crypto/cms/cms_io.c

   1 /*
   2  * Copyright 2008-2021 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_local.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     ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE);
  33     return 0;
  34 }
  35
  36 CMS_ContentInfo *d2i_CMS_bio(BIO *bp, CMS_ContentInfo **cms)
  37 {
  38     CMS_ContentInfo *ci;
  39     const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms == NULL ? NULL : *cms);
  40
  41     ci = ASN1_item_d2i_bio_ex(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms,
  42                               ossl_cms_ctx_get0_libctx(ctx),
  43                               ossl_cms_ctx_get0_propq(ctx));
  44     if (ci != NULL)
  45         ossl_cms_resolve_libctx(ci);
  46     return ci;
  47 }
  48
  49 int i2d_CMS_bio(BIO *bp, CMS_ContentInfo *cms)
  50 {
  51     return ASN1_item_i2d_bio(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms);
  52 }
  53
  54 IMPLEMENT_PEM_rw(CMS, CMS_ContentInfo, PEM_STRING_CMS, CMS_ContentInfo)
  55
  56 BIO *BIO_new_CMS(BIO *out, CMS_ContentInfo *cms)
  57 {
  58     return BIO_new_NDEF(out, (ASN1_VALUE *)cms,
  59                         ASN1_ITEM_rptr(CMS_ContentInfo));
  60 }
  61
  62 /* CMS wrappers round generalised stream and MIME routines */
  63
  64 int i2d_CMS_bio_stream(BIO *out, CMS_ContentInfo *cms, BIO *in, int flags)
  65 {
  66     return i2d_ASN1_bio_stream(out, (ASN1_VALUE *)cms, in, flags,
  67                                ASN1_ITEM_rptr(CMS_ContentInfo));
  68 }
  69
  70 int PEM_write_bio_CMS_stream(BIO *out, CMS_ContentInfo *cms, BIO *in,
  71                              int flags)
  72 {
  73     return PEM_write_bio_ASN1_stream(out, (ASN1_VALUE *)cms, in, flags,
  74                                      "CMS", ASN1_ITEM_rptr(CMS_ContentInfo));
  75 }
  76
  77 int SMIME_write_CMS(BIO *bio, CMS_ContentInfo *cms, BIO *data, int flags)
  78 {
  79     STACK_OF(X509_ALGOR) *mdalgs;
  80     int ctype_nid = OBJ_obj2nid(cms->contentType);
  81     int econt_nid = OBJ_obj2nid(CMS_get0_eContentType(cms));
  82     const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms);
  83
  84     if (ctype_nid == NID_pkcs7_signed)
  85         mdalgs = cms->d.signedData->digestAlgorithms;
  86     else
  87         mdalgs = NULL;
  88
  89     return SMIME_write_ASN1_ex(bio, (ASN1_VALUE *)cms, data, flags, ctype_nid,
  90                                econt_nid, mdalgs,
  91                                ASN1_ITEM_rptr(CMS_ContentInfo),
  92                                ossl_cms_ctx_get0_libctx(ctx),
  93                                ossl_cms_ctx_get0_propq(ctx));
  94 }
  95
  96 CMS_ContentInfo *SMIME_read_CMS_ex(BIO *bio, int flags, BIO **bcont,
  97                                    CMS_ContentInfo **cms)
  98 {
  99     CMS_ContentInfo *ci;
 100     const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms == NULL ? NULL : *cms);
 101
 102     ci = (CMS_ContentInfo *)SMIME_read_ASN1_ex(bio, flags, bcont,
 103                                                ASN1_ITEM_rptr(CMS_ContentInfo),
 104                                                (ASN1_VALUE **)cms,
 105                                                ossl_cms_ctx_get0_libctx(ctx),
 106                                                ossl_cms_ctx_get0_propq(ctx));
 107     if (ci != NULL)
 108         ossl_cms_resolve_libctx(ci);
 109     return ci;
 110 }
 111
 112 CMS_ContentInfo *SMIME_read_CMS(BIO *bio, BIO **bcont)
 113 {
 114     return SMIME_read_CMS_ex(bio, 0, bcont, NULL);
 115 }