--- /dev/null
+/*
+ * 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)
+#pragma GCC push_options
+#pragma GCC target("aes")
+#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 */
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