a12ac0d0f4462bec3891c2ef5cbbf22eb2975756
[openssl.git] / crypto / cms / cms_io.c
1 /*
2  * Copyright 2008-2020 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 <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
40     ci = ASN1_item_d2i_bio(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms);
41     if (ci != NULL && cms != NULL)
42         cms_resolve_libctx(ci);
43     return ci;
44 }
45
46 int i2d_CMS_bio(BIO *bp, CMS_ContentInfo *cms)
47 {
48     return ASN1_item_i2d_bio(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms);
49 }
50
51 IMPLEMENT_PEM_rw(CMS, CMS_ContentInfo, PEM_STRING_CMS, CMS_ContentInfo)
52
53 BIO *BIO_new_CMS(BIO *out, CMS_ContentInfo *cms)
54 {
55     return BIO_new_NDEF(out, (ASN1_VALUE *)cms,
56                         ASN1_ITEM_rptr(CMS_ContentInfo));
57 }
58
59 /* CMS wrappers round generalised stream and MIME routines */
60
61 int i2d_CMS_bio_stream(BIO *out, CMS_ContentInfo *cms, BIO *in, int flags)
62 {
63     return i2d_ASN1_bio_stream(out, (ASN1_VALUE *)cms, in, flags,
64                                ASN1_ITEM_rptr(CMS_ContentInfo));
65 }
66
67 int PEM_write_bio_CMS_stream(BIO *out, CMS_ContentInfo *cms, BIO *in,
68                              int flags)
69 {
70     return PEM_write_bio_ASN1_stream(out, (ASN1_VALUE *)cms, in, flags,
71                                      "CMS", ASN1_ITEM_rptr(CMS_ContentInfo));
72 }
73
74 int SMIME_write_CMS(BIO *bio, CMS_ContentInfo *cms, BIO *data, int flags)
75 {
76     STACK_OF(X509_ALGOR) *mdalgs;
77     int ctype_nid = OBJ_obj2nid(cms->contentType);
78     int econt_nid = OBJ_obj2nid(CMS_get0_eContentType(cms));
79     const CMS_CTX *ctx = cms_get0_cmsctx(cms);
80
81     if (ctype_nid == NID_pkcs7_signed)
82         mdalgs = cms->d.signedData->digestAlgorithms;
83     else
84         mdalgs = NULL;
85
86     return SMIME_write_ASN1_ex(bio, (ASN1_VALUE *)cms, data, flags, ctype_nid,
87                                econt_nid, mdalgs,
88                                ASN1_ITEM_rptr(CMS_ContentInfo),
89                                cms_ctx_get0_libctx(ctx),
90                                cms_ctx_get0_propq(ctx));
91 }
92
93 CMS_ContentInfo *SMIME_read_CMS_ex(BIO *bio, BIO **bcont, CMS_ContentInfo **cms)
94 {
95     CMS_ContentInfo *ci;
96
97     ci = (CMS_ContentInfo *)SMIME_read_ASN1_ex(bio, bcont,
98                                                ASN1_ITEM_rptr(CMS_ContentInfo),
99                                                (ASN1_VALUE **)cms);
100     if (ci != NULL && cms != NULL)
101         cms_resolve_libctx(ci);
102     return ci;
103 }
104
105 CMS_ContentInfo *SMIME_read_CMS(BIO *bio, BIO **bcont)
106 {
107     return SMIME_read_CMS_ex(bio, bcont, NULL);
108 }