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|
/**
* AES using Intel's AES-NI instructions
* (C) 2009 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <botan/aes_intel.h>
#include <botan/loadstor.h>
#include <wmmintrin.h>
#include <smmintrin.h>
namespace Botan {
namespace {
__m128i aes_128_key_expansion(__m128i key, __m128i key_with_rcon)
{
key_with_rcon = _mm_shuffle_epi32(key_with_rcon, _MM_SHUFFLE(3,3,3,3));
key = _mm_xor_si128(key, _mm_slli_si128(key, 4));
key = _mm_xor_si128(key, _mm_slli_si128(key, 4));
key = _mm_xor_si128(key, _mm_slli_si128(key, 4));
return _mm_xor_si128(key, key_with_rcon);
}
void aes_192_key_expansion(__m128i* K1, __m128i* K2, __m128i key2_with_rcon,
u32bit out[])
{
__m128i key1 = *K1;
__m128i key2 = *K2;
key2_with_rcon = _mm_shuffle_epi32(key2_with_rcon, _MM_SHUFFLE(1,1,1,1));
key1 = _mm_xor_si128(key1, _mm_slli_si128(key1, 4));
key1 = _mm_xor_si128(key1, _mm_slli_si128(key1, 4));
key1 = _mm_xor_si128(key1, _mm_slli_si128(key1, 4));
key1 = _mm_xor_si128(key1, key2_with_rcon);
key2 = _mm_xor_si128(key2, _mm_slli_si128(key2, 4));
key2 = _mm_xor_si128(key2, _mm_shuffle_epi32(key1, _MM_SHUFFLE(3,3,3,3)));
*K1 = key1;
*K2 = key2;
out[0] = _mm_extract_epi32(key1, 0);
out[1] = _mm_extract_epi32(key1, 1);
out[2] = _mm_extract_epi32(key1, 2);
out[3] = _mm_extract_epi32(key1, 3);
out[4] = _mm_extract_epi32(key2, 0);
out[5] = _mm_extract_epi32(key2, 1);
}
/*
* The second half of the AES-256 key expansion (other half same as AES-128)
*/
__m128i aes_256_key_expansion(__m128i key, __m128i key2)
{
__m128i key_with_rcon = _mm_aeskeygenassist_si128(key2, 0x00);
key_with_rcon = _mm_shuffle_epi32(key_with_rcon, _MM_SHUFFLE(2,2,2,2));
key = _mm_xor_si128(key, _mm_slli_si128(key, 4));
key = _mm_xor_si128(key, _mm_slli_si128(key, 4));
key = _mm_xor_si128(key, _mm_slli_si128(key, 4));
return _mm_xor_si128(key, key_with_rcon);
}
}
#define AES_ENC_4_ROUNDS(K) \
do \
{ \
B0 = _mm_aesenc_si128(B0, K); \
B1 = _mm_aesenc_si128(B1, K); \
B2 = _mm_aesenc_si128(B2, K); \
B3 = _mm_aesenc_si128(B3, K); \
} while(0)
#define AES_ENC_4_LAST_ROUNDS(K) \
do \
{ \
B0 = _mm_aesenclast_si128(B0, K); \
B1 = _mm_aesenclast_si128(B1, K); \
B2 = _mm_aesenclast_si128(B2, K); \
B3 = _mm_aesenclast_si128(B3, K); \
} while(0)
#define AES_DEC_4_ROUNDS(K) \
do \
{ \
B0 = _mm_aesdec_si128(B0, K); \
B1 = _mm_aesdec_si128(B1, K); \
B2 = _mm_aesdec_si128(B2, K); \
B3 = _mm_aesdec_si128(B3, K); \
} while(0)
#define AES_DEC_4_LAST_ROUNDS(K) \
do \
{ \
B0 = _mm_aesdeclast_si128(B0, K); \
B1 = _mm_aesdeclast_si128(B1, K); \
B2 = _mm_aesdeclast_si128(B2, K); \
B3 = _mm_aesdeclast_si128(B3, K); \
} while(0)
/**
* AES-128 Encryption
*/
void AES_128_Intel::encrypt_n(const byte in[], byte out[], u32bit blocks) const
{
const __m128i* in_mm = (const __m128i*)in;
__m128i* out_mm = (__m128i*)out;
const __m128i* key_mm = (const __m128i*)&EK[0];
__m128i K0 = _mm_loadu_si128(key_mm);
__m128i K1 = _mm_loadu_si128(key_mm + 1);
__m128i K2 = _mm_loadu_si128(key_mm + 2);
__m128i K3 = _mm_loadu_si128(key_mm + 3);
__m128i K4 = _mm_loadu_si128(key_mm + 4);
__m128i K5 = _mm_loadu_si128(key_mm + 5);
__m128i K6 = _mm_loadu_si128(key_mm + 6);
__m128i K7 = _mm_loadu_si128(key_mm + 7);
__m128i K8 = _mm_loadu_si128(key_mm + 8);
__m128i K9 = _mm_loadu_si128(key_mm + 9);
__m128i K10 = _mm_loadu_si128(key_mm + 10);
while(blocks >= 4)
{
__m128i B0 = _mm_loadu_si128(in_mm + 0);
__m128i B1 = _mm_loadu_si128(in_mm + 1);
__m128i B2 = _mm_loadu_si128(in_mm + 2);
__m128i B3 = _mm_loadu_si128(in_mm + 3);
B0 = _mm_xor_si128(B0, K0);
B1 = _mm_xor_si128(B1, K0);
B2 = _mm_xor_si128(B2, K0);
B3 = _mm_xor_si128(B3, K0);
AES_ENC_4_ROUNDS(K1);
AES_ENC_4_ROUNDS(K2);
AES_ENC_4_ROUNDS(K3);
AES_ENC_4_ROUNDS(K4);
AES_ENC_4_ROUNDS(K5);
AES_ENC_4_ROUNDS(K6);
AES_ENC_4_ROUNDS(K7);
AES_ENC_4_ROUNDS(K8);
AES_ENC_4_ROUNDS(K9);
AES_ENC_4_LAST_ROUNDS(K10);
_mm_storeu_si128(out_mm + 0, B0);
_mm_storeu_si128(out_mm + 1, B1);
_mm_storeu_si128(out_mm + 2, B2);
_mm_storeu_si128(out_mm + 3, B3);
blocks -= 4;
in_mm += 4;
out_mm += 4;
}
for(u32bit i = 0; i != blocks; ++i)
{
__m128i B = _mm_loadu_si128(in_mm + i);
B = _mm_xor_si128(B, K0);
B = _mm_aesenc_si128(B, K1);
B = _mm_aesenc_si128(B, K2);
B = _mm_aesenc_si128(B, K3);
B = _mm_aesenc_si128(B, K4);
B = _mm_aesenc_si128(B, K5);
B = _mm_aesenc_si128(B, K6);
B = _mm_aesenc_si128(B, K7);
B = _mm_aesenc_si128(B, K8);
B = _mm_aesenc_si128(B, K9);
B = _mm_aesenclast_si128(B, K10);
_mm_storeu_si128(out_mm + i, B);
}
}
/**
* AES-128 Decryption
*/
void AES_128_Intel::decrypt_n(const byte in[], byte out[], u32bit blocks) const
{
const __m128i* in_mm = (const __m128i*)in;
__m128i* out_mm = (__m128i*)out;
const __m128i* key_mm = (const __m128i*)&DK[0];
__m128i K0 = _mm_loadu_si128(key_mm);
__m128i K1 = _mm_loadu_si128(key_mm + 1);
__m128i K2 = _mm_loadu_si128(key_mm + 2);
__m128i K3 = _mm_loadu_si128(key_mm + 3);
__m128i K4 = _mm_loadu_si128(key_mm + 4);
__m128i K5 = _mm_loadu_si128(key_mm + 5);
__m128i K6 = _mm_loadu_si128(key_mm + 6);
__m128i K7 = _mm_loadu_si128(key_mm + 7);
__m128i K8 = _mm_loadu_si128(key_mm + 8);
__m128i K9 = _mm_loadu_si128(key_mm + 9);
__m128i K10 = _mm_loadu_si128(key_mm + 10);
while(blocks >= 4)
{
__m128i B0 = _mm_loadu_si128(in_mm + 0);
__m128i B1 = _mm_loadu_si128(in_mm + 1);
__m128i B2 = _mm_loadu_si128(in_mm + 2);
__m128i B3 = _mm_loadu_si128(in_mm + 3);
B0 = _mm_xor_si128(B0, K0);
B1 = _mm_xor_si128(B1, K0);
B2 = _mm_xor_si128(B2, K0);
B3 = _mm_xor_si128(B3, K0);
AES_DEC_4_ROUNDS(K1);
AES_DEC_4_ROUNDS(K2);
AES_DEC_4_ROUNDS(K3);
AES_DEC_4_ROUNDS(K4);
AES_DEC_4_ROUNDS(K5);
AES_DEC_4_ROUNDS(K6);
AES_DEC_4_ROUNDS(K7);
AES_DEC_4_ROUNDS(K8);
AES_DEC_4_ROUNDS(K9);
AES_DEC_4_LAST_ROUNDS(K10);
_mm_storeu_si128(out_mm + 0, B0);
_mm_storeu_si128(out_mm + 1, B1);
_mm_storeu_si128(out_mm + 2, B2);
_mm_storeu_si128(out_mm + 3, B3);
blocks -= 4;
in_mm += 4;
out_mm += 4;
}
for(u32bit i = 0; i != blocks; ++i)
{
__m128i B = _mm_loadu_si128(in_mm + i);
B = _mm_xor_si128(B, K0);
B = _mm_aesdec_si128(B, K1);
B = _mm_aesdec_si128(B, K2);
B = _mm_aesdec_si128(B, K3);
B = _mm_aesdec_si128(B, K4);
B = _mm_aesdec_si128(B, K5);
B = _mm_aesdec_si128(B, K6);
B = _mm_aesdec_si128(B, K7);
B = _mm_aesdec_si128(B, K8);
B = _mm_aesdec_si128(B, K9);
B = _mm_aesdeclast_si128(B, K10);
_mm_storeu_si128(out_mm + i, B);
}
}
/**
* AES-128 Key Schedule
*/
void AES_128_Intel::key_schedule(const byte key[], u32bit)
{
#define AES_128_key_exp(K, RCON) \
aes_128_key_expansion(K, _mm_aeskeygenassist_si128(K, RCON))
__m128i K0 = _mm_loadu_si128((const __m128i*)(key));
__m128i K1 = AES_128_key_exp(K0, 0x01);
__m128i K2 = AES_128_key_exp(K1, 0x02);
__m128i K3 = AES_128_key_exp(K2, 0x04);
__m128i K4 = AES_128_key_exp(K3, 0x08);
__m128i K5 = AES_128_key_exp(K4, 0x10);
__m128i K6 = AES_128_key_exp(K5, 0x20);
__m128i K7 = AES_128_key_exp(K6, 0x40);
__m128i K8 = AES_128_key_exp(K7, 0x80);
__m128i K9 = AES_128_key_exp(K8, 0x1B);
__m128i K10 = AES_128_key_exp(K9, 0x36);
__m128i* EK_mm = (__m128i*)&EK[0];
_mm_storeu_si128(EK_mm , K0);
_mm_storeu_si128(EK_mm + 1, K1);
_mm_storeu_si128(EK_mm + 2, K2);
_mm_storeu_si128(EK_mm + 3, K3);
_mm_storeu_si128(EK_mm + 4, K4);
_mm_storeu_si128(EK_mm + 5, K5);
_mm_storeu_si128(EK_mm + 6, K6);
_mm_storeu_si128(EK_mm + 7, K7);
_mm_storeu_si128(EK_mm + 8, K8);
_mm_storeu_si128(EK_mm + 9, K9);
_mm_storeu_si128(EK_mm + 10, K10);
// Now generate decryption keys
__m128i* DK_mm = (__m128i*)&DK[0];
_mm_storeu_si128(DK_mm , K10);
_mm_storeu_si128(DK_mm + 1, _mm_aesimc_si128(K9));
_mm_storeu_si128(DK_mm + 2, _mm_aesimc_si128(K8));
_mm_storeu_si128(DK_mm + 3, _mm_aesimc_si128(K7));
_mm_storeu_si128(DK_mm + 4, _mm_aesimc_si128(K6));
_mm_storeu_si128(DK_mm + 5, _mm_aesimc_si128(K5));
_mm_storeu_si128(DK_mm + 6, _mm_aesimc_si128(K4));
_mm_storeu_si128(DK_mm + 7, _mm_aesimc_si128(K3));
_mm_storeu_si128(DK_mm + 8, _mm_aesimc_si128(K2));
_mm_storeu_si128(DK_mm + 9, _mm_aesimc_si128(K1));
_mm_storeu_si128(DK_mm + 10, K0);
}
/**
* Clear memory of sensitive data
*/
void AES_128_Intel::clear()
{
EK.clear();
DK.clear();
}
/**
* AES-192 Encryption
*/
void AES_192_Intel::encrypt_n(const byte in[], byte out[], u32bit blocks) const
{
const __m128i* in_mm = (const __m128i*)in;
__m128i* out_mm = (__m128i*)out;
const __m128i* key_mm = (const __m128i*)&EK[0];
__m128i K0 = _mm_loadu_si128(key_mm);
__m128i K1 = _mm_loadu_si128(key_mm + 1);
__m128i K2 = _mm_loadu_si128(key_mm + 2);
__m128i K3 = _mm_loadu_si128(key_mm + 3);
__m128i K4 = _mm_loadu_si128(key_mm + 4);
__m128i K5 = _mm_loadu_si128(key_mm + 5);
__m128i K6 = _mm_loadu_si128(key_mm + 6);
__m128i K7 = _mm_loadu_si128(key_mm + 7);
__m128i K8 = _mm_loadu_si128(key_mm + 8);
__m128i K9 = _mm_loadu_si128(key_mm + 9);
__m128i K10 = _mm_loadu_si128(key_mm + 10);
__m128i K11 = _mm_loadu_si128(key_mm + 11);
__m128i K12 = _mm_loadu_si128(key_mm + 12);
while(blocks >= 4)
{
__m128i B0 = _mm_loadu_si128(in_mm + 0);
__m128i B1 = _mm_loadu_si128(in_mm + 1);
__m128i B2 = _mm_loadu_si128(in_mm + 2);
__m128i B3 = _mm_loadu_si128(in_mm + 3);
B0 = _mm_xor_si128(B0, K0);
B1 = _mm_xor_si128(B1, K0);
B2 = _mm_xor_si128(B2, K0);
B3 = _mm_xor_si128(B3, K0);
AES_ENC_4_ROUNDS(K1);
AES_ENC_4_ROUNDS(K2);
AES_ENC_4_ROUNDS(K3);
AES_ENC_4_ROUNDS(K4);
AES_ENC_4_ROUNDS(K5);
AES_ENC_4_ROUNDS(K6);
AES_ENC_4_ROUNDS(K7);
AES_ENC_4_ROUNDS(K8);
AES_ENC_4_ROUNDS(K9);
AES_ENC_4_ROUNDS(K10);
AES_ENC_4_ROUNDS(K11);
AES_ENC_4_LAST_ROUNDS(K12);
_mm_storeu_si128(out_mm + 0, B0);
_mm_storeu_si128(out_mm + 1, B1);
_mm_storeu_si128(out_mm + 2, B2);
_mm_storeu_si128(out_mm + 3, B3);
blocks -= 4;
in_mm += 4;
out_mm += 4;
}
for(u32bit i = 0; i != blocks; ++i)
{
__m128i B = _mm_loadu_si128(in_mm + i);
B = _mm_xor_si128(B, K0);
B = _mm_aesenc_si128(B, K1);
B = _mm_aesenc_si128(B, K2);
B = _mm_aesenc_si128(B, K3);
B = _mm_aesenc_si128(B, K4);
B = _mm_aesenc_si128(B, K5);
B = _mm_aesenc_si128(B, K6);
B = _mm_aesenc_si128(B, K7);
B = _mm_aesenc_si128(B, K8);
B = _mm_aesenc_si128(B, K9);
B = _mm_aesenc_si128(B, K10);
B = _mm_aesenc_si128(B, K11);
B = _mm_aesenclast_si128(B, K12);
_mm_storeu_si128(out_mm + i, B);
}
}
/**
* AES-192 Decryption
*/
void AES_192_Intel::decrypt_n(const byte in[], byte out[], u32bit blocks) const
{
const __m128i* in_mm = (const __m128i*)in;
__m128i* out_mm = (__m128i*)out;
const __m128i* key_mm = (const __m128i*)&DK[0];
__m128i K0 = _mm_loadu_si128(key_mm);
__m128i K1 = _mm_loadu_si128(key_mm + 1);
__m128i K2 = _mm_loadu_si128(key_mm + 2);
__m128i K3 = _mm_loadu_si128(key_mm + 3);
__m128i K4 = _mm_loadu_si128(key_mm + 4);
__m128i K5 = _mm_loadu_si128(key_mm + 5);
__m128i K6 = _mm_loadu_si128(key_mm + 6);
__m128i K7 = _mm_loadu_si128(key_mm + 7);
__m128i K8 = _mm_loadu_si128(key_mm + 8);
__m128i K9 = _mm_loadu_si128(key_mm + 9);
__m128i K10 = _mm_loadu_si128(key_mm + 10);
__m128i K11 = _mm_loadu_si128(key_mm + 11);
__m128i K12 = _mm_loadu_si128(key_mm + 12);
while(blocks >= 4)
{
__m128i B0 = _mm_loadu_si128(in_mm + 0);
__m128i B1 = _mm_loadu_si128(in_mm + 1);
__m128i B2 = _mm_loadu_si128(in_mm + 2);
__m128i B3 = _mm_loadu_si128(in_mm + 3);
B0 = _mm_xor_si128(B0, K0);
B1 = _mm_xor_si128(B1, K0);
B2 = _mm_xor_si128(B2, K0);
B3 = _mm_xor_si128(B3, K0);
AES_DEC_4_ROUNDS(K1);
AES_DEC_4_ROUNDS(K2);
AES_DEC_4_ROUNDS(K3);
AES_DEC_4_ROUNDS(K4);
AES_DEC_4_ROUNDS(K5);
AES_DEC_4_ROUNDS(K6);
AES_DEC_4_ROUNDS(K7);
AES_DEC_4_ROUNDS(K8);
AES_DEC_4_ROUNDS(K9);
AES_DEC_4_ROUNDS(K10);
AES_DEC_4_ROUNDS(K11);
AES_DEC_4_LAST_ROUNDS(K12);
_mm_storeu_si128(out_mm + 0, B0);
_mm_storeu_si128(out_mm + 1, B1);
_mm_storeu_si128(out_mm + 2, B2);
_mm_storeu_si128(out_mm + 3, B3);
blocks -= 4;
in_mm += 4;
out_mm += 4;
}
for(u32bit i = 0; i != blocks; ++i)
{
__m128i B = _mm_loadu_si128(in_mm + i);
B = _mm_xor_si128(B, K0);
B = _mm_aesdec_si128(B, K1);
B = _mm_aesdec_si128(B, K2);
B = _mm_aesdec_si128(B, K3);
B = _mm_aesdec_si128(B, K4);
B = _mm_aesdec_si128(B, K5);
B = _mm_aesdec_si128(B, K6);
B = _mm_aesdec_si128(B, K7);
B = _mm_aesdec_si128(B, K8);
B = _mm_aesdec_si128(B, K9);
B = _mm_aesdec_si128(B, K10);
B = _mm_aesdec_si128(B, K11);
B = _mm_aesdeclast_si128(B, K12);
_mm_storeu_si128(out_mm + i, B);
}
}
/**
* AES-192 Key Schedule
*/
void AES_192_Intel::key_schedule(const byte key[], u32bit)
{
__m128i K0 = _mm_loadu_si128((const __m128i*)(key));
__m128i K1 = _mm_loadu_si128((const __m128i*)(key + 8));
K1 = _mm_srli_si128(K1, 8);
EK[0] = load_le<u32bit>(key, 0);
EK[1] = load_le<u32bit>(key, 1);
EK[2] = load_le<u32bit>(key, 2);
EK[3] = load_le<u32bit>(key, 3);
EK[4] = load_le<u32bit>(key, 4);
EK[5] = load_le<u32bit>(key, 5);
aes_192_key_expansion(&K0, &K1, _mm_aeskeygenassist_si128(K1, 0x01), EK + 6);
aes_192_key_expansion(&K0, &K1, _mm_aeskeygenassist_si128(K1, 0x02), EK + 12);
aes_192_key_expansion(&K0, &K1, _mm_aeskeygenassist_si128(K1, 0x04), EK + 18);
aes_192_key_expansion(&K0, &K1, _mm_aeskeygenassist_si128(K1, 0x08), EK + 24);
aes_192_key_expansion(&K0, &K1, _mm_aeskeygenassist_si128(K1, 0x10), EK + 30);
aes_192_key_expansion(&K0, &K1, _mm_aeskeygenassist_si128(K1, 0x20), EK + 36);
aes_192_key_expansion(&K0, &K1, _mm_aeskeygenassist_si128(K1, 0x40), EK + 42);
aes_192_key_expansion(&K0, &K1, _mm_aeskeygenassist_si128(K1, 0x80), EK + 48);
// Now generate decryption keys
const __m128i* EK_mm = (const __m128i*)&EK[0];
__m128i* DK_mm = (__m128i*)&DK[0];
_mm_storeu_si128(DK_mm , EK_mm[12]);
_mm_storeu_si128(DK_mm + 1, _mm_aesimc_si128(EK_mm[11]));
_mm_storeu_si128(DK_mm + 2, _mm_aesimc_si128(EK_mm[10]));
_mm_storeu_si128(DK_mm + 3, _mm_aesimc_si128(EK_mm[9]));
_mm_storeu_si128(DK_mm + 4, _mm_aesimc_si128(EK_mm[8]));
_mm_storeu_si128(DK_mm + 5, _mm_aesimc_si128(EK_mm[7]));
_mm_storeu_si128(DK_mm + 6, _mm_aesimc_si128(EK_mm[6]));
_mm_storeu_si128(DK_mm + 7, _mm_aesimc_si128(EK_mm[5]));
_mm_storeu_si128(DK_mm + 8, _mm_aesimc_si128(EK_mm[4]));
_mm_storeu_si128(DK_mm + 9, _mm_aesimc_si128(EK_mm[3]));
_mm_storeu_si128(DK_mm + 10, _mm_aesimc_si128(EK_mm[2]));
_mm_storeu_si128(DK_mm + 11, _mm_aesimc_si128(EK_mm[1]));
_mm_storeu_si128(DK_mm + 12, EK_mm[0]);
}
/**
* Clear memory of sensitive data
*/
void AES_192_Intel::clear()
{
EK.clear();
DK.clear();
}
/**
* AES-256 Encryption
*/
void AES_256_Intel::encrypt_n(const byte in[], byte out[], u32bit blocks) const
{
const __m128i* in_mm = (const __m128i*)in;
__m128i* out_mm = (__m128i*)out;
const __m128i* key_mm = (const __m128i*)&EK[0];
__m128i K0 = _mm_loadu_si128(key_mm);
__m128i K1 = _mm_loadu_si128(key_mm + 1);
__m128i K2 = _mm_loadu_si128(key_mm + 2);
__m128i K3 = _mm_loadu_si128(key_mm + 3);
__m128i K4 = _mm_loadu_si128(key_mm + 4);
__m128i K5 = _mm_loadu_si128(key_mm + 5);
__m128i K6 = _mm_loadu_si128(key_mm + 6);
__m128i K7 = _mm_loadu_si128(key_mm + 7);
__m128i K8 = _mm_loadu_si128(key_mm + 8);
__m128i K9 = _mm_loadu_si128(key_mm + 9);
__m128i K10 = _mm_loadu_si128(key_mm + 10);
__m128i K11 = _mm_loadu_si128(key_mm + 11);
__m128i K12 = _mm_loadu_si128(key_mm + 12);
__m128i K13 = _mm_loadu_si128(key_mm + 13);
__m128i K14 = _mm_loadu_si128(key_mm + 14);
while(blocks >= 4)
{
__m128i B0 = _mm_loadu_si128(in_mm + 0);
__m128i B1 = _mm_loadu_si128(in_mm + 1);
__m128i B2 = _mm_loadu_si128(in_mm + 2);
__m128i B3 = _mm_loadu_si128(in_mm + 3);
B0 = _mm_xor_si128(B0, K0);
B1 = _mm_xor_si128(B1, K0);
B2 = _mm_xor_si128(B2, K0);
B3 = _mm_xor_si128(B3, K0);
AES_ENC_4_ROUNDS(K1);
AES_ENC_4_ROUNDS(K2);
AES_ENC_4_ROUNDS(K3);
AES_ENC_4_ROUNDS(K4);
AES_ENC_4_ROUNDS(K5);
AES_ENC_4_ROUNDS(K6);
AES_ENC_4_ROUNDS(K7);
AES_ENC_4_ROUNDS(K8);
AES_ENC_4_ROUNDS(K9);
AES_ENC_4_ROUNDS(K10);
AES_ENC_4_ROUNDS(K11);
AES_ENC_4_ROUNDS(K12);
AES_ENC_4_ROUNDS(K13);
AES_ENC_4_LAST_ROUNDS(K14);
_mm_storeu_si128(out_mm + 0, B0);
_mm_storeu_si128(out_mm + 1, B1);
_mm_storeu_si128(out_mm + 2, B2);
_mm_storeu_si128(out_mm + 3, B3);
blocks -= 4;
in_mm += 4;
out_mm += 4;
}
for(u32bit i = 0; i != blocks; ++i)
{
__m128i B = _mm_loadu_si128(in_mm + i);
B = _mm_xor_si128(B, K0);
B = _mm_aesenc_si128(B, K1);
B = _mm_aesenc_si128(B, K2);
B = _mm_aesenc_si128(B, K3);
B = _mm_aesenc_si128(B, K4);
B = _mm_aesenc_si128(B, K5);
B = _mm_aesenc_si128(B, K6);
B = _mm_aesenc_si128(B, K7);
B = _mm_aesenc_si128(B, K8);
B = _mm_aesenc_si128(B, K9);
B = _mm_aesenc_si128(B, K10);
B = _mm_aesenc_si128(B, K11);
B = _mm_aesenc_si128(B, K12);
B = _mm_aesenc_si128(B, K13);
B = _mm_aesenclast_si128(B, K14);
_mm_storeu_si128(out_mm + i, B);
}
}
/**
* AES-256 Decryption
*/
void AES_256_Intel::decrypt_n(const byte in[], byte out[], u32bit blocks) const
{
const __m128i* in_mm = (const __m128i*)in;
__m128i* out_mm = (__m128i*)out;
const __m128i* key_mm = (const __m128i*)&DK[0];
__m128i K0 = _mm_loadu_si128(key_mm);
__m128i K1 = _mm_loadu_si128(key_mm + 1);
__m128i K2 = _mm_loadu_si128(key_mm + 2);
__m128i K3 = _mm_loadu_si128(key_mm + 3);
__m128i K4 = _mm_loadu_si128(key_mm + 4);
__m128i K5 = _mm_loadu_si128(key_mm + 5);
__m128i K6 = _mm_loadu_si128(key_mm + 6);
__m128i K7 = _mm_loadu_si128(key_mm + 7);
__m128i K8 = _mm_loadu_si128(key_mm + 8);
__m128i K9 = _mm_loadu_si128(key_mm + 9);
__m128i K10 = _mm_loadu_si128(key_mm + 10);
__m128i K11 = _mm_loadu_si128(key_mm + 11);
__m128i K12 = _mm_loadu_si128(key_mm + 12);
__m128i K13 = _mm_loadu_si128(key_mm + 13);
__m128i K14 = _mm_loadu_si128(key_mm + 14);
while(blocks >= 4)
{
__m128i B0 = _mm_loadu_si128(in_mm + 0);
__m128i B1 = _mm_loadu_si128(in_mm + 1);
__m128i B2 = _mm_loadu_si128(in_mm + 2);
__m128i B3 = _mm_loadu_si128(in_mm + 3);
B0 = _mm_xor_si128(B0, K0);
B1 = _mm_xor_si128(B1, K0);
B2 = _mm_xor_si128(B2, K0);
B3 = _mm_xor_si128(B3, K0);
AES_DEC_4_ROUNDS(K1);
AES_DEC_4_ROUNDS(K2);
AES_DEC_4_ROUNDS(K3);
AES_DEC_4_ROUNDS(K4);
AES_DEC_4_ROUNDS(K5);
AES_DEC_4_ROUNDS(K6);
AES_DEC_4_ROUNDS(K7);
AES_DEC_4_ROUNDS(K8);
AES_DEC_4_ROUNDS(K9);
AES_DEC_4_ROUNDS(K10);
AES_DEC_4_ROUNDS(K11);
AES_DEC_4_ROUNDS(K12);
AES_DEC_4_ROUNDS(K13);
AES_DEC_4_LAST_ROUNDS(K14);
_mm_storeu_si128(out_mm + 0, B0);
_mm_storeu_si128(out_mm + 1, B1);
_mm_storeu_si128(out_mm + 2, B2);
_mm_storeu_si128(out_mm + 3, B3);
blocks -= 4;
in_mm += 4;
out_mm += 4;
}
for(u32bit i = 0; i != blocks; ++i)
{
__m128i B = _mm_loadu_si128(in_mm + i);
B = _mm_xor_si128(B, K0);
B = _mm_aesdec_si128(B, K1);
B = _mm_aesdec_si128(B, K2);
B = _mm_aesdec_si128(B, K3);
B = _mm_aesdec_si128(B, K4);
B = _mm_aesdec_si128(B, K5);
B = _mm_aesdec_si128(B, K6);
B = _mm_aesdec_si128(B, K7);
B = _mm_aesdec_si128(B, K8);
B = _mm_aesdec_si128(B, K9);
B = _mm_aesdec_si128(B, K10);
B = _mm_aesdec_si128(B, K11);
B = _mm_aesdec_si128(B, K12);
B = _mm_aesdec_si128(B, K13);
B = _mm_aesdeclast_si128(B, K14);
_mm_storeu_si128(out_mm + i, B);
}
}
/**
* AES-256 Key Schedule
*/
void AES_256_Intel::key_schedule(const byte key[], u32bit)
{
__m128i K0 = _mm_loadu_si128((const __m128i*)(key));
__m128i K1 = _mm_loadu_si128((const __m128i*)(key + 16));
__m128i K2 = aes_128_key_expansion(K0, _mm_aeskeygenassist_si128(K1, 0x01));
__m128i K3 = aes_256_key_expansion(K1, K2);
__m128i K4 = aes_128_key_expansion(K2, _mm_aeskeygenassist_si128(K3, 0x02));
__m128i K5 = aes_256_key_expansion(K3, K4);
__m128i K6 = aes_128_key_expansion(K4, _mm_aeskeygenassist_si128(K5, 0x04));
__m128i K7 = aes_256_key_expansion(K5, K6);
__m128i K8 = aes_128_key_expansion(K6, _mm_aeskeygenassist_si128(K7, 0x08));
__m128i K9 = aes_256_key_expansion(K7, K8);
__m128i K10 = aes_128_key_expansion(K8, _mm_aeskeygenassist_si128(K9, 0x10));
__m128i K11 = aes_256_key_expansion(K9, K10);
__m128i K12 = aes_128_key_expansion(K10, _mm_aeskeygenassist_si128(K11, 0x20));
__m128i K13 = aes_256_key_expansion(K11, K12);
__m128i K14 = aes_128_key_expansion(K12, _mm_aeskeygenassist_si128(K13, 0x40));
__m128i* EK_mm = (__m128i*)&EK[0];
_mm_storeu_si128(EK_mm , K0);
_mm_storeu_si128(EK_mm + 1, K1);
_mm_storeu_si128(EK_mm + 2, K2);
_mm_storeu_si128(EK_mm + 3, K3);
_mm_storeu_si128(EK_mm + 4, K4);
_mm_storeu_si128(EK_mm + 5, K5);
_mm_storeu_si128(EK_mm + 6, K6);
_mm_storeu_si128(EK_mm + 7, K7);
_mm_storeu_si128(EK_mm + 8, K8);
_mm_storeu_si128(EK_mm + 9, K9);
_mm_storeu_si128(EK_mm + 10, K10);
_mm_storeu_si128(EK_mm + 11, K11);
_mm_storeu_si128(EK_mm + 12, K12);
_mm_storeu_si128(EK_mm + 13, K13);
_mm_storeu_si128(EK_mm + 14, K14);
// Now generate decryption keys
__m128i* DK_mm = (__m128i*)&DK[0];
_mm_storeu_si128(DK_mm , K14);
_mm_storeu_si128(DK_mm + 1, _mm_aesimc_si128(K13));
_mm_storeu_si128(DK_mm + 2, _mm_aesimc_si128(K12));
_mm_storeu_si128(DK_mm + 3, _mm_aesimc_si128(K11));
_mm_storeu_si128(DK_mm + 4, _mm_aesimc_si128(K10));
_mm_storeu_si128(DK_mm + 5, _mm_aesimc_si128(K9));
_mm_storeu_si128(DK_mm + 6, _mm_aesimc_si128(K8));
_mm_storeu_si128(DK_mm + 7, _mm_aesimc_si128(K7));
_mm_storeu_si128(DK_mm + 8, _mm_aesimc_si128(K6));
_mm_storeu_si128(DK_mm + 9, _mm_aesimc_si128(K5));
_mm_storeu_si128(DK_mm + 10, _mm_aesimc_si128(K4));
_mm_storeu_si128(DK_mm + 11, _mm_aesimc_si128(K3));
_mm_storeu_si128(DK_mm + 12, _mm_aesimc_si128(K2));
_mm_storeu_si128(DK_mm + 13, _mm_aesimc_si128(K1));
_mm_storeu_si128(DK_mm + 14, K0);
}
/**
* Clear memory of sensitive data
*/
void AES_256_Intel::clear()
{
EK.clear();
DK.clear();
}
}
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