crypto/asn1/tasn_new.c

   1 /* tasn_new.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 <openssl/asn1.h>
  62 #include <openssl/objects.h>
  63 #include <openssl/err.h>
  64 #include <openssl/asn1t.h>
  65
  66 static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it, int combine);
  67 static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
  68 static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
  69 void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
  70
  71 ASN1_VALUE *ASN1_item_new(const ASN1_ITEM *it)
  72 {
  73         ASN1_VALUE *ret = NULL;
  74         if(ASN1_item_ex_new(&ret, it) > 0) return ret;
  75         return NULL;
  76 }
  77
  78 /* Allocate an ASN1 structure */
  79
  80 int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
  81 {
  82         return asn1_item_ex_combine_new(pval, it, 0);
  83 }
  84
  85 static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it, int combine)
  86 {
  87         const ASN1_TEMPLATE *tt = NULL;
  88         const ASN1_COMPAT_FUNCS *cf;
  89         const ASN1_EXTERN_FUNCS *ef;
  90         const ASN1_AUX *aux = it->funcs;
  91         ASN1_aux_cb *asn1_cb;
  92         ASN1_VALUE **pseqval;
  93         int i;
  94         if(aux && aux->asn1_cb) asn1_cb = aux->asn1_cb;
  95         else asn1_cb = 0;
  96
  97         if(!combine) *pval = NULL;
  98
  99         switch(it->itype) {
 100
 101                 case ASN1_ITYPE_EXTERN:
 102                 ef = it->funcs;
 103                 if(ef && ef->asn1_ex_new) {
 104                         if(!ef->asn1_ex_new(pval, it))
 105                                 goto memerr;
 106                 }
 107                 break;
 108
 109                 case ASN1_ITYPE_COMPAT:
 110                 cf = it->funcs;
 111                 if(cf && cf->asn1_new) {
 112                         *pval = cf->asn1_new();
 113                         if(!*pval) goto memerr;
 114                 }
 115                 break;
 116
 117                 case ASN1_ITYPE_PRIMITIVE:
 118                 if(it->templates) {
 119                         if(!ASN1_template_new(pval, it->templates))
 120                                 goto memerr;
 121                 } else {
 122                         if(!ASN1_primitive_new(pval, it))
 123                                 goto memerr;
 124                 }
 125                 break;
 126
 127                 case ASN1_ITYPE_MSTRING:
 128                 if(!ASN1_primitive_new(pval, it))
 129                                 goto memerr;
 130                 break;
 131
 132                 case ASN1_ITYPE_CHOICE:
 133                 if(asn1_cb) {
 134                         i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
 135                         if(!i) goto auxerr;
 136                         if(i==2) return 1;
 137                 }
 138                 if(!combine) {
 139                         *pval = OPENSSL_malloc(it->size);
 140                         if(!*pval) goto memerr;
 141                         memset(*pval, 0, it->size);
 142                 }
 143                 asn1_set_choice_selector(pval, -1, it);
 144                 if(asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
 145                                 goto auxerr;
 146                 break;
 147
 148                 case ASN1_ITYPE_SEQUENCE:
 149                 if(asn1_cb) {
 150                         i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
 151                         if(!i) goto auxerr;
 152                         if(i==2) return 1;
 153                 }
 154                 if(!combine) {
 155                         *pval = OPENSSL_malloc(it->size);
 156                         if(!*pval) goto memerr;
 157                         memset(*pval, 0, it->size);
 158                         asn1_do_lock(pval, 0, it);
 159                         asn1_enc_init(pval, it);
 160                 }
 161                 for(i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
 162                         pseqval = asn1_get_field_ptr(pval, tt);
 163                         if(!ASN1_template_new(pseqval, tt)) goto memerr;
 164                 }
 165                 if(asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
 166                                 goto auxerr;
 167                 break;
 168         }
 169         return 1;
 170
 171         memerr:
 172         ASN1err(ASN1_F_ASN1_ITEM_NEW, ERR_R_MALLOC_FAILURE);
 173         return 0;
 174
 175         auxerr:
 176         ASN1err(ASN1_F_ASN1_ITEM_NEW, ASN1_R_AUX_ERROR);
 177         ASN1_item_ex_free(pval, it);
 178         return 0;
 179
 180 }
 181
 182 static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
 183 {
 184         const ASN1_EXTERN_FUNCS *ef;
 185
 186         switch(it->itype) {
 187
 188                 case ASN1_ITYPE_EXTERN:
 189                 ef = it->funcs;
 190                 if(ef && ef->asn1_ex_clear)
 191                         ef->asn1_ex_clear(pval, it);
 192                 else *pval = NULL;
 193                 break;
 194
 195
 196                 case ASN1_ITYPE_PRIMITIVE:
 197                 if(it->templates)
 198                         asn1_template_clear(pval, it->templates);
 199                 else
 200                         asn1_primitive_clear(pval, it);
 201                 break;
 202
 203                 case ASN1_ITYPE_MSTRING:
 204                 asn1_primitive_clear(pval, it);
 205                 break;
 206
 207                 case ASN1_ITYPE_COMPAT:
 208                 case ASN1_ITYPE_CHOICE:
 209                 case ASN1_ITYPE_SEQUENCE:
 210                 *pval = NULL;
 211                 break;
 212         }
 213 }
 214
 215
 216 int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
 217 {
 218         const ASN1_ITEM *it = tt->item;
 219         if(tt->flags & ASN1_TFLG_OPTIONAL) {
 220                 asn1_template_clear(pval, tt);
 221                 return 1;
 222         }
 223         /* If ANY DEFINED BY nothing to do */
 224
 225         if(tt->flags & ASN1_TFLG_ADB_MASK) {
 226                 *pval = NULL;
 227                 return 1;
 228         }
 229         /* If SET OF or SEQUENCE OF, its a STACK */
 230         if(tt->flags & ASN1_TFLG_SK_MASK) {
 231                 STACK_OF(ASN1_VALUE) *skval;
 232                 skval = sk_ASN1_VALUE_new_null();
 233                 if(!skval) {
 234                         ASN1err(ASN1_F_ASN1_TEMPLATE_NEW, ERR_R_MALLOC_FAILURE);
 235                         return 0;
 236                 }
 237                 *pval = (ASN1_VALUE *)skval;
 238                 return 1;
 239         }
 240         /* Otherwise pass it back to the item routine */
 241         return asn1_item_ex_combine_new(pval, it, tt->flags & ASN1_TFLG_COMBINE);
 242 }
 243
 244 void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
 245 {
 246         /* If ADB or STACK just NULL the field */
 247         if(tt->flags & (ASN1_TFLG_ADB_MASK|ASN1_TFLG_SK_MASK))
 248                 *pval = NULL;
 249         else
 250                 asn1_item_clear(pval, tt->item);
 251 }
 252
 253
 254 /* NB: could probably combine most of the real XXX_new() behaviour and junk all the old
 255  * functions.
 256  */
 257
 258 int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
 259 {
 260         ASN1_TYPE *typ;
 261         int utype;
 262         const ASN1_PRIMITIVE_FUNCS *pf;
 263         pf = it->funcs;
 264         if(pf && pf->prim_new) return pf->prim_new(pval, it);
 265         if(!it || (it->itype == ASN1_ITYPE_MSTRING)) utype = -1;
 266         else utype = it->utype;
 267         switch(utype) {
 268                 case V_ASN1_OBJECT:
 269                 *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef);
 270                 return 1;
 271
 272                 case V_ASN1_BOOLEAN:
 273                 *(ASN1_BOOLEAN *)pval = it->size;
 274                 return 1;
 275
 276                 case V_ASN1_NULL:
 277                 *pval = (ASN1_VALUE *)1;
 278                 return 1;
 279
 280                 case V_ASN1_ANY:
 281                 typ = OPENSSL_malloc(sizeof(ASN1_TYPE));
 282                 if(!typ) return 0;
 283                 typ->value.ptr = NULL;
 284                 typ->type = -1;
 285                 *pval = (ASN1_VALUE *)typ;
 286                 break;
 287
 288                 default:
 289                 *pval = (ASN1_VALUE *)ASN1_STRING_type_new(utype);
 290                 break;
 291         }
 292         if(*pval) return 1;
 293         return 0;
 294 }
 295
 296 void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
 297 {
 298         int utype;
 299         const ASN1_PRIMITIVE_FUNCS *pf;
 300         pf = it->funcs;
 301         if(pf) {
 302                 if(pf->prim_clear)
 303                         pf->prim_clear(pval, it);
 304                 else
 305                         *pval = NULL;
 306                 return;
 307         }
 308         if(!it || (it->itype == ASN1_ITYPE_MSTRING)) utype = -1;
 309         else utype = it->utype;
 310         if(utype == V_ASN1_BOOLEAN)
 311                 *(ASN1_BOOLEAN *)pval = it->size;
 312         else *pval = NULL;
 313 }