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Historically, the headers have been bumped some time after a file has been touched. Do it now to avoid having to touch them again in the future for that reason. -BEGIN VERIFY SCRIPT- sed -i --regexp-extended 's;( 20[0-2][0-9])(-20[0-2][0-9])? The Bitcoin Core developers;\1-present The Bitcoin Core developers;g' $( git show --pretty="" --name-only HEAD~1 ) -END VERIFY SCRIPT-
77 lines
3.0 KiB
C++
77 lines
3.0 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-present The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_SCRIPT_SIGCACHE_H
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#define BITCOIN_SCRIPT_SIGCACHE_H
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#include <consensus/amount.h>
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#include <crypto/sha256.h>
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#include <cuckoocache.h>
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#include <script/interpreter.h>
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#include <span.h>
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#include <uint256.h>
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#include <util/hasher.h>
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#include <cstddef>
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#include <shared_mutex>
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#include <vector>
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class CPubKey;
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class CTransaction;
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class XOnlyPubKey;
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// DoS prevention: limit cache size to 32MiB (over 1000000 entries on 64-bit
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// systems). Due to how we count cache size, actual memory usage is slightly
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// more (~32.25 MiB)
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static constexpr size_t DEFAULT_VALIDATION_CACHE_BYTES{32 << 20};
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static constexpr size_t DEFAULT_SIGNATURE_CACHE_BYTES{DEFAULT_VALIDATION_CACHE_BYTES / 2};
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static constexpr size_t DEFAULT_SCRIPT_EXECUTION_CACHE_BYTES{DEFAULT_VALIDATION_CACHE_BYTES / 2};
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static_assert(DEFAULT_VALIDATION_CACHE_BYTES == DEFAULT_SIGNATURE_CACHE_BYTES + DEFAULT_SCRIPT_EXECUTION_CACHE_BYTES);
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/**
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* Valid signature cache, to avoid doing expensive ECDSA signature checking
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* twice for every transaction (once when accepted into memory pool, and
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* again when accepted into the block chain)
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*/
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class SignatureCache
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{
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private:
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//! Entries are SHA256(nonce || 'E' or 'S' || 31 zero bytes || signature hash || public key || signature):
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CSHA256 m_salted_hasher_ecdsa;
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CSHA256 m_salted_hasher_schnorr;
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typedef CuckooCache::cache<uint256, SignatureCacheHasher> map_type;
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map_type setValid;
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std::shared_mutex cs_sigcache;
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public:
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SignatureCache(size_t max_size_bytes);
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SignatureCache(const SignatureCache&) = delete;
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SignatureCache& operator=(const SignatureCache&) = delete;
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void ComputeEntryECDSA(uint256& entry, const uint256 &hash, const std::vector<unsigned char>& vchSig, const CPubKey& pubkey) const;
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void ComputeEntrySchnorr(uint256& entry, const uint256 &hash, std::span<const unsigned char> sig, const XOnlyPubKey& pubkey) const;
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bool Get(const uint256& entry, const bool erase);
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void Set(const uint256& entry);
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};
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class CachingTransactionSignatureChecker : public TransactionSignatureChecker
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{
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private:
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bool store;
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SignatureCache& m_signature_cache;
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public:
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CachingTransactionSignatureChecker(const CTransaction* txToIn, unsigned int nInIn, const CAmount& amountIn, bool storeIn, SignatureCache& signature_cache, PrecomputedTransactionData& txdataIn) : TransactionSignatureChecker(txToIn, nInIn, amountIn, txdataIn, MissingDataBehavior::ASSERT_FAIL), store(storeIn), m_signature_cache(signature_cache) {}
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bool VerifyECDSASignature(const std::vector<unsigned char>& vchSig, const CPubKey& vchPubKey, const uint256& sighash) const override;
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bool VerifySchnorrSignature(std::span<const unsigned char> sig, const XOnlyPubKey& pubkey, const uint256& sighash) const override;
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};
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#endif // BITCOIN_SCRIPT_SIGCACHE_H
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