3 * Copyright 2015 gRPC authors.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
19 #include <grpc/support/port_platform.h>
21 #include "src/core/tsi/grpc_shadow_boringssl.h"
23 #include "src/core/tsi/ssl_transport_security.h"
28 /* TODO(jboeuf): refactor inet_ntop into a portability header. */
29 /* Note: for whomever reads this and tries to refactor this, this
30 can't be in grpc, it has to be in gpr. */
34 #include <arpa/inet.h>
35 #include <sys/socket.h>
38 #include <grpc/support/alloc.h>
39 #include <grpc/support/log.h>
40 #include <grpc/support/string_util.h>
41 #include <grpc/support/sync.h>
42 #include <grpc/support/thd_id.h>
45 #include <openssl/bio.h>
46 #include <openssl/crypto.h> /* For OPENSSL_free */
47 #include <openssl/err.h>
48 #include <openssl/ssl.h>
49 #include <openssl/x509.h>
50 #include <openssl/x509v3.h>
53 #include "src/core/lib/gpr/useful.h"
54 #include "src/core/tsi/ssl/session_cache/ssl_session_cache.h"
55 #include "src/core/tsi/ssl_types.h"
56 #include "src/core/tsi/transport_security.h"
58 /* --- Constants. ---*/
60 #define TSI_SSL_MAX_PROTECTED_FRAME_SIZE_UPPER_BOUND 16384
61 #define TSI_SSL_MAX_PROTECTED_FRAME_SIZE_LOWER_BOUND 1024
62 #define TSI_SSL_HANDSHAKER_OUTGOING_BUFFER_INITIAL_SIZE 1024
64 /* Putting a macro like this and littering the source file with #if is really
66 TODO(jboeuf): refactor all the #if / #endif in a separate module. */
67 #ifndef TSI_OPENSSL_ALPN_SUPPORT
68 #define TSI_OPENSSL_ALPN_SUPPORT 1
71 /* TODO(jboeuf): I have not found a way to get this number dynamically from the
72 SSL structure. This is what we would ultimately want though... */
73 #define TSI_SSL_MAX_PROTECTION_OVERHEAD 100
75 /* --- Structure definitions. ---*/
77 struct tsi_ssl_root_certs_store {
81 struct tsi_ssl_handshaker_factory {
82 const tsi_ssl_handshaker_factory_vtable* vtable;
83 gpr_refcount refcount;
86 struct tsi_ssl_client_handshaker_factory {
87 tsi_ssl_handshaker_factory base;
89 unsigned char* alpn_protocol_list;
90 size_t alpn_protocol_list_length;
91 grpc_core::RefCountedPtr<tsi::SslSessionLRUCache> session_cache;
94 struct tsi_ssl_server_handshaker_factory {
95 /* Several contexts to support SNI.
96 The tsi_peer array contains the subject names of the server certificates
97 associated with the contexts at the same index. */
98 tsi_ssl_handshaker_factory base;
99 SSL_CTX** ssl_contexts;
100 tsi_peer* ssl_context_x509_subject_names;
101 size_t ssl_context_count;
102 unsigned char* alpn_protocol_list;
103 size_t alpn_protocol_list_length;
111 unsigned char* outgoing_bytes_buffer;
112 size_t outgoing_bytes_buffer_size;
113 tsi_ssl_handshaker_factory* factory_ref;
114 } tsi_ssl_handshaker;
117 tsi_handshaker_result base;
120 unsigned char* unused_bytes;
121 size_t unused_bytes_size;
122 } tsi_ssl_handshaker_result;
125 tsi_frame_protector base;
128 unsigned char* buffer;
130 size_t buffer_offset;
131 } tsi_ssl_frame_protector;
133 /* --- Library Initialization. ---*/
135 static gpr_once g_init_openssl_once = GPR_ONCE_INIT;
136 static int g_ssl_ctx_ex_factory_index = -1;
137 static const unsigned char kSslSessionIdContext[] = {'g', 'r', 'p', 'c'};
139 #if OPENSSL_VERSION_NUMBER < 0x10100000
140 static gpr_mu* g_openssl_mutexes = nullptr;
141 static void openssl_locking_cb(int mode, int type, const char* file,
142 int line) GRPC_UNUSED;
143 static unsigned long openssl_thread_id_cb(void) GRPC_UNUSED;
145 static void openssl_locking_cb(int mode, int type, const char* file, int line) {
146 if (mode & CRYPTO_LOCK) {
147 gpr_mu_lock(&g_openssl_mutexes[type]);
149 gpr_mu_unlock(&g_openssl_mutexes[type]);
153 static unsigned long openssl_thread_id_cb(void) {
154 return static_cast<unsigned long>(gpr_thd_currentid());
158 static void init_openssl(void) {
159 #if OPENSSL_API_COMPAT >= 0x10100000L
160 OPENSSL_init_ssl(0, NULL);
163 SSL_load_error_strings();
164 OpenSSL_add_all_algorithms();
166 #if OPENSSL_VERSION_NUMBER < 0x10100000
167 if (!CRYPTO_get_locking_callback()) {
168 int num_locks = CRYPTO_num_locks();
169 GPR_ASSERT(num_locks > 0);
170 g_openssl_mutexes = static_cast<gpr_mu*>(
171 gpr_malloc(static_cast<size_t>(num_locks) * sizeof(gpr_mu)));
172 for (int i = 0; i < num_locks; i++) {
173 gpr_mu_init(&g_openssl_mutexes[i]);
175 CRYPTO_set_locking_callback(openssl_locking_cb);
176 CRYPTO_set_id_callback(openssl_thread_id_cb);
178 gpr_log(GPR_INFO, "OpenSSL callback has already been set.");
181 g_ssl_ctx_ex_factory_index =
182 SSL_CTX_get_ex_new_index(0, nullptr, nullptr, nullptr, nullptr);
183 GPR_ASSERT(g_ssl_ctx_ex_factory_index != -1);
186 /* --- Ssl utils. ---*/
188 static const char* ssl_error_string(int error) {
191 return "SSL_ERROR_NONE";
192 case SSL_ERROR_ZERO_RETURN:
193 return "SSL_ERROR_ZERO_RETURN";
194 case SSL_ERROR_WANT_READ:
195 return "SSL_ERROR_WANT_READ";
196 case SSL_ERROR_WANT_WRITE:
197 return "SSL_ERROR_WANT_WRITE";
198 case SSL_ERROR_WANT_CONNECT:
199 return "SSL_ERROR_WANT_CONNECT";
200 case SSL_ERROR_WANT_ACCEPT:
201 return "SSL_ERROR_WANT_ACCEPT";
202 case SSL_ERROR_WANT_X509_LOOKUP:
203 return "SSL_ERROR_WANT_X509_LOOKUP";
204 case SSL_ERROR_SYSCALL:
205 return "SSL_ERROR_SYSCALL";
207 return "SSL_ERROR_SSL";
209 return "Unknown error";
213 /* TODO(jboeuf): Remove when we are past the debugging phase with this code. */
214 static void ssl_log_where_info(const SSL* ssl, int where, int flag,
216 if ((where & flag) && GRPC_TRACE_FLAG_ENABLED(tsi_tracing_enabled)) {
217 gpr_log(GPR_INFO, "%20.20s - %30.30s - %5.10s", msg,
218 SSL_state_string_long(ssl), SSL_state_string(ssl));
222 /* Used for debugging. TODO(jboeuf): Remove when code is mature enough. */
223 static void ssl_info_callback(const SSL* ssl, int where, int ret) {
225 gpr_log(GPR_ERROR, "ssl_info_callback: error occurred.\n");
229 ssl_log_where_info(ssl, where, SSL_CB_LOOP, "LOOP");
230 ssl_log_where_info(ssl, where, SSL_CB_HANDSHAKE_START, "HANDSHAKE START");
231 ssl_log_where_info(ssl, where, SSL_CB_HANDSHAKE_DONE, "HANDSHAKE DONE");
234 /* Returns 1 if name looks like an IP address, 0 otherwise.
235 This is a very rough heuristic, and only handles IPv6 in hexadecimal form. */
236 static int looks_like_ip_address(const char* name) {
238 size_t dot_count = 0;
240 for (i = 0; i < strlen(name); i++) {
241 if (name[i] == ':') {
242 /* IPv6 Address in hexadecimal form, : is not allowed in DNS names. */
245 if (name[i] >= '0' && name[i] <= '9') {
246 if (num_size > 3) return 0;
248 } else if (name[i] == '.') {
249 if (dot_count > 3 || num_size == 0) return 0;
256 if (dot_count < 3 || num_size == 0) return 0;
260 /* Gets the subject CN from an X509 cert. */
261 static tsi_result ssl_get_x509_common_name(X509* cert, unsigned char** utf8,
263 int common_name_index = -1;
264 X509_NAME_ENTRY* common_name_entry = nullptr;
265 ASN1_STRING* common_name_asn1 = nullptr;
266 X509_NAME* subject_name = X509_get_subject_name(cert);
267 int utf8_returned_size = 0;
268 if (subject_name == nullptr) {
269 gpr_log(GPR_INFO, "Could not get subject name from certificate.");
270 return TSI_NOT_FOUND;
273 X509_NAME_get_index_by_NID(subject_name, NID_commonName, -1);
274 if (common_name_index == -1) {
275 gpr_log(GPR_INFO, "Could not get common name of subject from certificate.");
276 return TSI_NOT_FOUND;
278 common_name_entry = X509_NAME_get_entry(subject_name, common_name_index);
279 if (common_name_entry == nullptr) {
280 gpr_log(GPR_ERROR, "Could not get common name entry from certificate.");
281 return TSI_INTERNAL_ERROR;
283 common_name_asn1 = X509_NAME_ENTRY_get_data(common_name_entry);
284 if (common_name_asn1 == nullptr) {
286 "Could not get common name entry asn1 from certificate.");
287 return TSI_INTERNAL_ERROR;
289 utf8_returned_size = ASN1_STRING_to_UTF8(utf8, common_name_asn1);
290 if (utf8_returned_size < 0) {
291 gpr_log(GPR_ERROR, "Could not extract utf8 from asn1 string.");
292 return TSI_OUT_OF_RESOURCES;
294 *utf8_size = static_cast<size_t>(utf8_returned_size);
298 /* Gets the subject CN of an X509 cert as a tsi_peer_property. */
299 static tsi_result peer_property_from_x509_common_name(
300 X509* cert, tsi_peer_property* property) {
301 unsigned char* common_name;
302 size_t common_name_size;
304 ssl_get_x509_common_name(cert, &common_name, &common_name_size);
305 if (result != TSI_OK) {
306 if (result == TSI_NOT_FOUND) {
307 common_name = nullptr;
308 common_name_size = 0;
313 result = tsi_construct_string_peer_property(
314 TSI_X509_SUBJECT_COMMON_NAME_PEER_PROPERTY,
315 common_name == nullptr ? "" : reinterpret_cast<const char*>(common_name),
316 common_name_size, property);
317 OPENSSL_free(common_name);
321 /* Gets the X509 cert in PEM format as a tsi_peer_property. */
322 static tsi_result add_pem_certificate(X509* cert, tsi_peer_property* property) {
323 BIO* bio = BIO_new(BIO_s_mem());
324 if (!PEM_write_bio_X509(bio, cert)) {
326 return TSI_INTERNAL_ERROR;
329 long len = BIO_get_mem_data(bio, &contents);
332 return TSI_INTERNAL_ERROR;
334 tsi_result result = tsi_construct_string_peer_property(
335 TSI_X509_PEM_CERT_PROPERTY, (const char*)contents,
336 static_cast<size_t>(len), property);
341 /* Gets the subject SANs from an X509 cert as a tsi_peer_property. */
342 static tsi_result add_subject_alt_names_properties_to_peer(
343 tsi_peer* peer, GENERAL_NAMES* subject_alt_names,
344 size_t subject_alt_name_count) {
346 tsi_result result = TSI_OK;
348 /* Reset for DNS entries filtering. */
349 peer->property_count -= subject_alt_name_count;
351 for (i = 0; i < subject_alt_name_count; i++) {
352 GENERAL_NAME* subject_alt_name =
353 sk_GENERAL_NAME_value(subject_alt_names, TSI_SIZE_AS_SIZE(i));
354 /* Filter out the non-dns entries names. */
355 if (subject_alt_name->type == GEN_DNS) {
356 unsigned char* name = nullptr;
358 name_size = ASN1_STRING_to_UTF8(&name, subject_alt_name->d.dNSName);
360 gpr_log(GPR_ERROR, "Could not get utf8 from asn1 string.");
361 result = TSI_INTERNAL_ERROR;
364 result = tsi_construct_string_peer_property(
365 TSI_X509_SUBJECT_ALTERNATIVE_NAME_PEER_PROPERTY,
366 reinterpret_cast<const char*>(name), static_cast<size_t>(name_size),
367 &peer->properties[peer->property_count++]);
369 } else if (subject_alt_name->type == GEN_IPADD) {
370 char ntop_buf[INET6_ADDRSTRLEN];
373 if (subject_alt_name->d.iPAddress->length == 4) {
375 } else if (subject_alt_name->d.iPAddress->length == 16) {
378 gpr_log(GPR_ERROR, "SAN IP Address contained invalid IP");
379 result = TSI_INTERNAL_ERROR;
382 const char* name = inet_ntop(af, subject_alt_name->d.iPAddress->data,
383 ntop_buf, INET6_ADDRSTRLEN);
384 if (name == nullptr) {
385 gpr_log(GPR_ERROR, "Could not get IP string from asn1 octet.");
386 result = TSI_INTERNAL_ERROR;
390 result = tsi_construct_string_peer_property_from_cstring(
391 TSI_X509_SUBJECT_ALTERNATIVE_NAME_PEER_PROPERTY, name,
392 &peer->properties[peer->property_count++]);
394 if (result != TSI_OK) break;
399 /* Gets information about the peer's X509 cert as a tsi_peer object. */
400 static tsi_result peer_from_x509(X509* cert, int include_certificate_type,
402 /* TODO(jboeuf): Maybe add more properties. */
403 GENERAL_NAMES* subject_alt_names = static_cast<GENERAL_NAMES*>(
404 X509_get_ext_d2i(cert, NID_subject_alt_name, nullptr, nullptr));
405 int subject_alt_name_count =
406 (subject_alt_names != nullptr)
407 ? static_cast<int>(sk_GENERAL_NAME_num(subject_alt_names))
409 size_t property_count;
411 GPR_ASSERT(subject_alt_name_count >= 0);
412 property_count = (include_certificate_type ? static_cast<size_t>(1) : 0) +
413 2 /* common name, certificate */ +
414 static_cast<size_t>(subject_alt_name_count);
415 result = tsi_construct_peer(property_count, peer);
416 if (result != TSI_OK) return result;
418 if (include_certificate_type) {
419 result = tsi_construct_string_peer_property_from_cstring(
420 TSI_CERTIFICATE_TYPE_PEER_PROPERTY, TSI_X509_CERTIFICATE_TYPE,
421 &peer->properties[0]);
422 if (result != TSI_OK) break;
424 result = peer_property_from_x509_common_name(
425 cert, &peer->properties[include_certificate_type ? 1 : 0]);
426 if (result != TSI_OK) break;
428 result = add_pem_certificate(
429 cert, &peer->properties[include_certificate_type ? 2 : 1]);
430 if (result != TSI_OK) break;
432 if (subject_alt_name_count != 0) {
433 result = add_subject_alt_names_properties_to_peer(
434 peer, subject_alt_names, static_cast<size_t>(subject_alt_name_count));
435 if (result != TSI_OK) break;
439 if (subject_alt_names != nullptr) {
440 sk_GENERAL_NAME_pop_free(subject_alt_names, GENERAL_NAME_free);
442 if (result != TSI_OK) tsi_peer_destruct(peer);
446 /* Logs the SSL error stack. */
447 static void log_ssl_error_stack(void) {
449 while ((err = ERR_get_error()) != 0) {
451 ERR_error_string_n(static_cast<uint32_t>(err), details, sizeof(details));
452 gpr_log(GPR_ERROR, "%s", details);
456 /* Performs an SSL_read and handle errors. */
457 static tsi_result do_ssl_read(SSL* ssl, unsigned char* unprotected_bytes,
458 size_t* unprotected_bytes_size) {
460 GPR_ASSERT(*unprotected_bytes_size <= INT_MAX);
461 read_from_ssl = SSL_read(ssl, unprotected_bytes,
462 static_cast<int>(*unprotected_bytes_size));
463 if (read_from_ssl <= 0) {
464 read_from_ssl = SSL_get_error(ssl, read_from_ssl);
465 switch (read_from_ssl) {
466 case SSL_ERROR_ZERO_RETURN: /* Received a close_notify alert. */
467 case SSL_ERROR_WANT_READ: /* We need more data to finish the frame. */
468 *unprotected_bytes_size = 0;
470 case SSL_ERROR_WANT_WRITE:
473 "Peer tried to renegotiate SSL connection. This is unsupported.");
474 return TSI_UNIMPLEMENTED;
476 gpr_log(GPR_ERROR, "Corruption detected.");
477 log_ssl_error_stack();
478 return TSI_DATA_CORRUPTED;
480 gpr_log(GPR_ERROR, "SSL_read failed with error %s.",
481 ssl_error_string(read_from_ssl));
482 return TSI_PROTOCOL_FAILURE;
485 *unprotected_bytes_size = static_cast<size_t>(read_from_ssl);
489 /* Performs an SSL_write and handle errors. */
490 static tsi_result do_ssl_write(SSL* ssl, unsigned char* unprotected_bytes,
491 size_t unprotected_bytes_size) {
492 int ssl_write_result;
493 GPR_ASSERT(unprotected_bytes_size <= INT_MAX);
494 ssl_write_result = SSL_write(ssl, unprotected_bytes,
495 static_cast<int>(unprotected_bytes_size));
496 if (ssl_write_result < 0) {
497 ssl_write_result = SSL_get_error(ssl, ssl_write_result);
498 if (ssl_write_result == SSL_ERROR_WANT_READ) {
500 "Peer tried to renegotiate SSL connection. This is unsupported.");
501 return TSI_UNIMPLEMENTED;
503 gpr_log(GPR_ERROR, "SSL_write failed with error %s.",
504 ssl_error_string(ssl_write_result));
505 return TSI_INTERNAL_ERROR;
511 /* Loads an in-memory PEM certificate chain into the SSL context. */
512 static tsi_result ssl_ctx_use_certificate_chain(SSL_CTX* context,
513 const char* pem_cert_chain,
514 size_t pem_cert_chain_size) {
515 tsi_result result = TSI_OK;
516 X509* certificate = nullptr;
518 GPR_ASSERT(pem_cert_chain_size <= INT_MAX);
519 pem = BIO_new_mem_buf((void*)pem_cert_chain,
520 static_cast<int>(pem_cert_chain_size));
521 if (pem == nullptr) return TSI_OUT_OF_RESOURCES;
524 certificate = PEM_read_bio_X509_AUX(pem, nullptr, nullptr, (void*)"");
525 if (certificate == nullptr) {
526 result = TSI_INVALID_ARGUMENT;
529 if (!SSL_CTX_use_certificate(context, certificate)) {
530 result = TSI_INVALID_ARGUMENT;
534 X509* certificate_authority =
535 PEM_read_bio_X509(pem, nullptr, nullptr, (void*)"");
536 if (certificate_authority == nullptr) {
538 break; /* Done reading. */
540 if (!SSL_CTX_add_extra_chain_cert(context, certificate_authority)) {
541 X509_free(certificate_authority);
542 result = TSI_INVALID_ARGUMENT;
545 /* We don't need to free certificate_authority as its ownership has been
546 transfered to the context. That is not the case for certificate though.
551 if (certificate != nullptr) X509_free(certificate);
556 /* Loads an in-memory PEM private key into the SSL context. */
557 static tsi_result ssl_ctx_use_private_key(SSL_CTX* context, const char* pem_key,
558 size_t pem_key_size) {
559 tsi_result result = TSI_OK;
560 EVP_PKEY* private_key = nullptr;
562 GPR_ASSERT(pem_key_size <= INT_MAX);
563 pem = BIO_new_mem_buf((void*)pem_key, static_cast<int>(pem_key_size));
564 if (pem == nullptr) return TSI_OUT_OF_RESOURCES;
566 private_key = PEM_read_bio_PrivateKey(pem, nullptr, nullptr, (void*)"");
567 if (private_key == nullptr) {
568 result = TSI_INVALID_ARGUMENT;
571 if (!SSL_CTX_use_PrivateKey(context, private_key)) {
572 result = TSI_INVALID_ARGUMENT;
576 if (private_key != nullptr) EVP_PKEY_free(private_key);
581 /* Loads in-memory PEM verification certs into the SSL context and optionally
582 returns the verification cert names (root_names can be NULL). */
583 static tsi_result x509_store_load_certs(X509_STORE* cert_store,
584 const char* pem_roots,
585 size_t pem_roots_size,
586 STACK_OF(X509_NAME) * *root_names) {
587 tsi_result result = TSI_OK;
588 size_t num_roots = 0;
589 X509* root = nullptr;
590 X509_NAME* root_name = nullptr;
592 GPR_ASSERT(pem_roots_size <= INT_MAX);
593 pem = BIO_new_mem_buf((void*)pem_roots, static_cast<int>(pem_roots_size));
594 if (cert_store == nullptr) return TSI_INVALID_ARGUMENT;
595 if (pem == nullptr) return TSI_OUT_OF_RESOURCES;
596 if (root_names != nullptr) {
597 *root_names = sk_X509_NAME_new_null();
598 if (*root_names == nullptr) return TSI_OUT_OF_RESOURCES;
602 root = PEM_read_bio_X509_AUX(pem, nullptr, nullptr, (void*)"");
603 if (root == nullptr) {
605 break; /* We're at the end of stream. */
607 if (root_names != nullptr) {
608 root_name = X509_get_subject_name(root);
609 if (root_name == nullptr) {
610 gpr_log(GPR_ERROR, "Could not get name from root certificate.");
611 result = TSI_INVALID_ARGUMENT;
614 root_name = X509_NAME_dup(root_name);
615 if (root_name == nullptr) {
616 result = TSI_OUT_OF_RESOURCES;
619 sk_X509_NAME_push(*root_names, root_name);
623 if (!X509_STORE_add_cert(cert_store, root)) {
624 unsigned long error = ERR_get_error();
625 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
626 ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE) {
627 gpr_log(GPR_ERROR, "Could not add root certificate to ssl context.");
628 result = TSI_INTERNAL_ERROR;
635 if (num_roots == 0) {
636 gpr_log(GPR_ERROR, "Could not load any root certificate.");
637 result = TSI_INVALID_ARGUMENT;
640 if (result != TSI_OK) {
641 if (root != nullptr) X509_free(root);
642 if (root_names != nullptr) {
643 sk_X509_NAME_pop_free(*root_names, X509_NAME_free);
644 *root_names = nullptr;
645 if (root_name != nullptr) X509_NAME_free(root_name);
652 static tsi_result ssl_ctx_load_verification_certs(SSL_CTX* context,
653 const char* pem_roots,
654 size_t pem_roots_size,
655 STACK_OF(X509_NAME) *
657 X509_STORE* cert_store = SSL_CTX_get_cert_store(context);
658 X509_STORE_set_flags(cert_store,
659 X509_V_FLAG_PARTIAL_CHAIN | X509_V_FLAG_TRUSTED_FIRST);
660 return x509_store_load_certs(cert_store, pem_roots, pem_roots_size,
664 /* Populates the SSL context with a private key and a cert chain, and sets the
665 cipher list and the ephemeral ECDH key. */
666 static tsi_result populate_ssl_context(
667 SSL_CTX* context, const tsi_ssl_pem_key_cert_pair* key_cert_pair,
668 const char* cipher_list) {
669 tsi_result result = TSI_OK;
670 if (key_cert_pair != nullptr) {
671 if (key_cert_pair->cert_chain != nullptr) {
672 result = ssl_ctx_use_certificate_chain(context, key_cert_pair->cert_chain,
673 strlen(key_cert_pair->cert_chain));
674 if (result != TSI_OK) {
675 gpr_log(GPR_ERROR, "Invalid cert chain file.");
679 if (key_cert_pair->private_key != nullptr) {
680 result = ssl_ctx_use_private_key(context, key_cert_pair->private_key,
681 strlen(key_cert_pair->private_key));
682 if (result != TSI_OK || !SSL_CTX_check_private_key(context)) {
683 gpr_log(GPR_ERROR, "Invalid private key.");
684 return result != TSI_OK ? result : TSI_INVALID_ARGUMENT;
688 if ((cipher_list != nullptr) &&
689 !SSL_CTX_set_cipher_list(context, cipher_list)) {
690 gpr_log(GPR_ERROR, "Invalid cipher list: %s.", cipher_list);
691 return TSI_INVALID_ARGUMENT;
694 EC_KEY* ecdh = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
695 if (!SSL_CTX_set_tmp_ecdh(context, ecdh)) {
696 gpr_log(GPR_ERROR, "Could not set ephemeral ECDH key.");
698 return TSI_INTERNAL_ERROR;
700 SSL_CTX_set_options(context, SSL_OP_SINGLE_ECDH_USE);
706 /* Extracts the CN and the SANs from an X509 cert as a peer object. */
707 static tsi_result extract_x509_subject_names_from_pem_cert(const char* pem_cert,
709 tsi_result result = TSI_OK;
710 X509* cert = nullptr;
712 pem = BIO_new_mem_buf((void*)pem_cert, static_cast<int>(strlen(pem_cert)));
713 if (pem == nullptr) return TSI_OUT_OF_RESOURCES;
715 cert = PEM_read_bio_X509(pem, nullptr, nullptr, (void*)"");
716 if (cert == nullptr) {
717 gpr_log(GPR_ERROR, "Invalid certificate");
718 result = TSI_INVALID_ARGUMENT;
720 result = peer_from_x509(cert, 0, peer);
722 if (cert != nullptr) X509_free(cert);
727 /* Builds the alpn protocol name list according to rfc 7301. */
728 static tsi_result build_alpn_protocol_name_list(
729 const char** alpn_protocols, uint16_t num_alpn_protocols,
730 unsigned char** protocol_name_list, size_t* protocol_name_list_length) {
732 unsigned char* current;
733 *protocol_name_list = nullptr;
734 *protocol_name_list_length = 0;
735 if (num_alpn_protocols == 0) return TSI_INVALID_ARGUMENT;
736 for (i = 0; i < num_alpn_protocols; i++) {
738 alpn_protocols[i] == nullptr ? 0 : strlen(alpn_protocols[i]);
739 if (length == 0 || length > 255) {
740 gpr_log(GPR_ERROR, "Invalid protocol name length: %d.",
741 static_cast<int>(length));
742 return TSI_INVALID_ARGUMENT;
744 *protocol_name_list_length += length + 1;
746 *protocol_name_list =
747 static_cast<unsigned char*>(gpr_malloc(*protocol_name_list_length));
748 if (*protocol_name_list == nullptr) return TSI_OUT_OF_RESOURCES;
749 current = *protocol_name_list;
750 for (i = 0; i < num_alpn_protocols; i++) {
751 size_t length = strlen(alpn_protocols[i]);
752 *(current++) = static_cast<uint8_t>(length); /* max checked above. */
753 memcpy(current, alpn_protocols[i], length);
757 if ((current < *protocol_name_list) ||
758 (static_cast<uintptr_t>(current - *protocol_name_list) !=
759 *protocol_name_list_length)) {
760 return TSI_INTERNAL_ERROR;
765 // The verification callback is used for clients that don't really care about
766 // the server's certificate, but we need to pull it anyway, in case a higher
767 // layer wants to look at it. In this case the verification may fail, but
768 // we don't really care.
769 static int NullVerifyCallback(int preverify_ok, X509_STORE_CTX* ctx) {
773 /* --- tsi_ssl_root_certs_store methods implementation. ---*/
775 tsi_ssl_root_certs_store* tsi_ssl_root_certs_store_create(
776 const char* pem_roots) {
777 if (pem_roots == nullptr) {
778 gpr_log(GPR_ERROR, "The root certificates are empty.");
781 tsi_ssl_root_certs_store* root_store = static_cast<tsi_ssl_root_certs_store*>(
782 gpr_zalloc(sizeof(tsi_ssl_root_certs_store)));
783 if (root_store == nullptr) {
784 gpr_log(GPR_ERROR, "Could not allocate buffer for ssl_root_certs_store.");
787 root_store->store = X509_STORE_new();
788 if (root_store->store == nullptr) {
789 gpr_log(GPR_ERROR, "Could not allocate buffer for X509_STORE.");
790 gpr_free(root_store);
793 tsi_result result = x509_store_load_certs(root_store->store, pem_roots,
794 strlen(pem_roots), nullptr);
795 if (result != TSI_OK) {
796 gpr_log(GPR_ERROR, "Could not load root certificates.");
797 X509_STORE_free(root_store->store);
798 gpr_free(root_store);
804 void tsi_ssl_root_certs_store_destroy(tsi_ssl_root_certs_store* self) {
805 if (self == nullptr) return;
806 X509_STORE_free(self->store);
810 /* --- tsi_ssl_session_cache methods implementation. ---*/
812 tsi_ssl_session_cache* tsi_ssl_session_cache_create_lru(size_t capacity) {
813 /* Pointer will be dereferenced by unref call. */
814 return reinterpret_cast<tsi_ssl_session_cache*>(
815 tsi::SslSessionLRUCache::Create(capacity).release());
818 void tsi_ssl_session_cache_ref(tsi_ssl_session_cache* cache) {
819 /* Pointer will be dereferenced by unref call. */
820 reinterpret_cast<tsi::SslSessionLRUCache*>(cache)->Ref().release();
823 void tsi_ssl_session_cache_unref(tsi_ssl_session_cache* cache) {
824 reinterpret_cast<tsi::SslSessionLRUCache*>(cache)->Unref();
827 /* --- tsi_frame_protector methods implementation. ---*/
829 static tsi_result ssl_protector_protect(tsi_frame_protector* self,
830 const unsigned char* unprotected_bytes,
831 size_t* unprotected_bytes_size,
832 unsigned char* protected_output_frames,
833 size_t* protected_output_frames_size) {
834 tsi_ssl_frame_protector* impl =
835 reinterpret_cast<tsi_ssl_frame_protector*>(self);
838 tsi_result result = TSI_OK;
840 /* First see if we have some pending data in the SSL BIO. */
841 int pending_in_ssl = static_cast<int>(BIO_pending(impl->network_io));
842 if (pending_in_ssl > 0) {
843 *unprotected_bytes_size = 0;
844 GPR_ASSERT(*protected_output_frames_size <= INT_MAX);
845 read_from_ssl = BIO_read(impl->network_io, protected_output_frames,
846 static_cast<int>(*protected_output_frames_size));
847 if (read_from_ssl < 0) {
849 "Could not read from BIO even though some data is pending");
850 return TSI_INTERNAL_ERROR;
852 *protected_output_frames_size = static_cast<size_t>(read_from_ssl);
856 /* Now see if we can send a complete frame. */
857 available = impl->buffer_size - impl->buffer_offset;
858 if (available > *unprotected_bytes_size) {
859 /* If we cannot, just copy the data in our internal buffer. */
860 memcpy(impl->buffer + impl->buffer_offset, unprotected_bytes,
861 *unprotected_bytes_size);
862 impl->buffer_offset += *unprotected_bytes_size;
863 *protected_output_frames_size = 0;
867 /* If we can, prepare the buffer, send it to SSL_write and read. */
868 memcpy(impl->buffer + impl->buffer_offset, unprotected_bytes, available);
869 result = do_ssl_write(impl->ssl, impl->buffer, impl->buffer_size);
870 if (result != TSI_OK) return result;
872 GPR_ASSERT(*protected_output_frames_size <= INT_MAX);
873 read_from_ssl = BIO_read(impl->network_io, protected_output_frames,
874 static_cast<int>(*protected_output_frames_size));
875 if (read_from_ssl < 0) {
876 gpr_log(GPR_ERROR, "Could not read from BIO after SSL_write.");
877 return TSI_INTERNAL_ERROR;
879 *protected_output_frames_size = static_cast<size_t>(read_from_ssl);
880 *unprotected_bytes_size = available;
881 impl->buffer_offset = 0;
885 static tsi_result ssl_protector_protect_flush(
886 tsi_frame_protector* self, unsigned char* protected_output_frames,
887 size_t* protected_output_frames_size, size_t* still_pending_size) {
888 tsi_result result = TSI_OK;
889 tsi_ssl_frame_protector* impl =
890 reinterpret_cast<tsi_ssl_frame_protector*>(self);
891 int read_from_ssl = 0;
894 if (impl->buffer_offset != 0) {
895 result = do_ssl_write(impl->ssl, impl->buffer, impl->buffer_offset);
896 if (result != TSI_OK) return result;
897 impl->buffer_offset = 0;
900 pending = static_cast<int>(BIO_pending(impl->network_io));
901 GPR_ASSERT(pending >= 0);
902 *still_pending_size = static_cast<size_t>(pending);
903 if (*still_pending_size == 0) return TSI_OK;
905 GPR_ASSERT(*protected_output_frames_size <= INT_MAX);
906 read_from_ssl = BIO_read(impl->network_io, protected_output_frames,
907 static_cast<int>(*protected_output_frames_size));
908 if (read_from_ssl <= 0) {
909 gpr_log(GPR_ERROR, "Could not read from BIO after SSL_write.");
910 return TSI_INTERNAL_ERROR;
912 *protected_output_frames_size = static_cast<size_t>(read_from_ssl);
913 pending = static_cast<int>(BIO_pending(impl->network_io));
914 GPR_ASSERT(pending >= 0);
915 *still_pending_size = static_cast<size_t>(pending);
919 static tsi_result ssl_protector_unprotect(
920 tsi_frame_protector* self, const unsigned char* protected_frames_bytes,
921 size_t* protected_frames_bytes_size, unsigned char* unprotected_bytes,
922 size_t* unprotected_bytes_size) {
923 tsi_result result = TSI_OK;
924 int written_into_ssl = 0;
925 size_t output_bytes_size = *unprotected_bytes_size;
926 size_t output_bytes_offset = 0;
927 tsi_ssl_frame_protector* impl =
928 reinterpret_cast<tsi_ssl_frame_protector*>(self);
930 /* First, try to read remaining data from ssl. */
931 result = do_ssl_read(impl->ssl, unprotected_bytes, unprotected_bytes_size);
932 if (result != TSI_OK) return result;
933 if (*unprotected_bytes_size == output_bytes_size) {
934 /* We have read everything we could and cannot process any more input. */
935 *protected_frames_bytes_size = 0;
938 output_bytes_offset = *unprotected_bytes_size;
939 unprotected_bytes += output_bytes_offset;
940 *unprotected_bytes_size = output_bytes_size - output_bytes_offset;
942 /* Then, try to write some data to ssl. */
943 GPR_ASSERT(*protected_frames_bytes_size <= INT_MAX);
944 written_into_ssl = BIO_write(impl->network_io, protected_frames_bytes,
945 static_cast<int>(*protected_frames_bytes_size));
946 if (written_into_ssl < 0) {
947 gpr_log(GPR_ERROR, "Sending protected frame to ssl failed with %d",
949 return TSI_INTERNAL_ERROR;
951 *protected_frames_bytes_size = static_cast<size_t>(written_into_ssl);
953 /* Now try to read some data again. */
954 result = do_ssl_read(impl->ssl, unprotected_bytes, unprotected_bytes_size);
955 if (result == TSI_OK) {
956 /* Don't forget to output the total number of bytes read. */
957 *unprotected_bytes_size += output_bytes_offset;
962 static void ssl_protector_destroy(tsi_frame_protector* self) {
963 tsi_ssl_frame_protector* impl =
964 reinterpret_cast<tsi_ssl_frame_protector*>(self);
965 if (impl->buffer != nullptr) gpr_free(impl->buffer);
966 if (impl->ssl != nullptr) SSL_free(impl->ssl);
967 if (impl->network_io != nullptr) BIO_free(impl->network_io);
971 static const tsi_frame_protector_vtable frame_protector_vtable = {
972 ssl_protector_protect,
973 ssl_protector_protect_flush,
974 ssl_protector_unprotect,
975 ssl_protector_destroy,
978 /* --- tsi_server_handshaker_factory methods implementation. --- */
980 static void tsi_ssl_handshaker_factory_destroy(
981 tsi_ssl_handshaker_factory* self) {
982 if (self == nullptr) return;
984 if (self->vtable != nullptr && self->vtable->destroy != nullptr) {
985 self->vtable->destroy(self);
987 /* Note, we don't free(self) here because this object is always directly
988 * embedded in another object. If tsi_ssl_handshaker_factory_init allocates
989 * any memory, it should be free'd here. */
992 static tsi_ssl_handshaker_factory* tsi_ssl_handshaker_factory_ref(
993 tsi_ssl_handshaker_factory* self) {
994 if (self == nullptr) return nullptr;
995 gpr_refn(&self->refcount, 1);
999 static void tsi_ssl_handshaker_factory_unref(tsi_ssl_handshaker_factory* self) {
1000 if (self == nullptr) return;
1002 if (gpr_unref(&self->refcount)) {
1003 tsi_ssl_handshaker_factory_destroy(self);
1007 static tsi_ssl_handshaker_factory_vtable handshaker_factory_vtable = {nullptr};
1009 /* Initializes a tsi_ssl_handshaker_factory object. Caller is responsible for
1010 * allocating memory for the factory. */
1011 static void tsi_ssl_handshaker_factory_init(
1012 tsi_ssl_handshaker_factory* factory) {
1013 GPR_ASSERT(factory != nullptr);
1015 factory->vtable = &handshaker_factory_vtable;
1016 gpr_ref_init(&factory->refcount, 1);
1019 /* --- tsi_handshaker_result methods implementation. ---*/
1020 static tsi_result ssl_handshaker_result_extract_peer(
1021 const tsi_handshaker_result* self, tsi_peer* peer) {
1022 tsi_result result = TSI_OK;
1023 const unsigned char* alpn_selected = nullptr;
1024 unsigned int alpn_selected_len;
1025 const tsi_ssl_handshaker_result* impl =
1026 reinterpret_cast<const tsi_ssl_handshaker_result*>(self);
1027 // TODO(yihuazhang): Return a full certificate chain as a peer property.
1028 X509* peer_cert = SSL_get_peer_certificate(impl->ssl);
1029 if (peer_cert != nullptr) {
1030 result = peer_from_x509(peer_cert, 1, peer);
1031 X509_free(peer_cert);
1032 if (result != TSI_OK) return result;
1034 #if TSI_OPENSSL_ALPN_SUPPORT
1035 SSL_get0_alpn_selected(impl->ssl, &alpn_selected, &alpn_selected_len);
1036 #endif /* TSI_OPENSSL_ALPN_SUPPORT */
1037 if (alpn_selected == nullptr) {
1039 SSL_get0_next_proto_negotiated(impl->ssl, &alpn_selected,
1040 &alpn_selected_len);
1043 // 1 is for session reused property.
1044 size_t new_property_count = peer->property_count + 1;
1045 if (alpn_selected != nullptr) new_property_count++;
1046 tsi_peer_property* new_properties = static_cast<tsi_peer_property*>(
1047 gpr_zalloc(sizeof(*new_properties) * new_property_count));
1048 for (size_t i = 0; i < peer->property_count; i++) {
1049 new_properties[i] = peer->properties[i];
1051 if (peer->properties != nullptr) gpr_free(peer->properties);
1052 peer->properties = new_properties;
1054 if (alpn_selected != nullptr) {
1055 result = tsi_construct_string_peer_property(
1056 TSI_SSL_ALPN_SELECTED_PROTOCOL,
1057 reinterpret_cast<const char*>(alpn_selected), alpn_selected_len,
1058 &peer->properties[peer->property_count]);
1059 if (result != TSI_OK) return result;
1060 peer->property_count++;
1063 const char* session_reused = SSL_session_reused(impl->ssl) ? "true" : "false";
1064 result = tsi_construct_string_peer_property_from_cstring(
1065 TSI_SSL_SESSION_REUSED_PEER_PROPERTY, session_reused,
1066 &peer->properties[peer->property_count]);
1067 if (result != TSI_OK) return result;
1068 peer->property_count++;
1072 static tsi_result ssl_handshaker_result_create_frame_protector(
1073 const tsi_handshaker_result* self, size_t* max_output_protected_frame_size,
1074 tsi_frame_protector** protector) {
1075 size_t actual_max_output_protected_frame_size =
1076 TSI_SSL_MAX_PROTECTED_FRAME_SIZE_UPPER_BOUND;
1077 tsi_ssl_handshaker_result* impl =
1078 reinterpret_cast<tsi_ssl_handshaker_result*>(
1079 const_cast<tsi_handshaker_result*>(self));
1080 tsi_ssl_frame_protector* protector_impl =
1081 static_cast<tsi_ssl_frame_protector*>(
1082 gpr_zalloc(sizeof(*protector_impl)));
1084 if (max_output_protected_frame_size != nullptr) {
1085 if (*max_output_protected_frame_size >
1086 TSI_SSL_MAX_PROTECTED_FRAME_SIZE_UPPER_BOUND) {
1087 *max_output_protected_frame_size =
1088 TSI_SSL_MAX_PROTECTED_FRAME_SIZE_UPPER_BOUND;
1089 } else if (*max_output_protected_frame_size <
1090 TSI_SSL_MAX_PROTECTED_FRAME_SIZE_LOWER_BOUND) {
1091 *max_output_protected_frame_size =
1092 TSI_SSL_MAX_PROTECTED_FRAME_SIZE_LOWER_BOUND;
1094 actual_max_output_protected_frame_size = *max_output_protected_frame_size;
1096 protector_impl->buffer_size =
1097 actual_max_output_protected_frame_size - TSI_SSL_MAX_PROTECTION_OVERHEAD;
1098 protector_impl->buffer =
1099 static_cast<unsigned char*>(gpr_malloc(protector_impl->buffer_size));
1100 if (protector_impl->buffer == nullptr) {
1102 "Could not allocated buffer for tsi_ssl_frame_protector.");
1103 gpr_free(protector_impl);
1104 return TSI_INTERNAL_ERROR;
1107 /* Transfer ownership of ssl and network_io to the frame protector. */
1108 protector_impl->ssl = impl->ssl;
1109 impl->ssl = nullptr;
1110 protector_impl->network_io = impl->network_io;
1111 impl->network_io = nullptr;
1112 protector_impl->base.vtable = &frame_protector_vtable;
1113 *protector = &protector_impl->base;
1117 static tsi_result ssl_handshaker_result_get_unused_bytes(
1118 const tsi_handshaker_result* self, const unsigned char** bytes,
1119 size_t* bytes_size) {
1120 const tsi_ssl_handshaker_result* impl =
1121 reinterpret_cast<const tsi_ssl_handshaker_result*>(self);
1122 *bytes_size = impl->unused_bytes_size;
1123 *bytes = impl->unused_bytes;
1127 static void ssl_handshaker_result_destroy(tsi_handshaker_result* self) {
1128 tsi_ssl_handshaker_result* impl =
1129 reinterpret_cast<tsi_ssl_handshaker_result*>(self);
1130 SSL_free(impl->ssl);
1131 BIO_free(impl->network_io);
1132 gpr_free(impl->unused_bytes);
1136 static const tsi_handshaker_result_vtable handshaker_result_vtable = {
1137 ssl_handshaker_result_extract_peer,
1138 nullptr, /* create_zero_copy_grpc_protector */
1139 ssl_handshaker_result_create_frame_protector,
1140 ssl_handshaker_result_get_unused_bytes,
1141 ssl_handshaker_result_destroy,
1144 static tsi_result ssl_handshaker_result_create(
1145 tsi_ssl_handshaker* handshaker, const unsigned char* unused_bytes,
1146 size_t unused_bytes_size, tsi_handshaker_result** handshaker_result) {
1147 if (handshaker == nullptr || handshaker_result == nullptr ||
1148 (unused_bytes_size > 0 && unused_bytes == nullptr)) {
1149 return TSI_INVALID_ARGUMENT;
1151 tsi_ssl_handshaker_result* result =
1152 static_cast<tsi_ssl_handshaker_result*>(gpr_zalloc(sizeof(*result)));
1153 result->base.vtable = &handshaker_result_vtable;
1154 /* Transfer ownership of ssl and network_io to the handshaker result. */
1155 result->ssl = handshaker->ssl;
1156 handshaker->ssl = nullptr;
1157 result->network_io = handshaker->network_io;
1158 handshaker->network_io = nullptr;
1159 if (unused_bytes_size > 0) {
1160 result->unused_bytes =
1161 static_cast<unsigned char*>(gpr_malloc(unused_bytes_size));
1162 memcpy(result->unused_bytes, unused_bytes, unused_bytes_size);
1164 result->unused_bytes_size = unused_bytes_size;
1165 *handshaker_result = &result->base;
1169 /* --- tsi_handshaker methods implementation. ---*/
1171 static tsi_result ssl_handshaker_get_bytes_to_send_to_peer(
1172 tsi_ssl_handshaker* impl, unsigned char* bytes, size_t* bytes_size) {
1173 int bytes_read_from_ssl = 0;
1174 if (bytes == nullptr || bytes_size == nullptr || *bytes_size == 0 ||
1175 *bytes_size > INT_MAX) {
1176 return TSI_INVALID_ARGUMENT;
1178 GPR_ASSERT(*bytes_size <= INT_MAX);
1179 bytes_read_from_ssl =
1180 BIO_read(impl->network_io, bytes, static_cast<int>(*bytes_size));
1181 if (bytes_read_from_ssl < 0) {
1183 if (!BIO_should_retry(impl->network_io)) {
1184 impl->result = TSI_INTERNAL_ERROR;
1185 return impl->result;
1190 *bytes_size = static_cast<size_t>(bytes_read_from_ssl);
1191 return BIO_pending(impl->network_io) == 0 ? TSI_OK : TSI_INCOMPLETE_DATA;
1194 static tsi_result ssl_handshaker_get_result(tsi_ssl_handshaker* impl) {
1195 if ((impl->result == TSI_HANDSHAKE_IN_PROGRESS) &&
1196 SSL_is_init_finished(impl->ssl)) {
1197 impl->result = TSI_OK;
1199 return impl->result;
1202 static tsi_result ssl_handshaker_process_bytes_from_peer(
1203 tsi_ssl_handshaker* impl, const unsigned char* bytes, size_t* bytes_size) {
1204 int bytes_written_into_ssl_size = 0;
1205 if (bytes == nullptr || bytes_size == nullptr || *bytes_size > INT_MAX) {
1206 return TSI_INVALID_ARGUMENT;
1208 GPR_ASSERT(*bytes_size <= INT_MAX);
1209 bytes_written_into_ssl_size =
1210 BIO_write(impl->network_io, bytes, static_cast<int>(*bytes_size));
1211 if (bytes_written_into_ssl_size < 0) {
1212 gpr_log(GPR_ERROR, "Could not write to memory BIO.");
1213 impl->result = TSI_INTERNAL_ERROR;
1214 return impl->result;
1216 *bytes_size = static_cast<size_t>(bytes_written_into_ssl_size);
1218 if (ssl_handshaker_get_result(impl) != TSI_HANDSHAKE_IN_PROGRESS) {
1219 impl->result = TSI_OK;
1220 return impl->result;
1222 /* Get ready to get some bytes from SSL. */
1223 int ssl_result = SSL_do_handshake(impl->ssl);
1224 ssl_result = SSL_get_error(impl->ssl, ssl_result);
1225 switch (ssl_result) {
1226 case SSL_ERROR_WANT_READ:
1227 if (BIO_pending(impl->network_io) == 0) {
1228 /* We need more data. */
1229 return TSI_INCOMPLETE_DATA;
1233 case SSL_ERROR_NONE:
1237 ERR_error_string_n(ERR_get_error(), err_str, sizeof(err_str));
1238 gpr_log(GPR_ERROR, "Handshake failed with fatal error %s: %s.",
1239 ssl_error_string(ssl_result), err_str);
1240 impl->result = TSI_PROTOCOL_FAILURE;
1241 return impl->result;
1247 static void ssl_handshaker_destroy(tsi_handshaker* self) {
1248 tsi_ssl_handshaker* impl = reinterpret_cast<tsi_ssl_handshaker*>(self);
1249 SSL_free(impl->ssl);
1250 BIO_free(impl->network_io);
1251 gpr_free(impl->outgoing_bytes_buffer);
1252 tsi_ssl_handshaker_factory_unref(impl->factory_ref);
1256 static tsi_result ssl_handshaker_next(
1257 tsi_handshaker* self, const unsigned char* received_bytes,
1258 size_t received_bytes_size, const unsigned char** bytes_to_send,
1259 size_t* bytes_to_send_size, tsi_handshaker_result** handshaker_result,
1260 tsi_handshaker_on_next_done_cb cb, void* user_data) {
1261 /* Input sanity check. */
1262 if ((received_bytes_size > 0 && received_bytes == nullptr) ||
1263 bytes_to_send == nullptr || bytes_to_send_size == nullptr ||
1264 handshaker_result == nullptr) {
1265 return TSI_INVALID_ARGUMENT;
1267 /* If there are received bytes, process them first. */
1268 tsi_ssl_handshaker* impl = reinterpret_cast<tsi_ssl_handshaker*>(self);
1269 tsi_result status = TSI_OK;
1270 size_t bytes_consumed = received_bytes_size;
1271 if (received_bytes_size > 0) {
1272 status = ssl_handshaker_process_bytes_from_peer(impl, received_bytes,
1274 if (status != TSI_OK) return status;
1276 /* Get bytes to send to the peer, if available. */
1279 size_t to_send_size = impl->outgoing_bytes_buffer_size - offset;
1280 status = ssl_handshaker_get_bytes_to_send_to_peer(
1281 impl, impl->outgoing_bytes_buffer + offset, &to_send_size);
1282 offset += to_send_size;
1283 if (status == TSI_INCOMPLETE_DATA) {
1284 impl->outgoing_bytes_buffer_size *= 2;
1285 impl->outgoing_bytes_buffer = static_cast<unsigned char*>(gpr_realloc(
1286 impl->outgoing_bytes_buffer, impl->outgoing_bytes_buffer_size));
1288 } while (status == TSI_INCOMPLETE_DATA);
1289 if (status != TSI_OK) return status;
1290 *bytes_to_send = impl->outgoing_bytes_buffer;
1291 *bytes_to_send_size = offset;
1292 /* If handshake completes, create tsi_handshaker_result. */
1293 if (ssl_handshaker_get_result(impl) == TSI_HANDSHAKE_IN_PROGRESS) {
1294 *handshaker_result = nullptr;
1296 size_t unused_bytes_size = received_bytes_size - bytes_consumed;
1297 const unsigned char* unused_bytes =
1298 unused_bytes_size == 0 ? nullptr : received_bytes + bytes_consumed;
1299 status = ssl_handshaker_result_create(impl, unused_bytes, unused_bytes_size,
1301 if (status == TSI_OK) {
1302 /* Indicates that the handshake has completed and that a handshaker_result
1303 * has been created. */
1304 self->handshaker_result_created = true;
1310 static const tsi_handshaker_vtable handshaker_vtable = {
1311 nullptr, /* get_bytes_to_send_to_peer -- deprecated */
1312 nullptr, /* process_bytes_from_peer -- deprecated */
1313 nullptr, /* get_result -- deprecated */
1314 nullptr, /* extract_peer -- deprecated */
1315 nullptr, /* create_frame_protector -- deprecated */
1316 ssl_handshaker_destroy,
1317 ssl_handshaker_next,
1318 nullptr, /* shutdown */
1321 /* --- tsi_ssl_handshaker_factory common methods. --- */
1323 static void tsi_ssl_handshaker_resume_session(
1324 SSL* ssl, tsi::SslSessionLRUCache* session_cache) {
1325 const char* server_name = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name);
1326 if (server_name == nullptr) {
1329 tsi::SslSessionPtr session = session_cache->Get(server_name);
1330 if (session != nullptr) {
1331 // SSL_set_session internally increments reference counter.
1332 SSL_set_session(ssl, session.get());
1336 static tsi_result create_tsi_ssl_handshaker(SSL_CTX* ctx, int is_client,
1337 const char* server_name_indication,
1338 tsi_ssl_handshaker_factory* factory,
1339 tsi_handshaker** handshaker) {
1340 SSL* ssl = SSL_new(ctx);
1341 BIO* network_io = nullptr;
1342 BIO* ssl_io = nullptr;
1343 tsi_ssl_handshaker* impl = nullptr;
1344 *handshaker = nullptr;
1345 if (ctx == nullptr) {
1346 gpr_log(GPR_ERROR, "SSL Context is null. Should never happen.");
1347 return TSI_INTERNAL_ERROR;
1349 if (ssl == nullptr) {
1350 return TSI_OUT_OF_RESOURCES;
1352 SSL_set_info_callback(ssl, ssl_info_callback);
1354 if (!BIO_new_bio_pair(&network_io, 0, &ssl_io, 0)) {
1355 gpr_log(GPR_ERROR, "BIO_new_bio_pair failed.");
1357 return TSI_OUT_OF_RESOURCES;
1359 SSL_set_bio(ssl, ssl_io, ssl_io);
1362 SSL_set_connect_state(ssl);
1363 if (server_name_indication != nullptr) {
1364 if (!SSL_set_tlsext_host_name(ssl, server_name_indication)) {
1365 gpr_log(GPR_ERROR, "Invalid server name indication %s.",
1366 server_name_indication);
1368 BIO_free(network_io);
1369 return TSI_INTERNAL_ERROR;
1372 tsi_ssl_client_handshaker_factory* client_factory =
1373 reinterpret_cast<tsi_ssl_client_handshaker_factory*>(factory);
1374 if (client_factory->session_cache != nullptr) {
1375 tsi_ssl_handshaker_resume_session(ssl,
1376 client_factory->session_cache.get());
1378 ssl_result = SSL_do_handshake(ssl);
1379 ssl_result = SSL_get_error(ssl, ssl_result);
1380 if (ssl_result != SSL_ERROR_WANT_READ) {
1382 "Unexpected error received from first SSL_do_handshake call: %s",
1383 ssl_error_string(ssl_result));
1385 BIO_free(network_io);
1386 return TSI_INTERNAL_ERROR;
1389 SSL_set_accept_state(ssl);
1392 impl = static_cast<tsi_ssl_handshaker*>(gpr_zalloc(sizeof(*impl)));
1394 impl->network_io = network_io;
1395 impl->result = TSI_HANDSHAKE_IN_PROGRESS;
1396 impl->outgoing_bytes_buffer_size =
1397 TSI_SSL_HANDSHAKER_OUTGOING_BUFFER_INITIAL_SIZE;
1398 impl->outgoing_bytes_buffer =
1399 static_cast<unsigned char*>(gpr_zalloc(impl->outgoing_bytes_buffer_size));
1400 impl->base.vtable = &handshaker_vtable;
1401 impl->factory_ref = tsi_ssl_handshaker_factory_ref(factory);
1402 *handshaker = &impl->base;
1406 static int select_protocol_list(const unsigned char** out,
1407 unsigned char* outlen,
1408 const unsigned char* client_list,
1409 size_t client_list_len,
1410 const unsigned char* server_list,
1411 size_t server_list_len) {
1412 const unsigned char* client_current = client_list;
1413 while (static_cast<unsigned int>(client_current - client_list) <
1415 unsigned char client_current_len = *(client_current++);
1416 const unsigned char* server_current = server_list;
1417 while ((server_current >= server_list) &&
1418 static_cast<uintptr_t>(server_current - server_list) <
1420 unsigned char server_current_len = *(server_current++);
1421 if ((client_current_len == server_current_len) &&
1422 !memcmp(client_current, server_current, server_current_len)) {
1423 *out = server_current;
1424 *outlen = server_current_len;
1425 return SSL_TLSEXT_ERR_OK;
1427 server_current += server_current_len;
1429 client_current += client_current_len;
1431 return SSL_TLSEXT_ERR_NOACK;
1434 /* --- tsi_ssl_client_handshaker_factory methods implementation. --- */
1436 tsi_result tsi_ssl_client_handshaker_factory_create_handshaker(
1437 tsi_ssl_client_handshaker_factory* self, const char* server_name_indication,
1438 tsi_handshaker** handshaker) {
1439 return create_tsi_ssl_handshaker(self->ssl_context, 1, server_name_indication,
1440 &self->base, handshaker);
1443 void tsi_ssl_client_handshaker_factory_unref(
1444 tsi_ssl_client_handshaker_factory* self) {
1445 if (self == nullptr) return;
1446 tsi_ssl_handshaker_factory_unref(&self->base);
1449 static void tsi_ssl_client_handshaker_factory_destroy(
1450 tsi_ssl_handshaker_factory* factory) {
1451 if (factory == nullptr) return;
1452 tsi_ssl_client_handshaker_factory* self =
1453 reinterpret_cast<tsi_ssl_client_handshaker_factory*>(factory);
1454 if (self->ssl_context != nullptr) SSL_CTX_free(self->ssl_context);
1455 if (self->alpn_protocol_list != nullptr) gpr_free(self->alpn_protocol_list);
1456 self->session_cache.reset();
1460 static int client_handshaker_factory_npn_callback(SSL* ssl, unsigned char** out,
1461 unsigned char* outlen,
1462 const unsigned char* in,
1465 tsi_ssl_client_handshaker_factory* factory =
1466 static_cast<tsi_ssl_client_handshaker_factory*>(arg);
1467 return select_protocol_list((const unsigned char**)out, outlen,
1468 factory->alpn_protocol_list,
1469 factory->alpn_protocol_list_length, in, inlen);
1472 /* --- tsi_ssl_server_handshaker_factory methods implementation. --- */
1474 tsi_result tsi_ssl_server_handshaker_factory_create_handshaker(
1475 tsi_ssl_server_handshaker_factory* self, tsi_handshaker** handshaker) {
1476 if (self->ssl_context_count == 0) return TSI_INVALID_ARGUMENT;
1477 /* Create the handshaker with the first context. We will switch if needed
1478 because of SNI in ssl_server_handshaker_factory_servername_callback. */
1479 return create_tsi_ssl_handshaker(self->ssl_contexts[0], 0, nullptr,
1480 &self->base, handshaker);
1483 void tsi_ssl_server_handshaker_factory_unref(
1484 tsi_ssl_server_handshaker_factory* self) {
1485 if (self == nullptr) return;
1486 tsi_ssl_handshaker_factory_unref(&self->base);
1489 static void tsi_ssl_server_handshaker_factory_destroy(
1490 tsi_ssl_handshaker_factory* factory) {
1491 if (factory == nullptr) return;
1492 tsi_ssl_server_handshaker_factory* self =
1493 reinterpret_cast<tsi_ssl_server_handshaker_factory*>(factory);
1495 for (i = 0; i < self->ssl_context_count; i++) {
1496 if (self->ssl_contexts[i] != nullptr) {
1497 SSL_CTX_free(self->ssl_contexts[i]);
1498 tsi_peer_destruct(&self->ssl_context_x509_subject_names[i]);
1501 if (self->ssl_contexts != nullptr) gpr_free(self->ssl_contexts);
1502 if (self->ssl_context_x509_subject_names != nullptr) {
1503 gpr_free(self->ssl_context_x509_subject_names);
1505 if (self->alpn_protocol_list != nullptr) gpr_free(self->alpn_protocol_list);
1509 static int does_entry_match_name(const char* entry, size_t entry_length,
1512 const char* name_subdomain = nullptr;
1513 size_t name_length = strlen(name);
1514 size_t name_subdomain_length;
1515 if (entry_length == 0) return 0;
1517 /* Take care of '.' terminations. */
1518 if (name[name_length - 1] == '.') {
1521 if (entry[entry_length - 1] == '.') {
1523 if (entry_length == 0) return 0;
1526 if ((name_length == entry_length) &&
1527 strncmp(name, entry, entry_length) == 0) {
1528 return 1; /* Perfect match. */
1530 if (entry[0] != '*') return 0;
1532 /* Wildchar subdomain matching. */
1533 if (entry_length < 3 || entry[1] != '.') { /* At least *.x */
1534 gpr_log(GPR_ERROR, "Invalid wildchar entry.");
1537 name_subdomain = strchr(name, '.');
1538 if (name_subdomain == nullptr) return 0;
1539 name_subdomain_length = strlen(name_subdomain);
1540 if (name_subdomain_length < 2) return 0;
1541 name_subdomain++; /* Starts after the dot. */
1542 name_subdomain_length--;
1543 entry += 2; /* Remove *. */
1545 dot = strchr(name_subdomain, '.');
1546 if ((dot == nullptr) || (dot == &name_subdomain[name_subdomain_length - 1])) {
1547 gpr_log(GPR_ERROR, "Invalid toplevel subdomain: %s", name_subdomain);
1550 if (name_subdomain[name_subdomain_length - 1] == '.') {
1551 name_subdomain_length--;
1553 return ((entry_length > 0) && (name_subdomain_length == entry_length) &&
1554 strncmp(entry, name_subdomain, entry_length) == 0);
1557 static int ssl_server_handshaker_factory_servername_callback(SSL* ssl, int* ap,
1559 tsi_ssl_server_handshaker_factory* impl =
1560 static_cast<tsi_ssl_server_handshaker_factory*>(arg);
1562 const char* servername = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name);
1563 if (servername == nullptr || strlen(servername) == 0) {
1564 return SSL_TLSEXT_ERR_NOACK;
1567 for (i = 0; i < impl->ssl_context_count; i++) {
1568 if (tsi_ssl_peer_matches_name(&impl->ssl_context_x509_subject_names[i],
1570 SSL_set_SSL_CTX(ssl, impl->ssl_contexts[i]);
1571 return SSL_TLSEXT_ERR_OK;
1574 gpr_log(GPR_ERROR, "No match found for server name: %s.", servername);
1575 return SSL_TLSEXT_ERR_ALERT_WARNING;
1578 #if TSI_OPENSSL_ALPN_SUPPORT
1579 static int server_handshaker_factory_alpn_callback(
1580 SSL* ssl, const unsigned char** out, unsigned char* outlen,
1581 const unsigned char* in, unsigned int inlen, void* arg) {
1582 tsi_ssl_server_handshaker_factory* factory =
1583 static_cast<tsi_ssl_server_handshaker_factory*>(arg);
1584 return select_protocol_list(out, outlen, in, inlen,
1585 factory->alpn_protocol_list,
1586 factory->alpn_protocol_list_length);
1588 #endif /* TSI_OPENSSL_ALPN_SUPPORT */
1590 static int server_handshaker_factory_npn_advertised_callback(
1591 SSL* ssl, const unsigned char** out, unsigned int* outlen, void* arg) {
1592 tsi_ssl_server_handshaker_factory* factory =
1593 static_cast<tsi_ssl_server_handshaker_factory*>(arg);
1594 *out = factory->alpn_protocol_list;
1595 GPR_ASSERT(factory->alpn_protocol_list_length <= UINT_MAX);
1596 *outlen = static_cast<unsigned int>(factory->alpn_protocol_list_length);
1597 return SSL_TLSEXT_ERR_OK;
1600 /// This callback is called when new \a session is established and ready to
1601 /// be cached. This session can be reused for new connections to similar
1602 /// servers at later point of time.
1603 /// It's intended to be used with SSL_CTX_sess_set_new_cb function.
1605 /// It returns 1 if callback takes ownership over \a session and 0 otherwise.
1606 static int server_handshaker_factory_new_session_callback(
1607 SSL* ssl, SSL_SESSION* session) {
1608 SSL_CTX* ssl_context = SSL_get_SSL_CTX(ssl);
1609 if (ssl_context == nullptr) {
1612 void* arg = SSL_CTX_get_ex_data(ssl_context, g_ssl_ctx_ex_factory_index);
1613 tsi_ssl_client_handshaker_factory* factory =
1614 static_cast<tsi_ssl_client_handshaker_factory*>(arg);
1615 const char* server_name = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name);
1616 if (server_name == nullptr) {
1619 factory->session_cache->Put(server_name, tsi::SslSessionPtr(session));
1620 // Return 1 to indicate transfered ownership over the given session.
1624 /* --- tsi_ssl_handshaker_factory constructors. --- */
1626 static tsi_ssl_handshaker_factory_vtable client_handshaker_factory_vtable = {
1627 tsi_ssl_client_handshaker_factory_destroy};
1629 tsi_result tsi_create_ssl_client_handshaker_factory(
1630 const tsi_ssl_pem_key_cert_pair* pem_key_cert_pair,
1631 const char* pem_root_certs, const char* cipher_suites,
1632 const char** alpn_protocols, uint16_t num_alpn_protocols,
1633 tsi_ssl_client_handshaker_factory** factory) {
1634 tsi_ssl_client_handshaker_options options;
1635 options.pem_key_cert_pair = pem_key_cert_pair;
1636 options.pem_root_certs = pem_root_certs;
1637 options.cipher_suites = cipher_suites;
1638 options.alpn_protocols = alpn_protocols;
1639 options.num_alpn_protocols = num_alpn_protocols;
1640 return tsi_create_ssl_client_handshaker_factory_with_options(&options,
1644 tsi_result tsi_create_ssl_client_handshaker_factory_with_options(
1645 const tsi_ssl_client_handshaker_options* options,
1646 tsi_ssl_client_handshaker_factory** factory) {
1647 SSL_CTX* ssl_context = nullptr;
1648 tsi_ssl_client_handshaker_factory* impl = nullptr;
1649 tsi_result result = TSI_OK;
1651 gpr_once_init(&g_init_openssl_once, init_openssl);
1653 if (factory == nullptr) return TSI_INVALID_ARGUMENT;
1655 if (options->pem_root_certs == nullptr && options->root_store == nullptr) {
1656 return TSI_INVALID_ARGUMENT;
1659 #if defined(OPENSSL_NO_TLS1_2_METHOD) || OPENSSL_API_COMPAT >= 0x10100000L
1660 ssl_context = SSL_CTX_new(TLS_method());
1662 ssl_context = SSL_CTX_new(TLSv1_2_method());
1664 if (ssl_context == nullptr) {
1665 gpr_log(GPR_ERROR, "Could not create ssl context.");
1666 return TSI_INVALID_ARGUMENT;
1669 impl = static_cast<tsi_ssl_client_handshaker_factory*>(
1670 gpr_zalloc(sizeof(*impl)));
1671 tsi_ssl_handshaker_factory_init(&impl->base);
1672 impl->base.vtable = &client_handshaker_factory_vtable;
1673 impl->ssl_context = ssl_context;
1674 if (options->session_cache != nullptr) {
1675 // Unref is called manually on factory destruction.
1676 impl->session_cache =
1677 reinterpret_cast<tsi::SslSessionLRUCache*>(options->session_cache)
1679 SSL_CTX_set_ex_data(ssl_context, g_ssl_ctx_ex_factory_index, impl);
1680 SSL_CTX_sess_set_new_cb(ssl_context,
1681 server_handshaker_factory_new_session_callback);
1682 SSL_CTX_set_session_cache_mode(ssl_context, SSL_SESS_CACHE_CLIENT);
1686 result = populate_ssl_context(ssl_context, options->pem_key_cert_pair,
1687 options->cipher_suites);
1688 if (result != TSI_OK) break;
1690 #if OPENSSL_VERSION_NUMBER >= 0x10100000
1691 // X509_STORE_up_ref is only available since OpenSSL 1.1.
1692 if (options->root_store != nullptr) {
1693 X509_STORE_up_ref(options->root_store->store);
1694 SSL_CTX_set_cert_store(ssl_context, options->root_store->store);
1697 if (OPENSSL_VERSION_NUMBER < 0x10100000 || options->root_store == nullptr) {
1698 result = ssl_ctx_load_verification_certs(
1699 ssl_context, options->pem_root_certs, strlen(options->pem_root_certs),
1701 if (result != TSI_OK) {
1702 gpr_log(GPR_ERROR, "Cannot load server root certificates.");
1707 if (options->num_alpn_protocols != 0) {
1708 result = build_alpn_protocol_name_list(
1709 options->alpn_protocols, options->num_alpn_protocols,
1710 &impl->alpn_protocol_list, &impl->alpn_protocol_list_length);
1711 if (result != TSI_OK) {
1712 gpr_log(GPR_ERROR, "Building alpn list failed with error %s.",
1713 tsi_result_to_string(result));
1716 #if TSI_OPENSSL_ALPN_SUPPORT
1717 GPR_ASSERT(impl->alpn_protocol_list_length < UINT_MAX);
1718 if (SSL_CTX_set_alpn_protos(
1719 ssl_context, impl->alpn_protocol_list,
1720 static_cast<unsigned int>(impl->alpn_protocol_list_length))) {
1721 gpr_log(GPR_ERROR, "Could not set alpn protocol list to context.");
1722 result = TSI_INVALID_ARGUMENT;
1725 #endif /* TSI_OPENSSL_ALPN_SUPPORT */
1726 SSL_CTX_set_next_proto_select_cb(
1727 ssl_context, client_handshaker_factory_npn_callback, impl);
1730 if (result != TSI_OK) {
1731 tsi_ssl_handshaker_factory_unref(&impl->base);
1734 SSL_CTX_set_verify(ssl_context, SSL_VERIFY_PEER, nullptr);
1735 /* TODO(jboeuf): Add revocation verification. */
1741 static tsi_ssl_handshaker_factory_vtable server_handshaker_factory_vtable = {
1742 tsi_ssl_server_handshaker_factory_destroy};
1744 tsi_result tsi_create_ssl_server_handshaker_factory(
1745 const tsi_ssl_pem_key_cert_pair* pem_key_cert_pairs,
1746 size_t num_key_cert_pairs, const char* pem_client_root_certs,
1747 int force_client_auth, const char* cipher_suites,
1748 const char** alpn_protocols, uint16_t num_alpn_protocols,
1749 tsi_ssl_server_handshaker_factory** factory) {
1750 return tsi_create_ssl_server_handshaker_factory_ex(
1751 pem_key_cert_pairs, num_key_cert_pairs, pem_client_root_certs,
1752 force_client_auth ? TSI_REQUEST_AND_REQUIRE_CLIENT_CERTIFICATE_AND_VERIFY
1753 : TSI_DONT_REQUEST_CLIENT_CERTIFICATE,
1754 cipher_suites, alpn_protocols, num_alpn_protocols, factory);
1757 tsi_result tsi_create_ssl_server_handshaker_factory_ex(
1758 const tsi_ssl_pem_key_cert_pair* pem_key_cert_pairs,
1759 size_t num_key_cert_pairs, const char* pem_client_root_certs,
1760 tsi_client_certificate_request_type client_certificate_request,
1761 const char* cipher_suites, const char** alpn_protocols,
1762 uint16_t num_alpn_protocols, tsi_ssl_server_handshaker_factory** factory) {
1763 tsi_ssl_server_handshaker_options options;
1764 options.pem_key_cert_pairs = pem_key_cert_pairs;
1765 options.num_key_cert_pairs = num_key_cert_pairs;
1766 options.pem_client_root_certs = pem_client_root_certs;
1767 options.client_certificate_request = client_certificate_request;
1768 options.cipher_suites = cipher_suites;
1769 options.alpn_protocols = alpn_protocols;
1770 options.num_alpn_protocols = num_alpn_protocols;
1771 return tsi_create_ssl_server_handshaker_factory_with_options(&options,
1775 tsi_result tsi_create_ssl_server_handshaker_factory_with_options(
1776 const tsi_ssl_server_handshaker_options* options,
1777 tsi_ssl_server_handshaker_factory** factory) {
1778 tsi_ssl_server_handshaker_factory* impl = nullptr;
1779 tsi_result result = TSI_OK;
1782 gpr_once_init(&g_init_openssl_once, init_openssl);
1784 if (factory == nullptr) return TSI_INVALID_ARGUMENT;
1786 if (options->num_key_cert_pairs == 0 ||
1787 options->pem_key_cert_pairs == nullptr) {
1788 return TSI_INVALID_ARGUMENT;
1791 impl = static_cast<tsi_ssl_server_handshaker_factory*>(
1792 gpr_zalloc(sizeof(*impl)));
1793 tsi_ssl_handshaker_factory_init(&impl->base);
1794 impl->base.vtable = &server_handshaker_factory_vtable;
1796 impl->ssl_contexts = static_cast<SSL_CTX**>(
1797 gpr_zalloc(options->num_key_cert_pairs * sizeof(SSL_CTX*)));
1798 impl->ssl_context_x509_subject_names = static_cast<tsi_peer*>(
1799 gpr_zalloc(options->num_key_cert_pairs * sizeof(tsi_peer)));
1800 if (impl->ssl_contexts == nullptr ||
1801 impl->ssl_context_x509_subject_names == nullptr) {
1802 tsi_ssl_handshaker_factory_unref(&impl->base);
1803 return TSI_OUT_OF_RESOURCES;
1805 impl->ssl_context_count = options->num_key_cert_pairs;
1807 if (options->num_alpn_protocols > 0) {
1808 result = build_alpn_protocol_name_list(
1809 options->alpn_protocols, options->num_alpn_protocols,
1810 &impl->alpn_protocol_list, &impl->alpn_protocol_list_length);
1811 if (result != TSI_OK) {
1812 tsi_ssl_handshaker_factory_unref(&impl->base);
1817 for (i = 0; i < options->num_key_cert_pairs; i++) {
1819 #if defined(OPENSSL_NO_TLS1_2_METHOD) || OPENSSL_API_COMPAT >= 0x10100000L
1820 impl->ssl_contexts[i] = SSL_CTX_new(TLS_method());
1822 impl->ssl_contexts[i] = SSL_CTX_new(TLSv1_2_method());
1824 if (impl->ssl_contexts[i] == nullptr) {
1825 gpr_log(GPR_ERROR, "Could not create ssl context.");
1826 result = TSI_OUT_OF_RESOURCES;
1829 result = populate_ssl_context(impl->ssl_contexts[i],
1830 &options->pem_key_cert_pairs[i],
1831 options->cipher_suites);
1832 if (result != TSI_OK) break;
1834 // TODO(elessar): Provide ability to disable session ticket keys.
1836 // Allow client cache sessions (it's needed for OpenSSL only).
1837 int set_sid_ctx_result = SSL_CTX_set_session_id_context(
1838 impl->ssl_contexts[i], kSslSessionIdContext,
1839 GPR_ARRAY_SIZE(kSslSessionIdContext));
1840 if (set_sid_ctx_result == 0) {
1841 gpr_log(GPR_ERROR, "Failed to set session id context.");
1842 result = TSI_INTERNAL_ERROR;
1846 if (options->session_ticket_key != nullptr) {
1847 if (SSL_CTX_set_tlsext_ticket_keys(
1848 impl->ssl_contexts[i],
1849 const_cast<char*>(options->session_ticket_key),
1850 options->session_ticket_key_size) == 0) {
1851 gpr_log(GPR_ERROR, "Invalid STEK size.");
1852 result = TSI_INVALID_ARGUMENT;
1857 if (options->pem_client_root_certs != nullptr) {
1858 STACK_OF(X509_NAME)* root_names = nullptr;
1859 result = ssl_ctx_load_verification_certs(
1860 impl->ssl_contexts[i], options->pem_client_root_certs,
1861 strlen(options->pem_client_root_certs), &root_names);
1862 if (result != TSI_OK) {
1863 gpr_log(GPR_ERROR, "Invalid verification certs.");
1866 SSL_CTX_set_client_CA_list(impl->ssl_contexts[i], root_names);
1868 switch (options->client_certificate_request) {
1869 case TSI_DONT_REQUEST_CLIENT_CERTIFICATE:
1870 SSL_CTX_set_verify(impl->ssl_contexts[i], SSL_VERIFY_NONE, nullptr);
1872 case TSI_REQUEST_CLIENT_CERTIFICATE_BUT_DONT_VERIFY:
1873 SSL_CTX_set_verify(impl->ssl_contexts[i], SSL_VERIFY_PEER,
1874 NullVerifyCallback);
1876 case TSI_REQUEST_CLIENT_CERTIFICATE_AND_VERIFY:
1877 SSL_CTX_set_verify(impl->ssl_contexts[i], SSL_VERIFY_PEER, nullptr);
1879 case TSI_REQUEST_AND_REQUIRE_CLIENT_CERTIFICATE_BUT_DONT_VERIFY:
1880 SSL_CTX_set_verify(impl->ssl_contexts[i],
1881 SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT,
1882 NullVerifyCallback);
1884 case TSI_REQUEST_AND_REQUIRE_CLIENT_CERTIFICATE_AND_VERIFY:
1885 SSL_CTX_set_verify(impl->ssl_contexts[i],
1886 SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT,
1890 /* TODO(jboeuf): Add revocation verification. */
1892 result = extract_x509_subject_names_from_pem_cert(
1893 options->pem_key_cert_pairs[i].cert_chain,
1894 &impl->ssl_context_x509_subject_names[i]);
1895 if (result != TSI_OK) break;
1897 SSL_CTX_set_tlsext_servername_callback(
1898 impl->ssl_contexts[i],
1899 ssl_server_handshaker_factory_servername_callback);
1900 SSL_CTX_set_tlsext_servername_arg(impl->ssl_contexts[i], impl);
1901 #if TSI_OPENSSL_ALPN_SUPPORT
1902 SSL_CTX_set_alpn_select_cb(impl->ssl_contexts[i],
1903 server_handshaker_factory_alpn_callback, impl);
1904 #endif /* TSI_OPENSSL_ALPN_SUPPORT */
1905 SSL_CTX_set_next_protos_advertised_cb(
1906 impl->ssl_contexts[i],
1907 server_handshaker_factory_npn_advertised_callback, impl);
1910 if (result != TSI_OK) {
1911 tsi_ssl_handshaker_factory_unref(&impl->base);
1920 /* --- tsi_ssl utils. --- */
1922 int tsi_ssl_peer_matches_name(const tsi_peer* peer, const char* name) {
1924 size_t san_count = 0;
1925 const tsi_peer_property* cn_property = nullptr;
1926 int like_ip = looks_like_ip_address(name);
1928 /* Check the SAN first. */
1929 for (i = 0; i < peer->property_count; i++) {
1930 const tsi_peer_property* property = &peer->properties[i];
1931 if (property->name == nullptr) continue;
1932 if (strcmp(property->name,
1933 TSI_X509_SUBJECT_ALTERNATIVE_NAME_PEER_PROPERTY) == 0) {
1936 if (!like_ip && does_entry_match_name(property->value.data,
1937 property->value.length, name)) {
1939 } else if (like_ip &&
1940 strncmp(name, property->value.data, property->value.length) ==
1942 strlen(name) == property->value.length) {
1943 /* IP Addresses are exact matches only. */
1946 } else if (strcmp(property->name,
1947 TSI_X509_SUBJECT_COMMON_NAME_PEER_PROPERTY) == 0) {
1948 cn_property = property;
1952 /* If there's no SAN, try the CN, but only if its not like an IP Address */
1953 if (san_count == 0 && cn_property != nullptr && !like_ip) {
1954 if (does_entry_match_name(cn_property->value.data,
1955 cn_property->value.length, name)) {
1960 return 0; /* Not found. */
1963 /* --- Testing support. --- */
1964 const tsi_ssl_handshaker_factory_vtable* tsi_ssl_handshaker_factory_swap_vtable(
1965 tsi_ssl_handshaker_factory* factory,
1966 tsi_ssl_handshaker_factory_vtable* new_vtable) {
1967 GPR_ASSERT(factory != nullptr);
1968 GPR_ASSERT(factory->vtable != nullptr);
1970 const tsi_ssl_handshaker_factory_vtable* orig_vtable = factory->vtable;
1971 factory->vtable = new_vtable;