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 "startuser_fuzzer.h"
17
18#include <cstddef>
19#include <cstdint>
20
21#include "ability_manager_client.h"
22#include "securec.h"
23
24using namespace OHOS::AAFwk;
25using namespace OHOS::AppExecFwk;
26
27namespace OHOS {
28namespace {
29constexpr size_t FOO_MAX_LEN = 1024;
30constexpr size_t U32_AT_SIZE = 4;
31}
32uint32_t GetU32Data(const char* ptr)
33{
34    // convert fuzz input data to an integer
35    return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | ptr[3];
36}
37bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
38{
39    auto abilitymgr = AbilityManagerClient::GetInstance();
40    if (!abilitymgr) {
41        return false;
42    }
43
44    int accountId = static_cast<int>(GetU32Data(data));
45    sptr<IUserCallback> callback;
46    abilitymgr->StartUser(accountId, callback);
47
48    return true;
49}
50}
51
52/* Fuzzer entry point */
53extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
54{
55    /* Run your code on data */
56    if (data == nullptr) {
57        std::cout << "invalid data" << std::endl;
58        return 0;
59    }
60
61    /* Validate the length of size */
62    if (size > OHOS::FOO_MAX_LEN || size < OHOS::U32_AT_SIZE) {
63        return 0;
64    }
65
66    char* ch = (char*)malloc(size + 1);
67    if (ch == nullptr) {
68        std::cout << "malloc failed." << std::endl;
69        return 0;
70    }
71
72    (void)memset_s(ch, size + 1, 0x00, size + 1);
73    if (memcpy_s(ch, size, data, size) != EOK) {
74        std::cout << "copy failed." << std::endl;
75        free(ch);
76        ch = nullptr;
77        return 0;
78    }
79
80    OHOS::DoSomethingInterestingWithMyAPI(ch, size);
81    free(ch);
82    ch = nullptr;
83    return 0;
84}