mirror of git://git.gnupg.org/gnupg.git
427 lines
9.9 KiB
C
427 lines
9.9 KiB
C
/* call-dirmngr.c - Interact with the Dirmngr.
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* Copyright (C) 2016, 2022 g10 Code GmbH
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* Copyright (C) 2016 Bundesamt für Sicherheit in der Informationstechnik
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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 the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser 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 <errno.h>
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#include <unistd.h>
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#include <time.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 <assuan.h>
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#include "../common/util.h"
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#include "../common/i18n.h"
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#include "../common/asshelp.h"
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#include "../common/mbox-util.h"
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#include "./call-dirmngr.h"
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static struct
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{
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int verbose;
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int debug_ipc;
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int autostart;
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} opt;
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void
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set_dirmngr_options (int verbose, int debug_ipc, int autostart)
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{
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opt.verbose = verbose;
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opt.debug_ipc = debug_ipc;
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opt.autostart = autostart;
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}
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/* Connect to the Dirmngr and return an assuan context. */
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static gpg_error_t
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connect_dirmngr (assuan_context_t *r_ctx)
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{
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gpg_error_t err;
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assuan_context_t ctx;
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*r_ctx = NULL;
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err = start_new_dirmngr (&ctx,
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GPG_ERR_SOURCE_DEFAULT,
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NULL,
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opt.autostart?ASSHELP_FLAG_AUTOSTART:0,
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opt.verbose, opt.debug_ipc,
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NULL, NULL);
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if (!opt.autostart && gpg_err_code (err) == GPG_ERR_NO_DIRMNGR)
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{
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static int shown;
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if (!shown)
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{
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shown = 1;
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log_info (_("no dirmngr running in this session\n"));
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}
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}
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if (err)
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assuan_release (ctx);
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else
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{
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*r_ctx = ctx;
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}
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return err;
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}
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/* Parameter structure used with the WKD_GET command. */
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struct wkd_get_parm_s
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{
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estream_t memfp;
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};
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/* Data callback for the WKD_GET command. */
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static gpg_error_t
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wkd_get_data_cb (void *opaque, const void *data, size_t datalen)
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{
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struct wkd_get_parm_s *parm = opaque;
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gpg_error_t err = 0;
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size_t nwritten;
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if (!data)
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return 0; /* Ignore END commands. */
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if (!parm->memfp)
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return 0; /* Data is not required. */
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if (es_write (parm->memfp, data, datalen, &nwritten))
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err = gpg_error_from_syserror ();
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return err;
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}
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/* Status callback for the WKD_GET command. */
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static gpg_error_t
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wkd_get_status_cb (void *opaque, const char *line)
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{
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struct wkd_get_parm_s *parm = opaque;
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gpg_error_t err = 0;
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const char *s, *s2;
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const char *warn = NULL;
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int is_note = 0;
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(void)parm;
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/* Note: The code below is mostly duplicated from g10/call-dirmngr.c */
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if ((s = has_leading_keyword (line, "WARNING"))
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|| (is_note = !!(s = has_leading_keyword (line, "NOTE"))))
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{
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if ((s2 = has_leading_keyword (s, "wkd_cached_result")))
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{
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if (opt.verbose)
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warn = _("WKD uses a cached result");
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}
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else if ((s2 = has_leading_keyword (s, "tor_not_running")))
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warn = _("Tor is not running");
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else if ((s2 = has_leading_keyword (s, "tor_config_problem")))
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warn = _("Tor is not properly configured");
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else if ((s2 = has_leading_keyword (s, "dns_config_problem")))
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warn = _("DNS is not properly configured");
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else if ((s2 = has_leading_keyword (s, "http_redirect")))
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warn = _("unacceptable HTTP redirect from server");
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else if ((s2 = has_leading_keyword (s, "http_redirect_cleanup")))
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warn = _("unacceptable HTTP redirect from server was cleaned up");
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else if ((s2 = has_leading_keyword (s, "tls_cert_error")))
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warn = _("server uses an invalid certificate");
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else
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warn = NULL;
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if (warn)
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{
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if (is_note)
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log_info (_("Note: %s\n"), warn);
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else
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log_info (_("WARNING: %s\n"), warn);
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if (s2 && opt.verbose)
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{
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while (*s2 && !spacep (s2))
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s2++;
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while (*s2 && spacep (s2))
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s2++;
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if (*s2)
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log_info ("(%s)\n", s2);
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}
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}
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}
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return err;
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}
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/* Ask the dirmngr for the submission address of a WKD server for the
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* mail address ADDRSPEC. On success the submission address is stored
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* at R_ADDRSPEC. */
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gpg_error_t
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wkd_get_submission_address (const char *addrspec, char **r_addrspec)
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{
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gpg_error_t err;
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assuan_context_t ctx;
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struct wkd_get_parm_s parm;
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char *line = NULL;
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void *vp;
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char *buffer = NULL;
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char *p;
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memset (&parm, 0, sizeof parm);
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*r_addrspec = NULL;
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err = connect_dirmngr (&ctx);
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if (err)
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return err;
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line = es_bsprintf ("WKD_GET --submission-address -- %s", addrspec);
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if (!line)
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{
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err = gpg_error_from_syserror ();
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goto leave;
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}
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if (strlen (line) + 2 >= ASSUAN_LINELENGTH)
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{
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err = gpg_error (GPG_ERR_TOO_LARGE);
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goto leave;
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}
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parm.memfp = es_fopenmem (0, "rwb");
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if (!parm.memfp)
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{
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err = gpg_error_from_syserror ();
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goto leave;
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}
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err = assuan_transact (ctx, line, wkd_get_data_cb, &parm,
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NULL, NULL, wkd_get_status_cb, &parm);
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if (err)
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goto leave;
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es_fputc (0, parm.memfp);
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if (es_fclose_snatch (parm.memfp, &vp, NULL))
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{
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err = gpg_error_from_syserror ();
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goto leave;
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}
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buffer = vp;
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parm.memfp = NULL;
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p = strchr (buffer, '\n');
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if (p)
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*p = 0;
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trim_spaces (buffer);
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if (!is_valid_mailbox (buffer))
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{
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err = gpg_error (GPG_ERR_INV_USER_ID);
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goto leave;
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}
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*r_addrspec = xtrystrdup (buffer);
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if (!*r_addrspec)
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err = gpg_error_from_syserror ();
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leave:
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es_free (buffer);
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es_fclose (parm.memfp);
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xfree (line);
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assuan_release (ctx);
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return err;
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}
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/* Ask the dirmngr for the policy flags and return them as an estream
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* memory stream. If no policy flags are set, NULL is stored at
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* R_BUFFER. */
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gpg_error_t
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wkd_get_policy_flags (const char *addrspec, estream_t *r_buffer)
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{
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gpg_error_t err;
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assuan_context_t ctx;
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struct wkd_get_parm_s parm;
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char *line = NULL;
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char *buffer = NULL;
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memset (&parm, 0, sizeof parm);
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*r_buffer = NULL;
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err = connect_dirmngr (&ctx);
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if (err)
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return err;
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line = es_bsprintf ("WKD_GET --policy-flags -- %s", addrspec);
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if (!line)
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{
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err = gpg_error_from_syserror ();
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goto leave;
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}
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if (strlen (line) + 2 >= ASSUAN_LINELENGTH)
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{
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err = gpg_error (GPG_ERR_TOO_LARGE);
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goto leave;
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}
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parm.memfp = es_fopenmem (0, "rwb");
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if (!parm.memfp)
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{
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err = gpg_error_from_syserror ();
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goto leave;
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}
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err = assuan_transact (ctx, line, wkd_get_data_cb, &parm,
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NULL, NULL, wkd_get_status_cb, &parm);
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if (err)
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goto leave;
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es_rewind (parm.memfp);
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*r_buffer = parm.memfp;
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parm.memfp = 0;
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leave:
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es_free (buffer);
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es_fclose (parm.memfp);
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xfree (line);
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assuan_release (ctx);
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return err;
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}
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/* Ask the dirmngr for the key for ADDRSPEC. On success a stream with
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* the key is stored at R_KEY. */
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gpg_error_t
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wkd_get_key (const char *addrspec, estream_t *r_key)
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{
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gpg_error_t err;
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assuan_context_t ctx;
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struct wkd_get_parm_s parm;
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char *line = NULL;
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memset (&parm, 0, sizeof parm);
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*r_key = NULL;
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err = connect_dirmngr (&ctx);
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if (err)
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return err;
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line = es_bsprintf ("WKD_GET -- %s", addrspec);
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if (!line)
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{
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err = gpg_error_from_syserror ();
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goto leave;
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}
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if (strlen (line) + 2 >= ASSUAN_LINELENGTH)
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{
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err = gpg_error (GPG_ERR_TOO_LARGE);
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goto leave;
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}
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parm.memfp = es_fopenmem (0, "rwb");
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if (!parm.memfp)
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{
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err = gpg_error_from_syserror ();
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goto leave;
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}
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err = assuan_transact (ctx, line, wkd_get_data_cb, &parm,
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NULL, NULL, wkd_get_status_cb, &parm);
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if (err)
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goto leave;
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es_rewind (parm.memfp);
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*r_key = parm.memfp;
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parm.memfp = NULL;
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leave:
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es_fclose (parm.memfp);
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xfree (line);
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assuan_release (ctx);
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return err;
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}
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/* Send the KS_GET command to the dirmngr. The caller provides CB
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* which is called for each key. The callback is called wit a stream
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* conveying a single key and several other informational parameters.
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* DOMAIN restricts the returned keys to this domain. */
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gpg_error_t
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wkd_dirmngr_ks_get (const char *domain, gpg_error_t cb (estream_t key))
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{
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gpg_error_t err;
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assuan_context_t ctx;
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struct wkd_get_parm_s parm;
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char *line = NULL;
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int any = 0;
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memset (&parm, 0, sizeof parm);
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err = connect_dirmngr (&ctx);
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if (err)
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return err;
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line = es_bsprintf ("KS_GET --ldap --first %s", domain? domain:"");
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if (!line)
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{
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err = gpg_error_from_syserror ();
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goto leave;
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}
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if (strlen (line) + 2 >= ASSUAN_LINELENGTH)
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{
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err = gpg_error (GPG_ERR_TOO_LARGE);
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goto leave;
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}
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parm.memfp = es_fopenmem (0, "rwb");
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if (!parm.memfp)
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{
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err = gpg_error_from_syserror ();
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goto leave;
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}
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for (;;)
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{
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err = assuan_transact (ctx, any? "KS_GET --next" : line,
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wkd_get_data_cb, &parm,
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NULL, NULL, wkd_get_status_cb, &parm);
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if (err)
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{
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if (gpg_err_code (err) == GPG_ERR_NO_DATA
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&& gpg_err_source (err) == GPG_ERR_SOURCE_DIRMNGR)
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err = any? 0 : gpg_error (GPG_ERR_NOT_FOUND);
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goto leave;
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}
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any = 1;
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es_rewind (parm.memfp);
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err = cb (parm.memfp);
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if (err)
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break;
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es_ftruncate (parm.memfp, 0);
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}
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leave:
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es_fclose (parm.memfp);
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xfree (line);
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assuan_release (ctx);
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return err;
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}
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