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 "formhoststub_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "form_host_stub.h"
22 #include "message_parcel.h"
23 #include "securec.h"
24
25 using namespace OHOS::AppExecFwk;
26
27 namespace OHOS {
28 constexpr size_t FOO_MAX_LEN = 1024;
29 constexpr size_t U32_AT_SIZE = 4;
30 const std::u16string FORMMGR_INTERFACE_TOKEN = u"ohos.appexecfwk.FormMgr";
31 class FormHostStubFuzzTest : public FormHostStub {
32 public:
33 FormHostStubFuzzTest() = default;
34 virtual ~FormHostStubFuzzTest() = default;
OnAcquired(const FormJsInfo & formInfo,const sptr<IRemoteObject> & token)35 void OnAcquired(const FormJsInfo &formInfo, const sptr<IRemoteObject> &token) override
36 {}
OnUpdate(const FormJsInfo & formInfo)37 void OnUpdate(const FormJsInfo &formInfo) override
38 {}
OnUninstall(const std::vector<int64_t> & formIds)39 void OnUninstall(const std::vector<int64_t> &formIds) override
40 {}
OnAcquireState(AppExecFwk::FormState state,const AAFwk::Want & want)41 void OnAcquireState(AppExecFwk::FormState state, const AAFwk::Want &want) override
42 {}
OnShareFormResponse(int64_t requestCode,int32_t result)43 void OnShareFormResponse(int64_t requestCode, int32_t result) override
44 {}
OnError(int32_t errorCode,const std::string & errorMsg)45 void OnError(int32_t errorCode, const std::string &errorMsg) override
46 {}
47 };
48
GetU32Data(const char * ptr)49 uint32_t GetU32Data(const char* ptr)
50 {
51 // 将第0个数字左移24位，将第1个数字左移16位，将第2个数字左移8位，第3个数字不左移
52 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3]);
53 }
54
DoSomethingInterestingWithMyAPI(const char * data,size_t size)55 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
56 {
57 uint32_t code = GetU32Data(data);
58 MessageParcel datas;
59 datas.WriteInterfaceToken(FORMMGR_INTERFACE_TOKEN);
60 datas.WriteBuffer(data, size);
61 datas.RewindRead(0);
62 MessageParcel reply;
63 MessageOption option;
64 std::shared_ptr<FormHostStub> formhoststub = std::make_shared<FormHostStubFuzzTest>();
65 formhoststub->OnRemoteRequest(code, datas, reply, option);
66 return true;
67 }
68 }
69
70 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)71 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
72 {
73 /* Run your code on data */
74 if (data == nullptr) {
75 return 0;
76 }
77
78 if (size < OHOS::U32_AT_SIZE) {
79 return 0;
80 }
81
82 /* Validate the length of size */
83 if (size == 0 || size > OHOS::FOO_MAX_LEN) {
84 return 0;
85 }
86
87 char* ch = (char *)malloc(size + 1);
88 if (ch == nullptr) {
89 return 0;
90 }
91
92 (void)memset_s(ch, size + 1, 0x00, size + 1);
93 if (memcpy_s(ch, size, data, size) != EOK) {
94 free(ch);
95 ch = nullptr;
96 return 0;
97 }
98
99 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
100 free(ch);
101 ch = nullptr;
102 return 0;
103 }
104
105