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 * ====================================================================
57 #include "internal/cryptlib.h"
58 #include <openssl/rand.h>
59 #include <openssl/x509.h>
60 #include <openssl/asn1.h>
61 #include <openssl/asn1t.h>
62 #include "internal/evp_int.h"
63 #include "internal/bio.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
76 struct mime_param_st {
77 char *param_name; /* Param name e.g. "micalg" */
78 char *param_value; /* Param value e.g. "sha1" */
81 struct mime_header_st {
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 static int asn1_output_data(BIO *out, BIO *data, ASN1_VALUE *val, int flags,
89 static char *strip_ends(char *name);
90 static char *strip_start(char *name);
91 static char *strip_end(char *name);
92 static MIME_HEADER *mime_hdr_new(char *name, char *value);
93 static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value);
94 static STACK_OF(MIME_HEADER) *mime_parse_hdr(BIO *bio);
95 static int mime_hdr_cmp(const MIME_HEADER *const *a,
96 const MIME_HEADER *const *b);
97 static int mime_param_cmp(const MIME_PARAM *const *a,
98 const MIME_PARAM *const *b);
99 static void mime_param_free(MIME_PARAM *param);
100 static int mime_bound_check(char *line, int linelen, char *bound, int blen);
101 static int multi_split(BIO *bio, char *bound, STACK_OF(BIO) **ret);
102 static int strip_eol(char *linebuf, int *plen, int flags);
103 static MIME_HEADER *mime_hdr_find(STACK_OF(MIME_HEADER) *hdrs, char *name);
104 static MIME_PARAM *mime_param_find(MIME_HEADER *hdr, char *name);
105 static void mime_hdr_free(MIME_HEADER *hdr);
107 #define MAX_SMLEN 1024
108 #define mime_debug(x) /* x */
110 /* Output an ASN1 structure in BER format streaming if necessary */
112 int i2d_ASN1_bio_stream(BIO *out, ASN1_VALUE *val, BIO *in, int flags,
115 /* If streaming create stream BIO and copy all content through it */
116 if (flags & SMIME_STREAM) {
118 bio = BIO_new_NDEF(out, val, it);
120 ASN1err(ASN1_F_I2D_ASN1_BIO_STREAM, ERR_R_MALLOC_FAILURE);
123 SMIME_crlf_copy(in, bio, flags);
124 (void)BIO_flush(bio);
125 /* Free up successive BIOs until we hit the old output BIO */
130 } while (bio != out);
133 * else just write out ASN1 structure which will have all content stored
137 ASN1_item_i2d_bio(it, out, val);
141 /* Base 64 read and write of ASN1 structure */
143 static int B64_write_ASN1(BIO *out, ASN1_VALUE *val, BIO *in, int flags,
148 b64 = BIO_new(BIO_f_base64());
150 ASN1err(ASN1_F_B64_WRITE_ASN1, ERR_R_MALLOC_FAILURE);
154 * prepend the b64 BIO so all data is base64 encoded.
156 out = BIO_push(b64, out);
157 r = i2d_ASN1_bio_stream(out, val, in, flags, it);
158 (void)BIO_flush(out);
164 /* Streaming ASN1 PEM write */
166 int PEM_write_bio_ASN1_stream(BIO *out, ASN1_VALUE *val, BIO *in, int flags,
167 const char *hdr, const ASN1_ITEM *it)
170 BIO_printf(out, "-----BEGIN %s-----\n", hdr);
171 r = B64_write_ASN1(out, val, in, flags, it);
172 BIO_printf(out, "-----END %s-----\n", hdr);
176 static ASN1_VALUE *b64_read_asn1(BIO *bio, const ASN1_ITEM *it)
181 if ((b64 = BIO_new(BIO_f_base64())) == NULL) {
182 ASN1err(ASN1_F_B64_READ_ASN1, ERR_R_MALLOC_FAILURE);
185 bio = BIO_push(b64, bio);
186 val = ASN1_item_d2i_bio(it, bio, NULL);
188 ASN1err(ASN1_F_B64_READ_ASN1, ASN1_R_DECODE_ERROR);
189 (void)BIO_flush(bio);
195 /* Generate the MIME "micalg" parameter from RFC3851, RFC4490 */
197 static int asn1_write_micalg(BIO *out, STACK_OF(X509_ALGOR) *mdalgs)
200 int i, have_unknown = 0, write_comma, ret = 0, md_nid;
203 for (i = 0; i < sk_X509_ALGOR_num(mdalgs); i++) {
205 BIO_write(out, ",", 1);
207 md_nid = OBJ_obj2nid(sk_X509_ALGOR_value(mdalgs, i)->algorithm);
208 md = EVP_get_digestbynid(md_nid);
209 if (md && md->md_ctrl) {
212 rv = md->md_ctrl(NULL, EVP_MD_CTRL_MICALG, 0, &micstr);
214 BIO_puts(out, micstr);
215 OPENSSL_free(micstr);
223 BIO_puts(out, "sha1");
227 BIO_puts(out, "md5");
231 BIO_puts(out, "sha-256");
235 BIO_puts(out, "sha-384");
239 BIO_puts(out, "sha-512");
242 case NID_id_GostR3411_94:
243 BIO_puts(out, "gostr3411-94");
250 BIO_puts(out, "unknown");
267 int SMIME_write_ASN1(BIO *bio, ASN1_VALUE *val, BIO *data, int flags,
268 int ctype_nid, int econt_nid,
269 STACK_OF(X509_ALGOR) *mdalgs, const ASN1_ITEM *it)
273 const char *mime_prefix, *mime_eol, *cname = "smime.p7m";
274 const char *msg_type = NULL;
275 if (flags & SMIME_OLDMIME)
276 mime_prefix = "application/x-pkcs7-";
278 mime_prefix = "application/pkcs7-";
280 if (flags & SMIME_CRLFEOL)
284 if ((flags & SMIME_DETACHED) && data) {
285 /* We want multipart/signed */
286 /* Generate a random boundary */
287 if (RAND_bytes((unsigned char *)bound, 32) <= 0)
289 for (i = 0; i < 32; i++) {
298 BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol);
299 BIO_printf(bio, "Content-Type: multipart/signed;");
300 BIO_printf(bio, " protocol=\"%ssignature\";", mime_prefix);
301 BIO_puts(bio, " micalg=\"");
302 asn1_write_micalg(bio, mdalgs);
303 BIO_printf(bio, "\"; boundary=\"----%s\"%s%s",
304 bound, mime_eol, mime_eol);
305 BIO_printf(bio, "This is an S/MIME signed message%s%s",
307 /* Now write out the first part */
308 BIO_printf(bio, "------%s%s", bound, mime_eol);
309 if (!asn1_output_data(bio, data, val, flags, it))
311 BIO_printf(bio, "%s------%s%s", mime_eol, bound, mime_eol);
313 /* Headers for signature */
315 BIO_printf(bio, "Content-Type: %ssignature;", mime_prefix);
316 BIO_printf(bio, " name=\"smime.p7s\"%s", mime_eol);
317 BIO_printf(bio, "Content-Transfer-Encoding: base64%s", mime_eol);
318 BIO_printf(bio, "Content-Disposition: attachment;");
319 BIO_printf(bio, " filename=\"smime.p7s\"%s%s", mime_eol, mime_eol);
320 B64_write_ASN1(bio, val, NULL, 0, it);
321 BIO_printf(bio, "%s------%s--%s%s", mime_eol, bound,
326 /* Determine smime-type header */
328 if (ctype_nid == NID_pkcs7_enveloped)
329 msg_type = "enveloped-data";
330 else if (ctype_nid == NID_pkcs7_signed) {
331 if (econt_nid == NID_id_smime_ct_receipt)
332 msg_type = "signed-receipt";
333 else if (sk_X509_ALGOR_num(mdalgs) >= 0)
334 msg_type = "signed-data";
336 msg_type = "certs-only";
337 } else if (ctype_nid == NID_id_smime_ct_compressedData) {
338 msg_type = "compressed-data";
342 BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol);
343 BIO_printf(bio, "Content-Disposition: attachment;");
344 BIO_printf(bio, " filename=\"%s\"%s", cname, mime_eol);
345 BIO_printf(bio, "Content-Type: %smime;", mime_prefix);
347 BIO_printf(bio, " smime-type=%s;", msg_type);
348 BIO_printf(bio, " name=\"%s\"%s", cname, mime_eol);
349 BIO_printf(bio, "Content-Transfer-Encoding: base64%s%s",
351 if (!B64_write_ASN1(bio, val, data, flags, it))
353 BIO_printf(bio, "%s", mime_eol);
357 /* Handle output of ASN1 data */
359 static int asn1_output_data(BIO *out, BIO *data, ASN1_VALUE *val, int flags,
363 const ASN1_AUX *aux = it->funcs;
364 ASN1_STREAM_ARG sarg;
368 * If data is not detached or resigning then the output BIO is already
369 * set up to finalise when it is written through.
371 if (!(flags & SMIME_DETACHED) || (flags & PKCS7_REUSE_DIGEST)) {
372 SMIME_crlf_copy(data, out, flags);
376 if (!aux || !aux->asn1_cb) {
377 ASN1err(ASN1_F_ASN1_OUTPUT_DATA, ASN1_R_STREAMING_NOT_SUPPORTED);
382 sarg.ndef_bio = NULL;
383 sarg.boundary = NULL;
385 /* Let ASN1 code prepend any needed BIOs */
387 if (aux->asn1_cb(ASN1_OP_DETACHED_PRE, &val, it, &sarg) <= 0)
390 /* Copy data across, passing through filter BIOs for processing */
391 SMIME_crlf_copy(data, sarg.ndef_bio, flags);
393 /* Finalize structure */
394 if (aux->asn1_cb(ASN1_OP_DETACHED_POST, &val, it, &sarg) <= 0)
397 /* Now remove any digests prepended to the BIO */
399 while (sarg.ndef_bio != out) {
400 tmpbio = BIO_pop(sarg.ndef_bio);
401 BIO_free(sarg.ndef_bio);
402 sarg.ndef_bio = tmpbio;
410 * SMIME reader: handle multipart/signed and opaque signing. in multipart
411 * case the content is placed in a memory BIO pointed to by "bcont". In
412 * opaque this is set to NULL
415 ASN1_VALUE *SMIME_read_ASN1(BIO *bio, BIO **bcont, const ASN1_ITEM *it)
418 STACK_OF(MIME_HEADER) *headers = NULL;
419 STACK_OF(BIO) *parts = NULL;
428 if ((headers = mime_parse_hdr(bio)) == NULL) {
429 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_MIME_PARSE_ERROR);
433 if ((hdr = mime_hdr_find(headers, "content-type")) == NULL
434 || hdr->value == NULL) {
435 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
436 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_CONTENT_TYPE);
440 /* Handle multipart/signed */
442 if (strcmp(hdr->value, "multipart/signed") == 0) {
443 /* Split into two parts */
444 prm = mime_param_find(hdr, "boundary");
445 if (!prm || !prm->param_value) {
446 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
447 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_MULTIPART_BOUNDARY);
450 ret = multi_split(bio, prm->param_value, &parts);
451 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
452 if (!ret || (sk_BIO_num(parts) != 2)) {
453 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_MULTIPART_BODY_FAILURE);
454 sk_BIO_pop_free(parts, BIO_vfree);
458 /* Parse the signature piece */
459 asnin = sk_BIO_value(parts, 1);
461 if ((headers = mime_parse_hdr(asnin)) == NULL) {
462 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_MIME_SIG_PARSE_ERROR);
463 sk_BIO_pop_free(parts, BIO_vfree);
467 /* Get content type */
469 if ((hdr = mime_hdr_find(headers, "content-type")) == NULL
470 || hdr->value == NULL) {
471 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
472 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_NO_SIG_CONTENT_TYPE);
476 if (strcmp(hdr->value, "application/x-pkcs7-signature") &&
477 strcmp(hdr->value, "application/pkcs7-signature")) {
478 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_SIG_INVALID_MIME_TYPE);
479 ERR_add_error_data(2, "type: ", hdr->value);
480 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
481 sk_BIO_pop_free(parts, BIO_vfree);
484 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
486 if ((val = b64_read_asn1(asnin, it)) == NULL) {
487 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_ASN1_SIG_PARSE_ERROR);
488 sk_BIO_pop_free(parts, BIO_vfree);
493 *bcont = sk_BIO_value(parts, 0);
497 sk_BIO_pop_free(parts, BIO_vfree);
501 /* OK, if not multipart/signed try opaque signature */
503 if (strcmp(hdr->value, "application/x-pkcs7-mime") &&
504 strcmp(hdr->value, "application/pkcs7-mime")) {
505 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_INVALID_MIME_TYPE);
506 ERR_add_error_data(2, "type: ", hdr->value);
507 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
511 sk_MIME_HEADER_pop_free(headers, mime_hdr_free);
513 if ((val = b64_read_asn1(bio, it)) == NULL) {
514 ASN1err(ASN1_F_SMIME_READ_ASN1, ASN1_R_ASN1_PARSE_ERROR);
521 /* Copy text from one BIO to another making the output CRLF at EOL */
522 int SMIME_crlf_copy(BIO *in, BIO *out, int flags)
527 char linebuf[MAX_SMLEN];
529 * Buffer output so we don't write one line at a time. This is useful
530 * when streaming as we don't end up with one OCTET STRING per line.
532 bf = BIO_new(BIO_f_buffer());
535 out = BIO_push(bf, out);
536 if (flags & SMIME_BINARY) {
537 while ((len = BIO_read(in, linebuf, MAX_SMLEN)) > 0)
538 BIO_write(out, linebuf, len);
541 if (flags & SMIME_TEXT)
542 BIO_printf(out, "Content-Type: text/plain\r\n\r\n");
543 while ((len = BIO_gets(in, linebuf, MAX_SMLEN)) > 0) {
544 eol = strip_eol(linebuf, &len, flags);
546 /* Not EOF: write out all CRLF */
547 if (flags & SMIME_ASCIICRLF) {
549 for (i = 0; i < eolcnt; i++)
550 BIO_write(out, "\r\n", 2);
553 BIO_write(out, linebuf, len);
555 BIO_write(out, "\r\n", 2);
556 } else if (flags & SMIME_ASCIICRLF)
559 BIO_write(out, "\r\n", 2);
562 (void)BIO_flush(out);
568 /* Strip off headers if they are text/plain */
569 int SMIME_text(BIO *in, BIO *out)
573 STACK_OF(MIME_HEADER) *headers;
576 if ((headers = mime_parse_hdr(in)) == NULL) {
577 ASN1err(ASN1_F_SMIME_TEXT, ASN1_R_MIME_PARSE_ERROR);
580 if ((hdr = mime_hdr_find(headers, "content-type")) == NULL
581 || hdr->value == NULL) {
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);
601 * Split a multipart/XXX message body into component parts: result is
602 * canonical parts in a STACK of bios
605 static int multi_split(BIO *bio, char *bound, STACK_OF(BIO) **ret)
607 char linebuf[MAX_SMLEN];
609 int eol = 0, next_eol = 0;
611 STACK_OF(BIO) *parts;
612 char state, part, first;
614 blen = strlen(bound);
618 parts = sk_BIO_new_null();
622 while ((len = BIO_gets(bio, linebuf, MAX_SMLEN)) > 0) {
623 state = mime_bound_check(linebuf, len, bound, blen);
627 } else if (state == 2) {
628 if (!sk_BIO_push(parts, bpart)) {
634 /* Strip CR+LF from linebuf */
635 next_eol = strip_eol(linebuf, &len, 0);
639 if (!sk_BIO_push(parts, bpart)) {
643 bpart = BIO_new(BIO_s_mem());
646 BIO_set_mem_eof_return(bpart, 0);
648 BIO_write(bpart, "\r\n", 2);
651 BIO_write(bpart, linebuf, len);
658 /* This is the big one: parse MIME header lines up to message body */
660 #define MIME_INVALID 0
666 #define MIME_COMMENT 6
668 static STACK_OF(MIME_HEADER) *mime_parse_hdr(BIO *bio)
672 char linebuf[MAX_SMLEN];
673 MIME_HEADER *mhdr = NULL;
674 STACK_OF(MIME_HEADER) *headers;
675 int len, state, save_state = 0;
677 headers = sk_MIME_HEADER_new(mime_hdr_cmp);
680 while ((len = BIO_gets(bio, linebuf, MAX_SMLEN)) > 0) {
681 /* If whitespace at line start then continuation line */
682 if (mhdr && isspace((unsigned char)linebuf[0]))
687 /* Go through all characters */
688 for (p = linebuf, q = linebuf; (c = *p) && (c != '\r') && (c != '\n');
692 * State machine to handle MIME headers if this looks horrible
693 * that's because it *is*
701 ntmp = strip_ends(q);
708 mime_debug("Found End Value\n");
710 mhdr = mime_hdr_new(ntmp, strip_ends(q));
711 sk_MIME_HEADER_push(headers, mhdr);
715 } else if (c == '(') {
717 state = MIME_COMMENT;
731 ntmp = strip_ends(q);
740 mime_hdr_addparam(mhdr, ntmp, strip_ends(q));
743 } else if (c == '"') {
744 mime_debug("Found Quote\n");
746 } else if (c == '(') {
748 state = MIME_COMMENT;
754 mime_debug("Found Match Quote\n");
761 if (state == MIME_TYPE) {
762 mhdr = mime_hdr_new(ntmp, strip_ends(q));
763 sk_MIME_HEADER_push(headers, mhdr);
764 } else if (state == MIME_VALUE)
765 mime_hdr_addparam(mhdr, ntmp, strip_ends(q));
767 break; /* Blank line means end of headers */
774 static char *strip_ends(char *name)
776 return strip_end(strip_start(name));
779 /* Strip a parameter of whitespace from start of param */
780 static char *strip_start(char *name)
783 /* Look for first non white space or quote */
784 for (p = name; (c = *p); p++) {
786 /* Next char is start of string if non null */
789 /* Else null string */
792 if (!isspace((unsigned char)c))
798 /* As above but strip from end of string : maybe should handle brackets? */
799 static char *strip_end(char *name)
804 /* Look for first non white space or quote */
805 for (p = name + strlen(name) - 1; p >= name; p--) {
813 if (isspace((unsigned char)c))
821 static MIME_HEADER *mime_hdr_new(char *name, char *value)
823 MIME_HEADER *mhdr = NULL;
824 char *tmpname = NULL, *tmpval = NULL, *p;
828 if ((tmpname = OPENSSL_strdup(name)) == NULL)
830 for (p = tmpname; *p; p++) {
831 c = (unsigned char)*p;
839 if ((tmpval = OPENSSL_strdup(value)) == NULL)
841 for (p = tmpval; *p; p++) {
842 c = (unsigned char)*p;
849 mhdr = OPENSSL_malloc(sizeof(*mhdr));
852 mhdr->name = tmpname;
853 mhdr->value = tmpval;
854 if ((mhdr->params = sk_MIME_PARAM_new(mime_param_cmp)) == NULL)
859 OPENSSL_free(tmpname);
860 OPENSSL_free(tmpval);
865 static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value)
867 char *tmpname = NULL, *tmpval = NULL, *p;
869 MIME_PARAM *mparam = NULL;
871 tmpname = OPENSSL_strdup(name);
874 for (p = tmpname; *p; p++) {
875 c = (unsigned char)*p;
883 tmpval = OPENSSL_strdup(value);
887 /* Parameter values are case sensitive so leave as is */
888 mparam = OPENSSL_malloc(sizeof(*mparam));
891 mparam->param_name = tmpname;
892 mparam->param_value = tmpval;
893 if (!sk_MIME_PARAM_push(mhdr->params, mparam))
897 OPENSSL_free(tmpname);
898 OPENSSL_free(tmpval);
899 OPENSSL_free(mparam);
903 static int mime_hdr_cmp(const MIME_HEADER *const *a,
904 const MIME_HEADER *const *b)
906 if (!(*a)->name || !(*b)->name)
907 return ! !(*a)->name - ! !(*b)->name;
909 return (strcmp((*a)->name, (*b)->name));
912 static int mime_param_cmp(const MIME_PARAM *const *a,
913 const MIME_PARAM *const *b)
915 if (!(*a)->param_name || !(*b)->param_name)
916 return ! !(*a)->param_name - ! !(*b)->param_name;
917 return (strcmp((*a)->param_name, (*b)->param_name));
920 /* Find a header with a given name (if possible) */
922 static MIME_HEADER *mime_hdr_find(STACK_OF(MIME_HEADER) *hdrs, char *name)
927 idx = sk_MIME_HEADER_find(hdrs, &htmp);
930 return sk_MIME_HEADER_value(hdrs, idx);
933 static MIME_PARAM *mime_param_find(MIME_HEADER *hdr, char *name)
937 param.param_name = name;
938 idx = sk_MIME_PARAM_find(hdr->params, ¶m);
941 return sk_MIME_PARAM_value(hdr->params, idx);
944 static void mime_hdr_free(MIME_HEADER *hdr)
946 OPENSSL_free(hdr->name);
947 OPENSSL_free(hdr->value);
949 sk_MIME_PARAM_pop_free(hdr->params, mime_param_free);
953 static void mime_param_free(MIME_PARAM *param)
955 OPENSSL_free(param->param_name);
956 OPENSSL_free(param->param_value);
961 * Check for a multipart boundary. Returns:
966 static int mime_bound_check(char *line, int linelen, char *bound, int blen)
969 linelen = strlen(line);
971 blen = strlen(bound);
972 /* Quickly eliminate if line length too short */
973 if (blen + 2 > linelen)
975 /* Check for part boundary */
976 if ((strncmp(line, "--", 2) == 0)
977 && strncmp(line + 2, bound, blen) == 0) {
978 if (strncmp(line + blen + 2, "--", 2) == 0)
986 static int strip_eol(char *linebuf, int *plen, int flags)
991 p = linebuf + len - 1;
992 for (p = linebuf + len - 1; len > 0; len--, p--) {
996 else if (is_eol && flags & SMIME_ASCIICRLF && c < 33)