cms_io.c revision 296465 
1/* crypto/cms/cms_io.c */
2/*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
4 * project.
5 */
6/* ====================================================================
7 * Copyright (c) 2008 The OpenSSL Project.  All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 *
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
19 *    distribution.
20 *
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/)"
25 *
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.
30 *
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.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 *    acknowledgment:
37 *    "This product includes software developed by the OpenSSL Project
38 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
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 * ====================================================================
53 */
54
55#include <openssl/asn1t.h>
56#include <openssl/x509.h>
57#include <openssl/err.h>
58#include <openssl/pem.h>
59#include "cms.h"
60#include "cms_lcl.h"
61
62CMS_ContentInfo *d2i_CMS_bio(BIO *bp, CMS_ContentInfo **cms)
63{
64    return ASN1_item_d2i_bio(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms);
65}
66
67int i2d_CMS_bio(BIO *bp, CMS_ContentInfo *cms)
68{
69    return ASN1_item_i2d_bio(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms);
70}
71
72IMPLEMENT_PEM_rw_const(CMS, CMS_ContentInfo, PEM_STRING_CMS, CMS_ContentInfo)
73
74/* Callback for int_smime_write_ASN1 */
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        SMIME_crlf_copy(data, out, flags);
84        return 1;
85    }
86
87    /* Let CMS code prepend any needed BIOs */
88
89    cmsbio = CMS_dataInit(cms, out);
90
91    if (!cmsbio)
92        return 0;
93
94    /* Copy data across, passing through filter BIOs for processing */
95    SMIME_crlf_copy(data, cmsbio, flags);
96
97    /* Finalize structure */
98    if (CMS_dataFinal(cms, cmsbio) <= 0)
99        goto err;
100
101    r = 1;
102
103 err:
104
105    /* Now remove any digests prepended to the BIO */
106
107    while (cmsbio != out) {
108        tmpbio = BIO_pop(cmsbio);
109        BIO_free(cmsbio);
110        cmsbio = tmpbio;
111    }
112
113    return r;
114
115}
116
117int SMIME_write_CMS(BIO *bio, CMS_ContentInfo *cms, BIO *data, int flags)
118{
119    STACK_OF(X509_ALGOR) *mdalgs;
120    int ctype_nid = OBJ_obj2nid(cms->contentType);
121    int econt_nid = OBJ_obj2nid(CMS_get0_eContentType(cms));
122    if (ctype_nid == NID_pkcs7_signed)
123        mdalgs = cms->d.signedData->digestAlgorithms;
124    else
125        mdalgs = NULL;
126
127    return int_smime_write_ASN1(bio, (ASN1_VALUE *)cms, data, flags,
128                                ctype_nid, econt_nid, mdalgs,
129                                cms_output_data,
130                                ASN1_ITEM_rptr(CMS_ContentInfo));
131}
132
133CMS_ContentInfo *SMIME_read_CMS(BIO *bio, BIO **bcont)
134{
135    return (CMS_ContentInfo *)SMIME_read_ASN1(bio, bcont,
136                                              ASN1_ITEM_rptr
137                                              (CMS_ContentInfo));
138}
139