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 "iptables_rule_plugin_fuzzer.h"
17
18 #include <system_ability_definition.h>
19
20 #include "common_fuzzer.h"
21 #include "edm_ipc_interface_code.h"
22 #include "func_code.h"
23 #include "get_data_template.h"
24 #include "ienterprise_device_mgr.h"
25 #include "iptables_utils.h"
26 #include "message_parcel.h"
27
28 namespace OHOS {
29 namespace EDM {
30 constexpr size_t MIN_SIZE = 256;
31 constexpr int32_t WITHOUT_USERID = 0;
32 constexpr int32_t MAX_ENUM_LENGTH = 2;
33 constexpr int32_t MAX_PROTOCOL_LENGTH = 4;
34
35 // Fuzzer entry point.
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)36 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
37 {
38 if (data == nullptr || size < MIN_SIZE) {
39 return 0;
40 }
41 int32_t pos = 0;
42 int32_t stringSize = size / 6;
43 for (uint32_t operateType = static_cast<uint32_t>(FuncOperateType::GET);
44 operateType <= static_cast<uint32_t>(FuncOperateType::REMOVE); operateType++) {
45 uint32_t code = EdmInterfaceCode::IPTABLES_RULE;
46 code = POLICY_FUNC_CODE(operateType, code);
47
48 AppExecFwk::ElementName admin;
49 admin.SetBundleName(CommonFuzzer::GetString(data, pos, stringSize, size));
50 admin.SetAbilityName(CommonFuzzer::GetString(data, pos, stringSize, size));
51 MessageParcel parcel;
52 parcel.WriteInterfaceToken(IEnterpriseDeviceMgrIdl::GetDescriptor());
53 parcel.WriteInt32(WITHOUT_USERID);
54 if (operateType) {
55 parcel.WriteParcelable(&admin);
56 IPTABLES::AddFilter addFilter;
57 addFilter.ruleNo = CommonFuzzer::GetU32Data(data);
58 std::string srcAddr(reinterpret_cast<const char*>(data), size);
59 std::string destAddr(reinterpret_cast<const char*>(data), size);
60 std::string srcPort(reinterpret_cast<const char*>(data), size);
61 std::string destPort(reinterpret_cast<const char*>(data), size);
62 std::string uid(reinterpret_cast<const char*>(data), size);
63 addFilter.srcAddr = srcAddr;
64 addFilter.destAddr = destAddr;
65 addFilter.srcPort = srcPort;
66 addFilter.destPort = destPort;
67 addFilter.uid = uid;
68 addFilter.method = static_cast<IPTABLES::AddMethod>(CommonFuzzer::GetU32Data(data) % MAX_ENUM_LENGTH);
69 addFilter.direction = static_cast<IPTABLES::Direction>(CommonFuzzer::GetU32Data(data) % MAX_ENUM_LENGTH);
70 addFilter.action = static_cast<IPTABLES::Action>(CommonFuzzer::GetU32Data(data) % MAX_ENUM_LENGTH);
71 addFilter.protocol = static_cast<IPTABLES::Protocol>(CommonFuzzer::GetU32Data(data) % MAX_PROTOCOL_LENGTH);
72 IPTABLES::IptablesUtils::WriteAddFilterConfig(addFilter, parcel);
73 } else {
74 parcel.WriteString("");
75 parcel.WriteInt32(0);
76 parcel.WriteParcelable(&admin);
77 }
78 CommonFuzzer::OnRemoteRequestFuzzerTest(code, data, size, parcel);
79 }
80 return 0;
81 }
82 } // namespace EDM
83 } // namespace OHOS