2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2000 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)
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 * ====================================================================
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).
62 #include <openssl/asn1.h>
63 #include <openssl/asn1t.h>
64 #include <openssl/objects.h>
65 #include <openssl/err.h>
67 /* Utility functions for manipulating fields and offsets */
69 /* Add 'offset' to 'addr' */
70 #define offset2ptr(addr, offset) (void *)(((char *) addr) + offset)
72 /* Given an ASN1_ITEM CHOICE type return
76 int 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.
86 int asn1_set_choice_selector(ASN1_VALUE **pval, int value, const ASN1_ITEM *it)
89 sel = offset2ptr(*pval, it->utype);
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.
101 int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it)
105 if((it->itype != ASN1_ITYPE_SEQUENCE)
106 && (it->itype != ASN1_ITYPE_NDEF_SEQUENCE)) return 0;
108 if(!aux || !(aux->flags & ASN1_AFLG_REFCOUNT)) return 0;
109 lck = offset2ptr(*pval, aux->ref_offset);
114 ret = CRYPTO_add(lck, op, aux->ref_lock);
116 fprintf(stderr, "%s: Reference Count: %d\n", it->sname, *lck);
120 fprintf(stderr, "%s, bad reference count\n", it->sname);
125 static ASN1_ENCODING *asn1_get_enc_ptr(ASN1_VALUE **pval, const ASN1_ITEM *it)
128 if(!pval || !*pval) return NULL;
130 if(!aux || !(aux->flags & ASN1_AFLG_ENCODING)) return NULL;
131 return offset2ptr(*pval, aux->enc_offset);
134 void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it)
137 enc = asn1_get_enc_ptr(pval, it);
145 void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
148 enc = asn1_get_enc_ptr(pval, it);
150 if(enc->enc) OPENSSL_free(enc->enc);
157 int asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen, const ASN1_ITEM *it)
160 enc = asn1_get_enc_ptr(pval, it);
163 if(enc->enc) OPENSSL_free(enc->enc);
164 enc->enc = OPENSSL_malloc(inlen);
165 if(!enc->enc) return 0;
166 memcpy(enc->enc, in, inlen);
173 int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval, const ASN1_ITEM *it)
176 enc = asn1_get_enc_ptr(pval, it);
177 if(!enc || enc->modified) return 0;
179 memcpy(*out, enc->enc, enc->len);
182 if(len) *len = enc->len;
186 /* Given an ASN1_TEMPLATE get a pointer to a field */
187 ASN1_VALUE ** asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
189 ASN1_VALUE **pvaltmp;
190 if(tt->flags & ASN1_TFLG_COMBINE) return pval;
191 pvaltmp = offset2ptr(*pval, tt->offset);
192 /* NOTE for BOOLEAN types the field is just a plain
193 * int so we can't return int **, so settle for
199 /* Handle ANY DEFINED BY template, find the selector, look up
200 * the relevant ASN1_TEMPLATE in the table and return it.
203 const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, int nullerr)
206 const ASN1_ADB_TABLE *atbl;
210 if(!(tt->flags & ASN1_TFLG_ADB_MASK)) return tt;
212 /* Else ANY DEFINED BY ... get the table */
213 adb = ASN1_ADB_ptr(tt->item);
215 /* Get the selector field */
216 sfld = offset2ptr(*pval, adb->offset);
220 if(!adb->null_tt) goto err;
224 /* Convert type to a long:
225 * NB: don't check for NID_undef here because it
226 * might be a legitimate value in the table
228 if(tt->flags & ASN1_TFLG_ADB_OID)
229 selector = OBJ_obj2nid((ASN1_OBJECT *)*sfld);
231 selector = ASN1_INTEGER_get((ASN1_INTEGER *)*sfld);
233 /* Try to find matching entry in table
234 * Maybe should check application types first to
235 * allow application override? Might also be useful
236 * to have a flag which indicates table is sorted and
237 * we can do a binary search. For now stick to a
241 for(atbl = adb->tbl, i = 0; i < adb->tblcount; i++, atbl++)
242 if(atbl->value == selector) return &atbl->tt;
244 /* FIXME: need to search application table too */
246 /* No match, return default type */
247 if(!adb->default_tt) goto err;
248 return adb->default_tt;
251 /* FIXME: should log the value or OID of unsupported type */
252 if(nullerr) ASN1err(ASN1_F_ASN1_DO_ADB, ASN1_R_UNSUPPORTED_ANY_DEFINED_BY_TYPE);