mirror of
git://git.gnupg.org/gnupg.git
synced 2025-07-02 22:46:30 +02:00
Added new directory common to enable sharing of some code and error
numbers between gpg, gpgsm and gpg-agent. Move some files and code to there.
This commit is contained in:
Werner Koch
parent
8e58435312
commit
bab7fa0b29
21 changed files with 1395 additions and 235 deletions
984
agent/gpg-agent.c
Normal file
984
agent/gpg-agent.c
Normal file
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@ -0,0 +1,984 @@
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/* gpg-agent.c - The GnuPG Agent
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* Copyright (C) 2000, 2001 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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/*
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* How to use the client mode:
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* printf '\0\0\0\002AAAAAAAAAAAAAAAAAAAAAPlease enter the passphrase for\n
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* key 0x12345678\nJoe Hacker <joe@hackworld.foo>\n'
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* | ./gpg-agent --client | od
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* Or use a builtin command to shut the agent down.
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* ./gpg-agent --shutdown | od
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*
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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 <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 <unistd.h>
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#include <signal.h>
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#include <gcrypt.h>
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#include "util.h"
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#include "../assuan/assuan.h" /* malloc hooks */
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#include "i18n.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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oOptions,
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oDebug,
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oDebugAll,
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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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oClient,
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oShutdown,
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oFlush,
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oLogFile,
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oServer,
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aTest };
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static ARGPARSE_OPTS opts[] = {
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{ 301, NULL, 0, N_("@Options:\n ") },
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/* FIXME: add option --server */
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{ oServer, "server", 0, N_("run in server mode") },
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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_("read options from file")},
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{ oDebug, "debug" ,4|16, N_("set debugging flags")},
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{ oDebugAll, "debug-all" ,0, N_("enable full debugging")},
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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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{ oClient, "client" ,0, N_("run in client mode for testing")},
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{ oLogFile, "log-file" ,2, N_("use a log file for the server")},
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{ oShutdown, "shutdown" ,0, N_("shutdown the agent")},
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{ oFlush , "flush" ,0, N_("flush the cache")},
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{0}
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};
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static struct {
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const char *homedir;
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int client;
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int verbose;
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int quiet;
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unsigned int debug;
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int nodetach;
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int grab;
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const char *logfile;
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int csh_style;
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} opt;
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typedef struct {
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int used;
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char fpr[20];
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char *pw;
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size_t pwlen;
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size_t totlen;
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} CACHE_SLOT;
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#define MAX_CACHE_ENTRIES 10
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#define MAX_CACHE_AGE 1000 /* should fit into an integer */
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static volatile int caught_fatal_sig = 0;
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static volatile int shut_me_down = 0;
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static CACHE_SLOT the_cache[MAX_CACHE_ENTRIES];
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static char *socket_name = NULL;
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#define buftou32( p ) ((*(byte*)(p) << 24) | (*((byte*)(p)+1)<< 16) | \
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(*((byte*)(p)+2) << 8) | (*((byte*)(p)+3)))
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#define u32tobuf( p, a ) do { \
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((byte*)p)[0] = (byte)((a) >> 24); \
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((byte*)p)[1] = (byte)((a) >> 16); \
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((byte*)p)[2] = (byte)((a) >> 8); \
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((byte*)p)[3] = (byte)((a) ); \
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} while(0)
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static int start_listening ( const char *name );
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static int writen ( int fd, const void *buf, size_t nbytes );
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static int readn ( int fd, void *buf, size_t buflen, size_t *ret_nread );
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static void process_request ( int fd );
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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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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 =
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_("Please report bugs to <bug-gnupg@gnu.org>.\n");
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break;
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case 1:
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case 40: p =
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_("Usage: gpg-agent [options] (-h for help)");
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break;
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case 41: p =
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_("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 );
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#else
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#ifdef ENABLE_NLS
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/* gtk_set_locale (); HMMM: We have not yet called gtk_init */
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bindtextdomain( PACKAGE, GNUPG_LOCALEDIR );
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textdomain( PACKAGE );
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#endif
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#endif
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}
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static void
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cleanup (void)
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{
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if (socket_name)
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{
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char *p = socket_name;
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socket_name = NULL;
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remove ( p );
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gcry_free (p);
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}
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}
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static RETSIGTYPE
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cleanup_sh (int sig)
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{
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if (caught_fatal_sig)
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raise (sig);
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caught_fatal_sig = 1;
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shut_me_down = 1;
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/* gcry_control( GCRYCTL_TERM_SECMEM );*/
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cleanup ();
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#ifndef HAVE_DOSISH_SYSTEM
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{ /* reset action to default action and raise signal again */
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struct sigaction nact;
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nact.sa_handler = SIG_DFL;
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sigemptyset( &nact.sa_mask );
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nact.sa_flags = 0;
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sigaction( sig, &nact, NULL);
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}
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#endif
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raise( sig );
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}
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int
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main (int argc, char **argv )
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{
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ARGPARSE_ARGS pargs;
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int orig_argc;
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char **orig_argv;
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FILE *configfp = NULL;
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char *configname = NULL;
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const char *shell;
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unsigned configlineno;
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int parse_debug = 0;
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int default_config =1;
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int greeting = 0;
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int nogreeting = 0;
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int server_mode = 0;
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int do_shutdown = 0;
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int do_flush = 0;
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set_strusage( my_strusage );
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/* log_set_name ("gpg-agent"); */
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srand (time (NULL)); /* the about dialog uses rand() */
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i18n_init ();
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/* check that the libraries are suitable. Do it here because
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the option parsing may need services of the library */
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if (!gcry_check_version ( "1.1.4" ) )
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{
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log_fatal( _("libgcrypt is too old (need %s, have %s)\n"),
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VERSION, gcry_check_version (NULL) );
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}
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assuan_set_malloc_hooks (gcry_malloc, gcry_realloc, gcry_free);
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shell = getenv("SHELL");
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if (shell && strlen(shell) >= 3 && !strcmp(shell+strlen(shell)-3, "csh") )
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opt.csh_style = 1;
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opt.homedir = getenv("GNUPGHOME");
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if (!opt.homedir || !*opt.homedir)
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{
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#ifdef HAVE_DRIVE_LETTERS
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opt.homedir = "c:/gnupg-test";
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#else
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opt.homedir = "~/.gnupg-test";
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#endif
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}
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opt.grab = 1;
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/* check whether we have a config file on the commandline */
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orig_argc = argc;
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orig_argv = argv;
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pargs.argc = &argc;
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pargs.argv = &argv;
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pargs.flags= 1|(1<<6); /* do not remove the args, ignore version */
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while (arg_parse( &pargs, opts))
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{
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if (pargs.r_opt == oDebug || pargs.r_opt == oDebugAll)
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parse_debug++;
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else if (pargs.r_opt == oOptions)
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{ /* yes there is one, so we do not try the default one, but
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read the option file when it is encountered at the
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commandline */
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default_config = 0;
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}
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else if (pargs.r_opt == oNoOptions)
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default_config = 0; /* --no-options */
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else if (pargs.r_opt == oHomedir)
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opt.homedir = pargs.r.ret_str;
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}
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if (default_config)
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configname = make_filename (opt.homedir, "gpg-agent.conf", NULL );
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argc = orig_argc;
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argv = orig_argv;
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pargs.argc = &argc;
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pargs.argv = &argv;
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pargs.flags= 1; /* do not remove the args */
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next_pass:
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if (configname)
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{
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configlineno = 0;
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configfp = fopen (configname, "r");
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if (!configfp)
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{
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if (default_config)
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{
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if( parse_debug )
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log_info (_("NOTE: no default option file `%s'\n"),
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configname );
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}
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else
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{
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log_error (_("option file `%s': %s\n"),
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configname, strerror(errno) );
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exit(2);
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}
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xfree (configname);
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configname = NULL;
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}
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if (parse_debug && configname )
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log_info (_("reading options from `%s'\n"), configname );
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default_config = 0;
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}
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while (optfile_parse( configfp, configname, &configlineno, &pargs, opts) )
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{
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switch (pargs.r_opt)
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{
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case oQuiet: opt.quiet = 1; break;
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case oVerbose: opt.verbose++; break;
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case oDebug: opt.debug |= pargs.r.ret_ulong; break;
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case oDebugAll: opt.debug = ~0; break;
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case oOptions:
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/* config files may not be nested (silently ignore them) */
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if (!configfp)
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{
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xfree(configname);
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configname = xstrdup(pargs.r.ret_str);
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goto next_pass;
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}
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break;
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case oNoGreeting: nogreeting = 1; break;
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case oNoVerbose: opt.verbose = 0; break;
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case oNoOptions: break; /* no-options */
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case oHomedir: opt.homedir = pargs.r.ret_str; break;
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case oNoDetach: opt.nodetach = 1; break;
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case oNoGrab: opt.grab = 0; break;
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case oClient: opt.client = 1; break;
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case oShutdown: opt.client = 1; do_shutdown = 1; break;
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case oFlush: opt.client = 1; do_flush = 1; break;
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case oLogFile: opt.logfile = pargs.r.ret_str; break;
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case oCsh: opt.csh_style = 1; break;
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case oSh: opt.csh_style = 0; break;
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case oServer: server_mode = 1; break;
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default : pargs.err = configfp? 1:2; break;
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}
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}
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if (configfp)
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{
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fclose( configfp );
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configfp = NULL;
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xfree(configname);
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configname = NULL;
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goto next_pass;
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}
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xfree (configname);
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configname = NULL;
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if (log_get_errorcount(0))
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exit(2);
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if (nogreeting )
|
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greeting = 0;
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|
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if (greeting)
|
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{
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fprintf (stderr, "%s %s; %s\n",
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strusage(11), strusage(13), strusage(14) );
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fprintf (stderr, "%s\n", strusage(15) );
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}
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#ifdef IS_DEVELOPMENT_VERSION
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log_info ("NOTE: this is a development version!\n");
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#endif
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socket_name = make_filename (opt.homedir, "S.gpg-agent", NULL );
|
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if (strchr ( socket_name, ':') )
|
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{
|
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log_error ("colons are not allowed in the socket name\n");
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exit (1);
|
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}
|
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|
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if (opt.client)
|
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{ /* a client for testing this agent */
|
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#if 0 /* FIXME: We are going to use assuan here */
|
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int fd;
|
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struct sockaddr_un client_addr;
|
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size_t len;
|
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char buffer[1000];
|
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int nread;
|
||||
|
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if ( strlen (socket_name)+1 >= sizeof client_addr.sun_path ) {
|
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log_error ("name of socket to long\n");
|
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exit (1);
|
||||
}
|
||||
|
||||
if( (fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1 )
|
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log_fatal("can't create socket: %s\n", strerror(errno) );
|
||||
|
||||
memset( &client_addr, 0, sizeof client_addr );
|
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client_addr.sun_family = AF_UNIX;
|
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strcpy( client_addr.sun_path, socket_name );
|
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len = offsetof (struct sockaddr_un, sun_path)
|
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+ strlen(client_addr.sun_path) + 1;
|
||||
|
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if( connect( fd, (struct sockaddr*)&client_addr, len ) == -1 ) {
|
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log_error ( "connect() failed: %s\n", strerror (errno) );
|
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exit (1);
|
||||
}
|
||||
|
||||
if ( do_shutdown ) {
|
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u32tobuf (buffer+4, GPGA_PROT_SHUTDOWN );
|
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nread = 4;
|
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}
|
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else if ( do_flush ) {
|
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u32tobuf (buffer+4, GPGA_PROT_FLUSH );
|
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nread = 4;
|
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}
|
||||
else {
|
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nread = fread ( buffer+4, 1, DIM(buffer)-4, stdin );
|
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|
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if ( opt.verbose )
|
||||
log_info ( "%d bytes read from stdin\n", nread );
|
||||
}
|
||||
u32tobuf (buffer, nread );
|
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writen ( fd, "GPGA\0\0\0\x01", 8 );
|
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writen ( fd, buffer, nread + 4 );
|
||||
/* now read the response */
|
||||
readn ( fd, buffer, DIM(buffer), &nread );
|
||||
if ( opt.verbose )
|
||||
log_info ( "%d bytes got from agent\n", nread );
|
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|
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fwrite ( buffer, 1, nread, stdout );
|
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close (fd );
|
||||
#endif
|
||||
}
|
||||
else
|
||||
{ /* regular server mode */
|
||||
int listen_fd;
|
||||
pid_t child;
|
||||
int i;
|
||||
|
||||
listen_fd = start_listening (socket_name);
|
||||
if (listen_fd == -1)
|
||||
{
|
||||
cleanup ();
|
||||
exit (1);
|
||||
}
|
||||
|
||||
|
||||
fflush (NULL);
|
||||
child = fork ();
|
||||
if (child == -1)
|
||||
{
|
||||
log_fatal ("fork failed: %s\n", strerror (errno) );
|
||||
cleanup ();
|
||||
exit (1);
|
||||
}
|
||||
else if ( child )
|
||||
{ /* parent */
|
||||
char *infostr;
|
||||
|
||||
close (listen_fd );
|
||||
|
||||
/* create the info string */
|
||||
infostr = xmalloc ( 20 + strlen(socket_name) + 30 + 2 );
|
||||
sprintf ( infostr, "GPG_AGENT_INFO=%s:%lu",
|
||||
socket_name, (ulong)child );
|
||||
if ( argc )
|
||||
{ /* run the program given on the commandline */
|
||||
if (putenv (infostr))
|
||||
{
|
||||
log_error ("failed to set environment: %s\n",
|
||||
strerror (errno) );
|
||||
kill (child, SIGTERM );
|
||||
cleanup ();
|
||||
exit (1);
|
||||
}
|
||||
execvp (argv[0], argv);
|
||||
log_error ("failed to run the command: %s\n",
|
||||
strerror (errno));
|
||||
kill (child, SIGTERM);
|
||||
cleanup ();
|
||||
exit (1);
|
||||
}
|
||||
/* print the environment string, so that the caller can use
|
||||
eval to set it */
|
||||
if (opt.csh_style)
|
||||
{
|
||||
*strchr (infostr, '=') = ' ';
|
||||
printf ( "setenv %s\n", infostr);
|
||||
}
|
||||
else
|
||||
{
|
||||
printf ( "%s; export GPG_AGENT_INFO;\n", infostr);
|
||||
}
|
||||
exit (0);
|
||||
} /* end parent */
|
||||
|
||||
if ( (opt.debug & 1) )
|
||||
sleep( 20 ); /* give us some time to attach gdb to the child */
|
||||
|
||||
if (opt.logfile)
|
||||
{
|
||||
/* FIXME:log_set_logfile (opt.logfile, -1);*/
|
||||
}
|
||||
|
||||
if ( atexit( cleanup ) )
|
||||
{
|
||||
log_error ("atexit failed\n");
|
||||
cleanup ();
|
||||
exit (1);
|
||||
}
|
||||
|
||||
if ( !opt.nodetach )
|
||||
{
|
||||
for (i=0 ; i <= 2; i++ )
|
||||
{
|
||||
if ( log_get_fd () != i)
|
||||
close ( i );
|
||||
}
|
||||
|
||||
if (setsid() == -1)
|
||||
{
|
||||
log_error ("setsid() failed: %s\n", strerror(errno) );
|
||||
cleanup ();
|
||||
exit (1);
|
||||
}
|
||||
}
|
||||
|
||||
{
|
||||
struct sigaction oact, nact;
|
||||
|
||||
nact.sa_handler = cleanup_sh;
|
||||
sigemptyset ( &nact.sa_mask );
|
||||
nact.sa_flags = 0;
|
||||
|
||||
sigaction ( SIGHUP, NULL, &oact );
|
||||
if ( oact.sa_handler != SIG_IGN )
|
||||
sigaction( SIGHUP, &nact, NULL);
|
||||
sigaction( SIGTERM, NULL, &oact );
|
||||
if ( oact.sa_handler != SIG_IGN )
|
||||
sigaction( SIGTERM, &nact, NULL);
|
||||
nact.sa_handler = SIG_IGN;
|
||||
sigaction( SIGPIPE, &nact, NULL );
|
||||
sigaction( SIGINT, &nact, NULL );
|
||||
}
|
||||
|
||||
if ( chdir("/") )
|
||||
{
|
||||
log_error ("chdir to / failed: %s\n", strerror (errno) );
|
||||
exit (1);
|
||||
}
|
||||
|
||||
/* for now there is no need for concurrent requests because we
|
||||
are asking for passphrases which might pop up a window to get
|
||||
the users respond. In future the agent may provide other
|
||||
services which won't need a user interaction */
|
||||
#if 0
|
||||
while (!shut_me_down)
|
||||
{
|
||||
struct sockaddr_un clnt_addr;
|
||||
size_t len = sizeof clnt_addr;
|
||||
int fd;
|
||||
/* FIXME: convert to assuan */
|
||||
fd = accept ( listen_fd, (struct sockaddr*)&clnt_addr, &len );
|
||||
if ( fd == -1 )
|
||||
log_error ( "accept() failed: %s\n", strerror (errno));
|
||||
else
|
||||
{
|
||||
process_request ( fd );
|
||||
close (fd );
|
||||
}
|
||||
}
|
||||
#endif
|
||||
close (listen_fd);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
start_listening (const char *name)
|
||||
{
|
||||
#if 0
|
||||
int len;
|
||||
int fd;
|
||||
struct sockaddr_un serv_addr;
|
||||
|
||||
if (opt.verbose)
|
||||
log_info ("using socket `%s'\n", socket_name );
|
||||
|
||||
if (strlen (socket_name)+1 >= sizeof serv_addr.sun_path )
|
||||
{
|
||||
log_error ("name of socket to long\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1 )
|
||||
log_fatal("can't create socket: %s\n", strerror(errno) );
|
||||
|
||||
memset( &serv_addr, 0, sizeof serv_addr );
|
||||
serv_addr.sun_family = AF_UNIX;
|
||||
strcpy( serv_addr.sun_path, socket_name );
|
||||
len = (offsetof (struct sockaddr_un, sun_path)
|
||||
+ strlen(serv_addr.sun_path) + 1);
|
||||
|
||||
remove (socket_name); errno = 0;
|
||||
if (bind( fd, (struct sockaddr*)&serv_addr, len ) == -1 )
|
||||
{
|
||||
log_error ( "error binding address `%s': %m\n", serv_addr.sun_path );
|
||||
close (fd );
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (listen (fd, 5 ) == -1)
|
||||
{
|
||||
log_error ( "listen() failed: %s\n", strerror (errno) );
|
||||
close ( fd );
|
||||
return -1;
|
||||
}
|
||||
#endif
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Look for the passprase as given by the 20 bytes DATA and return it's
|
||||
slot number. If this passphrase is not in the cache, return -1 */
|
||||
static int
|
||||
open_cached_passphrase ( const char *fpr )
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i=0; i < MAX_CACHE_ENTRIES; i++ )
|
||||
{
|
||||
if (the_cache[i].used && !memcmp (the_cache[i].fpr, fpr, 20))
|
||||
{
|
||||
if ( the_cache[i].used < MAX_CACHE_AGE )
|
||||
the_cache[i].used++;
|
||||
return i;
|
||||
}
|
||||
}
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Get pointers to the cached passphrase and return the real length
|
||||
PWLEN as well as the somewhat larger BLOCKLEN */
|
||||
static const char *
|
||||
read_cached_passphrase (int slot, size_t *pwlen, size_t *blocklen)
|
||||
{
|
||||
assert (slot >=0 && slot < MAX_CACHE_ENTRIES);
|
||||
*pwlen = the_cache[slot].pwlen;
|
||||
*blocklen = the_cache[slot].totlen;
|
||||
return the_cache[slot].pw;
|
||||
}
|
||||
|
||||
static const void
|
||||
clear_cached_passphrase ( int slot )
|
||||
{
|
||||
assert ( slot >=0 && slot < MAX_CACHE_ENTRIES );
|
||||
xfree (the_cache[slot].pw );
|
||||
the_cache[slot].pw = NULL;
|
||||
the_cache[slot].used = 0;
|
||||
}
|
||||
|
||||
static void
|
||||
close_cached_passphrase ( int slot )
|
||||
{
|
||||
/* not yet needed */
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
set_cached_passphrase ( const char *fpr, const char *pw )
|
||||
{
|
||||
int i, min_used = MAX_CACHE_AGE, slot = -1;
|
||||
|
||||
for (i=0; i < 20 && !fpr[i]; i++ )
|
||||
;
|
||||
if (i== 20)
|
||||
return; /* never cache an all empty fingerprint */
|
||||
|
||||
/* first see whether we have already cached this one */
|
||||
for (i=0; i < MAX_CACHE_ENTRIES; i++ )
|
||||
{
|
||||
if ( the_cache[i].used && !memcmp (the_cache[i].fpr, fpr, 20) )
|
||||
{
|
||||
slot = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (slot == -1)
|
||||
{ /* Find an unused one or reuse one */
|
||||
for (i=0; i < MAX_CACHE_ENTRIES; i++ )
|
||||
{
|
||||
if ( !the_cache[i].used ) {
|
||||
slot = i;
|
||||
break;
|
||||
}
|
||||
if ( the_cache[i].used < min_used )
|
||||
{
|
||||
min_used = the_cache[i].used;
|
||||
slot = i;
|
||||
}
|
||||
}
|
||||
assert ( slot != -1 );
|
||||
}
|
||||
xfree (the_cache[slot].pw);
|
||||
/* fixme: Allocate to fixed sizes */
|
||||
the_cache[slot].used = 1;
|
||||
memcpy (the_cache[slot].fpr, fpr, 20 );
|
||||
the_cache[slot].pw = gcry_xstrdup ( pw );
|
||||
the_cache[slot].pwlen = strlen ( pw );
|
||||
the_cache[slot].totlen = strlen ( pw );
|
||||
}
|
||||
|
||||
|
||||
|
||||
static int
|
||||
passphrase_dialog ( const byte *fpr, const char *user_string )
|
||||
{
|
||||
/* FIXME: call the PIN-ENtry */
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
|
||||
static int
|
||||
writen ( int fd, const void *buf, size_t nbytes )
|
||||
{
|
||||
size_t nleft = nbytes;
|
||||
ssize_t nwritten;
|
||||
|
||||
while (nleft > 0)
|
||||
{
|
||||
nwritten = write( fd, buf, nleft );
|
||||
if ( nwritten < 0 )
|
||||
{
|
||||
log_error ( "writen() failed: %s\n", strerror (errno) );
|
||||
return -1;
|
||||
}
|
||||
nleft -= nwritten;
|
||||
buf = (const char*)buf + nwritten;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
readn ( int fd, void *buf, size_t buflen, size_t *ret_nread )
|
||||
{
|
||||
size_t nleft = buflen;
|
||||
int nread;
|
||||
char *p;
|
||||
|
||||
p = buf;
|
||||
while (nleft > 0 )
|
||||
{
|
||||
nread = read ( fd, buf, nleft );
|
||||
if ( nread < 0 )
|
||||
{
|
||||
log_error ( "read() error: %s\n", strerror (errno) );
|
||||
return -1;
|
||||
}
|
||||
else if (!nread )
|
||||
break; /* EOF */
|
||||
nleft -= nread;
|
||||
buf = (char*)buf + nread;
|
||||
}
|
||||
if (ret_nread )
|
||||
*ret_nread = buflen - nleft;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
static void
|
||||
reply_error ( int fd, int x )
|
||||
{
|
||||
/*FIXME:*/
|
||||
}
|
||||
|
||||
static void
|
||||
reply ( int fd, int x, const char *data, size_t datalen )
|
||||
{
|
||||
/*FIXME:*/
|
||||
}
|
||||
|
||||
static void
|
||||
req_get_version ( int fd, const char *data, size_t datalen )
|
||||
{
|
||||
/*FIXME:*/
|
||||
}
|
||||
|
||||
static void
|
||||
req_get_passphrase ( int fd, const char *data, size_t datalen )
|
||||
{
|
||||
#if 0
|
||||
int slot;
|
||||
const char *pw;
|
||||
size_t pwlen, blocklen;
|
||||
|
||||
if (datalen < 20)
|
||||
{
|
||||
reply_error ( fd, GPGA_PROT_INVALID_DATA );
|
||||
return;
|
||||
}
|
||||
|
||||
slot = open_cached_passphrase ( data );
|
||||
if ( slot == -1 )
|
||||
{
|
||||
int rc;
|
||||
char *string;
|
||||
|
||||
if ( datalen > 20 )
|
||||
{
|
||||
string = xmalloc ( datalen - 20 + 1 );
|
||||
memcpy (string, data+20, datalen-20 );
|
||||
string[datalen-20] = 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
string = xstrdup ("[fingerprint]");
|
||||
}
|
||||
rc = passphrase_dialog ( data, string );
|
||||
xfree (string);
|
||||
if (rc)
|
||||
{
|
||||
reply_error ( fd, rc );
|
||||
return;
|
||||
}
|
||||
slot = open_cached_passphrase ( data );
|
||||
if (slot < 0)
|
||||
BUG ();
|
||||
}
|
||||
|
||||
pw = read_cached_passphrase ( slot, &pwlen, &blocklen );
|
||||
if (!pw || blocklen < pwlen)
|
||||
BUG ();
|
||||
#if 0 /* FIXME: */
|
||||
/* we do a hardcoded reply here to avoid copying of the passphrase
|
||||
* from the cache to a temporary buffer */
|
||||
{
|
||||
byte buf[20];
|
||||
|
||||
u32tobuf ( buf+0, (8+blocklen) );
|
||||
u32tobuf ( buf+4, GPGA_PROT_GOT_PASSPHRASE );
|
||||
u32tobuf ( buf+8, pwlen );
|
||||
writen ( fd, buf, 12 );
|
||||
writen ( fd, pw, blocklen );
|
||||
}
|
||||
#endif
|
||||
close_cached_passphrase ( slot );
|
||||
#endif
|
||||
}
|
||||
|
||||
static void
|
||||
req_clear_passphrase ( int fd, const char *data, size_t datalen )
|
||||
{
|
||||
#if 0
|
||||
int slot;
|
||||
|
||||
if ( datalen < 20 )
|
||||
{
|
||||
reply_error ( fd, GPGA_PROT_INVALID_DATA );
|
||||
return;
|
||||
}
|
||||
|
||||
slot = open_cached_passphrase ( data );
|
||||
if ( slot == -1 )
|
||||
{
|
||||
reply_error ( fd, GPGA_PROT_NO_PASSPHRASE );
|
||||
return;
|
||||
}
|
||||
|
||||
clear_cached_passphrase ( slot );
|
||||
close_cached_passphrase ( slot );
|
||||
reply_error (fd, GPGA_PROT_OKAY );
|
||||
#endif
|
||||
}
|
||||
|
||||
static void
|
||||
req_shutdown ( int fd, const char *data, size_t datalen )
|
||||
{
|
||||
shut_me_down = 1;
|
||||
/* reply ( fd, GPGA_PROT_OKAY, "", 0 ); */
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
req_flush ( int fd, const char *data, size_t datalen )
|
||||
{
|
||||
int i;
|
||||
|
||||
/* FIXME: when using multiple connections we need to cope with locking */
|
||||
for (i=0; i < MAX_CACHE_ENTRIES; i++ )
|
||||
{
|
||||
if ( the_cache[i].used ) {
|
||||
xfree ( the_cache[i].pw );
|
||||
the_cache[i].pw = NULL;
|
||||
the_cache[i].used = 0;
|
||||
}
|
||||
}
|
||||
/* reply ( fd, GPGA_PROT_OKAY, "", 0 ); */
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
process_request ( int fd )
|
||||
{
|
||||
#if 0
|
||||
byte buf[3000]; /* Below is a hardcoded max. length check */
|
||||
byte *data;
|
||||
size_t n, nread;
|
||||
|
||||
/* Check the magic and the protocol number */
|
||||
if ( readn ( fd, buf, 12, &nread ) )
|
||||
goto read_failure;
|
||||
if ( nread != 12 || memcmp ( buf, "GPGA\0\0\0\x01", 8 ) ) {
|
||||
reply_error ( fd, GPGA_PROT_PROTOCOL_ERROR );
|
||||
return;
|
||||
}
|
||||
n = buftou32 ( buf + 8 ); /* length of following packet */
|
||||
if ( n < 4 || n > 2048 ) {
|
||||
reply_error ( fd, GPGA_PROT_INVALID_DATA );
|
||||
return;
|
||||
}
|
||||
/* read the request packet */
|
||||
if ( readn ( fd, buf, n, &nread ) )
|
||||
goto read_failure;
|
||||
if ( nread != n ) {
|
||||
reply_error ( fd, GPGA_PROT_PROTOCOL_ERROR );
|
||||
return;
|
||||
}
|
||||
/* dispatch the request */
|
||||
n -= 4;
|
||||
data = buf+4;
|
||||
switch ( buftou32 ( buf ) ) {
|
||||
case GPGA_PROT_GET_VERSION:
|
||||
req_get_version ( fd, data, n );
|
||||
break;
|
||||
case GPGA_PROT_GET_PASSPHRASE:
|
||||
req_get_passphrase (fd, data, n);
|
||||
break;
|
||||
case GPGA_PROT_CLEAR_PASSPHRASE:
|
||||
req_clear_passphrase (fd, data, n );
|
||||
break;
|
||||
case GPGA_PROT_SHUTDOWN:
|
||||
req_shutdown (fd, data, n );
|
||||
break;
|
||||
case GPGA_PROT_FLUSH:
|
||||
req_flush (fd, data, n );
|
||||
break;
|
||||
|
||||
default:
|
||||
reply_error ( fd, GPGA_PROT_INVALID_REQUEST );
|
||||
break;
|
||||
}
|
||||
|
||||
return;
|
||||
|
||||
read_failure:
|
||||
/* it does not make sense to respond in this case */
|
||||
log_error ( "read failure: %s\n", strerror(errno));
|
||||
return;
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue