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git://git.gnupg.org/gnupg.git
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1242 lines
30 KiB
C
1242 lines
30 KiB
C
/* wks-utils.c - Common helper functions for wks tools
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* Copyright (C) 2016 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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#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 <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include "../common/util.h"
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#include "../common/status.h"
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#include "../common/ccparray.h"
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#include "../common/exectool.h"
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#include "../common/zb32.h"
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#include "../common/userids.h"
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#include "../common/mbox-util.h"
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#include "../common/sysutils.h"
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#include "mime-maker.h"
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#include "send-mail.h"
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#include "gpg-wks.h"
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/* The stream to output the status information. Output is disabled if
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this is NULL. */
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static estream_t statusfp;
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/* Set the status FD. */
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void
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wks_set_status_fd (int fd)
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{
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static int last_fd = -1;
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if (fd != -1 && last_fd == fd)
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return;
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if (statusfp && statusfp != es_stdout && statusfp != es_stderr)
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es_fclose (statusfp);
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statusfp = NULL;
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if (fd == -1)
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return;
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if (fd == 1)
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statusfp = es_stdout;
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else if (fd == 2)
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statusfp = es_stderr;
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else
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statusfp = es_fdopen (fd, "w");
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if (!statusfp)
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{
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log_fatal ("can't open fd %d for status output: %s\n",
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fd, gpg_strerror (gpg_error_from_syserror ()));
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}
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last_fd = fd;
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}
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/* Write a status line with code NO followed by the output of the
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* printf style FORMAT. The caller needs to make sure that LFs and
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* CRs are not printed. */
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void
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wks_write_status (int no, const char *format, ...)
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{
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va_list arg_ptr;
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if (!statusfp)
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return; /* Not enabled. */
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es_fputs ("[GNUPG:] ", statusfp);
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es_fputs (get_status_string (no), statusfp);
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if (format)
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{
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es_putc (' ', statusfp);
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va_start (arg_ptr, format);
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es_vfprintf (statusfp, format, arg_ptr);
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va_end (arg_ptr);
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}
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es_putc ('\n', statusfp);
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}
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/* Append UID to LIST and return the new item. On success LIST is
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* updated. C-style escaping is removed from UID. On error ERRNO is
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* set and NULL returned. */
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static uidinfo_list_t
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append_to_uidinfo_list (uidinfo_list_t *list, const char *uid, time_t created)
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{
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uidinfo_list_t r, sl;
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char *plainuid;
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plainuid = decode_c_string (uid);
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if (!plainuid)
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return NULL;
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sl = xtrymalloc (sizeof *sl + strlen (plainuid));
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if (!sl)
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{
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xfree (plainuid);
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return NULL;
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}
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strcpy (sl->uid, plainuid);
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sl->created = created;
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sl->mbox = mailbox_from_userid (plainuid, 0);
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sl->next = NULL;
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if (!*list)
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*list = sl;
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else
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{
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for (r = *list; r->next; r = r->next )
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;
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r->next = sl;
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}
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xfree (plainuid);
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return sl;
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}
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/* Free the list of uid infos at LIST. */
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void
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free_uidinfo_list (uidinfo_list_t list)
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{
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while (list)
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{
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uidinfo_list_t tmp = list->next;
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xfree (list->mbox);
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xfree (list);
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list = tmp;
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}
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}
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struct get_key_status_parm_s
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{
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const char *fpr;
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int found;
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int count;
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};
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static void
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get_key_status_cb (void *opaque, const char *keyword, char *args)
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{
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struct get_key_status_parm_s *parm = opaque;
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/*log_debug ("%s: %s\n", keyword, args);*/
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if (!strcmp (keyword, "EXPORTED"))
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{
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parm->count++;
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if (!ascii_strcasecmp (args, parm->fpr))
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parm->found = 1;
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}
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}
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/* Get a key by fingerprint from gpg's keyring and make sure that the
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* mail address ADDRSPEC is included in the key. If EXACT is set the
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* returned user id must match Addrspec exactly and not just in the
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* addr-spec (mailbox) part. The key is returned as a new memory
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* stream at R_KEY. */
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gpg_error_t
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wks_get_key (estream_t *r_key, const char *fingerprint, const char *addrspec,
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int exact)
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{
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gpg_error_t err;
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ccparray_t ccp;
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const char **argv = NULL;
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estream_t key = NULL;
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struct get_key_status_parm_s parm;
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char *filterexp = NULL;
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memset (&parm, 0, sizeof parm);
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*r_key = NULL;
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key = es_fopenmem (0, "w+b");
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if (!key)
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{
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err = gpg_error_from_syserror ();
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log_error ("error allocating memory buffer: %s\n", gpg_strerror (err));
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goto leave;
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}
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/* Prefix the key with the MIME content type. */
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es_fputs ("Content-Type: application/pgp-keys\n"
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"\n", key);
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filterexp = es_bsprintf ("keep-uid=%s= %s", exact? "uid":"mbox", addrspec);
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if (!filterexp)
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{
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err = gpg_error_from_syserror ();
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log_error ("error allocating memory buffer: %s\n", gpg_strerror (err));
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goto leave;
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}
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ccparray_init (&ccp, 0);
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ccparray_put (&ccp, "--no-options");
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if (!opt.verbose)
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ccparray_put (&ccp, "--quiet");
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else if (opt.verbose > 1)
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ccparray_put (&ccp, "--verbose");
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ccparray_put (&ccp, "--batch");
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ccparray_put (&ccp, "--status-fd=2");
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ccparray_put (&ccp, "--always-trust");
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ccparray_put (&ccp, "--armor");
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ccparray_put (&ccp, "--export-options=export-minimal");
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ccparray_put (&ccp, "--export-filter");
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ccparray_put (&ccp, filterexp);
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ccparray_put (&ccp, "--export");
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ccparray_put (&ccp, "--");
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ccparray_put (&ccp, fingerprint);
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ccparray_put (&ccp, NULL);
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argv = ccparray_get (&ccp, NULL);
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if (!argv)
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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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parm.fpr = fingerprint;
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err = gnupg_exec_tool_stream (opt.gpg_program, argv, NULL,
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NULL, key,
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get_key_status_cb, &parm);
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if (!err && parm.count > 1)
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err = gpg_error (GPG_ERR_TOO_MANY);
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else if (!err && !parm.found)
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err = gpg_error (GPG_ERR_NOT_FOUND);
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if (err)
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{
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log_error ("export failed: %s\n", gpg_strerror (err));
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goto leave;
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}
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es_rewind (key);
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*r_key = key;
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key = NULL;
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leave:
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es_fclose (key);
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xfree (argv);
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xfree (filterexp);
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return err;
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}
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/* Helper for wks_list_key and wks_filter_uid. */
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static void
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key_status_cb (void *opaque, const char *keyword, char *args)
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{
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(void)opaque;
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if (DBG_CRYPTO)
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log_debug ("gpg status: %s %s\n", keyword, args);
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}
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/* Run gpg on KEY and store the primary fingerprint at R_FPR and the
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* list of mailboxes at R_MBOXES. Returns 0 on success; on error NULL
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* is stored at R_FPR and R_MBOXES and an error code is returned.
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* R_FPR may be NULL if the fingerprint is not needed. */
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gpg_error_t
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wks_list_key (estream_t key, char **r_fpr, uidinfo_list_t *r_mboxes)
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{
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gpg_error_t err;
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ccparray_t ccp;
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const char **argv;
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estream_t listing;
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char *line = NULL;
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size_t length_of_line = 0;
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size_t maxlen;
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ssize_t len;
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char **fields = NULL;
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int nfields;
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int lnr;
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char *fpr = NULL;
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uidinfo_list_t mboxes = NULL;
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if (r_fpr)
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*r_fpr = NULL;
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*r_mboxes = NULL;
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/* Open a memory stream. */
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listing = es_fopenmem (0, "w+b");
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if (!listing)
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{
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err = gpg_error_from_syserror ();
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log_error ("error allocating memory buffer: %s\n", gpg_strerror (err));
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return err;
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}
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ccparray_init (&ccp, 0);
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||
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ccparray_put (&ccp, "--no-options");
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if (!opt.verbose)
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ccparray_put (&ccp, "--quiet");
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else if (opt.verbose > 1)
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ccparray_put (&ccp, "--verbose");
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ccparray_put (&ccp, "--batch");
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ccparray_put (&ccp, "--status-fd=2");
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ccparray_put (&ccp, "--always-trust");
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||
ccparray_put (&ccp, "--with-colons");
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ccparray_put (&ccp, "--dry-run");
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||
ccparray_put (&ccp, "--import-options=import-minimal,import-show");
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||
ccparray_put (&ccp, "--import");
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||
|
||
ccparray_put (&ccp, NULL);
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||
argv = ccparray_get (&ccp, NULL);
|
||
if (!argv)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
err = gnupg_exec_tool_stream (opt.gpg_program, argv, key,
|
||
NULL, listing,
|
||
key_status_cb, NULL);
|
||
if (err)
|
||
{
|
||
log_error ("import failed: %s\n", gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
es_rewind (listing);
|
||
lnr = 0;
|
||
maxlen = 2048; /* Set limit. */
|
||
while ((len = es_read_line (listing, &line, &length_of_line, &maxlen)) > 0)
|
||
{
|
||
lnr++;
|
||
if (!maxlen)
|
||
{
|
||
log_error ("received line too long\n");
|
||
err = gpg_error (GPG_ERR_LINE_TOO_LONG);
|
||
goto leave;
|
||
}
|
||
/* Strip newline and carriage return, if present. */
|
||
while (len > 0
|
||
&& (line[len - 1] == '\n' || line[len - 1] == '\r'))
|
||
line[--len] = '\0';
|
||
/* log_debug ("line '%s'\n", line); */
|
||
|
||
xfree (fields);
|
||
fields = strtokenize_nt (line, ":");
|
||
if (!fields)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("strtokenize failed: %s\n", gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
for (nfields = 0; fields[nfields]; nfields++)
|
||
;
|
||
if (!nfields)
|
||
{
|
||
err = gpg_error (GPG_ERR_INV_ENGINE);
|
||
goto leave;
|
||
}
|
||
if (!strcmp (fields[0], "sec"))
|
||
{
|
||
/* gpg may return "sec" as the first record - but we do not
|
||
* accept secret keys. */
|
||
err = gpg_error (GPG_ERR_NO_PUBKEY);
|
||
goto leave;
|
||
}
|
||
if (lnr == 1 && strcmp (fields[0], "pub"))
|
||
{
|
||
/* First record is not a public key. */
|
||
err = gpg_error (GPG_ERR_INV_ENGINE);
|
||
goto leave;
|
||
}
|
||
if (lnr > 1 && !strcmp (fields[0], "pub"))
|
||
{
|
||
/* More than one public key. */
|
||
err = gpg_error (GPG_ERR_TOO_MANY);
|
||
goto leave;
|
||
}
|
||
if (!strcmp (fields[0], "sub") || !strcmp (fields[0], "ssb"))
|
||
break; /* We can stop parsing here. */
|
||
|
||
if (!strcmp (fields[0], "fpr") && nfields > 9 && !fpr)
|
||
{
|
||
fpr = xtrystrdup (fields[9]);
|
||
if (!fpr)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
}
|
||
else if (!strcmp (fields[0], "uid") && nfields > 9)
|
||
{
|
||
if (!append_to_uidinfo_list (&mboxes, fields[9],
|
||
parse_timestamp (fields[5], NULL)))
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
}
|
||
}
|
||
if (len < 0 || es_ferror (listing))
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error reading memory stream\n");
|
||
goto leave;
|
||
}
|
||
|
||
if (!fpr)
|
||
{
|
||
err = gpg_error (GPG_ERR_NO_PUBKEY);
|
||
goto leave;
|
||
}
|
||
|
||
if (r_fpr)
|
||
{
|
||
*r_fpr = fpr;
|
||
fpr = NULL;
|
||
}
|
||
*r_mboxes = mboxes;
|
||
mboxes = NULL;
|
||
|
||
leave:
|
||
xfree (fpr);
|
||
free_uidinfo_list (mboxes);
|
||
xfree (fields);
|
||
es_free (line);
|
||
xfree (argv);
|
||
es_fclose (listing);
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Run gpg as a filter on KEY and write the output to a new stream
|
||
* stored at R_NEWKEY. The new key will contain only the user id UID.
|
||
* Returns 0 on success. Only one key is expected in KEY. If BINARY
|
||
* is set the resulting key is returned as a binary (non-armored)
|
||
* keyblock. */
|
||
gpg_error_t
|
||
wks_filter_uid (estream_t *r_newkey, estream_t key, const char *uid,
|
||
int binary)
|
||
{
|
||
gpg_error_t err;
|
||
ccparray_t ccp;
|
||
const char **argv = NULL;
|
||
estream_t newkey;
|
||
char *filterexp = NULL;
|
||
|
||
*r_newkey = NULL;
|
||
|
||
/* Open a memory stream. */
|
||
newkey = es_fopenmem (0, "w+b");
|
||
if (!newkey)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error allocating memory buffer: %s\n", gpg_strerror (err));
|
||
return err;
|
||
}
|
||
|
||
/* Prefix the key with the MIME content type. */
|
||
if (!binary)
|
||
es_fputs ("Content-Type: application/pgp-keys\n"
|
||
"\n", newkey);
|
||
|
||
filterexp = es_bsprintf ("keep-uid=-t uid= %s", uid);
|
||
if (!filterexp)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error allocating memory buffer: %s\n", gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
ccparray_init (&ccp, 0);
|
||
|
||
ccparray_put (&ccp, "--no-options");
|
||
if (!opt.verbose)
|
||
ccparray_put (&ccp, "--quiet");
|
||
else if (opt.verbose > 1)
|
||
ccparray_put (&ccp, "--verbose");
|
||
ccparray_put (&ccp, "--batch");
|
||
ccparray_put (&ccp, "--status-fd=2");
|
||
ccparray_put (&ccp, "--always-trust");
|
||
if (!binary)
|
||
ccparray_put (&ccp, "--armor");
|
||
ccparray_put (&ccp, "--import-options=import-export");
|
||
ccparray_put (&ccp, "--import-filter");
|
||
ccparray_put (&ccp, filterexp);
|
||
ccparray_put (&ccp, "--import");
|
||
|
||
ccparray_put (&ccp, NULL);
|
||
argv = ccparray_get (&ccp, NULL);
|
||
if (!argv)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
err = gnupg_exec_tool_stream (opt.gpg_program, argv, key,
|
||
NULL, newkey,
|
||
key_status_cb, NULL);
|
||
if (err)
|
||
{
|
||
log_error ("import/export failed: %s\n", gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
es_rewind (newkey);
|
||
*r_newkey = newkey;
|
||
newkey = NULL;
|
||
|
||
leave:
|
||
xfree (filterexp);
|
||
xfree (argv);
|
||
es_fclose (newkey);
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Helper to write mail to the output(s). */
|
||
gpg_error_t
|
||
wks_send_mime (mime_maker_t mime)
|
||
{
|
||
gpg_error_t err;
|
||
estream_t mail;
|
||
|
||
/* Without any option we take a short path. */
|
||
if (!opt.use_sendmail && !opt.output)
|
||
{
|
||
es_set_binary (es_stdout);
|
||
return mime_maker_make (mime, es_stdout);
|
||
}
|
||
|
||
|
||
mail = es_fopenmem (0, "w+b");
|
||
if (!mail)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
return err;
|
||
}
|
||
|
||
err = mime_maker_make (mime, mail);
|
||
|
||
if (!err && opt.output)
|
||
{
|
||
es_rewind (mail);
|
||
err = send_mail_to_file (mail, opt.output);
|
||
}
|
||
|
||
if (!err && opt.use_sendmail)
|
||
{
|
||
es_rewind (mail);
|
||
err = send_mail (mail);
|
||
}
|
||
|
||
es_fclose (mail);
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Parse the policy flags by reading them from STREAM and storing them
|
||
* into FLAGS. If IGNORE_UNKNOWN is set unknown keywords are
|
||
* ignored. */
|
||
gpg_error_t
|
||
wks_parse_policy (policy_flags_t flags, estream_t stream, int ignore_unknown)
|
||
{
|
||
enum tokens {
|
||
TOK_SUBMISSION_ADDRESS,
|
||
TOK_MAILBOX_ONLY,
|
||
TOK_DANE_ONLY,
|
||
TOK_AUTH_SUBMIT,
|
||
TOK_MAX_PENDING,
|
||
TOK_PROTOCOL_VERSION
|
||
};
|
||
static struct {
|
||
const char *name;
|
||
enum tokens token;
|
||
} keywords[] = {
|
||
{ "submission-address", TOK_SUBMISSION_ADDRESS },
|
||
{ "mailbox-only", TOK_MAILBOX_ONLY },
|
||
{ "dane-only", TOK_DANE_ONLY },
|
||
{ "auth-submit", TOK_AUTH_SUBMIT },
|
||
{ "max-pending", TOK_MAX_PENDING },
|
||
{ "protocol-version", TOK_PROTOCOL_VERSION }
|
||
};
|
||
gpg_error_t err = 0;
|
||
int lnr = 0;
|
||
char line[1024];
|
||
char *p, *keyword, *value;
|
||
int i, n;
|
||
|
||
memset (flags, 0, sizeof *flags);
|
||
|
||
while (es_fgets (line, DIM(line)-1, stream) )
|
||
{
|
||
lnr++;
|
||
n = strlen (line);
|
||
if (!n || line[n-1] != '\n')
|
||
{
|
||
err = gpg_error (*line? GPG_ERR_LINE_TOO_LONG
|
||
: GPG_ERR_INCOMPLETE_LINE);
|
||
break;
|
||
}
|
||
trim_trailing_spaces (line);
|
||
/* Skip empty and comment lines. */
|
||
for (p=line; spacep (p); p++)
|
||
;
|
||
if (!*p || *p == '#')
|
||
continue;
|
||
|
||
if (*p == ':')
|
||
{
|
||
err = gpg_error (GPG_ERR_SYNTAX);
|
||
break;
|
||
}
|
||
|
||
keyword = p;
|
||
value = NULL;
|
||
if ((p = strchr (p, ':')))
|
||
{
|
||
/* Colon found: Keyword with value. */
|
||
*p++ = 0;
|
||
for (; spacep (p); p++)
|
||
;
|
||
if (!*p)
|
||
{
|
||
err = gpg_error (GPG_ERR_MISSING_VALUE);
|
||
break;
|
||
}
|
||
value = p;
|
||
}
|
||
|
||
for (i=0; i < DIM (keywords); i++)
|
||
if (!ascii_strcasecmp (keywords[i].name, keyword))
|
||
break;
|
||
if (!(i < DIM (keywords)))
|
||
{
|
||
if (ignore_unknown)
|
||
continue;
|
||
err = gpg_error (GPG_ERR_INV_NAME);
|
||
break;
|
||
}
|
||
|
||
switch (keywords[i].token)
|
||
{
|
||
case TOK_SUBMISSION_ADDRESS:
|
||
if (!value || !*value)
|
||
{
|
||
err = gpg_error (GPG_ERR_SYNTAX);
|
||
goto leave;
|
||
}
|
||
xfree (flags->submission_address);
|
||
flags->submission_address = xtrystrdup (value);
|
||
if (!flags->submission_address)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
break;
|
||
case TOK_MAILBOX_ONLY: flags->mailbox_only = 1; break;
|
||
case TOK_DANE_ONLY: flags->dane_only = 1; break;
|
||
case TOK_AUTH_SUBMIT: flags->auth_submit = 1; break;
|
||
case TOK_MAX_PENDING:
|
||
if (!value)
|
||
{
|
||
err = gpg_error (GPG_ERR_SYNTAX);
|
||
goto leave;
|
||
}
|
||
/* FIXME: Define whether these are seconds, hours, or days
|
||
* and decide whether to allow other units. */
|
||
flags->max_pending = atoi (value);
|
||
break;
|
||
case TOK_PROTOCOL_VERSION:
|
||
if (!value)
|
||
{
|
||
err = gpg_error (GPG_ERR_SYNTAX);
|
||
goto leave;
|
||
}
|
||
flags->protocol_version = atoi (value);
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (!err && !es_feof (stream))
|
||
err = gpg_error_from_syserror ();
|
||
|
||
leave:
|
||
if (err)
|
||
log_error ("error reading '%s', line %d: %s\n",
|
||
es_fname_get (stream), lnr, gpg_strerror (err));
|
||
|
||
return err;
|
||
}
|
||
|
||
|
||
void
|
||
wks_free_policy (policy_flags_t policy)
|
||
{
|
||
if (policy)
|
||
{
|
||
xfree (policy->submission_address);
|
||
memset (policy, 0, sizeof *policy);
|
||
}
|
||
}
|
||
|
||
|
||
/* Write the content of SRC to the new file FNAME. */
|
||
static gpg_error_t
|
||
write_to_file (estream_t src, const char *fname)
|
||
{
|
||
gpg_error_t err;
|
||
estream_t dst;
|
||
char buffer[4096];
|
||
size_t nread, written;
|
||
|
||
dst = es_fopen (fname, "wb");
|
||
if (!dst)
|
||
return gpg_error_from_syserror ();
|
||
|
||
do
|
||
{
|
||
nread = es_fread (buffer, 1, sizeof buffer, src);
|
||
if (!nread)
|
||
break;
|
||
written = es_fwrite (buffer, 1, nread, dst);
|
||
if (written != nread)
|
||
break;
|
||
}
|
||
while (!es_feof (src) && !es_ferror (src) && !es_ferror (dst));
|
||
if (!es_feof (src) || es_ferror (src) || es_ferror (dst))
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
es_fclose (dst);
|
||
gnupg_remove (fname);
|
||
return err;
|
||
}
|
||
|
||
if (es_fclose (dst))
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error closing '%s': %s\n", fname, gpg_strerror (err));
|
||
return err;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Return the filename and optionally the addrspec for USERID at
|
||
* R_FNAME and R_ADDRSPEC. R_ADDRSPEC might also be set on error. If
|
||
* HASH_ONLY is set only the has is returned at R_FNAME and no file is
|
||
* created. */
|
||
gpg_error_t
|
||
wks_fname_from_userid (const char *userid, int hash_only,
|
||
char **r_fname, char **r_addrspec)
|
||
{
|
||
gpg_error_t err;
|
||
char *addrspec = NULL;
|
||
const char *domain;
|
||
char *hash = NULL;
|
||
const char *s;
|
||
char shaxbuf[32]; /* Used for SHA-1 and SHA-256 */
|
||
|
||
*r_fname = NULL;
|
||
if (r_addrspec)
|
||
*r_addrspec = NULL;
|
||
|
||
addrspec = mailbox_from_userid (userid, 0);
|
||
if (!addrspec)
|
||
{
|
||
if (opt.verbose || hash_only)
|
||
log_info ("\"%s\" is not a proper mail address\n", userid);
|
||
err = gpg_error (GPG_ERR_INV_USER_ID);
|
||
goto leave;
|
||
}
|
||
|
||
domain = strchr (addrspec, '@');
|
||
log_assert (domain);
|
||
domain++;
|
||
|
||
/* Hash user ID and create filename. */
|
||
s = strchr (addrspec, '@');
|
||
log_assert (s);
|
||
gcry_md_hash_buffer (GCRY_MD_SHA1, shaxbuf, addrspec, s - addrspec);
|
||
hash = zb32_encode (shaxbuf, 8*20);
|
||
if (!hash)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
goto leave;
|
||
}
|
||
|
||
if (hash_only)
|
||
{
|
||
*r_fname = hash;
|
||
hash = NULL;
|
||
err = 0;
|
||
}
|
||
else
|
||
{
|
||
*r_fname = make_filename_try (opt.directory, domain, "hu", hash, NULL);
|
||
if (!*r_fname)
|
||
err = gpg_error_from_syserror ();
|
||
else
|
||
err = 0;
|
||
}
|
||
|
||
leave:
|
||
if (r_addrspec && addrspec)
|
||
*r_addrspec = addrspec;
|
||
else
|
||
xfree (addrspec);
|
||
xfree (hash);
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Compute the the full file name for the key with ADDRSPEC and return
|
||
* it at R_FNAME. */
|
||
gpg_error_t
|
||
wks_compute_hu_fname (char **r_fname, const char *addrspec)
|
||
{
|
||
gpg_error_t err;
|
||
char *hash;
|
||
const char *domain;
|
||
char sha1buf[20];
|
||
char *fname;
|
||
struct stat sb;
|
||
|
||
*r_fname = NULL;
|
||
|
||
domain = strchr (addrspec, '@');
|
||
if (!domain || !domain[1] || domain == addrspec)
|
||
return gpg_error (GPG_ERR_INV_ARG);
|
||
domain++;
|
||
|
||
gcry_md_hash_buffer (GCRY_MD_SHA1, sha1buf, addrspec, domain - addrspec - 1);
|
||
hash = zb32_encode (sha1buf, 8*20);
|
||
if (!hash)
|
||
return gpg_error_from_syserror ();
|
||
|
||
/* Try to create missing directories below opt.directory. */
|
||
fname = make_filename_try (opt.directory, domain, NULL);
|
||
if (fname && gnupg_stat (fname, &sb)
|
||
&& gpg_err_code_from_syserror () == GPG_ERR_ENOENT)
|
||
if (!gnupg_mkdir (fname, "-rwxr--r--") && opt.verbose)
|
||
log_info ("directory '%s' created\n", fname);
|
||
xfree (fname);
|
||
fname = make_filename_try (opt.directory, domain, "hu", NULL);
|
||
if (fname && gnupg_stat (fname, &sb)
|
||
&& gpg_err_code_from_syserror () == GPG_ERR_ENOENT)
|
||
if (!gnupg_mkdir (fname, "-rwxr--r--") && opt.verbose)
|
||
log_info ("directory '%s' created\n", fname);
|
||
xfree (fname);
|
||
|
||
/* Create the filename. */
|
||
fname = make_filename_try (opt.directory, domain, "hu", hash, NULL);
|
||
err = fname? 0 : gpg_error_from_syserror ();
|
||
|
||
if (err)
|
||
xfree (fname);
|
||
else
|
||
*r_fname = fname; /* Okay. */
|
||
xfree (hash);
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Make sure that a policy file exists for addrspec. Directories must
|
||
* already exist. */
|
||
static gpg_error_t
|
||
ensure_policy_file (const char *addrspec)
|
||
{
|
||
gpg_err_code_t ec;
|
||
gpg_error_t err;
|
||
const char *domain;
|
||
char *fname;
|
||
estream_t fp;
|
||
|
||
domain = strchr (addrspec, '@');
|
||
if (!domain || !domain[1] || domain == addrspec)
|
||
return gpg_error (GPG_ERR_INV_ARG);
|
||
domain++;
|
||
|
||
/* Create the filename. */
|
||
fname = make_filename_try (opt.directory, domain, "policy", NULL);
|
||
err = fname? 0 : gpg_error_from_syserror ();
|
||
if (err)
|
||
goto leave;
|
||
|
||
/* First a quick check whether it already exists. */
|
||
if (!(ec = gnupg_access (fname, F_OK)))
|
||
{
|
||
err = 0; /* File already exists. */
|
||
goto leave;
|
||
}
|
||
err = gpg_error (ec);
|
||
if (gpg_err_code (err) == GPG_ERR_ENOENT)
|
||
err = 0;
|
||
else
|
||
{
|
||
log_error ("domain %s: problem with '%s': %s\n",
|
||
domain, fname, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
/* Now create the file. */
|
||
fp = es_fopen (fname, "wxb");
|
||
if (!fp)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
if (gpg_err_code (err) == GPG_ERR_EEXIST)
|
||
err = 0; /* Was created between the gnupg_access() and es_fopen(). */
|
||
else
|
||
log_error ("domain %s: error creating '%s': %s\n",
|
||
domain, fname, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
es_fprintf (fp, "# Policy flags for domain %s\n", domain);
|
||
if (es_ferror (fp) || es_fclose (fp))
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error writing '%s': %s\n", fname, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
if (opt.verbose)
|
||
log_info ("policy file '%s' created\n", fname);
|
||
|
||
/* Make sure the policy file world readable. */
|
||
if (gnupg_chmod (fname, "-rw-r--r--"))
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("can't set permissions of '%s': %s\n",
|
||
fname, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
leave:
|
||
xfree (fname);
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Helper form wks_cmd_install_key. */
|
||
static gpg_error_t
|
||
install_key_from_spec_file (const char *fname)
|
||
{
|
||
gpg_error_t err;
|
||
estream_t fp;
|
||
char *line = NULL;
|
||
size_t linelen = 0;
|
||
size_t maxlen = 2048;
|
||
const char *fields[2];
|
||
unsigned int lnr = 0;
|
||
|
||
if (!fname || !strcmp (fname, ""))
|
||
fp = es_stdin;
|
||
else
|
||
fp = es_fopen (fname, "rb");
|
||
if (!fp)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error reading '%s': %s\n", fname, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
while (es_read_line (fp, &line, &linelen, &maxlen) > 0)
|
||
{
|
||
if (!maxlen)
|
||
{
|
||
err = gpg_error (GPG_ERR_LINE_TOO_LONG);
|
||
log_error ("error reading '%s': %s\n", fname, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
lnr++;
|
||
trim_spaces (line);
|
||
if (!*line || *line == '#')
|
||
continue;
|
||
if (split_fields (line, fields, DIM(fields)) < 2)
|
||
{
|
||
log_error ("error reading '%s': syntax error at line %u\n",
|
||
fname, lnr);
|
||
continue;
|
||
}
|
||
err = wks_cmd_install_key (fields[0], fields[1]);
|
||
if (err)
|
||
goto leave;
|
||
}
|
||
if (es_ferror (fp))
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error reading '%s': %s\n", fname, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
leave:
|
||
if (fp != es_stdin)
|
||
es_fclose (fp);
|
||
es_free (line);
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Install a single key into the WKD by reading FNAME and extracting
|
||
* USERID. If USERID is NULL FNAME is expected to be a list of fpr
|
||
* mbox lines and for each line the respective key will be
|
||
* installed. */
|
||
gpg_error_t
|
||
wks_cmd_install_key (const char *fname, const char *userid)
|
||
{
|
||
gpg_error_t err;
|
||
KEYDB_SEARCH_DESC desc;
|
||
estream_t fp = NULL;
|
||
char *addrspec = NULL;
|
||
char *fpr = NULL;
|
||
uidinfo_list_t uidlist = NULL;
|
||
uidinfo_list_t uid, thisuid;
|
||
time_t thistime;
|
||
char *huname = NULL;
|
||
int any;
|
||
|
||
if (!userid)
|
||
return install_key_from_spec_file (fname);
|
||
|
||
addrspec = mailbox_from_userid (userid, 0);
|
||
if (!addrspec)
|
||
{
|
||
log_error ("\"%s\" is not a proper mail address\n", userid);
|
||
err = gpg_error (GPG_ERR_INV_USER_ID);
|
||
goto leave;
|
||
}
|
||
|
||
if (!classify_user_id (fname, &desc, 1)
|
||
&& desc.mode == KEYDB_SEARCH_MODE_FPR)
|
||
{
|
||
/* FNAME looks like a fingerprint. Get the key from the
|
||
* standard keyring. */
|
||
err = wks_get_key (&fp, fname, addrspec, 0);
|
||
if (err)
|
||
{
|
||
log_error ("error getting key '%s' (uid='%s'): %s\n",
|
||
fname, addrspec, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
}
|
||
else /* Take it from the file */
|
||
{
|
||
fp = es_fopen (fname, "rb");
|
||
if (!fp)
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
log_error ("error reading '%s': %s\n", fname, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
}
|
||
|
||
/* List the key so that we can figure out the newest UID with the
|
||
* requested addrspec. */
|
||
err = wks_list_key (fp, &fpr, &uidlist);
|
||
if (err)
|
||
{
|
||
log_error ("error parsing key: %s\n", gpg_strerror (err));
|
||
err = gpg_error (GPG_ERR_NO_PUBKEY);
|
||
goto leave;
|
||
}
|
||
thistime = 0;
|
||
thisuid = NULL;
|
||
any = 0;
|
||
for (uid = uidlist; uid; uid = uid->next)
|
||
{
|
||
if (!uid->mbox)
|
||
continue; /* Should not happen anyway. */
|
||
if (ascii_strcasecmp (uid->mbox, addrspec))
|
||
continue; /* Not the requested addrspec. */
|
||
any = 1;
|
||
if (uid->created > thistime)
|
||
{
|
||
thistime = uid->created;
|
||
thisuid = uid;
|
||
}
|
||
}
|
||
if (!thisuid)
|
||
thisuid = uidlist; /* This is the case for a missing timestamp. */
|
||
if (!any)
|
||
{
|
||
log_error ("public key in '%s' has no mail address '%s'\n",
|
||
fname, addrspec);
|
||
err = gpg_error (GPG_ERR_INV_USER_ID);
|
||
goto leave;
|
||
}
|
||
|
||
if (opt.verbose)
|
||
log_info ("using key with user id '%s'\n", thisuid->uid);
|
||
|
||
{
|
||
estream_t fp2;
|
||
|
||
es_rewind (fp);
|
||
err = wks_filter_uid (&fp2, fp, thisuid->uid, 1);
|
||
if (err)
|
||
{
|
||
log_error ("error filtering key: %s\n", gpg_strerror (err));
|
||
err = gpg_error (GPG_ERR_NO_PUBKEY);
|
||
goto leave;
|
||
}
|
||
es_fclose (fp);
|
||
fp = fp2;
|
||
}
|
||
|
||
/* Hash user ID and create filename. */
|
||
err = wks_compute_hu_fname (&huname, addrspec);
|
||
if (err)
|
||
goto leave;
|
||
|
||
/* Now that wks_compute_hu_fname has created missing directories we
|
||
* can create a policy file if it does not exist. */
|
||
err = ensure_policy_file (addrspec);
|
||
if (err)
|
||
goto leave;
|
||
|
||
/* Publish. */
|
||
err = write_to_file (fp, huname);
|
||
if (err)
|
||
{
|
||
log_error ("copying key to '%s' failed: %s\n", huname,gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
/* Make sure it is world readable. */
|
||
if (gnupg_chmod (huname, "-rw-r--r--"))
|
||
log_error ("can't set permissions of '%s': %s\n",
|
||
huname, gpg_strerror (gpg_err_code_from_syserror()));
|
||
|
||
if (!opt.quiet)
|
||
log_info ("key %s published for '%s'\n", fpr, addrspec);
|
||
|
||
|
||
leave:
|
||
xfree (huname);
|
||
free_uidinfo_list (uidlist);
|
||
xfree (fpr);
|
||
xfree (addrspec);
|
||
es_fclose (fp);
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Remove the key with mail address in USERID. */
|
||
gpg_error_t
|
||
wks_cmd_remove_key (const char *userid)
|
||
{
|
||
gpg_error_t err;
|
||
char *addrspec = NULL;
|
||
char *fname = NULL;
|
||
|
||
err = wks_fname_from_userid (userid, 0, &fname, &addrspec);
|
||
if (err)
|
||
goto leave;
|
||
|
||
if (gnupg_remove (fname))
|
||
{
|
||
err = gpg_error_from_syserror ();
|
||
if (gpg_err_code (err) == GPG_ERR_ENOENT)
|
||
{
|
||
if (!opt.quiet)
|
||
log_info ("key for '%s' is not installed\n", addrspec);
|
||
log_inc_errorcount ();
|
||
err = 0;
|
||
}
|
||
else
|
||
log_error ("error removing '%s': %s\n", fname, gpg_strerror (err));
|
||
goto leave;
|
||
}
|
||
|
||
if (opt.verbose)
|
||
log_info ("key for '%s' removed\n", addrspec);
|
||
err = 0;
|
||
|
||
leave:
|
||
xfree (fname);
|
||
xfree (addrspec);
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Print the WKD hash for the user id to stdout. */
|
||
gpg_error_t
|
||
wks_cmd_print_wkd_hash (const char *userid)
|
||
{
|
||
gpg_error_t err;
|
||
char *addrspec, *fname;
|
||
|
||
err = wks_fname_from_userid (userid, 1, &fname, &addrspec);
|
||
if (err)
|
||
return err;
|
||
|
||
es_printf ("%s %s\n", fname, addrspec);
|
||
|
||
xfree (fname);
|
||
xfree (addrspec);
|
||
return err;
|
||
}
|
||
|
||
|
||
/* Print the WKD URL for the user id to stdout. */
|
||
gpg_error_t
|
||
wks_cmd_print_wkd_url (const char *userid)
|
||
{
|
||
gpg_error_t err;
|
||
char *addrspec, *fname;
|
||
char *domain;
|
||
|
||
err = wks_fname_from_userid (userid, 1, &fname, &addrspec);
|
||
if (err)
|
||
return err;
|
||
|
||
domain = strchr (addrspec, '@');
|
||
if (domain)
|
||
*domain++ = 0;
|
||
|
||
es_printf ("https://openpgpkey.%s/.well-known/openpgpkey/%s/hu/%s?l=%s\n",
|
||
domain, domain, fname, addrspec);
|
||
|
||
xfree (fname);
|
||
xfree (addrspec);
|
||
return err;
|
||
}
|