mirror of
git://git.gnupg.org/gnupg.git
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217d2ec8af
Fixes bug#1386. * agent/gpg-agent.c (main): Terminate csh style output with a semicolon. * scd/scdaemon.c: Ditto.
1319 lines
37 KiB
C
1319 lines
37 KiB
C
/* scdaemon.c - The GnuPG Smartcard Daemon
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* Copyright (C) 2001, 2002, 2004, 2005,
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* 2007, 2008, 2009 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 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 <http://www.gnu.org/licenses/>.
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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 <pth.h>
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#define JNLIB_NEED_LOG_LOGV
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#define JNLIB_NEED_AFLOCAL
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#include "scdaemon.h"
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#include <ksba.h>
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#include <gcrypt.h>
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#include <assuan.h> /* malloc hooks */
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#include "i18n.h"
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#include "sysutils.h"
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#include "app-common.h"
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#include "apdu.h"
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#include "ccid-driver.h"
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#include "mkdtemp.h"
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#include "gc-opt-flags.h"
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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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oDebugCCIDDriver,
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oDebugLogTid,
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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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oBatch,
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oReaderPort,
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oCardTimeout,
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octapiDriver,
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opcscDriver,
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oDisableCCID,
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oDisableOpenSC,
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oDisableKeypad,
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oAllowAdmin,
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oDenyAdmin,
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oDisableApplication,
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oDebugDisableTicker
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};
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static ARGPARSE_OPTS 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_p_u (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 (oDebugCCIDDriver, "debug-ccid-driver", "@"),
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ARGPARSE_s_n (oDebugDisableTicker, "debug-disable-ticker", "@"),
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ARGPARSE_s_n (oDebugLogTid, "debug-log-tid", "@"),
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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 (oReaderPort, "reader-port",
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N_("|N|connect to reader at port N")),
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ARGPARSE_s_s (octapiDriver, "ctapi-driver",
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N_("|NAME|use NAME as ct-API driver")),
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ARGPARSE_s_s (opcscDriver, "pcsc-driver",
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N_("|NAME|use NAME as PC/SC driver")),
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ARGPARSE_s_n (oDisableCCID, "disable-ccid",
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#ifdef HAVE_LIBUSB
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N_("do not use the internal CCID driver")
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#else
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"@"
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#endif
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/* end --disable-ccid */),
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ARGPARSE_s_u (oCardTimeout, "card-timeout",
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N_("|N|disconnect the card after N seconds of inactivity")),
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ARGPARSE_s_n (oDisableKeypad, "disable-keypad",
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N_("do not use a reader's keypad")),
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ARGPARSE_s_n (oAllowAdmin, "allow-admin", "@"),
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ARGPARSE_s_n (oDenyAdmin, "deny-admin",
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N_("deny the use of admin card commands")),
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ARGPARSE_s_s (oDisableApplication, "disable-application", "@"),
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ARGPARSE_end ()
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};
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/* The card driver we use by default for PC/SC. */
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#if defined(HAVE_W32_SYSTEM) || defined(__CYGWIN__)
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#define DEFAULT_PCSC_DRIVER "winscard.dll"
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#elif defined(__APPLE__)
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#define DEFAULT_PCSC_DRIVER "/System/Library/Frameworks/PCSC.framework/PCSC"
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#elif defined(__GLIBC__)
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#define DEFAULT_PCSC_DRIVER "libpcsclite.so.1"
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#else
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#define DEFAULT_PCSC_DRIVER "libpcsclite.so"
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#endif
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/* The timer tick used for housekeeping stuff. We poll every 500ms to
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let the user immediately know a status change.
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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 Pth
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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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/* 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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/* Debug flag to disable the ticker. The ticker is in fact not
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disabled but it won't perform any ticker specific actions. */
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static int ticker_disabled;
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static char *create_socket_name (int use_standard_socket,
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char *standard_name, char *template);
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static gnupg_fd_t create_server_socket (int is_standard_name, const char *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 (int listen_fd);
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/* Pth wrapper function definitions. */
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ASSUAN_SYSTEM_PTH_IMPL;
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GCRY_THREAD_OPTION_PTH_IMPL;
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static int fixed_gcry_pth_init (void)
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{
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return pth_self ()? 0 : (pth_init () == FALSE) ? errno : 0;
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}
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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, *ver_ksba;
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const char *p;
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switch (level)
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{
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case 11: p = "scdaemon (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 21:
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if (!ver_ksba)
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ver_ksba = make_libversion ("libksba", ksba_check_version);
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p = ver_ksba;
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break;
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case 1:
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case 40: p = _("Usage: scdaemon [options] (-h for help)");
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break;
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case 41: p = _("Syntax: scdaemon [options] [command [args]]\n"
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"Smartcard 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 unsigned long
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tid_log_callback (void)
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{
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#ifdef PTH_HAVE_PTH_THREAD_ID
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return pth_thread_id ();
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#else
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return (unsigned long)pth_self ();
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#endif
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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_ASSUAN_VALUE;
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else if (!strcmp (level, "advanced") || (numok && numlvl <= 5))
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opt.debug = DBG_ASSUAN_VALUE|DBG_COMMAND_VALUE;
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else if (!strcmp (level, "expert") || (numok && numlvl <= 8))
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opt.debug = (DBG_ASSUAN_VALUE|DBG_COMMAND_VALUE
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|DBG_CACHE_VALUE|DBG_CARD_IO_VALUE);
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else if (!strcmp (level, "guru") || numok)
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{
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opt.debug = ~0;
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/* Unless the "guru" string has been used we don't want to allow
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hashing debugging. The rationale is that people tend to
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select the highest debug value and would then clutter their
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disk with debug files which may reveal confidential data. */
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if (numok)
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opt.debug &= ~(DBG_HASHING_VALUE);
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}
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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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scd_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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log_info ("enabled debug flags:%s%s%s%s%s%s%s%s%s\n",
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(opt.debug & DBG_COMMAND_VALUE)? " command":"",
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(opt.debug & DBG_MPI_VALUE )? " mpi":"",
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(opt.debug & DBG_CRYPTO_VALUE )? " crypto":"",
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(opt.debug & DBG_MEMORY_VALUE )? " memory":"",
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(opt.debug & DBG_CACHE_VALUE )? " cache":"",
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(opt.debug & DBG_MEMSTAT_VALUE)? " memstat":"",
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(opt.debug & DBG_HASHING_VALUE)? " hashing":"",
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(opt.debug & DBG_ASSUAN_VALUE )? " assuan":"",
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(opt.debug & DBG_CARD_IO_VALUE)? " cardio":"");
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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 *p;
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remove (socket_name);
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p = strrchr (socket_name, '/');
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if (p)
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{
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*p = 0;
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rmdir (socket_name);
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*p = '/';
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}
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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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ARGPARSE_ARGS pargs;
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int orig_argc;
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gpg_error_t err;
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char **orig_argv;
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FILE *configfp = NULL;
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char *configname = NULL;
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const char *shell;
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unsigned int configlineno;
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int parse_debug = 0;
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const char *debug_level = NULL;
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int default_config =1;
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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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const char *config_filename = NULL;
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int allow_coredump = 0;
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int standard_socket = 0;
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struct assuan_malloc_hooks malloc_hooks;
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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 ("scdaemon", 1|4);
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/* Make sure that our subsystems are ready. */
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i18n_init ();
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init_common_subsystems ();
|
||
|
||
|
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/* Libgcrypt requires us to register the threading model first.
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Note that this will also do the pth_init. */
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gcry_threads_pth.init = fixed_gcry_pth_init;
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err = gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pth);
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if (err)
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{
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log_fatal ("can't register GNU Pth with Libgcrypt: %s\n",
|
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gpg_strerror (err));
|
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}
|
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|
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/* Check that the libraries are suitable. Do it here because
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the option parsing may need services of the library */
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if (!gcry_check_version (NEED_LIBGCRYPT_VERSION) )
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{
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log_fatal (_("%s is too old (need %s, have %s)\n"), "libgcrypt",
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NEED_LIBGCRYPT_VERSION, gcry_check_version (NULL) );
|
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}
|
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|
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ksba_set_malloc_hooks (gcry_malloc, gcry_realloc, gcry_free);
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|
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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_assuan_log_prefix (log_get_prefix (NULL));
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assuan_set_gpg_err_source (GPG_ERR_SOURCE_DEFAULT);
|
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assuan_set_system_hooks (ASSUAN_SYSTEM_PTH);
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assuan_sock_init ();
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||
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setup_libgcrypt_logging ();
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gcry_control (GCRYCTL_USE_SECURE_RNDPOOL);
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||
|
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disable_core_dumps ();
|
||
|
||
/* Set default options. */
|
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opt.allow_admin = 1;
|
||
opt.pcsc_driver = DEFAULT_PCSC_DRIVER;
|
||
|
||
#ifdef HAVE_W32_SYSTEM
|
||
standard_socket = 1; /* Under Windows we always use a standard
|
||
socket. */
|
||
#endif
|
||
|
||
|
||
shell = getenv ("SHELL");
|
||
if (shell && strlen (shell) >= 3 && !strcmp (shell+strlen (shell)-3, "csh") )
|
||
csh_style = 1;
|
||
|
||
opt.homedir = default_homedir ();
|
||
|
||
/* Check whether we have a config file on the commandline */
|
||
orig_argc = argc;
|
||
orig_argv = argv;
|
||
pargs.argc = &argc;
|
||
pargs.argv = &argv;
|
||
pargs.flags= 1|(1<<6); /* do not remove the args, ignore version */
|
||
while (arg_parse( &pargs, opts))
|
||
{
|
||
if (pargs.r_opt == oDebug || pargs.r_opt == oDebugAll)
|
||
parse_debug++;
|
||
else if (pargs.r_opt == oOptions)
|
||
{ /* yes there is one, so we do not try the default one, but
|
||
read the option file when it is encountered at the
|
||
commandline */
|
||
default_config = 0;
|
||
}
|
||
else if (pargs.r_opt == oNoOptions)
|
||
default_config = 0; /* --no-options */
|
||
else if (pargs.r_opt == oHomedir)
|
||
opt.homedir = pargs.r.ret_str;
|
||
}
|
||
|
||
/* initialize the secure memory. */
|
||
gcry_control (GCRYCTL_INIT_SECMEM, 16384, 0);
|
||
maybe_setuid = 0;
|
||
|
||
/*
|
||
Now we are working under our real uid
|
||
*/
|
||
|
||
|
||
if (default_config)
|
||
configname = make_filename (opt.homedir, "scdaemon.conf", NULL );
|
||
|
||
|
||
argc = orig_argc;
|
||
argv = orig_argv;
|
||
pargs.argc = &argc;
|
||
pargs.argv = &argv;
|
||
pargs.flags= 1; /* do not remove the args */
|
||
next_pass:
|
||
if (configname)
|
||
{
|
||
configlineno = 0;
|
||
configfp = fopen (configname, "r");
|
||
if (!configfp)
|
||
{
|
||
if (default_config)
|
||
{
|
||
if( parse_debug )
|
||
log_info (_("NOTE: no default option file `%s'\n"),
|
||
configname );
|
||
}
|
||
else
|
||
{
|
||
log_error (_("option file `%s': %s\n"),
|
||
configname, strerror(errno) );
|
||
exit(2);
|
||
}
|
||
xfree (configname);
|
||
configname = NULL;
|
||
}
|
||
if (parse_debug && configname )
|
||
log_info (_("reading options from `%s'\n"), configname );
|
||
default_config = 0;
|
||
}
|
||
|
||
while (optfile_parse( configfp, configname, &configlineno, &pargs, opts) )
|
||
{
|
||
switch (pargs.r_opt)
|
||
{
|
||
case aGPGConfList: gpgconf_list = 1; break;
|
||
case aGPGConfTest: gpgconf_list = 2; break;
|
||
case oQuiet: opt.quiet = 1; break;
|
||
case oVerbose: opt.verbose++; break;
|
||
case oBatch: opt.batch=1; break;
|
||
|
||
case oDebug: opt.debug |= pargs.r.ret_ulong; 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 oDebugCCIDDriver:
|
||
#ifdef HAVE_LIBUSB
|
||
ccid_set_debug_level (ccid_set_debug_level (-1)+1);
|
||
#endif /*HAVE_LIBUSB*/
|
||
break;
|
||
case oDebugDisableTicker: ticker_disabled = 1; break;
|
||
case oDebugLogTid:
|
||
log_set_get_tid_callback (tid_log_callback);
|
||
break;
|
||
|
||
case oOptions:
|
||
/* config files may not be nested (silently ignore them) */
|
||
if (!configfp)
|
||
{
|
||
xfree(configname);
|
||
configname = xstrdup(pargs.r.ret_str);
|
||
goto next_pass;
|
||
}
|
||
break;
|
||
case oNoGreeting: nogreeting = 1; break;
|
||
case oNoVerbose: opt.verbose = 0; break;
|
||
case oNoOptions: break; /* no-options */
|
||
case oHomedir: opt.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 oReaderPort: opt.reader_port = pargs.r.ret_str; break;
|
||
case octapiDriver: opt.ctapi_driver = pargs.r.ret_str; break;
|
||
case opcscDriver: opt.pcsc_driver = pargs.r.ret_str; break;
|
||
case oDisableCCID: opt.disable_ccid = 1; break;
|
||
case oDisableOpenSC: break;
|
||
|
||
case oDisableKeypad: opt.disable_keypad = 1; break;
|
||
|
||
case oAllowAdmin: /* Dummy because allow is now the default. */
|
||
break;
|
||
case oDenyAdmin: opt.allow_admin = 0; break;
|
||
|
||
case oCardTimeout: opt.card_timeout = pargs.r.ret_ulong; break;
|
||
|
||
case oDisableApplication:
|
||
add_to_strlist (&opt.disabled_applications, pargs.r.ret_str);
|
||
break;
|
||
|
||
default:
|
||
pargs.err = configfp? ARGPARSE_PRINT_WARNING:ARGPARSE_PRINT_ERROR;
|
||
break;
|
||
}
|
||
}
|
||
if (configfp)
|
||
{
|
||
fclose( configfp );
|
||
configfp = NULL;
|
||
/* Keep a copy of the config name for use by --gpgconf-list. */
|
||
config_filename = configname;
|
||
configname = NULL;
|
||
goto next_pass;
|
||
}
|
||
xfree (configname);
|
||
configname = NULL;
|
||
if (log_get_errorcount(0))
|
||
exit(2);
|
||
if (nogreeting )
|
||
greeting = 0;
|
||
|
||
if (greeting)
|
||
{
|
||
fprintf (stderr, "%s %s; %s\n",
|
||
strusage(11), strusage(13), strusage(14) );
|
||
fprintf (stderr, "%s\n", strusage(15) );
|
||
}
|
||
#ifdef IS_DEVELOPMENT_VERSION
|
||
log_info ("NOTE: this is a development version!\n");
|
||
#endif
|
||
|
||
|
||
if (atexit (cleanup))
|
||
{
|
||
log_error ("atexit failed\n");
|
||
cleanup ();
|
||
exit (1);
|
||
}
|
||
|
||
set_debug (debug_level);
|
||
|
||
initialize_module_command ();
|
||
|
||
if (gpgconf_list == 2)
|
||
scd_exit (0);
|
||
if (gpgconf_list)
|
||
{
|
||
/* List options and default values in the GPG Conf format. */
|
||
char *filename = NULL;
|
||
char *filename_esc;
|
||
|
||
if (config_filename)
|
||
filename = xstrdup (config_filename);
|
||
else
|
||
filename = make_filename (opt.homedir, "scdaemon.conf", NULL);
|
||
filename_esc = percent_escape (filename, NULL);
|
||
|
||
printf ("gpgconf-scdaemon.conf:%lu:\"%s\n",
|
||
GC_OPT_FLAG_DEFAULT, filename_esc);
|
||
xfree (filename_esc);
|
||
xfree (filename);
|
||
|
||
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 );
|
||
|
||
printf ("reader-port:%lu:\n", GC_OPT_FLAG_NONE );
|
||
printf ("ctapi-driver:%lu:\n", GC_OPT_FLAG_NONE );
|
||
printf ("pcsc-driver:%lu:\"%s:\n",
|
||
GC_OPT_FLAG_DEFAULT, DEFAULT_PCSC_DRIVER );
|
||
#ifdef HAVE_LIBUSB
|
||
printf ("disable-ccid:%lu:\n", GC_OPT_FLAG_NONE );
|
||
#endif
|
||
printf ("deny-admin:%lu:\n", GC_OPT_FLAG_NONE );
|
||
printf ("disable-keypad:%lu:\n", GC_OPT_FLAG_NONE );
|
||
printf ("card-timeout:%lu:%d:\n", GC_OPT_FLAG_DEFAULT, 0);
|
||
|
||
scd_exit (0);
|
||
}
|
||
|
||
/* Now start with logging to a file if this is desired. */
|
||
if (logfile)
|
||
{
|
||
log_set_file (logfile);
|
||
log_set_prefix (NULL, 1|2|4);
|
||
}
|
||
|
||
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;
|
||
pth_attr_t tattr;
|
||
int fd = -1;
|
||
|
||
#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
|
||
|
||
/* 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 (standard_socket,
|
||
"S.scdaemon",
|
||
"/tmp/gpg-XXXXXX/S.scdaemon");
|
||
|
||
fd = FD2INT(create_server_socket (standard_socket,
|
||
socket_name, &socket_nonce));
|
||
}
|
||
|
||
tattr = pth_attr_new();
|
||
pth_attr_set (tattr, PTH_ATTR_JOINABLE, 0);
|
||
pth_attr_set (tattr, PTH_ATTR_STACK_SIZE, 512*1024);
|
||
pth_attr_set (tattr, PTH_ATTR_NAME, "pipe-connection");
|
||
|
||
ctrl = xtrycalloc (1, sizeof *ctrl);
|
||
if ( !ctrl )
|
||
{
|
||
log_error ("error allocating connection control data: %s\n",
|
||
strerror (errno) );
|
||
scd_exit (2);
|
||
}
|
||
ctrl->thread_startup.fd = GNUPG_INVALID_FD;
|
||
if ( !pth_spawn (tattr, start_connection_thread, ctrl) )
|
||
{
|
||
log_error ("error spawning pipe connection handler: %s\n",
|
||
strerror (errno) );
|
||
xfree (ctrl);
|
||
scd_exit (2);
|
||
}
|
||
|
||
/* We run handle_connection to wait for the shutdown signal and
|
||
to run the ticker stuff. */
|
||
handle_connections (fd);
|
||
if (fd != -1)
|
||
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 */
|
||
int fd;
|
||
#ifndef HAVE_W32_SYSTEM
|
||
pid_t pid;
|
||
int i;
|
||
#endif
|
||
|
||
/* Create the socket. */
|
||
socket_name = create_socket_name (standard_socket,
|
||
"S.scdaemon",
|
||
"/tmp/gpg-XXXXXX/S.scdaemon");
|
||
|
||
fd = FD2INT (create_server_socket (standard_socket,
|
||
socket_name, &socket_nonce));
|
||
|
||
|
||
fflush (NULL);
|
||
#ifndef 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 */
|
||
char *infostr;
|
||
|
||
close (fd);
|
||
|
||
/* create the info string: <name>:<pid>:<protocol_version> */
|
||
if (estream_asprintf (&infostr, "SCDAEMON_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, '=') = ' ';
|
||
printf ( "setenv %s;\n", infostr);
|
||
}
|
||
else
|
||
{
|
||
printf ( "%s; export SCDAEMON_INFO;\n", infostr);
|
||
}
|
||
xfree (infostr);
|
||
exit (0);
|
||
}
|
||
/* NOTREACHED */
|
||
} /* end parent */
|
||
|
||
/* This is the child. */
|
||
|
||
/* 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)
|
||
close (i);
|
||
}
|
||
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);
|
||
}
|
||
|
||
if (chdir("/"))
|
||
{
|
||
log_error ("chdir to / failed: %s\n", strerror (errno));
|
||
exit (1);
|
||
}
|
||
|
||
#endif /*!HAVE_W32_SYSTEM*/
|
||
|
||
handle_connections (fd);
|
||
|
||
close (fd);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
void
|
||
scd_exit (int rc)
|
||
{
|
||
apdu_prepare_exit ();
|
||
#if 0
|
||
#warning no update_random_seed_file
|
||
update_random_seed_file();
|
||
#endif
|
||
#if 0
|
||
/* at this time a bit annoying */
|
||
if (opt.debug & DBG_MEMSTAT_VALUE)
|
||
{
|
||
gcry_control( GCRYCTL_DUMP_MEMORY_STATS );
|
||
gcry_control( GCRYCTL_DUMP_RANDOM_STATS );
|
||
}
|
||
if (opt.debug)
|
||
gcry_control (GCRYCTL_DUMP_SECMEM_STATS );
|
||
#endif
|
||
gcry_control (GCRYCTL_TERM_SECMEM );
|
||
rc = rc? rc : log_get_errorcount(0)? 2 : 0;
|
||
exit (rc);
|
||
}
|
||
|
||
|
||
static void
|
||
scd_init_default_ctrl (ctrl_t ctrl)
|
||
{
|
||
ctrl->reader_slot = -1;
|
||
}
|
||
|
||
static void
|
||
scd_deinit_default_ctrl (ctrl_t ctrl)
|
||
{
|
||
(void)ctrl;
|
||
}
|
||
|
||
|
||
/* Return the name of the socket to be used to connect to this
|
||
process. If no socket is available, return NULL. */
|
||
const char *
|
||
scd_get_socket_name ()
|
||
{
|
||
if (socket_name && *socket_name)
|
||
return socket_name;
|
||
return NULL;
|
||
}
|
||
|
||
|
||
static void
|
||
handle_signal (int signo)
|
||
{
|
||
switch (signo)
|
||
{
|
||
#ifndef HAVE_W32_SYSTEM
|
||
case SIGHUP:
|
||
log_info ("SIGHUP received - "
|
||
"re-reading configuration and resetting cards\n");
|
||
/* reread_configuration (); */
|
||
break;
|
||
|
||
case SIGUSR1:
|
||
log_info ("SIGUSR1 received - printing internal information:\n");
|
||
pth_ctrl (PTH_CTRL_DUMPSTATE, log_get_stream ());
|
||
app_dump_state ();
|
||
break;
|
||
|
||
case SIGUSR2:
|
||
log_info ("SIGUSR2 received - no action defined\n");
|
||
break;
|
||
|
||
case SIGTERM:
|
||
if (!shutdown_pending)
|
||
log_info ("SIGTERM received - shutting down ...\n");
|
||
else
|
||
log_info ("SIGTERM received - still %ld running threads\n",
|
||
pth_ctrl( PTH_CTRL_GETTHREADS ));
|
||
shutdown_pending++;
|
||
if (shutdown_pending > 2)
|
||
{
|
||
log_info ("shutdown forced\n");
|
||
log_info ("%s %s stopped\n", strusage(11), strusage(13) );
|
||
cleanup ();
|
||
scd_exit (0);
|
||
}
|
||
break;
|
||
|
||
case SIGINT:
|
||
log_info ("SIGINT received - immediate shutdown\n");
|
||
log_info( "%s %s stopped\n", strusage(11), strusage(13));
|
||
cleanup ();
|
||
scd_exit (0);
|
||
break;
|
||
#endif /*!HAVE_W32_SYSTEM*/
|
||
|
||
default:
|
||
log_info ("signal %d received - no action defined\n", signo);
|
||
}
|
||
}
|
||
|
||
|
||
static void
|
||
handle_tick (void)
|
||
{
|
||
if (!ticker_disabled)
|
||
scd_update_reader_status_file ();
|
||
}
|
||
|
||
|
||
/* Create a name for the socket. With USE_STANDARD_SOCKET given as
|
||
true using STANDARD_NAME in the home directory or if given has
|
||
false from the mkdir type name TEMPLATE. In the latter case a
|
||
unique name in a unique new directory will be created. In both
|
||
cases 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 (int use_standard_socket,
|
||
char *standard_name, char *template)
|
||
{
|
||
char *name, *p;
|
||
|
||
if (use_standard_socket)
|
||
name = make_filename (opt.homedir, standard_name, NULL);
|
||
else
|
||
{
|
||
name = xstrdup (template);
|
||
p = strrchr (name, '/');
|
||
if (!p)
|
||
BUG ();
|
||
*p = 0;
|
||
if (!mkdtemp (name))
|
||
{
|
||
log_error (_("can't create directory `%s': %s\n"),
|
||
name, strerror (errno));
|
||
scd_exit (2);
|
||
}
|
||
*p = '/';
|
||
}
|
||
|
||
if (strchr (name, PATHSEP_C))
|
||
{
|
||
log_error (("`%s' are not allowed in the socket name\n"), PATHSEP_S);
|
||
scd_exit (2);
|
||
}
|
||
if (strlen (name) + 1 >= DIMof (struct sockaddr_un, sun_path) )
|
||
{
|
||
log_error (_("name of socket too long\n"));
|
||
scd_exit (2);
|
||
}
|
||
return name;
|
||
}
|
||
|
||
|
||
|
||
/* Create a Unix domain socket with NAME. IS_STANDARD_NAME indicates
|
||
whether a non-random socket is used. Returns the file descriptor
|
||
or terminates the process in case of an error. */
|
||
static gnupg_fd_t
|
||
create_server_socket (int is_standard_name, const char *name,
|
||
assuan_sock_nonce_t *nonce)
|
||
{
|
||
struct sockaddr_un *serv_addr;
|
||
socklen_t len;
|
||
gnupg_fd_t fd;
|
||
int rc;
|
||
|
||
fd = assuan_sock_new (AF_UNIX, SOCK_STREAM, 0);
|
||
if (fd == GNUPG_INVALID_FD)
|
||
{
|
||
log_error (_("can't create socket: %s\n"), strerror (errno));
|
||
scd_exit (2);
|
||
}
|
||
|
||
serv_addr = xmalloc (sizeof (*serv_addr));
|
||
memset (serv_addr, 0, sizeof *serv_addr);
|
||
serv_addr->sun_family = AF_UNIX;
|
||
assert (strlen (name) + 1 < sizeof (serv_addr->sun_path));
|
||
strcpy (serv_addr->sun_path, name);
|
||
len = SUN_LEN (serv_addr);
|
||
|
||
rc = assuan_sock_bind (fd, (struct sockaddr*) serv_addr, len);
|
||
if (is_standard_name && rc == -1 && errno == EADDRINUSE)
|
||
{
|
||
remove (name);
|
||
rc = assuan_sock_bind (fd, (struct sockaddr*) serv_addr, len);
|
||
}
|
||
if (rc != -1
|
||
&& (rc=assuan_sock_get_nonce ((struct sockaddr*)serv_addr, len, nonce)))
|
||
log_error (_("error getting nonce for the socket\n"));
|
||
if (rc == -1)
|
||
{
|
||
log_error (_("error binding socket to `%s': %s\n"),
|
||
serv_addr->sun_path,
|
||
gpg_strerror (gpg_error_from_syserror ()));
|
||
assuan_sock_close (fd);
|
||
scd_exit (2);
|
||
}
|
||
|
||
if (listen (FD2INT(fd), 5 ) == -1)
|
||
{
|
||
log_error (_("listen() failed: %s\n"),
|
||
gpg_strerror (gpg_error_from_syserror ()));
|
||
assuan_sock_close (fd);
|
||
scd_exit (2);
|
||
}
|
||
|
||
if (opt.verbose)
|
||
log_info (_("listening on socket `%s'\n"), serv_addr->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;
|
||
}
|
||
|
||
scd_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 (scd_command_handler (ctrl, FD2INT(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));
|
||
|
||
scd_deinit_default_ctrl (ctrl);
|
||
xfree (ctrl);
|
||
return NULL;
|
||
}
|
||
|
||
|
||
/* 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 (int listen_fd)
|
||
{
|
||
pth_attr_t tattr;
|
||
pth_event_t ev, time_ev;
|
||
sigset_t sigs;
|
||
int signo;
|
||
struct sockaddr_un paddr;
|
||
socklen_t plen;
|
||
fd_set fdset, read_fdset;
|
||
int ret;
|
||
int fd;
|
||
int nfd;
|
||
|
||
tattr = pth_attr_new();
|
||
pth_attr_set (tattr, PTH_ATTR_JOINABLE, 0);
|
||
pth_attr_set (tattr, PTH_ATTR_STACK_SIZE, 512*1024);
|
||
|
||
#ifndef HAVE_W32_SYSTEM /* fixme */
|
||
sigemptyset (&sigs );
|
||
sigaddset (&sigs, SIGHUP);
|
||
sigaddset (&sigs, SIGUSR1);
|
||
sigaddset (&sigs, SIGUSR2);
|
||
sigaddset (&sigs, SIGINT);
|
||
sigaddset (&sigs, SIGTERM);
|
||
pth_sigmask (SIG_UNBLOCK, &sigs, NULL);
|
||
ev = pth_event (PTH_EVENT_SIGS, &sigs, &signo);
|
||
#else
|
||
sigs = 0;
|
||
ev = pth_event (PTH_EVENT_SIGS, &sigs, &signo);
|
||
#endif
|
||
time_ev = NULL;
|
||
|
||
FD_ZERO (&fdset);
|
||
nfd = 0;
|
||
if (listen_fd != -1)
|
||
{
|
||
FD_SET (listen_fd, &fdset);
|
||
nfd = listen_fd;
|
||
}
|
||
|
||
for (;;)
|
||
{
|
||
sigset_t oldsigs;
|
||
|
||
if (shutdown_pending)
|
||
{
|
||
if (pth_ctrl (PTH_CTRL_GETTHREADS) == 1)
|
||
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 = -1;
|
||
}
|
||
|
||
/* Create a timeout event if needed. Round it up to the next
|
||
microsecond interval to help with power saving. */
|
||
if (!time_ev)
|
||
{
|
||
pth_time_t nexttick = pth_timeout (TIMERTICK_INTERVAL_SEC,
|
||
TIMERTICK_INTERVAL_USEC/2);
|
||
if ((nexttick.tv_usec % (TIMERTICK_INTERVAL_USEC/2)) > 10)
|
||
{
|
||
nexttick.tv_usec = ((nexttick.tv_usec
|
||
/(TIMERTICK_INTERVAL_USEC/2))
|
||
+ 1) * (TIMERTICK_INTERVAL_USEC/2);
|
||
if (nexttick.tv_usec >= 1000000)
|
||
{
|
||
nexttick.tv_sec++;
|
||
nexttick.tv_usec = 0;
|
||
}
|
||
}
|
||
time_ev = pth_event (PTH_EVENT_TIME, nexttick);
|
||
}
|
||
|
||
/* 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;
|
||
|
||
if (time_ev)
|
||
pth_event_concat (ev, time_ev, NULL);
|
||
ret = pth_select_ev (nfd+1, &read_fdset, NULL, NULL, NULL, ev);
|
||
if (time_ev)
|
||
pth_event_isolate (time_ev);
|
||
|
||
if (ret == -1)
|
||
{
|
||
if (pth_event_occurred (ev)
|
||
|| (time_ev && pth_event_occurred (time_ev)))
|
||
{
|
||
if (pth_event_occurred (ev))
|
||
handle_signal (signo);
|
||
if (time_ev && pth_event_occurred (time_ev))
|
||
{
|
||
pth_event_free (time_ev, PTH_FREE_ALL);
|
||
time_ev = NULL;
|
||
handle_tick ();
|
||
}
|
||
continue;
|
||
}
|
||
log_error (_("pth_select failed: %s - waiting 1s\n"),
|
||
strerror (errno));
|
||
pth_sleep (1);
|
||
continue;
|
||
}
|
||
|
||
if (pth_event_occurred (ev))
|
||
{
|
||
handle_signal (signo);
|
||
}
|
||
|
||
if (time_ev && pth_event_occurred (time_ev))
|
||
{
|
||
pth_event_free (time_ev, PTH_FREE_ALL);
|
||
time_ev = NULL;
|
||
handle_tick ();
|
||
}
|
||
|
||
/* We now might create new threads and because we don't want any
|
||
signals - we are handling here - to be delivered to a new
|
||
thread. Thus we need to block those signals. */
|
||
pth_sigmask (SIG_BLOCK, &sigs, &oldsigs);
|
||
|
||
if (listen_fd != -1 && FD_ISSET (listen_fd, &read_fdset))
|
||
{
|
||
ctrl_t ctrl;
|
||
|
||
plen = sizeof paddr;
|
||
fd = pth_accept (listen_fd, (struct sockaddr *)&paddr, &plen);
|
||
if (fd == -1)
|
||
{
|
||
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) );
|
||
close (fd);
|
||
}
|
||
else
|
||
{
|
||
char threadname[50];
|
||
|
||
snprintf (threadname, sizeof threadname-1, "conn fd=%d", fd);
|
||
threadname[sizeof threadname -1] = 0;
|
||
pth_attr_set (tattr, PTH_ATTR_NAME, threadname);
|
||
ctrl->thread_startup.fd = INT2FD (fd);
|
||
if (!pth_spawn (tattr, start_connection_thread, ctrl))
|
||
{
|
||
log_error ("error spawning connection handler: %s\n",
|
||
strerror (errno) );
|
||
xfree (ctrl);
|
||
close (fd);
|
||
}
|
||
}
|
||
fd = -1;
|
||
}
|
||
|
||
/* Restore the signal mask. */
|
||
pth_sigmask (SIG_SETMASK, &oldsigs, NULL);
|
||
|
||
}
|
||
|
||
pth_event_free (ev, PTH_FREE_ALL);
|
||
if (time_ev)
|
||
pth_event_free (time_ev, PTH_FREE_ALL);
|
||
cleanup ();
|
||
log_info (_("%s %s stopped\n"), strusage(11), strusage(13));
|
||
}
|
||
|
||
|