Line data    Source code

       1             : // Copyright (c) 2020 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 <key.h>
       6             : #include <secp256k1.h>
       7             : #include <test/fuzz/FuzzedDataProvider.h>
       8             : #include <test/fuzz/fuzz.h>
       9             : #include <test/fuzz/util.h>
      10             : 
      11             : #include <cstdint>
      12             : #include <vector>
      13             : 
      14             : bool SigHasLowR(const secp256k1_ecdsa_signature* sig);
      15             : int ecdsa_signature_parse_der_lax(secp256k1_ecdsa_signature* sig, const unsigned char* input, size_t inputlen);
      16             : 
      17           4 : FUZZ_TARGET(secp256k1_ecdsa_signature_parse_der_lax)
      18             : {
      19           0 :     FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
      20           0 :     const std::vector<uint8_t> signature_bytes = ConsumeRandomLengthByteVector(fuzzed_data_provider);
      21           0 :     if (signature_bytes.data() == nullptr) {
      22           0 :         return;
      23             :     }
      24             :     secp256k1_ecdsa_signature sig_der_lax;
      25           2 :     const bool parsed_der_lax = ecdsa_signature_parse_der_lax(&sig_der_lax, signature_bytes.data(), signature_bytes.size()) == 1;
      26           0 :     if (parsed_der_lax) {
      27           0 :         ECC_Start();
      28           0 :         (void)SigHasLowR(&sig_der_lax);
      29           0 :         ECC_Stop();
      30           0 :     }
      31           0 : }