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 "bundleinstallerhost_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20 #include "bundle_installer_host.h"
21 #include "bundle_mgr_service.h"
22 #include "message_parcel.h"
23 #include "securec.h"
24
25 using namespace OHOS::AppExecFwk;
26 namespace OHOS {
27 constexpr size_t FOO_MAX_LEN = 1024;
28 constexpr size_t U32_AT_SIZE = 4;
29 constexpr size_t MESSAGE_SIZE = 10;
30
GetU32Data(const char * ptr)31 uint32_t GetU32Data(const char* ptr)
32 {
33 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3]);
34 }
35
DoSomethingInterestingWithMyAPI(const char * data,size_t size)36 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
37 {
38 #ifdef ON_64BIT_SYSTEM
39 uint32_t code = (GetU32Data(data) % MESSAGE_SIZE);
40 MessageParcel datas;
41 std::u16string descriptor = BundleInstallerHost::GetDescriptor();
42 datas.WriteInterfaceToken(descriptor);
43 datas.WriteBuffer(data, size);
44 datas.RewindRead(0);
45 MessageParcel reply;
46 MessageOption option;
47 BundleInstallerHost installerHost;
48 DelayedSingleton<BundleMgrService>::GetInstance()->OnStop();
49 installerHost.OnRemoteRequest(code, datas, reply, option);
50 #endif
51 return true;
52 }
53 }
54
55 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)56 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
57 {
58 /* Run your code on data */
59 if (data == nullptr) {
60 return 0;
61 }
62
63 if (size < OHOS::U32_AT_SIZE) {
64 return 0;
65 }
66
67 /* Validate the length of size */
68 if (size > OHOS::FOO_MAX_LEN) {
69 return 0;
70 }
71
72 char* ch = static_cast<char*>(malloc(size + 1));
73 if (ch == nullptr) {
74 return 0;
75 }
76
77 (void)memset_s(ch, size + 1, 0x00, size + 1);
78 if (memcpy_s(ch, size, data, size) != EOK) {
79 free(ch);
80 ch = nullptr;
81 return 0;
82 }
83
84 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
85 free(ch);
86 ch = nullptr;
87 return 0;
88 }