1 /* $OpenBSD: tasn_utl.c,v 1.10 2014/06/12 15:49:27 deraadt Exp $ */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2000-2004 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
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34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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
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45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
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).
61 #include <openssl/asn1.h>
62 #include <openssl/asn1t.h>
63 #include <openssl/objects.h>
64 #include <openssl/err.h>
66 /* Utility functions for manipulating fields and offsets */
68 /* Add 'offset' to 'addr' */
69 #define offset2ptr(addr, offset) (void *)(((char *) addr) + offset)
71 /* Given an ASN1_ITEM CHOICE type return
76 asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it)
78 int *sel = offset2ptr(*pval, it->utype);
82 /* Given an ASN1_ITEM CHOICE type set
83 * the selector value, return old value.
87 asn1_set_choice_selector(ASN1_VALUE **pval, int value, const ASN1_ITEM *it)
90 sel = offset2ptr(*pval, it->utype);
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.
103 asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it)
108 if ((it->itype != ASN1_ITYPE_SEQUENCE) &&
109 (it->itype != ASN1_ITYPE_NDEF_SEQUENCE))
112 if (!aux || !(aux->flags & ASN1_AFLG_REFCOUNT))
114 lck = offset2ptr(*pval, aux->ref_offset);
119 ret = CRYPTO_add(lck, op, aux->ref_lock);
123 static ASN1_ENCODING *
124 asn1_get_enc_ptr(ASN1_VALUE **pval, const ASN1_ITEM *it)
131 if (!aux || !(aux->flags & ASN1_AFLG_ENCODING))
133 return offset2ptr(*pval, aux->enc_offset);
137 asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it)
141 enc = asn1_get_enc_ptr(pval, it);
150 asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
154 enc = asn1_get_enc_ptr(pval, it);
164 asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen,
169 enc = asn1_get_enc_ptr(pval, it);
174 enc->enc = malloc(inlen);
177 memcpy(enc->enc, in, inlen);
185 asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval,
190 enc = asn1_get_enc_ptr(pval, it);
191 if (!enc || enc->modified)
194 memcpy(*out, enc->enc, enc->len);
202 /* Given an ASN1_TEMPLATE get a pointer to a field */
204 asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
206 ASN1_VALUE **pvaltmp;
208 if (tt->flags & ASN1_TFLG_COMBINE)
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
218 /* Handle ANY DEFINED BY template, find the selector, look up
219 * the relevant ASN1_TEMPLATE in the table and return it.
222 const ASN1_TEMPLATE *
223 asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, int nullerr)
226 const ASN1_ADB_TABLE *atbl;
231 if (!(tt->flags & ASN1_TFLG_ADB_MASK))
234 /* Else ANY DEFINED BY ... get the table */
235 adb = (const ASN1_ADB *)tt->item;
237 /* Get the selector field */
238 sfld = offset2ptr(*pval, adb->offset);
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
251 if (tt->flags & ASN1_TFLG_ADB_OID)
252 selector = OBJ_obj2nid((ASN1_OBJECT *)*sfld);
254 selector = ASN1_INTEGER_get((ASN1_INTEGER *)*sfld);
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
264 for (atbl = adb->tbl, i = 0; i < adb->tblcount; i++, atbl++)
265 if (atbl->value == selector)
268 /* FIXME: need to search application table too */
270 /* No match, return default type */
271 if (!adb->default_tt)
273 return adb->default_tt;
276 /* FIXME: should log the value or OID of unsupported type */
278 ASN1err(ASN1_F_ASN1_DO_ADB,
279 ASN1_R_UNSUPPORTED_ANY_DEFINED_BY_TYPE);