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bio_ndef.c

Absolute File Name:/home/opencoverage/opencoverage/guest-scripts/libressl/src/crypto/asn1/bio_ndef.c
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1/* $OpenBSD: bio_ndef.c,v 1.10 2017/01/29 17:49:22 beck Exp $ */-
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL-
3 * project.-
4 */-
5/* ====================================================================-
6 * Copyright (c) 2008 The OpenSSL Project. All rights reserved.-
7 *-
8 * Redistribution and use in source and binary forms, with or without-
9 * modification, are permitted provided that the following conditions-
10 * are met:-
11 *-
12 * 1. Redistributions of source code must retain the above copyright-
13 * notice, this list of conditions and the following disclaimer.-
14 *-
15 * 2. Redistributions in binary form must reproduce the above copyright-
16 * notice, this list of conditions and the following disclaimer in-
17 * the documentation and/or other materials provided with the-
18 * distribution.-
19 *-
20 * 3. All advertising materials mentioning features or use of this-
21 * software must display the following acknowledgment:-
22 * "This product includes software developed by the OpenSSL Project-
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"-
24 *-
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to-
26 * endorse or promote products derived from this software without-
27 * prior written permission. For written permission, please contact-
28 * licensing@OpenSSL.org.-
29 *-
30 * 5. Products derived from this software may not be called "OpenSSL"-
31 * nor may "OpenSSL" appear in their names without prior written-
32 * permission of the OpenSSL Project.-
33 *-
34 * 6. Redistributions of any form whatsoever must retain the following-
35 * acknowledgment:-
36 * "This product includes software developed by the OpenSSL Project-
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"-
38 *-
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY-
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE-
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR-
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR-
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,-
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT-
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;-
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)-
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,-
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)-
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED-
50 * OF THE POSSIBILITY OF SUCH DAMAGE.-
51 * ====================================================================-
52 *-
53 */-
54-
55#include <openssl/asn1.h>-
56#include <openssl/asn1t.h>-
57#include <openssl/bio.h>-
58#include <openssl/err.h>-
59-
60#include <stdio.h>-
61-
62/* Experimental NDEF ASN1 BIO support routines */-
63-
64/* The usage is quite simple, initialize an ASN1 structure,-
65 * get a BIO from it then any data written through the BIO-
66 * will end up translated to approptiate format on the fly.-
67 * The data is streamed out and does *not* need to be-
68 * all held in memory at once.-
69 *-
70 * When the BIO is flushed the output is finalized and any-
71 * signatures etc written out.-
72 *-
73 * The BIO is a 'proper' BIO and can handle non blocking I/O-
74 * correctly.-
75 *-
76 * The usage is simple. The implementation is *not*...-
77 */-
78-
79/* BIO support data stored in the ASN1 BIO ex_arg */-
80-
81typedef struct ndef_aux_st {-
82 /* ASN1 structure this BIO refers to */-
83 ASN1_VALUE *val;-
84 const ASN1_ITEM *it;-
85 /* Top of the BIO chain */-
86 BIO *ndef_bio;-
87 /* Output BIO */-
88 BIO *out;-
89 /* Boundary where content is inserted */-
90 unsigned char **boundary;-
91 /* DER buffer start */-
92 unsigned char *derbuf;-
93} NDEF_SUPPORT;-
94-
95static int ndef_prefix(BIO *b, unsigned char **pbuf, int *plen, void *parg);-
96static int ndef_prefix_free(BIO *b, unsigned char **pbuf, int *plen, void *parg);-
97static int ndef_suffix(BIO *b, unsigned char **pbuf, int *plen, void *parg);-
98static int ndef_suffix_free(BIO *b, unsigned char **pbuf, int *plen, void *parg);-
99-
100BIO *-
101BIO_new_NDEF(BIO *out, ASN1_VALUE *val, const ASN1_ITEM *it)-
102{-
103 NDEF_SUPPORT *ndef_aux = NULL;-
104 BIO *asn_bio = NULL;-
105 const ASN1_AUX *aux = it->funcs;-
106 ASN1_STREAM_ARG sarg;-
107-
108 if (!aux || !aux->asn1_cb) {
!auxDescription
TRUEnever evaluated
FALSEnever evaluated
!aux->asn1_cbDescription
TRUEnever evaluated
FALSEnever evaluated
0
109 ASN1error(ASN1_R_STREAMING_NOT_SUPPORTED);-
110 return NULL;
never executed: return ((void *)0) ;
0
111 }-
112 ndef_aux = malloc(sizeof(NDEF_SUPPORT));-
113 asn_bio = BIO_new(BIO_f_asn1());-
114-
115 /* ASN1 bio needs to be next to output BIO */-
116-
117 out = BIO_push(asn_bio, out);-
118-
119 if (!ndef_aux || !asn_bio || !out)
!ndef_auxDescription
TRUEnever evaluated
FALSEnever evaluated
!asn_bioDescription
TRUEnever evaluated
FALSEnever evaluated
!outDescription
TRUEnever evaluated
FALSEnever evaluated
0
120 goto err;
never executed: goto err;
0
121-
122 BIO_asn1_set_prefix(asn_bio, ndef_prefix, ndef_prefix_free);-
123 BIO_asn1_set_suffix(asn_bio, ndef_suffix, ndef_suffix_free);-
124-
125 /* Now let callback prepend any digest, cipher etc BIOs-
126 * ASN1 structure needs.-
127 */-
128-
129 sarg.out = out;-
130 sarg.ndef_bio = NULL;-
131 sarg.boundary = NULL;-
132-
133 if (aux->asn1_cb(ASN1_OP_STREAM_PRE, &val, it, &sarg) <= 0)
aux->asn1_cb(1...t, &sarg) <= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
134 goto err;
never executed: goto err;
0
135-
136 ndef_aux->val = val;-
137 ndef_aux->it = it;-
138 ndef_aux->ndef_bio = sarg.ndef_bio;-
139 ndef_aux->boundary = sarg.boundary;-
140 ndef_aux->out = out;-
141-
142 BIO_ctrl(asn_bio, BIO_C_SET_EX_ARG, 0, ndef_aux);-
143-
144 return sarg.ndef_bio;
never executed: return sarg.ndef_bio;
0
145-
146err:-
147 BIO_free(asn_bio);-
148 free(ndef_aux);-
149 return NULL;
never executed: return ((void *)0) ;
0
150}-
151-
152static int-
153ndef_prefix(BIO *b, unsigned char **pbuf, int *plen, void *parg)-
154{-
155 NDEF_SUPPORT *ndef_aux;-
156 unsigned char *p;-
157 int derlen;-
158-
159 if (!parg)
!pargDescription
TRUEnever evaluated
FALSEnever evaluated
0
160 return 0;
never executed: return 0;
0
161-
162 ndef_aux = *(NDEF_SUPPORT **)parg;-
163-
164 derlen = ASN1_item_ndef_i2d(ndef_aux->val, NULL, ndef_aux->it);-
165 p = malloc(derlen);-
166 ndef_aux->derbuf = p;-
167 *pbuf = p;-
168 derlen = ASN1_item_ndef_i2d(ndef_aux->val, &p, ndef_aux->it);-
169-
170 if (!*ndef_aux->boundary)
!*ndef_aux->boundaryDescription
TRUEnever evaluated
FALSEnever evaluated
0
171 return 0;
never executed: return 0;
0
172-
173 *plen = *ndef_aux->boundary - *pbuf;-
174-
175 return 1;
never executed: return 1;
0
176}-
177-
178static int-
179ndef_prefix_free(BIO *b, unsigned char **pbuf, int *plen, void *parg)-
180{-
181 NDEF_SUPPORT *ndef_aux;-
182-
183 if (!parg)
!pargDescription
TRUEnever evaluated
FALSEnever evaluated
0
184 return 0;
never executed: return 0;
0
185-
186 ndef_aux = *(NDEF_SUPPORT **)parg;-
187-
188 free(ndef_aux->derbuf);-
189-
190 ndef_aux->derbuf = NULL;-
191 *pbuf = NULL;-
192 *plen = 0;-
193 return 1;
never executed: return 1;
0
194}-
195-
196static int-
197ndef_suffix_free(BIO *b, unsigned char **pbuf, int *plen, void *parg)-
198{-
199 NDEF_SUPPORT **pndef_aux = (NDEF_SUPPORT **)parg;-
200 if (!ndef_prefix_free(b, pbuf, plen, parg))
!ndef_prefix_f...f, plen, parg)Description
TRUEnever evaluated
FALSEnever evaluated
0
201 return 0;
never executed: return 0;
0
202 free(*pndef_aux);-
203 *pndef_aux = NULL;-
204 return 1;
never executed: return 1;
0
205}-
206-
207static int-
208ndef_suffix(BIO *b, unsigned char **pbuf, int *plen, void *parg)-
209{-
210 NDEF_SUPPORT *ndef_aux;-
211 unsigned char *p;-
212 int derlen;-
213 const ASN1_AUX *aux;-
214 ASN1_STREAM_ARG sarg;-
215-
216 if (!parg)
!pargDescription
TRUEnever evaluated
FALSEnever evaluated
0
217 return 0;
never executed: return 0;
0
218-
219 ndef_aux = *(NDEF_SUPPORT **)parg;-
220-
221 aux = ndef_aux->it->funcs;-
222-
223 /* Finalize structures */-
224 sarg.ndef_bio = ndef_aux->ndef_bio;-
225 sarg.out = ndef_aux->out;-
226 sarg.boundary = ndef_aux->boundary;-
227 if (aux->asn1_cb(ASN1_OP_STREAM_POST,
aux->asn1_cb(1...t, &sarg) <= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
228 &ndef_aux->val, ndef_aux->it, &sarg) <= 0)
aux->asn1_cb(1...t, &sarg) <= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
229 return 0;
never executed: return 0;
0
230-
231 derlen = ASN1_item_ndef_i2d(ndef_aux->val, NULL, ndef_aux->it);-
232 p = malloc(derlen);-
233 ndef_aux->derbuf = p;-
234 *pbuf = p;-
235 derlen = ASN1_item_ndef_i2d(ndef_aux->val, &p, ndef_aux->it);-
236-
237 if (!*ndef_aux->boundary)
!*ndef_aux->boundaryDescription
TRUEnever evaluated
FALSEnever evaluated
0
238 return 0;
never executed: return 0;
0
239 *pbuf = *ndef_aux->boundary;-
240 *plen = derlen - (*ndef_aux->boundary - ndef_aux->derbuf);-
241-
242 return 1;
never executed: return 1;
0
243}-
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