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/bitops.h> 14 #include <linux/types.h> 15 16 #define AEGIS_BLOCK_SIZE 16 17 18 union aegis_block { 19 __le64 words64[AEGIS_BLOCK_SIZE / sizeof(__le64)]; 20 __le32 words32[AEGIS_BLOCK_SIZE / sizeof(__le32)]; 21 u8 bytes[AEGIS_BLOCK_SIZE]; 22 }; 23 24 #define AEGIS_BLOCK_ALIGN (__alignof__(union aegis_block)) 25 #define AEGIS_ALIGNED(p) IS_ALIGNED((uintptr_t)p, AEGIS_BLOCK_ALIGN) 26 27 static __always_inline void crypto_aegis_block_xor(union aegis_block *dst, 28 const union aegis_block *src) 29 { 30 dst->words64[0] ^= src->words64[0]; 31 dst->words64[1] ^= src->words64[1]; 32 } 33 34 static __always_inline void crypto_aegis_block_and(union aegis_block *dst, 35 const union aegis_block *src) 36 { 37 dst->words64[0] &= src->words64[0]; 38 dst->words64[1] &= src->words64[1]; 39 } 40 41 static __always_inline void crypto_aegis_aesenc(union aegis_block *dst, 42 const union aegis_block *src, 43 const union aegis_block *key) 44 { 45 const u8 *s = src->bytes; 46 const u32 *t = crypto_ft_tab[0]; 47 u32 d0, d1, d2, d3; 48 49 d0 = t[s[ 0]] ^ rol32(t[s[ 5]], 8) ^ rol32(t[s[10]], 16) ^ rol32(t[s[15]], 24); 50 d1 = t[s[ 4]] ^ rol32(t[s[ 9]], 8) ^ rol32(t[s[14]], 16) ^ rol32(t[s[ 3]], 24); 51 d2 = t[s[ 8]] ^ rol32(t[s[13]], 8) ^ rol32(t[s[ 2]], 16) ^ rol32(t[s[ 7]], 24); 52 d3 = t[s[12]] ^ rol32(t[s[ 1]], 8) ^ rol32(t[s[ 6]], 16) ^ rol32(t[s[11]], 24); 53 54 dst->words32[0] = cpu_to_le32(d0) ^ key->words32[0]; 55 dst->words32[1] = cpu_to_le32(d1) ^ key->words32[1]; 56 dst->words32[2] = cpu_to_le32(d2) ^ key->words32[2]; 57 dst->words32[3] = cpu_to_le32(d3) ^ key->words32[3]; 58 } 59 60 #endif /* _CRYPTO_AEGIS_H */ 61