1 /*
2 * SSL/TLS interface functions for OpenSSL
3 * Copyright (c) 2004-2015, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10
11 #ifndef CONFIG_SMARTCARD
12 #ifndef OPENSSL_NO_ENGINE
13 #ifndef ANDROID
14 #define OPENSSL_NO_ENGINE
15 #endif
16 #endif
17 #endif
18
19 #include <openssl/ssl.h>
20 #include <openssl/err.h>
21 #include <openssl/opensslv.h>
22 #include <openssl/pkcs12.h>
23 #include <openssl/x509v3.h>
24 #ifndef OPENSSL_NO_ENGINE
25 #include <openssl/engine.h>
26 #endif /* OPENSSL_NO_ENGINE */
27 #ifndef OPENSSL_NO_DSA
28 #include <openssl/dsa.h>
29 #endif
30 #ifndef OPENSSL_NO_DH
31 #include <openssl/dh.h>
32 #endif
33
34 #include "common.h"
35 #include "crypto.h"
36 #include "sha1.h"
37 #include "sha256.h"
38 #include "tls.h"
39 #include "tls_openssl.h"
40
41 #if !defined(CONFIG_FIPS) && \
42 (defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || \
43 defined(EAP_SERVER_FAST))
44 #define OPENSSL_NEED_EAP_FAST_PRF
45 #endif
46
47 #if defined(OPENSSL_IS_BORINGSSL)
48 /* stack_index_t is the return type of OpenSSL's sk_XXX_num() functions. */
49 typedef size_t stack_index_t;
50 #else
51 typedef int stack_index_t;
52 #endif
53
54 #ifdef SSL_set_tlsext_status_type
55 #ifndef OPENSSL_NO_TLSEXT
56 #define HAVE_OCSP
57 #include <openssl/ocsp.h>
58 #endif /* OPENSSL_NO_TLSEXT */
59 #endif /* SSL_set_tlsext_status_type */
60
61 #if (OPENSSL_VERSION_NUMBER < 0x10100000L || \
62 defined(LIBRESSL_VERSION_NUMBER)) && \
63 !defined(BORINGSSL_API_VERSION)
64 /*
65 * SSL_get_client_random() and SSL_get_server_random() were added in OpenSSL
66 * 1.1.0 and newer BoringSSL revisions. Provide compatibility wrappers for
67 * older versions.
68 */
69
SSL_get_client_random(const SSL * ssl,unsigned char * out,size_t outlen)70 static size_t SSL_get_client_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->client_random, SSL3_RANDOM_SIZE);
76 return SSL3_RANDOM_SIZE;
77 }
78
79
SSL_get_server_random(const SSL * ssl,unsigned char * out,size_t outlen)80 static size_t SSL_get_server_random(const SSL *ssl, unsigned char *out,
81 size_t outlen)
82 {
83 if (!ssl->s3 || outlen < SSL3_RANDOM_SIZE)
84 return 0;
85 os_memcpy(out, ssl->s3->server_random, SSL3_RANDOM_SIZE);
86 return SSL3_RANDOM_SIZE;
87 }
88
89
90 #ifdef OPENSSL_NEED_EAP_FAST_PRF
SSL_SESSION_get_master_key(const SSL_SESSION * session,unsigned char * out,size_t outlen)91 static size_t SSL_SESSION_get_master_key(const SSL_SESSION *session,
92 unsigned char *out, size_t outlen)
93 {
94 if (!session || session->master_key_length < 0 ||
95 (size_t) session->master_key_length > outlen)
96 return 0;
97 if ((size_t) session->master_key_length < outlen)
98 outlen = session->master_key_length;
99 os_memcpy(out, session->master_key, outlen);
100 return outlen;
101 }
102 #endif /* OPENSSL_NEED_EAP_FAST_PRF */
103
104 #endif
105
106 #ifdef ANDROID
107 #include <openssl/pem.h>
108 #include <keystore/keystore_get.h>
109
BIO_from_keystore(const char * key)110 static BIO * BIO_from_keystore(const char *key)
111 {
112 BIO *bio = NULL;
113 uint8_t *value = NULL;
114 int length = keystore_get(key, strlen(key), &value);
115 if (length != -1 && (bio = BIO_new(BIO_s_mem())) != NULL)
116 BIO_write(bio, value, length);
117 free(value);
118 return bio;
119 }
120
121
tls_add_ca_from_keystore(X509_STORE * ctx,const char * key_alias)122 static int tls_add_ca_from_keystore(X509_STORE *ctx, const char *key_alias)
123 {
124 BIO *bio = BIO_from_keystore(key_alias);
125 STACK_OF(X509_INFO) *stack = NULL;
126 stack_index_t i;
127
128 if (bio) {
129 stack = PEM_X509_INFO_read_bio(bio, NULL, NULL, NULL);
130 BIO_free(bio);
131 }
132
133 if (!stack) {
134 wpa_printf(MSG_WARNING, "TLS: Failed to parse certificate: %s",
135 key_alias);
136 return -1;
137 }
138
139 for (i = 0; i < sk_X509_INFO_num(stack); ++i) {
140 X509_INFO *info = sk_X509_INFO_value(stack, i);
141
142 if (info->x509)
143 X509_STORE_add_cert(ctx, info->x509);
144 if (info->crl)
145 X509_STORE_add_crl(ctx, info->crl);
146 }
147
148 sk_X509_INFO_pop_free(stack, X509_INFO_free);
149
150 return 0;
151 }
152
153
tls_add_ca_from_keystore_encoded(X509_STORE * ctx,const char * encoded_key_alias)154 static int tls_add_ca_from_keystore_encoded(X509_STORE *ctx,
155 const char *encoded_key_alias)
156 {
157 int rc = -1;
158 int len = os_strlen(encoded_key_alias);
159 unsigned char *decoded_alias;
160
161 if (len & 1) {
162 wpa_printf(MSG_WARNING, "Invalid hex-encoded alias: %s",
163 encoded_key_alias);
164 return rc;
165 }
166
167 decoded_alias = os_malloc(len / 2 + 1);
168 if (decoded_alias) {
169 if (!hexstr2bin(encoded_key_alias, decoded_alias, len / 2)) {
170 decoded_alias[len / 2] = '\0';
171 rc = tls_add_ca_from_keystore(
172 ctx, (const char *) decoded_alias);
173 }
174 os_free(decoded_alias);
175 }
176
177 return rc;
178 }
179
180 #endif /* ANDROID */
181
182 static int tls_openssl_ref_count = 0;
183 static int tls_ex_idx_session = -1;
184
185 struct tls_context {
186 void (*event_cb)(void *ctx, enum tls_event ev,
187 union tls_event_data *data);
188 void *cb_ctx;
189 int cert_in_cb;
190 char *ocsp_stapling_response;
191 };
192
193 static struct tls_context *tls_global = NULL;
194
195
196 struct tls_data {
197 SSL_CTX *ssl;
198 unsigned int tls_session_lifetime;
199 };
200
201 struct tls_connection {
202 struct tls_context *context;
203 SSL_CTX *ssl_ctx;
204 SSL *ssl;
205 BIO *ssl_in, *ssl_out;
206 #if defined(ANDROID) || !defined(OPENSSL_NO_ENGINE)
207 ENGINE *engine; /* functional reference to the engine */
208 EVP_PKEY *private_key; /* the private key if using engine */
209 #endif /* OPENSSL_NO_ENGINE */
210 char *subject_match, *altsubject_match, *suffix_match, *domain_match;
211 int read_alerts, write_alerts, failed;
212
213 tls_session_ticket_cb session_ticket_cb;
214 void *session_ticket_cb_ctx;
215
216 /* SessionTicket received from OpenSSL hello_extension_cb (server) */
217 u8 *session_ticket;
218 size_t session_ticket_len;
219
220 unsigned int ca_cert_verify:1;
221 unsigned int cert_probe:1;
222 unsigned int server_cert_only:1;
223 unsigned int invalid_hb_used:1;
224 unsigned int success_data:1;
225
226 u8 srv_cert_hash[32];
227
228 unsigned int flags;
229
230 X509 *peer_cert;
231 X509 *peer_issuer;
232 X509 *peer_issuer_issuer;
233
234 unsigned char client_random[SSL3_RANDOM_SIZE];
235 unsigned char server_random[SSL3_RANDOM_SIZE];
236 };
237
238
tls_context_new(const struct tls_config * conf)239 static struct tls_context * tls_context_new(const struct tls_config *conf)
240 {
241 struct tls_context *context = os_zalloc(sizeof(*context));
242 if (context == NULL)
243 return NULL;
244 if (conf) {
245 context->event_cb = conf->event_cb;
246 context->cb_ctx = conf->cb_ctx;
247 context->cert_in_cb = conf->cert_in_cb;
248 }
249 return context;
250 }
251
252
253 #ifdef CONFIG_NO_STDOUT_DEBUG
254
_tls_show_errors(void)255 static void _tls_show_errors(void)
256 {
257 unsigned long err;
258
259 while ((err = ERR_get_error())) {
260 /* Just ignore the errors, since stdout is disabled */
261 }
262 }
263 #define tls_show_errors(l, f, t) _tls_show_errors()
264
265 #else /* CONFIG_NO_STDOUT_DEBUG */
266
tls_show_errors(int level,const char * func,const char * txt)267 static void tls_show_errors(int level, const char *func, const char *txt)
268 {
269 unsigned long err;
270
271 wpa_printf(level, "OpenSSL: %s - %s %s",
272 func, txt, ERR_error_string(ERR_get_error(), NULL));
273
274 while ((err = ERR_get_error())) {
275 wpa_printf(MSG_INFO, "OpenSSL: pending error: %s",
276 ERR_error_string(err, NULL));
277 }
278 }
279
280 #endif /* CONFIG_NO_STDOUT_DEBUG */
281
282
283 #ifdef CONFIG_NATIVE_WINDOWS
284
285 /* Windows CryptoAPI and access to certificate stores */
286 #include <wincrypt.h>
287
288 #ifdef __MINGW32_VERSION
289 /*
290 * MinGW does not yet include all the needed definitions for CryptoAPI, so
291 * define here whatever extra is needed.
292 */
293 #define CERT_SYSTEM_STORE_CURRENT_USER (1 << 16)
294 #define CERT_STORE_READONLY_FLAG 0x00008000
295 #define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000
296
297 #endif /* __MINGW32_VERSION */
298
299
300 struct cryptoapi_rsa_data {
301 const CERT_CONTEXT *cert;
302 HCRYPTPROV crypt_prov;
303 DWORD key_spec;
304 BOOL free_crypt_prov;
305 };
306
307
cryptoapi_error(const char * msg)308 static void cryptoapi_error(const char *msg)
309 {
310 wpa_printf(MSG_INFO, "CryptoAPI: %s; err=%u",
311 msg, (unsigned int) GetLastError());
312 }
313
314
cryptoapi_rsa_pub_enc(int flen,const unsigned char * from,unsigned char * to,RSA * rsa,int padding)315 static int cryptoapi_rsa_pub_enc(int flen, const unsigned char *from,
316 unsigned char *to, RSA *rsa, int padding)
317 {
318 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
319 return 0;
320 }
321
322
cryptoapi_rsa_pub_dec(int flen,const unsigned char * from,unsigned char * to,RSA * rsa,int padding)323 static int cryptoapi_rsa_pub_dec(int flen, const unsigned char *from,
324 unsigned char *to, RSA *rsa, int padding)
325 {
326 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
327 return 0;
328 }
329
330
cryptoapi_rsa_priv_enc(int flen,const unsigned char * from,unsigned char * to,RSA * rsa,int padding)331 static int cryptoapi_rsa_priv_enc(int flen, const unsigned char *from,
332 unsigned char *to, RSA *rsa, int padding)
333 {
334 struct cryptoapi_rsa_data *priv =
335 (struct cryptoapi_rsa_data *) rsa->meth->app_data;
336 HCRYPTHASH hash;
337 DWORD hash_size, len, i;
338 unsigned char *buf = NULL;
339 int ret = 0;
340
341 if (priv == NULL) {
342 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
343 ERR_R_PASSED_NULL_PARAMETER);
344 return 0;
345 }
346
347 if (padding != RSA_PKCS1_PADDING) {
348 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
349 RSA_R_UNKNOWN_PADDING_TYPE);
350 return 0;
351 }
352
353 if (flen != 16 /* MD5 */ + 20 /* SHA-1 */) {
354 wpa_printf(MSG_INFO, "%s - only MD5-SHA1 hash supported",
355 __func__);
356 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
357 RSA_R_INVALID_MESSAGE_LENGTH);
358 return 0;
359 }
360
361 if (!CryptCreateHash(priv->crypt_prov, CALG_SSL3_SHAMD5, 0, 0, &hash))
362 {
363 cryptoapi_error("CryptCreateHash failed");
364 return 0;
365 }
366
367 len = sizeof(hash_size);
368 if (!CryptGetHashParam(hash, HP_HASHSIZE, (BYTE *) &hash_size, &len,
369 0)) {
370 cryptoapi_error("CryptGetHashParam failed");
371 goto err;
372 }
373
374 if ((int) hash_size != flen) {
375 wpa_printf(MSG_INFO, "CryptoAPI: Invalid hash size (%u != %d)",
376 (unsigned) hash_size, flen);
377 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
378 RSA_R_INVALID_MESSAGE_LENGTH);
379 goto err;
380 }
381 if (!CryptSetHashParam(hash, HP_HASHVAL, (BYTE * ) from, 0)) {
382 cryptoapi_error("CryptSetHashParam failed");
383 goto err;
384 }
385
386 len = RSA_size(rsa);
387 buf = os_malloc(len);
388 if (buf == NULL) {
389 RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_MALLOC_FAILURE);
390 goto err;
391 }
392
393 if (!CryptSignHash(hash, priv->key_spec, NULL, 0, buf, &len)) {
394 cryptoapi_error("CryptSignHash failed");
395 goto err;
396 }
397
398 for (i = 0; i < len; i++)
399 to[i] = buf[len - i - 1];
400 ret = len;
401
402 err:
403 os_free(buf);
404 CryptDestroyHash(hash);
405
406 return ret;
407 }
408
409
cryptoapi_rsa_priv_dec(int flen,const unsigned char * from,unsigned char * to,RSA * rsa,int padding)410 static int cryptoapi_rsa_priv_dec(int flen, const unsigned char *from,
411 unsigned char *to, RSA *rsa, int padding)
412 {
413 wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
414 return 0;
415 }
416
417
cryptoapi_free_data(struct cryptoapi_rsa_data * priv)418 static void cryptoapi_free_data(struct cryptoapi_rsa_data *priv)
419 {
420 if (priv == NULL)
421 return;
422 if (priv->crypt_prov && priv->free_crypt_prov)
423 CryptReleaseContext(priv->crypt_prov, 0);
424 if (priv->cert)
425 CertFreeCertificateContext(priv->cert);
426 os_free(priv);
427 }
428
429
cryptoapi_finish(RSA * rsa)430 static int cryptoapi_finish(RSA *rsa)
431 {
432 cryptoapi_free_data((struct cryptoapi_rsa_data *) rsa->meth->app_data);
433 os_free((void *) rsa->meth);
434 rsa->meth = NULL;
435 return 1;
436 }
437
438
cryptoapi_find_cert(const char * name,DWORD store)439 static const CERT_CONTEXT * cryptoapi_find_cert(const char *name, DWORD store)
440 {
441 HCERTSTORE cs;
442 const CERT_CONTEXT *ret = NULL;
443
444 cs = CertOpenStore((LPCSTR) CERT_STORE_PROV_SYSTEM, 0, 0,
445 store | CERT_STORE_OPEN_EXISTING_FLAG |
446 CERT_STORE_READONLY_FLAG, L"MY");
447 if (cs == NULL) {
448 cryptoapi_error("Failed to open 'My system store'");
449 return NULL;
450 }
451
452 if (strncmp(name, "cert://", 7) == 0) {
453 unsigned short wbuf[255];
454 MultiByteToWideChar(CP_ACP, 0, name + 7, -1, wbuf, 255);
455 ret = CertFindCertificateInStore(cs, X509_ASN_ENCODING |
456 PKCS_7_ASN_ENCODING,
457 0, CERT_FIND_SUBJECT_STR,
458 wbuf, NULL);
459 } else if (strncmp(name, "hash://", 7) == 0) {
460 CRYPT_HASH_BLOB blob;
461 int len;
462 const char *hash = name + 7;
463 unsigned char *buf;
464
465 len = os_strlen(hash) / 2;
466 buf = os_malloc(len);
467 if (buf && hexstr2bin(hash, buf, len) == 0) {
468 blob.cbData = len;
469 blob.pbData = buf;
470 ret = CertFindCertificateInStore(cs,
471 X509_ASN_ENCODING |
472 PKCS_7_ASN_ENCODING,
473 0, CERT_FIND_HASH,
474 &blob, NULL);
475 }
476 os_free(buf);
477 }
478
479 CertCloseStore(cs, 0);
480
481 return ret;
482 }
483
484
tls_cryptoapi_cert(SSL * ssl,const char * name)485 static int tls_cryptoapi_cert(SSL *ssl, const char *name)
486 {
487 X509 *cert = NULL;
488 RSA *rsa = NULL, *pub_rsa;
489 struct cryptoapi_rsa_data *priv;
490 RSA_METHOD *rsa_meth;
491
492 if (name == NULL ||
493 (strncmp(name, "cert://", 7) != 0 &&
494 strncmp(name, "hash://", 7) != 0))
495 return -1;
496
497 priv = os_zalloc(sizeof(*priv));
498 rsa_meth = os_zalloc(sizeof(*rsa_meth));
499 if (priv == NULL || rsa_meth == NULL) {
500 wpa_printf(MSG_WARNING, "CryptoAPI: Failed to allocate memory "
501 "for CryptoAPI RSA method");
502 os_free(priv);
503 os_free(rsa_meth);
504 return -1;
505 }
506
507 priv->cert = cryptoapi_find_cert(name, CERT_SYSTEM_STORE_CURRENT_USER);
508 if (priv->cert == NULL) {
509 priv->cert = cryptoapi_find_cert(
510 name, CERT_SYSTEM_STORE_LOCAL_MACHINE);
511 }
512 if (priv->cert == NULL) {
513 wpa_printf(MSG_INFO, "CryptoAPI: Could not find certificate "
514 "'%s'", name);
515 goto err;
516 }
517
518 cert = d2i_X509(NULL,
519 (const unsigned char **) &priv->cert->pbCertEncoded,
520 priv->cert->cbCertEncoded);
521 if (cert == NULL) {
522 wpa_printf(MSG_INFO, "CryptoAPI: Could not process X509 DER "
523 "encoding");
524 goto err;
525 }
526
527 if (!CryptAcquireCertificatePrivateKey(priv->cert,
528 CRYPT_ACQUIRE_COMPARE_KEY_FLAG,
529 NULL, &priv->crypt_prov,
530 &priv->key_spec,
531 &priv->free_crypt_prov)) {
532 cryptoapi_error("Failed to acquire a private key for the "
533 "certificate");
534 goto err;
535 }
536
537 rsa_meth->name = "Microsoft CryptoAPI RSA Method";
538 rsa_meth->rsa_pub_enc = cryptoapi_rsa_pub_enc;
539 rsa_meth->rsa_pub_dec = cryptoapi_rsa_pub_dec;
540 rsa_meth->rsa_priv_enc = cryptoapi_rsa_priv_enc;
541 rsa_meth->rsa_priv_dec = cryptoapi_rsa_priv_dec;
542 rsa_meth->finish = cryptoapi_finish;
543 rsa_meth->flags = RSA_METHOD_FLAG_NO_CHECK;
544 rsa_meth->app_data = (char *) priv;
545
546 rsa = RSA_new();
547 if (rsa == NULL) {
548 SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE,
549 ERR_R_MALLOC_FAILURE);
550 goto err;
551 }
552
553 if (!SSL_use_certificate(ssl, cert)) {
554 RSA_free(rsa);
555 rsa = NULL;
556 goto err;
557 }
558 pub_rsa = cert->cert_info->key->pkey->pkey.rsa;
559 X509_free(cert);
560 cert = NULL;
561
562 rsa->n = BN_dup(pub_rsa->n);
563 rsa->e = BN_dup(pub_rsa->e);
564 if (!RSA_set_method(rsa, rsa_meth))
565 goto err;
566
567 if (!SSL_use_RSAPrivateKey(ssl, rsa))
568 goto err;
569 RSA_free(rsa);
570
571 return 0;
572
573 err:
574 if (cert)
575 X509_free(cert);
576 if (rsa)
577 RSA_free(rsa);
578 else {
579 os_free(rsa_meth);
580 cryptoapi_free_data(priv);
581 }
582 return -1;
583 }
584
585
tls_cryptoapi_ca_cert(SSL_CTX * ssl_ctx,SSL * ssl,const char * name)586 static int tls_cryptoapi_ca_cert(SSL_CTX *ssl_ctx, SSL *ssl, const char *name)
587 {
588 HCERTSTORE cs;
589 PCCERT_CONTEXT ctx = NULL;
590 X509 *cert;
591 char buf[128];
592 const char *store;
593 #ifdef UNICODE
594 WCHAR *wstore;
595 #endif /* UNICODE */
596
597 if (name == NULL || strncmp(name, "cert_store://", 13) != 0)
598 return -1;
599
600 store = name + 13;
601 #ifdef UNICODE
602 wstore = os_malloc((os_strlen(store) + 1) * sizeof(WCHAR));
603 if (wstore == NULL)
604 return -1;
605 wsprintf(wstore, L"%S", store);
606 cs = CertOpenSystemStore(0, wstore);
607 os_free(wstore);
608 #else /* UNICODE */
609 cs = CertOpenSystemStore(0, store);
610 #endif /* UNICODE */
611 if (cs == NULL) {
612 wpa_printf(MSG_DEBUG, "%s: failed to open system cert store "
613 "'%s': error=%d", __func__, store,
614 (int) GetLastError());
615 return -1;
616 }
617
618 while ((ctx = CertEnumCertificatesInStore(cs, ctx))) {
619 cert = d2i_X509(NULL,
620 (const unsigned char **) &ctx->pbCertEncoded,
621 ctx->cbCertEncoded);
622 if (cert == NULL) {
623 wpa_printf(MSG_INFO, "CryptoAPI: Could not process "
624 "X509 DER encoding for CA cert");
625 continue;
626 }
627
628 X509_NAME_oneline(X509_get_subject_name(cert), buf,
629 sizeof(buf));
630 wpa_printf(MSG_DEBUG, "OpenSSL: Loaded CA certificate for "
631 "system certificate store: subject='%s'", buf);
632
633 if (!X509_STORE_add_cert(SSL_CTX_get_cert_store(ssl_ctx),
634 cert)) {
635 tls_show_errors(MSG_WARNING, __func__,
636 "Failed to add ca_cert to OpenSSL "
637 "certificate store");
638 }
639
640 X509_free(cert);
641 }
642
643 if (!CertCloseStore(cs, 0)) {
644 wpa_printf(MSG_DEBUG, "%s: failed to close system cert store "
645 "'%s': error=%d", __func__, name + 13,
646 (int) GetLastError());
647 }
648
649 return 0;
650 }
651
652
653 #else /* CONFIG_NATIVE_WINDOWS */
654
tls_cryptoapi_cert(SSL * ssl,const char * name)655 static int tls_cryptoapi_cert(SSL *ssl, const char *name)
656 {
657 return -1;
658 }
659
660 #endif /* CONFIG_NATIVE_WINDOWS */
661
662
ssl_info_cb(const SSL * ssl,int where,int ret)663 static void ssl_info_cb(const SSL *ssl, int where, int ret)
664 {
665 const char *str;
666 int w;
667
668 wpa_printf(MSG_DEBUG, "SSL: (where=0x%x ret=0x%x)", where, ret);
669 w = where & ~SSL_ST_MASK;
670 if (w & SSL_ST_CONNECT)
671 str = "SSL_connect";
672 else if (w & SSL_ST_ACCEPT)
673 str = "SSL_accept";
674 else
675 str = "undefined";
676
677 if (where & SSL_CB_LOOP) {
678 wpa_printf(MSG_DEBUG, "SSL: %s:%s",
679 str, SSL_state_string_long(ssl));
680 } else if (where & SSL_CB_ALERT) {
681 struct tls_connection *conn = SSL_get_app_data((SSL *) ssl);
682 wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s",
683 where & SSL_CB_READ ?
684 "read (remote end reported an error)" :
685 "write (local SSL3 detected an error)",
686 SSL_alert_type_string_long(ret),
687 SSL_alert_desc_string_long(ret));
688 if ((ret >> 8) == SSL3_AL_FATAL) {
689 if (where & SSL_CB_READ)
690 conn->read_alerts++;
691 else
692 conn->write_alerts++;
693 }
694 if (conn->context->event_cb != NULL) {
695 union tls_event_data ev;
696 struct tls_context *context = conn->context;
697 os_memset(&ev, 0, sizeof(ev));
698 ev.alert.is_local = !(where & SSL_CB_READ);
699 ev.alert.type = SSL_alert_type_string_long(ret);
700 ev.alert.description = SSL_alert_desc_string_long(ret);
701 context->event_cb(context->cb_ctx, TLS_ALERT, &ev);
702 }
703 } else if (where & SSL_CB_EXIT && ret <= 0) {
704 wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s",
705 str, ret == 0 ? "failed" : "error",
706 SSL_state_string_long(ssl));
707 }
708 }
709
710
711 #ifndef OPENSSL_NO_ENGINE
712 /**
713 * tls_engine_load_dynamic_generic - load any openssl engine
714 * @pre: an array of commands and values that load an engine initialized
715 * in the engine specific function
716 * @post: an array of commands and values that initialize an already loaded
717 * engine (or %NULL if not required)
718 * @id: the engine id of the engine to load (only required if post is not %NULL
719 *
720 * This function is a generic function that loads any openssl engine.
721 *
722 * Returns: 0 on success, -1 on failure
723 */
tls_engine_load_dynamic_generic(const char * pre[],const char * post[],const char * id)724 static int tls_engine_load_dynamic_generic(const char *pre[],
725 const char *post[], const char *id)
726 {
727 ENGINE *engine;
728 const char *dynamic_id = "dynamic";
729
730 engine = ENGINE_by_id(id);
731 if (engine) {
732 wpa_printf(MSG_DEBUG, "ENGINE: engine '%s' is already "
733 "available", id);
734 /*
735 * If it was auto-loaded by ENGINE_by_id() we might still
736 * need to tell it which PKCS#11 module to use in legacy
737 * (non-p11-kit) environments. Do so now; even if it was
738 * properly initialised before, setting it again will be
739 * harmless.
740 */
741 goto found;
742 }
743 ERR_clear_error();
744
745 engine = ENGINE_by_id(dynamic_id);
746 if (engine == NULL) {
747 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
748 dynamic_id,
749 ERR_error_string(ERR_get_error(), NULL));
750 return -1;
751 }
752
753 /* Perform the pre commands. This will load the engine. */
754 while (pre && pre[0]) {
755 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", pre[0], pre[1]);
756 if (ENGINE_ctrl_cmd_string(engine, pre[0], pre[1], 0) == 0) {
757 wpa_printf(MSG_INFO, "ENGINE: ctrl cmd_string failed: "
758 "%s %s [%s]", pre[0], pre[1],
759 ERR_error_string(ERR_get_error(), NULL));
760 ENGINE_free(engine);
761 return -1;
762 }
763 pre += 2;
764 }
765
766 /*
767 * Free the reference to the "dynamic" engine. The loaded engine can
768 * now be looked up using ENGINE_by_id().
769 */
770 ENGINE_free(engine);
771
772 engine = ENGINE_by_id(id);
773 if (engine == NULL) {
774 wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
775 id, ERR_error_string(ERR_get_error(), NULL));
776 return -1;
777 }
778 found:
779 while (post && post[0]) {
780 wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", post[0], post[1]);
781 if (ENGINE_ctrl_cmd_string(engine, post[0], post[1], 0) == 0) {
782 wpa_printf(MSG_DEBUG, "ENGINE: ctrl cmd_string failed:"
783 " %s %s [%s]", post[0], post[1],
784 ERR_error_string(ERR_get_error(), NULL));
785 ENGINE_remove(engine);
786 ENGINE_free(engine);
787 return -1;
788 }
789 post += 2;
790 }
791 ENGINE_free(engine);
792
793 return 0;
794 }
795
796
797 /**
798 * tls_engine_load_dynamic_pkcs11 - load the pkcs11 engine provided by opensc
799 * @pkcs11_so_path: pksc11_so_path from the configuration
800 * @pcks11_module_path: pkcs11_module_path from the configuration
801 */
tls_engine_load_dynamic_pkcs11(const char * pkcs11_so_path,const char * pkcs11_module_path)802 static int tls_engine_load_dynamic_pkcs11(const char *pkcs11_so_path,
803 const char *pkcs11_module_path)
804 {
805 char *engine_id = "pkcs11";
806 const char *pre_cmd[] = {
807 "SO_PATH", NULL /* pkcs11_so_path */,
808 "ID", NULL /* engine_id */,
809 "LIST_ADD", "1",
810 /* "NO_VCHECK", "1", */
811 "LOAD", NULL,
812 NULL, NULL
813 };
814 const char *post_cmd[] = {
815 "MODULE_PATH", NULL /* pkcs11_module_path */,
816 NULL, NULL
817 };
818
819 if (!pkcs11_so_path)
820 return 0;
821
822 pre_cmd[1] = pkcs11_so_path;
823 pre_cmd[3] = engine_id;
824 if (pkcs11_module_path)
825 post_cmd[1] = pkcs11_module_path;
826 else
827 post_cmd[0] = NULL;
828
829 wpa_printf(MSG_DEBUG, "ENGINE: Loading pkcs11 Engine from %s",
830 pkcs11_so_path);
831
832 return tls_engine_load_dynamic_generic(pre_cmd, post_cmd, engine_id);
833 }
834
835
836 /**
837 * tls_engine_load_dynamic_opensc - load the opensc engine provided by opensc
838 * @opensc_so_path: opensc_so_path from the configuration
839 */
tls_engine_load_dynamic_opensc(const char * opensc_so_path)840 static int tls_engine_load_dynamic_opensc(const char *opensc_so_path)
841 {
842 char *engine_id = "opensc";
843 const char *pre_cmd[] = {
844 "SO_PATH", NULL /* opensc_so_path */,
845 "ID", NULL /* engine_id */,
846 "LIST_ADD", "1",
847 "LOAD", NULL,
848 NULL, NULL
849 };
850
851 if (!opensc_so_path)
852 return 0;
853
854 pre_cmd[1] = opensc_so_path;
855 pre_cmd[3] = engine_id;
856
857 wpa_printf(MSG_DEBUG, "ENGINE: Loading OpenSC Engine from %s",
858 opensc_so_path);
859
860 return tls_engine_load_dynamic_generic(pre_cmd, NULL, engine_id);
861 }
862 #endif /* OPENSSL_NO_ENGINE */
863
864
remove_session_cb(SSL_CTX * ctx,SSL_SESSION * sess)865 static void remove_session_cb(SSL_CTX *ctx, SSL_SESSION *sess)
866 {
867 struct wpabuf *buf;
868
869 if (tls_ex_idx_session < 0)
870 return;
871 buf = SSL_SESSION_get_ex_data(sess, tls_ex_idx_session);
872 if (!buf)
873 return;
874 wpa_printf(MSG_DEBUG,
875 "OpenSSL: Free application session data %p (sess %p)",
876 buf, sess);
877 wpabuf_free(buf);
878
879 SSL_SESSION_set_ex_data(sess, tls_ex_idx_session, NULL);
880 }
881
882
tls_init(const struct tls_config * conf)883 void * tls_init(const struct tls_config *conf)
884 {
885 struct tls_data *data;
886 SSL_CTX *ssl;
887 struct tls_context *context;
888 const char *ciphers;
889
890 if (tls_openssl_ref_count == 0) {
891 tls_global = context = tls_context_new(conf);
892 if (context == NULL)
893 return NULL;
894 #ifdef CONFIG_FIPS
895 #ifdef OPENSSL_FIPS
896 if (conf && conf->fips_mode) {
897 static int fips_enabled = 0;
898
899 if (!fips_enabled && !FIPS_mode_set(1)) {
900 wpa_printf(MSG_ERROR, "Failed to enable FIPS "
901 "mode");
902 ERR_load_crypto_strings();
903 ERR_print_errors_fp(stderr);
904 os_free(tls_global);
905 tls_global = NULL;
906 return NULL;
907 } else {
908 wpa_printf(MSG_INFO, "Running in FIPS mode");
909 fips_enabled = 1;
910 }
911 }
912 #else /* OPENSSL_FIPS */
913 if (conf && conf->fips_mode) {
914 wpa_printf(MSG_ERROR, "FIPS mode requested, but not "
915 "supported");
916 os_free(tls_global);
917 tls_global = NULL;
918 return NULL;
919 }
920 #endif /* OPENSSL_FIPS */
921 #endif /* CONFIG_FIPS */
922 #if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
923 SSL_load_error_strings();
924 SSL_library_init();
925 #ifndef OPENSSL_NO_SHA256
926 EVP_add_digest(EVP_sha256());
927 #endif /* OPENSSL_NO_SHA256 */
928 /* TODO: if /dev/urandom is available, PRNG is seeded
929 * automatically. If this is not the case, random data should
930 * be added here. */
931
932 #ifdef PKCS12_FUNCS
933 #ifndef OPENSSL_NO_RC2
934 /*
935 * 40-bit RC2 is commonly used in PKCS#12 files, so enable it.
936 * This is enabled by PKCS12_PBE_add() in OpenSSL 0.9.8
937 * versions, but it looks like OpenSSL 1.0.0 does not do that
938 * anymore.
939 */
940 EVP_add_cipher(EVP_rc2_40_cbc());
941 #endif /* OPENSSL_NO_RC2 */
942 PKCS12_PBE_add();
943 #endif /* PKCS12_FUNCS */
944 #endif /* < 1.1.0 */
945 } else {
946 context = tls_context_new(conf);
947 if (context == NULL)
948 return NULL;
949 }
950 tls_openssl_ref_count++;
951
952 data = os_zalloc(sizeof(*data));
953 if (data)
954 ssl = SSL_CTX_new(SSLv23_method());
955 else
956 ssl = NULL;
957 if (ssl == NULL) {
958 tls_openssl_ref_count--;
959 if (context != tls_global)
960 os_free(context);
961 if (tls_openssl_ref_count == 0) {
962 os_free(tls_global);
963 tls_global = NULL;
964 }
965 os_free(data);
966 return NULL;
967 }
968 data->ssl = ssl;
969 if (conf)
970 data->tls_session_lifetime = conf->tls_session_lifetime;
971
972 SSL_CTX_set_options(ssl, SSL_OP_NO_SSLv2);
973 SSL_CTX_set_options(ssl, SSL_OP_NO_SSLv3);
974
975 #ifdef SSL_MODE_NO_AUTO_CHAIN
976 /* Number of deployed use cases assume the default OpenSSL behavior of
977 * auto chaining the local certificate is in use. BoringSSL removed this
978 * functionality by default, so we need to restore it here to avoid
979 * breaking existing use cases. */
980 SSL_CTX_clear_mode(ssl, SSL_MODE_NO_AUTO_CHAIN);
981 #endif /* SSL_MODE_NO_AUTO_CHAIN */
982
983 SSL_CTX_set_info_callback(ssl, ssl_info_cb);
984 SSL_CTX_set_app_data(ssl, context);
985 if (data->tls_session_lifetime > 0) {
986 SSL_CTX_set_quiet_shutdown(ssl, 1);
987 /*
988 * Set default context here. In practice, this will be replaced
989 * by the per-EAP method context in tls_connection_set_verify().
990 */
991 SSL_CTX_set_session_id_context(ssl, (u8 *) "hostapd", 7);
992 SSL_CTX_set_session_cache_mode(ssl, SSL_SESS_CACHE_SERVER);
993 SSL_CTX_set_timeout(ssl, data->tls_session_lifetime);
994 SSL_CTX_sess_set_remove_cb(ssl, remove_session_cb);
995 } else {
996 SSL_CTX_set_session_cache_mode(ssl, SSL_SESS_CACHE_OFF);
997 }
998
999 if (tls_ex_idx_session < 0) {
1000 tls_ex_idx_session = SSL_SESSION_get_ex_new_index(
1001 0, NULL, NULL, NULL, NULL);
1002 if (tls_ex_idx_session < 0) {
1003 tls_deinit(data);
1004 return NULL;
1005 }
1006 }
1007
1008 #ifndef OPENSSL_NO_ENGINE
1009 wpa_printf(MSG_DEBUG, "ENGINE: Loading dynamic engine");
1010 ERR_load_ENGINE_strings();
1011 ENGINE_load_dynamic();
1012
1013 if (conf &&
1014 (conf->opensc_engine_path || conf->pkcs11_engine_path ||
1015 conf->pkcs11_module_path)) {
1016 if (tls_engine_load_dynamic_opensc(conf->opensc_engine_path) ||
1017 tls_engine_load_dynamic_pkcs11(conf->pkcs11_engine_path,
1018 conf->pkcs11_module_path)) {
1019 tls_deinit(data);
1020 return NULL;
1021 }
1022 }
1023 #endif /* OPENSSL_NO_ENGINE */
1024
1025 if (conf && conf->openssl_ciphers)
1026 ciphers = conf->openssl_ciphers;
1027 else
1028 ciphers = "DEFAULT:!EXP:!LOW";
1029 if (SSL_CTX_set_cipher_list(ssl, ciphers) != 1) {
1030 wpa_printf(MSG_ERROR,
1031 "OpenSSL: Failed to set cipher string '%s'",
1032 ciphers);
1033 tls_deinit(data);
1034 return NULL;
1035 }
1036
1037 return data;
1038 }
1039
1040
tls_deinit(void * ssl_ctx)1041 void tls_deinit(void *ssl_ctx)
1042 {
1043 struct tls_data *data = ssl_ctx;
1044 SSL_CTX *ssl = data->ssl;
1045 struct tls_context *context = SSL_CTX_get_app_data(ssl);
1046 if (context != tls_global)
1047 os_free(context);
1048 if (data->tls_session_lifetime > 0)
1049 SSL_CTX_flush_sessions(ssl, 0);
1050 SSL_CTX_free(ssl);
1051
1052 tls_openssl_ref_count--;
1053 if (tls_openssl_ref_count == 0) {
1054 #if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
1055 #ifndef OPENSSL_NO_ENGINE
1056 ENGINE_cleanup();
1057 #endif /* OPENSSL_NO_ENGINE */
1058 CRYPTO_cleanup_all_ex_data();
1059 ERR_remove_thread_state(NULL);
1060 ERR_free_strings();
1061 EVP_cleanup();
1062 #endif /* < 1.1.0 */
1063 os_free(tls_global->ocsp_stapling_response);
1064 tls_global->ocsp_stapling_response = NULL;
1065 os_free(tls_global);
1066 tls_global = NULL;
1067 }
1068
1069 os_free(data);
1070 }
1071
1072
1073 #ifndef OPENSSL_NO_ENGINE
1074
1075 /* Cryptoki return values */
1076 #define CKR_PIN_INCORRECT 0x000000a0
1077 #define CKR_PIN_INVALID 0x000000a1
1078 #define CKR_PIN_LEN_RANGE 0x000000a2
1079
1080 /* libp11 */
1081 #define ERR_LIB_PKCS11 ERR_LIB_USER
1082
tls_is_pin_error(unsigned int err)1083 static int tls_is_pin_error(unsigned int err)
1084 {
1085 return ERR_GET_LIB(err) == ERR_LIB_PKCS11 &&
1086 (ERR_GET_REASON(err) == CKR_PIN_INCORRECT ||
1087 ERR_GET_REASON(err) == CKR_PIN_INVALID ||
1088 ERR_GET_REASON(err) == CKR_PIN_LEN_RANGE);
1089 }
1090
1091 #endif /* OPENSSL_NO_ENGINE */
1092
1093
1094 #ifdef ANDROID
1095 /* EVP_PKEY_from_keystore comes from system/security/keystore-engine. */
1096 EVP_PKEY * EVP_PKEY_from_keystore(const char *key_id);
1097 #endif /* ANDROID */
1098
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)1099 static int tls_engine_init(struct tls_connection *conn, const char *engine_id,
1100 const char *pin, const char *key_id,
1101 const char *cert_id, const char *ca_cert_id)
1102 {
1103 #if defined(ANDROID) && defined(OPENSSL_IS_BORINGSSL)
1104 #if !defined(OPENSSL_NO_ENGINE)
1105 #error "This code depends on OPENSSL_NO_ENGINE being defined by BoringSSL."
1106 #endif
1107 if (!key_id)
1108 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
1109 conn->engine = NULL;
1110 conn->private_key = EVP_PKEY_from_keystore(key_id);
1111 if (!conn->private_key) {
1112 wpa_printf(MSG_ERROR,
1113 "ENGINE: cannot load private key with id '%s' [%s]",
1114 key_id,
1115 ERR_error_string(ERR_get_error(), NULL));
1116 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
1117 }
1118 #endif /* ANDROID && OPENSSL_IS_BORINGSSL */
1119
1120 #ifndef OPENSSL_NO_ENGINE
1121 int ret = -1;
1122 if (engine_id == NULL) {
1123 wpa_printf(MSG_ERROR, "ENGINE: Engine ID not set");
1124 return -1;
1125 }
1126
1127 ERR_clear_error();
1128 #ifdef ANDROID
1129 ENGINE_load_dynamic();
1130 #endif
1131 conn->engine = ENGINE_by_id(engine_id);
1132 if (!conn->engine) {
1133 wpa_printf(MSG_ERROR, "ENGINE: engine %s not available [%s]",
1134 engine_id, ERR_error_string(ERR_get_error(), NULL));
1135 goto err;
1136 }
1137 if (ENGINE_init(conn->engine) != 1) {
1138 wpa_printf(MSG_ERROR, "ENGINE: engine init failed "
1139 "(engine: %s) [%s]", engine_id,
1140 ERR_error_string(ERR_get_error(), NULL));
1141 goto err;
1142 }
1143 wpa_printf(MSG_DEBUG, "ENGINE: engine initialized");
1144
1145 #ifndef ANDROID
1146 if (pin && ENGINE_ctrl_cmd_string(conn->engine, "PIN", pin, 0) == 0) {
1147 wpa_printf(MSG_ERROR, "ENGINE: cannot set pin [%s]",
1148 ERR_error_string(ERR_get_error(), NULL));
1149 goto err;
1150 }
1151 #endif
1152 if (key_id) {
1153 /*
1154 * Ensure that the ENGINE does not attempt to use the OpenSSL
1155 * UI system to obtain a PIN, if we didn't provide one.
1156 */
1157 struct {
1158 const void *password;
1159 const char *prompt_info;
1160 } key_cb = { "", NULL };
1161
1162 /* load private key first in-case PIN is required for cert */
1163 conn->private_key = ENGINE_load_private_key(conn->engine,
1164 key_id, NULL,
1165 &key_cb);
1166 if (!conn->private_key) {
1167 unsigned long err = ERR_get_error();
1168
1169 wpa_printf(MSG_ERROR,
1170 "ENGINE: cannot load private key with id '%s' [%s]",
1171 key_id,
1172 ERR_error_string(err, NULL));
1173 if (tls_is_pin_error(err))
1174 ret = TLS_SET_PARAMS_ENGINE_PRV_BAD_PIN;
1175 else
1176 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
1177 goto err;
1178 }
1179 }
1180
1181 /* handle a certificate and/or CA certificate */
1182 if (cert_id || ca_cert_id) {
1183 const char *cmd_name = "LOAD_CERT_CTRL";
1184
1185 /* test if the engine supports a LOAD_CERT_CTRL */
1186 if (!ENGINE_ctrl(conn->engine, ENGINE_CTRL_GET_CMD_FROM_NAME,
1187 0, (void *)cmd_name, NULL)) {
1188 wpa_printf(MSG_ERROR, "ENGINE: engine does not support"
1189 " loading certificates");
1190 ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
1191 goto err;
1192 }
1193 }
1194
1195 return 0;
1196
1197 err:
1198 if (conn->engine) {
1199 ENGINE_free(conn->engine);
1200 conn->engine = NULL;
1201 }
1202
1203 if (conn->private_key) {
1204 EVP_PKEY_free(conn->private_key);
1205 conn->private_key = NULL;
1206 }
1207
1208 return ret;
1209 #else /* OPENSSL_NO_ENGINE */
1210 return 0;
1211 #endif /* OPENSSL_NO_ENGINE */
1212 }
1213
1214
tls_engine_deinit(struct tls_connection * conn)1215 static void tls_engine_deinit(struct tls_connection *conn)
1216 {
1217 #if defined(ANDROID) || !defined(OPENSSL_NO_ENGINE)
1218 wpa_printf(MSG_DEBUG, "ENGINE: engine deinit");
1219 if (conn->private_key) {
1220 EVP_PKEY_free(conn->private_key);
1221 conn->private_key = NULL;
1222 }
1223 if (conn->engine) {
1224 #if !defined(OPENSSL_IS_BORINGSSL)
1225 ENGINE_finish(conn->engine);
1226 #endif /* !OPENSSL_IS_BORINGSSL */
1227 conn->engine = NULL;
1228 }
1229 #endif /* ANDROID || !OPENSSL_NO_ENGINE */
1230 }
1231
1232
tls_get_errors(void * ssl_ctx)1233 int tls_get_errors(void *ssl_ctx)
1234 {
1235 int count = 0;
1236 unsigned long err;
1237
1238 while ((err = ERR_get_error())) {
1239 wpa_printf(MSG_INFO, "TLS - SSL error: %s",
1240 ERR_error_string(err, NULL));
1241 count++;
1242 }
1243
1244 return count;
1245 }
1246
1247
openssl_content_type(int content_type)1248 static const char * openssl_content_type(int content_type)
1249 {
1250 switch (content_type) {
1251 case 20:
1252 return "change cipher spec";
1253 case 21:
1254 return "alert";
1255 case 22:
1256 return "handshake";
1257 case 23:
1258 return "application data";
1259 case 24:
1260 return "heartbeat";
1261 case 256:
1262 return "TLS header info"; /* pseudo content type */
1263 default:
1264 return "?";
1265 }
1266 }
1267
1268
openssl_handshake_type(int content_type,const u8 * buf,size_t len)1269 static const char * openssl_handshake_type(int content_type, const u8 *buf,
1270 size_t len)
1271 {
1272 if (content_type != 22 || !buf || len == 0)
1273 return "";
1274 switch (buf[0]) {
1275 case 0:
1276 return "hello request";
1277 case 1:
1278 return "client hello";
1279 case 2:
1280 return "server hello";
1281 case 4:
1282 return "new session ticket";
1283 case 11:
1284 return "certificate";
1285 case 12:
1286 return "server key exchange";
1287 case 13:
1288 return "certificate request";
1289 case 14:
1290 return "server hello done";
1291 case 15:
1292 return "certificate verify";
1293 case 16:
1294 return "client key exchange";
1295 case 20:
1296 return "finished";
1297 case 21:
1298 return "certificate url";
1299 case 22:
1300 return "certificate status";
1301 default:
1302 return "?";
1303 }
1304 }
1305
1306
tls_msg_cb(int write_p,int version,int content_type,const void * buf,size_t len,SSL * ssl,void * arg)1307 static void tls_msg_cb(int write_p, int version, int content_type,
1308 const void *buf, size_t len, SSL *ssl, void *arg)
1309 {
1310 struct tls_connection *conn = arg;
1311 const u8 *pos = buf;
1312
1313 if (write_p == 2) {
1314 wpa_printf(MSG_DEBUG,
1315 "OpenSSL: session ver=0x%x content_type=%d",
1316 version, content_type);
1317 wpa_hexdump_key(MSG_MSGDUMP, "OpenSSL: Data", buf, len);
1318 return;
1319 }
1320
1321 wpa_printf(MSG_DEBUG, "OpenSSL: %s ver=0x%x content_type=%d (%s/%s)",
1322 write_p ? "TX" : "RX", version, content_type,
1323 openssl_content_type(content_type),
1324 openssl_handshake_type(content_type, buf, len));
1325 wpa_hexdump_key(MSG_MSGDUMP, "OpenSSL: Message", buf, len);
1326 if (content_type == 24 && len >= 3 && pos[0] == 1) {
1327 size_t payload_len = WPA_GET_BE16(pos + 1);
1328 if (payload_len + 3 > len) {
1329 wpa_printf(MSG_ERROR, "OpenSSL: Heartbeat attack detected");
1330 conn->invalid_hb_used = 1;
1331 }
1332 }
1333 }
1334
1335
tls_connection_init(void * ssl_ctx)1336 struct tls_connection * tls_connection_init(void *ssl_ctx)
1337 {
1338 struct tls_data *data = ssl_ctx;
1339 SSL_CTX *ssl = data->ssl;
1340 struct tls_connection *conn;
1341 long options;
1342 struct tls_context *context = SSL_CTX_get_app_data(ssl);
1343
1344 conn = os_zalloc(sizeof(*conn));
1345 if (conn == NULL)
1346 return NULL;
1347 conn->ssl_ctx = ssl;
1348 conn->ssl = SSL_new(ssl);
1349 if (conn->ssl == NULL) {
1350 tls_show_errors(MSG_INFO, __func__,
1351 "Failed to initialize new SSL connection");
1352 os_free(conn);
1353 return NULL;
1354 }
1355
1356 conn->context = context;
1357 SSL_set_app_data(conn->ssl, conn);
1358 SSL_set_msg_callback(conn->ssl, tls_msg_cb);
1359 SSL_set_msg_callback_arg(conn->ssl, conn);
1360 options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 |
1361 SSL_OP_SINGLE_DH_USE;
1362 #ifdef SSL_OP_NO_COMPRESSION
1363 options |= SSL_OP_NO_COMPRESSION;
1364 #endif /* SSL_OP_NO_COMPRESSION */
1365 SSL_set_options(conn->ssl, options);
1366
1367 conn->ssl_in = BIO_new(BIO_s_mem());
1368 if (!conn->ssl_in) {
1369 tls_show_errors(MSG_INFO, __func__,
1370 "Failed to create a new BIO for ssl_in");
1371 SSL_free(conn->ssl);
1372 os_free(conn);
1373 return NULL;
1374 }
1375
1376 conn->ssl_out = BIO_new(BIO_s_mem());
1377 if (!conn->ssl_out) {
1378 tls_show_errors(MSG_INFO, __func__,
1379 "Failed to create a new BIO for ssl_out");
1380 SSL_free(conn->ssl);
1381 BIO_free(conn->ssl_in);
1382 os_free(conn);
1383 return NULL;
1384 }
1385
1386 SSL_set_bio(conn->ssl, conn->ssl_in, conn->ssl_out);
1387
1388 return conn;
1389 }
1390
1391
tls_connection_deinit(void * ssl_ctx,struct tls_connection * conn)1392 void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn)
1393 {
1394 if (conn == NULL)
1395 return;
1396 if (conn->success_data) {
1397 /*
1398 * Make sure ssl_clear_bad_session() does not remove this
1399 * session.
1400 */
1401 SSL_set_quiet_shutdown(conn->ssl, 1);
1402 SSL_shutdown(conn->ssl);
1403 }
1404 SSL_free(conn->ssl);
1405 tls_engine_deinit(conn);
1406 os_free(conn->subject_match);
1407 os_free(conn->altsubject_match);
1408 os_free(conn->suffix_match);
1409 os_free(conn->domain_match);
1410 os_free(conn->session_ticket);
1411 os_free(conn);
1412 }
1413
1414
tls_connection_established(void * ssl_ctx,struct tls_connection * conn)1415 int tls_connection_established(void *ssl_ctx, struct tls_connection *conn)
1416 {
1417 return conn ? SSL_is_init_finished(conn->ssl) : 0;
1418 }
1419
1420
tls_connection_shutdown(void * ssl_ctx,struct tls_connection * conn)1421 int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn)
1422 {
1423 if (conn == NULL)
1424 return -1;
1425
1426 /* Shutdown previous TLS connection without notifying the peer
1427 * because the connection was already terminated in practice
1428 * and "close notify" shutdown alert would confuse AS. */
1429 SSL_set_quiet_shutdown(conn->ssl, 1);
1430 SSL_shutdown(conn->ssl);
1431 return SSL_clear(conn->ssl) == 1 ? 0 : -1;
1432 }
1433
1434
tls_match_altsubject_component(X509 * cert,int type,const char * value,size_t len)1435 static int tls_match_altsubject_component(X509 *cert, int type,
1436 const char *value, size_t len)
1437 {
1438 GENERAL_NAME *gen;
1439 void *ext;
1440 int found = 0;
1441 stack_index_t i;
1442
1443 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
1444
1445 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
1446 gen = sk_GENERAL_NAME_value(ext, i);
1447 if (gen->type != type)
1448 continue;
1449 if (os_strlen((char *) gen->d.ia5->data) == len &&
1450 os_memcmp(value, gen->d.ia5->data, len) == 0)
1451 found++;
1452 }
1453
1454 sk_GENERAL_NAME_pop_free(ext, GENERAL_NAME_free);
1455
1456 return found;
1457 }
1458
1459
tls_match_altsubject(X509 * cert,const char * match)1460 static int tls_match_altsubject(X509 *cert, const char *match)
1461 {
1462 int type;
1463 const char *pos, *end;
1464 size_t len;
1465
1466 pos = match;
1467 do {
1468 if (os_strncmp(pos, "EMAIL:", 6) == 0) {
1469 type = GEN_EMAIL;
1470 pos += 6;
1471 } else if (os_strncmp(pos, "DNS:", 4) == 0) {
1472 type = GEN_DNS;
1473 pos += 4;
1474 } else if (os_strncmp(pos, "URI:", 4) == 0) {
1475 type = GEN_URI;
1476 pos += 4;
1477 } else {
1478 wpa_printf(MSG_INFO, "TLS: Invalid altSubjectName "
1479 "match '%s'", pos);
1480 return 0;
1481 }
1482 end = os_strchr(pos, ';');
1483 while (end) {
1484 if (os_strncmp(end + 1, "EMAIL:", 6) == 0 ||
1485 os_strncmp(end + 1, "DNS:", 4) == 0 ||
1486 os_strncmp(end + 1, "URI:", 4) == 0)
1487 break;
1488 end = os_strchr(end + 1, ';');
1489 }
1490 if (end)
1491 len = end - pos;
1492 else
1493 len = os_strlen(pos);
1494 if (tls_match_altsubject_component(cert, type, pos, len) > 0)
1495 return 1;
1496 pos = end + 1;
1497 } while (end);
1498
1499 return 0;
1500 }
1501
1502
1503 #ifndef CONFIG_NATIVE_WINDOWS
domain_suffix_match(const u8 * val,size_t len,const char * match,int full)1504 static int domain_suffix_match(const u8 *val, size_t len, const char *match,
1505 int full)
1506 {
1507 size_t i, match_len;
1508
1509 /* Check for embedded nuls that could mess up suffix matching */
1510 for (i = 0; i < len; i++) {
1511 if (val[i] == '\0') {
1512 wpa_printf(MSG_DEBUG, "TLS: Embedded null in a string - reject");
1513 return 0;
1514 }
1515 }
1516
1517 match_len = os_strlen(match);
1518 if (match_len > len || (full && match_len != len))
1519 return 0;
1520
1521 if (os_strncasecmp((const char *) val + len - match_len, match,
1522 match_len) != 0)
1523 return 0; /* no match */
1524
1525 if (match_len == len)
1526 return 1; /* exact match */
1527
1528 if (val[len - match_len - 1] == '.')
1529 return 1; /* full label match completes suffix match */
1530
1531 wpa_printf(MSG_DEBUG, "TLS: Reject due to incomplete label match");
1532 return 0;
1533 }
1534 #endif /* CONFIG_NATIVE_WINDOWS */
1535
1536
tls_match_suffix(X509 * cert,const char * match,int full)1537 static int tls_match_suffix(X509 *cert, const char *match, int full)
1538 {
1539 #ifdef CONFIG_NATIVE_WINDOWS
1540 /* wincrypt.h has conflicting X509_NAME definition */
1541 return -1;
1542 #else /* CONFIG_NATIVE_WINDOWS */
1543 GENERAL_NAME *gen;
1544 void *ext;
1545 int i;
1546 stack_index_t j;
1547 int dns_name = 0;
1548 X509_NAME *name;
1549
1550 wpa_printf(MSG_DEBUG, "TLS: Match domain against %s%s",
1551 full ? "": "suffix ", match);
1552
1553 ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
1554
1555 for (j = 0; ext && j < sk_GENERAL_NAME_num(ext); j++) {
1556 gen = sk_GENERAL_NAME_value(ext, j);
1557 if (gen->type != GEN_DNS)
1558 continue;
1559 dns_name++;
1560 wpa_hexdump_ascii(MSG_DEBUG, "TLS: Certificate dNSName",
1561 gen->d.dNSName->data,
1562 gen->d.dNSName->length);
1563 if (domain_suffix_match(gen->d.dNSName->data,
1564 gen->d.dNSName->length, match, full) ==
1565 1) {
1566 wpa_printf(MSG_DEBUG, "TLS: %s in dNSName found",
1567 full ? "Match" : "Suffix match");
1568 sk_GENERAL_NAME_pop_free(ext, GENERAL_NAME_free);
1569 return 1;
1570 }
1571 }
1572 sk_GENERAL_NAME_pop_free(ext, GENERAL_NAME_free);
1573
1574 if (dns_name) {
1575 wpa_printf(MSG_DEBUG, "TLS: None of the dNSName(s) matched");
1576 return 0;
1577 }
1578
1579 name = X509_get_subject_name(cert);
1580 i = -1;
1581 for (;;) {
1582 X509_NAME_ENTRY *e;
1583 ASN1_STRING *cn;
1584
1585 i = X509_NAME_get_index_by_NID(name, NID_commonName, i);
1586 if (i == -1)
1587 break;
1588 e = X509_NAME_get_entry(name, i);
1589 if (e == NULL)
1590 continue;
1591 cn = X509_NAME_ENTRY_get_data(e);
1592 if (cn == NULL)
1593 continue;
1594 wpa_hexdump_ascii(MSG_DEBUG, "TLS: Certificate commonName",
1595 cn->data, cn->length);
1596 if (domain_suffix_match(cn->data, cn->length, match, full) == 1)
1597 {
1598 wpa_printf(MSG_DEBUG, "TLS: %s in commonName found",
1599 full ? "Match" : "Suffix match");
1600 return 1;
1601 }
1602 }
1603
1604 wpa_printf(MSG_DEBUG, "TLS: No CommonName %smatch found",
1605 full ? "": "suffix ");
1606 return 0;
1607 #endif /* CONFIG_NATIVE_WINDOWS */
1608 }
1609
1610
openssl_tls_fail_reason(int err)1611 static enum tls_fail_reason openssl_tls_fail_reason(int err)
1612 {
1613 switch (err) {
1614 case X509_V_ERR_CERT_REVOKED:
1615 return TLS_FAIL_REVOKED;
1616 case X509_V_ERR_CERT_NOT_YET_VALID:
1617 case X509_V_ERR_CRL_NOT_YET_VALID:
1618 return TLS_FAIL_NOT_YET_VALID;
1619 case X509_V_ERR_CERT_HAS_EXPIRED:
1620 case X509_V_ERR_CRL_HAS_EXPIRED:
1621 return TLS_FAIL_EXPIRED;
1622 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
1623 case X509_V_ERR_UNABLE_TO_GET_CRL:
1624 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
1625 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
1626 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
1627 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
1628 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
1629 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
1630 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
1631 case X509_V_ERR_INVALID_CA:
1632 return TLS_FAIL_UNTRUSTED;
1633 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
1634 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
1635 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
1636 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
1637 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
1638 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
1639 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
1640 case X509_V_ERR_CERT_UNTRUSTED:
1641 case X509_V_ERR_CERT_REJECTED:
1642 return TLS_FAIL_BAD_CERTIFICATE;
1643 default:
1644 return TLS_FAIL_UNSPECIFIED;
1645 }
1646 }
1647
1648
get_x509_cert(X509 * cert)1649 static struct wpabuf * get_x509_cert(X509 *cert)
1650 {
1651 struct wpabuf *buf;
1652 u8 *tmp;
1653
1654 int cert_len = i2d_X509(cert, NULL);
1655 if (cert_len <= 0)
1656 return NULL;
1657
1658 buf = wpabuf_alloc(cert_len);
1659 if (buf == NULL)
1660 return NULL;
1661
1662 tmp = wpabuf_put(buf, cert_len);
1663 i2d_X509(cert, &tmp);
1664 return buf;
1665 }
1666
1667
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)1668 static void openssl_tls_fail_event(struct tls_connection *conn,
1669 X509 *err_cert, int err, int depth,
1670 const char *subject, const char *err_str,
1671 enum tls_fail_reason reason)
1672 {
1673 union tls_event_data ev;
1674 struct wpabuf *cert = NULL;
1675 struct tls_context *context = conn->context;
1676
1677 if (context->event_cb == NULL)
1678 return;
1679
1680 cert = get_x509_cert(err_cert);
1681 os_memset(&ev, 0, sizeof(ev));
1682 ev.cert_fail.reason = reason != TLS_FAIL_UNSPECIFIED ?
1683 reason : openssl_tls_fail_reason(err);
1684 ev.cert_fail.depth = depth;
1685 ev.cert_fail.subject = subject;
1686 ev.cert_fail.reason_txt = err_str;
1687 ev.cert_fail.cert = cert;
1688 context->event_cb(context->cb_ctx, TLS_CERT_CHAIN_FAILURE, &ev);
1689 wpabuf_free(cert);
1690 }
1691
1692
openssl_tls_cert_event(struct tls_connection * conn,X509 * err_cert,int depth,const char * subject)1693 static void openssl_tls_cert_event(struct tls_connection *conn,
1694 X509 *err_cert, int depth,
1695 const char *subject)
1696 {
1697 struct wpabuf *cert = NULL;
1698 union tls_event_data ev;
1699 struct tls_context *context = conn->context;
1700 char *altsubject[TLS_MAX_ALT_SUBJECT];
1701 int alt, num_altsubject = 0;
1702 GENERAL_NAME *gen;
1703 void *ext;
1704 stack_index_t i;
1705 #ifdef CONFIG_SHA256
1706 u8 hash[32];
1707 #endif /* CONFIG_SHA256 */
1708
1709 if (context->event_cb == NULL)
1710 return;
1711
1712 os_memset(&ev, 0, sizeof(ev));
1713 if (conn->cert_probe || (conn->flags & TLS_CONN_EXT_CERT_CHECK) ||
1714 context->cert_in_cb) {
1715 cert = get_x509_cert(err_cert);
1716 ev.peer_cert.cert = cert;
1717 }
1718 #ifdef CONFIG_SHA256
1719 if (cert) {
1720 const u8 *addr[1];
1721 size_t len[1];
1722 addr[0] = wpabuf_head(cert);
1723 len[0] = wpabuf_len(cert);
1724 if (sha256_vector(1, addr, len, hash) == 0) {
1725 ev.peer_cert.hash = hash;
1726 ev.peer_cert.hash_len = sizeof(hash);
1727 }
1728 }
1729 #endif /* CONFIG_SHA256 */
1730 ev.peer_cert.depth = depth;
1731 ev.peer_cert.subject = subject;
1732
1733 ext = X509_get_ext_d2i(err_cert, NID_subject_alt_name, NULL, NULL);
1734 for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
1735 char *pos;
1736
1737 if (num_altsubject == TLS_MAX_ALT_SUBJECT)
1738 break;
1739 gen = sk_GENERAL_NAME_value(ext, i);
1740 if (gen->type != GEN_EMAIL &&
1741 gen->type != GEN_DNS &&
1742 gen->type != GEN_URI)
1743 continue;
1744
1745 pos = os_malloc(10 + gen->d.ia5->length + 1);
1746 if (pos == NULL)
1747 break;
1748 altsubject[num_altsubject++] = pos;
1749
1750 switch (gen->type) {
1751 case GEN_EMAIL:
1752 os_memcpy(pos, "EMAIL:", 6);
1753 pos += 6;
1754 break;
1755 case GEN_DNS:
1756 os_memcpy(pos, "DNS:", 4);
1757 pos += 4;
1758 break;
1759 case GEN_URI:
1760 os_memcpy(pos, "URI:", 4);
1761 pos += 4;
1762 break;
1763 }
1764
1765 os_memcpy(pos, gen->d.ia5->data, gen->d.ia5->length);
1766 pos += gen->d.ia5->length;
1767 *pos = '\0';
1768 }
1769 sk_GENERAL_NAME_pop_free(ext, GENERAL_NAME_free);
1770
1771 for (alt = 0; alt < num_altsubject; alt++)
1772 ev.peer_cert.altsubject[alt] = altsubject[alt];
1773 ev.peer_cert.num_altsubject = num_altsubject;
1774
1775 context->event_cb(context->cb_ctx, TLS_PEER_CERTIFICATE, &ev);
1776 wpabuf_free(cert);
1777 for (alt = 0; alt < num_altsubject; alt++)
1778 os_free(altsubject[alt]);
1779 }
1780
1781
tls_verify_cb(int preverify_ok,X509_STORE_CTX * x509_ctx)1782 static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
1783 {
1784 char buf[256];
1785 X509 *err_cert;
1786 int err, depth;
1787 SSL *ssl;
1788 struct tls_connection *conn;
1789 struct tls_context *context;
1790 char *match, *altmatch, *suffix_match, *domain_match;
1791 const char *err_str;
1792
1793 err_cert = X509_STORE_CTX_get_current_cert(x509_ctx);
1794 if (!err_cert)
1795 return 0;
1796
1797 err = X509_STORE_CTX_get_error(x509_ctx);
1798 depth = X509_STORE_CTX_get_error_depth(x509_ctx);
1799 ssl = X509_STORE_CTX_get_ex_data(x509_ctx,
1800 SSL_get_ex_data_X509_STORE_CTX_idx());
1801 X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf));
1802
1803 conn = SSL_get_app_data(ssl);
1804 if (conn == NULL)
1805 return 0;
1806
1807 if (depth == 0)
1808 conn->peer_cert = err_cert;
1809 else if (depth == 1)
1810 conn->peer_issuer = err_cert;
1811 else if (depth == 2)
1812 conn->peer_issuer_issuer = err_cert;
1813
1814 context = conn->context;
1815 match = conn->subject_match;
1816 altmatch = conn->altsubject_match;
1817 suffix_match = conn->suffix_match;
1818 domain_match = conn->domain_match;
1819
1820 if (!preverify_ok && !conn->ca_cert_verify)
1821 preverify_ok = 1;
1822 if (!preverify_ok && depth > 0 && conn->server_cert_only)
1823 preverify_ok = 1;
1824 if (!preverify_ok && (conn->flags & TLS_CONN_DISABLE_TIME_CHECKS) &&
1825 (err == X509_V_ERR_CERT_HAS_EXPIRED ||
1826 err == X509_V_ERR_CERT_NOT_YET_VALID)) {
1827 wpa_printf(MSG_DEBUG, "OpenSSL: Ignore certificate validity "
1828 "time mismatch");
1829 preverify_ok = 1;
1830 }
1831
1832 err_str = X509_verify_cert_error_string(err);
1833
1834 #ifdef CONFIG_SHA256
1835 /*
1836 * Do not require preverify_ok so we can explicity allow otherwise
1837 * invalid pinned server certificates.
1838 */
1839 if (depth == 0 && conn->server_cert_only) {
1840 struct wpabuf *cert;
1841 cert = get_x509_cert(err_cert);
1842 if (!cert) {
1843 wpa_printf(MSG_DEBUG, "OpenSSL: Could not fetch "
1844 "server certificate data");
1845 preverify_ok = 0;
1846 } else {
1847 u8 hash[32];
1848 const u8 *addr[1];
1849 size_t len[1];
1850 addr[0] = wpabuf_head(cert);
1851 len[0] = wpabuf_len(cert);
1852 if (sha256_vector(1, addr, len, hash) < 0 ||
1853 os_memcmp(conn->srv_cert_hash, hash, 32) != 0) {
1854 err_str = "Server certificate mismatch";
1855 err = X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN;
1856 preverify_ok = 0;
1857 } else if (!preverify_ok) {
1858 /*
1859 * Certificate matches pinned certificate, allow
1860 * regardless of other problems.
1861 */
1862 wpa_printf(MSG_DEBUG,
1863 "OpenSSL: Ignore validation issues for a pinned server certificate");
1864 preverify_ok = 1;
1865 }
1866 wpabuf_free(cert);
1867 }
1868 }
1869 #endif /* CONFIG_SHA256 */
1870
1871 if (!preverify_ok) {
1872 wpa_printf(MSG_WARNING, "TLS: Certificate verification failed,"
1873 " error %d (%s) depth %d for '%s'", err, err_str,
1874 depth, buf);
1875 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1876 err_str, TLS_FAIL_UNSPECIFIED);
1877 return preverify_ok;
1878 }
1879
1880 wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - preverify_ok=%d "
1881 "err=%d (%s) ca_cert_verify=%d depth=%d buf='%s'",
1882 preverify_ok, err, err_str,
1883 conn->ca_cert_verify, depth, buf);
1884 if (depth == 0 && match && os_strstr(buf, match) == NULL) {
1885 wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not "
1886 "match with '%s'", buf, match);
1887 preverify_ok = 0;
1888 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1889 "Subject mismatch",
1890 TLS_FAIL_SUBJECT_MISMATCH);
1891 } else if (depth == 0 && altmatch &&
1892 !tls_match_altsubject(err_cert, altmatch)) {
1893 wpa_printf(MSG_WARNING, "TLS: altSubjectName match "
1894 "'%s' not found", altmatch);
1895 preverify_ok = 0;
1896 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1897 "AltSubject mismatch",
1898 TLS_FAIL_ALTSUBJECT_MISMATCH);
1899 } else if (depth == 0 && suffix_match &&
1900 !tls_match_suffix(err_cert, suffix_match, 0)) {
1901 wpa_printf(MSG_WARNING, "TLS: Domain suffix match '%s' not found",
1902 suffix_match);
1903 preverify_ok = 0;
1904 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1905 "Domain suffix mismatch",
1906 TLS_FAIL_DOMAIN_SUFFIX_MISMATCH);
1907 } else if (depth == 0 && domain_match &&
1908 !tls_match_suffix(err_cert, domain_match, 1)) {
1909 wpa_printf(MSG_WARNING, "TLS: Domain match '%s' not found",
1910 domain_match);
1911 preverify_ok = 0;
1912 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1913 "Domain mismatch",
1914 TLS_FAIL_DOMAIN_MISMATCH);
1915 } else
1916 openssl_tls_cert_event(conn, err_cert, depth, buf);
1917
1918 if (conn->cert_probe && preverify_ok && depth == 0) {
1919 wpa_printf(MSG_DEBUG, "OpenSSL: Reject server certificate "
1920 "on probe-only run");
1921 preverify_ok = 0;
1922 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1923 "Server certificate chain probe",
1924 TLS_FAIL_SERVER_CHAIN_PROBE);
1925 }
1926
1927 #ifdef OPENSSL_IS_BORINGSSL
1928 if (depth == 0 && (conn->flags & TLS_CONN_REQUEST_OCSP) &&
1929 preverify_ok) {
1930 enum ocsp_result res;
1931
1932 res = check_ocsp_resp(conn->ssl_ctx, conn->ssl, err_cert,
1933 conn->peer_issuer,
1934 conn->peer_issuer_issuer);
1935 if (res == OCSP_REVOKED) {
1936 preverify_ok = 0;
1937 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1938 "certificate revoked",
1939 TLS_FAIL_REVOKED);
1940 if (err == X509_V_OK)
1941 X509_STORE_CTX_set_error(
1942 x509_ctx, X509_V_ERR_CERT_REVOKED);
1943 } else if (res != OCSP_GOOD &&
1944 (conn->flags & TLS_CONN_REQUIRE_OCSP)) {
1945 preverify_ok = 0;
1946 openssl_tls_fail_event(conn, err_cert, err, depth, buf,
1947 "bad certificate status response",
1948 TLS_FAIL_UNSPECIFIED);
1949 }
1950 }
1951 #endif /* OPENSSL_IS_BORINGSSL */
1952
1953 if (depth == 0 && preverify_ok && context->event_cb != NULL)
1954 context->event_cb(context->cb_ctx,
1955 TLS_CERT_CHAIN_SUCCESS, NULL);
1956
1957 return preverify_ok;
1958 }
1959
1960
1961 #ifndef OPENSSL_NO_STDIO
tls_load_ca_der(struct tls_data * data,const char * ca_cert)1962 static int tls_load_ca_der(struct tls_data *data, const char *ca_cert)
1963 {
1964 SSL_CTX *ssl_ctx = data->ssl;
1965 X509_LOOKUP *lookup;
1966 int ret = 0;
1967
1968 lookup = X509_STORE_add_lookup(SSL_CTX_get_cert_store(ssl_ctx),
1969 X509_LOOKUP_file());
1970 if (lookup == NULL) {
1971 tls_show_errors(MSG_WARNING, __func__,
1972 "Failed add lookup for X509 store");
1973 return -1;
1974 }
1975
1976 if (!X509_LOOKUP_load_file(lookup, ca_cert, X509_FILETYPE_ASN1)) {
1977 unsigned long err = ERR_peek_error();
1978 tls_show_errors(MSG_WARNING, __func__,
1979 "Failed load CA in DER format");
1980 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1981 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1982 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1983 "cert already in hash table error",
1984 __func__);
1985 } else
1986 ret = -1;
1987 }
1988
1989 return ret;
1990 }
1991 #endif /* OPENSSL_NO_STDIO */
1992
1993
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)1994 static int tls_connection_ca_cert(struct tls_data *data,
1995 struct tls_connection *conn,
1996 const char *ca_cert, const u8 *ca_cert_blob,
1997 size_t ca_cert_blob_len, const char *ca_path)
1998 {
1999 SSL_CTX *ssl_ctx = data->ssl;
2000 X509_STORE *store;
2001
2002 /*
2003 * Remove previously configured trusted CA certificates before adding
2004 * new ones.
2005 */
2006 store = X509_STORE_new();
2007 if (store == NULL) {
2008 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
2009 "certificate store", __func__);
2010 return -1;
2011 }
2012 SSL_CTX_set_cert_store(ssl_ctx, store);
2013
2014 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
2015 conn->ca_cert_verify = 1;
2016
2017 if (ca_cert && os_strncmp(ca_cert, "probe://", 8) == 0) {
2018 wpa_printf(MSG_DEBUG, "OpenSSL: Probe for server certificate "
2019 "chain");
2020 conn->cert_probe = 1;
2021 conn->ca_cert_verify = 0;
2022 return 0;
2023 }
2024
2025 if (ca_cert && os_strncmp(ca_cert, "hash://", 7) == 0) {
2026 #ifdef CONFIG_SHA256
2027 const char *pos = ca_cert + 7;
2028 if (os_strncmp(pos, "server/sha256/", 14) != 0) {
2029 wpa_printf(MSG_DEBUG, "OpenSSL: Unsupported ca_cert "
2030 "hash value '%s'", ca_cert);
2031 return -1;
2032 }
2033 pos += 14;
2034 if (os_strlen(pos) != 32 * 2) {
2035 wpa_printf(MSG_DEBUG, "OpenSSL: Unexpected SHA256 "
2036 "hash length in ca_cert '%s'", ca_cert);
2037 return -1;
2038 }
2039 if (hexstr2bin(pos, conn->srv_cert_hash, 32) < 0) {
2040 wpa_printf(MSG_DEBUG, "OpenSSL: Invalid SHA256 hash "
2041 "value in ca_cert '%s'", ca_cert);
2042 return -1;
2043 }
2044 conn->server_cert_only = 1;
2045 wpa_printf(MSG_DEBUG, "OpenSSL: Checking only server "
2046 "certificate match");
2047 return 0;
2048 #else /* CONFIG_SHA256 */
2049 wpa_printf(MSG_INFO, "No SHA256 included in the build - "
2050 "cannot validate server certificate hash");
2051 return -1;
2052 #endif /* CONFIG_SHA256 */
2053 }
2054
2055 if (ca_cert_blob) {
2056 X509 *cert = d2i_X509(NULL,
2057 (const unsigned char **) &ca_cert_blob,
2058 ca_cert_blob_len);
2059 if (cert == NULL) {
2060 tls_show_errors(MSG_WARNING, __func__,
2061 "Failed to parse ca_cert_blob");
2062 return -1;
2063 }
2064
2065 if (!X509_STORE_add_cert(SSL_CTX_get_cert_store(ssl_ctx),
2066 cert)) {
2067 unsigned long err = ERR_peek_error();
2068 tls_show_errors(MSG_WARNING, __func__,
2069 "Failed to add ca_cert_blob to "
2070 "certificate store");
2071 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
2072 ERR_GET_REASON(err) ==
2073 X509_R_CERT_ALREADY_IN_HASH_TABLE) {
2074 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
2075 "cert already in hash table error",
2076 __func__);
2077 } else {
2078 X509_free(cert);
2079 return -1;
2080 }
2081 }
2082 X509_free(cert);
2083 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob "
2084 "to certificate store", __func__);
2085 return 0;
2086 }
2087
2088 #ifdef ANDROID
2089 /* Single alias */
2090 if (ca_cert && os_strncmp("keystore://", ca_cert, 11) == 0) {
2091 if (tls_add_ca_from_keystore(SSL_CTX_get_cert_store(ssl_ctx),
2092 &ca_cert[11]) < 0)
2093 return -1;
2094 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
2095 return 0;
2096 }
2097
2098 /* Multiple aliases separated by space */
2099 if (ca_cert && os_strncmp("keystores://", ca_cert, 12) == 0) {
2100 char *aliases = os_strdup(&ca_cert[12]);
2101 const char *delim = " ";
2102 int rc = 0;
2103 char *savedptr;
2104 char *alias;
2105
2106 if (!aliases)
2107 return -1;
2108 alias = strtok_r(aliases, delim, &savedptr);
2109 for (; alias; alias = strtok_r(NULL, delim, &savedptr)) {
2110 if (tls_add_ca_from_keystore_encoded(
2111 SSL_CTX_get_cert_store(ssl_ctx), alias)) {
2112 wpa_printf(MSG_WARNING,
2113 "OpenSSL: %s - Failed to add ca_cert %s from keystore",
2114 __func__, alias);
2115 rc = -1;
2116 break;
2117 }
2118 }
2119 os_free(aliases);
2120 if (rc)
2121 return rc;
2122
2123 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
2124 return 0;
2125 }
2126 #endif /* ANDROID */
2127
2128 #ifdef CONFIG_NATIVE_WINDOWS
2129 if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) ==
2130 0) {
2131 wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from "
2132 "system certificate store");
2133 return 0;
2134 }
2135 #endif /* CONFIG_NATIVE_WINDOWS */
2136
2137 if (ca_cert || ca_path) {
2138 #ifndef OPENSSL_NO_STDIO
2139 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) !=
2140 1) {
2141 tls_show_errors(MSG_WARNING, __func__,
2142 "Failed to load root certificates");
2143 if (ca_cert &&
2144 tls_load_ca_der(data, ca_cert) == 0) {
2145 wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded "
2146 "DER format CA certificate",
2147 __func__);
2148 } else
2149 return -1;
2150 } else {
2151 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
2152 "certificate(s) loaded");
2153 tls_get_errors(data);
2154 }
2155 #else /* OPENSSL_NO_STDIO */
2156 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
2157 __func__);
2158 return -1;
2159 #endif /* OPENSSL_NO_STDIO */
2160 } else {
2161 /* No ca_cert configured - do not try to verify server
2162 * certificate */
2163 conn->ca_cert_verify = 0;
2164 }
2165
2166 return 0;
2167 }
2168
2169
tls_global_ca_cert(struct tls_data * data,const char * ca_cert)2170 static int tls_global_ca_cert(struct tls_data *data, const char *ca_cert)
2171 {
2172 SSL_CTX *ssl_ctx = data->ssl;
2173
2174 if (ca_cert) {
2175 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1)
2176 {
2177 tls_show_errors(MSG_WARNING, __func__,
2178 "Failed to load root certificates");
2179 return -1;
2180 }
2181
2182 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
2183 "certificate(s) loaded");
2184
2185 #ifndef OPENSSL_NO_STDIO
2186 /* Add the same CAs to the client certificate requests */
2187 SSL_CTX_set_client_CA_list(ssl_ctx,
2188 SSL_load_client_CA_file(ca_cert));
2189 #endif /* OPENSSL_NO_STDIO */
2190 }
2191
2192 return 0;
2193 }
2194
2195
tls_global_set_verify(void * ssl_ctx,int check_crl)2196 int tls_global_set_verify(void *ssl_ctx, int check_crl)
2197 {
2198 int flags;
2199
2200 if (check_crl) {
2201 struct tls_data *data = ssl_ctx;
2202 X509_STORE *cs = SSL_CTX_get_cert_store(data->ssl);
2203 if (cs == NULL) {
2204 tls_show_errors(MSG_INFO, __func__, "Failed to get "
2205 "certificate store when enabling "
2206 "check_crl");
2207 return -1;
2208 }
2209 flags = X509_V_FLAG_CRL_CHECK;
2210 if (check_crl == 2)
2211 flags |= X509_V_FLAG_CRL_CHECK_ALL;
2212 X509_STORE_set_flags(cs, flags);
2213 }
2214 return 0;
2215 }
2216
2217
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)2218 static int tls_connection_set_subject_match(struct tls_connection *conn,
2219 const char *subject_match,
2220 const char *altsubject_match,
2221 const char *suffix_match,
2222 const char *domain_match)
2223 {
2224 os_free(conn->subject_match);
2225 conn->subject_match = NULL;
2226 if (subject_match) {
2227 conn->subject_match = os_strdup(subject_match);
2228 if (conn->subject_match == NULL)
2229 return -1;
2230 }
2231
2232 os_free(conn->altsubject_match);
2233 conn->altsubject_match = NULL;
2234 if (altsubject_match) {
2235 conn->altsubject_match = os_strdup(altsubject_match);
2236 if (conn->altsubject_match == NULL)
2237 return -1;
2238 }
2239
2240 os_free(conn->suffix_match);
2241 conn->suffix_match = NULL;
2242 if (suffix_match) {
2243 conn->suffix_match = os_strdup(suffix_match);
2244 if (conn->suffix_match == NULL)
2245 return -1;
2246 }
2247
2248 os_free(conn->domain_match);
2249 conn->domain_match = NULL;
2250 if (domain_match) {
2251 conn->domain_match = os_strdup(domain_match);
2252 if (conn->domain_match == NULL)
2253 return -1;
2254 }
2255
2256 return 0;
2257 }
2258
2259
tls_set_conn_flags(SSL * ssl,unsigned int flags)2260 static void tls_set_conn_flags(SSL *ssl, unsigned int flags)
2261 {
2262 #ifdef SSL_OP_NO_TICKET
2263 if (flags & TLS_CONN_DISABLE_SESSION_TICKET)
2264 SSL_set_options(ssl, SSL_OP_NO_TICKET);
2265 else
2266 SSL_clear_options(ssl, SSL_OP_NO_TICKET);
2267 #endif /* SSL_OP_NO_TICKET */
2268
2269 #ifdef SSL_OP_NO_TLSv1
2270 if (flags & TLS_CONN_DISABLE_TLSv1_0)
2271 SSL_set_options(ssl, SSL_OP_NO_TLSv1);
2272 else
2273 SSL_clear_options(ssl, SSL_OP_NO_TLSv1);
2274 #endif /* SSL_OP_NO_TLSv1 */
2275 #ifdef SSL_OP_NO_TLSv1_1
2276 if (flags & TLS_CONN_DISABLE_TLSv1_1)
2277 SSL_set_options(ssl, SSL_OP_NO_TLSv1_1);
2278 else
2279 SSL_clear_options(ssl, SSL_OP_NO_TLSv1_1);
2280 #endif /* SSL_OP_NO_TLSv1_1 */
2281 #ifdef SSL_OP_NO_TLSv1_2
2282 if (flags & TLS_CONN_DISABLE_TLSv1_2)
2283 SSL_set_options(ssl, SSL_OP_NO_TLSv1_2);
2284 else
2285 SSL_clear_options(ssl, SSL_OP_NO_TLSv1_2);
2286 #endif /* SSL_OP_NO_TLSv1_2 */
2287 }
2288
2289
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)2290 int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn,
2291 int verify_peer, unsigned int flags,
2292 const u8 *session_ctx, size_t session_ctx_len)
2293 {
2294 static int counter = 0;
2295 struct tls_data *data = ssl_ctx;
2296
2297 if (conn == NULL)
2298 return -1;
2299
2300 if (verify_peer) {
2301 conn->ca_cert_verify = 1;
2302 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER |
2303 SSL_VERIFY_FAIL_IF_NO_PEER_CERT |
2304 SSL_VERIFY_CLIENT_ONCE, tls_verify_cb);
2305 } else {
2306 conn->ca_cert_verify = 0;
2307 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
2308 }
2309
2310 tls_set_conn_flags(conn->ssl, flags);
2311 conn->flags = flags;
2312
2313 SSL_set_accept_state(conn->ssl);
2314
2315 if (data->tls_session_lifetime == 0) {
2316 /*
2317 * Set session id context to a unique value to make sure
2318 * session resumption cannot be used either through session
2319 * caching or TLS ticket extension.
2320 */
2321 counter++;
2322 SSL_set_session_id_context(conn->ssl,
2323 (const unsigned char *) &counter,
2324 sizeof(counter));
2325 } else if (session_ctx) {
2326 SSL_set_session_id_context(conn->ssl, session_ctx,
2327 session_ctx_len);
2328 }
2329
2330 return 0;
2331 }
2332
2333
tls_connection_client_cert(struct tls_connection * conn,const char * client_cert,const u8 * client_cert_blob,size_t client_cert_blob_len)2334 static int tls_connection_client_cert(struct tls_connection *conn,
2335 const char *client_cert,
2336 const u8 *client_cert_blob,
2337 size_t client_cert_blob_len)
2338 {
2339 if (client_cert == NULL && client_cert_blob == NULL)
2340 return 0;
2341
2342 #ifdef PKCS12_FUNCS
2343 #if OPENSSL_VERSION_NUMBER < 0x10002000L || defined(LIBRESSL_VERSION_NUMBER)
2344 /*
2345 * Clear previously set extra chain certificates, if any, from PKCS#12
2346 * processing in tls_parse_pkcs12() to allow OpenSSL to build a new
2347 * chain properly.
2348 */
2349 SSL_CTX_clear_extra_chain_certs(conn->ssl_ctx);
2350 #endif /* OPENSSL_VERSION_NUMBER < 0x10002000L */
2351 #endif /* PKCS12_FUNCS */
2352
2353 if (client_cert_blob &&
2354 SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob,
2355 client_cert_blob_len) == 1) {
2356 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> "
2357 "OK");
2358 return 0;
2359 } else if (client_cert_blob) {
2360 tls_show_errors(MSG_DEBUG, __func__,
2361 "SSL_use_certificate_ASN1 failed");
2362 }
2363
2364 if (client_cert == NULL)
2365 return -1;
2366
2367 #ifdef ANDROID
2368 if (os_strncmp("keystore://", client_cert, 11) == 0) {
2369 BIO *bio = BIO_from_keystore(&client_cert[11]);
2370 X509 *x509 = NULL;
2371 int ret = -1;
2372 if (bio)
2373 x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL);
2374
2375 if (x509) {
2376 if (SSL_use_certificate(conn->ssl, x509) == 1)
2377 ret = 0;
2378 X509_free(x509);
2379 }
2380
2381 /* Read additional certificates into the chain. */
2382 while (bio) {
2383 x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL);
2384 if (x509) {
2385 /* Takes ownership of x509 */
2386 SSL_add0_chain_cert(conn->ssl, x509);
2387 } else {
2388 BIO_free(bio);
2389 bio = NULL;
2390 }
2391 }
2392 return ret;
2393 }
2394 #endif /* ANDROID */
2395
2396 #ifndef OPENSSL_NO_STDIO
2397 if (SSL_use_certificate_file(conn->ssl, client_cert,
2398 SSL_FILETYPE_ASN1) == 1) {
2399 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)"
2400 " --> OK");
2401 return 0;
2402 }
2403
2404 if (SSL_use_certificate_file(conn->ssl, client_cert,
2405 SSL_FILETYPE_PEM) == 1) {
2406 ERR_clear_error();
2407 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)"
2408 " --> OK");
2409 return 0;
2410 }
2411
2412 tls_show_errors(MSG_DEBUG, __func__,
2413 "SSL_use_certificate_file failed");
2414 #else /* OPENSSL_NO_STDIO */
2415 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
2416 #endif /* OPENSSL_NO_STDIO */
2417
2418 return -1;
2419 }
2420
2421
tls_global_client_cert(struct tls_data * data,const char * client_cert)2422 static int tls_global_client_cert(struct tls_data *data,
2423 const char *client_cert)
2424 {
2425 #ifndef OPENSSL_NO_STDIO
2426 SSL_CTX *ssl_ctx = data->ssl;
2427
2428 if (client_cert == NULL)
2429 return 0;
2430
2431 if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
2432 SSL_FILETYPE_ASN1) != 1 &&
2433 SSL_CTX_use_certificate_chain_file(ssl_ctx, client_cert) != 1 &&
2434 SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
2435 SSL_FILETYPE_PEM) != 1) {
2436 tls_show_errors(MSG_INFO, __func__,
2437 "Failed to load client certificate");
2438 return -1;
2439 }
2440 return 0;
2441 #else /* OPENSSL_NO_STDIO */
2442 if (client_cert == NULL)
2443 return 0;
2444 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
2445 return -1;
2446 #endif /* OPENSSL_NO_STDIO */
2447 }
2448
2449
tls_passwd_cb(char * buf,int size,int rwflag,void * password)2450 static int tls_passwd_cb(char *buf, int size, int rwflag, void *password)
2451 {
2452 if (password == NULL) {
2453 return 0;
2454 }
2455 os_strlcpy(buf, (char *) password, size);
2456 return os_strlen(buf);
2457 }
2458
2459
2460 #ifdef PKCS12_FUNCS
tls_parse_pkcs12(struct tls_data * data,SSL * ssl,PKCS12 * p12,const char * passwd)2461 static int tls_parse_pkcs12(struct tls_data *data, SSL *ssl, PKCS12 *p12,
2462 const char *passwd)
2463 {
2464 EVP_PKEY *pkey;
2465 X509 *cert;
2466 STACK_OF(X509) *certs;
2467 int res = 0;
2468 char buf[256];
2469
2470 pkey = NULL;
2471 cert = NULL;
2472 certs = NULL;
2473 if (!passwd)
2474 passwd = "";
2475 if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) {
2476 tls_show_errors(MSG_DEBUG, __func__,
2477 "Failed to parse PKCS12 file");
2478 PKCS12_free(p12);
2479 return -1;
2480 }
2481 wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data");
2482
2483 if (cert) {
2484 X509_NAME_oneline(X509_get_subject_name(cert), buf,
2485 sizeof(buf));
2486 wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: "
2487 "subject='%s'", buf);
2488 if (ssl) {
2489 if (SSL_use_certificate(ssl, cert) != 1)
2490 res = -1;
2491 } else {
2492 if (SSL_CTX_use_certificate(data->ssl, cert) != 1)
2493 res = -1;
2494 }
2495 X509_free(cert);
2496 }
2497
2498 if (pkey) {
2499 wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12");
2500 if (ssl) {
2501 if (SSL_use_PrivateKey(ssl, pkey) != 1)
2502 res = -1;
2503 } else {
2504 if (SSL_CTX_use_PrivateKey(data->ssl, pkey) != 1)
2505 res = -1;
2506 }
2507 EVP_PKEY_free(pkey);
2508 }
2509
2510 if (certs) {
2511 #if OPENSSL_VERSION_NUMBER >= 0x10002000L && !defined(LIBRESSL_VERSION_NUMBER)
2512 if (ssl)
2513 SSL_clear_chain_certs(ssl);
2514 else
2515 SSL_CTX_clear_chain_certs(data->ssl);
2516 while ((cert = sk_X509_pop(certs)) != NULL) {
2517 X509_NAME_oneline(X509_get_subject_name(cert), buf,
2518 sizeof(buf));
2519 wpa_printf(MSG_DEBUG, "TLS: additional certificate"
2520 " from PKCS12: subject='%s'", buf);
2521 if ((ssl && SSL_add1_chain_cert(ssl, cert) != 1) ||
2522 (!ssl && SSL_CTX_add1_chain_cert(data->ssl,
2523 cert) != 1)) {
2524 tls_show_errors(MSG_DEBUG, __func__,
2525 "Failed to add additional certificate");
2526 res = -1;
2527 X509_free(cert);
2528 break;
2529 }
2530 X509_free(cert);
2531 }
2532 if (!res) {
2533 /* Try to continue anyway */
2534 }
2535 sk_X509_pop_free(certs, X509_free);
2536 #ifndef OPENSSL_IS_BORINGSSL
2537 if (ssl)
2538 res = SSL_build_cert_chain(
2539 ssl,
2540 SSL_BUILD_CHAIN_FLAG_CHECK |
2541 SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR);
2542 else
2543 res = SSL_CTX_build_cert_chain(
2544 data->ssl,
2545 SSL_BUILD_CHAIN_FLAG_CHECK |
2546 SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR);
2547 if (!res) {
2548 tls_show_errors(MSG_DEBUG, __func__,
2549 "Failed to build certificate chain");
2550 } else if (res == 2) {
2551 wpa_printf(MSG_DEBUG,
2552 "TLS: Ignore certificate chain verification error when building chain with PKCS#12 extra certificates");
2553 }
2554 #endif /* OPENSSL_IS_BORINGSSL */
2555 /*
2556 * Try to continue regardless of result since it is possible for
2557 * the extra certificates not to be required.
2558 */
2559 res = 0;
2560 #else /* OPENSSL_VERSION_NUMBER >= 0x10002000L */
2561 SSL_CTX_clear_extra_chain_certs(data->ssl);
2562 while ((cert = sk_X509_pop(certs)) != NULL) {
2563 X509_NAME_oneline(X509_get_subject_name(cert), buf,
2564 sizeof(buf));
2565 wpa_printf(MSG_DEBUG, "TLS: additional certificate"
2566 " from PKCS12: subject='%s'", buf);
2567 /*
2568 * There is no SSL equivalent for the chain cert - so
2569 * always add it to the context...
2570 */
2571 if (SSL_CTX_add_extra_chain_cert(data->ssl, cert) != 1)
2572 {
2573 X509_free(cert);
2574 res = -1;
2575 break;
2576 }
2577 }
2578 sk_X509_pop_free(certs, X509_free);
2579 #endif /* OPENSSL_VERSION_NUMBER >= 0x10002000L */
2580 }
2581
2582 PKCS12_free(p12);
2583
2584 if (res < 0)
2585 tls_get_errors(data);
2586
2587 return res;
2588 }
2589 #endif /* PKCS12_FUNCS */
2590
2591
tls_read_pkcs12(struct tls_data * data,SSL * ssl,const char * private_key,const char * passwd)2592 static int tls_read_pkcs12(struct tls_data *data, SSL *ssl,
2593 const char *private_key, const char *passwd)
2594 {
2595 #ifdef PKCS12_FUNCS
2596 FILE *f;
2597 PKCS12 *p12;
2598
2599 f = fopen(private_key, "rb");
2600 if (f == NULL)
2601 return -1;
2602
2603 p12 = d2i_PKCS12_fp(f, NULL);
2604 fclose(f);
2605
2606 if (p12 == NULL) {
2607 tls_show_errors(MSG_INFO, __func__,
2608 "Failed to use PKCS#12 file");
2609 return -1;
2610 }
2611
2612 return tls_parse_pkcs12(data, ssl, p12, passwd);
2613
2614 #else /* PKCS12_FUNCS */
2615 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read "
2616 "p12/pfx files");
2617 return -1;
2618 #endif /* PKCS12_FUNCS */
2619 }
2620
2621
tls_read_pkcs12_blob(struct tls_data * data,SSL * ssl,const u8 * blob,size_t len,const char * passwd)2622 static int tls_read_pkcs12_blob(struct tls_data *data, SSL *ssl,
2623 const u8 *blob, size_t len, const char *passwd)
2624 {
2625 #ifdef PKCS12_FUNCS
2626 PKCS12 *p12;
2627
2628 p12 = d2i_PKCS12(NULL, (const unsigned char **) &blob, len);
2629 if (p12 == NULL) {
2630 tls_show_errors(MSG_INFO, __func__,
2631 "Failed to use PKCS#12 blob");
2632 return -1;
2633 }
2634
2635 return tls_parse_pkcs12(data, ssl, p12, passwd);
2636
2637 #else /* PKCS12_FUNCS */
2638 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse "
2639 "p12/pfx blobs");
2640 return -1;
2641 #endif /* PKCS12_FUNCS */
2642 }
2643
2644
2645 #ifndef OPENSSL_NO_ENGINE
tls_engine_get_cert(struct tls_connection * conn,const char * cert_id,X509 ** cert)2646 static int tls_engine_get_cert(struct tls_connection *conn,
2647 const char *cert_id,
2648 X509 **cert)
2649 {
2650 /* this runs after the private key is loaded so no PIN is required */
2651 struct {
2652 const char *cert_id;
2653 X509 *cert;
2654 } params;
2655 params.cert_id = cert_id;
2656 params.cert = NULL;
2657
2658 if (!ENGINE_ctrl_cmd(conn->engine, "LOAD_CERT_CTRL",
2659 0, ¶ms, NULL, 1)) {
2660 unsigned long err = ERR_get_error();
2661
2662 wpa_printf(MSG_ERROR, "ENGINE: cannot load client cert with id"
2663 " '%s' [%s]", cert_id,
2664 ERR_error_string(err, NULL));
2665 if (tls_is_pin_error(err))
2666 return TLS_SET_PARAMS_ENGINE_PRV_BAD_PIN;
2667 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
2668 }
2669 if (!params.cert) {
2670 wpa_printf(MSG_ERROR, "ENGINE: did not properly cert with id"
2671 " '%s'", cert_id);
2672 return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
2673 }
2674 *cert = params.cert;
2675 return 0;
2676 }
2677 #endif /* OPENSSL_NO_ENGINE */
2678
2679
tls_connection_engine_client_cert(struct tls_connection * conn,const char * cert_id)2680 static int tls_connection_engine_client_cert(struct tls_connection *conn,
2681 const char *cert_id)
2682 {
2683 #ifndef OPENSSL_NO_ENGINE
2684 X509 *cert;
2685
2686 if (tls_engine_get_cert(conn, cert_id, &cert))
2687 return -1;
2688
2689 if (!SSL_use_certificate(conn->ssl, cert)) {
2690 tls_show_errors(MSG_ERROR, __func__,
2691 "SSL_use_certificate failed");
2692 X509_free(cert);
2693 return -1;
2694 }
2695 X509_free(cert);
2696 wpa_printf(MSG_DEBUG, "ENGINE: SSL_use_certificate --> "
2697 "OK");
2698 return 0;
2699
2700 #else /* OPENSSL_NO_ENGINE */
2701 return -1;
2702 #endif /* OPENSSL_NO_ENGINE */
2703 }
2704
2705
tls_connection_engine_ca_cert(struct tls_data * data,struct tls_connection * conn,const char * ca_cert_id)2706 static int tls_connection_engine_ca_cert(struct tls_data *data,
2707 struct tls_connection *conn,
2708 const char *ca_cert_id)
2709 {
2710 #ifndef OPENSSL_NO_ENGINE
2711 X509 *cert;
2712 SSL_CTX *ssl_ctx = data->ssl;
2713 X509_STORE *store;
2714
2715 if (tls_engine_get_cert(conn, ca_cert_id, &cert))
2716 return -1;
2717
2718 /* start off the same as tls_connection_ca_cert */
2719 store = X509_STORE_new();
2720 if (store == NULL) {
2721 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
2722 "certificate store", __func__);
2723 X509_free(cert);
2724 return -1;
2725 }
2726 SSL_CTX_set_cert_store(ssl_ctx, store);
2727 if (!X509_STORE_add_cert(store, cert)) {
2728 unsigned long err = ERR_peek_error();
2729 tls_show_errors(MSG_WARNING, __func__,
2730 "Failed to add CA certificate from engine "
2731 "to certificate store");
2732 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
2733 ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
2734 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring cert"
2735 " already in hash table error",
2736 __func__);
2737 } else {
2738 X509_free(cert);
2739 return -1;
2740 }
2741 }
2742 X509_free(cert);
2743 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added CA certificate from engine "
2744 "to certificate store", __func__);
2745 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
2746 conn->ca_cert_verify = 1;
2747
2748 return 0;
2749
2750 #else /* OPENSSL_NO_ENGINE */
2751 return -1;
2752 #endif /* OPENSSL_NO_ENGINE */
2753 }
2754
2755
tls_connection_engine_private_key(struct tls_connection * conn)2756 static int tls_connection_engine_private_key(struct tls_connection *conn)
2757 {
2758 #if defined(ANDROID) || !defined(OPENSSL_NO_ENGINE)
2759 if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) {
2760 tls_show_errors(MSG_ERROR, __func__,
2761 "ENGINE: cannot use private key for TLS");
2762 return -1;
2763 }
2764 if (!SSL_check_private_key(conn->ssl)) {
2765 tls_show_errors(MSG_INFO, __func__,
2766 "Private key failed verification");
2767 return -1;
2768 }
2769 return 0;
2770 #else /* OPENSSL_NO_ENGINE */
2771 wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but "
2772 "engine support was not compiled in");
2773 return -1;
2774 #endif /* OPENSSL_NO_ENGINE */
2775 }
2776
2777
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)2778 static int tls_connection_private_key(struct tls_data *data,
2779 struct tls_connection *conn,
2780 const char *private_key,
2781 const char *private_key_passwd,
2782 const u8 *private_key_blob,
2783 size_t private_key_blob_len)
2784 {
2785 SSL_CTX *ssl_ctx = data->ssl;
2786 char *passwd;
2787 int ok;
2788
2789 if (private_key == NULL && private_key_blob == NULL)
2790 return 0;
2791
2792 if (private_key_passwd) {
2793 passwd = os_strdup(private_key_passwd);
2794 if (passwd == NULL)
2795 return -1;
2796 } else
2797 passwd = NULL;
2798
2799 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
2800 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
2801
2802 ok = 0;
2803 while (private_key_blob) {
2804 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl,
2805 (u8 *) private_key_blob,
2806 private_key_blob_len) == 1) {
2807 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
2808 "ASN1(EVP_PKEY_RSA) --> OK");
2809 ok = 1;
2810 break;
2811 }
2812
2813 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl,
2814 (u8 *) private_key_blob,
2815 private_key_blob_len) == 1) {
2816 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
2817 "ASN1(EVP_PKEY_DSA) --> OK");
2818 ok = 1;
2819 break;
2820 }
2821
2822 if (SSL_use_RSAPrivateKey_ASN1(conn->ssl,
2823 (u8 *) private_key_blob,
2824 private_key_blob_len) == 1) {
2825 wpa_printf(MSG_DEBUG, "OpenSSL: "
2826 "SSL_use_RSAPrivateKey_ASN1 --> OK");
2827 ok = 1;
2828 break;
2829 }
2830
2831 if (tls_read_pkcs12_blob(data, conn->ssl, private_key_blob,
2832 private_key_blob_len, passwd) == 0) {
2833 wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> "
2834 "OK");
2835 ok = 1;
2836 break;
2837 }
2838
2839 break;
2840 }
2841
2842 while (!ok && private_key) {
2843 #ifndef OPENSSL_NO_STDIO
2844 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
2845 SSL_FILETYPE_ASN1) == 1) {
2846 wpa_printf(MSG_DEBUG, "OpenSSL: "
2847 "SSL_use_PrivateKey_File (DER) --> OK");
2848 ok = 1;
2849 break;
2850 }
2851
2852 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
2853 SSL_FILETYPE_PEM) == 1) {
2854 wpa_printf(MSG_DEBUG, "OpenSSL: "
2855 "SSL_use_PrivateKey_File (PEM) --> OK");
2856 ok = 1;
2857 break;
2858 }
2859 #else /* OPENSSL_NO_STDIO */
2860 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
2861 __func__);
2862 #endif /* OPENSSL_NO_STDIO */
2863
2864 if (tls_read_pkcs12(data, conn->ssl, private_key, passwd)
2865 == 0) {
2866 wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file "
2867 "--> OK");
2868 ok = 1;
2869 break;
2870 }
2871
2872 if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) {
2873 wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to "
2874 "access certificate store --> OK");
2875 ok = 1;
2876 break;
2877 }
2878
2879 break;
2880 }
2881
2882 if (!ok) {
2883 tls_show_errors(MSG_INFO, __func__,
2884 "Failed to load private key");
2885 os_free(passwd);
2886 return -1;
2887 }
2888 ERR_clear_error();
2889 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
2890 os_free(passwd);
2891
2892 if (!SSL_check_private_key(conn->ssl)) {
2893 tls_show_errors(MSG_INFO, __func__, "Private key failed "
2894 "verification");
2895 return -1;
2896 }
2897
2898 wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully");
2899 return 0;
2900 }
2901
2902
tls_global_private_key(struct tls_data * data,const char * private_key,const char * private_key_passwd)2903 static int tls_global_private_key(struct tls_data *data,
2904 const char *private_key,
2905 const char *private_key_passwd)
2906 {
2907 SSL_CTX *ssl_ctx = data->ssl;
2908 char *passwd;
2909
2910 if (private_key == NULL)
2911 return 0;
2912
2913 if (private_key_passwd) {
2914 passwd = os_strdup(private_key_passwd);
2915 if (passwd == NULL)
2916 return -1;
2917 } else
2918 passwd = NULL;
2919
2920 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
2921 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
2922 if (
2923 #ifndef OPENSSL_NO_STDIO
2924 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
2925 SSL_FILETYPE_ASN1) != 1 &&
2926 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
2927 SSL_FILETYPE_PEM) != 1 &&
2928 #endif /* OPENSSL_NO_STDIO */
2929 tls_read_pkcs12(data, NULL, private_key, passwd)) {
2930 tls_show_errors(MSG_INFO, __func__,
2931 "Failed to load private key");
2932 os_free(passwd);
2933 ERR_clear_error();
2934 return -1;
2935 }
2936 os_free(passwd);
2937 ERR_clear_error();
2938 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
2939
2940 if (!SSL_CTX_check_private_key(ssl_ctx)) {
2941 tls_show_errors(MSG_INFO, __func__,
2942 "Private key failed verification");
2943 return -1;
2944 }
2945
2946 return 0;
2947 }
2948
2949
tls_connection_dh(struct tls_connection * conn,const char * dh_file)2950 static int tls_connection_dh(struct tls_connection *conn, const char *dh_file)
2951 {
2952 #ifdef OPENSSL_NO_DH
2953 if (dh_file == NULL)
2954 return 0;
2955 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
2956 "dh_file specified");
2957 return -1;
2958 #else /* OPENSSL_NO_DH */
2959 DH *dh;
2960 BIO *bio;
2961
2962 /* TODO: add support for dh_blob */
2963 if (dh_file == NULL)
2964 return 0;
2965 if (conn == NULL)
2966 return -1;
2967
2968 bio = BIO_new_file(dh_file, "r");
2969 if (bio == NULL) {
2970 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
2971 dh_file, ERR_error_string(ERR_get_error(), NULL));
2972 return -1;
2973 }
2974 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
2975 BIO_free(bio);
2976 #ifndef OPENSSL_NO_DSA
2977 while (dh == NULL) {
2978 DSA *dsa;
2979 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
2980 " trying to parse as DSA params", dh_file,
2981 ERR_error_string(ERR_get_error(), NULL));
2982 bio = BIO_new_file(dh_file, "r");
2983 if (bio == NULL)
2984 break;
2985 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
2986 BIO_free(bio);
2987 if (!dsa) {
2988 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
2989 "'%s': %s", dh_file,
2990 ERR_error_string(ERR_get_error(), NULL));
2991 break;
2992 }
2993
2994 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
2995 dh = DSA_dup_DH(dsa);
2996 DSA_free(dsa);
2997 if (dh == NULL) {
2998 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
2999 "params into DH params");
3000 break;
3001 }
3002 break;
3003 }
3004 #endif /* !OPENSSL_NO_DSA */
3005 if (dh == NULL) {
3006 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
3007 "'%s'", dh_file);
3008 return -1;
3009 }
3010
3011 if (SSL_set_tmp_dh(conn->ssl, dh) != 1) {
3012 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
3013 "%s", dh_file,
3014 ERR_error_string(ERR_get_error(), NULL));
3015 DH_free(dh);
3016 return -1;
3017 }
3018 DH_free(dh);
3019 return 0;
3020 #endif /* OPENSSL_NO_DH */
3021 }
3022
3023
tls_global_dh(struct tls_data * data,const char * dh_file)3024 static int tls_global_dh(struct tls_data *data, const char *dh_file)
3025 {
3026 #ifdef OPENSSL_NO_DH
3027 if (dh_file == NULL)
3028 return 0;
3029 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
3030 "dh_file specified");
3031 return -1;
3032 #else /* OPENSSL_NO_DH */
3033 SSL_CTX *ssl_ctx = data->ssl;
3034 DH *dh;
3035 BIO *bio;
3036
3037 /* TODO: add support for dh_blob */
3038 if (dh_file == NULL)
3039 return 0;
3040 if (ssl_ctx == NULL)
3041 return -1;
3042
3043 bio = BIO_new_file(dh_file, "r");
3044 if (bio == NULL) {
3045 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
3046 dh_file, ERR_error_string(ERR_get_error(), NULL));
3047 return -1;
3048 }
3049 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
3050 BIO_free(bio);
3051 #ifndef OPENSSL_NO_DSA
3052 while (dh == NULL) {
3053 DSA *dsa;
3054 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
3055 " trying to parse as DSA params", dh_file,
3056 ERR_error_string(ERR_get_error(), NULL));
3057 bio = BIO_new_file(dh_file, "r");
3058 if (bio == NULL)
3059 break;
3060 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
3061 BIO_free(bio);
3062 if (!dsa) {
3063 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
3064 "'%s': %s", dh_file,
3065 ERR_error_string(ERR_get_error(), NULL));
3066 break;
3067 }
3068
3069 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
3070 dh = DSA_dup_DH(dsa);
3071 DSA_free(dsa);
3072 if (dh == NULL) {
3073 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
3074 "params into DH params");
3075 break;
3076 }
3077 break;
3078 }
3079 #endif /* !OPENSSL_NO_DSA */
3080 if (dh == NULL) {
3081 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
3082 "'%s'", dh_file);
3083 return -1;
3084 }
3085
3086 if (SSL_CTX_set_tmp_dh(ssl_ctx, dh) != 1) {
3087 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
3088 "%s", dh_file,
3089 ERR_error_string(ERR_get_error(), NULL));
3090 DH_free(dh);
3091 return -1;
3092 }
3093 DH_free(dh);
3094 return 0;
3095 #endif /* OPENSSL_NO_DH */
3096 }
3097
3098
tls_connection_get_random(void * ssl_ctx,struct tls_connection * conn,struct tls_random * keys)3099 int tls_connection_get_random(void *ssl_ctx, struct tls_connection *conn,
3100 struct tls_random *keys)
3101 {
3102 SSL *ssl;
3103
3104 if (conn == NULL || keys == NULL)
3105 return -1;
3106 ssl = conn->ssl;
3107 if (ssl == NULL)
3108 return -1;
3109
3110 os_memset(keys, 0, sizeof(*keys));
3111 keys->client_random = conn->client_random;
3112 keys->client_random_len = SSL_get_client_random(
3113 ssl, conn->client_random, sizeof(conn->client_random));
3114 keys->server_random = conn->server_random;
3115 keys->server_random_len = SSL_get_server_random(
3116 ssl, conn->server_random, sizeof(conn->server_random));
3117
3118 return 0;
3119 }
3120
3121
3122 #ifdef OPENSSL_NEED_EAP_FAST_PRF
openssl_get_keyblock_size(SSL * ssl)3123 static int openssl_get_keyblock_size(SSL *ssl)
3124 {
3125 #if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
3126 const EVP_CIPHER *c;
3127 const EVP_MD *h;
3128 int md_size;
3129
3130 if (ssl->enc_read_ctx == NULL || ssl->enc_read_ctx->cipher == NULL ||
3131 ssl->read_hash == NULL)
3132 return -1;
3133
3134 c = ssl->enc_read_ctx->cipher;
3135 h = EVP_MD_CTX_md(ssl->read_hash);
3136 if (h)
3137 md_size = EVP_MD_size(h);
3138 else if (ssl->s3)
3139 md_size = ssl->s3->tmp.new_mac_secret_size;
3140 else
3141 return -1;
3142
3143 wpa_printf(MSG_DEBUG, "OpenSSL: keyblock size: key_len=%d MD_size=%d "
3144 "IV_len=%d", EVP_CIPHER_key_length(c), md_size,
3145 EVP_CIPHER_iv_length(c));
3146 return 2 * (EVP_CIPHER_key_length(c) +
3147 md_size +
3148 EVP_CIPHER_iv_length(c));
3149 #else
3150 const SSL_CIPHER *ssl_cipher;
3151 int cipher, digest;
3152 const EVP_CIPHER *c;
3153 const EVP_MD *h;
3154
3155 ssl_cipher = SSL_get_current_cipher(ssl);
3156 if (!ssl_cipher)
3157 return -1;
3158 cipher = SSL_CIPHER_get_cipher_nid(ssl_cipher);
3159 digest = SSL_CIPHER_get_digest_nid(ssl_cipher);
3160 wpa_printf(MSG_DEBUG, "OpenSSL: cipher nid %d digest nid %d",
3161 cipher, digest);
3162 if (cipher < 0 || digest < 0)
3163 return -1;
3164 c = EVP_get_cipherbynid(cipher);
3165 h = EVP_get_digestbynid(digest);
3166 if (!c || !h)
3167 return -1;
3168
3169 wpa_printf(MSG_DEBUG,
3170 "OpenSSL: keyblock size: key_len=%d MD_size=%d IV_len=%d",
3171 EVP_CIPHER_key_length(c), EVP_MD_size(h),
3172 EVP_CIPHER_iv_length(c));
3173 return 2 * (EVP_CIPHER_key_length(c) + EVP_MD_size(h) +
3174 EVP_CIPHER_iv_length(c));
3175 #endif
3176 }
3177 #endif /* OPENSSL_NEED_EAP_FAST_PRF */
3178
3179
tls_connection_export_key(void * tls_ctx,struct tls_connection * conn,const char * label,u8 * out,size_t out_len)3180 int tls_connection_export_key(void *tls_ctx, struct tls_connection *conn,
3181 const char *label, u8 *out, size_t out_len)
3182 {
3183 if (!conn ||
3184 SSL_export_keying_material(conn->ssl, out, out_len, label,
3185 os_strlen(label), NULL, 0, 0) != 1)
3186 return -1;
3187 return 0;
3188 }
3189
3190
tls_connection_get_eap_fast_key(void * tls_ctx,struct tls_connection * conn,u8 * out,size_t out_len)3191 int tls_connection_get_eap_fast_key(void *tls_ctx, struct tls_connection *conn,
3192 u8 *out, size_t out_len)
3193 {
3194 #ifdef OPENSSL_NEED_EAP_FAST_PRF
3195 SSL *ssl;
3196 SSL_SESSION *sess;
3197 u8 *rnd;
3198 int ret = -1;
3199 int skip = 0;
3200 u8 *tmp_out = NULL;
3201 u8 *_out = out;
3202 unsigned char client_random[SSL3_RANDOM_SIZE];
3203 unsigned char server_random[SSL3_RANDOM_SIZE];
3204 unsigned char master_key[64];
3205 size_t master_key_len;
3206 const char *ver;
3207
3208 /*
3209 * TLS library did not support EAP-FAST key generation, so get the
3210 * needed TLS session parameters and use an internal implementation of
3211 * TLS PRF to derive the key.
3212 */
3213
3214 if (conn == NULL)
3215 return -1;
3216 ssl = conn->ssl;
3217 if (ssl == NULL)
3218 return -1;
3219 ver = SSL_get_version(ssl);
3220 sess = SSL_get_session(ssl);
3221 if (!ver || !sess)
3222 return -1;
3223
3224 skip = openssl_get_keyblock_size(ssl);
3225 if (skip < 0)
3226 return -1;
3227 tmp_out = os_malloc(skip + out_len);
3228 if (!tmp_out)
3229 return -1;
3230 _out = tmp_out;
3231
3232 rnd = os_malloc(2 * SSL3_RANDOM_SIZE);
3233 if (!rnd) {
3234 os_free(tmp_out);
3235 return -1;
3236 }
3237
3238 SSL_get_client_random(ssl, client_random, sizeof(client_random));
3239 SSL_get_server_random(ssl, server_random, sizeof(server_random));
3240 master_key_len = SSL_SESSION_get_master_key(sess, master_key,
3241 sizeof(master_key));
3242
3243 os_memcpy(rnd, server_random, SSL3_RANDOM_SIZE);
3244 os_memcpy(rnd + SSL3_RANDOM_SIZE, client_random, SSL3_RANDOM_SIZE);
3245
3246 if (os_strcmp(ver, "TLSv1.2") == 0) {
3247 tls_prf_sha256(master_key, master_key_len,
3248 "key expansion", rnd, 2 * SSL3_RANDOM_SIZE,
3249 _out, skip + out_len);
3250 ret = 0;
3251 } else if (tls_prf_sha1_md5(master_key, master_key_len,
3252 "key expansion", rnd, 2 * SSL3_RANDOM_SIZE,
3253 _out, skip + out_len) == 0) {
3254 ret = 0;
3255 }
3256 os_memset(master_key, 0, sizeof(master_key));
3257 os_free(rnd);
3258 if (ret == 0)
3259 os_memcpy(out, _out + skip, out_len);
3260 bin_clear_free(tmp_out, skip);
3261
3262 return ret;
3263 #else /* OPENSSL_NEED_EAP_FAST_PRF */
3264 wpa_printf(MSG_ERROR,
3265 "OpenSSL: EAP-FAST keys cannot be exported in FIPS mode");
3266 return -1;
3267 #endif /* OPENSSL_NEED_EAP_FAST_PRF */
3268 }
3269
3270
3271 static struct wpabuf *
openssl_handshake(struct tls_connection * conn,const struct wpabuf * in_data,int server)3272 openssl_handshake(struct tls_connection *conn, const struct wpabuf *in_data,
3273 int server)
3274 {
3275 int res;
3276 struct wpabuf *out_data;
3277
3278 /*
3279 * Give TLS handshake data from the server (if available) to OpenSSL
3280 * for processing.
3281 */
3282 if (in_data && wpabuf_len(in_data) > 0 &&
3283 BIO_write(conn->ssl_in, wpabuf_head(in_data), wpabuf_len(in_data))
3284 < 0) {
3285 tls_show_errors(MSG_INFO, __func__,
3286 "Handshake failed - BIO_write");
3287 return NULL;
3288 }
3289
3290 /* Initiate TLS handshake or continue the existing handshake */
3291 if (server)
3292 res = SSL_accept(conn->ssl);
3293 else
3294 res = SSL_connect(conn->ssl);
3295 if (res != 1) {
3296 int err = SSL_get_error(conn->ssl, res);
3297 if (err == SSL_ERROR_WANT_READ)
3298 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want "
3299 "more data");
3300 else if (err == SSL_ERROR_WANT_WRITE)
3301 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to "
3302 "write");
3303 else {
3304 tls_show_errors(MSG_INFO, __func__, "SSL_connect");
3305 conn->failed++;
3306 }
3307 }
3308
3309 /* Get the TLS handshake data to be sent to the server */
3310 res = BIO_ctrl_pending(conn->ssl_out);
3311 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
3312 out_data = wpabuf_alloc(res);
3313 if (out_data == NULL) {
3314 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
3315 "handshake output (%d bytes)", res);
3316 if (BIO_reset(conn->ssl_out) < 0) {
3317 tls_show_errors(MSG_INFO, __func__,
3318 "BIO_reset failed");
3319 }
3320 return NULL;
3321 }
3322 res = res == 0 ? 0 : BIO_read(conn->ssl_out, wpabuf_mhead(out_data),
3323 res);
3324 if (res < 0) {
3325 tls_show_errors(MSG_INFO, __func__,
3326 "Handshake failed - BIO_read");
3327 if (BIO_reset(conn->ssl_out) < 0) {
3328 tls_show_errors(MSG_INFO, __func__,
3329 "BIO_reset failed");
3330 }
3331 wpabuf_free(out_data);
3332 return NULL;
3333 }
3334 wpabuf_put(out_data, res);
3335
3336 return out_data;
3337 }
3338
3339
3340 static struct wpabuf *
openssl_get_appl_data(struct tls_connection * conn,size_t max_len)3341 openssl_get_appl_data(struct tls_connection *conn, size_t max_len)
3342 {
3343 struct wpabuf *appl_data;
3344 int res;
3345
3346 appl_data = wpabuf_alloc(max_len + 100);
3347 if (appl_data == NULL)
3348 return NULL;
3349
3350 res = SSL_read(conn->ssl, wpabuf_mhead(appl_data),
3351 wpabuf_size(appl_data));
3352 if (res < 0) {
3353 int err = SSL_get_error(conn->ssl, res);
3354 if (err == SSL_ERROR_WANT_READ ||
3355 err == SSL_ERROR_WANT_WRITE) {
3356 wpa_printf(MSG_DEBUG, "SSL: No Application Data "
3357 "included");
3358 } else {
3359 tls_show_errors(MSG_INFO, __func__,
3360 "Failed to read possible "
3361 "Application Data");
3362 }
3363 wpabuf_free(appl_data);
3364 return NULL;
3365 }
3366
3367 wpabuf_put(appl_data, res);
3368 wpa_hexdump_buf_key(MSG_MSGDUMP, "SSL: Application Data in Finished "
3369 "message", appl_data);
3370
3371 return appl_data;
3372 }
3373
3374
3375 static struct wpabuf *
openssl_connection_handshake(struct tls_connection * conn,const struct wpabuf * in_data,struct wpabuf ** appl_data,int server)3376 openssl_connection_handshake(struct tls_connection *conn,
3377 const struct wpabuf *in_data,
3378 struct wpabuf **appl_data, int server)
3379 {
3380 struct wpabuf *out_data;
3381
3382 if (appl_data)
3383 *appl_data = NULL;
3384
3385 out_data = openssl_handshake(conn, in_data, server);
3386 if (out_data == NULL)
3387 return NULL;
3388 if (conn->invalid_hb_used) {
3389 wpa_printf(MSG_INFO, "TLS: Heartbeat attack detected - do not send response");
3390 wpabuf_free(out_data);
3391 return NULL;
3392 }
3393
3394 if (SSL_is_init_finished(conn->ssl)) {
3395 wpa_printf(MSG_DEBUG,
3396 "OpenSSL: Handshake finished - resumed=%d",
3397 tls_connection_resumed(conn->ssl_ctx, conn));
3398 if (appl_data && in_data)
3399 *appl_data = openssl_get_appl_data(conn,
3400 wpabuf_len(in_data));
3401 }
3402
3403 if (conn->invalid_hb_used) {
3404 wpa_printf(MSG_INFO, "TLS: Heartbeat attack detected - do not send response");
3405 if (appl_data) {
3406 wpabuf_free(*appl_data);
3407 *appl_data = NULL;
3408 }
3409 wpabuf_free(out_data);
3410 return NULL;
3411 }
3412
3413 return out_data;
3414 }
3415
3416
3417 struct wpabuf *
tls_connection_handshake(void * ssl_ctx,struct tls_connection * conn,const struct wpabuf * in_data,struct wpabuf ** appl_data)3418 tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn,
3419 const struct wpabuf *in_data,
3420 struct wpabuf **appl_data)
3421 {
3422 return openssl_connection_handshake(conn, in_data, appl_data, 0);
3423 }
3424
3425
tls_connection_server_handshake(void * tls_ctx,struct tls_connection * conn,const struct wpabuf * in_data,struct wpabuf ** appl_data)3426 struct wpabuf * tls_connection_server_handshake(void *tls_ctx,
3427 struct tls_connection *conn,
3428 const struct wpabuf *in_data,
3429 struct wpabuf **appl_data)
3430 {
3431 return openssl_connection_handshake(conn, in_data, appl_data, 1);
3432 }
3433
3434
tls_connection_encrypt(void * tls_ctx,struct tls_connection * conn,const struct wpabuf * in_data)3435 struct wpabuf * tls_connection_encrypt(void *tls_ctx,
3436 struct tls_connection *conn,
3437 const struct wpabuf *in_data)
3438 {
3439 int res;
3440 struct wpabuf *buf;
3441
3442 if (conn == NULL)
3443 return NULL;
3444
3445 /* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */
3446 if ((res = BIO_reset(conn->ssl_in)) < 0 ||
3447 (res = BIO_reset(conn->ssl_out)) < 0) {
3448 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
3449 return NULL;
3450 }
3451 res = SSL_write(conn->ssl, wpabuf_head(in_data), wpabuf_len(in_data));
3452 if (res < 0) {
3453 tls_show_errors(MSG_INFO, __func__,
3454 "Encryption failed - SSL_write");
3455 return NULL;
3456 }
3457
3458 /* Read encrypted data to be sent to the server */
3459 buf = wpabuf_alloc(wpabuf_len(in_data) + 300);
3460 if (buf == NULL)
3461 return NULL;
3462 res = BIO_read(conn->ssl_out, wpabuf_mhead(buf), wpabuf_size(buf));
3463 if (res < 0) {
3464 tls_show_errors(MSG_INFO, __func__,
3465 "Encryption failed - BIO_read");
3466 wpabuf_free(buf);
3467 return NULL;
3468 }
3469 wpabuf_put(buf, res);
3470
3471 return buf;
3472 }
3473
3474
tls_connection_decrypt(void * tls_ctx,struct tls_connection * conn,const struct wpabuf * in_data)3475 struct wpabuf * tls_connection_decrypt(void *tls_ctx,
3476 struct tls_connection *conn,
3477 const struct wpabuf *in_data)
3478 {
3479 int res;
3480 struct wpabuf *buf;
3481
3482 /* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */
3483 res = BIO_write(conn->ssl_in, wpabuf_head(in_data),
3484 wpabuf_len(in_data));
3485 if (res < 0) {
3486 tls_show_errors(MSG_INFO, __func__,
3487 "Decryption failed - BIO_write");
3488 return NULL;
3489 }
3490 if (BIO_reset(conn->ssl_out) < 0) {
3491 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
3492 return NULL;
3493 }
3494
3495 /* Read decrypted data for further processing */
3496 /*
3497 * Even though we try to disable TLS compression, it is possible that
3498 * this cannot be done with all TLS libraries. Add extra buffer space
3499 * to handle the possibility of the decrypted data being longer than
3500 * input data.
3501 */
3502 buf = wpabuf_alloc((wpabuf_len(in_data) + 500) * 3);
3503 if (buf == NULL)
3504 return NULL;
3505 res = SSL_read(conn->ssl, wpabuf_mhead(buf), wpabuf_size(buf));
3506 if (res < 0) {
3507 tls_show_errors(MSG_INFO, __func__,
3508 "Decryption failed - SSL_read");
3509 wpabuf_free(buf);
3510 return NULL;
3511 }
3512 wpabuf_put(buf, res);
3513
3514 if (conn->invalid_hb_used) {
3515 wpa_printf(MSG_INFO, "TLS: Heartbeat attack detected - do not send response");
3516 wpabuf_free(buf);
3517 return NULL;
3518 }
3519
3520 return buf;
3521 }
3522
3523
tls_connection_resumed(void * ssl_ctx,struct tls_connection * conn)3524 int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn)
3525 {
3526 return conn ? SSL_cache_hit(conn->ssl) : 0;
3527 }
3528
3529
tls_connection_set_cipher_list(void * tls_ctx,struct tls_connection * conn,u8 * ciphers)3530 int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
3531 u8 *ciphers)
3532 {
3533 char buf[500], *pos, *end;
3534 u8 *c;
3535 int ret;
3536
3537 if (conn == NULL || conn->ssl == NULL || ciphers == NULL)
3538 return -1;
3539
3540 buf[0] = '\0';
3541 pos = buf;
3542 end = pos + sizeof(buf);
3543
3544 c = ciphers;
3545 while (*c != TLS_CIPHER_NONE) {
3546 const char *suite;
3547
3548 switch (*c) {
3549 case TLS_CIPHER_RC4_SHA:
3550 suite = "RC4-SHA";
3551 break;
3552 case TLS_CIPHER_AES128_SHA:
3553 suite = "AES128-SHA";
3554 break;
3555 case TLS_CIPHER_RSA_DHE_AES128_SHA:
3556 suite = "DHE-RSA-AES128-SHA";
3557 break;
3558 case TLS_CIPHER_ANON_DH_AES128_SHA:
3559 suite = "ADH-AES128-SHA";
3560 break;
3561 case TLS_CIPHER_RSA_DHE_AES256_SHA:
3562 suite = "DHE-RSA-AES256-SHA";
3563 break;
3564 case TLS_CIPHER_AES256_SHA:
3565 suite = "AES256-SHA";
3566 break;
3567 default:
3568 wpa_printf(MSG_DEBUG, "TLS: Unsupported "
3569 "cipher selection: %d", *c);
3570 return -1;
3571 }
3572 ret = os_snprintf(pos, end - pos, ":%s", suite);
3573 if (os_snprintf_error(end - pos, ret))
3574 break;
3575 pos += ret;
3576
3577 c++;
3578 }
3579
3580 wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1);
3581
3582 #if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
3583 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
3584 if (os_strstr(buf, ":ADH-")) {
3585 /*
3586 * Need to drop to security level 0 to allow anonymous
3587 * cipher suites for EAP-FAST.
3588 */
3589 SSL_set_security_level(conn->ssl, 0);
3590 } else if (SSL_get_security_level(conn->ssl) == 0) {
3591 /* Force at least security level 1 */
3592 SSL_set_security_level(conn->ssl, 1);
3593 }
3594 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
3595 #endif
3596
3597 if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) {
3598 tls_show_errors(MSG_INFO, __func__,
3599 "Cipher suite configuration failed");
3600 return -1;
3601 }
3602
3603 return 0;
3604 }
3605
3606
tls_get_version(void * ssl_ctx,struct tls_connection * conn,char * buf,size_t buflen)3607 int tls_get_version(void *ssl_ctx, struct tls_connection *conn,
3608 char *buf, size_t buflen)
3609 {
3610 const char *name;
3611 if (conn == NULL || conn->ssl == NULL)
3612 return -1;
3613
3614 name = SSL_get_version(conn->ssl);
3615 if (name == NULL)
3616 return -1;
3617
3618 os_strlcpy(buf, name, buflen);
3619 return 0;
3620 }
3621
3622
tls_get_cipher(void * ssl_ctx,struct tls_connection * conn,char * buf,size_t buflen)3623 int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn,
3624 char *buf, size_t buflen)
3625 {
3626 const char *name;
3627 if (conn == NULL || conn->ssl == NULL)
3628 return -1;
3629
3630 name = SSL_get_cipher(conn->ssl);
3631 if (name == NULL)
3632 return -1;
3633
3634 os_strlcpy(buf, name, buflen);
3635 return 0;
3636 }
3637
3638
tls_connection_enable_workaround(void * ssl_ctx,struct tls_connection * conn)3639 int tls_connection_enable_workaround(void *ssl_ctx,
3640 struct tls_connection *conn)
3641 {
3642 SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
3643
3644 return 0;
3645 }
3646
3647
3648 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
3649 /* ClientHello TLS extensions require a patch to openssl, so this function is
3650 * commented out unless explicitly needed for EAP-FAST in order to be able to
3651 * 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)3652 int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn,
3653 int ext_type, const u8 *data,
3654 size_t data_len)
3655 {
3656 if (conn == NULL || conn->ssl == NULL || ext_type != 35)
3657 return -1;
3658
3659 if (SSL_set_session_ticket_ext(conn->ssl, (void *) data,
3660 data_len) != 1)
3661 return -1;
3662
3663 return 0;
3664 }
3665 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
3666
3667
tls_connection_get_failed(void * ssl_ctx,struct tls_connection * conn)3668 int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn)
3669 {
3670 if (conn == NULL)
3671 return -1;
3672 return conn->failed;
3673 }
3674
3675
tls_connection_get_read_alerts(void * ssl_ctx,struct tls_connection * conn)3676 int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn)
3677 {
3678 if (conn == NULL)
3679 return -1;
3680 return conn->read_alerts;
3681 }
3682
3683
tls_connection_get_write_alerts(void * ssl_ctx,struct tls_connection * conn)3684 int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn)
3685 {
3686 if (conn == NULL)
3687 return -1;
3688 return conn->write_alerts;
3689 }
3690
3691
3692 #ifdef HAVE_OCSP
3693
ocsp_debug_print_resp(OCSP_RESPONSE * rsp)3694 static void ocsp_debug_print_resp(OCSP_RESPONSE *rsp)
3695 {
3696 #ifndef CONFIG_NO_STDOUT_DEBUG
3697 BIO *out;
3698 size_t rlen;
3699 char *txt;
3700 int res;
3701
3702 if (wpa_debug_level > MSG_DEBUG)
3703 return;
3704
3705 out = BIO_new(BIO_s_mem());
3706 if (!out)
3707 return;
3708
3709 OCSP_RESPONSE_print(out, rsp, 0);
3710 rlen = BIO_ctrl_pending(out);
3711 txt = os_malloc(rlen + 1);
3712 if (!txt) {
3713 BIO_free(out);
3714 return;
3715 }
3716
3717 res = BIO_read(out, txt, rlen);
3718 if (res > 0) {
3719 txt[res] = '\0';
3720 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP Response\n%s", txt);
3721 }
3722 os_free(txt);
3723 BIO_free(out);
3724 #endif /* CONFIG_NO_STDOUT_DEBUG */
3725 }
3726
3727
debug_print_cert(X509 * cert,const char * title)3728 static void debug_print_cert(X509 *cert, const char *title)
3729 {
3730 #ifndef CONFIG_NO_STDOUT_DEBUG
3731 BIO *out;
3732 size_t rlen;
3733 char *txt;
3734 int res;
3735
3736 if (wpa_debug_level > MSG_DEBUG)
3737 return;
3738
3739 out = BIO_new(BIO_s_mem());
3740 if (!out)
3741 return;
3742
3743 X509_print(out, cert);
3744 rlen = BIO_ctrl_pending(out);
3745 txt = os_malloc(rlen + 1);
3746 if (!txt) {
3747 BIO_free(out);
3748 return;
3749 }
3750
3751 res = BIO_read(out, txt, rlen);
3752 if (res > 0) {
3753 txt[res] = '\0';
3754 wpa_printf(MSG_DEBUG, "OpenSSL: %s\n%s", title, txt);
3755 }
3756 os_free(txt);
3757
3758 BIO_free(out);
3759 #endif /* CONFIG_NO_STDOUT_DEBUG */
3760 }
3761
3762
ocsp_resp_cb(SSL * s,void * arg)3763 static int ocsp_resp_cb(SSL *s, void *arg)
3764 {
3765 struct tls_connection *conn = arg;
3766 const unsigned char *p;
3767 int len, status, reason;
3768 OCSP_RESPONSE *rsp;
3769 OCSP_BASICRESP *basic;
3770 OCSP_CERTID *id;
3771 ASN1_GENERALIZEDTIME *produced_at, *this_update, *next_update;
3772 X509_STORE *store;
3773 STACK_OF(X509) *certs = NULL;
3774
3775 len = SSL_get_tlsext_status_ocsp_resp(s, &p);
3776 if (!p) {
3777 wpa_printf(MSG_DEBUG, "OpenSSL: No OCSP response received");
3778 return (conn->flags & TLS_CONN_REQUIRE_OCSP) ? 0 : 1;
3779 }
3780
3781 wpa_hexdump(MSG_DEBUG, "OpenSSL: OCSP response", p, len);
3782
3783 rsp = d2i_OCSP_RESPONSE(NULL, &p, len);
3784 if (!rsp) {
3785 wpa_printf(MSG_INFO, "OpenSSL: Failed to parse OCSP response");
3786 return 0;
3787 }
3788
3789 ocsp_debug_print_resp(rsp);
3790
3791 status = OCSP_response_status(rsp);
3792 if (status != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
3793 wpa_printf(MSG_INFO, "OpenSSL: OCSP responder error %d (%s)",
3794 status, OCSP_response_status_str(status));
3795 return 0;
3796 }
3797
3798 basic = OCSP_response_get1_basic(rsp);
3799 if (!basic) {
3800 wpa_printf(MSG_INFO, "OpenSSL: Could not find BasicOCSPResponse");
3801 return 0;
3802 }
3803
3804 store = SSL_CTX_get_cert_store(conn->ssl_ctx);
3805 if (conn->peer_issuer) {
3806 debug_print_cert(conn->peer_issuer, "Add OCSP issuer");
3807
3808 if (X509_STORE_add_cert(store, conn->peer_issuer) != 1) {
3809 tls_show_errors(MSG_INFO, __func__,
3810 "OpenSSL: Could not add issuer to certificate store");
3811 }
3812 certs = sk_X509_new_null();
3813 if (certs) {
3814 X509 *cert;
3815 cert = X509_dup(conn->peer_issuer);
3816 if (cert && !sk_X509_push(certs, cert)) {
3817 tls_show_errors(
3818 MSG_INFO, __func__,
3819 "OpenSSL: Could not add issuer to OCSP responder trust store");
3820 X509_free(cert);
3821 sk_X509_free(certs);
3822 certs = NULL;
3823 }
3824 if (certs && conn->peer_issuer_issuer) {
3825 cert = X509_dup(conn->peer_issuer_issuer);
3826 if (cert && !sk_X509_push(certs, cert)) {
3827 tls_show_errors(
3828 MSG_INFO, __func__,
3829 "OpenSSL: Could not add issuer's issuer to OCSP responder trust store");
3830 X509_free(cert);
3831 }
3832 }
3833 }
3834 }
3835
3836 status = OCSP_basic_verify(basic, certs, store, OCSP_TRUSTOTHER);
3837 sk_X509_pop_free(certs, X509_free);
3838 if (status <= 0) {
3839 tls_show_errors(MSG_INFO, __func__,
3840 "OpenSSL: OCSP response failed verification");
3841 OCSP_BASICRESP_free(basic);
3842 OCSP_RESPONSE_free(rsp);
3843 return 0;
3844 }
3845
3846 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP response verification succeeded");
3847
3848 if (!conn->peer_cert) {
3849 wpa_printf(MSG_DEBUG, "OpenSSL: Peer certificate not available for OCSP status check");
3850 OCSP_BASICRESP_free(basic);
3851 OCSP_RESPONSE_free(rsp);
3852 return 0;
3853 }
3854
3855 if (!conn->peer_issuer) {
3856 wpa_printf(MSG_DEBUG, "OpenSSL: Peer issuer certificate not available for OCSP status check");
3857 OCSP_BASICRESP_free(basic);
3858 OCSP_RESPONSE_free(rsp);
3859 return 0;
3860 }
3861
3862 id = OCSP_cert_to_id(NULL, conn->peer_cert, conn->peer_issuer);
3863 if (!id) {
3864 wpa_printf(MSG_DEBUG, "OpenSSL: Could not create OCSP certificate identifier");
3865 OCSP_BASICRESP_free(basic);
3866 OCSP_RESPONSE_free(rsp);
3867 return 0;
3868 }
3869
3870 if (!OCSP_resp_find_status(basic, id, &status, &reason, &produced_at,
3871 &this_update, &next_update)) {
3872 wpa_printf(MSG_INFO, "OpenSSL: Could not find current server certificate from OCSP response%s",
3873 (conn->flags & TLS_CONN_REQUIRE_OCSP) ? "" :
3874 " (OCSP not required)");
3875 OCSP_CERTID_free(id);
3876 OCSP_BASICRESP_free(basic);
3877 OCSP_RESPONSE_free(rsp);
3878 return (conn->flags & TLS_CONN_REQUIRE_OCSP) ? 0 : 1;
3879 }
3880 OCSP_CERTID_free(id);
3881
3882 if (!OCSP_check_validity(this_update, next_update, 5 * 60, -1)) {
3883 tls_show_errors(MSG_INFO, __func__,
3884 "OpenSSL: OCSP status times invalid");
3885 OCSP_BASICRESP_free(basic);
3886 OCSP_RESPONSE_free(rsp);
3887 return 0;
3888 }
3889
3890 OCSP_BASICRESP_free(basic);
3891 OCSP_RESPONSE_free(rsp);
3892
3893 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status for server certificate: %s",
3894 OCSP_cert_status_str(status));
3895
3896 if (status == V_OCSP_CERTSTATUS_GOOD)
3897 return 1;
3898 if (status == V_OCSP_CERTSTATUS_REVOKED)
3899 return 0;
3900 if (conn->flags & TLS_CONN_REQUIRE_OCSP) {
3901 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status unknown, but OCSP required");
3902 return 0;
3903 }
3904 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status unknown, but OCSP was not required, so allow connection to continue");
3905 return 1;
3906 }
3907
3908
ocsp_status_cb(SSL * s,void * arg)3909 static int ocsp_status_cb(SSL *s, void *arg)
3910 {
3911 char *tmp;
3912 char *resp;
3913 size_t len;
3914
3915 if (tls_global->ocsp_stapling_response == NULL) {
3916 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - no response configured");
3917 return SSL_TLSEXT_ERR_OK;
3918 }
3919
3920 resp = os_readfile(tls_global->ocsp_stapling_response, &len);
3921 if (resp == NULL) {
3922 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - could not read response file");
3923 /* TODO: Build OCSPResponse with responseStatus = internalError
3924 */
3925 return SSL_TLSEXT_ERR_OK;
3926 }
3927 wpa_printf(MSG_DEBUG, "OpenSSL: OCSP status callback - send cached response");
3928 tmp = OPENSSL_malloc(len);
3929 if (tmp == NULL) {
3930 os_free(resp);
3931 return SSL_TLSEXT_ERR_ALERT_FATAL;
3932 }
3933
3934 os_memcpy(tmp, resp, len);
3935 os_free(resp);
3936 SSL_set_tlsext_status_ocsp_resp(s, tmp, len);
3937
3938 return SSL_TLSEXT_ERR_OK;
3939 }
3940
3941 #endif /* HAVE_OCSP */
3942
3943
tls_connection_set_params(void * tls_ctx,struct tls_connection * conn,const struct tls_connection_params * params)3944 int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
3945 const struct tls_connection_params *params)
3946 {
3947 struct tls_data *data = tls_ctx;
3948 int ret;
3949 unsigned long err;
3950 int can_pkcs11 = 0;
3951 const char *key_id = params->key_id;
3952 const char *cert_id = params->cert_id;
3953 const char *ca_cert_id = params->ca_cert_id;
3954 const char *engine_id = params->engine ? params->engine_id : NULL;
3955
3956 if (conn == NULL)
3957 return -1;
3958
3959 if (params->flags & TLS_CONN_REQUIRE_OCSP_ALL) {
3960 wpa_printf(MSG_INFO,
3961 "OpenSSL: ocsp=3 not supported");
3962 return -1;
3963 }
3964
3965 /*
3966 * If the engine isn't explicitly configured, and any of the
3967 * cert/key fields are actually PKCS#11 URIs, then automatically
3968 * use the PKCS#11 ENGINE.
3969 */
3970 if (!engine_id || os_strcmp(engine_id, "pkcs11") == 0)
3971 can_pkcs11 = 1;
3972
3973 if (!key_id && params->private_key && can_pkcs11 &&
3974 os_strncmp(params->private_key, "pkcs11:", 7) == 0) {
3975 can_pkcs11 = 2;
3976 key_id = params->private_key;
3977 }
3978
3979 if (!cert_id && params->client_cert && can_pkcs11 &&
3980 os_strncmp(params->client_cert, "pkcs11:", 7) == 0) {
3981 can_pkcs11 = 2;
3982 cert_id = params->client_cert;
3983 }
3984
3985 if (!ca_cert_id && params->ca_cert && can_pkcs11 &&
3986 os_strncmp(params->ca_cert, "pkcs11:", 7) == 0) {
3987 can_pkcs11 = 2;
3988 ca_cert_id = params->ca_cert;
3989 }
3990
3991 /* If we need to automatically enable the PKCS#11 ENGINE, do so. */
3992 if (can_pkcs11 == 2 && !engine_id)
3993 engine_id = "pkcs11";
3994
3995 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
3996 #if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
3997 if (params->flags & TLS_CONN_EAP_FAST) {
3998 wpa_printf(MSG_DEBUG,
3999 "OpenSSL: Use TLSv1_method() for EAP-FAST");
4000 if (SSL_set_ssl_method(conn->ssl, TLSv1_method()) != 1) {
4001 tls_show_errors(MSG_INFO, __func__,
4002 "Failed to set TLSv1_method() for EAP-FAST");
4003 return -1;
4004 }
4005 }
4006 #endif
4007 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
4008
4009 while ((err = ERR_get_error())) {
4010 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
4011 __func__, ERR_error_string(err, NULL));
4012 }
4013
4014 if (engine_id) {
4015 wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine");
4016 ret = tls_engine_init(conn, engine_id, params->pin,
4017 key_id, cert_id, ca_cert_id);
4018 if (ret)
4019 return ret;
4020 }
4021 if (tls_connection_set_subject_match(conn,
4022 params->subject_match,
4023 params->altsubject_match,
4024 params->suffix_match,
4025 params->domain_match))
4026 return -1;
4027
4028 if (engine_id && ca_cert_id) {
4029 if (tls_connection_engine_ca_cert(data, conn, ca_cert_id))
4030 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
4031 } else if (tls_connection_ca_cert(data, conn, params->ca_cert,
4032 params->ca_cert_blob,
4033 params->ca_cert_blob_len,
4034 params->ca_path))
4035 return -1;
4036
4037 if (engine_id && cert_id) {
4038 if (tls_connection_engine_client_cert(conn, cert_id))
4039 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
4040 } else if (tls_connection_client_cert(conn, params->client_cert,
4041 params->client_cert_blob,
4042 params->client_cert_blob_len))
4043 return -1;
4044
4045 if (engine_id && key_id) {
4046 wpa_printf(MSG_DEBUG, "TLS: Using private key from engine");
4047 if (tls_connection_engine_private_key(conn))
4048 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
4049 } else if (tls_connection_private_key(data, conn,
4050 params->private_key,
4051 params->private_key_passwd,
4052 params->private_key_blob,
4053 params->private_key_blob_len)) {
4054 wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'",
4055 params->private_key);
4056 return -1;
4057 }
4058
4059 if (tls_connection_dh(conn, params->dh_file)) {
4060 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
4061 params->dh_file);
4062 return -1;
4063 }
4064
4065 if (params->openssl_ciphers &&
4066 SSL_set_cipher_list(conn->ssl, params->openssl_ciphers) != 1) {
4067 wpa_printf(MSG_INFO,
4068 "OpenSSL: Failed to set cipher string '%s'",
4069 params->openssl_ciphers);
4070 return -1;
4071 }
4072
4073 tls_set_conn_flags(conn->ssl, params->flags);
4074
4075 #ifdef OPENSSL_IS_BORINGSSL
4076 if (params->flags & TLS_CONN_REQUEST_OCSP) {
4077 SSL_enable_ocsp_stapling(conn->ssl);
4078 }
4079 #else /* OPENSSL_IS_BORINGSSL */
4080 #ifdef HAVE_OCSP
4081 if (params->flags & TLS_CONN_REQUEST_OCSP) {
4082 SSL_CTX *ssl_ctx = data->ssl;
4083 SSL_set_tlsext_status_type(conn->ssl, TLSEXT_STATUSTYPE_ocsp);
4084 SSL_CTX_set_tlsext_status_cb(ssl_ctx, ocsp_resp_cb);
4085 SSL_CTX_set_tlsext_status_arg(ssl_ctx, conn);
4086 }
4087 #else /* HAVE_OCSP */
4088 if (params->flags & TLS_CONN_REQUIRE_OCSP) {
4089 wpa_printf(MSG_INFO,
4090 "OpenSSL: No OCSP support included - reject configuration");
4091 return -1;
4092 }
4093 if (params->flags & TLS_CONN_REQUEST_OCSP) {
4094 wpa_printf(MSG_DEBUG,
4095 "OpenSSL: No OCSP support included - allow optional OCSP case to continue");
4096 }
4097 #endif /* HAVE_OCSP */
4098 #endif /* OPENSSL_IS_BORINGSSL */
4099
4100 conn->flags = params->flags;
4101
4102 tls_get_errors(data);
4103
4104 return 0;
4105 }
4106
4107
tls_global_set_params(void * tls_ctx,const struct tls_connection_params * params)4108 int tls_global_set_params(void *tls_ctx,
4109 const struct tls_connection_params *params)
4110 {
4111 struct tls_data *data = tls_ctx;
4112 SSL_CTX *ssl_ctx = data->ssl;
4113 unsigned long err;
4114
4115 while ((err = ERR_get_error())) {
4116 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
4117 __func__, ERR_error_string(err, NULL));
4118 }
4119
4120 if (tls_global_ca_cert(data, params->ca_cert) ||
4121 tls_global_client_cert(data, params->client_cert) ||
4122 tls_global_private_key(data, params->private_key,
4123 params->private_key_passwd) ||
4124 tls_global_dh(data, params->dh_file)) {
4125 wpa_printf(MSG_INFO, "TLS: Failed to set global parameters");
4126 return -1;
4127 }
4128
4129 if (params->openssl_ciphers &&
4130 SSL_CTX_set_cipher_list(ssl_ctx, params->openssl_ciphers) != 1) {
4131 wpa_printf(MSG_INFO,
4132 "OpenSSL: Failed to set cipher string '%s'",
4133 params->openssl_ciphers);
4134 return -1;
4135 }
4136
4137 #ifdef SSL_OP_NO_TICKET
4138 if (params->flags & TLS_CONN_DISABLE_SESSION_TICKET)
4139 SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_TICKET);
4140 else
4141 SSL_CTX_clear_options(ssl_ctx, SSL_OP_NO_TICKET);
4142 #endif /* SSL_OP_NO_TICKET */
4143
4144 #ifdef HAVE_OCSP
4145 SSL_CTX_set_tlsext_status_cb(ssl_ctx, ocsp_status_cb);
4146 SSL_CTX_set_tlsext_status_arg(ssl_ctx, ssl_ctx);
4147 os_free(tls_global->ocsp_stapling_response);
4148 if (params->ocsp_stapling_response)
4149 tls_global->ocsp_stapling_response =
4150 os_strdup(params->ocsp_stapling_response);
4151 else
4152 tls_global->ocsp_stapling_response = NULL;
4153 #endif /* HAVE_OCSP */
4154
4155 return 0;
4156 }
4157
4158
4159 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
4160 /* Pre-shared secred requires a patch to openssl, so this function is
4161 * commented out unless explicitly needed for EAP-FAST in order to be able to
4162 * build this file with unmodified openssl. */
4163
4164 #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)4165 static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
4166 STACK_OF(SSL_CIPHER) *peer_ciphers,
4167 const SSL_CIPHER **cipher, void *arg)
4168 #else /* OPENSSL_IS_BORINGSSL */
4169 static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
4170 STACK_OF(SSL_CIPHER) *peer_ciphers,
4171 SSL_CIPHER **cipher, void *arg)
4172 #endif /* OPENSSL_IS_BORINGSSL */
4173 {
4174 struct tls_connection *conn = arg;
4175 int ret;
4176
4177 #if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
4178 if (conn == NULL || conn->session_ticket_cb == NULL)
4179 return 0;
4180
4181 ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx,
4182 conn->session_ticket,
4183 conn->session_ticket_len,
4184 s->s3->client_random,
4185 s->s3->server_random, secret);
4186 #else
4187 unsigned char client_random[SSL3_RANDOM_SIZE];
4188 unsigned char server_random[SSL3_RANDOM_SIZE];
4189
4190 if (conn == NULL || conn->session_ticket_cb == NULL)
4191 return 0;
4192
4193 SSL_get_client_random(s, client_random, sizeof(client_random));
4194 SSL_get_server_random(s, server_random, sizeof(server_random));
4195
4196 ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx,
4197 conn->session_ticket,
4198 conn->session_ticket_len,
4199 client_random,
4200 server_random, secret);
4201 #endif
4202
4203 os_free(conn->session_ticket);
4204 conn->session_ticket = NULL;
4205
4206 if (ret <= 0)
4207 return 0;
4208
4209 *secret_len = SSL_MAX_MASTER_KEY_LENGTH;
4210 return 1;
4211 }
4212
4213
tls_session_ticket_ext_cb(SSL * s,const unsigned char * data,int len,void * arg)4214 static int tls_session_ticket_ext_cb(SSL *s, const unsigned char *data,
4215 int len, void *arg)
4216 {
4217 struct tls_connection *conn = arg;
4218
4219 if (conn == NULL || conn->session_ticket_cb == NULL)
4220 return 0;
4221
4222 wpa_printf(MSG_DEBUG, "OpenSSL: %s: length=%d", __func__, len);
4223
4224 os_free(conn->session_ticket);
4225 conn->session_ticket = NULL;
4226
4227 wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket "
4228 "extension", data, len);
4229
4230 conn->session_ticket = os_malloc(len);
4231 if (conn->session_ticket == NULL)
4232 return 0;
4233
4234 os_memcpy(conn->session_ticket, data, len);
4235 conn->session_ticket_len = len;
4236
4237 return 1;
4238 }
4239 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
4240
4241
tls_connection_set_session_ticket_cb(void * tls_ctx,struct tls_connection * conn,tls_session_ticket_cb cb,void * ctx)4242 int tls_connection_set_session_ticket_cb(void *tls_ctx,
4243 struct tls_connection *conn,
4244 tls_session_ticket_cb cb,
4245 void *ctx)
4246 {
4247 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST)
4248 conn->session_ticket_cb = cb;
4249 conn->session_ticket_cb_ctx = ctx;
4250
4251 if (cb) {
4252 if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb,
4253 conn) != 1)
4254 return -1;
4255 SSL_set_session_ticket_ext_cb(conn->ssl,
4256 tls_session_ticket_ext_cb, conn);
4257 } else {
4258 if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1)
4259 return -1;
4260 SSL_set_session_ticket_ext_cb(conn->ssl, NULL, NULL);
4261 }
4262
4263 return 0;
4264 #else /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
4265 return -1;
4266 #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */
4267 }
4268
4269
tls_get_library_version(char * buf,size_t buf_len)4270 int tls_get_library_version(char *buf, size_t buf_len)
4271 {
4272 #if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
4273 return os_snprintf(buf, buf_len, "OpenSSL build=%s run=%s",
4274 OPENSSL_VERSION_TEXT,
4275 OpenSSL_version(OPENSSL_VERSION));
4276 #else
4277 return os_snprintf(buf, buf_len, "OpenSSL build=%s run=%s",
4278 OPENSSL_VERSION_TEXT,
4279 SSLeay_version(SSLEAY_VERSION));
4280 #endif
4281 }
4282
4283
tls_connection_set_success_data(struct tls_connection * conn,struct wpabuf * data)4284 void tls_connection_set_success_data(struct tls_connection *conn,
4285 struct wpabuf *data)
4286 {
4287 SSL_SESSION *sess;
4288 struct wpabuf *old;
4289
4290 if (tls_ex_idx_session < 0)
4291 goto fail;
4292 sess = SSL_get_session(conn->ssl);
4293 if (!sess)
4294 goto fail;
4295 old = SSL_SESSION_get_ex_data(sess, tls_ex_idx_session);
4296 if (old) {
4297 wpa_printf(MSG_DEBUG, "OpenSSL: Replacing old success data %p",
4298 old);
4299 wpabuf_free(old);
4300 }
4301 if (SSL_SESSION_set_ex_data(sess, tls_ex_idx_session, data) != 1)
4302 goto fail;
4303
4304 wpa_printf(MSG_DEBUG, "OpenSSL: Stored success data %p", data);
4305 conn->success_data = 1;
4306 return;
4307
4308 fail:
4309 wpa_printf(MSG_INFO, "OpenSSL: Failed to store success data");
4310 wpabuf_free(data);
4311 }
4312
4313
tls_connection_set_success_data_resumed(struct tls_connection * conn)4314 void tls_connection_set_success_data_resumed(struct tls_connection *conn)
4315 {
4316 wpa_printf(MSG_DEBUG,
4317 "OpenSSL: Success data accepted for resumed session");
4318 conn->success_data = 1;
4319 }
4320
4321
4322 const struct wpabuf *
tls_connection_get_success_data(struct tls_connection * conn)4323 tls_connection_get_success_data(struct tls_connection *conn)
4324 {
4325 SSL_SESSION *sess;
4326
4327 if (tls_ex_idx_session < 0 ||
4328 !(sess = SSL_get_session(conn->ssl)))
4329 return NULL;
4330 return SSL_SESSION_get_ex_data(sess, tls_ex_idx_session);
4331 }
4332
4333
tls_connection_remove_session(struct tls_connection * conn)4334 void tls_connection_remove_session(struct tls_connection *conn)
4335 {
4336 SSL_SESSION *sess;
4337
4338 sess = SSL_get_session(conn->ssl);
4339 if (!sess)
4340 return;
4341
4342 if (SSL_CTX_remove_session(conn->ssl_ctx, sess) != 1)
4343 wpa_printf(MSG_DEBUG,
4344 "OpenSSL: Session was not cached");
4345 else
4346 wpa_printf(MSG_DEBUG,
4347 "OpenSSL: Removed cached session to disable session resumption");
4348 }
4349