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https://github.com/google/sandboxed-api.git
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33206c5d3f
On some newer compiler versions, compiler optimizations and loop unrolling change the memory layout so that 64 bytes are not enough to overwrite the return address reliably. PiperOrigin-RevId: 240343358 Change-Id: Ifb1a1dc1cb482793b7387887f0fd68a237879227
88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
// Copyright 2019 Google LLC. All Rights Reserved.
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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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// Unit tests for crc4sandbox example.
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#include <unistd.h>
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#include <string>
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#include <glog/logging.h>
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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#include "sandboxed_api/sandbox2/testing.h"
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#include "sandboxed_api/sandbox2/util.h"
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#include "sandboxed_api/util/status_matchers.h"
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using ::testing::Eq;
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using ::testing::StrEq;
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namespace sandbox2 {
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namespace {
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class CRC4Test : public ::testing::Test {
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protected:
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void SetUp() override {
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path_ = GetTestSourcePath("sandbox2/examples/crc4/crc4sandbox");
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util::CharPtrArrToVecString(environ, &env_);
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}
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std::string path_;
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std::vector<std::string> env_;
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};
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// Test that crc4sandbox works.
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TEST_F(CRC4Test, TestNormalOperation) {
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SKIP_SANITIZERS_AND_COVERAGE;
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std::string output;
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SAPI_ASSERT_OK_AND_ASSIGN(
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int exit_code,
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util::Communicate({path_, "-input", "ABCD"}, env_, &output));
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EXPECT_THAT(output, StrEq("0x44434241\n"));
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EXPECT_THAT(exit_code, Eq(0));
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}
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// Test that crc4sandbox protects against bugs, because only the sandboxee
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// will crash and break its communication with executor.
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TEST_F(CRC4Test, TestExploitAttempt) {
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SKIP_SANITIZERS_AND_COVERAGE;
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std::string output;
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SAPI_ASSERT_OK_AND_ASSIGN(
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int exit_code, util::Communicate({path_, "-input", std::string(128, 'A')},
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env_, &output));
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LOG(INFO) << "Output: " << output;
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EXPECT_THAT(exit_code, Eq(3));
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}
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// Test that if sandboxee calls a syscall that is not allowed by the policy,
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// it triggers a policy violation for the executor.
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TEST_F(CRC4Test, TestSyscallViolation) {
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SKIP_SANITIZERS_AND_COVERAGE;
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std::string output;
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SAPI_ASSERT_OK_AND_ASSIGN(
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int exit_code,
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util::Communicate({path_, "-input", "x", "-call_syscall_not_allowed"},
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env_, &output));
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LOG(INFO) << "Output: " << output;
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EXPECT_THAT(exit_code, Eq(3));
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}
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} // namespace
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} // namespace sandbox2
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