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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/updater/device_management/dm_message.h"
#include <stdint.h>
#include <memory>
#include <string>
#include <utility>
#include "base/time/time.h"
#include "chrome/enterprise_companion/device_management_storage/dm_storage.h"
#include "chrome/updater/device_management/dm_policy_builder_for_testing.h"
#include "chrome/updater/device_management/dm_response_validator.h"
#include "chrome/updater/protos/omaha_settings.pb.h"
#include "components/policy/core/common/policy_types.h"
#include "components/policy/proto/device_management_backend.pb.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace updater {
TEST(DMMessage, GetRegisterBrowserRequestData) {
std::string message = GetRegisterBrowserRequestData();
EXPECT_FALSE(message.empty());
}
TEST(DMMessage, GetPolicyFetchRequestData) {
std::string policy_type("google/machine-level-omaha");
std::unique_ptr<
::wireless_android_enterprise_devicemanagement::OmahaSettingsClientProto>
omaha_settings = GetDefaultTestingOmahaPolicyProto();
std::unique_ptr<DMPolicyBuilderForTesting> policy_builder =
DMPolicyBuilderForTesting::CreateInstanceWithOptions(
true /* first request */, false /* rotate to new key */,
DMPolicyBuilderForTesting::SigningOption::kSignNormally,
"test-dm-token", "test-device-id");
std::string policy_response_string(
policy_builder->GetResponseBlobForPolicyPayload(
policy_type, omaha_settings->SerializeAsString()));
device_management_storage::CachedPolicyInfo policy_info;
ASSERT_TRUE(policy_info.Populate(policy_response_string));
const std::string request_data = GetPolicyFetchRequestData(
policy::PolicyFetchReason::kScheduled, policy_type, policy_info);
EXPECT_FALSE(request_data.empty());
enterprise_management::DeviceManagementRequest dm_request;
ASSERT_TRUE(dm_request.ParseFromString(request_data));
ASSERT_TRUE(dm_request.has_policy_request());
const enterprise_management::DevicePolicyRequest& device_policy_request =
dm_request.policy_request();
ASSERT_TRUE(device_policy_request.has_reason());
EXPECT_EQ(device_policy_request.reason(),
enterprise_management::DevicePolicyRequest::SCHEDULED);
}
TEST(DMMessage, ParseDeviceRegistrationResponse) {
enterprise_management::DeviceManagementResponse dm_response;
dm_response.mutable_register_response()->set_device_management_token(
"test-dm-token-foo");
EXPECT_EQ(ParseDeviceRegistrationResponse(dm_response.SerializeAsString()),
"test-dm-token-foo");
}
TEST(DMMessage, ParsePolicyFetchResponse) {
const std::string policy_type = "google/machine-level-omaha";
const base::Time test_start_time = base::Time::Now() - base::Milliseconds(1);
// Test DM response with first policy fetch request.
std::unique_ptr<::enterprise_management::DeviceManagementResponse>
dm_response = GetDefaultTestingPolicyFetchDMResponse(
true /* first_request */, false /* rotate_to_new_key */,
DMPolicyBuilderForTesting::SigningOption::kSignNormally);
device_management_storage::CachedPolicyInfo initial_policy_info;
std::vector<PolicyValidationResult> validation_results;
DMPolicyMap policy_map = ParsePolicyFetchResponse(
dm_response->SerializeAsString(), initial_policy_info, "test-dm-token",
"test-device-id", validation_results);
EXPECT_TRUE(validation_results.empty());
EXPECT_EQ(policy_map.size(), size_t{1});
EXPECT_NE(policy_map.find(policy_type), policy_map.end());
std::string policy_data = policy_map[policy_type];
device_management_storage::CachedPolicyInfo updated_policy_info;
updated_policy_info.Populate(policy_data);
EXPECT_FALSE(updated_policy_info.public_key().empty());
EXPECT_GE(base::Time::UnixEpoch() +
base::Milliseconds(updated_policy_info.timestamp()),
test_start_time);
// Test the case when public key is not rotated.
dm_response = GetDefaultTestingPolicyFetchDMResponse(
false /* first_request */, false /* rotate_to_new_key */,
DMPolicyBuilderForTesting::SigningOption::kSignNormally);
policy_map = ParsePolicyFetchResponse(dm_response->SerializeAsString(),
updated_policy_info, "test-dm-token",
"test-device-id", validation_results);
EXPECT_TRUE(validation_results.empty());
EXPECT_EQ(policy_map.size(), size_t{1});
EXPECT_NE(policy_map.find(policy_type), policy_map.end());
device_management_storage::CachedPolicyInfo updated_policy_info2;
updated_policy_info.Populate(policy_map[policy_type]);
EXPECT_TRUE(updated_policy_info2.public_key().empty());
// Test response that rotates to a new public key.
dm_response = GetDefaultTestingPolicyFetchDMResponse(
false /* first_request */, true /* rotate_to_new_key */,
DMPolicyBuilderForTesting::SigningOption::kSignNormally);
policy_map = ParsePolicyFetchResponse(dm_response->SerializeAsString(),
updated_policy_info, "test-dm-token",
"test-device-id", validation_results);
EXPECT_TRUE(validation_results.empty());
EXPECT_EQ(policy_map.size(), size_t{1});
EXPECT_NE(policy_map.find(policy_type), policy_map.end());
// Verify that we got a new public key.
device_management_storage::CachedPolicyInfo updated_policy_info3;
updated_policy_info3.Populate(policy_map[policy_type]);
std::string new_public_key = updated_policy_info3.public_key();
EXPECT_FALSE(new_public_key.empty());
EXPECT_NE(new_public_key, updated_policy_info.public_key());
EXPECT_GE(updated_policy_info3.timestamp(), updated_policy_info.timestamp());
}
TEST(DMMessage, ResponseValidation) {
const std::string policy_type = "google/machine-level-omaha";
// 1) Clients rejects DM responses if it is not intended for the
// expected device ID or DM token.
std::unique_ptr<::enterprise_management::DeviceManagementResponse>
dm_response = GetDefaultTestingPolicyFetchDMResponse(
true /* first_request */, false /* rotate_to_new_key */,
DMPolicyBuilderForTesting::SigningOption::kSignNormally);
const std::string dm_response_data = dm_response->SerializeAsString();
device_management_storage::CachedPolicyInfo initial_policy_info;
const std::string bad_dm_token = "bad-dm-token";
std::vector<PolicyValidationResult> validation_results;
DMPolicyMap policy_map = ParsePolicyFetchResponse(
dm_response_data, initial_policy_info, bad_dm_token, "test-device-id",
validation_results);
EXPECT_EQ(validation_results.size(), size_t{1});
EXPECT_EQ(validation_results[0].policy_type, policy_type);
EXPECT_EQ(validation_results[0].status,
PolicyValidationResult::Status::kValidationBadDMToken);
EXPECT_TRUE(validation_results[0].issues.empty());
EXPECT_TRUE(policy_map.empty());
validation_results.clear();
const std::string bad_devide_id = "unexpected-device-id";
policy_map = ParsePolicyFetchResponse(dm_response_data, initial_policy_info,
"test-dm-token", bad_devide_id,
validation_results);
EXPECT_EQ(validation_results.size(), size_t{1});
EXPECT_EQ(validation_results[0].policy_type, policy_type);
EXPECT_EQ(validation_results[0].status,
PolicyValidationResult::Status::kValidationBadDeviceID);
EXPECT_TRUE(validation_results[0].issues.empty());
EXPECT_TRUE(policy_map.empty());
validation_results.clear();
// 2) Client must have a cached public key other than the first request.
dm_response = GetDefaultTestingPolicyFetchDMResponse(
false /* first_request */, false /* rotate_to_new_key */,
DMPolicyBuilderForTesting::SigningOption::kSignNormally);
policy_map = ParsePolicyFetchResponse(dm_response->SerializeAsString(),
initial_policy_info, "test-dm-token",
"test-device-id", validation_results);
EXPECT_EQ(validation_results.size(), size_t{1});
EXPECT_EQ(validation_results[0].policy_type, policy_type);
EXPECT_EQ(validation_results[0].status,
PolicyValidationResult::Status::kValidationBadSignature);
EXPECT_TRUE(validation_results[0].issues.empty());
EXPECT_TRUE(policy_map.empty());
validation_results.clear();
// 3) Client should reject response if the public key is not signed properly.
// First create a DM response to update cached policy info (gets a key
// to sign the new key).
dm_response = GetDefaultTestingPolicyFetchDMResponse(
true /* first_request */, false /* rotate_to_new_key */,
DMPolicyBuilderForTesting::SigningOption::kSignNormally);
policy_map = ParsePolicyFetchResponse(dm_response->SerializeAsString(),
initial_policy_info, "test-dm-token",
"test-device-id", validation_results);
EXPECT_TRUE(validation_results.empty());
device_management_storage::CachedPolicyInfo updated_policy_info;
updated_policy_info.Populate(policy_map[policy_type]);
EXPECT_FALSE(updated_policy_info.public_key().empty());
dm_response = GetDefaultTestingPolicyFetchDMResponse(
true /* first_request */, false /* rotate_to_new_key */,
DMPolicyBuilderForTesting::SigningOption::kTamperKeySignature);
policy_map = ParsePolicyFetchResponse(dm_response->SerializeAsString(),
updated_policy_info, "test-dm-token",
"test-device-id", validation_results);
EXPECT_EQ(validation_results.size(), size_t{1});
EXPECT_EQ(validation_results[0].policy_type, policy_type);
EXPECT_EQ(
validation_results[0].status,
PolicyValidationResult::Status::kValidationBadKeyVerificationSignature);
EXPECT_TRUE(validation_results[0].issues.empty());
EXPECT_TRUE(policy_map.empty());
validation_results.clear();
// 4) Client should reject response if policy data is not signed properly.
dm_response = GetDefaultTestingPolicyFetchDMResponse(
true /* first_request */, false /* rotate_to_new_key */,
DMPolicyBuilderForTesting::SigningOption::kTamperDataSignature);
policy_map = ParsePolicyFetchResponse(dm_response->SerializeAsString(),
initial_policy_info, "test-dm-token",
"test-device-id", validation_results);
EXPECT_EQ(validation_results.size(), size_t{1});
EXPECT_EQ(validation_results[0].policy_type, policy_type);
EXPECT_EQ(validation_results[0].status,
PolicyValidationResult::Status::kValidationBadSignature);
EXPECT_TRUE(validation_results[0].issues.empty());
EXPECT_TRUE(policy_map.empty());
validation_results.clear();
}
} // namespace updater
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