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![Werner Koch](/assets/img/avatar_default.png)
We better do this once and for all instead of cluttering all future commits with diffs of trailing white spaces. In the majority of cases blank or single lines are affected and thus this change won't disturb a git blame too much. For future commits the pre-commit scripts checks that this won't happen again.
270 lines
5.9 KiB
C
270 lines
5.9 KiB
C
/* preset-passphrase.c - A tool to preset a passphrase.
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* Copyright (C) 2004 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <stdarg.h>
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#include <string.h>
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#include <errno.h>
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#include <assert.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#ifdef HAVE_LOCALE_H
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#include <locale.h>
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#endif
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#ifdef HAVE_LANGINFO_CODESET
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#include <langinfo.h>
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#endif
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#ifdef HAVE_DOSISH_SYSTEM
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#include <fcntl.h> /* for setmode() */
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#endif
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#ifdef HAVE_W32_SYSTEM
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#include <windows.h> /* To initialize the sockets. fixme */
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#endif
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#define JNLIB_NEED_LOG_LOGV
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#include "agent.h"
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#include "simple-pwquery.h"
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#include "i18n.h"
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#include "sysutils.h"
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enum cmd_and_opt_values
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{ aNull = 0,
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oVerbose = 'v',
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oPassphrase = 'P',
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oPreset = 'c',
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oForget = 'f',
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oNoVerbose = 500,
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oHomedir,
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aTest };
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static const char *opt_homedir;
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static const char *opt_passphrase;
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static ARGPARSE_OPTS opts[] = {
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{ 301, NULL, 0, N_("@Options:\n ") },
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{ oVerbose, "verbose", 0, "verbose" },
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{ oPassphrase, "passphrase", 2, "|STRING|use passphrase STRING" },
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{ oPreset, "preset", 256, "preset passphrase"},
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{ oForget, "forget", 256, "forget passphrase"},
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{ oHomedir, "homedir", 2, "@" },
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{0}
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};
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static const char *
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my_strusage (int level)
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{
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const char *p;
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switch (level)
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{
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case 11: p = "gpg-preset-passphrase (GnuPG)";
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break;
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case 13: p = VERSION; break;
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case 17: p = PRINTABLE_OS_NAME; break;
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case 19: p = _("Please report bugs to <@EMAIL@>.\n"); break;
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case 1:
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case 40:
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p = _("Usage: gpg-preset-passphrase [options] KEYGRIP (-h for help)\n");
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break;
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case 41:
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p = _("Syntax: gpg-preset-passphrase [options] KEYGRIP\n"
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"Password cache maintenance\n");
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break;
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default: p = NULL;
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}
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return p;
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}
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/* Include the implementation of map_spwq_error. */
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MAP_SPWQ_ERROR_IMPL
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static void
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preset_passphrase (const char *keygrip)
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{
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int rc;
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char *line;
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/* FIXME: Use secure memory. */
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char passphrase[500];
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char *passphrase_esc;
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if (!opt_passphrase)
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{
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rc = read (0, passphrase, sizeof (passphrase) - 1);
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if (rc < 0)
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{
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log_error ("reading passphrase failed: %s\n",
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gpg_strerror (gpg_error_from_syserror ()));
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return;
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}
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passphrase[rc] = '\0';
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line = strchr (passphrase, '\n');
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if (line)
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{
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if (line > passphrase && line[-1] == '\r')
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line--;
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*line = '\0';
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}
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/* FIXME: How to handle empty passwords? */
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}
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{
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const char *s = opt_passphrase ? opt_passphrase : passphrase;
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passphrase_esc = bin2hex (s, strlen (s), NULL);
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}
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if (!passphrase_esc)
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{
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log_error ("can not escape string: %s\n",
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gpg_strerror (gpg_error_from_syserror ()));
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return;
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}
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rc = asprintf (&line, "PRESET_PASSPHRASE %s -1 %s\n", keygrip,
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passphrase_esc);
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wipememory (passphrase_esc, strlen (passphrase_esc));
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xfree (passphrase_esc);
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if (rc < 0)
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{
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log_error ("caching passphrase failed: %s\n",
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gpg_strerror (gpg_error_from_syserror ()));
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return;
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}
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if (!opt_passphrase)
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wipememory (passphrase, sizeof (passphrase));
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rc = map_spwq_error (simple_query (line));
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if (rc)
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{
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log_error ("caching passphrase failed: %s\n", gpg_strerror (rc));
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return;
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}
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wipememory (line, strlen (line));
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xfree (line);
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}
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static void
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forget_passphrase (const char *keygrip)
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{
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int rc;
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char *line;
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rc = asprintf (&line, "CLEAR_PASSPHRASE %s\n", keygrip);
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if (rc < 0)
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rc = gpg_error_from_syserror ();
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else
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rc = map_spwq_error (simple_query (line));
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if (rc)
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{
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log_error ("clearing passphrase failed: %s\n", gpg_strerror (rc));
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return;
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}
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xfree (line);
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}
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int
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main (int argc, char **argv)
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{
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ARGPARSE_ARGS pargs;
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int cmd = 0;
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const char *keygrip = NULL;
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set_strusage (my_strusage);
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log_set_prefix ("gpg-preset-passphrase", 1);
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/* Make sure that our subsystems are ready. */
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i18n_init ();
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init_common_subsystems (&argc, &argv);
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opt_homedir = default_homedir ();
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pargs.argc = &argc;
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pargs.argv = &argv;
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pargs.flags= 1; /* (do not remove the args) */
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while (arg_parse (&pargs, opts) )
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{
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switch (pargs.r_opt)
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{
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case oVerbose: opt.verbose++; break;
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case oHomedir: opt_homedir = pargs.r.ret_str; break;
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case oPreset: cmd = oPreset; break;
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case oForget: cmd = oForget; break;
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case oPassphrase: opt_passphrase = pargs.r.ret_str; break;
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default : pargs.err = 2; break;
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}
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}
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if (log_get_errorcount(0))
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exit(2);
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if (argc == 1)
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keygrip = *argv;
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else
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usage (1);
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/* Tell simple-pwquery about the the standard socket name. */
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{
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char *tmp = make_filename (opt_homedir, "S.gpg-agent", NULL);
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simple_pw_set_socket (tmp);
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xfree (tmp);
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}
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if (cmd == oPreset)
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preset_passphrase (keygrip);
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else if (cmd == oForget)
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forget_passphrase (keygrip);
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else
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log_error ("one of the options --preset or --forget must be given\n");
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agent_exit (0);
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return 8; /*NOTREACHED*/
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}
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void
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agent_exit (int rc)
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{
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rc = rc? rc : log_get_errorcount(0)? 2 : 0;
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exit (rc);
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}
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