1 /* tasn_new.c */ 2 /* Written by Dr Stephen N Henson (steve (at) 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 (at) 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 (at) cryptsoft.com). This product includes software written by Tim 55 * Hudson (tjh (at) 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 } 396
