2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or (at
5 * your option) any later version.
7 * This program is distributed in the hope that it will be useful, but
8 * WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
10 * General Public License for more details.
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
17 * Copyright © 2006 Pierre Habouzit
21 * Copyright notice from original mutt:
22 * Copyright (C) 1999-2000 Thomas Roessler <roessler@does-not-exist.org>
24 * This file is part of mutt-ng, see http://www.muttng.org/.
25 * It's licensed under the GNU General Public License,
26 * please see the file GPL in the top level source directory.
30 * Yet another MIME encoding for header data. This time, it's
31 * parameters, specified in RFC 2231, and modeled after the
32 * encoding used in URLs.
34 * Additionally, continuations and encoding are mixed in an, errrm,
43 #include <lib-lib/lib-lib.h>
45 #include <lib-mime/mime.h>
50 typedef struct rfc2231_param {
51 struct rfc2231_param *next;
59 DO_INIT(rfc2231_param, rfc2231_param);
60 static inline void rfc2231_param_wipe(rfc2231_param *param)
62 p_delete(¶m->attribute);
63 p_delete(¶m->value);
65 DO_NEW(rfc2231_param, rfc2231_param);
66 DO_DELETE(rfc2231_param, rfc2231_param);
68 /* TODO: MC: replace with a str_unescape */
69 static void rfc2231_decode_one(char *dst, const char *src)
75 && (h1 = hexval(src[1])) >= 0 && (h2 = hexval(src[2])) >= 0)
77 *dst++ = (h1 << 4) | h2;
87 /* read the <charset>'foo' part into charset, and skip that */
88 static char *rfc2231_get_charset(char *value, char *charset, size_t chslen)
92 t = strchr(value, '\'');
99 m_strcpy(charset, chslen, value);
101 if ((u = strchr(t + 1, '\''))) {
109 /* insert parameter into an ordered list.
111 * Primary sorting key: attribute
112 * Secondary sorting key: idx
114 * XXX: MC: looks very unclear to me
117 rfc2231_list_insert(rfc2231_param **list, rfc2231_param *par)
122 rfc2231_param *q = *list;
124 list = &(*list)->next;
126 c = m_strcmp(par->value, q->value);
127 if ((c > 0) || (c == 0 && par->idx >= q->idx))
135 static void purge_empty_parameters(parameter_t **headp)
138 parameter_t *p = *headp;
140 if (!p->attribute || !p->value) {
141 p = parameter_list_pop(headp);
142 parameter_delete(&p);
144 headp = &(*headp)->next;
149 /* process continuation parameters */
150 /* XXX: MC: not read */
152 rfc2231_join_continuations(parameter_t **head, rfc2231_param *par)
156 char attribute[STRING];
157 char charset[STRING];
168 m_strcpy(attribute, sizeof(attribute), par->attribute);
170 if ((encoded = par->encoded))
171 valp = rfc2231_get_charset (par->value, charset, sizeof (charset));
176 if (encoded && par->encoded)
177 rfc2231_decode_one (par->value, valp);
179 vl = m_strlen(par->value);
181 p_realloc(&value, l + vl + 1);
182 strcpy (value + l, par->value); /* __STRCPY_CHECKED__ */
186 rfc2231_param_delete (&par);
189 } while (par && !m_strcmp(par->attribute, attribute));
193 mutt_convert_string (&value, charset, Charset, M_ICONV_HOOK_FROM);
194 *head = parameter_new();
195 (*head)->attribute = m_strdup(attribute);
196 (*head)->value = value;
197 head = &(*head)->next;
202 /****************************************************************************/
204 /****************************************************************************/
206 /* XXX: MC: not read */
207 void rfc2231_decode_parameters (parameter_t ** headp)
209 parameter_t *head = NULL;
213 rfc2231_param *conthead = NULL;
214 rfc2231_param *conttmp;
217 char charset[STRING];
221 short dirty = 0; /* 1 when we may have created empty parameters. */
226 purge_empty_parameters (headp);
228 for (last = &head, p = *headp; p; p = q) {
231 if (!(s = strchr (p->attribute, '*'))) {
234 * Using RFC 2047 encoding in MIME parameters is explicitly
235 * forbidden by that document. Nevertheless, it's being
236 * generated by some software, including certain Lotus Notes to
237 * Internet Gateways. So we actually decode it.
240 if (option (OPTRFC2047PARAMS) && p->value && strstr (p->value, "=?"))
241 rfc2047_decode (&p->value);
242 else if (!option (OPTSTRICTMIME)) {
243 if (mime_which_token(AssumedCharset, -1) == MIME_US_ASCII)
244 mutt_convert_nonmime_string(&p->value);
251 else if (*(s + 1) == '\0') {
254 s = rfc2231_get_charset (p->value, charset, sizeof (charset));
255 rfc2231_decode_one (p->value, s);
256 mutt_convert_string (&p->value, charset, Charset, M_ICONV_HOOK_FROM);
266 s++; /* let s point to the first character of idx. */
267 for (t = s; *t && isdigit ((unsigned char) *t); t++);
268 encoded = (*t == '*');
273 conttmp = rfc2231_param_new ();
274 conttmp->attribute = p->attribute;
275 conttmp->value = p->value;
276 conttmp->encoded = encoded;
283 rfc2231_list_insert (&conthead, conttmp);
288 rfc2231_join_continuations (last, conthead);
295 purge_empty_parameters (headp);
298 #define RFC2231_SPECIALS "@.,;:<>[]\\\"()?/= \t*'%"
300 int rfc2231_encode_string(char **s)
302 char *charset = NULL;
303 char *e, *p, *t, *d = NULL;
308 * A shortcut to detect pure 7bit data.
310 * This should prevent the worst when character set handling is flawed.
313 for (p = *s; ; p++) {
320 if (Charset && SendCharset) {
321 charset = mutt_choose_charset(Charset, SendCharset,
322 *s, m_strlen(*s), &d, &dlen);
326 charset = m_strdup(Charset ? Charset : "unknown-8bit");
331 for (p = d; *p; p++) {
332 if (*p < 0x20 || *p >= 0x7f || strchr(RFC2231_SPECIALS, *p)) {
337 e = p_new(char, dlen + 2 * escapes + m_strlen(charset) + 3);
339 t = e + sprintf(e, "%s''", charset);
340 for (p = d; *p; p++) {
341 if (*p < 0x20 || *p >= 0x7f || strchr(RFC2231_SPECIALS, *p)) {
343 *t++ = __m_b36chars_upper[*p >> 4];
344 *t++ = __m_b36chars_upper[*p & 0xf];