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 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 ProviderConnectStubFuzzTest : public ProviderConnectStub {
33 public:
34 ProviderConnectStubFuzzTest() = default;
35 virtual ~ProviderConnectStubFuzzTest() = default;
OnAbilityConnectDone(const AppExecFwk::ElementName & element,const sptr<IRemoteObject> & remoteObject,int resultCode)36 void OnAbilityConnectDone(const AppExecFwk::ElementName &element,
37 const sptr<IRemoteObject> &remoteObject, int resultCode) override
38 {}
OnAbilityDisconnectDone(const AppExecFwk::ElementName & element,int resultCode)39 void OnAbilityDisconnectDone(const AppExecFwk::ElementName &element, int resultCode) override
40 {}
41 };
42
GetU32Data(const char * ptr)43 uint32_t GetU32Data(const char* ptr)
44 {
45 // 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
46 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3]);
47 }
48
DoSomethingInterestingWithMyAPI(const char * data,size_t size)49 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
50 {
51 uint32_t code = GetU32Data(data);
52 MessageParcel datas;
53 datas.WriteInterfaceToken(FORMMGR_INTERFACE_TOKEN);
54 datas.WriteBuffer(data, size);
55 datas.RewindRead(0);
56 MessageParcel reply;
57 MessageOption option;
58 std::shared_ptr<ProviderConnectStub> providerconnectstub = std::make_shared<ProviderConnectStubFuzzTest>();
59 providerconnectstub->OnRemoteRequest(code, datas, reply, option);
60 return true;
61 }
62 }
63
64 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)65 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
66 {
67 /* Run your code on data */
68 if (data == nullptr) {
69 return 0;
70 }
71
72 if (size < OHOS::U32_AT_SIZE) {
73 return 0;
74 }
75
76 /* Validate the length of size */
77 if (size == 0 || size > OHOS::FOO_MAX_LEN) {
78 return 0;
79 }
80
81 char* ch = static_cast<char*>(malloc(size + 1));
82 if (ch == nullptr) {
83 return 0;
84 }
85
86 (void)memset_s(ch, size + 1, 0x00, size + 1);
87 if (memcpy_s(ch, size + 1, data, size) != EOK) {
88 free(ch);
89 ch = nullptr;
90 return 0;
91 }
92
93 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
94 free(ch);
95 ch = nullptr;
96 return 0;
97 }
98
99