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/frame_protector/alts_crypter.h"
22
23 #include <string.h>
24
25 #include <grpc/support/alloc.h>
26
maybe_copy_error_msg(const char * src,char ** dst)27 static void maybe_copy_error_msg(const char* src, char** dst) {
28 if (dst != nullptr && src != nullptr) {
29 *dst = static_cast<char*>(gpr_malloc(strlen(src) + 1));
30 memcpy(*dst, src, strlen(src) + 1);
31 }
32 }
33
alts_crypter_process_in_place(alts_crypter * crypter,unsigned char * data,size_t data_allocated_size,size_t data_size,size_t * output_size,char ** error_details)34 grpc_status_code alts_crypter_process_in_place(
35 alts_crypter* crypter, unsigned char* data, size_t data_allocated_size,
36 size_t data_size, size_t* output_size, char** error_details) {
37 if (crypter != nullptr && crypter->vtable != nullptr &&
38 crypter->vtable->process_in_place != nullptr) {
39 return crypter->vtable->process_in_place(crypter, data, data_allocated_size,
40 data_size, output_size,
41 error_details);
42 }
43 /* An error occurred. */
44 const char error_msg[] =
45 "crypter or crypter->vtable has not been initialized properly.";
46 maybe_copy_error_msg(error_msg, error_details);
47 return GRPC_STATUS_INVALID_ARGUMENT;
48 }
49
alts_crypter_num_overhead_bytes(const alts_crypter * crypter)50 size_t alts_crypter_num_overhead_bytes(const alts_crypter* crypter) {
51 if (crypter != nullptr && crypter->vtable != nullptr &&
52 crypter->vtable->num_overhead_bytes != nullptr) {
53 return crypter->vtable->num_overhead_bytes(crypter);
54 }
55 /* An error occurred. */
56 return 0;
57 }
58
alts_crypter_destroy(alts_crypter * crypter)59 void alts_crypter_destroy(alts_crypter* crypter) {
60 if (crypter != nullptr) {
61 if (crypter->vtable != nullptr && crypter->vtable->destruct != nullptr) {
62 crypter->vtable->destruct(crypter);
63 }
64 gpr_free(crypter);
65 }
66 }
67