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 "providerconnectstub_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "provider_connect_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 U32_AT_SIZE = 4;
29 const std::u16string FORMMGR_INTERFACE_TOKEN = u"ohos.appexecfwk.FormMgr";
30
31 class ProviderConnectStubFuzzTest : public ProviderConnectStub {
32 public:
33 ProviderConnectStubFuzzTest() = default;
34 virtual ~ProviderConnectStubFuzzTest() = default;
OnAbilityConnectDone(const AppExecFwk::ElementName & element,const sptr<IRemoteObject> & remoteObject,int resultCode)35 void OnAbilityConnectDone(const AppExecFwk::ElementName &element,
36 const sptr<IRemoteObject> &remoteObject, int resultCode) override
37 {}
OnAbilityDisconnectDone(const AppExecFwk::ElementName & element,int resultCode)38 void OnAbilityDisconnectDone(const AppExecFwk::ElementName &element, int resultCode) override
39 {}
40 };
41
GetU32Data(const char * ptr)42 uint32_t GetU32Data(const char* ptr)
43 {
44 // 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
45 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3]);
46 }
47
DoSomethingInterestingWithMyAPI(const char * data,size_t size)48 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
49 {
50 uint32_t code = GetU32Data(data);
51 MessageParcel datas;
52 datas.WriteInterfaceToken(FORMMGR_INTERFACE_TOKEN);
53 datas.WriteBuffer(data, size);
54 datas.RewindRead(0);
55 MessageParcel reply;
56 MessageOption option;
57 std::shared_ptr<ProviderConnectStub> providerconnectstub = std::make_shared<ProviderConnectStubFuzzTest>();
58 providerconnectstub->OnRemoteRequest(code, datas, reply, option);
59 return true;
60 }
61 }
62
63 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)64 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
65 {
66 /* Run your code on data */
67 if (data == nullptr) {
68 return 0;
69 }
70
71 if (size < OHOS::U32_AT_SIZE) {
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