NeoMutt  2023-03-22-27-g3cb248
Teaching an old dog new tricks
DOXYGEN
header.c
Go to the documentation of this file.
1
29#include "config.h"
30#include <stdbool.h>
31#include <stdlib.h>
32#include <string.h>
33#include "mutt/lib.h"
34#include "address/lib.h"
35#include "config/lib.h"
36#include "email/lib.h"
37#include "gui/lib.h"
38#include "header.h"
39#include "globals.h" // IWYU pragma: keep
40#ifdef USE_AUTOCRYPT
41#include "autocrypt/lib.h"
42#endif
43
49static const char *const userhdrs_override_headers[] = {
50 "content-type:",
51 "user-agent:",
52};
53
58{
61};
62
67{
70};
71
82static int print_val(FILE *fp, const char *pfx, const char *value,
83 CopyHeaderFlags chflags, size_t col)
84{
85 while (value && (value[0] != '\0'))
86 {
87 if (fputc(*value, fp) == EOF)
88 return -1;
89 /* corner-case: break words longer than 998 chars by force,
90 * mandated by RFC5322 */
91 if (!(chflags & CH_DISPLAY) && (++col >= 998))
92 {
93 if (fputs("\n ", fp) < 0)
94 return -1;
95 col = 1;
96 }
97 if (*value == '\n')
98 {
99 if ((value[1] != '\0') && pfx && (pfx[0] != '\0') && (fputs(pfx, fp) == EOF))
100 return -1;
101 /* for display, turn folding spaces into folding tabs */
102 if ((chflags & CH_DISPLAY) && ((value[1] == ' ') || (value[1] == '\t')))
103 {
104 value++;
105 while ((value[0] != '\0') && ((value[0] == ' ') || (value[0] == '\t')))
106 value++;
107 if (fputc('\t', fp) == EOF)
108 return -1;
109 continue;
110 }
111 }
112 value++;
113 }
114 return 0;
115}
116
129static int fold_one_header(FILE *fp, const char *tag, const char *value, size_t vlen,
130 const char *pfx, int wraplen, CopyHeaderFlags chflags)
131{
132 if (!value || (*value == '\0') || !vlen)
133 return 0;
134
135 const char *p = value;
136 char buf[8192] = { 0 };
137 int first = 1, col = 0, l = 0;
138 const bool display = (chflags & CH_DISPLAY);
139
140 mutt_debug(LL_DEBUG5, "pfx=[%s], tag=[%s], flags=%d value=[%.*s]\n", pfx, tag,
141 chflags, (int) ((value[vlen - 1] == '\n') ? vlen - 1 : vlen), value);
142
143 if (tag && *tag && (fprintf(fp, "%s%s: ", NONULL(pfx), tag) < 0))
144 return -1;
145 col = mutt_str_len(tag) + ((tag && (tag[0] != '\0')) ? 2 : 0) + mutt_str_len(pfx);
146
147 while (p && (p[0] != '\0'))
148 {
149 int fold = 0;
150
151 /* find the next word and place it in 'buf'. it may start with
152 * whitespace we can fold before */
153 const char *next = mutt_str_find_word(p);
154 l = MIN(sizeof(buf) - 1, next - p);
155 memcpy(buf, p, l);
156 buf[l] = '\0';
157
158 /* determine width: character cells for display, bytes for sending
159 * (we get pure ascii only) */
160 const int w = mutt_mb_width(buf, col, display);
161 const int enc = mutt_str_startswith(buf, "=?");
162
163 mutt_debug(LL_DEBUG5, "word=[%s], col=%d, w=%d, next=[0x0%x]\n",
164 (buf[0] == '\n' ? "\\n" : buf), col, w, *next);
165
166 /* insert a folding \n before the current word's lwsp except for
167 * header name, first word on a line (word longer than wrap width)
168 * and encoded words */
169 if (!first && !enc && col && ((col + w) >= wraplen))
170 {
171 col = mutt_str_len(pfx);
172 fold = 1;
173 if (fprintf(fp, "\n%s", NONULL(pfx)) <= 0)
174 return -1;
175 }
176
177 /* print the actual word; for display, ignore leading ws for word
178 * and fold with tab for readability */
179 if (display && fold)
180 {
181 char *pc = buf;
182 while ((pc[0] != '\0') && ((pc[0] == ' ') || (pc[0] == '\t')))
183 {
184 pc++;
185 col--;
186 }
187 if (fputc('\t', fp) == EOF)
188 return -1;
189 if (print_val(fp, pfx, pc, chflags, col) < 0)
190 return -1;
191 col += 8;
192 }
193 else if (print_val(fp, pfx, buf, chflags, col) < 0)
194 return -1;
195 col += w;
196
197 /* if the current word ends in \n, ignore all its trailing spaces
198 * and reset column; this prevents us from putting only spaces (or
199 * even none) on a line if the trailing spaces are located at our
200 * current line width
201 * XXX this covers ASCII space only, for display we probably
202 * want something like iswspace() here */
203 const char *sp = next;
204 while ((sp[0] != '\0') && ((sp[0] == ' ') || (sp[0] == '\t')))
205 sp++;
206 if (sp[0] == '\n')
207 {
208 if (sp[1] == '\0')
209 break;
210 next = sp;
211 col = 0;
212 }
213
214 p = next;
215 first = 0;
216 }
217
218 /* if we have printed something but didn't \n-terminate it, do it
219 * except the last word we printed ended in \n already */
220 if (col && ((l == 0) || (buf[l - 1] != '\n')))
221 if (putc('\n', fp) == EOF)
222 return -1;
223
224 return 0;
225}
226
234static char *unfold_header(char *s)
235{
236 char *p = s;
237 char *q = s;
238
239 while (p && (p[0] != '\0'))
240 {
241 /* remove CRLF prior to FWSP, turn \t into ' ' */
242 if ((p[0] == '\r') && (p[1] == '\n') && ((p[2] == ' ') || (p[2] == '\t')))
243 {
244 *q++ = ' ';
245 p += 3;
246 continue;
247 }
248 /* remove LF prior to FWSP, turn \t into ' ' */
249 else if ((p[0] == '\n') && ((p[1] == ' ') || (p[1] == '\t')))
250 {
251 *q++ = ' ';
252 p += 2;
253 continue;
254 }
255 *q++ = *p++;
256 }
257 if (q)
258 q[0] = '\0';
259
260 return s;
261}
262
271static int userhdrs_override_cmp(const void *a, const void *b)
272{
273 const char *ca = a;
274 const char *cb = *(const char **) b;
275 return mutt_istrn_cmp(ca, cb, strlen(cb));
276}
277
291static int write_one_header(FILE *fp, int pfxw, int max, int wraplen, const char *pfx,
292 const char *start, const char *end, CopyHeaderFlags chflags)
293{
294 const char *t = strchr(start, ':');
295 if (!t || (t > end))
296 {
297 mutt_debug(LL_DEBUG1, "#2 warning: header not in 'key: value' format!\n");
298 return 0;
299 }
300
301 const size_t vallen = end - start;
302 const bool short_enough = (pfxw + max <= wraplen);
303
304 mutt_debug((short_enough ? LL_DEBUG2 : LL_DEBUG5), "buf[%s%.*s] %s, max width = %d %s %d\n",
305 NONULL(pfx), (int) (vallen - 1) /* skip newline */, start,
306 (short_enough ? "short enough" : "too long"), max,
307 (short_enough ? "<=" : ">"), wraplen);
308
309 int rc = 0;
310 const char *valbuf = NULL, *tagbuf = NULL;
311 const bool is_from = (vallen > 5) && mutt_istr_startswith(start, "from ");
312
313 /* only pass through folding machinery if necessary for sending,
314 * never wrap From_ headers on sending */
315 if (!(chflags & CH_DISPLAY) && (short_enough || is_from))
316 {
317 if (pfx && *pfx)
318 {
319 if (fputs(pfx, fp) == EOF)
320 {
321 return -1;
322 }
323 }
324
325 valbuf = mutt_strn_dup(start, end - start);
326 rc = print_val(fp, pfx, valbuf, chflags, mutt_str_len(pfx));
327 }
328 else
329 {
330 if (!is_from)
331 {
332 tagbuf = mutt_strn_dup(start, t - start);
333 /* skip over the colon separating the header field name and value */
334 t++;
335
336 /* skip over any leading whitespace (WSP, as defined in RFC5322)
337 * NOTE: mutt_str_skip_email_wsp() does the wrong thing here.
338 * See tickets 3609 and 3716. */
339 while ((*t == ' ') || (*t == '\t'))
340 t++;
341 }
342 const char *s = is_from ? start : t;
343 valbuf = mutt_strn_dup(s, end - s);
344 rc = fold_one_header(fp, tagbuf, valbuf, end - s, pfx, wraplen, chflags);
345 }
346
347 FREE(&tagbuf);
348 FREE(&valbuf);
349 return rc;
350}
351
360static struct UserHdrsOverride write_userhdrs(FILE *fp, const struct ListHead *userhdrs,
361 bool privacy, struct ConfigSubset *sub)
362{
363 struct UserHdrsOverride overrides = { { 0 } };
364
365 struct ListNode *tmp = NULL;
366 STAILQ_FOREACH(tmp, userhdrs, entries)
367 {
368 char *const colon = strchr(tmp->data, ':');
369 if (!colon)
370 {
371 continue;
372 }
373
374 const char *const value = mutt_str_skip_email_wsp(colon + 1);
375 if (*value == '\0')
376 {
377 continue; /* don't emit empty fields. */
378 }
379
380 /* check whether the current user-header is an override */
381 size_t cur_override = (size_t) -1;
382 const char *const *idx = bsearch(tmp->data, userhdrs_override_headers,
384 sizeof(char *), userhdrs_override_cmp);
385 if (idx != NULL)
386 {
387 cur_override = idx - userhdrs_override_headers;
388 overrides.is_overridden[cur_override] = true;
389 }
390
391 if (privacy && (cur_override == USERHDRS_OVERRIDE_USER_AGENT))
392 {
393 continue;
394 }
395
396 *colon = '\0';
397 mutt_write_one_header(fp, tmp->data, value, NULL, 0, CH_NO_FLAGS, sub);
398 *colon = ':';
399 }
400
401 return overrides;
402}
403
419int mutt_write_one_header(FILE *fp, const char *tag, const char *value,
420 const char *pfx, int wraplen, CopyHeaderFlags chflags,
421 struct ConfigSubset *sub)
422{
423 char *last = NULL, *line = NULL;
424 int max = 0, w, rc = -1;
425 int pfxw = mutt_strwidth(pfx);
426 char *v = mutt_str_dup(value);
427 bool display = (chflags & CH_DISPLAY);
428
429 const bool c_weed = cs_subset_bool(sub, "weed");
430 if (!display || c_weed)
431 v = unfold_header(v);
432
433 /* when not displaying, use sane wrap value */
434 if (!display)
435 {
436 const short c_wrap_headers = cs_subset_number(sub, "wrap_headers");
437 if ((c_wrap_headers < 78) || (c_wrap_headers > 998))
438 wraplen = 78;
439 else
440 wraplen = c_wrap_headers;
441 }
442 else if (wraplen <= 0)
443 wraplen = 78;
444
445 const size_t vlen = mutt_str_len(v);
446 if (tag)
447 {
448 /* if header is short enough, simply print it */
449 if (!display && (mutt_strwidth(tag) + 2 + pfxw + mutt_strnwidth(v, vlen) <= wraplen))
450 {
451 mutt_debug(LL_DEBUG5, "buf[%s%s: %s] is short enough\n", NONULL(pfx), tag, v);
452 if (fprintf(fp, "%s%s: %s\n", NONULL(pfx), tag, v) <= 0)
453 goto out;
454 rc = 0;
455 goto out;
456 }
457 else
458 {
459 rc = fold_one_header(fp, tag, v, vlen, pfx, wraplen, chflags);
460 goto out;
461 }
462 }
463
464 char *p = v;
465 last = v;
466 line = v;
467 while (p && *p)
468 {
469 p = strchr(p, '\n');
470
471 /* find maximum line width in current header */
472 if (p)
473 *p = '\0';
474 w = mutt_mb_width(line, 0, display);
475 if (w > max)
476 max = w;
477 if (p)
478 *p = '\n';
479
480 if (!p)
481 break;
482
483 line = ++p;
484 if ((*p != ' ') && (*p != '\t'))
485 {
486 if (write_one_header(fp, pfxw, max, wraplen, pfx, last, p, chflags) < 0)
487 goto out;
488 last = p;
489 max = 0;
490 }
491 }
492
493 if (last && *last)
494 if (write_one_header(fp, pfxw, max, wraplen, pfx, last, p, chflags) < 0)
495 goto out;
496
497 rc = 0;
498
499out:
500 FREE(&v);
501 return rc;
502}
503
513void mutt_write_references(const struct ListHead *r, FILE *fp, size_t trim)
514{
515 struct ListNode *np = NULL;
516 size_t length = 0;
517
518 STAILQ_FOREACH(np, r, entries)
519 {
520 if (++length == trim)
521 break;
522 }
523
524 struct ListNode **ref = mutt_mem_calloc(length, sizeof(struct ListNode *));
525
526 // store in reverse order
527 size_t tmp = length;
528 STAILQ_FOREACH(np, r, entries)
529 {
530 ref[--tmp] = np;
531 if (tmp == 0)
532 break;
533 }
534
535 for (size_t i = 0; i < length; i++)
536 {
537 fputc(' ', fp);
538 fputs(ref[i]->data, fp);
539 if (i != length - 1)
540 fputc('\n', fp);
541 }
542
543 FREE(&ref);
544}
545
571int mutt_rfc822_write_header(FILE *fp, struct Envelope *env, struct Body *attach,
572 enum MuttWriteHeaderMode mode, bool privacy,
573 bool hide_protected_subject, struct ConfigSubset *sub)
574{
575 if (((mode == MUTT_WRITE_HEADER_NORMAL) || (mode == MUTT_WRITE_HEADER_FCC) ||
576 (mode == MUTT_WRITE_HEADER_POSTPONE)) &&
577 !privacy)
578 {
579 struct Buffer *date = mutt_buffer_pool_get();
580 mutt_date_make_date(date, cs_subset_bool(sub, "local_date_header"));
581 fprintf(fp, "Date: %s\n", mutt_buffer_string(date));
583 }
584
585 /* UseFrom is not consulted here so that we can still write a From:
586 * field if the user sets it with the 'my_hdr' command */
587 if (!TAILQ_EMPTY(&env->from) && !privacy)
588 {
589 mutt_addrlist_write_file(&env->from, fp, "From");
590 }
591
592 if (!TAILQ_EMPTY(&env->sender) && !privacy)
593 {
594 mutt_addrlist_write_file(&env->sender, fp, "Sender");
595 }
596
597 if (!TAILQ_EMPTY(&env->to))
598 {
599 mutt_addrlist_write_file(&env->to, fp, "To");
600 }
601 else if (mode == MUTT_WRITE_HEADER_EDITHDRS)
602#ifdef USE_NNTP
603 if (!OptNewsSend)
604#endif
605 fputs("To:\n", fp);
606
607 if (!TAILQ_EMPTY(&env->cc))
608 {
609 mutt_addrlist_write_file(&env->cc, fp, "Cc");
610 }
611 else if (mode == MUTT_WRITE_HEADER_EDITHDRS)
612#ifdef USE_NNTP
613 if (!OptNewsSend)
614#endif
615 fputs("Cc:\n", fp);
616
617 if (!TAILQ_EMPTY(&env->bcc))
618 {
619 const bool c_write_bcc = cs_subset_bool(sub, "write_bcc");
620
621 if ((mode == MUTT_WRITE_HEADER_POSTPONE) ||
622 (mode == MUTT_WRITE_HEADER_EDITHDRS) || (mode == MUTT_WRITE_HEADER_FCC) ||
623 ((mode == MUTT_WRITE_HEADER_NORMAL) && c_write_bcc))
624 {
625 mutt_addrlist_write_file(&env->bcc, fp, "Bcc");
626 }
627 }
628 else if (mode == MUTT_WRITE_HEADER_EDITHDRS)
629#ifdef USE_NNTP
630 if (!OptNewsSend)
631#endif
632 fputs("Bcc:\n", fp);
633
634#ifdef USE_NNTP
635 if (env->newsgroups)
636 fprintf(fp, "Newsgroups: %s\n", env->newsgroups);
637 else if ((mode == MUTT_WRITE_HEADER_EDITHDRS) && OptNewsSend)
638 fputs("Newsgroups:\n", fp);
639
640 if (env->followup_to)
641 fprintf(fp, "Followup-To: %s\n", env->followup_to);
642 else if ((mode == MUTT_WRITE_HEADER_EDITHDRS) && OptNewsSend)
643 fputs("Followup-To:\n", fp);
644
645 const bool c_x_comment_to = cs_subset_bool(sub, "x_comment_to");
646 if (env->x_comment_to)
647 fprintf(fp, "X-Comment-To: %s\n", env->x_comment_to);
648 else if ((mode == MUTT_WRITE_HEADER_EDITHDRS) && OptNewsSend && c_x_comment_to)
649 fputs("X-Comment-To:\n", fp);
650#endif
651
652 if (env->subject)
653 {
654 if (hide_protected_subject &&
655 ((mode == MUTT_WRITE_HEADER_NORMAL) || (mode == MUTT_WRITE_HEADER_FCC) ||
657 {
658 const char *const c_crypt_protected_headers_subject = cs_subset_string(sub, "crypt_protected_headers_subject");
659 mutt_write_one_header(fp, "Subject", c_crypt_protected_headers_subject,
660 NULL, 0, CH_NO_FLAGS, sub);
661 }
662 else
663 {
664 mutt_write_one_header(fp, "Subject", env->subject, NULL, 0, CH_NO_FLAGS, sub);
665 }
666 }
667 else if (mode == MUTT_WRITE_HEADER_EDITHDRS)
668 fputs("Subject:\n", fp);
669
670 /* save message id if the user has set it */
671 if (env->message_id && !privacy)
672 fprintf(fp, "Message-ID: %s\n", env->message_id);
673
674 if (!TAILQ_EMPTY(&env->reply_to))
675 {
676 mutt_addrlist_write_file(&env->reply_to, fp, "Reply-To");
677 }
678 else if (mode == MUTT_WRITE_HEADER_EDITHDRS)
679 fputs("Reply-To:\n", fp);
680
681 if (!TAILQ_EMPTY(&env->mail_followup_to))
682 {
683#ifdef USE_NNTP
684 if (!OptNewsSend)
685#endif
686 {
687 mutt_addrlist_write_file(&env->mail_followup_to, fp, "Mail-Followup-To");
688 }
689 }
690
691 /* Add any user defined headers */
692 struct UserHdrsOverride userhdrs_overrides = write_userhdrs(fp, &env->userhdrs,
693 privacy, sub);
694
695 if ((mode == MUTT_WRITE_HEADER_NORMAL) || (mode == MUTT_WRITE_HEADER_FCC) ||
697 {
698 if (!STAILQ_EMPTY(&env->references))
699 {
700 fputs("References:", fp);
701 mutt_write_references(&env->references, fp, 10);
702 fputc('\n', fp);
703 }
704
705 /* Add the MIME headers */
706 if (!userhdrs_overrides.is_overridden[USERHDRS_OVERRIDE_CONTENT_TYPE])
707 {
708 fputs("MIME-Version: 1.0\n", fp);
709 mutt_write_mime_header(attach, fp, sub);
710 }
711 }
712
713 if (!STAILQ_EMPTY(&env->in_reply_to))
714 {
715 fputs("In-Reply-To:", fp);
717 fputc('\n', fp);
718 }
719
720#ifdef USE_AUTOCRYPT
721 const bool c_autocrypt = cs_subset_bool(sub, "autocrypt");
722 if (c_autocrypt)
723 {
724 if (mode == MUTT_WRITE_HEADER_NORMAL || mode == MUTT_WRITE_HEADER_FCC)
726 if (mode == MUTT_WRITE_HEADER_MIME)
728 }
729#endif
730
731 const bool c_user_agent = cs_subset_bool(sub, "user_agent");
732 if (((mode == MUTT_WRITE_HEADER_NORMAL) || (mode == MUTT_WRITE_HEADER_FCC)) && !privacy &&
733 c_user_agent && !userhdrs_overrides.is_overridden[USERHDRS_OVERRIDE_USER_AGENT])
734 {
735 /* Add a vanity header */
736 fprintf(fp, "User-Agent: NeoMutt/%s%s\n", PACKAGE_VERSION, GitVer);
737 }
738
739 return (ferror(fp) == 0) ? 0 : -1;
740}
741
750int mutt_write_mime_header(struct Body *a, FILE *fp, struct ConfigSubset *sub)
751{
752 if (!a || !fp)
753 return -1;
754
755 int len;
756 int tmplen;
757 char buf[256] = { 0 };
758
759 char *id = NULL;
760
761 fprintf(fp, "Content-Type: %s/%s", TYPE(a), a->subtype);
762
763 if (!TAILQ_EMPTY(&a->parameter))
764 {
765 len = 25 + mutt_str_len(a->subtype); /* approximate len. of content-type */
766
767 struct Parameter *np = NULL;
768 TAILQ_FOREACH(np, &a->parameter, entries)
769 {
770 if (!np->attribute || !np->value)
771 continue;
772
773 struct ParameterList pl_conts = TAILQ_HEAD_INITIALIZER(pl_conts);
774 rfc2231_encode_string(&pl_conts, np->attribute, np->value);
775 struct Parameter *cont = NULL;
776 TAILQ_FOREACH(cont, &pl_conts, entries)
777 {
778 if (mutt_istr_equal(cont->attribute, "content-id"))
779 {
780 // Content-ID: gets its own header
781 mutt_str_replace(&id, cont->value);
782 break;
783 }
784
785 fputc(';', fp);
786
787 buf[0] = 0;
788 mutt_addr_cat(buf, sizeof(buf), cont->value, MimeSpecials);
789
790 /* Dirty hack to make messages readable by Outlook Express
791 * for the Mac: force quotes around the boundary parameter
792 * even when they aren't needed. */
793 if (mutt_istr_equal(cont->attribute, "boundary") && mutt_str_equal(buf, cont->value))
794 snprintf(buf, sizeof(buf), "\"%s\"", cont->value);
795
796 tmplen = mutt_str_len(buf) + mutt_str_len(cont->attribute) + 1;
797 if (len + tmplen + 2 > 76)
798 {
799 fputs("\n\t", fp);
800 len = tmplen + 1;
801 }
802 else
803 {
804 fputc(' ', fp);
805 len += tmplen + 1;
806 }
807
808 fprintf(fp, "%s=%s", cont->attribute, buf);
809 }
810
811 mutt_param_free(&pl_conts);
812 }
813 }
814
815 fputc('\n', fp);
816
817 if (id)
818 {
819 fprintf(fp, "Content-ID: <%s>\n", id);
820 mutt_mem_free(&id);
821 }
822
823 if (a->language)
824 fprintf(fp, "Content-Language: %s\n", a->language);
825
826 if (a->description)
827 fprintf(fp, "Content-Description: %s\n", a->description);
828
829 if (a->disposition != DISP_NONE)
830 {
831 const char *dispstr[] = { "inline", "attachment", "form-data" };
832
833 if (a->disposition < sizeof(dispstr) / sizeof(char *))
834 {
835 fprintf(fp, "Content-Disposition: %s", dispstr[a->disposition]);
836 len = 21 + mutt_str_len(dispstr[a->disposition]);
837
838 if (a->use_disp && ((a->disposition != DISP_INLINE) || a->d_filename))
839 {
840 char *fn = a->d_filename;
841 if (!fn)
842 fn = a->filename;
843
844 if (fn)
845 {
846 /* Strip off the leading path... */
847 char *t = strrchr(fn, '/');
848 if (t)
849 t++;
850 else
851 t = fn;
852
853 struct ParameterList pl_conts = TAILQ_HEAD_INITIALIZER(pl_conts);
854 rfc2231_encode_string(&pl_conts, "filename", t);
855 struct Parameter *cont = NULL;
856 TAILQ_FOREACH(cont, &pl_conts, entries)
857 {
858 fputc(';', fp);
859 buf[0] = 0;
860 mutt_addr_cat(buf, sizeof(buf), cont->value, MimeSpecials);
861
862 tmplen = mutt_str_len(buf) + mutt_str_len(cont->attribute) + 1;
863 if (len + tmplen + 2 > 76)
864 {
865 fputs("\n\t", fp);
866 len = tmplen + 1;
867 }
868 else
869 {
870 fputc(' ', fp);
871 len += tmplen + 1;
872 }
873
874 fprintf(fp, "%s=%s", cont->attribute, buf);
875 }
876
877 mutt_param_free(&pl_conts);
878 }
879 }
880
881 fputc('\n', fp);
882 }
883 else
884 {
885 mutt_debug(LL_DEBUG1, "ERROR: invalid content-disposition %d\n", a->disposition);
886 }
887 }
888
889 if (a->encoding != ENC_7BIT)
890 fprintf(fp, "Content-Transfer-Encoding: %s\n", ENCODING(a->encoding));
891
892 const bool c_crypt_protected_headers_write = cs_subset_bool(sub, "crypt_protected_headers_write");
893 bool c_autocrypt = false;
894#ifdef USE_AUTOCRYPT
895 c_autocrypt = cs_subset_bool(sub, "autocrypt");
896#endif
897
898 if ((c_crypt_protected_headers_write || c_autocrypt) && a->mime_headers)
899 {
901 false, false, sub);
902 }
903
904 /* Do NOT add the terminator here!!! */
905 return ferror(fp) ? -1 : 0;
906}
void mutt_addr_cat(char *buf, size_t buflen, const char *value, const char *specials)
Copy a string and wrap it in quotes if it contains special characters.
Definition: address.c:687
void mutt_addrlist_write_file(const struct AddressList *al, FILE *fp, const char *header)
Wrapper for mutt_write_address()
Definition: address.c:1234
Email Address Handling.
Autocrypt end-to-end encryption.
int mutt_autocrypt_write_gossip_headers(struct Envelope *env, FILE *fp)
Write the Autocrypt gossip headers to a file.
Definition: autocrypt.c:808
int mutt_autocrypt_write_autocrypt_header(struct Envelope *env, FILE *fp)
Write the Autocrypt header to a file.
Definition: autocrypt.c:770
static const char * mutt_buffer_string(const struct Buffer *buf)
Convert a buffer to a const char * "string".
Definition: buffer.h:78
const char * cs_subset_string(const struct ConfigSubset *sub, const char *name)
Get a string config item by name.
Definition: helpers.c:317
short cs_subset_number(const struct ConfigSubset *sub, const char *name)
Get a number config item by name.
Definition: helpers.c:169
bool cs_subset_bool(const struct ConfigSubset *sub, const char *name)
Get a boolean config item by name.
Definition: helpers.c:73
Convenience wrapper for the config headers.
#define CH_DISPLAY
Display result to user.
Definition: copy.h:70
uint32_t CopyHeaderFlags
Flags for mutt_copy_header(), e.g. CH_UPDATE.
Definition: copy.h:50
#define CH_NO_FLAGS
No flags are set.
Definition: copy.h:51
size_t mutt_strnwidth(const char *s, size_t n)
Measure a string's width in screen cells.
Definition: curs_lib.c:921
size_t mutt_strwidth(const char *s)
Measure a string's width in screen cells.
Definition: curs_lib.c:908
void mutt_date_make_date(struct Buffer *buf, bool local)
Write a date in RFC822 format to a buffer.
Definition: date.c:384
Structs that make up an email.
bool is_from(const char *s, char *path, size_t pathlen, time_t *tp)
Is a string a 'From' header line?
Definition: from.c:48
bool OptNewsSend
(pseudo) used to change behavior when posting
Definition: globals.c:79
const char * GitVer
#define mutt_debug(LEVEL,...)
Definition: logging.h:84
Convenience wrapper for the gui headers.
static int fold_one_header(FILE *fp, const char *tag, const char *value, size_t vlen, const char *pfx, int wraplen, CopyHeaderFlags chflags)
Fold one header line.
Definition: header.c:129
int mutt_rfc822_write_header(FILE *fp, struct Envelope *env, struct Body *attach, enum MuttWriteHeaderMode mode, bool privacy, bool hide_protected_subject, struct ConfigSubset *sub)
Write out one RFC822 header line.
Definition: header.c:571
static int userhdrs_override_cmp(const void *a, const void *b)
Compare a user-defined header with an element of the userhdrs_override_headers list.
Definition: header.c:271
static int write_one_header(FILE *fp, int pfxw, int max, int wraplen, const char *pfx, const char *start, const char *end, CopyHeaderFlags chflags)
Write out one header line.
Definition: header.c:291
int mutt_write_mime_header(struct Body *a, FILE *fp, struct ConfigSubset *sub)
Create a MIME header.
Definition: header.c:750
static char * unfold_header(char *s)
Unfold a wrapped email header.
Definition: header.c:234
static struct UserHdrsOverride write_userhdrs(FILE *fp, const struct ListHead *userhdrs, bool privacy, struct ConfigSubset *sub)
Write user-defined headers and keep track of the interesting ones.
Definition: header.c:360
static int print_val(FILE *fp, const char *pfx, const char *value, CopyHeaderFlags chflags, size_t col)
Add pieces to an email header, wrapping where necessary.
Definition: header.c:82
UserHdrsOverrideIdx
Headers that the user may override.
Definition: header.c:58
@ USERHDRS_OVERRIDE_CONTENT_TYPE
Override the "Content-Type".
Definition: header.c:59
@ USERHDRS_OVERRIDE_USER_AGENT
Override the "User-Agent".
Definition: header.c:60
static const char *const userhdrs_override_headers[]
The next array/enum pair is used to to keep track of user headers that override pre-defined headers N...
Definition: header.c:49
void mutt_write_references(const struct ListHead *r, FILE *fp, size_t trim)
Add the message references to a list.
Definition: header.c:513
int mutt_write_one_header(FILE *fp, const char *tag, const char *value, const char *pfx, int wraplen, CopyHeaderFlags chflags, struct ConfigSubset *sub)
Write one header line to a file.
Definition: header.c:419
Convenience wrapper for the send headers.
MuttWriteHeaderMode
Modes for mutt_rfc822_write_header()
Definition: header.h:39
@ MUTT_WRITE_HEADER_FCC
fcc mode, like normal mode but for Bcc header
Definition: header.h:41
@ MUTT_WRITE_HEADER_MIME
Write protected headers.
Definition: header.h:44
@ MUTT_WRITE_HEADER_NORMAL
A normal Email, write full header + MIME headers.
Definition: header.h:40
@ MUTT_WRITE_HEADER_POSTPONE
A postponed Email, just the envelope info.
Definition: header.h:42
@ MUTT_WRITE_HEADER_EDITHDRS
"light" mode (used for edit_hdrs)
Definition: header.h:43
@ LL_DEBUG5
Log at debug level 5.
Definition: logging.h:44
@ LL_DEBUG2
Log at debug level 2.
Definition: logging.h:41
@ LL_DEBUG1
Log at debug level 1.
Definition: logging.h:40
int mutt_mb_width(const char *str, int col, bool display)
Measure a string's display width (in screen columns)
Definition: mbyte.c:137
void * mutt_mem_calloc(size_t nmemb, size_t size)
Allocate zeroed memory on the heap.
Definition: memory.c:50
void mutt_mem_free(void *ptr)
Release memory allocated on the heap.
Definition: memory.c:68
#define FREE(x)
Definition: memory.h:43
#define MIN(a, b)
Definition: memory.h:31
#define mutt_array_size(x)
Definition: memory.h:36
const char MimeSpecials[]
Characters that need special treatment in MIME.
Definition: mime.c:67
@ ENC_7BIT
7-bit text
Definition: mime.h:49
@ DISP_INLINE
Content is inline.
Definition: mime.h:62
@ DISP_NONE
No preferred disposition.
Definition: mime.h:65
#define ENCODING(x)
Definition: mime.h:92
#define TYPE(body)
Definition: mime.h:89
Convenience wrapper for the library headers.
char * mutt_strn_dup(const char *begin, size_t len)
Duplicate a sub-string.
Definition: string.c:451
int mutt_istrn_cmp(const char *a, const char *b, size_t num)
Compare two strings ignoring case (to a maximum), safely.
Definition: string.c:510
bool mutt_istr_equal(const char *a, const char *b)
Compare two strings, ignoring case.
Definition: string.c:819
char * mutt_str_dup(const char *str)
Copy a string, safely.
Definition: string.c:250
char * mutt_str_skip_email_wsp(const char *s)
Skip over whitespace as defined by RFC5322.
Definition: string.c:679
bool mutt_str_equal(const char *a, const char *b)
Compare two strings.
Definition: string.c:807
const char * mutt_str_find_word(const char *src)
Find the end of a word (non-space)
Definition: string.c:907
size_t mutt_str_startswith(const char *str, const char *prefix)
Check whether a string starts with a prefix.
Definition: string.c:227
size_t mutt_str_len(const char *a)
Calculate the length of a string, safely.
Definition: string.c:567
size_t mutt_istr_startswith(const char *str, const char *prefix)
Check whether a string starts with a prefix, ignoring case.
Definition: string.c:239
char * mutt_str_replace(char **p, const char *s)
Replace one string with another.
Definition: string.c:326
void mutt_param_free(struct ParameterList *pl)
Free a ParameterList.
Definition: parameter.c:61
void mutt_buffer_pool_release(struct Buffer **pbuf)
Free a Buffer from the pool.
Definition: pool.c:112
struct Buffer * mutt_buffer_pool_get(void)
Get a Buffer from the pool.
Definition: pool.c:101
#define TAILQ_FOREACH(var, head, field)
Definition: queue.h:725
#define STAILQ_FOREACH(var, head, field)
Definition: queue.h:352
#define STAILQ_EMPTY(head)
Definition: queue.h:348
#define TAILQ_HEAD_INITIALIZER(head)
Definition: queue.h:637
#define TAILQ_EMPTY(head)
Definition: queue.h:721
size_t rfc2231_encode_string(struct ParameterList *head, const char *attribute, char *value)
Encode a string to be suitable for an RFC2231 header.
Definition: rfc2231.c:349
#define NONULL(x)
Definition: string2.h:37
The body of an email.
Definition: body.h:36
char * language
content-language (RFC8255)
Definition: body.h:77
char * d_filename
filename to be used for the content-disposition header If NULL, filename is used instead.
Definition: body.h:56
struct Envelope * mime_headers
Memory hole protected headers.
Definition: body.h:75
struct ParameterList parameter
Parameters of the content-type.
Definition: body.h:62
bool use_disp
Content-Disposition uses filename= ?
Definition: body.h:47
char * description
content-description
Definition: body.h:55
unsigned int disposition
content-disposition, ContentDisposition
Definition: body.h:42
char * subtype
content-type subtype
Definition: body.h:60
unsigned int encoding
content-transfer-encoding, ContentEncoding
Definition: body.h:41
char * filename
When sending a message, this is the file to which this structure refers.
Definition: body.h:58
String manipulation buffer.
Definition: buffer.h:34
A set of inherited config items.
Definition: subset.h:47
The header of an Email.
Definition: envelope.h:57
struct ListHead userhdrs
user defined headers
Definition: envelope.h:87
struct AddressList to
Email's 'To' list.
Definition: envelope.h:60
char * followup_to
List of 'followup-to' fields.
Definition: envelope.h:81
struct AddressList reply_to
Email's 'reply-to'.
Definition: envelope.h:64
char * message_id
Message ID.
Definition: envelope.h:73
char * x_comment_to
List of 'X-comment-to' fields.
Definition: envelope.h:82
char * newsgroups
List of newsgroups.
Definition: envelope.h:79
struct AddressList mail_followup_to
Email's 'mail-followup-to'.
Definition: envelope.h:65
struct AddressList cc
Email's 'Cc' list.
Definition: envelope.h:61
struct AddressList sender
Email's sender.
Definition: envelope.h:63
struct ListHead references
message references (in reverse order)
Definition: envelope.h:85
struct ListHead in_reply_to
in-reply-to header content
Definition: envelope.h:86
char * subject
Email's subject.
Definition: envelope.h:70
struct AddressList bcc
Email's 'Bcc' list.
Definition: envelope.h:62
struct AddressList from
Email's 'From' list.
Definition: envelope.h:59
A List node for strings.
Definition: list.h:35
char * data
String.
Definition: list.h:36
Attribute associated with a MIME part.
Definition: parameter.h:33
char * attribute
Parameter name.
Definition: parameter.h:34
char * value
Parameter value.
Definition: parameter.h:35
Which headers have been overridden.
Definition: header.c:67
bool is_overridden[mutt_array_size(userhdrs_override_headers)]
Which email headers have been overridden.
Definition: header.c:69