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/*
* Copyright (c) 2017 Thomas Pornin <pornin@bolet.org>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#define BR_ENABLE_INTRINSICS 1
#include "inner.h"
#if BR_AES_X86NI
/* see bearssl_block.h */
const br_block_cbcenc_class *
br_aes_x86ni_cbcenc_get_vtable(void)
{
return br_aes_x86ni_supported() ? &br_aes_x86ni_cbcenc_vtable : NULL;
}
/* see bearssl_block.h */
void
br_aes_x86ni_cbcenc_init(br_aes_x86ni_cbcenc_keys *ctx,
const void *key, size_t len)
{
ctx->vtable = &br_aes_x86ni_cbcenc_vtable;
ctx->num_rounds = br_aes_x86ni_keysched_enc(ctx->skey.skni, key, len);
}
BR_TARGETS_X86_UP
/* see bearssl_block.h */
BR_TARGET("sse2,aes")
void
br_aes_x86ni_cbcenc_run(const br_aes_x86ni_cbcenc_keys *ctx,
void *iv, void *data, size_t len)
{
unsigned char *buf;
unsigned num_rounds;
__m128i sk[15], ivx;
unsigned u;
buf = data;
ivx = _mm_loadu_si128(iv);
num_rounds = ctx->num_rounds;
for (u = 0; u <= num_rounds; u ++) {
sk[u] = _mm_loadu_si128((void *)(ctx->skey.skni + (u << 4)));
}
while (len > 0) {
__m128i x;
x = _mm_xor_si128(_mm_loadu_si128((void *)buf), ivx);
x = _mm_xor_si128(x, sk[0]);
x = _mm_aesenc_si128(x, sk[1]);
x = _mm_aesenc_si128(x, sk[2]);
x = _mm_aesenc_si128(x, sk[3]);
x = _mm_aesenc_si128(x, sk[4]);
x = _mm_aesenc_si128(x, sk[5]);
x = _mm_aesenc_si128(x, sk[6]);
x = _mm_aesenc_si128(x, sk[7]);
x = _mm_aesenc_si128(x, sk[8]);
x = _mm_aesenc_si128(x, sk[9]);
if (num_rounds == 10) {
x = _mm_aesenclast_si128(x, sk[10]);
} else if (num_rounds == 12) {
x = _mm_aesenc_si128(x, sk[10]);
x = _mm_aesenc_si128(x, sk[11]);
x = _mm_aesenclast_si128(x, sk[12]);
} else {
x = _mm_aesenc_si128(x, sk[10]);
x = _mm_aesenc_si128(x, sk[11]);
x = _mm_aesenc_si128(x, sk[12]);
x = _mm_aesenc_si128(x, sk[13]);
x = _mm_aesenclast_si128(x, sk[14]);
}
ivx = x;
_mm_storeu_si128((void *)buf, x);
buf += 16;
len -= 16;
}
_mm_storeu_si128(iv, ivx);
}
BR_TARGETS_X86_DOWN
/* see bearssl_block.h */
const br_block_cbcenc_class br_aes_x86ni_cbcenc_vtable = {
sizeof(br_aes_x86ni_cbcenc_keys),
16,
4,
(void (*)(const br_block_cbcenc_class **, const void *, size_t))
&br_aes_x86ni_cbcenc_init,
(void (*)(const br_block_cbcenc_class *const *, void *, void *, size_t))
&br_aes_x86ni_cbcenc_run
};
#else
/* see bearssl_block.h */
const br_block_cbcenc_class *
br_aes_x86ni_cbcenc_get_vtable(void)
{
return NULL;
}
#endif
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