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 static 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, 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 auxerr2; 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 memerr2; 190 } 191 if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL)) 192 goto auxerr2; 193 break; 194 } 195 #ifdef CRYPTO_MDEBUG 196 if (it->sname) 197 CRYPTO_pop_info(); 198 #endif 199 return 1; 200 201 memerr2: 202 ASN1_item_ex_free(pval, it); 203 memerr: 204 ASN1err(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW, ERR_R_MALLOC_FAILURE); 205 #ifdef CRYPTO_MDEBUG 206 if (it->sname) 207 CRYPTO_pop_info(); 208 #endif 209 return 0; 210 211 auxerr2: 212 ASN1_item_ex_free(pval, it); 213 auxerr: 214 ASN1err(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW, ASN1_R_AUX_ERROR); 215 #ifdef CRYPTO_MDEBUG 216 if (it->sname) 217 CRYPTO_pop_info(); 218 #endif 219 return 0; 220 221 } 222 223 static 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 } 256 257 int 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 } 297 298 static 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 */ 311 312 int 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 } 364 365 static 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