1 /*
2 * Copyright (c) 2022-2023 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 #define private public
16 #define protected public
17 #include "input_method_system_ability.h"
18 #include "input_method_system_ability_proxy.h"
19 #undef private
20
21 #include <atomic>
22 #include <cstddef>
23 #include <cstdint>
24 #include <string_ex.h>
25
26 #include "accesstoken_kit.h"
27 #include "global.h"
28 #include "input_method_controller.h"
29 #include "iservice_registry.h"
30 #include "message_parcel.h"
31 #include "nativetoken_kit.h"
32 #include "system_ability_definition.h"
33 #include "systemabilitystub_fuzzer.h"
34 #include "text_listener.h"
35 #include "token_setproc.h"
36
37 using namespace OHOS::Security::AccessToken;
38 using namespace OHOS::MiscServices;
39 namespace OHOS {
40 std::atomic_bool g_isInitialize = false;
41 constexpr uint32_t TARGET_REMOTE_CODE_NUMS = 21;
GrantNativePermission()42 void GrantNativePermission()
43 {
44 const char **perms = new const char *[1];
45 perms[0] = "ohos.permission.CONNECT_IME_ABILITY";
46 TokenInfoParams infoInstance = {
47 .dcapsNum = 0,
48 .permsNum = 1,
49 .aclsNum = 0,
50 .dcaps = nullptr,
51 .perms = perms,
52 .acls = nullptr,
53 .processName = "inputmethod_imf",
54 .aplStr = "system_core",
55 };
56 uint64_t tokenId = GetAccessTokenId(&infoInstance);
57 int res = SetSelfTokenID(tokenId);
58 if (res == 0) {
59 IMSA_HILOGI("SetSelfTokenID success!");
60 } else {
61 IMSA_HILOGE("SetSelfTokenID fail!");
62 }
63 AccessTokenKit::ReloadNativeTokenInfo();
64 delete[] perms;
65 }
66 constexpr size_t THRESHOLD = 10;
67 constexpr int32_t OFFSET = 4;
68 const std::u16string SYSTEMABILITY_INTERFACE_TOKEN = u"ohos.miscservices.inputmethod.IInputMethodSystemAbility";
69
ConvertToUint32(const uint8_t *ptr)70 uint32_t ConvertToUint32(const uint8_t *ptr)
71 {
72 if (ptr == nullptr) {
73 return 0;
74 }
75 uint32_t bigVar = (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3]);
76 return bigVar;
77 }
FuzzInputMethodSystemAbility(const uint8_t *rawData, size_t size)78 bool FuzzInputMethodSystemAbility(const uint8_t *rawData, size_t size)
79 {
80 GrantNativePermission();
81 uint32_t code = ConvertToUint32(rawData) % TARGET_REMOTE_CODE_NUMS;
82 rawData = rawData + OFFSET;
83 size = size - OFFSET;
84
85 if (!g_isInitialize.load()) {
86 DelayedSingleton<InputMethodSystemAbility>::GetInstance()->Initialize();
87 g_isInitialize.store(true);
88 }
89
90 sptr<InputMethodController> imc = InputMethodController::GetInstance();
91 sptr<OnTextChangedListener> textListener = new TextListener();
92 imc->Attach(textListener);
93
94 MessageParcel datas;
95 datas.WriteInterfaceToken(SYSTEMABILITY_INTERFACE_TOKEN);
96 datas.WriteBuffer(rawData, size);
97 datas.RewindRead(0);
98 MessageParcel reply;
99 MessageOption option;
100 DelayedSingleton<InputMethodSystemAbility>::GetInstance()->OnRemoteRequest(code, datas, reply, option);
101 return true;
102 }
103
TestDump(const uint8_t *rawData, size_t size)104 bool TestDump(const uint8_t *rawData, size_t size)
105 {
106 std::vector<std::u16string> args;
107 std::string str(reinterpret_cast<const char *>(rawData), size);
108 args.push_back(Str8ToStr16(str));
109 DelayedSingleton<InputMethodSystemAbility>::GetInstance()->Dump(static_cast<int32_t>(size), args);
110 DelayedSingleton<InputMethodSystemAbility>::GetInstance()->DumpAllMethod(static_cast<int32_t>(size));
111 return true;
112 }
113
114 } // namespace OHOS
115 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)116 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
117 {
118 if (size < OHOS::THRESHOLD) {
119 return 0;
120 }
121 /* Run your code on data */
122 OHOS::FuzzInputMethodSystemAbility(data, size);
123 OHOS::TestDump(data, size);
124 return 0;
125 }
126