1  // Copyright (c) 2019-present 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 <util/hasher.h>
 6  
 7  #include <crypto/siphash.h>
 8  #include <random.h>
 9  
10  SaltedUint256Hasher::SaltedUint256Hasher() : m_hasher{
11      FastRandomContext().rand64(),
12      FastRandomContext().rand64()}
13  {}
14  
15  SaltedTxidHasher::SaltedTxidHasher() : m_hasher{
16      FastRandomContext().rand64(),
17      FastRandomContext().rand64()}
18  {}
19  
20  SaltedWtxidHasher::SaltedWtxidHasher() : m_hasher{
21      FastRandomContext().rand64(),
22      FastRandomContext().rand64()}
23  {}
24  
25  SaltedOutpointHasher::SaltedOutpointHasher(bool deterministic) : m_hasher{
26      deterministic ? 0x8e819f2607a18de6 : FastRandomContext().rand64(),
27      deterministic ? 0xf4020d2e3983b0eb : FastRandomContext().rand64()}
28  {}
29  
30  SaltedSipHasher::SaltedSipHasher() :
31      m_k0{FastRandomContext().rand64()},
32      m_k1{FastRandomContext().rand64()}
33  {}
34  
35  size_t SaltedSipHasher::operator()(const std::span<const unsigned char>& script) const
36  {
37      return CSipHasher(m_k0, m_k1).Write(script).Finalize();
38  }