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180 lines
5.9 KiB
C
180 lines
5.9 KiB
C
/*
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* Copyright (c) 2017, Vsevolod Stakhov
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* Copyright (c) 2017, Frank Denis
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY AUTHOR ''AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "ottery-internal.h"
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#include "cryptobox.h"
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#if defined(__x86_64__) && defined(RSPAMD_HAS_TARGET_ATTR)
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#pragma GCC push_options
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#pragma GCC target("aes")
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#ifndef __SSE2__
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#define __SSE2__
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#endif
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#ifndef __SSE__
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#define __SSE__
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#endif
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#ifndef __AES__
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#define __AES__
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#endif
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#include <immintrin.h>
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#define ROUNDS 10
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typedef struct RSPAMD_ALIGNED(16) aes_rng_state {
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__m128i round_keys[ROUNDS + 1];
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__m128i counter;
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} aes_stream_state;
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#define STATE_LEN sizeof(aes_stream_state)
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#define STATE_BYTES 16
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#define OUTPUT_LEN 1024
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static void
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aes_key_expand (__m128i round_keys[ROUNDS + 1], __m128i t) __attribute__((target("aes")));
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static void
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aes_key_expand (__m128i round_keys[ROUNDS + 1], __m128i t)
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{
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__m128i t1;
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#define DO_ROUND_KEY(ROUND, RC) \
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do { \
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t1 = _mm_aeskeygenassist_si128(t, (RC)); \
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round_keys[ROUND] = t; \
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t = _mm_xor_si128(t, _mm_slli_si128(t, 4)); \
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t = _mm_xor_si128(t, _mm_slli_si128(t, 8)); \
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t = _mm_xor_si128(t, _mm_shuffle_epi32(t1, 0xff)); \
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} while (0)
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DO_ROUND_KEY(0, 1);
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DO_ROUND_KEY(1, 2);
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DO_ROUND_KEY(2, 4);
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DO_ROUND_KEY(3, 8);
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DO_ROUND_KEY(4, 16);
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DO_ROUND_KEY(5, 32);
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DO_ROUND_KEY(6, 64);
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DO_ROUND_KEY(7, 128);
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DO_ROUND_KEY(8, 27);
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DO_ROUND_KEY(9, 54);
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round_keys[10] = t;
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}
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/*
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* Computes one 128 bytes block and refresh keys
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*/
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static void
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aes_round(unsigned char *buf, struct aes_rng_state *st) __attribute__((target("aes")));
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static void
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aes_round(unsigned char *buf, struct aes_rng_state *st)
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{
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const __m128i one = _mm_set_epi64x(0, 1);
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__m128i *round_keys = st->round_keys;
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__m128i c0, c1, c2, c3, c4, c5, c6, c7;
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__m128i r0, r1, r2, r3, r4, r5, r6, r7;
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__m128i s0, s1, s2, s3, s4, s5, s6, s7;
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size_t i;
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#define COMPUTE_ROUNDS(N) \
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do { \
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r##N = _mm_aesenc_si128( _mm_xor_si128(c##N, round_keys[0]), round_keys[1]); \
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r##N = _mm_aesenc_si128(_mm_aesenc_si128(r##N, round_keys[2]), round_keys[3]); \
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r##N = _mm_aesenc_si128(_mm_aesenc_si128(r##N, round_keys[4]), round_keys[5]); \
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s##N = r##N; \
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r##N = _mm_aesenc_si128(_mm_aesenc_si128(r##N, round_keys[6]), round_keys[7]); \
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r##N = _mm_aesenc_si128(_mm_aesenc_si128(r##N, round_keys[8]), round_keys[9]); \
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r##N = _mm_xor_si128(s##N, _mm_aesenclast_si128(r##N, round_keys[10])); \
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} while (0)
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c0 = st->counter;
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for (i = 0; i < OUTPUT_LEN / 128; i ++) {
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c1 = _mm_add_epi64 (c0, one);
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c2 = _mm_add_epi64 (c1, one);
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c3 = _mm_add_epi64 (c2, one);
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c4 = _mm_add_epi64 (c3, one);
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c5 = _mm_add_epi64 (c4, one);
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c6 = _mm_add_epi64 (c5, one);
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c7 = _mm_add_epi64 (c6, one);
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COMPUTE_ROUNDS(0);
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COMPUTE_ROUNDS(1);
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COMPUTE_ROUNDS(2);
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COMPUTE_ROUNDS(3);
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COMPUTE_ROUNDS(4);
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COMPUTE_ROUNDS(5);
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COMPUTE_ROUNDS(6);
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COMPUTE_ROUNDS(7);
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c0 = _mm_add_epi64 (c7, one);
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_mm_storeu_si128 ((__m128i *) (void *) (buf + 0), r0);
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_mm_storeu_si128 ((__m128i *) (void *) (buf + 16), r1);
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_mm_storeu_si128 ((__m128i *) (void *) (buf + 32), r2);
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_mm_storeu_si128 ((__m128i *) (void *) (buf + 48), r3);
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_mm_storeu_si128 ((__m128i *) (void *) (buf + 64), r4);
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_mm_storeu_si128 ((__m128i *) (void *) (buf + 80), r5);
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_mm_storeu_si128 ((__m128i *) (void *) (buf + 96), r6);
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_mm_storeu_si128 ((__m128i *) (void *) (buf + 112), r7);
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buf += 128;
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}
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st->counter = c0;
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c0 = _mm_setzero_si128();
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COMPUTE_ROUNDS(0);
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aes_key_expand(round_keys, r0);
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}
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static void
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aes_cryptobox_state_setup (void *state_, const uint8_t *bytes)
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{
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struct aes_rng_state *x = state_;
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aes_key_expand (x->round_keys,
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_mm_loadu_si128((const __m128i *) (const void *)bytes));
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}
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static void
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aes_cryptobox_generate (void *state_, uint8_t *output, uint32_t idx)
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{
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struct aes_rng_state *x = state_;
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aes_round(output, x);
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}
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#define PRF_AES(r) { \
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"AES-" #r, \
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"AES-" #r "-NOSIMD", \
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"AES-" #r "-NOSIMD-DEFAULT", \
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STATE_LEN, \
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STATE_BYTES, \
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OUTPUT_LEN, \
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OTTERY_CPUCAP_AES, \
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aes_cryptobox_state_setup, \
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aes_cryptobox_generate \
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}
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const struct ottery_prf ottery_prf_aes_cryptobox_ = PRF_AES(128);
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#endif /* x86_64 */
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