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-rw-r--r--src/lib/libcrypto/pkcs7/pk7_mime.c673
1 files changed, 0 insertions, 673 deletions
diff --git a/src/lib/libcrypto/pkcs7/pk7_mime.c b/src/lib/libcrypto/pkcs7/pk7_mime.c
deleted file mode 100644
index 734643be28..0000000000
--- a/src/lib/libcrypto/pkcs7/pk7_mime.c
+++ /dev/null
@@ -1,673 +0,0 @@
1/* pk7_mime.c */
2/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
3 * project 1999.
4 */
5/* ====================================================================
6 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59#include <stdio.h>
60#include <ctype.h>
61#include "cryptlib.h"
62#include <openssl/rand.h>
63#include <openssl/x509.h>
64
65/* MIME and related routines */
66
67/* MIME format structures
68 * Note that all are translated to lower case apart from
69 * parameter values. Quotes are stripped off
70 */
71
72typedef struct {
73char *name; /* Name of line e.g. "content-type" */
74char *value; /* Value of line e.g. "text/plain" */
75STACK /* MIME_PARAM */ *params; /* Zero or more parameters */
76} MIME_HEADER;
77
78typedef struct {
79char *param_name; /* Param name e.g. "micalg" */
80char *param_value; /* Param value e.g. "sha1" */
81} MIME_PARAM;
82
83
84static int B64_write_PKCS7(BIO *bio, PKCS7 *p7);
85static PKCS7 *B64_read_PKCS7(BIO *bio);
86static char * strip_ends(char *name);
87static char * strip_start(char *name);
88static char * strip_end(char *name);
89static MIME_HEADER *mime_hdr_new(char *name, char *value);
90static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value);
91static STACK *mime_parse_hdr(BIO *bio);
92static int mime_hdr_cmp(MIME_HEADER **a, MIME_HEADER **b);
93static int mime_param_cmp(MIME_PARAM **a, MIME_PARAM **b);
94static void mime_param_free(MIME_PARAM *param);
95static int mime_bound_check(char *line, int linelen, char *bound, int blen);
96static int multi_split(BIO *bio, char *bound, STACK **ret);
97static int iscrlf(char c);
98static MIME_HEADER *mime_hdr_find(STACK *hdrs, char *name);
99static MIME_PARAM *mime_param_find(MIME_HEADER *hdr, char *name);
100static void mime_hdr_free(MIME_HEADER *hdr);
101
102#define MAX_SMLEN 1024
103#define mime_debug(x) /* x */
104
105
106typedef void (*stkfree)();
107
108/* Base 64 read and write of PKCS#7 structure */
109
110static int B64_write_PKCS7(BIO *bio, PKCS7 *p7)
111{
112 BIO *b64;
113 if(!(b64 = BIO_new(BIO_f_base64()))) {
114 PKCS7err(PKCS7_F_B64_WRITE_PKCS7,ERR_R_MALLOC_FAILURE);
115 return 0;
116 }
117 bio = BIO_push(b64, bio);
118 i2d_PKCS7_bio(bio, p7);
119 BIO_flush(bio);
120 bio = BIO_pop(bio);
121 BIO_free(b64);
122 return 1;
123}
124
125static PKCS7 *B64_read_PKCS7(BIO *bio)
126{
127 BIO *b64;
128 PKCS7 *p7;
129 if(!(b64 = BIO_new(BIO_f_base64()))) {
130 PKCS7err(PKCS7_F_B64_READ_PKCS7,ERR_R_MALLOC_FAILURE);
131 return 0;
132 }
133 bio = BIO_push(b64, bio);
134 if(!(p7 = d2i_PKCS7_bio(bio, NULL)))
135 PKCS7err(PKCS7_F_B64_READ_PKCS7,PKCS7_R_DECODE_ERROR);
136 BIO_flush(bio);
137 bio = BIO_pop(bio);
138 BIO_free(b64);
139 return p7;
140}
141
142/* SMIME sender */
143
144int SMIME_write_PKCS7(BIO *bio, PKCS7 *p7, BIO *data, int flags)
145{
146 char linebuf[MAX_SMLEN];
147 char bound[33], c;
148 int i;
149 if((flags & PKCS7_DETACHED) && data) {
150 /* We want multipart/signed */
151 /* Generate a random boundary */
152 RAND_pseudo_bytes((unsigned char *)bound, 32);
153 for(i = 0; i < 32; i++) {
154 c = bound[i] & 0xf;
155 if(c < 10) c += '0';
156 else c += 'A' - 10;
157 bound[i] = c;
158 }
159 bound[32] = 0;
160 BIO_printf(bio, "MIME-Version: 1.0\n");
161 BIO_printf(bio, "Content-Type: multipart/signed ; ");
162 BIO_printf(bio, "protocol=\"application/x-pkcs7-signature\" ; ");
163 BIO_printf(bio, "micalg=sha1 ; boundary=\"----%s\"\n\n", bound);
164 BIO_printf(bio, "This is an S/MIME signed message\n\n");
165 /* Now write out the first part */
166 BIO_printf(bio, "------%s\r\n", bound);
167 if(flags & PKCS7_TEXT) BIO_printf(bio, "Content-Type: text/plain\n\n");
168 while((i = BIO_read(data, linebuf, MAX_SMLEN)) > 0)
169 BIO_write(bio, linebuf, i);
170 BIO_printf(bio, "\n------%s\n", bound);
171
172 /* Headers for signature */
173
174 BIO_printf(bio, "Content-Type: application/x-pkcs7-signature; name=\"smime.p7s\"\n");
175 BIO_printf(bio, "Content-Transfer-Encoding: base64\n");
176 BIO_printf(bio, "Content-Disposition: attachment; filename=\"smime.p7s\"\n\n");
177 B64_write_PKCS7(bio, p7);
178 BIO_printf(bio,"\n------%s--\n\n", bound);
179 return 1;
180 }
181 /* MIME headers */
182 BIO_printf(bio, "MIME-Version: 1.0\n");
183 BIO_printf(bio, "Content-Disposition: attachment; filename=\"smime.p7m\"\n");
184 BIO_printf(bio, "Content-Type: application/x-pkcs7-mime; name=\"smime.p7m\"\n");
185 BIO_printf(bio, "Content-Transfer-Encoding: base64\n\n");
186 B64_write_PKCS7(bio, p7);
187 BIO_printf(bio, "\n");
188 return 1;
189}
190
191/* SMIME reader: handle multipart/signed and opaque signing.
192 * in multipart case the content is placed in a memory BIO
193 * pointed to by "bcont". In opaque this is set to NULL
194 */
195
196PKCS7 *SMIME_read_PKCS7(BIO *bio, BIO **bcont)
197{
198 BIO *p7in;
199 STACK *headers = NULL;
200 STACK *parts = NULL;
201 MIME_HEADER *hdr;
202 MIME_PARAM *prm;
203 PKCS7 *p7;
204 int ret;
205
206 if(bcont) *bcont = NULL;
207
208 if (!(headers = mime_parse_hdr(bio))) {
209 PKCS7err(PKCS7_F_SMIME_READ_PKCS7,PKCS7_R_MIME_PARSE_ERROR);
210 return NULL;
211 }
212
213 if(!(hdr = mime_hdr_find(headers, "content-type")) || !hdr->value) {
214 sk_pop_free(headers, mime_hdr_free);
215 PKCS7err(PKCS7_F_SMIME_READ_PKCS7, PKCS7_R_NO_CONTENT_TYPE);
216 return NULL;
217 }
218
219 /* Handle multipart/signed */
220
221 if(!strcmp(hdr->value, "multipart/signed")) {
222 /* Split into two parts */
223 prm = mime_param_find(hdr, "boundary");
224 if(!prm || !prm->param_value) {
225 sk_pop_free(headers, mime_hdr_free);
226 PKCS7err(PKCS7_F_SMIME_READ_PKCS7, PKCS7_R_NO_MULTIPART_BOUNDARY);
227 return NULL;
228 }
229 ret = multi_split(bio, prm->param_value, &parts);
230 sk_pop_free(headers, mime_hdr_free);
231 if(!ret || (sk_num(parts) != 2) ) {
232 PKCS7err(PKCS7_F_SMIME_READ_PKCS7, PKCS7_R_NO_MULTIPART_BODY_FAILURE);
233 sk_pop_free(parts, (stkfree)BIO_free);
234 return NULL;
235 }
236
237 /* Parse the signature piece */
238 p7in = (BIO *)sk_value(parts, 1);
239
240 if (!(headers = mime_parse_hdr(p7in))) {
241 PKCS7err(PKCS7_F_SMIME_READ_PKCS7,PKCS7_R_MIME_SIG_PARSE_ERROR);
242 sk_pop_free(parts, (stkfree)BIO_free);
243 return NULL;
244 }
245
246 /* Get content type */
247
248 if(!(hdr = mime_hdr_find(headers, "content-type")) ||
249 !hdr->value) {
250 sk_pop_free(headers, mime_hdr_free);
251 PKCS7err(PKCS7_F_SMIME_READ_PKCS7, PKCS7_R_NO_SIG_CONTENT_TYPE);
252 return NULL;
253 }
254
255 if(strcmp(hdr->value, "application/x-pkcs7-signature") &&
256 strcmp(hdr->value, "application/pkcs7-signature")) {
257 sk_pop_free(headers, mime_hdr_free);
258 PKCS7err(PKCS7_F_SMIME_READ_PKCS7,PKCS7_R_SIG_INVALID_MIME_TYPE);
259 ERR_add_error_data(2, "type: ", hdr->value);
260 sk_pop_free(parts, (stkfree)BIO_free);
261 return NULL;
262 }
263 sk_pop_free(headers, mime_hdr_free);
264 /* Read in PKCS#7 */
265 if(!(p7 = B64_read_PKCS7(p7in))) {
266 PKCS7err(PKCS7_F_SMIME_READ_PKCS7,PKCS7_R_PKCS7_SIG_PARSE_ERROR);
267 sk_pop_free(parts, (stkfree)BIO_free);
268 return NULL;
269 }
270
271 if(bcont) {
272 *bcont = (BIO *)sk_value(parts, 0);
273 BIO_free(p7in);
274 sk_free(parts);
275 } else sk_pop_free(parts, (stkfree)BIO_free);
276 return p7;
277 }
278
279 /* OK, if not multipart/signed try opaque signature */
280
281 if (strcmp (hdr->value, "application/x-pkcs7-mime") &&
282 strcmp (hdr->value, "application/pkcs7-mime")) {
283 PKCS7err(PKCS7_F_SMIME_READ_PKCS7,PKCS7_R_INVALID_MIME_TYPE);
284 ERR_add_error_data(2, "type: ", hdr->value);
285 sk_pop_free(headers, mime_hdr_free);
286 return NULL;
287 }
288
289 sk_pop_free(headers, mime_hdr_free);
290
291 if(!(p7 = B64_read_PKCS7(bio))) {
292 PKCS7err(PKCS7_F_SMIME_READ_PKCS7, PKCS7_R_PKCS7_PARSE_ERROR);
293 return NULL;
294 }
295 return p7;
296
297}
298
299/* Copy text from one BIO to another making the output CRLF at EOL */
300int SMIME_crlf_copy(BIO *in, BIO *out, int flags)
301{
302 char eol;
303 int len;
304 char linebuf[MAX_SMLEN];
305 if(flags & PKCS7_BINARY) {
306 while((len = BIO_read(in, linebuf, MAX_SMLEN)) > 0)
307 BIO_write(out, linebuf, len);
308 return 1;
309 }
310 if(flags & PKCS7_TEXT) BIO_printf(out, "Content-Type: text/plain\r\n\r\n");
311 while ((len = BIO_gets(in, linebuf, MAX_SMLEN)) > 0) {
312 eol = 0;
313 while(iscrlf(linebuf[len - 1])) {
314 len--;
315 eol = 1;
316 }
317 BIO_write(out, linebuf, len);
318 if(eol) BIO_write(out, "\r\n", 2);
319 }
320 return 1;
321}
322
323/* Strip off headers if they are text/plain */
324int SMIME_text(BIO *in, BIO *out)
325{
326 char iobuf[4096];
327 int len;
328 STACK *headers;
329 MIME_HEADER *hdr;
330 if (!(headers = mime_parse_hdr(in))) {
331 PKCS7err(PKCS7_F_SMIME_TEXT,PKCS7_R_MIME_PARSE_ERROR);
332 return 0;
333 }
334 if(!(hdr = mime_hdr_find(headers, "content-type")) || !hdr->value) {
335 PKCS7err(PKCS7_F_SMIME_TEXT,PKCS7_R_MIME_NO_CONTENT_TYPE);
336 sk_pop_free(headers, mime_hdr_free);
337 return 0;
338 }
339 if (strcmp (hdr->value, "text/plain")) {
340 PKCS7err(PKCS7_F_SMIME_TEXT,PKCS7_R_INVALID_MIME_TYPE);
341 ERR_add_error_data(2, "type: ", hdr->value);
342 sk_pop_free(headers, mime_hdr_free);
343 return 0;
344 }
345 sk_pop_free(headers, mime_hdr_free);
346 while ((len = BIO_read(in, iobuf, sizeof(iobuf))) > 0)
347 BIO_write(out, iobuf, len);
348 return 1;
349}
350
351/* Split a multipart/XXX message body into component parts: result is
352 * canonical parts in a STACK of bios
353 */
354
355static int multi_split(BIO *bio, char *bound, STACK **ret)
356{
357 char linebuf[MAX_SMLEN];
358 int len, blen;
359 BIO *bpart = NULL;
360 STACK *parts;
361 char state, part, first;
362 blen = strlen(bound);
363 part = 0;
364 state = 0;
365 first = 1;
366 parts = sk_new(NULL);
367 *ret = parts;
368 while ((len = BIO_gets(bio, linebuf, MAX_SMLEN)) > 0) {
369 state = mime_bound_check(linebuf, len, bound, blen);
370 if(state == 1) {
371 first = 1;
372 part++;
373 } else if(state == 2) {
374 sk_push(parts, (char *)bpart);
375 return 1;
376 } else if(part) {
377 if(first) {
378 first = 0;
379 if(bpart) sk_push(parts, (char *)bpart);
380 bpart = BIO_new(BIO_s_mem());
381
382 } else BIO_write(bpart, "\r\n", 2);
383 /* Strip CR+LF from linebuf */
384 while(iscrlf(linebuf[len - 1])) len--;
385 BIO_write(bpart, linebuf, len);
386 }
387 }
388 return 0;
389}
390
391static int iscrlf(char c)
392{
393 if(c == '\r' || c == '\n') return 1;
394 return 0;
395}
396
397/* This is the big one: parse MIME header lines up to message body */
398
399#define MIME_INVALID 0
400#define MIME_START 1
401#define MIME_TYPE 2
402#define MIME_NAME 3
403#define MIME_VALUE 4
404#define MIME_QUOTE 5
405#define MIME_COMMENT 6
406
407
408static STACK *mime_parse_hdr(BIO *bio)
409{
410 char *p, *q, c;
411 char *ntmp;
412 char linebuf[MAX_SMLEN];
413 MIME_HEADER *mhdr = NULL;
414 STACK *headers;
415 int len, state, save_state = 0;
416 headers = sk_new(mime_hdr_cmp);
417 while ((len = BIO_gets(bio, linebuf, MAX_SMLEN)) > 0) {
418 /* If whitespace at line start then continuation line */
419 if(mhdr && isspace((unsigned char)linebuf[0])) state = MIME_NAME;
420 else state = MIME_START;
421 ntmp = NULL;
422 /* Go through all characters */
423 for(p = linebuf, q = linebuf; (c = *p) && (c!='\r') && (c!='\n'); p++) {
424
425 /* State machine to handle MIME headers
426 * if this looks horrible that's because it *is*
427 */
428
429 switch(state) {
430 case MIME_START:
431 if(c == ':') {
432 state = MIME_TYPE;
433 *p = 0;
434 ntmp = strip_ends(q);
435 q = p + 1;
436 }
437 break;
438
439 case MIME_TYPE:
440 if(c == ';') {
441 mime_debug("Found End Value\n");
442 *p = 0;
443 mhdr = mime_hdr_new(ntmp, strip_ends(q));
444 sk_push(headers, (char *)mhdr);
445 ntmp = NULL;
446 q = p + 1;
447 state = MIME_NAME;
448 } else if(c == '(') {
449 save_state = state;
450 state = MIME_COMMENT;
451 }
452 break;
453
454 case MIME_COMMENT:
455 if(c == ')') {
456 state = save_state;
457 }
458 break;
459
460 case MIME_NAME:
461 if(c == '=') {
462 state = MIME_VALUE;
463 *p = 0;
464 ntmp = strip_ends(q);
465 q = p + 1;
466 }
467 break ;
468
469 case MIME_VALUE:
470 if(c == ';') {
471 state = MIME_NAME;
472 *p = 0;
473 mime_hdr_addparam(mhdr, ntmp, strip_ends(q));
474 ntmp = NULL;
475 q = p + 1;
476 } else if (c == '"') {
477 mime_debug("Found Quote\n");
478 state = MIME_QUOTE;
479 } else if(c == '(') {
480 save_state = state;
481 state = MIME_COMMENT;
482 }
483 break;
484
485 case MIME_QUOTE:
486 if(c == '"') {
487 mime_debug("Found Match Quote\n");
488 state = MIME_VALUE;
489 }
490 break;
491 }
492 }
493
494 if(state == MIME_TYPE) {
495 mhdr = mime_hdr_new(ntmp, strip_ends(q));
496 sk_push(headers, (char *)mhdr);
497 } else if(state == MIME_VALUE)
498 mime_hdr_addparam(mhdr, ntmp, strip_ends(q));
499 if(p == linebuf) break; /* Blank line means end of headers */
500}
501
502return headers;
503
504}
505
506static char *strip_ends(char *name)
507{
508 return strip_end(strip_start(name));
509}
510
511/* Strip a parameter of whitespace from start of param */
512static char *strip_start(char *name)
513{
514 char *p, c;
515 /* Look for first non white space or quote */
516 for(p = name; (c = *p) ;p++) {
517 if(c == '"') {
518 /* Next char is start of string if non null */
519 if(p[1]) return p + 1;
520 /* Else null string */
521 return NULL;
522 }
523 if(!isspace((unsigned char)c)) return p;
524 }
525 return NULL;
526}
527
528/* As above but strip from end of string : maybe should handle brackets? */
529static char *strip_end(char *name)
530{
531 char *p, c;
532 if(!name) return NULL;
533 /* Look for first non white space or quote */
534 for(p = name + strlen(name) - 1; p >= name ;p--) {
535 c = *p;
536 if(c == '"') {
537 if(p - 1 == name) return NULL;
538 *p = 0;
539 return name;
540 }
541 if(isspace((unsigned char)c)) *p = 0;
542 else return name;
543 }
544 return NULL;
545}
546
547static MIME_HEADER *mime_hdr_new(char *name, char *value)
548{
549 MIME_HEADER *mhdr;
550 char *tmpname, *tmpval, *p;
551 int c;
552 if(name) {
553 if(!(tmpname = BUF_strdup(name))) return NULL;
554 for(p = tmpname ; *p; p++) {
555 c = *p;
556 if(isupper(c)) {
557 c = tolower(c);
558 *p = c;
559 }
560 }
561 } else tmpname = NULL;
562 if(value) {
563 if(!(tmpval = BUF_strdup(value))) return NULL;
564 for(p = tmpval ; *p; p++) {
565 c = *p;
566 if(isupper(c)) {
567 c = tolower(c);
568 *p = c;
569 }
570 }
571 } else tmpval = NULL;
572 mhdr = (MIME_HEADER *) Malloc(sizeof(MIME_HEADER));
573 if(!mhdr) return NULL;
574 mhdr->name = tmpname;
575 mhdr->value = tmpval;
576 if(!(mhdr->params = sk_new(mime_param_cmp))) return NULL;
577 return mhdr;
578}
579
580static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value)
581{
582 char *tmpname, *tmpval, *p;
583 int c;
584 MIME_PARAM *mparam;
585 if(name) {
586 tmpname = BUF_strdup(name);
587 if(!tmpname) return 0;
588 for(p = tmpname ; *p; p++) {
589 c = *p;
590 if(isupper(c)) {
591 c = tolower(c);
592 *p = c;
593 }
594 }
595 } else tmpname = NULL;
596 if(value) {
597 tmpval = BUF_strdup(value);
598 if(!tmpval) return 0;
599 } else tmpval = NULL;
600 /* Parameter values are case sensitive so leave as is */
601 mparam = (MIME_PARAM *) Malloc(sizeof(MIME_PARAM));
602 if(!mparam) return 0;
603 mparam->param_name = tmpname;
604 mparam->param_value = tmpval;
605 sk_push(mhdr->params, (char *)mparam);
606 return 1;
607}
608
609static int mime_hdr_cmp(MIME_HEADER **a, MIME_HEADER **b)
610{
611 return(strcmp((*a)->name, (*b)->name));
612}
613
614static int mime_param_cmp(MIME_PARAM **a, MIME_PARAM **b)
615{
616 return(strcmp((*a)->param_name, (*b)->param_name));
617}
618
619/* Find a header with a given name (if possible) */
620
621static MIME_HEADER *mime_hdr_find(STACK *hdrs, char *name)
622{
623 MIME_HEADER htmp;
624 int idx;
625 htmp.name = name;
626 idx = sk_find(hdrs, (char *)&htmp);
627 if(idx < 0) return NULL;
628 return (MIME_HEADER *)sk_value(hdrs, idx);
629}
630
631static MIME_PARAM *mime_param_find(MIME_HEADER *hdr, char *name)
632{
633 MIME_PARAM param;
634 int idx;
635 param.param_name = name;
636 idx = sk_find(hdr->params, (char *)&param);
637 if(idx < 0) return NULL;
638 return (MIME_PARAM *)sk_value(hdr->params, idx);
639}
640
641static void mime_hdr_free(MIME_HEADER *hdr)
642{
643 if(hdr->name) Free(hdr->name);
644 if(hdr->value) Free(hdr->value);
645 if(hdr->params) sk_pop_free(hdr->params, mime_param_free);
646 Free(hdr);
647}
648
649static void mime_param_free(MIME_PARAM *param)
650{
651 if(param->param_name) Free(param->param_name);
652 if(param->param_value) Free(param->param_value);
653 Free(param);
654}
655
656/* Check for a multipart boundary. Returns:
657 * 0 : no boundary
658 * 1 : part boundary
659 * 2 : final boundary
660 */
661static int mime_bound_check(char *line, int linelen, char *bound, int blen)
662{
663 if(linelen == -1) linelen = strlen(line);
664 if(blen == -1) blen = strlen(bound);
665 /* Quickly eliminate if line length too short */
666 if(blen + 2 > linelen) return 0;
667 /* Check for part boundary */
668 if(!strncmp(line, "--", 2) && !strncmp(line + 2, bound, blen)) {
669 if(!strncmp(line + blen + 2, "--", 2)) return 2;
670 else return 1;
671 }
672 return 0;
673}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-12-28 07:05:59 +0000