tasn_new.c revision 296341
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 67static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it, 68 int combine); 69static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it); 70static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt); 71static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it); 72 73ASN1_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 83int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it) 84{ 85 return asn1_item_ex_combine_new(pval, it, 0); 86} 87 88static 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, NULL); 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, NULL)) 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, NULL); 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, NULL)) 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 220static 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 254int 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 295static 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 309int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it) 310{ 311 ASN1_TYPE *typ; 312 ASN1_STRING *str; 313 int utype; 314 315 if (!it) 316 return 0; 317 318 if (it->funcs) { 319 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs; 320 if (pf->prim_new) 321 return pf->prim_new(pval, it); 322 } 323 324 if (it->itype == ASN1_ITYPE_MSTRING) 325 utype = -1; 326 else 327 utype = it->utype; 328 switch (utype) { 329 case V_ASN1_OBJECT: 330 *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef); 331 return 1; 332 333 case V_ASN1_BOOLEAN: 334 *(ASN1_BOOLEAN *)pval = it->size; 335 return 1; 336 337 case V_ASN1_NULL: 338 *pval = (ASN1_VALUE *)1; 339 return 1; 340 341 case V_ASN1_ANY: 342 typ = OPENSSL_malloc(sizeof(ASN1_TYPE)); 343 if (!typ) 344 return 0; 345 typ->value.ptr = NULL; 346 typ->type = -1; 347 *pval = (ASN1_VALUE *)typ; 348 break; 349 350 default: 351 str = ASN1_STRING_type_new(utype); 352 if (it->itype == ASN1_ITYPE_MSTRING && str) 353 str->flags |= ASN1_STRING_FLAG_MSTRING; 354 *pval = (ASN1_VALUE *)str; 355 break; 356 } 357 if (*pval) 358 return 1; 359 return 0; 360} 361 362static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it) 363{ 364 int utype; 365 if (it && it->funcs) { 366 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs; 367 if (pf->prim_clear) 368 pf->prim_clear(pval, it); 369 else 370 *pval = NULL; 371 return; 372 } 373 if (!it || (it->itype == ASN1_ITYPE_MSTRING)) 374 utype = -1; 375 else 376 utype = it->utype; 377 if (utype == V_ASN1_BOOLEAN) 378 *(ASN1_BOOLEAN *)pval = it->size; 379 else 380 *pval = NULL; 381} 382