mirror of
https://github.com/google/sandboxed-api.git
synced 2024-03-22 13:11:30 +08:00
120 lines
3.9 KiB
C++
120 lines
3.9 KiB
C++
// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <libgen.h>
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#include <syscall.h>
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#include <cstdlib>
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#include <iostream>
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#include "jsonnet_sapi.sapi.h"
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#include "sandboxed_api/util/flag.h"
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class JsonnetSapiSandbox : public JsonnetSandbox {
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public:
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explicit JsonnetSapiSandbox(std::string in_file, std::string out_file)
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: in_file_(std::move(in_file)), out_file_(std::move(out_file)) {}
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std::unique_ptr<sandbox2::Policy> ModifyPolicy(
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sandbox2::PolicyBuilder *) override {
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return sandbox2::PolicyBuilder()
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.AllowStaticStartup()
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.AllowOpen()
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.AllowRead()
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.AllowWrite()
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.AllowStat()
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.AllowSystemMalloc()
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.AllowExit()
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.AllowSyscalls({
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__NR_futex,
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__NR_close,
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})
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.AddDirectoryAt(dirname(&out_file_[0]), "/output", /*is_ro=*/false)
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.AddFile(in_file_, true)
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.BuildOrDie();
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}
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private:
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std::string in_file_;
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std::string out_file_;
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};
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int main(int argc, char* argv[]) {
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google::InitGoogleLogging(argv[0]);
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gflags::ParseCommandLineFlags(&argc, &argv, true);
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if (!(argc == 3)) {
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std::cerr << "Usage:\n"
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<< basename(argv[0]) << " absolute/path/to/INPUT.jsonnet"
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<< " absolute/path/to/OUTPUT.jsonnet\n";
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return EXIT_FAILURE;
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}
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std::string in_file(argv[1]);
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std::string out_file(argv[2]);
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// Initialize sandbox.
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JsonnetSapiSandbox sandbox(in_file, out_file);
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absl::Status status = sandbox.Init();
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CHECK(status.ok()) << "Sandbox initialization failed " << status;
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JsonnetApi api(&sandbox);
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// Initialize library's main structure.
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sapi::StatusOr<JsonnetVm *> jsonnet_vm = api.c_jsonnet_make();
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sapi::v::RemotePtr vm_pointer(jsonnet_vm.value());
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CHECK(jsonnet_vm.ok()) << "JsonnetVm initialization failed: "
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<< jsonnet_vm.status();
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// Read input file.
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sapi::v::ConstCStr in_file_var(in_file.c_str());
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sapi::StatusOr<char *> input =
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api.c_read_input(false, in_file_var.PtrBefore());
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CHECK(input.ok()) << "Reading input file failed " << input.status();
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// Process jsonnet data.
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sapi::v::RemotePtr input_pointer(input.value());
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sapi::v::Int error;
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sapi::StatusOr<char *> output = api.c_jsonnet_fmt_snippet(
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&vm_pointer, in_file_var.PtrBefore(), &input_pointer, error.PtrAfter());
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CHECK(output.ok() && !error.GetValue())
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<< "Jsonnet code evaluation failed: " << output.status() << " "
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<< error.GetValue();
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// Write data to file.
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std::string out_file_in_sandboxee(std::string("/output/") +
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basename(&out_file[0]));
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sapi::v::ConstCStr out_file_var(out_file_in_sandboxee.c_str());
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sapi::v::RemotePtr output_pointer(output.value());
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sapi::StatusOr<bool> success;
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success = api.c_write_output_file(&output_pointer, out_file_var.PtrBefore());
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CHECK(success.ok() && success.value())
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<< "Writing to output file failed " << success.status() << " "
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<< success.value();
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// Clean up.
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sapi::StatusOr<char *> result =
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api.c_jsonnet_realloc(&vm_pointer, &output_pointer, 0);
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CHECK(result.ok()) << "JsonnetVm realloc failed: " << result.status();
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status = api.c_jsonnet_destroy(&vm_pointer);
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CHECK(status.ok()) << "JsonnetVm destroy failed: " << status;
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status = api.c_free_input(&input_pointer);
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CHECK(status.ok()) << "Input freeing failed: " << status;
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return EXIT_SUCCESS;
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}
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