Line data Source code
1 : /* asshelp.c - Helper functions for Assuan
2 : * Copyright (C) 2002, 2004, 2007, 2009, 2010 Free Software Foundation, Inc.
3 : *
4 : * This file is part of GnuPG.
5 : *
6 : * This file is free software; you can redistribute it and/or modify
7 : * it under the terms of either
8 : *
9 : * - the GNU Lesser General Public License as published by the Free
10 : * Software Foundation; either version 3 of the License, or (at
11 : * your option) any later version.
12 : *
13 : * or
14 : *
15 : * - the GNU General Public License as published by the Free
16 : * Software Foundation; either version 2 of the License, or (at
17 : * your option) any later version.
18 : *
19 : * or both in parallel, as here.
20 : *
21 : * This file is distributed in the hope that it will be useful,
22 : * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 : * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 : * GNU General Public License for more details.
25 : *
26 : * You should have received a copy of the GNU General Public License
27 : * along with this program; if not, see <http://www.gnu.org/licenses/>.
28 : */
29 :
30 : #include <config.h>
31 : #include <stdio.h>
32 : #include <stdlib.h>
33 : #include <string.h>
34 : #include <unistd.h>
35 : #include <errno.h>
36 : #ifdef HAVE_LOCALE_H
37 : #include <locale.h>
38 : #endif
39 :
40 : #include "i18n.h"
41 : #include "util.h"
42 : #include "exechelp.h"
43 : #include "sysutils.h"
44 : #include "status.h"
45 : #include "membuf.h"
46 : #include "asshelp.h"
47 :
48 : /* The type we use for lock_agent_spawning. */
49 : #ifdef HAVE_W32_SYSTEM
50 : # define lock_spawn_t HANDLE
51 : #else
52 : # define lock_spawn_t dotlock_t
53 : #endif
54 :
55 : /* The time we wait until the agent or the dirmngr are ready for
56 : operation after we started them before giving up. */
57 : #ifdef HAVE_W32CE_SYSTEM
58 : # define SECS_TO_WAIT_FOR_AGENT 30
59 : # define SECS_TO_WAIT_FOR_DIRMNGR 30
60 : #else
61 : # define SECS_TO_WAIT_FOR_AGENT 5
62 : # define SECS_TO_WAIT_FOR_DIRMNGR 5
63 : #endif
64 :
65 : /* A bitfield that specifies the assuan categories to log. This is
66 : identical to the default log handler of libassuan. We need to do
67 : it ourselves because we use a custom log handler and want to use
68 : the same assuan variables to select the categories to log. */
69 : static int log_cats;
70 : #define TEST_LOG_CAT(x) (!! (log_cats & (1 << (x - 1))))
71 :
72 : /* The assuan log monitor used to temporary inhibit log messages from
73 : * assuan. */
74 : static int (*my_log_monitor) (assuan_context_t ctx,
75 : unsigned int cat,
76 : const char *msg);
77 :
78 :
79 : static int
80 47107 : my_libassuan_log_handler (assuan_context_t ctx, void *hook,
81 : unsigned int cat, const char *msg)
82 : {
83 : unsigned int dbgval;
84 :
85 47107 : if (! TEST_LOG_CAT (cat))
86 12823 : return 0;
87 :
88 34284 : dbgval = hook? *(unsigned int*)hook : 0;
89 34284 : if (!(dbgval & 1024))
90 34284 : return 0; /* Assuan debugging is not enabled. */
91 :
92 0 : if (ctx && my_log_monitor && !my_log_monitor (ctx, cat, msg))
93 0 : return 0; /* Temporary disabled. */
94 :
95 0 : if (msg)
96 0 : log_string (GPGRT_LOG_DEBUG, msg);
97 :
98 0 : return 1;
99 : }
100 :
101 :
102 : /* Setup libassuan to use our own logging functions. Should be used
103 : early at startup. */
104 : void
105 1754 : setup_libassuan_logging (unsigned int *debug_var_address,
106 : int (*log_monitor)(assuan_context_t ctx,
107 : unsigned int cat,
108 : const char *msg))
109 : {
110 : char *flagstr;
111 :
112 1754 : flagstr = getenv ("ASSUAN_DEBUG");
113 1754 : if (flagstr)
114 0 : log_cats = atoi (flagstr);
115 : else /* Default to log the control channel. */
116 1754 : log_cats = (1 << (ASSUAN_LOG_CONTROL - 1));
117 1754 : my_log_monitor = log_monitor;
118 1754 : assuan_set_log_cb (my_libassuan_log_handler, debug_var_address);
119 1754 : }
120 :
121 :
122 : /* Change the Libassuan log categories to those given by NEWCATS.
123 : NEWCATS is 0 the default category of ASSUAN_LOG_CONTROL is
124 : selected. Note, that setup_libassuan_logging overrides the values
125 : given here. */
126 : void
127 0 : set_libassuan_log_cats (unsigned int newcats)
128 : {
129 0 : if (newcats)
130 0 : log_cats = newcats;
131 : else /* Default to log the control channel. */
132 0 : log_cats = (1 << (ASSUAN_LOG_CONTROL - 1));
133 0 : }
134 :
135 :
136 :
137 : static gpg_error_t
138 1638 : send_one_option (assuan_context_t ctx, gpg_err_source_t errsource,
139 : const char *name, const char *value, int use_putenv)
140 : {
141 : gpg_error_t err;
142 : char *optstr;
143 :
144 : (void)errsource;
145 :
146 1638 : if (!value || !*value)
147 0 : err = 0; /* Avoid sending empty strings. */
148 1638 : else if (asprintf (&optstr, "OPTION %s%s=%s",
149 : use_putenv? "putenv=":"", name, value) < 0)
150 0 : err = gpg_error_from_syserror ();
151 : else
152 : {
153 1638 : err = assuan_transact (ctx, optstr, NULL, NULL, NULL, NULL, NULL, NULL);
154 1638 : xfree (optstr);
155 : }
156 :
157 1638 : return err;
158 : }
159 :
160 :
161 : /* Send the assuan commands pertaining to the pinentry environment. The
162 : OPT_* arguments are optional and may be used to override the
163 : defaults taken from the current locale. */
164 : gpg_error_t
165 527 : send_pinentry_environment (assuan_context_t ctx,
166 : gpg_err_source_t errsource,
167 : const char *opt_lc_ctype,
168 : const char *opt_lc_messages,
169 : session_env_t session_env)
170 :
171 : {
172 527 : gpg_error_t err = 0;
173 : #if defined(HAVE_SETLOCALE)
174 527 : char *old_lc = NULL;
175 : #endif
176 527 : char *dft_lc = NULL;
177 : const char *dft_ttyname;
178 : int iterator;
179 : const char *name, *assname, *value;
180 : int is_default;
181 :
182 527 : iterator = 0;
183 6324 : while ((name = session_env_list_stdenvnames (&iterator, &assname)))
184 : {
185 5270 : value = session_env_getenv_or_default (session_env, name, NULL);
186 5270 : if (!value)
187 3632 : continue;
188 :
189 1638 : if (assname)
190 1111 : err = send_one_option (ctx, errsource, assname, value, 0);
191 : else
192 : {
193 527 : err = send_one_option (ctx, errsource, name, value, 1);
194 527 : if (gpg_err_code (err) == GPG_ERR_UNKNOWN_OPTION)
195 0 : err = 0; /* Server too old; can't pass the new envvars. */
196 : }
197 1638 : if (err)
198 0 : return err;
199 : }
200 :
201 :
202 527 : dft_ttyname = session_env_getenv_or_default (session_env, "GPG_TTY",
203 : &is_default);
204 527 : if (dft_ttyname && !is_default)
205 0 : dft_ttyname = NULL; /* We need the default value. */
206 :
207 : /* Send the value for LC_CTYPE. */
208 : #if defined(HAVE_SETLOCALE) && defined(LC_CTYPE)
209 527 : old_lc = setlocale (LC_CTYPE, NULL);
210 527 : if (old_lc)
211 : {
212 527 : old_lc = xtrystrdup (old_lc);
213 527 : if (!old_lc)
214 0 : return gpg_error_from_syserror ();
215 : }
216 527 : dft_lc = setlocale (LC_CTYPE, "");
217 : #endif
218 527 : if (opt_lc_ctype || (dft_ttyname && dft_lc))
219 : {
220 0 : err = send_one_option (ctx, errsource, "lc-ctype",
221 : opt_lc_ctype ? opt_lc_ctype : dft_lc, 0);
222 : }
223 : #if defined(HAVE_SETLOCALE) && defined(LC_CTYPE)
224 527 : if (old_lc)
225 : {
226 527 : setlocale (LC_CTYPE, old_lc);
227 527 : xfree (old_lc);
228 : }
229 : #endif
230 527 : if (err)
231 0 : return err;
232 :
233 : /* Send the value for LC_MESSAGES. */
234 : #if defined(HAVE_SETLOCALE) && defined(LC_MESSAGES)
235 527 : old_lc = setlocale (LC_MESSAGES, NULL);
236 527 : if (old_lc)
237 : {
238 527 : old_lc = xtrystrdup (old_lc);
239 527 : if (!old_lc)
240 0 : return gpg_error_from_syserror ();
241 : }
242 527 : dft_lc = setlocale (LC_MESSAGES, "");
243 : #endif
244 527 : if (opt_lc_messages || (dft_ttyname && dft_lc))
245 : {
246 0 : err = send_one_option (ctx, errsource, "lc-messages",
247 : opt_lc_messages ? opt_lc_messages : dft_lc, 0);
248 : }
249 : #if defined(HAVE_SETLOCALE) && defined(LC_MESSAGES)
250 527 : if (old_lc)
251 : {
252 527 : setlocale (LC_MESSAGES, old_lc);
253 527 : xfree (old_lc);
254 : }
255 : #endif
256 527 : if (err)
257 0 : return err;
258 :
259 527 : return 0;
260 : }
261 :
262 :
263 : /* Lock a spawning process. The caller needs to provide the address
264 : of a variable to store the lock information and the name or the
265 : process. */
266 : static gpg_error_t
267 48 : lock_spawning (lock_spawn_t *lock, const char *homedir, const char *name,
268 : int verbose)
269 : {
270 : #ifdef HAVE_W32_SYSTEM
271 : int waitrc;
272 : int timeout = (!strcmp (name, "agent")
273 : ? SECS_TO_WAIT_FOR_AGENT
274 : : SECS_TO_WAIT_FOR_DIRMNGR);
275 :
276 : (void)homedir; /* Not required. */
277 :
278 : *lock = CreateMutexW
279 : (NULL, FALSE,
280 : !strcmp (name, "agent")? L"spawn_"GNUPG_NAME"_agent_sentinel":
281 : !strcmp (name, "dirmngr")? L"spawn_"GNUPG_NAME"_dirmngr_sentinel":
282 : /* */ L"spawn_"GNUPG_NAME"_unknown_sentinel");
283 : if (!*lock)
284 : {
285 : log_error ("failed to create the spawn_%s mutex: %s\n",
286 : name, w32_strerror (-1));
287 : return gpg_error (GPG_ERR_GENERAL);
288 : }
289 :
290 : retry:
291 : waitrc = WaitForSingleObject (*lock, 1000);
292 : if (waitrc == WAIT_OBJECT_0)
293 : return 0;
294 :
295 : if (waitrc == WAIT_TIMEOUT && timeout)
296 : {
297 : timeout--;
298 : if (verbose)
299 : log_info ("another process is trying to start the %s ... (%ds)\n",
300 : name, timeout);
301 : goto retry;
302 : }
303 : if (waitrc == WAIT_TIMEOUT)
304 : log_info ("error waiting for the spawn_%s mutex: timeout\n", name);
305 : else
306 : log_info ("error waiting for the spawn_%s mutex: (code=%d) %s\n",
307 : name, waitrc, w32_strerror (-1));
308 : return gpg_error (GPG_ERR_GENERAL);
309 : #else /*!HAVE_W32_SYSTEM*/
310 : char *fname;
311 :
312 : (void)verbose;
313 :
314 48 : *lock = NULL;
315 :
316 48 : fname = make_absfilename_try
317 : (homedir,
318 48 : !strcmp (name, "agent")? "gnupg_spawn_agent_sentinel":
319 0 : !strcmp (name, "dirmngr")? "gnupg_spawn_dirmngr_sentinel":
320 : /* */ "gnupg_spawn_unknown_sentinel",
321 : NULL);
322 48 : if (!fname)
323 0 : return gpg_error_from_syserror ();
324 :
325 48 : *lock = dotlock_create (fname, 0);
326 48 : xfree (fname);
327 48 : if (!*lock)
328 0 : return gpg_error_from_syserror ();
329 :
330 : /* FIXME: We should use a timeout of 5000 here - however
331 : make_dotlock does not yet support values other than -1 and 0. */
332 48 : if (dotlock_take (*lock, -1))
333 0 : return gpg_error_from_syserror ();
334 :
335 48 : return 0;
336 : #endif /*!HAVE_W32_SYSTEM*/
337 : }
338 :
339 :
340 : /* Unlock the spawning process. */
341 : static void
342 48 : unlock_spawning (lock_spawn_t *lock, const char *name)
343 : {
344 48 : if (*lock)
345 : {
346 : #ifdef HAVE_W32_SYSTEM
347 : if (!ReleaseMutex (*lock))
348 : log_error ("failed to release the spawn_%s mutex: %s\n",
349 : name, w32_strerror (-1));
350 : CloseHandle (*lock);
351 : #else /*!HAVE_W32_SYSTEM*/
352 : (void)name;
353 48 : dotlock_destroy (*lock);
354 : #endif /*!HAVE_W32_SYSTEM*/
355 48 : *lock = NULL;
356 : }
357 48 : }
358 :
359 : /* Try to connect to the agent via socket or start it if it is not
360 : running and AUTOSTART is set. Handle the server's initial
361 : greeting. Returns a new assuan context at R_CTX or an error
362 : code. */
363 : gpg_error_t
364 527 : start_new_gpg_agent (assuan_context_t *r_ctx,
365 : gpg_err_source_t errsource,
366 : const char *agent_program,
367 : const char *opt_lc_ctype,
368 : const char *opt_lc_messages,
369 : session_env_t session_env,
370 : int autostart, int verbose, int debug,
371 : gpg_error_t (*status_cb)(ctrl_t, int, ...),
372 : ctrl_t status_cb_arg)
373 : {
374 : gpg_error_t err;
375 : assuan_context_t ctx;
376 527 : int did_success_msg = 0;
377 : char *sockname;
378 : const char *argv[6];
379 :
380 527 : *r_ctx = NULL;
381 :
382 527 : err = assuan_new (&ctx);
383 527 : if (err)
384 : {
385 0 : log_error ("error allocating assuan context: %s\n", gpg_strerror (err));
386 0 : return err;
387 : }
388 :
389 527 : sockname = make_filename_try (gnupg_socketdir (), GPG_AGENT_SOCK_NAME, NULL);
390 527 : if (!sockname)
391 : {
392 0 : err = gpg_err_make (errsource, gpg_err_code_from_syserror ());
393 0 : assuan_release (ctx);
394 0 : return err;
395 : }
396 :
397 527 : err = assuan_socket_connect (ctx, sockname, 0, 0);
398 527 : if (err && autostart)
399 : {
400 : char *abs_homedir;
401 : lock_spawn_t lock;
402 48 : char *program = NULL;
403 48 : const char *program_arg = NULL;
404 : char *p;
405 : const char *s;
406 : int i;
407 :
408 : /* With no success start a new server. */
409 48 : if (!agent_program || !*agent_program)
410 0 : agent_program = gnupg_module_name (GNUPG_MODULE_NAME_AGENT);
411 48 : else if ((s=strchr (agent_program, '|')) && s[1] == '-' && s[2]=='-')
412 : {
413 : /* Hack to insert an additional option on the command line. */
414 48 : program = xtrystrdup (agent_program);
415 48 : if (!program)
416 : {
417 0 : gpg_error_t tmperr = gpg_err_make (errsource,
418 : gpg_err_code_from_syserror ());
419 0 : xfree (sockname);
420 0 : assuan_release (ctx);
421 0 : return tmperr;
422 : }
423 48 : p = strchr (program, '|');
424 48 : *p++ = 0;
425 48 : program_arg = p;
426 : }
427 :
428 48 : if (verbose)
429 41 : log_info (_("no running gpg-agent - starting '%s'\n"),
430 : agent_program);
431 :
432 48 : if (status_cb)
433 0 : status_cb (status_cb_arg, STATUS_PROGRESS,
434 : "starting_agent ? 0 0", NULL);
435 :
436 : /* We better pass an absolute home directory to the agent just
437 : in case gpg-agent does not convert the passed name to an
438 : absolute one (which it should do). */
439 48 : abs_homedir = make_absfilename_try (gnupg_homedir (), NULL);
440 48 : if (!abs_homedir)
441 : {
442 0 : gpg_error_t tmperr = gpg_err_make (errsource,
443 : gpg_err_code_from_syserror ());
444 0 : log_error ("error building filename: %s\n",gpg_strerror (tmperr));
445 0 : xfree (sockname);
446 0 : assuan_release (ctx);
447 0 : xfree (program);
448 0 : return tmperr;
449 : }
450 :
451 48 : if (fflush (NULL))
452 : {
453 0 : gpg_error_t tmperr = gpg_err_make (errsource,
454 : gpg_err_code_from_syserror ());
455 0 : log_error ("error flushing pending output: %s\n",
456 0 : strerror (errno));
457 0 : xfree (sockname);
458 0 : assuan_release (ctx);
459 0 : xfree (abs_homedir);
460 0 : xfree (program);
461 0 : return tmperr;
462 : }
463 :
464 : /* If the agent has been configured for use with a standard
465 : socket, an environment variable is not required and thus
466 : we we can savely start the agent here. */
467 48 : i = 0;
468 48 : argv[i++] = "--homedir";
469 48 : argv[i++] = abs_homedir;
470 48 : argv[i++] = "--use-standard-socket";
471 48 : if (program_arg)
472 48 : argv[i++] = program_arg;
473 48 : argv[i++] = "--daemon";
474 48 : argv[i++] = NULL;
475 :
476 48 : if (!(err = lock_spawning (&lock, gnupg_homedir (), "agent", verbose))
477 48 : && assuan_socket_connect (ctx, sockname, 0, 0))
478 : {
479 48 : err = gnupg_spawn_process_detached (program? program : agent_program,
480 : argv, NULL);
481 48 : if (err)
482 0 : log_error ("failed to start agent '%s': %s\n",
483 : agent_program, gpg_strerror (err));
484 : else
485 : {
486 48 : for (i=0; i < SECS_TO_WAIT_FOR_AGENT; i++)
487 : {
488 48 : if (verbose)
489 41 : log_info (_("waiting for the agent to come up ... (%ds)\n"),
490 : SECS_TO_WAIT_FOR_AGENT - i);
491 48 : gnupg_sleep (1);
492 48 : err = assuan_socket_connect (ctx, sockname, 0, 0);
493 48 : if (!err)
494 : {
495 48 : if (verbose)
496 : {
497 41 : log_info (_("connection to agent established\n"));
498 41 : did_success_msg = 1;
499 : }
500 48 : break;
501 : }
502 : }
503 : }
504 : }
505 :
506 48 : unlock_spawning (&lock, "agent");
507 48 : xfree (abs_homedir);
508 48 : xfree (program);
509 : }
510 527 : xfree (sockname);
511 527 : if (err)
512 : {
513 0 : if (autostart || gpg_err_code (err) != GPG_ERR_ASS_CONNECT_FAILED)
514 0 : log_error ("can't connect to the agent: %s\n", gpg_strerror (err));
515 0 : assuan_release (ctx);
516 0 : return gpg_err_make (errsource, GPG_ERR_NO_AGENT);
517 : }
518 :
519 527 : if (debug && !did_success_msg)
520 0 : log_debug ("connection to agent established\n");
521 :
522 527 : err = assuan_transact (ctx, "RESET",
523 : NULL, NULL, NULL, NULL, NULL, NULL);
524 527 : if (!err)
525 : {
526 527 : err = send_pinentry_environment (ctx, errsource,
527 : opt_lc_ctype, opt_lc_messages,
528 : session_env);
529 527 : if (gpg_err_code (err) == GPG_ERR_FORBIDDEN
530 0 : && gpg_err_source (err) == GPG_ERR_SOURCE_GPGAGENT)
531 : {
532 : /* Check whether we are in restricted mode. */
533 0 : if (!assuan_transact (ctx, "GETINFO restricted",
534 : NULL, NULL, NULL, NULL, NULL, NULL))
535 : {
536 0 : if (verbose)
537 0 : log_info (_("connection to agent is in restricted mode\n"));
538 0 : err = 0;
539 : }
540 : }
541 : }
542 527 : if (err)
543 : {
544 0 : assuan_release (ctx);
545 0 : return err;
546 : }
547 :
548 527 : *r_ctx = ctx;
549 527 : return 0;
550 : }
551 :
552 :
553 : /* Try to connect to the dirmngr via a socket. On platforms
554 : supporting it, start it up if needed and if AUTOSTART is true.
555 : Returns a new assuan context at R_CTX or an error code. */
556 : gpg_error_t
557 0 : start_new_dirmngr (assuan_context_t *r_ctx,
558 : gpg_err_source_t errsource,
559 : const char *dirmngr_program,
560 : int autostart,
561 : int verbose, int debug,
562 : gpg_error_t (*status_cb)(ctrl_t, int, ...),
563 : ctrl_t status_cb_arg)
564 : {
565 : gpg_error_t err;
566 : assuan_context_t ctx;
567 : const char *sockname;
568 0 : int did_success_msg = 0;
569 :
570 0 : *r_ctx = NULL;
571 :
572 0 : err = assuan_new (&ctx);
573 0 : if (err)
574 : {
575 0 : log_error ("error allocating assuan context: %s\n", gpg_strerror (err));
576 0 : return err;
577 : }
578 :
579 0 : sockname = dirmngr_socket_name ();
580 0 : err = assuan_socket_connect (ctx, sockname, 0, 0);
581 :
582 : #ifdef USE_DIRMNGR_AUTO_START
583 0 : if (err && autostart)
584 : {
585 : lock_spawn_t lock;
586 : const char *argv[4];
587 : char *abs_homedir;
588 :
589 : /* No connection: Try start a new Dirmngr. */
590 0 : if (!dirmngr_program || !*dirmngr_program)
591 0 : dirmngr_program = gnupg_module_name (GNUPG_MODULE_NAME_DIRMNGR);
592 :
593 0 : if (verbose)
594 0 : log_info (_("no running Dirmngr - starting '%s'\n"),
595 : dirmngr_program);
596 :
597 0 : if (status_cb)
598 0 : status_cb (status_cb_arg, STATUS_PROGRESS,
599 : "starting_dirmngr ? 0 0", NULL);
600 :
601 0 : abs_homedir = make_absfilename (gnupg_homedir (), NULL);
602 0 : if (!abs_homedir)
603 : {
604 0 : gpg_error_t tmperr = gpg_err_make (errsource,
605 : gpg_err_code_from_syserror ());
606 0 : log_error ("error building filename: %s\n",gpg_strerror (tmperr));
607 0 : assuan_release (ctx);
608 0 : return tmperr;
609 : }
610 :
611 0 : if (fflush (NULL))
612 : {
613 0 : gpg_error_t tmperr = gpg_err_make (errsource,
614 : gpg_err_code_from_syserror ());
615 0 : log_error ("error flushing pending output: %s\n",
616 0 : strerror (errno));
617 0 : assuan_release (ctx);
618 0 : return tmperr;
619 : }
620 :
621 0 : argv[0] = "--daemon";
622 : /* Try starting the daemon. Versions of dirmngr < 2.1.15 do
623 : * this only if the home directory is given on the command line. */
624 0 : argv[1] = "--homedir";
625 0 : argv[2] = abs_homedir;
626 0 : argv[3] = NULL;
627 :
628 0 : if (!(err = lock_spawning (&lock, gnupg_homedir (), "dirmngr", verbose))
629 0 : && assuan_socket_connect (ctx, sockname, 0, 0))
630 : {
631 0 : err = gnupg_spawn_process_detached (dirmngr_program, argv, NULL);
632 0 : if (err)
633 0 : log_error ("failed to start the dirmngr '%s': %s\n",
634 : dirmngr_program, gpg_strerror (err));
635 : else
636 : {
637 : int i;
638 :
639 0 : for (i=0; i < SECS_TO_WAIT_FOR_DIRMNGR; i++)
640 : {
641 0 : if (verbose)
642 0 : log_info (_("waiting for the dirmngr "
643 : "to come up ... (%ds)\n"),
644 : SECS_TO_WAIT_FOR_DIRMNGR - i);
645 0 : gnupg_sleep (1);
646 0 : err = assuan_socket_connect (ctx, sockname, 0, 0);
647 0 : if (!err)
648 : {
649 0 : if (verbose)
650 : {
651 0 : log_info (_("connection to the dirmngr"
652 : " established\n"));
653 0 : did_success_msg = 1;
654 : }
655 0 : break;
656 : }
657 : }
658 : }
659 : }
660 :
661 0 : unlock_spawning (&lock, "dirmngr");
662 0 : xfree (abs_homedir);
663 : }
664 : #else
665 : (void)dirmngr_program;
666 : (void)verbose;
667 : (void)status_cb;
668 : (void)status_cb_arg;
669 : #endif /*USE_DIRMNGR_AUTO_START*/
670 :
671 0 : if (err)
672 : {
673 0 : if (autostart || gpg_err_code (err) != GPG_ERR_ASS_CONNECT_FAILED)
674 0 : log_error ("connecting dirmngr at '%s' failed: %s\n",
675 : sockname, gpg_strerror (err));
676 0 : assuan_release (ctx);
677 0 : return gpg_err_make (errsource, GPG_ERR_NO_DIRMNGR);
678 : }
679 :
680 0 : if (debug && !did_success_msg)
681 0 : log_debug ("connection to the dirmngr established\n");
682 :
683 0 : *r_ctx = ctx;
684 0 : return 0;
685 : }
686 :
687 :
688 : /* Return the version of a server using "GETINFO version". On success
689 : 0 is returned and R_VERSION receives a malloced string with the
690 : version which must be freed by the caller. On error NULL is stored
691 : at R_VERSION and an error code returned. Mode is in general 0 but
692 : certian values may be used to modify the used version command:
693 :
694 : MODE == 0 = Use "GETINFO version"
695 : MODE == 2 - Use "SCD GETINFO version"
696 : */
697 : gpg_error_t
698 446 : get_assuan_server_version (assuan_context_t ctx, int mode, char **r_version)
699 : {
700 : gpg_error_t err;
701 : membuf_t data;
702 :
703 446 : init_membuf (&data, 64);
704 446 : err = assuan_transact (ctx,
705 : mode == 2? "SCD GETINFO version"
706 : /**/ : "GETINFO version",
707 : put_membuf_cb, &data,
708 : NULL, NULL, NULL, NULL);
709 446 : if (err)
710 : {
711 0 : xfree (get_membuf (&data, NULL));
712 0 : *r_version = NULL;
713 : }
714 : else
715 : {
716 446 : put_membuf (&data, "", 1);
717 446 : *r_version = get_membuf (&data, NULL);
718 446 : if (!*r_version)
719 0 : err = gpg_error_from_syserror ();
720 : }
721 446 : return err;
722 : }
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