1/*
2 * Copyright (c) 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
16#include "smspdubuffer_fuzzer.h"
17
18#include "addsmstoken_fuzzer.h"
19#include "sms_pdu_buffer.h"
20
21using namespace OHOS::Telephony;
22namespace OHOS {
23static constexpr uint8_t TEST_BITS = 16;
24
25void ReadBuffer(const uint8_t *data, size_t size)
26{
27    std::string strValue(reinterpret_cast<const char *>(data), size);
28    auto buffer = std::make_unique<SmsReadBuffer>(strValue);
29    if (buffer == nullptr) {
30        return;
31    }
32    buffer->IsEmpty();
33
34    uint16_t desLen = static_cast<uint16_t>(size);
35    desLen += desLen;
36    for (uint16_t i = 0; i < desLen; i++) {
37        buffer->SetIndex(i);
38        buffer->GetIndex();
39    }
40    for (uint16_t i = 0; i < desLen; i++) {
41        buffer->MoveBack(i);
42    }
43    for (uint16_t i = 0; i < desLen; i++) {
44        buffer->MoveForward(i);
45    }
46
47    buffer->SetIndex(0);
48    uint8_t v1 = 0;
49    uint16_t v2 = 0;
50    for (uint16_t i = 0; i < desLen; i++) {
51        buffer->ReadByte(v1);
52        buffer->ReadWord(v2);
53    }
54
55    buffer->SetIndex(0);
56    uint8_t v3 = 0;
57    for (uint16_t i = 0; i < desLen; i++) {
58        for (uint8_t j = 0; j < TEST_BITS; j++) {
59            buffer->ReadBits(v3, j);
60        }
61    }
62    buffer->SkipBits();
63}
64
65void WriteBuffer(const uint8_t *data, size_t size)
66{
67    auto buffer = std::make_unique<SmsWriteBuffer>();
68    if (buffer == nullptr) {
69        return;
70    }
71    buffer->IsEmpty();
72
73    for (uint16_t i = 0; i < size; i++) {
74        buffer->SetIndex(i);
75        buffer->GetIndex();
76    }
77    for (uint16_t i = 0; i < size; i++) {
78        buffer->MoveBack(i);
79    }
80    for (uint16_t i = 0; i < size; i++) {
81        buffer->MoveForward(i);
82    }
83
84    buffer->SetIndex(0);
85    for (uint16_t i = 0; i < size; i++) {
86        buffer->WriteByte(data[i]);
87    }
88    auto pduBuffer = buffer->GetPduBuffer();
89
90    buffer->SetIndex(0);
91    for (uint16_t i = 0; i < size; i++) {
92        buffer->WriteWord(static_cast<uint16_t>(data[i]));
93    }
94    auto pduBuffer2 = buffer->GetPduBuffer();
95
96    buffer->SetIndex(0);
97    uint8_t v3 = 0;
98    for (uint16_t i = 0; i < size; i++) {
99        for (uint8_t j = 0; j < TEST_BITS; j++) {
100            buffer->WriteBits(v3, j);
101        }
102    }
103    buffer->SkipBits();
104    auto pduBuffer3 = buffer->GetPduBuffer();
105
106    buffer->SetIndex(0);
107    for (uint16_t i = 0; i < size; i++) {
108        buffer->InsertByte(data[i], i);
109    }
110    auto pduBuffer4 = buffer->GetPduBuffer();
111}
112
113void DoSomethingInterestingWithMyAPI(const uint8_t *data, size_t size)
114{
115    if (data == nullptr || size == 0) {
116        return;
117    }
118
119    ReadBuffer(data, size);
120    WriteBuffer(data, size);
121}
122
123} // namespace OHOS
124
125/* Fuzzer entry point */
126extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
127{
128    /* Run your code on data */
129    OHOS::AddSmsTokenFuzzer token;
130    OHOS::DoSomethingInterestingWithMyAPI(data, size);
131    return 0;
132}
133