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 "abilitycontext_fuzzer.h"
17
18#include <cstddef>
19#include <cstdint>
20
21#include "ability_record.h"
22#define private public
23#include "fa_ability_context.h"
24#undef private
25#include "want.h"
26#include "parcel.h"
27#include "securec.h"
28
29using namespace OHOS::AAFwk;
30using namespace OHOS::AppExecFwk;
31
32namespace OHOS {
33namespace {
34constexpr int INPUT_ZERO = 0;
35constexpr int INPUT_ONE = 1;
36constexpr int INPUT_TWO = 2;
37constexpr int INPUT_THREE = 3;
38constexpr size_t FOO_MAX_LEN = 1024;
39constexpr size_t OFFSET_ZERO = 24;
40constexpr size_t OFFSET_ONE = 16;
41constexpr size_t OFFSET_TWO = 8;
42constexpr size_t U32_AT_SIZE = 4;
43}
44uint32_t GetU32Data(const char* ptr)
45{
46    // convert fuzz input data to an integer
47    return (ptr[INPUT_ZERO] << OFFSET_ZERO) | (ptr[INPUT_ONE] << OFFSET_ONE) | (ptr[INPUT_TWO] << OFFSET_TWO) |
48        ptr[INPUT_THREE];
49}
50sptr<Token> GetFuzzAbilityToken()
51{
52    sptr<Token> token = nullptr;
53
54    AbilityRequest abilityRequest;
55    abilityRequest.appInfo.bundleName = "com.example.fuzzTest";
56    abilityRequest.abilityInfo.name = "MainAbility";
57    abilityRequest.abilityInfo.type = AbilityType::PAGE;
58    std::shared_ptr<AbilityRecord> abilityRecord = AbilityRecord::CreateAbilityRecord(abilityRequest);
59    if (abilityRecord) {
60        token = abilityRecord->GetToken();
61    }
62
63    return token;
64}
65bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
66{
67    AbilityContext abilityContext;
68    // fuzz for want
69    Parcel wantParcel;
70    Want* want = nullptr;
71    if (wantParcel.WriteBuffer(data, size)) {
72        want = Want::Unmarshalling(wantParcel);
73        if (!want) {
74            return false;
75        }
76    }
77    int requestCode = static_cast<int>(GetU32Data(data));
78    abilityContext.StartAbility(*want, requestCode);
79    sptr<AAFwk::IAbilityConnection> conn = nullptr;
80    abilityContext.ConnectAbility(*want, conn);
81    abilityContext.StopAbility(*want);
82    std::string name(data, size);
83    int mode = static_cast<int>(GetU32Data(data));
84    abilityContext.GetDir(name, mode);
85    std::string bundleName(data, size);
86    int flag = static_cast<int>(GetU32Data(data));
87    int accountId = static_cast<int>(GetU32Data(data));
88    abilityContext.CreateBundleContext(bundleName, flag, accountId);
89    std::string permission(data, size);
90    int pid = static_cast<int>(GetU32Data(data));
91    int uid = static_cast<int>(GetU32Data(data));
92    abilityContext.VerifyPermission(permission, pid, uid);
93    std::string permissionName(data, size);
94    std::string des(data, size);
95    abilityContext.GetPermissionDes(permissionName, des);
96    std::vector<std::string> permissions;
97    std::string fileName(data, size);
98    std::string deviceId(data, size);
99    std::string abilityName(data, size);
100    std::string moduleName(data, size);
101    abilityContext.SetCallingContext(deviceId, bundleName, abilityName, moduleName);
102    std::shared_ptr<ContextDeal> base = nullptr;
103    abilityContext.AttachBaseContext(base);
104    std::string type(data, size);
105    abilityContext.GetExternalFilesDir(type);
106    std::string url(data, size);
107    Uri uri = Uri(url);
108    abilityContext.UnauthUriPermission(permission, uri, uid);
109    int patternId = static_cast<int>(GetU32Data(data));
110    abilityContext.SetPattern(patternId);
111    BundleInfo bundleInfo;
112    std::shared_ptr<ContextDeal> deal = nullptr;
113    abilityContext.InitResourceManager(bundleInfo, deal);
114    int resId = static_cast<int>(GetU32Data(data));
115    abilityContext.GetString(resId);
116    abilityContext.GetStringArray(resId);
117    abilityContext.GetIntArray(resId);
118    int themeId = static_cast<int>(GetU32Data(data));
119    abilityContext.SetTheme(themeId);
120    abilityContext.GetColor(resId);
121    abilityContext.SetColorMode(mode);
122    std::vector<AAFwk::Want> wants;
123    abilityContext.StartAbilities(wants);
124    if (want) {
125        delete want;
126        want = nullptr;
127    }
128    return (abilityContext.DisconnectAbility(conn) == 0);
129}
130}
131
132/* Fuzzer entry point */
133extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
134{
135    /* Run your code on data */
136    if (data == nullptr) {
137        std::cout << "invalid data" << std::endl;
138        return 0;
139    }
140
141    /* Validate the length of size */
142    if (size > OHOS::FOO_MAX_LEN || size < OHOS::U32_AT_SIZE) {
143        return 0;
144    }
145
146    char* ch = (char*)malloc(size + 1);
147    if (ch == nullptr) {
148        std::cout << "malloc failed." << std::endl;
149        return 0;
150    }
151
152    (void)memset_s(ch, size + 1, 0x00, size + 1);
153    if (memcpy_s(ch, size, data, size) != EOK) {
154        std::cout << "copy failed." << std::endl;
155        free(ch);
156        ch = nullptr;
157        return 0;
158    }
159
160    OHOS::DoSomethingInterestingWithMyAPI(ch, size);
161    free(ch);
162    ch = nullptr;
163    return 0;
164}
165
166