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 "hksattestkey_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 const int BLOB_SIZE = 10;
25 const int CERT_COUNT = 4;
26
27 namespace OHOS {
DoSomethingInterestingWithMyAPI(const uint8_t * data,size_t size)28 bool DoSomethingInterestingWithMyAPI(const uint8_t *data, size_t size)
29 {
30 if (data == nullptr ||
31 size <= (BLOB_SIZE + sizeof(struct HksParamSet) + sizeof(struct HksBlob) * CERT_COUNT)) {
32 return false;
33 }
34
35 uint8_t *myData = static_cast<uint8_t *>(HksMalloc(sizeof(uint8_t) * size));
36 if (myData == nullptr) {
37 return false;
38 }
39
40 (void)memcpy_s(myData, size, data, size);
41
42 struct HksBlob keyAlias = { BLOB_SIZE, myData };
43
44 struct HksCertChain *certChain =
45 reinterpret_cast<struct HksCertChain *>(HksMalloc(sizeof(struct HksCertChain)));
46 certChain->certsCount = CERT_COUNT;
47 certChain->certs = reinterpret_cast<struct HksBlob *>(myData + BLOB_SIZE);
48
49 struct HksParamSet *paramSet =
50 reinterpret_cast<struct HksParamSet *>(myData + BLOB_SIZE + sizeof(struct HksBlob) * CERT_COUNT);
51 paramSet->paramSetSize = size - BLOB_SIZE - sizeof(struct HksBlob) * CERT_COUNT;
52
53 (void)HksAttestKey(&keyAlias, paramSet, certChain);
54
55 if (certChain != nullptr) {
56 HksFree(certChain);
57 }
58
59 HksFree(myData);
60 return true;
61 }
62 }
63
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)64 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
65 {
66 OHOS::DoSomethingInterestingWithMyAPI(data, size);
67 return 0;
68 }
69