3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
6 /* ====================================================================
7 * Copyright (c) 1999-2008 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * 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
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
59 #include <openssl/rand.h>
60 #include <openssl/x509.h>
61 #include <openssl/asn1.h>
62 #include <openssl/asn1t.h>
63 #include "asn1_locl.h"
66 * Generalised MIME like utilities for streaming ASN1. Although many have a
67 * PKCS7/CMS like flavour others are more general purpose.
71 * MIME format structures Note that all are translated to lower case apart
72 * from parameter values. Quotes are stripped off
76 char *param_name; /* Param name e.g. "micalg" */
77 char *param_value; /* Param value e.g. "sha1" */
80 DECLARE_STACK_OF(MIME_PARAM)
81 IMPLEMENT_STACK_OF(MIME_PARAM)
84 char *name; /* Name of line e.g. "content-type" */
85 char *value; /* Value of line e.g. "text/plain" */
86 STACK_OF(MIME_PARAM) *params; /* Zero or more parameters */
89 DECLARE_STACK_OF(MIME_HEADER)
90 IMPLEMENT_STACK_OF(MIME_HEADER)
92 static int asn1_output_data(BIO *out, BIO *data, ASN1_VALUE *val, int flags,
94 static char *strip_ends(char *name);
95 static char *strip_start(char *name);
96 static char *strip_end(char *name);
97 static MIME_HEADER *mime_hdr_new(char *name, char *value);
98 static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value);
99 static STACK_OF(MIME_HEADER) *mime_parse_hdr(BIO *bio);
100 static int mime_hdr_cmp(const MIME_HEADER *const *a,
101 const MIME_HEADER *const *b);
102 static int mime_param_cmp(const MIME_PARAM *const *a,
103 const MIME_PARAM *const *b);
104 static void mime_param_free(MIME_PARAM *param);
105 static int mime_bound_check(char *line, int linelen, char *bound, int blen);
106 static int multi_split(BIO *bio, char *bound, STACK_OF(BIO) **ret);
107 static int strip_eol(char *linebuf, int *plen);
108 static MIME_HEADER *mime_hdr_find(STACK_OF(MIME_HEADER) *hdrs, char *name);
109 static MIME_PARAM *mime_param_find(MIME_HEADER *hdr, char *name);
110 static void mime_hdr_free(MIME_HEADER *hdr);
112 #define MAX_SMLEN 1024
113 #define mime_debug(x) /* x */
115 /* Output an ASN1 structure in BER format streaming if necessary */
117 int i2d_ASN1_bio_stream(BIO *out, ASN1_VALUE *val, BIO *in, int flags,
120 /* If streaming create stream BIO and copy all content through it */
121 if (flags & SMIME_STREAM) {
123 bio = BIO_new_NDEF(out, val, it);
125 ASN1err(ASN1_F_I2D_ASN1_BIO_STREAM, ERR_R_MALLOC_FAILURE);
128 SMIME_crlf_copy(in, bio, flags);
129 (void)BIO_flush(bio);
130 /* Free up successive BIOs until we hit the old output BIO */
135 } while (bio != out);
138 * else just write out ASN1 structure which will have all content stored
142 ASN1_item_i2d_bio(it, out, val);
146 /* Base 64 read and write of ASN1 structure */
148 static int B64_write_ASN1(BIO *out, ASN1_VALUE *val, BIO *in, int flags,
153 b64 = BIO_new(BIO_f_base64());
155 ASN1err(ASN1_F_B64_WRITE_ASN1, ERR_R_MALLOC_FAILURE);
159 * prepend the b64 BIO so all data is base64 encoded.
161 out = BIO_push(b64, out);
162 r = i2d_ASN1_bio_stream(out, val, in, flags, it);
163 (void)BIO_flush(out);
169 /* Streaming ASN1 PEM write */
171 int PEM_write_bio_ASN1_stream(BIO *out, ASN1_VALUE *val, BIO *in, int flags,
172 const char *hdr, const ASN1_ITEM *it)
175 BIO_printf(out, "-----BEGIN %s-----\n", hdr);
176 r = B64_write_ASN1(out, val, in, flags, it);
177 BIO_printf(out, "-----END %s-----\n", hdr);
181 static ASN1_VALUE *b64_read_asn1(BIO *bio, const ASN1_ITEM *it)
185 if (!(b64 = BIO_new(BIO_f_base64()))) {
186 ASN1err(ASN1_F_B64_READ_ASN1, ERR_R_MALLOC_FAILURE);
189 bio = BIO_push(b64, bio);
190 val = ASN1_item_d2i_bio(it, bio, NULL);
192 ASN1err(ASN1_F_B64_READ_ASN1, ASN1_R_DECODE_ERROR);
193 (void)BIO_flush(bio);
199 /* Generate the MIME "micalg" parameter from RFC3851, RFC4490 */
201 static int asn1_write_micalg(BIO *out, STACK_OF(X509_ALGOR) *mdalgs)
204 int i, have_unknown = 0, write_comma, ret = 0, md_nid;
207 for (i = 0; i < sk_X509_ALGOR_num(mdalgs); i++) {
209 BIO_write(out, ",", 1);
211 md_nid = OBJ_obj2nid(sk_X509_ALGOR_value(mdalgs, i)->algorithm);
212 md = EVP_get_digestbynid(md_nid);
213 if (md && md->md_ctrl) {
216 rv = md->md_ctrl(NULL, EVP_MD_CTRL_MICALG, 0, &micstr);
218 BIO_puts(out, micstr);
219 OPENSSL_free(micstr);
227 BIO_puts(out, "sha1");
231 BIO_puts(out, "md5");
235 BIO_puts(out, "sha-256");
239 BIO_puts(out, "sha-384");
243 BIO_puts(out, "sha-512");
246 case NID_id_GostR3411_94:
247 BIO_puts(out, "gostr3411-94");
255 BIO_puts(out, "unknown");
272 int SMIME_write_ASN1(BIO *bio, ASN1_VALUE *val, BIO *data, int flags,
273 int ctype_nid, int econt_nid,
274 STACK_OF(X509_ALGOR) *mdalgs, const ASN1_ITEM *it)
278 const char *mime_prefix, *mime_eol, *cname = "smime.p7m";
279 const char *msg_type = NULL;
280 if (flags & SMIME_OLDMIME)
281 mime_prefix = "application/x-pkcs7-";
283 mime_prefix = "application/pkcs7-";
285 if (flags & SMIME_CRLFEOL)
289 if ((flags & SMIME_DETACHED) && data) {
290 /* We want multipart/signed */
291 /* Generate a random boundary */
292 if (RAND_bytes((unsigned char *)bound, 32) <= 0)
294 for (i = 0; i < 32; i++) {
303 BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol);
304 BIO_printf(bio, "Content-Type: multipart/signed;");
305 BIO_printf(bio, " protocol=\"%ssignature\";", mime_prefix);
306 BIO_puts(bio, " micalg=\"");
307 asn1_write_micalg(bio, mdalgs);
308 BIO_printf(bio, "\"; boundary=\"----%s\"%s%s",
309 bound, mime_eol, mime_eol);
310 BIO_printf(bio, "This is an S/MIME signed message%s%s",
312 /* Now write out the first part */
313 BIO_printf(bio, "------%s%s", bound, mime_eol);
314 if (!asn1_output_data(bio, data, val, flags, it))
316 BIO_printf(bio, "%s------%s%s", mime_eol, bound, mime_eol);
318 /* Headers for signature */
320 BIO_printf(bio, "Content-Type: %ssignature;", mime_prefix);
321 BIO_printf(bio, " name=\"smime.p7s\"%s", mime_eol);
322 BIO_printf(bio, "Content-Transfer-Encoding: base64%s", mime_eol);
323 BIO_printf(bio, "Content-Disposition: attachment;");
324 BIO_printf(bio, " filename=\"smime.p7s\"%s%s", mime_eol, mime_eol);
325 B64_write_ASN1(bio, val, NULL, 0, it);
326 BIO_printf(bio, "%s------%s--%s%s", mime_eol, bound,
331 /* Determine smime-type header */
333 if (ctype_nid == NID_pkcs7_enveloped)
334 msg_type = "enveloped-data";
335 else if (ctype_nid == NID_pkcs7_signed) {
336 if (econt_nid == NID_id_smime_ct_receipt)
337 msg_type = "signed-receipt";
338 else if (sk_X509_ALGOR_num(mdalgs) >= 0)
339 msg_type = "signed-data";
341 msg_type = "certs-only";
342 } else if (ctype_nid == NID_id_smime_ct_compressedData) {
343 msg_type = "compressed-data";
347 BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol);
348 BIO_printf(bio, "Content-Disposition: attachment;");
349 BIO_printf(bio, " filename=\"%s\"%s", cname, mime_eol);
350 BIO_printf(bio, "Content-Type: %smime;", mime_prefix);
352 BIO_printf(bio, " smime-type=%s;", msg_type);
353 BIO_printf(bio, " name=\"%s\"%s", cname, mime_eol);
354 BIO_printf(bio, "Content-Transfer-Encoding: base64%s%s",
356 if (!B64_write_ASN1(bio, val, data, flags, it))
358 BIO_printf(bio, "%s", mime_eol);
362 /* Handle output of ASN1 data */
364 static int asn1_output_data(BIO *out, BIO *data, ASN1_VALUE *val, int flags,
368 const ASN1_AUX *aux = it->funcs;
369 ASN1_STREAM_ARG sarg;
373 * If data is not deteched or resigning then the output BIO is already
374 * set up to finalise when it is written through.
376 if (!(flags & SMIME_DETACHED) || (flags & PKCS7_REUSE_DIGEST)) {
377 SMIME_crlf_copy(data, out, flags);
381 if (!aux || !aux->asn1_cb) {
382 ASN1err(ASN1_F_ASN1_OUTPUT_DATA, ASN1_R_STREAMING_NOT_SUPPORTED);
387 sarg.ndef_bio = NULL;
388 sarg.boundary = NULL;
390 /* Let ASN1 code prepend any needed BIOs */
392 if (aux->asn1_cb(ASN1_OP_DETACHED_PRE, &val, it, &sarg) <= 0)
395 /* Copy data across, passing through filter BIOs for processing */
396 SMIME_crlf_copy(data, sarg.ndef_bio, flags);
398 /* Finalize structure */
399 if (aux->asn1_cb(ASN1_OP_DETACHED_POST, &val, it, &sarg) <= 0)
402 /* Now remove any digests prepended to the BIO */
404 while (sarg.ndef_bio != out) {
405 tmpbio = BIO_pop(sarg.ndef_bio);
406 BIO_free(sarg.ndef_bio);
407 sarg.ndef_bio = tmpbio;
415 * SMIME reader: handle multipart/signed and opaque signing. in multipart
416 * case the content is placed in a memory BIO pointed to by "bcont". In
417 * opaque this is set to NULL
420 ASN1_VALUE *SMIME_read_ASN1(BIO *bio, BIO **bcont, const ASN1_ITEM *it)
423 STACK_OF(MIME_HEADER) *headers = NULL;
424 STACK_OF(BIO) *parts = NULL;
433 if (!(headers = mime_parse_hdr(bio))) {
434 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_MIME_PARSE_ERROR);
438 if (!(hdr = mime_hdr_find(headers, "content-type")) || !hdr->value) {
439 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
440 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_CONTENT_TYPE);
444 /* Handle multipart/signed */
446 if (!strcmp(hdr->value, "multipart/signed")) {
447 /* Split into two parts */
448 prm = mime_param_find(hdr, "boundary");
449 if (!prm || !prm->param_value) {
450 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
451 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_MULTIPART_BOUNDARY);
454 ret = multi_split(bio, prm->param_value, &parts);
455 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
456 if (!ret || (sk_BIO_num(parts) != 2)) {
457 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_MULTIPART_BODY_FAILURE);
458 sk_BIO_pop_free(parts, BIO_vfree);
462 /* Parse the signature piece */
463 asnin = sk_BIO_value(parts, 1);
465 if (!(headers = mime_parse_hdr(asnin))) {
466 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_MIME_SIG_PARSE_ERROR);
467 sk_BIO_pop_free(parts, BIO_vfree);
471 /* Get content type */
473 if (!(hdr = mime_hdr_find(headers, "content-type")) || !hdr->value) {
474 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
475 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_SIG_CONTENT_TYPE);
479 if (strcmp(hdr->value, "application/x-pkcs7-signature") &&
480 strcmp(hdr->value, "application/pkcs7-signature")) {
481 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_SIG_INVALID_MIME_TYPE);
482 ERR_add_error_data(2, "type: ", hdr->value);
483 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
484 sk_BIO_pop_free(parts, BIO_vfree);
487 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
489 if (!(val = b64_read_asn1(asnin, it))) {
490 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_ASN1_SIG_PARSE_ERROR);
491 sk_BIO_pop_free(parts, BIO_vfree);
496 *bcont = sk_BIO_value(parts, 0);
500 sk_BIO_pop_free(parts, BIO_vfree);
504 /* OK, if not multipart/signed try opaque signature */
506 if (strcmp(hdr->value, "application/x-pkcs7-mime") &&
507 strcmp(hdr->value, "application/pkcs7-mime")) {
508 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_INVALID_MIME_TYPE);
509 ERR_add_error_data(2, "type: ", hdr->value);
510 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
514 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
516 if (!(val = b64_read_asn1(bio, it))) {
517 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_ASN1_PARSE_ERROR);
524 /* Copy text from one BIO to another making the output CRLF at EOL */
525 int SMIME_crlf_copy(BIO *in, BIO *out, int flags)
530 char linebuf[MAX_SMLEN];
532 * Buffer output so we don't write one line at a time. This is useful
533 * when streaming as we don't end up with one OCTET STRING per line.
535 bf = BIO_new(BIO_f_buffer());
538 out = BIO_push(bf, out);
539 if (flags & SMIME_BINARY) {
540 while ((len = BIO_read(in, linebuf, MAX_SMLEN)) > 0)
541 BIO_write(out, linebuf, len);
543 if (flags & SMIME_TEXT)
544 BIO_printf(out, "Content-Type: text/plain\r\n\r\n");
545 while ((len = BIO_gets(in, linebuf, MAX_SMLEN)) > 0) {
546 eol = strip_eol(linebuf, &len);
548 BIO_write(out, linebuf, len);
550 BIO_write(out, "\r\n", 2);
553 (void)BIO_flush(out);
559 /* Strip off headers if they are text/plain */
560 int SMIME_text(BIO *in, BIO *out)
564 STACK_OF(MIME_HEADER) *headers;
567 if (!(headers = mime_parse_hdr(in))) {
568 ASN1err(ASN1_F_SMIME_TEXT, ASN1_R_MIME_PARSE_ERROR);
571 if (!(hdr = mime_hdr_find(headers, "content-type")) || !hdr->value) {
572 ASN1err(ASN1_F_SMIME_TEXT, ASN1_R_MIME_NO_CONTENT_TYPE);
573 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
576 if (strcmp(hdr->value, "text/plain")) {
577 ASN1err(ASN1_F_SMIME_TEXT, ASN1_R_INVALID_MIME_TYPE);
578 ERR_add_error_data(2, "type: ", hdr->value);
579 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
582 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
583 while ((len = BIO_read(in, iobuf, sizeof(iobuf))) > 0)
584 BIO_write(out, iobuf, len);
591 * Split a multipart/XXX message body into component parts: result is
592 * canonical parts in a STACK of bios
595 static int multi_split(BIO *bio, char *bound, STACK_OF(BIO) **ret)
597 char linebuf[MAX_SMLEN];
599 int eol = 0, next_eol = 0;
601 STACK_OF(BIO) *parts;
602 char state, part, first;
604 blen = strlen(bound);
608 parts = sk_BIO_new_null();
610 while ((len = BIO_gets(bio, linebuf, MAX_SMLEN)) > 0) {
611 state = mime_bound_check(linebuf, len, bound, blen);
615 } else if (state == 2) {
616 sk_BIO_push(parts, bpart);
619 /* Strip CR+LF from linebuf */
620 next_eol = strip_eol(linebuf, &len);
624 sk_BIO_push(parts, bpart);
625 bpart = BIO_new(BIO_s_mem());
628 BIO_set_mem_eof_return(bpart, 0);
630 BIO_write(bpart, "\r\n", 2);
633 BIO_write(bpart, linebuf, len);
639 /* This is the big one: parse MIME header lines up to message body */
641 #define MIME_INVALID 0
647 #define MIME_COMMENT 6
649 static STACK_OF(MIME_HEADER) *mime_parse_hdr(BIO *bio)
653 char linebuf[MAX_SMLEN];
654 MIME_HEADER *mhdr = NULL;
655 STACK_OF(MIME_HEADER) *headers;
656 int len, state, save_state = 0;
658 headers = sk_MIME_HEADER_new(mime_hdr_cmp);
661 while ((len = BIO_gets(bio, linebuf, MAX_SMLEN)) > 0) {
662 /* If whitespace at line start then continuation line */
663 if (mhdr && isspace((unsigned char)linebuf[0]))
668 /* Go through all characters */
669 for (p = linebuf, q = linebuf; (c = *p) && (c != '\r') && (c != '\n');
673 * State machine to handle MIME headers if this looks horrible
674 * that's because it *is*
682 ntmp = strip_ends(q);
689 mime_debug("Found End Value\n");
691 mhdr = mime_hdr_new(ntmp, strip_ends(q));
692 sk_MIME_HEADER_push(headers, mhdr);
696 } else if (c == '(') {
698 state = MIME_COMMENT;
712 ntmp = strip_ends(q);
721 mime_hdr_addparam(mhdr, ntmp, strip_ends(q));
724 } else if (c == '"') {
725 mime_debug("Found Quote\n");
727 } else if (c == '(') {
729 state = MIME_COMMENT;
735 mime_debug("Found Match Quote\n");
742 if (state == MIME_TYPE) {
743 mhdr = mime_hdr_new(ntmp, strip_ends(q));
744 sk_MIME_HEADER_push(headers, mhdr);
745 } else if (state == MIME_VALUE)
746 mime_hdr_addparam(mhdr, ntmp, strip_ends(q));
748 break; /* Blank line means end of headers */
755 static char *strip_ends(char *name)
757 return strip_end(strip_start(name));
760 /* Strip a parameter of whitespace from start of param */
761 static char *strip_start(char *name)
764 /* Look for first non white space or quote */
765 for (p = name; (c = *p); p++) {
767 /* Next char is start of string if non null */
770 /* Else null string */
773 if (!isspace((unsigned char)c))
779 /* As above but strip from end of string : maybe should handle brackets? */
780 static char *strip_end(char *name)
785 /* Look for first non white space or quote */
786 for (p = name + strlen(name) - 1; p >= name; p--) {
794 if (isspace((unsigned char)c))
802 static MIME_HEADER *mime_hdr_new(char *name, char *value)
805 char *tmpname, *tmpval, *p;
808 if (!(tmpname = BUF_strdup(name)))
810 for (p = tmpname; *p; p++) {
811 c = (unsigned char)*p;
820 if (!(tmpval = BUF_strdup(value)))
822 for (p = tmpval; *p; p++) {
823 c = (unsigned char)*p;
831 mhdr = (MIME_HEADER *)OPENSSL_malloc(sizeof(MIME_HEADER));
834 mhdr->name = tmpname;
835 mhdr->value = tmpval;
836 if (!(mhdr->params = sk_MIME_PARAM_new(mime_param_cmp)))
841 static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value)
843 char *tmpname, *tmpval, *p;
847 tmpname = BUF_strdup(name);
850 for (p = tmpname; *p; p++) {
851 c = (unsigned char)*p;
860 tmpval = BUF_strdup(value);
865 /* Parameter values are case sensitive so leave as is */
866 mparam = (MIME_PARAM *)OPENSSL_malloc(sizeof(MIME_PARAM));
869 mparam->param_name = tmpname;
870 mparam->param_value = tmpval;
871 sk_MIME_PARAM_push(mhdr->params, mparam);
875 static int mime_hdr_cmp(const MIME_HEADER *const *a,
876 const MIME_HEADER *const *b)
878 if (!(*a)->name || !(*b)->name)
879 return ! !(*a)->name - ! !(*b)->name;
881 return (strcmp((*a)->name, (*b)->name));
884 static int mime_param_cmp(const MIME_PARAM *const *a,
885 const MIME_PARAM *const *b)
887 if (!(*a)->param_name || !(*b)->param_name)
888 return ! !(*a)->param_name - ! !(*b)->param_name;
889 return (strcmp((*a)->param_name, (*b)->param_name));
892 /* Find a header with a given name (if possible) */
894 static MIME_HEADER *mime_hdr_find(STACK_OF(MIME_HEADER) *hdrs, char *name)
899 idx = sk_MIME_HEADER_find(hdrs, &htmp);
902 return sk_MIME_HEADER_value(hdrs, idx);
905 static MIME_PARAM *mime_param_find(MIME_HEADER *hdr, char *name)
909 param.param_name = name;
910 idx = sk_MIME_PARAM_find(hdr->params, ¶m);
913 return sk_MIME_PARAM_value(hdr->params, idx);
916 static void mime_hdr_free(MIME_HEADER *hdr)
919 OPENSSL_free(hdr->name);
921 OPENSSL_free(hdr->value);
923 sk_MIME_PARAM_pop_free(hdr->params, mime_param_free);
927 static void mime_param_free(MIME_PARAM *param)
929 if (param->param_name)
930 OPENSSL_free(param->param_name);
931 if (param->param_value)
932 OPENSSL_free(param->param_value);
937 * Check for a multipart boundary. Returns:
942 static int mime_bound_check(char *line, int linelen, char *bound, int blen)
945 linelen = strlen(line);
947 blen = strlen(bound);
948 /* Quickly eliminate if line length too short */
949 if (blen + 2 > linelen)
951 /* Check for part boundary */
952 if (!strncmp(line, "--", 2) && !strncmp(line + 2, bound, blen)) {
953 if (!strncmp(line + blen + 2, "--", 2))
961 static int strip_eol(char *linebuf, int *plen)
966 p = linebuf + len - 1;
967 for (p = linebuf + len - 1; len > 0; len--, p--) {