tasn_new.c revision 280304
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 if (!combine) 104 *pval = NULL; 105 106#ifdef CRYPTO_MDEBUG 107 if (it->sname) 108 CRYPTO_push_info(it->sname); 109#endif 110 111 switch (it->itype) { 112 113 case ASN1_ITYPE_EXTERN: 114 ef = it->funcs; 115 if (ef && ef->asn1_ex_new) { 116 if (!ef->asn1_ex_new(pval, it)) 117 goto memerr; 118 } 119 break; 120 121 case ASN1_ITYPE_COMPAT: 122 cf = it->funcs; 123 if (cf && cf->asn1_new) { 124 *pval = cf->asn1_new(); 125 if (!*pval) 126 goto memerr; 127 } 128 break; 129 130 case ASN1_ITYPE_PRIMITIVE: 131 if (it->templates) { 132 if (!ASN1_template_new(pval, it->templates)) 133 goto memerr; 134 } else if (!ASN1_primitive_new(pval, it)) 135 goto memerr; 136 break; 137 138 case ASN1_ITYPE_MSTRING: 139 if (!ASN1_primitive_new(pval, it)) 140 goto memerr; 141 break; 142 143 case ASN1_ITYPE_CHOICE: 144 if (asn1_cb) { 145 i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL); 146 if (!i) 147 goto auxerr; 148 if (i == 2) { 149#ifdef CRYPTO_MDEBUG 150 if (it->sname) 151 CRYPTO_pop_info(); 152#endif 153 return 1; 154 } 155 } 156 if (!combine) { 157 *pval = OPENSSL_malloc(it->size); 158 if (!*pval) 159 goto memerr; 160 memset(*pval, 0, it->size); 161 } 162 asn1_set_choice_selector(pval, -1, it); 163 if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL)) 164 goto auxerr; 165 break; 166 167 case ASN1_ITYPE_NDEF_SEQUENCE: 168 case ASN1_ITYPE_SEQUENCE: 169 if (asn1_cb) { 170 i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL); 171 if (!i) 172 goto auxerr; 173 if (i == 2) { 174#ifdef CRYPTO_MDEBUG 175 if (it->sname) 176 CRYPTO_pop_info(); 177#endif 178 return 1; 179 } 180 } 181 if (!combine) { 182 *pval = OPENSSL_malloc(it->size); 183 if (!*pval) 184 goto memerr; 185 memset(*pval, 0, it->size); 186 asn1_do_lock(pval, 0, it); 187 asn1_enc_init(pval, it); 188 } 189 for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) { 190 pseqval = asn1_get_field_ptr(pval, tt); 191 if (!ASN1_template_new(pseqval, tt)) 192 goto memerr; 193 } 194 if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL)) 195 goto auxerr; 196 break; 197 } 198#ifdef CRYPTO_MDEBUG 199 if (it->sname) 200 CRYPTO_pop_info(); 201#endif 202 return 1; 203 204 memerr: 205 ASN1err(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW, ERR_R_MALLOC_FAILURE); 206#ifdef CRYPTO_MDEBUG 207 if (it->sname) 208 CRYPTO_pop_info(); 209#endif 210 return 0; 211 212 auxerr: 213 ASN1err(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW, ASN1_R_AUX_ERROR); 214 ASN1_item_ex_free(pval, it); 215#ifdef CRYPTO_MDEBUG 216 if (it->sname) 217 CRYPTO_pop_info(); 218#endif 219 return 0; 220 221} 222 223static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it) 224{ 225 const ASN1_EXTERN_FUNCS *ef; 226 227 switch (it->itype) { 228 229 case ASN1_ITYPE_EXTERN: 230 ef = it->funcs; 231 if (ef && ef->asn1_ex_clear) 232 ef->asn1_ex_clear(pval, it); 233 else 234 *pval = NULL; 235 break; 236 237 case ASN1_ITYPE_PRIMITIVE: 238 if (it->templates) 239 asn1_template_clear(pval, it->templates); 240 else 241 asn1_primitive_clear(pval, it); 242 break; 243 244 case ASN1_ITYPE_MSTRING: 245 asn1_primitive_clear(pval, it); 246 break; 247 248 case ASN1_ITYPE_COMPAT: 249 case ASN1_ITYPE_CHOICE: 250 case ASN1_ITYPE_SEQUENCE: 251 case ASN1_ITYPE_NDEF_SEQUENCE: 252 *pval = NULL; 253 break; 254 } 255} 256 257int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) 258{ 259 const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item); 260 int ret; 261 if (tt->flags & ASN1_TFLG_OPTIONAL) { 262 asn1_template_clear(pval, tt); 263 return 1; 264 } 265 /* If ANY DEFINED BY nothing to do */ 266 267 if (tt->flags & ASN1_TFLG_ADB_MASK) { 268 *pval = NULL; 269 return 1; 270 } 271#ifdef CRYPTO_MDEBUG 272 if (tt->field_name) 273 CRYPTO_push_info(tt->field_name); 274#endif 275 /* If SET OF or SEQUENCE OF, its a STACK */ 276 if (tt->flags & ASN1_TFLG_SK_MASK) { 277 STACK_OF(ASN1_VALUE) *skval; 278 skval = sk_ASN1_VALUE_new_null(); 279 if (!skval) { 280 ASN1err(ASN1_F_ASN1_TEMPLATE_NEW, ERR_R_MALLOC_FAILURE); 281 ret = 0; 282 goto done; 283 } 284 *pval = (ASN1_VALUE *)skval; 285 ret = 1; 286 goto done; 287 } 288 /* Otherwise pass it back to the item routine */ 289 ret = asn1_item_ex_combine_new(pval, it, tt->flags & ASN1_TFLG_COMBINE); 290 done: 291#ifdef CRYPTO_MDEBUG 292 if (it->sname) 293 CRYPTO_pop_info(); 294#endif 295 return ret; 296} 297 298static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) 299{ 300 /* If ADB or STACK just NULL the field */ 301 if (tt->flags & (ASN1_TFLG_ADB_MASK | ASN1_TFLG_SK_MASK)) 302 *pval = NULL; 303 else 304 asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item)); 305} 306 307/* 308 * NB: could probably combine most of the real XXX_new() behaviour and junk 309 * all the old functions. 310 */ 311 312int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it) 313{ 314 ASN1_TYPE *typ; 315 ASN1_STRING *str; 316 int utype; 317 318 if (!it) 319 return 0; 320 321 if (it->funcs) { 322 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs; 323 if (pf->prim_new) 324 return pf->prim_new(pval, it); 325 } 326 327 if (it->itype == ASN1_ITYPE_MSTRING) 328 utype = -1; 329 else 330 utype = it->utype; 331 switch (utype) { 332 case V_ASN1_OBJECT: 333 *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef); 334 return 1; 335 336 case V_ASN1_BOOLEAN: 337 *(ASN1_BOOLEAN *)pval = it->size; 338 return 1; 339 340 case V_ASN1_NULL: 341 *pval = (ASN1_VALUE *)1; 342 return 1; 343 344 case V_ASN1_ANY: 345 typ = OPENSSL_malloc(sizeof(ASN1_TYPE)); 346 if (!typ) 347 return 0; 348 typ->value.ptr = NULL; 349 typ->type = -1; 350 *pval = (ASN1_VALUE *)typ; 351 break; 352 353 default: 354 str = ASN1_STRING_type_new(utype); 355 if (it->itype == ASN1_ITYPE_MSTRING && str) 356 str->flags |= ASN1_STRING_FLAG_MSTRING; 357 *pval = (ASN1_VALUE *)str; 358 break; 359 } 360 if (*pval) 361 return 1; 362 return 0; 363} 364 365static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it) 366{ 367 int utype; 368 if (it && it->funcs) { 369 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs; 370 if (pf->prim_clear) 371 pf->prim_clear(pval, it); 372 else 373 *pval = NULL; 374 return; 375 } 376 if (!it || (it->itype == ASN1_ITYPE_MSTRING)) 377 utype = -1; 378 else 379 utype = it->utype; 380 if (utype == V_ASN1_BOOLEAN) 381 *(ASN1_BOOLEAN *)pval = it->size; 382 else 383 *pval = NULL; 384} 385