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 "huks_hdi_fuzzer.h"
17#include "huks_hdi_passthrough_adapter.h"
18#include "huks_hdi_fuzz_common.h"
19
20#include <cstddef>
21#include <cstdint>
22#include <securec.h>
23
24
25struct HuksHdi *g_instance = nullptr;
26
27#define SIZE_KEY 276
28#define SIZE_PARAMSET_INIT 172
29#define SIZE_PARAMSET_UPDATE 120
30#define SIZE_PARAMSET_FINISH 188
31#define ALLSIZE (SIZE_KEY + SIZE_PARAMSET_INIT + SIZE_PARAMSET_UPDATE + SIZE_PARAMSET_FINISH)
32
33bool DoSomethingInterestingWithMyAPI(const uint8_t* data, size_t size)
34{
35    if (data == nullptr || size <= ALLSIZE) {
36        return false;
37    }
38
39    uint8_t *myData = static_cast<uint8_t *>(malloc(sizeof(uint8_t) * size));
40    if (myData == nullptr) {
41        return false;
42    }
43
44    (void)memcpy_s(myData, size, data, size);
45
46    struct HksBlob key = { SIZE_KEY, myData };
47    struct HksParamSet *paramSet = reinterpret_cast<struct HksParamSet *>(myData + SIZE_KEY);
48    paramSet->paramSetSize = SIZE_PARAMSET_INIT;
49    uint8_t buffer[32];
50    struct HksBlob handle = {
51        .data = buffer,
52        .size = sizeof(buffer)
53    };
54
55    struct HksBlob inData = { size, myData };
56    struct HksParamSet *paramSetUpdate = reinterpret_cast<struct HksParamSet *>(myData + SIZE_KEY + SIZE_PARAMSET_INIT);
57    paramSetUpdate->paramSetSize = SIZE_PARAMSET_UPDATE;
58
59    struct HksParamSet *paramSetFinish = reinterpret_cast<struct HksParamSet *>(myData + SIZE_KEY + SIZE_PARAMSET_INIT +
60        SIZE_PARAMSET_UPDATE);
61    paramSetFinish->paramSetSize = SIZE_PARAMSET_FINISH;
62
63#ifdef HUKS_HDI_SOFTWARE
64    if (HuksFreshParamSet(paramSetUpdate, false) != 0 || HuksFreshParamSet(paramSetFinish, false) != 0) {
65        free(myData);
66        return false;
67    }
68#endif
69    uint8_t buffer2[1024];
70    struct HksBlob out = {
71        .data = buffer2,
72        .size = sizeof(buffer2)
73    };
74
75    (void)g_instance->HuksHdiInit(&key, paramSet, &handle, &out);
76    (void)g_instance->HuksHdiUpdate(&handle, paramSetUpdate, &inData, &out);
77    (void)g_instance->HuksHdiFinish(&handle, paramSetFinish, &inData, &out);
78
79    free(myData);
80    return true;
81}
82
83/* Fuzzer entry point */
84extern "C" int32_t LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
85{
86    if (InitHuksCoreEngine(&g_instance) != 0) {
87        return -1;
88    }
89    DoSomethingInterestingWithMyAPI(data, size);
90    return 0;
91}
92