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 const union aegis_block crypto_aegis_const[2] = { 28 { .words64 = { 29 cpu_to_le64(U64_C(0x0d08050302010100)), 30 cpu_to_le64(U64_C(0x6279e99059372215)), 31 } }, 32 { .words64 = { 33 cpu_to_le64(U64_C(0xf12fc26d55183ddb)), 34 cpu_to_le64(U64_C(0xdd28b57342311120)), 35 } }, 36 }; 37 38 static __always_inline void crypto_aegis_block_xor(union aegis_block *dst, 39 const union aegis_block *src) 40 { 41 dst->words64[0] ^= src->words64[0]; 42 dst->words64[1] ^= src->words64[1]; 43 } 44 45 static __always_inline void crypto_aegis_block_and(union aegis_block *dst, 46 const union aegis_block *src) 47 { 48 dst->words64[0] &= src->words64[0]; 49 dst->words64[1] &= src->words64[1]; 50 } 51 52 static __always_inline void crypto_aegis_aesenc(union aegis_block *dst, 53 const union aegis_block *src, 54 const union aegis_block *key) 55 { 56 const u8 *s = src->bytes; 57 const u32 *t = crypto_ft_tab[0]; 58 u32 d0, d1, d2, d3; 59 60 d0 = t[s[ 0]] ^ rol32(t[s[ 5]], 8) ^ rol32(t[s[10]], 16) ^ rol32(t[s[15]], 24); 61 d1 = t[s[ 4]] ^ rol32(t[s[ 9]], 8) ^ rol32(t[s[14]], 16) ^ rol32(t[s[ 3]], 24); 62 d2 = t[s[ 8]] ^ rol32(t[s[13]], 8) ^ rol32(t[s[ 2]], 16) ^ rol32(t[s[ 7]], 24); 63 d3 = t[s[12]] ^ rol32(t[s[ 1]], 8) ^ rol32(t[s[ 6]], 16) ^ rol32(t[s[11]], 24); 64 65 dst->words32[0] = cpu_to_le32(d0) ^ key->words32[0]; 66 dst->words32[1] = cpu_to_le32(d1) ^ key->words32[1]; 67 dst->words32[2] = cpu_to_le32(d2) ^ key->words32[2]; 68 dst->words32[3] = cpu_to_le32(d3) ^ key->words32[3]; 69 } 70 71 #endif /* _CRYPTO_AEGIS_H */ 72