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 #include "hks_fuzz_util.h"
26
27 constexpr int ALIAS_SIZE = 10;
28 constexpr int CERT_SIZE = 4096;
29 constexpr int CERT_COUNT = 4;
30
31 namespace OHOS {
32 namespace Security {
33 namespace Hks {
34
DoSomethingInterestingWithMyAPI(uint8_t * data,size_t size)35 int DoSomethingInterestingWithMyAPI(uint8_t *data, size_t size)
36 {
37 if (data == nullptr || size < ALIAS_SIZE) {
38 return -1;
39 }
40
41 struct HksBlob keyAlias = { ALIAS_SIZE, ReadData<uint8_t *>(data, size, ALIAS_SIZE) };
42 std::vector<uint8_t> certRootBuffer(CERT_SIZE);
43 std::vector<uint8_t> certCaBuffer(CERT_SIZE);
44 std::vector<uint8_t> certDeviceBuffer(CERT_SIZE);
45 std::vector<uint8_t> certAppBuffer(CERT_SIZE);
46 struct HksBlob resultCerts[CERT_COUNT] = {
47 { CERT_SIZE, certRootBuffer.data() },
48 { CERT_SIZE, certCaBuffer.data() },
49 { CERT_SIZE, certDeviceBuffer.data() },
50 { CERT_SIZE, certAppBuffer.data() },
51 };
52 struct HksCertChain certChain = {
53 .certs = resultCerts,
54 .certsCount = CERT_COUNT
55 };
56
57 WrapParamSet ps = ConstructHksParamSetFromFuzz(data, size);
58
59 [[maybe_unused]] int ret = HksGetCertificateChain(&keyAlias, ps.s, &certChain);
60
61 return 0;
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 std::vector<uint8_t> v(data, data + size);
69 return OHOS::Security::Hks::DoSomethingInterestingWithMyAPI(v.data(), v.size());
70 }
71
72