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/**
* \file
* \author Egor Tensin <Egor.Tensin@gmail.com>
* \date 2015
* \copyright This file is licensed under the terms of the MIT License.
* See LICENSE.txt for details.
*/
#include <aesni/all.h>
#include <emmintrin.h>
#include <wmmintrin.h>
AesNI_Block128 __fastcall aesni_aes256_encrypt_block_(
AesNI_Block128 plain,
const AesNI_Aes256_RoundKeys* key_schedule)
{
plain = _mm_xor_si128(plain, key_schedule->keys[0]);
plain = _mm_aesenc_si128(plain, key_schedule->keys[1]);
plain = _mm_aesenc_si128(plain, key_schedule->keys[2]);
plain = _mm_aesenc_si128(plain, key_schedule->keys[3]);
plain = _mm_aesenc_si128(plain, key_schedule->keys[4]);
plain = _mm_aesenc_si128(plain, key_schedule->keys[5]);
plain = _mm_aesenc_si128(plain, key_schedule->keys[6]);
plain = _mm_aesenc_si128(plain, key_schedule->keys[7]);
plain = _mm_aesenc_si128(plain, key_schedule->keys[8]);
plain = _mm_aesenc_si128(plain, key_schedule->keys[9]);
plain = _mm_aesenc_si128(plain, key_schedule->keys[10]);
plain = _mm_aesenc_si128(plain, key_schedule->keys[11]);
plain = _mm_aesenc_si128(plain, key_schedule->keys[12]);
plain = _mm_aesenc_si128(plain, key_schedule->keys[13]);
return _mm_aesenclast_si128(plain, key_schedule->keys[14]);
}
AesNI_Block128 __fastcall aesni_aes256_decrypt_block_(
AesNI_Block128 cipher,
const AesNI_Aes256_RoundKeys* inverted_schedule)
{
cipher = _mm_xor_si128(cipher, inverted_schedule->keys[0]);
cipher = _mm_aesdec_si128(cipher, inverted_schedule->keys[1]);
cipher = _mm_aesdec_si128(cipher, inverted_schedule->keys[2]);
cipher = _mm_aesdec_si128(cipher, inverted_schedule->keys[3]);
cipher = _mm_aesdec_si128(cipher, inverted_schedule->keys[4]);
cipher = _mm_aesdec_si128(cipher, inverted_schedule->keys[5]);
cipher = _mm_aesdec_si128(cipher, inverted_schedule->keys[6]);
cipher = _mm_aesdec_si128(cipher, inverted_schedule->keys[7]);
cipher = _mm_aesdec_si128(cipher, inverted_schedule->keys[8]);
cipher = _mm_aesdec_si128(cipher, inverted_schedule->keys[9]);
cipher = _mm_aesdec_si128(cipher, inverted_schedule->keys[10]);
cipher = _mm_aesdec_si128(cipher, inverted_schedule->keys[11]);
cipher = _mm_aesdec_si128(cipher, inverted_schedule->keys[12]);
cipher = _mm_aesdec_si128(cipher, inverted_schedule->keys[13]);
return _mm_aesdeclast_si128(cipher, inverted_schedule->keys[14]);
}
static AesNI_Block128 __fastcall aesni_aes256_expand_key_assist(
AesNI_Block128* prev_lo,
AesNI_Block128* prev_hi,
AesNI_Block128 hwgen)
{
AesNI_Block128 tmp = *prev_lo;
tmp = _mm_slli_si128(tmp, 4);
*prev_lo = _mm_xor_si128(*prev_lo, tmp);
tmp = _mm_slli_si128(tmp, 4);
*prev_lo = _mm_xor_si128(*prev_lo, tmp);
tmp = _mm_slli_si128(tmp, 4);
*prev_lo = _mm_xor_si128(*prev_lo, tmp);
*prev_lo = _mm_xor_si128(*prev_lo, hwgen);
*prev_hi = _mm_xor_si128(*prev_hi, *prev_lo);
*prev_lo = _mm_xor_si128(*prev_lo, *prev_hi);
*prev_hi = _mm_xor_si128(*prev_hi, *prev_lo);
return *prev_hi;
}
void __fastcall aesni_aes256_expand_key_(
AesNI_Block128 key_lo,
AesNI_Block128 key_hi,
AesNI_Aes256_RoundKeys* key_schedule)
{
AesNI_Block128 prev_lo, prev_hi;
AesNI_Block128 hwgen;
prev_lo = key_schedule->keys[0] = key_lo;
prev_hi = key_schedule->keys[1] = key_hi;
hwgen = _mm_aeskeygenassist_si128(prev_hi, 0x01);
hwgen = _mm_shuffle_epi32(hwgen, 0xff);
key_schedule->keys[2] = aesni_aes256_expand_key_assist(&prev_lo, &prev_hi, hwgen);
hwgen = _mm_aeskeygenassist_si128(prev_hi, 0);
hwgen = _mm_shuffle_epi32(hwgen, 0xaa);
key_schedule->keys[3] = aesni_aes256_expand_key_assist(&prev_lo, &prev_hi, hwgen);
hwgen = _mm_aeskeygenassist_si128(prev_hi, 0x02);
hwgen = _mm_shuffle_epi32(hwgen, 0xff);
key_schedule->keys[4] = aesni_aes256_expand_key_assist(&prev_lo, &prev_hi, hwgen);
hwgen = _mm_aeskeygenassist_si128(prev_hi, 0);
hwgen = _mm_shuffle_epi32(hwgen, 0xaa);
key_schedule->keys[5] = aesni_aes256_expand_key_assist(&prev_lo, &prev_hi, hwgen);
hwgen = _mm_aeskeygenassist_si128(prev_hi, 0x04);
hwgen = _mm_shuffle_epi32(hwgen, 0xff);
key_schedule->keys[6] = aesni_aes256_expand_key_assist(&prev_lo, &prev_hi, hwgen);
hwgen = _mm_aeskeygenassist_si128(prev_hi, 0);
hwgen = _mm_shuffle_epi32(hwgen, 0xaa);
key_schedule->keys[7] = aesni_aes256_expand_key_assist(&prev_lo, &prev_hi, hwgen);
hwgen = _mm_aeskeygenassist_si128(prev_hi, 0x08);
hwgen = _mm_shuffle_epi32(hwgen, 0xff);
key_schedule->keys[8] = aesni_aes256_expand_key_assist(&prev_lo, &prev_hi, hwgen);
hwgen = _mm_aeskeygenassist_si128(prev_hi, 0);
hwgen = _mm_shuffle_epi32(hwgen, 0xaa);
key_schedule->keys[9] = aesni_aes256_expand_key_assist(&prev_lo, &prev_hi, hwgen);
hwgen = _mm_aeskeygenassist_si128(prev_hi, 0x10);
hwgen = _mm_shuffle_epi32(hwgen, 0xff);
key_schedule->keys[10] = aesni_aes256_expand_key_assist(&prev_lo, &prev_hi, hwgen);
hwgen = _mm_aeskeygenassist_si128(prev_hi, 0);
hwgen = _mm_shuffle_epi32(hwgen, 0xaa);
key_schedule->keys[11] = aesni_aes256_expand_key_assist(&prev_lo, &prev_hi, hwgen);
hwgen = _mm_aeskeygenassist_si128(prev_hi, 0x20);
hwgen = _mm_shuffle_epi32(hwgen, 0xff);
key_schedule->keys[12] = aesni_aes256_expand_key_assist(&prev_lo, &prev_hi, hwgen);
hwgen = _mm_aeskeygenassist_si128(prev_hi, 0);
hwgen = _mm_shuffle_epi32(hwgen, 0xaa);
key_schedule->keys[13] = aesni_aes256_expand_key_assist(&prev_lo, &prev_hi, hwgen);
hwgen = _mm_aeskeygenassist_si128(prev_hi, 0x40);
hwgen = _mm_shuffle_epi32(hwgen, 0xff);
key_schedule->keys[14] = aesni_aes256_expand_key_assist(&prev_lo, &prev_hi, hwgen);
}
void __fastcall aesni_aes256_derive_decryption_keys_(
const AesNI_Aes256_RoundKeys* key_schedule,
AesNI_Aes256_RoundKeys* inverted_schedule)
{
inverted_schedule->keys[0] = key_schedule->keys[14];
inverted_schedule->keys[1] = _mm_aesimc_si128(key_schedule->keys[13]);
inverted_schedule->keys[2] = _mm_aesimc_si128(key_schedule->keys[12]);
inverted_schedule->keys[3] = _mm_aesimc_si128(key_schedule->keys[11]);
inverted_schedule->keys[4] = _mm_aesimc_si128(key_schedule->keys[10]);
inverted_schedule->keys[5] = _mm_aesimc_si128(key_schedule->keys[9]);
inverted_schedule->keys[6] = _mm_aesimc_si128(key_schedule->keys[8]);
inverted_schedule->keys[7] = _mm_aesimc_si128(key_schedule->keys[7]);
inverted_schedule->keys[8] = _mm_aesimc_si128(key_schedule->keys[6]);
inverted_schedule->keys[9] = _mm_aesimc_si128(key_schedule->keys[5]);
inverted_schedule->keys[10] = _mm_aesimc_si128(key_schedule->keys[4]);
inverted_schedule->keys[11] = _mm_aesimc_si128(key_schedule->keys[3]);
inverted_schedule->keys[12] = _mm_aesimc_si128(key_schedule->keys[2]);
inverted_schedule->keys[13] = _mm_aesimc_si128(key_schedule->keys[1]);
inverted_schedule->keys[14] = key_schedule->keys[0];
}
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