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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_aes128_encrypt_block_(
AesNI_Block128 plain,
const AesNI_Aes128_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]);
return _mm_aesenclast_si128(plain, key_schedule->keys[10]);
}
AesNI_Block128 __fastcall aesni_aes128_decrypt_block_(
AesNI_Block128 cipher,
const AesNI_Aes128_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]);
return _mm_aesdeclast_si128(cipher, inverted_schedule->keys[10]);
}
static AesNI_Block128 __fastcall aesni_aes128_expand_key_assist(
AesNI_Block128 prev,
AesNI_Block128 hwgen)
{
AesNI_Block128 tmp = prev;
tmp = _mm_slli_si128(tmp, 4);
prev = _mm_xor_si128(prev, tmp);
tmp = _mm_slli_si128(tmp, 4);
prev = _mm_xor_si128(prev, tmp);
tmp = _mm_slli_si128(tmp, 4);
prev = _mm_xor_si128(prev, tmp);
hwgen = _mm_shuffle_epi32(hwgen, 0xff);
prev = _mm_xor_si128(prev, hwgen);
return prev;
}
void __fastcall aesni_aes128_expand_key_(
AesNI_Block128 key,
AesNI_Aes128_RoundKeys* key_schedule)
{
AesNI_Block128 prev = key_schedule->keys[0] = key;
prev = key_schedule->keys[1] = aesni_aes128_expand_key_assist(prev, _mm_aeskeygenassist_si128(prev, 0x01));
prev = key_schedule->keys[2] = aesni_aes128_expand_key_assist(prev, _mm_aeskeygenassist_si128(prev, 0x02));
prev = key_schedule->keys[3] = aesni_aes128_expand_key_assist(prev, _mm_aeskeygenassist_si128(prev, 0x04));
prev = key_schedule->keys[4] = aesni_aes128_expand_key_assist(prev, _mm_aeskeygenassist_si128(prev, 0x08));
prev = key_schedule->keys[5] = aesni_aes128_expand_key_assist(prev, _mm_aeskeygenassist_si128(prev, 0x10));
prev = key_schedule->keys[6] = aesni_aes128_expand_key_assist(prev, _mm_aeskeygenassist_si128(prev, 0x20));
prev = key_schedule->keys[7] = aesni_aes128_expand_key_assist(prev, _mm_aeskeygenassist_si128(prev, 0x40));
prev = key_schedule->keys[8] = aesni_aes128_expand_key_assist(prev, _mm_aeskeygenassist_si128(prev, 0x80));
prev = key_schedule->keys[9] = aesni_aes128_expand_key_assist(prev, _mm_aeskeygenassist_si128(prev, 0x1b));
prev = key_schedule->keys[10] = aesni_aes128_expand_key_assist(prev, _mm_aeskeygenassist_si128(prev, 0x36));
}
void __fastcall aesni_aes128_derive_decryption_keys_(
const AesNI_Aes128_RoundKeys* key_schedule,
AesNI_Aes128_RoundKeys* inverted_schedule)
{
inverted_schedule->keys[0] = key_schedule->keys[10];
inverted_schedule->keys[1] = _mm_aesimc_si128(key_schedule->keys[9]);
inverted_schedule->keys[2] = _mm_aesimc_si128(key_schedule->keys[8]);
inverted_schedule->keys[3] = _mm_aesimc_si128(key_schedule->keys[7]);
inverted_schedule->keys[4] = _mm_aesimc_si128(key_schedule->keys[6]);
inverted_schedule->keys[5] = _mm_aesimc_si128(key_schedule->keys[5]);
inverted_schedule->keys[6] = _mm_aesimc_si128(key_schedule->keys[4]);
inverted_schedule->keys[7] = _mm_aesimc_si128(key_schedule->keys[3]);
inverted_schedule->keys[8] = _mm_aesimc_si128(key_schedule->keys[2]);
inverted_schedule->keys[9] = _mm_aesimc_si128(key_schedule->keys[1]);
inverted_schedule->keys[10] = key_schedule->keys[0];
}
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