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             : int ec_seckey_import_der(const secp256k1_context* ctx, unsigned char* out32, const unsigned char* seckey, size_t seckeylen);
      15             : int ec_seckey_export_der(const secp256k1_context* ctx, unsigned char* seckey, size_t* seckeylen, const unsigned char* key32, bool compressed);
      16             : 
      17           4 : FUZZ_TARGET(secp256k1_ec_seckey_import_export_der)
      18             : {
      19           0 :     FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
      20           0 :     secp256k1_context* secp256k1_context_sign = secp256k1_context_create(SECP256K1_CONTEXT_SIGN);
      21             :     {
      22           0 :         std::vector<uint8_t> out32(32);
      23           0 :         (void)ec_seckey_import_der(secp256k1_context_sign, out32.data(), ConsumeFixedLengthByteVector(fuzzed_data_provider, CKey::SIZE).data(), CKey::SIZE);
      24           0 :     }
      25           2 :     {
      26           0 :         std::vector<uint8_t> seckey(CKey::SIZE);
      27           0 :         const std::vector<uint8_t> key32 = ConsumeFixedLengthByteVector(fuzzed_data_provider, 32);
      28           0 :         size_t seckeylen = CKey::SIZE;
      29           0 :         const bool compressed = fuzzed_data_provider.ConsumeBool();
      30           0 :         const bool exported = ec_seckey_export_der(secp256k1_context_sign, seckey.data(), &seckeylen, key32.data(), compressed);
      31           0 :         if (exported) {
      32           0 :             std::vector<uint8_t> out32(32);
      33           0 :             const bool imported = ec_seckey_import_der(secp256k1_context_sign, out32.data(), seckey.data(), seckey.size()) == 1;
      34           0 :             assert(imported && key32 == out32);
      35           0 :         }
      36           0 :     }
      37           0 :     secp256k1_context_destroy(secp256k1_context_sign);
      38           0 : }