1 /*
2 * Copyright (c) 2023 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 #include "sec_comp_caller_authorization.h"
16
17 #include <mutex>
18 #include "sec_comp_log.h"
19
20 namespace OHOS {
21 namespace Security {
22 namespace SecurityComponent {
23 namespace {
24 static constexpr int32_t MAX_FUNC_ASM_SIZE = 0x380;
25 static constexpr OHOS::HiviewDFX::HiLogLabel LABEL = {
26 LOG_CORE, SECURITY_DOMAIN_SECURITY_COMPONENT, "SecCompCallerAuthorization"};
27 static constexpr size_t MAX_CALLER_SIZE = 10;
28 static std::mutex g_instanceMutex;
29 }
30
RegisterSecCompKitCaller(std::vector<uintptr_t> & callerList)31 void SecCompCallerAuthorization::RegisterSecCompKitCaller(std::vector<uintptr_t>& callerList)
32 {
33 if (isInit_) {
34 SC_LOG_ERROR(LABEL, "can not init repeatly");
35 return;
36 }
37
38 isInit_ = true;
39 if ((callerList.size() == 0) || (callerList.size() > MAX_CALLER_SIZE)) {
40 SC_LOG_ERROR(LABEL, "caller size is invalid");
41 return;
42 }
43
44 kitCallerList_ = callerList;
45 }
46
IsKitCaller(uintptr_t callerAddr)47 bool SecCompCallerAuthorization::IsKitCaller(uintptr_t callerAddr)
48 {
49 if (!isInit_) {
50 SC_LOG_INFO(LABEL, "caller authorization has not init");
51 return true;
52 }
53 for (size_t i = 0; i < kitCallerList_.size(); i++) {
54 if ((callerAddr > kitCallerList_[i]) && (callerAddr < kitCallerList_[i] + MAX_FUNC_ASM_SIZE)) {
55 return true;
56 }
57 }
58 return false;
59 }
60
GetInstance()61 SecCompCallerAuthorization& SecCompCallerAuthorization::GetInstance()
62 {
63 static SecCompCallerAuthorization* instance = nullptr;
64 if (instance == nullptr) {
65 std::lock_guard<std::mutex> lock(g_instanceMutex);
66 if (instance == nullptr) {
67 instance = new SecCompCallerAuthorization();
68 }
69 }
70 return *instance;
71 }
72 } // namespace SecurityComponent
73 } // namespace Security
74 } // namespace OHOS
75
76