1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * AEGIS common definitions 4 * 5 * Copyright (c) 2018 Ondrej Mosnacek <omosnacek@gmail.com> 6 * Copyright (c) 2018 Red Hat, Inc. All rights reserved. 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the Free 10 * Software Foundation; either version 2 of the License, or (at your option) 11 * any later version. 12 */ 13 14 #ifndef _CRYPTO_AEGIS_H 15 #define _CRYPTO_AEGIS_H 16 17 #include <crypto/aes.h> 18 #include <linux/types.h> 19 20 #define AEGIS_BLOCK_SIZE 16 21 22 union aegis_block { 23 __le64 words64[AEGIS_BLOCK_SIZE / sizeof(__le64)]; 24 u32 words32[AEGIS_BLOCK_SIZE / sizeof(u32)]; 25 u8 bytes[AEGIS_BLOCK_SIZE]; 26 }; 27 28 #define AEGIS_BLOCK_ALIGN (__alignof__(union aegis_block)) 29 #define AEGIS_ALIGNED(p) IS_ALIGNED((uintptr_t)p, AEGIS_BLOCK_ALIGN) 30 31 static const union aegis_block crypto_aegis_const[2] = { 32 { .words64 = { 33 cpu_to_le64(U64_C(0x0d08050302010100)), 34 cpu_to_le64(U64_C(0x6279e99059372215)), 35 } }, 36 { .words64 = { 37 cpu_to_le64(U64_C(0xf12fc26d55183ddb)), 38 cpu_to_le64(U64_C(0xdd28b57342311120)), 39 } }, 40 }; 41 42 static void crypto_aegis_block_xor(union aegis_block *dst, 43 const union aegis_block *src) 44 { 45 dst->words64[0] ^= src->words64[0]; 46 dst->words64[1] ^= src->words64[1]; 47 } 48 49 static void crypto_aegis_block_and(union aegis_block *dst, 50 const union aegis_block *src) 51 { 52 dst->words64[0] &= src->words64[0]; 53 dst->words64[1] &= src->words64[1]; 54 } 55 56 static void crypto_aegis_aesenc(union aegis_block *dst, 57 const union aegis_block *src, 58 const union aegis_block *key) 59 { 60 u32 *d = dst->words32; 61 const u8 *s = src->bytes; 62 const u32 *k = key->words32; 63 const u32 *t0 = crypto_ft_tab[0]; 64 const u32 *t1 = crypto_ft_tab[1]; 65 const u32 *t2 = crypto_ft_tab[2]; 66 const u32 *t3 = crypto_ft_tab[3]; 67 u32 d0, d1, d2, d3; 68 69 d0 = t0[s[ 0]] ^ t1[s[ 5]] ^ t2[s[10]] ^ t3[s[15]] ^ k[0]; 70 d1 = t0[s[ 4]] ^ t1[s[ 9]] ^ t2[s[14]] ^ t3[s[ 3]] ^ k[1]; 71 d2 = t0[s[ 8]] ^ t1[s[13]] ^ t2[s[ 2]] ^ t3[s[ 7]] ^ k[2]; 72 d3 = t0[s[12]] ^ t1[s[ 1]] ^ t2[s[ 6]] ^ t3[s[11]] ^ k[3]; 73 74 d[0] = d0; 75 d[1] = d1; 76 d[2] = d2; 77 d[3] = d3; 78 } 79 80 #endif /* _CRYPTO_AEGIS_H */ 81