// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/stringprintf.h"
#include "sandbox/win/src/handle_policy.h"
#include "sandbox/win/src/nt_internals.h"
#include "sandbox/win/src/sandbox.h"
#include "sandbox/win/src/sandbox_factory.h"
#include "sandbox/win/src/sandbox_policy.h"
#include "sandbox/win/src/win_utils.h"
#include "sandbox/win/tests/common/controller.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace sandbox {

// Just waits for the supplied number of milliseconds.
SBOX_TESTS_COMMAND int Handle_WaitProcess(int argc, wchar_t **argv) {
  if (argc != 1)
    return SBOX_TEST_FAILED_TO_EXECUTE_COMMAND;

  ::Sleep(::wcstoul(argv[0], NULL, 10));
  return SBOX_TEST_TIMED_OUT;
}

// Attempts to duplicate an event handle into the target process.
SBOX_TESTS_COMMAND int Handle_DuplicateEvent(int argc, wchar_t **argv) {
  if (argc != 1)
    return SBOX_TEST_FAILED_TO_EXECUTE_COMMAND;

  // Create a test event to use as a handle.
  base::win::ScopedHandle test_event;
  test_event.Set(::CreateEvent(NULL, TRUE, TRUE, NULL));
  if (!test_event.IsValid())
    return SBOX_TEST_FIRST_ERROR;

  // Get the target process ID.
  DWORD target_process_id = ::wcstoul(argv[0], NULL, 10);

  HANDLE handle = NULL;
  ResultCode result = SandboxFactory::GetTargetServices()->DuplicateHandle(
      test_event, target_process_id, &handle, 0, DUPLICATE_SAME_ACCESS);

  return (result == SBOX_ALL_OK) ? SBOX_TEST_SUCCEEDED : SBOX_TEST_DENIED;
}

// Tests that duplicating an object works only when the policy allows it.
TEST(HandlePolicyTest, DuplicateHandle) {
  TestRunner target;
  TestRunner runner;

  // Kick off an asynchronous target process for testing.
  target.SetAsynchronous(true);
  EXPECT_EQ(SBOX_TEST_SUCCEEDED, target.RunTest(L"Handle_WaitProcess 30000"));

  // First test that we fail to open the event.
  std::wstring cmd_line = base::StringPrintf(L"Handle_DuplicateEvent %d",
                                             target.process_id());
  EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(cmd_line.c_str()));

  // Now successfully open the event after adding a duplicate handle rule.
  EXPECT_TRUE(runner.AddRule(TargetPolicy::SUBSYS_HANDLES,
                             TargetPolicy::HANDLES_DUP_ANY,
                             L"Event"));
  EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(cmd_line.c_str()));
}

// Tests that duplicating an object works only when the policy allows it.
TEST(HandlePolicyTest, DuplicatePeerHandle) {
  TestRunner target;
  TestRunner runner;

  // Kick off an asynchronous target process for testing.
  target.SetAsynchronous(true);
  target.SetUnsandboxed(true);
  EXPECT_EQ(SBOX_TEST_SUCCEEDED, target.RunTest(L"Handle_WaitProcess 30000"));

  // First test that we fail to open the event.
  std::wstring cmd_line = base::StringPrintf(L"Handle_DuplicateEvent %d",
                                             target.process_id());
  EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(cmd_line.c_str()));

  // Now successfully open the event after adding a duplicate handle rule.
  EXPECT_TRUE(runner.AddRule(TargetPolicy::SUBSYS_HANDLES,
                             TargetPolicy::HANDLES_DUP_ANY,
                             L"Event"));
  EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(cmd_line.c_str()));
}

// Tests that duplicating an object works only when the policy allows it.
TEST(HandlePolicyTest, DuplicateBrokerHandle) {
  TestRunner runner;

  // First test that we fail to open the event.
  std::wstring cmd_line = base::StringPrintf(L"Handle_DuplicateEvent %d",
                                             ::GetCurrentProcessId());
  EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(cmd_line.c_str()));

  // Add the peer rule and make sure we fail again.
  EXPECT_TRUE(runner.AddRule(TargetPolicy::SUBSYS_HANDLES,
                             TargetPolicy::HANDLES_DUP_ANY,
                             L"Event"));
  EXPECT_EQ(SBOX_TEST_DENIED, runner.RunTest(cmd_line.c_str()));


  // Now successfully open the event after adding a broker handle rule.
  EXPECT_TRUE(runner.AddRule(TargetPolicy::SUBSYS_HANDLES,
                             TargetPolicy::HANDLES_DUP_BROKER,
                             L"Event"));
  EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(cmd_line.c_str()));
}

}  // namespace sandbox