crypto/asn1/tasn_new.c

   1 /* tasn_new.c */
   2 /*
   3  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   4  * 2000.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 2000-2004 The OpenSSL Project.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    licensing@OpenSSL.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  *
  54  * This product includes cryptographic software written by Eric Young
  55  * (eay@cryptsoft.com).  This product includes software written by Tim
  56  * Hudson (tjh@cryptsoft.com).
  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 #ifdef CRYPTO_MDEBUG
 104     if (it->sname)
 105         CRYPTO_push_info(it->sname);
 106 #endif
 107
 108     switch (it->itype) {
 109
 110     case ASN1_ITYPE_EXTERN:
 111         ef = it->funcs;
 112         if (ef && ef->asn1_ex_new) {
 113             if (!ef->asn1_ex_new(pval, it))
 114                 goto memerr;
 115         }
 116         break;
 117
 118     case ASN1_ITYPE_COMPAT:
 119         cf = it->funcs;
 120         if (cf && cf->asn1_new) {
 121             *pval = cf->asn1_new();
 122             if (!*pval)
 123                 goto memerr;
 124         }
 125         break;
 126
 127     case ASN1_ITYPE_PRIMITIVE:
 128         if (it->templates) {
 129             if (!ASN1_template_new(pval, it->templates))
 130                 goto memerr;
 131         } else if (!ASN1_primitive_new(pval, it))
 132             goto memerr;
 133         break;
 134
 135     case ASN1_ITYPE_MSTRING:
 136         if (!ASN1_primitive_new(pval, it))
 137             goto memerr;
 138         break;
 139
 140     case ASN1_ITYPE_CHOICE:
 141         if (asn1_cb) {
 142             i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
 143             if (!i)
 144                 goto auxerr;
 145             if (i == 2) {
 146 #ifdef CRYPTO_MDEBUG
 147                 if (it->sname)
 148                     CRYPTO_pop_info();
 149 #endif
 150                 return 1;
 151             }
 152         }
 153         if (!combine) {
 154             *pval = OPENSSL_malloc(it->size);
 155             if (!*pval)
 156                 goto memerr;
 157             memset(*pval, 0, it->size);
 158         }
 159         asn1_set_choice_selector(pval, -1, it);
 160         if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
 161             goto auxerr;
 162         break;
 163
 164     case ASN1_ITYPE_NDEF_SEQUENCE:
 165     case ASN1_ITYPE_SEQUENCE:
 166         if (asn1_cb) {
 167             i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
 168             if (!i)
 169                 goto auxerr;
 170             if (i == 2) {
 171 #ifdef CRYPTO_MDEBUG
 172                 if (it->sname)
 173                     CRYPTO_pop_info();
 174 #endif
 175                 return 1;
 176             }
 177         }
 178         if (!combine) {
 179             *pval = OPENSSL_malloc(it->size);
 180             if (!*pval)
 181                 goto memerr;
 182             memset(*pval, 0, it->size);
 183             asn1_do_lock(pval, 0, it);
 184             asn1_enc_init(pval, it);
 185         }
 186         for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
 187             pseqval = asn1_get_field_ptr(pval, tt);
 188             if (!ASN1_template_new(pseqval, tt))
 189                 goto memerr;
 190         }
 191         if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
 192             goto auxerr;
 193         break;
 194     }
 195 #ifdef CRYPTO_MDEBUG
 196     if (it->sname)
 197         CRYPTO_pop_info();
 198 #endif
 199     return 1;
 200
 201  memerr:
 202     ASN1err(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW, ERR_R_MALLOC_FAILURE);
 203 #ifdef CRYPTO_MDEBUG
 204     if (it->sname)
 205         CRYPTO_pop_info();
 206 #endif
 207     return 0;
 208
 209  auxerr:
 210     ASN1err(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW, ASN1_R_AUX_ERROR);
 211     ASN1_item_ex_free(pval, it);
 212 #ifdef CRYPTO_MDEBUG
 213     if (it->sname)
 214         CRYPTO_pop_info();
 215 #endif
 216     return 0;
 217
 218 }
 219
 220 static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
 221 {
 222     const ASN1_EXTERN_FUNCS *ef;
 223
 224     switch (it->itype) {
 225
 226     case ASN1_ITYPE_EXTERN:
 227         ef = it->funcs;
 228         if (ef && ef->asn1_ex_clear)
 229             ef->asn1_ex_clear(pval, it);
 230         else
 231             *pval = NULL;
 232         break;
 233
 234     case ASN1_ITYPE_PRIMITIVE:
 235         if (it->templates)
 236             asn1_template_clear(pval, it->templates);
 237         else
 238             asn1_primitive_clear(pval, it);
 239         break;
 240
 241     case ASN1_ITYPE_MSTRING:
 242         asn1_primitive_clear(pval, it);
 243         break;
 244
 245     case ASN1_ITYPE_COMPAT:
 246     case ASN1_ITYPE_CHOICE:
 247     case ASN1_ITYPE_SEQUENCE:
 248     case ASN1_ITYPE_NDEF_SEQUENCE:
 249         *pval = NULL;
 250         break;
 251     }
 252 }
 253
 254 int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
 255 {
 256     const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
 257     int ret;
 258     if (tt->flags & ASN1_TFLG_OPTIONAL) {
 259         asn1_template_clear(pval, tt);
 260         return 1;
 261     }
 262     /* If ANY DEFINED BY nothing to do */
 263
 264     if (tt->flags & ASN1_TFLG_ADB_MASK) {
 265         *pval = NULL;
 266         return 1;
 267     }
 268 #ifdef CRYPTO_MDEBUG
 269     if (tt->field_name)
 270         CRYPTO_push_info(tt->field_name);
 271 #endif
 272     /* If SET OF or SEQUENCE OF, its a STACK */
 273     if (tt->flags & ASN1_TFLG_SK_MASK) {
 274         STACK_OF(ASN1_VALUE) *skval;
 275         skval = sk_ASN1_VALUE_new_null();
 276         if (!skval) {
 277             ASN1err(ASN1_F_ASN1_TEMPLATE_NEW, ERR_R_MALLOC_FAILURE);
 278             ret = 0;
 279             goto done;
 280         }
 281         *pval = (ASN1_VALUE *)skval;
 282         ret = 1;
 283         goto done;
 284     }
 285     /* Otherwise pass it back to the item routine */
 286     ret = asn1_item_ex_combine_new(pval, it, tt->flags & ASN1_TFLG_COMBINE);
 287  done:
 288 #ifdef CRYPTO_MDEBUG
 289     if (it->sname)
 290         CRYPTO_pop_info();
 291 #endif
 292     return ret;
 293 }
 294
 295 static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
 296 {
 297     /* If ADB or STACK just NULL the field */
 298     if (tt->flags & (ASN1_TFLG_ADB_MASK | ASN1_TFLG_SK_MASK))
 299         *pval = NULL;
 300     else
 301         asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
 302 }
 303
 304 /*
 305  * NB: could probably combine most of the real XXX_new() behaviour and junk
 306  * all the old functions.
 307  */
 308
 309 int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
 310 {
 311     ASN1_TYPE *typ;
 312     int utype;
 313
 314     if (it && it->funcs) {
 315         const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
 316         if (pf->prim_new)
 317             return pf->prim_new(pval, it);
 318     }
 319
 320     if (!it || (it->itype == ASN1_ITYPE_MSTRING))
 321         utype = -1;
 322     else
 323         utype = it->utype;
 324     switch (utype) {
 325     case V_ASN1_OBJECT:
 326         *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef);
 327         return 1;
 328
 329     case V_ASN1_BOOLEAN:
 330         if (it)
 331             *(ASN1_BOOLEAN *)pval = it->size;
 332         else
 333             *(ASN1_BOOLEAN *)pval = -1;
 334         return 1;
 335
 336     case V_ASN1_NULL:
 337         *pval = (ASN1_VALUE *)1;
 338         return 1;
 339
 340     case V_ASN1_ANY:
 341         typ = OPENSSL_malloc(sizeof(ASN1_TYPE));
 342         if (!typ)
 343             return 0;
 344         typ->value.ptr = NULL;
 345         typ->type = -1;
 346         *pval = (ASN1_VALUE *)typ;
 347         break;
 348
 349     default:
 350         *pval = (ASN1_VALUE *)ASN1_STRING_type_new(utype);
 351         break;
 352     }
 353     if (*pval)
 354         return 1;
 355     return 0;
 356 }
 357
 358 void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
 359 {
 360     int utype;
 361     if (it && it->funcs) {
 362         const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
 363         if (pf->prim_clear)
 364             pf->prim_clear(pval, it);
 365         else
 366             *pval = NULL;
 367         return;
 368     }
 369     if (!it || (it->itype == ASN1_ITYPE_MSTRING))
 370         utype = -1;
 371     else
 372         utype = it->utype;
 373     if (utype == V_ASN1_BOOLEAN)
 374         *(ASN1_BOOLEAN *)pval = it->size;
 375     else
 376         *pval = NULL;
 377 }