xref: /openssl/crypto/cms/cms_io.c (revision e077455e)
1 /*
2  * Copyright 2008-2022 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() */
CMS_stream(unsigned char *** boundary,CMS_ContentInfo * cms)18 int CMS_stream(unsigned char ***boundary, CMS_ContentInfo *cms)
19 {
20     ASN1_OCTET_STRING **pos;
21 
22     pos = CMS_get0_content(cms);
23     if (pos == NULL)
24         return 0;
25     if (*pos == NULL)
26         *pos = ASN1_OCTET_STRING_new();
27     if (*pos != NULL) {
28         (*pos)->flags |= ASN1_STRING_FLAG_NDEF;
29         (*pos)->flags &= ~ASN1_STRING_FLAG_CONT;
30         *boundary = &(*pos)->data;
31         return 1;
32     }
33     ERR_raise(ERR_LIB_CMS, ERR_R_CMS_LIB);
34     return 0;
35 }
36 
d2i_CMS_bio(BIO * bp,CMS_ContentInfo ** cms)37 CMS_ContentInfo *d2i_CMS_bio(BIO *bp, CMS_ContentInfo **cms)
38 {
39     CMS_ContentInfo *ci;
40     const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms == NULL ? NULL : *cms);
41 
42     ci = ASN1_item_d2i_bio_ex(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms,
43                               ossl_cms_ctx_get0_libctx(ctx),
44                               ossl_cms_ctx_get0_propq(ctx));
45     if (ci != NULL) {
46         ERR_set_mark();
47         ossl_cms_resolve_libctx(ci);
48         ERR_pop_to_mark();
49     }
50     return ci;
51 }
52 
i2d_CMS_bio(BIO * bp,CMS_ContentInfo * cms)53 int i2d_CMS_bio(BIO *bp, CMS_ContentInfo *cms)
54 {
55     return ASN1_item_i2d_bio(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms);
56 }
57 
IMPLEMENT_PEM_rw(CMS,CMS_ContentInfo,PEM_STRING_CMS,CMS_ContentInfo)58 IMPLEMENT_PEM_rw(CMS, CMS_ContentInfo, PEM_STRING_CMS, CMS_ContentInfo)
59 
60 BIO *BIO_new_CMS(BIO *out, CMS_ContentInfo *cms)
61 {
62     return BIO_new_NDEF(out, (ASN1_VALUE *)cms,
63                         ASN1_ITEM_rptr(CMS_ContentInfo));
64 }
65 
66 /* CMS wrappers round generalised stream and MIME routines */
67 
i2d_CMS_bio_stream(BIO * out,CMS_ContentInfo * cms,BIO * in,int flags)68 int i2d_CMS_bio_stream(BIO *out, CMS_ContentInfo *cms, BIO *in, int flags)
69 {
70     return i2d_ASN1_bio_stream(out, (ASN1_VALUE *)cms, in, flags,
71                                ASN1_ITEM_rptr(CMS_ContentInfo));
72 }
73 
PEM_write_bio_CMS_stream(BIO * out,CMS_ContentInfo * cms,BIO * in,int flags)74 int PEM_write_bio_CMS_stream(BIO *out, CMS_ContentInfo *cms, BIO *in,
75                              int flags)
76 {
77     return PEM_write_bio_ASN1_stream(out, (ASN1_VALUE *)cms, in, flags,
78                                      "CMS", ASN1_ITEM_rptr(CMS_ContentInfo));
79 }
80 
SMIME_write_CMS(BIO * bio,CMS_ContentInfo * cms,BIO * data,int flags)81 int SMIME_write_CMS(BIO *bio, CMS_ContentInfo *cms, BIO *data, int flags)
82 {
83     STACK_OF(X509_ALGOR) *mdalgs;
84     int ctype_nid = OBJ_obj2nid(cms->contentType);
85     int econt_nid = OBJ_obj2nid(CMS_get0_eContentType(cms));
86     const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms);
87 
88     if (ctype_nid == NID_pkcs7_signed)
89         mdalgs = cms->d.signedData->digestAlgorithms;
90     else
91         mdalgs = NULL;
92 
93     return SMIME_write_ASN1_ex(bio, (ASN1_VALUE *)cms, data, flags, ctype_nid,
94                                econt_nid, mdalgs,
95                                ASN1_ITEM_rptr(CMS_ContentInfo),
96                                ossl_cms_ctx_get0_libctx(ctx),
97                                ossl_cms_ctx_get0_propq(ctx));
98 }
99 
SMIME_read_CMS_ex(BIO * bio,int flags,BIO ** bcont,CMS_ContentInfo ** cms)100 CMS_ContentInfo *SMIME_read_CMS_ex(BIO *bio, int flags, BIO **bcont,
101                                    CMS_ContentInfo **cms)
102 {
103     CMS_ContentInfo *ci;
104     const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms == NULL ? NULL : *cms);
105 
106     ci = (CMS_ContentInfo *)SMIME_read_ASN1_ex(bio, flags, bcont,
107                                                ASN1_ITEM_rptr(CMS_ContentInfo),
108                                                (ASN1_VALUE **)cms,
109                                                ossl_cms_ctx_get0_libctx(ctx),
110                                                ossl_cms_ctx_get0_propq(ctx));
111     if (ci != NULL) {
112         ERR_set_mark();
113         ossl_cms_resolve_libctx(ci);
114         ERR_pop_to_mark();
115     }
116     return ci;
117 }
118 
SMIME_read_CMS(BIO * bio,BIO ** bcont)119 CMS_ContentInfo *SMIME_read_CMS(BIO *bio, BIO **bcont)
120 {
121     return SMIME_read_CMS_ex(bio, 0, bcont, NULL);
122 }
123