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/*
*
* Copyright 2016 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/grpc.h>
#include <grpc/grpc_security.h>
#include <grpc/support/log.h>
#include "src/core/lib/iomgr/load_file.h"
#include "src/core/lib/security/credentials/credentials.h"
#include "src/core/lib/security/security_connector/security_connector.h"
#include "test/core/util/mock_endpoint.h"
#define CA_CERT_PATH "src/core/tsi/test_creds/ca.pem"
#define SERVER_CERT_PATH "src/core/tsi/test_creds/server1.pem"
#define SERVER_KEY_PATH "src/core/tsi/test_creds/server1.key"
bool squelch = true;
// ssl has an array of global gpr_mu's that are never released.
// Turning this on will fail the leak check.
bool leak_check = false;
static void discard_write(grpc_slice /*slice*/) {}
static void dont_log(gpr_log_func_args* /*args*/) {}
struct handshake_state {
bool done_callback_called;
};
static void on_handshake_done(void* arg, grpc_error_handle error) {
grpc_core::HandshakerArgs* args =
static_cast<grpc_core::HandshakerArgs*>(arg);
struct handshake_state* state =
static_cast<struct handshake_state*>(args->user_data);
GPR_ASSERT(state->done_callback_called == false);
state->done_callback_called = true;
// The fuzzer should not pass the handshake.
GPR_ASSERT(error != GRPC_ERROR_NONE);
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
if (squelch) gpr_set_log_function(dont_log);
grpc_init();
{
grpc_core::ExecCtx exec_ctx;
grpc_resource_quota* resource_quota =
grpc_resource_quota_create("ssl_server_fuzzer");
grpc_endpoint* mock_endpoint =
grpc_mock_endpoint_create(discard_write, resource_quota);
grpc_resource_quota_unref_internal(resource_quota);
grpc_mock_endpoint_put_read(
mock_endpoint, grpc_slice_from_copied_buffer((const char*)data, size));
// Load key pair and establish server SSL credentials.
grpc_slice ca_slice, cert_slice, key_slice;
GPR_ASSERT(GRPC_LOG_IF_ERROR("load_file",
grpc_load_file(CA_CERT_PATH, 1, &ca_slice)));
GPR_ASSERT(GRPC_LOG_IF_ERROR(
"load_file", grpc_load_file(SERVER_CERT_PATH, 1, &cert_slice)));
GPR_ASSERT(GRPC_LOG_IF_ERROR(
"load_file", grpc_load_file(SERVER_KEY_PATH, 1, &key_slice)));
const char* ca_cert =
reinterpret_cast<const char*> GRPC_SLICE_START_PTR(ca_slice);
const char* server_cert =
reinterpret_cast<const char*> GRPC_SLICE_START_PTR(cert_slice);
const char* server_key =
reinterpret_cast<const char*> GRPC_SLICE_START_PTR(key_slice);
grpc_ssl_pem_key_cert_pair pem_key_cert_pair = {server_key, server_cert};
grpc_server_credentials* creds = grpc_ssl_server_credentials_create(
ca_cert, &pem_key_cert_pair, 1, 0, nullptr);
grpc_slice_unref(cert_slice);
grpc_slice_unref(key_slice);
grpc_slice_unref(ca_slice);
// Create security connector
grpc_core::RefCountedPtr<grpc_server_security_connector> sc =
creds->create_security_connector(nullptr);
GPR_ASSERT(sc != nullptr);
grpc_millis deadline = GPR_MS_PER_SEC + grpc_core::ExecCtx::Get()->Now();
struct handshake_state state;
state.done_callback_called = false;
auto handshake_mgr =
grpc_core::MakeRefCounted<grpc_core::HandshakeManager>();
sc->add_handshakers(nullptr, nullptr, handshake_mgr.get());
handshake_mgr->DoHandshake(mock_endpoint, nullptr /* channel_args */,
deadline, nullptr /* acceptor */,
on_handshake_done, &state);
grpc_core::ExecCtx::Get()->Flush();
// If the given string happens to be part of the correct client hello, the
// server will wait for more data. Explicitly fail the server by shutting
// down the endpoint.
if (!state.done_callback_called) {
grpc_endpoint_shutdown(
mock_endpoint,
GRPC_ERROR_CREATE_FROM_STATIC_STRING("Explicit close"));
grpc_core::ExecCtx::Get()->Flush();
}
GPR_ASSERT(state.done_callback_called);
sc.reset(DEBUG_LOCATION, "test");
grpc_server_credentials_release(creds);
grpc_core::ExecCtx::Get()->Flush();
}
grpc_shutdown();
return 0;
}
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