1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 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 9 #ifndef _CRYPTO_AEGIS_H 10 #define _CRYPTO_AEGIS_H 11 12 #include <crypto/aes.h> 13 #include <linux/types.h> 14 15 #define AEGIS_BLOCK_SIZE 16 16 17 union aegis_block { 18 __le64 words64[AEGIS_BLOCK_SIZE / sizeof(__le64)]; 19 __le32 words32[AEGIS_BLOCK_SIZE / sizeof(__le32)]; 20 u8 bytes[AEGIS_BLOCK_SIZE]; 21 }; 22 23 #define AEGIS_BLOCK_ALIGN (__alignof__(union aegis_block)) 24 #define AEGIS_ALIGNED(p) IS_ALIGNED((uintptr_t)p, AEGIS_BLOCK_ALIGN) 25 26 static const union aegis_block crypto_aegis_const[2] = { 27 { .words64 = { 28 cpu_to_le64(U64_C(0x0d08050302010100)), 29 cpu_to_le64(U64_C(0x6279e99059372215)), 30 } }, 31 { .words64 = { 32 cpu_to_le64(U64_C(0xf12fc26d55183ddb)), 33 cpu_to_le64(U64_C(0xdd28b57342311120)), 34 } }, 35 }; 36 37 static void crypto_aegis_block_xor(union aegis_block *dst, 38 const union aegis_block *src) 39 { 40 dst->words64[0] ^= src->words64[0]; 41 dst->words64[1] ^= src->words64[1]; 42 } 43 44 static void crypto_aegis_block_and(union aegis_block *dst, 45 const union aegis_block *src) 46 { 47 dst->words64[0] &= src->words64[0]; 48 dst->words64[1] &= src->words64[1]; 49 } 50 51 static void crypto_aegis_aesenc(union aegis_block *dst, 52 const union aegis_block *src, 53 const union aegis_block *key) 54 { 55 const u8 *s = src->bytes; 56 const u32 *t0 = crypto_ft_tab[0]; 57 const u32 *t1 = crypto_ft_tab[1]; 58 const u32 *t2 = crypto_ft_tab[2]; 59 const u32 *t3 = crypto_ft_tab[3]; 60 u32 d0, d1, d2, d3; 61 62 d0 = t0[s[ 0]] ^ t1[s[ 5]] ^ t2[s[10]] ^ t3[s[15]]; 63 d1 = t0[s[ 4]] ^ t1[s[ 9]] ^ t2[s[14]] ^ t3[s[ 3]]; 64 d2 = t0[s[ 8]] ^ t1[s[13]] ^ t2[s[ 2]] ^ t3[s[ 7]]; 65 d3 = t0[s[12]] ^ t1[s[ 1]] ^ t2[s[ 6]] ^ t3[s[11]]; 66 67 dst->words32[0] = cpu_to_le32(d0) ^ key->words32[0]; 68 dst->words32[1] = cpu_to_le32(d1) ^ key->words32[1]; 69 dst->words32[2] = cpu_to_le32(d2) ^ key->words32[2]; 70 dst->words32[3] = cpu_to_le32(d3) ^ key->words32[3]; 71 } 72 73 #endif /* _CRYPTO_AEGIS_H */ 74