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/*
*
* 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.
*
*/
#include <grpc/support/port_platform.h>
#include "src/core/tsi/local_transport_security.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/string_util.h>
#include "src/core/lib/iomgr/exec_ctx.h"
#include "src/core/tsi/transport_security_grpc.h"
namespace {
/* Main struct for local TSI zero-copy frame protector. */
typedef struct local_zero_copy_grpc_protector {
tsi_zero_copy_grpc_protector base;
} local_zero_copy_grpc_protector;
/* Main struct for local TSI handshaker result. */
typedef struct local_tsi_handshaker_result {
tsi_handshaker_result base;
unsigned char* unused_bytes;
size_t unused_bytes_size;
} local_tsi_handshaker_result;
/* Main struct for local TSI handshaker. */
typedef struct local_tsi_handshaker {
tsi_handshaker base;
} local_tsi_handshaker;
/* --- tsi_handshaker_result methods implementation. --- */
tsi_result handshaker_result_extract_peer(const tsi_handshaker_result* /*self*/,
tsi_peer* /*peer*/) {
return TSI_OK;
}
tsi_result handshaker_result_get_frame_protector_type(
const tsi_handshaker_result* /*self*/,
tsi_frame_protector_type* frame_protector_type) {
*frame_protector_type = TSI_FRAME_PROTECTOR_NONE;
return TSI_OK;
}
tsi_result handshaker_result_get_unused_bytes(const tsi_handshaker_result* self,
const unsigned char** bytes,
size_t* bytes_size) {
if (self == nullptr || bytes == nullptr || bytes_size == nullptr) {
gpr_log(GPR_ERROR, "Invalid arguments to get_unused_bytes()");
return TSI_INVALID_ARGUMENT;
}
auto* result = reinterpret_cast<local_tsi_handshaker_result*>(
const_cast<tsi_handshaker_result*>(self));
*bytes_size = result->unused_bytes_size;
*bytes = result->unused_bytes;
return TSI_OK;
}
void handshaker_result_destroy(tsi_handshaker_result* self) {
if (self == nullptr) {
return;
}
local_tsi_handshaker_result* result =
reinterpret_cast<local_tsi_handshaker_result*>(
const_cast<tsi_handshaker_result*>(self));
gpr_free(result->unused_bytes);
gpr_free(result);
}
const tsi_handshaker_result_vtable result_vtable = {
handshaker_result_extract_peer,
handshaker_result_get_frame_protector_type,
nullptr, /* handshaker_result_create_zero_copy_grpc_protector */
nullptr, /* handshaker_result_create_frame_protector */
handshaker_result_get_unused_bytes,
handshaker_result_destroy};
tsi_result create_handshaker_result(const unsigned char* received_bytes,
size_t received_bytes_size,
tsi_handshaker_result** self) {
if (self == nullptr) {
gpr_log(GPR_ERROR, "Invalid arguments to create_handshaker_result()");
return TSI_INVALID_ARGUMENT;
}
local_tsi_handshaker_result* result =
grpc_core::Zalloc<local_tsi_handshaker_result>();
if (received_bytes_size > 0) {
result->unused_bytes =
static_cast<unsigned char*>(gpr_malloc(received_bytes_size));
memcpy(result->unused_bytes, received_bytes, received_bytes_size);
}
result->unused_bytes_size = received_bytes_size;
result->base.vtable = &result_vtable;
*self = &result->base;
return TSI_OK;
}
/* --- tsi_handshaker methods implementation. --- */
tsi_result 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*/) {
if (self == nullptr) {
gpr_log(GPR_ERROR, "Invalid arguments to handshaker_next()");
return TSI_INVALID_ARGUMENT;
}
/* Note that there is no interaction between TSI peers, and all operations are
* local.
*/
*bytes_to_send_size = 0;
create_handshaker_result(received_bytes, received_bytes_size, result);
return TSI_OK;
}
void handshaker_destroy(tsi_handshaker* self) {
if (self == nullptr) {
return;
}
local_tsi_handshaker* handshaker =
reinterpret_cast<local_tsi_handshaker*>(self);
gpr_free(handshaker);
}
const tsi_handshaker_vtable handshaker_vtable = {
nullptr, /* get_bytes_to_send_to_peer -- deprecated */
nullptr, /* process_bytes_from_peer -- deprecated */
nullptr, /* get_result -- deprecated */
nullptr, /* extract_peer -- deprecated */
nullptr, /* create_frame_protector -- deprecated */
handshaker_destroy,
handshaker_next,
nullptr, /* shutdown */
};
} // namespace
tsi_result tsi_local_handshaker_create(tsi_handshaker** self) {
if (self == nullptr) {
gpr_log(GPR_ERROR, "Invalid arguments to local_tsi_handshaker_create()");
return TSI_INVALID_ARGUMENT;
}
local_tsi_handshaker* handshaker = grpc_core::Zalloc<local_tsi_handshaker>();
handshaker->base.vtable = &handshaker_vtable;
*self = &handshaker->base;
return TSI_OK;
}
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