1 /*
2 *
3 * Copyright 2018 gRPC authors.
4 *
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
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
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.
16 *
17 */
18
19 #include <grpc/support/port_platform.h>
20
21 #include "src/core/tsi/alts/handshaker/alts_tsi_handshaker.h"
22
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <string.h>
26
27 #include <grpc/support/alloc.h>
28 #include <grpc/support/log.h>
29 #include <grpc/support/sync.h>
30 #include <grpc/support/thd_id.h>
31
32 #include "src/core/lib/gpr/host_port.h"
33 #include "src/core/lib/gprpp/thd.h"
34 #include "src/core/lib/slice/slice_internal.h"
35 #include "src/core/tsi/alts/frame_protector/alts_frame_protector.h"
36 #include "src/core/tsi/alts/handshaker/alts_handshaker_client.h"
37 #include "src/core/tsi/alts/handshaker/alts_tsi_utils.h"
38 #include "src/core/tsi/alts/zero_copy_frame_protector/alts_zero_copy_grpc_protector.h"
39 #include "src/core/tsi/alts_transport_security.h"
40
41 #define TSI_ALTS_INITIAL_BUFFER_SIZE 256
42
43 static alts_shared_resource* kSharedResource = alts_get_shared_resource();
44
45 /* Main struct for ALTS TSI handshaker. */
46 typedef struct alts_tsi_handshaker {
47 tsi_handshaker base;
48 alts_handshaker_client* client;
49 grpc_slice recv_bytes;
50 grpc_slice target_name;
51 unsigned char* buffer;
52 size_t buffer_size;
53 bool is_client;
54 bool has_sent_start_message;
55 grpc_alts_credentials_options* options;
56 } alts_tsi_handshaker;
57
58 /* Main struct for ALTS TSI handshaker result. */
59 typedef struct alts_tsi_handshaker_result {
60 tsi_handshaker_result base;
61 char* peer_identity;
62 char* key_data;
63 unsigned char* unused_bytes;
64 size_t unused_bytes_size;
65 grpc_slice rpc_versions;
66 bool is_client;
67 } alts_tsi_handshaker_result;
68
handshaker_result_extract_peer(const tsi_handshaker_result * self,tsi_peer * peer)69 static tsi_result handshaker_result_extract_peer(
70 const tsi_handshaker_result* self, tsi_peer* peer) {
71 if (self == nullptr || peer == nullptr) {
72 gpr_log(GPR_ERROR, "Invalid argument to handshaker_result_extract_peer()");
73 return TSI_INVALID_ARGUMENT;
74 }
75 alts_tsi_handshaker_result* result =
76 reinterpret_cast<alts_tsi_handshaker_result*>(
77 const_cast<tsi_handshaker_result*>(self));
78 GPR_ASSERT(kTsiAltsNumOfPeerProperties == 3);
79 tsi_result ok = tsi_construct_peer(kTsiAltsNumOfPeerProperties, peer);
80 int index = 0;
81 if (ok != TSI_OK) {
82 gpr_log(GPR_ERROR, "Failed to construct tsi peer");
83 return ok;
84 }
85 GPR_ASSERT(&peer->properties[index] != nullptr);
86 ok = tsi_construct_string_peer_property_from_cstring(
87 TSI_CERTIFICATE_TYPE_PEER_PROPERTY, TSI_ALTS_CERTIFICATE_TYPE,
88 &peer->properties[index]);
89 if (ok != TSI_OK) {
90 tsi_peer_destruct(peer);
91 gpr_log(GPR_ERROR, "Failed to set tsi peer property");
92 return ok;
93 }
94 index++;
95 GPR_ASSERT(&peer->properties[index] != nullptr);
96 ok = tsi_construct_string_peer_property_from_cstring(
97 TSI_ALTS_SERVICE_ACCOUNT_PEER_PROPERTY, result->peer_identity,
98 &peer->properties[index]);
99 if (ok != TSI_OK) {
100 tsi_peer_destruct(peer);
101 gpr_log(GPR_ERROR, "Failed to set tsi peer property");
102 }
103 index++;
104 GPR_ASSERT(&peer->properties[index] != nullptr);
105 ok = tsi_construct_string_peer_property(
106 TSI_ALTS_RPC_VERSIONS,
107 reinterpret_cast<char*>(GRPC_SLICE_START_PTR(result->rpc_versions)),
108 GRPC_SLICE_LENGTH(result->rpc_versions), &peer->properties[2]);
109 if (ok != TSI_OK) {
110 tsi_peer_destruct(peer);
111 gpr_log(GPR_ERROR, "Failed to set tsi peer property");
112 }
113 GPR_ASSERT(++index == kTsiAltsNumOfPeerProperties);
114 return ok;
115 }
116
handshaker_result_create_zero_copy_grpc_protector(const tsi_handshaker_result * self,size_t * max_output_protected_frame_size,tsi_zero_copy_grpc_protector ** protector)117 static tsi_result handshaker_result_create_zero_copy_grpc_protector(
118 const tsi_handshaker_result* self, size_t* max_output_protected_frame_size,
119 tsi_zero_copy_grpc_protector** protector) {
120 if (self == nullptr || protector == nullptr) {
121 gpr_log(GPR_ERROR,
122 "Invalid arguments to create_zero_copy_grpc_protector()");
123 return TSI_INVALID_ARGUMENT;
124 }
125 alts_tsi_handshaker_result* result =
126 reinterpret_cast<alts_tsi_handshaker_result*>(
127 const_cast<tsi_handshaker_result*>(self));
128 tsi_result ok = alts_zero_copy_grpc_protector_create(
129 reinterpret_cast<const uint8_t*>(result->key_data),
130 kAltsAes128GcmRekeyKeyLength, /*is_rekey=*/true, result->is_client,
131 /*is_integrity_only=*/false, /*enable_extra_copy=*/false,
132 max_output_protected_frame_size, protector);
133 if (ok != TSI_OK) {
134 gpr_log(GPR_ERROR, "Failed to create zero-copy grpc protector");
135 }
136 return ok;
137 }
138
handshaker_result_create_frame_protector(const tsi_handshaker_result * self,size_t * max_output_protected_frame_size,tsi_frame_protector ** protector)139 static tsi_result handshaker_result_create_frame_protector(
140 const tsi_handshaker_result* self, size_t* max_output_protected_frame_size,
141 tsi_frame_protector** protector) {
142 if (self == nullptr || protector == nullptr) {
143 gpr_log(GPR_ERROR,
144 "Invalid arguments to handshaker_result_create_frame_protector()");
145 return TSI_INVALID_ARGUMENT;
146 }
147 alts_tsi_handshaker_result* result =
148 reinterpret_cast<alts_tsi_handshaker_result*>(
149 const_cast<tsi_handshaker_result*>(self));
150 tsi_result ok = alts_create_frame_protector(
151 reinterpret_cast<const uint8_t*>(result->key_data),
152 kAltsAes128GcmRekeyKeyLength, result->is_client, /*is_rekey=*/true,
153 max_output_protected_frame_size, protector);
154 if (ok != TSI_OK) {
155 gpr_log(GPR_ERROR, "Failed to create frame protector");
156 }
157 return ok;
158 }
159
handshaker_result_get_unused_bytes(const tsi_handshaker_result * self,const unsigned char ** bytes,size_t * bytes_size)160 static tsi_result handshaker_result_get_unused_bytes(
161 const tsi_handshaker_result* self, const unsigned char** bytes,
162 size_t* bytes_size) {
163 if (self == nullptr || bytes == nullptr || bytes_size == nullptr) {
164 gpr_log(GPR_ERROR,
165 "Invalid arguments to handshaker_result_get_unused_bytes()");
166 return TSI_INVALID_ARGUMENT;
167 }
168 alts_tsi_handshaker_result* result =
169 reinterpret_cast<alts_tsi_handshaker_result*>(
170 const_cast<tsi_handshaker_result*>(self));
171 *bytes = result->unused_bytes;
172 *bytes_size = result->unused_bytes_size;
173 return TSI_OK;
174 }
175
handshaker_result_destroy(tsi_handshaker_result * self)176 static void handshaker_result_destroy(tsi_handshaker_result* self) {
177 if (self == nullptr) {
178 return;
179 }
180 alts_tsi_handshaker_result* result =
181 reinterpret_cast<alts_tsi_handshaker_result*>(
182 const_cast<tsi_handshaker_result*>(self));
183 gpr_free(result->peer_identity);
184 gpr_free(result->key_data);
185 gpr_free(result->unused_bytes);
186 grpc_slice_unref_internal(result->rpc_versions);
187 gpr_free(result);
188 }
189
190 static const tsi_handshaker_result_vtable result_vtable = {
191 handshaker_result_extract_peer,
192 handshaker_result_create_zero_copy_grpc_protector,
193 handshaker_result_create_frame_protector,
194 handshaker_result_get_unused_bytes, handshaker_result_destroy};
195
create_handshaker_result(grpc_gcp_handshaker_resp * resp,bool is_client,tsi_handshaker_result ** self)196 static tsi_result create_handshaker_result(grpc_gcp_handshaker_resp* resp,
197 bool is_client,
198 tsi_handshaker_result** self) {
199 if (self == nullptr || resp == nullptr) {
200 gpr_log(GPR_ERROR, "Invalid arguments to create_handshaker_result()");
201 return TSI_INVALID_ARGUMENT;
202 }
203 grpc_slice* key = static_cast<grpc_slice*>(resp->result.key_data.arg);
204 GPR_ASSERT(key != nullptr);
205 grpc_slice* identity =
206 static_cast<grpc_slice*>(resp->result.peer_identity.service_account.arg);
207 if (identity == nullptr) {
208 gpr_log(GPR_ERROR, "Invalid service account");
209 return TSI_FAILED_PRECONDITION;
210 }
211 if (GRPC_SLICE_LENGTH(*key) < kAltsAes128GcmRekeyKeyLength) {
212 gpr_log(GPR_ERROR, "Bad key length");
213 return TSI_FAILED_PRECONDITION;
214 }
215 alts_tsi_handshaker_result* result =
216 static_cast<alts_tsi_handshaker_result*>(gpr_zalloc(sizeof(*result)));
217 result->key_data =
218 static_cast<char*>(gpr_zalloc(kAltsAes128GcmRekeyKeyLength));
219 memcpy(result->key_data, GRPC_SLICE_START_PTR(*key),
220 kAltsAes128GcmRekeyKeyLength);
221 result->peer_identity = grpc_slice_to_c_string(*identity);
222 if (!resp->result.has_peer_rpc_versions) {
223 gpr_log(GPR_ERROR, "Peer does not set RPC protocol versions.");
224 return TSI_FAILED_PRECONDITION;
225 }
226 if (!grpc_gcp_rpc_protocol_versions_encode(&resp->result.peer_rpc_versions,
227 &result->rpc_versions)) {
228 gpr_log(GPR_ERROR, "Failed to serialize peer's RPC protocol versions.");
229 return TSI_FAILED_PRECONDITION;
230 }
231 result->is_client = is_client;
232 result->base.vtable = &result_vtable;
233 *self = &result->base;
234 return TSI_OK;
235 }
236
handshaker_next(tsi_handshaker * self,const unsigned char * received_bytes,size_t received_bytes_size,const unsigned char ** bytes_to_send,size_t * bytes_to_send_size,tsi_handshaker_result ** result,tsi_handshaker_on_next_done_cb cb,void * user_data)237 static tsi_result handshaker_next(
238 tsi_handshaker* self, const unsigned char* received_bytes,
239 size_t received_bytes_size, const unsigned char** bytes_to_send,
240 size_t* bytes_to_send_size, tsi_handshaker_result** result,
241 tsi_handshaker_on_next_done_cb cb, void* user_data) {
242 if (self == nullptr || cb == nullptr) {
243 gpr_log(GPR_ERROR, "Invalid arguments to handshaker_next()");
244 return TSI_INVALID_ARGUMENT;
245 }
246 if (self->handshake_shutdown) {
247 gpr_log(GPR_ERROR, "TSI handshake shutdown");
248 return TSI_HANDSHAKE_SHUTDOWN;
249 }
250 alts_tsi_handshaker* handshaker =
251 reinterpret_cast<alts_tsi_handshaker*>(self);
252 tsi_result ok = TSI_OK;
253 alts_tsi_event* event = nullptr;
254 ok = alts_tsi_event_create(handshaker, cb, user_data, handshaker->options,
255 handshaker->target_name, &event);
256 if (ok != TSI_OK) {
257 gpr_log(GPR_ERROR, "Failed to create ALTS TSI event");
258 return ok;
259 }
260 grpc_slice slice = (received_bytes == nullptr || received_bytes_size == 0)
261 ? grpc_empty_slice()
262 : grpc_slice_from_copied_buffer(
263 reinterpret_cast<const char*>(received_bytes),
264 received_bytes_size);
265 if (!handshaker->has_sent_start_message) {
266 ok = handshaker->is_client
267 ? alts_handshaker_client_start_client(handshaker->client, event)
268 : alts_handshaker_client_start_server(handshaker->client, event,
269 &slice);
270 handshaker->has_sent_start_message = true;
271 } else {
272 if (!GRPC_SLICE_IS_EMPTY(handshaker->recv_bytes)) {
273 grpc_slice_unref_internal(handshaker->recv_bytes);
274 }
275 handshaker->recv_bytes = grpc_slice_ref(slice);
276 ok = alts_handshaker_client_next(handshaker->client, event, &slice);
277 }
278 grpc_slice_unref_internal(slice);
279 if (ok != TSI_OK) {
280 gpr_log(GPR_ERROR, "Failed to schedule ALTS handshaker requests");
281 return ok;
282 }
283 return TSI_ASYNC;
284 }
285
handshaker_shutdown(tsi_handshaker * self)286 static void handshaker_shutdown(tsi_handshaker* self) {
287 GPR_ASSERT(self != nullptr);
288 if (self->handshake_shutdown) {
289 return;
290 }
291 alts_tsi_handshaker* handshaker =
292 reinterpret_cast<alts_tsi_handshaker*>(self);
293 alts_handshaker_client_shutdown(handshaker->client);
294 }
295
handshaker_destroy(tsi_handshaker * self)296 static void handshaker_destroy(tsi_handshaker* self) {
297 if (self == nullptr) {
298 return;
299 }
300 alts_tsi_handshaker* handshaker =
301 reinterpret_cast<alts_tsi_handshaker*>(self);
302 alts_handshaker_client_destroy(handshaker->client);
303 grpc_slice_unref_internal(handshaker->recv_bytes);
304 grpc_slice_unref_internal(handshaker->target_name);
305 grpc_alts_credentials_options_destroy(handshaker->options);
306 gpr_free(handshaker->buffer);
307 gpr_free(handshaker);
308 }
309
310 static const tsi_handshaker_vtable handshaker_vtable = {
311 nullptr, nullptr,
312 nullptr, nullptr,
313 nullptr, handshaker_destroy,
314 handshaker_next, handshaker_shutdown};
315
thread_worker(void * arg)316 static void thread_worker(void* arg) {
317 while (true) {
318 grpc_event event = grpc_completion_queue_next(
319 kSharedResource->cq, gpr_inf_future(GPR_CLOCK_REALTIME), nullptr);
320 GPR_ASSERT(event.type != GRPC_QUEUE_TIMEOUT);
321 if (event.type == GRPC_QUEUE_SHUTDOWN) {
322 /* signal alts_tsi_shutdown() to destroy completion queue. */
323 grpc_tsi_alts_signal_for_cq_destroy();
324 break;
325 }
326 /* event.type == GRPC_OP_COMPLETE. */
327 alts_tsi_event* alts_event = static_cast<alts_tsi_event*>(event.tag);
328 alts_tsi_event_dispatch_to_handshaker(alts_event, event.success);
329 alts_tsi_event_destroy(alts_event);
330 }
331 }
332
init_shared_resources(const char * handshaker_service_url)333 static void init_shared_resources(const char* handshaker_service_url) {
334 GPR_ASSERT(handshaker_service_url != nullptr);
335 gpr_mu_lock(&kSharedResource->mu);
336 if (kSharedResource->channel == nullptr) {
337 gpr_cv_init(&kSharedResource->cv);
338 kSharedResource->channel =
339 grpc_insecure_channel_create(handshaker_service_url, nullptr, nullptr);
340 kSharedResource->cq = grpc_completion_queue_create_for_next(nullptr);
341 kSharedResource->thread =
342 grpc_core::Thread("alts_tsi_handshaker", &thread_worker, nullptr);
343 kSharedResource->thread.Start();
344 }
345 gpr_mu_unlock(&kSharedResource->mu);
346 }
347
alts_tsi_handshaker_create(const grpc_alts_credentials_options * options,const char * target_name,const char * handshaker_service_url,bool is_client,tsi_handshaker ** self)348 tsi_result alts_tsi_handshaker_create(
349 const grpc_alts_credentials_options* options, const char* target_name,
350 const char* handshaker_service_url, bool is_client, tsi_handshaker** self) {
351 if (handshaker_service_url == nullptr || self == nullptr ||
352 options == nullptr || (is_client && target_name == nullptr)) {
353 gpr_log(GPR_ERROR, "Invalid arguments to alts_tsi_handshaker_create()");
354 return TSI_INVALID_ARGUMENT;
355 }
356 init_shared_resources(handshaker_service_url);
357 alts_handshaker_client* client = alts_grpc_handshaker_client_create(
358 kSharedResource->channel, kSharedResource->cq, handshaker_service_url);
359 if (client == nullptr) {
360 gpr_log(GPR_ERROR, "Failed to create ALTS handshaker client");
361 return TSI_FAILED_PRECONDITION;
362 }
363 alts_tsi_handshaker* handshaker =
364 static_cast<alts_tsi_handshaker*>(gpr_zalloc(sizeof(*handshaker)));
365 handshaker->client = client;
366 handshaker->buffer_size = TSI_ALTS_INITIAL_BUFFER_SIZE;
367 handshaker->buffer =
368 static_cast<unsigned char*>(gpr_zalloc(handshaker->buffer_size));
369 handshaker->is_client = is_client;
370 handshaker->has_sent_start_message = false;
371 handshaker->target_name = target_name == nullptr
372 ? grpc_empty_slice()
373 : grpc_slice_from_static_string(target_name);
374 handshaker->options = grpc_alts_credentials_options_copy(options);
375 handshaker->base.vtable = &handshaker_vtable;
376 *self = &handshaker->base;
377 return TSI_OK;
378 }
379
is_handshake_finished_properly(grpc_gcp_handshaker_resp * resp)380 static bool is_handshake_finished_properly(grpc_gcp_handshaker_resp* resp) {
381 GPR_ASSERT(resp != nullptr);
382 if (resp->has_result) {
383 return true;
384 }
385 return false;
386 }
387
set_unused_bytes(tsi_handshaker_result * self,grpc_slice * recv_bytes,size_t bytes_consumed)388 static void set_unused_bytes(tsi_handshaker_result* self,
389 grpc_slice* recv_bytes, size_t bytes_consumed) {
390 GPR_ASSERT(recv_bytes != nullptr && self != nullptr);
391 if (GRPC_SLICE_LENGTH(*recv_bytes) == bytes_consumed) {
392 return;
393 }
394 alts_tsi_handshaker_result* result =
395 reinterpret_cast<alts_tsi_handshaker_result*>(self);
396 result->unused_bytes_size = GRPC_SLICE_LENGTH(*recv_bytes) - bytes_consumed;
397 result->unused_bytes =
398 static_cast<unsigned char*>(gpr_zalloc(result->unused_bytes_size));
399 memcpy(result->unused_bytes,
400 GRPC_SLICE_START_PTR(*recv_bytes) + bytes_consumed,
401 result->unused_bytes_size);
402 }
403
alts_tsi_handshaker_handle_response(alts_tsi_handshaker * handshaker,grpc_byte_buffer * recv_buffer,grpc_status_code status,grpc_slice * details,tsi_handshaker_on_next_done_cb cb,void * user_data,bool is_ok)404 void alts_tsi_handshaker_handle_response(alts_tsi_handshaker* handshaker,
405 grpc_byte_buffer* recv_buffer,
406 grpc_status_code status,
407 grpc_slice* details,
408 tsi_handshaker_on_next_done_cb cb,
409 void* user_data, bool is_ok) {
410 /* Invalid input check. */
411 if (cb == nullptr) {
412 gpr_log(GPR_ERROR,
413 "cb is nullptr in alts_tsi_handshaker_handle_response()");
414 return;
415 }
416 if (handshaker == nullptr || recv_buffer == nullptr) {
417 gpr_log(GPR_ERROR,
418 "Invalid arguments to alts_tsi_handshaker_handle_response()");
419 cb(TSI_INTERNAL_ERROR, user_data, nullptr, 0, nullptr);
420 return;
421 }
422 if (handshaker->base.handshake_shutdown) {
423 gpr_log(GPR_ERROR, "TSI handshake shutdown");
424 cb(TSI_HANDSHAKE_SHUTDOWN, user_data, nullptr, 0, nullptr);
425 return;
426 }
427 /* Failed grpc call check. */
428 if (!is_ok || status != GRPC_STATUS_OK) {
429 gpr_log(GPR_ERROR, "grpc call made to handshaker service failed");
430 if (details != nullptr) {
431 char* error_details = grpc_slice_to_c_string(*details);
432 gpr_log(GPR_ERROR, "error details:%s", error_details);
433 gpr_free(error_details);
434 }
435 cb(TSI_INTERNAL_ERROR, user_data, nullptr, 0, nullptr);
436 return;
437 }
438 grpc_gcp_handshaker_resp* resp =
439 alts_tsi_utils_deserialize_response(recv_buffer);
440 /* Invalid handshaker response check. */
441 if (resp == nullptr) {
442 gpr_log(GPR_ERROR, "alts_tsi_utils_deserialize_response() failed");
443 cb(TSI_DATA_CORRUPTED, user_data, nullptr, 0, nullptr);
444 return;
445 }
446 grpc_slice* slice = static_cast<grpc_slice*>(resp->out_frames.arg);
447 unsigned char* bytes_to_send = nullptr;
448 size_t bytes_to_send_size = 0;
449 if (slice != nullptr) {
450 bytes_to_send_size = GRPC_SLICE_LENGTH(*slice);
451 while (bytes_to_send_size > handshaker->buffer_size) {
452 handshaker->buffer_size *= 2;
453 handshaker->buffer = static_cast<unsigned char*>(
454 gpr_realloc(handshaker->buffer, handshaker->buffer_size));
455 }
456 memcpy(handshaker->buffer, GRPC_SLICE_START_PTR(*slice),
457 bytes_to_send_size);
458 bytes_to_send = handshaker->buffer;
459 }
460 tsi_handshaker_result* result = nullptr;
461 if (is_handshake_finished_properly(resp)) {
462 create_handshaker_result(resp, handshaker->is_client, &result);
463 set_unused_bytes(result, &handshaker->recv_bytes, resp->bytes_consumed);
464 }
465 grpc_status_code code = static_cast<grpc_status_code>(resp->status.code);
466 if (code != GRPC_STATUS_OK) {
467 grpc_slice* details = static_cast<grpc_slice*>(resp->status.details.arg);
468 if (details != nullptr) {
469 char* error_details = grpc_slice_to_c_string(*details);
470 gpr_log(GPR_ERROR, "Error from handshaker service:%s", error_details);
471 gpr_free(error_details);
472 }
473 }
474 grpc_gcp_handshaker_resp_destroy(resp);
475 cb(alts_tsi_utils_convert_to_tsi_result(code), user_data, bytes_to_send,
476 bytes_to_send_size, result);
477 }
478
479 namespace grpc_core {
480 namespace internal {
481
alts_tsi_handshaker_get_has_sent_start_message_for_testing(alts_tsi_handshaker * handshaker)482 bool alts_tsi_handshaker_get_has_sent_start_message_for_testing(
483 alts_tsi_handshaker* handshaker) {
484 GPR_ASSERT(handshaker != nullptr);
485 return handshaker->has_sent_start_message;
486 }
487
alts_tsi_handshaker_get_is_client_for_testing(alts_tsi_handshaker * handshaker)488 bool alts_tsi_handshaker_get_is_client_for_testing(
489 alts_tsi_handshaker* handshaker) {
490 GPR_ASSERT(handshaker != nullptr);
491 return handshaker->is_client;
492 }
493
alts_tsi_handshaker_set_recv_bytes_for_testing(alts_tsi_handshaker * handshaker,grpc_slice * slice)494 void alts_tsi_handshaker_set_recv_bytes_for_testing(
495 alts_tsi_handshaker* handshaker, grpc_slice* slice) {
496 GPR_ASSERT(handshaker != nullptr && slice != nullptr);
497 handshaker->recv_bytes = grpc_slice_ref(*slice);
498 }
499
alts_tsi_handshaker_get_recv_bytes_for_testing(alts_tsi_handshaker * handshaker)500 grpc_slice alts_tsi_handshaker_get_recv_bytes_for_testing(
501 alts_tsi_handshaker* handshaker) {
502 GPR_ASSERT(handshaker != nullptr);
503 return handshaker->recv_bytes;
504 }
505
alts_tsi_handshaker_set_client_for_testing(alts_tsi_handshaker * handshaker,alts_handshaker_client * client)506 void alts_tsi_handshaker_set_client_for_testing(
507 alts_tsi_handshaker* handshaker, alts_handshaker_client* client) {
508 GPR_ASSERT(handshaker != nullptr && client != nullptr);
509 alts_handshaker_client_destroy(handshaker->client);
510 handshaker->client = client;
511 }
512
alts_tsi_handshaker_get_client_for_testing(alts_tsi_handshaker * handshaker)513 alts_handshaker_client* alts_tsi_handshaker_get_client_for_testing(
514 alts_tsi_handshaker* handshaker) {
515 return handshaker->client;
516 }
517
518 } // namespace internal
519 } // namespace grpc_core
520