1 /*
2 * Copyright (c) 2022-2022 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 "systemabilitystub_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "input_method_system_ability.h"
22 #include "input_method_controller.h"
23 #include "accesstoken_kit.h"
24 #include "token_setproc.h"
25 #include "nativetoken_kit.h"
26 #include "global.h"
27
28 #include "message_parcel.h"
29
30 using namespace OHOS::Security::AccessToken;
31 using namespace OHOS::MiscServices;
32 namespace OHOS {
GrantNativePermission()33 void GrantNativePermission()
34 {
35 const char **perms = new const char *[1];
36 perms[0] = "ohos.permission.CONNECT_IME_ABILITY";
37 TokenInfoParams infoInstance = {
38 .dcapsNum = 0,
39 .permsNum = 1,
40 .aclsNum = 0,
41 .dcaps = nullptr,
42 .perms = perms,
43 .acls = nullptr,
44 .processName = "inputmethod_imf",
45 .aplStr = "system_core",
46 };
47 uint64_t tokenId = GetAccessTokenId(&infoInstance);
48 int res = SetSelfTokenID(tokenId);
49 if (res == 0) {
50 IMSA_HILOGI("SetSelfTokenID success!");
51 } else {
52 IMSA_HILOGE("SetSelfTokenID fail!");
53 }
54 AccessTokenKit::ReloadNativeTokenInfo();
55 delete[] perms;
56 }
57
58 class TextListener : public OnTextChangedListener {
59 public:
TextListener()60 TextListener() {}
~TextListener()61 ~TextListener() {}
InsertText(const std::u16string & text)62 void InsertText(const std::u16string& text)
63 {
64 }
DeleteBackward(int32_t length)65 void DeleteBackward(int32_t length)
66 {
67 }
SetKeyboardStatus(bool status)68 void SetKeyboardStatus(bool status)
69 {
70 }
DeleteForward(int32_t length)71 void DeleteForward(int32_t length)
72 {
73 }
SendKeyEventFromInputMethod(const KeyEvent & event)74 void SendKeyEventFromInputMethod(const KeyEvent& event)
75 {
76 }
SendKeyboardInfo(const KeyboardInfo & status)77 void SendKeyboardInfo(const KeyboardInfo& status)
78 {
79 }
MoveCursor(const Direction direction)80 void MoveCursor(const Direction direction)
81 {
82 }
HandleSetSelection(int32_t start,int32_t end)83 void HandleSetSelection(int32_t start, int32_t end)
84 {
85 }
HandleExtendAction(int32_t action)86 void HandleExtendAction(int32_t action)
87 {
88 }
HandleSelect(int32_t keyCode,int32_t cursorMoveSkip)89 void HandleSelect(int32_t keyCode, int32_t cursorMoveSkip)
90 {
91 }
92 };
93 constexpr size_t THRESHOLD = 10;
94 constexpr int32_t OFFSET = 4;
95 const std::u16string SYSTEMABILITY_INTERFACE_TOKEN = u"ohos.miscservices.inputmethod.IInputMethodSystemAbility";
96
ConvertToUint32(const uint8_t * ptr)97 uint32_t ConvertToUint32(const uint8_t *ptr)
98 {
99 if (ptr == nullptr) {
100 return 0;
101 }
102 uint32_t bigVar = (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3]);
103 return bigVar;
104 }
FuzzInputMethodSystemAbility(const uint8_t * rawData,size_t size)105 bool FuzzInputMethodSystemAbility(const uint8_t* rawData, size_t size)
106 {
107 GrantNativePermission();
108 uint32_t code = ConvertToUint32(rawData);
109 rawData = rawData + OFFSET;
110 size = size - OFFSET;
111
112 sptr<InputMethodController> imc = InputMethodController::GetInstance();
113 sptr<OnTextChangedListener> textListener = new TextListener();
114 imc->Attach(textListener);
115
116 MessageParcel data;
117 data.WriteInterfaceToken(SYSTEMABILITY_INTERFACE_TOKEN);
118 data.WriteBuffer(rawData, size);
119 data.RewindRead(0);
120 MessageParcel reply;
121 MessageOption option;
122
123 sptr<InputMethodSystemAbility> ability = new InputMethodSystemAbility();
124 ability->OnRemoteRequest(code, data, reply, option);
125
126 return true;
127 }
128 }
129 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)130 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
131 {
132 if (size < OHOS::THRESHOLD) {
133 return 0;
134 }
135 /* Run your code on data */
136 OHOS::FuzzInputMethodSystemAbility(data, size);
137 return 0;
138 }