crypto/openssl/crypto/asn1/tasn_new.c

   1 /* tasn_new.c */
   2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   3  * project 2000.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2000-2004 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,
  68                                                                 int combine);
  69 static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
  70 static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
  71 void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
  72
  73 ASN1_VALUE *ASN1_item_new(const ASN1_ITEM *it)
  74         {
  75         ASN1_VALUE *ret = NULL;
  76         if (ASN1_item_ex_new(&ret, it) > 0)
  77                 return ret;
  78         return NULL;
  79         }
  80
  81 /* Allocate an ASN1 structure */
  82
  83 int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
  84         {
  85         return asn1_item_ex_combine_new(pval, it, 0);
  86         }
  87
  88 static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
  89                                                                 int combine)
  90         {
  91         const ASN1_TEMPLATE *tt = NULL;
  92         const ASN1_COMPAT_FUNCS *cf;
  93         const ASN1_EXTERN_FUNCS *ef;
  94         const ASN1_AUX *aux = it->funcs;
  95         ASN1_aux_cb *asn1_cb;
  96         ASN1_VALUE **pseqval;
  97         int i;
  98         if (aux && aux->asn1_cb)
  99                 asn1_cb = aux->asn1_cb;
 100         else
 101                 asn1_cb = 0;
 102
 103         if (!combine) *pval = NULL;
 104
 105 #ifdef CRYPTO_MDEBUG
 106         if (it->sname)
 107                 CRYPTO_push_info(it->sname);
 108 #endif
 109
 110         switch(it->itype)
 111                 {
 112
 113                 case ASN1_ITYPE_EXTERN:
 114                 ef = it->funcs;
 115                 if (ef && ef->asn1_ex_new)
 116                         {
 117                         if (!ef->asn1_ex_new(pval, it))
 118                                 goto memerr;
 119                         }
 120                 break;
 121
 122                 case ASN1_ITYPE_COMPAT:
 123                 cf = it->funcs;
 124                 if (cf && cf->asn1_new) {
 125                         *pval = cf->asn1_new();
 126                         if (!*pval)
 127                                 goto memerr;
 128                 }
 129                 break;
 130
 131                 case ASN1_ITYPE_PRIMITIVE:
 132                 if (it->templates)
 133                         {
 134                         if (!ASN1_template_new(pval, it->templates))
 135                                 goto memerr;
 136                         }
 137                 else if (!ASN1_primitive_new(pval, it))
 138                                 goto memerr;
 139                 break;
 140
 141                 case ASN1_ITYPE_MSTRING:
 142                 if (!ASN1_primitive_new(pval, it))
 143                                 goto memerr;
 144                 break;
 145
 146                 case ASN1_ITYPE_CHOICE:
 147                 if (asn1_cb)
 148                         {
 149                         i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
 150                         if (!i)
 151                                 goto auxerr;
 152                         if (i==2)
 153                                 {
 154 #ifdef CRYPTO_MDEBUG
 155                                 if (it->sname)
 156                                         CRYPTO_pop_info();
 157 #endif
 158                                 return 1;
 159                                 }
 160                         }
 161                 if (!combine)
 162                         {
 163                         *pval = OPENSSL_malloc(it->size);
 164                         if (!*pval)
 165                                 goto memerr;
 166                         memset(*pval, 0, it->size);
 167                         }
 168                 asn1_set_choice_selector(pval, -1, it);
 169                 if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
 170                                 goto auxerr;
 171                 break;
 172
 173                 case ASN1_ITYPE_NDEF_SEQUENCE:
 174                 case ASN1_ITYPE_SEQUENCE:
 175                 if (asn1_cb)
 176                         {
 177                         i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
 178                         if (!i)
 179                                 goto auxerr;
 180                         if (i==2)
 181                                 {
 182 #ifdef CRYPTO_MDEBUG
 183                                 if (it->sname)
 184                                         CRYPTO_pop_info();
 185 #endif
 186                                 return 1;
 187                                 }
 188                         }
 189                 if (!combine)
 190                         {
 191                         *pval = OPENSSL_malloc(it->size);
 192                         if (!*pval)
 193                                 goto memerr;
 194                         memset(*pval, 0, it->size);
 195                         asn1_do_lock(pval, 0, it);
 196                         asn1_enc_init(pval, it);
 197                         }
 198                 for (i = 0, tt = it->templates; i < it->tcount; tt++, i++)
 199                         {
 200                         pseqval = asn1_get_field_ptr(pval, tt);
 201                         if (!ASN1_template_new(pseqval, tt))
 202                                 goto memerr;
 203                         }
 204                 if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
 205                                 goto auxerr;
 206                 break;
 207         }
 208 #ifdef CRYPTO_MDEBUG
 209         if (it->sname) CRYPTO_pop_info();
 210 #endif
 211         return 1;
 212
 213         memerr:
 214         ASN1err(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW, ERR_R_MALLOC_FAILURE);
 215 #ifdef CRYPTO_MDEBUG
 216         if (it->sname) CRYPTO_pop_info();
 217 #endif
 218         return 0;
 219
 220         auxerr:
 221         ASN1err(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW, ASN1_R_AUX_ERROR);
 222         ASN1_item_ex_free(pval, it);
 223 #ifdef CRYPTO_MDEBUG
 224         if (it->sname) CRYPTO_pop_info();
 225 #endif
 226         return 0;
 227
 228         }
 229
 230 static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
 231         {
 232         const ASN1_EXTERN_FUNCS *ef;
 233
 234         switch(it->itype)
 235                 {
 236
 237                 case ASN1_ITYPE_EXTERN:
 238                 ef = it->funcs;
 239                 if (ef && ef->asn1_ex_clear)
 240                         ef->asn1_ex_clear(pval, it);
 241                 else *pval = NULL;
 242                 break;
 243
 244
 245                 case ASN1_ITYPE_PRIMITIVE:
 246                 if (it->templates)
 247                         asn1_template_clear(pval, it->templates);
 248                 else
 249                         asn1_primitive_clear(pval, it);
 250                 break;
 251
 252                 case ASN1_ITYPE_MSTRING:
 253                 asn1_primitive_clear(pval, it);
 254                 break;
 255
 256                 case ASN1_ITYPE_COMPAT:
 257                 case ASN1_ITYPE_CHOICE:
 258                 case ASN1_ITYPE_SEQUENCE:
 259                 case ASN1_ITYPE_NDEF_SEQUENCE:
 260                 *pval = NULL;
 261                 break;
 262                 }
 263         }
 264
 265
 266 int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
 267         {
 268         const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
 269         int ret;
 270         if (tt->flags & ASN1_TFLG_OPTIONAL)
 271                 {
 272                 asn1_template_clear(pval, tt);
 273                 return 1;
 274                 }
 275         /* If ANY DEFINED BY nothing to do */
 276
 277         if (tt->flags & ASN1_TFLG_ADB_MASK)
 278                 {
 279                 *pval = NULL;
 280                 return 1;
 281                 }
 282 #ifdef CRYPTO_MDEBUG
 283         if (tt->field_name)
 284                 CRYPTO_push_info(tt->field_name);
 285 #endif
 286         /* If SET OF or SEQUENCE OF, its a STACK */
 287         if (tt->flags & ASN1_TFLG_SK_MASK)
 288                 {
 289                 STACK_OF(ASN1_VALUE) *skval;
 290                 skval = sk_ASN1_VALUE_new_null();
 291                 if (!skval)
 292                         {
 293                         ASN1err(ASN1_F_ASN1_TEMPLATE_NEW, ERR_R_MALLOC_FAILURE);
 294                         ret = 0;
 295                         goto done;
 296                         }
 297                 *pval = (ASN1_VALUE *)skval;
 298                 ret = 1;
 299                 goto done;
 300                 }
 301         /* Otherwise pass it back to the item routine */
 302         ret = asn1_item_ex_combine_new(pval, it, tt->flags & ASN1_TFLG_COMBINE);
 303         done:
 304 #ifdef CRYPTO_MDEBUG
 305         if (it->sname)
 306                 CRYPTO_pop_info();
 307 #endif
 308         return ret;
 309         }
 310
 311 static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
 312         {
 313         /* If ADB or STACK just NULL the field */
 314         if (tt->flags & (ASN1_TFLG_ADB_MASK|ASN1_TFLG_SK_MASK))
 315                 *pval = NULL;
 316         else
 317                 asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
 318         }
 319
 320
 321 /* NB: could probably combine most of the real XXX_new() behaviour and junk
 322  * all the old functions.
 323  */
 324
 325 int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
 326         {
 327         ASN1_TYPE *typ;
 328         int utype;
 329
 330         if (it && it->funcs)
 331                 {
 332                 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
 333                 if (pf->prim_new)
 334                         return pf->prim_new(pval, it);
 335                 }
 336
 337         if (!it || (it->itype == ASN1_ITYPE_MSTRING))
 338                 utype = -1;
 339         else
 340                 utype = it->utype;
 341         switch(utype)
 342                 {
 343                 case V_ASN1_OBJECT:
 344                 *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef);
 345                 return 1;
 346
 347                 case V_ASN1_BOOLEAN:
 348                 if (it)
 349                         *(ASN1_BOOLEAN *)pval = it->size;
 350                 else
 351                         *(ASN1_BOOLEAN *)pval = -1;
 352                 return 1;
 353
 354                 case V_ASN1_NULL:
 355                 *pval = (ASN1_VALUE *)1;
 356                 return 1;
 357
 358                 case V_ASN1_ANY:
 359                 typ = OPENSSL_malloc(sizeof(ASN1_TYPE));
 360                 if (!typ)
 361                         return 0;
 362                 typ->value.ptr = NULL;
 363                 typ->type = -1;
 364                 *pval = (ASN1_VALUE *)typ;
 365                 break;
 366
 367                 default:
 368                 *pval = (ASN1_VALUE *)ASN1_STRING_type_new(utype);
 369                 break;
 370                 }
 371         if (*pval)
 372                 return 1;
 373         return 0;
 374         }
 375
 376 void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
 377         {
 378         int utype;
 379         if (it && it->funcs)
 380                 {
 381                 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
 382                 if (pf->prim_clear)
 383                         pf->prim_clear(pval, it);
 384                 else
 385                         *pval = NULL;
 386                 return;
 387                 }
 388         if (!it || (it->itype == ASN1_ITYPE_MSTRING))
 389                 utype = -1;
 390         else
 391                 utype = it->utype;
 392         if (utype == V_ASN1_BOOLEAN)
 393                 *(ASN1_BOOLEAN *)pval = it->size;
 394         else *pval = NULL;
 395         }