void
aesni_decrypt_cbc(int rounds, const void *key_schedule, size_t len,
uint8_t *buf, const uint8_t iv[AES_BLOCK_LEN])
{
__m128i blocks[8];
struct blocks8 *blks;
__m128i ivreg, nextiv;
size_t i, j, cnt;
ivreg = _mm_loadu_si128((const __m128i *)iv);
cnt = len / AES_BLOCK_LEN / 8;
for (i = 0; i < cnt; i++) {
blks = (struct blocks8 *)buf;
aesni_dec8(rounds - 1, key_schedule, blks->blk[0], blks->blk[1],
blks->blk[2], blks->blk[3], blks->blk[4], blks->blk[5],
blks->blk[6], blks->blk[7], &blocks[0]);
for (j = 0; j < 8; j++) {
nextiv = blks->blk[j];
blks->blk[j] = blocks[j] ^ ivreg;
ivreg = nextiv;
}
buf += AES_BLOCK_LEN * 8;
}
i *= 8;
cnt = len / AES_BLOCK_LEN;
for (; i < cnt; i++) {
nextiv = _mm_loadu_si128((void *)buf);
_mm_storeu_si128((void *)buf,
aesni_dec(rounds - 1, key_schedule, nextiv) ^ ivreg);
ivreg = nextiv;
buf += AES_BLOCK_LEN;
}
}
void
aesni_decrypt_cbc(int rounds, const void *key_schedule, size_t len,
uint8_t *buf, const uint8_t iv[AES_BLOCK_LEN])
{
__m128i blocks[8];
__m128i *bufs;
__m128i ivreg, nextiv;
size_t i, j, cnt;
ivreg = _mm_loadu_si128((const __m128i *)iv);
cnt = len / AES_BLOCK_LEN / 8;
for (i = 0; i < cnt; i++) {
bufs = (__m128i *)buf;
aesni_dec8(rounds - 1, key_schedule, bufs[0], bufs[1],
bufs[2], bufs[3], bufs[4], bufs[5], bufs[6],
bufs[7], &blocks[0]);
for (j = 0; j < 8; j++) {
nextiv = bufs[j];
bufs[j] = blocks[j] ^ ivreg;
ivreg = nextiv;
}
buf += AES_BLOCK_LEN * 8;
}
i *= 8;
cnt = len / AES_BLOCK_LEN;
for (; i < cnt; i++) {
bufs = (__m128i *)buf;
nextiv = bufs[0];
bufs[0] = aesni_dec(rounds - 1, key_schedule, bufs[0]) ^ ivreg;
ivreg = nextiv;
buf += AES_BLOCK_LEN;
}
}
void
aesni_decrypt_ecb(int rounds, const void *key_schedule, size_t len,
const uint8_t from[AES_BLOCK_LEN], uint8_t to[AES_BLOCK_LEN])
{
__m128i tot;
const __m128i *blocks;
size_t i, cnt;
cnt = len / AES_BLOCK_LEN / 8;
for (i = 0; i < cnt; i++) {
blocks = (const __m128i *)from;
aesni_dec8(rounds - 1, key_schedule, blocks[0], blocks[1],
blocks[2], blocks[3], blocks[4], blocks[5], blocks[6],
blocks[7], (__m128i *)to);
from += AES_BLOCK_LEN * 8;
to += AES_BLOCK_LEN * 8;
}
i *= 8;
cnt = len / AES_BLOCK_LEN;
for (; i < cnt; i++) {
tot = aesni_dec(rounds - 1, key_schedule,
_mm_loadu_si128((const __m128i *)from));
_mm_storeu_si128((__m128i *)to, tot);
from += AES_BLOCK_LEN;
to += AES_BLOCK_LEN;
}
}
static void
aesni_crypt_xts_block8(int rounds, const __m128i *key_schedule, __m128i *tweak,
const uint8_t *from, uint8_t *to, int do_encrypt)
{
__m128i tmptweak;
__m128i a, b, c, d, e, f, g, h;
__m128i tweaks[8];
__m128i tmp[8];
__m128i *top;
const __m128i *fromp;
tmptweak = *tweak;
/*
* unroll the loop. This lets gcc put values directly in the
* register and saves memory accesses.
*/
fromp = (const __m128i *)from;
#define PREPINP(v, pos) \
do { \
tweaks[(pos)] = tmptweak; \
(v) = _mm_loadu_si128(&fromp[pos]) ^ \
tmptweak; \
tmptweak = xts_crank_lfsr(tmptweak); \
} while (0)
PREPINP(a, 0);
PREPINP(b, 1);
PREPINP(c, 2);
PREPINP(d, 3);
PREPINP(e, 4);
PREPINP(f, 5);
PREPINP(g, 6);
PREPINP(h, 7);
*tweak = tmptweak;
if (do_encrypt)
aesni_enc8(rounds - 1, key_schedule, a, b, c, d, e, f, g, h,
tmp);
else
aesni_dec8(rounds - 1, key_schedule, a, b, c, d, e, f, g, h,
tmp);
top = (__m128i *)to;
_mm_storeu_si128(&top[0], tmp[0] ^ tweaks[0]);
_mm_storeu_si128(&top[1], tmp[1] ^ tweaks[1]);
_mm_storeu_si128(&top[2], tmp[2] ^ tweaks[2]);
_mm_storeu_si128(&top[3], tmp[3] ^ tweaks[3]);
_mm_storeu_si128(&top[4], tmp[4] ^ tweaks[4]);
_mm_storeu_si128(&top[5], tmp[5] ^ tweaks[5]);
_mm_storeu_si128(&top[6], tmp[6] ^ tweaks[6]);
_mm_storeu_si128(&top[7], tmp[7] ^ tweaks[7]);
}
static void
aesni_crypt_xts_block8(int rounds, const void *key_schedule, __m128i *tweak,
const __m128i *from, __m128i *to, int do_encrypt)
{
__m128i tmptweak;
__m128i a, b, c, d, e, f, g, h;
__m128i tweaks[8];
__m128i tmp[8];
tmptweak = *tweak;
/*
* unroll the loop. This lets gcc put values directly in the
* register and saves memory accesses.
*/
#define PREPINP(v, pos) \
do { \
tweaks[(pos)] = tmptweak; \
(v) = from[(pos)] ^ tmptweak; \
tmptweak = xts_crank_lfsr(tmptweak); \
} while (0)
PREPINP(a, 0);
PREPINP(b, 1);
PREPINP(c, 2);
PREPINP(d, 3);
PREPINP(e, 4);
PREPINP(f, 5);
PREPINP(g, 6);
PREPINP(h, 7);
*tweak = tmptweak;
if (do_encrypt)
aesni_enc8(rounds - 1, key_schedule, a, b, c, d, e, f, g, h,
tmp);
else
aesni_dec8(rounds - 1, key_schedule, a, b, c, d, e, f, g, h,
tmp);
to[0] = tmp[0] ^ tweaks[0];
to[1] = tmp[1] ^ tweaks[1];
to[2] = tmp[2] ^ tweaks[2];
to[3] = tmp[3] ^ tweaks[3];
to[4] = tmp[4] ^ tweaks[4];
to[5] = tmp[5] ^ tweaks[5];
to[6] = tmp[6] ^ tweaks[6];
to[7] = tmp[7] ^ tweaks[7];
}
void
aesni_decrypt_ecb(int rounds, const void *key_schedule, size_t len,
const uint8_t from[AES_BLOCK_LEN], uint8_t to[AES_BLOCK_LEN])
{
__m128i tot;
__m128i tout[8];
const struct blocks8 *blks;
struct blocks8 *top;
size_t i, cnt;
cnt = len / AES_BLOCK_LEN / 8;
for (i = 0; i < cnt; i++) {
blks = (const struct blocks8 *)from;
top = (struct blocks8 *)to;
aesni_dec8(rounds - 1, key_schedule, blks->blk[0], blks->blk[1],
blks->blk[2], blks->blk[3], blks->blk[4], blks->blk[5],
blks->blk[6], blks->blk[7], tout);
top->blk[0] = tout[0];
top->blk[1] = tout[1];
top->blk[2] = tout[2];
top->blk[3] = tout[3];
top->blk[4] = tout[4];
top->blk[5] = tout[5];
top->blk[6] = tout[6];
top->blk[7] = tout[7];
from += AES_BLOCK_LEN * 8;
to += AES_BLOCK_LEN * 8;
}
i *= 8;
cnt = len / AES_BLOCK_LEN;
for (; i < cnt; i++) {
tot = aesni_dec(rounds - 1, key_schedule,
_mm_loadu_si128((const __m128i *)from));
_mm_storeu_si128((__m128i *)to, tot);
from += AES_BLOCK_LEN;
to += AES_BLOCK_LEN;
}
}
