2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 1999-2008 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
58 #include <openssl/rand.h>
59 #include <openssl/x509.h>
60 #include <openssl/asn1.h>
61 #include <openssl/asn1t.h>
62 #include "asn1_locl.h"
64 /* Generalised MIME like utilities for streaming ASN1. Although many
65 * have a PKCS7/CMS like flavour others are more general purpose.
68 /* MIME format structures
69 * Note that all are translated to lower case apart from
70 * parameter values. Quotes are stripped off
74 char *param_name; /* Param name e.g. "micalg" */
75 char *param_value; /* Param value e.g. "sha1" */
78 DECLARE_STACK_OF(MIME_PARAM)
79 IMPLEMENT_STACK_OF(MIME_PARAM)
82 char *name; /* Name of line e.g. "content-type" */
83 char *value; /* Value of line e.g. "text/plain" */
84 STACK_OF(MIME_PARAM) *params; /* Zero or more parameters */
87 DECLARE_STACK_OF(MIME_HEADER)
88 IMPLEMENT_STACK_OF(MIME_HEADER)
90 static int asn1_output_data(BIO *out, BIO *data, ASN1_VALUE *val, int flags,
92 static char * strip_ends(char *name);
93 static char * strip_start(char *name);
94 static char * strip_end(char *name);
95 static MIME_HEADER *mime_hdr_new(char *name, char *value);
96 static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value);
97 static STACK_OF(MIME_HEADER) *mime_parse_hdr(BIO *bio);
98 static int mime_hdr_cmp(const MIME_HEADER * const *a,
99 const MIME_HEADER * const *b);
100 static int mime_param_cmp(const MIME_PARAM * const *a,
101 const MIME_PARAM * const *b);
102 static void mime_param_free(MIME_PARAM *param);
103 static int mime_bound_check(char *line, int linelen, char *bound, int blen);
104 static int multi_split(BIO *bio, char *bound, STACK_OF(BIO) **ret);
105 static int strip_eol(char *linebuf, int *plen);
106 static MIME_HEADER *mime_hdr_find(STACK_OF(MIME_HEADER) *hdrs, char *name);
107 static MIME_PARAM *mime_param_find(MIME_HEADER *hdr, char *name);
108 static void mime_hdr_free(MIME_HEADER *hdr);
110 #define MAX_SMLEN 1024
111 #define mime_debug(x) /* x */
113 /* Output an ASN1 structure in BER format streaming if necessary */
115 int i2d_ASN1_bio_stream(BIO *out, ASN1_VALUE *val, BIO *in, int flags,
118 /* If streaming create stream BIO and copy all content through it */
119 if (flags & SMIME_STREAM)
122 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 */
136 } while (bio != out);
138 /* else just write out ASN1 structure which will have all content
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());
156 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,
176 BIO_printf(out, "-----BEGIN %s-----\n", hdr);
177 r = B64_write_ASN1(out, val, in, flags, it);
178 BIO_printf(out, "-----END %s-----\n", hdr);
182 static ASN1_VALUE *b64_read_asn1(BIO *bio, const ASN1_ITEM *it)
186 if(!(b64 = BIO_new(BIO_f_base64()))) {
187 ASN1err(ASN1_F_B64_READ_ASN1,ERR_R_MALLOC_FAILURE);
190 bio = BIO_push(b64, bio);
191 val = ASN1_item_d2i_bio(it, bio, NULL);
193 ASN1err(ASN1_F_B64_READ_ASN1,ASN1_R_DECODE_ERROR);
194 (void)BIO_flush(bio);
200 /* Generate the MIME "micalg" parameter from RFC3851, RFC4490 */
202 static int asn1_write_micalg(BIO *out, STACK_OF(X509_ALGOR) *mdalgs)
205 int i, have_unknown = 0, write_comma, ret = 0, md_nid;
208 for (i = 0; i < sk_X509_ALGOR_num(mdalgs); i++)
211 BIO_write(out, ",", 1);
213 md_nid = OBJ_obj2nid(sk_X509_ALGOR_value(mdalgs, i)->algorithm);
214 md = EVP_get_digestbynid(md_nid);
215 if (md && md->md_ctrl)
219 rv = md->md_ctrl(NULL, EVP_MD_CTRL_MICALG, 0, &micstr);
222 BIO_puts(out, micstr);
223 OPENSSL_free(micstr);
232 BIO_puts(out, "sha1");
236 BIO_puts(out, "md5");
240 BIO_puts(out, "sha-256");
244 BIO_puts(out, "sha-384");
248 BIO_puts(out, "sha-512");
251 case NID_id_GostR3411_94:
252 BIO_puts(out, "gostr3411-94");
261 BIO_puts(out, "unknown");
278 int SMIME_write_ASN1(BIO *bio, ASN1_VALUE *val, BIO *data, int flags,
279 int ctype_nid, int econt_nid,
280 STACK_OF(X509_ALGOR) *mdalgs,
285 const char *mime_prefix, *mime_eol, *cname = "smime.p7m";
286 const char *msg_type=NULL;
287 if (flags & SMIME_OLDMIME)
288 mime_prefix = "application/x-pkcs7-";
290 mime_prefix = "application/pkcs7-";
292 if (flags & SMIME_CRLFEOL)
296 if((flags & SMIME_DETACHED) && data) {
297 /* We want multipart/signed */
298 /* Generate a random boundary */
299 RAND_pseudo_bytes((unsigned char *)bound, 32);
300 for(i = 0; i < 32; i++) {
307 BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol);
308 BIO_printf(bio, "Content-Type: multipart/signed;");
309 BIO_printf(bio, " protocol=\"%ssignature\";", mime_prefix);
310 BIO_puts(bio, " micalg=\"");
311 asn1_write_micalg(bio, mdalgs);
312 BIO_printf(bio, "\"; boundary=\"----%s\"%s%s",
313 bound, mime_eol, mime_eol);
314 BIO_printf(bio, "This is an S/MIME signed message%s%s",
316 /* Now write out the first part */
317 BIO_printf(bio, "------%s%s", bound, mime_eol);
318 if (!asn1_output_data(bio, data, val, flags, it))
320 BIO_printf(bio, "%s------%s%s", mime_eol, bound, mime_eol);
322 /* Headers for signature */
324 BIO_printf(bio, "Content-Type: %ssignature;", mime_prefix);
325 BIO_printf(bio, " name=\"smime.p7s\"%s", mime_eol);
326 BIO_printf(bio, "Content-Transfer-Encoding: base64%s",
328 BIO_printf(bio, "Content-Disposition: attachment;");
329 BIO_printf(bio, " filename=\"smime.p7s\"%s%s",
331 B64_write_ASN1(bio, val, NULL, 0, it);
332 BIO_printf(bio,"%s------%s--%s%s", mime_eol, bound,
337 /* Determine smime-type header */
339 if (ctype_nid == NID_pkcs7_enveloped)
340 msg_type = "enveloped-data";
341 else if (ctype_nid == NID_pkcs7_signed)
343 if (econt_nid == NID_id_smime_ct_receipt)
344 msg_type = "signed-receipt";
345 else if (sk_X509_ALGOR_num(mdalgs) >= 0)
346 msg_type = "signed-data";
348 msg_type = "certs-only";
350 else if (ctype_nid == NID_id_smime_ct_compressedData)
352 msg_type = "compressed-data";
356 BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol);
357 BIO_printf(bio, "Content-Disposition: attachment;");
358 BIO_printf(bio, " filename=\"%s\"%s", cname, mime_eol);
359 BIO_printf(bio, "Content-Type: %smime;", mime_prefix);
361 BIO_printf(bio, " smime-type=%s;", msg_type);
362 BIO_printf(bio, " name=\"%s\"%s", cname, mime_eol);
363 BIO_printf(bio, "Content-Transfer-Encoding: base64%s%s",
365 if (!B64_write_ASN1(bio, val, data, flags, it))
367 BIO_printf(bio, "%s", mime_eol);
371 /* Handle output of ASN1 data */
374 static int asn1_output_data(BIO *out, BIO *data, ASN1_VALUE *val, int flags,
378 const ASN1_AUX *aux = it->funcs;
379 ASN1_STREAM_ARG sarg;
381 if (!(flags & SMIME_DETACHED))
383 SMIME_crlf_copy(data, out, flags);
387 if (!aux || !aux->asn1_cb)
389 ASN1err(ASN1_F_ASN1_OUTPUT_DATA,
390 ASN1_R_STREAMING_NOT_SUPPORTED);
395 sarg.ndef_bio = NULL;
396 sarg.boundary = NULL;
398 /* Let ASN1 code prepend any needed BIOs */
400 if (aux->asn1_cb(ASN1_OP_DETACHED_PRE, &val, it, &sarg) <= 0)
403 /* Copy data across, passing through filter BIOs for processing */
404 SMIME_crlf_copy(data, sarg.ndef_bio, flags);
406 /* Finalize structure */
407 if (aux->asn1_cb(ASN1_OP_DETACHED_POST, &val, it, &sarg) <= 0)
410 /* Now remove any digests prepended to the BIO */
412 while (sarg.ndef_bio != out)
414 tmpbio = BIO_pop(sarg.ndef_bio);
415 BIO_free(sarg.ndef_bio);
416 sarg.ndef_bio = tmpbio;
423 /* SMIME reader: handle multipart/signed and opaque signing.
424 * in multipart case the content is placed in a memory BIO
425 * pointed to by "bcont". In opaque this is set to NULL
428 ASN1_VALUE *SMIME_read_ASN1(BIO *bio, BIO **bcont, const ASN1_ITEM *it)
431 STACK_OF(MIME_HEADER) *headers = NULL;
432 STACK_OF(BIO) *parts = NULL;
438 if(bcont) *bcont = NULL;
440 if (!(headers = mime_parse_hdr(bio))) {
441 ASN1err(ASN1_F_SMIME_READ_ASN1,ASN1_R_MIME_PARSE_ERROR);
445 if(!(hdr = mime_hdr_find(headers, "content-type")) || !hdr->value) {
446 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
447 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_CONTENT_TYPE);
451 /* Handle multipart/signed */
453 if(!strcmp(hdr->value, "multipart/signed")) {
454 /* Split into two parts */
455 prm = mime_param_find(hdr, "boundary");
456 if(!prm || !prm->param_value) {
457 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
458 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_MULTIPART_BOUNDARY);
461 ret = multi_split(bio, prm->param_value, &parts);
462 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
463 if(!ret || (sk_BIO_num(parts) != 2) ) {
464 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_MULTIPART_BODY_FAILURE);
465 sk_BIO_pop_free(parts, BIO_vfree);
469 /* Parse the signature piece */
470 asnin = sk_BIO_value(parts, 1);
472 if (!(headers = mime_parse_hdr(asnin))) {
473 ASN1err(ASN1_F_SMIME_READ_ASN1,ASN1_R_MIME_SIG_PARSE_ERROR);
474 sk_BIO_pop_free(parts, BIO_vfree);
478 /* Get content type */
480 if(!(hdr = mime_hdr_find(headers, "content-type")) ||
482 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
483 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_SIG_CONTENT_TYPE);
487 if(strcmp(hdr->value, "application/x-pkcs7-signature") &&
488 strcmp(hdr->value, "application/pkcs7-signature")) {
489 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
490 ASN1err(ASN1_F_SMIME_READ_ASN1,ASN1_R_SIG_INVALID_MIME_TYPE);
491 ERR_add_error_data(2, "type: ", hdr->value);
492 sk_BIO_pop_free(parts, BIO_vfree);
495 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
497 if(!(val = b64_read_asn1(asnin, it))) {
498 ASN1err(ASN1_F_SMIME_READ_ASN1,ASN1_R_ASN1_SIG_PARSE_ERROR);
499 sk_BIO_pop_free(parts, BIO_vfree);
504 *bcont = sk_BIO_value(parts, 0);
507 } else sk_BIO_pop_free(parts, BIO_vfree);
511 /* OK, if not multipart/signed try opaque signature */
513 if (strcmp (hdr->value, "application/x-pkcs7-mime") &&
514 strcmp (hdr->value, "application/pkcs7-mime")) {
515 ASN1err(ASN1_F_SMIME_READ_ASN1,ASN1_R_INVALID_MIME_TYPE);
516 ERR_add_error_data(2, "type: ", hdr->value);
517 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
521 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
523 if(!(val = b64_read_asn1(bio, it))) {
524 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_ASN1_PARSE_ERROR);
531 /* Copy text from one BIO to another making the output CRLF at EOL */
532 int SMIME_crlf_copy(BIO *in, BIO *out, int flags)
537 char linebuf[MAX_SMLEN];
538 /* Buffer output so we don't write one line at a time. This is
539 * useful when streaming as we don't end up with one OCTET STRING
542 bf = BIO_new(BIO_f_buffer());
545 out = BIO_push(bf, out);
546 if(flags & SMIME_BINARY)
548 while((len = BIO_read(in, linebuf, MAX_SMLEN)) > 0)
549 BIO_write(out, linebuf, len);
553 if(flags & SMIME_TEXT)
554 BIO_printf(out, "Content-Type: text/plain\r\n\r\n");
555 while ((len = BIO_gets(in, linebuf, MAX_SMLEN)) > 0)
557 eol = strip_eol(linebuf, &len);
559 BIO_write(out, linebuf, len);
560 if(eol) BIO_write(out, "\r\n", 2);
563 (void)BIO_flush(out);
569 /* Strip off headers if they are text/plain */
570 int SMIME_text(BIO *in, BIO *out)
574 STACK_OF(MIME_HEADER) *headers;
577 if (!(headers = mime_parse_hdr(in))) {
578 ASN1err(ASN1_F_SMIME_TEXT,ASN1_R_MIME_PARSE_ERROR);
581 if(!(hdr = mime_hdr_find(headers, "content-type")) || !hdr->value) {
582 ASN1err(ASN1_F_SMIME_TEXT,ASN1_R_MIME_NO_CONTENT_TYPE);
583 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
586 if (strcmp (hdr->value, "text/plain")) {
587 ASN1err(ASN1_F_SMIME_TEXT,ASN1_R_INVALID_MIME_TYPE);
588 ERR_add_error_data(2, "type: ", hdr->value);
589 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
592 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
593 while ((len = BIO_read(in, iobuf, sizeof(iobuf))) > 0)
594 BIO_write(out, iobuf, len);
600 /* Split a multipart/XXX message body into component parts: result is
601 * canonical parts in a STACK of bios
604 static int multi_split(BIO *bio, char *bound, STACK_OF(BIO) **ret)
606 char linebuf[MAX_SMLEN];
608 int eol = 0, next_eol = 0;
610 STACK_OF(BIO) *parts;
611 char state, part, first;
613 blen = strlen(bound);
617 parts = sk_BIO_new_null();
619 while ((len = BIO_gets(bio, linebuf, MAX_SMLEN)) > 0) {
620 state = mime_bound_check(linebuf, len, bound, blen);
624 } else if(state == 2) {
625 sk_BIO_push(parts, bpart);
628 /* Strip CR+LF from linebuf */
629 next_eol = strip_eol(linebuf, &len);
632 if(bpart) sk_BIO_push(parts, bpart);
633 bpart = BIO_new(BIO_s_mem());
634 BIO_set_mem_eof_return(bpart, 0);
636 BIO_write(bpart, "\r\n", 2);
639 BIO_write(bpart, linebuf, len);
645 /* This is the big one: parse MIME header lines up to message body */
647 #define MIME_INVALID 0
653 #define MIME_COMMENT 6
656 static STACK_OF(MIME_HEADER) *mime_parse_hdr(BIO *bio)
660 char linebuf[MAX_SMLEN];
661 MIME_HEADER *mhdr = NULL;
662 STACK_OF(MIME_HEADER) *headers;
663 int len, state, save_state = 0;
665 headers = sk_MIME_HEADER_new(mime_hdr_cmp);
666 while ((len = BIO_gets(bio, linebuf, MAX_SMLEN)) > 0) {
667 /* If whitespace at line start then continuation line */
668 if(mhdr && isspace((unsigned char)linebuf[0])) state = MIME_NAME;
669 else state = MIME_START;
671 /* Go through all characters */
672 for(p = linebuf, q = linebuf; (c = *p) && (c!='\r') && (c!='\n'); p++) {
674 /* State machine to handle MIME headers
675 * if this looks horrible that's because it *is*
683 ntmp = strip_ends(q);
690 mime_debug("Found End Value\n");
692 mhdr = mime_hdr_new(ntmp, strip_ends(q));
693 sk_MIME_HEADER_push(headers, mhdr);
697 } else if(c == '(') {
699 state = MIME_COMMENT;
713 ntmp = strip_ends(q);
722 mime_hdr_addparam(mhdr, ntmp, strip_ends(q));
725 } else if (c == '"') {
726 mime_debug("Found Quote\n");
728 } else if(c == '(') {
730 state = MIME_COMMENT;
736 mime_debug("Found Match Quote\n");
743 if(state == MIME_TYPE) {
744 mhdr = mime_hdr_new(ntmp, strip_ends(q));
745 sk_MIME_HEADER_push(headers, mhdr);
746 } else if(state == MIME_VALUE)
747 mime_hdr_addparam(mhdr, ntmp, strip_ends(q));
748 if(p == linebuf) 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 */
768 if(p[1]) return p + 1;
769 /* Else null string */
772 if(!isspace((unsigned char)c)) return p;
777 /* As above but strip from end of string : maybe should handle brackets? */
778 static char *strip_end(char *name)
781 if(!name) return NULL;
782 /* Look for first non white space or quote */
783 for(p = name + strlen(name) - 1; p >= name ;p--) {
786 if(p - 1 == name) return NULL;
790 if(isspace((unsigned char)c)) *p = 0;
796 static MIME_HEADER *mime_hdr_new(char *name, char *value)
799 char *tmpname, *tmpval, *p;
802 if(!(tmpname = BUF_strdup(name))) return NULL;
803 for(p = tmpname ; *p; p++) {
810 } else tmpname = NULL;
812 if(!(tmpval = BUF_strdup(value))) return NULL;
813 for(p = tmpval ; *p; p++) {
820 } else tmpval = NULL;
821 mhdr = (MIME_HEADER *) OPENSSL_malloc(sizeof(MIME_HEADER));
822 if(!mhdr) return NULL;
823 mhdr->name = tmpname;
824 mhdr->value = tmpval;
825 if(!(mhdr->params = sk_MIME_PARAM_new(mime_param_cmp))) return NULL;
829 static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value)
831 char *tmpname, *tmpval, *p;
835 tmpname = BUF_strdup(name);
836 if(!tmpname) return 0;
837 for(p = tmpname ; *p; p++) {
844 } else tmpname = NULL;
846 tmpval = BUF_strdup(value);
847 if(!tmpval) return 0;
848 } else tmpval = NULL;
849 /* Parameter values are case sensitive so leave as is */
850 mparam = (MIME_PARAM *) OPENSSL_malloc(sizeof(MIME_PARAM));
851 if(!mparam) return 0;
852 mparam->param_name = tmpname;
853 mparam->param_value = tmpval;
854 sk_MIME_PARAM_push(mhdr->params, mparam);
858 static int mime_hdr_cmp(const MIME_HEADER * const *a,
859 const MIME_HEADER * const *b)
861 return(strcmp((*a)->name, (*b)->name));
864 static int mime_param_cmp(const MIME_PARAM * const *a,
865 const MIME_PARAM * const *b)
867 return(strcmp((*a)->param_name, (*b)->param_name));
870 /* Find a header with a given name (if possible) */
872 static MIME_HEADER *mime_hdr_find(STACK_OF(MIME_HEADER) *hdrs, char *name)
877 idx = sk_MIME_HEADER_find(hdrs, &htmp);
878 if(idx < 0) return NULL;
879 return sk_MIME_HEADER_value(hdrs, idx);
882 static MIME_PARAM *mime_param_find(MIME_HEADER *hdr, char *name)
886 param.param_name = name;
887 idx = sk_MIME_PARAM_find(hdr->params, ¶m);
888 if(idx < 0) return NULL;
889 return sk_MIME_PARAM_value(hdr->params, idx);
892 static void mime_hdr_free(MIME_HEADER *hdr)
894 if(hdr->name) OPENSSL_free(hdr->name);
895 if(hdr->value) OPENSSL_free(hdr->value);
896 if(hdr->params) sk_MIME_PARAM_pop_free(hdr->params, mime_param_free);
900 static void mime_param_free(MIME_PARAM *param)
902 if(param->param_name) OPENSSL_free(param->param_name);
903 if(param->param_value) OPENSSL_free(param->param_value);
907 /* Check for a multipart boundary. Returns:
912 static int mime_bound_check(char *line, int linelen, char *bound, int blen)
914 if(linelen == -1) linelen = strlen(line);
915 if(blen == -1) blen = strlen(bound);
916 /* Quickly eliminate if line length too short */
917 if(blen + 2 > linelen) return 0;
918 /* Check for part boundary */
919 if(!strncmp(line, "--", 2) && !strncmp(line + 2, bound, blen)) {
920 if(!strncmp(line + blen + 2, "--", 2)) return 2;
926 static int strip_eol(char *linebuf, int *plen)
931 p = linebuf + len - 1;
932 for (p = linebuf + len - 1; len > 0; len--, p--)