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Adding the tool itself.
This commit is contained in:
Werner Koch
parent
e5f5833d07
commit
10c258591a
290
preset-passphrase.c
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290
preset-passphrase.c
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/* preset-passphrase.c - A tool to preset a passphrase.
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* Copyright (C) 2002, 2003, 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 2 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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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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#define JNLIB_NEED_LOG_LOGV
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#include "agent.h"
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#include "minip12.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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struct rsa_secret_key_s
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{
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gcry_mpi_t n; /* public modulus */
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gcry_mpi_t e; /* public exponent */
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gcry_mpi_t d; /* exponent */
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gcry_mpi_t p; /* prime p. */
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gcry_mpi_t q; /* prime q. */
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gcry_mpi_t u; /* inverse of p mod q. */
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};
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static 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 <" PACKAGE_BUGREPORT ">.\n");
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break;
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case 1:
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case 40: p = _("Usage: gpg-preset-passphrase [options] KEYID (-h for help)\n");
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break;
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case 41: p = _("Syntax: gpg-preset-passphrase [options] KEYID\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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static void
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i18n_init (void)
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{
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#ifdef USE_SIMPLE_GETTEXT
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set_gettext_file( PACKAGE_GT );
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#else
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#ifdef ENABLE_NLS
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setlocale (LC_ALL, "");
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bindtextdomain (PACKAGE_GT, LOCALEDIR);
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textdomain (PACKAGE_GT);
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#endif
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#endif
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}
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static gpg_error_t
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map_spwq_error (int err)
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{
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switch (err)
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{
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case 0:
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return 0;
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case SPWQ_OUT_OF_CORE:
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return gpg_error_from_errno (ENOMEM);
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case SPWQ_IO_ERROR:
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return gpg_error_from_errno (EIO);
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case SPWQ_PROTOCOL_ERROR:
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return gpg_error (GPG_ERR_PROTOCOL_VIOLATION);
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case SPWQ_ERR_RESPONSE:
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return gpg_error (GPG_ERR_INV_RESPONSE);
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case SPWQ_NO_AGENT:
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return gpg_error (GPG_ERR_NO_AGENT);
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case SPWQ_SYS_ERROR:
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return gpg_error_from_errno (errno);
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case SPWQ_GENERAL_ERROR:
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default:
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return gpg_error (GPG_ERR_GENERAL);
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}
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}
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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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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_errno (errno)));
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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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line--;
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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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rc = asprintf (&line, "PRESET_PASSPHRASE %s -1 %s\n", keygrip, passphrase);
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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_errno (errno)));
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return;
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}
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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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free (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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{
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log_error ("clearing passphrase failed %s\n",
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gpg_strerror (gpg_error_from_errno (errno)));
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return;
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}
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free (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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/* Try to auto set the character set. */
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set_native_charset (NULL);
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i18n_init ();
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opt_homedir = getenv ("GNUPGHOME");
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#ifdef HAVE_W32_SYSTEM
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if (!opt_homedir || !*opt_homedir)
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opt_homedir = read_w32_registry_string (NULL,
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"Software\\GNU\\GnuPG", "HomeDir");
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#endif /*HAVE_W32_SYSTEM*/
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if (!opt_homedir || !*opt_homedir)
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opt_homedir = GNUPG_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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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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usage (1);
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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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