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/*
* Copyright (c) 2012 Vincent Hanquez <vincent@snarc.org>
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of his contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef BLOCK128_H
#define BLOCK128_H
#include <cryptonite_bitfn.h>
#include <cryptonite_align.h>
typedef union {
uint64_t q[2];
uint32_t d[4];
uint16_t w[8];
uint8_t b[16];
} block128;
static inline void block128_copy_bytes(block128 *block, const uint8_t *src, uint32_t len)
{
int i;
for (i = 0; i < len; i++) block->b[i] = src[i];
}
static inline void block128_copy_aligned(block128 *d, const block128 *s)
{
d->q[0] = s->q[0]; d->q[1] = s->q[1];
}
static inline void block128_copy(block128 *d, const block128 *s)
{
if (need_alignment(d, 8) || need_alignment(s, 8)) {
block128_copy_bytes(d, (const uint8_t *) s, 16);
} else {
block128_copy_aligned(d, s);
}
}
static inline void block128_zero(block128 *d)
{
d->q[0] = 0; d->q[1] = 0;
}
static inline void block128_xor_bytes(block128 *block, const uint8_t *src, uint32_t len)
{
int i;
for (i = 0; i < len; i++) block->b[i] ^= src[i];
}
static inline void block128_xor_aligned(block128 *d, const block128 *s)
{
d->q[0] ^= s->q[0];
d->q[1] ^= s->q[1];
}
static inline void block128_xor(block128 *d, const block128 *s)
{
if (need_alignment(d, 8) || need_alignment(s, 8)) {
block128_xor_bytes(d, (const uint8_t *) s, 16);
} else {
block128_xor_aligned(d, s);
}
}
static inline void block128_vxor_bytes(block128 *block, const uint8_t *src1, const uint8_t *src2, uint32_t len)
{
int i;
for (i = 0; i < len; i++) block->b[i] = src1[i] ^ src2[i];
}
static inline void block128_vxor_aligned(block128 *d, const block128 *s1, const block128 *s2)
{
d->q[0] = s1->q[0] ^ s2->q[0];
d->q[1] = s1->q[1] ^ s2->q[1];
}
static inline void block128_vxor(block128 *d, const block128 *s1, const block128 *s2)
{
if (need_alignment(d, 8) || need_alignment(s1, 8) || need_alignment(s2, 8)) {
block128_vxor_bytes(d, (const uint8_t *) s1, (const uint8_t *) s2, 16);
} else {
block128_vxor_aligned(d, s1, s2);
}
}
static inline void block128_inc_be(block128 *b)
{
uint64_t v = be64_to_cpu(b->q[1]);
if (++v == 0) {
b->q[0] = cpu_to_be64(be64_to_cpu(b->q[0]) + 1);
b->q[1] = 0;
} else
b->q[1] = cpu_to_be64(v);
}
#ifdef IMPL_DEBUG
#include <stdio.h>
static inline void block128_print(block128 *b)
{
int i;
for (i = 0; i < 16; i++) {
printf("%02x ", b->b[i]);
}
printf("\n");
}
#endif
#endif
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