1/*
2 * Copyright 1999-2024 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
18int 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
24int 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
30int 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 = ossl_pkcs7_get0_ctx(p7);
35
36    if (ctype_nid == NID_pkcs7_signed) {
37        if (p7->d.sign == NULL)
38            return 0;
39        mdalgs = p7->d.sign->md_algs;
40    } else {
41        mdalgs = NULL;
42    }
43
44    flags ^= SMIME_OLDMIME;
45
46    return SMIME_write_ASN1_ex(bio, (ASN1_VALUE *)p7, data, flags, ctype_nid,
47                               NID_undef, mdalgs, ASN1_ITEM_rptr(PKCS7),
48                               ossl_pkcs7_ctx_get0_libctx(ctx),
49                               ossl_pkcs7_ctx_get0_propq(ctx));
50}
51
52PKCS7 *SMIME_read_PKCS7_ex(BIO *bio, BIO **bcont, PKCS7 **p7)
53{
54    PKCS7 *ret;
55    OSSL_LIB_CTX *libctx = NULL;
56    const char *propq = NULL;
57
58    if (p7 != NULL && *p7 != NULL) {
59        libctx = (*p7)->ctx.libctx;
60        propq = (*p7)->ctx.propq;
61    }
62
63    ret = (PKCS7 *)SMIME_read_ASN1_ex(bio, 0, bcont, ASN1_ITEM_rptr(PKCS7),
64                                      (ASN1_VALUE **)p7, libctx, propq);
65    if (ret != NULL)
66        ossl_pkcs7_resolve_libctx(ret);
67    return ret;
68}
69
70PKCS7 *SMIME_read_PKCS7(BIO *bio, BIO **bcont)
71{
72    return SMIME_read_PKCS7_ex(bio, bcont, NULL);
73}
74