mirror of
https://github.com/google/sandboxed-api.git
synced 2024-03-22 13:11:30 +08:00
126 lines
4.0 KiB
C++
126 lines
4.0 KiB
C++
// Copyright 2019 Google LLC. All Rights Reserved.
|
|
//
|
|
// 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 <fcntl.h>
|
|
#include <linux/filter.h>
|
|
#include <sys/resource.h>
|
|
#include <syscall.h>
|
|
|
|
#include <cstddef>
|
|
#include <cstdint>
|
|
#include <cstdio>
|
|
#include <cstdlib>
|
|
#include <memory>
|
|
#include <string>
|
|
#include <utility>
|
|
#include <vector>
|
|
|
|
#include <glog/logging.h>
|
|
#include "sandboxed_api/util/flag.h"
|
|
#include "absl/memory/memory.h"
|
|
#include "sandboxed_api/sandbox2/comms.h"
|
|
#include "sandboxed_api/sandbox2/executor.h"
|
|
#include "sandboxed_api/sandbox2/ipc.h"
|
|
#include "sandboxed_api/sandbox2/limits.h"
|
|
#include "sandboxed_api/sandbox2/policy.h"
|
|
#include "sandboxed_api/sandbox2/policybuilder.h"
|
|
#include "sandboxed_api/sandbox2/result.h"
|
|
#include "sandboxed_api/sandbox2/sandbox2.h"
|
|
#include "sandboxed_api/sandbox2/util/bpf_helper.h"
|
|
#include "sandboxed_api/sandbox2/util/runfiles.h"
|
|
|
|
ABSL_FLAG(string, input, "", "Input file");
|
|
ABSL_FLAG(string, output, "", "Output file");
|
|
ABSL_FLAG(bool, decompress, false, "Decompress instead of compress.");
|
|
|
|
namespace {
|
|
|
|
std::unique_ptr<sandbox2::Policy> GetPolicy() {
|
|
return sandbox2::PolicyBuilder()
|
|
// Allow read on STDIN.
|
|
.AddPolicyOnSyscall(__NR_read, {ARG_32(0), JEQ32(0, ALLOW)})
|
|
// Allow write on STDOUT / STDERR.
|
|
.AddPolicyOnSyscall(__NR_write,
|
|
{ARG_32(0), JEQ32(1, ALLOW), JEQ32(2, ALLOW)})
|
|
.AllowSyscall(__NR_fstat)
|
|
.AllowStaticStartup()
|
|
.AllowSystemMalloc()
|
|
.AllowExit()
|
|
.EnableNamespaces()
|
|
.BlockSyscallWithErrno(__NR_access, ENOENT)
|
|
.BuildOrDie();
|
|
}
|
|
|
|
} // namespace
|
|
|
|
int main(int argc, char** argv) {
|
|
gflags::ParseCommandLineFlags(&argc, &argv, true);
|
|
google::InitGoogleLogging(argv[0]);
|
|
|
|
if (absl::GetFlag(FLAGS_input).empty()) {
|
|
LOG(ERROR) << "Parameter --input required.";
|
|
return 1;
|
|
}
|
|
|
|
if (absl::GetFlag(FLAGS_output).empty()) {
|
|
LOG(ERROR) << "Parameter --output required.";
|
|
return 1;
|
|
}
|
|
|
|
std::string path = sandbox2::GetInternalDataDependencyFilePath(
|
|
"sandbox2/examples/zlib/zpipe");
|
|
std::vector<std::string> args = {path};
|
|
if (absl::GetFlag(FLAGS_decompress)) {
|
|
args.push_back("-d");
|
|
}
|
|
std::vector<std::string> envs = {};
|
|
auto executor = absl::make_unique<sandbox2::Executor>(path, args, envs);
|
|
|
|
executor
|
|
// Kill sandboxed processes with a signal (SIGXFSZ) if it writes more than
|
|
// these many bytes to the file-system.
|
|
->limits()
|
|
->set_rlimit_fsize(1ULL << 30) // 1GiB
|
|
.set_rlimit_cpu(60) // The CPU time limit in seconds.
|
|
.set_walltime_limit(absl::Seconds(5));
|
|
|
|
// Create input + output FD.
|
|
int fd_in = open(absl::GetFlag(FLAGS_input).c_str(), O_RDONLY);
|
|
int fd_out = open(absl::GetFlag(FLAGS_output).c_str(),
|
|
O_WRONLY | O_CREAT | O_TRUNC, 0644);
|
|
CHECK_GE(fd_in, 0);
|
|
CHECK_GE(fd_out, 0);
|
|
executor->ipc()->MapFd(fd_in, STDIN_FILENO);
|
|
executor->ipc()->MapFd(fd_out, STDOUT_FILENO);
|
|
|
|
auto policy = GetPolicy();
|
|
sandbox2::Sandbox2 s2(std::move(executor), std::move(policy));
|
|
|
|
// Let the sandboxee run.
|
|
auto result = s2.Run();
|
|
close(fd_in);
|
|
close(fd_out);
|
|
if (result.final_status() != sandbox2::Result::OK) {
|
|
LOG(ERROR) << "Sandbox error: " << result.ToString();
|
|
return 2; // e.g. sandbox violation, signal (sigsegv)
|
|
}
|
|
auto code = result.reason_code();
|
|
if (code) {
|
|
LOG(ERROR) << "Sandboxee exited with non-zero: " << code;
|
|
return 3; // e.g. normal child error
|
|
}
|
|
LOG(INFO) << "Sandboxee finished: " << result.ToString();
|
|
return EXIT_SUCCESS;
|
|
}
|