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 "appmanager_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "app_mgr_service.h"
22 #include "message_parcel.h"
23 #include "securec.h"
24
25 using namespace OHOS::AAFwk;
26 using namespace OHOS::AppExecFwk;
27
28 #define DISABLE_FUZZ
29
30 namespace OHOS {
31 namespace {
32 constexpr size_t FOO_MAX_LEN = 1024;
33 constexpr size_t U32_AT_SIZE = 4;
34 const std::u16string APPMGR_INTERFACE_TOKEN = u"ohos.appexecfwk.AppMgr";
35 }
36
GetU32Data(const char * ptr)37 uint32_t GetU32Data(const char* ptr)
38 {
39 // convert fuzz input data to an integer
40 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | ptr[3];
41 }
42
DoSomethingInterestingWithMyAPI(const char * data,size_t size)43 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
44 {
45 uint32_t code = GetU32Data(data);
46
47 MessageParcel parcel;
48 parcel.WriteInterfaceToken(APPMGR_INTERFACE_TOKEN);
49 parcel.WriteBuffer(data, size);
50 parcel.RewindRead(0);
51 MessageParcel reply;
52 MessageOption option;
53 sptr<AppMgrService> appMgr = new AppMgrService();
54 appMgr->OnRemoteRequest(code, parcel, reply, option);
55
56 return true;
57 }
58 }
59
60 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)61 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
62 {
63 /* Run your code on data */
64 if (data == nullptr) {
65 std::cout << "invalid data" << std::endl;
66 return 0;
67 }
68
69 /* Validate the length of size */
70 if (size > OHOS::FOO_MAX_LEN || size < OHOS::U32_AT_SIZE) {
71 return 0;
72 }
73
74 char* ch = (char *)malloc(size + 1);
75 if (ch == nullptr) {
76 std::cout << "malloc failed." << std::endl;
77 return 0;
78 }
79
80 (void)memset_s(ch, size + 1, 0x00, size + 1);
81 if (memcpy_s(ch, size, data, size) != EOK) {
82 std::cout << "copy failed." << std::endl;
83 free(ch);
84 ch = nullptr;
85 return 0;
86 }
87 #ifndef DISABLE_FUZZ
88 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
89 #endif
90 free(ch);
91 ch = nullptr;
92 return 0;
93 }
94
95