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9ca52a4cbe
Replaces standalone `SipHashUint256` with an `operator()` overload in `PresaltedSipHasher`. Updates all hasher classes (`SaltedUint256Hasher`, `SaltedTxidHasher`, `SaltedWtxidHasher`) to use `PresaltedSipHasher` internally, enabling the same constant-state caching optimization while keeping behavior unchanged. Benchmark was also adjusted to cache the salting part.
39 lines
1.1 KiB
C++
39 lines
1.1 KiB
C++
// Copyright (c) 2019-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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#include <crypto/siphash.h>
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#include <random.h>
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#include <span.h>
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#include <util/hasher.h>
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SaltedUint256Hasher::SaltedUint256Hasher() : m_hasher{
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FastRandomContext().rand64(),
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FastRandomContext().rand64()}
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{}
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SaltedTxidHasher::SaltedTxidHasher() : m_hasher{
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FastRandomContext().rand64(),
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FastRandomContext().rand64()}
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{}
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SaltedWtxidHasher::SaltedWtxidHasher() : m_hasher{
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FastRandomContext().rand64(),
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FastRandomContext().rand64()}
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{}
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SaltedOutpointHasher::SaltedOutpointHasher(bool deterministic) : m_hasher{
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deterministic ? 0x8e819f2607a18de6 : FastRandomContext().rand64(),
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deterministic ? 0xf4020d2e3983b0eb : FastRandomContext().rand64()}
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{}
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SaltedSipHasher::SaltedSipHasher() :
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m_k0{FastRandomContext().rand64()},
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m_k1{FastRandomContext().rand64()}
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{}
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size_t SaltedSipHasher::operator()(const std::span<const unsigned char>& script) const
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{
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return CSipHasher(m_k0, m_k1).Write(script).Finalize();
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}
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