hashers.hpp

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// === AUDIT STATUS ===
// internal:    { status: not started, auditors: [], date: YYYY-MM-DD }
// external_1:  { status: not started, auditors: [], date: YYYY-MM-DD }
// external_2:  { status: not started, auditors: [], date: YYYY-MM-DD }
// =====================
 
#pragma once
 
#include "../blake2s/blake2s.hpp"
#include "../keccak/keccak.hpp"
#include "../sha256/sha256.hpp"
 
#include "memory.h"
#include <vector>
 
namespace bb::crypto {
struct KeccakHasher {
    static constexpr size_t BLOCK_SIZE = 64;
    static constexpr size_t OUTPUT_SIZE = 32;
    static std::vector<uint8_t> hash(const std::vector<uint8_t>& message)
    {
        keccak256 hash_result = ethash_keccak256(&message[0], message.size());
 
        std::vector<uint8_t> output;
        output.resize(32);
 
        memcpy((void*)&output[0], (void*)&hash_result.word64s[0], 32);
        return output;
    }
};
 
struct Sha256Hasher {
    static constexpr size_t BLOCK_SIZE = 64;
    static constexpr size_t OUTPUT_SIZE = 32;
 
    template <typename B = std::vector<uint8_t>> static auto hash(const B& message) { return sha256(message); }
};
 
struct Blake2sHasher {
    static constexpr size_t BLOCK_SIZE = 64;
    static constexpr size_t OUTPUT_SIZE = 32;
    static auto hash(const std::vector<uint8_t>& message) { return blake2s(message); }
};
} // namespace bb::crypto