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diff --git a/src/lib/libcrypto/asn1/tasn_utl.c b/src/lib/libcrypto/asn1/tasn_utl.c
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1/* $OpenBSD: tasn_utl.c,v 1.11 2015/07/25 17:07:17 jsing Exp $ */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 2000.
4 */
5/* ====================================================================
6 * Copyright (c) 2000-2004 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 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59#include <stddef.h>
60#include <string.h>
61#include <openssl/asn1.h>
62#include <openssl/asn1t.h>
63#include <openssl/objects.h>
64#include <openssl/err.h>
65
66/* Utility functions for manipulating fields and offsets */
67
68/* Add 'offset' to 'addr' */
69#define offset2ptr(addr, offset) (void *)(((char *) addr) + offset)
70
71/* Given an ASN1_ITEM CHOICE type return
72 * the selector value
73 */
74
75int
76asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it)
77{
78 int *sel = offset2ptr(*pval, it->utype);
79 return *sel;
80}
81
82/* Given an ASN1_ITEM CHOICE type set
83 * the selector value, return old value.
84 */
85
86int
87asn1_set_choice_selector(ASN1_VALUE **pval, int value, const ASN1_ITEM *it)
88{
89 int *sel, ret;
90 sel = offset2ptr(*pval, it->utype);
91 ret = *sel;
92 *sel = value;
93 return ret;
94}
95
96/* Do reference counting. The value 'op' decides what to do.
97 * if it is +1 then the count is incremented. If op is 0 count is
98 * set to 1. If op is -1 count is decremented and the return value
99 * is the current refrence count or 0 if no reference count exists.
100 */
101
102int
103asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it)
104{
105 const ASN1_AUX *aux;
106 int *lck, ret;
107
108 if ((it->itype != ASN1_ITYPE_SEQUENCE) &&
109 (it->itype != ASN1_ITYPE_NDEF_SEQUENCE))
110 return 0;
111 aux = it->funcs;
112 if (!aux || !(aux->flags & ASN1_AFLG_REFCOUNT))
113 return 0;
114 lck = offset2ptr(*pval, aux->ref_offset);
115 if (op == 0) {
116 *lck = 1;
117 return 1;
118 }
119 ret = CRYPTO_add(lck, op, aux->ref_lock);
120 return ret;
121}
122
123static ASN1_ENCODING *
124asn1_get_enc_ptr(ASN1_VALUE **pval, const ASN1_ITEM *it)
125{
126 const ASN1_AUX *aux;
127
128 if (!pval || !*pval)
129 return NULL;
130 aux = it->funcs;
131 if (!aux || !(aux->flags & ASN1_AFLG_ENCODING))
132 return NULL;
133 return offset2ptr(*pval, aux->enc_offset);
134}
135
136void
137asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it)
138{
139 ASN1_ENCODING *enc;
140
141 enc = asn1_get_enc_ptr(pval, it);
142 if (enc) {
143 enc->enc = NULL;
144 enc->len = 0;
145 enc->modified = 1;
146 }
147}
148
149void
150asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
151{
152 ASN1_ENCODING *enc;
153
154 enc = asn1_get_enc_ptr(pval, it);
155 if (enc) {
156 free(enc->enc);
157 enc->enc = NULL;
158 enc->len = 0;
159 enc->modified = 1;
160 }
161}
162
163int
164asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen,
165 const ASN1_ITEM *it)
166{
167 ASN1_ENCODING *enc;
168
169 enc = asn1_get_enc_ptr(pval, it);
170 if (!enc)
171 return 1;
172
173 free(enc->enc);
174 enc->enc = malloc(inlen);
175 if (!enc->enc)
176 return 0;
177 memcpy(enc->enc, in, inlen);
178 enc->len = inlen;
179 enc->modified = 0;
180
181 return 1;
182}
183
184int
185asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval,
186 const ASN1_ITEM *it)
187{
188 ASN1_ENCODING *enc;
189
190 enc = asn1_get_enc_ptr(pval, it);
191 if (!enc || enc->modified)
192 return 0;
193 if (out) {
194 memcpy(*out, enc->enc, enc->len);
195 *out += enc->len;
196 }
197 if (len)
198 *len = enc->len;
199 return 1;
200}
201
202/* Given an ASN1_TEMPLATE get a pointer to a field */
203ASN1_VALUE **
204asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
205{
206 ASN1_VALUE **pvaltmp;
207
208 if (tt->flags & ASN1_TFLG_COMBINE)
209 return pval;
210 pvaltmp = offset2ptr(*pval, tt->offset);
211 /* NOTE for BOOLEAN types the field is just a plain
212 * int so we can't return int **, so settle for
213 * (int *).
214 */
215 return pvaltmp;
216}
217
218/* Handle ANY DEFINED BY template, find the selector, look up
219 * the relevant ASN1_TEMPLATE in the table and return it.
220 */
221
222const ASN1_TEMPLATE *
223asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, int nullerr)
224{
225 const ASN1_ADB *adb;
226 const ASN1_ADB_TABLE *atbl;
227 long selector;
228 ASN1_VALUE **sfld;
229 int i;
230
231 if (!(tt->flags & ASN1_TFLG_ADB_MASK))
232 return tt;
233
234 /* Else ANY DEFINED BY ... get the table */
235 adb = (const ASN1_ADB *)tt->item;
236
237 /* Get the selector field */
238 sfld = offset2ptr(*pval, adb->offset);
239
240 /* Check if NULL */
241 if (!sfld) {
242 if (!adb->null_tt)
243 goto err;
244 return adb->null_tt;
245 }
246
247 /* Convert type to a long:
248 * NB: don't check for NID_undef here because it
249 * might be a legitimate value in the table
250 */
251 if (tt->flags & ASN1_TFLG_ADB_OID)
252 selector = OBJ_obj2nid((ASN1_OBJECT *)*sfld);
253 else
254 selector = ASN1_INTEGER_get((ASN1_INTEGER *)*sfld);
255
256 /* Try to find matching entry in table
257 * Maybe should check application types first to
258 * allow application override? Might also be useful
259 * to have a flag which indicates table is sorted and
260 * we can do a binary search. For now stick to a
261 * linear search.
262 */
263
264 for (atbl = adb->tbl, i = 0; i < adb->tblcount; i++, atbl++)
265 if (atbl->value == selector)
266 return &atbl->tt;
267
268 /* FIXME: need to search application table too */
269
270 /* No match, return default type */
271 if (!adb->default_tt)
272 goto err;
273 return adb->default_tt;
274
275err:
276 /* FIXME: should log the value or OID of unsupported type */
277 if (nullerr)
278 ASN1err(ASN1_F_ASN1_DO_ADB,
279 ASN1_R_UNSUPPORTED_ANY_DEFINED_BY_TYPE);
280 return NULL;
281}
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