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 "hksgetcertificatechain_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 CERT_COUNT = 4;
27
28 namespace OHOS {
DoSomethingInterestingWithMyAPI(const uint8_t * data,size_t size)29 bool DoSomethingInterestingWithMyAPI(const uint8_t* data, size_t size)
30 {
31 if (data == nullptr ||
32 size <= (BLOB_SIZE + sizeof(struct HksParamSet) + sizeof(struct HksBlob) * CERT_COUNT)) {
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 keyAlias = { BLOB_SIZE, myData };
44
45 struct HksCertChain *certChain =
46 reinterpret_cast<struct HksCertChain *>(HksMalloc(sizeof(struct HksCertChain)));
47 certChain->certsCount = CERT_COUNT;
48 certChain->certs = reinterpret_cast<struct HksBlob *>(myData + BLOB_SIZE);
49
50 struct HksParamSet *paramSet =
51 reinterpret_cast<struct HksParamSet *>(myData + BLOB_SIZE + sizeof(struct HksBlob) * CERT_COUNT);
52 paramSet->paramSetSize = size - BLOB_SIZE - sizeof(struct HksBlob) * CERT_COUNT;
53
54 (void)HksGetCertificateChain(&keyAlias, paramSet, certChain);
55
56 if (certChain != nullptr) {
57 HksFree(certChain);
58 }
59
60 HksFree(myData);
61 return true;
62 }
63 }
64
65 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)66 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
67 {
68 /* Run your code on data */
69 OHOS::DoSomethingInterestingWithMyAPI(data, size);
70 return 0;
71 }
72
73