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
16 #include "setmutepolicystub_fuzzer.h"
17
18 #include <string>
19 #include <thread>
20 #include <vector>
21
22 #include "accesstoken_fuzzdata.h"
23 #undef private
24 #include "accesstoken_kit.h"
25 #include "i_privacy_manager.h"
26 #include "privacy_manager_service.h"
27 #include "nativetoken_kit.h"
28 #include "token_setproc.h"
29
30 using namespace std;
31 using namespace OHOS::Security::AccessToken;
32 const int CONSTANTS_NUMBER_TWO = 2;
33 static const int32_t ROOT_UID = 0;
34
35 namespace OHOS {
36 const uint8_t *g_baseFuzzData = nullptr;
37 size_t g_baseFuzzSize = 0;
38 size_t g_baseFuzzPos = 0;
GetNativeToken()39 void GetNativeToken()
40 {
41 uint64_t tokenId;
42 const char **perms = new const char *[1];
43 perms[0] = "ohos.permission.GET_SENSITIVE_PERMISSIONS"; // 3 means the third permission
44
45 NativeTokenInfoParams infoInstance = {
46 .dcapsNum = 0,
47 .permsNum = 1,
48 .aclsNum = 0,
49 .dcaps = nullptr,
50 .perms = perms,
51 .acls = nullptr,
52 .processName = "getpermissionsstatusstub_fuzzer_test",
53 .aplStr = "system_core",
54 };
55
56 tokenId = GetAccessTokenId(&infoInstance);
57 SetSelfTokenID(tokenId);
58 AccessTokenKit::ReloadNativeTokenInfo();
59 delete[] perms;
60 }
61
SetMutePolicyStubFuzzTest(const uint8_t * data,size_t size)62 bool SetMutePolicyStubFuzzTest(const uint8_t* data, size_t size)
63 {
64 if ((data == nullptr) || (size == 0)) {
65 return false;
66 }
67 GetNativeToken();
68 AccessTokenFuzzData fuzzData(data, size);
69
70 if (size > sizeof(uint32_t) + sizeof(bool) + sizeof(uint32_t)) {
71 uint32_t policyType = fuzzData.GetData<uint32_t>();
72 uint32_t callerType = fuzzData.GetData<uint32_t>();
73 bool isMute = fuzzData.GenerateRandomBool();
74 uint32_t tokenID = fuzzData.GetData<uint32_t>();
75
76 MessageParcel datas;
77 datas.WriteInterfaceToken(IPrivacyManager::GetDescriptor());
78 if (!datas.WriteUint32(policyType)) {
79 return false;
80 }
81 if (!datas.WriteUint32(callerType)) {
82 return false;
83 }
84 if (!datas.WriteBool(isMute)) {
85 return false;
86 }
87 if (!datas.WriteUint32(tokenID)) {
88 return false;
89 }
90
91 uint32_t code = static_cast<uint32_t>(
92 PrivacyInterfaceCode::SET_MUTE_POLICY);
93
94 MessageParcel reply;
95 MessageOption option;
96 bool enable = ((size % CONSTANTS_NUMBER_TWO) == 0);
97 if (enable) {
98 setuid(CONSTANTS_NUMBER_TWO);
99 }
100 DelayedSingleton<PrivacyManagerService>::GetInstance()->OnRemoteRequest(code, datas, reply, option);
101 setuid(ROOT_UID);
102 }
103 return true;
104 }
105 } // namespace OHOS
106
107 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)108 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
109 {
110 /* Run your code on data */
111 OHOS::SetMutePolicyStubFuzzTest(data, size);
112 return 0;
113 }
114