| /* |
| * |
| * Copyright 2018 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| #ifndef GRPC_CORE_TSI_ALTS_FRAME_PROTECTOR_ALTS_RECORD_PROTOCOL_CRYPTER_COMMON_H |
| #define GRPC_CORE_TSI_ALTS_FRAME_PROTECTOR_ALTS_RECORD_PROTOCOL_CRYPTER_COMMON_H |
| |
| #include <grpc/support/port_platform.h> |
| |
| #include <grpc/grpc.h> |
| |
| #include "src/core/tsi/alts/frame_protector/alts_counter.h" |
| #include "src/core/tsi/alts/frame_protector/alts_crypter.h" |
| |
| /** |
| * This file contains common implementation that will be used in both seal and |
| * unseal operations. |
| */ |
| |
| /** |
| * Main struct for alts_record_protocol_crypter that will be used in both |
| * seal and unseal operations. |
| */ |
| typedef struct alts_record_protocol_crypter { |
| alts_crypter base; |
| gsec_aead_crypter* crypter; |
| alts_counter* ctr; |
| } alts_record_protocol_crypter; |
| |
| /** |
| * This method performs input sanity checks on a subset of inputs to |
| * alts_crypter_process_in_place() for both seal and unseal operations. |
| * |
| * - rp_crypter: an alts_record_protocol_crypter instance. |
| * - data: it represents raw data that needs to be sealed in a seal operation or |
| * protected data that needs to be unsealed in an unseal operation. |
| * - output_size: size of data written to the data buffer after a seal or |
| * unseal operation. |
| * - error_details: a buffer containing an error message if any of checked |
| * inputs is nullptr. It is legal to pass nullptr into error_details and |
| * otherwise, the parameter should be freed with gpr_free. |
| * |
| * On success, the method returns GRPC_STATUS_OK. Otherwise, |
| * it returns an error status code along with its details specified in |
| * error_details (if error_details is not nullptr). |
| */ |
| grpc_status_code input_sanity_check( |
| const alts_record_protocol_crypter* rp_crypter, const unsigned char* data, |
| size_t* output_size, char** error_details); |
| |
| /** |
| * This method increments the counter within an alts_record_protocol_crypter |
| * instance. |
| * |
| * - rp_crypter: an alts_record_protocol_crypter instance. |
| * - error_details: a buffer containing an error message if the method does not |
| * function correctly or the counter is wrapped. It is legal to pass nullptr |
| * into error_details and otherwise, the parameter should be freed with |
| * gpr_free. |
| * |
| * On success, the method returns GRPC_STATUS_OK. Otherwise, |
| * it returns an error status code along with its details specified in |
| * error_details (if error_details is not nullptr). |
| */ |
| grpc_status_code increment_counter(alts_record_protocol_crypter* rp_crypter, |
| char** error_details); |
| |
| /** |
| * This method creates an alts_crypter instance, and populates the fields |
| * that are common to both seal and unseal operations. |
| * |
| * - crypter: a gsec_aead_crypter instance used to perform AEAD decryption. The |
| * function does not take ownership of crypter. |
| * - is_client: a flag indicating if the alts_crypter instance will be |
| * used at the client (is_client = true) or server (is_client = |
| * false) side. |
| * - overflow_size: overflow size of counter in bytes. |
| * - error_details: a buffer containing an error message if the method does |
| * not function correctly. It is legal to pass nullptr into error_details, and |
| * otherwise, the parameter should be freed with gpr_free. |
| * |
| * On success of creation, the method returns alts_record_protocol_crypter |
| * instance. Otherwise, it returns nullptr with its details specified in |
| * error_details (if error_details is not nullptr). |
| * |
| */ |
| alts_record_protocol_crypter* alts_crypter_create_common( |
| gsec_aead_crypter* crypter, bool is_client, size_t overflow_size, |
| char** error_details); |
| |
| /** |
| * For the following two methods, please refer to the corresponding API in |
| * alts_crypter.h for detailed specifications. |
| */ |
| size_t alts_record_protocol_crypter_num_overhead_bytes(const alts_crypter* c); |
| |
| void alts_record_protocol_crypter_destruct(alts_crypter* c); |
| |
| #endif /* GRPC_CORE_TSI_ALTS_FRAME_PROTECTOR_ALTS_RECORD_PROTOCOL_CRYPTER_COMMON_H \ |
| */ |