54 lines
2.1 KiB
C++
54 lines
2.1 KiB
C++
#include <stdio.h>
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#include <stdint.h>
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#include <immintrin.h>
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/*
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Author: Ondrej Hladuvka, hladuond@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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namespace aes128_6 {
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static inline __m128i expandRoundKey(__m128i key, __m128i keygened){
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keygened = _mm_shuffle_epi32(keygened, _MM_SHUFFLE(3,3,3,3));
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key = _mm_xor_si128(key, _mm_slli_si128(key, 4));
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key = _mm_xor_si128(key, _mm_slli_si128(key, 4));
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key = _mm_xor_si128(key, _mm_slli_si128(key, 4));
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return _mm_xor_si128(key, keygened);
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}
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void expandKey(uint8_t *key, __m128i *ex){
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ex[0] = _mm_loadu_si128((const __m128i*) key);
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ex[1] = expandRoundKey(ex[0], _mm_aeskeygenassist_si128(ex[0], 0x01));
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ex[2] = expandRoundKey(ex[1], _mm_aeskeygenassist_si128(ex[1], 0x02));
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ex[3] = expandRoundKey(ex[2], _mm_aeskeygenassist_si128(ex[2], 0x04));
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ex[4] = expandRoundKey(ex[3], _mm_aeskeygenassist_si128(ex[3], 0x08));
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ex[5] = expandRoundKey(ex[4], _mm_aeskeygenassist_si128(ex[4], 0x10));
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ex[6] = expandRoundKey(ex[5], _mm_aeskeygenassist_si128(ex[5], 0x20));
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ex[7] = expandRoundKey(ex[6], _mm_aeskeygenassist_si128(ex[6], 0x40));
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ex[8] = expandRoundKey(ex[7], _mm_aeskeygenassist_si128(ex[7], 0x80));
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ex[9] = expandRoundKey(ex[8], _mm_aeskeygenassist_si128(ex[8], 0x1B));
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ex[10] = expandRoundKey(ex[9], _mm_aeskeygenassist_si128(ex[9], 0x36));
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}
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void aes128_6(uint8_t *in, uint8_t *out, uint32_t* key) {
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__m128i *k = (__m128i *)key;
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__m128i state = _mm_loadu_si128((__m128i *) in);
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state = _mm_xor_si128 (state, k[ 0]);
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state = _mm_aesenc_si128 (state, k[ 1]);
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state = _mm_aesenc_si128 (state, k[ 2]);
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state = _mm_aesenc_si128 (state, k[ 3]);
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state = _mm_aesenc_si128 (state, k[ 4]);
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state = _mm_aesenc_si128 (state, k[ 5]);
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state = _mm_aesenc_si128 (state, k[ 6]);
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state = _mm_aesenc_si128 (state, k[ 7]);
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state = _mm_aesenc_si128 (state, k[ 8]);
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state = _mm_aesenc_si128 (state, k[ 9]);
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state = _mm_aesenclast_si128(state, k[10]);
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_mm_storeu_si128((__m128i *) out, state);
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}
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} |