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gnupg/agent/gpg-agent.c
Werner Koch 61ba223221 * gpg-agent.c (main): New option --batch. New option --debug-wait 
n, so that it is possible to attach gdb when used in server mode.
* query.c (agent_askpin): Don't ask in batch mode.
2001-12-14 15:39:44 +00:00

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/* gpg-agent.c - The GnuPG Agent
* Copyright (C) 2000, 2001 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <time.h>
#include <fcntl.h>
#include <unistd.h>
#include <signal.h>
#include <gcrypt.h>
#define JNLIB_NEED_LOG_LOGV
#include "agent.h"
#include "../assuan/assuan.h" /* malloc hooks */
#define N_(a) a
#define _(a) a
enum cmd_and_opt_values
{ aNull = 0,
oCsh = 'c',
oQuiet = 'q',
oSh = 's',
oVerbose = 'v',
oNoVerbose = 500,
oOptions,
oDebug,
oDebugAll,
oDebugWait,
oNoGreeting,
oNoOptions,
oHomedir,
oNoDetach,
oNoGrab,
oClient,
oShutdown,
oFlush,
oLogFile,
oServer,
oBatch,
oPinentryProgram,
aTest };
static ARGPARSE_OPTS opts[] = {
{ 301, NULL, 0, N_("@Options:\n ") },
{ oServer, "server", 0, N_("run in server mode") },
{ oVerbose, "verbose", 0, N_("verbose") },
{ oQuiet, "quiet", 0, N_("be somewhat more quiet") },
{ oSh, "sh", 0, N_("sh-style command output") },
{ oCsh, "csh", 0, N_("csh-style command output") },
{ oOptions, "options" , 2, N_("read options from file")},
{ oDebug, "debug" ,4|16, N_("set debugging flags")},
{ oDebugAll, "debug-all" ,0, N_("enable full debugging")},
{ oDebugWait,"debug-wait",1, "@"},
{ oNoDetach, "no-detach" ,0, N_("do not detach from the console")},
{ oNoGrab, "no-grab" ,0, N_("do not grab keyboard and mouse")},
{ oClient, "client" ,0, N_("run in client mode for testing")},
{ oLogFile, "log-file" ,2, N_("use a log file for the server")},
{ oShutdown, "shutdown" ,0, N_("shutdown the agent")},
{ oFlush , "flush" ,0, N_("flush the cache")},
{ oBatch , "batch" ,0, N_("run without asking a user")},
{ oPinentryProgram, "pinentry-program", 2 , "Path of PIN Entry program" },
{0}
};
typedef struct {
int used;
char fpr[20];
char *pw;
size_t pwlen;
size_t totlen;
} CACHE_SLOT;
#define MAX_CACHE_ENTRIES 10
#define MAX_CACHE_AGE 1000 /* should fit into an integer */
static volatile int caught_fatal_sig = 0;
static volatile int shut_me_down = 0;
/* static CACHE_SLOT the_cache[MAX_CACHE_ENTRIES]; */
static char *socket_name = NULL;
/* It is possible that we are currently running under setuid permissions */
static int maybe_setuid = 1;
#define buftou32( p ) ((*(byte*)(p) << 24) | (*((byte*)(p)+1)<< 16) | \
(*((byte*)(p)+2) << 8) | (*((byte*)(p)+3)))
#define u32tobuf( p, a ) do { \
((byte*)p)[0] = (byte)((a) >> 24); \
((byte*)p)[1] = (byte)((a) >> 16); \
((byte*)p)[2] = (byte)((a) >> 8); \
((byte*)p)[3] = (byte)((a) ); \
} while(0)
static int start_listening ( const char *name );
static const char *
my_strusage( int level )
{
const char *p;
switch( level ) {
case 11: p = "gpg-agent (GnuPG)";
break;
case 13: p = VERSION; break;
case 17: p = PRINTABLE_OS_NAME; break;
case 19: p =
_("Please report bugs to <bug-gnupg@gnu.org>.\n");
break;
case 1:
case 40: p =
_("Usage: gpg-agent [options] (-h for help)");
break;
case 41: p =
_("Syntax: gpg-agent [options] [command [args]]\n"
"Secret key management for GnuPG\n");
break;
default: p = NULL;
}
return p;
}
static void
i18n_init (void)
{
#ifdef USE_SIMPLE_GETTEXT
set_gettext_file( PACKAGE );
#else
#ifdef ENABLE_NLS
/* gtk_set_locale (); HMMM: We have not yet called gtk_init */
bindtextdomain( PACKAGE, GNUPG_LOCALEDIR );
textdomain( PACKAGE );
#endif
#endif
}
static void
cleanup (void)
{
if (socket_name)
{
char *p = socket_name;
socket_name = NULL;
remove ( p );
gcry_free (p);
}
}
/* Use by gcry for logging */
static void
my_gcry_logger (void *dummy, int level, const char *fmt, va_list arg_ptr)
{
/* translate the log levels */
switch (level)
{
case GCRY_LOG_CONT: level = JNLIB_LOG_CONT; break;
case GCRY_LOG_INFO: level = JNLIB_LOG_INFO; break;
case GCRY_LOG_WARN: level = JNLIB_LOG_WARN; break;
case GCRY_LOG_ERROR:level = JNLIB_LOG_ERROR; break;
case GCRY_LOG_FATAL:level = JNLIB_LOG_FATAL; break;
case GCRY_LOG_BUG: level = JNLIB_LOG_BUG; break;
case GCRY_LOG_DEBUG:level = JNLIB_LOG_DEBUG; break;
default: level = JNLIB_LOG_ERROR; break;
}
log_logv (level, fmt, arg_ptr);
}
static RETSIGTYPE
cleanup_sh (int sig)
{
if (caught_fatal_sig)
raise (sig);
caught_fatal_sig = 1;
shut_me_down = 1;
/* gcry_control( GCRYCTL_TERM_SECMEM );*/
cleanup ();
#ifndef HAVE_DOSISH_SYSTEM
{ /* reset action to default action and raise signal again */
struct sigaction nact;
nact.sa_handler = SIG_DFL;
sigemptyset( &nact.sa_mask );
nact.sa_flags = 0;
sigaction( sig, &nact, NULL);
}
#endif
raise( sig );
}
int
main (int argc, char **argv )
{
ARGPARSE_ARGS pargs;
int orig_argc;
int may_coredump;
char **orig_argv;
FILE *configfp = NULL;
char *configname = NULL;
const char *shell;
unsigned configlineno;
int parse_debug = 0;
int default_config =1;
int greeting = 0;
int nogreeting = 0;
int server_mode = 0;
int client = 0;
int do_shutdown = 0;
int do_flush = 0;
int nodetach = 0;
int grab = 0;
int csh_style = 0;
char *logfile = NULL;
int debug_wait = 0;
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", 1|4);
i18n_init ();
/* check that the libraries are suitable. Do it here because
the option parsing may need services of the library */
if (!gcry_check_version ( "1.1.4" ) )
{
log_fatal( _("libgcrypt is too old (need %s, have %s)\n"),
VERSION, gcry_check_version (NULL) );
}
assuan_set_malloc_hooks (gcry_malloc, gcry_realloc, gcry_free);
gcry_set_log_handler (my_gcry_logger, NULL);
gcry_control (GCRYCTL_USE_SECURE_RNDPOOL);
may_coredump = 0/* FIXME: disable_core_dumps()*/;
shell = getenv ("SHELL");
if (shell && strlen (shell) >= 3 && !strcmp (shell+strlen (shell)-3, "csh") )
csh_style = 1;
opt.homedir = getenv("GNUPGHOME");
if (!opt.homedir || !*opt.homedir)
{
#ifdef HAVE_DRIVE_LETTERS
opt.homedir = "c:/gnupg-test";
#else
opt.homedir = "~/.gnupg-test";
#endif
}
grab = 1;
/* check whether we have a config file on the commandline */
orig_argc = argc;
orig_argv = argv;
pargs.argc = &argc;
pargs.argv = &argv;
pargs.flags= 1|(1<<6); /* do not remove the args, ignore version */
while (arg_parse( &pargs, opts))
{
if (pargs.r_opt == oDebug || pargs.r_opt == oDebugAll)
parse_debug++;
else if (pargs.r_opt == oOptions)
{ /* yes there is one, so we do not try the default one, but
read the option file when it is encountered at the
commandline */
default_config = 0;
}
else if (pargs.r_opt == oNoOptions)
default_config = 0; /* --no-options */
else if (pargs.r_opt == oHomedir)
opt.homedir = pargs.r.ret_str;
}
/* initialize the secure memory. */
gcry_control (GCRYCTL_INIT_SECMEM, 16384, 0);
maybe_setuid = 0;
/*
Now we are now working under our real uid
*/
if (default_config)
configname = make_filename (opt.homedir, "gpg-agent.conf", NULL );
argc = orig_argc;
argv = orig_argv;
pargs.argc = &argc;
pargs.argv = &argv;
pargs.flags= 1; /* do not remove the args */
next_pass:
if (configname)
{
configlineno = 0;
configfp = fopen (configname, "r");
if (!configfp)
{
if (default_config)
{
if( parse_debug )
log_info (_("NOTE: no default option file `%s'\n"),
configname );
}
else
{
log_error (_("option file `%s': %s\n"),
configname, strerror(errno) );
exit(2);
}
xfree (configname);
configname = NULL;
}
if (parse_debug && configname )
log_info (_("reading options from `%s'\n"), configname );
default_config = 0;
}
while (optfile_parse( configfp, configname, &configlineno, &pargs, opts) )
{
switch (pargs.r_opt)
{
case oQuiet: opt.quiet = 1; break;
case oVerbose: opt.verbose++; break;
case oBatch: opt.batch=1; break;
case oDebug: opt.debug |= pargs.r.ret_ulong; break;
case oDebugAll: opt.debug = ~0; break;
case 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 oNoGrab: grab = 0; break;
case oClient: client = 1; break;
case oShutdown: client = 1; do_shutdown = 1; break;
case oFlush: client = 1; do_flush = 1; break;
case oLogFile: logfile = pargs.r.ret_str; break;
case oCsh: csh_style = 1; break;
case oSh: csh_style = 0; break;
case oServer: server_mode = 1; break;
case oPinentryProgram: opt.pinentry_program = pargs.r.ret_str; break;
default : pargs.err = configfp? 1:2; break;
}
}
if (configfp)
{
fclose( configfp );
configfp = NULL;
xfree(configname);
configname = NULL;
goto next_pass;
}
xfree (configname);
configname = NULL;
if (log_get_errorcount(0))
exit(2);
if (nogreeting )
greeting = 0;
if (greeting)
{
fprintf (stderr, "%s %s; %s\n",
strusage(11), strusage(13), strusage(14) );
fprintf (stderr, "%s\n", strusage(15) );
}
#ifdef IS_DEVELOPMENT_VERSION
log_info ("NOTE: this is a development version!\n");
#endif
socket_name = make_filename (opt.homedir, "S.gpg-agent", NULL );
if (strchr ( socket_name, ':') )
{
log_error ("colons are not allowed in the socket name\n");
exit (1);
}
if (client)
{ /* a client for testing this agent */
#if 0 /* FIXME: We are going to use assuan here */
int fd;
struct sockaddr_un client_addr;
size_t len;
char buffer[1000];
int nread;
if ( strlen (socket_name)+1 >= sizeof client_addr.sun_path ) {
log_error ("name of socket to long\n");
exit (1);
}
if( (fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1 )
log_fatal("can't create socket: %s\n", strerror(errno) );
memset( &client_addr, 0, sizeof client_addr );
client_addr.sun_family = AF_UNIX;
strcpy( client_addr.sun_path, socket_name );
len = offsetof (struct sockaddr_un, sun_path)
+ strlen(client_addr.sun_path) + 1;
if( connect( fd, (struct sockaddr*)&client_addr, len ) == -1 ) {
log_error ( "connect() failed: %s\n", strerror (errno) );
exit (1);
}
if ( do_shutdown ) {
u32tobuf (buffer+4, GPGA_PROT_SHUTDOWN );
nread = 4;
}
else if ( do_flush ) {
u32tobuf (buffer+4, GPGA_PROT_FLUSH );
nread = 4;
}
else {
nread = fread ( buffer+4, 1, DIM(buffer)-4, stdin );
if ( opt.verbose )
log_info ( "%d bytes read from stdin\n", nread );
}
u32tobuf (buffer, nread );
writen ( fd, "GPGA\0\0\0\x01", 8 );
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 );
fwrite ( buffer, 1, nread, stdout );
close (fd );
#endif
}
else if (server_mode)
{ /* for now this is the simple pipe based server */
if (logfile)
{
log_set_file (logfile);
log_set_prefix (NULL, 1|2|4);
}
if ( atexit( cleanup ) )
{
log_error ("atexit failed\n");
cleanup ();
exit (1);
}
if (debug_wait)
{
log_debug ("waiting for debugger - my pid is %u .....\n",
(unsigned int)getpid());
sleep (debug_wait);
log_debug ("... okay\n");
}
start_command_handler ();
}
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 (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) )
{
fprintf (stderr, "... 20 seconds to attach the debugger ...");
fflush (stderr);
sleep( 20 ); /* give us some time to attach gdb to the child */
putc ('\n', stderr);
}
if (logfile)
{
log_set_file (logfile);
log_set_prefix (NULL, 1|2|4);
}
if ( atexit( cleanup ) )
{
log_error ("atexit failed\n");
cleanup ();
exit (1);
}
if ( !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;
}
void
agent_exit (int rc)
{
#if 0
#warning no update_random_seed_file
update_random_seed_file();
#endif
#if 0
/* at this time a bit annoying */
if (opt.debug & DBG_MEMSTAT_VALUE)
{
gcry_control( GCRYCTL_DUMP_MEMORY_STATS );
gcry_control( GCRYCTL_DUMP_RANDOM_STATS );
}
if (opt.debug)
gcry_control (GCRYCTL_DUMP_SECMEM_STATS );
#endif
gcry_control (GCRYCTL_TERM_SECMEM );
rc = rc? rc : log_get_errorcount(0)? 2 : 0;
exit (rc);
}
static 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;
}
#if 0
/* 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
}
#endif
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