81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* AEGIS common definitions
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*
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* Copyright (c) 2018 Ondrej Mosnacek <omosnacek@gmail.com>
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* Copyright (c) 2018 Red Hat, Inc. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*/
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#ifndef _CRYPTO_AEGIS_H
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#define _CRYPTO_AEGIS_H
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#include <crypto/aes.h>
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#include <linux/types.h>
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#define AEGIS_BLOCK_SIZE 16
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union aegis_block {
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__le64 words64[AEGIS_BLOCK_SIZE / sizeof(__le64)];
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u32 words32[AEGIS_BLOCK_SIZE / sizeof(u32)];
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u8 bytes[AEGIS_BLOCK_SIZE];
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};
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#define AEGIS_BLOCK_ALIGN (__alignof__(union aegis_block))
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#define AEGIS_ALIGNED(p) IS_ALIGNED((uintptr_t)p, AEGIS_BLOCK_ALIGN)
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static const union aegis_block crypto_aegis_const[2] = {
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{ .words64 = {
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cpu_to_le64(U64_C(0x0d08050302010100)),
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cpu_to_le64(U64_C(0x6279e99059372215)),
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} },
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{ .words64 = {
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cpu_to_le64(U64_C(0xf12fc26d55183ddb)),
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cpu_to_le64(U64_C(0xdd28b57342311120)),
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} },
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};
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static void crypto_aegis_block_xor(union aegis_block *dst,
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const union aegis_block *src)
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{
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dst->words64[0] ^= src->words64[0];
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dst->words64[1] ^= src->words64[1];
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}
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static void crypto_aegis_block_and(union aegis_block *dst,
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const union aegis_block *src)
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{
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dst->words64[0] &= src->words64[0];
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dst->words64[1] &= src->words64[1];
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}
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static void crypto_aegis_aesenc(union aegis_block *dst,
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const union aegis_block *src,
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const union aegis_block *key)
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{
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u32 *d = dst->words32;
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const u8 *s = src->bytes;
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const u32 *k = key->words32;
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const u32 *t0 = crypto_ft_tab[0];
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const u32 *t1 = crypto_ft_tab[1];
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const u32 *t2 = crypto_ft_tab[2];
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const u32 *t3 = crypto_ft_tab[3];
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u32 d0, d1, d2, d3;
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d0 = t0[s[ 0]] ^ t1[s[ 5]] ^ t2[s[10]] ^ t3[s[15]] ^ k[0];
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d1 = t0[s[ 4]] ^ t1[s[ 9]] ^ t2[s[14]] ^ t3[s[ 3]] ^ k[1];
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d2 = t0[s[ 8]] ^ t1[s[13]] ^ t2[s[ 2]] ^ t3[s[ 7]] ^ k[2];
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d3 = t0[s[12]] ^ t1[s[ 1]] ^ t2[s[ 6]] ^ t3[s[11]] ^ k[3];
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d[0] = d0;
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d[1] = d1;
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d[2] = d2;
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d[3] = d3;
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}
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#endif /* _CRYPTO_AEGIS_H */
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