mirror of
git://git.gnupg.org/gnupg.git
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096e7457ec
The asymmetric quotes used by GNU in the past (`...') don't render nicely on modern systems. We now use two \x27 characters ('...'). The proper solution would be to use the correct Unicode symmetric quotes here. However this has the disadvantage that the system requires Unicode support. We don't want that today. If Unicode is available a generated po file can be used to output proper quotes. A simple sed script like the one used for en@quote is sufficient to change them. The changes have been done by applying sed -i "s/\`\([^'\`]*\)'/'\1'/g" to most files and fixing obvious problems by hand. The msgid strings in the po files were fixed with a similar command.
2278 lines
68 KiB
C
2278 lines
68 KiB
C
/* gpg-agent.c - The GnuPG Agent
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* Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009,
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* 2010 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <stdarg.h>
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#include <string.h>
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#include <errno.h>
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#include <assert.h>
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#include <time.h>
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#include <fcntl.h>
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#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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#ifdef HAVE_SIGNAL_H
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# include <signal.h>
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#endif
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#include <npth.h>
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#define JNLIB_NEED_LOG_LOGV
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#define JNLIB_NEED_AFLOCAL
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#include "agent.h"
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#include <assuan.h> /* Malloc hooks and socket wrappers. */
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#include "i18n.h"
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#include "mkdtemp.h" /* Gnulib replacement. */
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#include "sysutils.h"
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#include "gc-opt-flags.h"
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#include "exechelp.h"
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#include "asshelp.h"
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#include "../include/cipher.h" /* for PUBKEY_ALGO_ECDSA, PUBKEY_ALGO_ECDH */
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#include "../common/init.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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aUseStandardSocketP,
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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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oPinentryTouchFile,
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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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oXauthority,
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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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oEnforcePassphraseConstraints,
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oMinPassphraseLen,
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oMinPassphraseNonalpha,
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oCheckPassphrasePattern,
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oMaxPassphraseDays,
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oEnablePassphraseHistory,
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oUseStandardSocket,
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oNoUseStandardSocket,
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oFakedSystemTime,
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oIgnoreCacheForSigning,
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oAllowMarkTrusted,
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oAllowPresetPassphrase,
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oAllowLoopbackPinentry,
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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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{ aUseStandardSocketP, "use-standard-socket-p", 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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{ oPinentryTouchFile, "pinentry-touch-file", 2 , "@" },
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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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{ oFakedSystemTime, "faked-system-time", 2, "@" }, /* (epoch time) */
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{ oBatch, "batch", 0, "@" },
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{ oHomedir, "homedir", 2, "@"},
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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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{ oXauthority, "xauthority", 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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{ oEnforcePassphraseConstraints, "enforce-passphrase-constraints", 0, "@"},
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{ oMinPassphraseLen, "min-passphrase-len", 4, "@" },
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{ oMinPassphraseNonalpha, "min-passphrase-nonalpha", 4, "@" },
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{ oCheckPassphrasePattern, "check-passphrase-pattern", 2, "@" },
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{ oMaxPassphraseDays, "max-passphrase-days", 4, "@" },
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{ oEnablePassphraseHistory, "enable-passphrase-history", 0, "@" },
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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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{ oAllowLoopbackPinentry, "allow-loopback-pinentry", 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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#define MAX_CACHE_TTL_SSH (120*60) /* 2 hours */
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#define MIN_PASSPHRASE_LEN (8)
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#define MIN_PASSPHRASE_NONALPHA (1)
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#define MAX_PASSPHRASE_DAYS (0)
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/* The timer tick used for housekeeping stuff. For Windows we use a
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longer period as the SetWaitableTimer seems to signal earlier than
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the 2 seconds. CHECK_OWN_SOCKET_INTERVAL defines how often we
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check our own socket in standard socket mode. If that value is 0
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we don't check at all. All values are in seconds. */
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#if defined(HAVE_W32CE_SYSTEM)
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# define TIMERTICK_INTERVAL (60)
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# define CHECK_OWN_SOCKET_INTERVAL (0) /* Never */
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#elif defined(HAVE_W32_SYSTEM)
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# define TIMERTICK_INTERVAL (4)
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# define CHECK_OWN_SOCKET_INTERVAL (60)
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#else
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# define TIMERTICK_INTERVAL (2)
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# define CHECK_OWN_SOCKET_INTERVAL (60)
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#endif
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/* The list of open file descriptors at startup. Note that this list
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has been allocated using the standard malloc. */
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static int *startup_fd_list;
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/* The signal mask at startup and a flag telling whether it is valid. */
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#ifdef HAVE_SIGPROCMASK
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static sigset_t startup_signal_mask;
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static int startup_signal_mask_valid;
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#endif
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/* Flag to indicate that a shutdown was requested. */
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static int shutdown_pending;
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/* Counter for the currently running own socket checks. */
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static int check_own_socket_running;
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/* 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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/* We need to keep track of the server's nonces (these are dummies for
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POSIX systems). */
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static assuan_sock_nonce_t socket_nonce;
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static assuan_sock_nonce_t socket_nonce_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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static char *default_xauthority;
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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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/* Number of active connections. */
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static int active_connections;
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/*
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Local prototypes.
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*/
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static char *create_socket_name (char *standard_name, char *template);
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static gnupg_fd_t create_server_socket (char *name, int is_ssh,
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assuan_sock_nonce_t *nonce);
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static void create_directories (void);
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static void agent_init_default_ctrl (ctrl_t ctrl);
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static void agent_deinit_default_ctrl (ctrl_t ctrl);
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static void handle_connections (gnupg_fd_t listen_fd,
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gnupg_fd_t listen_fd_ssh);
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static void check_own_socket (void);
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static int check_for_running_agent (int silent, int mode);
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/* Pth wrapper function definitions. */
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ASSUAN_SYSTEM_NPTH_IMPL;
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/*
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Functions.
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*/
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/* Allocate a string describing a library version by calling a GETFNC.
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This function is expected to be called only once. GETFNC is
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expected to have a semantic like gcry_check_version (). */
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static char *
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make_libversion (const char *libname, const char *(*getfnc)(const char*))
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{
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const char *s;
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char *result;
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if (maybe_setuid)
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{
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gcry_control (GCRYCTL_INIT_SECMEM, 0, 0); /* Drop setuid. */
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maybe_setuid = 0;
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}
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s = getfnc (NULL);
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result = xmalloc (strlen (libname) + 1 + strlen (s) + 1);
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strcpy (stpcpy (stpcpy (result, libname), " "), s);
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return result;
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}
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/* Return strings describing this program. The case values are
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described in common/argparse.c:strusage. The values here override
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the default values given by strusage. */
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static const char *
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my_strusage (int level)
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{
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static char *ver_gcry;
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const char *p;
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|
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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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/* TRANSLATORS: @EMAIL@ will get replaced by the actual bug
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reporting address. This is so that we can change the
|
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reporting address without breaking the translations. */
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case 19: p = _("Please report bugs to <@EMAIL@>.\n"); break;
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case 20:
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if (!ver_gcry)
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ver_gcry = make_libversion ("libgcrypt", gcry_check_version);
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p = ver_gcry;
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break;
|
||
|
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case 1:
|
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case 40: p = _("Usage: 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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}
|
||
|
||
|
||
|
||
/* 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
|
||
DEBUG_LEVEL set, a specific set of debug flags is set; thus overriding
|
||
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
|
||
options due to a SIGHUP. */
|
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static void
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||
set_debug (void)
|
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{
|
||
int numok = (debug_level && digitp (debug_level));
|
||
int numlvl = numok? atoi (debug_level) : 0;
|
||
|
||
if (!debug_level)
|
||
;
|
||
else if (!strcmp (debug_level, "none") || (numok && numlvl < 1))
|
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opt.debug = 0;
|
||
else if (!strcmp (debug_level, "basic") || (numok && numlvl <= 2))
|
||
opt.debug = DBG_ASSUAN_VALUE;
|
||
else if (!strcmp (debug_level, "advanced") || (numok && numlvl <= 5))
|
||
opt.debug = DBG_ASSUAN_VALUE|DBG_COMMAND_VALUE;
|
||
else if (!strcmp (debug_level, "expert") || (numok && numlvl <= 8))
|
||
opt.debug = (DBG_ASSUAN_VALUE|DBG_COMMAND_VALUE
|
||
|DBG_CACHE_VALUE);
|
||
else if (!strcmp (debug_level, "guru") || numok)
|
||
{
|
||
opt.debug = ~0;
|
||
/* Unless the "guru" string has been used we don't want to allow
|
||
hashing debugging. The rationale is that people tend to
|
||
select the highest debug value and would then clutter their
|
||
disk with debug files which may reveal confidential data. */
|
||
if (numok)
|
||
opt.debug &= ~(DBG_HASHING_VALUE);
|
||
}
|
||
else
|
||
{
|
||
log_error (_("invalid debug-level '%s' given\n"), debug_level);
|
||
opt.debug = 0; /* Reset debugging, so that prior debug
|
||
statements won't have an undesired effect. */
|
||
}
|
||
|
||
if (opt.debug && !opt.verbose)
|
||
opt.verbose = 1;
|
||
if (opt.debug && opt.quiet)
|
||
opt.quiet = 0;
|
||
|
||
if (opt.debug & DBG_MPI_VALUE)
|
||
gcry_control (GCRYCTL_SET_DEBUG_FLAGS, 2);
|
||
if (opt.debug & DBG_CRYPTO_VALUE )
|
||
gcry_control (GCRYCTL_SET_DEBUG_FLAGS, 1);
|
||
gcry_control (GCRYCTL_SET_VERBOSITY, (int)opt.verbose);
|
||
|
||
if (opt.debug)
|
||
log_info ("enabled debug flags:%s%s%s%s%s%s%s%s\n",
|
||
(opt.debug & DBG_COMMAND_VALUE)? " command":"",
|
||
(opt.debug & DBG_MPI_VALUE )? " mpi":"",
|
||
(opt.debug & DBG_CRYPTO_VALUE )? " crypto":"",
|
||
(opt.debug & DBG_MEMORY_VALUE )? " memory":"",
|
||
(opt.debug & DBG_CACHE_VALUE )? " cache":"",
|
||
(opt.debug & DBG_MEMSTAT_VALUE)? " memstat":"",
|
||
(opt.debug & DBG_HASHING_VALUE)? " hashing":"",
|
||
(opt.debug & DBG_ASSUAN_VALUE )? " assuan":"");
|
||
}
|
||
|
||
|
||
/* Helper for cleanup to remove one socket with NAME. */
|
||
static void
|
||
remove_socket (char *name)
|
||
{
|
||
if (name && *name)
|
||
{
|
||
char *p;
|
||
|
||
gnupg_remove (name);
|
||
p = strrchr (name, '/');
|
||
if (p)
|
||
{
|
||
*p = 0;
|
||
rmdir (name);
|
||
*p = '/';
|
||
}
|
||
*name = 0;
|
||
}
|
||
}
|
||
|
||
|
||
/* Cleanup code for this program. This is either called has an atexit
|
||
handler or directly. */
|
||
static void
|
||
cleanup (void)
|
||
{
|
||
static int done;
|
||
|
||
if (done)
|
||
return;
|
||
done = 1;
|
||
deinitialize_module_cache ();
|
||
remove_socket (socket_name);
|
||
remove_socket (socket_name_ssh);
|
||
}
|
||
|
||
|
||
|
||
/* Handle options which are allowed to be reset after program start.
|
||
Return true when the current option in PARGS could be handled and
|
||
false if not. As a special feature, passing a value of NULL for
|
||
PARGS, resets the options to the default. REREAD should be set
|
||
true if it is not the initial option parsing. */
|
||
static int
|
||
parse_rereadable_options (ARGPARSE_ARGS *pargs, int reread)
|
||
{
|
||
if (!pargs)
|
||
{ /* reset mode */
|
||
opt.quiet = 0;
|
||
opt.verbose = 0;
|
||
opt.debug = 0;
|
||
opt.no_grab = 0;
|
||
opt.pinentry_program = NULL;
|
||
opt.pinentry_touch_file = NULL;
|
||
opt.scdaemon_program = NULL;
|
||
opt.def_cache_ttl = DEFAULT_CACHE_TTL;
|
||
opt.def_cache_ttl_ssh = DEFAULT_CACHE_TTL_SSH;
|
||
opt.max_cache_ttl = MAX_CACHE_TTL;
|
||
opt.max_cache_ttl_ssh = MAX_CACHE_TTL_SSH;
|
||
opt.enforce_passphrase_constraints = 0;
|
||
opt.min_passphrase_len = MIN_PASSPHRASE_LEN;
|
||
opt.min_passphrase_nonalpha = MIN_PASSPHRASE_NONALPHA;
|
||
opt.check_passphrase_pattern = NULL;
|
||
opt.max_passphrase_days = MAX_PASSPHRASE_DAYS;
|
||
opt.enable_passhrase_history = 0;
|
||
opt.ignore_cache_for_signing = 0;
|
||
opt.allow_mark_trusted = 0;
|
||
opt.disable_scdaemon = 0;
|
||
return 1;
|
||
}
|
||
|
||
switch (pargs->r_opt)
|
||
{
|
||
case oQuiet: opt.quiet = 1; break;
|
||
case oVerbose: opt.verbose++; break;
|
||
|
||
case oDebug: opt.debug |= pargs->r.ret_ulong; break;
|
||
case oDebugAll: opt.debug = ~0; break;
|
||
case oDebugLevel: debug_level = pargs->r.ret_str; break;
|
||
|
||
case 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 oPinentryTouchFile: opt.pinentry_touch_file = 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 oEnforcePassphraseConstraints:
|
||
opt.enforce_passphrase_constraints=1;
|
||
break;
|
||
case oMinPassphraseLen: opt.min_passphrase_len = pargs->r.ret_ulong; break;
|
||
case oMinPassphraseNonalpha:
|
||
opt.min_passphrase_nonalpha = pargs->r.ret_ulong;
|
||
break;
|
||
case oCheckPassphrasePattern:
|
||
opt.check_passphrase_pattern = pargs->r.ret_str;
|
||
break;
|
||
case oMaxPassphraseDays:
|
||
opt.max_passphrase_days = pargs->r.ret_ulong;
|
||
break;
|
||
case oEnablePassphraseHistory:
|
||
opt.enable_passhrase_history = 1;
|
||
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;
|
||
|
||
case oAllowLoopbackPinentry: opt.allow_loopback_pinentry = 1; break;
|
||
|
||
default:
|
||
return 0; /* not handled */
|
||
}
|
||
|
||
return 1; /* handled */
|
||
}
|
||
|
||
|
||
/* The main entry point. */
|
||
int
|
||
main (int argc, char **argv )
|
||
{
|
||
ARGPARSE_ARGS pargs;
|
||
int orig_argc;
|
||
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;
|
||
gpg_error_t err;
|
||
const char *env_file_name = NULL;
|
||
struct assuan_malloc_hooks malloc_hooks;
|
||
|
||
/* Before we do anything else we save the list of currently open
|
||
file descriptors and the signal mask. This info is required to
|
||
do the exec call properly. */
|
||
startup_fd_list = get_all_open_fds ();
|
||
#ifdef HAVE_SIGPROCMASK
|
||
if (!sigprocmask (SIG_UNBLOCK, NULL, &startup_signal_mask))
|
||
startup_signal_mask_valid = 1;
|
||
#endif /*HAVE_SIGPROCMASK*/
|
||
|
||
/* Set program name etc. */
|
||
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);
|
||
|
||
/* Make sure that our subsystems are ready. */
|
||
i18n_init ();
|
||
init_common_subsystems (&argc, &argv);
|
||
|
||
npth_init ();
|
||
|
||
/* 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( _("%s is too old (need %s, have %s)\n"), "libgcrypt",
|
||
NEED_LIBGCRYPT_VERSION, gcry_check_version (NULL) );
|
||
}
|
||
|
||
malloc_hooks.malloc = gcry_malloc;
|
||
malloc_hooks.realloc = gcry_realloc;
|
||
malloc_hooks.free = gcry_free;
|
||
assuan_set_malloc_hooks (&malloc_hooks);
|
||
assuan_set_gpg_err_source (GPG_ERR_SOURCE_DEFAULT);
|
||
assuan_set_system_hooks (ASSUAN_SYSTEM_NPTH);
|
||
assuan_sock_init ();
|
||
setup_libassuan_logging (&opt.debug);
|
||
|
||
setup_libgcrypt_logging ();
|
||
gcry_control (GCRYCTL_USE_SECURE_RNDPOOL);
|
||
|
||
disable_core_dumps ();
|
||
|
||
/* Set default options. */
|
||
parse_rereadable_options (NULL, 0); /* Reset them to default values. */
|
||
#ifdef USE_STANDARD_SOCKET
|
||
opt.use_standard_socket = 1;
|
||
#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. */
|
||
{
|
||
const char *s;
|
||
int idx;
|
||
static const char *names[] =
|
||
{ "DISPLAY", "TERM", "XAUTHORITY", "PINENTRY_USER_DATA", NULL };
|
||
|
||
err = 0;
|
||
opt.startup_env = session_env_new ();
|
||
if (!opt.startup_env)
|
||
err = gpg_error_from_syserror ();
|
||
for (idx=0; !err && names[idx]; idx++)
|
||
{
|
||
s = getenv (names[idx]);
|
||
if (s)
|
||
err = session_env_setenv (opt.startup_env, names[idx], s);
|
||
}
|
||
if (!err)
|
||
{
|
||
s = ttyname (0);
|
||
if (s)
|
||
err = session_env_setenv (opt.startup_env, "GPG_TTY", s);
|
||
}
|
||
if (err)
|
||
log_fatal ("error recording startup environment: %s\n",
|
||
gpg_strerror (err));
|
||
|
||
/* 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 );
|
||
/* Save the default conf file name so that
|
||
reread_configuration is able to test whether the
|
||
config file has been created in the meantime. */
|
||
xfree (config_filename);
|
||
config_filename = configname;
|
||
configname = NULL;
|
||
}
|
||
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 aUseStandardSocketP: gpgconf_list = 3; 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 oXauthority: default_xauthority = xstrdup (pargs.r.ret_str);
|
||
break;
|
||
|
||
case oUseStandardSocket: opt.use_standard_socket = 1; break;
|
||
case oNoUseStandardSocket: opt.use_standard_socket = 0; break;
|
||
|
||
case oFakedSystemTime:
|
||
{
|
||
time_t faked_time = isotime2epoch (pargs.r.ret_str);
|
||
if (faked_time == (time_t)(-1))
|
||
faked_time = (time_t)strtoul (pargs.r.ret_str, NULL, 10);
|
||
gnupg_set_time (faked_time, 0);
|
||
}
|
||
break;
|
||
|
||
case 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. */
|
||
if (config_filename != configname)
|
||
{
|
||
xfree (config_filename);
|
||
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)
|
||
{
|
||
es_fprintf (es_stderr, "%s %s; %s\n",
|
||
strusage(11), strusage(13), strusage(14) );
|
||
es_fprintf (es_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
|
||
|
||
/* Print a warning if an argument looks like an option. */
|
||
if (!opt.quiet && !(pargs.flags & ARGPARSE_FLAG_STOP_SEEN))
|
||
{
|
||
int i;
|
||
|
||
for (i=0; i < argc; i++)
|
||
if (argv[i][0] == '-' && argv[i][1] == '-')
|
||
log_info (_("NOTE: '%s' is not considered an option\n"), argv[i]);
|
||
}
|
||
|
||
#ifdef ENABLE_NLS
|
||
/* 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
|
||
|
||
if (!pipe_server && !is_daemon && !gpgconf_list)
|
||
{
|
||
/* We have been called without any options and thus we merely
|
||
check whether an agent is already running. We do this right
|
||
here so that we don't clobber a logfile with this check but
|
||
print the status directly to stderr. */
|
||
opt.debug = 0;
|
||
set_debug ();
|
||
check_for_running_agent (0, 0);
|
||
agent_exit (0);
|
||
}
|
||
|
||
set_debug ();
|
||
|
||
if (atexit (cleanup))
|
||
{
|
||
log_error ("atexit failed\n");
|
||
cleanup ();
|
||
exit (1);
|
||
}
|
||
|
||
initialize_module_cache ();
|
||
initialize_module_call_pinentry ();
|
||
initialize_module_call_scd ();
|
||
initialize_module_trustlist ();
|
||
|
||
/* 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());
|
||
gnupg_sleep (debug_wait);
|
||
log_debug ("... okay\n");
|
||
}
|
||
|
||
if (gpgconf_list == 3)
|
||
{
|
||
if (opt.use_standard_socket && !opt.quiet)
|
||
log_info ("configured to use the standard socket\n");
|
||
agent_exit (!opt.use_standard_socket);
|
||
}
|
||
else if (gpgconf_list == 2)
|
||
agent_exit (0);
|
||
else if (gpgconf_list)
|
||
{
|
||
char *filename;
|
||
char *filename_esc;
|
||
|
||
/* List options and default values in the GPG Conf format. */
|
||
filename = make_filename (opt.homedir, "gpg-agent.conf", NULL );
|
||
filename_esc = percent_escape (filename, NULL);
|
||
|
||
es_printf ("gpgconf-gpg-agent.conf:%lu:\"%s\n",
|
||
GC_OPT_FLAG_DEFAULT, filename_esc);
|
||
xfree (filename);
|
||
xfree (filename_esc);
|
||
|
||
es_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 );
|
||
es_printf ("default-cache-ttl:%lu:%d:\n",
|
||
GC_OPT_FLAG_DEFAULT|GC_OPT_FLAG_RUNTIME, DEFAULT_CACHE_TTL );
|
||
es_printf ("default-cache-ttl-ssh:%lu:%d:\n",
|
||
GC_OPT_FLAG_DEFAULT|GC_OPT_FLAG_RUNTIME, DEFAULT_CACHE_TTL_SSH );
|
||
es_printf ("max-cache-ttl:%lu:%d:\n",
|
||
GC_OPT_FLAG_DEFAULT|GC_OPT_FLAG_RUNTIME, MAX_CACHE_TTL );
|
||
es_printf ("max-cache-ttl-ssh:%lu:%d:\n",
|
||
GC_OPT_FLAG_DEFAULT|GC_OPT_FLAG_RUNTIME, MAX_CACHE_TTL_SSH );
|
||
es_printf ("enforce-passphrase-constraints:%lu:\n",
|
||
GC_OPT_FLAG_NONE|GC_OPT_FLAG_RUNTIME);
|
||
es_printf ("min-passphrase-len:%lu:%d:\n",
|
||
GC_OPT_FLAG_DEFAULT|GC_OPT_FLAG_RUNTIME, MIN_PASSPHRASE_LEN );
|
||
es_printf ("min-passphrase-nonalpha:%lu:%d:\n",
|
||
GC_OPT_FLAG_DEFAULT|GC_OPT_FLAG_RUNTIME,
|
||
MIN_PASSPHRASE_NONALPHA);
|
||
es_printf ("check-passphrase-pattern:%lu:\n",
|
||
GC_OPT_FLAG_DEFAULT|GC_OPT_FLAG_RUNTIME);
|
||
es_printf ("max-passphrase-days:%lu:%d:\n",
|
||
GC_OPT_FLAG_DEFAULT|GC_OPT_FLAG_RUNTIME,
|
||
MAX_PASSPHRASE_DAYS);
|
||
es_printf ("enable-passphrase-history:%lu:\n",
|
||
GC_OPT_FLAG_NONE|GC_OPT_FLAG_RUNTIME);
|
||
es_printf ("no-grab:%lu:\n",
|
||
GC_OPT_FLAG_NONE|GC_OPT_FLAG_RUNTIME);
|
||
es_printf ("ignore-cache-for-signing:%lu:\n",
|
||
GC_OPT_FLAG_NONE|GC_OPT_FLAG_RUNTIME);
|
||
es_printf ("allow-mark-trusted:%lu:\n",
|
||
GC_OPT_FLAG_NONE|GC_OPT_FLAG_RUNTIME);
|
||
es_printf ("disable-scdaemon:%lu:\n",
|
||
GC_OPT_FLAG_NONE|GC_OPT_FLAG_RUNTIME);
|
||
|
||
agent_exit (0);
|
||
}
|
||
|
||
/* 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 */
|
||
ctrl_t ctrl;
|
||
|
||
ctrl = xtrycalloc (1, sizeof *ctrl);
|
||
if (!ctrl)
|
||
{
|
||
log_error ("error allocating connection control data: %s\n",
|
||
strerror (errno) );
|
||
agent_exit (1);
|
||
}
|
||
ctrl->session_env = session_env_new ();
|
||
if (!ctrl->session_env)
|
||
{
|
||
log_error ("error allocating session environment block: %s\n",
|
||
strerror (errno) );
|
||
xfree (ctrl);
|
||
agent_exit (1);
|
||
}
|
||
agent_init_default_ctrl (ctrl);
|
||
start_command_handler (ctrl, GNUPG_INVALID_FD, GNUPG_INVALID_FD);
|
||
agent_deinit_default_ctrl (ctrl);
|
||
xfree (ctrl);
|
||
}
|
||
else if (!is_daemon)
|
||
; /* NOTREACHED */
|
||
else
|
||
{ /* Regular server mode */
|
||
gnupg_fd_t fd;
|
||
gnupg_fd_t 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)
|
||
gnupg_unsetenv ("DISPLAY");
|
||
#endif
|
||
|
||
|
||
/* Create the sockets. */
|
||
socket_name = create_socket_name
|
||
("S.gpg-agent", "gpg-XXXXXX/S.gpg-agent");
|
||
if (opt.ssh_support)
|
||
socket_name_ssh = create_socket_name
|
||
("S.gpg-agent.ssh", "gpg-XXXXXX/S.gpg-agent.ssh");
|
||
|
||
fd = create_server_socket (socket_name, 0, &socket_nonce);
|
||
if (opt.ssh_support)
|
||
fd_ssh = create_server_socket (socket_name_ssh, 1, &socket_nonce_ssh);
|
||
else
|
||
fd_ssh = GNUPG_INVALID_FD;
|
||
|
||
/* 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 ();
|
||
es_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;
|
||
|
||
/* Close the socket FD. */
|
||
close (fd);
|
||
|
||
/* The signal mask might not be correct right now and thus
|
||
we restore it. That is not strictly necessary but some
|
||
programs falsely assume a cleared signal mask. */
|
||
|
||
#ifdef HAVE_SIGPROCMASK
|
||
if (startup_signal_mask_valid)
|
||
{
|
||
if (sigprocmask (SIG_SETMASK, &startup_signal_mask, NULL))
|
||
log_error ("error restoring signal mask: %s\n",
|
||
strerror (errno));
|
||
}
|
||
else
|
||
log_info ("no saved signal mask\n");
|
||
#endif /*HAVE_SIGPROCMASK*/
|
||
|
||
/* 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);
|
||
}
|
||
}
|
||
|
||
*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)
|
||
{
|
||
estream_t fp;
|
||
|
||
fp = es_fopen (env_file_name, "w,mode=-rw");
|
||
if (!fp)
|
||
log_error (_("error creating '%s': %s\n"),
|
||
env_file_name, strerror (errno));
|
||
else
|
||
{
|
||
es_fputs (infostr, fp);
|
||
es_putc ('\n', fp);
|
||
if (opt.ssh_support)
|
||
{
|
||
es_fputs (infostr_ssh_sock, fp);
|
||
es_putc ('\n', fp);
|
||
}
|
||
es_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);
|
||
}
|
||
|
||
/* Close all the file descriptors except the standard
|
||
ones and those open at startup. We explicitly don't
|
||
close 0,1,2 in case something went wrong collecting
|
||
them at startup. */
|
||
close_all_fds (3, startup_fd_list);
|
||
|
||
/* Run the command. */
|
||
execvp (argv[0], argv);
|
||
log_error ("failed to run the command: %s\n", strerror (errno));
|
||
kill (pid, SIGTERM);
|
||
exit (1);
|
||
}
|
||
else
|
||
{
|
||
/* Print the environment string, so that the caller can use
|
||
shell's eval to set it */
|
||
if (csh_style)
|
||
{
|
||
*strchr (infostr, '=') = ' ';
|
||
es_printf ("setenv %s;\n", infostr);
|
||
if (opt.ssh_support)
|
||
{
|
||
*strchr (infostr_ssh_sock, '=') = ' ';
|
||
es_printf ("setenv %s;\n", infostr_ssh_sock);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
es_printf ( "%s; export GPG_AGENT_INFO;\n", infostr);
|
||
if (opt.ssh_support)
|
||
{
|
||
es_printf ("%s; export SSH_AUTH_SOCK;\n",
|
||
infostr_ssh_sock);
|
||
}
|
||
}
|
||
xfree (infostr);
|
||
if (opt.ssh_support)
|
||
{
|
||
xfree (infostr_ssh_sock);
|
||
}
|
||
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*/
|
||
|
||
log_info ("%s %s started\n", strusage(11), strusage(13) );
|
||
handle_connections (fd, opt.ssh_support ? fd_ssh : GNUPG_INVALID_FD);
|
||
assuan_sock_close (fd);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Exit entry point. This function should be called instead of a
|
||
plain exit. */
|
||
void
|
||
agent_exit (int rc)
|
||
{
|
||
/*FIXME: update_random_seed_file();*/
|
||
|
||
/* We run our cleanup handler because that may close cipher contexts
|
||
stored in secure memory and thus this needs to be done before we
|
||
explicitly terminate secure memory. */
|
||
cleanup ();
|
||
|
||
#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);
|
||
}
|
||
|
||
|
||
/* Each thread has its own local variables conveyed by a control
|
||
structure usually identified by an argument named CTRL. This
|
||
function is called immediately after allocating the control
|
||
structure. Its purpose is to setup the default values for that
|
||
structure. */
|
||
static void
|
||
agent_init_default_ctrl (ctrl_t ctrl)
|
||
{
|
||
/* Note we ignore malloc errors because we can't do much about it
|
||
and the request will fail anyway shortly after this
|
||
initialization. */
|
||
session_env_setenv (ctrl->session_env, "DISPLAY", default_display);
|
||
session_env_setenv (ctrl->session_env, "GPG_TTY", default_ttyname);
|
||
session_env_setenv (ctrl->session_env, "TERM", default_ttytype);
|
||
session_env_setenv (ctrl->session_env, "XAUTHORITY", default_xauthority);
|
||
session_env_setenv (ctrl->session_env, "PINENTRY_USER_DATA", NULL);
|
||
|
||
if (ctrl->lc_ctype)
|
||
xfree (ctrl->lc_ctype);
|
||
ctrl->lc_ctype = default_lc_ctype? xtrystrdup (default_lc_ctype) : NULL;
|
||
|
||
if (ctrl->lc_messages)
|
||
xfree (ctrl->lc_messages);
|
||
ctrl->lc_messages = default_lc_messages? xtrystrdup (default_lc_messages)
|
||
/**/ : NULL;
|
||
|
||
ctrl->cache_ttl_opt_preset = CACHE_TTL_OPT_PRESET;
|
||
}
|
||
|
||
|
||
/* Release all resources allocated by default in the control
|
||
structure. This is the counterpart to agent_init_default_ctrl. */
|
||
static void
|
||
agent_deinit_default_ctrl (ctrl_t ctrl)
|
||
{
|
||
session_env_release (ctrl->session_env);
|
||
|
||
if (ctrl->lc_ctype)
|
||
xfree (ctrl->lc_ctype);
|
||
if (ctrl->lc_messages)
|
||
xfree (ctrl->lc_messages);
|
||
}
|
||
|
||
|
||
/* Reread parts of the configuration. Note, that this function is
|
||
obviously not thread-safe and should only be called from the PTH
|
||
signal handler.
|
||
|
||
Fixme: Due to the way the argument parsing works, we create a
|
||
memory leak here for all string type arguments. There is currently
|
||
no clean way to tell whether the memory for the argument has been
|
||
allocated or points into the process' 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_info (_("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 ();
|
||
}
|
||
|
||
|
||
/* Return the file name of the socket we are using for native
|
||
requests. */
|
||
const char *
|
||
get_agent_socket_name (void)
|
||
{
|
||
const char *s = socket_name;
|
||
|
||
return (s && *s)? s : NULL;
|
||
}
|
||
|
||
/* Return the file name of the socket we are using for SSH
|
||
requests. */
|
||
const char *
|
||
get_agent_ssh_socket_name (void)
|
||
{
|
||
const char *s = socket_name_ssh;
|
||
|
||
return (s && *s)? s : NULL;
|
||
}
|
||
|
||
|
||
/* Under W32, this function returns the handle of the scdaemon
|
||
notification event. Calling it the first time creates that
|
||
event. */
|
||
#if defined(HAVE_W32_SYSTEM) && !defined(HAVE_W32CE_SYSTEM)
|
||
void *
|
||
get_agent_scd_notify_event (void)
|
||
{
|
||
static HANDLE the_event = INVALID_HANDLE_VALUE;
|
||
|
||
if (the_event == INVALID_HANDLE_VALUE)
|
||
{
|
||
HANDLE h, h2;
|
||
SECURITY_ATTRIBUTES sa = { sizeof (SECURITY_ATTRIBUTES), NULL, TRUE};
|
||
|
||
/* We need to use a manual reset event object due to the way our
|
||
w32-pth wait function works: If we would use an automatic
|
||
reset event we are not able to figure out which handle has
|
||
been signaled because at the time we single out the signaled
|
||
handles using WFSO the event has already been reset due to
|
||
the WFMO. */
|
||
h = CreateEvent (&sa, TRUE, FALSE, NULL);
|
||
if (!h)
|
||
log_error ("can't create scd notify event: %s\n", w32_strerror (-1) );
|
||
else if (!DuplicateHandle (GetCurrentProcess(), h,
|
||
GetCurrentProcess(), &h2,
|
||
EVENT_MODIFY_STATE|SYNCHRONIZE, TRUE, 0))
|
||
{
|
||
log_error ("setting syncronize for scd notify event failed: %s\n",
|
||
w32_strerror (-1) );
|
||
CloseHandle (h);
|
||
}
|
||
else
|
||
{
|
||
CloseHandle (h);
|
||
the_event = h2;
|
||
}
|
||
}
|
||
|
||
return the_event;
|
||
}
|
||
#endif /*HAVE_W32_SYSTEM && !HAVE_W32CE_SYSTEM*/
|
||
|
||
|
||
|
||
/* Create a name for the socket. With USE_STANDARD_SOCKET given as
|
||
true using STANDARD_NAME in the home directory or if given as
|
||
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
|
||
allocated string with the absolute name of the socket used. */
|
||
static char *
|
||
create_socket_name (char *standard_name, char *template)
|
||
{
|
||
char *name, *p;
|
||
|
||
if (opt.use_standard_socket)
|
||
name = make_filename (opt.homedir, standard_name, NULL);
|
||
else
|
||
{
|
||
/* Prepend the tmp directory to the template. */
|
||
p = getenv ("TMPDIR");
|
||
if (!p || !*p)
|
||
p = "/tmp";
|
||
if (p[strlen (p) - 1] == '/')
|
||
name = xstrconcat (p, template, NULL);
|
||
else
|
||
name = xstrconcat (p, "/", template, NULL);
|
||
|
||
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. Returns the file descriptor
|
||
or terminates the process in case of an error. Not that this
|
||
function needs to be used for the regular socket first and only
|
||
then for the ssh socket. */
|
||
static gnupg_fd_t
|
||
create_server_socket (char *name, int is_ssh, assuan_sock_nonce_t *nonce)
|
||
{
|
||
struct sockaddr_un *serv_addr;
|
||
socklen_t len;
|
||
gnupg_fd_t fd;
|
||
int rc;
|
||
|
||
fd = assuan_sock_new (AF_UNIX, SOCK_STREAM, 0);
|
||
if (fd == ASSUAN_INVALID_FD)
|
||
{
|
||
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;
|
||
if (strlen (name) + 1 >= sizeof (serv_addr->sun_path))
|
||
{
|
||
log_error (_("socket name '%s' is too long\n"), name);
|
||
agent_exit (2);
|
||
}
|
||
strcpy (serv_addr->sun_path, name);
|
||
len = SUN_LEN (serv_addr);
|
||
rc = assuan_sock_bind (fd, (struct sockaddr*) serv_addr, len);
|
||
|
||
/* Our error code mapping on W32CE returns EEXIST thus we also test
|
||
for this. */
|
||
if (opt.use_standard_socket && rc == -1
|
||
&& (errno == EADDRINUSE
|
||
#ifdef HAVE_W32_SYSTEM
|
||
|| errno == EEXIST
|
||
#endif
|
||
))
|
||
{
|
||
/* Check whether a gpg-agent is already running on the standard
|
||
socket. We do this test only if this is not the ssh socket.
|
||
For ssh we assume that a test for gpg-agent has already been
|
||
done and reuse the requested ssh socket. Testing the
|
||
ssh-socket is not possible because at this point, though we
|
||
know the new Assuan socket, the Assuan server and thus the
|
||
ssh-agent server is not yet operational. This would lead to
|
||
a hang. */
|
||
if (!is_ssh && !check_for_running_agent (1, 1))
|
||
{
|
||
log_set_prefix (NULL, JNLIB_LOG_WITH_PREFIX);
|
||
log_set_file (NULL);
|
||
log_error (_("a gpg-agent is already running - "
|
||
"not starting a new one\n"));
|
||
*name = 0; /* Inhibit removal of the socket by cleanup(). */
|
||
assuan_sock_close (fd);
|
||
agent_exit (2);
|
||
}
|
||
gnupg_remove (name);
|
||
rc = assuan_sock_bind (fd, (struct sockaddr*) serv_addr, len);
|
||
}
|
||
if (rc != -1
|
||
&& (rc=assuan_sock_get_nonce ((struct sockaddr*)serv_addr, len, nonce)))
|
||
log_error (_("error getting nonce for the socket\n"));
|
||
if (rc == -1)
|
||
{
|
||
/* We use gpg_strerror here because it allows us to get strings
|
||
for some W32 socket error codes. */
|
||
log_error (_("error binding socket to '%s': %s\n"),
|
||
serv_addr->sun_path,
|
||
gpg_strerror (gpg_error_from_errno (errno)));
|
||
|
||
assuan_sock_close (fd);
|
||
if (opt.use_standard_socket)
|
||
*name = 0; /* Inhibit removal of the socket by cleanup(). */
|
||
agent_exit (2);
|
||
}
|
||
|
||
if (listen (FD2INT(fd), 5 ) == -1)
|
||
{
|
||
log_error (_("listen() failed: %s\n"), strerror (errno));
|
||
assuan_sock_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)
|
||
{
|
||
if (gnupg_mkdir (fname, "-rwx"))
|
||
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 = standard_homedir ();
|
||
char *home;
|
||
|
||
home = make_filename (opt.homedir, NULL);
|
||
if ( stat (home, &statbuf) )
|
||
{
|
||
if (errno == ENOENT)
|
||
{
|
||
if (
|
||
#ifdef HAVE_W32_SYSTEM
|
||
( !compare_filenames (home, defhome) )
|
||
#else
|
||
(*defhome == '~'
|
||
&& (strlen (home) >= strlen (defhome+1)
|
||
&& !strcmp (home + strlen(home)
|
||
- strlen (defhome+1), defhome+1)))
|
||
|| (*defhome != '~' && !strcmp (home, defhome) )
|
||
#endif
|
||
)
|
||
{
|
||
if (gnupg_mkdir (home, "-rwx"))
|
||
log_error (_("can't create directory '%s': %s\n"),
|
||
home, strerror (errno) );
|
||
else
|
||
{
|
||
if (!opt.quiet)
|
||
log_info (_("directory '%s' created\n"), home);
|
||
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)
|
||
{
|
||
static time_t last_minute;
|
||
|
||
if (!last_minute)
|
||
last_minute = time (NULL);
|
||
|
||
/* 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*/
|
||
|
||
/* Code to be run from time to time. */
|
||
#if CHECK_OWN_SOCKET_INTERVAL > 0
|
||
if (last_minute + CHECK_OWN_SOCKET_INTERVAL <= time (NULL))
|
||
{
|
||
check_own_socket ();
|
||
last_minute = time (NULL);
|
||
}
|
||
#endif
|
||
|
||
}
|
||
|
||
|
||
/* A global function which allows us to call the reload stuff from
|
||
other places too. This is only used when build for W32. */
|
||
void
|
||
agent_sighup_action (void)
|
||
{
|
||
log_info ("SIGHUP received - "
|
||
"re-reading configuration and flushing cache\n");
|
||
agent_flush_cache ();
|
||
reread_configuration ();
|
||
agent_reload_trustlist ();
|
||
}
|
||
|
||
|
||
/* A helper function to handle SIGUSR2. */
|
||
static void
|
||
agent_sigusr2_action (void)
|
||
{
|
||
if (opt.verbose)
|
||
log_info ("SIGUSR2 received - updating card event counter\n");
|
||
/* Nothing to check right now. We only increment a counter. */
|
||
bump_card_eventcounter ();
|
||
}
|
||
|
||
|
||
#ifndef HAVE_W32_SYSTEM
|
||
/* The signal handler for this program. It is expected to be run in
|
||
its own trhead and not in the context of a signal handler. */
|
||
static void
|
||
handle_signal (int signo)
|
||
{
|
||
switch (signo)
|
||
{
|
||
#ifndef HAVE_W32_SYSTEM
|
||
case SIGHUP:
|
||
agent_sighup_action ();
|
||
break;
|
||
|
||
case SIGUSR1:
|
||
log_info ("SIGUSR1 received - printing internal information:\n");
|
||
/* Fixme: We need to see how to integrate pth dumping into our
|
||
logging system. */
|
||
/* pth_ctrl (PTH_CTRL_DUMPSTATE, log_get_stream ()); */
|
||
agent_query_dump_state ();
|
||
agent_scd_dump_state ();
|
||
break;
|
||
|
||
case SIGUSR2:
|
||
agent_sigusr2_action ();
|
||
break;
|
||
|
||
case SIGTERM:
|
||
if (!shutdown_pending)
|
||
log_info ("SIGTERM received - shutting down ...\n");
|
||
else
|
||
log_info ("SIGTERM received - still %i open connections\n",
|
||
active_connections);
|
||
shutdown_pending++;
|
||
if (shutdown_pending > 2)
|
||
{
|
||
log_info ("shutdown forced\n");
|
||
log_info ("%s %s stopped\n", 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);
|
||
}
|
||
}
|
||
#endif
|
||
|
||
/* Check the nonce on a new connection. This is a NOP unless we we
|
||
are using our Unix domain socket emulation under Windows. */
|
||
static int
|
||
check_nonce (ctrl_t ctrl, assuan_sock_nonce_t *nonce)
|
||
{
|
||
if (assuan_sock_check_nonce (ctrl->thread_startup.fd, nonce))
|
||
{
|
||
log_info (_("error reading nonce on fd %d: %s\n"),
|
||
FD2INT(ctrl->thread_startup.fd), strerror (errno));
|
||
assuan_sock_close (ctrl->thread_startup.fd);
|
||
xfree (ctrl);
|
||
return -1;
|
||
}
|
||
else
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* This is the standard connection thread's main function. */
|
||
static void *
|
||
start_connection_thread (void *arg)
|
||
{
|
||
ctrl_t ctrl = arg;
|
||
|
||
if (check_nonce (ctrl, &socket_nonce))
|
||
{
|
||
log_error ("handler 0x%lx nonce check FAILED\n",
|
||
(unsigned long) npth_self());
|
||
return NULL;
|
||
}
|
||
|
||
agent_init_default_ctrl (ctrl);
|
||
if (opt.verbose)
|
||
log_info (_("handler 0x%lx for fd %d started\n"),
|
||
(unsigned long) npth_self(), FD2INT(ctrl->thread_startup.fd));
|
||
|
||
start_command_handler (ctrl, GNUPG_INVALID_FD, ctrl->thread_startup.fd);
|
||
if (opt.verbose)
|
||
log_info (_("handler 0x%lx for fd %d terminated\n"),
|
||
(unsigned long) npth_self(), FD2INT(ctrl->thread_startup.fd));
|
||
|
||
agent_deinit_default_ctrl (ctrl);
|
||
xfree (ctrl);
|
||
return NULL;
|
||
}
|
||
|
||
|
||
/* This is the ssh connection thread's main function. */
|
||
static void *
|
||
start_connection_thread_ssh (void *arg)
|
||
{
|
||
ctrl_t ctrl = arg;
|
||
|
||
if (check_nonce (ctrl, &socket_nonce_ssh))
|
||
return NULL;
|
||
|
||
agent_init_default_ctrl (ctrl);
|
||
if (opt.verbose)
|
||
log_info (_("ssh handler 0x%lx for fd %d started\n"),
|
||
(unsigned long) npth_self(), FD2INT(ctrl->thread_startup.fd));
|
||
|
||
start_command_handler_ssh (ctrl, ctrl->thread_startup.fd);
|
||
if (opt.verbose)
|
||
log_info (_("ssh handler 0x%lx for fd %d terminated\n"),
|
||
(unsigned long) npth_self(), FD2INT(ctrl->thread_startup.fd));
|
||
|
||
agent_deinit_default_ctrl (ctrl);
|
||
xfree (ctrl);
|
||
return NULL;
|
||
}
|
||
|
||
|
||
/* Connection handler loop. Wait for connection requests and spawn a
|
||
thread after accepting a connection. */
|
||
static void
|
||
handle_connections (gnupg_fd_t listen_fd, gnupg_fd_t listen_fd_ssh)
|
||
{
|
||
npth_attr_t tattr;
|
||
struct sockaddr_un paddr;
|
||
socklen_t plen;
|
||
fd_set fdset, read_fdset;
|
||
int ret;
|
||
gnupg_fd_t fd;
|
||
int nfd;
|
||
int saved_errno;
|
||
struct timespec abstime;
|
||
struct timespec curtime;
|
||
struct timespec timeout;
|
||
#ifdef HAVE_W32_SYSTEM
|
||
HANDLE events[2];
|
||
int events_set;
|
||
#endif
|
||
|
||
ret = npth_attr_init(&tattr);
|
||
if (ret)
|
||
log_fatal ("error allocating thread attributes: %s\n",
|
||
strerror (ret));
|
||
npth_attr_setdetachstate (&tattr, NPTH_CREATE_DETACHED);
|
||
|
||
#ifndef HAVE_W32_SYSTEM
|
||
npth_sigev_init ();
|
||
npth_sigev_add (SIGHUP);
|
||
npth_sigev_add (SIGUSR1);
|
||
npth_sigev_add (SIGUSR2);
|
||
npth_sigev_add (SIGINT);
|
||
npth_sigev_add (SIGTERM);
|
||
npth_sigev_fini ();
|
||
#else
|
||
# ifdef HAVE_W32CE_SYSTEM
|
||
/* Use a dummy event. */
|
||
sigs = 0;
|
||
ev = pth_event (PTH_EVENT_SIGS, &sigs, &signo);
|
||
# else
|
||
events[0] = get_agent_scd_notify_event ();
|
||
events[1] = INVALID_HANDLE_VALUE;
|
||
# endif
|
||
#endif
|
||
|
||
/* Set a flag to tell call-scd.c that it may enable event
|
||
notifications. */
|
||
opt.sigusr2_enabled = 1;
|
||
|
||
FD_ZERO (&fdset);
|
||
FD_SET (FD2INT (listen_fd), &fdset);
|
||
nfd = FD2INT (listen_fd);
|
||
if (listen_fd_ssh != GNUPG_INVALID_FD)
|
||
{
|
||
FD_SET ( FD2INT(listen_fd_ssh), &fdset);
|
||
if (FD2INT (listen_fd_ssh) > nfd)
|
||
nfd = FD2INT (listen_fd_ssh);
|
||
}
|
||
|
||
npth_clock_gettime (&abstime);
|
||
abstime.tv_sec += TIMERTICK_INTERVAL;
|
||
|
||
for (;;)
|
||
{
|
||
/* Shutdown test. */
|
||
if (shutdown_pending)
|
||
{
|
||
if (active_connections == 0)
|
||
break; /* ready */
|
||
|
||
/* Do not accept new connections but keep on running the
|
||
loop to cope with the timer events. */
|
||
FD_ZERO (&fdset);
|
||
}
|
||
|
||
/* 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;
|
||
|
||
npth_clock_gettime (&curtime);
|
||
if (!(npth_timercmp (&curtime, &abstime, <)))
|
||
{
|
||
/* Timeout. */
|
||
handle_tick ();
|
||
npth_clock_gettime (&abstime);
|
||
abstime.tv_sec += TIMERTICK_INTERVAL;
|
||
}
|
||
npth_timersub (&abstime, &curtime, &timeout);
|
||
|
||
#ifndef HAVE_W32_SYSTEM
|
||
ret = npth_pselect (nfd+1, &read_fdset, NULL, NULL, &timeout,
|
||
npth_sigev_sigmask ());
|
||
saved_errno = errno;
|
||
|
||
{
|
||
int signo;
|
||
while (npth_sigev_get_pending (&signo))
|
||
handle_signal (signo);
|
||
}
|
||
#else
|
||
events_set = 0;
|
||
ret = npth_eselect (nfd+1, &read_fdset, NULL, NULL, &timeout,
|
||
events, &events_set);
|
||
saved_errno = errno;
|
||
|
||
/* This is valid even if npth_eselect returns an error. */
|
||
if (events_set & 1)
|
||
agent_sigusr2_action ();
|
||
#endif
|
||
|
||
if (ret == -1 && saved_errno != EINTR)
|
||
{
|
||
log_error (_("npth_pselect failed: %s - waiting 1s\n"),
|
||
strerror (saved_errno));
|
||
npth_sleep (1);
|
||
continue;
|
||
}
|
||
if (ret <= 0)
|
||
/* Interrupt or timeout. Will be handled when calculating the
|
||
next timeout. */
|
||
continue;
|
||
|
||
if (!shutdown_pending && FD_ISSET (FD2INT (listen_fd), &read_fdset))
|
||
{
|
||
ctrl_t ctrl;
|
||
|
||
plen = sizeof paddr;
|
||
fd = INT2FD (npth_accept (FD2INT(listen_fd),
|
||
(struct sockaddr *)&paddr, &plen));
|
||
if (fd == GNUPG_INVALID_FD)
|
||
{
|
||
log_error ("accept failed: %s\n", strerror (errno));
|
||
}
|
||
else if ( !(ctrl = xtrycalloc (1, sizeof *ctrl)) )
|
||
{
|
||
log_error ("error allocating connection control data: %s\n",
|
||
strerror (errno) );
|
||
assuan_sock_close (fd);
|
||
}
|
||
else if ( !(ctrl->session_env = session_env_new ()) )
|
||
{
|
||
log_error ("error allocating session environment block: %s\n",
|
||
strerror (errno) );
|
||
xfree (ctrl);
|
||
assuan_sock_close (fd);
|
||
}
|
||
else
|
||
{
|
||
npth_t thread;
|
||
|
||
ctrl->thread_startup.fd = fd;
|
||
ret = npth_create (&thread, &tattr,
|
||
start_connection_thread, ctrl);
|
||
if (ret)
|
||
{
|
||
log_error ("error spawning connection handler: %s\n",
|
||
strerror (ret));
|
||
assuan_sock_close (fd);
|
||
xfree (ctrl);
|
||
}
|
||
|
||
}
|
||
fd = GNUPG_INVALID_FD;
|
||
}
|
||
|
||
if (!shutdown_pending && listen_fd_ssh != GNUPG_INVALID_FD
|
||
&& FD_ISSET ( FD2INT (listen_fd_ssh), &read_fdset))
|
||
{
|
||
ctrl_t ctrl;
|
||
|
||
plen = sizeof paddr;
|
||
fd = INT2FD(npth_accept (FD2INT(listen_fd_ssh),
|
||
(struct sockaddr *)&paddr, &plen));
|
||
if (fd == GNUPG_INVALID_FD)
|
||
{
|
||
log_error ("accept failed for ssh: %s\n", strerror (errno));
|
||
}
|
||
else if ( !(ctrl = xtrycalloc (1, sizeof *ctrl)) )
|
||
{
|
||
log_error ("error allocating connection control data: %s\n",
|
||
strerror (errno) );
|
||
assuan_sock_close (fd);
|
||
}
|
||
else if ( !(ctrl->session_env = session_env_new ()) )
|
||
{
|
||
log_error ("error allocating session environment block: %s\n",
|
||
strerror (errno) );
|
||
xfree (ctrl);
|
||
assuan_sock_close (fd);
|
||
}
|
||
else
|
||
{
|
||
npth_t thread;
|
||
|
||
agent_init_default_ctrl (ctrl);
|
||
ctrl->thread_startup.fd = fd;
|
||
ret = npth_create (&thread, &tattr,
|
||
start_connection_thread_ssh, ctrl);
|
||
if (ret)
|
||
{
|
||
log_error ("error spawning ssh connection handler: %s\n",
|
||
strerror (ret));
|
||
assuan_sock_close (fd);
|
||
xfree (ctrl);
|
||
}
|
||
}
|
||
fd = GNUPG_INVALID_FD;
|
||
}
|
||
}
|
||
|
||
cleanup ();
|
||
log_info (_("%s %s stopped\n"), strusage(11), strusage(13));
|
||
npth_attr_destroy (&tattr);
|
||
}
|
||
|
||
|
||
|
||
/* Helper for check_own_socket. */
|
||
static gpg_error_t
|
||
check_own_socket_pid_cb (void *opaque, const void *buffer, size_t length)
|
||
{
|
||
membuf_t *mb = opaque;
|
||
put_membuf (mb, buffer, length);
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* The thread running the actual check. We need to run this in a
|
||
separate thread so that check_own_thread can be called from the
|
||
timer tick. */
|
||
static void *
|
||
check_own_socket_thread (void *arg)
|
||
{
|
||
int rc;
|
||
char *sockname = arg;
|
||
assuan_context_t ctx = NULL;
|
||
membuf_t mb;
|
||
char *buffer;
|
||
|
||
check_own_socket_running++;
|
||
|
||
rc = assuan_new (&ctx);
|
||
if (rc)
|
||
{
|
||
log_error ("can't allocate assuan context: %s\n", gpg_strerror (rc));
|
||
goto leave;
|
||
}
|
||
|
||
rc = assuan_socket_connect (ctx, sockname, (pid_t)(-1), 0);
|
||
if (rc)
|
||
{
|
||
log_error ("can't connect my own socket: %s\n", gpg_strerror (rc));
|
||
goto leave;
|
||
}
|
||
|
||
init_membuf (&mb, 100);
|
||
rc = assuan_transact (ctx, "GETINFO pid", check_own_socket_pid_cb, &mb,
|
||
NULL, NULL, NULL, NULL);
|
||
put_membuf (&mb, "", 1);
|
||
buffer = get_membuf (&mb, NULL);
|
||
if (rc || !buffer)
|
||
{
|
||
log_error ("sending command \"%s\" to my own socket failed: %s\n",
|
||
"GETINFO pid", gpg_strerror (rc));
|
||
rc = 1;
|
||
}
|
||
else if ( (pid_t)strtoul (buffer, NULL, 10) != getpid ())
|
||
{
|
||
log_error ("socket is now serviced by another server\n");
|
||
rc = 1;
|
||
}
|
||
else if (opt.verbose > 1)
|
||
log_error ("socket is still served by this server\n");
|
||
|
||
xfree (buffer);
|
||
|
||
leave:
|
||
xfree (sockname);
|
||
if (ctx)
|
||
assuan_release (ctx);
|
||
if (rc)
|
||
{
|
||
/* We may not remove the socket as it is now in use by another
|
||
server. Setting the name to empty does this. */
|
||
if (socket_name)
|
||
*socket_name = 0;
|
||
if (socket_name_ssh)
|
||
*socket_name_ssh = 0;
|
||
shutdown_pending = 2;
|
||
log_info ("this process is useless - shutting down\n");
|
||
}
|
||
check_own_socket_running--;
|
||
return NULL;
|
||
}
|
||
|
||
|
||
/* Check whether we are still listening on our own socket. In case
|
||
another gpg-agent process started after us has taken ownership of
|
||
our socket, we would linger around without any real task. Thus we
|
||
better check once in a while whether we are really needed. */
|
||
static void
|
||
check_own_socket (void)
|
||
{
|
||
char *sockname;
|
||
npth_t thread;
|
||
npth_attr_t tattr;
|
||
int err;
|
||
|
||
if (!opt.use_standard_socket)
|
||
return; /* This check makes only sense in standard socket mode. */
|
||
|
||
if (check_own_socket_running || shutdown_pending)
|
||
return; /* Still running or already shutting down. */
|
||
|
||
sockname = make_filename (opt.homedir, "S.gpg-agent", NULL);
|
||
if (!sockname)
|
||
return; /* Out of memory. */
|
||
|
||
err = npth_attr_init (&tattr);
|
||
if (err)
|
||
return;
|
||
npth_attr_setdetachstate (&tattr, NPTH_CREATE_DETACHED);
|
||
err = npth_create (&thread, &tattr, check_own_socket_thread, sockname);
|
||
if (err)
|
||
log_error ("error spawning check_own_socket_thread: %s\n", strerror (err));
|
||
npth_attr_destroy (&tattr);
|
||
}
|
||
|
||
|
||
|
||
/* Figure out whether an agent is available and running. Prints an
|
||
error if not. If SILENT is true, no messages are printed. Usually
|
||
started with MODE 0. Returns 0 if the agent is running. */
|
||
static int
|
||
check_for_running_agent (int silent, int mode)
|
||
{
|
||
int rc;
|
||
char *infostr, *p;
|
||
assuan_context_t ctx = NULL;
|
||
int prot, pid;
|
||
|
||
if (!mode)
|
||
{
|
||
infostr = getenv ("GPG_AGENT_INFO");
|
||
if (!infostr || !*infostr)
|
||
{
|
||
if (!check_for_running_agent (silent, 1))
|
||
return 0; /* Okay, its running on the standard socket. */
|
||
if (!silent)
|
||
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 (silent, 1))
|
||
return 0; /* Okay, its running on the standard socket. */
|
||
if (!silent)
|
||
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);
|
||
if (!silent)
|
||
log_error (_("gpg-agent protocol version %d is not supported\n"),
|
||
prot);
|
||
if (!check_for_running_agent (silent, 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_new (&ctx);
|
||
if (! rc)
|
||
rc = assuan_socket_connect (ctx, infostr, pid, 0);
|
||
xfree (infostr);
|
||
if (rc)
|
||
{
|
||
if (!mode && !check_for_running_agent (silent, 1))
|
||
return 0; /* Okay, its running on the standard socket. */
|
||
|
||
if (!mode && !silent)
|
||
log_error ("can't connect to the agent: %s\n", gpg_strerror (rc));
|
||
|
||
if (ctx)
|
||
assuan_release (ctx);
|
||
return -1;
|
||
}
|
||
|
||
if (!opt.quiet && !silent)
|
||
log_info ("gpg-agent running and available\n");
|
||
|
||
assuan_release (ctx);
|
||
return 0;
|
||
}
|
||
|
||
/* TODO: it is also in misc, which is not linked with the agent */
|
||
/* FIXME: The agent should not know about openpgp internals - weel
|
||
except for some stuff in cvt-openpgp. */
|
||
int
|
||
map_pk_openpgp_to_gcry (int algo)
|
||
{
|
||
return (algo==PUBKEY_ALGO_ECDSA ? GCRY_PK_ECDSA : (algo==PUBKEY_ALGO_ECDH ? GCRY_PK_ECDH : algo));
|
||
}
|