mirror of
https://github.com/google/sandboxed-api.git
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131 lines
4.3 KiB
C++
131 lines
4.3 KiB
C++
// Copyright 2019 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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// https://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 "sandboxed_api/sandbox2/buffer.h"
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#include <sys/stat.h>
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#include <syscall.h>
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#include <unistd.h>
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#include <cerrno>
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#include <memory>
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#include <string>
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#include <utility>
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#include <vector>
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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#include "absl/log/log.h"
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#include "sandboxed_api/sandbox2/comms.h"
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#include "sandboxed_api/sandbox2/executor.h"
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#include "sandboxed_api/sandbox2/ipc.h"
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#include "sandboxed_api/sandbox2/policy.h"
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#include "sandboxed_api/sandbox2/result.h"
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#include "sandboxed_api/sandbox2/sandbox2.h"
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#include "sandboxed_api/testing.h"
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#include "sandboxed_api/util/status_matchers.h"
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namespace sandbox2 {
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namespace {
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using ::sapi::CreateDefaultPermissiveTestPolicy;
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using ::sapi::GetTestSourcePath;
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using ::testing::Eq;
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using ::testing::IsTrue;
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using ::testing::Ne;
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// Test all public methods of sandbox2::Buffer.
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TEST(BufferTest, TestImplementation) {
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constexpr int kSize = 1024;
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SAPI_ASSERT_OK_AND_ASSIGN(auto buffer, Buffer::CreateWithSize(kSize));
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EXPECT_THAT(buffer->size(), Eq(kSize));
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uint8_t* raw_buf = buffer->data();
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for (int i = 0; i < kSize; i++) {
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raw_buf[i] = 'X';
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}
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SAPI_ASSERT_OK_AND_ASSIGN(auto buffer2, Buffer::CreateFromFd(buffer->fd()));
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uint8_t* raw_buf2 = buffer2->data();
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for (int i = 0; i < kSize; i++) {
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EXPECT_THAT(raw_buf2[i], Eq('X'));
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}
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}
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// Test sharing of buffer between executor/sandboxee using dup/MapFd.
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TEST(BufferTest, TestWithSandboxeeMapFd) {
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const std::string path = GetTestSourcePath("sandbox2/testcases/buffer");
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std::vector<std::string> args = {path, "1"};
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auto executor = std::make_unique<Executor>(path, args);
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SAPI_ASSERT_OK_AND_ASSIGN(auto policy,
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CreateDefaultPermissiveTestPolicy(path).TryBuild());
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SAPI_ASSERT_OK_AND_ASSIGN(auto buffer,
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Buffer::CreateWithSize(1ULL << 20 /* 1MiB */));
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// buffer() uses the internal fd to mmap the buffer.
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uint8_t* buf = buffer->data();
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// Test that we can write data to the sandboxee.
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buf[0] = 'A';
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// Map buffer as fd 3, but careful because MapFd closes the buffer fd and
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// we need to keep it since buffer uses it for mmap, so we must dup.
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executor->ipc()->MapFd(dup(buffer->fd()), 3);
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Sandbox2 s2(std::move(executor), std::move(policy));
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auto result = s2.Run();
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EXPECT_THAT(result.final_status(), Eq(Result::OK));
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EXPECT_THAT(result.reason_code(), Eq(0));
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// Test that we can read data from the sandboxee.
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EXPECT_THAT(buf[buffer->size() - 1], Eq('B'));
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// Test that internal buffer fd remains valid.
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struct stat stat_buf;
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EXPECT_THAT(fstat(buffer->fd(), &stat_buf), Ne(-1));
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}
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// Test sharing of buffer between executor/sandboxee using SendFD/RecvFD.
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TEST(BufferTest, TestWithSandboxeeSendRecv) {
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const std::string path = GetTestSourcePath("sandbox2/testcases/buffer");
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std::vector<std::string> args = {path, "2"};
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auto executor = std::make_unique<Executor>(path, args);
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SAPI_ASSERT_OK_AND_ASSIGN(auto policy,
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CreateDefaultPermissiveTestPolicy(path).TryBuild());
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Sandbox2 s2(std::move(executor), std::move(policy));
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ASSERT_THAT(s2.RunAsync(), IsTrue());
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Comms* comms = s2.comms();
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SAPI_ASSERT_OK_AND_ASSIGN(auto buffer,
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Buffer::CreateWithSize(1ULL << 20 /* 1MiB */));
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uint8_t* buf = buffer->data();
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// Test that we can write data to the sandboxee.
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buf[0] = 'A';
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EXPECT_THAT(comms->SendFD(buffer->fd()), IsTrue());
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auto result = s2.AwaitResult();
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EXPECT_THAT(result.final_status(), Eq(Result::OK));
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EXPECT_THAT(result.reason_code(), Eq(0));
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// Test that we can read data from the sandboxee.
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EXPECT_THAT(buf[buffer->size() - 1], Eq('B'));
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// Test that internal buffer fd remains valid.
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struct stat stat_buf;
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EXPECT_THAT(fstat(buffer->fd(), &stat_buf), Ne(-1));
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}
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} // namespace
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} // namespace sandbox2
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