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 "abilitymgrjumpinterceptor_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #define private public
22 #include "interceptor/ability_jump_interceptor.h"
23 #include "bundle_mgr_helper.h"
24 #undef private
25
26 #include "securec.h"
27 #include "ability_record.h"
28
29 using namespace OHOS::AAFwk;
30 using namespace OHOS::AppExecFwk;
31
32 namespace OHOS {
33 namespace {
34 constexpr int INPUT_ZERO = 0;
35 constexpr int INPUT_ONE = 1;
36 constexpr int INPUT_TWO = 2;
37 constexpr int INPUT_THREE = 3;
38 constexpr size_t FOO_MAX_LEN = 1024;
39 constexpr size_t U32_AT_SIZE = 4;
40 constexpr size_t OFFSET_ZERO = 24;
41 constexpr size_t OFFSET_ONE = 16;
42 constexpr size_t OFFSET_TWO = 8;
43 constexpr uint8_t ENABLE = 2;
44 }
GetU32Data(const char * ptr)45 uint32_t GetU32Data(const char* ptr)
46 {
47 // convert fuzz input data to an integer
48 return (ptr[INPUT_ZERO] << OFFSET_ZERO) | (ptr[INPUT_ONE] << OFFSET_ONE) | (ptr[INPUT_TWO] << OFFSET_TWO) |
49 ptr[INPUT_THREE];
50 }
51
GetFuzzAbilityToken()52 sptr<Token> GetFuzzAbilityToken()
53 {
54 sptr<Token> token = nullptr;
55 AbilityRequest abilityRequest;
56 abilityRequest.appInfo.bundleName = "com.example.fuzzTest";
57 abilityRequest.abilityInfo.name = "MainAbility";
58 abilityRequest.abilityInfo.type = AbilityType::DATA;
59 std::shared_ptr<AbilityRecord> abilityRecord = AbilityRecord::CreateAbilityRecord(abilityRequest);
60 if (abilityRecord) {
61 token = abilityRecord->GetToken();
62 }
63 return token;
64 }
65
DoSomethingInterestingWithMyAPI(const char * data,size_t size)66 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
67 {
68 std::shared_ptr<AbilityJumpInterceptor> interceptor = std::make_shared<AbilityJumpInterceptor>();
69 std::string jsonStr(data, size);
70 Want want;
71 ElementName element("", "com.acts.disposedrulehap", "MainAbility", "entry");
72 want.SetElement(element);
73 int requestCode = static_cast<int>(GetU32Data(data));
74 int32_t userId = static_cast<int32_t>(GetU32Data(data));
75 bool boolParam = *data % ENABLE;
76 sptr<IRemoteObject> callerToken = GetFuzzAbilityToken();
77 AbilityInterceptorParam param(want, requestCode, userId, boolParam, callerToken);
78 interceptor->DoProcess(param);
79 std::shared_ptr<AppExecFwk::BundleMgrHelper> bundleMgrHelper = std::make_shared<AppExecFwk::BundleMgrHelper>();
80 AppExecFwk::AppJumpControlRule controlRule;
81 interceptor->CheckControl(bundleMgrHelper, want, userId, controlRule);
82 interceptor->CheckIfJumpExempt(controlRule, userId);
83 interceptor->CheckIfExemptByBundleName(jsonStr, jsonStr, userId);
84 interceptor->LoadAppLabelInfo(want, controlRule, userId);
85 return true;
86 }
87 }
88
89 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)90 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
91 {
92 /* Run your code on data */
93 if (data == nullptr) {
94 std::cout << "invalid data" << std::endl;
95 return 0;
96 }
97
98 /* Validate the length of size */
99 if (size > OHOS::FOO_MAX_LEN || size < OHOS::U32_AT_SIZE) {
100 return 0;
101 }
102
103 char* ch = static_cast<char*>(malloc(size + 1));
104 if (ch == nullptr) {
105 std::cout << "malloc failed." << std::endl;
106 return 0;
107 }
108
109 (void)memset_s(ch, size + 1, 0x00, size + 1);
110 if (memcpy_s(ch, size + 1, data, size) != EOK) {
111 std::cout << "copy failed." << std::endl;
112 free(ch);
113 ch = nullptr;
114 return 0;
115 }
116
117 OHOS::DoSomethingInterestingWithMyAPI(ch, size);
118 free(ch);
119 ch = nullptr;
120 return 0;
121 }
122
123