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/*
* Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
* This file is part of the "AES tools" project.
* For details, see https://github.com/egor-tensin/aes-tools.
* Distributed under the MIT License.
*/
#include <aes/all.h>
#include <emmintrin.h>
#include <wmmintrin.h>
AES_Block __fastcall aes192_encrypt_block_internal(
AES_Block plaintext,
const AES192_RoundKeys* encryption_keys
) {
plaintext = _mm_xor_si128(plaintext, encryption_keys->keys[0]);
plaintext = _mm_aesenc_si128(plaintext, encryption_keys->keys[1]);
plaintext = _mm_aesenc_si128(plaintext, encryption_keys->keys[2]);
plaintext = _mm_aesenc_si128(plaintext, encryption_keys->keys[3]);
plaintext = _mm_aesenc_si128(plaintext, encryption_keys->keys[4]);
plaintext = _mm_aesenc_si128(plaintext, encryption_keys->keys[5]);
plaintext = _mm_aesenc_si128(plaintext, encryption_keys->keys[6]);
plaintext = _mm_aesenc_si128(plaintext, encryption_keys->keys[7]);
plaintext = _mm_aesenc_si128(plaintext, encryption_keys->keys[8]);
plaintext = _mm_aesenc_si128(plaintext, encryption_keys->keys[9]);
plaintext = _mm_aesenc_si128(plaintext, encryption_keys->keys[10]);
plaintext = _mm_aesenc_si128(plaintext, encryption_keys->keys[11]);
return _mm_aesenclast_si128(plaintext, encryption_keys->keys[12]);
}
AES_Block __fastcall aes192_decrypt_block_internal(
AES_Block ciphertext,
const AES192_RoundKeys* decryption_keys
) {
ciphertext = _mm_xor_si128(ciphertext, decryption_keys->keys[0]);
ciphertext = _mm_aesdec_si128(ciphertext, decryption_keys->keys[1]);
ciphertext = _mm_aesdec_si128(ciphertext, decryption_keys->keys[2]);
ciphertext = _mm_aesdec_si128(ciphertext, decryption_keys->keys[3]);
ciphertext = _mm_aesdec_si128(ciphertext, decryption_keys->keys[4]);
ciphertext = _mm_aesdec_si128(ciphertext, decryption_keys->keys[5]);
ciphertext = _mm_aesdec_si128(ciphertext, decryption_keys->keys[6]);
ciphertext = _mm_aesdec_si128(ciphertext, decryption_keys->keys[7]);
ciphertext = _mm_aesdec_si128(ciphertext, decryption_keys->keys[8]);
ciphertext = _mm_aesdec_si128(ciphertext, decryption_keys->keys[9]);
ciphertext = _mm_aesdec_si128(ciphertext, decryption_keys->keys[10]);
ciphertext = _mm_aesdec_si128(ciphertext, decryption_keys->keys[11]);
return _mm_aesdeclast_si128(ciphertext, decryption_keys->keys[12]);
}
static void __fastcall aes192_expand_key_assist(
AES_Block* prev_lo,
AES_Block* prev_hi,
AES_Block hwgen
) {
AES_Block 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);
hwgen = _mm_shuffle_epi32(hwgen, 0x55);
*prev_lo = _mm_xor_si128(*prev_lo, hwgen);
tmp = _mm_shuffle_epi32(*prev_hi, 0xf3);
*prev_hi = _mm_xor_si128(*prev_hi, tmp);
tmp = _mm_shuffle_epi32(*prev_lo, 0xff);
tmp = _mm_srli_si128(tmp, 8);
*prev_hi = _mm_xor_si128(*prev_hi, tmp);
}
void __fastcall aes192_expand_key_internal(
AES_Block key_lo,
AES_Block key_hi,
AES192_RoundKeys* encryption_keys
) {
encryption_keys->keys[0] = key_lo;
encryption_keys->keys[1] = key_hi;
aes192_expand_key_assist(&key_lo, &key_hi, _mm_aeskeygenassist_si128(key_hi, 0x01));
encryption_keys->keys[1] = _mm_castpd_si128(
_mm_shuffle_pd(_mm_castsi128_pd(encryption_keys->keys[1]), _mm_castsi128_pd(key_lo), 0)
);
encryption_keys->keys[2] =
_mm_castpd_si128(_mm_shuffle_pd(_mm_castsi128_pd(key_lo), _mm_castsi128_pd(key_hi), 1));
aes192_expand_key_assist(&key_lo, &key_hi, _mm_aeskeygenassist_si128(key_hi, 0x02));
encryption_keys->keys[3] = key_lo;
encryption_keys->keys[4] = key_hi;
aes192_expand_key_assist(&key_lo, &key_hi, _mm_aeskeygenassist_si128(key_hi, 0x04));
encryption_keys->keys[4] = _mm_castpd_si128(
_mm_shuffle_pd(_mm_castsi128_pd(encryption_keys->keys[4]), _mm_castsi128_pd(key_lo), 0)
);
encryption_keys->keys[5] =
_mm_castpd_si128(_mm_shuffle_pd(_mm_castsi128_pd(key_lo), _mm_castsi128_pd(key_hi), 1));
aes192_expand_key_assist(&key_lo, &key_hi, _mm_aeskeygenassist_si128(key_hi, 0x08));
encryption_keys->keys[6] = key_lo;
encryption_keys->keys[7] = key_hi;
aes192_expand_key_assist(&key_lo, &key_hi, _mm_aeskeygenassist_si128(key_hi, 0x10));
encryption_keys->keys[7] = _mm_castpd_si128(
_mm_shuffle_pd(_mm_castsi128_pd(encryption_keys->keys[7]), _mm_castsi128_pd(key_lo), 0)
);
encryption_keys->keys[8] =
_mm_castpd_si128(_mm_shuffle_pd(_mm_castsi128_pd(key_lo), _mm_castsi128_pd(key_hi), 1));
aes192_expand_key_assist(&key_lo, &key_hi, _mm_aeskeygenassist_si128(key_hi, 0x20));
encryption_keys->keys[9] = key_lo;
encryption_keys->keys[10] = key_hi;
aes192_expand_key_assist(&key_lo, &key_hi, _mm_aeskeygenassist_si128(key_hi, 0x40));
encryption_keys->keys[10] = _mm_castpd_si128(
_mm_shuffle_pd(_mm_castsi128_pd(encryption_keys->keys[10]), _mm_castsi128_pd(key_lo), 0)
);
encryption_keys->keys[11] =
_mm_castpd_si128(_mm_shuffle_pd(_mm_castsi128_pd(key_lo), _mm_castsi128_pd(key_hi), 1));
aes192_expand_key_assist(&key_lo, &key_hi, _mm_aeskeygenassist_si128(key_hi, 0x80));
encryption_keys->keys[12] = key_lo;
}
void __fastcall aes192_derive_decryption_keys_internal(
const AES192_RoundKeys* encryption_keys,
AES192_RoundKeys* decryption_keys
) {
decryption_keys->keys[0] = encryption_keys->keys[12];
decryption_keys->keys[1] = _mm_aesimc_si128(encryption_keys->keys[11]);
decryption_keys->keys[2] = _mm_aesimc_si128(encryption_keys->keys[10]);
decryption_keys->keys[3] = _mm_aesimc_si128(encryption_keys->keys[9]);
decryption_keys->keys[4] = _mm_aesimc_si128(encryption_keys->keys[8]);
decryption_keys->keys[5] = _mm_aesimc_si128(encryption_keys->keys[7]);
decryption_keys->keys[6] = _mm_aesimc_si128(encryption_keys->keys[6]);
decryption_keys->keys[7] = _mm_aesimc_si128(encryption_keys->keys[5]);
decryption_keys->keys[8] = _mm_aesimc_si128(encryption_keys->keys[4]);
decryption_keys->keys[9] = _mm_aesimc_si128(encryption_keys->keys[3]);
decryption_keys->keys[10] = _mm_aesimc_si128(encryption_keys->keys[2]);
decryption_keys->keys[11] = _mm_aesimc_si128(encryption_keys->keys[1]);
decryption_keys->keys[12] = encryption_keys->keys[0];
}
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