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 {}
OnAcquireDataResponse(const AAFwk::WantParams & wantParams,int64_t requestCode)47 void OnAcquireDataResponse(const AAFwk::WantParams &wantParams, int64_t requestCode) override
48 {}
49 };
50
GetU32Data(const char * ptr)51 uint32_t GetU32Data(const char* ptr)
52 {
53 // 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
54 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3]);
55 }
56
DoSomethingInterestingWithMyAPI(const char * data,size_t size)57 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
58 {
59 uint32_t code = GetU32Data(data);
60 MessageParcel datas;
61 datas.WriteInterfaceToken(FORMMGR_INTERFACE_TOKEN);
62 datas.WriteBuffer(data, size);
63 datas.RewindRead(0);
64 MessageParcel reply;
65 MessageOption option;
66 std::shared_ptr<FormHostStub> formhoststub = std::make_shared<FormHostStubFuzzTest>();
67 formhoststub->OnRemoteRequest(code, datas, reply, option);
68 return true;
69 }
70 }
71
72 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)73 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
74 {
75 /* Run your code on data */
76 if (data == nullptr) {
77 return 0;
78 }
79
80 if (size < OHOS::U32_AT_SIZE) {
81 return 0;
82 }
83
84 /* Validate the length of size */
85 if (size == 0 || size > OHOS::FOO_MAX_LEN) {
86 return 0;
87 }
88
89 char* ch = (char *)malloc(size + 1);
90 if (ch == nullptr) {
91 return 0;
92 }
93
94 (void)memset_s(ch, size + 1, 0x00, size + 1);
95 if (memcpy_s(ch, size + 1, data, size) != EOK) {
96 free(ch);
97 ch = nullptr;
98 return 0;
99 }
100
101 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
102 free(ch);
103 ch = nullptr;
104 return 0;
105 }
106
107