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![NIIBE Yutaka](/assets/img/avatar_default.png)
* agent/findkey.c (unprotect): Use gnupg_sleep. * agent/gpg-agent.c (handle_connections): Likewise. * dirmngr/crlfetch.c (handle_connections): Likewise. * kbx/keyboxd.c (handle_connections): Likewise. * tpm2d/tpm3daemon.c (handle_connections): Likewise. * scd/scdaemon.c (handle_connections): Likewise. * scd/command.c (cmd_lock): Likewise. * dirmngr/ldap-wrapper.c (ldap_reaper_thread): Likewise. (ldap_wrapper_wait_connections): Use gnupg_usleep. -- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
1845 lines
51 KiB
C
1845 lines
51 KiB
C
/* keyboxd.c - The GnuPG Keybox Daemon
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* Copyright (C) 2000-2020 Free Software Foundation, Inc.
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* Copyright (C) 2000-2019 Werner Koch
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* Copyright (C) 2015-2020 g10 Code GmbH
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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 <https://www.gnu.org/licenses/>.
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* SPDX-License-Identifier: GPL-3.0+
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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 <time.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#ifdef HAVE_W32_SYSTEM
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# ifndef WINVER
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# define WINVER 0x0500 /* Same as in common/sysutils.c */
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# endif
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# include <winsock2.h>
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#else /*!HAVE_W32_SYSTEM*/
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# include <sys/socket.h>
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# include <sys/un.h>
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#endif /*!HAVE_W32_SYSTEM*/
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#include <unistd.h>
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#ifdef HAVE_SIGNAL_H
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# include <signal.h>
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#endif
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#include <npth.h>
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#define INCLUDED_BY_MAIN_MODULE 1
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#define GNUPG_COMMON_NEED_AFLOCAL
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#include "keyboxd.h"
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#include <assuan.h> /* Malloc hooks and socket wrappers. */
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#include "../common/i18n.h"
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#include "../common/sysutils.h"
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#include "../common/asshelp.h"
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#include "../common/init.h"
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#include "../common/gc-opt-flags.h"
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#include "../common/exechelp.h"
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#include "../common/comopt.h"
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#include "frontend.h"
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/* Urrgs: Put this into a separate header - but it needs assuan.h first. */
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extern int kbxd_assuan_log_monitor (assuan_context_t ctx, unsigned int cat,
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const char *msg);
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enum cmd_and_opt_values
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{
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aNull = 0,
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oQuiet = 'q',
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oVerbose = 'v',
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oNoVerbose = 500,
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aGPGConfList,
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aGPGConfTest,
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oOptions,
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oDebug,
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oDebugAll,
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oDebugWait,
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oNoGreeting,
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oNoOptions,
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oHomedir,
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oNoDetach,
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oLogFile,
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oServer,
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oDaemon,
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oFakedSystemTime,
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oListenBacklog,
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oDisableCheckOwnSocket,
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oDummy
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};
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static gpgrt_opt_t opts[] = {
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ARGPARSE_c (aGPGConfList, "gpgconf-list", "@"),
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ARGPARSE_c (aGPGConfTest, "gpgconf-test", "@"),
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ARGPARSE_header (NULL, N_("Options used for startup")),
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ARGPARSE_s_n (oDaemon, "daemon", N_("run in daemon mode (background)")),
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ARGPARSE_s_n (oServer, "server", N_("run in server mode (foreground)")),
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ARGPARSE_s_n (oNoDetach, "no-detach", N_("do not detach from the console")),
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ARGPARSE_s_s (oHomedir, "homedir", "@"),
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ARGPARSE_conffile (oOptions, "options", N_("|FILE|read options from FILE")),
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ARGPARSE_header ("Monitor", N_("Options controlling the diagnostic output")),
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ARGPARSE_s_n (oVerbose, "verbose", N_("verbose")),
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ARGPARSE_s_n (oQuiet, "quiet", N_("be somewhat more quiet")),
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ARGPARSE_s_s (oDebug, "debug", "@"),
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ARGPARSE_s_n (oDebugAll, "debug-all", "@"),
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ARGPARSE_s_i (oDebugWait, "debug-wait", "@"),
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ARGPARSE_s_s (oLogFile, "log-file", N_("use a log file for the server")),
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ARGPARSE_header ("Configuration",
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N_("Options controlling the configuration")),
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ARGPARSE_s_n (oDisableCheckOwnSocket, "disable-check-own-socket", "@"),
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ARGPARSE_s_s (oFakedSystemTime, "faked-system-time", "@"),
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ARGPARSE_s_i (oListenBacklog, "listen-backlog", "@"),
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ARGPARSE_end () /* End of list */
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};
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/* The list of supported debug flags. */
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static struct debug_flags_s debug_flags [] =
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{
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{ DBG_MPI_VALUE , "mpi" },
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{ DBG_CRYPTO_VALUE , "crypto" },
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{ DBG_MEMORY_VALUE , "memory" },
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{ DBG_CACHE_VALUE , "cache" },
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{ DBG_MEMSTAT_VALUE, "memstat" },
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{ DBG_HASHING_VALUE, "hashing" },
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{ DBG_IPC_VALUE , "ipc" },
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{ DBG_CLOCK_VALUE , "clock" },
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{ DBG_LOOKUP_VALUE , "lookup" },
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{ 77, NULL } /* 77 := Do not exit on "help" or "?". */
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};
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/* The timer tick used for housekeeping stuff. Note that on Windows
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* we use a SetWaitableTimer seems to signal earlier than about 2
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* seconds. Thus we use 4 seconds on all platforms except for
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* Windowsce. CHECK_OWN_SOCKET_INTERVAL defines how often we check
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* our own socket in standard socket mode. If that value is 0 we
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* don't check at all. All values are in seconds. */
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#if defined(HAVE_W32CE_SYSTEM)
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# define TIMERTICK_INTERVAL (60)
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# define CHECK_OWN_SOCKET_INTERVAL (0) /* Never */
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#else
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# define TIMERTICK_INTERVAL (4)
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# define CHECK_OWN_SOCKET_INTERVAL (60)
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#endif
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/* The list of open file descriptors at startup. Note that this list
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* has been allocated using the standard malloc. */
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#ifndef HAVE_W32_SYSTEM
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static int *startup_fd_list;
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#endif
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/* The signal mask at startup and a flag telling whether it is valid. */
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#ifdef HAVE_SIGPROCMASK
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static sigset_t startup_signal_mask;
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static int startup_signal_mask_valid;
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#endif
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/* Flag to indicate that a shutdown was requested. */
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static int shutdown_pending;
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/* Counter for the currently running own socket checks. */
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static int check_own_socket_running;
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/* Flag to indicate that we shall not watch our own socket. */
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static int disable_check_own_socket;
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/* Flag to inhibit socket removal in cleanup. */
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static int inhibit_socket_removal;
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/* Name of the communication socket used for client requests. */
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static char *socket_name;
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/* We need to keep track of the server's nonces (these are dummies for
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* POSIX systems). */
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static assuan_sock_nonce_t socket_nonce;
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/* Value for the listen() backlog argument. We use the same value for
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* all sockets - 64 is on current Linux half of the default maximum.
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* Let's try this as default. Change at runtime with --listen-backlog. */
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static int listen_backlog = 64;
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/* Name of a config file, which will be reread on a HUP if it is not NULL. */
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static char *config_filename;
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/* Keep track of the current log file so that we can avoid updating
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* the log file after a SIGHUP if it didn't changed. Malloced. */
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static char *current_logfile;
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/* This flag is true if the inotify mechanism for detecting the
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* removal of the homedir is active. This flag is used to disable the
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* alternative but portable stat based check. */
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static int have_homedir_inotify;
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/* Depending on how keyboxd was started, the homedir inotify watch may
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* not be reliable. This flag is set if we assume that inotify works
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* reliable. */
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static int reliable_homedir_inotify;
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/* Number of active connections. */
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static int active_connections;
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/* This object is used to dispatch progress messages from Libgcrypt to
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* the right thread. Given that we will have at max only a few dozen
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* connections at a time, using a linked list is the easiest way to
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* handle this. */
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struct progress_dispatch_s
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{
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struct progress_dispatch_s *next;
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/* The control object of the connection. If this is NULL no
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* connection is associated with this item and it is free for reuse
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* by new connections. */
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ctrl_t ctrl;
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/* The thread id of (npth_self) of the connection. */
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npth_t tid;
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/* The callback set by the connection. This is similar to the
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* Libgcrypt callback but with the control object passed as the
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* first argument. */
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void (*cb)(ctrl_t ctrl,
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const char *what, int printchar,
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int current, int total);
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};
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struct progress_dispatch_s *progress_dispatch_list;
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/*
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* Local prototypes.
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*/
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static char *create_socket_name (char *standard_name, int with_homedir);
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static gnupg_fd_t create_server_socket (char *name, int cygwin,
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assuan_sock_nonce_t *nonce);
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static void create_directories (void);
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static void kbxd_libgcrypt_progress_cb (void *data, const char *what,
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int printchar,
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int current, int total);
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static void kbxd_init_default_ctrl (ctrl_t ctrl);
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static void kbxd_deinit_default_ctrl (ctrl_t ctrl);
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static void handle_connections (gnupg_fd_t listen_fd);
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static void check_own_socket (void);
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static int check_for_running_kbxd (int silent);
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/* Pth wrapper function definitions. */
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ASSUAN_SYSTEM_NPTH_IMPL;
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/*
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* Functions.
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*/
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/* Allocate a string describing a library version by calling a GETFNC.
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* This function is expected to be called only once. GETFNC is
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* expected to have a semantic like gcry_check_version (). */
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static char *
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make_libversion (const char *libname, const char *(*getfnc)(const char*))
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{
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return xstrconcat (libname, " ", getfnc (NULL), NULL);
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}
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/* Return strings describing this program. The case values are
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* described in Libgpg-error. The values here override the default
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* values given by strusage. */
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static const char *
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my_strusage (int level)
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{
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static char *ver_gcry;
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const char *p;
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switch (level)
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{
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case 9: p = "GPL-3.0-or-later"; break;
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case 11: p = "keyboxd (@GNUPG@)";
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break;
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case 13: p = VERSION; break;
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case 14: p = GNUPG_DEF_COPYRIGHT_LINE; break;
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case 17: p = PRINTABLE_OS_NAME; break;
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/* TRANSLATORS: @EMAIL@ will get replaced by the actual bug
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reporting address. This is so that we can change the
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reporting address without breaking the translations. */
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case 19: p = _("Please report bugs to <@EMAIL@>.\n"); break;
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case 20:
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if (!ver_gcry)
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ver_gcry = make_libversion ("libgcrypt", gcry_check_version);
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p = ver_gcry;
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break;
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case 1:
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case 40: p = _("Usage: keyboxd [options] (-h for help)");
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break;
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case 41: p = _("Syntax: keyboxd [options] [command [args]]\n"
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"Public key management for @GNUPG@\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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/* Setup the debugging. Note that we don't fail here, because it is
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* important to keep keyboxd running even after re-reading the options
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* due to a SIGHUP. */
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static void
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set_debug (void)
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{
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if (opt.debug && !opt.verbose)
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opt.verbose = 1;
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if (opt.debug && opt.quiet)
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opt.quiet = 0;
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if (opt.debug & DBG_MPI_VALUE)
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gcry_control (GCRYCTL_SET_DEBUG_FLAGS, 2);
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if (opt.debug & DBG_CRYPTO_VALUE )
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gcry_control (GCRYCTL_SET_DEBUG_FLAGS, 1);
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gcry_control (GCRYCTL_SET_VERBOSITY, (int)opt.verbose);
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if (opt.debug)
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parse_debug_flag (NULL, &opt.debug, debug_flags);
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}
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|
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/* Helper for cleanup to remove one socket with NAME. */
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static void
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remove_socket (char *name)
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{
|
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if (name && *name)
|
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{
|
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gnupg_remove (name);
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*name = 0;
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}
|
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}
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|
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/* Cleanup code for this program. This is either called has an atexit
|
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handler or directly. */
|
||
static void
|
||
cleanup (void)
|
||
{
|
||
static int done;
|
||
|
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if (done)
|
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return;
|
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done = 1;
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if (!inhibit_socket_removal)
|
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remove_socket (socket_name);
|
||
}
|
||
|
||
|
||
/* Handle options which are allowed to be reset after program start.
|
||
* Return true when the current option in PARGS could be handled and
|
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* false if not. As a special feature, passing a value of NULL for
|
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* PARGS, resets the options to the default. REREAD should be set
|
||
* true if it is not the initial option parsing. */
|
||
static int
|
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parse_rereadable_options (gpgrt_argparse_t *pargs, int reread)
|
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{
|
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if (!pargs)
|
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{ /* reset mode */
|
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opt.quiet = 0;
|
||
opt.verbose = 0;
|
||
opt.debug = 0;
|
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disable_check_own_socket = 0;
|
||
return 1;
|
||
}
|
||
|
||
switch (pargs->r_opt)
|
||
{
|
||
case oQuiet: opt.quiet = 1; break;
|
||
case oVerbose: opt.verbose++; break;
|
||
|
||
case oDebug:
|
||
parse_debug_flag (pargs->r.ret_str, &opt.debug, debug_flags);
|
||
break;
|
||
case oDebugAll: opt.debug = ~0; break;
|
||
|
||
case oLogFile:
|
||
if (!reread)
|
||
return 0; /* not handled */
|
||
if (!current_logfile || !pargs->r.ret_str
|
||
|| strcmp (current_logfile, pargs->r.ret_str))
|
||
{
|
||
log_set_file (pargs->r.ret_str);
|
||
xfree (current_logfile);
|
||
current_logfile = xtrystrdup (pargs->r.ret_str);
|
||
}
|
||
break;
|
||
|
||
case oDisableCheckOwnSocket: disable_check_own_socket = 1; break;
|
||
|
||
default:
|
||
return 0; /* not handled */
|
||
}
|
||
|
||
return 1; /* handled */
|
||
}
|
||
|
||
|
||
/* Fixup some options after all have been processed. */
|
||
static void
|
||
finalize_rereadable_options (void)
|
||
{
|
||
}
|
||
|
||
|
||
static void
|
||
thread_init_once (void)
|
||
{
|
||
static int npth_initialized = 0;
|
||
|
||
if (!npth_initialized)
|
||
{
|
||
npth_initialized++;
|
||
npth_init ();
|
||
}
|
||
gpgrt_set_syscall_clamp (npth_unprotect, npth_protect);
|
||
/* Now that we have set the syscall clamp we need to tell Libgcrypt
|
||
* that it should get them from libgpg-error. Note that Libgcrypt
|
||
* has already been initialized but at that point nPth was not
|
||
* initialized and thus Libgcrypt could not set its system call
|
||
* clamp. */
|
||
gcry_control (GCRYCTL_REINIT_SYSCALL_CLAMP, 0, 0);
|
||
}
|
||
|
||
|
||
static void
|
||
initialize_modules (void)
|
||
{
|
||
thread_init_once ();
|
||
assuan_set_system_hooks (ASSUAN_SYSTEM_NPTH);
|
||
}
|
||
|
||
|
||
/* The main entry point. */
|
||
int
|
||
main (int argc, char **argv )
|
||
{
|
||
gpgrt_argparse_t pargs;
|
||
int orig_argc;
|
||
char **orig_argv;
|
||
char *last_configname = NULL;
|
||
char *configname = NULL;
|
||
int debug_argparser = 0;
|
||
int pipe_server = 0;
|
||
int is_daemon = 0;
|
||
int nodetach = 0;
|
||
char *logfile = NULL;
|
||
int gpgconf_list = 0;
|
||
int debug_wait = 0;
|
||
struct assuan_malloc_hooks malloc_hooks;
|
||
|
||
early_system_init ();
|
||
|
||
/* Before we do anything else we save the list of currently open
|
||
* file descriptors and the signal mask. This info is required to
|
||
* do the exec call properly. We don't need it on Windows. */
|
||
#ifndef HAVE_W32_SYSTEM
|
||
startup_fd_list = get_all_open_fds ();
|
||
#endif /*!HAVE_W32_SYSTEM*/
|
||
#ifdef HAVE_SIGPROCMASK
|
||
if (!sigprocmask (SIG_UNBLOCK, NULL, &startup_signal_mask))
|
||
startup_signal_mask_valid = 1;
|
||
#endif /*HAVE_SIGPROCMASK*/
|
||
|
||
/* Set program name etc. */
|
||
gpgrt_set_strusage (my_strusage);
|
||
log_set_prefix ("keyboxd", GPGRT_LOG_WITH_PREFIX|GPGRT_LOG_WITH_PID);
|
||
|
||
/* Make sure that our subsystems are ready. */
|
||
i18n_init ();
|
||
init_common_subsystems (&argc, &argv);
|
||
gcry_control (GCRYCTL_DISABLE_SECMEM, 0);
|
||
|
||
malloc_hooks.malloc = gcry_malloc;
|
||
malloc_hooks.realloc = gcry_realloc;
|
||
malloc_hooks.free = gcry_free;
|
||
assuan_set_malloc_hooks (&malloc_hooks);
|
||
assuan_set_gpg_err_source (GPG_ERR_SOURCE_DEFAULT);
|
||
assuan_sock_init ();
|
||
assuan_sock_set_system_hooks (ASSUAN_SYSTEM_NPTH);
|
||
setup_libassuan_logging (&opt.debug, kbxd_assuan_log_monitor);
|
||
|
||
setup_libgcrypt_logging ();
|
||
gcry_set_progress_handler (kbxd_libgcrypt_progress_cb, NULL);
|
||
|
||
/* Set default options. */
|
||
parse_rereadable_options (NULL, 0); /* Reset them to default values. */
|
||
|
||
/* Check whether we have a config file on the commandline */
|
||
orig_argc = argc;
|
||
orig_argv = argv;
|
||
pargs.argc = &argc;
|
||
pargs.argv = &argv;
|
||
pargs.flags= (ARGPARSE_FLAG_KEEP | ARGPARSE_FLAG_NOVERSION);
|
||
while (gpgrt_argparse (NULL, &pargs, opts))
|
||
{
|
||
switch (pargs.r_opt)
|
||
{
|
||
case oDebug:
|
||
case oDebugAll:
|
||
debug_argparser++;
|
||
break;
|
||
|
||
case oHomedir:
|
||
gnupg_set_homedir (pargs.r.ret_str);
|
||
break;
|
||
}
|
||
}
|
||
/* Reset the flags. */
|
||
pargs.flags &= ~(ARGPARSE_FLAG_KEEP | ARGPARSE_FLAG_NOVERSION);
|
||
|
||
/* The configuraton directories for use by gpgrt_argparser. */
|
||
gpgrt_set_confdir (GPGRT_CONFDIR_SYS, gnupg_sysconfdir ());
|
||
gpgrt_set_confdir (GPGRT_CONFDIR_USER, gnupg_homedir ());
|
||
|
||
argc = orig_argc;
|
||
argv = orig_argv;
|
||
pargs.argc = &argc;
|
||
pargs.argv = &argv;
|
||
pargs.flags |= (ARGPARSE_FLAG_RESET
|
||
| ARGPARSE_FLAG_KEEP
|
||
| ARGPARSE_FLAG_SYS
|
||
| ARGPARSE_FLAG_USER);
|
||
|
||
while (gpgrt_argparser (&pargs, opts, "keyboxd" EXTSEP_S "conf"))
|
||
{
|
||
if (pargs.r_opt == ARGPARSE_CONFFILE)
|
||
{
|
||
if (debug_argparser)
|
||
log_info (_("reading options from '%s'\n"),
|
||
pargs.r_type? pargs.r.ret_str: "[cmdline]");
|
||
if (pargs.r_type)
|
||
{
|
||
xfree (last_configname);
|
||
last_configname = xstrdup (pargs.r.ret_str);
|
||
configname = last_configname;
|
||
}
|
||
else
|
||
configname = NULL;
|
||
continue;
|
||
}
|
||
if (parse_rereadable_options (&pargs, 0))
|
||
continue; /* Already handled */
|
||
switch (pargs.r_opt)
|
||
{
|
||
case aGPGConfList: gpgconf_list = 1; break;
|
||
case aGPGConfTest: gpgconf_list = 2; break;
|
||
case oDebugWait: debug_wait = pargs.r.ret_int; break;
|
||
case oNoGreeting: /* Dummy option. */ break;
|
||
case oNoVerbose: opt.verbose = 0; break;
|
||
case oNoOptions: break; /* no-options */
|
||
case oHomedir: gnupg_set_homedir (pargs.r.ret_str); break;
|
||
case oNoDetach: nodetach = 1; break;
|
||
case oLogFile: logfile = pargs.r.ret_str; break;
|
||
case oServer: pipe_server = 1; break;
|
||
case oDaemon: is_daemon = 1; break;
|
||
case oFakedSystemTime:
|
||
{
|
||
time_t faked_time = isotime2epoch (pargs.r.ret_str);
|
||
if (faked_time == (time_t)(-1))
|
||
faked_time = (time_t)strtoul (pargs.r.ret_str, NULL, 10);
|
||
gnupg_set_time (faked_time, 0);
|
||
}
|
||
break;
|
||
|
||
case oListenBacklog:
|
||
listen_backlog = pargs.r.ret_int;
|
||
break;
|
||
|
||
default:
|
||
if (configname)
|
||
pargs.err = ARGPARSE_PRINT_WARNING;
|
||
else
|
||
pargs.err = ARGPARSE_PRINT_ERROR;
|
||
break;
|
||
}
|
||
}
|
||
gpgrt_argparse (NULL, &pargs, NULL);
|
||
|
||
if (!last_configname)
|
||
config_filename = gpgrt_fnameconcat (gnupg_homedir (),
|
||
"keyboxd" EXTSEP_S "conf",
|
||
NULL);
|
||
else
|
||
{
|
||
config_filename = last_configname;
|
||
last_configname = NULL;
|
||
}
|
||
|
||
|
||
if (log_get_errorcount(0))
|
||
exit (2);
|
||
|
||
/* Get a default log file from common.conf. */
|
||
if (!logfile && !parse_comopt (GNUPG_MODULE_NAME_KEYBOXD, debug_argparser))
|
||
{
|
||
logfile = comopt.logfile;
|
||
comopt.logfile = NULL;
|
||
}
|
||
|
||
|
||
finalize_rereadable_options ();
|
||
|
||
/* Print a warning if an argument looks like an option. */
|
||
if (!opt.quiet && !(pargs.flags & ARGPARSE_FLAG_STOP_SEEN))
|
||
{
|
||
int i;
|
||
|
||
for (i=0; i < argc; i++)
|
||
if (argv[i][0] == '-' && argv[i][1] == '-')
|
||
log_info (_("Note: '%s' is not considered an option\n"), argv[i]);
|
||
}
|
||
|
||
#ifdef ENABLE_NLS
|
||
/* keyboxd usually does not output any messages because it runs in
|
||
* the background. For log files it is acceptable to have messages
|
||
* always encoded in utf-8. We switch here to utf-8, so that
|
||
* commands like --help still give native messages. It is far
|
||
* easier to switch only once instead of for every message and it
|
||
* actually helps when more then one thread is active (avoids an
|
||
* extra copy step). */
|
||
bind_textdomain_codeset (PACKAGE_GT, "UTF-8");
|
||
#endif
|
||
|
||
if (!pipe_server && !is_daemon && !gpgconf_list)
|
||
{
|
||
/* We have been called without any command and thus we merely
|
||
* check whether an instance of us is already running. We do
|
||
* this right here so that we don't clobber a logfile with this
|
||
* check but print the status directly to stderr. */
|
||
opt.debug = 0;
|
||
set_debug ();
|
||
check_for_running_kbxd (0);
|
||
kbxd_exit (0);
|
||
}
|
||
|
||
set_debug ();
|
||
|
||
if (atexit (cleanup))
|
||
{
|
||
log_error ("atexit failed\n");
|
||
cleanup ();
|
||
exit (1);
|
||
}
|
||
|
||
/* Try to create missing directories. */
|
||
create_directories ();
|
||
|
||
if (debug_wait && pipe_server)
|
||
{
|
||
thread_init_once ();
|
||
log_debug ("waiting for debugger - my pid is %u .....\n",
|
||
(unsigned int)getpid());
|
||
gnupg_sleep (debug_wait);
|
||
log_debug ("... okay\n");
|
||
}
|
||
|
||
if (gpgconf_list == 2)
|
||
kbxd_exit (0);
|
||
else if (gpgconf_list)
|
||
{
|
||
kbxd_exit (0);
|
||
}
|
||
|
||
/* Now start with logging to a file if this is desired. */
|
||
if (logfile)
|
||
{
|
||
log_set_file (logfile);
|
||
log_set_prefix (NULL, (GPGRT_LOG_WITH_PREFIX
|
||
| GPGRT_LOG_WITH_TIME
|
||
| GPGRT_LOG_WITH_PID));
|
||
current_logfile = xstrdup (logfile);
|
||
}
|
||
|
||
if (pipe_server)
|
||
{
|
||
/* This is the simple pipe based server */
|
||
ctrl_t ctrl;
|
||
|
||
initialize_modules ();
|
||
|
||
ctrl = xtrycalloc (1, sizeof *ctrl);
|
||
if (!ctrl)
|
||
{
|
||
log_error ("error allocating connection control data: %s\n",
|
||
strerror (errno) );
|
||
kbxd_exit (1);
|
||
}
|
||
kbxd_init_default_ctrl (ctrl);
|
||
|
||
/* kbxd_set_database (ctrl, "pubring.kbx", 0); */
|
||
kbxd_set_database (ctrl, "pubring.db", 0);
|
||
|
||
kbxd_start_command_handler (ctrl, GNUPG_INVALID_FD, 0);
|
||
kbxd_deinit_default_ctrl (ctrl);
|
||
xfree (ctrl);
|
||
}
|
||
else if (!is_daemon)
|
||
; /* NOTREACHED */
|
||
else
|
||
{ /* Regular daemon mode. */
|
||
gnupg_fd_t fd;
|
||
#ifndef HAVE_W32_SYSTEM
|
||
pid_t pid;
|
||
#endif
|
||
|
||
/* Create the sockets. */
|
||
socket_name = create_socket_name (KEYBOXD_SOCK_NAME, 1);
|
||
fd = create_server_socket (socket_name, 0, &socket_nonce);
|
||
|
||
fflush (NULL);
|
||
|
||
#ifdef HAVE_W32_SYSTEM
|
||
|
||
(void)nodetach;
|
||
initialize_modules ();
|
||
|
||
#else /*!HAVE_W32_SYSTEM*/
|
||
|
||
pid = fork ();
|
||
if (pid == (pid_t)-1)
|
||
{
|
||
log_fatal ("fork failed: %s\n", strerror (errno) );
|
||
exit (1);
|
||
}
|
||
else if (pid)
|
||
{ /* We are the parent */
|
||
|
||
/* Close the socket FD. */
|
||
close (fd);
|
||
|
||
/* The signal mask might not be correct right now and thus
|
||
* we restore it. That is not strictly necessary but some
|
||
* programs falsely assume a cleared signal mask. */
|
||
|
||
#ifdef HAVE_SIGPROCMASK
|
||
if (startup_signal_mask_valid)
|
||
{
|
||
if (sigprocmask (SIG_SETMASK, &startup_signal_mask, NULL))
|
||
log_error ("error restoring signal mask: %s\n",
|
||
strerror (errno));
|
||
}
|
||
else
|
||
log_info ("no saved signal mask\n");
|
||
#endif /*HAVE_SIGPROCMASK*/
|
||
|
||
*socket_name = 0; /* Don't let cleanup() remove the socket -
|
||
the child should do this from now on */
|
||
|
||
exit (0);
|
||
/*NOTREACHED*/
|
||
} /* End parent */
|
||
|
||
/*
|
||
* This is the child
|
||
*/
|
||
|
||
initialize_modules ();
|
||
|
||
/* Detach from tty and put process into a new session */
|
||
if (!nodetach)
|
||
{
|
||
int i;
|
||
unsigned int oldflags;
|
||
|
||
/* Close stdin, stdout and stderr unless it is the log stream */
|
||
for (i=0; i <= 2; i++)
|
||
{
|
||
if (!log_test_fd (i) && i != fd )
|
||
{
|
||
if ( ! close (i)
|
||
&& open ("/dev/null", i? O_WRONLY : O_RDONLY) == -1)
|
||
{
|
||
log_error ("failed to open '%s': %s\n",
|
||
"/dev/null", strerror (errno));
|
||
cleanup ();
|
||
exit (1);
|
||
}
|
||
}
|
||
}
|
||
if (setsid() == -1)
|
||
{
|
||
log_error ("setsid() failed: %s\n", strerror(errno) );
|
||
cleanup ();
|
||
exit (1);
|
||
}
|
||
|
||
log_get_prefix (&oldflags);
|
||
log_set_prefix (NULL, oldflags | GPGRT_LOG_RUN_DETACHED);
|
||
opt.running_detached = 1;
|
||
|
||
/* Because we don't support running a program on the command
|
||
* line we can assume that the inotify things works and thus
|
||
* we can avoid the regular stat calls. */
|
||
reliable_homedir_inotify = 1;
|
||
}
|
||
|
||
{
|
||
struct sigaction sa;
|
||
|
||
sa.sa_handler = SIG_IGN;
|
||
sigemptyset (&sa.sa_mask);
|
||
sa.sa_flags = 0;
|
||
sigaction (SIGPIPE, &sa, NULL);
|
||
}
|
||
#endif /*!HAVE_W32_SYSTEM*/
|
||
|
||
if (gnupg_chdir (gnupg_daemon_rootdir ()))
|
||
{
|
||
log_error ("chdir to '%s' failed: %s\n",
|
||
gnupg_daemon_rootdir (), strerror (errno));
|
||
exit (1);
|
||
}
|
||
|
||
{
|
||
ctrl_t ctrl;
|
||
|
||
ctrl = xtrycalloc (1, sizeof *ctrl);
|
||
if (!ctrl)
|
||
{
|
||
log_error ("error allocating connection control data: %s\n",
|
||
strerror (errno) );
|
||
kbxd_exit (1);
|
||
}
|
||
kbxd_init_default_ctrl (ctrl);
|
||
/* kbxd_set_database (ctrl, "pubring.kbx", 0); */
|
||
kbxd_set_database (ctrl, "pubring.db", 0);
|
||
kbxd_deinit_default_ctrl (ctrl);
|
||
xfree (ctrl);
|
||
}
|
||
|
||
log_info ("%s %s started\n", gpgrt_strusage(11), gpgrt_strusage(13));
|
||
handle_connections (fd);
|
||
assuan_sock_close (fd);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Exit entry point. This function should be called instead of a
|
||
plain exit. */
|
||
void
|
||
kbxd_exit (int rc)
|
||
{
|
||
/* As usual we run our cleanup handler. */
|
||
cleanup ();
|
||
|
||
/* at this time a bit annoying */
|
||
if ((opt.debug & DBG_MEMSTAT_VALUE))
|
||
gcry_control (GCRYCTL_DUMP_MEMORY_STATS );
|
||
rc = rc? rc : log_get_errorcount(0)? 2 : 0;
|
||
exit (rc);
|
||
}
|
||
|
||
|
||
/* This is our callback function for gcrypt progress messages. It is
|
||
* set once at startup and dispatches progress messages to the
|
||
* corresponding threads of ours. */
|
||
static void
|
||
kbxd_libgcrypt_progress_cb (void *data, const char *what, int printchar,
|
||
int current, int total)
|
||
{
|
||
struct progress_dispatch_s *dispatch;
|
||
npth_t mytid = npth_self ();
|
||
|
||
(void)data;
|
||
|
||
for (dispatch = progress_dispatch_list; dispatch; dispatch = dispatch->next)
|
||
if (dispatch->ctrl && dispatch->tid == mytid)
|
||
break;
|
||
if (dispatch && dispatch->cb)
|
||
dispatch->cb (dispatch->ctrl, what, printchar, current, total);
|
||
}
|
||
|
||
|
||
/* If a progress dispatcher callback has been associated with the
|
||
* current connection unregister it. */
|
||
static void
|
||
unregister_progress_cb (void)
|
||
{
|
||
struct progress_dispatch_s *dispatch;
|
||
npth_t mytid = npth_self ();
|
||
|
||
for (dispatch = progress_dispatch_list; dispatch; dispatch = dispatch->next)
|
||
if (dispatch->ctrl && dispatch->tid == mytid)
|
||
break;
|
||
if (dispatch)
|
||
{
|
||
dispatch->ctrl = NULL;
|
||
dispatch->cb = NULL;
|
||
}
|
||
}
|
||
|
||
|
||
/* Setup a progress callback CB for the current connection. Using a
|
||
* CB of NULL disables the callback. */
|
||
void
|
||
kbxd_set_progress_cb (void (*cb)(ctrl_t ctrl, const char *what,
|
||
int printchar, int current, int total),
|
||
ctrl_t ctrl)
|
||
{
|
||
struct progress_dispatch_s *dispatch, *firstfree;
|
||
npth_t mytid = npth_self ();
|
||
|
||
firstfree = NULL;
|
||
for (dispatch = progress_dispatch_list; dispatch; dispatch = dispatch->next)
|
||
{
|
||
if (dispatch->ctrl && dispatch->tid == mytid)
|
||
break;
|
||
if (!dispatch->ctrl && !firstfree)
|
||
firstfree = dispatch;
|
||
}
|
||
if (!dispatch) /* None allocated: Reuse or allocate a new one. */
|
||
{
|
||
if (firstfree)
|
||
{
|
||
dispatch = firstfree;
|
||
}
|
||
else if ((dispatch = xtrycalloc (1, sizeof *dispatch)))
|
||
{
|
||
dispatch->next = progress_dispatch_list;
|
||
progress_dispatch_list = dispatch;
|
||
}
|
||
else
|
||
{
|
||
log_error ("error allocating new progress dispatcher slot: %s\n",
|
||
gpg_strerror (gpg_error_from_syserror ()));
|
||
return;
|
||
}
|
||
dispatch->ctrl = ctrl;
|
||
dispatch->tid = mytid;
|
||
}
|
||
|
||
dispatch->cb = cb;
|
||
}
|
||
|
||
|
||
/* Each thread has its own local variables conveyed by a control
|
||
* structure usually identified by an argument named CTRL. This
|
||
* function is called immediately after allocating the control
|
||
* structure. Its purpose is to setup the default values for that
|
||
* structure. Note that some values may have already been set. */
|
||
static void
|
||
kbxd_init_default_ctrl (ctrl_t ctrl)
|
||
{
|
||
ctrl->magic = SERVER_CONTROL_MAGIC;
|
||
}
|
||
|
||
|
||
/* Release all resources allocated by default in the control
|
||
structure. This is the counterpart to kbxd_init_default_ctrl. */
|
||
static void
|
||
kbxd_deinit_default_ctrl (ctrl_t ctrl)
|
||
{
|
||
if (!ctrl)
|
||
return;
|
||
kbxd_release_session_info (ctrl);
|
||
ctrl->magic = 0xdeadbeef;
|
||
unregister_progress_cb ();
|
||
xfree (ctrl->lc_messages);
|
||
}
|
||
|
||
|
||
/* Reread parts of the configuration. Note, that this function is
|
||
* obviously not thread-safe and should only be called from the PTH
|
||
* signal handler.
|
||
*
|
||
* Fixme: Due to the way the argument parsing works, we create a
|
||
* memory leak here for all string type arguments. There is currently
|
||
* no clean way to tell whether the memory for the argument has been
|
||
* allocated or points into the process's original arguments. Unless
|
||
* we have a mechanism to tell this, we need to live on with this. */
|
||
static void
|
||
reread_configuration (void)
|
||
{
|
||
gpgrt_argparse_t pargs;
|
||
char *twopart;
|
||
int dummy;
|
||
int logfile_seen = 0;
|
||
|
||
if (!config_filename)
|
||
goto finish; /* No config file. */
|
||
|
||
twopart = strconcat ("keyboxd" EXTSEP_S "conf" PATHSEP_S,
|
||
config_filename, NULL);
|
||
if (!twopart)
|
||
return; /* Out of core. */
|
||
|
||
parse_rereadable_options (NULL, 1); /* Start from the default values. */
|
||
|
||
memset (&pargs, 0, sizeof pargs);
|
||
dummy = 0;
|
||
pargs.argc = &dummy;
|
||
pargs.flags = (ARGPARSE_FLAG_KEEP
|
||
|ARGPARSE_FLAG_SYS
|
||
|ARGPARSE_FLAG_USER);
|
||
while (gpgrt_argparser (&pargs, opts, twopart))
|
||
{
|
||
if (pargs.r_opt == ARGPARSE_CONFFILE)
|
||
{
|
||
log_info (_("reading options from '%s'\n"),
|
||
pargs.r_type? pargs.r.ret_str: "[cmdline]");
|
||
}
|
||
else if (pargs.r_opt < -1)
|
||
pargs.err = ARGPARSE_PRINT_WARNING;
|
||
else /* Try to parse this option - ignore unchangeable ones. */
|
||
{
|
||
if (pargs.r_opt == oLogFile)
|
||
logfile_seen = 1;
|
||
parse_rereadable_options (&pargs, 1);
|
||
}
|
||
}
|
||
gpgrt_argparse (NULL, &pargs, NULL); /* Release internal state. */
|
||
xfree (twopart);
|
||
finalize_rereadable_options ();
|
||
set_debug ();
|
||
|
||
finish:
|
||
/* Get a default log file from common.conf. */
|
||
if (!logfile_seen && !parse_comopt (GNUPG_MODULE_NAME_KEYBOXD, !!opt.debug))
|
||
{
|
||
if (!current_logfile || !comopt.logfile
|
||
|| strcmp (current_logfile, comopt.logfile))
|
||
{
|
||
log_set_file (comopt.logfile);
|
||
xfree (current_logfile);
|
||
current_logfile = comopt.logfile? xtrystrdup (comopt.logfile) : NULL;
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
/* Return the file name of the socket we are using for requests. */
|
||
const char *
|
||
get_kbxd_socket_name (void)
|
||
{
|
||
const char *s = socket_name;
|
||
|
||
return (s && *s)? s : NULL;
|
||
}
|
||
|
||
|
||
/* Return the number of active connections. */
|
||
int
|
||
get_kbxd_active_connection_count (void)
|
||
{
|
||
return active_connections;
|
||
}
|
||
|
||
|
||
/* Create a name for the socket in the home directory as using
|
||
* STANDARD_NAME. We also check for valid characters as well as
|
||
* against a maximum allowed length for a Unix domain socket is done.
|
||
* The function terminates the process in case of an error. The
|
||
* function returns a pointer to an allocated string with the absolute
|
||
* name of the socket used. */
|
||
static char *
|
||
create_socket_name (char *standard_name, int with_homedir)
|
||
{
|
||
char *name;
|
||
|
||
if (with_homedir)
|
||
name = make_filename (gnupg_socketdir (), standard_name, NULL);
|
||
else
|
||
name = make_filename (standard_name, NULL);
|
||
if (strchr (name, PATHSEP_C))
|
||
{
|
||
log_error (("'%s' are not allowed in the socket name\n"), PATHSEP_S);
|
||
kbxd_exit (2);
|
||
}
|
||
return name;
|
||
}
|
||
|
||
|
||
|
||
/* Create a Unix domain socket with NAME. Returns the file descriptor
|
||
* or terminates the process in case of an error. If CYGWIN is set a
|
||
* Cygwin compatible socket is created (Windows only). */
|
||
static gnupg_fd_t
|
||
create_server_socket (char *name, int cygwin, assuan_sock_nonce_t *nonce)
|
||
{
|
||
struct sockaddr *addr;
|
||
struct sockaddr_un *unaddr;
|
||
socklen_t len;
|
||
gnupg_fd_t fd;
|
||
int rc;
|
||
|
||
fd = assuan_sock_new (AF_UNIX, SOCK_STREAM, 0);
|
||
if (fd == ASSUAN_INVALID_FD)
|
||
{
|
||
log_error (_("can't create socket: %s\n"), strerror (errno));
|
||
*name = 0; /* Inhibit removal of the socket by cleanup(). */
|
||
kbxd_exit (2);
|
||
}
|
||
|
||
if (cygwin)
|
||
assuan_sock_set_flag (fd, "cygwin", 1);
|
||
|
||
unaddr = xmalloc (sizeof *unaddr);
|
||
addr = (struct sockaddr*)unaddr;
|
||
|
||
if (assuan_sock_set_sockaddr_un (name, addr, NULL))
|
||
{
|
||
if (errno == ENAMETOOLONG)
|
||
log_error (_("socket name '%s' is too long\n"), name);
|
||
else
|
||
log_error ("error preparing socket '%s': %s\n",
|
||
name, gpg_strerror (gpg_error_from_syserror ()));
|
||
*name = 0; /* Inhibit removal of the socket by cleanup(). */
|
||
xfree (unaddr);
|
||
kbxd_exit (2);
|
||
}
|
||
|
||
len = SUN_LEN (unaddr);
|
||
rc = assuan_sock_bind (fd, addr, len);
|
||
|
||
/* Our error code mapping on W32CE returns EEXIST thus we also test
|
||
for this. */
|
||
if (rc == -1
|
||
&& (errno == EADDRINUSE
|
||
#ifdef HAVE_W32_SYSTEM
|
||
|| errno == EEXIST
|
||
#endif
|
||
))
|
||
{
|
||
/* Check whether a keyboxd is already running. */
|
||
if (!check_for_running_kbxd (1))
|
||
{
|
||
log_set_prefix (NULL, GPGRT_LOG_WITH_PREFIX);
|
||
log_set_file (NULL);
|
||
log_error (_("a keyboxd is already running - "
|
||
"not starting a new one\n"));
|
||
*name = 0; /* Inhibit removal of the socket by cleanup(). */
|
||
assuan_sock_close (fd);
|
||
xfree (unaddr);
|
||
kbxd_exit (2);
|
||
}
|
||
gnupg_remove (unaddr->sun_path);
|
||
rc = assuan_sock_bind (fd, addr, len);
|
||
}
|
||
if (rc != -1 && (rc=assuan_sock_get_nonce (addr, len, nonce)))
|
||
log_error (_("error getting nonce for the socket\n"));
|
||
if (rc == -1)
|
||
{
|
||
/* We use gpg_strerror here because it allows us to get strings
|
||
for some W32 socket error codes. */
|
||
log_error (_("error binding socket to '%s': %s\n"),
|
||
unaddr->sun_path, gpg_strerror (gpg_error_from_syserror ()));
|
||
|
||
assuan_sock_close (fd);
|
||
*name = 0; /* Inhibit removal of the socket by cleanup(). */
|
||
xfree (unaddr);
|
||
kbxd_exit (2);
|
||
}
|
||
|
||
if (gnupg_chmod (unaddr->sun_path, "-rwx"))
|
||
log_error (_("can't set permissions of '%s': %s\n"),
|
||
unaddr->sun_path, strerror (errno));
|
||
|
||
if (listen (FD2INT(fd), listen_backlog ) == -1)
|
||
{
|
||
log_error ("listen(fd,%d) failed: %s\n", listen_backlog, strerror (errno));
|
||
*name = 0; /* Inhibit removal of the socket by cleanup(). */
|
||
assuan_sock_close (fd);
|
||
xfree (unaddr);
|
||
kbxd_exit (2);
|
||
}
|
||
|
||
if (opt.verbose)
|
||
log_info (_("listening on socket '%s'\n"), unaddr->sun_path);
|
||
|
||
xfree (unaddr);
|
||
return fd;
|
||
}
|
||
|
||
|
||
/* Check that the directory for storing the public keys exists and
|
||
* create it if not. This function won't fail as it is only a
|
||
* convenience function and not strictly necessary. */
|
||
static void
|
||
create_public_keys_directory (const char *home)
|
||
{
|
||
char *fname;
|
||
struct stat statbuf;
|
||
|
||
fname = make_filename (home, GNUPG_PUBLIC_KEYS_DIR, NULL);
|
||
if (gnupg_stat (fname, &statbuf) && errno == ENOENT)
|
||
{
|
||
if (gnupg_mkdir (fname, "-rwxr-x"))
|
||
log_error (_("can't create directory '%s': %s\n"),
|
||
fname, strerror (errno) );
|
||
else if (!opt.quiet)
|
||
log_info (_("directory '%s' created\n"), fname);
|
||
}
|
||
if (gnupg_chmod (fname, "-rwxr-x"))
|
||
log_error (_("can't set permissions of '%s': %s\n"),
|
||
fname, strerror (errno));
|
||
xfree (fname);
|
||
}
|
||
|
||
|
||
/* Create the directory only if the supplied directory name is the
|
||
* same as the default one. This way we avoid to create arbitrary
|
||
* directories when a non-default home directory is used. To cope
|
||
* with HOME, we compare only the suffix if we see that the default
|
||
* homedir does start with a tilde. We don't stop here in case of
|
||
* problems because other functions will throw an error anyway.*/
|
||
static void
|
||
create_directories (void)
|
||
{
|
||
struct stat statbuf;
|
||
const char *defhome = standard_homedir ();
|
||
char *home;
|
||
|
||
home = make_filename (gnupg_homedir (), NULL);
|
||
if (gnupg_stat (home, &statbuf))
|
||
{
|
||
if (errno == ENOENT)
|
||
{
|
||
if (
|
||
#ifdef HAVE_W32_SYSTEM
|
||
( !compare_filenames (home, defhome) )
|
||
#else
|
||
(*defhome == '~'
|
||
&& (strlen (home) >= strlen (defhome+1)
|
||
&& !strcmp (home + strlen(home)
|
||
- strlen (defhome+1), defhome+1)))
|
||
|| (*defhome != '~' && !strcmp (home, defhome) )
|
||
#endif
|
||
)
|
||
{
|
||
if (gnupg_mkdir (home, "-rwx"))
|
||
log_error (_("can't create directory '%s': %s\n"),
|
||
home, strerror (errno) );
|
||
else
|
||
{
|
||
if (!opt.quiet)
|
||
log_info (_("directory '%s' created\n"), home);
|
||
}
|
||
}
|
||
}
|
||
else
|
||
log_error (_("stat() failed for '%s': %s\n"), home, strerror (errno));
|
||
}
|
||
else if ( !S_ISDIR(statbuf.st_mode))
|
||
{
|
||
log_error (_("can't use '%s' as home directory\n"), home);
|
||
}
|
||
else /* exists and is a directory. */
|
||
{
|
||
create_public_keys_directory (home);
|
||
}
|
||
xfree (home);
|
||
}
|
||
|
||
|
||
|
||
/* This is the worker for the ticker. It is called every few seconds
|
||
* and may only do fast operations. */
|
||
static void
|
||
handle_tick (void)
|
||
{
|
||
static time_t last_minute;
|
||
struct stat statbuf;
|
||
|
||
if (!last_minute)
|
||
last_minute = time (NULL);
|
||
|
||
/* Code to be run from time to time. */
|
||
#if CHECK_OWN_SOCKET_INTERVAL > 0
|
||
if (last_minute + CHECK_OWN_SOCKET_INTERVAL <= time (NULL))
|
||
{
|
||
check_own_socket ();
|
||
last_minute = time (NULL);
|
||
}
|
||
#endif
|
||
|
||
|
||
/* Check whether the homedir is still available. */
|
||
if (!shutdown_pending
|
||
&& (!have_homedir_inotify || !reliable_homedir_inotify)
|
||
&& gnupg_stat (gnupg_homedir (), &statbuf) && errno == ENOENT)
|
||
{
|
||
shutdown_pending = 1;
|
||
log_info ("homedir has been removed - shutting down\n");
|
||
}
|
||
}
|
||
|
||
|
||
/* A global function which allows us to call the reload stuff from
|
||
* other places too. This is only used when build for W32. */
|
||
void
|
||
kbxd_sighup_action (void)
|
||
{
|
||
log_info ("SIGHUP received - "
|
||
"re-reading configuration and flushing cache\n");
|
||
|
||
reread_configuration ();
|
||
}
|
||
|
||
|
||
/* A helper function to handle SIGUSR2. */
|
||
static void
|
||
kbxd_sigusr2_action (void)
|
||
{
|
||
if (opt.verbose)
|
||
log_info ("SIGUSR2 received - no action\n");
|
||
/* Nothing to do right now. */
|
||
}
|
||
|
||
|
||
#ifndef HAVE_W32_SYSTEM
|
||
/* The signal handler for this program. It is expected to be run in
|
||
* its own thread and not in the context of a signal handler. */
|
||
static void
|
||
handle_signal (int signo)
|
||
{
|
||
switch (signo)
|
||
{
|
||
case SIGHUP:
|
||
kbxd_sighup_action ();
|
||
break;
|
||
|
||
case SIGUSR1:
|
||
log_info ("SIGUSR1 received - printing internal information:\n");
|
||
/* Fixme: We need to see how to integrate pth dumping into our
|
||
logging system. */
|
||
/* pth_ctrl (PTH_CTRL_DUMPSTATE, log_get_stream ()); */
|
||
break;
|
||
|
||
case SIGUSR2:
|
||
kbxd_sigusr2_action ();
|
||
break;
|
||
|
||
case SIGTERM:
|
||
if (!shutdown_pending)
|
||
log_info ("SIGTERM received - shutting down ...\n");
|
||
else
|
||
log_info ("SIGTERM received - still %i open connections\n",
|
||
active_connections);
|
||
shutdown_pending++;
|
||
if (shutdown_pending > 2)
|
||
{
|
||
log_info ("shutdown forced\n");
|
||
log_info ("%s %s stopped\n", gpgrt_strusage(11), gpgrt_strusage(13) );
|
||
cleanup ();
|
||
kbxd_exit (0);
|
||
}
|
||
break;
|
||
|
||
case SIGINT:
|
||
log_info ("SIGINT received - immediate shutdown\n");
|
||
log_info( "%s %s stopped\n", gpgrt_strusage(11), gpgrt_strusage(13));
|
||
cleanup ();
|
||
kbxd_exit (0);
|
||
break;
|
||
|
||
default:
|
||
log_info ("signal %d received - no action defined\n", signo);
|
||
}
|
||
}
|
||
#endif
|
||
|
||
/* Check the nonce on a new connection. This is a NOP unless we
|
||
are using our Unix domain socket emulation under Windows. */
|
||
static int
|
||
check_nonce (ctrl_t ctrl, assuan_sock_nonce_t *nonce)
|
||
{
|
||
if (assuan_sock_check_nonce (ctrl->thread_startup.fd, nonce))
|
||
{
|
||
log_info (_("error reading nonce on fd %d: %s\n"),
|
||
FD2INT(ctrl->thread_startup.fd), strerror (errno));
|
||
assuan_sock_close (ctrl->thread_startup.fd);
|
||
xfree (ctrl);
|
||
return -1;
|
||
}
|
||
else
|
||
return 0;
|
||
}
|
||
|
||
|
||
static void *
|
||
do_start_connection_thread (ctrl_t ctrl)
|
||
{
|
||
static unsigned int last_session_id;
|
||
unsigned int session_id;
|
||
|
||
active_connections++;
|
||
kbxd_init_default_ctrl (ctrl);
|
||
if (opt.verbose && !DBG_IPC)
|
||
log_info (_("handler 0x%lx for fd %d started\n"),
|
||
(unsigned long) npth_self(), FD2INT(ctrl->thread_startup.fd));
|
||
|
||
session_id = ++last_session_id;
|
||
if (!session_id)
|
||
session_id = ++last_session_id;
|
||
kbxd_start_command_handler (ctrl, ctrl->thread_startup.fd, session_id);
|
||
if (opt.verbose && !DBG_IPC)
|
||
log_info (_("handler 0x%lx for fd %d terminated\n"),
|
||
(unsigned long) npth_self(), FD2INT(ctrl->thread_startup.fd));
|
||
|
||
kbxd_deinit_default_ctrl (ctrl);
|
||
xfree (ctrl);
|
||
active_connections--;
|
||
return NULL;
|
||
}
|
||
|
||
|
||
/* This is the standard connection thread's main function. */
|
||
static void *
|
||
start_connection_thread (void *arg)
|
||
{
|
||
ctrl_t ctrl = arg;
|
||
|
||
if (check_nonce (ctrl, &socket_nonce))
|
||
{
|
||
log_error ("handler 0x%lx nonce check FAILED\n",
|
||
(unsigned long) npth_self());
|
||
return NULL;
|
||
}
|
||
|
||
return do_start_connection_thread (ctrl);
|
||
}
|
||
|
||
|
||
/* Connection handler loop. Wait for connection requests and spawn a
|
||
* thread after accepting a connection. */
|
||
static void
|
||
handle_connections (gnupg_fd_t listen_fd)
|
||
{
|
||
gpg_error_t err;
|
||
npth_attr_t tattr;
|
||
struct sockaddr_un paddr;
|
||
socklen_t plen;
|
||
fd_set fdset, read_fdset;
|
||
int ret;
|
||
gnupg_fd_t fd;
|
||
int nfd;
|
||
int saved_errno;
|
||
struct timespec abstime;
|
||
struct timespec curtime;
|
||
struct timespec timeout;
|
||
#ifdef HAVE_W32_SYSTEM
|
||
HANDLE events[2];
|
||
unsigned int events_set;
|
||
#endif
|
||
int sock_inotify_fd = -1;
|
||
int home_inotify_fd = -1;
|
||
struct {
|
||
const char *name;
|
||
void *(*func) (void *arg);
|
||
gnupg_fd_t l_fd;
|
||
} listentbl[] = {
|
||
{ "std", start_connection_thread },
|
||
};
|
||
|
||
|
||
ret = npth_attr_init(&tattr);
|
||
if (ret)
|
||
log_fatal ("error allocating thread attributes: %s\n", strerror (ret));
|
||
npth_attr_setdetachstate (&tattr, NPTH_CREATE_DETACHED);
|
||
|
||
#ifndef HAVE_W32_SYSTEM
|
||
npth_sigev_init ();
|
||
npth_sigev_add (SIGHUP);
|
||
npth_sigev_add (SIGUSR1);
|
||
npth_sigev_add (SIGUSR2);
|
||
npth_sigev_add (SIGINT);
|
||
npth_sigev_add (SIGTERM);
|
||
npth_sigev_fini ();
|
||
#else
|
||
# ifdef HAVE_W32CE_SYSTEM
|
||
/* Use a dummy event. */
|
||
sigs = 0;
|
||
ev = pth_event (PTH_EVENT_SIGS, &sigs, &signo);
|
||
# else
|
||
events[0] = INVALID_HANDLE_VALUE;
|
||
# endif
|
||
#endif
|
||
|
||
if (disable_check_own_socket)
|
||
sock_inotify_fd = -1;
|
||
else if ((err = gnupg_inotify_watch_socket (&sock_inotify_fd, socket_name)))
|
||
{
|
||
if (gpg_err_code (err) != GPG_ERR_NOT_SUPPORTED)
|
||
log_info ("error enabling daemon termination by socket removal: %s\n",
|
||
gpg_strerror (err));
|
||
}
|
||
|
||
if (disable_check_own_socket)
|
||
home_inotify_fd = -1;
|
||
else if ((err = gnupg_inotify_watch_delete_self (&home_inotify_fd,
|
||
gnupg_homedir ())))
|
||
{
|
||
if (gpg_err_code (err) != GPG_ERR_NOT_SUPPORTED)
|
||
log_info ("error enabling daemon termination by homedir removal: %s\n",
|
||
gpg_strerror (err));
|
||
}
|
||
else
|
||
have_homedir_inotify = 1;
|
||
|
||
FD_ZERO (&fdset);
|
||
FD_SET (FD2INT (listen_fd), &fdset);
|
||
nfd = FD2INT (listen_fd);
|
||
if (sock_inotify_fd != -1)
|
||
{
|
||
FD_SET (sock_inotify_fd, &fdset);
|
||
if (sock_inotify_fd > nfd)
|
||
nfd = sock_inotify_fd;
|
||
}
|
||
if (home_inotify_fd != -1)
|
||
{
|
||
FD_SET (home_inotify_fd, &fdset);
|
||
if (home_inotify_fd > nfd)
|
||
nfd = home_inotify_fd;
|
||
}
|
||
|
||
listentbl[0].l_fd = listen_fd;
|
||
|
||
npth_clock_gettime (&abstime);
|
||
abstime.tv_sec += TIMERTICK_INTERVAL;
|
||
|
||
for (;;)
|
||
{
|
||
/* Shutdown test. */
|
||
if (shutdown_pending)
|
||
{
|
||
if (!active_connections)
|
||
break; /* ready */
|
||
|
||
/* Do not accept new connections but keep on running the
|
||
* loop to cope with the timer events.
|
||
*
|
||
* Note that we do not close the listening socket because a
|
||
* client trying to connect to that socket would instead
|
||
* restart a new keyboxd instance - which is unlikely the
|
||
* intention of a shutdown. */
|
||
FD_ZERO (&fdset);
|
||
nfd = -1;
|
||
if (sock_inotify_fd != -1)
|
||
{
|
||
FD_SET (sock_inotify_fd, &fdset);
|
||
nfd = sock_inotify_fd;
|
||
}
|
||
if (home_inotify_fd != -1)
|
||
{
|
||
FD_SET (home_inotify_fd, &fdset);
|
||
if (home_inotify_fd > nfd)
|
||
nfd = home_inotify_fd;
|
||
}
|
||
}
|
||
|
||
read_fdset = fdset;
|
||
|
||
npth_clock_gettime (&curtime);
|
||
if (!(npth_timercmp (&curtime, &abstime, <)))
|
||
{
|
||
/* Timeout. */
|
||
handle_tick ();
|
||
npth_clock_gettime (&abstime);
|
||
abstime.tv_sec += TIMERTICK_INTERVAL;
|
||
}
|
||
npth_timersub (&abstime, &curtime, &timeout);
|
||
|
||
#ifndef HAVE_W32_SYSTEM
|
||
ret = npth_pselect (nfd+1, &read_fdset, NULL, NULL, &timeout,
|
||
npth_sigev_sigmask ());
|
||
saved_errno = errno;
|
||
|
||
{
|
||
int signo;
|
||
while (npth_sigev_get_pending (&signo))
|
||
handle_signal (signo);
|
||
}
|
||
#else
|
||
ret = npth_eselect (nfd+1, &read_fdset, NULL, NULL, &timeout,
|
||
events, &events_set);
|
||
saved_errno = errno;
|
||
|
||
/* This is valid even if npth_eselect returns an error. */
|
||
if ((events_set & 1))
|
||
kbxd_sigusr2_action ();
|
||
#endif
|
||
|
||
if (ret == -1 && saved_errno != EINTR)
|
||
{
|
||
log_error (_("npth_pselect failed: %s - waiting 1s\n"),
|
||
strerror (saved_errno));
|
||
gnupg_sleep (1);
|
||
continue;
|
||
}
|
||
if (ret <= 0)
|
||
{
|
||
/* Interrupt or timeout. Will be handled when calculating the
|
||
* next timeout. */
|
||
continue;
|
||
}
|
||
|
||
/* The inotify fds are set even when a shutdown is pending (see
|
||
* above). So we must handle them in any case. To avoid that
|
||
* they trigger a second time we close them immediately. */
|
||
if (sock_inotify_fd != -1
|
||
&& FD_ISSET (sock_inotify_fd, &read_fdset)
|
||
&& gnupg_inotify_has_name (sock_inotify_fd, KEYBOXD_SOCK_NAME))
|
||
{
|
||
shutdown_pending = 1;
|
||
close (sock_inotify_fd);
|
||
sock_inotify_fd = -1;
|
||
log_info ("socket file has been removed - shutting down\n");
|
||
}
|
||
|
||
if (home_inotify_fd != -1
|
||
&& FD_ISSET (home_inotify_fd, &read_fdset))
|
||
{
|
||
shutdown_pending = 1;
|
||
close (home_inotify_fd);
|
||
home_inotify_fd = -1;
|
||
log_info ("homedir has been removed - shutting down\n");
|
||
}
|
||
|
||
if (!shutdown_pending)
|
||
{
|
||
int idx;
|
||
ctrl_t ctrl;
|
||
npth_t thread;
|
||
|
||
for (idx=0; idx < DIM(listentbl); idx++)
|
||
{
|
||
if (listentbl[idx].l_fd == GNUPG_INVALID_FD)
|
||
continue;
|
||
if (!FD_ISSET (FD2INT (listentbl[idx].l_fd), &read_fdset))
|
||
continue;
|
||
|
||
plen = sizeof paddr;
|
||
fd = INT2FD (npth_accept (FD2INT(listentbl[idx].l_fd),
|
||
(struct sockaddr *)&paddr, &plen));
|
||
if (fd == GNUPG_INVALID_FD)
|
||
{
|
||
log_error ("accept failed for %s: %s\n",
|
||
listentbl[idx].name, strerror (errno));
|
||
}
|
||
else if ( !(ctrl = xtrycalloc (1, sizeof *ctrl)))
|
||
{
|
||
log_error ("error allocating connection data for %s: %s\n",
|
||
listentbl[idx].name, strerror (errno) );
|
||
assuan_sock_close (fd);
|
||
}
|
||
else
|
||
{
|
||
ctrl->thread_startup.fd = fd;
|
||
ret = npth_create (&thread, &tattr,
|
||
listentbl[idx].func, ctrl);
|
||
if (ret)
|
||
{
|
||
log_error ("error spawning connection handler for %s:"
|
||
" %s\n", listentbl[idx].name, strerror (ret));
|
||
assuan_sock_close (fd);
|
||
xfree (ctrl);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
if (sock_inotify_fd != -1)
|
||
close (sock_inotify_fd);
|
||
if (home_inotify_fd != -1)
|
||
close (home_inotify_fd);
|
||
cleanup ();
|
||
log_info (_("%s %s stopped\n"), gpgrt_strusage(11), gpgrt_strusage(13));
|
||
npth_attr_destroy (&tattr);
|
||
}
|
||
|
||
|
||
|
||
/* Helper for check_own_socket. */
|
||
static gpg_error_t
|
||
check_own_socket_pid_cb (void *opaque, const void *buffer, size_t length)
|
||
{
|
||
membuf_t *mb = opaque;
|
||
put_membuf (mb, buffer, length);
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* The thread running the actual check. We need to run this in a
|
||
* separate thread so that check_own_thread can be called from the
|
||
* timer tick. */
|
||
static void *
|
||
check_own_socket_thread (void *arg)
|
||
{
|
||
int rc;
|
||
char *sockname = arg;
|
||
assuan_context_t ctx = NULL;
|
||
membuf_t mb;
|
||
char *buffer;
|
||
|
||
check_own_socket_running++;
|
||
|
||
rc = assuan_new (&ctx);
|
||
if (rc)
|
||
{
|
||
log_error ("can't allocate assuan context: %s\n", gpg_strerror (rc));
|
||
goto leave;
|
||
}
|
||
assuan_set_flag (ctx, ASSUAN_NO_LOGGING, 1);
|
||
|
||
rc = assuan_socket_connect (ctx, sockname, (pid_t)(-1), 0);
|
||
if (rc)
|
||
{
|
||
log_error ("can't connect my own socket: %s\n", gpg_strerror (rc));
|
||
goto leave;
|
||
}
|
||
|
||
init_membuf (&mb, 100);
|
||
rc = assuan_transact (ctx, "GETINFO pid", check_own_socket_pid_cb, &mb,
|
||
NULL, NULL, NULL, NULL);
|
||
put_membuf (&mb, "", 1);
|
||
buffer = get_membuf (&mb, NULL);
|
||
if (rc || !buffer)
|
||
{
|
||
log_error ("sending command \"%s\" to my own socket failed: %s\n",
|
||
"GETINFO pid", gpg_strerror (rc));
|
||
rc = 1;
|
||
}
|
||
else if ( (pid_t)strtoul (buffer, NULL, 10) != getpid ())
|
||
{
|
||
log_error ("socket is now serviced by another server\n");
|
||
rc = 1;
|
||
}
|
||
else if (opt.verbose > 1)
|
||
log_error ("socket is still served by this server\n");
|
||
|
||
xfree (buffer);
|
||
|
||
leave:
|
||
xfree (sockname);
|
||
if (ctx)
|
||
assuan_release (ctx);
|
||
if (rc)
|
||
{
|
||
/* We may not remove the socket as it is now in use by another
|
||
* server. */
|
||
inhibit_socket_removal = 1;
|
||
shutdown_pending = 2;
|
||
log_info ("this process is useless - shutting down\n");
|
||
}
|
||
check_own_socket_running--;
|
||
return NULL;
|
||
}
|
||
|
||
|
||
/* Check whether we are still listening on our own socket. In case
|
||
* another keyboxd process started after us has taken ownership of our
|
||
* socket, we would linger around without any real task. Thus we
|
||
* better check once in a while whether we are really needed. */
|
||
static void
|
||
check_own_socket (void)
|
||
{
|
||
char *sockname;
|
||
npth_t thread;
|
||
npth_attr_t tattr;
|
||
int err;
|
||
|
||
if (disable_check_own_socket)
|
||
return;
|
||
|
||
if (check_own_socket_running || shutdown_pending)
|
||
return; /* Still running or already shutting down. */
|
||
|
||
sockname = make_filename_try (gnupg_socketdir (), KEYBOXD_SOCK_NAME, NULL);
|
||
if (!sockname)
|
||
return; /* Out of memory. */
|
||
|
||
err = npth_attr_init (&tattr);
|
||
if (err)
|
||
{
|
||
xfree (sockname);
|
||
return;
|
||
}
|
||
npth_attr_setdetachstate (&tattr, NPTH_CREATE_DETACHED);
|
||
err = npth_create (&thread, &tattr, check_own_socket_thread, sockname);
|
||
if (err)
|
||
log_error ("error spawning check_own_socket_thread: %s\n", strerror (err));
|
||
npth_attr_destroy (&tattr);
|
||
}
|
||
|
||
|
||
|
||
/* Figure out whether a keyboxd is available and running. Prints an
|
||
* error if not. If SILENT is true, no messages are printed. Returns
|
||
* 0 if the agent is running. */
|
||
static int
|
||
check_for_running_kbxd (int silent)
|
||
{
|
||
gpg_error_t err;
|
||
char *sockname;
|
||
assuan_context_t ctx = NULL;
|
||
|
||
sockname = make_filename_try (gnupg_socketdir (), KEYBOXD_SOCK_NAME, NULL);
|
||
if (!sockname)
|
||
return gpg_error_from_syserror ();
|
||
|
||
err = assuan_new (&ctx);
|
||
if (!err)
|
||
err = assuan_socket_connect (ctx, sockname, (pid_t)(-1), 0);
|
||
xfree (sockname);
|
||
if (err)
|
||
{
|
||
if (!silent)
|
||
log_error (_("no keyboxd running in this session\n"));
|
||
|
||
if (ctx)
|
||
assuan_release (ctx);
|
||
return -1;
|
||
}
|
||
|
||
if (!opt.quiet && !silent)
|
||
log_info ("keyboxd running and available\n");
|
||
|
||
assuan_release (ctx);
|
||
return 0;
|
||
}
|