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preset-passphrase.c
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/* preset-passphrase.c - A tool to preset a passphrase.
* Copyright (C) 2004 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 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 <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <sys/stat.h>
#include <unistd.h>
#ifdef HAVE_LOCALE_H
#include <locale.h>
#endif
#ifdef HAVE_LANGINFO_CODESET
#include <langinfo.h>
#endif
#ifdef HAVE_DOSISH_SYSTEM
#include <fcntl.h> /* for setmode() */
#endif
#ifdef HAVE_W32_SYSTEM
#include <windows.h> /* To initialize the sockets. fixme */
#endif
#define JNLIB_NEED_LOG_LOGV
#include "agent.h"
#include "minip12.h"
#include "simple-pwquery.h"
#include "i18n.h"
#include "sysutils.h"
enum cmd_and_opt_values
{ aNull = 0,
oVerbose = 'v',
oPassphrase = 'P',
oPreset = 'c',
oForget = 'f',
oNoVerbose = 500,
oHomedir,
aTest };
static const char *opt_homedir;
static const char *opt_passphrase;
static ARGPARSE_OPTS opts[] = {
{ 301, NULL, 0, N_("@Options:\n ") },
{ oVerbose, "verbose", 0, "verbose" },
{ oPassphrase, "passphrase", 2, "|STRING|use passphrase STRING" },
{ oPreset, "preset", 256, "preset passphrase"},
{ oForget, "forget", 256, "forget passphrase"},
{ oHomedir, "homedir", 2, "@" },
{0}
};
static const char *
my_strusage (int level)
{
const char *p;
switch (level)
{
case 11: p = "gpg-preset-passphrase (GnuPG)";
break;
case 13: p = VERSION; break;
case 17: p = PRINTABLE_OS_NAME; break;
case 19: p = _("Please report bugs to <@EMAIL@>.\n"); break;
case 1:
case 40:
p = _("Usage: gpg-preset-passphrase [options] KEYGRIP (-h for help)\n");
break;
case 41:
p = _("Syntax: gpg-preset-passphrase [options] KEYGRIP\n"
"Password cache maintenance\n");
break;
default: p = NULL;
}
return p;
}
/* Include the implementation of map_spwq_error. */
MAP_SPWQ_ERROR_IMPL
static void
preset_passphrase (const char *keygrip)
{
int rc;
char *line;
/* FIXME: Use secure memory. */
char passphrase[500];
char *passphrase_esc;
if (!opt_passphrase)
{
rc = read (0, passphrase, sizeof (passphrase) - 1);
if (rc < 0)
{
log_error ("reading passphrase failed: %s\n",
gpg_strerror (gpg_error_from_syserror ()));
return;
}
passphrase[rc] = '\0';
line = strchr (passphrase, '\n');
if (line)
{
if (line > passphrase && line[-1] == '\r')
line--;
*line = '\0';
}
/* FIXME: How to handle empty passwords? */
}
{
const char *s = opt_passphrase ? opt_passphrase : passphrase;
passphrase_esc = bin2hex (s, strlen (s), NULL);
}
if (!passphrase_esc)
{
log_error ("can not escape string: %s\n",
gpg_strerror (gpg_error_from_syserror ()));
return;
}
rc = asprintf (&line, "PRESET_PASSPHRASE %s -1 %s\n", keygrip,
passphrase_esc);
wipememory (passphrase_esc, strlen (passphrase_esc));
xfree (passphrase_esc);
if (rc < 0)
{
log_error ("caching passphrase failed: %s\n",
gpg_strerror (gpg_error_from_syserror ()));
return;
}
if (!opt_passphrase)
wipememory (passphrase, sizeof (passphrase));
rc = map_spwq_error (simple_query (line));
if (rc)
{
log_error ("caching passphrase failed: %s\n", gpg_strerror (rc));
return;
}
wipememory (line, strlen (line));
xfree (line);
}
static void
forget_passphrase (const char *keygrip)
{
int rc;
char *line;
rc = asprintf (&line, "CLEAR_PASSPHRASE %s\n", keygrip);
if (rc < 0)
rc = gpg_error_from_syserror ();
else
rc = map_spwq_error (simple_query (line));
if (rc)
{
log_error ("clearing passphrase failed: %s\n", gpg_strerror (rc));
return;
}
xfree (line);
}
int
main (int argc, char **argv)
{
ARGPARSE_ARGS pargs;
int cmd = 0;
const char *keygrip = NULL;
set_strusage (my_strusage);
log_set_prefix ("gpg-preset-passphrase", 1);
/* Make sure that our subsystems are ready. */
i18n_init ();
init_common_subsystems (&argc, &argv);
opt_homedir = default_homedir ();
pargs.argc = &argc;
pargs.argv = &argv;
pargs.flags= 1; /* (do not remove the args) */
while (arg_parse (&pargs, opts) )
{
switch (pargs.r_opt)
{
case oVerbose: opt.verbose++; break;
case oHomedir: opt_homedir = pargs.r.ret_str; break;
case oPreset: cmd = oPreset; break;
case oForget: cmd = oForget; break;
case oPassphrase: opt_passphrase = pargs.r.ret_str; break;
default : pargs.err = 2; break;
}
}
if (log_get_errorcount(0))
exit(2);
if (argc == 1)
keygrip = *argv;
else
usage (1);
/* Tell simple-pwquery about the the standard socket name. */
{
char *tmp = make_filename (opt_homedir, "S.gpg-agent", NULL);
simple_pw_set_socket (tmp);
xfree (tmp);
}
if (cmd == oPreset)
preset_passphrase (keygrip);
else if (cmd == oForget)
forget_passphrase (keygrip);
else
log_error ("one of the options --preset or --forget must be given\n");
agent_exit (0);
return 8; /*NOTREACHED*/
}
void
agent_exit (int rc)
{
rc = rc? rc : log_get_errorcount(0)? 2 : 0;
exit (rc);
}

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Tue, Feb 3, 11:34 PM (1 d, 11 h)
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