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![Werner Koch](/assets/img/avatar_default.png)
* common/asshelp.c (wait_for_sock): Round SECSLEFT. * dirmngr/dirmngr.c (main): Take care of --debug-wait also in dameon mode. * common/sysutils.c (gnupg_usleep) [HAVE_NANOSLEEP]: Fix nanosleep use. -- Without the rounding we saw in verbose mose [...]to come up ... (5s) [...]to come up ... (4s) immediately without the expected one second delay. Waiting for the next seconds did not work if nanosleep was used due to improper passed parameters in gnupg_usleep. Adding --debug-wait for dirmngr in daemon mode is required to test this change. GnuPG-bug-id: 3490 Signed-off-by: Werner Koch <wk@gnupg.org> (cherry picked from commit0cfdd3b57d
) Fixes-commit:1189df2cd7
Signed-off-by: Werner Koch <wk@gnupg.org>
686 lines
20 KiB
C
686 lines
20 KiB
C
/* asshelp.c - Helper functions for Assuan
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* Copyright (C) 2002, 2004, 2007, 2009, 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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* This file is free software; you can redistribute it and/or modify
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* it under the terms of either
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*
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* - the GNU Lesser General Public License as published by the Free
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* Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* or
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*
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* - the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* or both in parallel, as here.
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*
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* This file 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 <https://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 <string.h>
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#include <unistd.h>
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#include <errno.h>
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#ifdef HAVE_LOCALE_H
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#include <locale.h>
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#endif
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#include "i18n.h"
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#include "util.h"
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#include "exechelp.h"
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#include "sysutils.h"
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#include "status.h"
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#include "membuf.h"
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#include "asshelp.h"
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/* The type we use for lock_agent_spawning. */
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#ifdef HAVE_W32_SYSTEM
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# define lock_spawn_t HANDLE
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#else
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# define lock_spawn_t dotlock_t
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#endif
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/* The time we wait until the agent or the dirmngr are ready for
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operation after we started them before giving up. */
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#ifdef HAVE_W32CE_SYSTEM
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# define SECS_TO_WAIT_FOR_AGENT 30
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# define SECS_TO_WAIT_FOR_DIRMNGR 30
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#else
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# define SECS_TO_WAIT_FOR_AGENT 5
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# define SECS_TO_WAIT_FOR_DIRMNGR 5
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#endif
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/* A bitfield that specifies the assuan categories to log. This is
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identical to the default log handler of libassuan. We need to do
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it ourselves because we use a custom log handler and want to use
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the same assuan variables to select the categories to log. */
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static int log_cats;
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#define TEST_LOG_CAT(x) (!! (log_cats & (1 << (x - 1))))
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/* The assuan log monitor used to temporary inhibit log messages from
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* assuan. */
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static int (*my_log_monitor) (assuan_context_t ctx,
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unsigned int cat,
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const char *msg);
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static int
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my_libassuan_log_handler (assuan_context_t ctx, void *hook,
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unsigned int cat, const char *msg)
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{
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unsigned int dbgval;
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if (! TEST_LOG_CAT (cat))
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return 0;
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dbgval = hook? *(unsigned int*)hook : 0;
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if (!(dbgval & 1024))
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return 0; /* Assuan debugging is not enabled. */
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if (ctx && my_log_monitor && !my_log_monitor (ctx, cat, msg))
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return 0; /* Temporary disabled. */
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if (msg)
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log_string (GPGRT_LOG_DEBUG, msg);
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return 1;
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}
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/* Setup libassuan to use our own logging functions. Should be used
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early at startup. */
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void
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setup_libassuan_logging (unsigned int *debug_var_address,
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int (*log_monitor)(assuan_context_t ctx,
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unsigned int cat,
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const char *msg))
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{
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char *flagstr;
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flagstr = getenv ("ASSUAN_DEBUG");
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if (flagstr)
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log_cats = atoi (flagstr);
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else /* Default to log the control channel. */
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log_cats = (1 << (ASSUAN_LOG_CONTROL - 1));
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my_log_monitor = log_monitor;
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assuan_set_log_cb (my_libassuan_log_handler, debug_var_address);
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}
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/* Change the Libassuan log categories to those given by NEWCATS.
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NEWCATS is 0 the default category of ASSUAN_LOG_CONTROL is
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selected. Note, that setup_libassuan_logging overrides the values
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given here. */
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void
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set_libassuan_log_cats (unsigned int newcats)
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{
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if (newcats)
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log_cats = newcats;
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else /* Default to log the control channel. */
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log_cats = (1 << (ASSUAN_LOG_CONTROL - 1));
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}
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static gpg_error_t
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send_one_option (assuan_context_t ctx, gpg_err_source_t errsource,
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const char *name, const char *value, int use_putenv)
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{
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gpg_error_t err;
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char *optstr;
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(void)errsource;
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if (!value || !*value)
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err = 0; /* Avoid sending empty strings. */
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else if (asprintf (&optstr, "OPTION %s%s=%s",
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use_putenv? "putenv=":"", name, value) < 0)
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err = gpg_error_from_syserror ();
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else
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{
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err = assuan_transact (ctx, optstr, NULL, NULL, NULL, NULL, NULL, NULL);
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xfree (optstr);
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}
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return err;
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}
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/* Send the assuan commands pertaining to the pinentry environment. The
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OPT_* arguments are optional and may be used to override the
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defaults taken from the current locale. */
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gpg_error_t
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send_pinentry_environment (assuan_context_t ctx,
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gpg_err_source_t errsource,
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const char *opt_lc_ctype,
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const char *opt_lc_messages,
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session_env_t session_env)
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{
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gpg_error_t err = 0;
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#if defined(HAVE_SETLOCALE)
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char *old_lc = NULL;
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#endif
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char *dft_lc = NULL;
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const char *dft_ttyname;
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int iterator;
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const char *name, *assname, *value;
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int is_default;
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iterator = 0;
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while ((name = session_env_list_stdenvnames (&iterator, &assname)))
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{
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value = session_env_getenv_or_default (session_env, name, NULL);
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if (!value)
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continue;
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if (assname)
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err = send_one_option (ctx, errsource, assname, value, 0);
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else
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{
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err = send_one_option (ctx, errsource, name, value, 1);
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if (gpg_err_code (err) == GPG_ERR_UNKNOWN_OPTION)
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err = 0; /* Server too old; can't pass the new envvars. */
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}
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if (err)
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return err;
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}
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dft_ttyname = session_env_getenv_or_default (session_env, "GPG_TTY",
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&is_default);
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if (dft_ttyname && !is_default)
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dft_ttyname = NULL; /* We need the default value. */
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/* Send the value for LC_CTYPE. */
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#if defined(HAVE_SETLOCALE) && defined(LC_CTYPE)
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old_lc = setlocale (LC_CTYPE, NULL);
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if (old_lc)
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{
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old_lc = xtrystrdup (old_lc);
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if (!old_lc)
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return gpg_error_from_syserror ();
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}
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dft_lc = setlocale (LC_CTYPE, "");
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#endif
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if (opt_lc_ctype || (dft_ttyname && dft_lc))
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{
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err = send_one_option (ctx, errsource, "lc-ctype",
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opt_lc_ctype ? opt_lc_ctype : dft_lc, 0);
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}
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#if defined(HAVE_SETLOCALE) && defined(LC_CTYPE)
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if (old_lc)
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{
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setlocale (LC_CTYPE, old_lc);
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xfree (old_lc);
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}
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#endif
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if (err)
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return err;
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/* Send the value for LC_MESSAGES. */
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#if defined(HAVE_SETLOCALE) && defined(LC_MESSAGES)
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old_lc = setlocale (LC_MESSAGES, NULL);
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if (old_lc)
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{
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old_lc = xtrystrdup (old_lc);
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if (!old_lc)
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return gpg_error_from_syserror ();
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}
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dft_lc = setlocale (LC_MESSAGES, "");
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#endif
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if (opt_lc_messages || (dft_ttyname && dft_lc))
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{
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err = send_one_option (ctx, errsource, "lc-messages",
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opt_lc_messages ? opt_lc_messages : dft_lc, 0);
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}
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#if defined(HAVE_SETLOCALE) && defined(LC_MESSAGES)
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if (old_lc)
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{
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setlocale (LC_MESSAGES, old_lc);
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xfree (old_lc);
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}
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#endif
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if (err)
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return err;
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return 0;
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}
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/* Lock a spawning process. The caller needs to provide the address
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of a variable to store the lock information and the name or the
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process. */
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static gpg_error_t
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lock_spawning (lock_spawn_t *lock, const char *homedir, const char *name,
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int verbose)
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{
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char *fname;
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(void)verbose;
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*lock = NULL;
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fname = make_absfilename_try
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(homedir,
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!strcmp (name, "agent")? "gnupg_spawn_agent_sentinel":
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!strcmp (name, "dirmngr")? "gnupg_spawn_dirmngr_sentinel":
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/* */ "gnupg_spawn_unknown_sentinel",
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NULL);
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if (!fname)
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return gpg_error_from_syserror ();
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*lock = dotlock_create (fname, 0);
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xfree (fname);
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if (!*lock)
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return gpg_error_from_syserror ();
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/* FIXME: We should use a timeout of 5000 here - however
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make_dotlock does not yet support values other than -1 and 0. */
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if (dotlock_take (*lock, -1))
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return gpg_error_from_syserror ();
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return 0;
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}
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/* Unlock the spawning process. */
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static void
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unlock_spawning (lock_spawn_t *lock, const char *name)
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{
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if (*lock)
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{
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(void)name;
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dotlock_destroy (*lock);
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*lock = NULL;
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}
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}
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static gpg_error_t
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wait_for_sock (int secs, const char *name, const char *sockname, int verbose, assuan_context_t ctx, int *did_success_msg)
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{
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gpg_error_t err = 0;
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int target_us = secs * 1000000;
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int elapsed_us = 0;
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/*
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* 977us * 1024 = just a little more than 1s.
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* so we will double this timeout 10 times in the first
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* second, and then switch over to 1s checkins.
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*/
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int next_sleep_us = 977;
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int lastalert = secs+1;
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int secsleft;
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while (elapsed_us < target_us)
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{
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if (verbose)
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{
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secsleft = (target_us - elapsed_us + 999999)/1000000;
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/* log_clock ("left=%d last=%d targ=%d elap=%d next=%d\n", */
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/* secsleft, lastalert, target_us, elapsed_us, */
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/* next_sleep_us); */
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if (secsleft < lastalert)
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{
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log_info (_("waiting for the %s to come up ... (%ds)\n"),
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name, secsleft);
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lastalert = secsleft;
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}
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}
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gnupg_usleep (next_sleep_us);
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elapsed_us += next_sleep_us;
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err = assuan_socket_connect (ctx, sockname, 0, 0);
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if (!err)
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{
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if (verbose)
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{
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log_info (_("connection to %s established\n"),
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name);
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*did_success_msg = 1;
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}
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break;
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}
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next_sleep_us *= 2;
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if (next_sleep_us > 1000000)
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next_sleep_us = 1000000;
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}
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return err;
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}
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/* Try to connect to the agent via socket or start it if it is not
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running and AUTOSTART is set. Handle the server's initial
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greeting. Returns a new assuan context at R_CTX or an error
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code. */
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gpg_error_t
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start_new_gpg_agent (assuan_context_t *r_ctx,
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gpg_err_source_t errsource,
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const char *agent_program,
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const char *opt_lc_ctype,
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const char *opt_lc_messages,
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session_env_t session_env,
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int autostart, int verbose, int debug,
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gpg_error_t (*status_cb)(ctrl_t, int, ...),
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ctrl_t status_cb_arg)
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{
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gpg_error_t err;
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assuan_context_t ctx;
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int did_success_msg = 0;
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char *sockname;
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const char *argv[6];
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*r_ctx = NULL;
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err = assuan_new (&ctx);
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if (err)
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{
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log_error ("error allocating assuan context: %s\n", gpg_strerror (err));
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return err;
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}
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sockname = make_filename_try (gnupg_socketdir (), GPG_AGENT_SOCK_NAME, NULL);
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if (!sockname)
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{
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err = gpg_err_make (errsource, gpg_err_code_from_syserror ());
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assuan_release (ctx);
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return err;
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}
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err = assuan_socket_connect (ctx, sockname, 0, 0);
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if (err && autostart)
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{
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char *abs_homedir;
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lock_spawn_t lock;
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char *program = NULL;
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const char *program_arg = NULL;
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char *p;
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const char *s;
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int i;
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/* With no success start a new server. */
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if (!agent_program || !*agent_program)
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agent_program = gnupg_module_name (GNUPG_MODULE_NAME_AGENT);
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else if ((s=strchr (agent_program, '|')) && s[1] == '-' && s[2]=='-')
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{
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/* Hack to insert an additional option on the command line. */
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program = xtrystrdup (agent_program);
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if (!program)
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{
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gpg_error_t tmperr = gpg_err_make (errsource,
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gpg_err_code_from_syserror ());
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xfree (sockname);
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assuan_release (ctx);
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return tmperr;
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}
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p = strchr (program, '|');
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*p++ = 0;
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program_arg = p;
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}
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if (verbose)
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log_info (_("no running gpg-agent - starting '%s'\n"),
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agent_program);
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if (status_cb)
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status_cb (status_cb_arg, STATUS_PROGRESS,
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"starting_agent ? 0 0", NULL);
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/* We better pass an absolute home directory to the agent just
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in case gpg-agent does not convert the passed name to an
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absolute one (which it should do). */
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abs_homedir = make_absfilename_try (gnupg_homedir (), NULL);
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if (!abs_homedir)
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{
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gpg_error_t tmperr = gpg_err_make (errsource,
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gpg_err_code_from_syserror ());
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log_error ("error building filename: %s\n",gpg_strerror (tmperr));
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xfree (sockname);
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assuan_release (ctx);
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xfree (program);
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return tmperr;
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}
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if (fflush (NULL))
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{
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gpg_error_t tmperr = gpg_err_make (errsource,
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gpg_err_code_from_syserror ());
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log_error ("error flushing pending output: %s\n",
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strerror (errno));
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xfree (sockname);
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assuan_release (ctx);
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xfree (abs_homedir);
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xfree (program);
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return tmperr;
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}
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/* If the agent has been configured for use with a standard
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socket, an environment variable is not required and thus
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we can safely start the agent here. */
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i = 0;
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argv[i++] = "--homedir";
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argv[i++] = abs_homedir;
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argv[i++] = "--use-standard-socket";
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if (program_arg)
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argv[i++] = program_arg;
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argv[i++] = "--daemon";
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argv[i++] = NULL;
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if (!(err = lock_spawning (&lock, gnupg_homedir (), "agent", verbose))
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&& assuan_socket_connect (ctx, sockname, 0, 0))
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{
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err = gnupg_spawn_process_detached (program? program : agent_program,
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argv, NULL);
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if (err)
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log_error ("failed to start agent '%s': %s\n",
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agent_program, gpg_strerror (err));
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else
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err = wait_for_sock (SECS_TO_WAIT_FOR_AGENT, "agent",
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sockname, verbose, ctx, &did_success_msg);
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}
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unlock_spawning (&lock, "agent");
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xfree (abs_homedir);
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xfree (program);
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}
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xfree (sockname);
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if (err)
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{
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if (autostart || gpg_err_code (err) != GPG_ERR_ASS_CONNECT_FAILED)
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log_error ("can't connect to the agent: %s\n", gpg_strerror (err));
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assuan_release (ctx);
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return gpg_err_make (errsource, GPG_ERR_NO_AGENT);
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}
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if (debug && !did_success_msg)
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log_debug ("connection to agent established\n");
|
|
|
|
err = assuan_transact (ctx, "RESET",
|
|
NULL, NULL, NULL, NULL, NULL, NULL);
|
|
if (!err)
|
|
{
|
|
err = send_pinentry_environment (ctx, errsource,
|
|
opt_lc_ctype, opt_lc_messages,
|
|
session_env);
|
|
if (gpg_err_code (err) == GPG_ERR_FORBIDDEN
|
|
&& gpg_err_source (err) == GPG_ERR_SOURCE_GPGAGENT)
|
|
{
|
|
/* Check whether we are in restricted mode. */
|
|
if (!assuan_transact (ctx, "GETINFO restricted",
|
|
NULL, NULL, NULL, NULL, NULL, NULL))
|
|
{
|
|
if (verbose)
|
|
log_info (_("connection to agent is in restricted mode\n"));
|
|
err = 0;
|
|
}
|
|
}
|
|
}
|
|
if (err)
|
|
{
|
|
assuan_release (ctx);
|
|
return err;
|
|
}
|
|
|
|
*r_ctx = ctx;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Try to connect to the dirmngr via a socket. On platforms
|
|
supporting it, start it up if needed and if AUTOSTART is true.
|
|
Returns a new assuan context at R_CTX or an error code. */
|
|
gpg_error_t
|
|
start_new_dirmngr (assuan_context_t *r_ctx,
|
|
gpg_err_source_t errsource,
|
|
const char *dirmngr_program,
|
|
int autostart,
|
|
int verbose, int debug,
|
|
gpg_error_t (*status_cb)(ctrl_t, int, ...),
|
|
ctrl_t status_cb_arg)
|
|
{
|
|
gpg_error_t err;
|
|
assuan_context_t ctx;
|
|
const char *sockname;
|
|
int did_success_msg = 0;
|
|
|
|
*r_ctx = NULL;
|
|
|
|
err = assuan_new (&ctx);
|
|
if (err)
|
|
{
|
|
log_error ("error allocating assuan context: %s\n", gpg_strerror (err));
|
|
return err;
|
|
}
|
|
|
|
sockname = dirmngr_socket_name ();
|
|
err = assuan_socket_connect (ctx, sockname, 0, 0);
|
|
|
|
#ifdef USE_DIRMNGR_AUTO_START
|
|
if (err && autostart)
|
|
{
|
|
lock_spawn_t lock;
|
|
const char *argv[4];
|
|
char *abs_homedir;
|
|
|
|
/* No connection: Try start a new Dirmngr. */
|
|
if (!dirmngr_program || !*dirmngr_program)
|
|
dirmngr_program = gnupg_module_name (GNUPG_MODULE_NAME_DIRMNGR);
|
|
|
|
if (verbose)
|
|
log_info (_("no running Dirmngr - starting '%s'\n"),
|
|
dirmngr_program);
|
|
|
|
if (status_cb)
|
|
status_cb (status_cb_arg, STATUS_PROGRESS,
|
|
"starting_dirmngr ? 0 0", NULL);
|
|
|
|
abs_homedir = make_absfilename (gnupg_homedir (), NULL);
|
|
if (!abs_homedir)
|
|
{
|
|
gpg_error_t tmperr = gpg_err_make (errsource,
|
|
gpg_err_code_from_syserror ());
|
|
log_error ("error building filename: %s\n",gpg_strerror (tmperr));
|
|
assuan_release (ctx);
|
|
return tmperr;
|
|
}
|
|
|
|
if (fflush (NULL))
|
|
{
|
|
gpg_error_t tmperr = gpg_err_make (errsource,
|
|
gpg_err_code_from_syserror ());
|
|
log_error ("error flushing pending output: %s\n",
|
|
strerror (errno));
|
|
assuan_release (ctx);
|
|
return tmperr;
|
|
}
|
|
|
|
argv[0] = "--daemon";
|
|
/* Try starting the daemon. Versions of dirmngr < 2.1.15 do
|
|
* this only if the home directory is given on the command line. */
|
|
argv[1] = "--homedir";
|
|
argv[2] = abs_homedir;
|
|
argv[3] = NULL;
|
|
|
|
if (!(err = lock_spawning (&lock, gnupg_homedir (), "dirmngr", verbose))
|
|
&& assuan_socket_connect (ctx, sockname, 0, 0))
|
|
{
|
|
err = gnupg_spawn_process_detached (dirmngr_program, argv, NULL);
|
|
if (err)
|
|
log_error ("failed to start the dirmngr '%s': %s\n",
|
|
dirmngr_program, gpg_strerror (err));
|
|
else
|
|
err = wait_for_sock (SECS_TO_WAIT_FOR_DIRMNGR, "dirmngr",
|
|
sockname, verbose, ctx, &did_success_msg);
|
|
}
|
|
|
|
unlock_spawning (&lock, "dirmngr");
|
|
xfree (abs_homedir);
|
|
}
|
|
#else
|
|
(void)dirmngr_program;
|
|
(void)verbose;
|
|
(void)status_cb;
|
|
(void)status_cb_arg;
|
|
#endif /*USE_DIRMNGR_AUTO_START*/
|
|
|
|
if (err)
|
|
{
|
|
if (autostart || gpg_err_code (err) != GPG_ERR_ASS_CONNECT_FAILED)
|
|
log_error ("connecting dirmngr at '%s' failed: %s\n",
|
|
sockname, gpg_strerror (err));
|
|
assuan_release (ctx);
|
|
return gpg_err_make (errsource, GPG_ERR_NO_DIRMNGR);
|
|
}
|
|
|
|
if (debug && !did_success_msg)
|
|
log_debug ("connection to the dirmngr established\n");
|
|
|
|
*r_ctx = ctx;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Return the version of a server using "GETINFO version". On success
|
|
0 is returned and R_VERSION receives a malloced string with the
|
|
version which must be freed by the caller. On error NULL is stored
|
|
at R_VERSION and an error code returned. Mode is in general 0 but
|
|
certain values may be used to modify the used version command:
|
|
|
|
MODE == 0 = Use "GETINFO version"
|
|
MODE == 2 - Use "SCD GETINFO version"
|
|
*/
|
|
gpg_error_t
|
|
get_assuan_server_version (assuan_context_t ctx, int mode, char **r_version)
|
|
{
|
|
gpg_error_t err;
|
|
membuf_t data;
|
|
|
|
init_membuf (&data, 64);
|
|
err = assuan_transact (ctx,
|
|
mode == 2? "SCD GETINFO version"
|
|
/**/ : "GETINFO version",
|
|
put_membuf_cb, &data,
|
|
NULL, NULL, NULL, NULL);
|
|
if (err)
|
|
{
|
|
xfree (get_membuf (&data, NULL));
|
|
*r_version = NULL;
|
|
}
|
|
else
|
|
{
|
|
put_membuf (&data, "", 1);
|
|
*r_version = get_membuf (&data, NULL);
|
|
if (!*r_version)
|
|
err = gpg_error_from_syserror ();
|
|
}
|
|
return err;
|
|
}
|