Bitcoin Core  27.99.0
P2P Digital Currency
siphash.h
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1 // Copyright (c) 2016-2020 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 #ifndef BITCOIN_CRYPTO_SIPHASH_H
6 #define BITCOIN_CRYPTO_SIPHASH_H
7 
8 #include <stdint.h>
9 
10 #include <span.h>
11 #include <uint256.h>
12 
15 {
16 private:
17  uint64_t v[4];
18  uint64_t tmp;
19  uint8_t count; // Only the low 8 bits of the input size matter.
20 
21 public:
23  CSipHasher(uint64_t k0, uint64_t k1);
28  CSipHasher& Write(uint64_t data);
32  uint64_t Finalize() const;
33 };
34 
45 uint64_t SipHashUint256(uint64_t k0, uint64_t k1, const uint256& val);
46 uint64_t SipHashUint256Extra(uint64_t k0, uint64_t k1, const uint256& val, uint32_t extra);
47 
48 #endif // BITCOIN_CRYPTO_SIPHASH_H
SipHash-2-4.
Definition: siphash.h:15
uint64_t v[4]
Definition: siphash.h:17
uint64_t Finalize() const
Compute the 64-bit SipHash-2-4 of the data written so far.
Definition: siphash.cpp:77
CSipHasher(uint64_t k0, uint64_t k1)
Construct a SipHash calculator initialized with 128-bit key (k0, k1)
Definition: siphash.cpp:18
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
uint64_t tmp
Definition: siphash.h:18
uint8_t count
Definition: siphash.h:19
256-bit opaque blob.
Definition: uint256.h:106
uint64_t SipHashUint256Extra(uint64_t k0, uint64_t k1, const uint256 &val, uint32_t extra)
Definition: siphash.cpp:135
uint64_t SipHashUint256(uint64_t k0, uint64_t k1, const uint256 &val)
Optimized SipHash-2-4 implementation for uint256.
Definition: siphash.cpp:95