Bitcoin Core  24.99.0
P2P Digital Currency
hasher.cpp
Go to the documentation of this file.
1 // Copyright (c) 2019-2022 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 SaltedTxidHasher::SaltedTxidHasher() : k0(GetRand<uint64_t>()), k1(GetRand<uint64_t>()) {}
11 
12 SaltedOutpointHasher::SaltedOutpointHasher() : k0(GetRand<uint64_t>()), k1(GetRand<uint64_t>()) {}
13 
14 SaltedSipHasher::SaltedSipHasher() : m_k0(GetRand<uint64_t>()), m_k1(GetRand<uint64_t>()) {}
15 
17 {
18  return CSipHasher(m_k0, m_k1).Write(script.data(), script.size()).Finalize();
19 }
static const unsigned char k1[32]
SipHash-2-4.
Definition: siphash.h:14
uint64_t Finalize() const
Compute the 64-bit SipHash-2-4 of the data written so far.
Definition: siphash.cpp:76
CSipHasher & Write(uint64_t data)
Hash a 64-bit integer worth of data It is treated as if this was the little-endian interpretation of ...
Definition: siphash.cpp:28
size_t operator()(const Span< const unsigned char > &script) const
Definition: hasher.cpp:16
const uint64_t m_k0
Salt.
Definition: hasher.h:93
const uint64_t m_k1
Definition: hasher.h:93
constexpr std::size_t size() const noexcept
Definition: span.h:186
constexpr C * data() const noexcept
Definition: span.h:173
T GetRand(T nMax=std::numeric_limits< T >::max()) noexcept
Generate a uniform random integer of type T in the range [0..nMax) nMax defaults to std::numeric_limi...
Definition: random.h:80