1 /*
2 * Copyright (c) 2024 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 "verifymanagerhost_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "verify_manager_host.h"
22 #include "securec.h"
23
24 using namespace OHOS::AppExecFwk;
25 namespace OHOS {
26 constexpr size_t FOO_MAX_LEN = 1024;
27 constexpr size_t U32_AT_SIZE = 4;
28 constexpr size_t MESSAGE_SIZE = 3;
29 constexpr size_t DCAMERA_SHIFT_24 = 24;
30 constexpr size_t DCAMERA_SHIFT_16 = 16;
31 constexpr size_t DCAMERA_SHIFT_8 = 8;
32
GetU32Data(const char * ptr)33 uint32_t GetU32Data(const char* ptr)
34 {
35 return (ptr[0] << DCAMERA_SHIFT_24) | (ptr[1] << DCAMERA_SHIFT_16) | (ptr[2] << DCAMERA_SHIFT_8) | (ptr[3]);
36 }
DoSomethingInterestingWithMyAPI(const char * data,size_t size)37 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
38 {
39 uint32_t code = (GetU32Data(data) % MESSAGE_SIZE);
40 MessageParcel datas;
41 std::u16string descriptor = VerifyManagerHost::GetDescriptor();
42 datas.WriteInterfaceToken(descriptor);
43 datas.WriteBuffer(data, size);
44 datas.RewindRead(0);
45 MessageParcel reply;
46 MessageOption option;
47 VerifyManagerHost verifyManagerHost;
48 verifyManagerHost.OnRemoteRequest(code, datas, reply, option);
49 return true;
50 }
51 }
52
53 // Fuzzer entry point.
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)54 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
55 {
56 /* Run your code on data */
57 if (data == nullptr) {
58 return 0;
59 }
60
61 if (size < OHOS::U32_AT_SIZE) {
62 return 0;
63 }
64
65 /* Validate the length of size */
66 if (size > OHOS::FOO_MAX_LEN) {
67 return 0;
68 }
69
70 char* ch = static_cast<char*>(malloc(size + 1));
71 if (ch == nullptr) {
72 return 0;
73 }
74
75 (void)memset_s(ch, size + 1, 0x00, size + 1);
76 if (memcpy_s(ch, size, data, size) != EOK) {
77 free(ch);
78 ch = nullptr;
79 return 0;
80 }
81 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
82 free(ch);
83 ch = nullptr;
84 return 0;
85 }