diff options
Diffstat (limited to 'crypto/aegis128-neon-inner.c')
-rw-r--r-- | crypto/aegis128-neon-inner.c | 149 |
1 files changed, 0 insertions, 149 deletions
diff --git a/crypto/aegis128-neon-inner.c b/crypto/aegis128-neon-inner.c deleted file mode 100644 index 26e9450a5833..000000000000 --- a/crypto/aegis128-neon-inner.c +++ /dev/null @@ -1,149 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * Copyright (C) 2019 Linaro, Ltd. <ard.biesheuvel@linaro.org> - */ - -#ifdef CONFIG_ARM64 -#include <asm/neon-intrinsics.h> - -#define AES_ROUND "aese %0.16b, %1.16b \n\t aesmc %0.16b, %0.16b" -#else -#include <arm_neon.h> - -#define AES_ROUND "aese.8 %q0, %q1 \n\t aesmc.8 %q0, %q0" -#endif - -#define AEGIS_BLOCK_SIZE 16 - -#include <stddef.h> - -void *memcpy(void *dest, const void *src, size_t n); -void *memset(void *s, int c, size_t n); - -struct aegis128_state { - uint8x16_t v[5]; -}; - -static struct aegis128_state aegis128_load_state_neon(const void *state) -{ - return (struct aegis128_state){ { - vld1q_u8(state), - vld1q_u8(state + 16), - vld1q_u8(state + 32), - vld1q_u8(state + 48), - vld1q_u8(state + 64) - } }; -} - -static void aegis128_save_state_neon(struct aegis128_state st, void *state) -{ - vst1q_u8(state, st.v[0]); - vst1q_u8(state + 16, st.v[1]); - vst1q_u8(state + 32, st.v[2]); - vst1q_u8(state + 48, st.v[3]); - vst1q_u8(state + 64, st.v[4]); -} - -static uint8x16_t aegis_aes_round(uint8x16_t w) -{ - uint8x16_t z = {}; - - /* - * We use inline asm here instead of the vaeseq_u8/vaesmcq_u8 intrinsics - * to force the compiler to issue the aese/aesmc instructions in pairs. - * This is much faster on many cores, where the instruction pair can - * execute in a single cycle. - */ - asm(AES_ROUND : "+w"(w) : "w"(z)); - return w; -} - -static struct aegis128_state aegis128_update_neon(struct aegis128_state st, - uint8x16_t m) -{ - uint8x16_t t; - - t = aegis_aes_round(st.v[3]); - st.v[3] ^= aegis_aes_round(st.v[2]); - st.v[2] ^= aegis_aes_round(st.v[1]); - st.v[1] ^= aegis_aes_round(st.v[0]); - st.v[0] ^= aegis_aes_round(st.v[4]) ^ m; - st.v[4] ^= t; - - return st; -} - -void crypto_aegis128_update_neon(void *state, const void *msg) -{ - struct aegis128_state st = aegis128_load_state_neon(state); - - st = aegis128_update_neon(st, vld1q_u8(msg)); - - aegis128_save_state_neon(st, state); -} - -void crypto_aegis128_encrypt_chunk_neon(void *state, void *dst, const void *src, - unsigned int size) -{ - struct aegis128_state st = aegis128_load_state_neon(state); - uint8x16_t tmp; - - while (size >= AEGIS_BLOCK_SIZE) { - uint8x16_t s = vld1q_u8(src); - - tmp = s ^ st.v[1] ^ (st.v[2] & st.v[3]) ^ st.v[4]; - st = aegis128_update_neon(st, s); - vst1q_u8(dst, tmp); - - size -= AEGIS_BLOCK_SIZE; - src += AEGIS_BLOCK_SIZE; - dst += AEGIS_BLOCK_SIZE; - } - - if (size > 0) { - uint8_t buf[AEGIS_BLOCK_SIZE] = {}; - uint8x16_t msg; - - memcpy(buf, src, size); - msg = vld1q_u8(buf); - tmp = msg ^ st.v[1] ^ (st.v[2] & st.v[3]) ^ st.v[4]; - st = aegis128_update_neon(st, msg); - vst1q_u8(buf, tmp); - memcpy(dst, buf, size); - } - - aegis128_save_state_neon(st, state); -} - -void crypto_aegis128_decrypt_chunk_neon(void *state, void *dst, const void *src, - unsigned int size) -{ - struct aegis128_state st = aegis128_load_state_neon(state); - uint8x16_t tmp; - - while (size >= AEGIS_BLOCK_SIZE) { - tmp = vld1q_u8(src) ^ st.v[1] ^ (st.v[2] & st.v[3]) ^ st.v[4]; - st = aegis128_update_neon(st, tmp); - vst1q_u8(dst, tmp); - - size -= AEGIS_BLOCK_SIZE; - src += AEGIS_BLOCK_SIZE; - dst += AEGIS_BLOCK_SIZE; - } - - if (size > 0) { - uint8_t buf[AEGIS_BLOCK_SIZE] = {}; - uint8x16_t msg; - - memcpy(buf, src, size); - msg = vld1q_u8(buf) ^ st.v[1] ^ (st.v[2] & st.v[3]) ^ st.v[4]; - vst1q_u8(buf, msg); - memcpy(dst, buf, size); - - memset(buf + size, 0, AEGIS_BLOCK_SIZE - size); - msg = vld1q_u8(buf); - st = aegis128_update_neon(st, msg); - } - - aegis128_save_state_neon(st, state); -} |