mirror of
git://git.gnupg.org/gnupg.git
synced 2024-12-22 10:19:57 +01:00
190 lines
3.9 KiB
C
190 lines
3.9 KiB
C
/* misc.c - miscellaneous functions
|
|
* Copyright (C) 1998 Free Software Foundation, Inc.
|
|
*
|
|
* This file is part of GNUPG.
|
|
*
|
|
* GNUPG 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.
|
|
*
|
|
* GNUPG 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 this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#if defined(__linux__) && defined(__alpha__)
|
|
#include <asm/sysinfo.h>
|
|
#include <asm/unistd.h>
|
|
#endif
|
|
#ifdef HAVE_SETRLIMIT
|
|
#include <sys/time.h>
|
|
#include <sys/resource.h>
|
|
#endif
|
|
#include "util.h"
|
|
#include "main.h"
|
|
#include "options.h"
|
|
#include "i18n.h"
|
|
|
|
|
|
const char *g10m_revision_string(int);
|
|
const char *g10c_revision_string(int);
|
|
const char *g10u_revision_string(int);
|
|
|
|
volatile void
|
|
pull_in_libs(void)
|
|
{
|
|
g10m_revision_string(0);
|
|
g10c_revision_string(0);
|
|
g10u_revision_string(0);
|
|
}
|
|
|
|
|
|
#if defined(__linux__) && defined(__alpha__)
|
|
#warning using trap_unaligned
|
|
static int
|
|
setsysinfo(unsigned long op, void *buffer, unsigned long size,
|
|
int *start, void *arg, unsigned long flag)
|
|
{
|
|
return syscall(__NR_osf_setsysinfo, op, buffer, size, start, arg, flag);
|
|
}
|
|
|
|
void
|
|
trap_unaligned(void)
|
|
{
|
|
unsigned int buf[2];
|
|
|
|
buf[0] = SSIN_UACPROC;
|
|
buf[1] = UAC_SIGBUS | UAC_NOPRINT;
|
|
setsysinfo(SSI_NVPAIRS, buf, 1, 0, 0, 0);
|
|
}
|
|
#else
|
|
void
|
|
trap_unaligned(void)
|
|
{ /* dummy */
|
|
}
|
|
#endif
|
|
|
|
|
|
void
|
|
disable_core_dumps()
|
|
{
|
|
#ifdef HAVE_SETRLIMIT
|
|
struct rlimit limit;
|
|
|
|
limit.rlim_cur = 0;
|
|
limit.rlim_max = 0;
|
|
if( setrlimit( RLIMIT_CORE, &limit ) )
|
|
log_fatal(_("can't disable core dumps: %s\n"), strerror(errno) );
|
|
#else
|
|
log_info(_("WARNING: Program may create a core file!\n"));
|
|
#endif
|
|
}
|
|
|
|
|
|
|
|
u16
|
|
checksum_u16( unsigned n )
|
|
{
|
|
u16 a;
|
|
|
|
a = (n >> 8) & 0xff;
|
|
if( opt.emulate_bugs & EMUBUG_GPGCHKSUM ) {
|
|
a |= n & 0xff;
|
|
log_debug("csum_u16 emulated for n=%u\n", n);
|
|
}
|
|
else
|
|
a += n & 0xff;
|
|
return a;
|
|
}
|
|
|
|
static u16
|
|
checksum_u16_nobug( unsigned n )
|
|
{
|
|
u16 a;
|
|
|
|
a = (n >> 8) & 0xff;
|
|
a += n & 0xff;
|
|
return a;
|
|
}
|
|
|
|
u16
|
|
checksum( byte *p, unsigned n )
|
|
{
|
|
u16 a;
|
|
|
|
for(a=0; n; n-- )
|
|
a += *p++;
|
|
return a;
|
|
}
|
|
|
|
u16
|
|
checksum_mpi( MPI a )
|
|
{
|
|
u16 csum;
|
|
byte *buffer;
|
|
unsigned nbytes;
|
|
unsigned nbits;
|
|
|
|
buffer = mpi_get_buffer( a, &nbytes, NULL );
|
|
/* some versions of gpg encode wrong values for the length of an mpi
|
|
* so that mpi_get_nbits() which counts the mpi yields another (shorter)
|
|
* value than the one store with the mpi. mpi_get_nbit_info() returns
|
|
* this stored value if it is still available.
|
|
*/
|
|
|
|
if( opt.emulate_bugs & EMUBUG_GPGCHKSUM )
|
|
nbits = 0;
|
|
else
|
|
nbits = mpi_get_nbit_info(a);
|
|
if( !nbits )
|
|
nbits = mpi_get_nbits(a);
|
|
csum = checksum_u16( nbits );
|
|
csum += checksum( buffer, nbytes );
|
|
m_free( buffer );
|
|
return csum;
|
|
}
|
|
|
|
/****************
|
|
* This is the correct function
|
|
*/
|
|
u16
|
|
checksum_mpi_counted_nbits( MPI a )
|
|
{
|
|
u16 csum;
|
|
byte *buffer;
|
|
unsigned nbytes;
|
|
unsigned nbits;
|
|
|
|
buffer = mpi_get_buffer( a, &nbytes, NULL );
|
|
nbits = mpi_get_nbits(a);
|
|
mpi_set_nbit_info(a,nbits);
|
|
csum = checksum_u16_nobug( nbits );
|
|
csum += checksum( buffer, nbytes );
|
|
m_free( buffer );
|
|
return csum;
|
|
}
|
|
|
|
|
|
u32
|
|
buffer_to_u32( const byte *buffer )
|
|
{
|
|
unsigned long a;
|
|
a = *buffer << 24;
|
|
a |= buffer[1] << 16;
|
|
a |= buffer[2] << 8;
|
|
a |= buffer[3];
|
|
return a;
|
|
}
|
|
|