crypto/pkcs7/pk7_mime.c

   1 /*
   2  * Copyright 1999-2020 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 <stdio.h>
  11 #include "internal/cryptlib.h"
  12 #include <openssl/x509.h>
  13 #include <openssl/asn1.h>
  14 #include "pk7_local.h"
  15
  16 /* PKCS#7 wrappers round generalised stream and MIME routines */
  17
  18 int i2d_PKCS7_bio_stream(BIO *out, PKCS7 *p7, BIO *in, int flags)
  19 {
  20     return i2d_ASN1_bio_stream(out, (ASN1_VALUE *)p7, in, flags,
  21                                ASN1_ITEM_rptr(PKCS7));
  22 }
  23
  24 int PEM_write_bio_PKCS7_stream(BIO *out, PKCS7 *p7, BIO *in, int flags)
  25 {
  26     return PEM_write_bio_ASN1_stream(out, (ASN1_VALUE *)p7, in, flags,
  27                                      "PKCS7", ASN1_ITEM_rptr(PKCS7));
  28 }
  29
  30 int SMIME_write_PKCS7(BIO *bio, PKCS7 *p7, BIO *data, int flags)
  31 {
  32     STACK_OF(X509_ALGOR) *mdalgs;
  33     int ctype_nid = OBJ_obj2nid(p7->type);
  34     const PKCS7_CTX *ctx = pkcs7_get0_ctx(p7);
  35
  36     if (ctype_nid == NID_pkcs7_signed)
  37         mdalgs = p7->d.sign->md_algs;
  38     else
  39         mdalgs = NULL;
  40
  41     flags ^= SMIME_OLDMIME;
  42
  43     return SMIME_write_ASN1_ex(bio, (ASN1_VALUE *)p7, data, flags, ctype_nid,
  44                                NID_undef, mdalgs, ASN1_ITEM_rptr(PKCS7),
  45                                pkcs7_ctx_get0_libctx(ctx),
  46                                pkcs7_ctx_get0_propq(ctx));
  47 }
  48
  49 PKCS7 *SMIME_read_PKCS7_ex(BIO *bio, BIO **bcont, PKCS7 **p7)
  50 {
  51     PKCS7 *ret;
  52
  53     ret = (PKCS7 *)SMIME_read_ASN1_ex(bio, bcont, ASN1_ITEM_rptr(PKCS7),
  54                                       (ASN1_VALUE **)p7);
  55     if (ret != NULL && p7 != NULL)
  56         pkcs7_resolve_libctx(ret);
  57     return ret;
  58 }
  59
  60 PKCS7 *SMIME_read_PKCS7(BIO *bio, BIO **bcont)
  61 {
  62     return SMIME_read_PKCS7_ex(bio, bcont, NULL);
  63 }