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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/transport/security_connector.h"
#include "test/core/end2end/data/ssl_test_data.h"
#include "test/core/util/memory_counters.h"
#include "test/core/util/mock_endpoint.h"
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(grpc_exec_ctx *exec_ctx, void *arg,
grpc_error *error) {
grpc_handshaker_args *args = arg;
struct handshake_state *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);
}
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
struct grpc_memory_counters counters;
if (squelch) gpr_set_log_function(dont_log);
if (leak_check) grpc_memory_counters_init();
grpc_init();
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
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(&exec_ctx, resource_quota);
grpc_mock_endpoint_put_read(
&exec_ctx, mock_endpoint,
grpc_slice_from_copied_buffer((const char *)data, size));
// Load key pair and establish server SSL credentials.
grpc_ssl_pem_key_cert_pair pem_key_cert_pair;
grpc_slice ca_slice, cert_slice, key_slice;
ca_slice = grpc_slice_from_static_string(test_root_cert);
cert_slice = grpc_slice_from_static_string(test_server1_cert);
key_slice = grpc_slice_from_static_string(test_server1_key);
const char *ca_cert = (const char *)GRPC_SLICE_START_PTR(ca_slice);
pem_key_cert_pair.private_key = (const char *)GRPC_SLICE_START_PTR(key_slice);
pem_key_cert_pair.cert_chain = (const char *)GRPC_SLICE_START_PTR(cert_slice);
grpc_server_credentials *creds = grpc_ssl_server_credentials_create(
ca_cert, &pem_key_cert_pair, 1, 0, NULL);
// Create security connector
grpc_server_security_connector *sc = NULL;
grpc_security_status status =
grpc_server_credentials_create_security_connector(&exec_ctx, creds, &sc);
GPR_ASSERT(status == GRPC_SECURITY_OK);
grpc_millis deadline = GPR_MS_PER_SEC + grpc_exec_ctx_now(&exec_ctx);
struct handshake_state state;
state.done_callback_called = false;
grpc_handshake_manager *handshake_mgr = grpc_handshake_manager_create();
grpc_server_security_connector_add_handshakers(&exec_ctx, sc, handshake_mgr);
grpc_handshake_manager_do_handshake(
&exec_ctx, handshake_mgr, mock_endpoint, NULL /* channel_args */,
deadline, NULL /* acceptor */, on_handshake_done, &state);
grpc_exec_ctx_flush(&exec_ctx);
// 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(
&exec_ctx, mock_endpoint,
GRPC_ERROR_CREATE_FROM_STATIC_STRING("Explicit close"));
grpc_exec_ctx_flush(&exec_ctx);
}
GPR_ASSERT(state.done_callback_called);
grpc_handshake_manager_destroy(&exec_ctx, handshake_mgr);
GRPC_SECURITY_CONNECTOR_UNREF(&exec_ctx, &sc->base, "test");
grpc_server_credentials_release(creds);
grpc_slice_unref(cert_slice);
grpc_slice_unref(key_slice);
grpc_slice_unref(ca_slice);
grpc_exec_ctx_flush(&exec_ctx);
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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