1 /*
2 * Copyright (c) 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 "timeservice_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20 #include <string_ex.h>
21
22 #include "accesstoken_kit.h"
23 #include "nativetoken_kit.h"
24 #include "token_setproc.h"
25 #include "time_system_ability.h"
26 #include "message_parcel.h"
27
28 using namespace OHOS::MiscServices;
29
30 namespace OHOS {
31 constexpr size_t THRESHOLD = 10;
32 const std::u16string TIMESERVICE_INTERFACE_TOKEN = u"ohos.miscservices.time.ITimeService";
33
34 using namespace OHOS::Security::AccessToken;
35
GrantNativePermission()36 void GrantNativePermission()
37 {
38 const char **perms = new const char *[2];
39 perms[0] = "ohos.permission.SET_TIME";
40 perms[1] = "ohos.permission.SET_TIME_ZONE";
41 TokenInfoParams infoInstance = {
42 .dcapsNum = 0,
43 .permsNum = 2,
44 .aclsNum = 0,
45 .dcaps = nullptr,
46 .perms = perms,
47 .acls = nullptr,
48 .processName = "time_service",
49 .aplStr = "system_core",
50 };
51 uint64_t tokenId = GetAccessTokenId(&infoInstance);
52 SetSelfTokenID(tokenId);
53 AccessTokenKit::ReloadNativeTokenInfo();
54 delete[] perms;
55 }
56
FuzzTimeService(const uint8_t * rawData,size_t size)57 bool FuzzTimeService(const uint8_t* rawData, size_t size)
58 {
59 uint32_t code = (*rawData) % 10 + 1;
60
61 MessageParcel data;
62 data.WriteInterfaceToken(TIMESERVICE_INTERFACE_TOKEN);
63 data.WriteBuffer(rawData, size);
64 data.RewindRead(0);
65 MessageParcel reply;
66 MessageOption option;
67
68 sptr<TimeSystemAbility> mTimess = new TimeSystemAbility();
69 mTimess->OnRemoteRequest(code, data, reply, option);
70
71 return true;
72 }
73
FuzzTimeDump(const uint8_t * rawData,size_t size)74 bool FuzzTimeDump(const uint8_t *rawData, size_t size)
75 {
76 std::vector<std::u16string> args;
77 std::string str(reinterpret_cast<const char *>(rawData), size);
78 args.push_back(Str8ToStr16(str));
79 int fd = 0;
80 TimeSystemAbility::GetInstance()->Dump(fd, args);
81 return true;
82 }
83 }
84 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)85 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
86 {
87 if (size < OHOS::THRESHOLD) {
88 return 0;
89 }
90 /* Run your code on data */
91 OHOS::FuzzTimeService(data, size);
92 OHOS::FuzzTimeDump(data, size);
93 return 0;
94 }