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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 <string.h>
#include <grpc/grpc.h>
#include <grpc/grpc_security.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/string_util.h>
#include "test/core/util/fuzzer_util.h"
#include "test/core/util/memory_counters.h"
#include "src/core/lib/gpr/env.h"
#include "src/core/lib/security/credentials/alts/alts_credentials.h"
#include "src/core/lib/security/credentials/alts/check_gcp_environment.h"
#include "src/core/lib/security/credentials/alts/grpc_alts_credentials_options.h"
using grpc_core::testing::grpc_fuzzer_get_next_byte;
using grpc_core::testing::grpc_fuzzer_get_next_string;
using grpc_core::testing::input_stream;
// Logging
bool squelch = true;
bool leak_check = true;
static void dont_log(gpr_log_func_args* args) {}
// Add a random number of target service accounts to client options.
static void read_target_service_accounts(
input_stream* inp, grpc_alts_credentials_options* options) {
size_t n = grpc_fuzzer_get_next_byte(inp);
for (size_t i = 0; i < n; i++) {
char* service_account = grpc_fuzzer_get_next_string(inp, nullptr);
if (service_account != nullptr) {
grpc_alts_credentials_client_options_add_target_service_account(
options, service_account);
gpr_free(service_account);
}
}
// Added to improve code coverage.
grpc_alts_credentials_client_options_add_target_service_account(options,
nullptr);
grpc_alts_credentials_client_options_add_target_service_account(
nullptr, "this is service account");
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
char* grpc_trace_fuzzer = gpr_getenv("GRPC_TRACE_FUZZER");
if (squelch && grpc_trace_fuzzer == nullptr) {
gpr_set_log_function(dont_log);
}
gpr_free(grpc_trace_fuzzer);
struct grpc_memory_counters counters;
if (leak_check) {
grpc_memory_counters_init();
}
input_stream inp = {data, data + size};
grpc_init();
bool is_on_gcp = grpc_alts_is_running_on_gcp();
while (inp.cur != inp.end) {
bool enable_untrusted_alts = grpc_fuzzer_get_next_byte(&inp) & 0x01;
char* handshaker_service_url =
grpc_fuzzer_get_next_byte(&inp) & 0x01
? grpc_fuzzer_get_next_string(&inp, nullptr)
: nullptr;
if (grpc_fuzzer_get_next_byte(&inp) & 0x01) {
// Test ALTS channel credentials.
grpc_alts_credentials_options* options =
grpc_alts_credentials_client_options_create();
read_target_service_accounts(&inp, options);
grpc_channel_credentials* cred = grpc_alts_credentials_create_customized(
options, handshaker_service_url, enable_untrusted_alts);
if (!enable_untrusted_alts && !is_on_gcp) {
GPR_ASSERT(cred == nullptr);
} else {
GPR_ASSERT(cred != nullptr);
}
grpc_channel_credentials_release(cred);
grpc_alts_credentials_options_destroy(options);
} else {
// Test ALTS server credentials.
grpc_alts_credentials_options* options =
grpc_alts_credentials_server_options_create();
grpc_server_credentials* cred =
grpc_alts_server_credentials_create_customized(
options, handshaker_service_url, enable_untrusted_alts);
if (!enable_untrusted_alts && !is_on_gcp) {
GPR_ASSERT(cred == nullptr);
} else {
GPR_ASSERT(cred != nullptr);
}
grpc_server_credentials_release(cred);
grpc_alts_credentials_options_destroy(options);
}
gpr_free(handshaker_service_url);
}
grpc_shutdown();
if (leak_check) {
counters = grpc_memory_counters_snapshot();
grpc_memory_counters_destroy();
GPR_ASSERT(counters.total_size_relative == 0);
}
return 0;
}
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