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 "registerenvironmentcallback_fuzzer.h"
17
18#include <cstddef>
19#include <cstdint>
20
21#include "environment_callback.h"
22#include "application_context.h"
23#include "securec.h"
24
25using namespace OHOS::AAFwk;
26using namespace OHOS::AppExecFwk;
27using namespace OHOS::AbilityRuntime;
28
29namespace OHOS {
30namespace {
31constexpr size_t FOO_MAX_LEN = 1024;
32constexpr size_t U32_AT_SIZE = 4;
33}
34class EnvironmentCallbackFuzz : public EnvironmentCallback {
35public:
36    explicit EnvironmentCallbackFuzz() {};
37    void OnConfigurationUpdated(const AppExecFwk::Configuration& config) override {};
38    void OnMemoryLevel(const int level) override {};
39};
40bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
41{
42    auto context = ApplicationContext::GetInstance();
43    if (!context) {
44        return false;
45    }
46
47    std::shared_ptr<EnvironmentCallbackFuzz> callback;
48    context->RegisterEnvironmentCallback(callback);
49
50    return true;
51}
52}
53
54/* Fuzzer entry point */
55extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
56{
57    /* Run your code on data */
58    if (data == nullptr) {
59        std::cout << "invalid data" << std::endl;
60        return 0;
61    }
62
63    /* Validate the length of size */
64    if (size > OHOS::FOO_MAX_LEN || size < OHOS::U32_AT_SIZE) {
65        return 0;
66    }
67
68    char* ch = (char*)malloc(size + 1);
69    if (ch == nullptr) {
70        std::cout << "malloc failed." << std::endl;
71        return 0;
72    }
73
74    (void)memset_s(ch, size + 1, 0x00, size + 1);
75    if (memcpy_s(ch, size, data, size) != EOK) {
76        std::cout << "copy failed." << std::endl;
77        free(ch);
78        ch = nullptr;
79        return 0;
80    }
81
82    OHOS::DoSomethingInterestingWithMyAPI(ch, size);
83    free(ch);
84    ch = nullptr;
85    return 0;
86}
87