1 /*
2 * Copyright (c) 2024 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 <cstddef>
17 #include <cstdint>
18 #include "key_store_helper.h"
19 #include "cert_tools.h"
20
21 namespace OHOS {
22 namespace SignatureTools {
DoSomethingInterestingWithMyAPI(const uint8_t * data,size_t size)23 bool DoSomethingInterestingWithMyAPI(const uint8_t* data, size_t size)
24 {
25 int keySize = 256;
26 std::string algorithm = "ECC";
27 std::string signAlgorithm = "SHA256withECDSA";
28 std::string subject = std::string(reinterpret_cast<const char*>(data), size);
29 KeyStoreHelper keyStoreHelper;
30 EVP_PKEY* keyPair = keyStoreHelper.GenerateKeyPair(algorithm, keySize);
31 if (!keyPair) {
32 return false;
33 }
34
35 X509_REQ* csr = CertTools::GenerateCsr(keyPair, signAlgorithm, subject);
36 std::string csrStr;
37 if (csr) {
38 csrStr = CertTools::CsrToString(csr);
39 X509_REQ_free(csr);
40 }
41 if (keyPair) {
42 EVP_PKEY_free(keyPair);
43 }
44 return csrStr.size() != 0;
45 }
46 }
47 }
48
49 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)50 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
51 {
52 /* Run your code on data */
53 OHOS::SignatureTools::DoSomethingInterestingWithMyAPI(data, size);
54 return 0;
55 }