cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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aegis.h (2559B)

      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
     18union 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
     24struct aegis_state;
     25
     26extern 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
     31bool crypto_aegis128_have_simd(void);
     32void crypto_aegis128_update_simd(struct aegis_state *state, const void *msg);
     33void crypto_aegis128_init_simd(struct aegis_state *state,
     34			       const union aegis_block *key,
     35			       const u8 *iv);
     36void crypto_aegis128_encrypt_chunk_simd(struct aegis_state *state, u8 *dst,
     37					const u8 *src, unsigned int size);
     38void crypto_aegis128_decrypt_chunk_simd(struct aegis_state *state, u8 *dst,
     39					const u8 *src, unsigned int size);
     40int 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
     46static __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
     53static __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
     60static __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 */