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
