crypto/openssl-0.9/crypto/cms/cms_io.c

   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
  61 CMS_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
  66 int i2d_CMS_bio(BIO *bp, CMS_ContentInfo *cms)
  67         {
  68         return ASN1_item_i2d_bio(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms);
  69         }
  70
  71 IMPLEMENT_PEM_rw_const(CMS, CMS_ContentInfo, PEM_STRING_CMS, CMS_ContentInfo)
  72
  73 /* Callback for int_smime_write_ASN1 */
  74
  75 static 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
 120 int 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
 136 CMS_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         }