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 "formhostcaller_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #define private public
22 #define protected public
23 #include "form_host_caller.h"
24 #include "form_js_info.h"
25 #include "form_provider_info.h"
26 #undef private
27 #undef protected
28 #include "securec.h"
29
30 using namespace OHOS::AppExecFwk;
31
32 namespace OHOS {
33 constexpr size_t FOO_MAX_LEN = 1024;
34 constexpr size_t U32_AT_SIZE = 4;
GetU32Data(const char * ptr)35 uint32_t GetU32Data(const char* ptr)
36 {
37 // convert fuzz input data to an integer
38 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | ptr[3];
39 }
DoSomethingInterestingWithMyAPI(const char * data,size_t size)40 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
41 {
42 FormJsInfo formJsInfo;
43 Parcel parcel;
44 formJsInfo.ReadImageData(parcel);
45 sptr<IRemoteObject> callerToken = nullptr;
46 FormHostCaller formHostCaller(formJsInfo, callerToken);
47 formHostCaller.IsSameToken(callerToken);
48 FormProviderInfo formProviderInfo;
49 std::string bundle(data, size);
50 sptr<FormAshmem> aa = nullptr;
51 int32_t bb = static_cast<int32_t>(GetU32Data(data));
52 std::map<std::string, std::pair<sptr<FormAshmem>, int32_t>> imageDataMap;
53 std::pair<sptr<FormAshmem>, int32_t> loadForm = std::make_pair(aa, bb);
54 imageDataMap.emplace(bundle, loadForm);
55 formProviderInfo.SetImageDataMap(imageDataMap);
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 return 0;
66 }
67
68 if (size < OHOS::U32_AT_SIZE) {
69 return 0;
70 }
71
72 /* Validate the length of size */
73 if (size == 0 || size > OHOS::FOO_MAX_LEN) {
74 return 0;
75 }
76
77 char* ch = static_cast<char*>(malloc(size + 1));
78 if (ch == nullptr) {
79 return 0;
80 }
81
82 (void)memset_s(ch, size + 1, 0x00, size + 1);
83 if (memcpy_s(ch, size + 1, data, size) != EOK) {
84 free(ch);
85 ch = nullptr;
86 return 0;
87 }
88
89 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
90 free(ch);
91 ch = nullptr;
92 return 0;
93 }
94
95