summaryrefslogtreecommitdiffstats
path: root/agent/preset-passphrase.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--agent/preset-passphrase.c272
1 files changed, 272 insertions, 0 deletions
diff --git a/agent/preset-passphrase.c b/agent/preset-passphrase.c
new file mode 100644
index 0000000..c5aeafe
--- /dev/null
+++ b/agent/preset-passphrase.c
@@ -0,0 +1,272 @@
+/* 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 <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#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
+# ifdef HAVE_WINSOCK2_H
+# include <winsock2.h>
+# endif
+# include <windows.h> /* To initialize the sockets. fixme */
+#endif
+
+#define INCLUDED_BY_MAIN_MODULE 1
+#include "agent.h"
+#include "../common/simple-pwquery.h"
+#include "../common/i18n.h"
+#include "../common/sysutils.h"
+#include "../common/init.h"
+
+
+enum cmd_and_opt_values
+{ aNull = 0,
+ oVerbose = 'v',
+ oPassphrase = 'P',
+
+ oPreset = 'c',
+ oForget = 'f',
+
+ oNoVerbose = 500,
+
+ oHomedir,
+
+aTest };
+
+
+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, "@" },
+
+ ARGPARSE_end ()
+};
+
+
+static const char *
+my_strusage (int level)
+{
+ const char *p;
+ switch (level)
+ {
+ case 9: p = "GPL-3.0-or-later"; break;
+ case 11: p = "gpg-preset-passphrase (@GNUPG@)";
+ break;
+ case 13: p = VERSION; break;
+ case 14: p = GNUPG_DEF_COPYRIGHT_LINE; 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;
+}
+
+
+
+
+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 = 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 = 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;
+
+ early_system_init ();
+ set_strusage (my_strusage);
+ log_set_prefix ("gpg-preset-passphrase", GPGRT_LOG_WITH_PREFIX);
+
+ /* Make sure that our subsystems are ready. */
+ i18n_init ();
+ init_common_subsystems (&argc, &argv);
+
+ pargs.argc = &argc;
+ pargs.argv = &argv;
+ pargs.flags= ARGPARSE_FLAG_KEEP;
+ while (gnupg_argparse (NULL, &pargs, opts))
+ {
+ switch (pargs.r_opt)
+ {
+ case oVerbose: opt.verbose++; break;
+ case oHomedir: gnupg_set_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;
+ }
+ }
+ gnupg_argparse (NULL, &pargs, NULL); /* Release internal state. */
+ if (log_get_errorcount(0))
+ exit(2);
+
+ if (argc == 1)
+ keygrip = *argv;
+ else
+ usage (1);
+
+ /* Tell simple-pwquery about the standard socket name. */
+ {
+ char *tmp = make_filename (gnupg_socketdir (), GPG_AGENT_SOCK_NAME, 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);
+}