cms_io.c revision 193770 
1/* crypto/cms/cms_io.c */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project.
4 */
5/* ====================================================================
6 * Copyright (c) 2008 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#include <openssl/asn1t.h>
55#include <openssl/x509.h>
56#include <openssl/err.h>
57#include <openssl/pem.h>
58#include "cms.h"
59#include "cms_lcl.h"
60
61CMS_ContentInfo *d2i_CMS_bio(BIO *bp, CMS_ContentInfo **cms)
62	{
63	return ASN1_item_d2i_bio(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms);
64	}
65
66int i2d_CMS_bio(BIO *bp, CMS_ContentInfo *cms)
67	{
68	return ASN1_item_i2d_bio(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms);
69	}
70
71IMPLEMENT_PEM_rw_const(CMS, CMS_ContentInfo, PEM_STRING_CMS, CMS_ContentInfo)
72
73/* Callback for int_smime_write_ASN1 */
74
75static int cms_output_data(BIO *out, BIO *data, ASN1_VALUE *val, int flags,
76					const ASN1_ITEM *it)
77	{
78	CMS_ContentInfo *cms = (CMS_ContentInfo *)val;
79	BIO *tmpbio, *cmsbio;
80	int r = 0;
81
82	if (!(flags & SMIME_DETACHED))
83		{
84		SMIME_crlf_copy(data, out, flags);
85		return 1;
86		}
87
88	/* Let CMS code prepend any needed BIOs */
89
90	cmsbio = CMS_dataInit(cms, out);
91
92	if (!cmsbio)
93		return 0;
94
95	/* Copy data across, passing through filter BIOs for processing */
96	SMIME_crlf_copy(data, cmsbio, flags);
97
98	/* Finalize structure */
99	if (CMS_dataFinal(cms, cmsbio) <= 0)
100		goto err;
101
102	r = 1;
103
104	err:
105
106	/* Now remove any digests prepended to the BIO */
107
108	while (cmsbio != out)
109		{
110		tmpbio = BIO_pop(cmsbio);
111		BIO_free(cmsbio);
112		cmsbio = tmpbio;
113		}
114
115	return 1;
116
117	}
118
119
120int SMIME_write_CMS(BIO *bio, CMS_ContentInfo *cms, BIO *data, int flags)
121	{
122	STACK_OF(X509_ALGOR) *mdalgs;
123	int ctype_nid = OBJ_obj2nid(cms->contentType);
124	int econt_nid = OBJ_obj2nid(CMS_get0_eContentType(cms));
125	if (ctype_nid == NID_pkcs7_signed)
126		mdalgs = cms->d.signedData->digestAlgorithms;
127	else
128		mdalgs = NULL;
129
130	return int_smime_write_ASN1(bio, (ASN1_VALUE *)cms, data, flags,
131					ctype_nid, econt_nid, mdalgs,
132					cms_output_data,
133					ASN1_ITEM_rptr(CMS_ContentInfo));
134	}
135
136CMS_ContentInfo *SMIME_read_CMS(BIO *bio, BIO **bcont)
137	{
138	return (CMS_ContentInfo *)SMIME_read_ASN1(bio, bcont,
139					ASN1_ITEM_rptr(CMS_ContentInfo));
140	}
141