crypto/cms/cms_io.c

   1 /*
   2  * Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <openssl/asn1t.h>
  11 #include <openssl/x509.h>
  12 #include <openssl/err.h>
  13 #include <openssl/pem.h>
  14 #include <openssl/cms.h>
  15 #include "cms_lcl.h"
  16
  17 /* unfortunately cannot constify BIO_new_NDEF() due to this and PKCS7_stream() */
  18 int CMS_stream(unsigned char ***boundary, CMS_ContentInfo *cms)
  19 {
  20     ASN1_OCTET_STRING **pos;
  21     pos = CMS_get0_content(cms);
  22     if (pos == NULL)
  23         return 0;
  24     if (*pos == NULL)
  25         *pos = ASN1_OCTET_STRING_new();
  26     if (*pos != NULL) {
  27         (*pos)->flags |= ASN1_STRING_FLAG_NDEF;
  28         (*pos)->flags &= ~ASN1_STRING_FLAG_CONT;
  29         *boundary = &(*pos)->data;
  30         return 1;
  31     }
  32     CMSerr(CMS_F_CMS_STREAM, ERR_R_MALLOC_FAILURE);
  33     return 0;
  34 }
  35
  36 CMS_ContentInfo *d2i_CMS_bio(BIO *bp, CMS_ContentInfo **cms)
  37 {
  38     return ASN1_item_d2i_bio(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms);
  39 }
  40
  41 int i2d_CMS_bio(BIO *bp, CMS_ContentInfo *cms)
  42 {
  43     return ASN1_item_i2d_bio(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms);
  44 }
  45
  46 IMPLEMENT_PEM_rw_const(CMS, CMS_ContentInfo, PEM_STRING_CMS, CMS_ContentInfo)
  47
  48 BIO *BIO_new_CMS(BIO *out, CMS_ContentInfo *cms)
  49 {
  50     return BIO_new_NDEF(out, (ASN1_VALUE *)cms,
  51                         ASN1_ITEM_rptr(CMS_ContentInfo));
  52 }
  53
  54 /* CMS wrappers round generalised stream and MIME routines */
  55
  56 int i2d_CMS_bio_stream(BIO *out, CMS_ContentInfo *cms, BIO *in, int flags)
  57 {
  58     return i2d_ASN1_bio_stream(out, (ASN1_VALUE *)cms, in, flags,
  59                                ASN1_ITEM_rptr(CMS_ContentInfo));
  60 }
  61
  62 int PEM_write_bio_CMS_stream(BIO *out, CMS_ContentInfo *cms, BIO *in,
  63                              int flags)
  64 {
  65     return PEM_write_bio_ASN1_stream(out, (ASN1_VALUE *)cms, in, flags,
  66                                      "CMS", ASN1_ITEM_rptr(CMS_ContentInfo));
  67 }
  68
  69 int SMIME_write_CMS(BIO *bio, CMS_ContentInfo *cms, BIO *data, int flags)
  70 {
  71     STACK_OF(X509_ALGOR) *mdalgs;
  72     int ctype_nid = OBJ_obj2nid(cms->contentType);
  73     int econt_nid = OBJ_obj2nid(CMS_get0_eContentType(cms));
  74     if (ctype_nid == NID_pkcs7_signed)
  75         mdalgs = cms->d.signedData->digestAlgorithms;
  76     else
  77         mdalgs = NULL;
  78
  79     return SMIME_write_ASN1(bio, (ASN1_VALUE *)cms, data, flags,
  80                             ctype_nid, econt_nid, mdalgs,
  81                             ASN1_ITEM_rptr(CMS_ContentInfo));
  82 }
  83
  84 CMS_ContentInfo *SMIME_read_CMS(BIO *bio, BIO **bcont)
  85 {
  86     return (CMS_ContentInfo *)SMIME_read_ASN1(bio, bcont,
  87                                               ASN1_ITEM_rptr
  88                                               (CMS_ContentInfo));
  89 }