From f606a88e58230c30f5d56a53eff8da6fdbf1e4ee Mon Sep 17 00:00:00 2001 From: Ondrej Mosnacek Date: Fri, 11 May 2018 14:12:49 +0200 Subject: 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.pdf Signed-off-by: Ondrej Mosnacek Signed-off-by: Herbert Xu --- crypto/aegis.h | 80 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 crypto/aegis.h (limited to 'crypto/aegis.h') diff --git a/crypto/aegis.h b/crypto/aegis.h new file mode 100644 index 000000000000..f1c6900ddb80 --- /dev/null +++ b/crypto/aegis.h @@ -0,0 +1,80 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * AEGIS common definitions + * + * Copyright (c) 2018 Ondrej Mosnacek + * 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 +#include + +#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 */ -- cgit v1.2.3