AES optimization rabbit hole

This commit is contained in:
Adam Ierymenko 2019-09-13 09:35:49 -07:00
parent 2d1eeda188
commit 87fe69c27c
No known key found for this signature in database
GPG key ID: C8877CF2D7A5D7F3
5 changed files with 215 additions and 134 deletions

View file

@ -372,121 +372,4 @@ void AES::_gmacSW(const uint8_t iv[12],const uint8_t *in,unsigned int len,uint8_
#endif
}
#ifdef ZT_AES_AESNI
void AES::_crypt_ctr_aesni(const uint8_t iv[16],const uint8_t *in,unsigned int len,uint8_t *out) const
{
__m128i ctr0,ctr1,ctr2,ctr3,ctr4,ctr5,ctr6,ctr7;
__m128i swap128 = _mm_set_epi8(0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15);
ctr0 = _mm_shuffle_epi8(_mm_loadu_si128((__m128i *)iv),swap128);
ctr1 = _mm_shuffle_epi8(_mm_add_epi64(ctr0,_mm_set_epi64x((long long)((~((uint64_t)_mm_extract_epi64(ctr0,0))) < 1ULL),1LL)),swap128);
ctr2 = _mm_shuffle_epi8(_mm_add_epi64(ctr0,_mm_set_epi64x((long long)((~((uint64_t)_mm_extract_epi64(ctr0,0))) < 2ULL),2LL)),swap128);
ctr3 = _mm_shuffle_epi8(_mm_add_epi64(ctr0,_mm_set_epi64x((long long)((~((uint64_t)_mm_extract_epi64(ctr0,0))) < 3ULL),3LL)),swap128);
ctr4 = _mm_shuffle_epi8(_mm_add_epi64(ctr0,_mm_set_epi64x((long long)((~((uint64_t)_mm_extract_epi64(ctr0,0))) < 4ULL),4LL)),swap128);
ctr5 = _mm_shuffle_epi8(_mm_add_epi64(ctr0,_mm_set_epi64x((long long)((~((uint64_t)_mm_extract_epi64(ctr0,0))) < 5ULL),5LL)),swap128);
ctr6 = _mm_shuffle_epi8(_mm_add_epi64(ctr0,_mm_set_epi64x((long long)((~((uint64_t)_mm_extract_epi64(ctr0,0))) < 6ULL),6LL)),swap128);
ctr7 = _mm_shuffle_epi8(_mm_add_epi64(ctr0,_mm_set_epi64x((long long)((~((uint64_t)_mm_extract_epi64(ctr0,0))) < 7ULL),7LL)),swap128);
ctr0 = _mm_shuffle_epi8(ctr0,swap128);
uint64_t ctr = 8;
#define ZT_AES_CTR_AESNI_ROUND(k) \
c0 = _mm_aesenc_si128(c0,k); \
c1 = _mm_aesenc_si128(c1,k); \
c2 = _mm_aesenc_si128(c2,k); \
c3 = _mm_aesenc_si128(c3,k); \
c4 = _mm_aesenc_si128(c4,k); \
c5 = _mm_aesenc_si128(c5,k); \
c6 = _mm_aesenc_si128(c6,k); \
c7 = _mm_aesenc_si128(c7,k)
while (len >= 128) {
__m128i c0 = _mm_xor_si128(ctr0,_k.ni.k[0]);
ctr0 = _mm_shuffle_epi8(ctr0,swap128);
__m128i c1 = _mm_xor_si128(ctr1,_k.ni.k[0]);
ctr1 = _mm_shuffle_epi8(_mm_add_epi64(ctr0,_mm_set_epi64x((long long)((~((uint64_t)_mm_extract_epi64(ctr0,0))) < (ctr + 1ULL)),(long long)(ctr + 1ULL))),swap128);
__m128i c2 = _mm_xor_si128(ctr2,_k.ni.k[0]);
ctr2 = _mm_shuffle_epi8(_mm_add_epi64(ctr0,_mm_set_epi64x((long long)((~((uint64_t)_mm_extract_epi64(ctr0,0))) < (ctr + 2ULL)),(long long)(ctr + 2ULL))),swap128);
__m128i c3 = _mm_xor_si128(ctr3,_k.ni.k[0]);
ctr3 = _mm_shuffle_epi8(_mm_add_epi64(ctr0,_mm_set_epi64x((long long)((~((uint64_t)_mm_extract_epi64(ctr0,0))) < (ctr + 3ULL)),(long long)(ctr + 3ULL))),swap128);
__m128i c4 = _mm_xor_si128(ctr4,_k.ni.k[0]);
ctr4 = _mm_shuffle_epi8(_mm_add_epi64(ctr0,_mm_set_epi64x((long long)((~((uint64_t)_mm_extract_epi64(ctr0,0))) < (ctr + 4ULL)),(long long)(ctr + 4ULL))),swap128);
__m128i c5 = _mm_xor_si128(ctr5,_k.ni.k[0]);
ctr5 = _mm_shuffle_epi8(_mm_add_epi64(ctr0,_mm_set_epi64x((long long)((~((uint64_t)_mm_extract_epi64(ctr0,0))) < (ctr + 5ULL)),(long long)(ctr + 5ULL))),swap128);
__m128i c6 = _mm_xor_si128(ctr6,_k.ni.k[0]);
ctr6 = _mm_shuffle_epi8(_mm_add_epi64(ctr0,_mm_set_epi64x((long long)((~((uint64_t)_mm_extract_epi64(ctr0,0))) < (ctr + 6ULL)),(long long)(ctr + 6ULL))),swap128);
__m128i c7 = _mm_xor_si128(ctr7,_k.ni.k[0]);
ctr7 = _mm_shuffle_epi8(_mm_add_epi64(ctr0,_mm_set_epi64x((long long)((~((uint64_t)_mm_extract_epi64(ctr0,0))) < (ctr + 7ULL)),(long long)(ctr + 7ULL))),swap128);
ctr0 = _mm_shuffle_epi8(_mm_add_epi64(ctr0,_mm_set_epi64x((long long)((~((uint64_t)_mm_extract_epi64(ctr0,0))) < (ctr)),(long long)(ctr))),swap128);
ctr += 8;
ZT_AES_CTR_AESNI_ROUND(_k.ni.k[3]);
ZT_AES_CTR_AESNI_ROUND(_k.ni.k[4]);
ZT_AES_CTR_AESNI_ROUND(_k.ni.k[5]);
ZT_AES_CTR_AESNI_ROUND(_k.ni.k[6]);
ZT_AES_CTR_AESNI_ROUND(_k.ni.k[7]);
ZT_AES_CTR_AESNI_ROUND(_k.ni.k[8]);
ZT_AES_CTR_AESNI_ROUND(_k.ni.k[9]);
ZT_AES_CTR_AESNI_ROUND(_k.ni.k[10]);
ZT_AES_CTR_AESNI_ROUND(_k.ni.k[11]);
ZT_AES_CTR_AESNI_ROUND(_k.ni.k[12]);
ZT_AES_CTR_AESNI_ROUND(_k.ni.k[13]);
_mm_storeu_si128((__m128i *)out,_mm_xor_si128(_mm_loadu_si128((const __m128i *)in),_mm_aesenclast_si128(c0,_k.ni.k[14])));
_mm_storeu_si128((__m128i *)(out + 16),_mm_xor_si128(_mm_loadu_si128((const __m128i *)(in + 16)),_mm_aesenclast_si128(c1,_k.ni.k[14])));
_mm_storeu_si128((__m128i *)(out + 32),_mm_xor_si128(_mm_loadu_si128((const __m128i *)(in + 32)),_mm_aesenclast_si128(c2,_k.ni.k[14])));
_mm_storeu_si128((__m128i *)(out + 48),_mm_xor_si128(_mm_loadu_si128((const __m128i *)(in + 48)),_mm_aesenclast_si128(c3,_k.ni.k[14])));
_mm_storeu_si128((__m128i *)(out + 64),_mm_xor_si128(_mm_loadu_si128((const __m128i *)(in + 64)),_mm_aesenclast_si128(c4,_k.ni.k[14])));
_mm_storeu_si128((__m128i *)(out + 80),_mm_xor_si128(_mm_loadu_si128((const __m128i *)(in + 80)),_mm_aesenclast_si128(c5,_k.ni.k[14])));
_mm_storeu_si128((__m128i *)(out + 96),_mm_xor_si128(_mm_loadu_si128((const __m128i *)(in + 96)),_mm_aesenclast_si128(c6,_k.ni.k[14])));
_mm_storeu_si128((__m128i *)(out + 112),_mm_xor_si128(_mm_loadu_si128((const __m128i *)(in + 112)),_mm_aesenclast_si128(c7,_k.ni.k[14])));
in += 128;
out += 128;
len -= 128;
}
#undef ZT_AES_CTR_AESNI_ROUND
while (len >= 16) {
__m128i c0 = _mm_xor_si128(ctr0,_k.ni.k[0]);
ctr0 = _mm_shuffle_epi8(ctr0,swap128);
ctr0 = _mm_shuffle_epi8(_mm_add_epi64(ctr0,_mm_set_epi64x((long long)((~((uint64_t)_mm_extract_epi64(ctr0,0))) < (ctr)),(long long)(ctr))),swap128);
++ctr;
c0 = _mm_aesenc_si128(c0,_k.ni.k[1]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[2]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[3]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[4]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[5]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[6]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[7]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[8]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[9]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[10]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[11]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[12]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[13]);
_mm_storeu_si128((__m128i *)out,_mm_xor_si128(_mm_loadu_si128((const __m128i *)in),_mm_aesenclast_si128(c0,_k.ni.k[14])));
in += 16;
out += 16;
len -= 16;
}
if (len) {
__m128i c0 = _mm_xor_si128(ctr0,_k.ni.k[0]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[1]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[2]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[3]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[4]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[5]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[6]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[7]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[8]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[9]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[10]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[11]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[12]);
c0 = _mm_aesenc_si128(c0,_k.ni.k[13]);
c0 = _mm_aesenclast_si128(c0,_k.ni.k[14]);
for(unsigned int i=0;i<len;++i)
out[i] = in[i] ^ ((const uint8_t *)&c0)[i];
}
}
#endif // ZT_AES_AESNI
} // namespace ZeroTier