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git://git.gnupg.org/gnupg.git
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e21bf7b9e0
detached. * logging.h (JNLIB_LOG_WITH_PREFIX): Add constants for the flag values. * logging.c (log_set_prefix): New flag DETACHED. (fun_writer): Take care of this flag. (log_test_fd): New.
1187 lines
33 KiB
C
1187 lines
33 KiB
C
/* gpg-agent.c - The GnuPG Agent
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* Copyright (C) 2000, 2001, 2002, 2003 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 2 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <stdarg.h>
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#include <string.h>
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#include <errno.h>
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#include <assert.h>
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#include <time.h>
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#include <fcntl.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <unistd.h>
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#include <signal.h>
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#ifdef USE_GNU_PTH
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# include <pth.h>
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#endif
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#define JNLIB_NEED_LOG_LOGV
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#include "agent.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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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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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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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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oDaemon,
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oBatch,
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oPinentryProgram,
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oDisplay,
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oTTYname,
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oTTYtype,
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oLCctype,
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oLCmessages,
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oScdaemonProgram,
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oDefCacheTTL,
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oDisablePth,
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oIgnoreCacheForSigning,
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oKeepTTY,
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oKeepDISPLAY,
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aTest };
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static ARGPARSE_OPTS opts[] = {
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{ aGPGConfList, "gpgconf-list", 256, "@" },
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{ 301, NULL, 0, N_("@Options:\n ") },
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{ oServer, "server", 0, N_("run in server mode (foreground)") },
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{ oDaemon, "daemon", 0, N_("run in daemon mode (background)") },
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{ oVerbose, "verbose", 0, N_("verbose") },
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{ oQuiet, "quiet", 0, N_("be somewhat more quiet") },
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{ oSh, "sh", 0, N_("sh-style command output") },
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{ oCsh, "csh", 0, N_("csh-style command output") },
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{ oOptions, "options" , 2, N_("|FILE|read options from FILE")},
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{ oDebug, "debug" ,4|16, "@"},
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{ oDebugAll, "debug-all" ,0, "@"},
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{ oDebugLevel, "debug-level" ,2, "@"},
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{ oDebugWait,"debug-wait",1, "@"},
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{ oNoDetach, "no-detach" ,0, N_("do not detach from the console")},
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{ oNoGrab, "no-grab" ,0, N_("do not grab keyboard and mouse")},
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{ oLogFile, "log-file" ,2, N_("use a log file for the server")},
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{ oDisablePth, "disable-pth", 0, N_("do not allow multiple connections")},
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{ oPinentryProgram, "pinentry-program", 2 , "path to PIN Entry program" },
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{ oDisplay, "display", 2, "set the display" },
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{ oTTYname, "ttyname", 2, "set the tty terminal node name" },
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{ oTTYtype, "ttytype", 2, "set the tty terminal type" },
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{ oLCctype, "lc-ctype", 2, "set the tty LC_CTYPE value" },
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{ oLCmessages, "lc-messages", 2, "set the tty LC_MESSAGES value" },
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{ oScdaemonProgram, "scdaemon-program", 2 , "path to SCdaemon program" },
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{ oDefCacheTTL, "default-cache-ttl", 4,
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"|N|expire cached PINs after N seconds"},
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{ oIgnoreCacheForSigning, "ignore-cache-for-signing", 0,
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"do not use the PIN cache when signing"},
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{ oKeepTTY, "keep-tty", 0, N_("ignore requests to change the TTY")},
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{ oKeepDISPLAY, "keep-display",
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0, N_("ignore requests to change the X display")},
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{0}
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};
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#define DEFAULT_CACHE_TTL (10*60) /* 10 minutes */
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static volatile int caught_fatal_sig = 0;
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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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/* Name of the communication socket */
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static char socket_name[128];
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/* Default values for options passed to the pinentry. */
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static char *default_display;
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static char *default_ttyname;
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static char *default_ttytype;
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static char *default_lc_ctype;
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static char *default_lc_messages;
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/* Name of a config file, which will be reread on a HUP if it is not NULL. */
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static char *config_filename;
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/* Helper to implement --debug-level */
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static const char *debug_level;
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/* Local prototypes. */
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static void create_directories (void);
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#ifdef USE_GNU_PTH
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static void handle_connections (int listen_fd);
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/* Pth wrapper function definitions. */
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GCRY_THREAD_OPTION_PTH_IMPL;
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#endif /*USE_GNU_PTH*/
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static const char *
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my_strusage (int level)
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{
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const char *p;
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switch (level)
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{
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case 11: p = "gpg-agent (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 <" PACKAGE_BUGREPORT ">.\n");
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break;
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case 1:
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case 40: p = _("Usage: gpg-agent [options] (-h for help)");
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break;
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case 41: p = _("Syntax: gpg-agent [options] [command [args]]\n"
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"Secret key management for GnuPG\n");
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break;
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default: p = NULL;
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}
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return p;
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}
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static void
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i18n_init (void)
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{
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#ifdef USE_SIMPLE_GETTEXT
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set_gettext_file( PACKAGE_GT );
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#else
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#ifdef ENABLE_NLS
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setlocale (LC_ALL, "");
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bindtextdomain (PACKAGE_GT, LOCALEDIR);
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textdomain (PACKAGE_GT);
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#endif
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#endif
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}
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/* Used by gcry for logging */
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static void
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my_gcry_logger (void *dummy, int level, const char *fmt, va_list arg_ptr)
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{
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/* translate the log levels */
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switch (level)
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{
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case GCRY_LOG_CONT: level = JNLIB_LOG_CONT; break;
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case GCRY_LOG_INFO: level = JNLIB_LOG_INFO; break;
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case GCRY_LOG_WARN: level = JNLIB_LOG_WARN; break;
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case GCRY_LOG_ERROR:level = JNLIB_LOG_ERROR; break;
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case GCRY_LOG_FATAL:level = JNLIB_LOG_FATAL; break;
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case GCRY_LOG_BUG: level = JNLIB_LOG_BUG; break;
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case GCRY_LOG_DEBUG:level = JNLIB_LOG_DEBUG; break;
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default: level = JNLIB_LOG_ERROR; break;
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}
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log_logv (level, fmt, arg_ptr);
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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. Note that we don't fail here, because it is important to keep
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gpg-agent running even after re-reading the options due to a
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SIGHUP. */
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static void
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set_debug (void)
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{
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if (!debug_level)
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;
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else if (!strcmp (debug_level, "none"))
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opt.debug = 0;
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else if (!strcmp (debug_level, "basic"))
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opt.debug = DBG_ASSUAN_VALUE;
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else if (!strcmp (debug_level, "advanced"))
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opt.debug = DBG_ASSUAN_VALUE|DBG_COMMAND_VALUE;
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else if (!strcmp (debug_level, "expert"))
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opt.debug = (DBG_ASSUAN_VALUE|DBG_COMMAND_VALUE
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|DBG_CACHE_VALUE);
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else if (!strcmp (debug_level, "guru"))
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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"), debug_level);
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opt.debug = 0; /* Reset debugging, so that prior debug
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statements won't have an undesired effect. */
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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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}
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static void
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cleanup (void)
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{
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if (*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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static RETSIGTYPE
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cleanup_sh (int sig)
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{
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if (caught_fatal_sig)
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raise (sig);
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caught_fatal_sig = 1;
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/* gcry_control( GCRYCTL_TERM_SECMEM );*/
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cleanup ();
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#ifndef HAVE_DOSISH_SYSTEM
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{ /* reset action to default action and raise signal again */
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struct sigaction nact;
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nact.sa_handler = SIG_DFL;
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sigemptyset( &nact.sa_mask );
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nact.sa_flags = 0;
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sigaction( sig, &nact, NULL);
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}
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#endif
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raise( sig );
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}
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/* Handle options which are allowed to be reset after program start.
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Return true when the current option in PARGS could be handled and
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false if not. As a special feature, passing a value of NULL for
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PARGS, resets the options to the default. */
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static int
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parse_rereadable_options (ARGPARSE_ARGS *pargs)
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{
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if (!pargs)
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{ /* reset mode */
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opt.quiet = 0;
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opt.verbose = 0;
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opt.debug = 0;
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opt.no_grab = 0;
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opt.pinentry_program = NULL;
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opt.scdaemon_program = NULL;
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opt.def_cache_ttl = DEFAULT_CACHE_TTL;
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opt.ignore_cache_for_signing = 0;
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return 1;
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}
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switch (pargs->r_opt)
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{
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case oQuiet: opt.quiet = 1; break;
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case oVerbose: opt.verbose++; break;
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case oDebug: opt.debug |= pargs->r.ret_ulong; break;
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case oDebugAll: opt.debug = ~0; break;
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case oDebugLevel: debug_level = pargs->r.ret_str; break;
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case oNoGrab: opt.no_grab = 1; break;
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case oPinentryProgram: opt.pinentry_program = pargs->r.ret_str; break;
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case oScdaemonProgram: opt.scdaemon_program = pargs->r.ret_str; break;
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case oDefCacheTTL: opt.def_cache_ttl = pargs->r.ret_ulong; break;
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case oIgnoreCacheForSigning: opt.ignore_cache_for_signing = 1; break;
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default:
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return 0; /* not handled */
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}
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return 1; /* handled */
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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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int may_coredump;
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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 configlineno;
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int parse_debug = 0;
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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 pipe_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 disable_pth = 0;
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int gpgconf_list = 0;
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gpg_error_t err;
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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 ("gpg-agent", JNLIB_LOG_WITH_PREFIX|JNLIB_LOG_WITH_PID);
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/* Try to auto set the character set. */
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set_native_charset (NULL);
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i18n_init ();
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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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#ifdef USE_GNU_PTH
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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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#endif /*USE_GNU_PTH*/
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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( _("libgcrypt is too old (need %s, have %s)\n"),
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NEED_LIBGCRYPT_VERSION, gcry_check_version (NULL) );
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}
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assuan_set_malloc_hooks (gcry_malloc, gcry_realloc, gcry_free);
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assuan_set_assuan_log_stream (log_get_stream ());
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assuan_set_assuan_log_prefix (log_get_prefix (NULL));
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gcry_set_log_handler (my_gcry_logger, NULL);
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gcry_control (GCRYCTL_USE_SECURE_RNDPOOL);
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may_coredump = disable_core_dumps ();
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parse_rereadable_options (NULL); /* Reset them to default values. */
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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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opt.homedir = getenv("GNUPGHOME");
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if (!opt.homedir || !*opt.homedir)
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opt.homedir = GNUPG_DEFAULT_HOMEDIR;
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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= 1|(1<<6); /* do not remove the args, ignore version */
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while (arg_parse( &pargs, opts))
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{
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if (pargs.r_opt == oDebug || pargs.r_opt == oDebugAll)
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parse_debug++;
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else if (pargs.r_opt == oOptions)
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{ /* yes there is one, so we do not try the default one, but
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read the option file when it is encountered at the
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commandline */
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default_config = 0;
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}
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else if (pargs.r_opt == oNoOptions)
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default_config = 0; /* --no-options */
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else if (pargs.r_opt == oHomedir)
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opt.homedir = pargs.r.ret_str;
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}
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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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Now we are now working under our real uid
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*/
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if (default_config)
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configname = make_filename (opt.homedir, "gpg-agent.conf", NULL );
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argc = orig_argc;
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argv = orig_argv;
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pargs.argc = &argc;
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pargs.argv = &argv;
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pargs.flags= 1; /* do not remove the args */
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next_pass:
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if (configname)
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{
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configlineno = 0;
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configfp = fopen (configname, "r");
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if (!configfp)
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{
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if (default_config)
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{
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if( parse_debug )
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log_info (_("NOTE: no default option file `%s'\n"),
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configname );
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}
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else
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{
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log_error (_("option file `%s': %s\n"),
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configname, strerror(errno) );
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exit(2);
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}
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xfree (configname);
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configname = NULL;
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}
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if (parse_debug && configname )
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log_info (_("reading options from `%s'\n"), configname );
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default_config = 0;
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}
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while (optfile_parse( configfp, configname, &configlineno, &pargs, opts) )
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{
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if (parse_rereadable_options (&pargs))
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continue; /* Already handled */
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switch (pargs.r_opt)
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{
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|
case aGPGConfList: gpgconf_list = 1; break;
|
|
case oBatch: opt.batch=1; break;
|
|
|
|
case oDebugWait: debug_wait = pargs.r.ret_int; 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 oDaemon: is_daemon = 1; break;
|
|
case oDisablePth: disable_pth = 1; break;
|
|
|
|
case oDisplay: default_display = xstrdup (pargs.r.ret_str); break;
|
|
case oTTYname: default_ttyname = xstrdup (pargs.r.ret_str); break;
|
|
case oTTYtype: default_ttytype = xstrdup (pargs.r.ret_str); break;
|
|
case oLCctype: default_lc_ctype = xstrdup (pargs.r.ret_str); break;
|
|
case oLCmessages: default_lc_messages = xstrdup (pargs.r.ret_str);
|
|
break;
|
|
|
|
case oKeepTTY: opt.keep_tty = 1; break;
|
|
case oKeepDISPLAY: opt.keep_display = 1; break;
|
|
|
|
default : pargs.err = configfp? 1:2; break;
|
|
}
|
|
}
|
|
if (configfp)
|
|
{
|
|
fclose( configfp );
|
|
configfp = NULL;
|
|
/* Keep a copy of the name so that it can be read on SIGHUP. */
|
|
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
|
|
|
|
set_debug ();
|
|
|
|
if (atexit (cleanup))
|
|
{
|
|
log_error ("atexit failed\n");
|
|
cleanup ();
|
|
exit (1);
|
|
}
|
|
|
|
create_directories ();
|
|
|
|
if (debug_wait && pipe_server)
|
|
{
|
|
log_debug ("waiting for debugger - my pid is %u .....\n",
|
|
(unsigned int)getpid());
|
|
sleep (debug_wait);
|
|
log_debug ("... okay\n");
|
|
}
|
|
|
|
if (gpgconf_list)
|
|
{
|
|
char *filename;
|
|
|
|
/* List options and default values in the GPG Conf format. */
|
|
|
|
/* The following list is taken from gnupg/tools/gpgconf-comp.c. */
|
|
/* Option flags. YOU MUST NOT CHANGE THE NUMBERS OF THE EXISTING
|
|
FLAGS, AS THEY ARE PART OF THE EXTERNAL INTERFACE. */
|
|
#define GC_OPT_FLAG_NONE 0UL
|
|
/* The RUNTIME flag for an option indicates that the option can be
|
|
changed at runtime. */
|
|
#define GC_OPT_FLAG_RUNTIME (1UL << 3)
|
|
/* The DEFAULT flag for an option indicates that the option has a
|
|
default value. */
|
|
#define GC_OPT_FLAG_DEFAULT (1UL << 4)
|
|
/* The DEF_DESC flag for an option indicates that the option has a
|
|
default, which is described by the value of the default field. */
|
|
#define GC_OPT_FLAG_DEF_DESC (1UL << 5)
|
|
/* The NO_ARG_DESC flag for an option indicates that the argument has
|
|
a default, which is described by the value of the ARGDEF field. */
|
|
#define GC_OPT_FLAG_NO_ARG_DESC (1UL << 6)
|
|
|
|
filename = make_filename (opt.homedir, "gpg-agent.conf", NULL );
|
|
printf ("gpgconf-gpg-agent.conf:%lu:\"%s\n",
|
|
GC_OPT_FLAG_DEFAULT, filename);
|
|
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_RUNTIME,
|
|
GC_OPT_FLAG_NONE|GC_OPT_FLAG_RUNTIME,
|
|
GC_OPT_FLAG_DEFAULT|GC_OPT_FLAG_RUNTIME,
|
|
GC_OPT_FLAG_NONE );
|
|
printf ("default-cache-ttl:%lu:%d:\n",
|
|
GC_OPT_FLAG_DEFAULT|GC_OPT_FLAG_RUNTIME, DEFAULT_CACHE_TTL );
|
|
printf ("no-grab:%lu:\n",
|
|
GC_OPT_FLAG_NONE|GC_OPT_FLAG_RUNTIME);
|
|
printf ("ignore-cache-for-signing:%lu:\n",
|
|
GC_OPT_FLAG_NONE|GC_OPT_FLAG_RUNTIME);
|
|
|
|
agent_exit (0);
|
|
}
|
|
|
|
if (!pipe_server && !is_daemon)
|
|
log_info (_("please use the option `--daemon'"
|
|
" to run the program in the background\n"));
|
|
|
|
#ifdef ENABLE_NLS
|
|
/* gpg-agent usually does not output any messages because it runs in
|
|
the background. For log files it is acceptable to have messages
|
|
always encoded in utf-8. We switch here to utf-8, so that
|
|
commands like --help still give native messages. It is far
|
|
easier to switch only once instead of for every message and it
|
|
actually helps when more then one thread is active (avoids an
|
|
extra copy step). */
|
|
bind_textdomain_codeset (PACKAGE_GT, "UTF-8");
|
|
#endif
|
|
|
|
/* Now start with logging to a file if this is desired. */
|
|
if (logfile)
|
|
{
|
|
log_set_file (logfile);
|
|
log_set_prefix (NULL, (JNLIB_LOG_WITH_PREFIX
|
|
|JNLIB_LOG_WITH_TIME
|
|
|JNLIB_LOG_WITH_PID));
|
|
}
|
|
|
|
/* Make sure that we have a default ttyname. */
|
|
if (!default_ttyname && ttyname (1))
|
|
default_ttyname = xstrdup (ttyname (1));
|
|
if (!default_ttytype && getenv ("TERM"))
|
|
default_ttytype = xstrdup (getenv ("TERM"));
|
|
|
|
if (pipe_server)
|
|
{ /* this is the simple pipe based server */
|
|
start_command_handler (-1, -1);
|
|
}
|
|
else if (!is_daemon)
|
|
;
|
|
else
|
|
{ /* regular server mode */
|
|
int fd;
|
|
pid_t pid;
|
|
int len;
|
|
struct sockaddr_un serv_addr;
|
|
char *p;
|
|
|
|
/* Remove the DISPLAY variable so that a pinentry does not
|
|
default to a specific display. There is still a default
|
|
display when gpg-agent weas started using --display or a
|
|
client requested this using an OPTION command. */
|
|
if (!opt.keep_display)
|
|
unsetenv ("DISPLAY");
|
|
|
|
*socket_name = 0;
|
|
snprintf (socket_name, DIM(socket_name)-1,
|
|
"/tmp/gpg-XXXXXX/S.gpg-agent");
|
|
socket_name[DIM(socket_name)-1] = 0;
|
|
p = strrchr (socket_name, '/');
|
|
if (!p)
|
|
BUG ();
|
|
*p = 0;;
|
|
if (!mkdtemp(socket_name))
|
|
{
|
|
log_error ("can't create directory `%s': %s\n",
|
|
socket_name, strerror(errno) );
|
|
exit (1);
|
|
}
|
|
*p = '/';
|
|
|
|
if (strchr (socket_name, ':') )
|
|
{
|
|
log_error ("colons are not allowed in the socket name\n");
|
|
exit (1);
|
|
}
|
|
if (strlen (socket_name)+1 >= sizeof serv_addr.sun_path )
|
|
{
|
|
log_error ("name of socket too long\n");
|
|
exit (1);
|
|
}
|
|
|
|
|
|
fd = socket (AF_UNIX, SOCK_STREAM, 0);
|
|
if (fd == -1)
|
|
{
|
|
log_error ("can't create socket: %s\n", strerror(errno) );
|
|
exit (1);
|
|
}
|
|
|
|
memset (&serv_addr, 0, sizeof serv_addr);
|
|
serv_addr.sun_family = AF_UNIX;
|
|
strcpy (serv_addr.sun_path, socket_name);
|
|
len = (offsetof (struct sockaddr_un, sun_path)
|
|
+ strlen(serv_addr.sun_path) + 1);
|
|
|
|
if (bind (fd, (struct sockaddr*)&serv_addr, len) == -1)
|
|
{
|
|
log_error ("error binding socket to `%s': %s\n",
|
|
serv_addr.sun_path, strerror (errno) );
|
|
close (fd);
|
|
exit (1);
|
|
}
|
|
|
|
if (listen (fd, 5 ) == -1)
|
|
{
|
|
log_error ("listen() failed: %s\n", strerror (errno));
|
|
close (fd);
|
|
exit (1);
|
|
}
|
|
|
|
if (opt.verbose)
|
|
log_info ("listening on socket `%s'\n", socket_name );
|
|
|
|
|
|
fflush (NULL);
|
|
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 (asprintf (&infostr, "GPG_AGENT_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 GPG_AGENT_INFO;\n", infostr);
|
|
}
|
|
free (infostr);
|
|
exit (0);
|
|
}
|
|
/*NEVER REACHED*/
|
|
} /* end parent */
|
|
|
|
|
|
/*
|
|
This is the child
|
|
*/
|
|
|
|
/* Detach from tty and put process into a new session */
|
|
if (!nodetach )
|
|
{
|
|
int i;
|
|
unsigned int oldflags;
|
|
|
|
/* Close stdin, stdout and stderr unless it is the log stream */
|
|
for (i=0; i <= 2; i++)
|
|
{
|
|
if (!log_test_fd (i) )
|
|
close (i);
|
|
}
|
|
if (setsid() == -1)
|
|
{
|
|
log_error ("setsid() failed: %s\n", strerror(errno) );
|
|
cleanup ();
|
|
exit (1);
|
|
}
|
|
|
|
log_get_prefix (&oldflags);
|
|
log_set_prefix (NULL, oldflags | JNLIB_LOG_RUN_DETACHED);
|
|
opt.running_detached = 1;
|
|
}
|
|
|
|
if (chdir("/"))
|
|
{
|
|
log_error ("chdir to / failed: %s\n", strerror (errno));
|
|
exit (1);
|
|
}
|
|
|
|
|
|
#ifdef USE_GNU_PTH
|
|
if (!disable_pth)
|
|
{
|
|
struct sigaction sa;
|
|
|
|
sa.sa_handler = SIG_IGN;
|
|
sigemptyset (&sa.sa_mask);
|
|
sa.sa_flags = 0;
|
|
sigaction (SIGPIPE, &sa, NULL);
|
|
handle_connections (fd);
|
|
}
|
|
else
|
|
#endif /*!USE_GNU_PTH*/
|
|
/* setup signals */
|
|
{
|
|
struct sigaction oact, nact;
|
|
|
|
nact.sa_handler = cleanup_sh;
|
|
sigemptyset (&nact.sa_mask);
|
|
nact.sa_flags = 0;
|
|
|
|
sigaction (SIGHUP, NULL, &oact);
|
|
if (oact.sa_handler != SIG_IGN)
|
|
sigaction (SIGHUP, &nact, NULL);
|
|
sigaction( SIGTERM, NULL, &oact );
|
|
if (oact.sa_handler != SIG_IGN)
|
|
sigaction (SIGTERM, &nact, NULL);
|
|
nact.sa_handler = SIG_IGN;
|
|
sigaction (SIGPIPE, &nact, NULL);
|
|
sigaction (SIGINT, &nact, NULL);
|
|
|
|
start_command_handler (fd, -1);
|
|
}
|
|
close (fd);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
agent_exit (int rc)
|
|
{
|
|
/*FIXME: update_random_seed_file();*/
|
|
#if 1
|
|
/* 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);
|
|
}
|
|
|
|
|
|
void
|
|
agent_init_default_ctrl (struct server_control_s *ctrl)
|
|
{
|
|
ctrl->connection_fd = -1;
|
|
|
|
/* Note we ignore malloc errors because we can't do much about it
|
|
and the request will fail anyway shortly after this
|
|
initialization. */
|
|
if (ctrl->display)
|
|
free (ctrl->display);
|
|
ctrl->display = default_display? strdup (default_display) : NULL;
|
|
|
|
if (ctrl->ttyname)
|
|
free (ctrl->ttyname);
|
|
ctrl->ttyname = default_ttyname? strdup (default_ttyname) : NULL;
|
|
|
|
if (ctrl->ttytype)
|
|
free (ctrl->ttytype);
|
|
ctrl->ttytype = default_ttytype? strdup (default_ttytype) : NULL;
|
|
|
|
if (ctrl->lc_ctype)
|
|
free (ctrl->lc_ctype);
|
|
ctrl->lc_ctype = default_lc_ctype? strdup (default_lc_ctype) : NULL;
|
|
|
|
if (ctrl->lc_messages)
|
|
free (ctrl->lc_messages);
|
|
ctrl->lc_messages = default_lc_messages? strdup (default_lc_messages) : NULL;
|
|
}
|
|
|
|
|
|
/* Reread parts of the configuration. Note, that this function is
|
|
obviously not thread-safe and should only be called from the PTH
|
|
signal handler.
|
|
|
|
Fixme: Due to the way the argument parsing works, we create a
|
|
memory leak here for all string type arguments. There is currently
|
|
no clean way to tell whether the memory for the argument has been
|
|
allocated or points into the process' original arguments. Unless
|
|
we have a mechanism to tell this, we need to live on with this. */
|
|
static void
|
|
reread_configuration (void)
|
|
{
|
|
ARGPARSE_ARGS pargs;
|
|
FILE *fp;
|
|
unsigned int configlineno = 0;
|
|
int dummy;
|
|
|
|
if (!config_filename)
|
|
return; /* No config file. */
|
|
|
|
fp = fopen (config_filename, "r");
|
|
if (!fp)
|
|
{
|
|
log_error (_("option file `%s': %s\n"),
|
|
config_filename, strerror(errno) );
|
|
return;
|
|
}
|
|
|
|
parse_rereadable_options (NULL); /* Start from the default values. */
|
|
|
|
memset (&pargs, 0, sizeof pargs);
|
|
dummy = 0;
|
|
pargs.argc = &dummy;
|
|
pargs.flags = 1; /* do not remove the args */
|
|
while (optfile_parse (fp, config_filename, &configlineno, &pargs, opts) )
|
|
{
|
|
if (pargs.r_opt < -1)
|
|
pargs.err = 1; /* Print a warning. */
|
|
else /* Try to parse this option - ignore unchangeable ones. */
|
|
parse_rereadable_options (&pargs);
|
|
}
|
|
fclose (fp);
|
|
set_debug ();
|
|
}
|
|
|
|
|
|
static void
|
|
create_private_keys_directory (const char *home)
|
|
{
|
|
char *fname;
|
|
struct stat statbuf;
|
|
|
|
fname = make_filename (home, GNUPG_PRIVATE_KEYS_DIR, NULL);
|
|
if (stat (fname, &statbuf) && errno == ENOENT)
|
|
{
|
|
if (mkdir (fname, S_IRUSR|S_IWUSR|S_IXUSR ))
|
|
log_error (_("can't create directory `%s': %s\n"),
|
|
fname, strerror(errno) );
|
|
else if (!opt.quiet)
|
|
log_info (_("directory `%s' created\n"), fname);
|
|
}
|
|
xfree (fname);
|
|
}
|
|
|
|
/* Create the directory only if the supplied directory name is the
|
|
same as the default one. This way we avoid to create arbitrary
|
|
directories when a non-default home directory is used. To cope
|
|
with HOME, we compare only the suffix if we see that the default
|
|
homedir does start with a tilde. We don't stop here in case of
|
|
problems because other functions will throw an error anyway.*/
|
|
static void
|
|
create_directories (void)
|
|
{
|
|
struct stat statbuf;
|
|
const char *defhome = GNUPG_DEFAULT_HOMEDIR;
|
|
char *home;
|
|
|
|
home = make_filename (opt.homedir, NULL);
|
|
if ( stat (home, &statbuf) )
|
|
{
|
|
if (errno == ENOENT)
|
|
{
|
|
if ( (*defhome == '~'
|
|
&& (strlen (home) >= strlen (defhome+1)
|
|
&& !strcmp (home + strlen(home)
|
|
- strlen (defhome+1), defhome+1)))
|
|
|| (*defhome != '~' && !strcmp (home, defhome) )
|
|
)
|
|
{
|
|
if (mkdir (home, S_IRUSR|S_IWUSR|S_IXUSR ))
|
|
log_error (_("can't create directory `%s': %s\n"),
|
|
home, strerror(errno) );
|
|
else
|
|
{
|
|
if (!opt.quiet)
|
|
log_info (_("directory `%s' created\n"), home);
|
|
create_private_keys_directory (home);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
log_error ("error stat-ing `%s': %s\n", home, strerror (errno));
|
|
}
|
|
else if ( !S_ISDIR(statbuf.st_mode))
|
|
{
|
|
log_error ("can't use `%s' as home directory\n", home);
|
|
}
|
|
else /* exists and is a directory. */
|
|
{
|
|
create_private_keys_directory (home);
|
|
}
|
|
xfree (home);
|
|
}
|
|
|
|
|
|
|
|
#ifdef USE_GNU_PTH
|
|
static void
|
|
handle_signal (int signo)
|
|
{
|
|
switch (signo)
|
|
{
|
|
case SIGHUP:
|
|
log_info ("SIGHUP received - "
|
|
"re-reading configuration and flushing cache\n");
|
|
agent_flush_cache ();
|
|
reread_configuration ();
|
|
break;
|
|
|
|
case SIGUSR1:
|
|
if (opt.verbose < 5)
|
|
opt.verbose++;
|
|
log_info ("SIGUSR1 received - verbosity set to %d\n", opt.verbose);
|
|
break;
|
|
|
|
case SIGUSR2:
|
|
if (opt.verbose)
|
|
opt.verbose--;
|
|
log_info ("SIGUSR2 received - verbosity set to %d\n", opt.verbose );
|
|
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 ();
|
|
agent_exit (0);
|
|
}
|
|
break;
|
|
|
|
case SIGINT:
|
|
log_info ("SIGINT received - immediate shutdown\n");
|
|
log_info( "%s %s stopped\n", strusage(11), strusage(13));
|
|
cleanup ();
|
|
agent_exit (0);
|
|
break;
|
|
|
|
default:
|
|
log_info ("signal %d received - no action defined\n", signo);
|
|
}
|
|
}
|
|
|
|
|
|
static void *
|
|
start_connection_thread (void *arg)
|
|
{
|
|
int fd = (int)arg;
|
|
|
|
if (opt.verbose)
|
|
log_info ("handler for fd %d started\n", fd);
|
|
start_command_handler (-1, fd);
|
|
if (opt.verbose)
|
|
log_info ("handler for fd %d terminated\n", fd);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static void
|
|
handle_connections (int listen_fd)
|
|
{
|
|
pth_attr_t tattr;
|
|
pth_event_t ev;
|
|
sigset_t sigs;
|
|
int signo;
|
|
struct sockaddr_un paddr;
|
|
socklen_t plen = sizeof( paddr );
|
|
int fd;
|
|
|
|
tattr = pth_attr_new();
|
|
pth_attr_set (tattr, PTH_ATTR_JOINABLE, 0);
|
|
pth_attr_set (tattr, PTH_ATTR_STACK_SIZE, 32*1024);
|
|
pth_attr_set (tattr, PTH_ATTR_NAME, "gpg-agent");
|
|
|
|
sigemptyset (&sigs );
|
|
sigaddset (&sigs, SIGHUP);
|
|
sigaddset (&sigs, SIGUSR1);
|
|
sigaddset (&sigs, SIGUSR2);
|
|
sigaddset (&sigs, SIGINT);
|
|
sigaddset (&sigs, SIGTERM);
|
|
ev = pth_event (PTH_EVENT_SIGS, &sigs, &signo);
|
|
|
|
for (;;)
|
|
{
|
|
if (shutdown_pending)
|
|
{
|
|
if (pth_ctrl (PTH_CTRL_GETTHREADS) == 1)
|
|
break; /* ready */
|
|
|
|
/* Do not accept anymore connections and wait for existing
|
|
connections to terminate */
|
|
signo = 0;
|
|
pth_wait (ev);
|
|
if (pth_event_occurred (ev) && signo)
|
|
handle_signal (signo);
|
|
continue;
|
|
}
|
|
|
|
fd = pth_accept_ev (listen_fd, (struct sockaddr *)&paddr, &plen, ev);
|
|
if (fd == -1)
|
|
{
|
|
#ifdef PTH_STATUS_OCCURRED /* This is Pth 2 */
|
|
if (pth_event_status (ev) == PTH_STATUS_OCCURRED)
|
|
#else
|
|
if (pth_event_occurred (ev))
|
|
#endif
|
|
{
|
|
handle_signal (signo);
|
|
continue;
|
|
}
|
|
log_error ("accept failed: %s - waiting 1s\n", strerror (errno));
|
|
pth_sleep(1);
|
|
continue;
|
|
}
|
|
|
|
if (!pth_spawn (tattr, start_connection_thread, (void*)fd))
|
|
{
|
|
log_error ("error spawning connection handler: %s\n",
|
|
strerror (errno) );
|
|
close (fd);
|
|
}
|
|
}
|
|
|
|
pth_event_free (ev, PTH_FREE_ALL);
|
|
cleanup ();
|
|
log_info ("%s %s stopped\n", strusage(11), strusage(13));
|
|
}
|
|
#endif /*USE_GNU_PTH*/
|