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 #ifdef CRYPTO_MDEBUG
 100         if(it->sname) CRYPTO_push_info(it->sname);
 101 #endif
 102
 103         switch(it->itype) {
 104
 105                 case ASN1_ITYPE_EXTERN:
 106                 ef = it->funcs;
 107                 if(ef && ef->asn1_ex_new) {
 108                         if(!ef->asn1_ex_new(pval, it))
 109                                 goto memerr;
 110                 }
 111                 break;
 112
 113                 case ASN1_ITYPE_COMPAT:
 114                 cf = it->funcs;
 115                 if(cf && cf->asn1_new) {
 116                         *pval = cf->asn1_new();
 117                         if(!*pval) goto memerr;
 118                 }
 119                 break;
 120
 121                 case ASN1_ITYPE_PRIMITIVE:
 122                 if(it->templates) {
 123                         if(!ASN1_template_new(pval, it->templates))
 124                                 goto memerr;
 125                 } else {
 126                         if(!ASN1_primitive_new(pval, it))
 127                                 goto memerr;
 128                 }
 129                 break;
 130
 131                 case ASN1_ITYPE_MSTRING:
 132                 if(!ASN1_primitive_new(pval, it))
 133                                 goto memerr;
 134                 break;
 135
 136                 case ASN1_ITYPE_CHOICE:
 137                 if(asn1_cb) {
 138                         i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
 139                         if(!i) goto auxerr;
 140                         if(i==2) return 1;
 141                 }
 142                 if(!combine) {
 143                         *pval = OPENSSL_malloc(it->size);
 144                         if(!*pval) goto memerr;
 145                         memset(*pval, 0, it->size);
 146                 }
 147                 asn1_set_choice_selector(pval, -1, it);
 148                 if(asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
 149                                 goto auxerr;
 150                 break;
 151
 152                 case ASN1_ITYPE_SEQUENCE:
 153                 if(asn1_cb) {
 154                         i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
 155                         if(!i) goto auxerr;
 156                         if(i==2) return 1;
 157                 }
 158                 if(!combine) {
 159                         *pval = OPENSSL_malloc(it->size);
 160                         if(!*pval) goto memerr;
 161                         memset(*pval, 0, it->size);
 162                         asn1_do_lock(pval, 0, it);
 163                         asn1_enc_init(pval, it);
 164                 }
 165                 for(i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
 166                         pseqval = asn1_get_field_ptr(pval, tt);
 167                         if(!ASN1_template_new(pseqval, tt)) goto memerr;
 168                 }
 169                 if(asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
 170                                 goto auxerr;
 171                 break;
 172         }
 173 #ifdef CRYPTO_MDEBUG
 174         if(it->sname) CRYPTO_pop_info();
 175 #endif
 176         return 1;
 177
 178         memerr:
 179         ASN1err(ASN1_F_ASN1_ITEM_NEW, ERR_R_MALLOC_FAILURE);
 180 #ifdef CRYPTO_MDEBUG
 181         if(it->sname) CRYPTO_pop_info();
 182 #endif
 183         return 0;
 184
 185         auxerr:
 186         ASN1err(ASN1_F_ASN1_ITEM_NEW, ASN1_R_AUX_ERROR);
 187         ASN1_item_ex_free(pval, it);
 188 #ifdef CRYPTO_MDEBUG
 189         if(it->sname) CRYPTO_pop_info();
 190 #endif
 191         return 0;
 192
 193 }
 194
 195 static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
 196 {
 197         const ASN1_EXTERN_FUNCS *ef;
 198
 199         switch(it->itype) {
 200
 201                 case ASN1_ITYPE_EXTERN:
 202                 ef = it->funcs;
 203                 if(ef && ef->asn1_ex_clear)
 204                         ef->asn1_ex_clear(pval, it);
 205                 else *pval = NULL;
 206                 break;
 207
 208
 209                 case ASN1_ITYPE_PRIMITIVE:
 210                 if(it->templates)
 211                         asn1_template_clear(pval, it->templates);
 212                 else
 213                         asn1_primitive_clear(pval, it);
 214                 break;
 215
 216                 case ASN1_ITYPE_MSTRING:
 217                 asn1_primitive_clear(pval, it);
 218                 break;
 219
 220                 case ASN1_ITYPE_COMPAT:
 221                 case ASN1_ITYPE_CHOICE:
 222                 case ASN1_ITYPE_SEQUENCE:
 223                 *pval = NULL;
 224                 break;
 225         }
 226 }
 227
 228
 229 int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
 230 {
 231         const ASN1_ITEM *it = tt->item;
 232         int ret;
 233         if(tt->flags & ASN1_TFLG_OPTIONAL) {
 234                 asn1_template_clear(pval, tt);
 235                 return 1;
 236         }
 237         /* If ANY DEFINED BY nothing to do */
 238
 239         if(tt->flags & ASN1_TFLG_ADB_MASK) {
 240                 *pval = NULL;
 241                 return 1;
 242         }
 243 #ifdef CRYPTO_MDEBUG
 244         if(tt->field_name) CRYPTO_push_info(tt->field_name);
 245 #endif
 246         /* If SET OF or SEQUENCE OF, its a STACK */
 247         if(tt->flags & ASN1_TFLG_SK_MASK) {
 248                 STACK_OF(ASN1_VALUE) *skval;
 249                 skval = sk_ASN1_VALUE_new_null();
 250                 if(!skval) {
 251                         ASN1err(ASN1_F_ASN1_TEMPLATE_NEW, ERR_R_MALLOC_FAILURE);
 252                         ret = 0;
 253                         goto done;
 254                 }
 255                 *pval = (ASN1_VALUE *)skval;
 256                 ret = 1;
 257                 goto done;
 258         }
 259         /* Otherwise pass it back to the item routine */
 260         ret = asn1_item_ex_combine_new(pval, it, tt->flags & ASN1_TFLG_COMBINE);
 261         done:
 262 #ifdef CRYPTO_MDEBUG
 263         if(it->sname) CRYPTO_pop_info();
 264 #endif
 265         return ret;
 266 }
 267
 268 void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
 269 {
 270         /* If ADB or STACK just NULL the field */
 271         if(tt->flags & (ASN1_TFLG_ADB_MASK|ASN1_TFLG_SK_MASK))
 272                 *pval = NULL;
 273         else
 274                 asn1_item_clear(pval, tt->item);
 275 }
 276
 277
 278 /* NB: could probably combine most of the real XXX_new() behaviour and junk all the old
 279  * functions.
 280  */
 281
 282 int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
 283 {
 284         ASN1_TYPE *typ;
 285         int utype;
 286         const ASN1_PRIMITIVE_FUNCS *pf;
 287         pf = it->funcs;
 288         if(pf && pf->prim_new) return pf->prim_new(pval, it);
 289         if(!it || (it->itype == ASN1_ITYPE_MSTRING)) utype = -1;
 290         else utype = it->utype;
 291         switch(utype) {
 292                 case V_ASN1_OBJECT:
 293                 *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef);
 294                 return 1;
 295
 296                 case V_ASN1_BOOLEAN:
 297                 *(ASN1_BOOLEAN *)pval = it->size;
 298                 return 1;
 299
 300                 case V_ASN1_NULL:
 301                 *pval = (ASN1_VALUE *)1;
 302                 return 1;
 303
 304                 case V_ASN1_ANY:
 305                 typ = OPENSSL_malloc(sizeof(ASN1_TYPE));
 306                 if(!typ) return 0;
 307                 typ->value.ptr = NULL;
 308                 typ->type = -1;
 309                 *pval = (ASN1_VALUE *)typ;
 310                 break;
 311
 312                 default:
 313                 *pval = (ASN1_VALUE *)ASN1_STRING_type_new(utype);
 314                 break;
 315         }
 316         if(*pval) return 1;
 317         return 0;
 318 }
 319
 320 void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
 321 {
 322         int utype;
 323         const ASN1_PRIMITIVE_FUNCS *pf;
 324         pf = it->funcs;
 325         if(pf) {
 326                 if(pf->prim_clear)
 327                         pf->prim_clear(pval, it);
 328                 else
 329                         *pval = NULL;
 330                 return;
 331         }
 332         if(!it || (it->itype == ASN1_ITYPE_MSTRING)) utype = -1;
 333         else utype = it->utype;
 334         if(utype == V_ASN1_BOOLEAN)
 335                 *(ASN1_BOOLEAN *)pval = it->size;
 336         else *pval = NULL;
 337 }