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 <crypto/siphash.h>
 6  #include <random.h>
 7  #include <span.h>
 8  #include <util/hasher.h>
 9  
10  SaltedUint256Hasher::SaltedUint256Hasher() :
11      k0{FastRandomContext().rand64()},
12      k1{FastRandomContext().rand64()} {}
13  
14  SaltedTxidHasher::SaltedTxidHasher() :
15      k0{FastRandomContext().rand64()},
16      k1{FastRandomContext().rand64()} {}
17  
18  SaltedWtxidHasher::SaltedWtxidHasher() :
19      k0{FastRandomContext().rand64()},
20      k1{FastRandomContext().rand64()} {}
21  
22  SaltedOutpointHasher::SaltedOutpointHasher(bool deterministic) :
23      k0{deterministic ? 0x8e819f2607a18de6 : FastRandomContext().rand64()},
24      k1{deterministic ? 0xf4020d2e3983b0eb : FastRandomContext().rand64()}
25  {}
26  
27  SaltedSipHasher::SaltedSipHasher() :
28      m_k0{FastRandomContext().rand64()},
29      m_k1{FastRandomContext().rand64()} {}
30  
31  size_t SaltedSipHasher::operator()(const std::span<const unsigned char>& script) const
32  {
33      return CSipHasher(m_k0, m_k1).Write(script).Finalize();
34  }