130 lines
4.1 KiB
C++
130 lines
4.1 KiB
C++
#include <chrono>
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#include <csignal>
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#include <cstdint>
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#include <cstdio>
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#include <cstring>
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#include <emmintrin.h>
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#include <iostream>
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#include <stdint.h>
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#include <stdlib.h>
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#include <immintrin.h>
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#include <wmmintrin.h>
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/* AES-128 simple implementation template and testing */
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/*
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Author: Manuel Thalmann, thalmman@fit.cvut.cz
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Template: Jiri Bucek 2017
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AES specification:
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http://csrc.nist.gov/publications/fips/fips197/fips-197.pdf
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*/
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/* AES Constants */
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// AES polynomial
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const uint16_t POLYNOMIAL = 0b100011011;
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__m128i computeKey(__m128i key, __m128i expansionSource) {
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__m128i tmp1 = _mm_shuffle_epi32(expansionSource, 0xFF);
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__m128i tmp2;
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_mm_storeu_si128(&tmp2, key);
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key = _mm_slli_si128(key, 1 * 4);
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tmp2 = _mm_xor_si128(tmp2, key);
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key = _mm_slli_si128(key, 1 * 4);
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tmp2 = _mm_xor_si128(tmp2, key);
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key = _mm_slli_si128(key, 1 * 4);
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tmp2 = _mm_xor_si128(tmp2, key);
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key = _mm_slli_si128(key, 1 * 4);
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tmp2 = _mm_xor_si128(tmp2, key);
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return tmp1 ^ tmp2;
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}
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void addKey(uint8_t index, __m128i expKey[11], __m128i expSource) {
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_mm_storeu_si128(&expKey[index], computeKey(expKey[index - 1], expSource));
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}
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/*
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* Key expansion from 128bits (4*32b)
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* to 11 round keys (11*4*32b)
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* each round key is 4*32b
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*/
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// Taken from: https://www.brainkart.com/article/AES-Key-Expansion_8410/
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void expandKey(__m128i key, __m128i expKey[11]) {
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__m128i expSource;
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_mm_storeu_si128(&expKey[0], key);
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expSource = _mm_aeskeygenassist_si128(expKey[0], 0x01);
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addKey(1, expKey, expSource);
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expSource = _mm_aeskeygenassist_si128(expKey[1], 0x02);
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addKey(2, expKey, expSource);
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expSource = _mm_aeskeygenassist_si128(expKey[2], 0x04);
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addKey(3, expKey, expSource);
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expSource = _mm_aeskeygenassist_si128(expKey[3], 0x08);
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addKey(4, expKey, expSource);
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expSource = _mm_aeskeygenassist_si128(expKey[4], 0x10);
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addKey(5, expKey, expSource);
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expSource = _mm_aeskeygenassist_si128(expKey[5], 0x20);
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addKey(6, expKey, expSource);
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expSource = _mm_aeskeygenassist_si128(expKey[6], 0x40);
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addKey(7, expKey, expSource);
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expSource = _mm_aeskeygenassist_si128(expKey[7], 0x80);
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addKey(8, expKey, expSource);
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expSource = _mm_aeskeygenassist_si128(expKey[8], 0x1B);
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addKey(9, expKey, expSource);
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expSource = _mm_aeskeygenassist_si128(expKey[9], 0x36);
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addKey(10, expKey, expSource);
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}
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void aes(__m128i *value, __m128i key)
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{
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//... Initialize ...
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__m128i expKey[11];
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__m128i tmp = _mm_load_si128(value);
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expandKey(key, expKey);
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tmp = _mm_xor_si128(tmp, expKey[0]);
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tmp = _mm_aesenc_si128(tmp, expKey[1]);
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tmp = _mm_aesenc_si128(tmp, expKey[2]);
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tmp = _mm_aesenc_si128(tmp, expKey[3]);
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tmp = _mm_aesenc_si128(tmp, expKey[4]);
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tmp = _mm_aesenc_si128(tmp, expKey[5]);
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tmp = _mm_aesenc_si128(tmp, expKey[6]);
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tmp = _mm_aesenc_si128(tmp, expKey[7]);
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tmp = _mm_aesenc_si128(tmp, expKey[8]);
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tmp = _mm_aesenc_si128(tmp, expKey[9]);
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tmp = _mm_aesenclast_si128(tmp, expKey[10]);
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_mm_storeu_si128(value, tmp);
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}
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//****************************
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// MAIN function: AES testing
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//****************************
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int main(int argc, char* argv[])
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{
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uint32_t cycles = 1000000;
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__m128i key = _mm_setr_epi8(0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff);
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__m128i value = _mm_setr_epi8(0xab, 0xcd, 0xef, 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0x01, 0x23, 0x45, 0x67, 0x89);
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if (argc > 2) {
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std::cerr << "Invalid number of arguments\n";
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exit(EXIT_FAILURE);
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} else if (argc == 2) {
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cycles = std::atoi(argv[1]);
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}
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const auto start{std::chrono::steady_clock::now()};
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{
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for (int i = 0; i < cycles; i++) {
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aes(&value, key);
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}
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}
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const auto end{std::chrono::steady_clock::now()};
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const std::chrono::duration<double> elapsed_seconds{end - start};
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auto milliseconds = std::chrono::duration_cast<std::chrono::milliseconds>(elapsed_seconds).count();
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std::cout << "AES (" << cycles << " runs)\nElapsed time: ";
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std::cout << milliseconds << "ms\n"; // Before C++20
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exit(value[0]);
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}
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