1 /*
2 * Copyright (c) 2023 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 "formrenderstub_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #define private public
22 #define protected public
23 #include "form_render_stub.h"
24 #undef private
25 #undef protected
26 #include "message_parcel.h"
27 #include "securec.h"
28
29 using namespace OHOS::AppExecFwk;
30
31 namespace OHOS {
32 constexpr size_t FOO_MAX_LEN = 1024;
33 constexpr size_t U32_AT_SIZE = 4;
34 const std::u16string FORMMGR_INTERFACE_TOKEN = u"ohos.appexecfwk.FormRender";
35
36 class FormRenderStubFuzzTest : public FormRenderStub {
37 public:
38 FormRenderStubFuzzTest() = default;
39 virtual ~FormRenderStubFuzzTest() = default;
RenderForm(const FormJsInfo & formJsInfo,const Want & want,sptr<IRemoteObject> callerToken)40 int32_t RenderForm(const FormJsInfo &formJsInfo, const Want &want,
41 sptr<IRemoteObject> callerToken) override
42 {
43 return 0;
44 }
45
StopRenderingForm(const FormJsInfo & formJsInfo,const Want & want,const sptr<IRemoteObject> & callerToken)46 int32_t StopRenderingForm(
47 const FormJsInfo &formJsInfo, const Want &want, const sptr<IRemoteObject> &callerToken) override
48 {
49 return 0;
50 }
51
CleanFormHost(const sptr<IRemoteObject> & hostToken)52 int32_t CleanFormHost(const sptr<IRemoteObject> &hostToken) override
53 {
54 return 0;
55 }
56
ReloadForm(const std::vector<FormJsInfo> && formJsInfos,const Want & want)57 int32_t ReloadForm(const std::vector<FormJsInfo> &&formJsInfos, const Want &want) override
58 {
59 return 0;
60 }
61 };
62
GetU32Data(const char * ptr)63 uint32_t GetU32Data(const char* ptr)
64 {
65 if (ptr == nullptr) {
66 return 0;
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 = GetU32Data(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<FormRenderStub> formRenderStub = std::make_shared<FormRenderStubFuzzTest>();
82 formRenderStub->OnRemoteRequest(code, datas, reply, option);
83 formRenderStub->HandleRenderForm(datas, reply);
84 formRenderStub->HandleCleanFormHost(datas, reply);
85 formRenderStub->HandleReloadForm(datas, reply);
86 formRenderStub->HandleStopRenderingForm(datas, reply);
87 formRenderStub->HandleOnUnlock(datas, reply);
88 formRenderStub->HandleSetVisibleChange(datas, reply);
89 formRenderStub->HandleRecoverForm(datas, reply);
90 return true;
91 }
92 }
93
94 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)95 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
96 {
97 /* Run your code on data */
98 if (data == nullptr) {
99 return 0;
100 }
101
102 if (size < OHOS::U32_AT_SIZE) {
103 return 0;
104 }
105
106 /* Validate the length of size */
107 if (size == 0 || size > OHOS::FOO_MAX_LEN) {
108 return 0;
109 }
110
111 char* ch = static_cast<char*>(malloc(size + 1));
112 if (ch == nullptr) {
113 return 0;
114 }
115
116 (void)memset_s(ch, size + 1, 0x00, size + 1);
117 if (memcpy_s(ch, size + 1, data, size) != EOK) {
118 free(ch);
119 ch = nullptr;
120 return 0;
121 }
122
123 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
124 free(ch);
125 ch = nullptr;
126 return 0;
127 }
128
129