2 * Copyright notice from original mutt:
3 * Copyright (C) 1996,1997 Michael R. Elkins <me@mutt.org>
4 * Copyright (C) 1999-2000 Thomas Roessler <roessler@does-not-exist.org>
5 * Copyright (C) 2001 Thomas Roessler <roessler@does-not-exist.org>
6 * Oliver Ehli <elmy@acm.org>
7 * Copyright (C) 2003 Werner Koch <wk@gnupg.org>
8 * Copyright (C) 2004 g10code GmbH
10 * This file is part of mutt-ng, see http://www.muttng.org/.
11 * It's licensed under the GNU General Public License,
12 * please see the file GPL in the top level source directory.
15 #include <lib-lib/lib-lib.h>
20 #ifdef HAVE_SYS_RESOURCE_H
21 # include <sys/resource.h>
24 #include <lib-mime/mime.h>
26 #include <lib-ui/curses.h>
27 #include <lib-mx/mx.h>
35 /* print the current time to avoid spoofing of the signature output */
36 void crypt_current_time (STATE * s, const char *app_name)
39 char p[STRING], tmp[STRING];
41 if (option (OPTCRYPTTIMESTAMP)) {
43 setlocale (LC_TIME, "");
44 strftime (p, sizeof (p), _(" (current time: %c)"), localtime (&t));
45 setlocale (LC_TIME, "C");
50 snprintf (tmp, sizeof (tmp), _("[-- %s output follows%s --]\n"),
51 NONULL (app_name), p);
52 state_attach_puts (tmp, s);
57 void crypt_forget_passphrase (void)
59 crypt_pgp_void_passphrase ();
60 crypt_smime_void_passphrase ();
61 mutt_message _("Passphrase(s) forgotten.");
65 #if defined(HAVE_SETRLIMIT)
67 static void disable_coredumps (void)
69 struct rlimit rl = { 0, 0 };
70 static short done = 0;
73 setrlimit (RLIMIT_CORE, &rl);
78 #endif /* HAVE_SETRLIMIT */
81 int crypt_valid_passphrase (int flags)
85 # if defined(HAVE_SETRLIMIT)
89 if (flags & APPLICATION_PGP)
90 ret = crypt_pgp_valid_passphrase ();
92 if (flags & APPLICATION_SMIME)
93 ret = crypt_smime_valid_passphrase ();
100 int mutt_protect (HEADER * msg, char *keylist)
102 BODY *pbody = NULL, *tmp_pbody = NULL;
103 BODY *tmp_smime_pbody = NULL;
104 BODY *tmp_pgp_pbody = NULL;
105 int flags = msg->security;
108 if ((msg->security & SIGN) && !crypt_valid_passphrase (msg->security))
111 if ((msg->security & PGPINLINE) == PGPINLINE) {
112 /* they really want to send it inline... go for it */
114 mutt_endwin _("Invoking PGP...");
116 pbody = crypt_pgp_traditional_encryptsign (msg->content, flags, keylist);
118 msg->content = pbody;
122 /* otherwise inline won't work...ask for revert */
124 query_quadoption (OPT_PGPMIMEAUTO,
126 ("Message can't be sent inline. Revert to using PGP/MIME?")))
128 mutt_error _("Mail not sent.");
133 /* go ahead with PGP/MIME */
139 tmp_smime_pbody = msg->content;
140 tmp_pgp_pbody = msg->content;
142 if (msg->security & SIGN) {
143 if (msg->security & APPLICATION_SMIME) {
144 if (!(tmp_pbody = crypt_smime_sign_message (msg->content)))
146 pbody = tmp_smime_pbody = tmp_pbody;
149 if ((msg->security & APPLICATION_PGP)
150 && (!(flags & ENCRYPT) || option (OPTPGPRETAINABLESIG))) {
151 if (!(tmp_pbody = crypt_pgp_sign_message (msg->content)))
155 pbody = tmp_pgp_pbody = tmp_pbody;
158 if ((msg->security & APPLICATION_SMIME)
159 && (msg->security & APPLICATION_PGP)) {
160 /* here comes the draft ;-) */
165 if (msg->security & ENCRYPT) {
166 if ((msg->security & APPLICATION_SMIME)) {
167 if (!(tmp_pbody = crypt_smime_build_smime_entity (tmp_smime_pbody,
169 /* signed ? free it! */
172 /* free tmp_body if messages was signed AND encrypted ... */
173 if (tmp_smime_pbody != msg->content && tmp_smime_pbody != tmp_pbody) {
174 /* detatch and dont't delete msg->content,
175 which tmp_smime_pbody->parts after signing. */
176 tmp_smime_pbody->parts = tmp_smime_pbody->parts->next;
177 msg->content->next = NULL;
178 body_list_wipe(&tmp_smime_pbody);
183 if ((msg->security & APPLICATION_PGP)) {
184 if (!(pbody = crypt_pgp_encrypt_message (tmp_pgp_pbody, keylist,
187 /* did we perform a retainable signature? */
188 if (flags != msg->security) {
189 /* remove the outer multipart layer */
190 tmp_pgp_pbody = mutt_remove_multipart (tmp_pgp_pbody);
191 /* get rid of the signature */
192 body_list_wipe(&tmp_pgp_pbody->next);
198 /* destroy temporary signature envelope when doing retainable
202 if (flags != msg->security) {
203 tmp_pgp_pbody = mutt_remove_multipart (tmp_pgp_pbody);
204 body_list_wipe(&tmp_pgp_pbody->next);
210 msg->content = pbody;
216 int crypt_query (BODY * m)
223 if (m->type == TYPEAPPLICATION) {
224 t |= mutt_is_application_pgp (m);
226 t |= mutt_is_application_smime (m);
232 else if (m->type == TYPETEXT) {
233 t |= mutt_is_application_pgp (m);
238 if (m->type == TYPEMULTIPART) {
239 t |= mutt_is_multipart_encrypted (m);
240 t |= mutt_is_multipart_signed (m);
246 if (m->type == TYPEMULTIPART || m->type == TYPEMESSAGE) {
250 u = m->parts ? 0xffffffff : 0; /* Bits set in all parts */
251 w = 0; /* Bits set in any part */
253 for (p = m->parts; p; p = p->next) {
258 t |= u | (w & ~GOODSIGN);
260 if ((w & GOODSIGN) && !(u & GOODSIGN))
268 int crypt_write_signed (BODY * a, STATE * s, const char *tempfile)
275 if (!(fp = safe_fopen (tempfile, "w"))) {
276 mutt_perror (tempfile);
280 fseeko (s->fpin, a->hdr_offset, 0);
281 bytes = a->length + a->offset - a->hdr_offset;
284 if ((c = fgetc (s->fpin)) == EOF)
292 if (c == '\n' && !hadcr)
308 void convert_to_7bit (BODY * a)
311 if (a->type == TYPEMULTIPART) {
312 if (a->encoding != ENC7BIT) {
313 a->encoding = ENC7BIT;
314 convert_to_7bit (a->parts);
316 else if (option (OPTPGPSTRICTENC))
317 convert_to_7bit (a->parts);
319 else if (a->type == TYPEMESSAGE &&
320 m_strcasecmp(a->subtype, "delivery-status")) {
321 if (a->encoding != ENC7BIT)
322 mutt_message_to_7bit (a, NULL);
324 else if (a->encoding == ENC8BIT)
325 a->encoding = ENCQUOTEDPRINTABLE;
326 else if (a->encoding == ENCBINARY)
327 a->encoding = ENCBASE64;
328 else if (a->content && a->encoding != ENCBASE64 &&
329 (a->content->from || (a->content->space &&
330 option (OPTPGPSTRICTENC))))
331 a->encoding = ENCQUOTEDPRINTABLE;
337 void crypt_extract_keys_from_messages (HEADER * h)
340 char tempfname[_POSIX_PATH_MAX], *mbox;
341 address_t *tmp = NULL;
344 mutt_mktemp (tempfname);
345 if (!(fpout = safe_fopen (tempfname, "w"))) {
346 mutt_perror (tempfname);
350 set_option (OPTDONTHANDLEPGPKEYS);
353 for (i = 0; i < Context->vcount; i++) {
354 if (Context->hdrs[Context->v2r[i]]->tagged) {
355 mutt_parse_mime_message (Context, Context->hdrs[Context->v2r[i]]);
356 if (Context->hdrs[Context->v2r[i]]->security & ENCRYPT &&
357 !crypt_valid_passphrase (Context->hdrs[Context->v2r[i]]->
363 if (Context->hdrs[Context->v2r[i]]->security & APPLICATION_PGP) {
364 mutt_copy_message (fpout, Context, Context->hdrs[Context->v2r[i]],
365 M_CM_DECODE | M_CM_CHARCONV, 0);
368 mutt_endwin (_("Trying to extract PGP keys...\n"));
369 crypt_pgp_invoke_import (tempfname);
372 if (Context->hdrs[Context->v2r[i]]->security & APPLICATION_SMIME) {
373 if (Context->hdrs[Context->v2r[i]]->security & ENCRYPT)
374 mutt_copy_message (fpout, Context, Context->hdrs[Context->v2r[i]],
375 M_CM_NOHEADER | M_CM_DECODE_CRYPT
376 | M_CM_DECODE_SMIME, 0);
378 mutt_copy_message (fpout, Context,
379 Context->hdrs[Context->v2r[i]], 0, 0);
382 if (Context->hdrs[Context->v2r[i]]->env->from)
383 tmp = mutt_expand_aliases (h->env->from);
384 else if (Context->hdrs[Context->v2r[i]]->env->sender)
385 tmp = mutt_expand_aliases (Context->hdrs[Context->v2r[i]]
387 mbox = tmp ? tmp->mailbox : NULL;
389 mutt_endwin (_("Trying to extract S/MIME certificates...\n"));
390 crypt_smime_invoke_import (tempfname, mbox);
400 mutt_parse_mime_message (Context, h);
401 if (!(h->security & ENCRYPT && !crypt_valid_passphrase (h->security))) {
402 if (h->security & APPLICATION_PGP) {
403 mutt_copy_message (fpout, Context, h, M_CM_DECODE | M_CM_CHARCONV, 0);
405 mutt_endwin (_("Trying to extract PGP keys...\n"));
406 crypt_pgp_invoke_import (tempfname);
409 if (h->security & APPLICATION_SMIME) {
410 if (h->security & ENCRYPT)
411 mutt_copy_message (fpout, Context, h, M_CM_NOHEADER
412 | M_CM_DECODE_CRYPT | M_CM_DECODE_SMIME, 0);
414 mutt_copy_message (fpout, Context, h, 0, 0);
418 tmp = mutt_expand_aliases (h->env->from);
419 else if (h->env->sender)
420 tmp = mutt_expand_aliases (h->env->sender);
421 mbox = tmp ? tmp->mailbox : NULL;
422 if (mbox) { /* else ? */
423 mutt_message (_("Trying to extract S/MIME certificates...\n"));
424 crypt_smime_invoke_import (tempfname, mbox);
432 mutt_any_key_to_continue (NULL);
434 mutt_unlink (tempfname);
436 unset_option (OPTDONTHANDLEPGPKEYS);
441 int crypt_get_keys (HEADER * msg, char **keylist)
443 /* Do a quick check to make sure that we can find all of the encryption
444 * keys if the user has requested this service.
447 set_option (OPTPGPCHECKTRUST);
451 if (msg->security & ENCRYPT) {
452 if (msg->security & APPLICATION_PGP) {
453 if ((*keylist = crypt_pgp_findkeys (msg->env->to, msg->env->cc,
454 msg->env->bcc)) == NULL)
456 unset_option (OPTPGPCHECKTRUST);
458 if (msg->security & APPLICATION_SMIME) {
459 if ((*keylist = crypt_smime_findkeys (msg->env->to, msg->env->cc,
460 msg->env->bcc)) == NULL)
470 static void crypt_fetch_signatures (BODY ***signatures, BODY * a, int *n)
472 for (; a; a = a->next) {
473 if (a->type == TYPEMULTIPART)
474 crypt_fetch_signatures (signatures, a->parts, n);
477 p_realloc(signatures, *n + 6);
479 (*signatures)[(*n)++] = a;
486 * This routine verifies a "multipart/signed" body.
489 int mutt_signed_handler (BODY * a, STATE * s)
491 char tempfile[_POSIX_PATH_MAX];
493 int protocol_major = TYPEOTHER;
494 char *protocol_minor = NULL;
497 BODY **signatures = NULL;
503 protocol = parameter_getval(a->parameter, "protocol");
506 /* extract the protocol information */
512 if ((protocol_minor = strchr (protocol, '/')))
515 m_strcpy(major, sizeof(major), protocol);
516 if ((t = strchr (major, '/')))
519 protocol_major = mutt_check_mime_type (major);
522 /* consistency check */
524 if (!(a && a->next && a->next->type == protocol_major &&
525 !m_strcasecmp(a->next->subtype, protocol_minor))) {
526 state_attach_puts (_("[-- Error: "
527 "Inconsistent multipart/signed structure! --]\n\n"),
529 return mutt_body_handler (a, s);
533 if (protocol_major == TYPEAPPLICATION
534 && !m_strcasecmp(protocol_minor, "pgp-signature"));
535 else if (protocol_major == TYPEAPPLICATION
536 && !(m_strcasecmp(protocol_minor, "x-pkcs7-signature")
537 && m_strcasecmp(protocol_minor, "pkcs7-signature")));
538 else if (protocol_major == TYPEMULTIPART
539 && !m_strcasecmp(protocol_minor, "mixed"));
541 state_printf (s, _("[-- Error: "
542 "Unknown multipart/signed protocol %s! --]\n\n"),
544 return mutt_body_handler (a, s);
547 if (s->flags & M_DISPLAY) {
549 crypt_fetch_signatures (&signatures, a->next, &sigcnt);
552 mutt_mktemp (tempfile);
553 if (crypt_write_signed (a, s, tempfile) == 0) {
554 for (i = 0; i < sigcnt; i++) {
555 if (signatures[i]->type == TYPEAPPLICATION
556 && !m_strcasecmp(signatures[i]->subtype, "pgp-signature")) {
557 if (crypt_pgp_verify_one (signatures[i], s, tempfile) != 0)
563 if (signatures[i]->type == TYPEAPPLICATION
564 && (!m_strcasecmp(signatures[i]->subtype, "x-pkcs7-signature")
565 || !m_strcasecmp(signatures[i]->subtype, "pkcs7-signature")))
567 if (crypt_smime_verify_one (signatures[i], s, tempfile) != 0)
573 state_printf (s, _("[-- Warning: "
574 "We can't verify %s/%s signatures. --]\n\n"),
575 TYPE (signatures[i]), signatures[i]->subtype);
579 mutt_unlink (tempfile);
581 b->goodsig = goodsig;
582 b->badsig = !goodsig;
584 /* Now display the signed body */
585 state_attach_puts (_("[-- The following data is signed --]\n\n"), s);
588 p_delete(&signatures);
591 state_attach_puts (_("[-- Warning: Can't find any signatures. --]\n\n"),
595 rc = mutt_body_handler (a, s);
597 if (s->flags & M_DISPLAY && sigcnt)
598 state_attach_puts (_("\n[-- End of signed data --]\n"), s);