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 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
d2i_CMS_bio(BIO * bp,CMS_ContentInfo ** cms)36 CMS_ContentInfo *d2i_CMS_bio(BIO *bp, CMS_ContentInfo **cms)
37 {
38 CMS_ContentInfo *ci;
39 const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms == NULL ? NULL : *cms);
40
41 ci = ASN1_item_d2i_bio_ex(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms,
42 ossl_cms_ctx_get0_libctx(ctx),
43 ossl_cms_ctx_get0_propq(ctx));
44 if (ci != NULL) {
45 ERR_set_mark();
46 ossl_cms_resolve_libctx(ci);
47 ERR_pop_to_mark();
48 }
49 return ci;
50 }
51
i2d_CMS_bio(BIO * bp,CMS_ContentInfo * cms)52 int i2d_CMS_bio(BIO *bp, CMS_ContentInfo *cms)
53 {
54 return ASN1_item_i2d_bio(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms);
55 }
56
IMPLEMENT_PEM_rw(CMS,CMS_ContentInfo,PEM_STRING_CMS,CMS_ContentInfo)57 IMPLEMENT_PEM_rw(CMS, CMS_ContentInfo, PEM_STRING_CMS, CMS_ContentInfo)
58
59 BIO *BIO_new_CMS(BIO *out, CMS_ContentInfo *cms)
60 {
61 return BIO_new_NDEF(out, (ASN1_VALUE *)cms,
62 ASN1_ITEM_rptr(CMS_ContentInfo));
63 }
64
65 /* CMS wrappers round generalised stream and MIME routines */
66
i2d_CMS_bio_stream(BIO * out,CMS_ContentInfo * cms,BIO * in,int flags)67 int i2d_CMS_bio_stream(BIO *out, CMS_ContentInfo *cms, BIO *in, int flags)
68 {
69 return i2d_ASN1_bio_stream(out, (ASN1_VALUE *)cms, in, flags,
70 ASN1_ITEM_rptr(CMS_ContentInfo));
71 }
72
PEM_write_bio_CMS_stream(BIO * out,CMS_ContentInfo * cms,BIO * in,int flags)73 int PEM_write_bio_CMS_stream(BIO *out, CMS_ContentInfo *cms, BIO *in,
74 int flags)
75 {
76 return PEM_write_bio_ASN1_stream(out, (ASN1_VALUE *)cms, in, flags,
77 "CMS", ASN1_ITEM_rptr(CMS_ContentInfo));
78 }
79
SMIME_write_CMS(BIO * bio,CMS_ContentInfo * cms,BIO * data,int flags)80 int SMIME_write_CMS(BIO *bio, CMS_ContentInfo *cms, BIO *data, int flags)
81 {
82 STACK_OF(X509_ALGOR) *mdalgs;
83 int ctype_nid = OBJ_obj2nid(cms->contentType);
84 int econt_nid = OBJ_obj2nid(CMS_get0_eContentType(cms));
85 const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms);
86
87 if (ctype_nid == NID_pkcs7_signed)
88 mdalgs = cms->d.signedData->digestAlgorithms;
89 else
90 mdalgs = NULL;
91
92 return SMIME_write_ASN1_ex(bio, (ASN1_VALUE *)cms, data, flags, ctype_nid,
93 econt_nid, mdalgs,
94 ASN1_ITEM_rptr(CMS_ContentInfo),
95 ossl_cms_ctx_get0_libctx(ctx),
96 ossl_cms_ctx_get0_propq(ctx));
97 }
98
SMIME_read_CMS_ex(BIO * bio,int flags,BIO ** bcont,CMS_ContentInfo ** cms)99 CMS_ContentInfo *SMIME_read_CMS_ex(BIO *bio, int flags, BIO **bcont,
100 CMS_ContentInfo **cms)
101 {
102 CMS_ContentInfo *ci;
103 const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms == NULL ? NULL : *cms);
104
105 ci = (CMS_ContentInfo *)SMIME_read_ASN1_ex(bio, flags, bcont,
106 ASN1_ITEM_rptr(CMS_ContentInfo),
107 (ASN1_VALUE **)cms,
108 ossl_cms_ctx_get0_libctx(ctx),
109 ossl_cms_ctx_get0_propq(ctx));
110 if (ci != NULL) {
111 ERR_set_mark();
112 ossl_cms_resolve_libctx(ci);
113 ERR_pop_to_mark();
114 }
115 return ci;
116 }
117
SMIME_read_CMS(BIO * bio,BIO ** bcont)118 CMS_ContentInfo *SMIME_read_CMS(BIO *bio, BIO **bcont)
119 {
120 return SMIME_read_CMS_ex(bio, 0, bcont, NULL);
121 }
122