/*
This file is part of libdvbcsa.
libdvbcsa is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
libdvbcsa is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with libdvbcsa; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA
Based on FFdecsa, Copyright (C) 2003-2004 fatih89r
(c) 2006-2008 Alexandre Becoulet <alexandre.becoulet@free.fr>
*/
#if defined(DVBCSA_DEBUG)
#include <stdio.h>
#endif
#include "dvbcsa/dvbcsa.h"
#include "dvbcsa_bs.h"
#ifdef HAVE_MM_MALLOC
# include <mm_malloc.h>
#endif
#ifdef HAVE_ASSERT_H
#include <assert.h>
#endif
void dvbcsa_bs_decrypt(const struct dvbcsa_bs_key_s *key,
const struct dvbcsa_bs_batch_s *pcks,
unsigned int maxlen)
{
#ifdef HAVE_ASSERT_H
assert(maxlen % 8 == 0);
#endif
#ifndef DVBCSA_DISABLE_STREAM
dvbcsa_bs_stream_cipher_batch(key, pcks, maxlen);
#endif
#ifndef DVBCSA_DISABLE_BLOCK
dvbcsa_bs_block_decrypt_batch(key, pcks, maxlen);
#endif
BS_EMPTY (); // restore CPU multimedia state
}
void dvbcsa_bs_encrypt(const struct dvbcsa_bs_key_s *key,
const struct dvbcsa_bs_batch_s *pcks,
unsigned int maxlen)
{
#ifdef HAVE_ASSERT_H
assert(maxlen % 8 == 0);
#endif
#ifndef DVBCSA_DISABLE_BLOCK
dvbcsa_bs_block_encrypt_batch(key, pcks, maxlen);
#endif
#ifndef DVBCSA_DISABLE_STREAM
dvbcsa_bs_stream_cipher_batch(key, pcks, maxlen);
#endif
BS_EMPTY (); // restore CPU multimedia state
}
struct dvbcsa_bs_key_s * dvbcsa_bs_key_alloc()
{
void *p;
#if defined(HAVE_MM_MALLOC)
p = _mm_malloc(sizeof (struct dvbcsa_bs_key_s), sizeof(dvbcsa_bs_word_t));
#elif defined(HAVE_POSIX_MEMALIGN)
p = posix_memalign(&p, sizeof(dvbcsa_bs_word_t) > sizeof(void *)
? sizeof(dvbcsa_bs_word_t) : sizeof(void *),
sizeof (struct dvbcsa_bs_key_s)) ? NULL : p;
#else
p = malloc(sizeof (struct dvbcsa_bs_key_s));
# warning Using malloc instead of posix_memalign may raise alignment issues
# ifdef HAVE_ASSERT_H
assert((uintptr_t)p % sizeof(dvbcsa_bs_word_t) == 0);
# endif
#endif
return p;
}
void dvbcsa_bs_key_free(struct dvbcsa_bs_key_s *key)
{
#ifdef HAVE_MM_MALLOC
_mm_free(key);
#else
free(key);
#endif
}
unsigned int dvbcsa_bs_batch_size (void)
{
return BS_BATCH_SIZE;
}
#if defined(DVBCSA_DEBUG)
void
worddump (const char *str, const void *data, size_t len, size_t ws)
{
const uint8_t *p = data;
uint32_t i;
printf ("- %s - %zu bytes\n", str, len);
for (i = 0; i < len; i++)
{
const char *s;
if ((i + 1) % 32 == 0)
s = "\n";
else if ((i + 1) % ws == 0)
s = " ";
else
s = "";
printf("%02x%s", p[i ^ (ws - 1)], s);
}
if (i % 32)
putchar ('\n');
}
#endif