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 "hcfrandcreate_fuzzer.h"
17
18 #include <cstddef>
19 #include <cstdint>
20
21 #include "blob.h"
22 #include "rand.h"
23 #include "result.h"
24 #include "securec.h"
25
26 const uint8_t* g_testFuzzData = nullptr;
27 size_t g_testFuzzSize = 0;
28 size_t g_testFuzzPos = 0;
29
30 template<class T>
GetData()31 T GetData()
32 {
33 T object{};
34 size_t objectSize = sizeof(T);
35 if (g_testFuzzData == nullptr || objectSize > g_testFuzzSize - g_testFuzzPos) {
36 return object;
37 }
38 if (memcpy_s(&object, objectSize, g_testFuzzData + g_testFuzzPos, objectSize) != EOK) {
39 return {};
40 }
41 g_testFuzzPos += objectSize;
42 return object;
43 }
44
45 namespace OHOS {
HcfRandCreateFuzzTest(const uint8_t * data,size_t size)46 bool HcfRandCreateFuzzTest(const uint8_t* data, size_t size)
47 {
48 g_testFuzzData = data;
49 g_testFuzzSize = size;
50 g_testFuzzPos = 0;
51 int32_t numBytes = GetData<int32_t>();
52 HcfRand *randObj = nullptr;
53 HcfResult res = HcfRandCreate(&randObj);
54 if (res != HCF_SUCCESS) {
55 return false;
56 }
57 struct HcfBlob randomBlob = { 0 };
58 (void)randObj->generateRandom(randObj, numBytes, &randomBlob);
59 struct HcfBlob seedBlob = { 0 };
60 (void)randObj->setSeed(randObj, &seedBlob);
61 (void)randObj->getAlgoName(randObj);
62 HcfBlobDataFree(&randomBlob);
63 HcfBlobDataFree(&seedBlob);
64 HcfObjDestroy(randObj);
65 return true;
66 }
67 }
68
69 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)70 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
71 {
72 /* Run your code on data */
73 OHOS::HcfRandCreateFuzzTest(data, size);
74 return 0;
75 }
76
77