1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
/* bio_ndef.c */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project.
*/
/* ====================================================================
* Copyright (c) 2008 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
*/
#include <openssl/asn1.h>
#include <openssl/asn1t.h>
#include <openssl/bio.h>
#include <openssl/err.h>
#include <stdio.h>
/* Experimental NDEF ASN1 BIO support routines */
/* The usage is quite simple, initialize an ASN1 structure,
* get a BIO from it then any data written through the BIO
* will end up translated to approptiate format on the fly.
* The data is streamed out and does *not* need to be
* all held in memory at once.
*
* When the BIO is flushed the output is finalized and any
* signatures etc written out.
*
* The BIO is a 'proper' BIO and can handle non blocking I/O
* correctly.
*
* The usage is simple. The implementation is *not*...
*/
/* BIO support data stored in the ASN1 BIO ex_arg */
typedef struct ndef_aux_st
{
/* ASN1 structure this BIO refers to */
ASN1_VALUE *val;
const ASN1_ITEM *it;
/* Top of the BIO chain */
BIO *ndef_bio;
/* Output BIO */
BIO *out;
/* Boundary where content is inserted */
unsigned char **boundary;
/* DER buffer start */
unsigned char *derbuf;
} NDEF_SUPPORT;
static int ndef_prefix(BIO *b, unsigned char **pbuf, int *plen, void *parg);
static int ndef_prefix_free(BIO *b, unsigned char **pbuf, int *plen, void *parg);
static int ndef_suffix(BIO *b, unsigned char **pbuf, int *plen, void *parg);
static int ndef_suffix_free(BIO *b, unsigned char **pbuf, int *plen, void *parg);
BIO *BIO_new_NDEF(BIO *out, ASN1_VALUE *val, const ASN1_ITEM *it)
{
NDEF_SUPPORT *ndef_aux = NULL;
BIO *asn_bio = NULL;
const ASN1_AUX *aux = it->funcs;
ASN1_STREAM_ARG sarg;
if (!aux || !aux->asn1_cb)
{
ASN1err(ASN1_F_BIO_NEW_NDEF, ASN1_R_STREAMING_NOT_SUPPORTED);
return NULL;
}
ndef_aux = OPENSSL_malloc(sizeof(NDEF_SUPPORT));
asn_bio = BIO_new(BIO_f_asn1());
/* ASN1 bio needs to be next to output BIO */
out = BIO_push(asn_bio, out);
if (!ndef_aux || !asn_bio || !out)
goto err;
BIO_asn1_set_prefix(asn_bio, ndef_prefix, ndef_prefix_free);
BIO_asn1_set_suffix(asn_bio, ndef_suffix, ndef_suffix_free);
/* Now let callback prepend any digest, cipher etc BIOs
* ASN1 structure needs.
*/
sarg.out = out;
sarg.ndef_bio = NULL;
sarg.boundary = NULL;
if (aux->asn1_cb(ASN1_OP_STREAM_PRE, &val, it, &sarg) <= 0)
goto err;
ndef_aux->val = val;
ndef_aux->it = it;
ndef_aux->ndef_bio = sarg.ndef_bio;
ndef_aux->boundary = sarg.boundary;
ndef_aux->out = out;
BIO_ctrl(asn_bio, BIO_C_SET_EX_ARG, 0, ndef_aux);
return sarg.ndef_bio;
err:
if (asn_bio)
BIO_free(asn_bio);
if (ndef_aux)
OPENSSL_free(ndef_aux);
return NULL;
}
static int ndef_prefix(BIO *b, unsigned char **pbuf, int *plen, void *parg)
{
NDEF_SUPPORT *ndef_aux;
unsigned char *p;
int derlen;
if (!parg)
return 0;
ndef_aux = *(NDEF_SUPPORT **)parg;
derlen = ASN1_item_ndef_i2d(ndef_aux->val, NULL, ndef_aux->it);
p = OPENSSL_malloc(derlen);
ndef_aux->derbuf = p;
*pbuf = p;
derlen = ASN1_item_ndef_i2d(ndef_aux->val, &p, ndef_aux->it);
if (!*ndef_aux->boundary)
return 0;
*plen = *ndef_aux->boundary - *pbuf;
return 1;
}
static int ndef_prefix_free(BIO *b, unsigned char **pbuf, int *plen, void *parg)
{
NDEF_SUPPORT *ndef_aux;
if (!parg)
return 0;
ndef_aux = *(NDEF_SUPPORT **)parg;
if (ndef_aux->derbuf)
OPENSSL_free(ndef_aux->derbuf);
ndef_aux->derbuf = NULL;
*pbuf = NULL;
*plen = 0;
return 1;
}
static int ndef_suffix_free(BIO *b, unsigned char **pbuf, int *plen, void *parg)
{
NDEF_SUPPORT **pndef_aux = (NDEF_SUPPORT **)parg;
if (!ndef_prefix_free(b, pbuf, plen, parg))
return 0;
OPENSSL_free(*pndef_aux);
*pndef_aux = NULL;
return 1;
}
static int ndef_suffix(BIO *b, unsigned char **pbuf, int *plen, void *parg)
{
NDEF_SUPPORT *ndef_aux;
unsigned char *p;
int derlen;
const ASN1_AUX *aux;
ASN1_STREAM_ARG sarg;
if (!parg)
return 0;
ndef_aux = *(NDEF_SUPPORT **)parg;
aux = ndef_aux->it->funcs;
/* Finalize structures */
sarg.ndef_bio = ndef_aux->ndef_bio;
sarg.out = ndef_aux->out;
sarg.boundary = ndef_aux->boundary;
if (aux->asn1_cb(ASN1_OP_STREAM_POST,
&ndef_aux->val, ndef_aux->it, &sarg) <= 0)
return 0;
derlen = ASN1_item_ndef_i2d(ndef_aux->val, NULL, ndef_aux->it);
p = OPENSSL_malloc(derlen);
ndef_aux->derbuf = p;
*pbuf = p;
derlen = ASN1_item_ndef_i2d(ndef_aux->val, &p, ndef_aux->it);
if (!*ndef_aux->boundary)
return 0;
*pbuf = *ndef_aux->boundary;
*plen = derlen - (*ndef_aux->boundary - ndef_aux->derbuf);
return 1;
}
|
