f) {
5127 os_free(buf);
5128 return 0;
5129 }
5130
5131 while (!found && fgets(buf, bufsize, f)) {
5132 int is_lineend;
5133 size_t len;
5134 const char **p;
5135
5136 len = strcspn(buf, "\r\n");
5137 is_lineend = buf[len] != '\0';
5138 buf[len] = '\0';
5139
5140 if (is_linestart && is_lineend) {
5141 for (p = lines; !found && *p; p++)
5142 found = os_strcmp(buf, *p) == 0;
5143 }
5144 is_linestart = is_lineend;
5145 }
5146
5147 fclose(f);
5148 bin_clear_free(buf, bufsize);
5149
5150 return found;
5151 }
5152
5153
is_tpm2_key(const char * path)5154 static int is_tpm2_key(const char *path)
5155 {
5156 /* Check both new and old format of TPM2 PEM guard tag */
5157 static const char *tpm2_tags[] = {
5158 "-----BEGIN TSS2 PRIVATE KEY-----",
5159 "-----BEGIN TSS2 KEY BLOB-----",
5160 NULL
5161 };
5162
5163 return match_lines_in_file(path, tpm2_tags);
5164 }
5165
5166
tls_connection_set_params(void * tls_ctx,struct tls_connection * conn,const struct tls_connection_params * params)5167 int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
5168 const struct tls_connection_params *params)
5169 {
5170 struct tls_data *data = tls_ctx;
5171 int ret;
5172 unsigned long err;
5173 int can_pkcs11 = 0;
5174 const char *key_id = params->key_id;
5175 const char *cert_id = params->cert_id;
5176 const char *ca_cert_id = params->ca_cert_id;
5177 const char *engine_id = params->engine ? params->engine_id : NULL;
5178 const char *ciphers;
5179
5180 if (conn == NULL)
5181 return -1;
5182
5183 if (params->flags & TLS_CONN_REQUIRE_OCSP_ALL) {
5184 wpa_printf(MSG_INFO,
5185 "OpenSSL: ocsp=3 not supported");
5186 return -1;
5187 }
5188
5189 /*
5190 * If the engine isn't explicitly configured, and any of the
5191 * cert/key fields are actually PKCS#11 URIs, then automatically
5192 * use the PKCS#11 ENGINE.
5193 */
5194 if (!engine_id || os_strcmp(engine_id, "pkcs11") == 0)
5195 can_pkcs11 = 1;
5196
5197 if (!key_id && params->private_key && can_pkcs11 &&
5198 os_strncmp(params->private_key, "pkcs11:", 7) == 0) {
5199 can_pkcs11 = 2;
5200 key_id = params->private_key;
5201 }
5202
5203 if (!cert_id && params->client_cert && can_pkcs11 &&
5204 os_strncmp(params->client_cert, "pkcs11:", 7) == 0) {
5205 can_pkcs11 = 2;
5206 cert_id = params->client_cert;
5207 }
5208
5209 if (!ca_cert_id && params->ca_cert && can_pkcs11 &&
5210 os_strncmp(params->ca_cert, "pkcs11:", 7) == 0) {
5211 can_pkcs11 = 2;
5212 ca_cert_id = params->ca_cert;
5213 }
5214
5215 /* If we need to automatically enable the PKCS#11 ENGINE, do so. */
5216 if (can_pkcs11 == 2 && !engine_id)
5217 engine_id = "pkcs11";
5218
5219 /* If private_key points to a TPM2-wrapped key, automatically enable
5220 * tpm2 engine and use it to unwrap the key. */
5221 if (params->private_key &&
5222 (!engine_id || os_strcmp(engine_id, "tpm2") == 0) &&
5223 is_tpm2_key(params->private_key)) {
5224 wpa_printf(MSG_DEBUG, "OpenSSL: Found TPM2 wrapped key %s",
5225 params->private_key);
5226 key_id = key_id ? key_id : params->private_key;
5227 engine_id = engine_id ? engine_id : "tpm2";
5228 }
5229
5230 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
5231 #if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
5232 if (params->flags & TLS_CONN_EAP_FAST) {
5233 wpa_printf(MSG_DEBUG,
5234 "OpenSSL: Use TLSv1_method() for EAP-FAST");
5235 if (SSL_set_ssl_method(conn->ssl, TLSv1_method()) != 1) {
5236 tls_show_errors(MSG_INFO, __func__,
5237 "Failed to set TLSv1_method() for EAP-FAST");
5238 return -1;
5239 }
5240 }
5241 #endif
5242 #if OPENSSL_VERSION_NUMBER >= 0x10101000L
5243 #ifdef SSL_OP_NO_TLSv1_3
5244 if (params->flags & TLS_CONN_EAP_FAST) {
5245 /* Need to disable TLS v1.3 at least for now since OpenSSL 1.1.1
5246 * refuses to start the handshake with the modified ciphersuite
5247 * list (no TLS v1.3 ciphersuites included) for EAP-FAST. */
5248 wpa_printf(MSG_DEBUG, "OpenSSL: Disable TLSv1.3 for EAP-FAST");
5249 SSL_set_options(conn->ssl, SSL_OP_NO_TLSv1_3);
5250 }
5251 #endif /* SSL_OP_NO_TLSv1_3 */
5252 #endif
5253 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
5254
5255 while ((err = ERR_get_error())) {
5256 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
5257 __func__, ERR_error_string(err, NULL));
5258 }
5259
5260 if (engine_id) {
5261 wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine %s",
5262 engine_id);
5263 ret = tls_engine_init(conn, engine_id, params->pin,
5264 key_id, cert_id, ca_cert_id);
5265 if (ret)
5266 return ret;
5267 }
5268 if (tls_connection_set_subject_match(conn,
5269 params->subject_match,
5270 params->altsubject_match,
5271 params->suffix_match,
5272 params->domain_match,
5273 params->check_cert_subject))
5274 return -1;
5275
5276 if (engine_id && ca_cert_id) {
5277 if (tls_connection_engine_ca_cert(data, conn, ca_cert_id))
5278 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
5279 } else if (tls_connection_ca_cert(data, conn, params->ca_cert,
5280 params->ca_cert_blob,
5281 params->ca_cert_blob_len,
5282 params->ca_path))
5283 return -1;
5284
5285 if (engine_id && cert_id) {
5286 if (tls_connection_engine_client_cert(conn, cert_id))
5287 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
5288 } else if (tls_connection_client_cert(conn, params->client_cert,
5289 params->client_cert_blob,
5290 params->client_cert_blob_len))
5291 return -1;
5292
5293 if (engine_id && key_id) {
5294 wpa_printf(MSG_DEBUG, "TLS: Using private key from engine");
5295 if (tls_connection_engine_private_key(conn))
5296 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
5297 } else if (tls_connection_private_key(data, conn,
5298 params->private_key,
5299 params->private_key_passwd,
5300 params->private_key_blob,
5301 params->private_key_blob_len)) {
5302 wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'",
5303 params->private_key);
5304 return -1;
5305 }
5306
5307 if (tls_connection_dh(conn, params->dh_file)) {
5308 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
5309 params->dh_file);
5310 return -1;
5311 }
5312
5313 ciphers = params->openssl_ciphers;
5314 #ifdef CONFIG_SUITEB
5315 #ifdef OPENSSL_IS_BORINGSSL
5316 if (ciphers && os_strcmp(ciphers, "SUITEB192") == 0) {
5317 /* BoringSSL removed support for SUITEB192, so need to handle
5318 * this with hardcoded ciphersuite and additional checks for
5319 * other parameters. */
5320 ciphers = "ECDHE-ECDSA-AES256-GCM-SHA384";
5321 }
5322 #endif /* OPENSSL_IS_BORINGSSL */
5323 #endif /* CONFIG_SUITEB */
5324 if (ciphers && SSL_set_cipher_list(conn->ssl, ciphers) != 1) {
5325 wpa_printf(MSG_INFO,
5326 "OpenSSL: Failed to set cipher string '%s'",
5327 ciphers);
5328 return -1;
5329 }
5330
5331 if (!params->openssl_ecdh_curves) {
5332 #ifndef OPENSSL_IS_BORINGSSL
5333 #ifndef OPENSSL_NO_EC
5334 #if (OPENSSL_VERSION_NUMBER >= 0x10002000L) && \
5335 (OPENSSL_VERSION_NUMBER < 0x10100000L)
5336 if (SSL_set_ecdh_auto(conn->ssl, 1) != 1) {
5337 wpa_printf(MSG_INFO,
5338 "OpenSSL: Failed to set ECDH curves to auto");
5339 return -1;
5340 }
5341 #endif /* >= 1.0.2 && < 1.1.0 */
5342 #endif /* OPENSSL_NO_EC */
5343 #endif /* OPENSSL_IS_BORINGSSL */
5344 } else if (params->openssl_ecdh_curves[0]) {
5345 #if defined(OPENSSL_IS_BORINGSSL) || (OPENSSL_VERSION_NUMBER < 0x10002000L)
5346 wpa_printf(MSG_INFO,
5347 "OpenSSL: ECDH configuration nnot supported");
5348 return -1;
5349 #else /* OPENSSL_IS_BORINGSSL || < 1.0.2 */
5350 #ifndef OPENSSL_NO_EC
5351 if (SSL_set1_curves_list(conn->ssl,
5352 params->openssl_ecdh_curves) != 1) {
5353 wpa_printf(MSG_INFO,
5354 "OpenSSL: Failed to set ECDH curves '%s'",
5355 params->openssl_ecdh_curves);
5356 return -1;
5357 }
5358 #else /* OPENSSL_NO_EC */
5359 wpa_printf(MSG_INFO, "OpenSSL: ECDH not supported");
5360 return -1;
5361 #endif /* OPENSSL_NO_EC */
5362 #endif /* OPENSSL_IS_BORINGSSL */
5363 }
5364
5365 if (tls_set_conn_flags(conn, params->flags,
5366 params->openssl_ciphers) < 0)
5367 return -1;
5368
5369 #ifdef OPENSSL_IS_BORINGSSL
5370 if (params->flags & TLS_CONN_REQUEST_OCSP) {
5371 SSL_enable_ocsp_stapling(conn->ssl);
5372 }
5373 #else /* OPENSSL_IS_BORINGSSL */
5374 #ifdef HAVE_OCSP
5375 if (params->flags & TLS_CONN_REQUEST_OCSP) {
5376 SSL_CTX *ssl_ctx = data->ssl;
5377 SSL_set_tlsext_status_type(conn->ssl, TLSEXT_STATUSTYPE_ocsp);
5378 SSL_CTX_set_tlsext_status_cb(ssl_ctx, ocsp_resp_cb);
5379 SSL_CTX_set_tlsext_status_arg(ssl_ctx, conn);
5380 }
5381 #else /* HAVE_OCSP */
5382 if (params->flags & TLS_CONN_REQUIRE_OCSP) {
5383 wpa_printf(MSG_INFO,
5384 "OpenSSL: No OCSP support included - reject configuration");
5385 return -1;
5386 }
5387 if (params->flags & TLS_CONN_REQUEST_OCSP) {
5388 wpa_printf(MSG_DEBUG,
5389 "OpenSSL: No OCSP support included - allow optional OCSP case to continue");
5390 }
5391 #endif /* HAVE_OCSP */
5392 #endif /* OPENSSL_IS_BORINGSSL */
5393
5394 conn->flags = params->flags;
5395
5396 tls_get_errors(data);
5397
5398 return 0;
5399 }
5400
5401
openssl_debug_dump_cipher_list(SSL_CTX * ssl_ctx)5402 static void openssl_debug_dump_cipher_list(SSL_CTX *ssl_ctx)
5403 {
5404 SSL *ssl;
5405 int i;
5406
5407 ssl = SSL_new(ssl_ctx);
5408 if (!ssl)
5409 return;
5410
5411 wpa_printf(MSG_DEBUG,
5412 "OpenSSL: Enabled cipher suites in priority order");
5413 for (i = 0; ; i++) {
5414 const char *cipher;
5415
5416 cipher = SSL_get_cipher_list(ssl, i);
5417 if (!cipher)
5418 break;
5419 wpa_printf(MSG_DEBUG, "Cipher %d: %s", i, cipher);
5420 }
5421
5422 SSL_free(ssl);
5423 }
5424
5425
5426 #if !defined(LIBRESSL_VERSION_NUMBER) && !defined(BORINGSSL_API_VERSION)
5427
openssl_pkey_type_str(const EVP_PKEY * pkey)5428 static const char * openssl_pkey_type_str(const EVP_PKEY *pkey)
5429 {
5430 if (!pkey)
5431 return "NULL";
5432 switch (EVP_PKEY_type(EVP_PKEY_id(pkey))) {
5433 case EVP_PKEY_RSA:
5434 return "RSA";
5435 case EVP_PKEY_DSA:
5436 return "DSA";
5437 case EVP_PKEY_DH:
5438 return "DH";
5439 case EVP_PKEY_EC:
5440 return "EC";
5441 }
5442 return "?";
5443 }
5444
5445
openssl_debug_dump_certificate(int i,X509 * cert)5446 static void openssl_debug_dump_certificate(int i, X509 *cert)
5447 {
5448 char buf[256];
5449 EVP_PKEY *pkey;
5450 ASN1_INTEGER *ser;
5451 char serial_num[128];
5452
5453 if (!cert)
5454 return;
5455
5456 X509_NAME_oneline(X509_get_subject_name(cert), buf, sizeof(buf));
5457
5458 ser = X509_get_serialNumber(cert);
5459 if (ser)
5460 wpa_snprintf_hex_uppercase(serial_num, sizeof(serial_num),
5461 ASN1_STRING_get0_data(ser),
5462 ASN1_STRING_length(ser));
5463 else
5464 serial_num[0] = '\0';
5465
5466 pkey = X509_get_pubkey(cert);
5467 wpa_printf(MSG_DEBUG, "%d: %s (%s) %s", i, buf,
5468 openssl_pkey_type_str(pkey), serial_num);
5469 EVP_PKEY_free(pkey);
5470 }
5471
5472
openssl_debug_dump_certificates(SSL_CTX * ssl_ctx)5473 static void openssl_debug_dump_certificates(SSL_CTX *ssl_ctx)
5474 {
5475 STACK_OF(X509) *certs;
5476
5477 wpa_printf(MSG_DEBUG, "OpenSSL: Configured certificate chain");
5478 if (SSL_CTX_get0_chain_certs(ssl_ctx, &certs) == 1) {
5479 int i;
5480
5481 for (i = sk_X509_num(certs); i > 0; i--)
5482 openssl_debug_dump_certificate(i, sk_X509_value(certs,
5483 i - 1));
5484 }
5485 openssl_debug_dump_certificate(0, SSL_CTX_get0_certificate(ssl_ctx));
5486 }
5487
5488 #endif
5489
5490
openssl_debug_dump_certificate_chains(SSL_CTX * ssl_ctx)5491 static void openssl_debug_dump_certificate_chains(SSL_CTX *ssl_ctx)
5492 {
5493 #if !defined(LIBRESSL_VERSION_NUMBER) && !defined(BORINGSSL_API_VERSION)
5494 int res;
5495
5496 for (res = SSL_CTX_set_current_cert(ssl_ctx, SSL_CERT_SET_FIRST);
5497 res == 1;
5498 res = SSL_CTX_set_current_cert(ssl_ctx, SSL_CERT_SET_NEXT))
5499 openssl_debug_dump_certificates(ssl_ctx);
5500
5501 SSL_CTX_set_current_cert(ssl_ctx, SSL_CERT_SET_FIRST);
5502 #endif
5503 }
5504
5505
openssl_debug_dump_ctx(SSL_CTX * ssl_ctx)5506 static void openssl_debug_dump_ctx(SSL_CTX *ssl_ctx)
5507 {
5508 openssl_debug_dump_cipher_list(ssl_ctx);
5509 openssl_debug_dump_certificate_chains(ssl_ctx);
5510 }
5511
5512
tls_global_set_params(void * tls_ctx,const struct tls_connection_params * params)5513 int tls_global_set_params(void *tls_ctx,
5514 const struct tls_connection_params *params)
5515 {
5516 struct tls_data *data = tls_ctx;
5517 SSL_CTX *ssl_ctx = data->ssl;
5518 unsigned long err;
5519
5520 while ((err = ERR_get_error())) {
5521 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
5522 __func__, ERR_error_string(err, NULL));
5523 }
5524
5525 os_free(data->check_cert_subject);
5526 data->check_cert_subject = NULL;
5527 if (params->check_cert_subject) {
5528 data->check_cert_subject =
5529 os_strdup(params->check_cert_subject);
5530 if (!data->check_cert_subject)
5531 return -1;
5532 }
5533
5534 if (tls_global_ca_cert(data, params->ca_cert) ||
5535 tls_global_client_cert(data, params->client_cert) ||
5536 tls_global_private_key(data, params->private_key,
5537 params->private_key_passwd) ||
5538 tls_global_client_cert(data, params->client_cert2) ||
5539 tls_global_private_key(data, params->private_key2,
5540 params->private_key_passwd2) ||
5541 tls_global_dh(data, params->dh_file)) {
5542 wpa_printf(MSG_INFO, "TLS: Failed to set global parameters");
5543 return -1;
5544 }
5545
5546 if (params->openssl_ciphers &&
5547 SSL_CTX_set_cipher_list(ssl_ctx, params->openssl_ciphers) != 1) {
5548 wpa_printf(MSG_INFO,
5549 "OpenSSL: Failed to set cipher string '%s'",
5550 params->openssl_ciphers);
5551 return -1;
5552 }
5553
5554 if (!params->openssl_ecdh_curves) {
5555 #ifndef OPENSSL_IS_BORINGSSL
5556 #ifndef OPENSSL_NO_EC
5557 #if (OPENSSL_VERSION_NUMBER >= 0x10002000L) && \
5558 (OPENSSL_VERSION_NUMBER < 0x10100000L)
5559 if (SSL_CTX_set_ecdh_auto(ssl_ctx, 1) != 1) {
5560 wpa_printf(MSG_INFO,
5561 "OpenSSL: Failed to set ECDH curves to auto");
5562 return -1;
5563 }
5564 #endif /* >= 1.0.2 && < 1.1.0 */
5565 #endif /* OPENSSL_NO_EC */
5566 #endif /* OPENSSL_IS_BORINGSSL */
5567 } else if (params->openssl_ecdh_curves[0]) {
5568 #if defined(OPENSSL_IS_BORINGSSL) || (OPENSSL_VERSION_NUMBER < 0x10002000L)
5569 wpa_printf(MSG_INFO,
5570 "OpenSSL: ECDH configuration nnot supported");
5571 return -1;
5572 #else /* OPENSSL_IS_BORINGSSL || < 1.0.2 */
5573 #ifndef OPENSSL_NO_EC
5574 #if OPENSSL_VERSION_NUMBER < 0x10100000L
5575 SSL_CTX_set_ecdh_auto(ssl_ctx, 1);
5576 #endif
5577 if (SSL_CTX_set1_curves_list(ssl_ctx,
5578 params->openssl_ecdh_curves) !=
5579 1) {
5580 wpa_printf(MSG_INFO,
5581 "OpenSSL: Failed to set ECDH curves '%s'",
5582 params->openssl_ecdh_curves);
5583 return -1;
5584 }
5585 #else /* OPENSSL_NO_EC */
5586 wpa_printf(MSG_INFO, "OpenSSL: ECDH not supported");
5587 return -1;
5588 #endif /* OPENSSL_NO_EC */
5589 #endif /* OPENSSL_IS_BORINGSSL */
5590 }
5591
5592 #ifdef SSL_OP_NO_TICKET
5593 if (params->flags & TLS_CONN_DISABLE_SESSION_TICKET)
5594 SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_TICKET);
5595 else
5596 SSL_CTX_clear_options(ssl_ctx, SSL_OP_NO_TICKET);
5597 #endif /* SSL_OP_NO_TICKET */
5598
5599 #ifdef HAVE_OCSP
5600 SSL_CTX_set_tlsext_status_cb(ssl_ctx, ocsp_status_cb);
5601 SSL_CTX_set_tlsext_status_arg(ssl_ctx, ssl_ctx);
5602 os_free(tls_global->ocsp_stapling_response);
5603 if (params->ocsp_stapling_response)
5604 tls_global->ocsp_stapling_response =
5605 os_strdup(params->ocsp_stapling_response);
5606 else
5607 tls_global->ocsp_stapling_response = NULL;
5608 #endif /* HAVE_OCSP */
5609
5610 openssl_debug_dump_ctx(ssl_ctx);
5611
5612 return 0;
5613 }
5614
5615
5616 #ifdef EAP_FAST_OR_TEAP
5617 /* Pre-shared secred requires a patch to openssl, so this function is
5618 * commented out unless explicitly needed for EAP-FAST in order to be able to
5619 * build this file with unmodified openssl. */
5620
5621 #if (defined(OPENSSL_IS_BORINGSSL) || OPENSSL_VERSION_NUMBER >= 0x10100000L) && !defined(LIBRESSL_VERSION_NUMBER)
tls_sess_sec_cb(SSL * s,void * secret,int * secret_len,STACK_OF (SSL_CIPHER)* peer_ciphers,const SSL_CIPHER ** cipher,void * arg)5622 static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
5623 STACK_OF(SSL_CIPHER) *peer_ciphers,
5624 const SSL_CIPHER **cipher, void *arg)
5625 #else /* OPENSSL_IS_BORINGSSL */
5626 static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
5627 STACK_OF(SSL_CIPHER) *peer_ciphers,
5628 SSL_CIPHER **cipher, void *arg)
5629 #endif /* OPENSSL_IS_BORINGSSL */
5630 {
5631 struct tls_connection *conn = arg;
5632 int ret;
5633
5634 #if OPENSSL_VERSION_NUMBER < 0x10100000L || \
5635 (defined(LIBRESSL_VERSION_NUMBER) && \
5636 LIBRESSL_VERSION_NUMBER < 0x20700000L)
5637 if (conn == NULL || conn->session_ticket_cb == NULL)
5638 return 0;
5639
5640 ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx,
5641 conn->session_ticket,
5642 conn->session_ticket_len,
5643 s->s3->client_random,
5644 s->s3->server_random, secret);
5645 #else
5646 unsigned char client_random[SSL3_RANDOM_SIZE];
5647 unsigned char server_random[SSL3_RANDOM_SIZE];
5648
5649 if (conn == NULL || conn->session_ticket_cb == NULL)
5650 return 0;
5651
5652 SSL_get_client_random(s, client_random, sizeof(client_random));
5653 SSL_get_server_random(s, server_random, sizeof(server_random));
5654
5655 ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx,
5656 conn->session_ticket,
5657 conn->session_ticket_len,
5658 client_random,
5659 server_random, secret);
5660 #endif
5661
5662 os_free(conn->session_ticket);
5663 conn->session_ticket = NULL;
5664
5665 if (ret <= 0)
5666 return 0;
5667
5668 *secret_len = SSL_MAX_MASTER_KEY_LENGTH;
5669 return 1;
5670 }
5671
5672
tls_session_ticket_ext_cb(SSL * s,const unsigned char * data,int len,void * arg)5673 static int tls_session_ticket_ext_cb(SSL *s, const unsigned char *data,
5674 int len, void *arg)
5675 {
5676 struct tls_connection *conn = arg;
5677
5678 if (conn == NULL || conn->session_ticket_cb == NULL)
5679 return 0;
5680
5681 wpa_printf(MSG_DEBUG, "OpenSSL: %s: length=%d", __func__, len);
5682
5683 os_free(conn->session_ticket);
5684 conn->session_ticket = NULL;
5685
5686 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
5687 "extension", data, len);
5688
5689 conn->session_ticket = os_memdup(data, len);
5690 if (conn->session_ticket == NULL)
5691 return 0;
5692
5693 conn->session_ticket_len = len;
5694
5695 return 1;
5696 }
5697 #endif /* EAP_FAST_OR_TEAP */
5698
5699
tls_connection_set_session_ticket_cb(void * tls_ctx,struct tls_connection * conn,tls_session_ticket_cb cb,void * ctx)5700 int tls_connection_set_session_ticket_cb(void *tls_ctx,
5701 struct tls_connection *conn,
5702 tls_session_ticket_cb cb,
5703 void *ctx)
5704 {
5705 #ifdef EAP_FAST_OR_TEAP
5706 conn->session_ticket_cb = cb;
5707 conn->session_ticket_cb_ctx = ctx;
5708
5709 if (cb) {
5710 if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb,
5711 conn) != 1)
5712 return -1;
5713 SSL_set_session_ticket_ext_cb(conn->ssl,
5714 tls_session_ticket_ext_cb, conn);
5715 } else {
5716 if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1)
5717 return -1;
5718 SSL_set_session_ticket_ext_cb(conn->ssl, NULL, NULL);
5719 }
5720
5721 return 0;
5722 #else /* EAP_FAST_OR_TEAP */
5723 return -1;
5724 #endif /* EAP_FAST_OR_TEAP */
5725 }
5726
5727
tls_get_library_version(char * buf,size_t buf_len)5728 int tls_get_library_version(char *buf, size_t buf_len)
5729 {
5730 #if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
5731 return os_snprintf(buf, buf_len, "OpenSSL build=%s run=%s",
5732 OPENSSL_VERSION_TEXT,
5733 OpenSSL_version(OPENSSL_VERSION));
5734 #else
5735 return os_snprintf(buf, buf_len, "OpenSSL build=%s run=%s",
5736 OPENSSL_VERSION_TEXT,
5737 SSLeay_version(SSLEAY_VERSION));
5738 #endif
5739 }
5740
5741
tls_connection_set_success_data(struct tls_connection * conn,struct wpabuf * data)5742 void tls_connection_set_success_data(struct tls_connection *conn,
5743 struct wpabuf *data)
5744 {
5745 SSL_SESSION *sess;
5746 struct wpabuf *old;
5747
5748 if (tls_ex_idx_session < 0)
5749 goto fail;
5750 sess = SSL_get_session(conn->ssl);
5751 if (!sess)
5752 goto fail;
5753 old = SSL_SESSION_get_ex_data(sess, tls_ex_idx_session);
5754 if (old) {
5755 wpa_printf(MSG_DEBUG, "OpenSSL: Replacing old success data %p",
5756 old);
5757 wpabuf_free(old);
5758 }
5759 if (SSL_SESSION_set_ex_data(sess, tls_ex_idx_session, data) != 1)
5760 goto fail;
5761
5762 wpa_printf(MSG_DEBUG, "OpenSSL: Stored success data %p", data);
5763 conn->success_data = 1;
5764 return;
5765
5766 fail:
5767 wpa_printf(MSG_INFO, "OpenSSL: Failed to store success data");
5768 wpabuf_free(data);
5769 }
5770
5771
tls_connection_set_success_data_resumed(struct tls_connection * conn)5772 void tls_connection_set_success_data_resumed(struct tls_connection *conn)
5773 {
5774 wpa_printf(MSG_DEBUG,
5775 "OpenSSL: Success data accepted for resumed session");
5776 conn->success_data = 1;
5777 }
5778
5779
5780 const struct wpabuf *
tls_connection_get_success_data(struct tls_connection * conn)5781 tls_connection_get_success_data(struct tls_connection *conn)
5782 {
5783 SSL_SESSION *sess;
5784
5785 if (tls_ex_idx_session < 0 ||
5786 !(sess = SSL_get_session(conn->ssl)))
5787 return NULL;
5788 return SSL_SESSION_get_ex_data(sess, tls_ex_idx_session);
5789 }
5790
5791
tls_connection_remove_session(struct tls_connection * conn)5792 void tls_connection_remove_session(struct tls_connection *conn)
5793 {
5794 SSL_SESSION *sess;
5795
5796 sess = SSL_get_session(conn->ssl);
5797 if (!sess)
5798 return;
5799
5800 if (SSL_CTX_remove_session(conn->ssl_ctx, sess) != 1)
5801 wpa_printf(MSG_DEBUG,
5802 "OpenSSL: Session was not cached");
5803 else
5804 wpa_printf(MSG_DEBUG,
5805 "OpenSSL: Removed cached session to disable session resumption");
5806 }
5807
5808
tls_get_tls_unique(struct tls_connection * conn,u8 * buf,size_t max_len)5809 int tls_get_tls_unique(struct tls_connection *conn, u8 *buf, size_t max_len)
5810 {
5811 size_t len;
5812 int reused;
5813
5814 reused = SSL_session_reused(conn->ssl);
5815 if ((conn->server && !reused) || (!conn->server && reused))
5816 len = SSL_get_peer_finished(conn->ssl, buf, max_len);
5817 else
5818 len = SSL_get_finished(conn->ssl, buf, max_len);
5819
5820 if (len == 0 || len > max_len)
5821 return -1;
5822
5823 return len;
5824 }
5825
5826
tls_connection_get_cipher_suite(struct tls_connection * conn)5827 u16 tls_connection_get_cipher_suite(struct tls_connection *conn)
5828 {
5829 const SSL_CIPHER *cipher;
5830
5831 cipher = SSL_get_current_cipher(conn->ssl);
5832 if (!cipher)
5833 return 0;
5834 #if OPENSSL_VERSION_NUMBER >= 0x10101000L && !defined(LIBRESSL_VERSION_NUMBER)
5835 return SSL_CIPHER_get_protocol_id(cipher);
5836 #else
5837 return SSL_CIPHER_get_id(cipher) & 0xFFFF;
5838 #endif
5839 }
5840
5841
tls_connection_get_peer_subject(struct tls_connection * conn)5842 const char * tls_connection_get_peer_subject(struct tls_connection *conn)
5843 {
5844 if (conn)
5845 return conn->peer_subject;
5846 return NULL;
5847 }
5848
5849
tls_connection_get_own_cert_used(struct tls_connection * conn)5850 bool tls_connection_get_own_cert_used(struct tls_connection *conn)
5851 {
5852 if (conn)
5853 return SSL_get_certificate(conn->ssl) != NULL;
5854 return false;
5855 }
5856