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 "providerconnectproxy_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #define private public
22 #define protected public
23 #include "provider_connect_proxy.h"
24 #undef private
25 #undef protected
26 #include "securec.h"
27
28 using namespace OHOS::AppExecFwk;
29
30 namespace OHOS {
31 constexpr size_t FOO_MAX_LEN = 1024;
32 constexpr size_t U32_AT_SIZE = 4;
GetU32Data(const char * ptr)33 uint32_t GetU32Data(const char* ptr)
34 {
35 // convert fuzz input data to an integer
36 return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | ptr[3];
37 }
DoSomethingInterestingWithMyAPI(const char * data,size_t size)38 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
39 {
40 sptr<IRemoteObject> impl = nullptr;
41 ProviderConnectProxy providerConnectProxy(impl);
42 MessageParcel datas;
43 return providerConnectProxy.WriteInterfaceToken(datas);
44 }
45 }
46
47 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)48 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
49 {
50 /* Run your code on data */
51 if (data == nullptr) {
52 return 0;
53 }
54
55 if (size < OHOS::U32_AT_SIZE) {
56 return 0;
57 }
58
59 /* Validate the length of size */
60 if (size == 0 || size > OHOS::FOO_MAX_LEN) {
61 return 0;
62 }
63
64 char* ch = static_cast<char*>(malloc(size + 1));
65 if (ch == nullptr) {
66 return 0;
67 }
68
69 (void)memset_s(ch, size + 1, 0x00, size + 1);
70 if (memcpy_s(ch, size + 1, data, size) != EOK) {
71 free(ch);
72 ch = nullptr;
73 return 0;
74 }
75
76 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
77 free(ch);
78 ch = nullptr;
79 return 0;
80 }
81
82