jcs.org
mutt stable branch with some hacks
1/*
2 * Copyright (C) 1996-1997,2007 Michael R. Elkins <me@mutt.org>
3 * Copyright (c) 1998-2003 Thomas Roessler <roessler@does-not-exist.org>
4 *
5 * This program is free software; you can redistribute it
6 * and/or modify it under the terms of the GNU General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later
9 * version.
10 *
11 * This program is distributed in the hope that it will be
12 * useful, but WITHOUT ANY WARRANTY; without even the implied
13 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
14 * PURPOSE. See the GNU General Public License for more
15 * details.
16 *
17 * You should have received a copy of the GNU General Public
18 * License along with this program; if not, write to the Free
19 * Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 */
22
23#if HAVE_CONFIG_H
24# include "config.h"
25#endif
26
27#include "mutt.h"
28#include "mutt_curses.h"
29#include "mutt_menu.h"
30#include "mime.h"
31#include "pgp.h"
32#include "pager.h"
33#include "sort.h"
34
35#include <string.h>
36#include <ctype.h>
37#include <stdlib.h>
38#include <unistd.h>
39#include <sys/stat.h>
40#include <sys/wait.h>
41
42#include <locale.h>
43
44#ifdef CRYPT_BACKEND_CLASSIC_PGP
45
46struct pgp_cache
47{
48 char *what;
49 char *dflt;
50 struct pgp_cache *next;
51};
52
53static struct pgp_cache *id_defaults = NULL;
54
55static const char trust_flags[] = "?- +";
56
57static char *pgp_key_abilities (int flags)
58{
59 static char buff[3];
60
61 if (!(flags & KEYFLAG_CANENCRYPT))
62 buff[0] = '-';
63 else if (flags & KEYFLAG_PREFER_SIGNING)
64 buff[0] = '.';
65 else
66 buff[0] = 'e';
67
68 if (!(flags & KEYFLAG_CANSIGN))
69 buff[1] = '-';
70 else if (flags & KEYFLAG_PREFER_ENCRYPTION)
71 buff[1] = '.';
72 else
73 buff[1] = 's';
74
75 buff[2] = '\0';
76
77 return buff;
78}
79
80static char pgp_flags (int flags)
81{
82 if (flags & KEYFLAG_REVOKED)
83 return 'R';
84 else if (flags & KEYFLAG_EXPIRED)
85 return 'X';
86 else if (flags & KEYFLAG_DISABLED)
87 return 'd';
88 else if (flags & KEYFLAG_CRITICAL)
89 return 'c';
90 else
91 return ' ';
92}
93
94static pgp_key_t pgp_principal_key (pgp_key_t key)
95{
96 if (key->flags & KEYFLAG_SUBKEY && key->parent)
97 return key->parent;
98 else
99 return key;
100}
101
102/*
103 * Format an entry on the PGP key selection menu.
104 *
105 * %n number
106 * %k key id %K key id of the principal key
107 * %u user id
108 * %a algorithm %A algorithm of the princ. key
109 * %l length %L length of the princ. key
110 * %f flags %F flags of the princ. key
111 * %c capabilities %C capabilities of the princ. key
112 * %t trust/validity of the key-uid association
113 * %[...] date of key using strftime(3)
114 */
115
116typedef struct pgp_entry
117{
118 size_t num;
119 pgp_uid_t *uid;
120} pgp_entry_t;
121
122static const char *pgp_entry_fmt (char *dest,
123 size_t destlen,
124 size_t col,
125 int cols,
126 char op,
127 const char *src,
128 const char *prefix,
129 const char *ifstring,
130 const char *elsestring,
131 unsigned long data,
132 format_flag flags)
133{
134 char fmt[16];
135 pgp_entry_t *entry;
136 pgp_uid_t *uid;
137 pgp_key_t key, pkey;
138 int kflags = 0;
139 int optional = (flags & MUTT_FORMAT_OPTIONAL);
140
141 entry = (pgp_entry_t *) data;
142 uid = entry->uid;
143 key = uid->parent;
144 pkey = pgp_principal_key (key);
145
146 if (isupper ((unsigned char) op))
147 key = pkey;
148
149 kflags = key->flags | (pkey->flags & KEYFLAG_RESTRICTIONS)
150 | uid->flags;
151
152 switch (ascii_tolower (op))
153 {
154 case '[':
155
156 {
157 const char *cp;
158 char buf2[SHORT_STRING], *p;
159 int do_locales;
160 struct tm *tm;
161 size_t len;
162
163 p = dest;
164
165 cp = src;
166 if (*cp == '!')
167 {
168 do_locales = 0;
169 cp++;
170 }
171 else
172 do_locales = 1;
173
174 len = destlen - 1;
175 while (len > 0 && *cp != ']')
176 {
177 if (*cp == '%')
178 {
179 cp++;
180 if (len >= 2)
181 {
182 *p++ = '%';
183 *p++ = *cp;
184 len -= 2;
185 }
186 else
187 break; /* not enough space */
188 cp++;
189 }
190 else
191 {
192 *p++ = *cp++;
193 len--;
194 }
195 }
196 *p = 0;
197
198
199 tm = localtime (&key->gen_time);
200
201 if (!do_locales)
202 setlocale (LC_TIME, "C");
203 strftime (buf2, sizeof (buf2), dest, tm);
204 if (!do_locales)
205 setlocale (LC_TIME, "");
206
207 snprintf (fmt, sizeof (fmt), "%%%ss", prefix);
208 snprintf (dest, destlen, fmt, buf2);
209 if (len > 0)
210 src = cp + 1;
211 }
212 break;
213 case 'n':
214 if (!optional)
215 {
216 snprintf (fmt, sizeof (fmt), "%%%sd", prefix);
217 snprintf (dest, destlen, fmt, entry->num);
218 }
219 break;
220 case 'k':
221 if (!optional)
222 {
223 snprintf (fmt, sizeof (fmt), "%%%ss", prefix);
224 snprintf (dest, destlen, fmt, _pgp_keyid (key));
225 }
226 break;
227 case 'u':
228 if (!optional)
229 {
230 snprintf (fmt, sizeof (fmt), "%%%ss", prefix);
231 snprintf (dest, destlen, fmt, NONULL (uid->addr));
232 }
233 break;
234 case 'a':
235 if (!optional)
236 {
237 snprintf (fmt, sizeof (fmt), "%%%ss", prefix);
238 snprintf (dest, destlen, fmt, key->algorithm);
239 }
240 break;
241 case 'l':
242 if (!optional)
243 {
244 snprintf (fmt, sizeof (fmt), "%%%sd", prefix);
245 snprintf (dest, destlen, fmt, key->keylen);
246 }
247 break;
248 case 'f':
249 if (!optional)
250 {
251 snprintf (fmt, sizeof (fmt), "%%%sc", prefix);
252 snprintf (dest, destlen, fmt, pgp_flags (kflags));
253 }
254 else if (!(kflags & (KEYFLAG_RESTRICTIONS)))
255 optional = 0;
256 break;
257 case 'c':
258 if (!optional)
259 {
260 snprintf (fmt, sizeof (fmt), "%%%ss", prefix);
261 snprintf (dest, destlen, fmt, pgp_key_abilities (kflags));
262 }
263 else if (!(kflags & (KEYFLAG_ABILITIES)))
264 optional = 0;
265 break;
266 case 't':
267 if (!optional)
268 {
269 snprintf (fmt, sizeof (fmt), "%%%sc", prefix);
270 snprintf (dest, destlen, fmt, trust_flags[uid->trust & 0x03]);
271 }
272 else if (!(uid->trust & 0x03))
273 /* undefined trust */
274 optional = 0;
275 break;
276 default:
277 *dest = '\0';
278 }
279
280 if (optional)
281 mutt_FormatString (dest, destlen, col, cols, ifstring, mutt_attach_fmt, data, 0);
282 else if (flags & MUTT_FORMAT_OPTIONAL)
283 mutt_FormatString (dest, destlen, col, cols, elsestring, mutt_attach_fmt, data, 0);
284 return (src);
285}
286
287static void pgp_entry (char *s, size_t l, MUTTMENU * menu, int num)
288{
289 pgp_uid_t **KeyTable = (pgp_uid_t **) menu->data;
290 pgp_entry_t entry;
291
292 entry.uid = KeyTable[num];
293 entry.num = num + 1;
294
295 mutt_FormatString (s, l, 0, MuttIndexWindow->cols, NONULL (PgpEntryFormat), pgp_entry_fmt,
296 (unsigned long) &entry, MUTT_FORMAT_ARROWCURSOR);
297}
298
299static int _pgp_compare_address (const void *a, const void *b)
300{
301 int r;
302
303 pgp_uid_t **s = (pgp_uid_t **) a;
304 pgp_uid_t **t = (pgp_uid_t **) b;
305
306 if ((r = mutt_strcasecmp ((*s)->addr, (*t)->addr)))
307 return r > 0;
308 else
309 return (mutt_strcasecmp (pgp_fpr_or_lkeyid ((*s)->parent),
310 pgp_fpr_or_lkeyid ((*t)->parent)) > 0);
311}
312
313static int pgp_compare_address (const void *a, const void *b)
314{
315 return ((PgpSortKeys & SORT_REVERSE) ? !_pgp_compare_address (a, b)
316 : _pgp_compare_address (a, b));
317}
318
319
320
321static int _pgp_compare_keyid (const void *a, const void *b)
322{
323 int r;
324
325 pgp_uid_t **s = (pgp_uid_t **) a;
326 pgp_uid_t **t = (pgp_uid_t **) b;
327
328 if ((r = mutt_strcasecmp (pgp_fpr_or_lkeyid ((*s)->parent),
329 pgp_fpr_or_lkeyid ((*t)->parent))))
330 return r > 0;
331 else
332 return (mutt_strcasecmp ((*s)->addr, (*t)->addr)) > 0;
333}
334
335static int pgp_compare_keyid (const void *a, const void *b)
336{
337 return ((PgpSortKeys & SORT_REVERSE) ? !_pgp_compare_keyid (a, b)
338 : _pgp_compare_keyid (a, b));
339}
340
341static int _pgp_compare_date (const void *a, const void *b)
342{
343 int r;
344 pgp_uid_t **s = (pgp_uid_t **) a;
345 pgp_uid_t **t = (pgp_uid_t **) b;
346
347 if ((r = ((*s)->parent->gen_time - (*t)->parent->gen_time)))
348 return r > 0;
349 return (mutt_strcasecmp ((*s)->addr, (*t)->addr)) > 0;
350}
351
352static int pgp_compare_date (const void *a, const void *b)
353{
354 return ((PgpSortKeys & SORT_REVERSE) ? !_pgp_compare_date (a, b)
355 : _pgp_compare_date (a, b));
356}
357
358static int _pgp_compare_trust (const void *a, const void *b)
359{
360 int r;
361
362 pgp_uid_t **s = (pgp_uid_t **) a;
363 pgp_uid_t **t = (pgp_uid_t **) b;
364
365 if ((r = (((*s)->parent->flags & (KEYFLAG_RESTRICTIONS))
366 - ((*t)->parent->flags & (KEYFLAG_RESTRICTIONS)))))
367 return r > 0;
368 if ((r = ((*s)->trust - (*t)->trust)))
369 return r < 0;
370 if ((r = ((*s)->parent->keylen - (*t)->parent->keylen)))
371 return r < 0;
372 if ((r = ((*s)->parent->gen_time - (*t)->parent->gen_time)))
373 return r < 0;
374 if ((r = mutt_strcasecmp ((*s)->addr, (*t)->addr)))
375 return r > 0;
376 return (mutt_strcasecmp (pgp_fpr_or_lkeyid ((*s)->parent),
377 pgp_fpr_or_lkeyid ((*t)->parent))) > 0;
378}
379
380static int pgp_compare_trust (const void *a, const void *b)
381{
382 return ((PgpSortKeys & SORT_REVERSE) ? !_pgp_compare_trust (a, b)
383 : _pgp_compare_trust (a, b));
384}
385
386static int pgp_key_is_valid (pgp_key_t k)
387{
388 pgp_key_t pk = pgp_principal_key (k);
389 if (k->flags & KEYFLAG_CANTUSE)
390 return 0;
391 if (pk->flags & KEYFLAG_CANTUSE)
392 return 0;
393
394 return 1;
395}
396
397static int pgp_id_is_strong (pgp_uid_t *uid)
398{
399 if ((uid->trust & 3) < 3)
400 return 0;
401 /* else */
402 return 1;
403}
404
405static int pgp_id_is_valid (pgp_uid_t *uid)
406{
407 if (!pgp_key_is_valid (uid->parent))
408 return 0;
409 if (uid->flags & KEYFLAG_CANTUSE)
410 return 0;
411 /* else */
412 return 1;
413}
414
415#define PGP_KV_VALID 1
416#define PGP_KV_ADDR 2
417#define PGP_KV_STRING 4
418#define PGP_KV_STRONGID 8
419
420#define PGP_KV_MATCH (PGP_KV_ADDR|PGP_KV_STRING)
421
422static int pgp_id_matches_addr (ADDRESS *addr, ADDRESS *u_addr, pgp_uid_t *uid)
423{
424 int rv = 0;
425
426 if (pgp_id_is_valid (uid))
427 rv |= PGP_KV_VALID;
428
429 if (pgp_id_is_strong (uid))
430 rv |= PGP_KV_STRONGID;
431
432 if (addr->mailbox && u_addr->mailbox
433 && mutt_strcasecmp (addr->mailbox, u_addr->mailbox) == 0)
434 rv |= PGP_KV_ADDR;
435
436 if (addr->personal && u_addr->personal
437 && mutt_strcasecmp (addr->personal, u_addr->personal) == 0)
438 rv |= PGP_KV_STRING;
439
440 return rv;
441}
442
443static pgp_key_t pgp_select_key (pgp_key_t keys,
444 ADDRESS * p, const char *s)
445{
446 int keymax;
447 pgp_uid_t **KeyTable;
448 MUTTMENU *menu;
449 int i, done = 0;
450 char helpstr[LONG_STRING], buf[LONG_STRING], tmpbuf[STRING];
451 char cmd[LONG_STRING], tempfile[_POSIX_PATH_MAX];
452 FILE *fp, *devnull;
453 pid_t thepid;
454 pgp_key_t kp;
455 pgp_uid_t *a;
456 int (*f) (const void *, const void *);
457
458 int unusable = 0;
459
460 keymax = 0;
461 KeyTable = NULL;
462
463 for (i = 0, kp = keys; kp; kp = kp->next)
464 {
465 if (!option (OPTPGPSHOWUNUSABLE) && (kp->flags & KEYFLAG_CANTUSE))
466 {
467 unusable = 1;
468 continue;
469 }
470
471 for (a = kp->address; a; a = a->next)
472 {
473 if (!option (OPTPGPSHOWUNUSABLE) && (a->flags & KEYFLAG_CANTUSE))
474 {
475 unusable = 1;
476 continue;
477 }
478
479 if (i == keymax)
480 {
481 keymax += 5;
482 safe_realloc (&KeyTable, sizeof (pgp_uid_t *) * keymax);
483 }
484
485 KeyTable[i++] = a;
486 }
487 }
488
489 if (!i && unusable)
490 {
491 mutt_error _("All matching keys are expired, revoked, or disabled.");
492 mutt_sleep (1);
493 return NULL;
494 }
495
496 switch (PgpSortKeys & SORT_MASK)
497 {
498 case SORT_DATE:
499 f = pgp_compare_date;
500 break;
501 case SORT_KEYID:
502 f = pgp_compare_keyid;
503 break;
504 case SORT_ADDRESS:
505 f = pgp_compare_address;
506 break;
507 case SORT_TRUST:
508 default:
509 f = pgp_compare_trust;
510 break;
511 }
512 qsort (KeyTable, i, sizeof (pgp_uid_t *), f);
513
514 helpstr[0] = 0;
515 mutt_make_help (buf, sizeof (buf), _("Exit "), MENU_PGP, OP_EXIT);
516 strcat (helpstr, buf); /* __STRCAT_CHECKED__ */
517 mutt_make_help (buf, sizeof (buf), _("Select "), MENU_PGP,
518 OP_GENERIC_SELECT_ENTRY);
519 strcat (helpstr, buf); /* __STRCAT_CHECKED__ */
520 mutt_make_help (buf, sizeof (buf), _("Check key "), MENU_PGP, OP_VERIFY_KEY);
521 strcat (helpstr, buf); /* __STRCAT_CHECKED__ */
522 mutt_make_help (buf, sizeof (buf), _("Help"), MENU_PGP, OP_HELP);
523 strcat (helpstr, buf); /* __STRCAT_CHECKED__ */
524
525 menu = mutt_new_menu (MENU_PGP);
526 menu->max = i;
527 menu->make_entry = pgp_entry;
528 menu->help = helpstr;
529 menu->data = KeyTable;
530
531 if (p)
532 snprintf (buf, sizeof (buf), _("PGP keys matching <%s>."), p->mailbox);
533 else
534 snprintf (buf, sizeof (buf), _("PGP keys matching \"%s\"."), s);
535
536
537 menu->title = buf;
538
539 kp = NULL;
540
541 mutt_clear_error ();
542
543 while (!done)
544 {
545 switch (mutt_menuLoop (menu))
546 {
547
548 case OP_VERIFY_KEY:
549
550 mutt_mktemp (tempfile, sizeof (tempfile));
551 if ((devnull = fopen ("/dev/null", "w")) == NULL) /* __FOPEN_CHECKED__ */
552 {
553 mutt_perror _("Can't open /dev/null");
554 break;
555 }
556 if ((fp = safe_fopen (tempfile, "w")) == NULL)
557 {
558 safe_fclose (&devnull);
559 mutt_perror _("Can't create temporary file");
560 break;
561 }
562
563 mutt_message _("Invoking PGP...");
564
565 snprintf (tmpbuf, sizeof (tmpbuf), "0x%s",
566 pgp_fpr_or_lkeyid (pgp_principal_key (KeyTable[menu->current]->parent)));
567
568 if ((thepid = pgp_invoke_verify_key (NULL, NULL, NULL, -1,
569 fileno (fp), fileno (devnull), tmpbuf)) == -1)
570 {
571 mutt_perror _("Can't create filter");
572 unlink (tempfile);
573 safe_fclose (&fp);
574 safe_fclose (&devnull);
575 }
576
577 mutt_wait_filter (thepid);
578 safe_fclose (&fp);
579 safe_fclose (&devnull);
580 mutt_clear_error ();
581 snprintf (cmd, sizeof (cmd), _("Key ID: 0x%s"),
582 pgp_keyid (pgp_principal_key (KeyTable[menu->current]->parent)));
583 mutt_do_pager (cmd, tempfile, 0, NULL);
584 menu->redraw = REDRAW_FULL;
585
586 break;
587
588 case OP_VIEW_ID:
589
590 mutt_message ("%s", NONULL (KeyTable[menu->current]->addr));
591 break;
592
593 case OP_GENERIC_SELECT_ENTRY:
594
595
596 /* XXX make error reporting more verbose */
597
598 if (option (OPTPGPCHECKTRUST))
599 if (!pgp_key_is_valid (KeyTable[menu->current]->parent))
600 {
601 mutt_error _("This key can't be used: expired/disabled/revoked.");
602 break;
603 }
604
605 if (option (OPTPGPCHECKTRUST) &&
606 (!pgp_id_is_valid (KeyTable[menu->current])
607 || !pgp_id_is_strong (KeyTable[menu->current])))
608 {
609 char *s = "";
610 char buff[LONG_STRING];
611
612 if (KeyTable[menu->current]->flags & KEYFLAG_CANTUSE)
613 s = N_("ID is expired/disabled/revoked.");
614 else switch (KeyTable[menu->current]->trust & 0x03)
615 {
616 case 0:
617 s = N_("ID has undefined validity.");
618 break;
619 case 1:
620 s = N_("ID is not valid.");
621 break;
622 case 2:
623 s = N_("ID is only marginally valid.");
624 break;
625 }
626
627 snprintf (buff, sizeof (buff), _("%s Do you really want to use the key?"),
628 _(s));
629
630 if (mutt_yesorno (buff, MUTT_NO) != MUTT_YES)
631 {
632 mutt_clear_error ();
633 break;
634 }
635 }
636
637# if 0
638 kp = pgp_principal_key (KeyTable[menu->current]->parent);
639# else
640 kp = KeyTable[menu->current]->parent;
641# endif
642 done = 1;
643 break;
644
645 case OP_EXIT:
646
647 kp = NULL;
648 done = 1;
649 break;
650 }
651 }
652
653 mutt_menuDestroy (&menu);
654 FREE (&KeyTable);
655
656 set_option (OPTNEEDREDRAW);
657
658 return (kp);
659}
660
661pgp_key_t pgp_ask_for_key (char *tag, char *whatfor,
662 short abilities, pgp_ring_t keyring)
663{
664 pgp_key_t key;
665 char resp[SHORT_STRING];
666 struct pgp_cache *l = NULL;
667
668 mutt_clear_error ();
669
670 resp[0] = 0;
671 if (whatfor)
672 {
673
674 for (l = id_defaults; l; l = l->next)
675 if (!mutt_strcasecmp (whatfor, l->what))
676 {
677 strfcpy (resp, NONULL (l->dflt), sizeof (resp));
678 break;
679 }
680 }
681
682
683 FOREVER
684 {
685 resp[0] = 0;
686 if (mutt_get_field (tag, resp, sizeof (resp), MUTT_CLEAR) != 0)
687 return NULL;
688
689 if (whatfor)
690 {
691 if (l)
692 mutt_str_replace (&l->dflt, resp);
693 else
694 {
695 l = safe_malloc (sizeof (struct pgp_cache));
696 l->next = id_defaults;
697 id_defaults = l;
698 l->what = safe_strdup (whatfor);
699 l->dflt = safe_strdup (resp);
700 }
701 }
702
703 if ((key = pgp_getkeybystr (resp, abilities, keyring)))
704 return key;
705
706 BEEP ();
707 }
708 /* not reached */
709}
710
711/* generate a public key attachment */
712
713BODY *pgp_make_key_attachment (char *tempf)
714{
715 BODY *att;
716 char buff[LONG_STRING];
717 char tempfb[_POSIX_PATH_MAX], tmp[STRING];
718 FILE *tempfp;
719 FILE *devnull;
720 struct stat sb;
721 pid_t thepid;
722 pgp_key_t key;
723 unset_option (OPTPGPCHECKTRUST);
724
725 key = pgp_ask_for_key (_("Please enter the key ID: "), NULL, 0, PGP_PUBRING);
726
727 if (!key) return NULL;
728
729 snprintf (tmp, sizeof (tmp), "0x%s", pgp_fpr_or_lkeyid (pgp_principal_key (key)));
730 pgp_free_key (&key);
731
732 if (!tempf)
733 {
734 mutt_mktemp (tempfb, sizeof (tempfb));
735 tempf = tempfb;
736 }
737
738 if ((tempfp = safe_fopen (tempf, tempf == tempfb ? "w" : "a")) == NULL)
739 {
740 mutt_perror _("Can't create temporary file");
741 return NULL;
742 }
743
744 if ((devnull = fopen ("/dev/null", "w")) == NULL) /* __FOPEN_CHECKED__ */
745 {
746 mutt_perror _("Can't open /dev/null");
747 safe_fclose (&tempfp);
748 if (tempf == tempfb)
749 unlink (tempf);
750 return NULL;
751 }
752
753 mutt_message _("Invoking PGP...");
754
755
756 if ((thepid =
757 pgp_invoke_export (NULL, NULL, NULL, -1,
758 fileno (tempfp), fileno (devnull), tmp)) == -1)
759 {
760 mutt_perror _("Can't create filter");
761 unlink (tempf);
762 safe_fclose (&tempfp);
763 safe_fclose (&devnull);
764 return NULL;
765 }
766
767 mutt_wait_filter (thepid);
768
769 safe_fclose (&tempfp);
770 safe_fclose (&devnull);
771
772 att = mutt_new_body ();
773 att->filename = safe_strdup (tempf);
774 att->unlink = 1;
775 att->use_disp = 0;
776 att->type = TYPEAPPLICATION;
777 att->subtype = safe_strdup ("pgp-keys");
778 snprintf (buff, sizeof (buff), _("PGP Key %s."), tmp);
779 att->description = safe_strdup (buff);
780 mutt_update_encoding (att);
781
782 stat (tempf, &sb);
783 att->length = sb.st_size;
784
785 return att;
786}
787
788static LIST *pgp_add_string_to_hints (LIST *hints, const char *str)
789{
790 char *scratch;
791 char *t;
792
793 if ((scratch = safe_strdup (str)) == NULL)
794 return hints;
795
796 for (t = strtok (scratch, " ,.:\"()<>\n"); t;
797 t = strtok (NULL, " ,.:\"()<>\n"))
798 {
799 if (strlen (t) > 3)
800 hints = mutt_add_list (hints, t);
801 }
802
803 FREE (&scratch);
804 return hints;
805}
806
807static pgp_key_t *pgp_get_lastp (pgp_key_t p)
808{
809 for (; p; p = p->next)
810 if (!p->next)
811 return &p->next;
812
813 return NULL;
814}
815
816pgp_key_t pgp_getkeybyaddr (ADDRESS * a, short abilities, pgp_ring_t keyring,
817 int oppenc_mode)
818{
819 ADDRESS *r, *p;
820 LIST *hints = NULL;
821
822 int multi = 0;
823 int match;
824
825 pgp_key_t keys, k, kn;
826 pgp_key_t the_strong_valid_key = NULL;
827 pgp_key_t a_valid_addrmatch_key = NULL;
828 pgp_key_t matches = NULL;
829 pgp_key_t *last = &matches;
830 pgp_uid_t *q;
831
832 if (a && a->mailbox)
833 hints = pgp_add_string_to_hints (hints, a->mailbox);
834 if (a && a->personal)
835 hints = pgp_add_string_to_hints (hints, a->personal);
836
837 if (! oppenc_mode )
838 mutt_message (_("Looking for keys matching \"%s\"..."), a->mailbox);
839 keys = pgp_get_candidates (keyring, hints);
840
841 mutt_free_list (&hints);
842
843 if (!keys)
844 return NULL;
845
846 dprint (5, (debugfile, "pgp_getkeybyaddr: looking for %s <%s>.",
847 a->personal, a->mailbox));
848
849
850 for (k = keys; k; k = kn)
851 {
852 kn = k->next;
853
854 dprint (5, (debugfile, " looking at key: %s\n",
855 pgp_keyid (k)));
856
857 if (abilities && !(k->flags & abilities))
858 {
859 dprint (5, (debugfile, " insufficient abilities: Has %x, want %x\n",
860 k->flags, abilities));
861 continue;
862 }
863
864 match = 0; /* any match */
865
866 for (q = k->address; q; q = q->next)
867 {
868 r = rfc822_parse_adrlist (NULL, NONULL (q->addr));
869
870 for (p = r; p; p = p->next)
871 {
872 int validity = pgp_id_matches_addr (a, p, q);
873
874 if (validity & PGP_KV_MATCH) /* something matches */
875 match = 1;
876
877 if ((validity & PGP_KV_VALID)
878 && (validity & PGP_KV_ADDR))
879 {
880 if (validity & PGP_KV_STRONGID)
881 {
882 if (the_strong_valid_key && the_strong_valid_key != k)
883 multi = 1;
884 the_strong_valid_key = k;
885 }
886 else
887 {
888 a_valid_addrmatch_key = k;
889 }
890 }
891 }
892
893 rfc822_free_address (&r);
894 }
895
896 if (match)
897 {
898 *last = pgp_principal_key (k);
899 kn = pgp_remove_key (&keys, *last);
900 last = pgp_get_lastp (k);
901 }
902 }
903
904 pgp_free_key (&keys);
905
906 if (matches)
907 {
908 if (oppenc_mode)
909 {
910 if (the_strong_valid_key)
911 {
912 pgp_remove_key (&matches, the_strong_valid_key);
913 k = the_strong_valid_key;
914 }
915 else if (a_valid_addrmatch_key)
916 {
917 pgp_remove_key (&matches, a_valid_addrmatch_key);
918 k = a_valid_addrmatch_key;
919 }
920 else
921 k = NULL;
922 }
923 else if (the_strong_valid_key && !multi)
924 {
925 /*
926 * There was precisely one strong match on a valid ID.
927 *
928 * Proceed without asking the user.
929 */
930 pgp_remove_key (&matches, the_strong_valid_key);
931 k = the_strong_valid_key;
932 }
933 else
934 {
935 /*
936 * Else: Ask the user.
937 */
938 if ((k = pgp_select_key (matches, a, NULL)))
939 pgp_remove_key (&matches, k);
940 }
941
942 pgp_free_key (&matches);
943
944 return k;
945 }
946
947 return NULL;
948}
949
950pgp_key_t pgp_getkeybystr (char *p, short abilities, pgp_ring_t keyring)
951{
952 LIST *hints = NULL;
953 pgp_key_t keys;
954 pgp_key_t matches = NULL;
955 pgp_key_t *last = &matches;
956 pgp_key_t k, kn;
957 pgp_uid_t *a;
958 short match;
959 size_t l;
960 const char *ps, *pl, *pfcopy, *phint;
961
962 if ((l = mutt_strlen (p)) && p[l-1] == '!')
963 p[l-1] = 0;
964
965 mutt_message (_("Looking for keys matching \"%s\"..."), p);
966
967 pfcopy = crypt_get_fingerprint_or_id (p, &phint, &pl, &ps);
968 hints = pgp_add_string_to_hints (hints, phint);
969 keys = pgp_get_candidates (keyring, hints);
970 mutt_free_list (&hints);
971
972 if (!keys)
973 goto out;
974
975 for (k = keys; k; k = kn)
976 {
977 kn = k->next;
978 if (abilities && !(k->flags & abilities))
979 continue;
980
981 /* This shouldn't happen, but keys without any addresses aren't selectable
982 * in pgp_select_key().
983 */
984 if (!k->address)
985 continue;
986
987 match = 0;
988
989 dprint (5, (debugfile, "pgp_getkeybystr: matching \"%s\" against key %s:\n",
990 p, pgp_long_keyid (k)));
991
992 if (!*p ||
993 (pfcopy && mutt_strcasecmp (pfcopy, k->fingerprint) == 0) ||
994 (pl && mutt_strcasecmp (pl, pgp_long_keyid (k)) == 0) ||
995 (ps && mutt_strcasecmp (ps, pgp_short_keyid (k)) == 0))
996 {
997 dprint (5, (debugfile, "\t\tmatch.\n"));
998 match = 1;
999 }
1000 else
1001 {
1002 for (a = k->address; a; a = a->next)
1003 {
1004 dprint (5, (debugfile, "pgp_getkeybystr: matching \"%s\" against key %s, \"%s\":\n",
1005 p, pgp_long_keyid (k), NONULL (a->addr)));
1006 if (mutt_stristr (a->addr, p))
1007 {
1008 dprint (5, (debugfile, "\t\tmatch.\n"));
1009 match = 1;
1010 break;
1011 }
1012 }
1013 }
1014
1015 if (match)
1016 {
1017 *last = pgp_principal_key (k);
1018 kn = pgp_remove_key (&keys, *last);
1019 last = pgp_get_lastp (k);
1020 }
1021 }
1022
1023 pgp_free_key (&keys);
1024
1025 if (matches)
1026 {
1027 if ((k = pgp_select_key (matches, NULL, p)))
1028 pgp_remove_key (&matches, k);
1029
1030 pgp_free_key (&matches);
1031 FREE (&pfcopy);
1032 if (l && !p[l-1])
1033 p[l-1] = '!';
1034 return k;
1035 }
1036
1037out:
1038 FREE (&pfcopy);
1039 if (l && !p[l-1])
1040 p[l-1] = '!';
1041 return NULL;
1042}
1043
1044#endif /* CRYPT_BACKEND_CLASSIC_PGP */