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 struct aegis_state; 25 26 extern int aegis128_have_aes_insn; 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 bool crypto_aegis128_have_simd(void); 32 void crypto_aegis128_update_simd(struct aegis_state *state, const void *msg); 33 void crypto_aegis128_init_simd(struct aegis_state *state, 34 const union aegis_block *key, 35 const u8 *iv); 36 void crypto_aegis128_encrypt_chunk_simd(struct aegis_state *state, u8 *dst, 37 const u8 *src, unsigned int size); 38 void crypto_aegis128_decrypt_chunk_simd(struct aegis_state *state, u8 *dst, 39 const u8 *src, unsigned int size); 40 int crypto_aegis128_final_simd(struct aegis_state *state, 41 union aegis_block *tag_xor, 42 unsigned int assoclen, 43 unsigned int cryptlen, 44 unsigned int authsize); 45 46 static __always_inline void crypto_aegis_block_xor(union aegis_block *dst, 47 const union aegis_block *src) 48 { 49 dst->words64[0] ^= src->words64[0]; 50 dst->words64[1] ^= src->words64[1]; 51 } 52 53 static __always_inline void crypto_aegis_block_and(union aegis_block *dst, 54 const union aegis_block *src) 55 { 56 dst->words64[0] &= src->words64[0]; 57 dst->words64[1] &= src->words64[1]; 58 } 59 60 static __always_inline void crypto_aegis_aesenc(union aegis_block *dst, 61 const union aegis_block *src, 62 const union aegis_block *key) 63 { 64 const u8 *s = src->bytes; 65 const u32 *t = crypto_ft_tab[0]; 66 u32 d0, d1, d2, d3; 67 68 d0 = t[s[ 0]] ^ rol32(t[s[ 5]], 8) ^ rol32(t[s[10]], 16) ^ rol32(t[s[15]], 24); 69 d1 = t[s[ 4]] ^ rol32(t[s[ 9]], 8) ^ rol32(t[s[14]], 16) ^ rol32(t[s[ 3]], 24); 70 d2 = t[s[ 8]] ^ rol32(t[s[13]], 8) ^ rol32(t[s[ 2]], 16) ^ rol32(t[s[ 7]], 24); 71 d3 = t[s[12]] ^ rol32(t[s[ 1]], 8) ^ rol32(t[s[ 6]], 16) ^ rol32(t[s[11]], 24); 72 73 dst->words32[0] = cpu_to_le32(d0) ^ key->words32[0]; 74 dst->words32[1] = cpu_to_le32(d1) ^ key->words32[1]; 75 dst->words32[2] = cpu_to_le32(d2) ^ key->words32[2]; 76 dst->words32[3] = cpu_to_le32(d3) ^ key->words32[3]; 77 } 78 79 #endif /* _CRYPTO_AEGIS_H */ 80