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Import OpenSSL-0.9.8i.
[dragonfly.git] / crypto / openssl-0.9.7d / crypto / pkcs7 / pk7_mime.c
blob5d2a97839d2b6155449caf3e77e1d2ea433d699c
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) 1999-2003 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
72 typedef struct {
73 char *param_name; /* Param name e.g. "micalg" */
74 char *param_value; /* Param value e.g. "sha1" */
75 } MIME_PARAM;
76
77 DECLARE_STACK_OF(MIME_PARAM)
78 IMPLEMENT_STACK_OF(MIME_PARAM)
79
80 typedef struct {
81 char *name; /* Name of line e.g. "content-type" */
82 char *value; /* Value of line e.g. "text/plain" */
83 STACK_OF(MIME_PARAM) *params; /* Zero or more parameters */
84 } MIME_HEADER;
85
86 DECLARE_STACK_OF(MIME_HEADER)
87 IMPLEMENT_STACK_OF(MIME_HEADER)
88
89 static int B64_write_PKCS7(BIO *bio, PKCS7 *p7);
90 static PKCS7 *B64_read_PKCS7(BIO *bio);
91 static char * strip_ends(char *name);
92 static char * strip_start(char *name);
93 static char * strip_end(char *name);
94 static MIME_HEADER *mime_hdr_new(char *name, char *value);
95 static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value);
96 static STACK_OF(MIME_HEADER) *mime_parse_hdr(BIO *bio);
97 static int mime_hdr_cmp(const MIME_HEADER * const *a,
98 const MIME_HEADER * const *b);
99 static int mime_param_cmp(const MIME_PARAM * const *a,
100 const MIME_PARAM * const *b);
101 static void mime_param_free(MIME_PARAM *param);
102 static int mime_bound_check(char *line, int linelen, char *bound, int blen);
103 static int multi_split(BIO *bio, char *bound, STACK_OF(BIO) **ret);
104 static int strip_eol(char *linebuf, int *plen);
105 static MIME_HEADER *mime_hdr_find(STACK_OF(MIME_HEADER) *hdrs, char *name);
106 static MIME_PARAM *mime_param_find(MIME_HEADER *hdr, char *name);
107 static void mime_hdr_free(MIME_HEADER *hdr);
108
109 #define MAX_SMLEN 1024
110 #define mime_debug(x) /* x */
111
112
113 typedef void (*stkfree)();
114
115 /* Base 64 read and write of PKCS#7 structure */
116
117 static int B64_write_PKCS7(BIO *bio, PKCS7 *p7)
118 {
119 BIO *b64;
120 if(!(b64 = BIO_new(BIO_f_base64()))) {
121 PKCS7err(PKCS7_F_B64_WRITE_PKCS7,ERR_R_MALLOC_FAILURE);
122 return 0;
123 }
124 bio = BIO_push(b64, bio);
125 i2d_PKCS7_bio(bio, p7);
126 BIO_flush(bio);
127 bio = BIO_pop(bio);
128 BIO_free(b64);
129 return 1;
130 }
131
132 static PKCS7 *B64_read_PKCS7(BIO *bio)
133 {
134 BIO *b64;
135 PKCS7 *p7;
136 if(!(b64 = BIO_new(BIO_f_base64()))) {
137 PKCS7err(PKCS7_F_B64_READ_PKCS7,ERR_R_MALLOC_FAILURE);
138 return 0;
139 }
140 bio = BIO_push(b64, bio);
141 if(!(p7 = d2i_PKCS7_bio(bio, NULL)))
142 PKCS7err(PKCS7_F_B64_READ_PKCS7,PKCS7_R_DECODE_ERROR);
143 BIO_flush(bio);
144 bio = BIO_pop(bio);
145 BIO_free(b64);
146 return p7;
147 }
148
149 /* SMIME sender */
150
151 int SMIME_write_PKCS7(BIO *bio, PKCS7 *p7, BIO *data, int flags)
152 {
153 char bound[33], c;
154 int i;
155 char *mime_prefix, *mime_eol;
156 if (flags & PKCS7_NOOLDMIMETYPE)
157 mime_prefix = "application/pkcs7-";
158 else
159 mime_prefix = "application/x-pkcs7-";
160 if (flags & PKCS7_CRLFEOL)
161 mime_eol = "\r\n";
162 else
163 mime_eol = "\n";
164 if((flags & PKCS7_DETACHED) && data) {
165 /* We want multipart/signed */
166 /* Generate a random boundary */
167 RAND_pseudo_bytes((unsigned char *)bound, 32);
168 for(i = 0; i < 32; i++) {
169 c = bound[i] & 0xf;
170 if(c < 10) c += '0';
171 else c += 'A' - 10;
172 bound[i] = c;
173 }
174 bound[32] = 0;
175 BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol);
176 BIO_printf(bio, "Content-Type: multipart/signed;");
177 BIO_printf(bio, " protocol=\"%ssignature\";", mime_prefix);
178 BIO_printf(bio, " micalg=sha1; boundary=\"----%s\"%s%s",
179 bound, mime_eol, mime_eol);
180 BIO_printf(bio, "This is an S/MIME signed message%s%s",
181 mime_eol, mime_eol);
182 /* Now write out the first part */
183 BIO_printf(bio, "------%s%s", bound, mime_eol);
184 SMIME_crlf_copy(data, bio, flags);
185 BIO_printf(bio, "%s------%s%s", mime_eol, bound, mime_eol);
186
187 /* Headers for signature */
188
189 BIO_printf(bio, "Content-Type: %ssignature;", mime_prefix);
190 BIO_printf(bio, " name=\"smime.p7s\"%s", mime_eol);
191 BIO_printf(bio, "Content-Transfer-Encoding: base64%s",
192 mime_eol);
193 BIO_printf(bio, "Content-Disposition: attachment;");
194 BIO_printf(bio, " filename=\"smime.p7s\"%s%s",
195 mime_eol, mime_eol);
196 B64_write_PKCS7(bio, p7);
197 BIO_printf(bio,"%s------%s--%s%s", mime_eol, bound,
198 mime_eol, mime_eol);
199 return 1;
200 }
201 /* MIME headers */
202 BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol);
203 BIO_printf(bio, "Content-Disposition: attachment;");
204 BIO_printf(bio, " filename=\"smime.p7m\"%s", mime_eol);
205 BIO_printf(bio, "Content-Type: %smime;", mime_prefix);
206 BIO_printf(bio, " name=\"smime.p7m\"%s", mime_eol);
207 BIO_printf(bio, "Content-Transfer-Encoding: base64%s%s",
208 mime_eol, mime_eol);
209 B64_write_PKCS7(bio, p7);
210 BIO_printf(bio, "%s", mime_eol);
211 return 1;
212 }
213
214 /* SMIME reader: handle multipart/signed and opaque signing.
215 * in multipart case the content is placed in a memory BIO
216 * pointed to by "bcont". In opaque this is set to NULL
217 */
218
219 PKCS7 *SMIME_read_PKCS7(BIO *bio, BIO **bcont)
220 {
221 BIO *p7in;
222 STACK_OF(MIME_HEADER) *headers = NULL;
223 STACK_OF(BIO) *parts = NULL;
224 MIME_HEADER *hdr;
225 MIME_PARAM *prm;
226 PKCS7 *p7;
227 int ret;
228
229 if(bcont) *bcont = NULL;
230
231 if (!(headers = mime_parse_hdr(bio))) {
232 PKCS7err(PKCS7_F_SMIME_READ_PKCS7,PKCS7_R_MIME_PARSE_ERROR);
233 return NULL;
234 }
235
236 if(!(hdr = mime_hdr_find(headers, "content-type")) || !hdr->value) {
237 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
238 PKCS7err(PKCS7_F_SMIME_READ_PKCS7, PKCS7_R_NO_CONTENT_TYPE);
239 return NULL;
240 }
241
242 /* Handle multipart/signed */
243
244 if(!strcmp(hdr->value, "multipart/signed")) {
245 /* Split into two parts */
246 prm = mime_param_find(hdr, "boundary");
247 if(!prm || !prm->param_value) {
248 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
249 PKCS7err(PKCS7_F_SMIME_READ_PKCS7, PKCS7_R_NO_MULTIPART_BOUNDARY);
250 return NULL;
251 }
252 ret = multi_split(bio, prm->param_value, &parts);
253 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
254 if(!ret || (sk_BIO_num(parts) != 2) ) {
255 PKCS7err(PKCS7_F_SMIME_READ_PKCS7, PKCS7_R_NO_MULTIPART_BODY_FAILURE);
256 sk_BIO_pop_free(parts, BIO_vfree);
257 return NULL;
258 }
259
260 /* Parse the signature piece */
261 p7in = sk_BIO_value(parts, 1);
262
263 if (!(headers = mime_parse_hdr(p7in))) {
264 PKCS7err(PKCS7_F_SMIME_READ_PKCS7,PKCS7_R_MIME_SIG_PARSE_ERROR);
265 sk_BIO_pop_free(parts, BIO_vfree);
266 return NULL;
267 }
268
269 /* Get content type */
270
271 if(!(hdr = mime_hdr_find(headers, "content-type")) ||
272 !hdr->value) {
273 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
274 PKCS7err(PKCS7_F_SMIME_READ_PKCS7, PKCS7_R_NO_SIG_CONTENT_TYPE);
275 return NULL;
276 }
277
278 if(strcmp(hdr->value, "application/x-pkcs7-signature") &&
279 strcmp(hdr->value, "application/pkcs7-signature")) {
280 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
281 PKCS7err(PKCS7_F_SMIME_READ_PKCS7,PKCS7_R_SIG_INVALID_MIME_TYPE);
282 ERR_add_error_data(2, "type: ", hdr->value);
283 sk_BIO_pop_free(parts, BIO_vfree);
284 return NULL;
285 }
286 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
287 /* Read in PKCS#7 */
288 if(!(p7 = B64_read_PKCS7(p7in))) {
289 PKCS7err(PKCS7_F_SMIME_READ_PKCS7,PKCS7_R_PKCS7_SIG_PARSE_ERROR);
290 sk_BIO_pop_free(parts, BIO_vfree);
291 return NULL;
292 }
293
294 if(bcont) {
295 *bcont = sk_BIO_value(parts, 0);
296 BIO_free(p7in);
297 sk_BIO_free(parts);
298 } else sk_BIO_pop_free(parts, BIO_vfree);
299 return p7;
300 }
301
302 /* OK, if not multipart/signed try opaque signature */
303
304 if (strcmp (hdr->value, "application/x-pkcs7-mime") &&
305 strcmp (hdr->value, "application/pkcs7-mime")) {
306 PKCS7err(PKCS7_F_SMIME_READ_PKCS7,PKCS7_R_INVALID_MIME_TYPE);
307 ERR_add_error_data(2, "type: ", hdr->value);
308 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
309 return NULL;
310 }
311
312 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
313
314 if(!(p7 = B64_read_PKCS7(bio))) {
315 PKCS7err(PKCS7_F_SMIME_READ_PKCS7, PKCS7_R_PKCS7_PARSE_ERROR);
316 return NULL;
317 }
318 return p7;
319
320 }
321
322 /* Copy text from one BIO to another making the output CRLF at EOL */
323 int SMIME_crlf_copy(BIO *in, BIO *out, int flags)
324 {
325 char eol;
326 int len;
327 char linebuf[MAX_SMLEN];
328 if(flags & PKCS7_BINARY) {
329 while((len = BIO_read(in, linebuf, MAX_SMLEN)) > 0)
330 BIO_write(out, linebuf, len);
331 return 1;
332 }
333 if(flags & PKCS7_TEXT) BIO_printf(out, "Content-Type: text/plain\r\n\r\n");
334 while ((len = BIO_gets(in, linebuf, MAX_SMLEN)) > 0) {
335 eol = strip_eol(linebuf, &len);
336 if (len)
337 BIO_write(out, linebuf, len);
338 if(eol) BIO_write(out, "\r\n", 2);
339 }
340 return 1;
341 }
342
343 /* Strip off headers if they are text/plain */
344 int SMIME_text(BIO *in, BIO *out)
345 {
346 char iobuf[4096];
347 int len;
348 STACK_OF(MIME_HEADER) *headers;
349 MIME_HEADER *hdr;
350
351 if (!(headers = mime_parse_hdr(in))) {
352 PKCS7err(PKCS7_F_SMIME_TEXT,PKCS7_R_MIME_PARSE_ERROR);
353 return 0;
354 }
355 if(!(hdr = mime_hdr_find(headers, "content-type")) || !hdr->value) {
356 PKCS7err(PKCS7_F_SMIME_TEXT,PKCS7_R_MIME_NO_CONTENT_TYPE);
357 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
358 return 0;
359 }
360 if (strcmp (hdr->value, "text/plain")) {
361 PKCS7err(PKCS7_F_SMIME_TEXT,PKCS7_R_INVALID_MIME_TYPE);
362 ERR_add_error_data(2, "type: ", hdr->value);
363 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
364 return 0;
365 }
366 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
367 while ((len = BIO_read(in, iobuf, sizeof(iobuf))) > 0)
368 BIO_write(out, iobuf, len);
369 return 1;
370 }
371
372 /* Split a multipart/XXX message body into component parts: result is
373 * canonical parts in a STACK of bios
374 */
375
376 static int multi_split(BIO *bio, char *bound, STACK_OF(BIO) **ret)
377 {
378 char linebuf[MAX_SMLEN];
379 int len, blen;
380 int eol = 0, next_eol = 0;
381 BIO *bpart = NULL;
382 STACK_OF(BIO) *parts;
383 char state, part, first;
384
385 blen = strlen(bound);
386 part = 0;
387 state = 0;
388 first = 1;
389 parts = sk_BIO_new_null();
390 *ret = parts;
391 while ((len = BIO_gets(bio, linebuf, MAX_SMLEN)) > 0) {
392 state = mime_bound_check(linebuf, len, bound, blen);
393 if(state == 1) {
394 first = 1;
395 part++;
396 } else if(state == 2) {
397 sk_BIO_push(parts, bpart);
398 return 1;
399 } else if(part) {
400 /* Strip CR+LF from linebuf */
401 next_eol = strip_eol(linebuf, &len);
402 if(first) {
403 first = 0;
404 if(bpart) sk_BIO_push(parts, bpart);
405 bpart = BIO_new(BIO_s_mem());
406 BIO_set_mem_eof_return(bpart, 0);
407 } else if (eol)
408 BIO_write(bpart, "\r\n", 2);
409 eol = next_eol;
410 if (len)
411 BIO_write(bpart, linebuf, len);
412 }
413 }
414 return 0;
415 }
416
417 /* This is the big one: parse MIME header lines up to message body */
418
419 #define MIME_INVALID 0
420 #define MIME_START 1
421 #define MIME_TYPE 2
422 #define MIME_NAME 3
423 #define MIME_VALUE 4
424 #define MIME_QUOTE 5
425 #define MIME_COMMENT 6
426
427
428 static STACK_OF(MIME_HEADER) *mime_parse_hdr(BIO *bio)
429 {
430 char *p, *q, c;
431 char *ntmp;
432 char linebuf[MAX_SMLEN];
433 MIME_HEADER *mhdr = NULL;
434 STACK_OF(MIME_HEADER) *headers;
435 int len, state, save_state = 0;
436
437 headers = sk_MIME_HEADER_new(mime_hdr_cmp);
438 while ((len = BIO_gets(bio, linebuf, MAX_SMLEN)) > 0) {
439 /* If whitespace at line start then continuation line */
440 if(mhdr && isspace((unsigned char)linebuf[0])) state = MIME_NAME;
441 else state = MIME_START;
442 ntmp = NULL;
443 /* Go through all characters */
444 for(p = linebuf, q = linebuf; (c = *p) && (c!='\r') && (c!='\n'); p++) {
445
446 /* State machine to handle MIME headers
447 * if this looks horrible that's because it *is*
448 */
449
450 switch(state) {
451 case MIME_START:
452 if(c == ':') {
453 state = MIME_TYPE;
454 *p = 0;
455 ntmp = strip_ends(q);
456 q = p + 1;
457 }
458 break;
459
460 case MIME_TYPE:
461 if(c == ';') {
462 mime_debug("Found End Value\n");
463 *p = 0;
464 mhdr = mime_hdr_new(ntmp, strip_ends(q));
465 sk_MIME_HEADER_push(headers, mhdr);
466 ntmp = NULL;
467 q = p + 1;
468 state = MIME_NAME;
469 } else if(c == '(') {
470 save_state = state;
471 state = MIME_COMMENT;
472 }
473 break;
474
475 case MIME_COMMENT:
476 if(c == ')') {
477 state = save_state;
478 }
479 break;
480
481 case MIME_NAME:
482 if(c == '=') {
483 state = MIME_VALUE;
484 *p = 0;
485 ntmp = strip_ends(q);
486 q = p + 1;
487 }
488 break ;
489
490 case MIME_VALUE:
491 if(c == ';') {
492 state = MIME_NAME;
493 *p = 0;
494 mime_hdr_addparam(mhdr, ntmp, strip_ends(q));
495 ntmp = NULL;
496 q = p + 1;
497 } else if (c == '"') {
498 mime_debug("Found Quote\n");
499 state = MIME_QUOTE;
500 } else if(c == '(') {
501 save_state = state;
502 state = MIME_COMMENT;
503 }
504 break;
505
506 case MIME_QUOTE:
507 if(c == '"') {
508 mime_debug("Found Match Quote\n");
509 state = MIME_VALUE;
510 }
511 break;
512 }
513 }
514
515 if(state == MIME_TYPE) {
516 mhdr = mime_hdr_new(ntmp, strip_ends(q));
517 sk_MIME_HEADER_push(headers, mhdr);
518 } else if(state == MIME_VALUE)
519 mime_hdr_addparam(mhdr, ntmp, strip_ends(q));
520 if(p == linebuf) break; /* Blank line means end of headers */
521 }
522
523 return headers;
524
525 }
526
527 static char *strip_ends(char *name)
528 {
529 return strip_end(strip_start(name));
530 }
531
532 /* Strip a parameter of whitespace from start of param */
533 static char *strip_start(char *name)
534 {
535 char *p, c;
536 /* Look for first non white space or quote */
537 for(p = name; (c = *p) ;p++) {
538 if(c == '"') {
539 /* Next char is start of string if non null */
540 if(p[1]) return p + 1;
541 /* Else null string */
542 return NULL;
543 }
544 if(!isspace((unsigned char)c)) return p;
545 }
546 return NULL;
547 }
548
549 /* As above but strip from end of string : maybe should handle brackets? */
550 static char *strip_end(char *name)
551 {
552 char *p, c;
553 if(!name) return NULL;
554 /* Look for first non white space or quote */
555 for(p = name + strlen(name) - 1; p >= name ;p--) {
556 c = *p;
557 if(c == '"') {
558 if(p - 1 == name) return NULL;
559 *p = 0;
560 return name;
561 }
562 if(isspace((unsigned char)c)) *p = 0;
563 else return name;
564 }
565 return NULL;
566 }
567
568 static MIME_HEADER *mime_hdr_new(char *name, char *value)
569 {
570 MIME_HEADER *mhdr;
571 char *tmpname, *tmpval, *p;
572 int c;
573 if(name) {
574 if(!(tmpname = BUF_strdup(name))) return NULL;
575 for(p = tmpname ; *p; p++) {
576 c = *p;
577 if(isupper(c)) {
578 c = tolower(c);
579 *p = c;
580 }
581 }
582 } else tmpname = NULL;
583 if(value) {
584 if(!(tmpval = BUF_strdup(value))) return NULL;
585 for(p = tmpval ; *p; p++) {
586 c = *p;
587 if(isupper(c)) {
588 c = tolower(c);
589 *p = c;
590 }
591 }
592 } else tmpval = NULL;
593 mhdr = (MIME_HEADER *) OPENSSL_malloc(sizeof(MIME_HEADER));
594 if(!mhdr) return NULL;
595 mhdr->name = tmpname;
596 mhdr->value = tmpval;
597 if(!(mhdr->params = sk_MIME_PARAM_new(mime_param_cmp))) return NULL;
598 return mhdr;
599 }
600
601 static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value)
602 {
603 char *tmpname, *tmpval, *p;
604 int c;
605 MIME_PARAM *mparam;
606 if(name) {
607 tmpname = BUF_strdup(name);
608 if(!tmpname) return 0;
609 for(p = tmpname ; *p; p++) {
610 c = *p;
611 if(isupper(c)) {
612 c = tolower(c);
613 *p = c;
614 }
615 }
616 } else tmpname = NULL;
617 if(value) {
618 tmpval = BUF_strdup(value);
619 if(!tmpval) return 0;
620 } else tmpval = NULL;
621 /* Parameter values are case sensitive so leave as is */
622 mparam = (MIME_PARAM *) OPENSSL_malloc(sizeof(MIME_PARAM));
623 if(!mparam) return 0;
624 mparam->param_name = tmpname;
625 mparam->param_value = tmpval;
626 sk_MIME_PARAM_push(mhdr->params, mparam);
627 return 1;
628 }
629
630 static int mime_hdr_cmp(const MIME_HEADER * const *a,
631 const MIME_HEADER * const *b)
632 {
633 return(strcmp((*a)->name, (*b)->name));
634 }
635
636 static int mime_param_cmp(const MIME_PARAM * const *a,
637 const MIME_PARAM * const *b)
638 {
639 return(strcmp((*a)->param_name, (*b)->param_name));
640 }
641
642 /* Find a header with a given name (if possible) */
643
644 static MIME_HEADER *mime_hdr_find(STACK_OF(MIME_HEADER) *hdrs, char *name)
645 {
646 MIME_HEADER htmp;
647 int idx;
648 htmp.name = name;
649 idx = sk_MIME_HEADER_find(hdrs, &htmp);
650 if(idx < 0) return NULL;
651 return sk_MIME_HEADER_value(hdrs, idx);
652 }
653
654 static MIME_PARAM *mime_param_find(MIME_HEADER *hdr, char *name)
655 {
656 MIME_PARAM param;
657 int idx;
658 param.param_name = name;
659 idx = sk_MIME_PARAM_find(hdr->params, &param);
660 if(idx < 0) return NULL;
661 return sk_MIME_PARAM_value(hdr->params, idx);
662 }
663
664 static void mime_hdr_free(MIME_HEADER *hdr)
665 {
666 if(hdr->name) OPENSSL_free(hdr->name);
667 if(hdr->value) OPENSSL_free(hdr->value);
668 if(hdr->params) sk_MIME_PARAM_pop_free(hdr->params, mime_param_free);
669 OPENSSL_free(hdr);
670 }
671
672 static void mime_param_free(MIME_PARAM *param)
673 {
674 if(param->param_name) OPENSSL_free(param->param_name);
675 if(param->param_value) OPENSSL_free(param->param_value);
676 OPENSSL_free(param);
677 }
678
679 /* Check for a multipart boundary. Returns:
680 * 0 : no boundary
681 * 1 : part boundary
682 * 2 : final boundary
683 */
684 static int mime_bound_check(char *line, int linelen, char *bound, int blen)
685 {
686 if(linelen == -1) linelen = strlen(line);
687 if(blen == -1) blen = strlen(bound);
688 /* Quickly eliminate if line length too short */
689 if(blen + 2 > linelen) return 0;
690 /* Check for part boundary */
691 if(!strncmp(line, "--", 2) && !strncmp(line + 2, bound, blen)) {
692 if(!strncmp(line + blen + 2, "--", 2)) return 2;
693 else return 1;
694 }
695 return 0;
696 }
697
698 static int strip_eol(char *linebuf, int *plen)
699 {
700 int len = *plen;
701 char *p, c;
702 int is_eol = 0;
703 p = linebuf + len - 1;
704 for (p = linebuf + len - 1; len > 0; len--, p--)
705 {
706 c = *p;
707 if (c == '\n')
708 is_eol = 1;
709 else if (c != '\r')
710 break;
711 }
712 *plen = len;
713 return is_eol;
714 }
DragonFly BSD