mirror of
git://git.gnupg.org/gnupg.git
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1293 lines
35 KiB
C
1293 lines
35 KiB
C
/* tpm2daemon.c - The GnuPG tpm2 Daemon
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* Copyright (C) 2001-2002, 2004-2005, 2007-2009 Free Software Foundation, Inc.
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* Copyright (C) 2001-2002, 2004-2005, 2007-2014 Werner Koch
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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-or-later
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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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#ifndef 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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#include <signal.h>
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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 "tpm2daemon.h"
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#include <gcrypt.h>
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#include <assuan.h> /* malloc hooks */
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#include "../common/i18n.h"
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#include "../common/sysutils.h"
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#include "../common/gc-opt-flags.h"
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#include "../common/asshelp.h"
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#include "../common/exechelp.h"
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#include "../common/init.h"
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#ifndef ENAMETOOLONG
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# define ENAMETOOLONG EINVAL
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#endif
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enum cmd_and_opt_values
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{ aNull = 0,
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oCsh = 'c',
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oQuiet = 'q',
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oSh = 's',
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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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oDebugLevel,
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oDebugWait,
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oDebugAllowCoreDump,
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oDebugLogTid,
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oDebugAssuanLogCats,
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oNoGreeting,
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oNoOptions,
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oHomedir,
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oNoDetach,
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oNoGrab,
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oLogFile,
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oServer,
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oMultiServer,
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oDaemon,
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oListenBacklog,
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oParent
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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_group (301, N_("@Options:\n ")),
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ARGPARSE_s_n (oServer,"server", N_("run in server mode (foreground)")),
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ARGPARSE_s_n (oMultiServer, "multi-server",
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N_("run in multi server mode (foreground)")),
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ARGPARSE_s_n (oDaemon, "daemon", N_("run in daemon mode (background)")),
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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_n (oSh, "sh", N_("sh-style command output")),
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ARGPARSE_s_n (oCsh, "csh", N_("csh-style command output")),
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ARGPARSE_s_s (oOptions, "options", N_("|FILE|read options from FILE")),
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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_s (oDebugLevel, "debug-level" ,
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N_("|LEVEL|set the debugging level to LEVEL")),
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ARGPARSE_s_i (oDebugWait, "debug-wait", "@"),
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ARGPARSE_s_n (oDebugAllowCoreDump, "debug-allow-core-dump", "@"),
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ARGPARSE_s_n (oDebugLogTid, "debug-log-tid", "@"),
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ARGPARSE_p_u (oDebugAssuanLogCats, "debug-assuan-log-cats", "@"),
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ARGPARSE_s_n (oNoDetach, "no-detach", N_("do not detach from the console")),
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ARGPARSE_s_s (oLogFile, "log-file", N_("|FILE|write a log to FILE")),
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ARGPARSE_s_s (oHomedir, "homedir", "@"),
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ARGPARSE_s_i (oListenBacklog, "listen-backlog", "@"),
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ARGPARSE_p_u (oParent, "tpm2-parent",
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N_("Specify tpm2 parent for key")),
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ARGPARSE_end ()
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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_IPC_VALUE , "ipc" },
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{ 0, NULL }
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};
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/* The timer tick used to check card removal.
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We poll every 500ms to let the user immediately know a status
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change.
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For a card reader with an interrupt endpoint, this timer is not
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used with the internal CCID driver.
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This is not too good for power saving but given that there is no
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easy way to block on card status changes it is the best we can do.
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For PC/SC we could in theory use an extra thread to wait for status
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changes but that requires a native thread because there is no way
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to make the underlying PC/SC card change function block using a Npth
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mechanism. Given that a native thread could only be used under W32
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we don't do that at all. */
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#define TIMERTICK_INTERVAL_SEC (0)
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#define TIMERTICK_INTERVAL_USEC (500000)
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/* Flag to indicate that a shutdown was requested. */
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static int shutdown_pending;
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/* It is possible that we are currently running under setuid permissions */
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static int maybe_setuid = 1;
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/* Flag telling whether we are running as a pipe server. */
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static int pipe_server;
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/* Name of the communication socket */
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static char *socket_name;
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/* Name of the redirected socket or NULL. */
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static char *redir_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. Change at runtime with
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* --listen-backlog. */
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static int listen_backlog = 64;
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#ifdef HAVE_W32_SYSTEM
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static HANDLE the_event;
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#else
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/* PID to notify update of usb devices. */
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static pid_t main_thread_pid;
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#endif
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#ifdef HAVE_PSELECT_NO_EINTR
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/* FD to notify changes. */
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static int notify_fd;
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#endif
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static char *create_socket_name (char *standard_name);
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static gnupg_fd_t create_server_socket (const char *name,
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char **r_redir_name,
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assuan_sock_nonce_t *nonce);
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static void *start_connection_thread (void *arg);
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static void handle_connections (gnupg_fd_t listen_fd);
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/* Pth wrapper function definitions. */
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ASSUAN_SYSTEM_NPTH_IMPL;
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static int active_connections;
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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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const char *s;
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char *result;
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if (maybe_setuid)
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{
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gcry_control (GCRYCTL_INIT_SECMEM, 0, 0); /* Drop setuid. */
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maybe_setuid = 0;
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}
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s = getfnc (NULL);
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result = xmalloc (strlen (libname) + 1 + strlen (s) + 1);
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strcpy (stpcpy (stpcpy (result, libname), " "), s);
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return result;
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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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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 11: p = "@TPM2DAEMON@ (@GNUPG@)";
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break;
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case 13: p = VERSION; break;
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case 17: p = PRINTABLE_OS_NAME; break;
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case 19: p = _("Please report bugs to <@EMAIL@>.\n"); break;
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case 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: @TPM2DAEMON@ [options] (-h for help)");
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break;
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case 41: p = _("Syntax: tpm2daemon [options] [command [args]]\n"
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"TPM2 daemon 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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static int
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tid_log_callback (unsigned long *rvalue)
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{
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int len = sizeof (*rvalue);
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npth_t thread;
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thread = npth_self ();
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if (sizeof (thread) < len)
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len = sizeof (thread);
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memcpy (rvalue, &thread, len);
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return 2; /* Use use hex representation. */
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}
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/* Setup the debugging. With a LEVEL of NULL only the active debug
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flags are propagated to the subsystems. With LEVEL set, a specific
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set of debug flags is set; thus overriding all flags already
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set. */
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static void
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set_debug (const char *level)
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{
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int numok = (level && digitp (level));
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int numlvl = numok? atoi (level) : 0;
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if (!level)
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;
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else if (!strcmp (level, "none") || (numok && numlvl < 1))
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opt.debug = 0;
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else if (!strcmp (level, "basic") || (numok && numlvl <= 2))
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opt.debug = DBG_IPC_VALUE;
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else if (!strcmp (level, "advanced") || (numok && numlvl <= 5))
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opt.debug = DBG_IPC_VALUE;
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else if (!strcmp (level, "expert") || (numok && numlvl <= 8))
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opt.debug = DBG_IPC_VALUE;
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else if (!strcmp (level, "guru") || numok)
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opt.debug = ~0;
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else
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{
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log_error (_("invalid debug-level '%s' given\n"), level);
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tpm2d_exit (2);
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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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static void
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cleanup (void)
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{
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if (socket_name && *socket_name)
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{
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char *name;
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name = redir_socket_name? redir_socket_name : socket_name;
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gnupg_remove (name);
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*socket_name = 0;
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}
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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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gpgrt_argparse_t pargs;
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int orig_argc;
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char **orig_argv;
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char *last_configname = NULL;
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const char *configname = NULL;
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const char *shell;
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int parse_debug = 0;
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const char *debug_level = NULL;
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int greeting = 0;
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int nogreeting = 0;
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int multi_server = 0;
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int is_daemon = 0;
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int nodetach = 0;
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int csh_style = 0;
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char *logfile = NULL;
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int debug_wait = 0;
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int gpgconf_list = 0;
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char *config_filename = NULL;
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int allow_coredump = 0;
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struct assuan_malloc_hooks malloc_hooks;
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int res;
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npth_t pipecon_handler;
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early_system_init ();
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gpgrt_set_strusage (my_strusage);
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gcry_control (GCRYCTL_SUSPEND_SECMEM_WARN);
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/* Please note that we may running SUID(ROOT), so be very CAREFUL
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when adding any stuff between here and the call to INIT_SECMEM()
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somewhere after the option parsing */
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log_set_prefix ("tpm2daemon", GPGRT_LOG_WITH_PREFIX | GPGRT_LOG_WITH_PID);
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/* Make sure that our subsystems are ready. */
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i18n_init ();
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init_common_subsystems (&argc, &argv);
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malloc_hooks.malloc = gcry_malloc;
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malloc_hooks.realloc = gcry_realloc;
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malloc_hooks.free = gcry_free;
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assuan_set_malloc_hooks (&malloc_hooks);
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assuan_set_gpg_err_source (GPG_ERR_SOURCE_DEFAULT);
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assuan_set_system_hooks (ASSUAN_SYSTEM_NPTH);
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assuan_sock_init ();
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setup_libassuan_logging (&opt.debug, NULL);
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setup_libgcrypt_logging ();
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gcry_control (GCRYCTL_USE_SECURE_RNDPOOL);
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disable_core_dumps ();
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/* Set default options. */
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opt.parent = 0; /* 0 means TPM uses default */
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shell = getenv ("SHELL");
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if (shell && strlen (shell) >= 3 && !strcmp (shell+strlen (shell)-3, "csh") )
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csh_style = 1;
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/* Check whether we have a config file on the commandline */
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orig_argc = argc;
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orig_argv = argv;
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pargs.argc = &argc;
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pargs.argv = &argv;
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pargs.flags= (ARGPARSE_FLAG_KEEP | ARGPARSE_FLAG_NOVERSION);
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while (gpgrt_argparse (NULL, &pargs, opts))
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{
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switch (pargs.r_opt)
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{
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case oDebug:
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case oDebugAll:
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parse_debug++;
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break;
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case oHomedir:
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gnupg_set_homedir (pargs.r.ret_str);
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break;
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}
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}
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/* Reset the flags. */
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pargs.flags &= ~(ARGPARSE_FLAG_KEEP | ARGPARSE_FLAG_NOVERSION);
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/* initialize the secure memory. */
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gcry_control (GCRYCTL_INIT_SECMEM, 16384, 0);
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maybe_setuid = 0;
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||
|
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/*
|
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Now we are working under our real uid
|
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*/
|
||
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||
|
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/* The configuraton directories for use by gpgrt_argparser. */
|
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gpgrt_set_confdir (GPGRT_CONFDIR_SYS, gnupg_sysconfdir ());
|
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gpgrt_set_confdir (GPGRT_CONFDIR_USER, gnupg_homedir ());
|
||
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||
/* We are re-using the struct, thus the reset flag. We OR the
|
||
* flags so that the internal intialized flag won't be cleared. */
|
||
argc = orig_argc;
|
||
argv = orig_argv;
|
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pargs.argc = &argc;
|
||
pargs.argv = &argv;
|
||
pargs.flags |= (ARGPARSE_FLAG_RESET
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| ARGPARSE_FLAG_KEEP
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||
| ARGPARSE_FLAG_SYS
|
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| ARGPARSE_FLAG_USER);
|
||
while (gpgrt_argparser (&pargs, opts, TPM2DAEMON_NAME EXTSEP_S "conf"))
|
||
{
|
||
switch (pargs.r_opt)
|
||
{
|
||
case ARGPARSE_CONFFILE:
|
||
if (parse_debug)
|
||
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;
|
||
break;
|
||
|
||
case aGPGConfList: gpgconf_list = 1; break;
|
||
case aGPGConfTest: gpgconf_list = 2; break;
|
||
case oQuiet: opt.quiet = 1; break;
|
||
case oVerbose: opt.verbose++; break;
|
||
|
||
case oDebug:
|
||
if (parse_debug_flag (pargs.r.ret_str, &opt.debug, debug_flags))
|
||
{
|
||
pargs.r_opt = ARGPARSE_INVALID_ARG;
|
||
pargs.err = ARGPARSE_PRINT_ERROR;
|
||
}
|
||
break;
|
||
case oDebugAll: opt.debug = ~0; break;
|
||
case oDebugLevel: debug_level = pargs.r.ret_str; break;
|
||
case oDebugWait: debug_wait = pargs.r.ret_int; break;
|
||
case oDebugAllowCoreDump:
|
||
enable_core_dumps ();
|
||
allow_coredump = 1;
|
||
break;
|
||
case oDebugLogTid:
|
||
log_set_pid_suffix_cb (tid_log_callback);
|
||
break;
|
||
case oDebugAssuanLogCats:
|
||
set_libassuan_log_cats (pargs.r.ret_ulong);
|
||
break;
|
||
|
||
case oNoGreeting: nogreeting = 1; 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 oCsh: csh_style = 1; break;
|
||
case oSh: csh_style = 0; break;
|
||
case oServer: pipe_server = 1; break;
|
||
case oMultiServer: pipe_server = 1; multi_server = 1; break;
|
||
case oDaemon: is_daemon = 1; break;
|
||
|
||
case oListenBacklog:
|
||
listen_backlog = pargs.r.ret_int;
|
||
break;
|
||
|
||
case oParent:
|
||
opt.parent = pargs.r.ret_ulong;
|
||
break;
|
||
|
||
default:
|
||
if (configname)
|
||
pargs.err = ARGPARSE_PRINT_WARNING;
|
||
else
|
||
pargs.err = ARGPARSE_PRINT_ERROR;
|
||
break;
|
||
}
|
||
}
|
||
gpgrt_argparse (NULL, &pargs, NULL); /* Release internal state. */
|
||
|
||
if (!last_configname)
|
||
config_filename = gpgrt_fnameconcat (gnupg_homedir (),
|
||
TPM2DAEMON_NAME EXTSEP_S "conf",
|
||
NULL);
|
||
else
|
||
{
|
||
config_filename = last_configname;
|
||
last_configname = NULL;
|
||
}
|
||
|
||
if (log_get_errorcount (0))
|
||
exit (2);
|
||
if (nogreeting )
|
||
greeting = 0;
|
||
|
||
if (greeting)
|
||
{
|
||
es_fprintf (es_stderr, "%s %s; %s\n",
|
||
gpgrt_strusage (11), gpgrt_strusage (13),
|
||
gpgrt_strusage (14) );
|
||
es_fprintf (es_stderr, "%s\n", gpgrt_strusage (15) );
|
||
}
|
||
#ifdef IS_DEVELOPMENT_VERSION
|
||
log_info ("NOTE: this is a development version!\n");
|
||
#endif
|
||
|
||
/* 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]);
|
||
}
|
||
|
||
if (atexit (cleanup))
|
||
{
|
||
log_error ("atexit failed\n");
|
||
cleanup ();
|
||
exit (1);
|
||
}
|
||
|
||
set_debug (debug_level);
|
||
|
||
if (gpgconf_list == 2)
|
||
tpm2d_exit (0);
|
||
if (gpgconf_list)
|
||
{
|
||
es_printf ("verbose:%lu:\n"
|
||
"quiet:%lu:\n"
|
||
"debug-level:%lu:\"none:\n"
|
||
"log-file:%lu:\n",
|
||
GC_OPT_FLAG_NONE,
|
||
GC_OPT_FLAG_NONE,
|
||
GC_OPT_FLAG_DEFAULT,
|
||
GC_OPT_FLAG_NONE );
|
||
|
||
tpm2d_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);
|
||
}
|
||
|
||
if (debug_wait && pipe_server)
|
||
{
|
||
log_debug ("waiting for debugger - my pid is %u .....\n",
|
||
(unsigned int)getpid ());
|
||
gnupg_sleep (debug_wait);
|
||
log_debug ("... okay\n");
|
||
}
|
||
|
||
if (pipe_server)
|
||
{
|
||
/* This is the simple pipe based server */
|
||
ctrl_t ctrl;
|
||
npth_attr_t tattr;
|
||
gnupg_fd_t fd = GNUPG_INVALID_FD;
|
||
|
||
#ifndef HAVE_W32_SYSTEM
|
||
{
|
||
struct sigaction sa;
|
||
|
||
sa.sa_handler = SIG_IGN;
|
||
sigemptyset (&sa.sa_mask);
|
||
sa.sa_flags = 0;
|
||
sigaction (SIGPIPE, &sa, NULL);
|
||
}
|
||
#endif
|
||
|
||
npth_init ();
|
||
gpgrt_set_syscall_clamp (npth_unprotect, npth_protect);
|
||
|
||
/* If --debug-allow-core-dump has been given we also need to
|
||
switch the working directory to a place where we can actually
|
||
write. */
|
||
if (allow_coredump)
|
||
{
|
||
if (chdir ("/tmp"))
|
||
log_debug ("chdir to '/tmp' failed: %s\n", strerror (errno));
|
||
else
|
||
log_debug ("changed working directory to '/tmp'\n");
|
||
}
|
||
|
||
/* In multi server mode we need to listen on an additional
|
||
socket. Create that socket now before starting the handler
|
||
for the pipe connection. This allows that handler to send
|
||
back the name of that socket. */
|
||
if (multi_server)
|
||
{
|
||
socket_name = create_socket_name (TPM2DAEMON_SOCK_NAME);
|
||
fd = create_server_socket (socket_name,
|
||
&redir_socket_name,
|
||
&socket_nonce);
|
||
}
|
||
|
||
res = npth_attr_init (&tattr);
|
||
if (res)
|
||
{
|
||
log_error ("error allocating thread attributes: %s\n",
|
||
strerror (res));
|
||
tpm2d_exit (2);
|
||
}
|
||
npth_attr_setdetachstate (&tattr, NPTH_CREATE_DETACHED);
|
||
|
||
ctrl = xtrycalloc (1, sizeof *ctrl);
|
||
if ( !ctrl )
|
||
{
|
||
log_error ("error allocating connection control data: %s\n",
|
||
strerror (errno) );
|
||
tpm2d_exit (2);
|
||
}
|
||
ctrl->thread_startup.fd = GNUPG_INVALID_FD;
|
||
res = npth_create (&pipecon_handler, &tattr, start_connection_thread, ctrl);
|
||
if (res)
|
||
{
|
||
log_error ("error spawning pipe connection handler: %s\n",
|
||
strerror (res) );
|
||
xfree (ctrl);
|
||
tpm2d_exit (2);
|
||
}
|
||
npth_setname_np (pipecon_handler, "pipe-connection");
|
||
npth_attr_destroy (&tattr);
|
||
|
||
/* We run handle_connection to wait for the shutdown signal and
|
||
to run the ticker stuff. */
|
||
handle_connections (fd);
|
||
if (fd != GNUPG_INVALID_FD)
|
||
assuan_sock_close (fd);
|
||
}
|
||
else if (!is_daemon)
|
||
{
|
||
log_info (_("please use the option '--daemon'"
|
||
" to run the program in the background\n"));
|
||
}
|
||
else
|
||
{ /* Regular server mode */
|
||
gnupg_fd_t fd;
|
||
#ifndef HAVE_W32_SYSTEM
|
||
pid_t pid;
|
||
int i;
|
||
#endif
|
||
|
||
/* Create the socket. */
|
||
socket_name = create_socket_name (TPM2DAEMON_SOCK_NAME);
|
||
fd = create_server_socket (socket_name,
|
||
&redir_socket_name, &socket_nonce);
|
||
|
||
|
||
fflush (NULL);
|
||
#ifdef HAVE_W32_SYSTEM
|
||
(void)csh_style;
|
||
(void)nodetach;
|
||
#else
|
||
pid = fork ();
|
||
if (pid == (pid_t)-1)
|
||
{
|
||
log_fatal ("fork failed: %s\n", strerror (errno) );
|
||
exit (1);
|
||
}
|
||
else if (pid)
|
||
{ /* we are the parent */
|
||
char *infostr;
|
||
|
||
close (fd);
|
||
|
||
/* create the info string: <name>:<pid>:<protocol_version> */
|
||
if (gpgrt_asprintf (&infostr, "TPM2DAEMON_INFO=%s:%lu:1",
|
||
socket_name, (ulong) pid) < 0)
|
||
{
|
||
log_error ("out of core\n");
|
||
kill (pid, SIGTERM);
|
||
exit (1);
|
||
}
|
||
*socket_name = 0; /* don't let cleanup() remove the socket -
|
||
the child should do this from now on */
|
||
if (argc)
|
||
{ /* run the program given on the commandline */
|
||
if (putenv (infostr))
|
||
{
|
||
log_error ("failed to set environment: %s\n",
|
||
strerror (errno) );
|
||
kill (pid, SIGTERM );
|
||
exit (1);
|
||
}
|
||
execvp (argv[0], argv);
|
||
log_error ("failed to run the command: %s\n", strerror (errno));
|
||
kill (pid, SIGTERM);
|
||
exit (1);
|
||
}
|
||
else
|
||
{
|
||
/* Print the environment string, so that the caller can use
|
||
shell's eval to set it */
|
||
if (csh_style)
|
||
{
|
||
*strchr (infostr, '=') = ' ';
|
||
es_printf ( "setenv %s;\n", infostr);
|
||
}
|
||
else
|
||
{
|
||
es_printf ( "%s; export TPM2DAEMON_INFO;\n", infostr);
|
||
}
|
||
xfree (infostr);
|
||
exit (0);
|
||
}
|
||
/* NOTREACHED */
|
||
} /* end parent */
|
||
|
||
/* This is the child. */
|
||
|
||
npth_init ();
|
||
gpgrt_set_syscall_clamp (npth_unprotect, npth_protect);
|
||
|
||
/* Detach from tty and put process into a new session. */
|
||
if (!nodetach )
|
||
{
|
||
/* 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);
|
||
}
|
||
}
|
||
|
||
{
|
||
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);
|
||
}
|
||
|
||
handle_connections (fd);
|
||
|
||
assuan_sock_close (fd);
|
||
}
|
||
|
||
xfree (config_filename);
|
||
return 0;
|
||
}
|
||
|
||
void
|
||
tpm2d_exit (int rc)
|
||
{
|
||
gcry_control (GCRYCTL_TERM_SECMEM );
|
||
rc = rc? rc : log_get_errorcount (0)? 2 : 0;
|
||
exit (rc);
|
||
}
|
||
|
||
|
||
static void
|
||
tpm2d_init_default_ctrl (ctrl_t ctrl)
|
||
{
|
||
(void)ctrl;
|
||
}
|
||
|
||
static void
|
||
tpm2d_deinit_default_ctrl (ctrl_t ctrl)
|
||
{
|
||
if (!ctrl)
|
||
return;
|
||
xfree (ctrl->in_data.value);
|
||
ctrl->in_data.value = NULL;
|
||
ctrl->in_data.valuelen = 0;
|
||
}
|
||
|
||
|
||
/* Return the name of the socket to be used to connect to this
|
||
process. If no socket is available, return NULL. */
|
||
const char *
|
||
tpm2d_get_socket_name (void)
|
||
{
|
||
if (socket_name && *socket_name)
|
||
return socket_name;
|
||
return NULL;
|
||
}
|
||
|
||
|
||
#ifndef HAVE_W32_SYSTEM
|
||
static void
|
||
handle_signal (int signo)
|
||
{
|
||
switch (signo)
|
||
{
|
||
case SIGHUP:
|
||
log_info ("SIGHUP received - "
|
||
"re-reading configuration\n");
|
||
/* reread_configuration (); */
|
||
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 ()); */
|
||
#if 0
|
||
app_dump_state ();
|
||
#endif
|
||
break;
|
||
|
||
case SIGUSR2:
|
||
log_info ("SIGUSR2 received - no action defined\n");
|
||
break;
|
||
|
||
case SIGCONT:
|
||
/* Nothing. */
|
||
log_debug ("SIGCONT received - breaking select\n");
|
||
break;
|
||
|
||
case SIGTERM:
|
||
if (!shutdown_pending)
|
||
log_info ("SIGTERM received - shutting down ...\n");
|
||
else
|
||
log_info ("SIGTERM received - still %i running threads\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 ();
|
||
tpm2d_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 ();
|
||
tpm2d_exit (0);
|
||
break;
|
||
|
||
default:
|
||
log_info ("signal %d received - no action defined\n", signo);
|
||
}
|
||
}
|
||
#endif /*!HAVE_W32_SYSTEM*/
|
||
|
||
|
||
/* Create a name for the socket. We 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.
|
||
Retunrs: Pointer to an allcoated string with the absolute name of
|
||
the socket used. */
|
||
static char *
|
||
create_socket_name (char *standard_name)
|
||
{
|
||
char *name;
|
||
|
||
name = make_filename (gnupg_socketdir (), standard_name, NULL);
|
||
if (strchr (name, PATHSEP_C))
|
||
{
|
||
log_error (("'%s' are not allowed in the socket name\n"), PATHSEP_S);
|
||
tpm2d_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 the socket has
|
||
been redirected the name of the real socket is stored as a malloced
|
||
string at R_REDIR_NAME. */
|
||
static gnupg_fd_t
|
||
create_server_socket (const char *name, char **r_redir_name,
|
||
assuan_sock_nonce_t *nonce)
|
||
{
|
||
struct sockaddr *addr;
|
||
struct sockaddr_un *unaddr;
|
||
socklen_t len;
|
||
gnupg_fd_t fd;
|
||
int rc;
|
||
|
||
xfree (*r_redir_name);
|
||
*r_redir_name = NULL;
|
||
|
||
fd = assuan_sock_new (AF_UNIX, SOCK_STREAM, 0);
|
||
if (fd == GNUPG_INVALID_FD)
|
||
{
|
||
log_error (_("can't create socket: %s\n"), strerror (errno));
|
||
tpm2d_exit (2);
|
||
}
|
||
|
||
unaddr = xmalloc (sizeof (*unaddr));
|
||
addr = (struct sockaddr*)unaddr;
|
||
|
||
{
|
||
int redirected;
|
||
|
||
if (assuan_sock_set_sockaddr_un (name, addr, &redirected))
|
||
{
|
||
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 ()));
|
||
tpm2d_exit (2);
|
||
}
|
||
if (redirected)
|
||
{
|
||
*r_redir_name = xstrdup (unaddr->sun_path);
|
||
if (opt.verbose)
|
||
log_info ("redirecting socket '%s' to '%s'\n", name, *r_redir_name);
|
||
}
|
||
}
|
||
|
||
len = SUN_LEN (unaddr);
|
||
|
||
rc = assuan_sock_bind (fd, addr, len);
|
||
if (rc == -1 && errno == EADDRINUSE)
|
||
{
|
||
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)
|
||
{
|
||
log_error (_("error binding socket to '%s': %s\n"),
|
||
unaddr->sun_path,
|
||
gpg_strerror (gpg_error_from_syserror ()));
|
||
assuan_sock_close (fd);
|
||
tpm2d_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, gpg_strerror (gpg_error_from_syserror ()));
|
||
assuan_sock_close (fd);
|
||
tpm2d_exit (2);
|
||
}
|
||
|
||
if (opt.verbose)
|
||
log_info (_("listening on socket '%s'\n"), unaddr->sun_path);
|
||
|
||
return fd;
|
||
}
|
||
|
||
|
||
|
||
/* This is the standard connection thread's main function. */
|
||
static void *
|
||
start_connection_thread (void *arg)
|
||
{
|
||
ctrl_t ctrl = arg;
|
||
|
||
if (ctrl->thread_startup.fd != GNUPG_INVALID_FD
|
||
&& assuan_sock_check_nonce (ctrl->thread_startup.fd, &socket_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 NULL;
|
||
}
|
||
|
||
active_connections++;
|
||
|
||
tpm2d_init_default_ctrl (ctrl);
|
||
if (opt.verbose)
|
||
log_info (_("handler for fd %d started\n"),
|
||
FD2INT (ctrl->thread_startup.fd));
|
||
|
||
/* If this is a pipe server, we request a shutdown if the command
|
||
handler asked for it. With the next ticker event and given that
|
||
no other connections are running the shutdown will then
|
||
happen. */
|
||
if (tpm2d_command_handler (ctrl, ctrl->thread_startup.fd)
|
||
&& pipe_server)
|
||
shutdown_pending = 1;
|
||
|
||
if (opt.verbose)
|
||
log_info (_("handler for fd %d terminated\n"),
|
||
FD2INT (ctrl->thread_startup.fd));
|
||
|
||
tpm2d_deinit_default_ctrl (ctrl);
|
||
xfree (ctrl);
|
||
|
||
if (--active_connections == 0)
|
||
tpm2d_kick_the_loop ();
|
||
|
||
return NULL;
|
||
}
|
||
|
||
|
||
void
|
||
tpm2d_kick_the_loop (void)
|
||
{
|
||
#ifdef HAVE_W32_SYSTEM
|
||
int ret;
|
||
|
||
/* Kick the select loop. */
|
||
ret = SetEvent (the_event);
|
||
if (ret == 0)
|
||
log_error ("SetEvent for tpm2d_kick_the_loop failed: %s\n",
|
||
w32_strerror (-1));
|
||
#elif defined(HAVE_PSELECT_NO_EINTR)
|
||
write (notify_fd, "", 1);
|
||
#else
|
||
int ret;
|
||
|
||
ret = kill (main_thread_pid, SIGCONT);
|
||
if (ret < 0)
|
||
log_error ("SetEvent for tpm2d_kick_the_loop failed: %s\n",
|
||
gpg_strerror (gpg_error_from_syserror ()));
|
||
#endif
|
||
}
|
||
|
||
/* Connection handler loop. Wait for connection requests and spawn a
|
||
thread after accepting a connection. LISTEN_FD is allowed to be -1
|
||
in which case this code will only do regular timeouts and handle
|
||
signals. */
|
||
static void
|
||
handle_connections (gnupg_fd_t listen_fd)
|
||
{
|
||
npth_attr_t tattr;
|
||
struct sockaddr_un paddr;
|
||
socklen_t plen;
|
||
fd_set fdset, read_fdset;
|
||
int nfd;
|
||
int ret;
|
||
struct timespec timeout;
|
||
struct timespec *t;
|
||
int saved_errno;
|
||
#ifdef HAVE_W32_SYSTEM
|
||
HANDLE events[2];
|
||
unsigned int events_set;
|
||
#else
|
||
int signo;
|
||
#endif
|
||
#ifdef HAVE_PSELECT_NO_EINTR
|
||
int pipe_fd[2];
|
||
|
||
ret = gnupg_create_pipe (pipe_fd);
|
||
if (ret)
|
||
{
|
||
log_error ("pipe creation failed: %s\n", gpg_strerror (ret));
|
||
return;
|
||
}
|
||
notify_fd = pipe_fd[1];
|
||
#endif
|
||
|
||
ret = npth_attr_init (&tattr);
|
||
if (ret)
|
||
{
|
||
log_error ("npth_attr_init failed: %s\n", strerror (ret));
|
||
return;
|
||
}
|
||
|
||
npth_attr_setdetachstate (&tattr, NPTH_CREATE_DETACHED);
|
||
|
||
#ifdef HAVE_W32_SYSTEM
|
||
{
|
||
HANDLE h, h2;
|
||
SECURITY_ATTRIBUTES sa = { sizeof (SECURITY_ATTRIBUTES), NULL, TRUE};
|
||
|
||
events[0] = the_event = INVALID_HANDLE_VALUE;
|
||
events[1] = INVALID_HANDLE_VALUE;
|
||
h = CreateEvent (&sa, TRUE, FALSE, NULL);
|
||
if (!h)
|
||
log_error ("can't create tpm2d event: %s\n", w32_strerror (-1) );
|
||
else if (!DuplicateHandle (GetCurrentProcess (), h,
|
||
GetCurrentProcess (), &h2,
|
||
EVENT_MODIFY_STATE|SYNCHRONIZE, TRUE, 0))
|
||
{
|
||
log_error ("setting synchronize for tpm2d_kick_the_loop failed: %s\n",
|
||
w32_strerror (-1) );
|
||
CloseHandle (h);
|
||
}
|
||
else
|
||
{
|
||
CloseHandle (h);
|
||
events[0] = the_event = h2;
|
||
}
|
||
}
|
||
#else
|
||
npth_sigev_init ();
|
||
npth_sigev_add (SIGHUP);
|
||
npth_sigev_add (SIGUSR1);
|
||
npth_sigev_add (SIGUSR2);
|
||
npth_sigev_add (SIGINT);
|
||
npth_sigev_add (SIGCONT);
|
||
npth_sigev_add (SIGTERM);
|
||
npth_sigev_fini ();
|
||
main_thread_pid = getpid ();
|
||
#endif
|
||
|
||
FD_ZERO (&fdset);
|
||
nfd = 0;
|
||
if (listen_fd != GNUPG_INVALID_FD)
|
||
{
|
||
FD_SET (FD2INT (listen_fd), &fdset);
|
||
nfd = FD2INT (listen_fd);
|
||
}
|
||
|
||
for (;;)
|
||
{
|
||
int periodical_check;
|
||
int max_fd = nfd;
|
||
|
||
if (shutdown_pending)
|
||
{
|
||
if (active_connections == 0)
|
||
break; /* ready */
|
||
|
||
/* Do not accept anymore connections but wait for existing
|
||
connections to terminate. We do this by clearing out all
|
||
file descriptors to wait for, so that the select will be
|
||
used to just wait on a signal or timeout event. */
|
||
FD_ZERO (&fdset);
|
||
listen_fd = GNUPG_INVALID_FD;
|
||
}
|
||
|
||
periodical_check = 0;
|
||
|
||
timeout.tv_sec = TIMERTICK_INTERVAL_SEC;
|
||
timeout.tv_nsec = TIMERTICK_INTERVAL_USEC * 1000;
|
||
|
||
if (shutdown_pending || periodical_check)
|
||
t = &timeout;
|
||
else
|
||
t = NULL;
|
||
|
||
/* POSIX says that fd_set should be implemented as a structure,
|
||
thus a simple assignment is fine to copy the entire set. */
|
||
read_fdset = fdset;
|
||
|
||
#ifdef HAVE_PSELECT_NO_EINTR
|
||
FD_SET (pipe_fd[0], &read_fdset);
|
||
if (max_fd < pipe_fd[0])
|
||
max_fd = pipe_fd[0];
|
||
#endif
|
||
|
||
#ifndef HAVE_W32_SYSTEM
|
||
ret = npth_pselect (max_fd+1, &read_fdset, NULL, NULL, t,
|
||
npth_sigev_sigmask ());
|
||
saved_errno = errno;
|
||
|
||
while (npth_sigev_get_pending (&signo))
|
||
handle_signal (signo);
|
||
#else
|
||
ret = npth_eselect (nfd+1, &read_fdset, NULL, NULL, t,
|
||
events, &events_set);
|
||
saved_errno = errno;
|
||
if (events_set & 1)
|
||
continue;
|
||
#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)
|
||
/* Timeout. Will be handled when calculating the next timeout. */
|
||
continue;
|
||
|
||
#ifdef HAVE_PSELECT_NO_EINTR
|
||
if (FD_ISSET (pipe_fd[0], &read_fdset))
|
||
{
|
||
char buf[256];
|
||
|
||
read (pipe_fd[0], buf, sizeof buf);
|
||
}
|
||
#endif
|
||
|
||
if (listen_fd != GNUPG_INVALID_FD
|
||
&& FD_ISSET (FD2INT (listen_fd), &read_fdset))
|
||
{
|
||
ctrl_t ctrl;
|
||
gnupg_fd_t fd;
|
||
|
||
plen = sizeof paddr;
|
||
fd = INT2FD (npth_accept (FD2INT (listen_fd),
|
||
(struct sockaddr *)&paddr, &plen));
|
||
if (fd == GNUPG_INVALID_FD)
|
||
{
|
||
log_error ("accept failed: %s\n", strerror (errno));
|
||
}
|
||
else if ( !(ctrl = xtrycalloc (1, sizeof *ctrl)) )
|
||
{
|
||
log_error ("error allocating connection control data: %s\n",
|
||
strerror (errno) );
|
||
assuan_sock_close (fd);
|
||
}
|
||
else
|
||
{
|
||
char threadname[50];
|
||
npth_t thread;
|
||
|
||
snprintf (threadname, sizeof threadname, "conn fd=%d", FD2INT (fd));
|
||
ctrl->thread_startup.fd = fd;
|
||
ret = npth_create (&thread, &tattr, start_connection_thread, ctrl);
|
||
if (ret)
|
||
{
|
||
log_error ("error spawning connection handler: %s\n",
|
||
strerror (ret));
|
||
xfree (ctrl);
|
||
assuan_sock_close (fd);
|
||
}
|
||
else
|
||
npth_setname_np (thread, threadname);
|
||
}
|
||
}
|
||
}
|
||
|
||
#ifdef HAVE_W32_SYSTEM
|
||
if (the_event != INVALID_HANDLE_VALUE)
|
||
CloseHandle (the_event);
|
||
#endif
|
||
#ifdef HAVE_PSELECT_NO_EINTR
|
||
close (pipe_fd[0]);
|
||
close (pipe_fd[1]);
|
||
#endif
|
||
cleanup ();
|
||
log_info (_("%s %s stopped\n"), gpgrt_strusage (11), gpgrt_strusage (13));
|
||
npth_attr_destroy (&tattr);
|
||
}
|
||
|
||
/* Return the number of active connections. */
|
||
int
|
||
get_active_connection_count (void)
|
||
{
|
||
return active_connections;
|
||
}
|