Commit f606a88e authored by Ondrej Mosnacek's avatar Ondrej Mosnacek Committed by Herbert Xu

crypto: aegis - Add generic AEGIS AEAD implementations

This patch adds the generic implementation of the AEGIS family of AEAD
algorithms (AEGIS-128, AEGIS-128L, and AEGIS-256). The original
authors of AEGIS are Hongjun Wu and Bart Preneel.

At the time of writing, AEGIS is one of the finalists in CAESAR, an
open competition intended to select a portfolio of alternatives to
the problematic AES-GCM:

https://competitions.cr.yp.to/caesar-submissions.html
https://competitions.cr.yp.to/round3/aegisv11.pdfSigned-off-by: 's avatarOndrej Mosnacek <omosnacek@gmail.com>
Signed-off-by: 's avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 15f47ce5
......@@ -289,6 +289,27 @@ config CRYPTO_CHACHA20POLY1305
with the Poly1305 authenticator. It is defined in RFC7539 for use in
IETF protocols.
config CRYPTO_AEGIS128
tristate "AEGIS-128 AEAD algorithm"
select CRYPTO_AEAD
select CRYPTO_AES # for AES S-box tables
help
Support for the AEGIS-128 dedicated AEAD algorithm.
config CRYPTO_AEGIS128L
tristate "AEGIS-128L AEAD algorithm"
select CRYPTO_AEAD
select CRYPTO_AES # for AES S-box tables
help
Support for the AEGIS-128L dedicated AEAD algorithm.
config CRYPTO_AEGIS256
tristate "AEGIS-256 AEAD algorithm"
select CRYPTO_AEAD
select CRYPTO_AES # for AES S-box tables
help
Support for the AEGIS-256 dedicated AEAD algorithm.
config CRYPTO_SEQIV
tristate "Sequence Number IV Generator"
select CRYPTO_AEAD
......
......@@ -86,6 +86,9 @@ obj-$(CONFIG_CRYPTO_KEYWRAP) += keywrap.o
obj-$(CONFIG_CRYPTO_GCM) += gcm.o
obj-$(CONFIG_CRYPTO_CCM) += ccm.o
obj-$(CONFIG_CRYPTO_CHACHA20POLY1305) += chacha20poly1305.o
obj-$(CONFIG_CRYPTO_AEGIS128) += aegis128.o
obj-$(CONFIG_CRYPTO_AEGIS128L) += aegis128l.o
obj-$(CONFIG_CRYPTO_AEGIS256) += aegis256.o
obj-$(CONFIG_CRYPTO_PCRYPT) += pcrypt.o
obj-$(CONFIG_CRYPTO_CRYPTD) += cryptd.o
obj-$(CONFIG_CRYPTO_MCRYPTD) += mcryptd.o
......
/* SPDX-License-Identifier: GPL-2.0 */
/*
* AEGIS common definitions
*
* Copyright (c) 2018 Ondrej Mosnacek <omosnacek@gmail.com>
* Copyright (c) 2018 Red Hat, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*/
#ifndef _CRYPTO_AEGIS_H
#define _CRYPTO_AEGIS_H
#include <crypto/aes.h>
#include <linux/types.h>
#define AEGIS_BLOCK_SIZE 16
union aegis_block {
__le64 words64[AEGIS_BLOCK_SIZE / sizeof(__le64)];
u32 words32[AEGIS_BLOCK_SIZE / sizeof(u32)];
u8 bytes[AEGIS_BLOCK_SIZE];
};
#define AEGIS_BLOCK_ALIGN (__alignof__(union aegis_block))
#define AEGIS_ALIGNED(p) IS_ALIGNED((uintptr_t)p, AEGIS_BLOCK_ALIGN)
static const union aegis_block crypto_aegis_const[2] = {
{ .words64 = {
cpu_to_le64(U64_C(0x0d08050302010100)),
cpu_to_le64(U64_C(0x6279e99059372215)),
} },
{ .words64 = {
cpu_to_le64(U64_C(0xf12fc26d55183ddb)),
cpu_to_le64(U64_C(0xdd28b57342311120)),
} },
};
static void crypto_aegis_block_xor(union aegis_block *dst,
const union aegis_block *src)
{
dst->words64[0] ^= src->words64[0];
dst->words64[1] ^= src->words64[1];
}
static void crypto_aegis_block_and(union aegis_block *dst,
const union aegis_block *src)
{
dst->words64[0] &= src->words64[0];
dst->words64[1] &= src->words64[1];
}
static void crypto_aegis_aesenc(union aegis_block *dst,
const union aegis_block *src,
const union aegis_block *key)
{
u32 *d = dst->words32;
const u8 *s = src->bytes;
const u32 *k = key->words32;
const u32 *t0 = crypto_ft_tab[0];
const u32 *t1 = crypto_ft_tab[1];
const u32 *t2 = crypto_ft_tab[2];
const u32 *t3 = crypto_ft_tab[3];
u32 d0, d1, d2, d3;
d0 = t0[s[ 0]] ^ t1[s[ 5]] ^ t2[s[10]] ^ t3[s[15]] ^ k[0];
d1 = t0[s[ 4]] ^ t1[s[ 9]] ^ t2[s[14]] ^ t3[s[ 3]] ^ k[1];
d2 = t0[s[ 8]] ^ t1[s[13]] ^ t2[s[ 2]] ^ t3[s[ 7]] ^ k[2];
d3 = t0[s[12]] ^ t1[s[ 1]] ^ t2[s[ 6]] ^ t3[s[11]] ^ k[3];
d[0] = d0;
d[1] = d1;
d[2] = d2;
d[3] = d3;
}
#endif /* _CRYPTO_AEGIS_H */
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