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 "accessibilityconfig_fuzzer.h"
17 #include "accessibility_config.h"
18 #include "accesstoken_kit.h"
19 #include "nativetoken_kit.h"
20 #include "securec.h"
21 #include "token_setproc.h"
22
23 namespace OHOS {
24 namespace {
25 constexpr size_t DATA_MIN_SIZE = 181;
26 constexpr char END_CHAR = '\0';
27 constexpr size_t LEN = 10;
28 bool g_flag = true;
29 } // namespace
30 using namespace OHOS::Security::AccessToken;
31
32 class ConfigObserver : public OHOS::AccessibilityConfig::AccessibilityConfigObserver {
33 public:
OnConfigChanged(const OHOS::AccessibilityConfig::CONFIG_ID id,const OHOS::AccessibilityConfig::ConfigValue & value)34 void OnConfigChanged(const OHOS::AccessibilityConfig::CONFIG_ID id,
35 const OHOS::AccessibilityConfig::ConfigValue &value) override
36 {
37 }
38 };
39
40 class EnableAbilityListObserver : public OHOS::AccessibilityConfig::AccessibilityEnableAbilityListsObserver {
41 public:
OnEnableAbilityListsStateChanged()42 void OnEnableAbilityListsStateChanged() override
43 {
44 }
45 };
46
47 template<class T>
GetObject(T & object,const uint8_t * data,size_t size)48 size_t GetObject(T &object, const uint8_t *data, size_t size)
49 {
50 size_t objectSize = sizeof(object);
51 if (objectSize > size) {
52 return 0;
53 }
54 return memcpy_s(&object, objectSize, data, objectSize) == EOK ? objectSize : 0;
55 }
56
AddPermission()57 void AddPermission()
58 {
59 if (g_flag) {
60 const char *perms[2];
61 perms[0] = OHOS::Accessibility::OHOS_PERMISSION_READ_ACCESSIBILITY_CONFIG.c_str();
62 perms[1] = OHOS::Accessibility::OHOS_PERMISSION_WRITE_ACCESSIBILITY_CONFIG.c_str();
63 NativeTokenInfoParams infoInstance = {
64 .dcapsNum = 0,
65 .permsNum = 2,
66 .aclsNum = 0,
67 .dcaps = nullptr,
68 .perms = perms,
69 .acls = nullptr,
70 .processName = "com.accessibility.config.fuzzer.test",
71 .aplStr = "normal",
72 };
73 uint64_t tokenId = GetAccessTokenId(&infoInstance);
74 SetSelfTokenID(tokenId);
75 AccessTokenKit::ReloadNativeTokenInfo();
76 g_flag = false;
77 }
78 }
79
GenerateCaptionProperty(OHOS::AccessibilityConfig::CaptionProperty & property,const uint8_t * data,size_t size)80 static size_t GenerateCaptionProperty(
81 OHOS::AccessibilityConfig::CaptionProperty &property, const uint8_t* data, size_t size)
82 {
83 size_t position = 0;
84 uint32_t temp = 0;
85 position += GetObject<uint32_t>(temp, &data[position], size - position);
86 property.SetFontColor(temp);
87
88 position += GetObject<uint32_t>(temp, &data[position], size - position);
89 property.SetWindowColor(temp);
90
91 position += GetObject<uint32_t>(temp, &data[position], size - position);
92 property.SetBackgroundColor(temp);
93
94 position += GetObject<uint32_t>(temp, &data[position], size - position);
95 property.SetFontScale(static_cast<int32_t>(temp));
96
97 char name[LEN + 1];
98 name[LEN] = END_CHAR;
99 for (size_t i = 0; i < LEN; i++) {
100 position += GetObject<char>(name[i], &data[position], size - position);
101 }
102 std::string family(name);
103 property.SetFontFamily(family);
104
105 for (size_t i = 0; i < LEN; i++) {
106 position += GetObject<char>(name[i], &data[position], size - position);
107 }
108 std::string type(name);
109 property.SetFontFamily(type);
110
111 return position;
112 }
113
DoSomethingInterestingWithMyAPI(const uint8_t * data,size_t size)114 bool DoSomethingInterestingWithMyAPI(const uint8_t* data, size_t size)
115 {
116 if (data == nullptr || size < DATA_MIN_SIZE) {
117 return false;
118 }
119
120 auto &abConfig = OHOS::AccessibilityConfig::AccessibilityConfig::GetInstance();
121 (void)abConfig.InitializeContext();
122 std::shared_ptr<ConfigObserver> cObserver = std::make_shared<ConfigObserver>();
123 std::shared_ptr<EnableAbilityListObserver> eObserver = std::make_shared<EnableAbilityListObserver>();
124
125 size_t startPos = 0;
126 abConfig.SetScreenMagnificationState(data[startPos++] & 0x01);
127 abConfig.SetShortKeyState(data[startPos++] & 0x01);
128 abConfig.SetMouseKeyState(data[startPos++] & 0x01);
129 abConfig.SetCaptionsState(data[startPos++] & 0x01);
130 abConfig.SetHighContrastTextState(data[startPos++] & 0x01);
131 abConfig.SetInvertColorState(data[startPos++] & 0x01);
132 abConfig.SetAnimationOffState(data[startPos++] & 0x01);
133 abConfig.SetAudioMonoState(data[startPos++] & 0x01);
134
135 uint32_t temp = 0;
136 startPos += GetObject<uint32_t>(temp, &data[startPos], size - startPos);
137 abConfig.SetContentTimeout(temp);
138
139 startPos += GetObject<uint32_t>(temp, &data[startPos], size - startPos);
140 abConfig.SetDaltonizationColorFilter(static_cast<OHOS::AccessibilityConfig::DALTONIZATION_TYPE>(temp));
141
142 startPos += GetObject<uint32_t>(temp, &data[startPos], size - startPos);
143 abConfig.SetMouseAutoClick(static_cast<int32_t>(temp));
144
145 float tempFloat = 0;
146 startPos += GetObject<float>(tempFloat, &data[startPos], size - startPos);
147 abConfig.SetBrightnessDiscount(tempFloat);
148
149 startPos += GetObject<float>(tempFloat, &data[startPos], size - startPos);
150 abConfig.SetAudioBalance(tempFloat);
151
152 char name[LEN + 1];
153 name[LEN] = END_CHAR;
154 for (size_t i = 0; i < LEN; i++) {
155 startPos += GetObject<char>(name[i], &data[startPos], size - startPos);
156 }
157 std::string nameStr(name);
158 abConfig.SetShortkeyTarget(nameStr);
159
160 OHOS::AccessibilityConfig::CaptionProperty property;
161 startPos += GenerateCaptionProperty(property, &data[startPos], size - startPos);
162 abConfig.SetCaptionsProperty(property);
163
164 for (size_t i = 0; i < LEN; i++) {
165 startPos += GetObject<char>(name[i], &data[startPos], size - startPos);
166 }
167 std::string abilityName1(name);
168 startPos += GetObject<uint32_t>(temp, &data[startPos], size - startPos);
169 abConfig.EnableAbility(abilityName1, temp);
170
171 for (size_t i = 0; i < LEN; i++) {
172 startPos += GetObject<char>(name[i], &data[startPos], size - startPos);
173 }
174 std::string abilityName2(name);
175 abConfig.DisableAbility(abilityName2);
176
177 bool flag = data[startPos++] & 0x01;
178 startPos += GetObject<uint32_t>(temp, &data[startPos], size - startPos);
179 abConfig.SubscribeConfigObserver(static_cast<OHOS::AccessibilityConfig::CONFIG_ID>(temp), cObserver, flag);
180 startPos += GetObject<uint32_t>(temp, &data[startPos], size - startPos);
181 abConfig.UnsubscribeConfigObserver(static_cast<OHOS::AccessibilityConfig::CONFIG_ID>(temp), cObserver);
182 abConfig.SubscribeEnableAbilityListsObserver(eObserver);
183 abConfig.UnsubscribeEnableAbilityListsObserver(eObserver);
184
185 flag = data[startPos++] & 0x01;
186 abConfig.GetScreenMagnificationState(flag);
187 flag = data[startPos++] & 0x01;
188 abConfig.GetShortKeyState(flag);
189 flag = data[startPos++] & 0x01;
190 abConfig.GetMouseKeyState(flag);
191 flag = data[startPos++] & 0x01;
192 abConfig.GetCaptionsState(flag);
193 flag = data[startPos++] & 0x01;
194 abConfig.GetHighContrastTextState(flag);
195 flag = data[startPos++] & 0x01;
196 abConfig.GetInvertColorState(flag);
197 flag = data[startPos++] & 0x01;
198 abConfig.GetAnimationOffState(flag);
199 flag = data[startPos++] & 0x01;
200 abConfig.GetAudioMonoState(flag);
201
202 startPos += GetObject<uint32_t>(temp, &data[startPos], size - startPos);
203 abConfig.GetContentTimeout(temp);
204
205 startPos += GetObject<uint32_t>(temp, &data[startPos], size - startPos);
206 OHOS::AccessibilityConfig::DALTONIZATION_TYPE types =
207 static_cast<OHOS::AccessibilityConfig::DALTONIZATION_TYPE>(temp);
208 abConfig.GetDaltonizationColorFilter(types);
209
210 startPos += GetObject<uint32_t>(temp, &data[startPos], size - startPos);
211 int32_t clicks = static_cast<int32_t>(temp);
212 abConfig.GetMouseAutoClick(clicks);
213
214 startPos += GetObject<float>(tempFloat, &data[startPos], size - startPos);
215 abConfig.GetBrightnessDiscount(tempFloat);
216
217 startPos += GetObject<float>(tempFloat, &data[startPos], size - startPos);
218 abConfig.GetAudioBalance(tempFloat);
219
220 for (size_t i = 0; i < LEN; i++) {
221 startPos += GetObject<char>(name[i], &data[startPos], size - startPos);
222 }
223 std::string nameStrForGet(name);
224 abConfig.GetShortkeyTarget(nameStrForGet);
225
226 OHOS::AccessibilityConfig::CaptionProperty propertyForGet;
227 GenerateCaptionProperty(propertyForGet, &data[startPos], size - startPos);
228 abConfig.GetCaptionsProperty(propertyForGet);
229
230 return true;
231 }
232 }
233
234 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)235 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
236 {
237 OHOS::AddPermission();
238 /* Run your code on data */
239 OHOS::DoSomethingInterestingWithMyAPI(data, size);
240 return 0;
241 }
242