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- /* SPDX-License-Identifier: GPL-2.0-or-later */
- /*
- * AEGIS common definitions
- *
- * Copyright (c) 2018 Ondrej Mosnacek <[email protected]>
- * Copyright (c) 2018 Red Hat, Inc. All rights reserved.
- */
- #ifndef _CRYPTO_AEGIS_H
- #define _CRYPTO_AEGIS_H
- #include <crypto/aes.h>
- #include <linux/bitops.h>
- #include <linux/types.h>
- #define AEGIS_BLOCK_SIZE 16
- union aegis_block {
- __le64 words64[AEGIS_BLOCK_SIZE / sizeof(__le64)];
- __le32 words32[AEGIS_BLOCK_SIZE / sizeof(__le32)];
- u8 bytes[AEGIS_BLOCK_SIZE];
- };
- struct aegis_state;
- extern int aegis128_have_aes_insn;
- #define AEGIS_BLOCK_ALIGN (__alignof__(union aegis_block))
- #define AEGIS_ALIGNED(p) IS_ALIGNED((uintptr_t)p, AEGIS_BLOCK_ALIGN)
- bool crypto_aegis128_have_simd(void);
- void crypto_aegis128_update_simd(struct aegis_state *state, const void *msg);
- void crypto_aegis128_init_simd(struct aegis_state *state,
- const union aegis_block *key,
- const u8 *iv);
- void crypto_aegis128_encrypt_chunk_simd(struct aegis_state *state, u8 *dst,
- const u8 *src, unsigned int size);
- void crypto_aegis128_decrypt_chunk_simd(struct aegis_state *state, u8 *dst,
- const u8 *src, unsigned int size);
- int crypto_aegis128_final_simd(struct aegis_state *state,
- union aegis_block *tag_xor,
- unsigned int assoclen,
- unsigned int cryptlen,
- unsigned int authsize);
- static __always_inline void crypto_aegis_block_xor(union aegis_block *dst,
- const union aegis_block *src)
- {
- dst->words64[0] ^= src->words64[0];
- dst->words64[1] ^= src->words64[1];
- }
- static __always_inline void crypto_aegis_block_and(union aegis_block *dst,
- const union aegis_block *src)
- {
- dst->words64[0] &= src->words64[0];
- dst->words64[1] &= src->words64[1];
- }
- static __always_inline void crypto_aegis_aesenc(union aegis_block *dst,
- const union aegis_block *src,
- const union aegis_block *key)
- {
- const u8 *s = src->bytes;
- const u32 *t = crypto_ft_tab[0];
- u32 d0, d1, d2, d3;
- d0 = t[s[ 0]] ^ rol32(t[s[ 5]], 8) ^ rol32(t[s[10]], 16) ^ rol32(t[s[15]], 24);
- d1 = t[s[ 4]] ^ rol32(t[s[ 9]], 8) ^ rol32(t[s[14]], 16) ^ rol32(t[s[ 3]], 24);
- d2 = t[s[ 8]] ^ rol32(t[s[13]], 8) ^ rol32(t[s[ 2]], 16) ^ rol32(t[s[ 7]], 24);
- d3 = t[s[12]] ^ rol32(t[s[ 1]], 8) ^ rol32(t[s[ 6]], 16) ^ rol32(t[s[11]], 24);
- dst->words32[0] = cpu_to_le32(d0) ^ key->words32[0];
- dst->words32[1] = cpu_to_le32(d1) ^ key->words32[1];
- dst->words32[2] = cpu_to_le32(d2) ^ key->words32[2];
- dst->words32[3] = cpu_to_le32(d3) ^ key->words32[3];
- }
- #endif /* _CRYPTO_AEGIS_H */
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