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 #include "hksbnexpmod_fuzzer.h"
16
17 #include <securec.h>
18
19 #include "hks_api.h"
20 #include "hks_mem.h"
21 #include "hks_param.h"
22 #include "hks_type.h"
23
24 #include "hks_fuzz_util.h"
25
26 constexpr int BN_SIZE = 10;
27 constexpr int BN_COUNT = 4;
28
29 namespace OHOS {
30 namespace Security {
31 namespace Hks {
32
DoSomethingInterestingWithMyAPI(uint8_t * data,size_t size)33 bool DoSomethingInterestingWithMyAPI(uint8_t *data, size_t size)
34 {
35 if (data == nullptr || size < (BN_SIZE * BN_COUNT)) {
36 return -1;
37 }
38
39 struct HksBlob x = { BN_SIZE, ReadData<uint8_t *>(data, size, BN_SIZE) };
40 struct HksBlob a = { BN_SIZE, ReadData<uint8_t *>(data, size, BN_SIZE) };
41 struct HksBlob e = { BN_SIZE, ReadData<uint8_t *>(data, size, BN_SIZE) };
42 struct HksBlob n = { BN_SIZE, ReadData<uint8_t *>(data, size, BN_SIZE) };
43
44 [[maybe_unused]] int ret = HksBnExpMod(&x, &a, &e, &n);
45
46 return 0;
47 }
48 }}}
49
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)50 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
51 {
52 std::vector<uint8_t> v(data, data + size);
53 return OHOS::Security::Hks::DoSomethingInterestingWithMyAPI(v.data(), v.size());
54 }
55