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_ERROR_RETURN_RET_LOG(streamOpCb == nullptr, nullptr, "streamOpCb is nullptr");
35 auto streamOpCbSptr = streamOpCb.promote();
36 CHECK_ERROR_RETURN_RET_LOG(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_ERROR_RETURN_LOG((isShowing == true) || (device == nullptr), "abnormal callback from privacy.");
75 auto cameraPrivacy = device->GetCameraPrivacy();
76 CHECK_ERROR_RETURN_LOG(cameraPrivacy == nullptr, "cameraPrivacy is nullptr.");
77 if (cameraPrivacy->WaitFor() == std::cv_status::timeout) {
78 MEDIA_INFO_LOG("CameraUseStateChangeCb::StateChangeNotify wait timeout");
79 bool isForeground = CameraAppManagerUtils::IsForegroundApplication(tokenId);
80 if ((isShowing == false) && (device != nullptr) && !isForeground) {
81 auto session = CastToSession(device->GetStreamOperatorCallback());
82 if (session) {
83 session->ReleaseStreams();
84 session->StopMovingPhoto();
85 }
86 device->CloseDevice();
87 }
88 }
89 }
90 }
91
~CameraPrivacy()92 CameraPrivacy::~CameraPrivacy()
93 {
94 cameraUseCallbackPtr_ = nullptr;
95 permissionCallbackPtr_ = nullptr;
96 }
97
IsAllowUsingCamera()98 bool CameraPrivacy::IsAllowUsingCamera()
99 {
100 return PrivacyKit::IsAllowedUsingPermission(callerToken_, OHOS_PERMISSION_CAMERA);
101 }
102
RegisterPermissionCallback()103 bool CameraPrivacy::RegisterPermissionCallback()
104 {
105 Security::AccessToken::PermStateChangeScope scopeInfo;
106 scopeInfo.permList = {OHOS_PERMISSION_CAMERA};
107 scopeInfo.tokenIDs = {callerToken_};
108 int32_t res;
109 {
110 std::lock_guard<std::mutex> lock(permissionCbMutex_);
111 permissionCallbackPtr_ = std::make_shared<PermissionStatusChangeCb>(scopeInfo);
112 res = AccessTokenKit::RegisterPermStateChangeCallback(permissionCallbackPtr_);
113 }
114 MEDIA_INFO_LOG("CameraPrivacy::RegisterPermissionCallback res:%{public}d", res);
115 CHECK_ERROR_PRINT_LOG(res != CAMERA_OK, "RegisterPermissionCallback failed.");
116 return res == CAMERA_OK;
117 }
118
UnregisterPermissionCallback()119 void CameraPrivacy::UnregisterPermissionCallback()
120 {
121 std::lock_guard<std::mutex> lock(permissionCbMutex_);
122 CHECK_ERROR_RETURN_LOG(permissionCallbackPtr_ == nullptr, "permissionCallbackPtr_ is null.");
123 MEDIA_DEBUG_LOG("UnregisterPermissionCallback unregister");
124 int32_t res = AccessTokenKit::UnRegisterPermStateChangeCallback(permissionCallbackPtr_);
125 MEDIA_INFO_LOG("CameraPrivacy::UnregisterPermissionCallback res:%{public}d", res);
126 CHECK_ERROR_PRINT_LOG(res != CAMERA_OK, "UnregisterPermissionCallback failed.");
127 permissionCallbackPtr_ = nullptr;
128 }
129
AddCameraPermissionUsedRecord()130 bool CameraPrivacy::AddCameraPermissionUsedRecord()
131 {
132 int32_t successCout = 1;
133 int32_t failCount = 0;
134 int32_t res = PrivacyKit::AddPermissionUsedRecord(callerToken_, OHOS_PERMISSION_CAMERA, successCout, failCount);
135 MEDIA_INFO_LOG("CameraPrivacy::AddCameraPermissionUsedRecord res:%{public}d", res);
136 CHECK_ERROR_PRINT_LOG(res != CAMERA_OK, "AddCameraPermissionUsedRecord failed.");
137 return res == CAMERA_OK;
138 }
139
StartUsingPermissionCallback()140 bool CameraPrivacy::StartUsingPermissionCallback()
141 {
142 int32_t res;
143 {
144 std::lock_guard<std::mutex> lock(cameraUseCbMutex_);
145 CHECK_ERROR_RETURN_RET_LOG(cameraUseCallbackPtr_, true, "has StartUsingPermissionCallback!");
146 cameraUseCallbackPtr_ = std::make_shared<CameraUseStateChangeCb>();
147 res = PrivacyKit::StartUsingPermission(callerToken_, OHOS_PERMISSION_CAMERA, cameraUseCallbackPtr_, pid_);
148 }
149 MEDIA_INFO_LOG("CameraPrivacy::StartUsingPermissionCallback res:%{public}d", res);
150 bool ret = (res == CAMERA_OK || res == Security::AccessToken::ERR_EDM_POLICY_CHECK_FAILED ||
151 res == Security::AccessToken::ERR_PRIVACY_POLICY_CHECK_FAILED);
152 CHECK_ERROR_PRINT_LOG(!ret, "StartUsingPermissionCallback failed.");
153 return ret;
154 }
155
StopUsingPermissionCallback()156 void CameraPrivacy::StopUsingPermissionCallback()
157 {
158 MEDIA_INFO_LOG("CameraPrivacy::StopUsingPermissionCallback is called, pid_: %{public}d", pid_);
159 {
160 std::lock_guard<std::mutex> lock(cameraUseCbMutex_);
161 int32_t res = PrivacyKit::StopUsingPermission(callerToken_, OHOS_PERMISSION_CAMERA, pid_);
162 MEDIA_INFO_LOG("CameraPrivacy::StopUsingPermissionCallback res:%{public}d", res);
163 CHECK_ERROR_PRINT_LOG(res != CAMERA_OK, "StopUsingPermissionCallback failed.");
164 cameraUseCallbackPtr_ = nullptr;
165 }
166 Notify();
167 }
168 } // namespace CameraStandard
169 } // namespace OHOS