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
= OPENSSL_strdup(name
)) == NULL
)
834 for (p
= tmpname
; *p
; p
++) {
835 c
= (unsigned char)*p
;
843 if ((tmpval
= OPENSSL_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
= OPENSSL_strdup(name
);
878 for (p
= tmpname
; *p
; p
++) {
879 c
= (unsigned char)*p
;
887 tmpval
= OPENSSL_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)