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.
30 #ifdef HAVE_SYS_TIME_H
31 # include <sys/time.h>
33 #ifdef HAVE_SYS_RESOURCE_H
34 # include <sys/resource.h>
37 #include <lib-lib/str.h>
38 #include <lib-lib/file.h>
39 #include <lib-lib/ascii.h>
40 #include <lib-lib/mem.h>
41 #include <lib-lib/macros.h>
43 #include <lib-mime/mime.h>
45 #include <lib-ui/curses.h>
54 /* print the current time to avoid spoofing of the signature output */
55 void crypt_current_time (STATE * s, const char *app_name)
58 char p[STRING], tmp[STRING];
60 if (option (OPTCRYPTTIMESTAMP)) {
62 setlocale (LC_TIME, "");
63 strftime (p, sizeof (p), _(" (current time: %c)"), localtime (&t));
64 setlocale (LC_TIME, "C");
69 snprintf (tmp, sizeof (tmp), _("[-- %s output follows%s --]\n"),
70 NONULL (app_name), p);
71 state_attach_puts (tmp, s);
76 void crypt_forget_passphrase (void)
78 crypt_pgp_void_passphrase ();
79 crypt_smime_void_passphrase ();
80 mutt_message _("Passphrase(s) forgotten.");
84 #if defined(HAVE_SETRLIMIT)
86 static void disable_coredumps (void)
88 struct rlimit rl = { 0, 0 };
89 static short done = 0;
92 setrlimit (RLIMIT_CORE, &rl);
97 #endif /* HAVE_SETRLIMIT */
100 int crypt_valid_passphrase (int flags)
104 # if defined(HAVE_SETRLIMIT)
105 disable_coredumps ();
108 if (flags & APPLICATION_PGP)
109 ret = crypt_pgp_valid_passphrase ();
111 if (flags & APPLICATION_SMIME)
112 ret = crypt_smime_valid_passphrase ();
119 int mutt_protect (HEADER * msg, char *keylist)
121 BODY *pbody = NULL, *tmp_pbody = NULL;
122 BODY *tmp_smime_pbody = NULL;
123 BODY *tmp_pgp_pbody = NULL;
124 int flags = msg->security;
127 if ((msg->security & SIGN) && !crypt_valid_passphrase (msg->security))
130 if ((msg->security & PGPINLINE) == PGPINLINE) {
131 /* they really want to send it inline... go for it */
133 mutt_endwin _("Invoking PGP...");
135 pbody = crypt_pgp_traditional_encryptsign (msg->content, flags, keylist);
137 msg->content = pbody;
141 /* otherwise inline won't work...ask for revert */
143 query_quadoption (OPT_PGPMIMEAUTO,
145 ("Message can't be sent inline. Revert to using PGP/MIME?")))
147 mutt_error _("Mail not sent.");
152 /* go ahead with PGP/MIME */
158 tmp_smime_pbody = msg->content;
159 tmp_pgp_pbody = msg->content;
161 if (msg->security & SIGN) {
162 if (msg->security & APPLICATION_SMIME) {
163 if (!(tmp_pbody = crypt_smime_sign_message (msg->content)))
165 pbody = tmp_smime_pbody = tmp_pbody;
168 if ((msg->security & APPLICATION_PGP)
169 && (!(flags & ENCRYPT) || option (OPTPGPRETAINABLESIG))) {
170 if (!(tmp_pbody = crypt_pgp_sign_message (msg->content)))
174 pbody = tmp_pgp_pbody = tmp_pbody;
177 if ((msg->security & APPLICATION_SMIME)
178 && (msg->security & APPLICATION_PGP)) {
179 /* here comes the draft ;-) */
184 if (msg->security & ENCRYPT) {
185 if ((msg->security & APPLICATION_SMIME)) {
186 if (!(tmp_pbody = crypt_smime_build_smime_entity (tmp_smime_pbody,
188 /* signed ? free it! */
191 /* free tmp_body if messages was signed AND encrypted ... */
192 if (tmp_smime_pbody != msg->content && tmp_smime_pbody != tmp_pbody) {
193 /* detatch and dont't delete msg->content,
194 which tmp_smime_pbody->parts after signing. */
195 tmp_smime_pbody->parts = tmp_smime_pbody->parts->next;
196 msg->content->next = NULL;
197 mutt_free_body (&tmp_smime_pbody);
202 if ((msg->security & APPLICATION_PGP)) {
203 if (!(pbody = crypt_pgp_encrypt_message (tmp_pgp_pbody, keylist,
206 /* did we perform a retainable signature? */
207 if (flags != msg->security) {
208 /* remove the outer multipart layer */
209 tmp_pgp_pbody = mutt_remove_multipart (tmp_pgp_pbody);
210 /* get rid of the signature */
211 mutt_free_body (&tmp_pgp_pbody->next);
217 /* destroy temporary signature envelope when doing retainable
221 if (flags != msg->security) {
222 tmp_pgp_pbody = mutt_remove_multipart (tmp_pgp_pbody);
223 mutt_free_body (&tmp_pgp_pbody->next);
229 msg->content = pbody;
237 int mutt_is_multipart_signed (BODY * b)
241 if (!b || !(b->type == TYPEMULTIPART) ||
242 !b->subtype || ascii_strcasecmp (b->subtype, "signed"))
245 if (!(p = mutt_get_parameter ("protocol", b->parameter)))
248 if (!(ascii_strcasecmp (p, "multipart/mixed")))
251 if (!(ascii_strcasecmp (p, "application/pgp-signature")))
254 if (!(ascii_strcasecmp (p, "application/x-pkcs7-signature")))
256 if (!(ascii_strcasecmp (p, "application/pkcs7-signature")))
263 int mutt_is_multipart_encrypted (BODY * b)
267 if (!b || b->type != TYPEMULTIPART ||
268 !b->subtype || ascii_strcasecmp (b->subtype, "encrypted") ||
269 !(p = mutt_get_parameter ("protocol", b->parameter)) ||
270 ascii_strcasecmp (p, "application/pgp-encrypted"))
277 int mutt_is_application_pgp (BODY * m)
282 if (m->type == TYPEAPPLICATION) {
283 if (!ascii_strcasecmp (m->subtype, "pgp")
284 || !ascii_strcasecmp (m->subtype, "x-pgp-message")) {
285 if ((p = mutt_get_parameter ("x-action", m->parameter))
286 && (!ascii_strcasecmp (p, "sign")
287 || !ascii_strcasecmp (p, "signclear")))
290 if ((p = mutt_get_parameter ("format", m->parameter)) &&
291 !ascii_strcasecmp (p, "keys-only"))
295 t |= PGPENCRYPT; /* not necessarily correct, but... */
298 if (!ascii_strcasecmp (m->subtype, "pgp-signed"))
301 if (!ascii_strcasecmp (m->subtype, "pgp-keys"))
304 else if (m->type == TYPETEXT && ascii_strcasecmp ("plain", m->subtype) == 0) {
305 if (((p = mutt_get_parameter ("x-mutt-action", m->parameter))
306 || (p = mutt_get_parameter ("x-action", m->parameter))
307 || (p = mutt_get_parameter ("action", m->parameter)))
308 && !ascii_strncasecmp ("pgp-sign", p, 8))
310 else if (p && !ascii_strncasecmp ("pgp-encrypt", p, 11))
312 else if (p && !ascii_strncasecmp ("pgp-keys", p, 7))
321 int mutt_is_application_smime (BODY * m)
324 int len, complain = 0;
329 if ((m->type & TYPEAPPLICATION) && m->subtype) {
330 /* S/MIME MIME types don't need x- anymore, see RFC2311 */
331 if (!ascii_strcasecmp (m->subtype, "x-pkcs7-mime") ||
332 !ascii_strcasecmp (m->subtype, "pkcs7-mime")) {
333 if ((t = mutt_get_parameter ("smime-type", m->parameter))) {
334 if (!ascii_strcasecmp (t, "enveloped-data"))
336 else if (!ascii_strcasecmp (t, "signed-data"))
337 return (SMIMESIGN | SMIMEOPAQUE);
342 * Content-Description: S/MIME Encrypted Message
343 * instead of Content-Type parameter
345 if (!ascii_strcasecmp (m->description, "S/MIME Encrypted Message"))
349 else if (ascii_strcasecmp (m->subtype, "octet-stream"))
352 t = mutt_get_parameter ("name", m->parameter);
361 ("S/MIME messages with no hints on content are unsupported."));
365 /* no .p7c, .p10 support yet. */
367 len = m_strlen(t) - 4;
368 if (len > 0 && *(t + len) == '.') {
370 if (!ascii_strcasecmp ((t + len), "p7m"))
374 /* Not sure if this is the correct thing to do, but
375 it's required for compatibility with Outlook */
376 return (SMIMESIGN | SMIMEOPAQUE);
378 else if (!ascii_strcasecmp ((t + len), "p7s"))
379 return (SMIMESIGN | SMIMEOPAQUE);
391 int crypt_query (BODY * m)
398 if (m->type == TYPEAPPLICATION) {
399 t |= mutt_is_application_pgp (m);
401 t |= mutt_is_application_smime (m);
407 else if (m->type == TYPETEXT) {
408 t |= mutt_is_application_pgp (m);
413 if (m->type == TYPEMULTIPART) {
414 t |= mutt_is_multipart_encrypted (m);
415 t |= mutt_is_multipart_signed (m);
421 if (m->type == TYPEMULTIPART || m->type == TYPEMESSAGE) {
425 u = m->parts ? 0xffffffff : 0; /* Bits set in all parts */
426 w = 0; /* Bits set in any part */
428 for (p = m->parts; p; p = p->next) {
433 t |= u | (w & ~GOODSIGN);
435 if ((w & GOODSIGN) && !(u & GOODSIGN))
445 int crypt_write_signed (BODY * a, STATE * s, const char *tempfile)
452 if (!(fp = safe_fopen (tempfile, "w"))) {
453 mutt_perror (tempfile);
457 fseeko (s->fpin, a->hdr_offset, 0);
458 bytes = a->length + a->offset - a->hdr_offset;
461 if ((c = fgetc (s->fpin)) == EOF)
469 if (c == '\n' && !hadcr)
485 void convert_to_7bit (BODY * a)
488 if (a->type == TYPEMULTIPART) {
489 if (a->encoding != ENC7BIT) {
490 a->encoding = ENC7BIT;
491 convert_to_7bit (a->parts);
493 else if (option (OPTPGPSTRICTENC))
494 convert_to_7bit (a->parts);
496 else if (a->type == TYPEMESSAGE &&
497 m_strcasecmp(a->subtype, "delivery-status")) {
498 if (a->encoding != ENC7BIT)
499 mutt_message_to_7bit (a, NULL);
501 else if (a->encoding == ENC8BIT)
502 a->encoding = ENCQUOTEDPRINTABLE;
503 else if (a->encoding == ENCBINARY)
504 a->encoding = ENCBASE64;
505 else if (a->content && a->encoding != ENCBASE64 &&
506 (a->content->from || (a->content->space &&
507 option (OPTPGPSTRICTENC))))
508 a->encoding = ENCQUOTEDPRINTABLE;
516 void crypt_extract_keys_from_messages (HEADER * h)
519 char tempfname[_POSIX_PATH_MAX], *mbox;
520 address_t *tmp = NULL;
523 mutt_mktemp (tempfname);
524 if (!(fpout = safe_fopen (tempfname, "w"))) {
525 mutt_perror (tempfname);
529 set_option (OPTDONTHANDLEPGPKEYS);
532 for (i = 0; i < Context->vcount; i++) {
533 if (Context->hdrs[Context->v2r[i]]->tagged) {
534 mutt_parse_mime_message (Context, Context->hdrs[Context->v2r[i]]);
535 if (Context->hdrs[Context->v2r[i]]->security & ENCRYPT &&
536 !crypt_valid_passphrase (Context->hdrs[Context->v2r[i]]->
542 if (Context->hdrs[Context->v2r[i]]->security & APPLICATION_PGP) {
543 mutt_copy_message (fpout, Context, Context->hdrs[Context->v2r[i]],
544 M_CM_DECODE | M_CM_CHARCONV, 0);
547 mutt_endwin (_("Trying to extract PGP keys...\n"));
548 crypt_pgp_invoke_import (tempfname);
551 if (Context->hdrs[Context->v2r[i]]->security & APPLICATION_SMIME) {
552 if (Context->hdrs[Context->v2r[i]]->security & ENCRYPT)
553 mutt_copy_message (fpout, Context, Context->hdrs[Context->v2r[i]],
554 M_CM_NOHEADER | M_CM_DECODE_CRYPT
555 | M_CM_DECODE_SMIME, 0);
557 mutt_copy_message (fpout, Context,
558 Context->hdrs[Context->v2r[i]], 0, 0);
561 if (Context->hdrs[Context->v2r[i]]->env->from)
562 tmp = mutt_expand_aliases (h->env->from);
563 else if (Context->hdrs[Context->v2r[i]]->env->sender)
564 tmp = mutt_expand_aliases (Context->hdrs[Context->v2r[i]]
566 mbox = tmp ? tmp->mailbox : NULL;
568 mutt_endwin (_("Trying to extract S/MIME certificates...\n"));
569 crypt_smime_invoke_import (tempfname, mbox);
579 mutt_parse_mime_message (Context, h);
580 if (!(h->security & ENCRYPT && !crypt_valid_passphrase (h->security))) {
581 if (h->security & APPLICATION_PGP) {
582 mutt_copy_message (fpout, Context, h, M_CM_DECODE | M_CM_CHARCONV, 0);
584 mutt_endwin (_("Trying to extract PGP keys...\n"));
585 crypt_pgp_invoke_import (tempfname);
588 if (h->security & APPLICATION_SMIME) {
589 if (h->security & ENCRYPT)
590 mutt_copy_message (fpout, Context, h, M_CM_NOHEADER
591 | M_CM_DECODE_CRYPT | M_CM_DECODE_SMIME, 0);
593 mutt_copy_message (fpout, Context, h, 0, 0);
597 tmp = mutt_expand_aliases (h->env->from);
598 else if (h->env->sender)
599 tmp = mutt_expand_aliases (h->env->sender);
600 mbox = tmp ? tmp->mailbox : NULL;
601 if (mbox) { /* else ? */
602 mutt_message (_("Trying to extract S/MIME certificates...\n"));
603 crypt_smime_invoke_import (tempfname, mbox);
611 mutt_any_key_to_continue (NULL);
613 mutt_unlink (tempfname);
615 unset_option (OPTDONTHANDLEPGPKEYS);
620 int crypt_get_keys (HEADER * msg, char **keylist)
622 /* Do a quick check to make sure that we can find all of the encryption
623 * keys if the user has requested this service.
626 set_option (OPTPGPCHECKTRUST);
630 if (msg->security & ENCRYPT) {
631 if (msg->security & APPLICATION_PGP) {
632 if ((*keylist = crypt_pgp_findkeys (msg->env->to, msg->env->cc,
633 msg->env->bcc)) == NULL)
635 unset_option (OPTPGPCHECKTRUST);
637 if (msg->security & APPLICATION_SMIME) {
638 if ((*keylist = crypt_smime_findkeys (msg->env->to, msg->env->cc,
639 msg->env->bcc)) == NULL)
649 static void crypt_fetch_signatures (BODY ***signatures, BODY * a, int *n)
651 for (; a; a = a->next) {
652 if (a->type == TYPEMULTIPART)
653 crypt_fetch_signatures (signatures, a->parts, n);
656 p_realloc(signatures, *n + 6);
658 (*signatures)[(*n)++] = a;
665 * This routine verifies a "multipart/signed" body.
668 int mutt_signed_handler (BODY * a, STATE * s)
670 char tempfile[_POSIX_PATH_MAX];
672 int protocol_major = TYPEOTHER;
673 char *protocol_minor = NULL;
676 BODY **signatures = NULL;
682 protocol = mutt_get_parameter ("protocol", a->parameter);
685 /* extract the protocol information */
691 if ((protocol_minor = strchr (protocol, '/')))
694 m_strcpy(major, sizeof(major), protocol);
695 if ((t = strchr (major, '/')))
698 protocol_major = mutt_check_mime_type (major);
701 /* consistency check */
703 if (!(a && a->next && a->next->type == protocol_major &&
704 !m_strcasecmp(a->next->subtype, protocol_minor))) {
705 state_attach_puts (_("[-- Error: "
706 "Inconsistent multipart/signed structure! --]\n\n"),
708 return mutt_body_handler (a, s);
712 if (protocol_major == TYPEAPPLICATION
713 && !m_strcasecmp(protocol_minor, "pgp-signature"));
714 else if (protocol_major == TYPEAPPLICATION
715 && !(m_strcasecmp(protocol_minor, "x-pkcs7-signature")
716 && m_strcasecmp(protocol_minor, "pkcs7-signature")));
717 else if (protocol_major == TYPEMULTIPART
718 && !m_strcasecmp(protocol_minor, "mixed"));
720 state_printf (s, _("[-- Error: "
721 "Unknown multipart/signed protocol %s! --]\n\n"),
723 return mutt_body_handler (a, s);
726 if (s->flags & M_DISPLAY) {
728 crypt_fetch_signatures (&signatures, a->next, &sigcnt);
731 mutt_mktemp (tempfile);
732 if (crypt_write_signed (a, s, tempfile) == 0) {
733 for (i = 0; i < sigcnt; i++) {
734 if (signatures[i]->type == TYPEAPPLICATION
735 && !m_strcasecmp(signatures[i]->subtype, "pgp-signature")) {
736 if (crypt_pgp_verify_one (signatures[i], s, tempfile) != 0)
742 if (signatures[i]->type == TYPEAPPLICATION
743 && (!m_strcasecmp(signatures[i]->subtype, "x-pkcs7-signature")
744 || !m_strcasecmp(signatures[i]->subtype, "pkcs7-signature")))
746 if (crypt_smime_verify_one (signatures[i], s, tempfile) != 0)
752 state_printf (s, _("[-- Warning: "
753 "We can't verify %s/%s signatures. --]\n\n"),
754 TYPE (signatures[i]), signatures[i]->subtype);
758 mutt_unlink (tempfile);
760 b->goodsig = goodsig;
761 b->badsig = !goodsig;
763 /* Now display the signed body */
764 state_attach_puts (_("[-- The following data is signed --]\n\n"), s);
767 p_delete(&signatures);
770 state_attach_puts (_("[-- Warning: Can't find any signatures. --]\n\n"),
774 rc = mutt_body_handler (a, s);
776 if (s->flags & M_DISPLAY && sigcnt)
777 state_attach_puts (_("\n[-- End of signed data --]\n"), s);