1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
2 *@ MIME support functions.
4 * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
5 * Copyright (c) 2012 - 2016 Steffen (Daode) Nurpmeso <steffen@sdaoden.eu>.
9 * Gunnar Ritter. All rights reserved.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by Gunnar Ritter
22 * and his contributors.
23 * 4. Neither the name of Gunnar Ritter nor the names of his contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY GUNNAR RITTER AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL GUNNAR RITTER OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 #ifndef HAVE_AMALGAMATION
46 static char *_cs_iter_base
, *_cs_iter
;
48 # define _CS_ITER_GET() ((_cs_iter != NULL) ? _cs_iter : charset_get_8bit())
50 # define _CS_ITER_GET() ((_cs_iter != NULL) ? _cs_iter : charset_get_lc())
52 #define _CS_ITER_STEP() _cs_iter = n_strsep(&_cs_iter_base, ',', TRU1)
54 /* Is 7-bit enough? */
56 static bool_t
_has_highbit(char const *s
);
57 static bool_t
_name_highbit(struct name
*np
);
60 /* fwrite(3) while checking for displayability */
61 static ssize_t
_fwrite_td(struct str
const *input
, enum tdflags flags
,
62 struct str
*outrest
, struct quoteflt
*qf
);
64 /* Convert header fields to RFC 1522 format and write to the file fo */
65 static ssize_t
mime_write_tohdr(struct str
*in
, FILE *fo
);
67 /* Write len characters of the passed string to the passed file, doing charset
68 * and header conversion */
69 static ssize_t
convhdra(char const *str
, size_t len
, FILE *fp
);
71 /* Write an address to a header field */
72 static ssize_t
mime_write_tohdr_a(struct str
*in
, FILE *f
);
74 /* Append to buf, handling resizing */
75 static void _append_str(char **buf
, size_t *sz
, size_t *pos
,
76 char const *str
, size_t len
);
77 static void _append_conv(char **buf
, size_t *sz
, size_t *pos
,
78 char const *str
, size_t len
);
82 _has_highbit(char const *s
)
100 _name_highbit(struct name
*np
)
106 if (_has_highbit(np
->n_name
) || _has_highbit(np
->n_fullname
))
115 #endif /* HAVE_ICONV */
117 static sigjmp_buf __mimefwtd_actjmp
; /* TODO someday.. */
118 static int __mimefwtd_sig
; /* TODO someday.. */
119 static sighandler_type __mimefwtd_opipe
;
121 __mimefwtd_onsig(int sig
) /* TODO someday, we won't need it no more */
123 NYD_X
; /* Signal handler */
124 __mimefwtd_sig
= sig
;
125 siglongjmp(__mimefwtd_actjmp
, 1);
129 _fwrite_td(struct str
const *input
, enum tdflags flags
, struct str
*outrest
,
132 /* TODO note: after send/MIME layer rewrite we will have a string pool
133 * TODO so that memory allocation count drops down massively; for now,
134 * TODO v14.* that is, we pay a lot & heavily depend on the allocator */
135 /* TODO well if we get a broken pipe here, and it happens to
136 * TODO happen pretty easy when sleeping in a full pipe buffer,
137 * TODO then the current codebase performs longjump away;
138 * TODO this leaves memory leaks behind ('think up to 3 per,
139 * TODO dep. upon alloca availability). For this to be fixed
140 * TODO we either need to get rid of the longjmp()s (tm) or
141 * TODO the storage must come from the outside or be tracked
142 * TODO in a carrier struct. Best both. But storage reuse
143 * TODO would be a bigbig win besides */
144 /* *input* _may_ point to non-modifyable buffer; but even then it only
145 * needs to be dup'ed away if we have to transform the content */
156 if ((flags
& TD_ICONV
) && iconvd
!= (iconv_t
)-1) {
159 if (outrest
!= NULL
&& outrest
->l
> 0) {
160 in
.l
= outrest
->l
+ input
->l
;
161 in
.s
= buf
= smalloc(in
.l
+1);
162 memcpy(in
.s
, outrest
->s
, outrest
->l
);
163 memcpy(&in
.s
[outrest
->l
], input
->s
, input
->l
);
167 if (n_iconv_str(iconvd
, n_ICONV_UNIDEFAULT
, &out
, &in
, &in
) != 0 &&
168 outrest
!= NULL
&& in
.l
> 0) {
169 n_iconv_reset(iconvd
);
170 /* Incomplete multibyte at EOF is special */
171 if (flags
& _TD_EOF
) {
172 out
.s
= srealloc(out
.s
, out
.l
+ sizeof(n_unirepl
));
173 if(options
& OPT_UNICODE
){
174 memcpy(&out
.s
[out
.l
], n_unirepl
, sizeof(n_unirepl
) -1);
175 out
.l
+= sizeof(n_unirepl
) -1;
177 out
.s
[out
.l
++] = '?';
179 n_str_add(outrest
, &in
);
184 flags
&= ~_TD_BUFCOPY
;
192 makeprint(&in
, &out
);
193 else if (flags
& _TD_BUFCOPY
)
194 n_str_dup(&out
, &in
);
197 if (flags
& TD_DELCTRL
)
198 out
.l
= delctrl(out
.s
, out
.l
);
201 __mimefwtd_opipe
= safe_signal(SIGPIPE
, &__mimefwtd_onsig
);
202 if (sigsetjmp(__mimefwtd_actjmp
, 1)) {
207 rv
= quoteflt_push(qf
, out
.s
, out
.l
);
212 if (in
.s
!= input
->s
)
214 safe_signal(SIGPIPE
, __mimefwtd_opipe
);
215 if (__mimefwtd_sig
!= 0)
216 n_raise(__mimefwtd_sig
);
222 mime_write_tohdr(struct str
*in
, FILE *fo
)
224 /* TODO mime_write_tohdr(): we don't know the name of our header->maxcol..
225 * TODO MIME/send layer rewrite: more available state!!
226 * TODO Because of this we cannot make a difference in between structured
227 * TODO and unstructured headers (RFC 2047, 5. (2))
228 * TODO NOT MULTIBYTE SAFE IF AN ENCODED WORD HAS TO BE SPLITTED!
229 * TODO To be better we had to mbtowc_l() (non-std! and no locale!!) and
230 * TODO work char-wise! -> S-CText..
231 * TODO The real problem for STD compatibility is however that "in" is
232 * TODO already iconv(3) encoded to the target character set! We could
233 * TODO also solve it (very expensively!) if we would narrow down to an
234 * TODO encoded word and then iconv(3)+MIME encode in one go, in which
235 * TODO case multibyte errors could be catched! */
237 /* Maximum line length *//* XXX we are too inflexible and could use
238 * XXX MIME_LINELEN unless an RFC 2047 encoding was actually used */
239 _MAXCOL
= MIME_LINELEN_RFC2047
242 _FIRST
= 1<<0, /* Nothing written yet, start of string */
243 _NO_QP
= 1<<1, /* No quoted-printable allowed */
244 _NO_B64
= 1<<2, /* Ditto, base64 */
245 _ENC_LAST
= 1<<3, /* Last round generated encoded word */
246 _SHOULD_BEE
= 1<<4, /* Avoid lines longer than SHOULD via encoding */
248 _RND_MASK
= (1<<_RND_SHIFT
) - 1,
249 _SPACE
= 1<<(_RND_SHIFT
+1), /* Leading whitespace */
250 _8BIT
= 1<<(_RND_SHIFT
+2), /* High bit set */
251 _ENCODE
= 1<<(_RND_SHIFT
+3), /* Need encoding */
252 _ENC_B64
= 1<<(_RND_SHIFT
+4), /* - let it be base64 */
253 _OVERLONG
= 1<<(_RND_SHIFT
+5) /* Temporarily rised limit */
256 struct str cout
, cin
;
257 char const *cset7
, *cset8
, *wbot
, *upper
, *wend
, *wcur
;
258 ui32_t cset7_len
, cset8_len
;
263 cout
.s
= NULL
, cout
.l
= 0;
264 cset7
= charset_get_7bit();
265 cset7_len
= (ui32_t
)strlen(cset7
);
266 cset8
= _CS_ITER_GET(); /* TODO MIME/send layer: iter active? iter! else */
267 cset8_len
= (ui32_t
)strlen(cset8
);
269 /* RFC 1468, "MIME Considerations":
270 * ISO-2022-JP may also be used in MIME Part 2 headers. The "B"
271 * encoding should be used with ISO-2022-JP text. */
272 /* TODO of course, our current implementation won't deal properly with
273 * TODO any stateful encoding at all... (the standard says each encoded
274 * TODO word must include all necessary reset sequences..., i.e., each
275 * TODO encoded word must be a self-contained iconv(3) life cycle) */
276 if (!asccasecmp(cset8
, "iso-2022-jp") || mime_enc_target() == MIMEE_B64
)
280 upper
= wbot
+ in
->l
;
281 col
= sizeof("Mail-Followup-To: ") -1; /* dreadful thing */
283 for (sz
= 0; wbot
< upper
; flags
&= ~_FIRST
, wbot
= wend
) {
286 while (wcur
< upper
&& whitechar(*wcur
)) {
291 /* Any occurrence of whitespace resets prevention of lines >SHOULD via
292 * enforced encoding (xxx SHOULD, but.. encoding is expensive!!) */
294 flags
&= ~_SHOULD_BEE
;
296 /* Data ends with WS - dump it and done.
297 * Also, if we have seen multiple successive whitespace characters, then
298 * if there was no encoded word last, i.e., if we can simply take them
299 * over to the output as-is, keep one WS for possible later separation
300 * purposes and simply print the others as-is, directly! */
305 if ((flags
& (_ENC_LAST
| _SPACE
)) == _SPACE
&& wcur
- wbot
> 1) {
310 /* Skip over a word to next non-whitespace, keep track along the way
311 * whether our 7-bit charset suffices to represent the data */
312 for (wend
= wcur
; wend
< upper
; ++wend
) {
313 if (whitechar(*wend
))
315 if ((uc_i
)*wend
& 0x80)
319 /* Decide whether the range has to become encoded or not */
320 i
= PTR2SIZE(wend
- wcur
);
321 j
= mime_enc_mustquote(wcur
, i
, MIMEEF_ISHEAD
);
322 /* If it just cannot fit on a SHOULD line length, force encode */
324 flags
|= _SHOULD_BEE
; /* (Sigh: SHOULD only, not MUST..) */
327 if ((flags
& _SHOULD_BEE
) || j
> 0) {
330 /* Use base64 if requested or more than 50% -37.5-% of the bytes of
331 * the string need to be encoded */
332 if ((flags
& _NO_QP
) || j
>= i
>> 1)/*(i >> 2) + (i >> 3))*/
335 DBG( if (flags
& _8BIT
) assert(flags
& _ENCODE
); )
337 if (!(flags
& _ENCODE
)) {
338 /* Encoded word produced, but no linear whitespace for necessary RFC
339 * 2047 separation? Generate artificial data (bad standard!) */
340 if ((flags
& (_ENC_LAST
| _SPACE
)) == _ENC_LAST
) {
341 if (col
>= _MAXCOL
) {
354 /* todo No effort here: (1) v15.0 has to bring complete rewrite,
355 * todo (2) the standard is braindead and (3) usually this is one
356 * todo word only, and why be smarter than the standard? */
358 i
= PTR2SIZE(wend
- wbot
);
359 if (i
+ col
<= (flags
& _OVERLONG
? MIME_LINELEN_MAX
: _MAXCOL
)) {
360 i
= fwrite(wbot
, sizeof *wbot
, i
, fo
);
366 /* Doesn't fit, try to break the line first; */
369 if (whitechar(*wbot
)) {
370 putc((uc_i
)*wbot
, fo
);
373 putc(' ', fo
); /* Bad standard: artificial data! */
380 /* It is so long that it needs to be broken, effectively causing
381 * artificial spaces to be inserted (bad standard), yuck */
382 /* todo This is not multibyte safe, as above; and completely stupid
383 * todo P.S.: our _SHOULD_BEE prevents these cases in the meanwhile */
384 /* FIXME OPT_UNICODE and parse using UTF-8 sync possibility! */
385 wcur
= wbot
+ MIME_LINELEN_MAX
- 8;
390 /* Encoding to encoded word(s); deal with leading whitespace, place
391 * a separator first as necessary: encoded words must always be
392 * separated from text and other encoded words with linear WS.
393 * And if an encoded word was last, intermediate whitespace must
394 * also be encoded, otherwise it would get stripped away! */
395 wcur
= n_UNCONST(n_empty
);
396 if ((flags
& (_ENC_LAST
| _SPACE
)) != _SPACE
) {
397 /* Reinclude whitespace */
399 /* We don't need to place a separator at the very beginning */
400 if (!(flags
& _FIRST
))
401 wcur
= n_UNCONST(" ");
406 pstate
|= PS_HEADER_NEEDED_MIME
;
409 * An 'encoded-word' may not be more than 75 characters long,
410 * including 'charset', 'encoding', 'encoded-text', and
411 * delimiters. If it is desirable to encode more text than will
412 * fit in an 'encoded-word' of 75 characters, multiple
413 * 'encoded-word's (separated by CRLF SPACE) may be used.
415 * While there is no limit to the length of a multiple-line
416 * header field, each line of a header field that contains one
417 * or more 'encoded-word's is limited to 76 characters */
419 cin
.s
= n_UNCONST(wbot
);
420 cin
.l
= PTR2SIZE(wend
- wbot
);
426 xout
= b64_encode(&cout
, &cin
, B64_ISHEAD
| B64_ISENCWORD
);
428 xout
= qp_encode(&cout
, &cin
, QP_ISHEAD
| QP_ISENCWORD
);
435 /* (Avoid trigraphs in the RFC 2047 placeholder..) */
436 i
= j
+ (flags
& _8BIT
? cset8_len
: cset7_len
) + sizeof("=!!B!!=") -1;
441 /* Unfortunately RFC 2047 explicitly disallows encoded words to be
442 * longer (just like RFC 5322's "a line SHOULD fit in 78 but MAY be
443 * 998 characters long"), so we cannot use the _OVERLONG mechanism,
444 * even though all tested mailers seem to support it */
445 if (i
+ col
<= (/*flags & _OVERLONG ? MIME_LINELEN_MAX :*/ _MAXCOL
)) {
446 fprintf(fo
, "%.1s=?%s?%c?%.*s?=",
447 wcur
, (flags
& _8BIT
? cset8
: cset7
),
448 (flags
& _ENC_B64
? 'B' : 'Q'),
449 (int)cout
.l
, cout
.s
);
455 /* Doesn't fit, try to break the line first */
456 /* TODO I've commented out the _FIRST test since we (1) cannot do
457 * TODO _OVERLONG since (MUAs support but) the standard disallows,
458 * TODO and because of our iconv problem i prefer an empty first line
459 * TODO in favour of a possibly messed up multibytes character. :-( */
460 if (col
> 1 /* TODO && !(flags & _FIRST)*/) {
464 if (!(flags
& _SPACE
)) {
466 wcur
= n_UNCONST(n_empty
);
467 /*flags |= _OVERLONG;*/
468 goto jenc_retry_same
;
470 putc((uc_i
)*wcur
, fo
);
471 if (whitechar(*(wcur
= wbot
)))
475 wcur
= n_UNCONST(n_empty
);
477 /*flags &= ~_OVERLONG;*/
482 /* It is so long that it needs to be broken, effectively causing
483 * artificial data to be inserted (bad standard), yuck */
484 /* todo This is not multibyte safe, as above */
485 /*if (!(flags & _OVERLONG)) { Mechanism explicitly forbidden by 2047
490 /* FIXME OPT_UNICODE and parse using UTF-8 sync possibility! */
491 i
= PTR2SIZE(wend
- wbot
) + !!(flags
& _SPACE
);
492 j
= 3 + !(flags
& _ENC_B64
);
496 /* (Note the problem most likely is the transfer-encoding blow,
497 * which is why we test this *after* the decrements.. */
512 convhdra(char const *str
, size_t len
, FILE *fp
)
521 cin
.s
= n_UNCONST(str
);
525 if (iconvd
!= (iconv_t
)-1) {
527 if(n_iconv_str(iconvd
, n_ICONV_IGN_NOREVERSE
, &ciconv
, &cin
, NULL
) != 0){
528 n_iconv_reset(iconvd
);
534 ret
= mime_write_tohdr(&cin
, fp
);
537 if (ciconv
.s
!= NULL
)
545 mime_write_tohdr_a(struct str
*in
, FILE *f
) /* TODO error handling */
547 char const *cp
, *lastcp
;
553 if ((cp
= routeaddr(in
->s
)) != NULL
&& cp
> lastcp
) {
554 if ((sz
= convhdra(lastcp
, PTR2SIZE(cp
- lastcp
), f
)) < 0)
562 for ( ; *cp
!= '\0'; ++cp
) {
565 sz
+= fwrite(lastcp
, 1, PTR2SIZE(cp
- lastcp
+ 1), f
);
567 cp
= skip_comment(cp
);
569 if ((x
= convhdra(lastcp
, PTR2SIZE(cp
- lastcp
), f
)) < 0) {
581 if (*cp
== '\\' && cp
[1] != '\0')
588 sz
+= fwrite(lastcp
, 1, PTR2SIZE(cp
- lastcp
), f
);
595 _append_str(char **buf
, size_t *sz
, size_t *pos
, char const *str
, size_t len
)
598 *buf
= srealloc(*buf
, *sz
+= len
);
599 memcpy(&(*buf
)[*pos
], str
, len
);
605 _append_conv(char **buf
, size_t *sz
, size_t *pos
, char const *str
, size_t len
)
610 in
.s
= n_UNCONST(str
);
612 mime_fromhdr(&in
, &out
, TD_ISPR
| TD_ICONV
);
613 _append_str(buf
, sz
, pos
, out
.s
, out
.l
);
619 charset_get_7bit(void)
624 if ((t
= ok_vlook(charset_7bit
)) == NULL
)
630 for(t
= cp
; *cp
!= '\0'; ++cp
)
631 *cp
= lowerconv(*cp
);
639 charset_get_8bit(void)
644 if ((t
= ok_vlook(CHARSET_8BIT_OKEY
)) == NULL
)
650 for(t
= cp
; *cp
!= '\0'; ++cp
)
651 *cp
= lowerconv(*cp
);
664 if ((t
= ok_vlook(ttycharset
)) == NULL
)
670 for(t
= cp
; *cp
!= '\0'; ++cp
)
671 *cp
= lowerconv(*cp
);
678 charset_iter_reset(char const *a_charset_to_try_first
)
681 size_t sarrl
[3], len
;
684 n_UNUSED(a_charset_to_try_first
);
687 sarr
[0] = a_charset_to_try_first
;
688 if ((sarr
[1] = ok_vlook(sendcharsets
)) == NULL
&&
689 ok_blook(sendcharsets_else_ttycharset
))
690 sarr
[1] = charset_get_lc();
691 sarr
[2] = charset_get_8bit();
693 sarr
[2] = charset_get_lc();
696 sarrl
[2] = len
= strlen(sarr
[2]);
698 if ((cp
= n_UNCONST(sarr
[1])) != NULL
)
699 len
+= (sarrl
[1] = strlen(cp
));
702 if ((cp
= n_UNCONST(sarr
[0])) != NULL
)
703 len
+= (sarrl
[0] = strlen(cp
));
708 _cs_iter_base
= cp
= salloc(len
+ 1 + 1 +1);
711 if ((len
= sarrl
[0]) != 0) {
712 memcpy(cp
, sarr
[0], len
);
716 if ((len
= sarrl
[1]) != 0) {
717 memcpy(cp
, sarr
[1], len
);
723 memcpy(cp
, sarr
[2], len
);
728 return (_cs_iter
!= NULL
);
732 charset_iter_next(void)
738 rv
= (_cs_iter
!= NULL
);
744 charset_iter_is_valid(void)
749 rv
= (_cs_iter
!= NULL
);
766 charset_iter_or_fallback(void)
777 charset_iter_recurse(char *outer_storage
[2]) /* TODO LEGACY FUN, REMOVE */
780 outer_storage
[0] = _cs_iter_base
;
781 outer_storage
[1] = _cs_iter
;
786 charset_iter_restore(char *outer_storage
[2]) /* TODO LEGACY FUN, REMOVE */
789 _cs_iter_base
= outer_storage
[0];
790 _cs_iter
= outer_storage
[1];
796 need_hdrconv(struct header
*hp
) /* TODO once only, then iter */
798 struct n_header_field
*hfp
;
804 if((hfp
= hp
->h_user_headers
) != NULL
)
805 do if(_has_highbit(hfp
->hf_dat
+ hfp
->hf_nl
+1))
807 while((hfp
= hfp
->hf_next
) != NULL
);
809 if((hfp
= hp
->h_custom_headers
) != NULL
||
810 (hp
->h_custom_headers
= hfp
= n_customhdr_query()) != NULL
)
811 do if(_has_highbit(hfp
->hf_dat
+ hfp
->hf_nl
+1))
813 while((hfp
= hfp
->hf_next
) != NULL
);
815 if (hp
->h_mft
!= NULL
) {
816 if (_name_highbit(hp
->h_mft
))
819 if (hp
->h_from
!= NULL
) {
820 if (_name_highbit(hp
->h_from
))
822 } else if (_has_highbit(myaddrs(NULL
)))
825 if (_name_highbit(hp
->h_replyto
))
827 } else if (_has_highbit(ok_vlook(replyto
)))
830 if (_name_highbit(hp
->h_sender
))
832 } else if (_has_highbit(ok_vlook(sender
)))
835 if (_name_highbit(hp
->h_to
))
837 if (_name_highbit(hp
->h_cc
))
839 if (_name_highbit(hp
->h_bcc
))
841 if (_has_highbit(hp
->h_subject
))
843 rv
= _CS_ITER_GET(); /* TODO MIME/send: iter active? iter! else */
847 #endif /* HAVE_ICONV */
850 mime_fromhdr(struct str
const *in
, struct str
*out
, enum tdflags flags
)
852 /* TODO mime_fromhdr(): is called with strings that contain newlines;
853 * TODO this is the usual newline problem all around the codebase;
854 * TODO i.e., if we strip it, then the display misses it ;>
855 * TODO this is why it is so messy and why S-nail v14.2 plus additional
856 * TODO patch for v14.5.2 (and maybe even v14.5.3 subminor) occurred, and
857 * TODO why our display reflects what is contained in the message: the 1:1
858 * TODO relationship of message content and display!
859 * TODO instead a header line should be decoded to what it is (a single
860 * TODO line that is) and it should be objective to the backend whether
861 * TODO it'll be folded to fit onto the display or not, e.g., for search
862 * TODO purposes etc. then the only condition we have to honour in here
863 * TODO is that whitespace in between multiple adjacent MIME encoded words
864 * TODO á la RFC 2047 is discarded; i.e.: this function should deal with
865 * TODO RFC 2047 and be renamed: mime_fromhdr() -> mime_rfc2047_decode() */
866 struct str cin
, cout
;
867 char *p
, *op
, *upper
;
868 ui32_t convert
, lastenc
, lastoutl
;
872 iconv_t fhicd
= (iconv_t
)-1;
878 *(out
->s
= smalloc(1)) = '\0';
884 tcs
= charset_get_lc();
888 lastenc
= lastoutl
= 0;
892 if (*p
== '=' && *(p
+ 1) == '?') {
897 while (p
< upper
&& *p
!= '?')
898 ++p
; /* strip charset */
903 if (flags
& TD_ICONV
) {
904 size_t i
= PTR2SIZE(p
- cbeg
);
905 char *ltag
, *cs
= ac_alloc(i
);
907 memcpy(cs
, cbeg
, --i
);
909 /* RFC 2231 extends the RFC 2047 character set definition in
910 * encoded words by language tags - silently strip those off */
911 if ((ltag
= strchr(cs
, '*')) != NULL
)
914 if (fhicd
!= (iconv_t
)-1)
915 n_iconv_close(fhicd
);
916 fhicd
= asccasecmp(cs
, tcs
) ? n_iconv_open(tcs
, cs
) : (iconv_t
)-1;
922 convert
= CONV_FROMB64
;
925 convert
= CONV_FROMQP
;
927 default: /* invalid, ignore */
935 if (PTRCMP(p
+ 1, >=, upper
))
937 if (*p
++ == '?' && *p
== '=')
946 if (convert
== CONV_FROMB64
) {
947 if(!b64_decode_header(&cout
, &cin
))
948 n_str_assign_cp(&cout
, _("[Invalid Base64 encoding]"));
949 }else if(!qp_decode_header(&cout
, &cin
))
950 n_str_assign_cp(&cout
, _("[Invalid Quoted-Printable encoding]"));
954 if ((flags
& TD_ICONV
) && fhicd
!= (iconv_t
)-1) {
955 cin
.s
= NULL
, cin
.l
= 0; /* XXX string pool ! */
956 convert
= n_iconv_str(fhicd
, n_ICONV_UNIDEFAULT
, &cin
, &cout
, NULL
);
957 out
= n_str_add(out
, &cin
);
958 if (convert
) {/* EINVAL at EOS */
959 n_iconv_reset(fhicd
);
960 out
= n_str_add_buf(out
, "?", 1); /* TODO unicode replacement */
965 out
= n_str_add(out
, &cout
);
966 lastenc
= lastoutl
= out
->l
;
973 onlyws
= (lastenc
> 0);
977 if (op
[0] == '=' && (PTRCMP(op
+ 1, ==, upper
) || op
[1] == '?'))
979 if (onlyws
&& !blankchar(*op
))
983 out
= n_str_add_buf(out
, p
, PTR2SIZE(op
- p
));
985 if (!onlyws
|| lastoutl
!= lastenc
)
990 out
->s
[out
->l
] = '\0';
992 if (flags
& TD_ISPR
) {
993 makeprint(out
, &cout
);
997 if (flags
& TD_DELCTRL
)
998 out
->l
= delctrl(out
->s
, out
->l
);
1000 if (fhicd
!= (iconv_t
)-1)
1001 n_iconv_close(fhicd
);
1009 mime_fromaddr(char const *name
)
1011 char const *cp
, *lastcp
;
1013 size_t ressz
= 1, rescur
= 0;
1018 if (*name
== '\0') {
1019 res
= savestr(name
);
1023 if ((cp
= routeaddr(name
)) != NULL
&& cp
> name
) {
1024 _append_conv(&res
, &ressz
, &rescur
, name
, PTR2SIZE(cp
- name
));
1029 for ( ; *cp
; ++cp
) {
1032 _append_str(&res
, &ressz
, &rescur
, lastcp
, PTR2SIZE(cp
- lastcp
+ 1));
1034 cp
= skip_comment(cp
);
1036 _append_conv(&res
, &ressz
, &rescur
, lastcp
, PTR2SIZE(cp
- lastcp
));
1043 if (*cp
== '\\' && cp
[1] != '\0')
1050 _append_str(&res
, &ressz
, &rescur
, lastcp
, PTR2SIZE(cp
- lastcp
));
1051 /* TODO rescur==0: inserted to silence Coverity ...; check that */
1053 res
= n_UNCONST(n_empty
);
1066 xmime_write(char const *ptr
, size_t size
, FILE *f
, enum conversion convert
,
1067 enum tdflags dflags
)
1070 struct quoteflt
*qf
;
1073 quoteflt_reset(qf
= quoteflt_dummy(), f
);
1074 rv
= mime_write(ptr
, size
, f
, convert
, dflags
, qf
, NULL
, NULL
);
1080 static sigjmp_buf __mimemw_actjmp
; /* TODO someday.. */
1081 static int __mimemw_sig
; /* TODO someday.. */
1082 static sighandler_type __mimemw_opipe
;
1084 __mimemw_onsig(int sig
) /* TODO someday, we won't need it no more */
1086 NYD_X
; /* Signal handler */
1088 siglongjmp(__mimemw_actjmp
, 1);
1092 mime_write(char const *ptr
, size_t size
, FILE *f
,
1093 enum conversion convert
, enum tdflags
volatile dflags
,
1094 struct quoteflt
*qf
, struct str
* volatile outrest
,
1095 struct str
* volatile inrest
)
1097 /* TODO note: after send/MIME layer rewrite we will have a string pool
1098 * TODO so that memory allocation count drops down massively; for now,
1099 * TODO v14.0 that is, we pay a lot & heavily depend on the allocator */
1101 ssize_t
volatile sz
;
1104 dflags
|= _TD_BUFCOPY
;
1106 in
.s
= n_UNCONST(ptr
);
1108 if(inrest
!= NULL
&& inrest
->l
> 0){
1109 out
.s
= smalloc(inrest
->l
+ size
+ 1);
1110 memcpy(out
.s
, inrest
->s
, inrest
->l
);
1112 memcpy(&out
.s
[inrest
->l
], in
.s
, size
);
1115 (in
.s
= out
.s
)[in
.l
= size
] = '\0';
1116 dflags
&= ~_TD_BUFCOPY
;
1122 if ((sz
= size
) == 0) {
1123 if (outrest
!= NULL
&& outrest
->l
!= 0)
1129 if ((dflags
& TD_ICONV
) && iconvd
!= (iconv_t
)-1 &&
1130 (convert
== CONV_TOQP
|| convert
== CONV_8BIT
||
1131 convert
== CONV_TOB64
|| convert
== CONV_TOHDR
)) {
1132 if (n_iconv_str(iconvd
, n_ICONV_IGN_NOREVERSE
, &out
, &in
, NULL
) != 0) {
1133 n_iconv_reset(iconvd
);
1134 /* TODO This causes hard-failure. We would need to have an action
1135 * TODO policy FAIL|IGNORE|SETERROR(but continue). Better huh? */
1141 dflags
&= ~_TD_BUFCOPY
;
1147 __mimemw_opipe
= safe_signal(SIGPIPE
, &__mimemw_onsig
);
1148 if (sigsetjmp(__mimemw_actjmp
, 1))
1153 if(!qp_decode_text(&out
, &in
, outrest
, inrest
)){
1154 n_err(_("Invalid Quoted-Printable encoding ignored\n"));
1155 sz
= 0; /* TODO sz = -1 stops outer levels! */
1160 if(qp_encode(&out
, &in
, QP_NONE
) == NULL
){
1161 sz
= 0; /* TODO sz = -1 stops outer levels! */
1166 sz
= quoteflt_push(qf
, in
.s
, in
.l
);
1169 if(!b64_decode_text(&out
, &in
, outrest
, inrest
))
1174 case CONV_FROMB64_T
:
1175 if(!b64_decode_text(&out
, &in
, outrest
, inrest
)){
1177 n_err(_("Invalid Base64 encoding ignored\n"));
1178 sz
= 0; /* TODO sz = -1 stops outer levels! */
1183 if ((sz
= out
.l
) != 0) {
1184 ui32_t opl
= qf
->qf_pfix_len
;
1185 sz
= _fwrite_td(&out
, (dflags
& ~_TD_BUFCOPY
), outrest
, qf
);
1186 qf
->qf_pfix_len
= opl
;
1190 if(b64_encode(&out
, &in
, B64_LF
| B64_MULTILINE
) == NULL
){
1195 sz
= fwrite(out
.s
, sizeof *out
.s
, out
.l
, f
);
1196 if (sz
!= (ssize_t
)out
.l
)
1200 mime_fromhdr(&in
, &out
, TD_ISPR
| TD_ICONV
| (dflags
& TD_DELCTRL
));
1201 sz
= quoteflt_push(qf
, out
.s
, out
.l
);
1204 sz
= mime_write_tohdr(&in
, f
);
1207 sz
= mime_write_tohdr_a(&in
, f
);
1210 sz
= _fwrite_td(&in
, dflags
, NULL
, qf
);
1218 safe_signal(SIGPIPE
, __mimemw_opipe
);
1219 if (__mimemw_sig
!= 0)
1220 n_raise(__mimemw_sig
);