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 "formprovidercaller_fuzzer.h"
17  
18  #include <cstddef>
19  #include <cstdint>
20  
21  #define private public
22  #define protected public
23  #include "form_provider_caller.h"
24  #undef private
25  #undef protected
26  #include "securec.h"
27  
28  using namespace OHOS::AppExecFwk;
29  
30  namespace OHOS {
31  constexpr size_t FOO_MAX_LEN = 1024;
32  constexpr size_t U32_AT_SIZE = 4;
GetU32Data(const char * ptr)33  uint32_t GetU32Data(const char* ptr)
34  {
35      // convert fuzz input data to an integer
36      return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | ptr[3];
37  }
DoSomethingInterestingWithMyAPI(const char * data,size_t size)38  bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
39  {
40      sptr<IRemoteObject> callerToken = nullptr;
41      FormProviderCaller formProviderCaller(callerToken);
42      formProviderCaller.IsSameToken(callerToken);
43      FormJsInfo formJsInfo;
44      int64_t formId = 1;
45      formProviderCaller.GetFormJsInfo(formId, formJsInfo);
46      formProviderCaller.IsFormEmpty();
47      sptr<IRemoteObject> token = nullptr;
48      formProviderCaller.OnAcquire(formJsInfo, token);
49      FormProviderData formProviderData;
50      formProviderCaller.UpdateForm(formId, formProviderData);
51      formProviderCaller.UpdateForm(formJsInfo);
52      formProviderCaller.AddForm(formJsInfo);
53      formProviderCaller.DeleteForm(formId);
54      return formProviderCaller.HasForm(formId);
55  }
56  }
57  
58  /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)59  extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
60  {
61      /* Run your code on data */
62      if (data == nullptr) {
63          return 0;
64      }
65  
66      if (size < OHOS::U32_AT_SIZE) {
67          return 0;
68      }
69  
70      /* Validate the length of size */
71      if (size == 0 || size > OHOS::FOO_MAX_LEN) {
72          return 0;
73      }
74  
75      char* ch = static_cast<char*>(malloc(size + 1));
76      if (ch == nullptr) {
77          return 0;
78      }
79  
80      (void)memset_s(ch, size + 1, 0x00, size + 1);
81      if (memcpy_s(ch, size + 1, data, size) != EOK) {
82          free(ch);
83          ch = nullptr;
84          return 0;
85      }
86  
87      OHOS::DoSomethingInterestingWithMyAPI(ch, size);
88      free(ch);
89      ch = nullptr;
90      return 0;
91  }
92  
93