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Implement intrinsic AES

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This commit is contained in:
Manuel Thalmann 2023-12-19 17:55:24 +01:00
parent 3a916f6a0b
commit a0d79770e9
1 changed files with 62 additions and 151 deletions
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213
aes-intrinsic/aes.cpp
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@ -1,10 +1,14 @@
#include <chrono> #include <chrono>
#include <csignal>
#include <cstdint> #include <cstdint>
#include <cstdio> #include <cstdio>
#include <cstring> #include <cstring>
#include <emmintrin.h>
#include <iostream> #include <iostream>
#include <stdint.h> #include <stdint.h>
#include <stdlib.h> #include <stdlib.h>
#include <immintrin.h>
#include <wmmintrin.h>
/* AES-128 simple implementation template and testing */ /* AES-128 simple implementation template and testing */
@ -15,90 +19,28 @@ AES specification:
http://csrc.nist.gov/publications/fips/fips197/fips-197.pdf http://csrc.nist.gov/publications/fips/fips197/fips-197.pdf
*/ */
#define WORD(byte0, byte1, byte2, byte3) ((((((uint16_t)(byte3 << 8) | byte2) << 8) | byte1) << 8) | byte0)
#define WBYTE(value, position) (((uint32_t)value >> (position * 8)) & 0xFF)
/* AES Constants */ /* AES Constants */
// AES polynomial // AES polynomial
const uint16_t POLYNOMIAL = 0b100011011; const uint16_t POLYNOMIAL = 0b100011011;
// forward sbox __m128i computeKey(__m128i key, __m128i expansionSource) {
const uint8_t SBOX[256] = { __m128i tmp1 = _mm_shuffle_epi32(expansionSource, 0xFF);
0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, __m128i tmp2;
0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
};
// T-boxes _mm_storeu_si128(&tmp2, key);
uint32_t T0[256]; key = _mm_slli_si128(key, 1 * 4);
uint32_t T1[256]; tmp2 = _mm_xor_si128(tmp2, key);
uint32_t T2[256]; key = _mm_slli_si128(key, 1 * 4);
uint32_t T3[256]; tmp2 = _mm_xor_si128(tmp2, key);
key = _mm_slli_si128(key, 1 * 4);
const uint8_t rCon[12] = { tmp2 = _mm_xor_si128(tmp2, key);
0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, key = _mm_slli_si128(key, 1 * 4);
}; tmp2 = _mm_xor_si128(tmp2, key);
return tmp1 ^ tmp2;
/* AES state type */
typedef uint32_t t_state[4];
void hexprint16(uint8_t *p) {
for (int i = 0; i < 16; i++)
printf("%02hhx ", p[i]);
puts("");
} }
// **************** AES functions **************** void addKey(uint8_t index, __m128i expKey[11], __m128i expSource) {
uint32_t subWord(uint32_t w) { _mm_storeu_si128(&expKey[index], computeKey(expKey[index - 1], expSource));
return WORD(SBOX[WBYTE(w, 0)], SBOX[WBYTE(w, 1)], SBOX[WBYTE(w, 2)], SBOX[WBYTE(w, 3)]);
}
void subBytes(t_state s) {
for (uint8_t i = 0; i < 4; i++) {
s[i] = subWord(s[i]);
}
}
void shiftRows(t_state s) {
for (uint8_t i = 0; i < 4; i++) {
uint32_t mask = 0xFF << (i * 8);
for (uint8_t shiftCount = 0; shiftCount < i; shiftCount++) {
for (uint8_t currentByte = 0; currentByte < 3; currentByte++) {
// Swap s[currentByte] and s[currentByte + 1]
s[currentByte] = s[currentByte] ^ (mask & s[currentByte + 1]);
s[currentByte + 1] = s[currentByte + 1] ^ (mask & s[currentByte]);
s[currentByte] = s[currentByte] ^ (mask & s[currentByte + 1]);
}
}
}
}
uint8_t xtime(uint8_t a) {
uint8_t mask;
if (a & 0b10000000) {
mask = POLYNOMIAL & 0xFF;
}
else {
mask = 0x00;
}
return ((a << 1) ^ mask) & 0xFF;
} }
/* /*
@ -107,73 +49,52 @@ uint8_t xtime(uint8_t a) {
* each round key is 4*32b * each round key is 4*32b
*/ */
// Taken from: https://www.brainkart.com/article/AES-Key-Expansion_8410/ // Taken from: https://www.brainkart.com/article/AES-Key-Expansion_8410/
void expandKey(uint8_t k[16], uint32_t ek[44]) { void expandKey(__m128i key, __m128i expKey[11]) {
for (uint8_t i = 0; i < 4; i++) { __m128i expSource;
ek[i] = WORD(k[i * 4], k[i * 4 + 1], k[i * 4 + 2], k[i * 4 + 3]); _mm_storeu_si128(&expKey[0], key);
}
for (uint8_t i = 4; i < 44; i++) { expSource = _mm_aeskeygenassist_si128(expKey[0], 0x01);
uint32_t key = ek[i - 1]; addKey(1, expKey, expSource);
expSource = _mm_aeskeygenassist_si128(expKey[1], 0x02);
if (i % 4 == 0) { addKey(2, expKey, expSource);
key = (key >> 8) | (key << 24); expSource = _mm_aeskeygenassist_si128(expKey[2], 0x04);
key = subWord(key) ^ rCon[i / 4]; addKey(3, expKey, expSource);
} expSource = _mm_aeskeygenassist_si128(expKey[3], 0x08);
addKey(4, expKey, expSource);
ek[i] = ek[i - 4] ^ key; expSource = _mm_aeskeygenassist_si128(expKey[4], 0x10);
} addKey(5, expKey, expSource);
expSource = _mm_aeskeygenassist_si128(expKey[5], 0x20);
addKey(6, expKey, expSource);
expSource = _mm_aeskeygenassist_si128(expKey[6], 0x40);
addKey(7, expKey, expSource);
expSource = _mm_aeskeygenassist_si128(expKey[7], 0x80);
addKey(8, expKey, expSource);
expSource = _mm_aeskeygenassist_si128(expKey[8], 0x1B);
addKey(9, expKey, expSource);
expSource = _mm_aeskeygenassist_si128(expKey[9], 0x36);
addKey(10, expKey, expSource);
} }
void aes(__m128i *value, __m128i key)
/* Adding expanded round key (prepared before) */
void addRoundKey(t_state s, uint32_t ek[], short round) {
s[0] ^= ek[round];
s[1] ^= ek[round + 1];
s[2] ^= ek[round + 2];
s[3] ^= ek[round + 3];
}
void aes(uint8_t *in, uint8_t *out, uint8_t *skey)
{ {
//... Initialize ... //... Initialize ...
unsigned short round = 0; __m128i expKey[11];
__m128i tmp = _mm_load_si128(value);
t_state state; expandKey(key, expKey);
for (uint8_t i = 0; i < 4; i++) { tmp = _mm_xor_si128(tmp, expKey[0]);
state[i] = WORD(in[i * 4], in[i * 4 + 1], in[i * 4 + 2], in[i * 4 + 3]); tmp = _mm_aesenc_si128(tmp, expKey[1]);
} tmp = _mm_aesenc_si128(tmp, expKey[2]);
tmp = _mm_aesenc_si128(tmp, expKey[3]);
uint32_t expKey[11 * 4]; tmp = _mm_aesenc_si128(tmp, expKey[4]);
tmp = _mm_aesenc_si128(tmp, expKey[5]);
expandKey(skey, expKey); tmp = _mm_aesenc_si128(tmp, expKey[6]);
addRoundKey(state, expKey, 0); tmp = _mm_aesenc_si128(tmp, expKey[7]);
tmp = _mm_aesenc_si128(tmp, expKey[8]);
for (int i = 1; i < 10; i++) { tmp = _mm_aesenc_si128(tmp, expKey[9]);
t_state tmp; tmp = _mm_aesenclast_si128(tmp, expKey[10]);
_mm_storeu_si128(value, tmp);
for (int j = 0; j < 4; j++) {
tmp[j] =
T0[WBYTE(state[j], 0)] ^
T1[WBYTE(state[(j + 1) % 4], 1)] ^
T2[WBYTE(state[(j + 2) % 4], 2)] ^
T3[WBYTE(state[(j + 3) % 4], 3)];
}
memcpy(state, tmp, sizeof(t_state));
addRoundKey(state, expKey, 4 * i);
}
subBytes(state);
shiftRows(state);
addRoundKey(state, expKey, 40);
for (int i = 0; i < 16; i++) {
if (i < 4) out[i] = WBYTE(state[0], i % 4);
else if (i < 8) out[i] = WBYTE(state[1], i % 4);
else if (i < 12) out[i] = WBYTE(state[2], i % 4);
else out[i] = WBYTE(state[3], i % 4);
}
} }
//**************************** //****************************
@ -182,8 +103,8 @@ void aes(uint8_t *in, uint8_t *out, uint8_t *skey)
int main(int argc, char* argv[]) int main(int argc, char* argv[])
{ {
uint32_t cycles = 1000000; uint32_t cycles = 1000000;
uint8_t key[16] = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff }; __m128i key = _mm_setr_epi8(0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff);
uint8_t in[16] = { 0xab, 0xcd, 0xef, 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0x01, 0x23, 0x45, 0x67, 0x89}; __m128i value = _mm_setr_epi8(0xab, 0xcd, 0xef, 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0x01, 0x23, 0x45, 0x67, 0x89);
if (argc > 2) { if (argc > 2) {
std::cerr << "Invalid number of arguments\n"; std::cerr << "Invalid number of arguments\n";
@ -192,20 +113,10 @@ int main(int argc, char* argv[])
cycles = std::atoi(argv[1]); cycles = std::atoi(argv[1]);
} }
for (int i = 0; i <= 0xFF; i++) {
uint8_t a1 = SBOX[i];
uint8_t a2 = xtime(a1);
uint8_t a3 = a2 ^ a1;
T0[i] = WORD(a2, a1, a1, a3);
T1[i] = WORD(a3, a2, a1, a1);
T2[i] = WORD(a1, a3, a2, a1);
T3[i] = WORD(a1, a1, a3, a2);
}
const auto start{std::chrono::steady_clock::now()}; const auto start{std::chrono::steady_clock::now()};
{ {
for (int i = 0; i < cycles; i++) { for (int i = 0; i < cycles; i++) {
aes(in, in, key); aes(&value, key);
} }
} }
const auto end{std::chrono::steady_clock::now()}; const auto end{std::chrono::steady_clock::now()};
@ -214,5 +125,5 @@ int main(int argc, char* argv[])
std::cout << "AES (" << cycles << " runs)\nElapsed time: "; std::cout << "AES (" << cycles << " runs)\nElapsed time: ";
std::cout << milliseconds << "ms\n"; // Before C++20 std::cout << milliseconds << "ms\n"; // Before C++20
exit(in[0]); exit(value[0]);
} }