GNUPG-1-9-BRANCH gnupg (preset-passphrase.c)
cvs user wk
cvs at cvs.gnupg.org
Tue Dec 21 21:42:40 CET 2004
Date: Tuesday, December 21, 2004 @ 21:47:40
Author: wk
Path: /cvs/gnupg/gnupg
Tag: GNUPG-1-9-BRANCH
Added: preset-passphrase.c
Adding the tool itself.
---------------------+
preset-passphrase.c | 290 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 290 insertions(+)
Index: gnupg/preset-passphrase.c
diff -u /dev/null gnupg/preset-passphrase.c:1.1.2.1
--- /dev/null Tue Dec 21 21:47:40 2004
+++ gnupg/preset-passphrase.c Tue Dec 21 21:47:40 2004
@@ -0,0 +1,290 @@
+/* preset-passphrase.c - A tool to preset a passphrase.
+ * Copyright (C) 2002, 2003, 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 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 <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
+
+#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 };
+
+struct rsa_secret_key_s
+ {
+ gcry_mpi_t n; /* public modulus */
+ gcry_mpi_t e; /* public exponent */
+ gcry_mpi_t d; /* exponent */
+ gcry_mpi_t p; /* prime p. */
+ gcry_mpi_t q; /* prime q. */
+ gcry_mpi_t u; /* inverse of p mod q. */
+ };
+
+
+static 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 <" PACKAGE_BUGREPORT ">.\n");
+ break;
+ case 1:
+ case 40: p = _("Usage: gpg-preset-passphrase [options] KEYID (-h for help)\n");
+ break;
+ case 41: p = _("Syntax: gpg-preset-passphrase [options] KEYID\n"
+ "Password cache maintenance\n");
+ break;
+
+ default: p = NULL;
+ }
+ return p;
+}
+
+
+
+static void
+i18n_init (void)
+{
+#ifdef USE_SIMPLE_GETTEXT
+ set_gettext_file( PACKAGE_GT );
+#else
+#ifdef ENABLE_NLS
+ setlocale (LC_ALL, "");
+ bindtextdomain (PACKAGE_GT, LOCALEDIR);
+ textdomain (PACKAGE_GT);
+#endif
+#endif
+}
+
+
+static gpg_error_t
+map_spwq_error (int err)
+{
+ switch (err)
+ {
+ case 0:
+ return 0;
+ case SPWQ_OUT_OF_CORE:
+ return gpg_error_from_errno (ENOMEM);
+ case SPWQ_IO_ERROR:
+ return gpg_error_from_errno (EIO);
+ case SPWQ_PROTOCOL_ERROR:
+ return gpg_error (GPG_ERR_PROTOCOL_VIOLATION);
+ case SPWQ_ERR_RESPONSE:
+ return gpg_error (GPG_ERR_INV_RESPONSE);
+ case SPWQ_NO_AGENT:
+ return gpg_error (GPG_ERR_NO_AGENT);
+ case SPWQ_SYS_ERROR:
+ return gpg_error_from_errno (errno);
+ case SPWQ_GENERAL_ERROR:
+ default:
+ return gpg_error (GPG_ERR_GENERAL);
+ }
+}
+
+
+static void
+preset_passphrase (const char *keygrip)
+{
+ int rc;
+ char *line;
+ /* FIXME: Use secure memory. */
+ char passphrase[500];
+
+ rc = read (0, passphrase, sizeof (passphrase) - 1);
+ if (rc < 0)
+ {
+ log_error ("reading passphrase failed %s\n",
+ gpg_strerror (gpg_error_from_errno (errno)));
+ return;
+ }
+ passphrase[rc] = '\0';
+ line = strchr (passphrase, '\n');
+ if (line)
+ {
+ line--;
+ if (line > passphrase && line[-1] == '\r')
+ line--;
+ *line = '\0';
+ }
+
+ /* FIXME: How to handle empty passwords? */
+
+ rc = asprintf (&line, "PRESET_PASSPHRASE %s -1 %s\n", keygrip, passphrase);
+ if (rc < 0)
+ {
+ log_error ("caching passphrase failed %s\n",
+ gpg_strerror (gpg_error_from_errno (errno)));
+ return;
+ }
+ 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));
+ free (line);
+}
+
+
+static void
+forget_passphrase (const char *keygrip)
+{
+ int rc;
+ char *line;
+
+ rc = asprintf (&line, "CLEAR_PASSPHRASE %s\n", keygrip);
+ if (rc < 0)
+ {
+ log_error ("clearing passphrase failed %s\n",
+ gpg_strerror (gpg_error_from_errno (errno)));
+ return;
+ }
+ free (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);
+
+ /* Try to auto set the character set. */
+ set_native_charset (NULL);
+
+ i18n_init ();
+
+ opt_homedir = getenv ("GNUPGHOME");
+#ifdef HAVE_W32_SYSTEM
+ if (!opt_homedir || !*opt_homedir)
+ opt_homedir = read_w32_registry_string (NULL,
+ "Software\\GNU\\GnuPG", "HomeDir");
+#endif /*HAVE_W32_SYSTEM*/
+ if (!opt_homedir || !*opt_homedir)
+ opt_homedir = GNUPG_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);
+
+ if (cmd == oPreset)
+ preset_passphrase (keygrip);
+ else if (cmd == oForget)
+ forget_passphrase (keygrip);
+ else
+ usage (1);
+
+ 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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