PEM: constify PEM_write_ routines
[openssl.git] / crypto / cms / cms_io.c
1 /*
2  * Copyright 2008-2016 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     CMSerr(CMS_F_CMS_STREAM, ERR_R_MALLOC_FAILURE);
33     return 0;
34 }
35
36 CMS_ContentInfo *d2i_CMS_bio(BIO *bp, CMS_ContentInfo **cms)
37 {
38     return ASN1_item_d2i_bio(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms);
39 }
40
41 int i2d_CMS_bio(BIO *bp, CMS_ContentInfo *cms)
42 {
43     return ASN1_item_i2d_bio(ASN1_ITEM_rptr(CMS_ContentInfo), bp, cms);
44 }
45
46 IMPLEMENT_PEM_rw(CMS, CMS_ContentInfo, PEM_STRING_CMS, CMS_ContentInfo)
47
48 BIO *BIO_new_CMS(BIO *out, CMS_ContentInfo *cms)
49 {
50     return BIO_new_NDEF(out, (ASN1_VALUE *)cms,
51                         ASN1_ITEM_rptr(CMS_ContentInfo));
52 }
53
54 /* CMS wrappers round generalised stream and MIME routines */
55
56 int i2d_CMS_bio_stream(BIO *out, CMS_ContentInfo *cms, BIO *in, int flags)
57 {
58     return i2d_ASN1_bio_stream(out, (ASN1_VALUE *)cms, in, flags,
59                                ASN1_ITEM_rptr(CMS_ContentInfo));
60 }
61
62 int PEM_write_bio_CMS_stream(BIO *out, CMS_ContentInfo *cms, BIO *in,
63                              int flags)
64 {
65     return PEM_write_bio_ASN1_stream(out, (ASN1_VALUE *)cms, in, flags,
66                                      "CMS", ASN1_ITEM_rptr(CMS_ContentInfo));
67 }
68
69 int SMIME_write_CMS(BIO *bio, CMS_ContentInfo *cms, BIO *data, int flags)
70 {
71     STACK_OF(X509_ALGOR) *mdalgs;
72     int ctype_nid = OBJ_obj2nid(cms->contentType);
73     int econt_nid = OBJ_obj2nid(CMS_get0_eContentType(cms));
74     if (ctype_nid == NID_pkcs7_signed)
75         mdalgs = cms->d.signedData->digestAlgorithms;
76     else
77         mdalgs = NULL;
78
79     return SMIME_write_ASN1(bio, (ASN1_VALUE *)cms, data, flags,
80                             ctype_nid, econt_nid, mdalgs,
81                             ASN1_ITEM_rptr(CMS_ContentInfo));
82 }
83
84 CMS_ContentInfo *SMIME_read_CMS(BIO *bio, BIO **bcont)
85 {
86     return (CMS_ContentInfo *)SMIME_read_ASN1(bio, bcont,
87                                               ASN1_ITEM_rptr
88                                               (CMS_ContentInfo));
89 }