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/pkcs12.h>
22 #include <openssl/x509v3.h>
23 #ifndef OPENSSL_NO_ENGINE
24 #include <openssl/engine.h>
25 #endif /* OPENSSL_NO_ENGINE */
26 #ifndef OPENSSL_NO_DSA
27 #include <openssl/dsa.h>
28 #endif
29 #ifndef OPENSSL_NO_DH
30 #include <openssl/dh.h>
31 #endif
32
33 #include "common.h"
34 #include "crypto.h"
35 #include "sha1.h"
36 #include "sha256.h"
37 #include "tls.h"
38 #include "tls_openssl.h"
39
40 #if defined(OPENSSL_IS_BORINGSSL)
41 /* stack_index_t is the return type of OpenSSL's sk_XXX_num() functions. */
42 typedef size_t stack_index_t;
43 #else
44 typedef int stack_index_t;
45 #endif
46
47 #ifdef SSL_set_tlsext_status_type
48 #ifndef OPENSSL_NO_TLSEXT
49 #define HAVE_OCSP
50 #include <openssl/ocsp.h>
51 #endif /* OPENSSL_NO_TLSEXT */
52 #endif /* SSL_set_tlsext_status_type */
53
54 #if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
55 /*
56 * SSL_get_client_random() and SSL_get_server_random() were added in OpenSSL
57 * 1.1.0. Provide compatibility wrappers for older versions.
58 */
59
SSL_get_client_random(const SSL * ssl,unsigned char * out,size_t outlen)60 static size_t SSL_get_client_random(const SSL *ssl, unsigned char *out,
61 size_t outlen)
62 {
63 if (!ssl->s3 || outlen < SSL3_RANDOM_SIZE)
64 return 0;
65 os_memcpy(out, ssl->s3->client_random, SSL3_RANDOM_SIZE);
66 return SSL3_RANDOM_SIZE;
67 }
68
69
SSL_get_server_random(const SSL * ssl,unsigned char * out,size_t outlen)70 static size_t SSL_get_server_random(const SSL *ssl, unsigned char *out,
71 size_t outlen)
72 {
73 if (!ssl->s3 || outlen < SSL3_RANDOM_SIZE)
74 return 0;
75 os_memcpy(out, ssl->s3->server_random, SSL3_RANDOM_SIZE);
76 return SSL3_RANDOM_SIZE;
77 }
78
79
SSL_SESSION_get_master_key(const SSL_SESSION * session,unsigned char * out,size_t outlen)80 static size_t SSL_SESSION_get_master_key(const SSL_SESSION *session,
81 unsigned char *out, size_t outlen)
82 {
83 if (!session || session->master_key_length < 0 ||
84 (size_t) session->master_key_length > outlen)
85 return 0;
86 if ((size_t) session->master_key_length < outlen)
87 outlen = session->master_key_length;
88 os_memcpy(out, session->master_key, outlen);
89 return outlen;
90 }
91
92 #endif
93
94 #ifdef ANDROID
95 #include <openssl/pem.h>
96 #include <keystore/keystore_get.h>
97
BIO_from_keystore(const char * key)98 static BIO * BIO_from_keystore(const char *key)
99 {
100 BIO *bio = NULL;
101 uint8_t *value = NULL;
102 int length = keystore_get(key, strlen(key), &value);
103 if (length != -1 && (bio = BIO_new(BIO_s_mem())) != NULL)
104 BIO_write(bio, value, length);
105 free(value);
106 return bio;
107 }
108
109
tls_add_ca_from_keystore(X509_STORE * ctx,const char * key_alias)110 static int tls_add_ca_from_keystore(X509_STORE *ctx, const char *key_alias)
111 {
112 BIO *bio = BIO_from_keystore(key_alias);
113 STACK_OF(X509_INFO) *stack = NULL;
114 stack_index_t i;
115
116 if (bio) {
117 stack = PEM_X509_INFO_read_bio(bio, NULL, NULL, NULL);
118 BIO_free(bio);
119 }
120
121 if (!stack) {
122 wpa_printf(MSG_WARNING, "TLS: Failed to parse certificate: %s",
123 key_alias);
124 return -1;
125 }
126
127 for (i = 0; i < sk_X509_INFO_num(stack); ++i) {
128 X509_INFO *info = sk_X509_INFO_value(stack, i);
129
130 if (info->x509)
131 X509_STORE_add_cert(ctx, info->x509);
132 if (info->crl)
133 X509_STORE_add_crl(ctx, info->crl);
134 }
135
136 sk_X509_INFO_pop_free(stack, X509_INFO_free);
137
138 return 0;
139 }
140
141
tls_add_ca_from_keystore_encoded(X509_STORE * ctx,const char * encoded_key_alias)142 static int tls_add_ca_from_keystore_encoded(X509_STORE *ctx,
143 const char *encoded_key_alias)
144 {
145 int rc = -1;
146 int len = os_strlen(encoded_key_alias);
147 unsigned char *decoded_alias;
148
149 if (len & 1) {
150 wpa_printf(MSG_WARNING, "Invalid hex-encoded alias: %s",
151 encoded_key_alias);
152 return rc;
153 }
154
155 decoded_alias = os_malloc(len / 2 + 1);
156 if (decoded_alias) {
157 if (!hexstr2bin(encoded_key_alias, decoded_alias, len / 2)) {
158 decoded_alias[len / 2] = '\0';
159 rc = tls_add_ca_from_keystore(
160 ctx, (const char *) decoded_alias);
161 }
162 os_free(decoded_alias);
163 }
164
165 return rc;
166 }
167
168 #endif /* ANDROID */
169
170 static int tls_openssl_ref_count = 0;
171 static int tls_ex_idx_session = -1;
172
173 struct tls_context {
174 void (*event_cb)(void *ctx, enum tls_event ev,
175 union tls_event_data *data);
176 void *cb_ctx;
177 int cert_in_cb;
178 char *ocsp_stapling_response;
179 };
180
181 static struct tls_context *tls_global = NULL;
182
183
184 struct tls_data {
185 SSL_CTX *ssl;
186 unsigned int tls_session_lifetime;
187 };
188
189 struct tls_connection {
190 struct tls_context *context;
191 SSL_CTX *ssl_ctx;
192 SSL *ssl;
193 BIO *ssl_in, *ssl_out;
194 #if defined(ANDROID) || !defined(OPENSSL_NO_ENGINE)
195 ENGINE *engine; /* functional reference to the engine */
196 EVP_PKEY *private_key; /* the private key if using engine */
197 #endif /* OPENSSL_NO_ENGINE */
198 char *subject_match, *altsubject_match, *suffix_match, *domain_match;
199 int read_alerts, write_alerts, failed;
200
201 tls_session_ticket_cb session_ticket_cb;
202 void *session_ticket_cb_ctx;
203
204 /* SessionTicket received from OpenSSL hello_extension_cb (server) */
205 u8 *session_ticket;
206 size_t session_ticket_len;
207
208 unsigned int ca_cert_verify:1;
209 unsigned int cert_probe:1;
210 unsigned int server_cert_only:1;
211 unsigned int invalid_hb_used:1;
212 unsigned int success_data:1;
213
214 u8 srv_cert_hash[32];
215
216 unsigned int flags;
217
218 X509 *peer_cert;
219 X509 *peer_issuer;
220 X509 *peer_issuer_issuer;
221
222 unsigned char client_random[SSL3_RANDOM_SIZE];
223 unsigned char server_random[SSL3_RANDOM_SIZE];
224 };
225
226
tls_context_new(const struct tls_config * conf)227 static struct tls_context * tls_context_new(const struct tls_config *conf)
228 {
229 struct tls_context *context = os_zalloc(sizeof(*context));
230 if (context == NULL)
231 return NULL;
232 if (conf) {
233 context->event_cb = conf->event_cb;
234 context->cb_ctx = conf->cb_ctx;
235 context->cert_in_cb = conf->cert_in_cb;
236 }
237 return context;
238 }
239
240
241 #ifdef CONFIG_NO_STDOUT_DEBUG
242
_tls_show_errors(void)243 static void _tls_show_errors(void)
244 {
245 unsigned long err;
246
247 while ((err = ERR_get_error())) {
248 /* Just ignore the errors, since stdout is disabled */
249 }
250 }
251 #define tls_show_errors(l, f, t) _tls_show_errors()
252
253 #else /* CONFIG_NO_STDOUT_DEBUG */
254
tls_show_errors(int level,const char * func,const char * txt)255 static void tls_show_errors(int level, const char *func, const char *txt)
256 {
257 unsigned long err;
258
259 wpa_printf(level, "OpenSSL: %s - %s %s",
260 func, txt, ERR_error_string(ERR_get_error(), NULL));
261
262 while ((err = ERR_get_error())) {
263 wpa_printf(MSG_INFO, "OpenSSL: pending error: %s",
264 ERR_error_string(err, NULL));
265 }
266 }
267
268 #endif /* CONFIG_NO_STDOUT_DEBUG */
269
270
271 #ifdef CONFIG_NATIVE_WINDOWS
272
273 /* Windows CryptoAPI and access to certificate stores */
274 #include <wincrypt.h>
275
276 #ifdef __MINGW32_VERSION
277 /*
278 * MinGW does not yet include all the needed definitions for CryptoAPI, so
279 * define here whatever extra is needed.
280 */
281 #define CERT_SYSTEM_STORE_CURRENT_USER (1 << 16)
282 #define CERT_STORE_READONLY_FLAG 0x00008000
283 #define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000
284
285 #endif /* __MINGW32_VERSION */
286
287
288 struct cryptoapi_rsa_data {
289 const CERT_CONTEXT *cert;
290 HCRYPTPROV crypt_prov;
291 DWORD key_spec;
292 BOOL free_crypt_prov;
293 };
294
295
cryptoapi_error(const char * msg)296 static void cryptoapi_error(const char *msg)
297 {
298 wpa_printf(MSG_INFO, "CryptoAPI: %s; err=%u",
299 msg, (unsigned int) GetLastError());
300 }
301
302
cryptoapi_rsa_pub_enc(int flen,const unsigned char * from,unsigned char * to,RSA * rsa,int padding)303 static int cryptoapi_rsa_pub_enc(int flen, const unsigned char *from,
304 unsigned char *to, RSA *rsa, int padding)
305 {
306 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
307 return 0;
308 }
309
310
cryptoapi_rsa_pub_dec(int flen,const unsigned char * from,unsigned char * to,RSA * rsa,int padding)311 static int cryptoapi_rsa_pub_dec(int flen, const unsigned char *from,
312 unsigned char *to, RSA *rsa, int padding)
313 {
314 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
315 return 0;
316 }
317
318
cryptoapi_rsa_priv_enc(int flen,const unsigned char * from,unsigned char * to,RSA * rsa,int padding)319 static int cryptoapi_rsa_priv_enc(int flen, const unsigned char *from,
320 unsigned char *to, RSA *rsa, int padding)
321 {
322 struct cryptoapi_rsa_data *priv =
323 (struct cryptoapi_rsa_data *) rsa->meth->app_data;
324 HCRYPTHASH hash;
325 DWORD hash_size, len, i;
326 unsigned char *buf = NULL;
327 int ret = 0;
328
329 if (priv == NULL) {
330 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
331 ERR_R_PASSED_NULL_PARAMETER);
332 return 0;
333 }
334
335 if (padding != RSA_PKCS1_PADDING) {
336 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
337 RSA_R_UNKNOWN_PADDING_TYPE);
338 return 0;
339 }
340
341 if (flen != 16 /* MD5 */ + 20 /* SHA-1 */) {
342 wpa_printf(MSG_INFO, "%s - only MD5-SHA1 hash supported",
343 __func__);
344 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
345 RSA_R_INVALID_MESSAGE_LENGTH);
346 return 0;
347 }
348
349 if (!CryptCreateHash(priv->crypt_prov, CALG_SSL3_SHAMD5, 0, 0, &hash))
350 {
351 cryptoapi_error("CryptCreateHash failed");
352 return 0;
353 }
354
355 len = sizeof(hash_size);
356 if (!CryptGetHashParam(hash, HP_HASHSIZE, (BYTE *) &hash_size, &len,
357 0)) {
358 cryptoapi_error("CryptGetHashParam failed");
359 goto err;
360 }
361
362 if ((int) hash_size != flen) {
363 wpa_printf(MSG_INFO, "CryptoAPI: Invalid hash size (%u != %d)",
364 (unsigned) hash_size, flen);
365 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
366 RSA_R_INVALID_MESSAGE_LENGTH);
367 goto err;
368 }
369 if (!CryptSetHashParam(hash, HP_HASHVAL, (BYTE * ) from, 0)) {
370 cryptoapi_error("CryptSetHashParam failed");
371 goto err;
372 }
373
374 len = RSA_size(rsa);
375 buf = os_malloc(len);
376 if (buf == NULL) {
377 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_MALLOC_FAILURE);
378 goto err;
379 }
380
381 if (!CryptSignHash(hash, priv->key_spec, NULL, 0, buf, &len)) {
382 cryptoapi_error("CryptSignHash failed");
383 goto err;
384 }
385
386 for (i = 0; i < len; i++)
387 to[i] = buf[len - i - 1];
388 ret = len;
389
390 err:
391 os_free(buf);
392 CryptDestroyHash(hash);
393
394 return ret;
395 }
396
397
cryptoapi_rsa_priv_dec(int flen,const unsigned char * from,unsigned char * to,RSA * rsa,int padding)398 static int cryptoapi_rsa_priv_dec(int flen, const unsigned char *from,
399 unsigned char *to, RSA *rsa, int padding)
400 {
401 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
402 return 0;
403 }
404
405
cryptoapi_free_data(struct cryptoapi_rsa_data * priv)406 static void cryptoapi_free_data(struct cryptoapi_rsa_data *priv)
407 {
408 if (priv == NULL)
409 return;
410 if (priv->crypt_prov && priv->free_crypt_prov)
411 CryptReleaseContext(priv->crypt_prov, 0);
412 if (priv->cert)
413 CertFreeCertificateContext(priv->cert);
414 os_free(priv);
415 }
416
417
cryptoapi_finish(RSA * rsa)418 static int cryptoapi_finish(RSA *rsa)
419 {
420 cryptoapi_free_data((struct cryptoapi_rsa_data *) rsa->meth->app_data);
421 os_free((void *) rsa->meth);
422 rsa->meth = NULL;
423 return 1;
424 }
425
426
cryptoapi_find_cert(const char * name,DWORD store)427 static const CERT_CONTEXT * cryptoapi_find_cert(const char *name, DWORD store)
428 {
429 HCERTSTORE cs;
430 const CERT_CONTEXT *ret = NULL;
431
432 cs = CertOpenStore((LPCSTR) CERT_STORE_PROV_SYSTEM, 0, 0,
433 store | CERT_STORE_OPEN_EXISTING_FLAG |
434 CERT_STORE_READONLY_FLAG, L"MY");
435 if (cs == NULL) {
436 cryptoapi_error("Failed to open 'My system store'");
437 return NULL;
438 }
439
440 if (strncmp(name, "cert://", 7) == 0) {
441 unsigned short wbuf[255];
442 MultiByteToWideChar(CP_ACP, 0, name + 7, -1, wbuf, 255);
443 ret = CertFindCertificateInStore(cs, X509_ASN_ENCODING |
444 PKCS_7_ASN_ENCODING,
445 0, CERT_FIND_SUBJECT_STR,
446 wbuf, NULL);
447 } else if (strncmp(name, "hash://", 7) == 0) {
448 CRYPT_HASH_BLOB blob;
449 int len;
450 const char *hash = name + 7;
451 unsigned char *buf;
452
453 len = os_strlen(hash) / 2;
454 buf = os_malloc(len);
455 if (buf && hexstr2bin(hash, buf, len) == 0) {
456 blob.cbData = len;
457 blob.pbData = buf;
458 ret = CertFindCertificateInStore(cs,
459 X509_ASN_ENCODING |
460 PKCS_7_ASN_ENCODING,
461 0, CERT_FIND_HASH,
462 &blob, NULL);
463 }
464 os_free(buf);
465 }
466
467 CertCloseStore(cs, 0);
468
469 return ret;
470 }
471
472
tls_cryptoapi_cert(SSL * ssl,const char * name)473 static int tls_cryptoapi_cert(SSL *ssl, const char *name)
474 {
475 X509 *cert = NULL;
476 RSA *rsa = NULL, *pub_rsa;
477 struct cryptoapi_rsa_data *priv;
478 RSA_METHOD *rsa_meth;
479
480 if (name == NULL ||
481 (strncmp(name, "cert://", 7) != 0 &&
482 strncmp(name, "hash://", 7) != 0))
483 return -1;
484
485 priv = os_zalloc(sizeof(*priv));
486 rsa_meth = os_zalloc(sizeof(*rsa_meth));
487 if (priv == NULL || rsa_meth == NULL) {
488 wpa_printf(MSG_WARNING, "CryptoAPI: Failed to allocate memory "
489 "for CryptoAPI RSA method");
490 os_free(priv);
491 os_free(rsa_meth);
492 return -1;
493 }
494
495 priv->cert = cryptoapi_find_cert(name, CERT_SYSTEM_STORE_CURRENT_USER);
496 if (priv->cert == NULL) {
497 priv->cert = cryptoapi_find_cert(
498 name, CERT_SYSTEM_STORE_LOCAL_MACHINE);
499 }
500 if (priv->cert == NULL) {
501 wpa_printf(MSG_INFO, "CryptoAPI: Could not find certificate "
502 "'%s'", name);
503 goto err;
504 }
505
506 cert = d2i_X509(NULL,
507 (const unsigned char **) &priv->cert->pbCertEncoded,
508 priv->cert->cbCertEncoded);
509 if (cert == NULL) {
510 wpa_printf(MSG_INFO, "CryptoAPI: Could not process X509 DER "
511 "encoding");
512 goto err;
513 }
514
515 if (!CryptAcquireCertificatePrivateKey(priv->cert,
516 CRYPT_ACQUIRE_COMPARE_KEY_FLAG,
517 NULL, &priv->crypt_prov,
518 &priv->key_spec,
519 &priv->free_crypt_prov)) {
520 cryptoapi_error("Failed to acquire a private key for the "
521 "certificate");
522 goto err;
523 }
524
525 rsa_meth->name = "Microsoft CryptoAPI RSA Method";
526 rsa_meth->rsa_pub_enc = cryptoapi_rsa_pub_enc;
527 rsa_meth->rsa_pub_dec = cryptoapi_rsa_pub_dec;
528 rsa_meth->rsa_priv_enc = cryptoapi_rsa_priv_enc;
529 rsa_meth->rsa_priv_dec = cryptoapi_rsa_priv_dec;
530 rsa_meth->finish = cryptoapi_finish;
531 rsa_meth->flags = RSA_METHOD_FLAG_NO_CHECK;
532 rsa_meth->app_data = (char *) priv;
533
534 rsa = RSA_new();
535 if (rsa == NULL) {
536 SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE,
537 ERR_R_MALLOC_FAILURE);
538 goto err;
539 }
540
541 if (!SSL_use_certificate(ssl, cert)) {
542 RSA_free(rsa);
543 rsa = NULL;
544 goto err;
545 }
546 pub_rsa = cert->cert_info->key->pkey->pkey.rsa;
547 X509_free(cert);
548 cert = NULL;
549
550 rsa->n = BN_dup(pub_rsa->n);
551 rsa->e = BN_dup(pub_rsa->e);
552 if (!RSA_set_method(rsa, rsa_meth))
553 goto err;
554
555 if (!SSL_use_RSAPrivateKey(ssl, rsa))
556 goto err;
557 RSA_free(rsa);
558
559 return 0;
560
561 err:
562 if (cert)
563 X509_free(cert);
564 if (rsa)
565 RSA_free(rsa);
566 else {
567 os_free(rsa_meth);
568 cryptoapi_free_data(priv);
569 }
570 return -1;
571 }
572
573
tls_cryptoapi_ca_cert(SSL_CTX * ssl_ctx,SSL * ssl,const char * name)574 static int tls_cryptoapi_ca_cert(SSL_CTX *ssl_ctx, SSL *ssl, const char *name)
575 {
576 HCERTSTORE cs;
577 PCCERT_CONTEXT ctx = NULL;
578 X509 *cert;
579 char buf[128];
580 const char *store;
581 #ifdef UNICODE
582 WCHAR *wstore;
583 #endif /* UNICODE */
584
585 if (name == NULL || strncmp(name, "cert_store://", 13) != 0)
586 return -1;
587
588 store = name + 13;
589 #ifdef UNICODE
590 wstore = os_malloc((os_strlen(store) + 1) * sizeof(WCHAR));
591 if (wstore == NULL)
592 return -1;
593 wsprintf(wstore, L"%S", store);
594 cs = CertOpenSystemStore(0, wstore);
595 os_free(wstore);
596 #else /* UNICODE */
597 cs = CertOpenSystemStore(0, store);
598 #endif /* UNICODE */
599 if (cs == NULL) {
600 wpa_printf(MSG_DEBUG, "%s: failed to open system cert store "
601 "'%s': error=%d", __func__, store,
602 (int) GetLastError());
603 return -1;
604 }
605
606 while ((ctx = CertEnumCertificatesInStore(cs, ctx))) {
607 cert = d2i_X509(NULL,
608 (const unsigned char **) &ctx->pbCertEncoded,
609 ctx->cbCertEncoded);
610 if (cert == NULL) {
611 wpa_printf(MSG_INFO, "CryptoAPI: Could not process "
612 "X509 DER encoding for CA cert");
613 continue;
614 }
615
616 X509_NAME_oneline(X509_get_subject_name(cert), buf,
617 sizeof(buf));
618 wpa_printf(MSG_DEBUG, "OpenSSL: Loaded CA certificate for "
619 "system certificate store: subject='%s'", buf);
620
621 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
622 tls_show_errors(MSG_WARNING, __func__,
623 "Failed to add ca_cert to OpenSSL "
624 "certificate store");
625 }
626
627 X509_free(cert);
628 }
629
630 if (!CertCloseStore(cs, 0)) {
631 wpa_printf(MSG_DEBUG, "%s: failed to close system cert store "
632 "'%s': error=%d", __func__, name + 13,
633 (int) GetLastError());
634 }
635
636 return 0;
637 }
638
639
640 #else /* CONFIG_NATIVE_WINDOWS */
641
tls_cryptoapi_cert(SSL * ssl,const char * name)642 static int tls_cryptoapi_cert(SSL *ssl, const char *name)
643 {
644 return -1;
645 }
646
647 #endif /* CONFIG_NATIVE_WINDOWS */
648
649
ssl_info_cb(const SSL * ssl,int where,int ret)650 static void ssl_info_cb(const SSL *ssl, int where, int ret)
651 {
652 const char *str;
653 int w;
654
655 wpa_printf(MSG_DEBUG, "SSL: (where=0x%x ret=0x%x)", where, ret);
656 w = where & ~SSL_ST_MASK;
657 if (w & SSL_ST_CONNECT)
658 str = "SSL_connect";
659 else if (w & SSL_ST_ACCEPT)
660 str = "SSL_accept";
661 else
662 str = "undefined";
663
664 if (where & SSL_CB_LOOP) {
665 wpa_printf(MSG_DEBUG, "SSL: %s:%s",
666 str, SSL_state_string_long(ssl));
667 } else if (where & SSL_CB_ALERT) {
668 struct tls_connection *conn = SSL_get_app_data((SSL *) ssl);
669 wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s",
670 where & SSL_CB_READ ?
671 "read (remote end reported an error)" :
672 "write (local SSL3 detected an error)",
673 SSL_alert_type_string_long(ret),
674 SSL_alert_desc_string_long(ret));
675 if ((ret >> 8) == SSL3_AL_FATAL) {
676 if (where & SSL_CB_READ)
677 conn->read_alerts++;
678 else
679 conn->write_alerts++;
680 }
681 if (conn->context->event_cb != NULL) {
682 union tls_event_data ev;
683 struct tls_context *context = conn->context;
684 os_memset(&ev, 0, sizeof(ev));
685 ev.alert.is_local = !(where & SSL_CB_READ);
686 ev.alert.type = SSL_alert_type_string_long(ret);
687 ev.alert.description = SSL_alert_desc_string_long(ret);
688 context->event_cb(context->cb_ctx, TLS_ALERT, &ev);
689 }
690 } else if (where & SSL_CB_EXIT && ret <= 0) {
691 wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s",
692 str, ret == 0 ? "failed" : "error",
693 SSL_state_string_long(ssl));
694 }
695 }
696
697
698 #ifndef OPENSSL_NO_ENGINE
699 /**
700 * tls_engine_load_dynamic_generic - load any openssl engine
701 * @pre: an array of commands and values that load an engine initialized
702 * in the engine specific function
703 * @post: an array of commands and values that initialize an already loaded
704 * engine (or %NULL if not required)
705 * @id: the engine id of the engine to load (only required if post is not %NULL
706 *
707 * This function is a generic function that loads any openssl engine.
708 *
709 * Returns: 0 on success, -1 on failure
710 */
tls_engine_load_dynamic_generic(const char * pre[],const char * post[],const char * id)711 static int tls_engine_load_dynamic_generic(const char *pre[],
712 const char *post[], const char *id)
713 {
714 ENGINE *engine;
715 const char *dynamic_id = "dynamic";
716
717 engine = ENGINE_by_id(id);
718 if (engine) {
719 ENGINE_free(engine);
720 wpa_printf(MSG_DEBUG, "ENGINE: engine '%s' is already "
721 "available", id);
722 return 0;
723 }
724 ERR_clear_error();
725
726 engine = ENGINE_by_id(dynamic_id);
727 if (engine == NULL) {
728 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
729 dynamic_id,
730 ERR_error_string(ERR_get_error(), NULL));
731 return -1;
732 }
733
734 /* Perform the pre commands. This will load the engine. */
735 while (pre && pre[0]) {
736 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", pre[0], pre[1]);
737 if (ENGINE_ctrl_cmd_string(engine, pre[0], pre[1], 0) == 0) {
738 wpa_printf(MSG_INFO, "ENGINE: ctrl cmd_string failed: "
739 "%s %s [%s]", pre[0], pre[1],
740 ERR_error_string(ERR_get_error(), NULL));
741 ENGINE_free(engine);
742 return -1;
743 }
744 pre += 2;
745 }
746
747 /*
748 * Free the reference to the "dynamic" engine. The loaded engine can
749 * now be looked up using ENGINE_by_id().
750 */
751 ENGINE_free(engine);
752
753 engine = ENGINE_by_id(id);
754 if (engine == NULL) {
755 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
756 id, ERR_error_string(ERR_get_error(), NULL));
757 return -1;
758 }
759
760 while (post && post[0]) {
761 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", post[0], post[1]);
762 if (ENGINE_ctrl_cmd_string(engine, post[0], post[1], 0) == 0) {
763 wpa_printf(MSG_DEBUG, "ENGINE: ctrl cmd_string failed:"
764 " %s %s [%s]", post[0], post[1],
765 ERR_error_string(ERR_get_error(), NULL));
766 ENGINE_remove(engine);
767 ENGINE_free(engine);
768 return -1;
769 }
770 post += 2;
771 }
772 ENGINE_free(engine);
773
774 return 0;
775 }
776
777
778 /**
779 * tls_engine_load_dynamic_pkcs11 - load the pkcs11 engine provided by opensc
780 * @pkcs11_so_path: pksc11_so_path from the configuration
781 * @pcks11_module_path: pkcs11_module_path from the configuration
782 */
tls_engine_load_dynamic_pkcs11(const char * pkcs11_so_path,const char * pkcs11_module_path)783 static int tls_engine_load_dynamic_pkcs11(const char *pkcs11_so_path,
784 const char *pkcs11_module_path)
785 {
786 char *engine_id = "pkcs11";
787 const char *pre_cmd[] = {
788 "SO_PATH", NULL /* pkcs11_so_path */,
789 "ID", NULL /* engine_id */,
790 "LIST_ADD", "1",
791 /* "NO_VCHECK", "1", */
792 "LOAD", NULL,
793 NULL, NULL
794 };
795 const char *post_cmd[] = {
796 "MODULE_PATH", NULL /* pkcs11_module_path */,
797 NULL, NULL
798 };
799
800 if (!pkcs11_so_path)
801 return 0;
802
803 pre_cmd[1] = pkcs11_so_path;
804 pre_cmd[3] = engine_id;
805 if (pkcs11_module_path)
806 post_cmd[1] = pkcs11_module_path;
807 else
808 post_cmd[0] = NULL;
809
810 wpa_printf(MSG_DEBUG, "ENGINE: Loading pkcs11 Engine from %s",
811 pkcs11_so_path);
812
813 return tls_engine_load_dynamic_generic(pre_cmd, post_cmd, engine_id);
814 }
815
816
817 /**
818 * tls_engine_load_dynamic_opensc - load the opensc engine provided by opensc
819 * @opensc_so_path: opensc_so_path from the configuration
820 */
tls_engine_load_dynamic_opensc(const char * opensc_so_path)821 static int tls_engine_load_dynamic_opensc(const char *opensc_so_path)
822 {
823 char *engine_id = "opensc";
824 const char *pre_cmd[] = {
825 "SO_PATH", NULL /* opensc_so_path */,
826 "ID", NULL /* engine_id */,
827 "LIST_ADD", "1",
828 "LOAD", NULL,
829 NULL, NULL
830 };
831
832 if (!opensc_so_path)
833 return 0;
834
835 pre_cmd[1] = opensc_so_path;
836 pre_cmd[3] = engine_id;
837
838 wpa_printf(MSG_DEBUG, "ENGINE: Loading OpenSC Engine from %s",
839 opensc_so_path);
840
841 return tls_engine_load_dynamic_generic(pre_cmd, NULL, engine_id);
842 }
843 #endif /* OPENSSL_NO_ENGINE */
844
845
remove_session_cb(SSL_CTX * ctx,SSL_SESSION * sess)846 static void remove_session_cb(SSL_CTX *ctx, SSL_SESSION *sess)
847 {
848 struct wpabuf *buf;
849
850 if (tls_ex_idx_session < 0)
851 return;
852 buf = SSL_SESSION_get_ex_data(sess, tls_ex_idx_session);
853 if (!buf)
854 return;
855 wpa_printf(MSG_DEBUG,
856 "OpenSSL: Free application session data %p (sess %p)",
857 buf, sess);
858 wpabuf_free(buf);
859
860 SSL_SESSION_set_ex_data(sess, tls_ex_idx_session, NULL);
861 }
862
863
tls_init(const struct tls_config * conf)864 void * tls_init(const struct tls_config *conf)
865 {
866 struct tls_data *data;
867 SSL_CTX *ssl;
868 struct tls_context *context;
869 const char *ciphers;
870
871 if (tls_openssl_ref_count == 0) {
872 tls_global = context = tls_context_new(conf);
873 if (context == NULL)
874 return NULL;
875 #ifdef CONFIG_FIPS
876 #ifdef OPENSSL_FIPS
877 if (conf && conf->fips_mode) {
878 static int fips_enabled = 0;
879
880 if (!fips_enabled && !FIPS_mode_set(1)) {
881 wpa_printf(MSG_ERROR, "Failed to enable FIPS "
882 "mode");
883 ERR_load_crypto_strings();
884 ERR_print_errors_fp(stderr);
885 os_free(tls_global);
886 tls_global = NULL;
887 return NULL;
888 } else {
889 wpa_printf(MSG_INFO, "Running in FIPS mode");
890 fips_enabled = 1;
891 }
892 }
893 #else /* OPENSSL_FIPS */
894 if (conf && conf->fips_mode) {
895 wpa_printf(MSG_ERROR, "FIPS mode requested, but not "
896 "supported");
897 os_free(tls_global);
898 tls_global = NULL;
899 return NULL;
900 }
901 #endif /* OPENSSL_FIPS */
902 #endif /* CONFIG_FIPS */
903 #if OPENSSL_VERSION_NUMBER < 0x10100000L
904 SSL_load_error_strings();
905 SSL_library_init();
906 #ifndef OPENSSL_NO_SHA256
907 EVP_add_digest(EVP_sha256());
908 #endif /* OPENSSL_NO_SHA256 */
909 /* TODO: if /dev/urandom is available, PRNG is seeded
910 * automatically. If this is not the case, random data should
911 * be added here. */
912
913 #ifdef PKCS12_FUNCS
914 #ifndef OPENSSL_NO_RC2
915 /*
916 * 40-bit RC2 is commonly used in PKCS#12 files, so enable it.
917 * This is enabled by PKCS12_PBE_add() in OpenSSL 0.9.8
918 * versions, but it looks like OpenSSL 1.0.0 does not do that
919 * anymore.
920 */
921 EVP_add_cipher(EVP_rc2_40_cbc());
922 #endif /* OPENSSL_NO_RC2 */
923 PKCS12_PBE_add();
924 #endif /* PKCS12_FUNCS */
925 #endif /* < 1.1.0 */
926 } else {
927 context = tls_context_new(conf);
928 if (context == NULL)
929 return NULL;
930 }
931 tls_openssl_ref_count++;
932
933 data = os_zalloc(sizeof(*data));
934 if (data)
935 ssl = SSL_CTX_new(SSLv23_method());
936 else
937 ssl = NULL;
938 if (ssl == NULL) {
939 tls_openssl_ref_count--;
940 if (context != tls_global)
941 os_free(context);
942 if (tls_openssl_ref_count == 0) {
943 os_free(tls_global);
944 tls_global = NULL;
945 }
946 os_free(data);
947 return NULL;
948 }
949 data->ssl = ssl;
950 if (conf)
951 data->tls_session_lifetime = conf->tls_session_lifetime;
952
953 SSL_CTX_set_options(ssl, SSL_OP_NO_SSLv2);
954 SSL_CTX_set_options(ssl, SSL_OP_NO_SSLv3);
955
956 SSL_CTX_set_info_callback(ssl, ssl_info_cb);
957 SSL_CTX_set_app_data(ssl, context);
958 if (data->tls_session_lifetime > 0) {
959 SSL_CTX_set_quiet_shutdown(ssl, 1);
960 /*
961 * Set default context here. In practice, this will be replaced
962 * by the per-EAP method context in tls_connection_set_verify().
963 */
964 SSL_CTX_set_session_id_context(ssl, (u8 *) "hostapd", 7);
965 SSL_CTX_set_session_cache_mode(ssl, SSL_SESS_CACHE_SERVER);
966 SSL_CTX_set_timeout(ssl, data->tls_session_lifetime);
967 SSL_CTX_sess_set_remove_cb(ssl, remove_session_cb);
968 } else {
969 SSL_CTX_set_session_cache_mode(ssl, SSL_SESS_CACHE_OFF);
970 }
971
972 if (tls_ex_idx_session < 0) {
973 tls_ex_idx_session = SSL_SESSION_get_ex_new_index(
974 0, NULL, NULL, NULL, NULL);
975 if (tls_ex_idx_session < 0) {
976 tls_deinit(data);
977 return NULL;
978 }
979 }
980
981 #ifndef OPENSSL_NO_ENGINE
982 wpa_printf(MSG_DEBUG, "ENGINE: Loading dynamic engine");
983 ERR_load_ENGINE_strings();
984 ENGINE_load_dynamic();
985
986 if (conf &&
987 (conf->opensc_engine_path || conf->pkcs11_engine_path ||
988 conf->pkcs11_module_path)) {
989 if (tls_engine_load_dynamic_opensc(conf->opensc_engine_path) ||
990 tls_engine_load_dynamic_pkcs11(conf->pkcs11_engine_path,
991 conf->pkcs11_module_path)) {
992 tls_deinit(data);
993 return NULL;
994 }
995 }
996 #endif /* OPENSSL_NO_ENGINE */
997
998 if (conf && conf->openssl_ciphers)
999 ciphers = conf->openssl_ciphers;
1000 else
1001 ciphers = "DEFAULT:!EXP:!LOW";
1002 if (SSL_CTX_set_cipher_list(ssl, ciphers) != 1) {
1003 wpa_printf(MSG_ERROR,
1004 "OpenSSL: Failed to set cipher string '%s'",
1005 ciphers);
1006 tls_deinit(data);
1007 return NULL;
1008 }
1009
1010 return data;
1011 }
1012
1013
tls_deinit(void * ssl_ctx)1014 void tls_deinit(void *ssl_ctx)
1015 {
1016 struct tls_data *data = ssl_ctx;
1017 SSL_CTX *ssl = data->ssl;
1018 struct tls_context *context = SSL_CTX_get_app_data(ssl);
1019 if (context != tls_global)
1020 os_free(context);
1021 if (data->tls_session_lifetime > 0)
1022 SSL_CTX_flush_sessions(ssl, 0);
1023 SSL_CTX_free(ssl);
1024
1025 tls_openssl_ref_count--;
1026 if (tls_openssl_ref_count == 0) {
1027 #if OPENSSL_VERSION_NUMBER < 0x10100000L
1028 #ifndef OPENSSL_NO_ENGINE
1029 ENGINE_cleanup();
1030 #endif /* OPENSSL_NO_ENGINE */
1031 CRYPTO_cleanup_all_ex_data();
1032 ERR_remove_thread_state(NULL);
1033 ERR_free_strings();
1034 EVP_cleanup();
1035 #endif /* < 1.1.0 */
1036 os_free(tls_global->ocsp_stapling_response);
1037 tls_global->ocsp_stapling_response = NULL;
1038 os_free(tls_global);
1039 tls_global = NULL;
1040 }
1041
1042 os_free(data);
1043 }
1044
1045
1046 #ifndef OPENSSL_NO_ENGINE
1047
1048 /* Cryptoki return values */
1049 #define CKR_PIN_INCORRECT 0x000000a0
1050 #define CKR_PIN_INVALID 0x000000a1
1051 #define CKR_PIN_LEN_RANGE 0x000000a2
1052
1053 /* libp11 */
1054 #define ERR_LIB_PKCS11 ERR_LIB_USER
1055
tls_is_pin_error(unsigned int err)1056 static int tls_is_pin_error(unsigned int err)
1057 {
1058 return ERR_GET_LIB(err) == ERR_LIB_PKCS11 &&
1059 (ERR_GET_REASON(err) == CKR_PIN_INCORRECT ||
1060 ERR_GET_REASON(err) == CKR_PIN_INVALID ||
1061 ERR_GET_REASON(err) == CKR_PIN_LEN_RANGE);
1062 }
1063
1064 #endif /* OPENSSL_NO_ENGINE */
1065
1066
1067 #ifdef ANDROID
1068 /* EVP_PKEY_from_keystore comes from system/security/keystore-engine. */
1069 EVP_PKEY * EVP_PKEY_from_keystore(const char *key_id);
1070 #endif /* ANDROID */
1071
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)1072 static int tls_engine_init(struct tls_connection *conn, const char *engine_id,
1073 const char *pin, const char *key_id,
1074 const char *cert_id, const char *ca_cert_id)
1075 {
1076 #if defined(ANDROID) && defined(OPENSSL_IS_BORINGSSL)
1077 #if !defined(OPENSSL_NO_ENGINE)
1078 #error "This code depends on OPENSSL_NO_ENGINE being defined by BoringSSL."
1079 #endif
1080 if (!key_id)
1081 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
1082 conn->engine = NULL;
1083 conn->private_key = EVP_PKEY_from_keystore(key_id);
1084 if (!conn->private_key) {
1085 wpa_printf(MSG_ERROR,
1086 "ENGINE: cannot load private key with id '%s' [%s]",
1087 key_id,
1088 ERR_error_string(ERR_get_error(), NULL));
1089 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
1090 }
1091 #endif /* ANDROID && OPENSSL_IS_BORINGSSL */
1092
1093 #ifndef OPENSSL_NO_ENGINE
1094 int ret = -1;
1095 if (engine_id == NULL) {
1096 wpa_printf(MSG_ERROR, "ENGINE: Engine ID not set");
1097 return -1;
1098 }
1099
1100 ERR_clear_error();
1101 #ifdef ANDROID
1102 ENGINE_load_dynamic();
1103 #endif
1104 conn->engine = ENGINE_by_id(engine_id);
1105 if (!conn->engine) {
1106 wpa_printf(MSG_ERROR, "ENGINE: engine %s not available [%s]",
1107 engine_id, ERR_error_string(ERR_get_error(), NULL));
1108 goto err;
1109 }
1110 if (ENGINE_init(conn->engine) != 1) {
1111 wpa_printf(MSG_ERROR, "ENGINE: engine init failed "
1112 "(engine: %s) [%s]", engine_id,
1113 ERR_error_string(ERR_get_error(), NULL));
1114 goto err;
1115 }
1116 wpa_printf(MSG_DEBUG, "ENGINE: engine initialized");
1117
1118 #ifndef ANDROID
1119 if (pin && ENGINE_ctrl_cmd_string(conn->engine, "PIN", pin, 0) == 0) {
1120 wpa_printf(MSG_ERROR, "ENGINE: cannot set pin [%s]",
1121 ERR_error_string(ERR_get_error(), NULL));
1122 goto err;
1123 }
1124 #endif
1125 if (key_id) {
1126 /*
1127 * Ensure that the ENGINE does not attempt to use the OpenSSL
1128 * UI system to obtain a PIN, if we didn't provide one.
1129 */
1130 struct {
1131 const void *password;
1132 const char *prompt_info;
1133 } key_cb = { "", NULL };
1134
1135 /* load private key first in-case PIN is required for cert */
1136 conn->private_key = ENGINE_load_private_key(conn->engine,
1137 key_id, NULL,
1138 &key_cb);
1139 if (!conn->private_key) {
1140 unsigned long err = ERR_get_error();
1141
1142 wpa_printf(MSG_ERROR,
1143 "ENGINE: cannot load private key with id '%s' [%s]",
1144 key_id,
1145 ERR_error_string(err, NULL));
1146 if (tls_is_pin_error(err))
1147 ret = TLS_SET_PARAMS_ENGINE_PRV_BAD_PIN;
1148 else
1149 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
1150 goto err;
1151 }
1152 }
1153
1154 /* handle a certificate and/or CA certificate */
1155 if (cert_id || ca_cert_id) {
1156 const char *cmd_name = "LOAD_CERT_CTRL";
1157
1158 /* test if the engine supports a LOAD_CERT_CTRL */
1159 if (!ENGINE_ctrl(conn->engine, ENGINE_CTRL_GET_CMD_FROM_NAME,
1160 0, (void *)cmd_name, NULL)) {
1161 wpa_printf(MSG_ERROR, "ENGINE: engine does not support"
1162 " loading certificates");
1163 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
1164 goto err;
1165 }
1166 }
1167
1168 return 0;
1169
1170 err:
1171 if (conn->engine) {
1172 ENGINE_free(conn->engine);
1173 conn->engine = NULL;
1174 }
1175
1176 if (conn->private_key) {
1177 EVP_PKEY_free(conn->private_key);
1178 conn->private_key = NULL;
1179 }
1180
1181 return ret;
1182 #else /* OPENSSL_NO_ENGINE */
1183 return 0;
1184 #endif /* OPENSSL_NO_ENGINE */
1185 }
1186
1187
tls_engine_deinit(struct tls_connection * conn)1188 static void tls_engine_deinit(struct tls_connection *conn)
1189 {
1190 #if defined(ANDROID) || !defined(OPENSSL_NO_ENGINE)
1191 wpa_printf(MSG_DEBUG, "ENGINE: engine deinit");
1192 if (conn->private_key) {
1193 EVP_PKEY_free(conn->private_key);
1194 conn->private_key = NULL;
1195 }
1196 if (conn->engine) {
1197 #if !defined(OPENSSL_IS_BORINGSSL)
1198 ENGINE_finish(conn->engine);
1199 #endif /* !OPENSSL_IS_BORINGSSL */
1200 conn->engine = NULL;
1201 }
1202 #endif /* ANDROID || !OPENSSL_NO_ENGINE */
1203 }
1204
1205
tls_get_errors(void * ssl_ctx)1206 int tls_get_errors(void *ssl_ctx)
1207 {
1208 int count = 0;
1209 unsigned long err;
1210
1211 while ((err = ERR_get_error())) {
1212 wpa_printf(MSG_INFO, "TLS - SSL error: %s",
1213 ERR_error_string(err, NULL));
1214 count++;
1215 }
1216
1217 return count;
1218 }
1219
1220
openssl_content_type(int content_type)1221 static const char * openssl_content_type(int content_type)
1222 {
1223 switch (content_type) {
1224 case 20:
1225 return "change cipher spec";
1226 case 21:
1227 return "alert";
1228 case 22:
1229 return "handshake";
1230 case 23:
1231 return "application data";
1232 case 24:
1233 return "heartbeat";
1234 case 256:
1235 return "TLS header info"; /* pseudo content type */
1236 default:
1237 return "?";
1238 }
1239 }
1240
1241
openssl_handshake_type(int content_type,const u8 * buf,size_t len)1242 static const char * openssl_handshake_type(int content_type, const u8 *buf,
1243 size_t len)
1244 {
1245 if (content_type != 22 || !buf || len == 0)
1246 return "";
1247 switch (buf[0]) {
1248 case 0:
1249 return "hello request";
1250 case 1:
1251 return "client hello";
1252 case 2:
1253 return "server hello";
1254 case 4:
1255 return "new session ticket";
1256 case 11:
1257 return "certificate";
1258 case 12:
1259 return "server key exchange";
1260 case 13:
1261 return "certificate request";
1262 case 14:
1263 return "server hello done";
1264 case 15:
1265 return "certificate verify";
1266 case 16:
1267 return "client key exchange";
1268 case 20:
1269 return "finished";
1270 case 21:
1271 return "certificate url";
1272 case 22:
1273 return "certificate status";
1274 default:
1275 return "?";
1276 }
1277 }
1278
1279
tls_msg_cb(int write_p,int version,int content_type,const void * buf,size_t len,SSL * ssl,void * arg)1280 static void tls_msg_cb(int write_p, int version, int content_type,
1281 const void *buf, size_t len, SSL *ssl, void *arg)
1282 {
1283 struct tls_connection *conn = arg;
1284 const u8 *pos = buf;
1285
1286 if (write_p == 2) {
1287 wpa_printf(MSG_DEBUG,
1288 "OpenSSL: session ver=0x%x content_type=%d",
1289 version, content_type);
1290 wpa_hexdump_key(MSG_MSGDUMP, "OpenSSL: Data", buf, len);
1291 return;
1292 }
1293
1294 wpa_printf(MSG_DEBUG, "OpenSSL: %s ver=0x%x content_type=%d (%s/%s)",
1295 write_p ? "TX" : "RX", version, content_type,
1296 openssl_content_type(content_type),
1297 openssl_handshake_type(content_type, buf, len));
1298 wpa_hexdump_key(MSG_MSGDUMP, "OpenSSL: Message", buf, len);
1299 if (content_type == 24 && len >= 3 && pos[0] == 1) {
1300 size_t payload_len = WPA_GET_BE16(pos + 1);
1301 if (payload_len + 3 > len) {
1302 wpa_printf(MSG_ERROR, "OpenSSL: Heartbeat attack detected");
1303 conn->invalid_hb_used = 1;
1304 }
1305 }
1306 }
1307
1308
tls_connection_init(void * ssl_ctx)1309 struct tls_connection * tls_connection_init(void *ssl_ctx)
1310 {
1311 struct tls_data *data = ssl_ctx;
1312 SSL_CTX *ssl = data->ssl;
1313 struct tls_connection *conn;
1314 long options;
1315 struct tls_context *context = SSL_CTX_get_app_data(ssl);
1316
1317 conn = os_zalloc(sizeof(*conn));
1318 if (conn == NULL)
1319 return NULL;
1320 conn->ssl_ctx = ssl;
1321 conn->ssl = SSL_new(ssl);
1322 if (conn->ssl == NULL) {
1323 tls_show_errors(MSG_INFO, __func__,
1324 "Failed to initialize new SSL connection");
1325 os_free(conn);
1326 return NULL;
1327 }
1328
1329 conn->context = context;
1330 SSL_set_app_data(conn->ssl, conn);
1331 SSL_set_msg_callback(conn->ssl, tls_msg_cb);
1332 SSL_set_msg_callback_arg(conn->ssl, conn);
1333 options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 |
1334 SSL_OP_SINGLE_DH_USE;
1335 #ifdef SSL_OP_NO_COMPRESSION
1336 options |= SSL_OP_NO_COMPRESSION;
1337 #endif /* SSL_OP_NO_COMPRESSION */
1338 SSL_set_options(conn->ssl, options);
1339
1340 conn->ssl_in = BIO_new(BIO_s_mem());
1341 if (!conn->ssl_in) {
1342 tls_show_errors(MSG_INFO, __func__,
1343 "Failed to create a new BIO for ssl_in");
1344 SSL_free(conn->ssl);
1345 os_free(conn);
1346 return NULL;
1347 }
1348
1349 conn->ssl_out = BIO_new(BIO_s_mem());
1350 if (!conn->ssl_out) {
1351 tls_show_errors(MSG_INFO, __func__,
1352 "Failed to create a new BIO for ssl_out");
1353 SSL_free(conn->ssl);
1354 BIO_free(conn->ssl_in);
1355 os_free(conn);
1356 return NULL;
1357 }
1358
1359 SSL_set_bio(conn->ssl, conn->ssl_in, conn->ssl_out);
1360
1361 return conn;
1362 }
1363
1364
tls_connection_deinit(void * ssl_ctx,struct tls_connection * conn)1365 void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn)
1366 {
1367 if (conn == NULL)
1368 return;
1369 if (conn->success_data) {
1370 /*
1371 * Make sure ssl_clear_bad_session() does not remove this
1372 * session.
1373 */
1374 SSL_set_quiet_shutdown(conn->ssl, 1);
1375 SSL_shutdown(conn->ssl);
1376 }
1377 SSL_free(conn->ssl);
1378 tls_engine_deinit(conn);
1379 os_free(conn->subject_match);
1380 os_free(conn->altsubject_match);
1381 os_free(conn->suffix_match);
1382 os_free(conn->domain_match);
1383 os_free(conn->session_ticket);
1384 os_free(conn);
1385 }
1386
1387
tls_connection_established(void * ssl_ctx,struct tls_connection * conn)1388 int tls_connection_established(void *ssl_ctx, struct tls_connection *conn)
1389 {
1390 return conn ? SSL_is_init_finished(conn->ssl) : 0;
1391 }
1392
1393
tls_connection_shutdown(void * ssl_ctx,struct tls_connection * conn)1394 int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn)
1395 {
1396 if (conn == NULL)
1397 return -1;
1398
1399 /* Shutdown previous TLS connection without notifying the peer
1400 * because the connection was already terminated in practice
1401 * and "close notify" shutdown alert would confuse AS. */
1402 SSL_set_quiet_shutdown(conn->ssl, 1);
1403 SSL_shutdown(conn->ssl);
1404 return SSL_clear(conn->ssl) == 1 ? 0 : -1;
1405 }
1406
1407
tls_match_altsubject_component(X509 * cert,int type,const char * value,size_t len)1408 static int tls_match_altsubject_component(X509 *cert, int type,
1409 const char *value, size_t len)
1410 {
1411 GENERAL_NAME *gen;
1412 void *ext;
1413 int found = 0;
1414 stack_index_t i;
1415
1416 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
1417
1418 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
1419 gen = sk_GENERAL_NAME_value(ext, i);
1420 if (gen->type != type)
1421 continue;
1422 if (os_strlen((char *) gen->d.ia5->data) == len &&
1423 os_memcmp(value, gen->d.ia5->data, len) == 0)
1424 found++;
1425 }
1426
1427 sk_GENERAL_NAME_pop_free(ext, GENERAL_NAME_free);
1428
1429 return found;
1430 }
1431
1432
tls_match_altsubject(X509 * cert,const char * match)1433 static int tls_match_altsubject(X509 *cert, const char *match)
1434 {
1435 int type;
1436 const char *pos, *end;
1437 size_t len;
1438
1439 pos = match;
1440 do {
1441 if (os_strncmp(pos, "EMAIL:", 6) == 0) {
1442 type = GEN_EMAIL;
1443 pos += 6;
1444 } else if (os_strncmp(pos, "DNS:", 4) == 0) {
1445 type = GEN_DNS;
1446 pos += 4;
1447 } else if (os_strncmp(pos, "URI:", 4) == 0) {
1448 type = GEN_URI;
1449 pos += 4;
1450 } else {
1451 wpa_printf(MSG_INFO, "TLS: Invalid altSubjectName "
1452 "match '%s'", pos);
1453 return 0;
1454 }
1455 end = os_strchr(pos, ';');
1456 while (end) {
1457 if (os_strncmp(end + 1, "EMAIL:", 6) == 0 ||
1458 os_strncmp(end + 1, "DNS:", 4) == 0 ||
1459 os_strncmp(end + 1, "URI:", 4) == 0)
1460 break;
1461 end = os_strchr(end + 1, ';');
1462 }
1463 if (end)
1464 len = end - pos;
1465 else
1466 len = os_strlen(pos);
1467 if (tls_match_altsubject_component(cert, type, pos, len) > 0)
1468 return 1;
1469 pos = end + 1;
1470 } while (end);
1471
1472 return 0;
1473 }
1474
1475
1476 #ifndef CONFIG_NATIVE_WINDOWS
domain_suffix_match(const u8 * val,size_t len,const char * match,int full)1477 static int domain_suffix_match(const u8 *val, size_t len, const char *match,
1478 int full)
1479 {
1480 size_t i, match_len;
1481
1482 /* Check for embedded nuls that could mess up suffix matching */
1483 for (i = 0; i < len; i++) {
1484 if (val[i] == '\0') {
1485 wpa_printf(MSG_DEBUG, "TLS: Embedded null in a string - reject");
1486 return 0;
1487 }
1488 }
1489
1490 match_len = os_strlen(match);
1491 if (match_len > len || (full && match_len != len))
1492 return 0;
1493
1494 if (os_strncasecmp((const char *) val + len - match_len, match,
1495 match_len) != 0)
1496 return 0; /* no match */
1497
1498 if (match_len == len)
1499 return 1; /* exact match */
1500
1501 if (val[len - match_len - 1] == '.')
1502 return 1; /* full label match completes suffix match */
1503
1504 wpa_printf(MSG_DEBUG, "TLS: Reject due to incomplete label match");
1505 return 0;
1506 }
1507 #endif /* CONFIG_NATIVE_WINDOWS */
1508
1509
tls_match_suffix(X509 * cert,const char * match,int full)1510 static int tls_match_suffix(X509 *cert, const char *match, int full)
1511 {
1512 #ifdef CONFIG_NATIVE_WINDOWS
1513 /* wincrypt.h has conflicting X509_NAME definition */
1514 return -1;
1515 #else /* CONFIG_NATIVE_WINDOWS */
1516 GENERAL_NAME *gen;
1517 void *ext;
1518 int i;
1519 stack_index_t j;
1520 int dns_name = 0;
1521 X509_NAME *name;
1522
1523 wpa_printf(MSG_DEBUG, "TLS: Match domain against %s%s",
1524 full ? "": "suffix ", match);
1525
1526 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
1527
1528 for (j = 0; ext && j < sk_GENERAL_NAME_num(ext); j++) {
1529 gen = sk_GENERAL_NAME_value(ext, j);
1530 if (gen->type != GEN_DNS)
1531 continue;
1532 dns_name++;
1533 wpa_hexdump_ascii(MSG_DEBUG, "TLS: Certificate dNSName",
1534 gen->d.dNSName->data,
1535 gen->d.dNSName->length);
1536 if (domain_suffix_match(gen->d.dNSName->data,
1537 gen->d.dNSName->length, match, full) ==
1538 1) {
1539 wpa_printf(MSG_DEBUG, "TLS: %s in dNSName found",
1540 full ? "Match" : "Suffix match");
1541 sk_GENERAL_NAME_pop_free(ext, GENERAL_NAME_free);
1542 return 1;
1543 }
1544 }
1545 sk_GENERAL_NAME_pop_free(ext, GENERAL_NAME_free);
1546
1547 if (dns_name) {
1548 wpa_printf(MSG_DEBUG, "TLS: None of the dNSName(s) matched");
1549 return 0;
1550 }
1551
1552 name = X509_get_subject_name(cert);
1553 i = -1;
1554 for (;;) {
1555 X509_NAME_ENTRY *e;
1556 ASN1_STRING *cn;
1557
1558 i = X509_NAME_get_index_by_NID(name, NID_commonName, i);
1559 if (i == -1)
1560 break;
1561 e = X509_NAME_get_entry(name, i);
1562 if (e == NULL)
1563 continue;
1564 cn = X509_NAME_ENTRY_get_data(e);
1565 if (cn == NULL)
1566 continue;
1567 wpa_hexdump_ascii(MSG_DEBUG, "TLS: Certificate commonName",
1568 cn->data, cn->length);
1569 if (domain_suffix_match(cn->data, cn->length, match, full) == 1)
1570 {
1571 wpa_printf(MSG_DEBUG, "TLS: %s in commonName found",
1572 full ? "Match" : "Suffix match");
1573 return 1;
1574 }
1575 }
1576
1577 wpa_printf(MSG_DEBUG, "TLS: No CommonName %smatch found",
1578 full ? "": "suffix ");
1579 return 0;
1580 #endif /* CONFIG_NATIVE_WINDOWS */
1581 }
1582
1583
openssl_tls_fail_reason(int err)1584 static enum tls_fail_reason openssl_tls_fail_reason(int err)
1585 {
1586 switch (err) {
1587 case X509_V_ERR_CERT_REVOKED:
1588 return TLS_FAIL_REVOKED;
1589 case X509_V_ERR_CERT_NOT_YET_VALID:
1590 case X509_V_ERR_CRL_NOT_YET_VALID:
1591 return TLS_FAIL_NOT_YET_VALID;
1592 case X509_V_ERR_CERT_HAS_EXPIRED:
1593 case X509_V_ERR_CRL_HAS_EXPIRED:
1594 return TLS_FAIL_EXPIRED;
1595 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
1596 case X509_V_ERR_UNABLE_TO_GET_CRL:
1597 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
1598 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
1599 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
1600 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
1601 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
1602 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
1603 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
1604 case X509_V_ERR_INVALID_CA:
1605 return TLS_FAIL_UNTRUSTED;
1606 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
1607 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
1608 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
1609 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
1610 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
1611 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
1612 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
1613 case X509_V_ERR_CERT_UNTRUSTED:
1614 case X509_V_ERR_CERT_REJECTED:
1615 return TLS_FAIL_BAD_CERTIFICATE;
1616 default:
1617 return TLS_FAIL_UNSPECIFIED;
1618 }
1619 }
1620
1621
get_x509_cert(X509 * cert)1622 static struct wpabuf * get_x509_cert(X509 *cert)
1623 {
1624 struct wpabuf *buf;
1625 u8 *tmp;
1626
1627 int cert_len = i2d_X509(cert, NULL);
1628 if (cert_len <= 0)
1629 return NULL;
1630
1631 buf = wpabuf_alloc(cert_len);
1632 if (buf == NULL)
1633 return NULL;
1634
1635 tmp = wpabuf_put(buf, cert_len);
1636 i2d_X509(cert, &tmp);
1637 return buf;
1638 }
1639
1640
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)1641 static void openssl_tls_fail_event(struct tls_connection *conn,
1642 X509 *err_cert, int err, int depth,
1643 const char *subject, const char *err_str,
1644 enum tls_fail_reason reason)
1645 {
1646 union tls_event_data ev;
1647 struct wpabuf *cert = NULL;
1648 struct tls_context *context = conn->context;
1649
1650 if (context->event_cb == NULL)
1651 return;
1652
1653 cert = get_x509_cert(err_cert);
1654 os_memset(&ev, 0, sizeof(ev));
1655 ev.cert_fail.reason = reason != TLS_FAIL_UNSPECIFIED ?
1656 reason : openssl_tls_fail_reason(err);
1657 ev.cert_fail.depth = depth;
1658 ev.cert_fail.subject = subject;
1659 ev.cert_fail.reason_txt = err_str;
1660 ev.cert_fail.cert = cert;
1661 context->event_cb(context->cb_ctx, TLS_CERT_CHAIN_FAILURE, &ev);
1662 wpabuf_free(cert);
1663 }
1664
1665
openssl_tls_cert_event(struct tls_connection * conn,X509 * err_cert,int depth,const char * subject)1666 static void openssl_tls_cert_event(struct tls_connection *conn,
1667 X509 *err_cert, int depth,
1668 const char *subject)
1669 {
1670 struct wpabuf *cert = NULL;
1671 union tls_event_data ev;
1672 struct tls_context *context = conn->context;
1673 char *altsubject[TLS_MAX_ALT_SUBJECT];
1674 int alt, num_altsubject = 0;
1675 GENERAL_NAME *gen;
1676 void *ext;
1677 stack_index_t i;
1678 #ifdef CONFIG_SHA256
1679 u8 hash[32];
1680 #endif /* CONFIG_SHA256 */
1681
1682 if (context->event_cb == NULL)
1683 return;
1684
1685 os_memset(&ev, 0, sizeof(ev));
1686 if (conn->cert_probe || (conn->flags & TLS_CONN_EXT_CERT_CHECK) ||
1687 context->cert_in_cb) {
1688 cert = get_x509_cert(err_cert);
1689 ev.peer_cert.cert = cert;
1690 }
1691 #ifdef CONFIG_SHA256
1692 if (cert) {
1693 const u8 *addr[1];
1694 size_t len[1];
1695 addr[0] = wpabuf_head(cert);
1696 len[0] = wpabuf_len(cert);
1697 if (sha256_vector(1, addr, len, hash) == 0) {
1698 ev.peer_cert.hash = hash;
1699 ev.peer_cert.hash_len = sizeof(hash);
1700 }
1701 }
1702 #endif /* CONFIG_SHA256 */
1703 ev.peer_cert.depth = depth;
1704 ev.peer_cert.subject = subject;
1705
1706 ext = X509_get_ext_d2i(err_cert, NID_subject_alt_name, NULL, NULL);
1707 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
1708 char *pos;
1709
1710 if (num_altsubject == TLS_MAX_ALT_SUBJECT)
1711 break;
1712 gen = sk_GENERAL_NAME_value(ext, i);
1713 if (gen->type != GEN_EMAIL &&
1714 gen->type != GEN_DNS &&
1715 gen->type != GEN_URI)
1716 continue;
1717
1718 pos = os_malloc(10 + gen->d.ia5->length + 1);
1719 if (pos == NULL)
1720 break;
1721 altsubject[num_altsubject++] = pos;
1722
1723 switch (gen->type) {
1724 case GEN_EMAIL:
1725 os_memcpy(pos, "EMAIL:", 6);
1726 pos += 6;
1727 break;
1728 case GEN_DNS:
1729 os_memcpy(pos, "DNS:", 4);
1730 pos += 4;
1731 break;
1732 case GEN_URI:
1733 os_memcpy(pos, "URI:", 4);
1734 pos += 4;
1735 break;
1736 }
1737
1738 os_memcpy(pos, gen->d.ia5->data, gen->d.ia5->length);
1739 pos += gen->d.ia5->length;
1740 *pos = '\0';
1741 }
1742 sk_GENERAL_NAME_pop_free(ext, GENERAL_NAME_free);
1743
1744 for (alt = 0; alt < num_altsubject; alt++)
1745 ev.peer_cert.altsubject[alt] = altsubject[alt];
1746 ev.peer_cert.num_altsubject = num_altsubject;
1747
1748 context->event_cb(context->cb_ctx, TLS_PEER_CERTIFICATE, &ev);
1749 wpabuf_free(cert);
1750 for (alt = 0; alt < num_altsubject; alt++)
1751 os_free(altsubject[alt]);
1752 }
1753
1754
tls_verify_cb(int preverify_ok,X509_STORE_CTX * x509_ctx)1755 static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
1756 {
1757 char buf[256];
1758 X509 *err_cert;
1759 int err, depth;
1760 SSL *ssl;
1761 struct tls_connection *conn;
1762 struct tls_context *context;
1763 char *match, *altmatch, *suffix_match, *domain_match;
1764 const char *err_str;
1765
1766 err_cert = X509_STORE_CTX_get_current_cert(x509_ctx);
1767 if (!err_cert)
1768 return 0;
1769
1770 err = X509_STORE_CTX_get_error(x509_ctx);
1771 depth = X509_STORE_CTX_get_error_depth(x509_ctx);
1772 ssl = X509_STORE_CTX_get_ex_data(x509_ctx,
1773 SSL_get_ex_data_X509_STORE_CTX_idx());
1774 X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf));
1775
1776 conn = SSL_get_app_data(ssl);
1777 if (conn == NULL)
1778 return 0;
1779
1780 if (depth == 0)
1781 conn->peer_cert = err_cert;
1782 else if (depth == 1)
1783 conn->peer_issuer = err_cert;
1784 else if (depth == 2)
1785 conn->peer_issuer_issuer = err_cert;
1786
1787 context = conn->context;
1788 match = conn->subject_match;
1789 altmatch = conn->altsubject_match;
1790 suffix_match = conn->suffix_match;
1791 domain_match = conn->domain_match;
1792
1793 if (!preverify_ok && !conn->ca_cert_verify)
1794 preverify_ok = 1;
1795 if (!preverify_ok && depth > 0 && conn->server_cert_only)
1796 preverify_ok = 1;
1797 if (!preverify_ok && (conn->flags & TLS_CONN_DISABLE_TIME_CHECKS) &&
1798 (err == X509_V_ERR_CERT_HAS_EXPIRED ||
1799 err == X509_V_ERR_CERT_NOT_YET_VALID)) {
1800 wpa_printf(MSG_DEBUG, "OpenSSL: Ignore certificate validity "
1801 "time mismatch");
1802 preverify_ok = 1;
1803 }
1804
1805 err_str = X509_verify_cert_error_string(err);
1806
1807 #ifdef CONFIG_SHA256
1808 /*
1809 * Do not require preverify_ok so we can explicity allow otherwise
1810 * invalid pinned server certificates.
1811 */
1812 if (depth == 0 && conn->server_cert_only) {
1813 struct wpabuf *cert;
1814 cert = get_x509_cert(err_cert);
1815 if (!cert) {
1816 wpa_printf(MSG_DEBUG, "OpenSSL: Could not fetch "
1817 "server certificate data");
1818 preverify_ok = 0;
1819 } else {
1820 u8 hash[32];
1821 const u8 *addr[1];
1822 size_t len[1];
1823 addr[0] = wpabuf_head(cert);
1824 len[0] = wpabuf_len(cert);
1825 if (sha256_vector(1, addr, len, hash) < 0 ||
1826 os_memcmp(conn->srv_cert_hash, hash, 32) != 0) {
1827 err_str = "Server certificate mismatch";
1828 err = X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN;
1829 preverify_ok = 0;
1830 } else if (!preverify_ok) {
1831 /*
1832 * Certificate matches pinned certificate, allow
1833 * regardless of other problems.
1834 */
1835 wpa_printf(MSG_DEBUG,
1836 "OpenSSL: Ignore validation issues for a pinned server certificate");
1837 preverify_ok = 1;
1838 }
1839 wpabuf_free(cert);
1840 }
1841 }
1842 #endif /* CONFIG_SHA256 */
1843
1844 if (!preverify_ok) {
1845 wpa_printf(MSG_WARNING, "TLS: Certificate verification failed,"
1846 " error %d (%s) depth %d for '%s'", err, err_str,
1847 depth, buf);
1848 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1849 err_str, TLS_FAIL_UNSPECIFIED);
1850 return preverify_ok;
1851 }
1852
1853 wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - preverify_ok=%d "
1854 "err=%d (%s) ca_cert_verify=%d depth=%d buf='%s'",
1855 preverify_ok, err, err_str,
1856 conn->ca_cert_verify, depth, buf);
1857 if (depth == 0 && match && os_strstr(buf, match) == NULL) {
1858 wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not "
1859 "match with '%s'", buf, match);
1860 preverify_ok = 0;
1861 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1862 "Subject mismatch",
1863 TLS_FAIL_SUBJECT_MISMATCH);
1864 } else if (depth == 0 && altmatch &&
1865 !tls_match_altsubject(err_cert, altmatch)) {
1866 wpa_printf(MSG_WARNING, "TLS: altSubjectName match "
1867 "'%s' not found", altmatch);
1868 preverify_ok = 0;
1869 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1870 "AltSubject mismatch",
1871 TLS_FAIL_ALTSUBJECT_MISMATCH);
1872 } else if (depth == 0 && suffix_match &&
1873 !tls_match_suffix(err_cert, suffix_match, 0)) {
1874 wpa_printf(MSG_WARNING, "TLS: Domain suffix match '%s' not found",
1875 suffix_match);
1876 preverify_ok = 0;
1877 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1878 "Domain suffix mismatch",
1879 TLS_FAIL_DOMAIN_SUFFIX_MISMATCH);
1880 } else if (depth == 0 && domain_match &&
1881 !tls_match_suffix(err_cert, domain_match, 1)) {
1882 wpa_printf(MSG_WARNING, "TLS: Domain match '%s' not found",
1883 domain_match);
1884 preverify_ok = 0;
1885 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1886 "Domain mismatch",
1887 TLS_FAIL_DOMAIN_MISMATCH);
1888 } else
1889 openssl_tls_cert_event(conn, err_cert, depth, buf);
1890
1891 if (conn->cert_probe && preverify_ok && depth == 0) {
1892 wpa_printf(MSG_DEBUG, "OpenSSL: Reject server certificate "
1893 "on probe-only run");
1894 preverify_ok = 0;
1895 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1896 "Server certificate chain probe",
1897 TLS_FAIL_SERVER_CHAIN_PROBE);
1898 }
1899
1900 #ifdef OPENSSL_IS_BORINGSSL
1901 if (depth == 0 && (conn->flags & TLS_CONN_REQUEST_OCSP) &&
1902 preverify_ok) {
1903 enum ocsp_result res;
1904
1905 res = check_ocsp_resp(conn->ssl_ctx, conn->ssl, err_cert,
1906 conn->peer_issuer,
1907 conn->peer_issuer_issuer);
1908 if (res == OCSP_REVOKED) {
1909 preverify_ok = 0;
1910 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1911 "certificate revoked",
1912 TLS_FAIL_REVOKED);
1913 if (err == X509_V_OK)
1914 X509_STORE_CTX_set_error(
1915 x509_ctx, X509_V_ERR_CERT_REVOKED);
1916 } else if (res != OCSP_GOOD &&
1917 (conn->flags & TLS_CONN_REQUIRE_OCSP)) {
1918 preverify_ok = 0;
1919 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1920 "bad certificate status response",
1921 TLS_FAIL_UNSPECIFIED);
1922 }
1923 }
1924 #endif /* OPENSSL_IS_BORINGSSL */
1925
1926 if (depth == 0 && preverify_ok && context->event_cb != NULL)
1927 context->event_cb(context->cb_ctx,
1928 TLS_CERT_CHAIN_SUCCESS, NULL);
1929
1930 return preverify_ok;
1931 }
1932
1933
1934 #ifndef OPENSSL_NO_STDIO
tls_load_ca_der(struct tls_data * data,const char * ca_cert)1935 static int tls_load_ca_der(struct tls_data *data, const char *ca_cert)
1936 {
1937 SSL_CTX *ssl_ctx = data->ssl;
1938 X509_LOOKUP *lookup;
1939 int ret = 0;
1940
1941 lookup = X509_STORE_add_lookup(SSL_CTX_get_cert_store(ssl_ctx),
1942 X509_LOOKUP_file());
1943 if (lookup == NULL) {
1944 tls_show_errors(MSG_WARNING, __func__,
1945 "Failed add lookup for X509 store");
1946 return -1;
1947 }
1948
1949 if (!X509_LOOKUP_load_file(lookup, ca_cert, X509_FILETYPE_ASN1)) {
1950 unsigned long err = ERR_peek_error();
1951 tls_show_errors(MSG_WARNING, __func__,
1952 "Failed load CA in DER format");
1953 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1954 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1955 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1956 "cert already in hash table error",
1957 __func__);
1958 } else
1959 ret = -1;
1960 }
1961
1962 return ret;
1963 }
1964 #endif /* OPENSSL_NO_STDIO */
1965
1966
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)1967 static int tls_connection_ca_cert(struct tls_data *data,
1968 struct tls_connection *conn,
1969 const char *ca_cert, const u8 *ca_cert_blob,
1970 size_t ca_cert_blob_len, const char *ca_path)
1971 {
1972 SSL_CTX *ssl_ctx = data->ssl;
1973 X509_STORE *store;
1974
1975 /*
1976 * Remove previously configured trusted CA certificates before adding
1977 * new ones.
1978 */
1979 store = X509_STORE_new();
1980 if (store == NULL) {
1981 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
1982 "certificate store", __func__);
1983 return -1;
1984 }
1985 SSL_CTX_set_cert_store(ssl_ctx, store);
1986
1987 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1988 conn->ca_cert_verify = 1;
1989
1990 if (ca_cert && os_strncmp(ca_cert, "probe://", 8) == 0) {
1991 wpa_printf(MSG_DEBUG, "OpenSSL: Probe for server certificate "
1992 "chain");
1993 conn->cert_probe = 1;
1994 conn->ca_cert_verify = 0;
1995 return 0;
1996 }
1997
1998 if (ca_cert && os_strncmp(ca_cert, "hash://", 7) == 0) {
1999 #ifdef CONFIG_SHA256
2000 const char *pos = ca_cert + 7;
2001 if (os_strncmp(pos, "server/sha256/", 14) != 0) {
2002 wpa_printf(MSG_DEBUG, "OpenSSL: Unsupported ca_cert "
2003 "hash value '%s'", ca_cert);
2004 return -1;
2005 }
2006 pos += 14;
2007 if (os_strlen(pos) != 32 * 2) {
2008 wpa_printf(MSG_DEBUG, "OpenSSL: Unexpected SHA256 "
2009 "hash length in ca_cert '%s'", ca_cert);
2010 return -1;
2011 }
2012 if (hexstr2bin(pos, conn->srv_cert_hash, 32) < 0) {
2013 wpa_printf(MSG_DEBUG, "OpenSSL: Invalid SHA256 hash "
2014 "value in ca_cert '%s'", ca_cert);
2015 return -1;
2016 }
2017 conn->server_cert_only = 1;
2018 wpa_printf(MSG_DEBUG, "OpenSSL: Checking only server "
2019 "certificate match");
2020 return 0;
2021 #else /* CONFIG_SHA256 */
2022 wpa_printf(MSG_INFO, "No SHA256 included in the build - "
2023 "cannot validate server certificate hash");
2024 return -1;
2025 #endif /* CONFIG_SHA256 */
2026 }
2027
2028 if (ca_cert_blob) {
2029 X509 *cert = d2i_X509(NULL,
2030 (const unsigned char **) &ca_cert_blob,
2031 ca_cert_blob_len);
2032 if (cert == NULL) {
2033 tls_show_errors(MSG_WARNING, __func__,
2034 "Failed to parse ca_cert_blob");
2035 return -1;
2036 }
2037
2038 if (!X509_STORE_add_cert(SSL_CTX_get_cert_store(ssl_ctx),
2039 cert)) {
2040 unsigned long err = ERR_peek_error();
2041 tls_show_errors(MSG_WARNING, __func__,
2042 "Failed to add ca_cert_blob to "
2043 "certificate store");
2044 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
2045 ERR_GET_REASON(err) ==
2046 X509_R_CERT_ALREADY_IN_HASH_TABLE) {
2047 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
2048 "cert already in hash table error",
2049 __func__);
2050 } else {
2051 X509_free(cert);
2052 return -1;
2053 }
2054 }
2055 X509_free(cert);
2056 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob "
2057 "to certificate store", __func__);
2058 return 0;
2059 }
2060
2061 #ifdef ANDROID
2062 /* Single alias */
2063 if (ca_cert && os_strncmp("keystore://", ca_cert, 11) == 0) {
2064 if (tls_add_ca_from_keystore(ssl_ctx->cert_store,
2065 &ca_cert[11]) < 0)
2066 return -1;
2067 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
2068 return 0;
2069 }
2070
2071 /* Multiple aliases separated by space */
2072 if (ca_cert && os_strncmp("keystores://", ca_cert, 12) == 0) {
2073 char *aliases = os_strdup(&ca_cert[12]);
2074 const char *delim = " ";
2075 int rc = 0;
2076 char *savedptr;
2077 char *alias;
2078
2079 if (!aliases)
2080 return -1;
2081 alias = strtok_r(aliases, delim, &savedptr);
2082 for (; alias; alias = strtok_r(NULL, delim, &savedptr)) {
2083 if (tls_add_ca_from_keystore_encoded(
2084 ssl_ctx->cert_store, alias)) {
2085 wpa_printf(MSG_WARNING,
2086 "OpenSSL: %s - Failed to add ca_cert %s from keystore",
2087 __func__, alias);
2088 rc = -1;
2089 break;
2090 }
2091 }
2092 os_free(aliases);
2093 if (rc)
2094 return rc;
2095
2096 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
2097 return 0;
2098 }
2099 #endif /* ANDROID */
2100
2101 #ifdef CONFIG_NATIVE_WINDOWS
2102 if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) ==
2103 0) {
2104 wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from "
2105 "system certificate store");
2106 return 0;
2107 }
2108 #endif /* CONFIG_NATIVE_WINDOWS */
2109
2110 if (ca_cert || ca_path) {
2111 #ifndef OPENSSL_NO_STDIO
2112 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) !=
2113 1) {
2114 tls_show_errors(MSG_WARNING, __func__,
2115 "Failed to load root certificates");
2116 if (ca_cert &&
2117 tls_load_ca_der(data, ca_cert) == 0) {
2118 wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded "
2119 "DER format CA certificate",
2120 __func__);
2121 } else
2122 return -1;
2123 } else {
2124 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
2125 "certificate(s) loaded");
2126 tls_get_errors(data);
2127 }
2128 #else /* OPENSSL_NO_STDIO */
2129 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
2130 __func__);
2131 return -1;
2132 #endif /* OPENSSL_NO_STDIO */
2133 } else {
2134 /* No ca_cert configured - do not try to verify server
2135 * certificate */
2136 conn->ca_cert_verify = 0;
2137 }
2138
2139 return 0;
2140 }
2141
2142
tls_global_ca_cert(struct tls_data * data,const char * ca_cert)2143 static int tls_global_ca_cert(struct tls_data *data, const char *ca_cert)
2144 {
2145 SSL_CTX *ssl_ctx = data->ssl;
2146
2147 if (ca_cert) {
2148 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1)
2149 {
2150 tls_show_errors(MSG_WARNING, __func__,
2151 "Failed to load root certificates");
2152 return -1;
2153 }
2154
2155 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
2156 "certificate(s) loaded");
2157
2158 #ifndef OPENSSL_NO_STDIO
2159 /* Add the same CAs to the client certificate requests */
2160 SSL_CTX_set_client_CA_list(ssl_ctx,
2161 SSL_load_client_CA_file(ca_cert));
2162 #endif /* OPENSSL_NO_STDIO */
2163 }
2164
2165 return 0;
2166 }
2167
2168
tls_global_set_verify(void * ssl_ctx,int check_crl)2169 int tls_global_set_verify(void *ssl_ctx, int check_crl)
2170 {
2171 int flags;
2172
2173 if (check_crl) {
2174 struct tls_data *data = ssl_ctx;
2175 X509_STORE *cs = SSL_CTX_get_cert_store(data->ssl);
2176 if (cs == NULL) {
2177 tls_show_errors(MSG_INFO, __func__, "Failed to get "
2178 "certificate store when enabling "
2179 "check_crl");
2180 return -1;
2181 }
2182 flags = X509_V_FLAG_CRL_CHECK;
2183 if (check_crl == 2)
2184 flags |= X509_V_FLAG_CRL_CHECK_ALL;
2185 X509_STORE_set_flags(cs, flags);
2186 }
2187 return 0;
2188 }
2189
2190
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)2191 static int tls_connection_set_subject_match(struct tls_connection *conn,
2192 const char *subject_match,
2193 const char *altsubject_match,
2194 const char *suffix_match,
2195 const char *domain_match)
2196 {
2197 os_free(conn->subject_match);
2198 conn->subject_match = NULL;
2199 if (subject_match) {
2200 conn->subject_match = os_strdup(subject_match);
2201 if (conn->subject_match == NULL)
2202 return -1;
2203 }
2204
2205 os_free(conn->altsubject_match);
2206 conn->altsubject_match = NULL;
2207 if (altsubject_match) {
2208 conn->altsubject_match = os_strdup(altsubject_match);
2209 if (conn->altsubject_match == NULL)
2210 return -1;
2211 }
2212
2213 os_free(conn->suffix_match);
2214 conn->suffix_match = NULL;
2215 if (suffix_match) {
2216 conn->suffix_match = os_strdup(suffix_match);
2217 if (conn->suffix_match == NULL)
2218 return -1;
2219 }
2220
2221 os_free(conn->domain_match);
2222 conn->domain_match = NULL;
2223 if (domain_match) {
2224 conn->domain_match = os_strdup(domain_match);
2225 if (conn->domain_match == NULL)
2226 return -1;
2227 }
2228
2229 return 0;
2230 }
2231
2232
tls_set_conn_flags(SSL * ssl,unsigned int flags)2233 static void tls_set_conn_flags(SSL *ssl, unsigned int flags)
2234 {
2235 #ifdef SSL_OP_NO_TICKET
2236 if (flags & TLS_CONN_DISABLE_SESSION_TICKET)
2237 SSL_set_options(ssl, SSL_OP_NO_TICKET);
2238 #ifdef SSL_clear_options
2239 else
2240 SSL_clear_options(ssl, SSL_OP_NO_TICKET);
2241 #endif /* SSL_clear_options */
2242 #endif /* SSL_OP_NO_TICKET */
2243
2244 #ifdef SSL_OP_NO_TLSv1
2245 if (flags & TLS_CONN_DISABLE_TLSv1_0)
2246 SSL_set_options(ssl, SSL_OP_NO_TLSv1);
2247 else
2248 SSL_clear_options(ssl, SSL_OP_NO_TLSv1);
2249 #endif /* SSL_OP_NO_TLSv1 */
2250 #ifdef SSL_OP_NO_TLSv1_1
2251 if (flags & TLS_CONN_DISABLE_TLSv1_1)
2252 SSL_set_options(ssl, SSL_OP_NO_TLSv1_1);
2253 else
2254 SSL_clear_options(ssl, SSL_OP_NO_TLSv1_1);
2255 #endif /* SSL_OP_NO_TLSv1_1 */
2256 #ifdef SSL_OP_NO_TLSv1_2
2257 if (flags & TLS_CONN_DISABLE_TLSv1_2)
2258 SSL_set_options(ssl, SSL_OP_NO_TLSv1_2);
2259 else
2260 SSL_clear_options(ssl, SSL_OP_NO_TLSv1_2);
2261 #endif /* SSL_OP_NO_TLSv1_2 */
2262 }
2263
2264
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)2265 int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn,
2266 int verify_peer, unsigned int flags,
2267 const u8 *session_ctx, size_t session_ctx_len)
2268 {
2269 static int counter = 0;
2270 struct tls_data *data = ssl_ctx;
2271
2272 if (conn == NULL)
2273 return -1;
2274
2275 if (verify_peer) {
2276 conn->ca_cert_verify = 1;
2277 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER |
2278 SSL_VERIFY_FAIL_IF_NO_PEER_CERT |
2279 SSL_VERIFY_CLIENT_ONCE, tls_verify_cb);
2280 } else {
2281 conn->ca_cert_verify = 0;
2282 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
2283 }
2284
2285 tls_set_conn_flags(conn->ssl, flags);
2286 conn->flags = flags;
2287
2288 SSL_set_accept_state(conn->ssl);
2289
2290 if (data->tls_session_lifetime == 0) {
2291 /*
2292 * Set session id context to a unique value to make sure
2293 * session resumption cannot be used either through session
2294 * caching or TLS ticket extension.
2295 */
2296 counter++;
2297 SSL_set_session_id_context(conn->ssl,
2298 (const unsigned char *) &counter,
2299 sizeof(counter));
2300 } else if (session_ctx) {
2301 SSL_set_session_id_context(conn->ssl, session_ctx,
2302 session_ctx_len);
2303 }
2304
2305 return 0;
2306 }
2307
2308
tls_connection_client_cert(struct tls_connection * conn,const char * client_cert,const u8 * client_cert_blob,size_t client_cert_blob_len)2309 static int tls_connection_client_cert(struct tls_connection *conn,
2310 const char *client_cert,
2311 const u8 *client_cert_blob,
2312 size_t client_cert_blob_len)
2313 {
2314 if (client_cert == NULL && client_cert_blob == NULL)
2315 return 0;
2316
2317 #ifdef PKCS12_FUNCS
2318 #if OPENSSL_VERSION_NUMBER < 0x10002000L
2319 /*
2320 * Clear previously set extra chain certificates, if any, from PKCS#12
2321 * processing in tls_parse_pkcs12() to allow OpenSSL to build a new
2322 * chain properly.
2323 */
2324 SSL_CTX_clear_extra_chain_certs(conn->ssl_ctx);
2325 #endif /* OPENSSL_VERSION_NUMBER < 0x10002000L */
2326 #endif /* PKCS12_FUNCS */
2327
2328 if (client_cert_blob &&
2329 SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob,
2330 client_cert_blob_len) == 1) {
2331 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> "
2332 "OK");
2333 return 0;
2334 } else if (client_cert_blob) {
2335 tls_show_errors(MSG_DEBUG, __func__,
2336 "SSL_use_certificate_ASN1 failed");
2337 }
2338
2339 if (client_cert == NULL)
2340 return -1;
2341
2342 #ifdef ANDROID
2343 if (os_strncmp("keystore://", client_cert, 11) == 0) {
2344 BIO *bio = BIO_from_keystore(&client_cert[11]);
2345 X509 *x509 = NULL;
2346 int ret = -1;
2347 if (bio) {
2348 x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL);
2349 BIO_free(bio);
2350 }
2351 if (x509) {
2352 if (SSL_use_certificate(conn->ssl, x509) == 1)
2353 ret = 0;
2354 X509_free(x509);
2355 }
2356 return ret;
2357 }
2358 #endif /* ANDROID */
2359
2360 #ifndef OPENSSL_NO_STDIO
2361 if (SSL_use_certificate_file(conn->ssl, client_cert,
2362 SSL_FILETYPE_ASN1) == 1) {
2363 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)"
2364 " --> OK");
2365 return 0;
2366 }
2367
2368 if (SSL_use_certificate_file(conn->ssl, client_cert,
2369 SSL_FILETYPE_PEM) == 1) {
2370 ERR_clear_error();
2371 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)"
2372 " --> OK");
2373 return 0;
2374 }
2375
2376 tls_show_errors(MSG_DEBUG, __func__,
2377 "SSL_use_certificate_file failed");
2378 #else /* OPENSSL_NO_STDIO */
2379 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
2380 #endif /* OPENSSL_NO_STDIO */
2381
2382 return -1;
2383 }
2384
2385
tls_global_client_cert(struct tls_data * data,const char * client_cert)2386 static int tls_global_client_cert(struct tls_data *data,
2387 const char *client_cert)
2388 {
2389 #ifndef OPENSSL_NO_STDIO
2390 SSL_CTX *ssl_ctx = data->ssl;
2391
2392 if (client_cert == NULL)
2393 return 0;
2394
2395 if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
2396 SSL_FILETYPE_ASN1) != 1 &&
2397 SSL_CTX_use_certificate_chain_file(ssl_ctx, client_cert) != 1 &&
2398 SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
2399 SSL_FILETYPE_PEM) != 1) {
2400 tls_show_errors(MSG_INFO, __func__,
2401 "Failed to load client certificate");
2402 return -1;
2403 }
2404 return 0;
2405 #else /* OPENSSL_NO_STDIO */
2406 if (client_cert == NULL)
2407 return 0;
2408 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
2409 return -1;
2410 #endif /* OPENSSL_NO_STDIO */
2411 }
2412
2413
tls_passwd_cb(char * buf,int size,int rwflag,void * password)2414 static int tls_passwd_cb(char *buf, int size, int rwflag, void *password)
2415 {
2416 if (password == NULL) {
2417 return 0;
2418 }
2419 os_strlcpy(buf, (char *) password, size);
2420 return os_strlen(buf);
2421 }
2422
2423
2424 #ifdef PKCS12_FUNCS
tls_parse_pkcs12(struct tls_data * data,SSL * ssl,PKCS12 * p12,const char * passwd)2425 static int tls_parse_pkcs12(struct tls_data *data, SSL *ssl, PKCS12 *p12,
2426 const char *passwd)
2427 {
2428 EVP_PKEY *pkey;
2429 X509 *cert;
2430 STACK_OF(X509) *certs;
2431 int res = 0;
2432 char buf[256];
2433
2434 pkey = NULL;
2435 cert = NULL;
2436 certs = NULL;
2437 if (!passwd)
2438 passwd = "";
2439 if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) {
2440 tls_show_errors(MSG_DEBUG, __func__,
2441 "Failed to parse PKCS12 file");
2442 PKCS12_free(p12);
2443 return -1;
2444 }
2445 wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data");
2446
2447 if (cert) {
2448 X509_NAME_oneline(X509_get_subject_name(cert), buf,
2449 sizeof(buf));
2450 wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: "
2451 "subject='%s'", buf);
2452 if (ssl) {
2453 if (SSL_use_certificate(ssl, cert) != 1)
2454 res = -1;
2455 } else {
2456 if (SSL_CTX_use_certificate(data->ssl, cert) != 1)
2457 res = -1;
2458 }
2459 X509_free(cert);
2460 }
2461
2462 if (pkey) {
2463 wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12");
2464 if (ssl) {
2465 if (SSL_use_PrivateKey(ssl, pkey) != 1)
2466 res = -1;
2467 } else {
2468 if (SSL_CTX_use_PrivateKey(data->ssl, pkey) != 1)
2469 res = -1;
2470 }
2471 EVP_PKEY_free(pkey);
2472 }
2473
2474 if (certs) {
2475 #if OPENSSL_VERSION_NUMBER >= 0x10002000L && !defined(LIBRESSL_VERSION_NUMBER)
2476 if (ssl)
2477 SSL_clear_chain_certs(ssl);
2478 else
2479 SSL_CTX_clear_chain_certs(data->ssl);
2480 while ((cert = sk_X509_pop(certs)) != NULL) {
2481 X509_NAME_oneline(X509_get_subject_name(cert), buf,
2482 sizeof(buf));
2483 wpa_printf(MSG_DEBUG, "TLS: additional certificate"
2484 " from PKCS12: subject='%s'", buf);
2485 if ((ssl && SSL_add1_chain_cert(ssl, cert) != 1) ||
2486 (!ssl && SSL_CTX_add1_chain_cert(data->ssl,
2487 cert) != 1)) {
2488 tls_show_errors(MSG_DEBUG, __func__,
2489 "Failed to add additional certificate");
2490 res = -1;
2491 X509_free(cert);
2492 break;
2493 }
2494 X509_free(cert);
2495 }
2496 if (!res) {
2497 /* Try to continue anyway */
2498 }
2499 sk_X509_pop_free(certs, X509_free);
2500 #ifndef OPENSSL_IS_BORINGSSL
2501 if (ssl)
2502 res = SSL_build_cert_chain(
2503 ssl,
2504 SSL_BUILD_CHAIN_FLAG_CHECK |
2505 SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR);
2506 else
2507 res = SSL_CTX_build_cert_chain(
2508 data->ssl,
2509 SSL_BUILD_CHAIN_FLAG_CHECK |
2510 SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR);
2511 if (!res) {
2512 tls_show_errors(MSG_DEBUG, __func__,
2513 "Failed to build certificate chain");
2514 } else if (res == 2) {
2515 wpa_printf(MSG_DEBUG,
2516 "TLS: Ignore certificate chain verification error when building chain with PKCS#12 extra certificates");
2517 }
2518 #endif /* OPENSSL_IS_BORINGSSL */
2519 /*
2520 * Try to continue regardless of result since it is possible for
2521 * the extra certificates not to be required.
2522 */
2523 res = 0;
2524 #else /* OPENSSL_VERSION_NUMBER >= 0x10002000L */
2525 SSL_CTX_clear_extra_chain_certs(data->ssl);
2526 while ((cert = sk_X509_pop(certs)) != NULL) {
2527 X509_NAME_oneline(X509_get_subject_name(cert), buf,
2528 sizeof(buf));
2529 wpa_printf(MSG_DEBUG, "TLS: additional certificate"
2530 " from PKCS12: subject='%s'", buf);
2531 /*
2532 * There is no SSL equivalent for the chain cert - so
2533 * always add it to the context...
2534 */
2535 if (SSL_CTX_add_extra_chain_cert(data->ssl, cert) != 1)
2536 {
2537 X509_free(cert);
2538 res = -1;
2539 break;
2540 }
2541 }
2542 sk_X509_pop_free(certs, X509_free);
2543 #endif /* OPENSSL_VERSION_NUMBER >= 0x10002000L */
2544 }
2545
2546 PKCS12_free(p12);
2547
2548 if (res < 0)
2549 tls_get_errors(data);
2550
2551 return res;
2552 }
2553 #endif /* PKCS12_FUNCS */
2554
2555
tls_read_pkcs12(struct tls_data * data,SSL * ssl,const char * private_key,const char * passwd)2556 static int tls_read_pkcs12(struct tls_data *data, SSL *ssl,
2557 const char *private_key, const char *passwd)
2558 {
2559 #ifdef PKCS12_FUNCS
2560 FILE *f;
2561 PKCS12 *p12;
2562
2563 f = fopen(private_key, "rb");
2564 if (f == NULL)
2565 return -1;
2566
2567 p12 = d2i_PKCS12_fp(f, NULL);
2568 fclose(f);
2569
2570 if (p12 == NULL) {
2571 tls_show_errors(MSG_INFO, __func__,
2572 "Failed to use PKCS#12 file");
2573 return -1;
2574 }
2575
2576 return tls_parse_pkcs12(data, ssl, p12, passwd);
2577
2578 #else /* PKCS12_FUNCS */
2579 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read "
2580 "p12/pfx files");
2581 return -1;
2582 #endif /* PKCS12_FUNCS */
2583 }
2584
2585
tls_read_pkcs12_blob(struct tls_data * data,SSL * ssl,const u8 * blob,size_t len,const char * passwd)2586 static int tls_read_pkcs12_blob(struct tls_data *data, SSL *ssl,
2587 const u8 *blob, size_t len, const char *passwd)
2588 {
2589 #ifdef PKCS12_FUNCS
2590 PKCS12 *p12;
2591
2592 p12 = d2i_PKCS12(NULL, (const unsigned char **) &blob, len);
2593 if (p12 == NULL) {
2594 tls_show_errors(MSG_INFO, __func__,
2595 "Failed to use PKCS#12 blob");
2596 return -1;
2597 }
2598
2599 return tls_parse_pkcs12(data, ssl, p12, passwd);
2600
2601 #else /* PKCS12_FUNCS */
2602 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse "
2603 "p12/pfx blobs");
2604 return -1;
2605 #endif /* PKCS12_FUNCS */
2606 }
2607
2608
2609 #ifndef OPENSSL_NO_ENGINE
tls_engine_get_cert(struct tls_connection * conn,const char * cert_id,X509 ** cert)2610 static int tls_engine_get_cert(struct tls_connection *conn,
2611 const char *cert_id,
2612 X509 **cert)
2613 {
2614 /* this runs after the private key is loaded so no PIN is required */
2615 struct {
2616 const char *cert_id;
2617 X509 *cert;
2618 } params;
2619 params.cert_id = cert_id;
2620 params.cert = NULL;
2621
2622 if (!ENGINE_ctrl_cmd(conn->engine, "LOAD_CERT_CTRL",
2623 0, ¶ms, NULL, 1)) {
2624 unsigned long err = ERR_get_error();
2625
2626 wpa_printf(MSG_ERROR, "ENGINE: cannot load client cert with id"
2627 " '%s' [%s]", cert_id,
2628 ERR_error_string(err, NULL));
2629 if (tls_is_pin_error(err))
2630 return TLS_SET_PARAMS_ENGINE_PRV_BAD_PIN;
2631 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
2632 }
2633 if (!params.cert) {
2634 wpa_printf(MSG_ERROR, "ENGINE: did not properly cert with id"
2635 " '%s'", cert_id);
2636 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
2637 }
2638 *cert = params.cert;
2639 return 0;
2640 }
2641 #endif /* OPENSSL_NO_ENGINE */
2642
2643
tls_connection_engine_client_cert(struct tls_connection * conn,const char * cert_id)2644 static int tls_connection_engine_client_cert(struct tls_connection *conn,
2645 const char *cert_id)
2646 {
2647 #ifndef OPENSSL_NO_ENGINE
2648 X509 *cert;
2649
2650 if (tls_engine_get_cert(conn, cert_id, &cert))
2651 return -1;
2652
2653 if (!SSL_use_certificate(conn->ssl, cert)) {
2654 tls_show_errors(MSG_ERROR, __func__,
2655 "SSL_use_certificate failed");
2656 X509_free(cert);
2657 return -1;
2658 }
2659 X509_free(cert);
2660 wpa_printf(MSG_DEBUG, "ENGINE: SSL_use_certificate --> "
2661 "OK");
2662 return 0;
2663
2664 #else /* OPENSSL_NO_ENGINE */
2665 return -1;
2666 #endif /* OPENSSL_NO_ENGINE */
2667 }
2668
2669
tls_connection_engine_ca_cert(struct tls_data * data,struct tls_connection * conn,const char * ca_cert_id)2670 static int tls_connection_engine_ca_cert(struct tls_data *data,
2671 struct tls_connection *conn,
2672 const char *ca_cert_id)
2673 {
2674 #ifndef OPENSSL_NO_ENGINE
2675 X509 *cert;
2676 SSL_CTX *ssl_ctx = data->ssl;
2677 X509_STORE *store;
2678
2679 if (tls_engine_get_cert(conn, ca_cert_id, &cert))
2680 return -1;
2681
2682 /* start off the same as tls_connection_ca_cert */
2683 store = X509_STORE_new();
2684 if (store == NULL) {
2685 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
2686 "certificate store", __func__);
2687 X509_free(cert);
2688 return -1;
2689 }
2690 SSL_CTX_set_cert_store(ssl_ctx, store);
2691 if (!X509_STORE_add_cert(store, cert)) {
2692 unsigned long err = ERR_peek_error();
2693 tls_show_errors(MSG_WARNING, __func__,
2694 "Failed to add CA certificate from engine "
2695 "to certificate store");
2696 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
2697 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
2698 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring cert"
2699 " already in hash table error",
2700 __func__);
2701 } else {
2702 X509_free(cert);
2703 return -1;
2704 }
2705 }
2706 X509_free(cert);
2707 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added CA certificate from engine "
2708 "to certificate store", __func__);
2709 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
2710 conn->ca_cert_verify = 1;
2711
2712 return 0;
2713
2714 #else /* OPENSSL_NO_ENGINE */
2715 return -1;
2716 #endif /* OPENSSL_NO_ENGINE */
2717 }
2718
2719
tls_connection_engine_private_key(struct tls_connection * conn)2720 static int tls_connection_engine_private_key(struct tls_connection *conn)
2721 {
2722 #if defined(ANDROID) || !defined(OPENSSL_NO_ENGINE)
2723 if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) {
2724 tls_show_errors(MSG_ERROR, __func__,
2725 "ENGINE: cannot use private key for TLS");
2726 return -1;
2727 }
2728 if (!SSL_check_private_key(conn->ssl)) {
2729 tls_show_errors(MSG_INFO, __func__,
2730 "Private key failed verification");
2731 return -1;
2732 }
2733 return 0;
2734 #else /* OPENSSL_NO_ENGINE */
2735 wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but "
2736 "engine support was not compiled in");
2737 return -1;
2738 #endif /* OPENSSL_NO_ENGINE */
2739 }
2740
2741
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)2742 static int tls_connection_private_key(struct tls_data *data,
2743 struct tls_connection *conn,
2744 const char *private_key,
2745 const char *private_key_passwd,
2746 const u8 *private_key_blob,
2747 size_t private_key_blob_len)
2748 {
2749 SSL_CTX *ssl_ctx = data->ssl;
2750 char *passwd;
2751 int ok;
2752
2753 if (private_key == NULL && private_key_blob == NULL)
2754 return 0;
2755
2756 if (private_key_passwd) {
2757 passwd = os_strdup(private_key_passwd);
2758 if (passwd == NULL)
2759 return -1;
2760 } else
2761 passwd = NULL;
2762
2763 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
2764 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
2765
2766 ok = 0;
2767 while (private_key_blob) {
2768 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl,
2769 (u8 *) private_key_blob,
2770 private_key_blob_len) == 1) {
2771 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
2772 "ASN1(EVP_PKEY_RSA) --> OK");
2773 ok = 1;
2774 break;
2775 }
2776
2777 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl,
2778 (u8 *) private_key_blob,
2779 private_key_blob_len) == 1) {
2780 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
2781 "ASN1(EVP_PKEY_DSA) --> OK");
2782 ok = 1;
2783 break;
2784 }
2785
2786 if (SSL_use_RSAPrivateKey_ASN1(conn->ssl,
2787 (u8 *) private_key_blob,
2788 private_key_blob_len) == 1) {
2789 wpa_printf(MSG_DEBUG, "OpenSSL: "
2790 "SSL_use_RSAPrivateKey_ASN1 --> OK");
2791 ok = 1;
2792 break;
2793 }
2794
2795 if (tls_read_pkcs12_blob(data, conn->ssl, private_key_blob,
2796 private_key_blob_len, passwd) == 0) {
2797 wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> "
2798 "OK");
2799 ok = 1;
2800 break;
2801 }
2802
2803 break;
2804 }
2805
2806 while (!ok && private_key) {
2807 #ifndef OPENSSL_NO_STDIO
2808 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
2809 SSL_FILETYPE_ASN1) == 1) {
2810 wpa_printf(MSG_DEBUG, "OpenSSL: "
2811 "SSL_use_PrivateKey_File (DER) --> OK");
2812 ok = 1;
2813 break;
2814 }
2815
2816 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
2817 SSL_FILETYPE_PEM) == 1) {
2818 wpa_printf(MSG_DEBUG, "OpenSSL: "
2819 "SSL_use_PrivateKey_File (PEM) --> OK");
2820 ok = 1;
2821 break;
2822 }
2823 #else /* OPENSSL_NO_STDIO */
2824 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
2825 __func__);
2826 #endif /* OPENSSL_NO_STDIO */
2827
2828 if (tls_read_pkcs12(data, conn->ssl, private_key, passwd)
2829 == 0) {
2830 wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file "
2831 "--> OK");
2832 ok = 1;
2833 break;
2834 }
2835
2836 if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) {
2837 wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to "
2838 "access certificate store --> OK");
2839 ok = 1;
2840 break;
2841 }
2842
2843 break;
2844 }
2845
2846 if (!ok) {
2847 tls_show_errors(MSG_INFO, __func__,
2848 "Failed to load private key");
2849 os_free(passwd);
2850 return -1;
2851 }
2852 ERR_clear_error();
2853 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
2854 os_free(passwd);
2855
2856 if (!SSL_check_private_key(conn->ssl)) {
2857 tls_show_errors(MSG_INFO, __func__, "Private key failed "
2858 "verification");
2859 return -1;
2860 }
2861
2862 wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully");
2863 return 0;
2864 }
2865
2866
tls_global_private_key(struct tls_data * data,const char * private_key,const char * private_key_passwd)2867 static int tls_global_private_key(struct tls_data *data,
2868 const char *private_key,
2869 const char *private_key_passwd)
2870 {
2871 SSL_CTX *ssl_ctx = data->ssl;
2872 char *passwd;
2873
2874 if (private_key == NULL)
2875 return 0;
2876
2877 if (private_key_passwd) {
2878 passwd = os_strdup(private_key_passwd);
2879 if (passwd == NULL)
2880 return -1;
2881 } else
2882 passwd = NULL;
2883
2884 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
2885 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
2886 if (
2887 #ifndef OPENSSL_NO_STDIO
2888 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
2889 SSL_FILETYPE_ASN1) != 1 &&
2890 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
2891 SSL_FILETYPE_PEM) != 1 &&
2892 #endif /* OPENSSL_NO_STDIO */
2893 tls_read_pkcs12(data, NULL, private_key, passwd)) {
2894 tls_show_errors(MSG_INFO, __func__,
2895 "Failed to load private key");
2896 os_free(passwd);
2897 ERR_clear_error();
2898 return -1;
2899 }
2900 os_free(passwd);
2901 ERR_clear_error();
2902 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
2903
2904 if (!SSL_CTX_check_private_key(ssl_ctx)) {
2905 tls_show_errors(MSG_INFO, __func__,
2906 "Private key failed verification");
2907 return -1;
2908 }
2909
2910 return 0;
2911 }
2912
2913
tls_connection_dh(struct tls_connection * conn,const char * dh_file)2914 static int tls_connection_dh(struct tls_connection *conn, const char *dh_file)
2915 {
2916 #ifdef OPENSSL_NO_DH
2917 if (dh_file == NULL)
2918 return 0;
2919 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
2920 "dh_file specified");
2921 return -1;
2922 #else /* OPENSSL_NO_DH */
2923 DH *dh;
2924 BIO *bio;
2925
2926 /* TODO: add support for dh_blob */
2927 if (dh_file == NULL)
2928 return 0;
2929 if (conn == NULL)
2930 return -1;
2931
2932 bio = BIO_new_file(dh_file, "r");
2933 if (bio == NULL) {
2934 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
2935 dh_file, ERR_error_string(ERR_get_error(), NULL));
2936 return -1;
2937 }
2938 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
2939 BIO_free(bio);
2940 #ifndef OPENSSL_NO_DSA
2941 while (dh == NULL) {
2942 DSA *dsa;
2943 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
2944 " trying to parse as DSA params", dh_file,
2945 ERR_error_string(ERR_get_error(), NULL));
2946 bio = BIO_new_file(dh_file, "r");
2947 if (bio == NULL)
2948 break;
2949 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
2950 BIO_free(bio);
2951 if (!dsa) {
2952 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
2953 "'%s': %s", dh_file,
2954 ERR_error_string(ERR_get_error(), NULL));
2955 break;
2956 }
2957
2958 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
2959 dh = DSA_dup_DH(dsa);
2960 DSA_free(dsa);
2961 if (dh == NULL) {
2962 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
2963 "params into DH params");
2964 break;
2965 }
2966 break;
2967 }
2968 #endif /* !OPENSSL_NO_DSA */
2969 if (dh == NULL) {
2970 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
2971 "'%s'", dh_file);
2972 return -1;
2973 }
2974
2975 if (SSL_set_tmp_dh(conn->ssl, dh) != 1) {
2976 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
2977 "%s", dh_file,
2978 ERR_error_string(ERR_get_error(), NULL));
2979 DH_free(dh);
2980 return -1;
2981 }
2982 DH_free(dh);
2983 return 0;
2984 #endif /* OPENSSL_NO_DH */
2985 }
2986
2987
tls_global_dh(struct tls_data * data,const char * dh_file)2988 static int tls_global_dh(struct tls_data *data, const char *dh_file)
2989 {
2990 #ifdef OPENSSL_NO_DH
2991 if (dh_file == NULL)
2992 return 0;
2993 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
2994 "dh_file specified");
2995 return -1;
2996 #else /* OPENSSL_NO_DH */
2997 SSL_CTX *ssl_ctx = data->ssl;
2998 DH *dh;
2999 BIO *bio;
3000
3001 /* TODO: add support for dh_blob */
3002 if (dh_file == NULL)
3003 return 0;
3004 if (ssl_ctx == NULL)
3005 return -1;
3006
3007 bio = BIO_new_file(dh_file, "r");
3008 if (bio == NULL) {
3009 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
3010 dh_file, ERR_error_string(ERR_get_error(), NULL));
3011 return -1;
3012 }
3013 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
3014 BIO_free(bio);
3015 #ifndef OPENSSL_NO_DSA
3016 while (dh == NULL) {
3017 DSA *dsa;
3018 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
3019 " trying to parse as DSA params", dh_file,
3020 ERR_error_string(ERR_get_error(), NULL));
3021 bio = BIO_new_file(dh_file, "r");
3022 if (bio == NULL)
3023 break;
3024 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
3025 BIO_free(bio);
3026 if (!dsa) {
3027 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
3028 "'%s': %s", dh_file,
3029 ERR_error_string(ERR_get_error(), NULL));
3030 break;
3031 }
3032
3033 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
3034 dh = DSA_dup_DH(dsa);
3035 DSA_free(dsa);
3036 if (dh == NULL) {
3037 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
3038 "params into DH params");
3039 break;
3040 }
3041 break;
3042 }
3043 #endif /* !OPENSSL_NO_DSA */
3044 if (dh == NULL) {
3045 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
3046 "'%s'", dh_file);
3047 return -1;
3048 }
3049
3050 if (SSL_CTX_set_tmp_dh(ssl_ctx, dh) != 1) {
3051 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
3052 "%s", dh_file,
3053 ERR_error_string(ERR_get_error(), NULL));
3054 DH_free(dh);
3055 return -1;
3056 }
3057 DH_free(dh);
3058 return 0;
3059 #endif /* OPENSSL_NO_DH */
3060 }
3061
3062
tls_connection_get_random(void * ssl_ctx,struct tls_connection * conn,struct tls_random * keys)3063 int tls_connection_get_random(void *ssl_ctx, struct tls_connection *conn,
3064 struct tls_random *keys)
3065 {
3066 SSL *ssl;
3067
3068 if (conn == NULL || keys == NULL)
3069 return -1;
3070 ssl = conn->ssl;
3071 if (ssl == NULL)
3072 return -1;
3073
3074 os_memset(keys, 0, sizeof(*keys));
3075 keys->client_random = conn->client_random;
3076 keys->client_random_len = SSL_get_client_random(
3077 ssl, conn->client_random, sizeof(conn->client_random));
3078 keys->server_random = conn->server_random;
3079 keys->server_random_len = SSL_get_server_random(
3080 ssl, conn->server_random, sizeof(conn->server_random));
3081
3082 return 0;
3083 }
3084
3085
3086 #ifndef CONFIG_FIPS
openssl_get_keyblock_size(SSL * ssl)3087 static int openssl_get_keyblock_size(SSL *ssl)
3088 {
3089 #if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
3090 const EVP_CIPHER *c;
3091 const EVP_MD *h;
3092 int md_size;
3093
3094 if (ssl->enc_read_ctx == NULL || ssl->enc_read_ctx->cipher == NULL ||
3095 ssl->read_hash == NULL)
3096 return -1;
3097
3098 c = ssl->enc_read_ctx->cipher;
3099 h = EVP_MD_CTX_md(ssl->read_hash);
3100 if (h)
3101 md_size = EVP_MD_size(h);
3102 else if (ssl->s3)
3103 md_size = ssl->s3->tmp.new_mac_secret_size;
3104 else
3105 return -1;
3106
3107 wpa_printf(MSG_DEBUG, "OpenSSL: keyblock size: key_len=%d MD_size=%d "
3108 "IV_len=%d", EVP_CIPHER_key_length(c), md_size,
3109 EVP_CIPHER_iv_length(c));
3110 return 2 * (EVP_CIPHER_key_length(c) +
3111 md_size +
3112 EVP_CIPHER_iv_length(c));
3113 #else
3114 const SSL_CIPHER *ssl_cipher;
3115 int cipher, digest;
3116 const EVP_CIPHER *c;
3117 const EVP_MD *h;
3118
3119 ssl_cipher = SSL_get_current_cipher(ssl);
3120 if (!ssl_cipher)
3121 return -1;
3122 cipher = SSL_CIPHER_get_cipher_nid(ssl_cipher);
3123 digest = SSL_CIPHER_get_digest_nid(ssl_cipher);
3124 wpa_printf(MSG_DEBUG, "OpenSSL: cipher nid %d digest nid %d",
3125 cipher, digest);
3126 if (cipher < 0 || digest < 0)
3127 return -1;
3128 c = EVP_get_cipherbynid(cipher);
3129 h = EVP_get_digestbynid(digest);
3130 if (!c || !h)
3131 return -1;
3132
3133 wpa_printf(MSG_DEBUG,
3134 "OpenSSL: keyblock size: key_len=%d MD_size=%d IV_len=%d",
3135 EVP_CIPHER_key_length(c), EVP_MD_size(h),
3136 EVP_CIPHER_iv_length(c));
3137 return 2 * (EVP_CIPHER_key_length(c) + EVP_MD_size(h) +
3138 EVP_CIPHER_iv_length(c));
3139 #endif
3140 }
3141 #endif /* CONFIG_FIPS */
3142
3143
openssl_tls_prf(struct tls_connection * conn,const char * label,int server_random_first,int skip_keyblock,u8 * out,size_t out_len)3144 static int openssl_tls_prf(struct tls_connection *conn,
3145 const char *label, int server_random_first,
3146 int skip_keyblock, u8 *out, size_t out_len)
3147 {
3148 #ifdef CONFIG_FIPS
3149 wpa_printf(MSG_ERROR, "OpenSSL: TLS keys cannot be exported in FIPS "
3150 "mode");
3151 return -1;
3152 #else /* CONFIG_FIPS */
3153 SSL *ssl;
3154 SSL_SESSION *sess;
3155 u8 *rnd;
3156 int ret = -1;
3157 int skip = 0;
3158 u8 *tmp_out = NULL;
3159 u8 *_out = out;
3160 unsigned char client_random[SSL3_RANDOM_SIZE];
3161 unsigned char server_random[SSL3_RANDOM_SIZE];
3162 unsigned char master_key[64];
3163 size_t master_key_len;
3164 const char *ver;
3165
3166 /*
3167 * TLS library did not support key generation, so get the needed TLS
3168 * session parameters and use an internal implementation of TLS PRF to
3169 * derive the key.
3170 */
3171
3172 if (conn == NULL)
3173 return -1;
3174 ssl = conn->ssl;
3175 if (ssl == NULL)
3176 return -1;
3177 ver = SSL_get_version(ssl);
3178 sess = SSL_get_session(ssl);
3179 if (!ver || !sess)
3180 return -1;
3181
3182 if (skip_keyblock) {
3183 skip = openssl_get_keyblock_size(ssl);
3184 if (skip < 0)
3185 return -1;
3186 tmp_out = os_malloc(skip + out_len);
3187 if (!tmp_out)
3188 return -1;
3189 _out = tmp_out;
3190 }
3191
3192 rnd = os_malloc(2 * SSL3_RANDOM_SIZE);
3193 if (!rnd) {
3194 os_free(tmp_out);
3195 return -1;
3196 }
3197
3198 SSL_get_client_random(ssl, client_random, sizeof(client_random));
3199 SSL_get_server_random(ssl, server_random, sizeof(server_random));
3200 master_key_len = SSL_SESSION_get_master_key(sess, master_key,
3201 sizeof(master_key));
3202
3203 if (server_random_first) {
3204 os_memcpy(rnd, server_random, SSL3_RANDOM_SIZE);
3205 os_memcpy(rnd + SSL3_RANDOM_SIZE, client_random,
3206 SSL3_RANDOM_SIZE);
3207 } else {
3208 os_memcpy(rnd, client_random, SSL3_RANDOM_SIZE);
3209 os_memcpy(rnd + SSL3_RANDOM_SIZE, server_random,
3210 SSL3_RANDOM_SIZE);
3211 }
3212
3213 if (os_strcmp(ver, "TLSv1.2") == 0) {
3214 tls_prf_sha256(master_key, master_key_len,
3215 label, rnd, 2 * SSL3_RANDOM_SIZE,
3216 _out, skip + out_len);
3217 ret = 0;
3218 } else if (tls_prf_sha1_md5(master_key, master_key_len,
3219 label, rnd, 2 * SSL3_RANDOM_SIZE,
3220 _out, skip + out_len) == 0) {
3221 ret = 0;
3222 }
3223 os_memset(master_key, 0, sizeof(master_key));
3224 os_free(rnd);
3225 if (ret == 0 && skip_keyblock)
3226 os_memcpy(out, _out + skip, out_len);
3227 bin_clear_free(tmp_out, skip);
3228
3229 return ret;
3230 #endif /* CONFIG_FIPS */
3231 }
3232
3233
tls_connection_prf(void * tls_ctx,struct tls_connection * conn,const char * label,int server_random_first,int skip_keyblock,u8 * out,size_t out_len)3234 int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
3235 const char *label, int server_random_first,
3236 int skip_keyblock, u8 *out, size_t out_len)
3237 {
3238 if (conn == NULL)
3239 return -1;
3240 if (server_random_first || skip_keyblock)
3241 return openssl_tls_prf(conn, label,
3242 server_random_first, skip_keyblock,
3243 out, out_len);
3244 if (SSL_export_keying_material(conn->ssl, out, out_len, label,
3245 os_strlen(label), NULL, 0, 0) == 1) {
3246 wpa_printf(MSG_DEBUG, "OpenSSL: Using internal PRF");
3247 return 0;
3248 }
3249 return openssl_tls_prf(conn, label, server_random_first,
3250 skip_keyblock, out, out_len);
3251 }
3252
3253
3254 static struct wpabuf *
openssl_handshake(struct tls_connection * conn,const struct wpabuf * in_data,int server)3255 openssl_handshake(struct tls_connection *conn, const struct wpabuf *in_data,
3256 int server)
3257 {
3258 int res;
3259 struct wpabuf *out_data;
3260
3261 /*
3262 * Give TLS handshake data from the server (if available) to OpenSSL
3263 * for processing.
3264 */
3265 if (in_data && wpabuf_len(in_data) > 0 &&
3266 BIO_write(conn->ssl_in, wpabuf_head(in_data), wpabuf_len(in_data))
3267 < 0) {
3268 tls_show_errors(MSG_INFO, __func__,
3269 "Handshake failed - BIO_write");
3270 return NULL;
3271 }
3272
3273 /* Initiate TLS handshake or continue the existing handshake */
3274 if (server)
3275 res = SSL_accept(conn->ssl);
3276 else
3277 res = SSL_connect(conn->ssl);
3278 if (res != 1) {
3279 int err = SSL_get_error(conn->ssl, res);
3280 if (err == SSL_ERROR_WANT_READ)
3281 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want "
3282 "more data");
3283 else if (err == SSL_ERROR_WANT_WRITE)
3284 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to "
3285 "write");
3286 else {
3287 tls_show_errors(MSG_INFO, __func__, "SSL_connect");
3288 conn->failed++;
3289 }
3290 }
3291
3292 /* Get the TLS handshake data to be sent to the server */
3293 res = BIO_ctrl_pending(conn->ssl_out);
3294 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
3295 out_data = wpabuf_alloc(res);
3296 if (out_data == NULL) {
3297 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
3298 "handshake output (%d bytes)", res);
3299 if (BIO_reset(conn->ssl_out) < 0) {
3300 tls_show_errors(MSG_INFO, __func__,
3301 "BIO_reset failed");
3302 }
3303 return NULL;
3304 }
3305 res = res == 0 ? 0 : BIO_read(conn->ssl_out, wpabuf_mhead(out_data),
3306 res);
3307 if (res < 0) {
3308 tls_show_errors(MSG_INFO, __func__,
3309 "Handshake failed - BIO_read");
3310 if (BIO_reset(conn->ssl_out) < 0) {
3311 tls_show_errors(MSG_INFO, __func__,
3312 "BIO_reset failed");
3313 }
3314 wpabuf_free(out_data);
3315 return NULL;
3316 }
3317 wpabuf_put(out_data, res);
3318
3319 return out_data;
3320 }
3321
3322
3323 static struct wpabuf *
openssl_get_appl_data(struct tls_connection * conn,size_t max_len)3324 openssl_get_appl_data(struct tls_connection *conn, size_t max_len)
3325 {
3326 struct wpabuf *appl_data;
3327 int res;
3328
3329 appl_data = wpabuf_alloc(max_len + 100);
3330 if (appl_data == NULL)
3331 return NULL;
3332
3333 res = SSL_read(conn->ssl, wpabuf_mhead(appl_data),
3334 wpabuf_size(appl_data));
3335 if (res < 0) {
3336 int err = SSL_get_error(conn->ssl, res);
3337 if (err == SSL_ERROR_WANT_READ ||
3338 err == SSL_ERROR_WANT_WRITE) {
3339 wpa_printf(MSG_DEBUG, "SSL: No Application Data "
3340 "included");
3341 } else {
3342 tls_show_errors(MSG_INFO, __func__,
3343 "Failed to read possible "
3344 "Application Data");
3345 }
3346 wpabuf_free(appl_data);
3347 return NULL;
3348 }
3349
3350 wpabuf_put(appl_data, res);
3351 wpa_hexdump_buf_key(MSG_MSGDUMP, "SSL: Application Data in Finished "
3352 "message", appl_data);
3353
3354 return appl_data;
3355 }
3356
3357
3358 static struct wpabuf *
openssl_connection_handshake(struct tls_connection * conn,const struct wpabuf * in_data,struct wpabuf ** appl_data,int server)3359 openssl_connection_handshake(struct tls_connection *conn,
3360 const struct wpabuf *in_data,
3361 struct wpabuf **appl_data, int server)
3362 {
3363 struct wpabuf *out_data;
3364
3365 if (appl_data)
3366 *appl_data = NULL;
3367
3368 out_data = openssl_handshake(conn, in_data, server);
3369 if (out_data == NULL)
3370 return NULL;
3371 if (conn->invalid_hb_used) {
3372 wpa_printf(MSG_INFO, "TLS: Heartbeat attack detected - do not send response");
3373 wpabuf_free(out_data);
3374 return NULL;
3375 }
3376
3377 if (SSL_is_init_finished(conn->ssl)) {
3378 wpa_printf(MSG_DEBUG,
3379 "OpenSSL: Handshake finished - resumed=%d",
3380 tls_connection_resumed(conn->ssl_ctx, conn));
3381 if (appl_data && in_data)
3382 *appl_data = openssl_get_appl_data(conn,
3383 wpabuf_len(in_data));
3384 }
3385
3386 if (conn->invalid_hb_used) {
3387 wpa_printf(MSG_INFO, "TLS: Heartbeat attack detected - do not send response");
3388 if (appl_data) {
3389 wpabuf_free(*appl_data);
3390 *appl_data = NULL;
3391 }
3392 wpabuf_free(out_data);
3393 return NULL;
3394 }
3395
3396 return out_data;
3397 }
3398
3399
3400 struct wpabuf *
tls_connection_handshake(void * ssl_ctx,struct tls_connection * conn,const struct wpabuf * in_data,struct wpabuf ** appl_data)3401 tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn,
3402 const struct wpabuf *in_data,
3403 struct wpabuf **appl_data)
3404 {
3405 return openssl_connection_handshake(conn, in_data, appl_data, 0);
3406 }
3407
3408
tls_connection_server_handshake(void * tls_ctx,struct tls_connection * conn,const struct wpabuf * in_data,struct wpabuf ** appl_data)3409 struct wpabuf * tls_connection_server_handshake(void *tls_ctx,
3410 struct tls_connection *conn,
3411 const struct wpabuf *in_data,
3412 struct wpabuf **appl_data)
3413 {
3414 return openssl_connection_handshake(conn, in_data, appl_data, 1);
3415 }
3416
3417
tls_connection_encrypt(void * tls_ctx,struct tls_connection * conn,const struct wpabuf * in_data)3418 struct wpabuf * tls_connection_encrypt(void *tls_ctx,
3419 struct tls_connection *conn,
3420 const struct wpabuf *in_data)
3421 {
3422 int res;
3423 struct wpabuf *buf;
3424
3425 if (conn == NULL)
3426 return NULL;
3427
3428 /* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */
3429 if ((res = BIO_reset(conn->ssl_in)) < 0 ||
3430 (res = BIO_reset(conn->ssl_out)) < 0) {
3431 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
3432 return NULL;
3433 }
3434 res = SSL_write(conn->ssl, wpabuf_head(in_data), wpabuf_len(in_data));
3435 if (res < 0) {
3436 tls_show_errors(MSG_INFO, __func__,
3437 "Encryption failed - SSL_write");
3438 return NULL;
3439 }
3440
3441 /* Read encrypted data to be sent to the server */
3442 buf = wpabuf_alloc(wpabuf_len(in_data) + 300);
3443 if (buf == NULL)
3444 return NULL;
3445 res = BIO_read(conn->ssl_out, wpabuf_mhead(buf), wpabuf_size(buf));
3446 if (res < 0) {
3447 tls_show_errors(MSG_INFO, __func__,
3448 "Encryption failed - BIO_read");
3449 wpabuf_free(buf);
3450 return NULL;
3451 }
3452 wpabuf_put(buf, res);
3453
3454 return buf;
3455 }
3456
3457
tls_connection_decrypt(void * tls_ctx,struct tls_connection * conn,const struct wpabuf * in_data)3458 struct wpabuf * tls_connection_decrypt(void *tls_ctx,
3459 struct tls_connection *conn,
3460 const struct wpabuf *in_data)
3461 {
3462 int res;
3463 struct wpabuf *buf;
3464
3465 /* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */
3466 res = BIO_write(conn->ssl_in, wpabuf_head(in_data),
3467 wpabuf_len(in_data));
3468 if (res < 0) {
3469 tls_show_errors(MSG_INFO, __func__,
3470 "Decryption failed - BIO_write");
3471 return NULL;
3472 }
3473 if (BIO_reset(conn->ssl_out) < 0) {
3474 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
3475 return NULL;
3476 }
3477
3478 /* Read decrypted data for further processing */
3479 /*
3480 * Even though we try to disable TLS compression, it is possible that
3481 * this cannot be done with all TLS libraries. Add extra buffer space
3482 * to handle the possibility of the decrypted data being longer than
3483 * input data.
3484 */
3485 buf = wpabuf_alloc((wpabuf_len(in_data) + 500) * 3);
3486 if (buf == NULL)
3487 return NULL;
3488 res = SSL_read(conn->ssl, wpabuf_mhead(buf), wpabuf_size(buf));
3489 if (res < 0) {
3490 tls_show_errors(MSG_INFO, __func__,
3491 "Decryption failed - SSL_read");
3492 wpabuf_free(buf);
3493 return NULL;
3494 }
3495 wpabuf_put(buf, res);
3496
3497 if (conn->invalid_hb_used) {
3498 wpa_printf(MSG_INFO, "TLS: Heartbeat attack detected - do not send response");
3499 wpabuf_free(buf);
3500 return NULL;
3501 }
3502
3503 return buf;
3504 }
3505
3506
tls_connection_resumed(void * ssl_ctx,struct tls_connection * conn)3507 int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn)
3508 {
3509 return conn ? SSL_cache_hit(conn->ssl) : 0;
3510 }
3511
3512
tls_connection_set_cipher_list(void * tls_ctx,struct tls_connection * conn,u8 * ciphers)3513 int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
3514 u8 *ciphers)
3515 {
3516 char buf[500], *pos, *end;
3517 u8 *c;
3518 int ret;
3519
3520 if (conn == NULL || conn->ssl == NULL || ciphers == NULL)
3521 return -1;
3522
3523 buf[0] = '\0';
3524 pos = buf;
3525 end = pos + sizeof(buf);
3526
3527 c = ciphers;
3528 while (*c != TLS_CIPHER_NONE) {
3529 const char *suite;
3530
3531 switch (*c) {
3532 case TLS_CIPHER_RC4_SHA:
3533 suite = "RC4-SHA";
3534 break;
3535 case TLS_CIPHER_AES128_SHA:
3536 suite = "AES128-SHA";
3537 break;
3538 case TLS_CIPHER_RSA_DHE_AES128_SHA:
3539 suite = "DHE-RSA-AES128-SHA";
3540 break;
3541 case TLS_CIPHER_ANON_DH_AES128_SHA:
3542 suite = "ADH-AES128-SHA";
3543 break;
3544 case TLS_CIPHER_RSA_DHE_AES256_SHA:
3545 suite = "DHE-RSA-AES256-SHA";
3546 break;
3547 case TLS_CIPHER_AES256_SHA:
3548 suite = "AES256-SHA";
3549 break;
3550 default:
3551 wpa_printf(MSG_DEBUG, "TLS: Unsupported "
3552 "cipher selection: %d", *c);
3553 return -1;
3554 }
3555 ret = os_snprintf(pos, end - pos, ":%s", suite);
3556 if (os_snprintf_error(end - pos, ret))
3557 break;
3558 pos += ret;
3559
3560 c++;
3561 }
3562
3563 wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1);
3564
3565 #if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
3566 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
3567 if (os_strstr(buf, ":ADH-")) {
3568 /*
3569 * Need to drop to security level 0 to allow anonymous
3570 * cipher suites for EAP-FAST.
3571 */
3572 SSL_set_security_level(conn->ssl, 0);
3573 } else if (SSL_get_security_level(conn->ssl) == 0) {
3574 /* Force at least security level 1 */
3575 SSL_set_security_level(conn->ssl, 1);
3576 }
3577 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
3578 #endif
3579
3580 if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) {
3581 tls_show_errors(MSG_INFO, __func__,
3582 "Cipher suite configuration failed");
3583 return -1;
3584 }
3585
3586 return 0;
3587 }
3588
3589
tls_get_version(void * ssl_ctx,struct tls_connection * conn,char * buf,size_t buflen)3590 int tls_get_version(void *ssl_ctx, struct tls_connection *conn,
3591 char *buf, size_t buflen)
3592 {
3593 const char *name;
3594 if (conn == NULL || conn->ssl == NULL)
3595 return -1;
3596
3597 name = SSL_get_version(conn->ssl);
3598 if (name == NULL)
3599 return -1;
3600
3601 os_strlcpy(buf, name, buflen);
3602 return 0;
3603 }
3604
3605
tls_get_cipher(void * ssl_ctx,struct tls_connection * conn,char * buf,size_t buflen)3606 int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn,
3607 char *buf, size_t buflen)
3608 {
3609 const char *name;
3610 if (conn == NULL || conn->ssl == NULL)
3611 return -1;
3612
3613 name = SSL_get_cipher(conn->ssl);
3614 if (name == NULL)
3615 return -1;
3616
3617 os_strlcpy(buf, name, buflen);
3618 return 0;
3619 }
3620
3621
tls_connection_enable_workaround(void * ssl_ctx,struct tls_connection * conn)3622 int tls_connection_enable_workaround(void *ssl_ctx,
3623 struct tls_connection *conn)
3624 {
3625 SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
3626
3627 return 0;
3628 }
3629
3630
3631 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
3632 /* ClientHello TLS extensions require a patch to openssl, so this function is
3633 * commented out unless explicitly needed for EAP-FAST in order to be able to
3634 * 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)3635 int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn,
3636 int ext_type, const u8 *data,
3637 size_t data_len)
3638 {
3639 if (conn == NULL || conn->ssl == NULL || ext_type != 35)
3640 return -1;
3641
3642 if (SSL_set_session_ticket_ext(conn->ssl, (void *) data,
3643 data_len) != 1)
3644 return -1;
3645
3646 return 0;
3647 }
3648 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
3649
3650
tls_connection_get_failed(void * ssl_ctx,struct tls_connection * conn)3651 int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn)
3652 {
3653 if (conn == NULL)
3654 return -1;
3655 return conn->failed;
3656 }
3657
3658
tls_connection_get_read_alerts(void * ssl_ctx,struct tls_connection * conn)3659 int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn)
3660 {
3661 if (conn == NULL)
3662 return -1;
3663 return conn->read_alerts;
3664 }
3665
3666
tls_connection_get_write_alerts(void * ssl_ctx,struct tls_connection * conn)3667 int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn)
3668 {
3669 if (conn == NULL)
3670 return -1;
3671 return conn->write_alerts;
3672 }
3673
3674
3675 #ifdef HAVE_OCSP
3676
ocsp_debug_print_resp(OCSP_RESPONSE * rsp)3677 static void ocsp_debug_print_resp(OCSP_RESPONSE *rsp)
3678 {
3679 #ifndef CONFIG_NO_STDOUT_DEBUG
3680 BIO *out;
3681 size_t rlen;
3682 char *txt;
3683 int res;
3684
3685 if (wpa_debug_level > MSG_DEBUG)
3686 return;
3687
3688 out = BIO_new(BIO_s_mem());
3689 if (!out)
3690 return;
3691
3692 OCSP_RESPONSE_print(out, rsp, 0);
3693 rlen = BIO_ctrl_pending(out);
3694 txt = os_malloc(rlen + 1);
3695 if (!txt) {
3696 BIO_free(out);
3697 return;
3698 }
3699
3700 res = BIO_read(out, txt, rlen);
3701 if (res > 0) {
3702 txt[res] = '\0';
3703 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP Response\n%s", txt);
3704 }
3705 os_free(txt);
3706 BIO_free(out);
3707 #endif /* CONFIG_NO_STDOUT_DEBUG */
3708 }
3709
3710
debug_print_cert(X509 * cert,const char * title)3711 static void debug_print_cert(X509 *cert, const char *title)
3712 {
3713 #ifndef CONFIG_NO_STDOUT_DEBUG
3714 BIO *out;
3715 size_t rlen;
3716 char *txt;
3717 int res;
3718
3719 if (wpa_debug_level > MSG_DEBUG)
3720 return;
3721
3722 out = BIO_new(BIO_s_mem());
3723 if (!out)
3724 return;
3725
3726 X509_print(out, cert);
3727 rlen = BIO_ctrl_pending(out);
3728 txt = os_malloc(rlen + 1);
3729 if (!txt) {
3730 BIO_free(out);
3731 return;
3732 }
3733
3734 res = BIO_read(out, txt, rlen);
3735 if (res > 0) {
3736 txt[res] = '\0';
3737 wpa_printf(MSG_DEBUG, "OpenSSL: %s\n%s", title, txt);
3738 }
3739 os_free(txt);
3740
3741 BIO_free(out);
3742 #endif /* CONFIG_NO_STDOUT_DEBUG */
3743 }
3744
3745
ocsp_resp_cb(SSL * s,void * arg)3746 static int ocsp_resp_cb(SSL *s, void *arg)
3747 {
3748 struct tls_connection *conn = arg;
3749 const unsigned char *p;
3750 int len, status, reason;
3751 OCSP_RESPONSE *rsp;
3752 OCSP_BASICRESP *basic;
3753 OCSP_CERTID *id;
3754 ASN1_GENERALIZEDTIME *produced_at, *this_update, *next_update;
3755 X509_STORE *store;
3756 STACK_OF(X509) *certs = NULL;
3757
3758 len = SSL_get_tlsext_status_ocsp_resp(s, &p);
3759 if (!p) {
3760 wpa_printf(MSG_DEBUG, "OpenSSL: No OCSP response received");
3761 return (conn->flags & TLS_CONN_REQUIRE_OCSP) ? 0 : 1;
3762 }
3763
3764 wpa_hexdump(MSG_DEBUG, "OpenSSL: OCSP response", p, len);
3765
3766 rsp = d2i_OCSP_RESPONSE(NULL, &p, len);
3767 if (!rsp) {
3768 wpa_printf(MSG_INFO, "OpenSSL: Failed to parse OCSP response");
3769 return 0;
3770 }
3771
3772 ocsp_debug_print_resp(rsp);
3773
3774 status = OCSP_response_status(rsp);
3775 if (status != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
3776 wpa_printf(MSG_INFO, "OpenSSL: OCSP responder error %d (%s)",
3777 status, OCSP_response_status_str(status));
3778 return 0;
3779 }
3780
3781 basic = OCSP_response_get1_basic(rsp);
3782 if (!basic) {
3783 wpa_printf(MSG_INFO, "OpenSSL: Could not find BasicOCSPResponse");
3784 return 0;
3785 }
3786
3787 store = SSL_CTX_get_cert_store(conn->ssl_ctx);
3788 if (conn->peer_issuer) {
3789 debug_print_cert(conn->peer_issuer, "Add OCSP issuer");
3790
3791 if (X509_STORE_add_cert(store, conn->peer_issuer) != 1) {
3792 tls_show_errors(MSG_INFO, __func__,
3793 "OpenSSL: Could not add issuer to certificate store");
3794 }
3795 certs = sk_X509_new_null();
3796 if (certs) {
3797 X509 *cert;
3798 cert = X509_dup(conn->peer_issuer);
3799 if (cert && !sk_X509_push(certs, cert)) {
3800 tls_show_errors(
3801 MSG_INFO, __func__,
3802 "OpenSSL: Could not add issuer to OCSP responder trust store");
3803 X509_free(cert);
3804 sk_X509_free(certs);
3805 certs = NULL;
3806 }
3807 if (certs && conn->peer_issuer_issuer) {
3808 cert = X509_dup(conn->peer_issuer_issuer);
3809 if (cert && !sk_X509_push(certs, cert)) {
3810 tls_show_errors(
3811 MSG_INFO, __func__,
3812 "OpenSSL: Could not add issuer's issuer to OCSP responder trust store");
3813 X509_free(cert);
3814 }
3815 }
3816 }
3817 }
3818
3819 status = OCSP_basic_verify(basic, certs, store, OCSP_TRUSTOTHER);
3820 sk_X509_pop_free(certs, X509_free);
3821 if (status <= 0) {
3822 tls_show_errors(MSG_INFO, __func__,
3823 "OpenSSL: OCSP response failed verification");
3824 OCSP_BASICRESP_free(basic);
3825 OCSP_RESPONSE_free(rsp);
3826 return 0;
3827 }
3828
3829 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP response verification succeeded");
3830
3831 if (!conn->peer_cert) {
3832 wpa_printf(MSG_DEBUG, "OpenSSL: Peer certificate not available for OCSP status check");
3833 OCSP_BASICRESP_free(basic);
3834 OCSP_RESPONSE_free(rsp);
3835 return 0;
3836 }
3837
3838 if (!conn->peer_issuer) {
3839 wpa_printf(MSG_DEBUG, "OpenSSL: Peer issuer certificate not available for OCSP status check");
3840 OCSP_BASICRESP_free(basic);
3841 OCSP_RESPONSE_free(rsp);
3842 return 0;
3843 }
3844
3845 id = OCSP_cert_to_id(NULL, conn->peer_cert, conn->peer_issuer);
3846 if (!id) {
3847 wpa_printf(MSG_DEBUG, "OpenSSL: Could not create OCSP certificate identifier");
3848 OCSP_BASICRESP_free(basic);
3849 OCSP_RESPONSE_free(rsp);
3850 return 0;
3851 }
3852
3853 if (!OCSP_resp_find_status(basic, id, &status, &reason, &produced_at,
3854 &this_update, &next_update)) {
3855 wpa_printf(MSG_INFO, "OpenSSL: Could not find current server certificate from OCSP response%s",
3856 (conn->flags & TLS_CONN_REQUIRE_OCSP) ? "" :
3857 " (OCSP not required)");
3858 OCSP_CERTID_free(id);
3859 OCSP_BASICRESP_free(basic);
3860 OCSP_RESPONSE_free(rsp);
3861 return (conn->flags & TLS_CONN_REQUIRE_OCSP) ? 0 : 1;
3862 }
3863 OCSP_CERTID_free(id);
3864
3865 if (!OCSP_check_validity(this_update, next_update, 5 * 60, -1)) {
3866 tls_show_errors(MSG_INFO, __func__,
3867 "OpenSSL: OCSP status times invalid");
3868 OCSP_BASICRESP_free(basic);
3869 OCSP_RESPONSE_free(rsp);
3870 return 0;
3871 }
3872
3873 OCSP_BASICRESP_free(basic);
3874 OCSP_RESPONSE_free(rsp);
3875
3876 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status for server certificate: %s",
3877 OCSP_cert_status_str(status));
3878
3879 if (status == V_OCSP_CERTSTATUS_GOOD)
3880 return 1;
3881 if (status == V_OCSP_CERTSTATUS_REVOKED)
3882 return 0;
3883 if (conn->flags & TLS_CONN_REQUIRE_OCSP) {
3884 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status unknown, but OCSP required");
3885 return 0;
3886 }
3887 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status unknown, but OCSP was not required, so allow connection to continue");
3888 return 1;
3889 }
3890
3891
ocsp_status_cb(SSL * s,void * arg)3892 static int ocsp_status_cb(SSL *s, void *arg)
3893 {
3894 char *tmp;
3895 char *resp;
3896 size_t len;
3897
3898 if (tls_global->ocsp_stapling_response == NULL) {
3899 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - no response configured");
3900 return SSL_TLSEXT_ERR_OK;
3901 }
3902
3903 resp = os_readfile(tls_global->ocsp_stapling_response, &len);
3904 if (resp == NULL) {
3905 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - could not read response file");
3906 /* TODO: Build OCSPResponse with responseStatus = internalError
3907 */
3908 return SSL_TLSEXT_ERR_OK;
3909 }
3910 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - send cached response");
3911 tmp = OPENSSL_malloc(len);
3912 if (tmp == NULL) {
3913 os_free(resp);
3914 return SSL_TLSEXT_ERR_ALERT_FATAL;
3915 }
3916
3917 os_memcpy(tmp, resp, len);
3918 os_free(resp);
3919 SSL_set_tlsext_status_ocsp_resp(s, tmp, len);
3920
3921 return SSL_TLSEXT_ERR_OK;
3922 }
3923
3924 #endif /* HAVE_OCSP */
3925
3926
tls_connection_set_params(void * tls_ctx,struct tls_connection * conn,const struct tls_connection_params * params)3927 int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
3928 const struct tls_connection_params *params)
3929 {
3930 struct tls_data *data = tls_ctx;
3931 int ret;
3932 unsigned long err;
3933 int can_pkcs11 = 0;
3934 const char *key_id = params->key_id;
3935 const char *cert_id = params->cert_id;
3936 const char *ca_cert_id = params->ca_cert_id;
3937 const char *engine_id = params->engine ? params->engine_id : NULL;
3938
3939 if (conn == NULL)
3940 return -1;
3941
3942 if (params->flags & TLS_CONN_REQUIRE_OCSP_ALL) {
3943 wpa_printf(MSG_INFO,
3944 "OpenSSL: ocsp=3 not supported");
3945 return -1;
3946 }
3947
3948 /*
3949 * If the engine isn't explicitly configured, and any of the
3950 * cert/key fields are actually PKCS#11 URIs, then automatically
3951 * use the PKCS#11 ENGINE.
3952 */
3953 if (!engine_id || os_strcmp(engine_id, "pkcs11") == 0)
3954 can_pkcs11 = 1;
3955
3956 if (!key_id && params->private_key && can_pkcs11 &&
3957 os_strncmp(params->private_key, "pkcs11:", 7) == 0) {
3958 can_pkcs11 = 2;
3959 key_id = params->private_key;
3960 }
3961
3962 if (!cert_id && params->client_cert && can_pkcs11 &&
3963 os_strncmp(params->client_cert, "pkcs11:", 7) == 0) {
3964 can_pkcs11 = 2;
3965 cert_id = params->client_cert;
3966 }
3967
3968 if (!ca_cert_id && params->ca_cert && can_pkcs11 &&
3969 os_strncmp(params->ca_cert, "pkcs11:", 7) == 0) {
3970 can_pkcs11 = 2;
3971 ca_cert_id = params->ca_cert;
3972 }
3973
3974 /* If we need to automatically enable the PKCS#11 ENGINE, do so. */
3975 if (can_pkcs11 == 2 && !engine_id)
3976 engine_id = "pkcs11";
3977
3978 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
3979 #if OPENSSL_VERSION_NUMBER < 0x10100000L
3980 if (params->flags & TLS_CONN_EAP_FAST) {
3981 wpa_printf(MSG_DEBUG,
3982 "OpenSSL: Use TLSv1_method() for EAP-FAST");
3983 if (SSL_set_ssl_method(conn->ssl, TLSv1_method()) != 1) {
3984 tls_show_errors(MSG_INFO, __func__,
3985 "Failed to set TLSv1_method() for EAP-FAST");
3986 return -1;
3987 }
3988 }
3989 #endif
3990 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
3991
3992 while ((err = ERR_get_error())) {
3993 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
3994 __func__, ERR_error_string(err, NULL));
3995 }
3996
3997 if (engine_id) {
3998 wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine");
3999 ret = tls_engine_init(conn, engine_id, params->pin,
4000 key_id, cert_id, ca_cert_id);
4001 if (ret)
4002 return ret;
4003 }
4004 if (tls_connection_set_subject_match(conn,
4005 params->subject_match,
4006 params->altsubject_match,
4007 params->suffix_match,
4008 params->domain_match))
4009 return -1;
4010
4011 if (engine_id && ca_cert_id) {
4012 if (tls_connection_engine_ca_cert(data, conn, ca_cert_id))
4013 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
4014 } else if (tls_connection_ca_cert(data, conn, params->ca_cert,
4015 params->ca_cert_blob,
4016 params->ca_cert_blob_len,
4017 params->ca_path))
4018 return -1;
4019
4020 if (engine_id && cert_id) {
4021 if (tls_connection_engine_client_cert(conn, cert_id))
4022 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
4023 } else if (tls_connection_client_cert(conn, params->client_cert,
4024 params->client_cert_blob,
4025 params->client_cert_blob_len))
4026 return -1;
4027
4028 if (engine_id && key_id) {
4029 wpa_printf(MSG_DEBUG, "TLS: Using private key from engine");
4030 if (tls_connection_engine_private_key(conn))
4031 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
4032 } else if (tls_connection_private_key(data, conn,
4033 params->private_key,
4034 params->private_key_passwd,
4035 params->private_key_blob,
4036 params->private_key_blob_len)) {
4037 wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'",
4038 params->private_key);
4039 return -1;
4040 }
4041
4042 if (tls_connection_dh(conn, params->dh_file)) {
4043 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
4044 params->dh_file);
4045 return -1;
4046 }
4047
4048 if (params->openssl_ciphers &&
4049 SSL_set_cipher_list(conn->ssl, params->openssl_ciphers) != 1) {
4050 wpa_printf(MSG_INFO,
4051 "OpenSSL: Failed to set cipher string '%s'",
4052 params->openssl_ciphers);
4053 return -1;
4054 }
4055
4056 tls_set_conn_flags(conn->ssl, params->flags);
4057
4058 #ifdef OPENSSL_IS_BORINGSSL
4059 if (params->flags & TLS_CONN_REQUEST_OCSP) {
4060 SSL_enable_ocsp_stapling(conn->ssl);
4061 }
4062 #else /* OPENSSL_IS_BORINGSSL */
4063 #ifdef HAVE_OCSP
4064 if (params->flags & TLS_CONN_REQUEST_OCSP) {
4065 SSL_CTX *ssl_ctx = data->ssl;
4066 SSL_set_tlsext_status_type(conn->ssl, TLSEXT_STATUSTYPE_ocsp);
4067 SSL_CTX_set_tlsext_status_cb(ssl_ctx, ocsp_resp_cb);
4068 SSL_CTX_set_tlsext_status_arg(ssl_ctx, conn);
4069 }
4070 #else /* HAVE_OCSP */
4071 if (params->flags & TLS_CONN_REQUIRE_OCSP) {
4072 wpa_printf(MSG_INFO,
4073 "OpenSSL: No OCSP support included - reject configuration");
4074 return -1;
4075 }
4076 if (params->flags & TLS_CONN_REQUEST_OCSP) {
4077 wpa_printf(MSG_DEBUG,
4078 "OpenSSL: No OCSP support included - allow optional OCSP case to continue");
4079 }
4080 #endif /* HAVE_OCSP */
4081 #endif /* OPENSSL_IS_BORINGSSL */
4082
4083 conn->flags = params->flags;
4084
4085 tls_get_errors(data);
4086
4087 return 0;
4088 }
4089
4090
tls_global_set_params(void * tls_ctx,const struct tls_connection_params * params)4091 int tls_global_set_params(void *tls_ctx,
4092 const struct tls_connection_params *params)
4093 {
4094 struct tls_data *data = tls_ctx;
4095 SSL_CTX *ssl_ctx = data->ssl;
4096 unsigned long err;
4097
4098 while ((err = ERR_get_error())) {
4099 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
4100 __func__, ERR_error_string(err, NULL));
4101 }
4102
4103 if (tls_global_ca_cert(data, params->ca_cert) ||
4104 tls_global_client_cert(data, params->client_cert) ||
4105 tls_global_private_key(data, params->private_key,
4106 params->private_key_passwd) ||
4107 tls_global_dh(data, params->dh_file)) {
4108 wpa_printf(MSG_INFO, "TLS: Failed to set global parameters");
4109 return -1;
4110 }
4111
4112 if (params->openssl_ciphers &&
4113 SSL_CTX_set_cipher_list(ssl_ctx, params->openssl_ciphers) != 1) {
4114 wpa_printf(MSG_INFO,
4115 "OpenSSL: Failed to set cipher string '%s'",
4116 params->openssl_ciphers);
4117 return -1;
4118 }
4119
4120 #ifdef SSL_OP_NO_TICKET
4121 if (params->flags & TLS_CONN_DISABLE_SESSION_TICKET)
4122 SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_TICKET);
4123 #ifdef SSL_CTX_clear_options
4124 else
4125 SSL_CTX_clear_options(ssl_ctx, SSL_OP_NO_TICKET);
4126 #endif /* SSL_clear_options */
4127 #endif /* SSL_OP_NO_TICKET */
4128
4129 #ifdef HAVE_OCSP
4130 SSL_CTX_set_tlsext_status_cb(ssl_ctx, ocsp_status_cb);
4131 SSL_CTX_set_tlsext_status_arg(ssl_ctx, ssl_ctx);
4132 os_free(tls_global->ocsp_stapling_response);
4133 if (params->ocsp_stapling_response)
4134 tls_global->ocsp_stapling_response =
4135 os_strdup(params->ocsp_stapling_response);
4136 else
4137 tls_global->ocsp_stapling_response = NULL;
4138 #endif /* HAVE_OCSP */
4139
4140 return 0;
4141 }
4142
4143
4144 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
4145 /* Pre-shared secred requires a patch to openssl, so this function is
4146 * commented out unless explicitly needed for EAP-FAST in order to be able to
4147 * build this file with unmodified openssl. */
4148
4149 #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)4150 static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
4151 STACK_OF(SSL_CIPHER) *peer_ciphers,
4152 const SSL_CIPHER **cipher, void *arg)
4153 #else /* OPENSSL_IS_BORINGSSL */
4154 static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
4155 STACK_OF(SSL_CIPHER) *peer_ciphers,
4156 SSL_CIPHER **cipher, void *arg)
4157 #endif /* OPENSSL_IS_BORINGSSL */
4158 {
4159 struct tls_connection *conn = arg;
4160 int ret;
4161
4162 #if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
4163 if (conn == NULL || conn->session_ticket_cb == NULL)
4164 return 0;
4165
4166 ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx,
4167 conn->session_ticket,
4168 conn->session_ticket_len,
4169 s->s3->client_random,
4170 s->s3->server_random, secret);
4171 #else
4172 unsigned char client_random[SSL3_RANDOM_SIZE];
4173 unsigned char server_random[SSL3_RANDOM_SIZE];
4174
4175 if (conn == NULL || conn->session_ticket_cb == NULL)
4176 return 0;
4177
4178 SSL_get_client_random(s, client_random, sizeof(client_random));
4179 SSL_get_server_random(s, server_random, sizeof(server_random));
4180
4181 ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx,
4182 conn->session_ticket,
4183 conn->session_ticket_len,
4184 client_random,
4185 server_random, secret);
4186 #endif
4187
4188 os_free(conn->session_ticket);
4189 conn->session_ticket = NULL;
4190
4191 if (ret <= 0)
4192 return 0;
4193
4194 *secret_len = SSL_MAX_MASTER_KEY_LENGTH;
4195 return 1;
4196 }
4197
4198
tls_session_ticket_ext_cb(SSL * s,const unsigned char * data,int len,void * arg)4199 static int tls_session_ticket_ext_cb(SSL *s, const unsigned char *data,
4200 int len, void *arg)
4201 {
4202 struct tls_connection *conn = arg;
4203
4204 if (conn == NULL || conn->session_ticket_cb == NULL)
4205 return 0;
4206
4207 wpa_printf(MSG_DEBUG, "OpenSSL: %s: length=%d", __func__, len);
4208
4209 os_free(conn->session_ticket);
4210 conn->session_ticket = NULL;
4211
4212 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
4213 "extension", data, len);
4214
4215 conn->session_ticket = os_malloc(len);
4216 if (conn->session_ticket == NULL)
4217 return 0;
4218
4219 os_memcpy(conn->session_ticket, data, len);
4220 conn->session_ticket_len = len;
4221
4222 return 1;
4223 }
4224 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
4225
4226
tls_connection_set_session_ticket_cb(void * tls_ctx,struct tls_connection * conn,tls_session_ticket_cb cb,void * ctx)4227 int tls_connection_set_session_ticket_cb(void *tls_ctx,
4228 struct tls_connection *conn,
4229 tls_session_ticket_cb cb,
4230 void *ctx)
4231 {
4232 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
4233 conn->session_ticket_cb = cb;
4234 conn->session_ticket_cb_ctx = ctx;
4235
4236 if (cb) {
4237 if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb,
4238 conn) != 1)
4239 return -1;
4240 SSL_set_session_ticket_ext_cb(conn->ssl,
4241 tls_session_ticket_ext_cb, conn);
4242 } else {
4243 if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1)
4244 return -1;
4245 SSL_set_session_ticket_ext_cb(conn->ssl, NULL, NULL);
4246 }
4247
4248 return 0;
4249 #else /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
4250 return -1;
4251 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
4252 }
4253
4254
tls_get_library_version(char * buf,size_t buf_len)4255 int tls_get_library_version(char *buf, size_t buf_len)
4256 {
4257 #if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
4258 return os_snprintf(buf, buf_len, "OpenSSL build=%s run=%s",
4259 OPENSSL_VERSION_TEXT,
4260 OpenSSL_version(OPENSSL_VERSION));
4261 #else
4262 return os_snprintf(buf, buf_len, "OpenSSL build=%s run=%s",
4263 OPENSSL_VERSION_TEXT,
4264 SSLeay_version(SSLEAY_VERSION));
4265 #endif
4266 }
4267
4268
tls_connection_set_success_data(struct tls_connection * conn,struct wpabuf * data)4269 void tls_connection_set_success_data(struct tls_connection *conn,
4270 struct wpabuf *data)
4271 {
4272 SSL_SESSION *sess;
4273 struct wpabuf *old;
4274
4275 if (tls_ex_idx_session < 0)
4276 goto fail;
4277 sess = SSL_get_session(conn->ssl);
4278 if (!sess)
4279 goto fail;
4280 old = SSL_SESSION_get_ex_data(sess, tls_ex_idx_session);
4281 if (old) {
4282 wpa_printf(MSG_DEBUG, "OpenSSL: Replacing old success data %p",
4283 old);
4284 wpabuf_free(old);
4285 }
4286 if (SSL_SESSION_set_ex_data(sess, tls_ex_idx_session, data) != 1)
4287 goto fail;
4288
4289 wpa_printf(MSG_DEBUG, "OpenSSL: Stored success data %p", data);
4290 conn->success_data = 1;
4291 return;
4292
4293 fail:
4294 wpa_printf(MSG_INFO, "OpenSSL: Failed to store success data");
4295 wpabuf_free(data);
4296 }
4297
4298
tls_connection_set_success_data_resumed(struct tls_connection * conn)4299 void tls_connection_set_success_data_resumed(struct tls_connection *conn)
4300 {
4301 wpa_printf(MSG_DEBUG,
4302 "OpenSSL: Success data accepted for resumed session");
4303 conn->success_data = 1;
4304 }
4305
4306
4307 const struct wpabuf *
tls_connection_get_success_data(struct tls_connection * conn)4308 tls_connection_get_success_data(struct tls_connection *conn)
4309 {
4310 SSL_SESSION *sess;
4311
4312 if (tls_ex_idx_session < 0 ||
4313 !(sess = SSL_get_session(conn->ssl)))
4314 return NULL;
4315 return SSL_SESSION_get_ex_data(sess, tls_ex_idx_session);
4316 }
4317
4318
tls_connection_remove_session(struct tls_connection * conn)4319 void tls_connection_remove_session(struct tls_connection *conn)
4320 {
4321 SSL_SESSION *sess;
4322
4323 sess = SSL_get_session(conn->ssl);
4324 if (!sess)
4325 return;
4326
4327 if (SSL_CTX_remove_session(conn->ssl_ctx, sess) != 1)
4328 wpa_printf(MSG_DEBUG,
4329 "OpenSSL: Session was not cached");
4330 else
4331 wpa_printf(MSG_DEBUG,
4332 "OpenSSL: Removed cached session to disable session resumption");
4333 }
4334