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 "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
75 struct mime_param_st
{
76 char *param_name
; /* Param name e.g. "micalg" */
77 char *param_value
; /* Param value e.g. "sha1" */
80 struct mime_header_st
{
81 char *name
; /* Name of line e.g. "content-type" */
82 char *value
; /* Value of line e.g. "text/plain" */
83 STACK_OF(MIME_PARAM
) *params
; /* Zero or more parameters */
86 static int asn1_output_data(BIO
*out
, BIO
*data
, ASN1_VALUE
*val
, int flags
,
88 static char *strip_ends(char *name
);
89 static char *strip_start(char *name
);
90 static char *strip_end(char *name
);
91 static MIME_HEADER
*mime_hdr_new(char *name
, char *value
);
92 static int mime_hdr_addparam(MIME_HEADER
*mhdr
, char *name
, char *value
);
93 static STACK_OF(MIME_HEADER
) *mime_parse_hdr(BIO
*bio
);
94 static int mime_hdr_cmp(const MIME_HEADER
*const *a
,
95 const MIME_HEADER
*const *b
);
96 static int mime_param_cmp(const MIME_PARAM
*const *a
,
97 const MIME_PARAM
*const *b
);
98 static void mime_param_free(MIME_PARAM
*param
);
99 static int mime_bound_check(char *line
, int linelen
, char *bound
, int blen
);
100 static int multi_split(BIO
*bio
, char *bound
, STACK_OF(BIO
) **ret
);
101 static int strip_eol(char *linebuf
, int *plen
, int flags
);
102 static MIME_HEADER
*mime_hdr_find(STACK_OF(MIME_HEADER
) *hdrs
, char *name
);
103 static MIME_PARAM
*mime_param_find(MIME_HEADER
*hdr
, char *name
);
104 static void mime_hdr_free(MIME_HEADER
*hdr
);
106 #define MAX_SMLEN 1024
107 #define mime_debug(x) /* x */
109 /* Output an ASN1 structure in BER format streaming if necessary */
111 int i2d_ASN1_bio_stream(BIO
*out
, ASN1_VALUE
*val
, BIO
*in
, int flags
,
114 /* If streaming create stream BIO and copy all content through it */
115 if (flags
& SMIME_STREAM
) {
117 bio
= BIO_new_NDEF(out
, val
, it
);
119 ASN1err(ASN1_F_I2D_ASN1_BIO_STREAM
, ERR_R_MALLOC_FAILURE
);
122 SMIME_crlf_copy(in
, bio
, flags
);
123 (void)BIO_flush(bio
);
124 /* Free up successive BIOs until we hit the old output BIO */
129 } while (bio
!= out
);
132 * else just write out ASN1 structure which will have all content stored
136 ASN1_item_i2d_bio(it
, out
, val
);
140 /* Base 64 read and write of ASN1 structure */
142 static int B64_write_ASN1(BIO
*out
, ASN1_VALUE
*val
, BIO
*in
, int flags
,
147 b64
= BIO_new(BIO_f_base64());
149 ASN1err(ASN1_F_B64_WRITE_ASN1
, ERR_R_MALLOC_FAILURE
);
153 * prepend the b64 BIO so all data is base64 encoded.
155 out
= BIO_push(b64
, out
);
156 r
= i2d_ASN1_bio_stream(out
, val
, in
, flags
, it
);
157 (void)BIO_flush(out
);
163 /* Streaming ASN1 PEM write */
165 int PEM_write_bio_ASN1_stream(BIO
*out
, ASN1_VALUE
*val
, BIO
*in
, int flags
,
166 const char *hdr
, const ASN1_ITEM
*it
)
169 BIO_printf(out
, "-----BEGIN %s-----\n", hdr
);
170 r
= B64_write_ASN1(out
, val
, in
, flags
, it
);
171 BIO_printf(out
, "-----END %s-----\n", hdr
);
175 static ASN1_VALUE
*b64_read_asn1(BIO
*bio
, const ASN1_ITEM
*it
)
180 if ((b64
= BIO_new(BIO_f_base64())) == NULL
) {
181 ASN1err(ASN1_F_B64_READ_ASN1
, ERR_R_MALLOC_FAILURE
);
184 bio
= BIO_push(b64
, bio
);
185 val
= ASN1_item_d2i_bio(it
, bio
, NULL
);
187 ASN1err(ASN1_F_B64_READ_ASN1
, ASN1_R_DECODE_ERROR
);
188 (void)BIO_flush(bio
);
194 /* Generate the MIME "micalg" parameter from RFC3851, RFC4490 */
196 static int asn1_write_micalg(BIO
*out
, STACK_OF(X509_ALGOR
) *mdalgs
)
199 int i
, have_unknown
= 0, write_comma
, ret
= 0, md_nid
;
202 for (i
= 0; i
< sk_X509_ALGOR_num(mdalgs
); i
++) {
204 BIO_write(out
, ",", 1);
206 md_nid
= OBJ_obj2nid(sk_X509_ALGOR_value(mdalgs
, i
)->algorithm
);
207 md
= EVP_get_digestbynid(md_nid
);
208 if (md
&& md
->md_ctrl
) {
211 rv
= md
->md_ctrl(NULL
, EVP_MD_CTRL_MICALG
, 0, &micstr
);
213 BIO_puts(out
, micstr
);
214 OPENSSL_free(micstr
);
222 BIO_puts(out
, "sha1");
226 BIO_puts(out
, "md5");
230 BIO_puts(out
, "sha-256");
234 BIO_puts(out
, "sha-384");
238 BIO_puts(out
, "sha-512");
241 case NID_id_GostR3411_94
:
242 BIO_puts(out
, "gostr3411-94");
249 BIO_puts(out
, "unknown");
266 int SMIME_write_ASN1(BIO
*bio
, ASN1_VALUE
*val
, BIO
*data
, int flags
,
267 int ctype_nid
, int econt_nid
,
268 STACK_OF(X509_ALGOR
) *mdalgs
, const ASN1_ITEM
*it
)
272 const char *mime_prefix
, *mime_eol
, *cname
= "smime.p7m";
273 const char *msg_type
= NULL
;
274 if (flags
& SMIME_OLDMIME
)
275 mime_prefix
= "application/x-pkcs7-";
277 mime_prefix
= "application/pkcs7-";
279 if (flags
& SMIME_CRLFEOL
)
283 if ((flags
& SMIME_DETACHED
) && data
) {
284 /* We want multipart/signed */
285 /* Generate a random boundary */
286 if (RAND_bytes((unsigned char *)bound
, 32) <= 0)
288 for (i
= 0; i
< 32; i
++) {
297 BIO_printf(bio
, "MIME-Version: 1.0%s", mime_eol
);
298 BIO_printf(bio
, "Content-Type: multipart/signed;");
299 BIO_printf(bio
, " protocol=\"%ssignature\";", mime_prefix
);
300 BIO_puts(bio
, " micalg=\"");
301 asn1_write_micalg(bio
, mdalgs
);
302 BIO_printf(bio
, "\"; boundary=\"----%s\"%s%s",
303 bound
, mime_eol
, mime_eol
);
304 BIO_printf(bio
, "This is an S/MIME signed message%s%s",
306 /* Now write out the first part */
307 BIO_printf(bio
, "------%s%s", bound
, mime_eol
);
308 if (!asn1_output_data(bio
, data
, val
, flags
, it
))
310 BIO_printf(bio
, "%s------%s%s", mime_eol
, bound
, mime_eol
);
312 /* Headers for signature */
314 BIO_printf(bio
, "Content-Type: %ssignature;", mime_prefix
);
315 BIO_printf(bio
, " name=\"smime.p7s\"%s", mime_eol
);
316 BIO_printf(bio
, "Content-Transfer-Encoding: base64%s", mime_eol
);
317 BIO_printf(bio
, "Content-Disposition: attachment;");
318 BIO_printf(bio
, " filename=\"smime.p7s\"%s%s", mime_eol
, mime_eol
);
319 B64_write_ASN1(bio
, val
, NULL
, 0, it
);
320 BIO_printf(bio
, "%s------%s--%s%s", mime_eol
, bound
,
325 /* Determine smime-type header */
327 if (ctype_nid
== NID_pkcs7_enveloped
)
328 msg_type
= "enveloped-data";
329 else if (ctype_nid
== NID_pkcs7_signed
) {
330 if (econt_nid
== NID_id_smime_ct_receipt
)
331 msg_type
= "signed-receipt";
332 else if (sk_X509_ALGOR_num(mdalgs
) >= 0)
333 msg_type
= "signed-data";
335 msg_type
= "certs-only";
336 } else if (ctype_nid
== NID_id_smime_ct_compressedData
) {
337 msg_type
= "compressed-data";
341 BIO_printf(bio
, "MIME-Version: 1.0%s", mime_eol
);
342 BIO_printf(bio
, "Content-Disposition: attachment;");
343 BIO_printf(bio
, " filename=\"%s\"%s", cname
, mime_eol
);
344 BIO_printf(bio
, "Content-Type: %smime;", mime_prefix
);
346 BIO_printf(bio
, " smime-type=%s;", msg_type
);
347 BIO_printf(bio
, " name=\"%s\"%s", cname
, mime_eol
);
348 BIO_printf(bio
, "Content-Transfer-Encoding: base64%s%s",
350 if (!B64_write_ASN1(bio
, val
, data
, flags
, it
))
352 BIO_printf(bio
, "%s", mime_eol
);
356 /* Handle output of ASN1 data */
358 static int asn1_output_data(BIO
*out
, BIO
*data
, ASN1_VALUE
*val
, int flags
,
362 const ASN1_AUX
*aux
= it
->funcs
;
363 ASN1_STREAM_ARG sarg
;
367 * If data is not deteched or resigning then the output BIO is already
368 * set up to finalise when it is written through.
370 if (!(flags
& SMIME_DETACHED
) || (flags
& PKCS7_REUSE_DIGEST
)) {
371 SMIME_crlf_copy(data
, out
, flags
);
375 if (!aux
|| !aux
->asn1_cb
) {
376 ASN1err(ASN1_F_ASN1_OUTPUT_DATA
, ASN1_R_STREAMING_NOT_SUPPORTED
);
381 sarg
.ndef_bio
= NULL
;
382 sarg
.boundary
= NULL
;
384 /* Let ASN1 code prepend any needed BIOs */
386 if (aux
->asn1_cb(ASN1_OP_DETACHED_PRE
, &val
, it
, &sarg
) <= 0)
389 /* Copy data across, passing through filter BIOs for processing */
390 SMIME_crlf_copy(data
, sarg
.ndef_bio
, flags
);
392 /* Finalize structure */
393 if (aux
->asn1_cb(ASN1_OP_DETACHED_POST
, &val
, it
, &sarg
) <= 0)
396 /* Now remove any digests prepended to the BIO */
398 while (sarg
.ndef_bio
!= out
) {
399 tmpbio
= BIO_pop(sarg
.ndef_bio
);
400 BIO_free(sarg
.ndef_bio
);
401 sarg
.ndef_bio
= tmpbio
;
409 * SMIME reader: handle multipart/signed and opaque signing. in multipart
410 * case the content is placed in a memory BIO pointed to by "bcont". In
411 * opaque this is set to NULL
414 ASN1_VALUE
*SMIME_read_ASN1(BIO
*bio
, BIO
**bcont
, const ASN1_ITEM
*it
)
417 STACK_OF(MIME_HEADER
) *headers
= NULL
;
418 STACK_OF(BIO
) *parts
= NULL
;
427 if ((headers
= mime_parse_hdr(bio
)) == NULL
) {
428 ASN1err(ASN1_F_SMIME_READ_ASN1
, ASN1_R_MIME_PARSE_ERROR
);
432 if ((hdr
= mime_hdr_find(headers
, "content-type")) == NULL
433 || hdr
->value
== NULL
) {
434 sk_MIME_HEADER_pop_free(headers
, mime_hdr_free
);
435 ASN1err(ASN1_F_SMIME_READ_ASN1
, ASN1_R_NO_CONTENT_TYPE
);
439 /* Handle multipart/signed */
441 if (strcmp(hdr
->value
, "multipart/signed") == 0) {
442 /* Split into two parts */
443 prm
= mime_param_find(hdr
, "boundary");
444 if (!prm
|| !prm
->param_value
) {
445 sk_MIME_HEADER_pop_free(headers
, mime_hdr_free
);
446 ASN1err(ASN1_F_SMIME_READ_ASN1
, ASN1_R_NO_MULTIPART_BOUNDARY
);
449 ret
= multi_split(bio
, prm
->param_value
, &parts
);
450 sk_MIME_HEADER_pop_free(headers
, mime_hdr_free
);
451 if (!ret
|| (sk_BIO_num(parts
) != 2)) {
452 ASN1err(ASN1_F_SMIME_READ_ASN1
, ASN1_R_NO_MULTIPART_BODY_FAILURE
);
453 sk_BIO_pop_free(parts
, BIO_vfree
);
457 /* Parse the signature piece */
458 asnin
= sk_BIO_value(parts
, 1);
460 if ((headers
= mime_parse_hdr(asnin
)) == NULL
) {
461 ASN1err(ASN1_F_SMIME_READ_ASN1
, ASN1_R_MIME_SIG_PARSE_ERROR
);
462 sk_BIO_pop_free(parts
, BIO_vfree
);
466 /* Get content type */
468 if ((hdr
= mime_hdr_find(headers
, "content-type")) == NULL
469 || hdr
->value
== NULL
) {
470 sk_MIME_HEADER_pop_free(headers
, mime_hdr_free
);
471 ASN1err(ASN1_F_SMIME_READ_ASN1
, ASN1_R_NO_SIG_CONTENT_TYPE
);
475 if (strcmp(hdr
->value
, "application/x-pkcs7-signature") &&
476 strcmp(hdr
->value
, "application/pkcs7-signature")) {
477 ASN1err(ASN1_F_SMIME_READ_ASN1
, ASN1_R_SIG_INVALID_MIME_TYPE
);
478 ERR_add_error_data(2, "type: ", hdr
->value
);
479 sk_MIME_HEADER_pop_free(headers
, mime_hdr_free
);
480 sk_BIO_pop_free(parts
, BIO_vfree
);
483 sk_MIME_HEADER_pop_free(headers
, mime_hdr_free
);
485 if ((val
= b64_read_asn1(asnin
, it
)) == NULL
) {
486 ASN1err(ASN1_F_SMIME_READ_ASN1
, ASN1_R_ASN1_SIG_PARSE_ERROR
);
487 sk_BIO_pop_free(parts
, BIO_vfree
);
492 *bcont
= sk_BIO_value(parts
, 0);
496 sk_BIO_pop_free(parts
, BIO_vfree
);
500 /* OK, if not multipart/signed try opaque signature */
502 if (strcmp(hdr
->value
, "application/x-pkcs7-mime") &&
503 strcmp(hdr
->value
, "application/pkcs7-mime")) {
504 ASN1err(ASN1_F_SMIME_READ_ASN1
, ASN1_R_INVALID_MIME_TYPE
);
505 ERR_add_error_data(2, "type: ", hdr
->value
);
506 sk_MIME_HEADER_pop_free(headers
, mime_hdr_free
);
510 sk_MIME_HEADER_pop_free(headers
, mime_hdr_free
);
512 if ((val
= b64_read_asn1(bio
, it
)) == NULL
) {
513 ASN1err(ASN1_F_SMIME_READ_ASN1
, ASN1_R_ASN1_PARSE_ERROR
);
520 /* Copy text from one BIO to another making the output CRLF at EOL */
521 int SMIME_crlf_copy(BIO
*in
, BIO
*out
, int flags
)
526 char linebuf
[MAX_SMLEN
];
528 * Buffer output so we don't write one line at a time. This is useful
529 * when streaming as we don't end up with one OCTET STRING per line.
531 bf
= BIO_new(BIO_f_buffer());
534 out
= BIO_push(bf
, out
);
535 if (flags
& SMIME_BINARY
) {
536 while ((len
= BIO_read(in
, linebuf
, MAX_SMLEN
)) > 0)
537 BIO_write(out
, linebuf
, len
);
540 if (flags
& SMIME_TEXT
)
541 BIO_printf(out
, "Content-Type: text/plain\r\n\r\n");
542 while ((len
= BIO_gets(in
, linebuf
, MAX_SMLEN
)) > 0) {
543 eol
= strip_eol(linebuf
, &len
, flags
);
545 /* Not EOF: write out all CRLF */
546 if (flags
& SMIME_ASCIICRLF
) {
548 for (i
= 0; i
< eolcnt
; i
++)
549 BIO_write(out
, "\r\n", 2);
552 BIO_write(out
, linebuf
, len
);
554 BIO_write(out
, "\r\n", 2);
555 } else if (flags
& SMIME_ASCIICRLF
)
558 BIO_write(out
, "\r\n", 2);
561 (void)BIO_flush(out
);
567 /* Strip off headers if they are text/plain */
568 int SMIME_text(BIO
*in
, BIO
*out
)
572 STACK_OF(MIME_HEADER
) *headers
;
575 if ((headers
= mime_parse_hdr(in
)) == NULL
) {
576 ASN1err(ASN1_F_SMIME_TEXT
, ASN1_R_MIME_PARSE_ERROR
);
579 if ((hdr
= mime_hdr_find(headers
, "content-type")) == NULL
580 || hdr
->value
== NULL
) {
581 ASN1err(ASN1_F_SMIME_TEXT
, ASN1_R_MIME_NO_CONTENT_TYPE
);
582 sk_MIME_HEADER_pop_free(headers
, mime_hdr_free
);
585 if (strcmp(hdr
->value
, "text/plain")) {
586 ASN1err(ASN1_F_SMIME_TEXT
, ASN1_R_INVALID_MIME_TYPE
);
587 ERR_add_error_data(2, "type: ", hdr
->value
);
588 sk_MIME_HEADER_pop_free(headers
, mime_hdr_free
);
591 sk_MIME_HEADER_pop_free(headers
, mime_hdr_free
);
592 while ((len
= BIO_read(in
, iobuf
, sizeof(iobuf
))) > 0)
593 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();
621 while ((len
= BIO_gets(bio
, linebuf
, MAX_SMLEN
)) > 0) {
622 state
= mime_bound_check(linebuf
, len
, bound
, blen
);
626 } else if (state
== 2) {
627 if (!sk_BIO_push(parts
, bpart
)) {
633 /* Strip CR+LF from linebuf */
634 next_eol
= strip_eol(linebuf
, &len
, 0);
638 if (!sk_BIO_push(parts
, bpart
)) {
642 bpart
= BIO_new(BIO_s_mem());
645 BIO_set_mem_eof_return(bpart
, 0);
647 BIO_write(bpart
, "\r\n", 2);
650 BIO_write(bpart
, linebuf
, len
);
657 /* This is the big one: parse MIME header lines up to message body */
659 #define MIME_INVALID 0
665 #define MIME_COMMENT 6
667 static STACK_OF(MIME_HEADER
) *mime_parse_hdr(BIO
*bio
)
671 char linebuf
[MAX_SMLEN
];
672 MIME_HEADER
*mhdr
= NULL
;
673 STACK_OF(MIME_HEADER
) *headers
;
674 int len
, state
, save_state
= 0;
676 headers
= sk_MIME_HEADER_new(mime_hdr_cmp
);
679 while ((len
= BIO_gets(bio
, linebuf
, MAX_SMLEN
)) > 0) {
680 /* If whitespace at line start then continuation line */
681 if (mhdr
&& isspace((unsigned char)linebuf
[0]))
686 /* Go through all characters */
687 for (p
= linebuf
, q
= linebuf
; (c
= *p
) && (c
!= '\r') && (c
!= '\n');
691 * State machine to handle MIME headers if this looks horrible
692 * that's because it *is*
700 ntmp
= strip_ends(q
);
707 mime_debug("Found End Value\n");
709 mhdr
= mime_hdr_new(ntmp
, strip_ends(q
));
710 sk_MIME_HEADER_push(headers
, mhdr
);
714 } else if (c
== '(') {
716 state
= MIME_COMMENT
;
730 ntmp
= strip_ends(q
);
739 mime_hdr_addparam(mhdr
, ntmp
, strip_ends(q
));
742 } else if (c
== '"') {
743 mime_debug("Found Quote\n");
745 } else if (c
== '(') {
747 state
= MIME_COMMENT
;
753 mime_debug("Found Match Quote\n");
760 if (state
== MIME_TYPE
) {
761 mhdr
= mime_hdr_new(ntmp
, strip_ends(q
));
762 sk_MIME_HEADER_push(headers
, mhdr
);
763 } else if (state
== MIME_VALUE
)
764 mime_hdr_addparam(mhdr
, ntmp
, strip_ends(q
));
766 break; /* Blank line means end of headers */
773 static char *strip_ends(char *name
)
775 return strip_end(strip_start(name
));
778 /* Strip a parameter of whitespace from start of param */
779 static char *strip_start(char *name
)
782 /* Look for first non white space or quote */
783 for (p
= name
; (c
= *p
); p
++) {
785 /* Next char is start of string if non null */
788 /* Else null string */
791 if (!isspace((unsigned char)c
))
797 /* As above but strip from end of string : maybe should handle brackets? */
798 static char *strip_end(char *name
)
803 /* Look for first non white space or quote */
804 for (p
= name
+ strlen(name
) - 1; p
>= name
; p
--) {
812 if (isspace((unsigned char)c
))
820 static MIME_HEADER
*mime_hdr_new(char *name
, char *value
)
822 MIME_HEADER
*mhdr
= NULL
;
823 char *tmpname
= NULL
, *tmpval
= NULL
, *p
;
827 if ((tmpname
= OPENSSL_strdup(name
)) == NULL
)
829 for (p
= tmpname
; *p
; p
++) {
830 c
= (unsigned char)*p
;
838 if ((tmpval
= OPENSSL_strdup(value
)) == NULL
)
840 for (p
= tmpval
; *p
; p
++) {
841 c
= (unsigned char)*p
;
848 mhdr
= OPENSSL_malloc(sizeof(*mhdr
));
851 mhdr
->name
= tmpname
;
852 mhdr
->value
= tmpval
;
853 if ((mhdr
->params
= sk_MIME_PARAM_new(mime_param_cmp
)) == NULL
)
858 OPENSSL_free(tmpname
);
859 OPENSSL_free(tmpval
);
864 static int mime_hdr_addparam(MIME_HEADER
*mhdr
, char *name
, char *value
)
866 char *tmpname
= NULL
, *tmpval
= NULL
, *p
;
868 MIME_PARAM
*mparam
= NULL
;
870 tmpname
= OPENSSL_strdup(name
);
873 for (p
= tmpname
; *p
; p
++) {
874 c
= (unsigned char)*p
;
882 tmpval
= OPENSSL_strdup(value
);
886 /* Parameter values are case sensitive so leave as is */
887 mparam
= OPENSSL_malloc(sizeof(*mparam
));
890 mparam
->param_name
= tmpname
;
891 mparam
->param_value
= tmpval
;
892 if (!sk_MIME_PARAM_push(mhdr
->params
, mparam
))
896 OPENSSL_free(tmpname
);
897 OPENSSL_free(tmpval
);
898 OPENSSL_free(mparam
);
902 static int mime_hdr_cmp(const MIME_HEADER
*const *a
,
903 const MIME_HEADER
*const *b
)
905 if (!(*a
)->name
|| !(*b
)->name
)
906 return ! !(*a
)->name
- ! !(*b
)->name
;
908 return (strcmp((*a
)->name
, (*b
)->name
));
911 static int mime_param_cmp(const MIME_PARAM
*const *a
,
912 const MIME_PARAM
*const *b
)
914 if (!(*a
)->param_name
|| !(*b
)->param_name
)
915 return ! !(*a
)->param_name
- ! !(*b
)->param_name
;
916 return (strcmp((*a
)->param_name
, (*b
)->param_name
));
919 /* Find a header with a given name (if possible) */
921 static MIME_HEADER
*mime_hdr_find(STACK_OF(MIME_HEADER
) *hdrs
, char *name
)
926 idx
= sk_MIME_HEADER_find(hdrs
, &htmp
);
929 return sk_MIME_HEADER_value(hdrs
, idx
);
932 static MIME_PARAM
*mime_param_find(MIME_HEADER
*hdr
, char *name
)
936 param
.param_name
= name
;
937 idx
= sk_MIME_PARAM_find(hdr
->params
, ¶m
);
940 return sk_MIME_PARAM_value(hdr
->params
, idx
);
943 static void mime_hdr_free(MIME_HEADER
*hdr
)
945 OPENSSL_free(hdr
->name
);
946 OPENSSL_free(hdr
->value
);
948 sk_MIME_PARAM_pop_free(hdr
->params
, mime_param_free
);
952 static void mime_param_free(MIME_PARAM
*param
)
954 OPENSSL_free(param
->param_name
);
955 OPENSSL_free(param
->param_value
);
960 * Check for a multipart boundary. Returns:
965 static int mime_bound_check(char *line
, int linelen
, char *bound
, int blen
)
968 linelen
= strlen(line
);
970 blen
= strlen(bound
);
971 /* Quickly eliminate if line length too short */
972 if (blen
+ 2 > linelen
)
974 /* Check for part boundary */
975 if ((strncmp(line
, "--", 2) == 0)
976 && strncmp(line
+ 2, bound
, blen
) == 0) {
977 if (strncmp(line
+ blen
+ 2, "--", 2) == 0)
985 static int strip_eol(char *linebuf
, int *plen
, int flags
)
990 p
= linebuf
+ len
- 1;
991 for (p
= linebuf
+ len
- 1; len
> 0; len
--, p
--) {
995 else if (is_eol
&& flags
& SMIME_ASCIICRLF
&& c
< 33)