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