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 * ====================================================================
58 #include "internal/cryptlib.h"
59 #include <openssl/rand.h>
60 #include <openssl/x509.h>
61 #include <openssl/asn1.h>
62 #include <openssl/asn1t.h>
63 #include "internal/evp_int.h"
64 #include "asn1_locl.h"
67 * Generalised MIME like utilities for streaming ASN1. Although many have a
68 * PKCS7/CMS like flavour others are more general purpose.
72 * MIME format structures Note that all are translated to lower case apart
73 * from parameter values. Quotes are stripped off
77 char *param_name; /* Param name e.g. "micalg" */
78 char *param_value; /* Param value e.g. "sha1" */
81 DECLARE_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)
91 static int asn1_output_data(BIO *out, BIO *data, ASN1_VALUE *val, int flags,
93 static char *strip_ends(char *name);
94 static char *strip_start(char *name);
95 static char *strip_end(char *name);
96 static MIME_HEADER *mime_hdr_new(char *name, char *value);
97 static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value);
98 static STACK_OF(MIME_HEADER) *mime_parse_hdr(BIO *bio);
99 static int mime_hdr_cmp(const MIME_HEADER *const *a,
100 const MIME_HEADER *const *b);
101 static int mime_param_cmp(const MIME_PARAM *const *a,
102 const MIME_PARAM *const *b);
103 static void mime_param_free(MIME_PARAM *param);
104 static int mime_bound_check(char *line, int linelen, char *bound, int blen);
105 static int multi_split(BIO *bio, char *bound, STACK_OF(BIO) **ret);
106 static int strip_eol(char *linebuf, int *plen, int flags);
107 static MIME_HEADER *mime_hdr_find(STACK_OF(MIME_HEADER) *hdrs, char *name);
108 static MIME_PARAM *mime_param_find(MIME_HEADER *hdr, char *name);
109 static void mime_hdr_free(MIME_HEADER *hdr);
111 #define MAX_SMLEN 1024
112 #define mime_debug(x) /* x */
114 /* Output an ASN1 structure in BER format streaming if necessary */
116 int i2d_ASN1_bio_stream(BIO *out, ASN1_VALUE *val, BIO *in, int flags,
119 /* If streaming create stream BIO and copy all content through it */
120 if (flags & SMIME_STREAM) {
122 bio = BIO_new_NDEF(out, val, it);
124 ASN1err(ASN1_F_I2D_ASN1_BIO_STREAM, ERR_R_MALLOC_FAILURE);
127 SMIME_crlf_copy(in, bio, flags);
128 (void)BIO_flush(bio);
129 /* Free up successive BIOs until we hit the old output BIO */
134 } while (bio != out);
137 * else just write out ASN1 structure which will have all content stored
141 ASN1_item_i2d_bio(it, out, val);
145 /* Base 64 read and write of ASN1 structure */
147 static int B64_write_ASN1(BIO *out, ASN1_VALUE *val, BIO *in, int flags,
152 b64 = BIO_new(BIO_f_base64());
154 ASN1err(ASN1_F_B64_WRITE_ASN1, ERR_R_MALLOC_FAILURE);
158 * prepend the b64 BIO so all data is base64 encoded.
160 out = BIO_push(b64, out);
161 r = i2d_ASN1_bio_stream(out, val, in, flags, it);
162 (void)BIO_flush(out);
168 /* Streaming ASN1 PEM write */
170 int PEM_write_bio_ASN1_stream(BIO *out, ASN1_VALUE *val, BIO *in, int flags,
171 const char *hdr, const ASN1_ITEM *it)
174 BIO_printf(out, "-----BEGIN %s-----\n", hdr);
175 r = B64_write_ASN1(out, val, in, flags, it);
176 BIO_printf(out, "-----END %s-----\n", hdr);
180 static ASN1_VALUE *b64_read_asn1(BIO *bio, const ASN1_ITEM *it)
185 if ((b64 = BIO_new(BIO_f_base64())) == NULL) {
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");
254 BIO_puts(out, "unknown");
271 int SMIME_write_ASN1(BIO *bio, ASN1_VALUE *val, BIO *data, int flags,
272 int ctype_nid, int econt_nid,
273 STACK_OF(X509_ALGOR) *mdalgs, const ASN1_ITEM *it)
277 const char *mime_prefix, *mime_eol, *cname = "smime.p7m";
278 const char *msg_type = NULL;
279 if (flags & SMIME_OLDMIME)
280 mime_prefix = "application/x-pkcs7-";
282 mime_prefix = "application/pkcs7-";
284 if (flags & SMIME_CRLFEOL)
288 if ((flags & SMIME_DETACHED) && data) {
289 /* We want multipart/signed */
290 /* Generate a random boundary */
291 if (RAND_bytes((unsigned char *)bound, 32) <= 0)
293 for (i = 0; i < 32; i++) {
302 BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol);
303 BIO_printf(bio, "Content-Type: multipart/signed;");
304 BIO_printf(bio, " protocol=\"%ssignature\";", mime_prefix);
305 BIO_puts(bio, " micalg=\"");
306 asn1_write_micalg(bio, mdalgs);
307 BIO_printf(bio, "\"; boundary=\"----%s\"%s%s",
308 bound, mime_eol, mime_eol);
309 BIO_printf(bio, "This is an S/MIME signed message%s%s",
311 /* Now write out the first part */
312 BIO_printf(bio, "------%s%s", bound, mime_eol);
313 if (!asn1_output_data(bio, data, val, flags, it))
315 BIO_printf(bio, "%s------%s%s", mime_eol, bound, mime_eol);
317 /* Headers for signature */
319 BIO_printf(bio, "Content-Type: %ssignature;", mime_prefix);
320 BIO_printf(bio, " name=\"smime.p7s\"%s", mime_eol);
321 BIO_printf(bio, "Content-Transfer-Encoding: base64%s", mime_eol);
322 BIO_printf(bio, "Content-Disposition: attachment;");
323 BIO_printf(bio, " filename=\"smime.p7s\"%s%s", mime_eol, mime_eol);
324 B64_write_ASN1(bio, val, NULL, 0, it);
325 BIO_printf(bio, "%s------%s--%s%s", mime_eol, bound,
330 /* Determine smime-type header */
332 if (ctype_nid == NID_pkcs7_enveloped)
333 msg_type = "enveloped-data";
334 else if (ctype_nid == NID_pkcs7_signed) {
335 if (econt_nid == NID_id_smime_ct_receipt)
336 msg_type = "signed-receipt";
337 else if (sk_X509_ALGOR_num(mdalgs) >= 0)
338 msg_type = "signed-data";
340 msg_type = "certs-only";
341 } else if (ctype_nid == NID_id_smime_ct_compressedData) {
342 msg_type = "compressed-data";
346 BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol);
347 BIO_printf(bio, "Content-Disposition: attachment;");
348 BIO_printf(bio, " filename=\"%s\"%s", cname, mime_eol);
349 BIO_printf(bio, "Content-Type: %smime;", mime_prefix);
351 BIO_printf(bio, " smime-type=%s;", msg_type);
352 BIO_printf(bio, " name=\"%s\"%s", cname, mime_eol);
353 BIO_printf(bio, "Content-Transfer-Encoding: base64%s%s",
355 if (!B64_write_ASN1(bio, val, data, flags, it))
357 BIO_printf(bio, "%s", mime_eol);
361 /* Handle output of ASN1 data */
363 static int asn1_output_data(BIO *out, BIO *data, ASN1_VALUE *val, int flags,
367 const ASN1_AUX *aux = it->funcs;
368 ASN1_STREAM_ARG sarg;
372 * If data is not deteched or resigning then the output BIO is already
373 * set up to finalise when it is written through.
375 if (!(flags & SMIME_DETACHED) || (flags & PKCS7_REUSE_DIGEST)) {
376 SMIME_crlf_copy(data, out, flags);
380 if (!aux || !aux->asn1_cb) {
381 ASN1err(ASN1_F_ASN1_OUTPUT_DATA, ASN1_R_STREAMING_NOT_SUPPORTED);
386 sarg.ndef_bio = NULL;
387 sarg.boundary = NULL;
389 /* Let ASN1 code prepend any needed BIOs */
391 if (aux->asn1_cb(ASN1_OP_DETACHED_PRE, &val, it, &sarg) <= 0)
394 /* Copy data across, passing through filter BIOs for processing */
395 SMIME_crlf_copy(data, sarg.ndef_bio, flags);
397 /* Finalize structure */
398 if (aux->asn1_cb(ASN1_OP_DETACHED_POST, &val, it, &sarg) <= 0)
401 /* Now remove any digests prepended to the BIO */
403 while (sarg.ndef_bio != out) {
404 tmpbio = BIO_pop(sarg.ndef_bio);
405 BIO_free(sarg.ndef_bio);
406 sarg.ndef_bio = tmpbio;
414 * SMIME reader: handle multipart/signed and opaque signing. in multipart
415 * case the content is placed in a memory BIO pointed to by "bcont". In
416 * opaque this is set to NULL
419 ASN1_VALUE *SMIME_read_ASN1(BIO *bio, BIO **bcont, const ASN1_ITEM *it)
422 STACK_OF(MIME_HEADER) *headers = NULL;
423 STACK_OF(BIO) *parts = NULL;
432 if ((headers = mime_parse_hdr(bio)) == NULL) {
433 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_MIME_PARSE_ERROR);
437 if ((hdr = mime_hdr_find(headers, "content-type")) == NULL
438 || hdr->value == NULL) {
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") == 0) {
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)) == NULL) {
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")) == NULL
474 || hdr->value == NULL) {
475 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
476 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_SIG_CONTENT_TYPE);
480 if (strcmp(hdr->value, "application/x-pkcs7-signature") &&
481 strcmp(hdr->value, "application/pkcs7-signature")) {
482 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_SIG_INVALID_MIME_TYPE);
483 ERR_add_error_data(2, "type: ", hdr->value);
484 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
485 sk_BIO_pop_free(parts, BIO_vfree);
488 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
490 if ((val = b64_read_asn1(asnin, it)) == NULL) {
491 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_ASN1_SIG_PARSE_ERROR);
492 sk_BIO_pop_free(parts, BIO_vfree);
497 *bcont = sk_BIO_value(parts, 0);
501 sk_BIO_pop_free(parts, BIO_vfree);
505 /* OK, if not multipart/signed try opaque signature */
507 if (strcmp(hdr->value, "application/x-pkcs7-mime") &&
508 strcmp(hdr->value, "application/pkcs7-mime")) {
509 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_INVALID_MIME_TYPE);
510 ERR_add_error_data(2, "type: ", hdr->value);
511 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
515 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
517 if ((val = b64_read_asn1(bio, it)) == NULL) {
518 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_ASN1_PARSE_ERROR);
525 /* Copy text from one BIO to another making the output CRLF at EOL */
526 int SMIME_crlf_copy(BIO *in, BIO *out, int flags)
531 char linebuf[MAX_SMLEN];
533 * Buffer output so we don't write one line at a time. This is useful
534 * when streaming as we don't end up with one OCTET STRING per line.
536 bf = BIO_new(BIO_f_buffer());
539 out = BIO_push(bf, out);
540 if (flags & SMIME_BINARY) {
541 while ((len = BIO_read(in, linebuf, MAX_SMLEN)) > 0)
542 BIO_write(out, linebuf, len);
545 if (flags & SMIME_TEXT)
546 BIO_printf(out, "Content-Type: text/plain\r\n\r\n");
547 while ((len = BIO_gets(in, linebuf, MAX_SMLEN)) > 0) {
548 eol = strip_eol(linebuf, &len, flags);
550 /* Not EOF: write out all CRLF */
551 if (flags & SMIME_ASCIICRLF) {
553 for (i = 0; i < eolcnt; i++)
554 BIO_write(out, "\r\n", 2);
557 BIO_write(out, linebuf, len);
559 BIO_write(out, "\r\n", 2);
560 } else if (flags & SMIME_ASCIICRLF)
563 BIO_write(out, "\r\n", 2);
566 (void)BIO_flush(out);
572 /* Strip off headers if they are text/plain */
573 int SMIME_text(BIO *in, BIO *out)
577 STACK_OF(MIME_HEADER) *headers;
580 if ((headers = mime_parse_hdr(in)) == NULL) {
581 ASN1err(ASN1_F_SMIME_TEXT, ASN1_R_MIME_PARSE_ERROR);
584 if ((hdr = mime_hdr_find(headers, "content-type")) == NULL
585 || hdr->value == NULL) {
586 ASN1err(ASN1_F_SMIME_TEXT, ASN1_R_MIME_NO_CONTENT_TYPE);
587 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
590 if (strcmp(hdr->value, "text/plain")) {
591 ASN1err(ASN1_F_SMIME_TEXT, ASN1_R_INVALID_MIME_TYPE);
592 ERR_add_error_data(2, "type: ", hdr->value);
593 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
596 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
597 while ((len = BIO_read(in, iobuf, sizeof(iobuf))) > 0)
598 BIO_write(out, iobuf, len);
605 * Split a multipart/XXX message body into component parts: result is
606 * canonical parts in a STACK of bios
609 static int multi_split(BIO *bio, char *bound, STACK_OF(BIO) **ret)
611 char linebuf[MAX_SMLEN];
613 int eol = 0, next_eol = 0;
615 STACK_OF(BIO) *parts;
616 char state, part, first;
618 blen = strlen(bound);
622 parts = sk_BIO_new_null();
626 while ((len = BIO_gets(bio, linebuf, MAX_SMLEN)) > 0) {
627 state = mime_bound_check(linebuf, len, bound, blen);
631 } else if (state == 2) {
632 if (!sk_BIO_push(parts, bpart)) {
638 /* Strip CR+LF from linebuf */
639 next_eol = strip_eol(linebuf, &len, 0);
643 if (!sk_BIO_push(parts, bpart)) {
647 bpart = BIO_new(BIO_s_mem());
650 BIO_set_mem_eof_return(bpart, 0);
652 BIO_write(bpart, "\r\n", 2);
655 BIO_write(bpart, linebuf, len);
662 /* This is the big one: parse MIME header lines up to message body */
664 #define MIME_INVALID 0
670 #define MIME_COMMENT 6
672 static STACK_OF(MIME_HEADER) *mime_parse_hdr(BIO *bio)
676 char linebuf[MAX_SMLEN];
677 MIME_HEADER *mhdr = NULL;
678 STACK_OF(MIME_HEADER) *headers;
679 int len, state, save_state = 0;
681 headers = sk_MIME_HEADER_new(mime_hdr_cmp);
684 while ((len = BIO_gets(bio, linebuf, MAX_SMLEN)) > 0) {
685 /* If whitespace at line start then continuation line */
686 if (mhdr && isspace((unsigned char)linebuf[0]))
691 /* Go through all characters */
692 for (p = linebuf, q = linebuf; (c = *p) && (c != '\r') && (c != '\n');
696 * State machine to handle MIME headers if this looks horrible
697 * that's because it *is*
705 ntmp = strip_ends(q);
712 mime_debug("Found End Value\n");
714 mhdr = mime_hdr_new(ntmp, strip_ends(q));
715 sk_MIME_HEADER_push(headers, mhdr);
719 } else if (c == '(') {
721 state = MIME_COMMENT;
735 ntmp = strip_ends(q);
744 mime_hdr_addparam(mhdr, ntmp, strip_ends(q));
747 } else if (c == '"') {
748 mime_debug("Found Quote\n");
750 } else if (c == '(') {
752 state = MIME_COMMENT;
758 mime_debug("Found Match Quote\n");
765 if (state == MIME_TYPE) {
766 mhdr = mime_hdr_new(ntmp, strip_ends(q));
767 sk_MIME_HEADER_push(headers, mhdr);
768 } else if (state == MIME_VALUE)
769 mime_hdr_addparam(mhdr, ntmp, strip_ends(q));
771 break; /* Blank line means end of headers */
778 static char *strip_ends(char *name)
780 return strip_end(strip_start(name));
783 /* Strip a parameter of whitespace from start of param */
784 static char *strip_start(char *name)
787 /* Look for first non white space or quote */
788 for (p = name; (c = *p); p++) {
790 /* Next char is start of string if non null */
793 /* Else null string */
796 if (!isspace((unsigned char)c))
802 /* As above but strip from end of string : maybe should handle brackets? */
803 static char *strip_end(char *name)
808 /* Look for first non white space or quote */
809 for (p = name + strlen(name) - 1; p >= name; p--) {
817 if (isspace((unsigned char)c))
825 static MIME_HEADER *mime_hdr_new(char *name, char *value)
827 MIME_HEADER *mhdr = NULL;
828 char *tmpname = NULL, *tmpval = NULL, *p;
832 if ((tmpname = BUF_strdup(name)) == NULL)
834 for (p = tmpname; *p; p++) {
835 c = (unsigned char)*p;
843 if ((tmpval = BUF_strdup(value)) == NULL)
845 for (p = tmpval; *p; p++) {
846 c = (unsigned char)*p;
853 mhdr = OPENSSL_malloc(sizeof(*mhdr));
856 mhdr->name = tmpname;
857 mhdr->value = tmpval;
858 if ((mhdr->params = sk_MIME_PARAM_new(mime_param_cmp)) == NULL)
863 OPENSSL_free(tmpname);
864 OPENSSL_free(tmpval);
869 static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value)
871 char *tmpname = NULL, *tmpval = NULL, *p;
873 MIME_PARAM *mparam = NULL;
875 tmpname = BUF_strdup(name);
878 for (p = tmpname; *p; p++) {
879 c = (unsigned char)*p;
887 tmpval = BUF_strdup(value);
891 /* Parameter values are case sensitive so leave as is */
892 mparam = OPENSSL_malloc(sizeof(*mparam));
895 mparam->param_name = tmpname;
896 mparam->param_value = tmpval;
897 if (!sk_MIME_PARAM_push(mhdr->params, mparam))
901 OPENSSL_free(tmpname);
902 OPENSSL_free(tmpval);
903 OPENSSL_free(mparam);
907 static int mime_hdr_cmp(const MIME_HEADER *const *a,
908 const MIME_HEADER *const *b)
910 if (!(*a)->name || !(*b)->name)
911 return ! !(*a)->name - ! !(*b)->name;
913 return (strcmp((*a)->name, (*b)->name));
916 static int mime_param_cmp(const MIME_PARAM *const *a,
917 const MIME_PARAM *const *b)
919 if (!(*a)->param_name || !(*b)->param_name)
920 return ! !(*a)->param_name - ! !(*b)->param_name;
921 return (strcmp((*a)->param_name, (*b)->param_name));
924 /* Find a header with a given name (if possible) */
926 static MIME_HEADER *mime_hdr_find(STACK_OF(MIME_HEADER) *hdrs, char *name)
931 idx = sk_MIME_HEADER_find(hdrs, &htmp);
934 return sk_MIME_HEADER_value(hdrs, idx);
937 static MIME_PARAM *mime_param_find(MIME_HEADER *hdr, char *name)
941 param.param_name = name;
942 idx = sk_MIME_PARAM_find(hdr->params, ¶m);
945 return sk_MIME_PARAM_value(hdr->params, idx);
948 static void mime_hdr_free(MIME_HEADER *hdr)
950 OPENSSL_free(hdr->name);
951 OPENSSL_free(hdr->value);
953 sk_MIME_PARAM_pop_free(hdr->params, mime_param_free);
957 static void mime_param_free(MIME_PARAM *param)
959 OPENSSL_free(param->param_name);
960 OPENSSL_free(param->param_value);
965 * Check for a multipart boundary. Returns:
970 static int mime_bound_check(char *line, int linelen, char *bound, int blen)
973 linelen = strlen(line);
975 blen = strlen(bound);
976 /* Quickly eliminate if line length too short */
977 if (blen + 2 > linelen)
979 /* Check for part boundary */
980 if ((strncmp(line, "--", 2) == 0)
981 && strncmp(line + 2, bound, blen) == 0) {
982 if (strncmp(line + blen + 2, "--", 2) == 0)
990 static int strip_eol(char *linebuf, int *plen, int flags)
995 p = linebuf + len - 1;
996 for (p = linebuf + len - 1; len > 0; len--, p--) {
1000 else if (is_eol && flags & SMIME_ASCIICRLF && c < 33)