1 /*
2 * Copyright (c) 2024 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 "formhostdelegatestub_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "form_host_delegate_stub.h"
22 #include "securec.h"
23
24 using namespace OHOS::AppExecFwk;
25
26 namespace OHOS {
27 constexpr size_t U32_AT_SIZE = 4;
28 const std::u16string FORMMGR_INTERFACE_TOKEN = u"ohos.appexecfwk.FormMgr";
29 class FormHostDelegateStubFuzzTest : public FormHostDelegateStub {
30 public:
31 FormHostDelegateStubFuzzTest() = default;
32 virtual ~FormHostDelegateStubFuzzTest() = default;
RouterEvent(const int64_t formId,const Want & want)33 int32_t RouterEvent(const int64_t formId, const Want &want) override
34 {
35 return 0;
36 }
37 };
GetU32Data(const char * ptr)38 uint32_t GetU32Data(const char* ptr)
39 {
40 // convert fuzz input data to an integer
41 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | ptr[3];
42 }
DoSomethingInterestingWithMyAPI(const char * data,size_t size)43 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
44 {
45 FormHostDelegateStubFuzzTest formHostDelegateStub;
46 uint32_t code = GetU32Data(data);
47 MessageParcel datas;
48 datas.WriteInterfaceToken(FORMMGR_INTERFACE_TOKEN);
49 datas.WriteBuffer(data, size);
50 datas.RewindRead(0);
51 MessageParcel reply;
52 MessageOption option;
53 formHostDelegateStub.OnRemoteRequest(code, datas, reply, option);
54 formHostDelegateStub.HandleRouterEvent(datas, reply);
55 return true;
56 }
57 }
58
59 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)60 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
61 {
62 /* Run your code on data */
63 if (data == nullptr) {
64 return 0;
65 }
66
67 if (size < OHOS::U32_AT_SIZE) {
68 return 0;
69 }
70
71 char* ch = static_cast<char*>(malloc(size + 1));
72 if (ch == nullptr) {
73 return 0;
74 }
75
76 (void)memset_s(ch, size + 1, 0x00, size + 1);
77 if (memcpy_s(ch, size + 1, data, size) != EOK) {
78 free(ch);
79 ch = nullptr;
80 return 0;
81 }
82
83 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
84 free(ch);
85 ch = nullptr;
86 return 0;
87 }
88
89