| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 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 | __le32 words32[AEGIS_BLOCK_SIZE / sizeof(__le32)]; |
| 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 | const u8 *s = src->bytes; |
| 61 | const u32 *t0 = crypto_ft_tab[0]; |
| 62 | const u32 *t1 = crypto_ft_tab[1]; |
| 63 | const u32 *t2 = crypto_ft_tab[2]; |
| 64 | const u32 *t3 = crypto_ft_tab[3]; |
| 65 | u32 d0, d1, d2, d3; |
| 66 | |
| 67 | d0 = t0[s[ 0]] ^ t1[s[ 5]] ^ t2[s[10]] ^ t3[s[15]]; |
| 68 | d1 = t0[s[ 4]] ^ t1[s[ 9]] ^ t2[s[14]] ^ t3[s[ 3]]; |
| 69 | d2 = t0[s[ 8]] ^ t1[s[13]] ^ t2[s[ 2]] ^ t3[s[ 7]]; |
| 70 | d3 = t0[s[12]] ^ t1[s[ 1]] ^ t2[s[ 6]] ^ t3[s[11]]; |
| 71 | |
| 72 | dst->words32[0] = cpu_to_le32(d0) ^ key->words32[0]; |
| 73 | dst->words32[1] = cpu_to_le32(d1) ^ key->words32[1]; |
| 74 | dst->words32[2] = cpu_to_le32(d2) ^ key->words32[2]; |
| 75 | dst->words32[3] = cpu_to_le32(d3) ^ key->words32[3]; |
| 76 | } |
| 77 | |
| 78 | #endif /* _CRYPTO_AEGIS_H */ |