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Diffstat (limited to 'contrib/libottery/aes_cryptobox.c')
| -rw-r--r-- | contrib/libottery/aes_cryptobox.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/contrib/libottery/aes_cryptobox.c b/contrib/libottery/aes_cryptobox.c new file mode 100644 index 0000000..ea86dc7 --- /dev/null +++ b/contrib/libottery/aes_cryptobox.c @@ -0,0 +1,181 @@ +/* + * Copyright (c) 2017, Vsevolod Stakhov + * Copyright (c) 2017, Frank Denis + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY AUTHOR ''AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL AUTHOR BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "config.h" +#include "ottery-internal.h" +#include "cryptobox.h" + +#if defined(__x86_64__) && defined(RSPAMD_HAS_TARGET_ATTR) +#if defined(__GNUC__) && !defined(__clang__) +#pragma GCC push_options +#pragma GCC target("aes") +#endif +#ifndef __SSE2__ +#define __SSE2__ +#endif +#ifndef __SSE__ +#define __SSE__ +#endif +#ifndef __AES__ +#define __AES__ +#endif +#include <immintrin.h> +#define ROUNDS 10 + +typedef struct RSPAMD_ALIGNED(16) aes_rng_state { + __m128i round_keys[ROUNDS + 1]; + __m128i counter; +} aes_stream_state; + + +#define STATE_LEN sizeof(aes_stream_state) +#define STATE_BYTES 16 + +#define OUTPUT_LEN 1024 + +static void +aes_key_expand (__m128i round_keys[ROUNDS + 1], __m128i t) __attribute__((target("aes"))); + +static void +aes_key_expand (__m128i round_keys[ROUNDS + 1], __m128i t) +{ + __m128i t1; + +#define DO_ROUND_KEY(ROUND, RC) \ + do { \ + t1 = _mm_aeskeygenassist_si128(t, (RC)); \ + round_keys[ROUND] = t; \ + t = _mm_xor_si128(t, _mm_slli_si128(t, 4)); \ + t = _mm_xor_si128(t, _mm_slli_si128(t, 8)); \ + t = _mm_xor_si128(t, _mm_shuffle_epi32(t1, 0xff)); \ + } while (0) + + DO_ROUND_KEY(0, 1); + DO_ROUND_KEY(1, 2); + DO_ROUND_KEY(2, 4); + DO_ROUND_KEY(3, 8); + DO_ROUND_KEY(4, 16); + DO_ROUND_KEY(5, 32); + DO_ROUND_KEY(6, 64); + DO_ROUND_KEY(7, 128); + DO_ROUND_KEY(8, 27); + DO_ROUND_KEY(9, 54); + round_keys[10] = t; +} + +/* + * Computes one 128 bytes block and refresh keys + */ +static void +aes_round(unsigned char *buf, struct aes_rng_state *st) __attribute__((target("aes"))); +static void +aes_round(unsigned char *buf, struct aes_rng_state *st) +{ + const __m128i one = _mm_set_epi64x(0, 1); + __m128i *round_keys = st->round_keys; + __m128i c0, c1, c2, c3, c4, c5, c6, c7; + __m128i r0, r1, r2, r3, r4, r5, r6, r7; + __m128i s0, s1, s2, s3, s4, s5, s6, s7; + size_t i; + +#define COMPUTE_ROUNDS(N) \ + do { \ + r##N = _mm_aesenc_si128( _mm_xor_si128(c##N, round_keys[0]), round_keys[1]); \ + r##N = _mm_aesenc_si128(_mm_aesenc_si128(r##N, round_keys[2]), round_keys[3]); \ + r##N = _mm_aesenc_si128(_mm_aesenc_si128(r##N, round_keys[4]), round_keys[5]); \ + s##N = r##N; \ + r##N = _mm_aesenc_si128(_mm_aesenc_si128(r##N, round_keys[6]), round_keys[7]); \ + r##N = _mm_aesenc_si128(_mm_aesenc_si128(r##N, round_keys[8]), round_keys[9]); \ + r##N = _mm_xor_si128(s##N, _mm_aesenclast_si128(r##N, round_keys[10])); \ + } while (0) + + c0 = st->counter; + + for (i = 0; i < OUTPUT_LEN / 128; i ++) { + c1 = _mm_add_epi64 (c0, one); + c2 = _mm_add_epi64 (c1, one); + c3 = _mm_add_epi64 (c2, one); + c4 = _mm_add_epi64 (c3, one); + c5 = _mm_add_epi64 (c4, one); + c6 = _mm_add_epi64 (c5, one); + c7 = _mm_add_epi64 (c6, one); + COMPUTE_ROUNDS(0); + COMPUTE_ROUNDS(1); + COMPUTE_ROUNDS(2); + COMPUTE_ROUNDS(3); + COMPUTE_ROUNDS(4); + COMPUTE_ROUNDS(5); + COMPUTE_ROUNDS(6); + COMPUTE_ROUNDS(7); + c0 = _mm_add_epi64 (c7, one); + _mm_storeu_si128 ((__m128i *) (void *) (buf + 0), r0); + _mm_storeu_si128 ((__m128i *) (void *) (buf + 16), r1); + _mm_storeu_si128 ((__m128i *) (void *) (buf + 32), r2); + _mm_storeu_si128 ((__m128i *) (void *) (buf + 48), r3); + _mm_storeu_si128 ((__m128i *) (void *) (buf + 64), r4); + _mm_storeu_si128 ((__m128i *) (void *) (buf + 80), r5); + _mm_storeu_si128 ((__m128i *) (void *) (buf + 96), r6); + _mm_storeu_si128 ((__m128i *) (void *) (buf + 112), r7); + buf += 128; + } + + st->counter = c0; + c0 = _mm_setzero_si128(); + COMPUTE_ROUNDS(0); + aes_key_expand(round_keys, r0); +} + + +static void +aes_cryptobox_state_setup (void *state_, const uint8_t *bytes) +{ + struct aes_rng_state *x = state_; + + aes_key_expand (x->round_keys, + _mm_loadu_si128((const __m128i *) (const void *)bytes)); +} + +static void +aes_cryptobox_generate (void *state_, uint8_t *output, uint32_t idx) +{ + struct aes_rng_state *x = state_; + + aes_round(output, x); +} + +#define PRF_AES(r) { \ + "AES-" #r, \ + "AES-" #r "-NOSIMD", \ + "AES-" #r "-NOSIMD-DEFAULT", \ + STATE_LEN, \ + STATE_BYTES, \ + OUTPUT_LEN, \ + OTTERY_CPUCAP_AES, \ + aes_cryptobox_state_setup, \ + aes_cryptobox_generate \ +} + +const struct ottery_prf ottery_prf_aes_cryptobox_ = PRF_AES(128); +#endif /* x86_64 */ |