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       1                 :             : // Copyright (c) 2020-2021 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         [ #  # ]:           0 : FUZZ_TARGET(crypto_hkdf_hmac_sha256_l32)
      15                 :             : {
      16                 :           0 :     FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
      17                 :             : 
      18                 :           0 :     const std::vector<uint8_t> initial_key_material = ConsumeRandomLengthByteVector(fuzzed_data_provider);
      19                 :             : 
      20   [ #  #  #  # ]:           0 :     CHKDF_HMAC_SHA256_L32 hkdf_hmac_sha256_l32(initial_key_material.data(), initial_key_material.size(), fuzzed_data_provider.ConsumeRandomLengthString(1024));
      21   [ #  #  #  # ]:           0 :     LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 10000) {
      22         [ #  # ]:           0 :         std::vector<uint8_t> out(32);
      23   [ #  #  #  # ]:           0 :         hkdf_hmac_sha256_l32.Expand32(fuzzed_data_provider.ConsumeRandomLengthString(128), out.data());
      24                 :           0 :     }
      25                 :           0 : }