crypto/openssl-0.9.7d/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 #include <string.h>
  66
  67 static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it, int combine);
  68 static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
  69 static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
  70 void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
  71
  72 ASN1_VALUE *ASN1_item_new(const ASN1_ITEM *it)
  73 {
  74         ASN1_VALUE *ret = NULL;
  75         if(ASN1_item_ex_new(&ret, it) > 0) return ret;
  76         return NULL;
  77 }
  78
  79 /* Allocate an ASN1 structure */
  80
  81 int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
  82 {
  83         return asn1_item_ex_combine_new(pval, it, 0);
  84 }
  85
  86 static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it, int combine)
  87 {
  88         const ASN1_TEMPLATE *tt = NULL;
  89         const ASN1_COMPAT_FUNCS *cf;
  90         const ASN1_EXTERN_FUNCS *ef;
  91         const ASN1_AUX *aux = it->funcs;
  92         ASN1_aux_cb *asn1_cb;
  93         ASN1_VALUE **pseqval;
  94         int i;
  95         if(aux && aux->asn1_cb) asn1_cb = aux->asn1_cb;
  96         else asn1_cb = 0;
  97
  98         if(!combine) *pval = NULL;
  99
 100 #ifdef CRYPTO_MDEBUG
 101         if(it->sname) CRYPTO_push_info(it->sname);
 102 #endif
 103
 104         switch(it->itype) {
 105
 106                 case ASN1_ITYPE_EXTERN:
 107                 ef = it->funcs;
 108                 if(ef && ef->asn1_ex_new) {
 109                         if(!ef->asn1_ex_new(pval, it))
 110                                 goto memerr;
 111                 }
 112                 break;
 113
 114                 case ASN1_ITYPE_COMPAT:
 115                 cf = it->funcs;
 116                 if(cf && cf->asn1_new) {
 117                         *pval = cf->asn1_new();
 118                         if(!*pval) goto memerr;
 119                 }
 120                 break;
 121
 122                 case ASN1_ITYPE_PRIMITIVE:
 123                 if(it->templates) {
 124                         if(!ASN1_template_new(pval, it->templates))
 125                                 goto memerr;
 126                 } else {
 127                         if(!ASN1_primitive_new(pval, it))
 128                                 goto memerr;
 129                 }
 130                 break;
 131
 132                 case ASN1_ITYPE_MSTRING:
 133                 if(!ASN1_primitive_new(pval, it))
 134                                 goto memerr;
 135                 break;
 136
 137                 case ASN1_ITYPE_CHOICE:
 138                 if(asn1_cb) {
 139                         i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
 140                         if(!i) goto auxerr;
 141                         if(i==2) {
 142 #ifdef CRYPTO_MDEBUG
 143                                 if(it->sname) CRYPTO_pop_info();
 144 #endif
 145                                 return 1;
 146                         }
 147                 }
 148                 if(!combine) {
 149                         *pval = OPENSSL_malloc(it->size);
 150                         if(!*pval) goto memerr;
 151                         memset(*pval, 0, it->size);
 152                 }
 153                 asn1_set_choice_selector(pval, -1, it);
 154                 if(asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
 155                                 goto auxerr;
 156                 break;
 157
 158                 case ASN1_ITYPE_SEQUENCE:
 159                 if(asn1_cb) {
 160                         i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
 161                         if(!i) goto auxerr;
 162                         if(i==2) {
 163 #ifdef CRYPTO_MDEBUG
 164                                 if(it->sname) CRYPTO_pop_info();
 165 #endif
 166                                 return 1;
 167                         }
 168                 }
 169                 if(!combine) {
 170                         *pval = OPENSSL_malloc(it->size);
 171                         if(!*pval) goto memerr;
 172                         memset(*pval, 0, it->size);
 173                         asn1_do_lock(pval, 0, it);
 174                         asn1_enc_init(pval, it);
 175                 }
 176                 for(i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
 177                         pseqval = asn1_get_field_ptr(pval, tt);
 178                         if(!ASN1_template_new(pseqval, tt)) goto memerr;
 179                 }
 180                 if(asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
 181                                 goto auxerr;
 182                 break;
 183         }
 184 #ifdef CRYPTO_MDEBUG
 185         if(it->sname) CRYPTO_pop_info();
 186 #endif
 187         return 1;
 188
 189         memerr:
 190         ASN1err(ASN1_F_ASN1_ITEM_NEW, ERR_R_MALLOC_FAILURE);
 191 #ifdef CRYPTO_MDEBUG
 192         if(it->sname) CRYPTO_pop_info();
 193 #endif
 194         return 0;
 195
 196         auxerr:
 197         ASN1err(ASN1_F_ASN1_ITEM_NEW, ASN1_R_AUX_ERROR);
 198         ASN1_item_ex_free(pval, it);
 199 #ifdef CRYPTO_MDEBUG
 200         if(it->sname) CRYPTO_pop_info();
 201 #endif
 202         return 0;
 203
 204 }
 205
 206 static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
 207 {
 208         const ASN1_EXTERN_FUNCS *ef;
 209
 210         switch(it->itype) {
 211
 212                 case ASN1_ITYPE_EXTERN:
 213                 ef = it->funcs;
 214                 if(ef && ef->asn1_ex_clear)
 215                         ef->asn1_ex_clear(pval, it);
 216                 else *pval = NULL;
 217                 break;
 218
 219
 220                 case ASN1_ITYPE_PRIMITIVE:
 221                 if(it->templates)
 222                         asn1_template_clear(pval, it->templates);
 223                 else
 224                         asn1_primitive_clear(pval, it);
 225                 break;
 226
 227                 case ASN1_ITYPE_MSTRING:
 228                 asn1_primitive_clear(pval, it);
 229                 break;
 230
 231                 case ASN1_ITYPE_COMPAT:
 232                 case ASN1_ITYPE_CHOICE:
 233                 case ASN1_ITYPE_SEQUENCE:
 234                 *pval = NULL;
 235                 break;
 236         }
 237 }
 238
 239
 240 int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
 241 {
 242         const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
 243         int ret;
 244         if(tt->flags & ASN1_TFLG_OPTIONAL) {
 245                 asn1_template_clear(pval, tt);
 246                 return 1;
 247         }
 248         /* If ANY DEFINED BY nothing to do */
 249
 250         if(tt->flags & ASN1_TFLG_ADB_MASK) {
 251                 *pval = NULL;
 252                 return 1;
 253         }
 254 #ifdef CRYPTO_MDEBUG
 255         if(tt->field_name) CRYPTO_push_info(tt->field_name);
 256 #endif
 257         /* If SET OF or SEQUENCE OF, its a STACK */
 258         if(tt->flags & ASN1_TFLG_SK_MASK) {
 259                 STACK_OF(ASN1_VALUE) *skval;
 260                 skval = sk_ASN1_VALUE_new_null();
 261                 if(!skval) {
 262                         ASN1err(ASN1_F_ASN1_TEMPLATE_NEW, ERR_R_MALLOC_FAILURE);
 263                         ret = 0;
 264                         goto done;
 265                 }
 266                 *pval = (ASN1_VALUE *)skval;
 267                 ret = 1;
 268                 goto done;
 269         }
 270         /* Otherwise pass it back to the item routine */
 271         ret = asn1_item_ex_combine_new(pval, it, tt->flags & ASN1_TFLG_COMBINE);
 272         done:
 273 #ifdef CRYPTO_MDEBUG
 274         if(it->sname) CRYPTO_pop_info();
 275 #endif
 276         return ret;
 277 }
 278
 279 static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
 280 {
 281         /* If ADB or STACK just NULL the field */
 282         if(tt->flags & (ASN1_TFLG_ADB_MASK|ASN1_TFLG_SK_MASK))
 283                 *pval = NULL;
 284         else
 285                 asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
 286 }
 287
 288
 289 /* NB: could probably combine most of the real XXX_new() behaviour and junk all the old
 290  * functions.
 291  */
 292
 293 int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
 294 {
 295         ASN1_TYPE *typ;
 296         int utype;
 297         const ASN1_PRIMITIVE_FUNCS *pf;
 298         pf = it->funcs;
 299         if(pf && pf->prim_new) return pf->prim_new(pval, it);
 300         if(!it || (it->itype == ASN1_ITYPE_MSTRING)) utype = -1;
 301         else utype = it->utype;
 302         switch(utype) {
 303                 case V_ASN1_OBJECT:
 304                 *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef);
 305                 return 1;
 306
 307                 case V_ASN1_BOOLEAN:
 308                 if (it)
 309                         *(ASN1_BOOLEAN *)pval = it->size;
 310                 else
 311                         *(ASN1_BOOLEAN *)pval = -1;
 312                 return 1;
 313
 314                 case V_ASN1_NULL:
 315                 *pval = (ASN1_VALUE *)1;
 316                 return 1;
 317
 318                 case V_ASN1_ANY:
 319                 typ = OPENSSL_malloc(sizeof(ASN1_TYPE));
 320                 if(!typ) return 0;
 321                 typ->value.ptr = NULL;
 322                 typ->type = -1;
 323                 *pval = (ASN1_VALUE *)typ;
 324                 break;
 325
 326                 default:
 327                 *pval = (ASN1_VALUE *)ASN1_STRING_type_new(utype);
 328                 break;
 329         }
 330         if(*pval) return 1;
 331         return 0;
 332 }
 333
 334 void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
 335 {
 336         int utype;
 337         const ASN1_PRIMITIVE_FUNCS *pf;
 338         pf = it->funcs;
 339         if(pf) {
 340                 if(pf->prim_clear)
 341                         pf->prim_clear(pval, it);
 342                 else
 343                         *pval = NULL;
 344                 return;
 345         }
 346         if(!it || (it->itype == ASN1_ITYPE_MSTRING)) utype = -1;
 347         else utype = it->utype;
 348         if(utype == V_ASN1_BOOLEAN)
 349                 *(ASN1_BOOLEAN *)pval = it->size;
 350         else *pval = NULL;
 351 }