sha256.hpp File Reference

SHA-256 hash function (NIST FIPS 180-4). More...

#include <array>
#include <cstddef>
#include <cstdint>
#include <cstring>
#include <vector>

Go to the source code of this file.

Namespaces
namespace	signet
namespace	signet::forge
namespace	signet::forge::crypto
namespace	signet::forge::crypto::detail
namespace	signet::forge::crypto::detail::sha256

Functions
constexpr uint32_t	signet::forge::crypto::detail::sha256::rotr (uint32_t x, int n)
	Right-rotate a 32-bit word by n bits.
constexpr uint32_t	signet::forge::crypto::detail::sha256::Ch (uint32_t x, uint32_t y, uint32_t z)
	SHA-256 logical functions (FIPS 180-4 Section 4.1.2)
constexpr uint32_t	signet::forge::crypto::detail::sha256::Maj (uint32_t x, uint32_t y, uint32_t z)
constexpr uint32_t	signet::forge::crypto::detail::sha256::Sigma0 (uint32_t x)
constexpr uint32_t	signet::forge::crypto::detail::sha256::Sigma1 (uint32_t x)
constexpr uint32_t	signet::forge::crypto::detail::sha256::sigma0 (uint32_t x)
constexpr uint32_t	signet::forge::crypto::detail::sha256::sigma1 (uint32_t x)
uint32_t	signet::forge::crypto::detail::sha256::load_be32 (const uint8_t *p)
	Load a big-endian uint32 from 4 bytes.
void	signet::forge::crypto::detail::sha256::store_be32 (uint8_t *p, uint32_t v)
	Store a uint32 as 4 big-endian bytes.
void	signet::forge::crypto::detail::sha256::store_be64 (uint8_t *p, uint64_t v)
	Store a uint64 as 8 big-endian bytes.
void	signet::forge::crypto::detail::sha256::compress (uint32_t h[8], const uint8_t block[64])
	Process a single 64-byte (512-bit) message block.
std::array< uint8_t, 32 >	signet::forge::crypto::detail::sha256::sha256 (const uint8_t *data, size_t size)
	Compute SHA-256 hash of arbitrary-length input.
std::array< uint8_t, 32 >	signet::forge::crypto::detail::sha256::sha256 (const std::vector< uint8_t > &data)
	Convenience overload: hash a vector of bytes.
std::array< uint8_t, 32 >	signet::forge::crypto::detail::sha256::sha256_concat (const uint8_t *a, size_t a_size, const uint8_t *b, size_t b_size)
	Hash concatenation of two byte spans with domain separation: SHA-256(label || a || b).

Detailed Description

SHA-256 hash function (NIST FIPS 180-4).

Public-standard cryptographic hash — no proprietary IP. Extracted for clean tier separation: Tier 1 (AGPL-3.0-or-later) consumers (hkdf.hpp, audit_chain.hpp, row_lineage.hpp) can use SHA-256 without depending on any commercial or proprietary header.

Reference: NIST FIPS 180-4 — Secure Hash Standard (SHS)

Definition in file sha256.hpp.