1 /*
2 * Copyright (c) 2021-2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include <condition_variable>
17 #include <cstdint>
18 #include <mutex>
19 #include "camera_app_manager_utils.h"
20 #include "camera_privacy.h"
21 #include "camera_log.h"
22 #include "hcamera_device.h"
23 #include "hcamera_device_manager.h"
24 #include "hcapture_session.h"
25 #include "hstream_operator.h"
26
27 namespace OHOS {
28 namespace CameraStandard {
29 using OHOS::Security::AccessToken::PrivacyKit;
30 using OHOS::Security::AccessToken::AccessTokenKit;
31
CastToSession(wptr<IStreamOperatorCallback> streamOpCb)32 sptr<HStreamOperator> CastToSession(wptr<IStreamOperatorCallback> streamOpCb)
33 {
34 CHECK_RETURN_RET_ELOG(streamOpCb == nullptr, nullptr, "streamOpCb is nullptr");
35 auto streamOpCbSptr = streamOpCb.promote();
36 CHECK_RETURN_RET_ELOG(streamOpCbSptr == nullptr, nullptr, "streamOpCbWptr is nullptr");
37
38 return static_cast<HStreamOperator*>(streamOpCbSptr.GetRefPtr());
39 }
40
PermStateChangeCallback(Security::AccessToken::PermStateChangeInfo & result)41 void PermissionStatusChangeCb::PermStateChangeCallback(Security::AccessToken::PermStateChangeInfo& result)
42 {
43 MEDIA_INFO_LOG("enter CameraUseStateChangeNotify permStateChangeType:%{public}d"
44 " permissionName:%{public}s", result.permStateChangeType, result.permissionName.c_str());
45 std::vector<sptr<HCameraDeviceHolder>> holders = HCameraDeviceManager::GetInstance()->GetActiveCameraHolders();
46 for (auto holder : holders) {
47 if (holder->GetAccessTokenId() != result.tokenID) {
48 MEDIA_INFO_LOG("PermissionStatusChangeCb::PermStateChangeCallback not current tokenId, checking continue");
49 continue;
50 }
51 auto device = holder->GetDevice();
52 if ((result.permStateChangeType == 0) && (device != nullptr)) {
53 auto session = CastToSession(device->GetStreamOperatorCallback());
54 if (session) {
55 session->ReleaseStreams();
56 session->StopMovingPhoto();
57 }
58 device->CloseDevice();
59 device->OnError(DEVICE_PREEMPT, 0);
60 }
61 }
62 }
63
StateChangeNotify(Security::AccessToken::AccessTokenID tokenId,bool isShowing)64 void CameraUseStateChangeCb::StateChangeNotify(Security::AccessToken::AccessTokenID tokenId, bool isShowing)
65 {
66 MEDIA_INFO_LOG("CameraUseStateChangeCb::StateChangeNotify is called, isShowing: %{public}d", isShowing);
67 std::vector<sptr<HCameraDeviceHolder>> holders = HCameraDeviceManager::GetInstance()->GetActiveCameraHolders();
68 for (auto holder : holders) {
69 if (holder->GetAccessTokenId() != tokenId) {
70 MEDIA_INFO_LOG("CameraUseStateChangeCb::StateChangeNotify not current tokenId, checking continue");
71 continue;
72 }
73 auto device = holder->GetDevice();
74 CHECK_RETURN_ELOG((isShowing == true) || (device == nullptr), "abnormal callback from privacy.");
75 auto cameraPrivacy = device->GetCameraPrivacy();
76 CHECK_RETURN_ELOG(cameraPrivacy == nullptr, "cameraPrivacy is nullptr.");
77 bool isSystemCamera = (cameraPrivacy->GetClientName().find(CAMERA_TAG) != std::string::npos)
78 && CheckSystemApp();
79 MEDIA_INFO_LOG("CameraUseStateChangeCb::StateChangeNotify ClientName: %{public}s, isSystemCamera: %{public}d",
80 cameraPrivacy->GetClientName().c_str(), isSystemCamera);
81 if (cameraPrivacy->WaitFor(isSystemCamera) == std::cv_status::timeout) {
82 MEDIA_INFO_LOG("CameraUseStateChangeCb::StateChangeNotify wait timeout");
83 bool isForeground = CameraAppManagerUtils::IsForegroundApplication(tokenId);
84 if ((isShowing == false) && (device != nullptr) && !isForeground) {
85 auto session = CastToSession(device->GetStreamOperatorCallback());
86 if (session) {
87 session->ReleaseStreams();
88 session->StopMovingPhoto();
89 }
90 device->CloseDevice();
91 }
92 }
93 }
94 }
95
~CameraPrivacy()96 CameraPrivacy::~CameraPrivacy()
97 {
98 cameraUseCallbackPtr_ = nullptr;
99 permissionCallbackPtr_ = nullptr;
100 }
101
IsAllowUsingCamera()102 bool CameraPrivacy::IsAllowUsingCamera()
103 {
104 return PrivacyKit::IsAllowedUsingPermission(callerToken_, OHOS_PERMISSION_CAMERA);
105 }
106
SetClientName(std::string clientName)107 void CameraPrivacy::SetClientName(std::string clientName)
108 {
109 clientName_ = clientName;
110 }
111
RegisterPermissionCallback()112 bool CameraPrivacy::RegisterPermissionCallback()
113 {
114 Security::AccessToken::PermStateChangeScope scopeInfo;
115 scopeInfo.permList = {OHOS_PERMISSION_CAMERA};
116 scopeInfo.tokenIDs = {callerToken_};
117 int32_t res;
118 {
119 std::lock_guard<std::mutex> lock(permissionCbMutex_);
120 permissionCallbackPtr_ = std::make_shared<PermissionStatusChangeCb>(scopeInfo);
121 res = AccessTokenKit::RegisterPermStateChangeCallback(permissionCallbackPtr_);
122 }
123 MEDIA_INFO_LOG("CameraPrivacy::RegisterPermissionCallback res:%{public}d", res);
124 CHECK_PRINT_ELOG(res != CAMERA_OK, "RegisterPermissionCallback failed.");
125 return res == CAMERA_OK;
126 }
127
UnregisterPermissionCallback()128 void CameraPrivacy::UnregisterPermissionCallback()
129 {
130 std::lock_guard<std::mutex> lock(permissionCbMutex_);
131 CHECK_RETURN_ELOG(permissionCallbackPtr_ == nullptr, "permissionCallbackPtr_ is null.");
132 MEDIA_DEBUG_LOG("UnregisterPermissionCallback unregister");
133 int32_t res = AccessTokenKit::UnRegisterPermStateChangeCallback(permissionCallbackPtr_);
134 MEDIA_INFO_LOG("CameraPrivacy::UnregisterPermissionCallback res:%{public}d", res);
135 CHECK_PRINT_ELOG(res != CAMERA_OK, "UnregisterPermissionCallback failed.");
136 permissionCallbackPtr_ = nullptr;
137 }
138
AddCameraPermissionUsedRecord()139 bool CameraPrivacy::AddCameraPermissionUsedRecord()
140 {
141 int32_t successCout = 1;
142 int32_t failCount = 0;
143 int32_t res = PrivacyKit::AddPermissionUsedRecord(callerToken_, OHOS_PERMISSION_CAMERA, successCout, failCount);
144 MEDIA_INFO_LOG("CameraPrivacy::AddCameraPermissionUsedRecord res:%{public}d", res);
145 CHECK_PRINT_ELOG(res != CAMERA_OK, "AddCameraPermissionUsedRecord failed.");
146 return res == CAMERA_OK;
147 }
148
StartUsingPermissionCallback()149 bool CameraPrivacy::StartUsingPermissionCallback()
150 {
151 int32_t res;
152 {
153 std::lock_guard<std::mutex> lock(cameraUseCbMutex_);
154 CHECK_RETURN_RET_ELOG(cameraUseCallbackPtr_, true, "has StartUsingPermissionCallback!");
155 cameraUseCallbackPtr_ = std::make_shared<CameraUseStateChangeCb>();
156 res = PrivacyKit::StartUsingPermission(callerToken_, OHOS_PERMISSION_CAMERA, cameraUseCallbackPtr_, pid_);
157 }
158 MEDIA_INFO_LOG("CameraPrivacy::StartUsingPermissionCallback res:%{public}d", res);
159 bool ret = (res == CAMERA_OK || res == Security::AccessToken::ERR_EDM_POLICY_CHECK_FAILED ||
160 res == Security::AccessToken::ERR_PRIVACY_POLICY_CHECK_FAILED);
161 CHECK_PRINT_ELOG(!ret, "StartUsingPermissionCallback failed.");
162 return ret;
163 }
164
StopUsingPermissionCallback()165 void CameraPrivacy::StopUsingPermissionCallback()
166 {
167 MEDIA_INFO_LOG("CameraPrivacy::StopUsingPermissionCallback is called, pid_: %{public}d", pid_);
168 {
169 std::lock_guard<std::mutex> lock(cameraUseCbMutex_);
170 int32_t res = PrivacyKit::StopUsingPermission(callerToken_, OHOS_PERMISSION_CAMERA);
171 MEDIA_INFO_LOG("CameraPrivacy::StopUsingPermissionCallback res:%{public}d", res);
172 CHECK_PRINT_ELOG(res != CAMERA_OK, "StopUsingPermissionCallback failed.");
173 cameraUseCallbackPtr_ = nullptr;
174 }
175 Notify();
176 }
177 } // namespace CameraStandard
178 } // namespace OHOS