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diff --git a/src/lib/libcrypto/asn1/asn_mime.c b/src/lib/libcrypto/asn1/asn_mime.c
deleted file mode 100644
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1/* asn_mime.c */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project.
4 */
5/* ====================================================================
6 * Copyright (c) 1999-2008 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 */
54
55#include <stdio.h>
56#include <ctype.h>
57#include "cryptlib.h"
58#include <openssl/rand.h>
59#include <openssl/x509.h>
60#include <openssl/asn1.h>
61#include <openssl/asn1t.h>
62
63/* Generalised MIME like utilities for streaming ASN1. Although many
64 * have a PKCS7/CMS like flavour others are more general purpose.
65 */
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 *param_name; /* Param name e.g. "micalg" */
74char *param_value; /* Param value e.g. "sha1" */
75} MIME_PARAM;
76
77DECLARE_STACK_OF(MIME_PARAM)
78IMPLEMENT_STACK_OF(MIME_PARAM)
79
80typedef struct {
81char *name; /* Name of line e.g. "content-type" */
82char *value; /* Value of line e.g. "text/plain" */
83STACK_OF(MIME_PARAM) *params; /* Zero or more parameters */
84} MIME_HEADER;
85
86DECLARE_STACK_OF(MIME_HEADER)
87IMPLEMENT_STACK_OF(MIME_HEADER)
88
89static char * strip_ends(char *name);
90static char * strip_start(char *name);
91static char * strip_end(char *name);
92static MIME_HEADER *mime_hdr_new(char *name, char *value);
93static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value);
94static STACK_OF(MIME_HEADER) *mime_parse_hdr(BIO *bio);
95static int mime_hdr_cmp(const MIME_HEADER * const *a,
96 const MIME_HEADER * const *b);
97static int mime_param_cmp(const MIME_PARAM * const *a,
98 const MIME_PARAM * const *b);
99static void mime_param_free(MIME_PARAM *param);
100static int mime_bound_check(char *line, int linelen, char *bound, int blen);
101static int multi_split(BIO *bio, char *bound, STACK_OF(BIO) **ret);
102static int strip_eol(char *linebuf, int *plen);
103static MIME_HEADER *mime_hdr_find(STACK_OF(MIME_HEADER) *hdrs, char *name);
104static MIME_PARAM *mime_param_find(MIME_HEADER *hdr, char *name);
105static void mime_hdr_free(MIME_HEADER *hdr);
106
107#define MAX_SMLEN 1024
108#define mime_debug(x) /* x */
109
110/* Base 64 read and write of ASN1 structure */
111
112static int B64_write_ASN1(BIO *out, ASN1_VALUE *val, BIO *in, int flags,
113 const ASN1_ITEM *it)
114 {
115 BIO *b64;
116 int r;
117 b64 = BIO_new(BIO_f_base64());
118 if(!b64)
119 {
120 ASN1err(ASN1_F_B64_WRITE_ASN1,ERR_R_MALLOC_FAILURE);
121 return 0;
122 }
123 /* prepend the b64 BIO so all data is base64 encoded.
124 */
125 out = BIO_push(b64, out);
126 r = ASN1_item_i2d_bio(it, out, val);
127 (void)BIO_flush(out);
128 BIO_pop(out);
129 BIO_free(b64);
130 return r;
131 }
132
133static ASN1_VALUE *b64_read_asn1(BIO *bio, const ASN1_ITEM *it)
134{
135 BIO *b64;
136 ASN1_VALUE *val;
137 if(!(b64 = BIO_new(BIO_f_base64()))) {
138 ASN1err(ASN1_F_B64_READ_ASN1,ERR_R_MALLOC_FAILURE);
139 return 0;
140 }
141 bio = BIO_push(b64, bio);
142 val = ASN1_item_d2i_bio(it, bio, NULL);
143 if(!val)
144 ASN1err(ASN1_F_B64_READ_ASN1,ASN1_R_DECODE_ERROR);
145 (void)BIO_flush(bio);
146 bio = BIO_pop(bio);
147 BIO_free(b64);
148 return val;
149}
150
151/* Generate the MIME "micalg" parameter from RFC3851, RFC4490 */
152
153static int asn1_write_micalg(BIO *out, STACK_OF(X509_ALGOR) *mdalgs)
154 {
155 int i, have_unknown = 0, write_comma, md_nid;
156 have_unknown = 0;
157 write_comma = 0;
158 for (i = 0; i < sk_X509_ALGOR_num(mdalgs); i++)
159 {
160 if (write_comma)
161 BIO_write(out, ",", 1);
162 write_comma = 1;
163 md_nid = OBJ_obj2nid(sk_X509_ALGOR_value(mdalgs, i)->algorithm);
164 switch(md_nid)
165 {
166 case NID_sha1:
167 BIO_puts(out, "sha1");
168 break;
169
170 case NID_md5:
171 BIO_puts(out, "md5");
172 break;
173
174 case NID_sha256:
175 BIO_puts(out, "sha-256");
176 break;
177
178 case NID_sha384:
179 BIO_puts(out, "sha-384");
180 break;
181
182 case NID_sha512:
183 BIO_puts(out, "sha-512");
184 break;
185
186 default:
187 if (have_unknown)
188 write_comma = 0;
189 else
190 {
191 BIO_puts(out, "unknown");
192 have_unknown = 1;
193 }
194 break;
195
196 }
197 }
198
199 return 1;
200
201 }
202
203/* SMIME sender */
204
205int int_smime_write_ASN1(BIO *bio, ASN1_VALUE *val, BIO *data, int flags,
206 int ctype_nid, int econt_nid,
207 STACK_OF(X509_ALGOR) *mdalgs,
208 asn1_output_data_fn *data_fn,
209 const ASN1_ITEM *it)
210{
211 char bound[33], c;
212 int i;
213 const char *mime_prefix, *mime_eol, *cname = "smime.p7m";
214 const char *msg_type=NULL;
215 if (flags & SMIME_OLDMIME)
216 mime_prefix = "application/x-pkcs7-";
217 else
218 mime_prefix = "application/pkcs7-";
219
220 if (flags & SMIME_CRLFEOL)
221 mime_eol = "\r\n";
222 else
223 mime_eol = "\n";
224 if((flags & SMIME_DETACHED) && data) {
225 /* We want multipart/signed */
226 /* Generate a random boundary */
227 RAND_pseudo_bytes((unsigned char *)bound, 32);
228 for(i = 0; i < 32; i++) {
229 c = bound[i] & 0xf;
230 if(c < 10) c += '0';
231 else c += 'A' - 10;
232 bound[i] = c;
233 }
234 bound[32] = 0;
235 BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol);
236 BIO_printf(bio, "Content-Type: multipart/signed;");
237 BIO_printf(bio, " protocol=\"%ssignature\";", mime_prefix);
238 BIO_puts(bio, " micalg=\"");
239 asn1_write_micalg(bio, mdalgs);
240 BIO_printf(bio, "\"; boundary=\"----%s\"%s%s",
241 bound, mime_eol, mime_eol);
242 BIO_printf(bio, "This is an S/MIME signed message%s%s",
243 mime_eol, mime_eol);
244 /* Now write out the first part */
245 BIO_printf(bio, "------%s%s", bound, mime_eol);
246 if (!data_fn(bio, data, val, flags, it))
247 return 0;
248 BIO_printf(bio, "%s------%s%s", mime_eol, bound, mime_eol);
249
250 /* Headers for signature */
251
252 BIO_printf(bio, "Content-Type: %ssignature;", mime_prefix);
253 BIO_printf(bio, " name=\"smime.p7s\"%s", mime_eol);
254 BIO_printf(bio, "Content-Transfer-Encoding: base64%s",
255 mime_eol);
256 BIO_printf(bio, "Content-Disposition: attachment;");
257 BIO_printf(bio, " filename=\"smime.p7s\"%s%s",
258 mime_eol, mime_eol);
259 B64_write_ASN1(bio, val, NULL, 0, it);
260 BIO_printf(bio,"%s------%s--%s%s", mime_eol, bound,
261 mime_eol, mime_eol);
262 return 1;
263 }
264
265 /* Determine smime-type header */
266
267 if (ctype_nid == NID_pkcs7_enveloped)
268 msg_type = "enveloped-data";
269 else if (ctype_nid == NID_pkcs7_signed)
270 {
271 if (econt_nid == NID_id_smime_ct_receipt)
272 msg_type = "signed-receipt";
273 else if (sk_X509_ALGOR_num(mdalgs) >= 0)
274 msg_type = "signed-data";
275 else
276 msg_type = "certs-only";
277 }
278 else if (ctype_nid == NID_id_smime_ct_compressedData)
279 {
280 msg_type = "compressed-data";
281 cname = "smime.p7z";
282 }
283 /* MIME headers */
284 BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol);
285 BIO_printf(bio, "Content-Disposition: attachment;");
286 BIO_printf(bio, " filename=\"%s\"%s", cname, mime_eol);
287 BIO_printf(bio, "Content-Type: %smime;", mime_prefix);
288 if (msg_type)
289 BIO_printf(bio, " smime-type=%s;", msg_type);
290 BIO_printf(bio, " name=\"%s\"%s", cname, mime_eol);
291 BIO_printf(bio, "Content-Transfer-Encoding: base64%s%s",
292 mime_eol, mime_eol);
293 if (!B64_write_ASN1(bio, val, data, flags, it))
294 return 0;
295 BIO_printf(bio, "%s", mime_eol);
296 return 1;
297}
298
299#if 0
300
301/* Handle output of ASN1 data */
302
303
304static int asn1_output_data(BIO *out, BIO *data, ASN1_VALUE *val, int flags,
305 const ASN1_ITEM *it)
306 {
307 BIO *tmpbio;
308 const ASN1_AUX *aux = it->funcs;
309 ASN1_STREAM_ARG sarg;
310
311 if (!(flags & SMIME_DETACHED))
312 {
313 SMIME_crlf_copy(data, out, flags);
314 return 1;
315 }
316
317 if (!aux || !aux->asn1_cb)
318 {
319 ASN1err(ASN1_F_ASN1_OUTPUT_DATA,
320 ASN1_R_STREAMING_NOT_SUPPORTED);
321 return 0;
322 }
323
324 sarg.out = out;
325 sarg.ndef_bio = NULL;
326 sarg.boundary = NULL;
327
328 /* Let ASN1 code prepend any needed BIOs */
329
330 if (aux->asn1_cb(ASN1_OP_DETACHED_PRE, &val, it, &sarg) <= 0)
331 return 0;
332
333 /* Copy data across, passing through filter BIOs for processing */
334 SMIME_crlf_copy(data, sarg.ndef_bio, flags);
335
336 /* Finalize structure */
337 if (aux->asn1_cb(ASN1_OP_DETACHED_POST, &val, it, &sarg) <= 0)
338 return 0;
339
340 /* Now remove any digests prepended to the BIO */
341
342 while (sarg.ndef_bio != out)
343 {
344 tmpbio = BIO_pop(sarg.ndef_bio);
345 BIO_free(sarg.ndef_bio);
346 sarg.ndef_bio = tmpbio;
347 }
348
349 return 1;
350
351 }
352
353#endif
354
355/* SMIME reader: handle multipart/signed and opaque signing.
356 * in multipart case the content is placed in a memory BIO
357 * pointed to by "bcont". In opaque this is set to NULL
358 */
359
360ASN1_VALUE *SMIME_read_ASN1(BIO *bio, BIO **bcont, const ASN1_ITEM *it)
361{
362 BIO *asnin;
363 STACK_OF(MIME_HEADER) *headers = NULL;
364 STACK_OF(BIO) *parts = NULL;
365 MIME_HEADER *hdr;
366 MIME_PARAM *prm;
367 ASN1_VALUE *val;
368 int ret;
369
370 if(bcont) *bcont = NULL;
371
372 if (!(headers = mime_parse_hdr(bio))) {
373 ASN1err(ASN1_F_SMIME_READ_ASN1,ASN1_R_MIME_PARSE_ERROR);
374 return NULL;
375 }
376
377 if(!(hdr = mime_hdr_find(headers, "content-type")) || !hdr->value) {
378 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
379 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_CONTENT_TYPE);
380 return NULL;
381 }
382
383 /* Handle multipart/signed */
384
385 if(!strcmp(hdr->value, "multipart/signed")) {
386 /* Split into two parts */
387 prm = mime_param_find(hdr, "boundary");
388 if(!prm || !prm->param_value) {
389 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
390 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_MULTIPART_BOUNDARY);
391 return NULL;
392 }
393 ret = multi_split(bio, prm->param_value, &parts);
394 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
395 if(!ret || (sk_BIO_num(parts) != 2) ) {
396 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_MULTIPART_BODY_FAILURE);
397 sk_BIO_pop_free(parts, BIO_vfree);
398 return NULL;
399 }
400
401 /* Parse the signature piece */
402 asnin = sk_BIO_value(parts, 1);
403
404 if (!(headers = mime_parse_hdr(asnin))) {
405 ASN1err(ASN1_F_SMIME_READ_ASN1,ASN1_R_MIME_SIG_PARSE_ERROR);
406 sk_BIO_pop_free(parts, BIO_vfree);
407 return NULL;
408 }
409
410 /* Get content type */
411
412 if(!(hdr = mime_hdr_find(headers, "content-type")) ||
413 !hdr->value) {
414 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
415 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_SIG_CONTENT_TYPE);
416 return NULL;
417 }
418
419 if(strcmp(hdr->value, "application/x-pkcs7-signature") &&
420 strcmp(hdr->value, "application/pkcs7-signature")) {
421 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
422 ASN1err(ASN1_F_SMIME_READ_ASN1,ASN1_R_SIG_INVALID_MIME_TYPE);
423 ERR_add_error_data(2, "type: ", hdr->value);
424 sk_BIO_pop_free(parts, BIO_vfree);
425 return NULL;
426 }
427 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
428 /* Read in ASN1 */
429 if(!(val = b64_read_asn1(asnin, it))) {
430 ASN1err(ASN1_F_SMIME_READ_ASN1,ASN1_R_ASN1_SIG_PARSE_ERROR);
431 sk_BIO_pop_free(parts, BIO_vfree);
432 return NULL;
433 }
434
435 if(bcont) {
436 *bcont = sk_BIO_value(parts, 0);
437 BIO_free(asnin);
438 sk_BIO_free(parts);
439 } else sk_BIO_pop_free(parts, BIO_vfree);
440 return val;
441 }
442
443 /* OK, if not multipart/signed try opaque signature */
444
445 if (strcmp (hdr->value, "application/x-pkcs7-mime") &&
446 strcmp (hdr->value, "application/pkcs7-mime")) {
447 ASN1err(ASN1_F_SMIME_READ_ASN1,ASN1_R_INVALID_MIME_TYPE);
448 ERR_add_error_data(2, "type: ", hdr->value);
449 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
450 return NULL;
451 }
452
453 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
454
455 if(!(val = b64_read_asn1(bio, it))) {
456 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_ASN1_PARSE_ERROR);
457 return NULL;
458 }
459 return val;
460
461}
462
463/* Copy text from one BIO to another making the output CRLF at EOL */
464int SMIME_crlf_copy(BIO *in, BIO *out, int flags)
465{
466 BIO *bf;
467 char eol;
468 int len;
469 char linebuf[MAX_SMLEN];
470 /* Buffer output so we don't write one line at a time. This is
471 * useful when streaming as we don't end up with one OCTET STRING
472 * per line.
473 */
474 bf = BIO_new(BIO_f_buffer());
475 if (!bf)
476 return 0;
477 out = BIO_push(bf, out);
478 if(flags & SMIME_BINARY)
479 {
480 while((len = BIO_read(in, linebuf, MAX_SMLEN)) > 0)
481 BIO_write(out, linebuf, len);
482 }
483 else
484 {
485 if(flags & SMIME_TEXT)
486 BIO_printf(out, "Content-Type: text/plain\r\n\r\n");
487 while ((len = BIO_gets(in, linebuf, MAX_SMLEN)) > 0)
488 {
489 eol = strip_eol(linebuf, &len);
490 if (len)
491 BIO_write(out, linebuf, len);
492 if(eol) BIO_write(out, "\r\n", 2);
493 }
494 }
495 (void)BIO_flush(out);
496 BIO_pop(out);
497 BIO_free(bf);
498 return 1;
499}
500
501/* Strip off headers if they are text/plain */
502int SMIME_text(BIO *in, BIO *out)
503{
504 char iobuf[4096];
505 int len;
506 STACK_OF(MIME_HEADER) *headers;
507 MIME_HEADER *hdr;
508
509 if (!(headers = mime_parse_hdr(in))) {
510 ASN1err(ASN1_F_SMIME_TEXT,ASN1_R_MIME_PARSE_ERROR);
511 return 0;
512 }
513 if(!(hdr = mime_hdr_find(headers, "content-type")) || !hdr->value) {
514 ASN1err(ASN1_F_SMIME_TEXT,ASN1_R_MIME_NO_CONTENT_TYPE);
515 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
516 return 0;
517 }
518 if (strcmp (hdr->value, "text/plain")) {
519 ASN1err(ASN1_F_SMIME_TEXT,ASN1_R_INVALID_MIME_TYPE);
520 ERR_add_error_data(2, "type: ", hdr->value);
521 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
522 return 0;
523 }
524 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
525 while ((len = BIO_read(in, iobuf, sizeof(iobuf))) > 0)
526 BIO_write(out, iobuf, len);
527 if (len < 0)
528 return 0;
529 return 1;
530}
531
532/* Split a multipart/XXX message body into component parts: result is
533 * canonical parts in a STACK of bios
534 */
535
536static int multi_split(BIO *bio, char *bound, STACK_OF(BIO) **ret)
537{
538 char linebuf[MAX_SMLEN];
539 int len, blen;
540 int eol = 0, next_eol = 0;
541 BIO *bpart = NULL;
542 STACK_OF(BIO) *parts;
543 char state, part, first;
544
545 blen = strlen(bound);
546 part = 0;
547 state = 0;
548 first = 1;
549 parts = sk_BIO_new_null();
550 *ret = parts;
551 while ((len = BIO_gets(bio, linebuf, MAX_SMLEN)) > 0) {
552 state = mime_bound_check(linebuf, len, bound, blen);
553 if(state == 1) {
554 first = 1;
555 part++;
556 } else if(state == 2) {
557 sk_BIO_push(parts, bpart);
558 return 1;
559 } else if(part) {
560 /* Strip CR+LF from linebuf */
561 next_eol = strip_eol(linebuf, &len);
562 if(first) {
563 first = 0;
564 if(bpart) sk_BIO_push(parts, bpart);
565 bpart = BIO_new(BIO_s_mem());
566 BIO_set_mem_eof_return(bpart, 0);
567 } else if (eol)
568 BIO_write(bpart, "\r\n", 2);
569 eol = next_eol;
570 if (len)
571 BIO_write(bpart, linebuf, len);
572 }
573 }
574 return 0;
575}
576
577/* This is the big one: parse MIME header lines up to message body */
578
579#define MIME_INVALID 0
580#define MIME_START 1
581#define MIME_TYPE 2
582#define MIME_NAME 3
583#define MIME_VALUE 4
584#define MIME_QUOTE 5
585#define MIME_COMMENT 6
586
587
588static STACK_OF(MIME_HEADER) *mime_parse_hdr(BIO *bio)
589{
590 char *p, *q, c;
591 char *ntmp;
592 char linebuf[MAX_SMLEN];
593 MIME_HEADER *mhdr = NULL;
594 STACK_OF(MIME_HEADER) *headers;
595 int len, state, save_state = 0;
596
597 headers = sk_MIME_HEADER_new(mime_hdr_cmp);
598 while ((len = BIO_gets(bio, linebuf, MAX_SMLEN)) > 0) {
599 /* If whitespace at line start then continuation line */
600 if(mhdr && isspace((unsigned char)linebuf[0])) state = MIME_NAME;
601 else state = MIME_START;
602 ntmp = NULL;
603 /* Go through all characters */
604 for(p = linebuf, q = linebuf; (c = *p) && (c!='\r') && (c!='\n'); p++) {
605
606 /* State machine to handle MIME headers
607 * if this looks horrible that's because it *is*
608 */
609
610 switch(state) {
611 case MIME_START:
612 if(c == ':') {
613 state = MIME_TYPE;
614 *p = 0;
615 ntmp = strip_ends(q);
616 q = p + 1;
617 }
618 break;
619
620 case MIME_TYPE:
621 if(c == ';') {
622 mime_debug("Found End Value\n");
623 *p = 0;
624 mhdr = mime_hdr_new(ntmp, strip_ends(q));
625 sk_MIME_HEADER_push(headers, mhdr);
626 ntmp = NULL;
627 q = p + 1;
628 state = MIME_NAME;
629 } else if(c == '(') {
630 save_state = state;
631 state = MIME_COMMENT;
632 }
633 break;
634
635 case MIME_COMMENT:
636 if(c == ')') {
637 state = save_state;
638 }
639 break;
640
641 case MIME_NAME:
642 if(c == '=') {
643 state = MIME_VALUE;
644 *p = 0;
645 ntmp = strip_ends(q);
646 q = p + 1;
647 }
648 break ;
649
650 case MIME_VALUE:
651 if(c == ';') {
652 state = MIME_NAME;
653 *p = 0;
654 mime_hdr_addparam(mhdr, ntmp, strip_ends(q));
655 ntmp = NULL;
656 q = p + 1;
657 } else if (c == '"') {
658 mime_debug("Found Quote\n");
659 state = MIME_QUOTE;
660 } else if(c == '(') {
661 save_state = state;
662 state = MIME_COMMENT;
663 }
664 break;
665
666 case MIME_QUOTE:
667 if(c == '"') {
668 mime_debug("Found Match Quote\n");
669 state = MIME_VALUE;
670 }
671 break;
672 }
673 }
674
675 if(state == MIME_TYPE) {
676 mhdr = mime_hdr_new(ntmp, strip_ends(q));
677 sk_MIME_HEADER_push(headers, mhdr);
678 } else if(state == MIME_VALUE)
679 mime_hdr_addparam(mhdr, ntmp, strip_ends(q));
680 if(p == linebuf) break; /* Blank line means end of headers */
681}
682
683return headers;
684
685}
686
687static char *strip_ends(char *name)
688{
689 return strip_end(strip_start(name));
690}
691
692/* Strip a parameter of whitespace from start of param */
693static char *strip_start(char *name)
694{
695 char *p, c;
696 /* Look for first non white space or quote */
697 for(p = name; (c = *p) ;p++) {
698 if(c == '"') {
699 /* Next char is start of string if non null */
700 if(p[1]) return p + 1;
701 /* Else null string */
702 return NULL;
703 }
704 if(!isspace((unsigned char)c)) return p;
705 }
706 return NULL;
707}
708
709/* As above but strip from end of string : maybe should handle brackets? */
710static char *strip_end(char *name)
711{
712 char *p, c;
713 if(!name) return NULL;
714 /* Look for first non white space or quote */
715 for(p = name + strlen(name) - 1; p >= name ;p--) {
716 c = *p;
717 if(c == '"') {
718 if(p - 1 == name) return NULL;
719 *p = 0;
720 return name;
721 }
722 if(isspace((unsigned char)c)) *p = 0;
723 else return name;
724 }
725 return NULL;
726}
727
728static MIME_HEADER *mime_hdr_new(char *name, char *value)
729{
730 MIME_HEADER *mhdr;
731 char *tmpname, *tmpval, *p;
732 int c;
733 if(name) {
734 if(!(tmpname = BUF_strdup(name))) return NULL;
735 for(p = tmpname ; *p; p++) {
736 c = *p;
737 if(isupper(c)) {
738 c = tolower(c);
739 *p = c;
740 }
741 }
742 } else tmpname = NULL;
743 if(value) {
744 if(!(tmpval = BUF_strdup(value))) return NULL;
745 for(p = tmpval ; *p; p++) {
746 c = *p;
747 if(isupper(c)) {
748 c = tolower(c);
749 *p = c;
750 }
751 }
752 } else tmpval = NULL;
753 mhdr = (MIME_HEADER *) OPENSSL_malloc(sizeof(MIME_HEADER));
754 if(!mhdr) return NULL;
755 mhdr->name = tmpname;
756 mhdr->value = tmpval;
757 if(!(mhdr->params = sk_MIME_PARAM_new(mime_param_cmp))) return NULL;
758 return mhdr;
759}
760
761static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value)
762{
763 char *tmpname, *tmpval, *p;
764 int c;
765 MIME_PARAM *mparam;
766 if(name) {
767 tmpname = BUF_strdup(name);
768 if(!tmpname) return 0;
769 for(p = tmpname ; *p; p++) {
770 c = *p;
771 if(isupper(c)) {
772 c = tolower(c);
773 *p = c;
774 }
775 }
776 } else tmpname = NULL;
777 if(value) {
778 tmpval = BUF_strdup(value);
779 if(!tmpval) return 0;
780 } else tmpval = NULL;
781 /* Parameter values are case sensitive so leave as is */
782 mparam = (MIME_PARAM *) OPENSSL_malloc(sizeof(MIME_PARAM));
783 if(!mparam) return 0;
784 mparam->param_name = tmpname;
785 mparam->param_value = tmpval;
786 sk_MIME_PARAM_push(mhdr->params, mparam);
787 return 1;
788}
789
790static int mime_hdr_cmp(const MIME_HEADER * const *a,
791 const MIME_HEADER * const *b)
792{
793 return(strcmp((*a)->name, (*b)->name));
794}
795
796static int mime_param_cmp(const MIME_PARAM * const *a,
797 const MIME_PARAM * const *b)
798{
799 return(strcmp((*a)->param_name, (*b)->param_name));
800}
801
802/* Find a header with a given name (if possible) */
803
804static MIME_HEADER *mime_hdr_find(STACK_OF(MIME_HEADER) *hdrs, char *name)
805{
806 MIME_HEADER htmp;
807 int idx;
808 htmp.name = name;
809 idx = sk_MIME_HEADER_find(hdrs, &htmp);
810 if(idx < 0) return NULL;
811 return sk_MIME_HEADER_value(hdrs, idx);
812}
813
814static MIME_PARAM *mime_param_find(MIME_HEADER *hdr, char *name)
815{
816 MIME_PARAM param;
817 int idx;
818 param.param_name = name;
819 idx = sk_MIME_PARAM_find(hdr->params, &param);
820 if(idx < 0) return NULL;
821 return sk_MIME_PARAM_value(hdr->params, idx);
822}
823
824static void mime_hdr_free(MIME_HEADER *hdr)
825{
826 if(hdr->name) OPENSSL_free(hdr->name);
827 if(hdr->value) OPENSSL_free(hdr->value);
828 if(hdr->params) sk_MIME_PARAM_pop_free(hdr->params, mime_param_free);
829 OPENSSL_free(hdr);
830}
831
832static void mime_param_free(MIME_PARAM *param)
833{
834 if(param->param_name) OPENSSL_free(param->param_name);
835 if(param->param_value) OPENSSL_free(param->param_value);
836 OPENSSL_free(param);
837}
838
839/* Check for a multipart boundary. Returns:
840 * 0 : no boundary
841 * 1 : part boundary
842 * 2 : final boundary
843 */
844static int mime_bound_check(char *line, int linelen, char *bound, int blen)
845{
846 if(linelen == -1) linelen = strlen(line);
847 if(blen == -1) blen = strlen(bound);
848 /* Quickly eliminate if line length too short */
849 if(blen + 2 > linelen) return 0;
850 /* Check for part boundary */
851 if(!strncmp(line, "--", 2) && !strncmp(line + 2, bound, blen)) {
852 if(!strncmp(line + blen + 2, "--", 2)) return 2;
853 else return 1;
854 }
855 return 0;
856}
857
858static int strip_eol(char *linebuf, int *plen)
859 {
860 int len = *plen;
861 char *p, c;
862 int is_eol = 0;
863 p = linebuf + len - 1;
864 for (p = linebuf + len - 1; len > 0; len--, p--)
865 {
866 c = *p;
867 if (c == '\n')
868 is_eol = 1;
869 else if (c != '\r')
870 break;
871 }
872 *plen = len;
873 return is_eol;
874 }
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-04-03 03:55:57 +0000