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 "hksupdate_fuzzer.h"
17
18 #include <securec.h>
19
20 #include "hks_api.h"
21 #include "hks_mem.h"
22 #include "hks_param.h"
23 #include "hks_type.h"
24
25 const int BLOB_SIZE = 10;
26 const int DOUBLE_BLOB_SIZE = 20;
27 const int TRIPLE_BLOB_SIZE = 30;
28
29 namespace OHOS {
DoSomethingInterestingWithMyAPI(const uint8_t * data,size_t size)30 bool DoSomethingInterestingWithMyAPI(const uint8_t *data, size_t size)
31 {
32 if (data == nullptr || size <= (sizeof(struct HksParamSet) + TRIPLE_BLOB_SIZE)) {
33 return false;
34 }
35
36 uint8_t *myData = static_cast<uint8_t *>(HksMalloc(sizeof(uint8_t) * size));
37 if (myData == nullptr) {
38 return false;
39 }
40
41 (void)memcpy_s(myData, size, data, size);
42
43 struct HksBlob handle = { BLOB_SIZE, myData };
44 struct HksBlob inData = { BLOB_SIZE, static_cast<uint8_t *>(myData + BLOB_SIZE) };
45 struct HksBlob outData = { BLOB_SIZE, static_cast<uint8_t *>(myData + DOUBLE_BLOB_SIZE) };
46
47 struct HksParamSet *paramSet = reinterpret_cast<struct HksParamSet *>(myData + TRIPLE_BLOB_SIZE);
48 paramSet->paramSetSize = size - TRIPLE_BLOB_SIZE;
49
50 (void)HksUpdate(&handle, paramSet, &inData, &outData);
51
52 HksFree(myData);
53 return true;
54 }
55 }
56
57 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)58 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
59 {
60 /* Run your code on data */
61 OHOS::DoSomethingInterestingWithMyAPI(data, size);
62 return 0;
63 }
64