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 "sec_comp_log.h"
18
19 namespace OHOS {
20 namespace Security {
21 namespace SecurityComponent {
22 namespace {
23 static constexpr int32_t MAX_FUNC_ASM_SIZE = 0x250;
24 static constexpr OHOS::HiviewDFX::HiLogLabel LABEL = {
25 LOG_CORE, SECURITY_DOMAIN_SECURITY_COMPONENT, "SecCompCallerAuthorization"};
26 static constexpr size_t MAX_CALLER_SIZE = 10;
27 }
28
RegisterSecCompKitCaller(std::vector<uintptr_t> & callerList)29 void SecCompCallerAuthorization::RegisterSecCompKitCaller(std::vector<uintptr_t>& callerList)
30 {
31 if (isInit_) {
32 SC_LOG_ERROR(LABEL, "can not init repeatly");
33 return;
34 }
35
36 isInit_ = true;
37 if ((callerList.size() == 0) || (callerList.size() > MAX_CALLER_SIZE)) {
38 SC_LOG_ERROR(LABEL, "caller size is invalid");
39 return;
40 }
41
42 kitCallerList_ = callerList;
43 }
44
IsKitCaller(uintptr_t callerAddr)45 bool SecCompCallerAuthorization::IsKitCaller(uintptr_t callerAddr)
46 {
47 if (!isInit_) {
48 SC_LOG_INFO(LABEL, "caller authorization has not init");
49 return true;
50 }
51 for (size_t i = 0; i < kitCallerList_.size(); i++) {
52 if ((callerAddr > kitCallerList_[i]) && (callerAddr < kitCallerList_[i] + MAX_FUNC_ASM_SIZE)) {
53 return true;
54 }
55 }
56 return false;
57 }
58
GetInstance()59 SecCompCallerAuthorization& SecCompCallerAuthorization::GetInstance()
60 {
61 static SecCompCallerAuthorization instance;
62 return instance;
63 }
64 } // namespace SecurityComponent
65 } // namespace Security
66 } // namespace OHOS
67
68