/* 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)]; __le32 words32[AEGIS_BLOCK_SIZE / sizeof(__le32)]; 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) { const u8 *s = src->bytes; 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]]; d1 = t0[s[ 4]] ^ t1[s[ 9]] ^ t2[s[14]] ^ t3[s[ 3]]; d2 = t0[s[ 8]] ^ t1[s[13]] ^ t2[s[ 2]] ^ t3[s[ 7]]; d3 = t0[s[12]] ^ t1[s[ 1]] ^ t2[s[ 6]] ^ t3[s[11]]; dst->words32[0] = cpu_to_le32(d0) ^ key->words32[0]; dst->words32[1] = cpu_to_le32(d1) ^ key->words32[1]; dst->words32[2] = cpu_to_le32(d2) ^ key->words32[2]; dst->words32[3] = cpu_to_le32(d3) ^ key->words32[3]; } #endif /* _CRYPTO_AEGIS_H */