Bitcoin ABC  0.22.12
P2P Digital Currency
siphash.h
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1 // Copyright (c) 2016-2018 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 <uint256.h>
9 
10 #include <cstdint>
11 
13 class CSipHasher {
14 private:
15  uint64_t v[4];
16  uint64_t tmp;
17  int count;
18 
19 public:
21  CSipHasher(uint64_t k0, uint64_t k1);
28  CSipHasher &Write(uint64_t data);
30  CSipHasher &Write(const uint8_t *data, size_t size);
33  uint64_t Finalize() const;
34 };
35 
46 uint64_t SipHashUint256(uint64_t k0, uint64_t k1, const uint256 &val);
47 uint64_t SipHashUint256Extra(uint64_t k0, uint64_t k1, const uint256 &val,
48  uint32_t extra);
49 
50 #endif // BITCOIN_CRYPTO_SIPHASH_H
uint64_t v[4]
Definition: siphash.h:15
CSipHasher & Write(uint64_t data)
Hash a 64-bit integer worth of data.
Definition: siphash.cpp:36
uint64_t SipHashUint256(uint64_t k0, uint64_t k1, const uint256 &val)
Optimized SipHash-2-4 implementation for uint256.
Definition: siphash.cpp:99
CSipHasher(uint64_t k0, uint64_t k1)
Construct a SipHash calculator initialized with 128-bit key (k0, k1)
Definition: siphash.cpp:27
int count
Definition: siphash.h:17
uint64_t Finalize() const
Compute the 64-bit SipHash-2-4 of the data written so far.
Definition: siphash.cpp:82
static const uint8_t k1[32]
uint64_t tmp
Definition: siphash.h:16
256-bit opaque blob.
Definition: uint256.h:120
SipHash-2-4.
Definition: siphash.h:13
uint64_t SipHashUint256Extra(uint64_t k0, uint64_t k1, const uint256 &val, uint32_t extra)
Definition: siphash.cpp:138