1 /* $OpenBSD: tasn_utl.c,v 1.12 2017/01/29 17:49:22 beck 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
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
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
32 * permission of the OpenSSL Project.
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
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)
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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 * ====================================================================
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 ASN1error(ASN1_R_UNSUPPORTED_ANY_DEFINED_BY_TYPE
);