1  // Copyright (c) 2020-present The Bitcoin Core developers
 2  // Distributed under the MIT software license, see the accompanying
 3  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 4  
 5  #include <crypto/hkdf_sha256_32.h>
 6  #include <test/fuzz/FuzzedDataProvider.h>
 7  #include <test/fuzz/fuzz.h>
 8  #include <test/fuzz/util.h>
 9  
10  #include <cstdint>
11  #include <string>
12  #include <vector>
13  
14  FUZZ_TARGET(crypto_hkdf_hmac_sha256_l32)
15  {
16      FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
17  
18      const std::vector<uint8_t> initial_key_material = ConsumeRandomLengthByteVector(fuzzed_data_provider);
19  
20      CHKDF_HMAC_SHA256_L32 hkdf_hmac_sha256_l32(initial_key_material.data(), initial_key_material.size(), fuzzed_data_provider.ConsumeRandomLengthString(1024));
21      LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 10000) {
22          std::vector<uint8_t> out(32);
23          hkdf_hmac_sha256_l32.Expand32(fuzzed_data_provider.ConsumeRandomLengthString(128), out.data());
24      }
25  }