aes_gcm.hpp File Reference

AES-256-GCM authenticated encryption (NIST SP 800-38D). More...

#include "signet/crypto/aes_core.hpp"
#include "signet/error.hpp"
#include <cstddef>
#include <cstdint>
#include <cstring>
#include <vector>

Go to the source code of this file.

Classes
struct	signet::forge::crypto::detail::gcm::Block128
	128-bit value stored as two big-endian uint64_t halves. More...
struct	signet::forge::crypto::detail::gcm::GHashTable
	4-bit precomputed table for constant-time GHASH multiplication. More...
class	signet::forge::crypto::AesGcm
	AES-256 in Galois/Counter Mode (GCM) as specified in NIST SP 800-38D. More...

Namespaces
namespace	signet
namespace	signet::forge
namespace	signet::forge::crypto
namespace	signet::forge::crypto::detail
namespace	signet::forge::crypto::detail::gcm

Functions
Block128	signet::forge::crypto::detail::gcm::load_block (const uint8_t src[16])
	Load a 16-byte array into a Block128 (big-endian byte order).
void	signet::forge::crypto::detail::gcm::store_block (uint8_t dst[16], const Block128 &b)
	Store a Block128 into a 16-byte array (big-endian byte order).
Block128	signet::forge::crypto::detail::gcm::xor_blocks (const Block128 &a, const Block128 &b)
	XOR two Block128 values.
Block128	signet::forge::crypto::detail::gcm::gf128_double (const Block128 &V)
	"Doubling" in GF(2^128): multiply by x (shift right by 1 in GCM bit ordering).
Block128	signet::forge::crypto::detail::gcm::ct_table_lookup (const Block128 table[16], uint8_t index)
	Constant-time 16-entry Block128 table lookup.
uint64_t	signet::forge::crypto::detail::gcm::ct_reduce4 (uint8_t index)
	Constant-time 4-bit reduction table lookup.
uint8_t	signet::forge::crypto::detail::gcm::rev4 (uint8_t n)
	Bit-reverse a 4-bit nibble value.
Block128	signet::forge::crypto::detail::gcm::gf128_mul_ct (const GHashTable &table, const Block128 &X)
	Constant-time GF(2^128) multiplication using the 4-bit precomputed table.
Block128	signet::forge::crypto::detail::gcm::gf128_mul (const Block128 &X, const Block128 &Y)
	Multiply two elements in GF(2^128) using the schoolbook algorithm.
Block128	signet::forge::crypto::detail::gcm::ghash (const Block128 &H, const uint8_t *data, size_t data_size)
	GHASH: Compute the GHASH function over data using hash subkey H.
void	signet::forge::crypto::detail::gcm::inc32 (uint8_t counter[16])
	Increment the rightmost 32 bits of a 16-byte counter block (big-endian).
void	signet::forge::crypto::detail::gcm::gctr (const Aes256 &cipher, const uint8_t icb[16], const uint8_t *input, size_t input_size, uint8_t *output)
	GCTR: AES-CTR encryption with the given initial counter block.

Detailed Description

AES-256-GCM authenticated encryption (NIST SP 800-38D).

Definition in file aes_gcm.hpp.