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 "systemabilitytokencallbackstub_fuzzer.h"
17
18#include <cstddef>
19#include <cstdint>
20
21#include "system_ability_token_callback_stub.h"
22#include "message_parcel.h"
23#include "securec.h"
24
25using namespace OHOS::AAFwk;
26
27namespace OHOS {
28namespace {
29constexpr size_t FOO_MAX_LEN = 1024;
30constexpr size_t U32_AT_SIZE = 4;
31const std::u16string ABILITYMGR_INTERFACE_TOKEN = u"ohos.aafwk.ISystemAbilityTokenCallback";
32}
33
34class SystemAbilityTokenCallbackStubFuzzTest : public SystemAbilityTokenCallbackStub {
35public:
36    SystemAbilityTokenCallbackStubFuzzTest() = default;
37    virtual ~SystemAbilityTokenCallbackStubFuzzTest()
38    {}
39    int32_t SendResult(OHOS::AAFwk::Want& want, int32_t callerUid, int32_t requestCode,
40        uint32_t accessToken, int32_t resultCode) override
41    {
42        return 0;
43    }
44};
45
46uint32_t GetU32Data(const char* ptr)
47{
48    // convert fuzz input data to an integer
49    return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | ptr[3];
50}
51
52bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
53{
54    uint32_t code = GetU32Data(data);
55
56    MessageParcel parcel;
57    parcel.WriteInterfaceToken(ABILITYMGR_INTERFACE_TOKEN);
58    parcel.WriteBuffer(data, size);
59    parcel.RewindRead(0);
60    MessageParcel reply;
61    MessageOption option;
62
63    std::shared_ptr<SystemAbilityTokenCallbackStub> systemabilitytokencallbackstub
64        = std::make_shared<SystemAbilityTokenCallbackStubFuzzTest>();
65
66    systemabilitytokencallbackstub->OnRemoteRequest(code, parcel, reply, option);
67
68    return true;
69}
70}
71
72/* Fuzzer entry point */
73extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
74{
75    /* Run your code on data */
76    if (data == nullptr) {
77        std::cout << "invalid data" << std::endl;
78        return 0;
79    }
80
81    /* Validate the length of size */
82    if (size > OHOS::FOO_MAX_LEN || size < OHOS::U32_AT_SIZE) {
83        return 0;
84    }
85
86    char* ch = (char*)malloc(size + 1);
87    if (ch == nullptr) {
88        std::cout << "malloc failed." << std::endl;
89        return 0;
90    }
91
92    (void)memset_s(ch, size + 1, 0x00, size + 1);
93    if (memcpy_s(ch, size, data, size) != EOK) {
94        std::cout << "copy failed." << std::endl;
95        free(ch);
96        ch = nullptr;
97        return 0;
98    }
99
100    OHOS::DoSomethingInterestingWithMyAPI(ch, size);
101    free(ch);
102    ch = nullptr;
103    return 0;
104}