Line data    Source code

       1             : // Copyright (c) 2009-2010 Satoshi Nakamoto
       2             : // Copyright (c) 2009-2021 The Bitcoin Core developers
       3             : // Distributed under the MIT software license, see the accompanying
       4             : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
       5             : 
       6             : #ifndef BITCOIN_SCRIPT_SIGCACHE_H
       7             : #define BITCOIN_SCRIPT_SIGCACHE_H
       8             : 
       9             : #include <script/interpreter.h>
      10             : #include <util/hasher.h>
      11             : 
      12             : #include <vector>
      13             : 
      14             : // DoS prevention: limit cache size to 32MB (over 1000000 entries on 64-bit
      15             : // systems). Due to how we count cache size, actual memory usage is slightly
      16             : // more (~32.25 MB)
      17             : static const unsigned int DEFAULT_MAX_SIG_CACHE_SIZE = 32;
      18             : // Maximum sig cache size allowed
      19             : static const int64_t MAX_MAX_SIG_CACHE_SIZE = 16384;
      20             : 
      21             : class CPubKey;
      22             : 
      23             : class CachingTransactionSignatureChecker : public TransactionSignatureChecker
      24             : {
      25             : private:
      26             :     bool store;
      27             : 
      28             : public:
      29      709634 :     CachingTransactionSignatureChecker(const CTransaction* txToIn, unsigned int nInIn, const CAmount& amount, PrecomputedTransactionData& txdataIn, bool storeIn=true) : TransactionSignatureChecker(txToIn, nInIn, amount, txdataIn, MissingDataBehavior::ASSERT_FAIL), store(storeIn) {}
      30             : 
      31             :     bool VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& vchPubKey, const uint256& sighash) const override;
      32             : };
      33             : 
      34             : void InitSignatureCache();
      35             : 
      36             : #endif // BITCOIN_SCRIPT_SIGCACHE_H