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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/* tasn_utl.c */
2/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
3 * project 2000.
4 */
5/* ====================================================================
6 * Copyright (c) 2000 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
60#include <stddef.h>
61#include <string.h>
62#include <openssl/asn1.h>
63#include <openssl/asn1t.h>
64#include <openssl/objects.h>
65#include <openssl/err.h>
66
67/* Utility functions for manipulating fields and offsets */
68
69/* Add 'offset' to 'addr' */
70#define offset2ptr(addr, offset) (void *)(((char *) addr) + offset)
71
72/* Given an ASN1_ITEM CHOICE type return
73 * the selector value
74 */
75
76int asn1_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 asn1_set_choice_selector(ASN1_VALUE **pval, int value, const ASN1_ITEM *it)
87{
88 int *sel, ret;
89 sel = offset2ptr(*pval, it->utype);
90 ret = *sel;
91 *sel = value;
92 return ret;
93}
94
95/* Do reference counting. The value 'op' decides what to do.
96 * if it is +1 then the count is incremented. If op is 0 count is
97 * set to 1. If op is -1 count is decremented and the return value
98 * is the current refrence count or 0 if no reference count exists.
99 */
100
101int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it)
102{
103 const ASN1_AUX *aux;
104 int *lck, ret;
105 if(it->itype != ASN1_ITYPE_SEQUENCE) return 0;
106 aux = it->funcs;
107 if(!aux || !(aux->flags & ASN1_AFLG_REFCOUNT)) return 0;
108 lck = offset2ptr(*pval, aux->ref_offset);
109 if(op == 0) {
110 *lck = 1;
111 return 1;
112 }
113 ret = CRYPTO_add(lck, op, aux->ref_lock);
114#ifdef REF_PRINT
115 fprintf(stderr, "%s: Reference Count: %d\n", it->sname, *lck);
116#endif
117#ifdef REF_CHECK
118 if(ret < 0)
119 fprintf(stderr, "%s, bad reference count\n", it->sname);
120#endif
121 return ret;
122}
123
124static ASN1_ENCODING *asn1_get_enc_ptr(ASN1_VALUE **pval, const ASN1_ITEM *it)
125{
126 const ASN1_AUX *aux;
127 if(!pval || !*pval) return NULL;
128 aux = it->funcs;
129 if(!aux || !(aux->flags & ASN1_AFLG_ENCODING)) return NULL;
130 return offset2ptr(*pval, aux->enc_offset);
131}
132
133void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it)
134{
135 ASN1_ENCODING *enc;
136 enc = asn1_get_enc_ptr(pval, it);
137 if(enc) {
138 enc->enc = NULL;
139 enc->len = 0;
140 enc->modified = 1;
141 }
142}
143
144void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
145{
146 ASN1_ENCODING *enc;
147 enc = asn1_get_enc_ptr(pval, it);
148 if(enc) {
149 if(enc->enc) OPENSSL_free(enc->enc);
150 enc->enc = NULL;
151 enc->len = 0;
152 enc->modified = 1;
153 }
154}
155
156int asn1_enc_save(ASN1_VALUE **pval, unsigned char *in, int inlen, const ASN1_ITEM *it)
157{
158 ASN1_ENCODING *enc;
159 enc = asn1_get_enc_ptr(pval, it);
160 if(!enc) return 1;
161
162 if(enc->enc) OPENSSL_free(enc->enc);
163 enc->enc = OPENSSL_malloc(inlen);
164 if(!enc->enc) return 0;
165 memcpy(enc->enc, in, inlen);
166 enc->len = inlen;
167 enc->modified = 0;
168
169 return 1;
170}
171
172int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval, const ASN1_ITEM *it)
173{
174 ASN1_ENCODING *enc;
175 enc = asn1_get_enc_ptr(pval, it);
176 if(!enc || enc->modified) return 0;
177 if(out) {
178 memcpy(*out, enc->enc, enc->len);
179 *out += enc->len;
180 }
181 if(len) *len = enc->len;
182 return 1;
183}
184
185/* Given an ASN1_TEMPLATE get a pointer to a field */
186ASN1_VALUE ** asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
187{
188 ASN1_VALUE **pvaltmp;
189 if(tt->flags & ASN1_TFLG_COMBINE) return pval;
190 pvaltmp = offset2ptr(*pval, tt->offset);
191 /* NOTE for BOOLEAN types the field is just a plain
192 * int so we can't return int **, so settle for
193 * (int *).
194 */
195 return pvaltmp;
196}
197
198/* Handle ANY DEFINED BY template, find the selector, look up
199 * the relevant ASN1_TEMPLATE in the table and return it.
200 */
201
202const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, int nullerr)
203{
204 const ASN1_ADB *adb;
205 const ASN1_ADB_TABLE *atbl;
206 long selector;
207 ASN1_VALUE **sfld;
208 int i;
209 if(!(tt->flags & ASN1_TFLG_ADB_MASK)) return tt;
210
211 /* Else ANY DEFINED BY ... get the table */
212 adb = ASN1_ADB_ptr(tt->item);
213
214 /* Get the selector field */
215 sfld = offset2ptr(*pval, adb->offset);
216
217 /* Check if NULL */
218 if(!sfld) {
219 if(!adb->null_tt) goto err;
220 return adb->null_tt;
221 }
222
223 /* Convert type to a long:
224 * NB: don't check for NID_undef here because it
225 * might be a legitimate value in the table
226 */
227 if(tt->flags & ASN1_TFLG_ADB_OID)
228 selector = OBJ_obj2nid((ASN1_OBJECT *)*sfld);
229 else
230 selector = ASN1_INTEGER_get((ASN1_INTEGER *)*sfld);
231
232 /* Try to find matching entry in table
233 * Maybe should check application types first to
234 * allow application override? Might also be useful
235 * to have a flag which indicates table is sorted and
236 * we can do a binary search. For now stick to a
237 * linear search.
238 */
239
240 for(atbl = adb->tbl, i = 0; i < adb->tblcount; i++, atbl++)
241 if(atbl->value == selector) return &atbl->tt;
242
243 /* FIXME: need to search application table too */
244
245 /* No match, return default type */
246 if(!adb->default_tt) goto err;
247 return adb->default_tt;
248
249 err:
250 /* FIXME: should log the value or OID of unsupported type */
251 if(nullerr) ASN1err(ASN1_F_ASN1_DO_ADB, ASN1_R_UNSUPPORTED_ANY_DEFINED_BY_TYPE);
252 return NULL;
253}
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