1/* pk7_mime.c */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project.
4 */
5/* ====================================================================
6 * Copyright (c) 1999-2005 The OpenSSL Project.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 *
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
18 *    distribution.
19 *
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/)"
24 *
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.
29 *
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.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 *    acknowledgment:
36 *    "This product includes software developed by the OpenSSL Project
37 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
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 * ====================================================================
52 *
53 */
54
55#include <stdio.h>
56#include <ctype.h>
57#include "cryptlib.h"
58#include <openssl/rand.h>
59#include <openssl/x509.h>
60#include <openssl/asn1.h>
61
62/* PKCS#7 wrappers round generalised MIME routines */
63
64PKCS7 *SMIME_read_PKCS7(BIO *bio, BIO **bcont)
65	{
66	return (PKCS7 *)SMIME_read_ASN1(bio, bcont, ASN1_ITEM_rptr(PKCS7));
67	}
68
69/* Callback for int_smime_write_ASN1 */
70
71static int pk7_output_data(BIO *out, BIO *data, ASN1_VALUE *val, int flags,
72					const ASN1_ITEM *it)
73	{
74	PKCS7 *p7 = (PKCS7 *)val;
75	BIO *tmpbio, *p7bio;
76
77	if (!(flags & SMIME_DETACHED))
78		{
79		SMIME_crlf_copy(data, out, flags);
80		return 1;
81		}
82
83	/* Let PKCS7 code prepend any needed BIOs */
84
85	p7bio = PKCS7_dataInit(p7, out);
86
87	if (!p7bio)
88		return 0;
89
90	/* Copy data across, passing through filter BIOs for processing */
91	SMIME_crlf_copy(data, p7bio, flags);
92
93	/* Finalize structure */
94	if (PKCS7_dataFinal(p7, p7bio) <= 0)
95		goto err;
96
97	err:
98
99	/* Now remove any digests prepended to the BIO */
100
101	while (p7bio != out)
102		{
103		tmpbio = BIO_pop(p7bio);
104		BIO_free(p7bio);
105		p7bio = tmpbio;
106		}
107
108	return 1;
109
110	}
111
112int SMIME_write_PKCS7(BIO *bio, PKCS7 *p7, BIO *data, int flags)
113	{
114	STACK_OF(X509_ALGOR) *mdalgs;
115	int ctype_nid = OBJ_obj2nid(p7->type);
116	if (ctype_nid == NID_pkcs7_signed)
117		mdalgs = p7->d.sign->md_algs;
118	else
119		mdalgs = NULL;
120
121	return int_smime_write_ASN1(bio, (ASN1_VALUE *)p7, data, flags,
122					ctype_nid, NID_undef, mdalgs,
123					pk7_output_data,
124					ASN1_ITEM_rptr(PKCS7));
125	}
126