LCOV - code coverage report
Current view: top level - src/crypto - sha3.h (source / functions) Hit Total Coverage
Test: fuzz_coverage.info Lines: 4 4 100.0 %
Date: 2023-10-05 12:38:51 Functions: 1 1 100.0 %
Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : // Copyright (c) 2020-2022 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                 :            : #ifndef BITCOIN_CRYPTO_SHA3_H
       6                 :            : #define BITCOIN_CRYPTO_SHA3_H
       7                 :            : 
       8                 :            : #include <span.h>
       9                 :            : 
      10                 :            : #include <cstdlib>
      11                 :            : #include <stdint.h>
      12                 :            : 
      13                 :            : //! The Keccak-f[1600] transform.
      14                 :            : void KeccakF(uint64_t (&st)[25]);
      15                 :            : 
      16                 :            : class SHA3_256
      17                 :            : {
      18                 :            : private:
      19                 :       4097 :     uint64_t m_state[25] = {0};
      20                 :            :     unsigned char m_buffer[8];
      21                 :       4097 :     unsigned m_bufsize = 0;
      22                 :       4097 :     unsigned m_pos = 0;
      23                 :            : 
      24                 :            :     //! Sponge rate in bits.
      25                 :            :     static constexpr unsigned RATE_BITS = 1088;
      26                 :            : 
      27                 :            :     //! Sponge rate expressed as a multiple of the buffer size.
      28                 :            :     static constexpr unsigned RATE_BUFFERS = RATE_BITS / (8 * sizeof(m_buffer));
      29                 :            : 
      30                 :            :     static_assert(RATE_BITS % (8 * sizeof(m_buffer)) == 0, "Rate must be a multiple of 8 bytes");
      31                 :            : 
      32                 :            : public:
      33                 :            :     static constexpr size_t OUTPUT_SIZE = 32;
      34                 :            : 
      35                 :       8194 :     SHA3_256() {}
      36                 :            :     SHA3_256& Write(Span<const unsigned char> data);
      37                 :            :     SHA3_256& Finalize(Span<unsigned char> output);
      38                 :            :     SHA3_256& Reset();
      39                 :            : };
      40                 :            : 
      41                 :            : #endif // BITCOIN_CRYPTO_SHA3_H

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