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/* g13-common.c - Common code for G13 modules
* Copyright (C) 2009, 2015 Werner Koch
*
* 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 3 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, see <https://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <errno.h>
#include <assert.h>
#include "g13-common.h"
#include <gcrypt.h>
#include <assuan.h>
#include "../common/i18n.h"
#include "../common/sysutils.h"
/* Global variable to keep an error count. */
int g13_errors_seen = 0;
/* Note: This function is used by signal handlers!. */
static void
emergency_cleanup (void)
{
gcry_control (GCRYCTL_TERM_SECMEM);
}
/* Wrapper around gnupg_init_signals. */
void
g13_init_signals (void)
{
gnupg_init_signals (0, emergency_cleanup);
}
/* Install a regular exit handler to make real sure that the secure
memory gets wiped out. */
void
g13_install_emergency_cleanup (void)
{
if (atexit (emergency_cleanup))
{
log_error ("atexit failed\n");
g13_exit (2);
}
}
/* Use this function instead of exit() in all g13 modules. */
void
g13_exit (int rc)
{
gcry_control (GCRYCTL_UPDATE_RANDOM_SEED_FILE);
if (opt.debug & DBG_MEMSTAT_VALUE)
{
gcry_control( GCRYCTL_DUMP_MEMORY_STATS );
gcry_control( GCRYCTL_DUMP_RANDOM_STATS );
}
if (opt.debug)
gcry_control (GCRYCTL_DUMP_SECMEM_STATS );
emergency_cleanup ();
rc = rc? rc : log_get_errorcount(0)? 2 : g13_errors_seen? 1 : 0;
exit (rc);
}
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