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 "formsupplystub_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "form_supply_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
32 class FormSupplyStubFuzzTest : public FormSupplyStub {
33 public:
34 FormSupplyStubFuzzTest() = default;
35 virtual ~FormSupplyStubFuzzTest() = default;
OnAcquire(const FormProviderInfo & formInfo,const Want & want)36 int OnAcquire(const FormProviderInfo &formInfo, const Want &want) override
37 {
38 return 0;
39 }
OnEventHandle(const Want & want)40 int OnEventHandle(const Want &want) override
41 {
42 return 0;
43 }
OnAcquireStateResult(FormState state,const std::string & provider,const Want & wantArg,const Want & want)44 int OnAcquireStateResult(FormState state, const std::string &provider,
45 const Want &wantArg, const Want &want) override
46 {
47 return 0;
48 }
OnShareAcquire(int64_t formId,const std::string & remoteDeviceId,const AAFwk::WantParams & wantParams,int64_t requestCode,const bool & result)49 void OnShareAcquire(int64_t formId, const std::string &remoteDeviceId,
50 const AAFwk::WantParams &wantParams, int64_t requestCode, const bool &result) override
51 {}
OnRenderTaskDone(int64_t formId,const Want & want)52 int32_t OnRenderTaskDone(int64_t formId, const Want &want) override
53 {
54 return ERR_OK;
55 }
OnStopRenderingTaskDone(int64_t formId,const Want & want)56 int32_t OnStopRenderingTaskDone(int64_t formId, const Want &want) override
57 {
58 return ERR_OK;
59 }
OnAcquireDataResult(const AAFwk::WantParams & wantParams,int64_t requestCode)60 int OnAcquireDataResult(const AAFwk::WantParams &wantParams, int64_t requestCode) override
61 {
62 return ERR_OK;
63 }
64 };
65
Convert2Uint32(const char * ptr)66 uint32_t Convert2Uint32(const char* ptr)
67 {
68 // 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
69 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3]);
70 }
71
DoSomethingInterestingWithMyAPI(const char * data,size_t size)72 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
73 {
74 uint32_t code = Convert2Uint32(data);
75 MessageParcel datas;
76 datas.WriteInterfaceToken(FORMMGR_INTERFACE_TOKEN);
77 datas.WriteBuffer(data, size);
78 datas.RewindRead(0);
79 MessageParcel reply;
80 MessageOption option;
81 std::shared_ptr<FormSupplyStub> formsupplystub = std::make_shared<FormSupplyStubFuzzTest>();
82 formsupplystub->OnRemoteRequest(code, datas, reply, option);
83 return true;
84 }
85 }
86
87 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)88 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
89 {
90 /* Run your code on data */
91 if (data == nullptr) {
92 return 0;
93 }
94
95 if (size < OHOS::U32_AT_SIZE) {
96 return 0;
97 }
98
99 /* Validate the length of size */
100 if (size == 0 || size > OHOS::FOO_MAX_LEN) {
101 return 0;
102 }
103
104 char* ch = static_cast<char*>(malloc(size + 1));
105 if (ch == nullptr) {
106 return 0;
107 }
108
109 (void)memset_s(ch, size + 1, 0x00, size + 1);
110 if (memcpy_s(ch, size + 1, data, size) != EOK) {
111 free(ch);
112 ch = nullptr;
113 return 0;
114 }
115
116 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
117 free(ch);
118 ch = nullptr;
119 return 0;
120 }
121
122