mirror of
git://git.gnupg.org/gnupg.git
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1718 lines
50 KiB
C
1718 lines
50 KiB
C
/* gpg-agent.c - The GnuPG Agent
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* Copyright (C) 2000, 2001, 2002, 2003, 2004,
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* 2005 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* 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/stat.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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#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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#ifdef HAVE_W32_SYSTEM
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#include "../jnlib/w32-afunix.h"
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#endif
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#include "setenv.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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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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oDefCacheTTLSSH,
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oMaxCacheTTL,
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oMaxCacheTTLSSH,
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oUseStandardSocket,
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oNoUseStandardSocket,
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oIgnoreCacheForSigning,
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oAllowMarkTrusted,
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oAllowPresetPassphrase,
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oKeepTTY,
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oKeepDISPLAY,
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oSSHSupport,
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oDisableScdaemon,
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oWriteEnvFile
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};
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static ARGPARSE_OPTS opts[] = {
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{ aGPGConfList, "gpgconf-list", 256, "@" },
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{ aGPGConfTest, "gpgconf-test", 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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{ oUseStandardSocket, "use-standard-socket", 0,
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N_("use a standard location for the socket")},
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{ oNoUseStandardSocket, "no-use-standard-socket", 0, "@"},
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{ oPinentryProgram, "pinentry-program", 2 ,
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N_("|PGM|use PGM as the PIN-Entry program") },
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{ oScdaemonProgram, "scdaemon-program", 2 ,
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N_("|PGM|use PGM as the SCdaemon program") },
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{ oDisableScdaemon, "disable-scdaemon", 0, N_("do not use the SCdaemon") },
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{ oDisplay, "display", 2, "@" },
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{ oTTYname, "ttyname", 2, "@" },
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{ oTTYtype, "ttytype", 2, "@" },
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{ oLCctype, "lc-ctype", 2, "@" },
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{ oLCmessages, "lc-messages", 2, "@" },
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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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{ oDefCacheTTL, "default-cache-ttl", 4,
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N_("|N|expire cached PINs after N seconds")},
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{ oDefCacheTTLSSH, "default-cache-ttl-ssh", 4, "@" },
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{ oMaxCacheTTL, "max-cache-ttl", 4, "@" },
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{ oMaxCacheTTLSSH, "max-cache-ttl-ssh", 4, "@" },
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{ oIgnoreCacheForSigning, "ignore-cache-for-signing", 0,
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N_("do not use the PIN cache when signing")},
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{ oAllowMarkTrusted, "allow-mark-trusted", 0,
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N_("allow clients to mark keys as \"trusted\"")},
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{ oAllowPresetPassphrase, "allow-preset-passphrase", 0,
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N_("allow presetting passphrase")},
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{ oSSHSupport, "enable-ssh-support", 0, N_("enable ssh-agent emulation") },
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{ oWriteEnvFile, "write-env-file", 2|8,
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N_("|FILE|write environment settings also to FILE")},
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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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#define DEFAULT_CACHE_TTL_SSH (30*60) /* 30 minutes */
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#define MAX_CACHE_TTL (120*60) /* 2 hours */
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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 used for native gpg-agent requests. */
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static char *socket_name;
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/* Name of the communication socket used for ssh-agent-emulation. */
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static char *socket_name_ssh;
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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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/* Keep track of the current log file so that we can avoid updating
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the log file after a SIGHUP if it didn't changed. Malloced. */
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static char *current_logfile;
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/* The handle_tick() function may test whether a parent is still
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running. We record the PID of the parent here or -1 if it should be
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watched. */
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static pid_t parent_pid = (pid_t)(-1);
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/*
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Local prototypes.
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*/
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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 int create_server_socket (int is_standard_name, const char *name);
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static void create_directories (void);
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static void handle_connections (int listen_fd, int listen_fd_ssh);
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static int check_for_running_agent (int);
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/* Pth wrapper function definitions. */
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GCRY_THREAD_OPTION_PTH_IMPL;
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/*
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Functions.
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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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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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/* This function is called by libgcrypt if it ran out of core and
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there is no way to return that error to the caller. We do our own
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function here to make use of our logging functions. */
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static int
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my_gcry_outofcore_handler ( void *opaque, size_t req_n, unsigned int flags)
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{
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static int been_here; /* Used to protect against recursive calls. */
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if (!been_here)
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{
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been_here = 1;
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if ( (flags & 1) )
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log_fatal (_("out of core in secure memory "
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"while allocating %lu bytes"), (unsigned long)req_n);
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else
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log_fatal (_("out of core while allocating %lu bytes"),
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(unsigned long)req_n);
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}
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return 0; /* Let libgcrypt call its own fatal error handler. */
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}
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/* Setup the debugging. With the global variable DEBUG_LEVEL set to NULL
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only the active debug flags are propagated to the subsystems. With
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DEBUG_LEVEL set, a specific set of debug flags is set; thus overriding
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all flags already set. Note that we don't fail here, because it is
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important to keep gpg-agent running even after re-reading the
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options due to a SIGHUP. */
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static void
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set_debug (void)
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{
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if (!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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/* Helper for cleanup to remove one socket with NAME. */
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static void
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remove_socket (char *name)
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{
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if (name && *name)
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{
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char *p;
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remove (name);
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p = strrchr (name, '/');
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if (p)
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{
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*p = 0;
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rmdir (name);
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*p = '/';
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}
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*name = 0;
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}
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}
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static void
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cleanup (void)
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{
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remove_socket (socket_name);
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remove_socket (socket_name_ssh);
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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. REREAD should be set
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true if it is not the initial option parsing. */
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static int
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parse_rereadable_options (ARGPARSE_ARGS *pargs, int reread)
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{
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if (!pargs)
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{ /* reset mode */
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opt.quiet = 0;
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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.def_cache_ttl_ssh = DEFAULT_CACHE_TTL_SSH;
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opt.max_cache_ttl = MAX_CACHE_TTL;
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opt.max_cache_ttl_ssh = MAX_CACHE_TTL;
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opt.ignore_cache_for_signing = 0;
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opt.allow_mark_trusted = 0;
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opt.disable_scdaemon = 0;
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return 1;
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}
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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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|
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case oDebug: opt.debug |= pargs->r.ret_ulong; break;
|
||
case oDebugAll: opt.debug = ~0; break;
|
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case oDebugLevel: debug_level = pargs->r.ret_str; break;
|
||
|
||
case oLogFile:
|
||
if (!reread)
|
||
return 0; /* not handeld */
|
||
if (!current_logfile || !pargs->r.ret_str
|
||
|| strcmp (current_logfile, pargs->r.ret_str))
|
||
{
|
||
log_set_file (pargs->r.ret_str);
|
||
xfree (current_logfile);
|
||
current_logfile = xtrystrdup (pargs->r.ret_str);
|
||
}
|
||
break;
|
||
|
||
case oNoGrab: opt.no_grab = 1; break;
|
||
|
||
case oPinentryProgram: opt.pinentry_program = pargs->r.ret_str; break;
|
||
case oScdaemonProgram: opt.scdaemon_program = pargs->r.ret_str; break;
|
||
case oDisableScdaemon: opt.disable_scdaemon = 1; break;
|
||
|
||
case oDefCacheTTL: opt.def_cache_ttl = pargs->r.ret_ulong; break;
|
||
case oDefCacheTTLSSH: opt.def_cache_ttl_ssh = pargs->r.ret_ulong; break;
|
||
case oMaxCacheTTL: opt.max_cache_ttl = pargs->r.ret_ulong; break;
|
||
case oMaxCacheTTLSSH: opt.max_cache_ttl_ssh = pargs->r.ret_ulong; break;
|
||
|
||
case oIgnoreCacheForSigning: opt.ignore_cache_for_signing = 1; break;
|
||
|
||
case oAllowMarkTrusted: opt.allow_mark_trusted = 1; break;
|
||
|
||
case oAllowPresetPassphrase: opt.allow_preset_passphrase = 1; break;
|
||
|
||
default:
|
||
return 0; /* not handled */
|
||
}
|
||
|
||
return 1; /* handled */
|
||
}
|
||
|
||
|
||
int
|
||
main (int argc, char **argv )
|
||
{
|
||
ARGPARSE_ARGS pargs;
|
||
int orig_argc;
|
||
int may_coredump;
|
||
char **orig_argv;
|
||
FILE *configfp = NULL;
|
||
char *configname = NULL;
|
||
const char *shell;
|
||
unsigned configlineno;
|
||
int parse_debug = 0;
|
||
int default_config =1;
|
||
int greeting = 0;
|
||
int nogreeting = 0;
|
||
int pipe_server = 0;
|
||
int is_daemon = 0;
|
||
int nodetach = 0;
|
||
int csh_style = 0;
|
||
char *logfile = NULL;
|
||
int debug_wait = 0;
|
||
int gpgconf_list = 0;
|
||
int standard_socket = 0;
|
||
gpg_error_t err;
|
||
const char *env_file_name = NULL;
|
||
|
||
set_strusage (my_strusage);
|
||
gcry_control (GCRYCTL_SUSPEND_SECMEM_WARN);
|
||
/* Please note that we may running SUID(ROOT), so be very CAREFUL
|
||
when adding any stuff between here and the call to INIT_SECMEM()
|
||
somewhere after the option parsing */
|
||
log_set_prefix ("gpg-agent", JNLIB_LOG_WITH_PREFIX|JNLIB_LOG_WITH_PID);
|
||
|
||
/* Try to auto set the character set. */
|
||
set_native_charset (NULL);
|
||
|
||
i18n_init ();
|
||
|
||
/* Libgcrypt requires us to register the threading model first.
|
||
Note that this will also do the pth_init. */
|
||
err = gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pth);
|
||
if (err)
|
||
{
|
||
log_fatal ("can't register GNU Pth with Libgcrypt: %s\n",
|
||
gpg_strerror (err));
|
||
}
|
||
|
||
|
||
/* Check that the libraries are suitable. Do it here because
|
||
the option parsing may need services of the library. */
|
||
if (!gcry_check_version (NEED_LIBGCRYPT_VERSION) )
|
||
{
|
||
log_fatal( _("libgcrypt is too old (need %s, have %s)\n"),
|
||
NEED_LIBGCRYPT_VERSION, gcry_check_version (NULL) );
|
||
}
|
||
|
||
assuan_set_malloc_hooks (gcry_malloc, gcry_realloc, gcry_free);
|
||
assuan_set_assuan_log_stream (log_get_stream ());
|
||
assuan_set_assuan_log_prefix (log_get_prefix (NULL));
|
||
assuan_set_assuan_err_source (GPG_ERR_SOURCE_DEFAULT);
|
||
|
||
gcry_set_log_handler (my_gcry_logger, NULL);
|
||
gcry_set_outofcore_handler (my_gcry_outofcore_handler, NULL);
|
||
gcry_control (GCRYCTL_USE_SECURE_RNDPOOL);
|
||
|
||
may_coredump = disable_core_dumps ();
|
||
|
||
/* Set default options. */
|
||
parse_rereadable_options (NULL, 0); /* Reset them to default values. */
|
||
#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 ();
|
||
|
||
/* Record some of the original environment strings. */
|
||
opt.startup_display = getenv ("DISPLAY");
|
||
if (opt.startup_display)
|
||
opt.startup_display = xstrdup (opt.startup_display);
|
||
opt.startup_ttyname = ttyname (0);
|
||
if (opt.startup_ttyname)
|
||
opt.startup_ttyname = xstrdup (opt.startup_ttyname);
|
||
opt.startup_ttytype = getenv ("TERM");
|
||
if (opt.startup_ttytype)
|
||
opt.startup_ttytype = xstrdup (opt.startup_ttytype);
|
||
/* Fixme: Better use the locale function here. */
|
||
opt.startup_lc_ctype = getenv ("LC_CTYPE");
|
||
if (opt.startup_lc_ctype)
|
||
opt.startup_lc_ctype = xstrdup (opt.startup_lc_ctype);
|
||
opt.startup_lc_messages = getenv ("LC_MESSAGES");
|
||
if (opt.startup_lc_messages)
|
||
opt.startup_lc_messages = xstrdup (opt.startup_lc_messages);
|
||
|
||
/* 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, 32768, 0);
|
||
maybe_setuid = 0;
|
||
|
||
/*
|
||
Now we are now working under our real uid
|
||
*/
|
||
|
||
if (default_config)
|
||
configname = make_filename (opt.homedir, "gpg-agent.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) )
|
||
{
|
||
if (parse_rereadable_options (&pargs, 0))
|
||
continue; /* Already handled */
|
||
switch (pargs.r_opt)
|
||
{
|
||
case aGPGConfList: gpgconf_list = 1; break;
|
||
case aGPGConfTest: gpgconf_list = 2; break;
|
||
case 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 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 oUseStandardSocket: standard_socket = 1; break;
|
||
case oNoUseStandardSocket: standard_socket = 0; break;
|
||
|
||
case oKeepTTY: opt.keep_tty = 1; break;
|
||
case oKeepDISPLAY: opt.keep_display = 1; break;
|
||
|
||
case oSSHSupport: opt.ssh_support = 1; break;
|
||
case oWriteEnvFile:
|
||
if (pargs.r_type)
|
||
env_file_name = pargs.r.ret_str;
|
||
else
|
||
env_file_name = make_filename ("~/.gpg-agent-info", NULL);
|
||
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
|
||
/* We don't want to print it here because gpg-agent is useful of its
|
||
own and quite matured. */
|
||
/*log_info ("NOTE: this is a development version!\n");*/
|
||
#endif
|
||
|
||
set_debug ();
|
||
|
||
if (atexit (cleanup))
|
||
{
|
||
log_error ("atexit failed\n");
|
||
cleanup ();
|
||
exit (1);
|
||
}
|
||
|
||
initialize_module_query ();
|
||
initialize_module_call_scd ();
|
||
|
||
/* Try to create missing directories. */
|
||
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 == 2)
|
||
agent_exit (0);
|
||
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|GC_OPT_FLAG_RUNTIME );
|
||
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);
|
||
printf ("allow-mark-trusted:%lu:\n",
|
||
GC_OPT_FLAG_NONE|GC_OPT_FLAG_RUNTIME);
|
||
printf ("disable-scdaemon:%lu:\n",
|
||
GC_OPT_FLAG_NONE|GC_OPT_FLAG_RUNTIME);
|
||
|
||
agent_exit (0);
|
||
}
|
||
|
||
/* If this has been called without any options, we merely check
|
||
whether an agent is already running. We do this here so that we
|
||
don't clobber a logfile but print it directly to stderr. */
|
||
if (!pipe_server && !is_daemon)
|
||
{
|
||
log_set_prefix (NULL, JNLIB_LOG_WITH_PREFIX);
|
||
check_for_running_agent (0);
|
||
agent_exit (0);
|
||
}
|
||
|
||
#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));
|
||
current_logfile = xstrdup (logfile);
|
||
}
|
||
|
||
/* 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)
|
||
; /* NOTREACHED */
|
||
else
|
||
{ /* Regular server mode */
|
||
int fd;
|
||
int fd_ssh;
|
||
pid_t pid;
|
||
|
||
/* Remove the DISPLAY variable so that a pinentry does not
|
||
default to a specific display. There is still a default
|
||
display when gpg-agent was started using --display or a
|
||
client requested this using an OPTION command. Note, that we
|
||
don't do this when running in reverse daemon mode (i.e. when
|
||
exec the program given as arguments). */
|
||
#ifndef HAVE_W32_SYSTEM
|
||
if (!opt.keep_display && !argc)
|
||
unsetenv ("DISPLAY");
|
||
#endif
|
||
|
||
|
||
/* Create the sockets. */
|
||
socket_name = create_socket_name (standard_socket,
|
||
"S.gpg-agent",
|
||
"/tmp/gpg-XXXXXX/S.gpg-agent");
|
||
if (opt.ssh_support)
|
||
socket_name_ssh = create_socket_name (standard_socket,
|
||
"S.gpg-agent.ssh",
|
||
"/tmp/gpg-XXXXXX/S.gpg-agent.ssh");
|
||
|
||
fd = create_server_socket (standard_socket, socket_name);
|
||
if (opt.ssh_support)
|
||
fd_ssh = create_server_socket (standard_socket, socket_name_ssh);
|
||
else
|
||
fd_ssh = -1;
|
||
|
||
/* If we are going to exec a program in the parent, we record
|
||
the PID, so that the child may check whether the program is
|
||
still alive. */
|
||
if (argc)
|
||
parent_pid = getpid ();
|
||
|
||
fflush (NULL);
|
||
#ifdef HAVE_W32_SYSTEM
|
||
pid = getpid ();
|
||
printf ("set GPG_AGENT_INFO=%s;%lu;1\n", socket_name, (ulong)pid);
|
||
#else /*!HAVE_W32_SYSTEM*/
|
||
pid = fork ();
|
||
if (pid == (pid_t)-1)
|
||
{
|
||
log_fatal ("fork failed: %s\n", strerror (errno) );
|
||
exit (1);
|
||
}
|
||
else if (pid)
|
||
{ /* We are the parent */
|
||
char *infostr, *infostr_ssh_sock, *infostr_ssh_pid;
|
||
|
||
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);
|
||
}
|
||
if (opt.ssh_support)
|
||
{
|
||
if (asprintf (&infostr_ssh_sock, "SSH_AUTH_SOCK=%s",
|
||
socket_name_ssh) < 0)
|
||
{
|
||
log_error ("out of core\n");
|
||
kill (pid, SIGTERM);
|
||
exit (1);
|
||
}
|
||
if (asprintf (&infostr_ssh_pid, "SSH_AGENT_PID=%u",
|
||
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 (opt.ssh_support)
|
||
*socket_name_ssh = 0;
|
||
|
||
if (env_file_name)
|
||
{
|
||
FILE *fp;
|
||
|
||
fp = fopen (env_file_name, "w");
|
||
if (!fp)
|
||
log_error (_("error creating `%s': %s\n"),
|
||
env_file_name, strerror (errno));
|
||
else
|
||
{
|
||
fputs (infostr, fp);
|
||
putc ('\n', fp);
|
||
if (opt.ssh_support)
|
||
{
|
||
fputs (infostr_ssh_sock, fp);
|
||
putc ('\n', fp);
|
||
fputs (infostr_ssh_pid, fp);
|
||
putc ('\n', fp);
|
||
}
|
||
fclose (fp);
|
||
}
|
||
}
|
||
|
||
|
||
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);
|
||
}
|
||
if (opt.ssh_support && putenv (infostr_ssh_sock))
|
||
{
|
||
log_error ("failed to set environment: %s\n",
|
||
strerror (errno) );
|
||
kill (pid, SIGTERM );
|
||
exit (1);
|
||
}
|
||
if (opt.ssh_support && putenv (infostr_ssh_pid))
|
||
{
|
||
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);
|
||
if (opt.ssh_support)
|
||
{
|
||
*strchr (infostr_ssh_sock, '=') = ' ';
|
||
printf ("setenv %s\n", infostr_ssh_sock);
|
||
*strchr (infostr_ssh_pid, '=') = ' ';
|
||
printf ("setenv %s\n", infostr_ssh_pid);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
printf ( "%s; export GPG_AGENT_INFO;\n", infostr);
|
||
if (opt.ssh_support)
|
||
{
|
||
printf ("%s; export SSH_AUTH_SOCK;\n", infostr_ssh_sock);
|
||
printf ("%s; export SSH_AGENT_PID;\n", infostr_ssh_pid);
|
||
}
|
||
}
|
||
free (infostr); /* (Note that a vanilla free is here correct.) */
|
||
if (opt.ssh_support)
|
||
{
|
||
free (infostr_ssh_sock);
|
||
free (infostr_ssh_pid);
|
||
}
|
||
exit (0);
|
||
}
|
||
/*NOTREACHED*/
|
||
} /* 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) && i != fd )
|
||
{
|
||
if ( ! close (i)
|
||
&& open ("/dev/null", i? O_WRONLY : O_RDONLY) == -1)
|
||
{
|
||
log_error ("failed to open `%s': %s\n",
|
||
"/dev/null", strerror (errno));
|
||
cleanup ();
|
||
exit (1);
|
||
}
|
||
}
|
||
}
|
||
if (setsid() == -1)
|
||
{
|
||
log_error ("setsid() failed: %s\n", strerror(errno) );
|
||
cleanup ();
|
||
exit (1);
|
||
}
|
||
|
||
log_get_prefix (&oldflags);
|
||
log_set_prefix (NULL, oldflags | JNLIB_LOG_RUN_DETACHED);
|
||
opt.running_detached = 1;
|
||
}
|
||
|
||
if (chdir("/"))
|
||
{
|
||
log_error ("chdir to / failed: %s\n", strerror (errno));
|
||
exit (1);
|
||
}
|
||
|
||
{
|
||
struct sigaction sa;
|
||
|
||
sa.sa_handler = SIG_IGN;
|
||
sigemptyset (&sa.sa_mask);
|
||
sa.sa_flags = 0;
|
||
sigaction (SIGPIPE, &sa, NULL);
|
||
}
|
||
#endif /*!HAVE_W32_SYSTEM*/
|
||
|
||
handle_connections (fd, opt.ssh_support ? fd_ssh : -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, 1); /* 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, 1);
|
||
}
|
||
fclose (fp);
|
||
set_debug ();
|
||
}
|
||
|
||
|
||
|
||
|
||
/* 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. Returns: 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));
|
||
agent_exit (2);
|
||
}
|
||
*p = '/';
|
||
}
|
||
|
||
if (strchr (name, PATHSEP_C))
|
||
{
|
||
log_error (("`%s' are not allowed in the socket name\n"), PATHSEP_S);
|
||
agent_exit (2);
|
||
}
|
||
if (strlen (name) + 1 >= DIMof (struct sockaddr_un, sun_path) )
|
||
{
|
||
log_error (_("name of socket too long\n"));
|
||
agent_exit (2);
|
||
}
|
||
return name;
|
||
}
|
||
|
||
|
||
|
||
/* Create a Unix domain socket with NAME. IS_STANDARD_NAME indicates
|
||
whether a non-random socket is used. Returns the filedescriptor or
|
||
terminates the process in case of an error. */
|
||
static int
|
||
create_server_socket (int is_standard_name, const char *name)
|
||
{
|
||
struct sockaddr_un *serv_addr;
|
||
socklen_t len;
|
||
int fd;
|
||
int rc;
|
||
|
||
#ifdef HAVE_W32_SYSTEM
|
||
fd = _w32_sock_new (AF_UNIX, SOCK_STREAM, 0);
|
||
#else
|
||
fd = socket (AF_UNIX, SOCK_STREAM, 0);
|
||
#endif
|
||
if (fd == -1)
|
||
{
|
||
log_error (_("can't create socket: %s\n"), strerror (errno));
|
||
agent_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 = (offsetof (struct sockaddr_un, sun_path)
|
||
+ strlen (serv_addr->sun_path) + 1);
|
||
|
||
#ifdef HAVE_W32_SYSTEM
|
||
rc = _w32_sock_bind (fd, (struct sockaddr*) serv_addr, len);
|
||
if (is_standard_name && rc == -1 )
|
||
{
|
||
remove (name);
|
||
rc = bind (fd, (struct sockaddr*) serv_addr, len);
|
||
}
|
||
#else
|
||
rc = bind (fd, (struct sockaddr*) serv_addr, len);
|
||
if (is_standard_name && rc == -1 && errno == EADDRINUSE)
|
||
{
|
||
remove (name);
|
||
rc = bind (fd, (struct sockaddr*) serv_addr, len);
|
||
}
|
||
#endif
|
||
if (rc == -1)
|
||
{
|
||
log_error (_("error binding socket to `%s': %s\n"),
|
||
serv_addr->sun_path, strerror (errno));
|
||
close (fd);
|
||
agent_exit (2);
|
||
}
|
||
|
||
if (listen (fd, 5 ) == -1)
|
||
{
|
||
log_error (_("listen() failed: %s\n"), strerror (errno));
|
||
close (fd);
|
||
agent_exit (2);
|
||
}
|
||
|
||
if (opt.verbose)
|
||
log_info (_("listening on socket `%s'\n"), serv_addr->sun_path);
|
||
|
||
return fd;
|
||
}
|
||
|
||
|
||
/* Check that the directory for storing the private keys exists and
|
||
create it if not. This function won't fail as it is only a
|
||
convenience function and not strictly necessary. */
|
||
static void
|
||
create_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)
|
||
{
|
||
#ifdef HAVE_W32_SYSTEM /*FIXME: Setup proper permissions. */
|
||
if (!CreateDirectory (fname, NULL))
|
||
log_error (_("can't create directory `%s': %s\n"),
|
||
fname, w32_strerror (-1) );
|
||
#else
|
||
if (mkdir (fname, S_IRUSR|S_IWUSR|S_IXUSR ))
|
||
log_error (_("can't create directory `%s': %s\n"),
|
||
fname, strerror (errno) );
|
||
#endif
|
||
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) )
|
||
)
|
||
{
|
||
#ifdef HAVE_W32_SYSTEM
|
||
if (!CreateDirectory (home, NULL))
|
||
log_error (_("can't create directory `%s': %s\n"),
|
||
home, w32_strerror (-1) );
|
||
#else
|
||
if (mkdir (home, S_IRUSR|S_IWUSR|S_IXUSR ))
|
||
log_error (_("can't create directory `%s': %s\n"),
|
||
home, strerror (errno) );
|
||
#endif
|
||
else
|
||
{
|
||
if (!opt.quiet)
|
||
log_info (_("directory `%s' created\n"), home);
|
||
create_private_keys_directory (home);
|
||
}
|
||
}
|
||
}
|
||
else
|
||
log_error (_("stat() failed for `%s': %s\n"), home, strerror (errno));
|
||
}
|
||
else if ( !S_ISDIR(statbuf.st_mode))
|
||
{
|
||
log_error (_("can't use `%s' as home directory\n"), home);
|
||
}
|
||
else /* exists and is a directory. */
|
||
{
|
||
create_private_keys_directory (home);
|
||
}
|
||
xfree (home);
|
||
}
|
||
|
||
|
||
|
||
/* This is the worker for the ticker. It is called every few seconds
|
||
and may only do fast operations. */
|
||
static void
|
||
handle_tick (void)
|
||
{
|
||
/* Check whether the scdaemon has died and cleanup in this case. */
|
||
agent_scd_check_aliveness ();
|
||
|
||
/* If we are running as a child of another process, check whether
|
||
the parent is still alive and shutdown if not. */
|
||
#ifndef HAVE_W32_SYSTEM
|
||
if (parent_pid != (pid_t)(-1))
|
||
{
|
||
if (kill (parent_pid, 0))
|
||
{
|
||
shutdown_pending = 2;
|
||
log_info ("parent process died - shutting down\n");
|
||
log_info ("%s %s stopped\n", strusage(11), strusage(13) );
|
||
cleanup ();
|
||
agent_exit (0);
|
||
}
|
||
}
|
||
#endif /*HAVE_W32_SYSTEM*/
|
||
}
|
||
|
||
|
||
static void
|
||
handle_signal (int signo)
|
||
{
|
||
switch (signo)
|
||
{
|
||
#ifndef HAVE_W32_SYSTEM
|
||
case SIGHUP:
|
||
log_info ("SIGHUP received - "
|
||
"re-reading configuration and flushing cache\n");
|
||
agent_flush_cache ();
|
||
reread_configuration ();
|
||
agent_reload_trustlist ();
|
||
break;
|
||
|
||
case SIGUSR1:
|
||
log_info ("SIGUSR1 received - printing internal information:\n");
|
||
pth_ctrl (PTH_CTRL_DUMPSTATE, log_get_stream ());
|
||
agent_query_dump_state ();
|
||
agent_scd_dump_state ();
|
||
break;
|
||
|
||
case SIGUSR2:
|
||
if (opt.verbose)
|
||
log_info ("SIGUSR2 received - checking smartcard status\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 ();
|
||
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;
|
||
#endif
|
||
default:
|
||
log_info ("signal %d received - no action defined\n", signo);
|
||
}
|
||
}
|
||
|
||
|
||
/* This is the standard connection thread's main function. */
|
||
static void *
|
||
start_connection_thread (void *arg)
|
||
{
|
||
int fd = (int)arg;
|
||
|
||
if (opt.verbose)
|
||
log_info (_("handler 0x%lx for fd %d started\n"),
|
||
(long)pth_self (), fd);
|
||
|
||
start_command_handler (-1, fd);
|
||
if (opt.verbose)
|
||
log_info (_("handler 0x%lx for fd %d terminated\n"),
|
||
(long)pth_self (), fd);
|
||
|
||
return NULL;
|
||
}
|
||
|
||
|
||
/* This is the ssh connection thread's main function. */
|
||
static void *
|
||
start_connection_thread_ssh (void *arg)
|
||
{
|
||
int fd = (int)arg;
|
||
|
||
if (opt.verbose)
|
||
log_info (_("ssh handler 0x%lx for fd %d started\n"),
|
||
(long)pth_self (), fd);
|
||
|
||
start_command_handler_ssh (fd);
|
||
if (opt.verbose)
|
||
log_info (_("ssh handler 0x%lx for fd %d terminated\n"),
|
||
(long)pth_self (), fd);
|
||
|
||
return NULL;
|
||
}
|
||
|
||
|
||
/* Connection handler loop. Wait for coecntion requests and spawn a
|
||
thread after accepting a connection. */
|
||
static void
|
||
handle_connections (int listen_fd, int listen_fd_ssh)
|
||
{
|
||
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;
|
||
|
||
tattr = pth_attr_new();
|
||
pth_attr_set (tattr, PTH_ATTR_JOINABLE, 0);
|
||
pth_attr_set (tattr, PTH_ATTR_STACK_SIZE, 256*1024);
|
||
|
||
#ifndef HAVE_W32_SYSTEM /* fixme */
|
||
/* Make sure that the signals we are going to handle are not blocked
|
||
and create an event object for them. */
|
||
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
|
||
ev = NULL;
|
||
#endif
|
||
time_ev = NULL;
|
||
|
||
FD_ZERO (&fdset);
|
||
FD_SET (listen_fd, &fdset);
|
||
if (listen_fd_ssh != -1)
|
||
FD_SET (listen_fd_ssh, &fdset);
|
||
|
||
for (;;)
|
||
{
|
||
sigset_t oldsigs;
|
||
|
||
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;
|
||
}
|
||
|
||
/* Create a timeout event if needed. */
|
||
if (!time_ev)
|
||
time_ev = pth_event (PTH_EVENT_TIME, pth_timeout (2, 0));
|
||
|
||
/* 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 (FD_SETSIZE, &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 (FD_ISSET (listen_fd, &read_fdset))
|
||
{
|
||
plen = sizeof paddr;
|
||
fd = pth_accept (listen_fd, (struct sockaddr *)&paddr, &plen);
|
||
if (fd == -1)
|
||
{
|
||
log_error ("accept failed: %s\n", strerror (errno));
|
||
}
|
||
else
|
||
{
|
||
char threadname[50];
|
||
snprintf (threadname, sizeof threadname-1,
|
||
"conn fd=%d (gpg)", fd);
|
||
threadname[sizeof threadname -1] = 0;
|
||
pth_attr_set (tattr, PTH_ATTR_NAME, threadname);
|
||
if (!pth_spawn (tattr, start_connection_thread, (void*)fd))
|
||
{
|
||
log_error ("error spawning connection handler: %s\n",
|
||
strerror (errno) );
|
||
close (fd);
|
||
}
|
||
}
|
||
fd = -1;
|
||
}
|
||
|
||
if (listen_fd_ssh != -1 && FD_ISSET (listen_fd_ssh, &read_fdset))
|
||
{
|
||
plen = sizeof paddr;
|
||
fd = pth_accept (listen_fd_ssh, (struct sockaddr *)&paddr, &plen);
|
||
if (fd == -1)
|
||
{
|
||
log_error ("accept failed for ssh: %s\n", strerror (errno));
|
||
}
|
||
else
|
||
{
|
||
char threadname[50];
|
||
snprintf (threadname, sizeof threadname-1,
|
||
"conn fd=%d (ssh)", fd);
|
||
threadname[sizeof threadname -1] = 0;
|
||
pth_attr_set (tattr, PTH_ATTR_NAME, threadname);
|
||
|
||
if (!pth_spawn (tattr, start_connection_thread_ssh, (void*)fd))
|
||
{
|
||
log_error ("error spawning ssh connection handler: %s\n",
|
||
strerror (errno) );
|
||
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));
|
||
}
|
||
|
||
|
||
/* Figure out whether an agent is available and running. Prints an
|
||
error if not. Usually started with MODE 0. */
|
||
static int
|
||
check_for_running_agent (int mode)
|
||
{
|
||
int rc;
|
||
char *infostr, *p;
|
||
assuan_context_t ctx;
|
||
int prot, pid;
|
||
|
||
if (!mode)
|
||
{
|
||
infostr = getenv ("GPG_AGENT_INFO");
|
||
if (!infostr || !*infostr)
|
||
{
|
||
if (!check_for_running_agent (1))
|
||
return 0; /* Okay, its running on the standard socket. */
|
||
log_error (_("no gpg-agent running in this session\n"));
|
||
return -1;
|
||
}
|
||
|
||
infostr = xstrdup (infostr);
|
||
if ( !(p = strchr (infostr, PATHSEP_C)) || p == infostr)
|
||
{
|
||
xfree (infostr);
|
||
if (!check_for_running_agent (1))
|
||
return 0; /* Okay, its running on the standard socket. */
|
||
log_error (_("malformed GPG_AGENT_INFO environment variable\n"));
|
||
return -1;
|
||
}
|
||
|
||
*p++ = 0;
|
||
pid = atoi (p);
|
||
while (*p && *p != PATHSEP_C)
|
||
p++;
|
||
prot = *p? atoi (p+1) : 0;
|
||
if (prot != 1)
|
||
{
|
||
xfree (infostr);
|
||
log_error (_("gpg-agent protocol version %d is not supported\n"),
|
||
prot);
|
||
if (!check_for_running_agent (1))
|
||
return 0; /* Okay, its running on the standard socket. */
|
||
return -1;
|
||
}
|
||
}
|
||
else /* MODE != 0 */
|
||
{
|
||
infostr = make_filename (opt.homedir, "S.gpg-agent", NULL);
|
||
pid = (pid_t)(-1);
|
||
}
|
||
|
||
|
||
rc = assuan_socket_connect (&ctx, infostr, pid);
|
||
xfree (infostr);
|
||
if (rc)
|
||
{
|
||
if (!mode && !check_for_running_agent (1))
|
||
return 0; /* Okay, its running on the standard socket. */
|
||
|
||
if (!mode)
|
||
log_error ("can't connect to the agent: %s\n", gpg_strerror (rc));
|
||
return -1;
|
||
}
|
||
|
||
if (!opt.quiet)
|
||
log_info ("gpg-agent running and available\n");
|
||
|
||
assuan_disconnect (ctx);
|
||
return 0;
|
||
}
|