1 /*
2 * Copyright (c) 2024-2025 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 "hkswrapkey_fuzzer.h"
16
17 #include "hks_api.h"
18 #include "hks_log.h"
19 #include "hks_mem.h"
20 #include "hks_param.h"
21 #include "hks_type.h"
22
23 #include <securec.h>
24
25 #include "hks_fuzz_util.h"
26
27 constexpr int WRAPPED_KEY_SIZE = 2048;
28 constexpr int BLOB_NUM = 3;
29
30 namespace OHOS {
31 namespace Security {
32 namespace Hks {
33
DoSomethingInterestingWithMyAPI(uint8_t * data,size_t size)34 int DoSomethingInterestingWithMyAPI(uint8_t *data, size_t size)
35 {
36 if (data == nullptr || size < (BLOB_NUM * sizeof(uint32_t))) {
37 return -1;
38 }
39
40 struct HksBlob key = { sizeof(uint32_t), ReadData<uint8_t *>(data, size, sizeof(uint32_t)) };
41 struct HksBlob srcData = { sizeof(uint32_t), ReadData<uint8_t *>(data, size, sizeof(uint32_t)) };
42 struct HksBlob mac = { sizeof(uint32_t), ReadData<uint8_t *>(data, size, sizeof(uint32_t)) };
43
44 WrapParamSet ps = ConstructHksParamSetFromFuzz(data, size);
45
46 uint8_t WrappedData[WRAPPED_KEY_SIZE] = {0};
47 struct HksBlob wrappedKey = {WRAPPED_KEY_SIZE, WrappedData};
48 (void)HksWrapKey(&key, nullptr, ps.s, &wrappedKey);
49
50 (void)HksUnwrapKey(&key, nullptr, &srcData, ps.s);
51
52 (void)HcmIsDeviceKeyExist(ps.s);
53
54 [[maybe_unused]] int ret = HksMac(&key, ps.s, &srcData, &mac);
55
56 return 0;
57 }
58
59 }
60 }
61 }
62
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)63 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
64 {
65 std::vector<uint8_t> v(data, data + size);
66 OHOS::Security::Hks::DoSomethingInterestingWithMyAPI(v.data(), v.size());
67
68 return 0;
69 }
70