1/* $OpenBSD: tasn_new.c,v 1.25 2023/07/28 10:00:10 tb Exp $ */ 2/* Written by Dr Stephen N Henson (steve@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@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@cryptsoft.com). This product includes software written by Tim 55 * Hudson (tjh@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#include "asn1_local.h" 68 69static int asn1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it); 70static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it); 71static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt); 72static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it); 73 74ASN1_VALUE * 75ASN1_item_new(const ASN1_ITEM *it) 76{ 77 ASN1_VALUE *ret = NULL; 78 if (ASN1_item_ex_new(&ret, it) > 0) 79 return ret; 80 return NULL; 81} 82LCRYPTO_ALIAS(ASN1_item_new); 83 84/* Allocate an ASN1 structure */ 85 86int 87ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it) 88{ 89 return asn1_item_ex_new(pval, it); 90} 91LCRYPTO_ALIAS(ASN1_item_ex_new); 92 93static int 94asn1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it) 95{ 96 const ASN1_TEMPLATE *tt = NULL; 97 const ASN1_EXTERN_FUNCS *ef; 98 const ASN1_AUX *aux = it->funcs; 99 ASN1_aux_cb *asn1_cb = NULL; 100 ASN1_VALUE **pseqval; 101 int i; 102 103 if (aux != NULL && aux->asn1_cb != NULL) 104 asn1_cb = aux->asn1_cb; 105 106 *pval = NULL; 107 108 switch (it->itype) { 109 case ASN1_ITYPE_EXTERN: 110 ef = it->funcs; 111 if (ef && ef->asn1_ex_new) { 112 if (!ef->asn1_ex_new(pval, it)) 113 goto memerr; 114 } 115 break; 116 117 case ASN1_ITYPE_PRIMITIVE: 118 if (it->templates) { 119 if (!ASN1_template_new(pval, it->templates)) 120 goto memerr; 121 } else if (!ASN1_primitive_new(pval, it)) 122 goto memerr; 123 break; 124 125 case ASN1_ITYPE_MSTRING: 126 if (!ASN1_primitive_new(pval, it)) 127 goto memerr; 128 break; 129 130 case ASN1_ITYPE_CHOICE: 131 if (asn1_cb) { 132 i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL); 133 if (!i) 134 goto auxerr; 135 if (i == 2) { 136 return 1; 137 } 138 } 139 *pval = calloc(1, it->size); 140 if (!*pval) 141 goto memerr; 142 asn1_set_choice_selector(pval, -1, it); 143 if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL)) 144 goto auxerr; 145 break; 146 147 case ASN1_ITYPE_NDEF_SEQUENCE: 148 case ASN1_ITYPE_SEQUENCE: 149 if (asn1_cb) { 150 i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL); 151 if (!i) 152 goto auxerr; 153 if (i == 2) { 154 return 1; 155 } 156 } 157 *pval = calloc(1, it->size); 158 if (!*pval) 159 goto memerr; 160 asn1_do_lock(pval, 0, it); 161 asn1_enc_init(pval, it); 162 for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) { 163 pseqval = asn1_get_field_ptr(pval, tt); 164 if (!ASN1_template_new(pseqval, tt)) 165 goto memerr; 166 } 167 if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL)) 168 goto auxerr; 169 break; 170 } 171 return 1; 172 173 memerr: 174 ASN1error(ERR_R_MALLOC_FAILURE); 175 return 0; 176 177 auxerr: 178 ASN1error(ASN1_R_AUX_ERROR); 179 ASN1_item_ex_free(pval, it); 180 return 0; 181 182} 183 184static void 185asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it) 186{ 187 const ASN1_EXTERN_FUNCS *ef; 188 189 switch (it->itype) { 190 case ASN1_ITYPE_EXTERN: 191 ef = it->funcs; 192 if (ef && ef->asn1_ex_clear) 193 ef->asn1_ex_clear(pval, it); 194 else 195 *pval = NULL; 196 break; 197 198 case ASN1_ITYPE_PRIMITIVE: 199 if (it->templates) 200 asn1_template_clear(pval, it->templates); 201 else 202 asn1_primitive_clear(pval, it); 203 break; 204 205 case ASN1_ITYPE_MSTRING: 206 asn1_primitive_clear(pval, it); 207 break; 208 209 case ASN1_ITYPE_CHOICE: 210 case ASN1_ITYPE_SEQUENCE: 211 case ASN1_ITYPE_NDEF_SEQUENCE: 212 *pval = NULL; 213 break; 214 } 215} 216 217int 218ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) 219{ 220 const ASN1_ITEM *it = tt->item; 221 int ret; 222 223 if (tt->flags & ASN1_TFLG_OPTIONAL) { 224 asn1_template_clear(pval, tt); 225 return 1; 226 } 227 /* If ANY DEFINED BY nothing to do */ 228 229 if (tt->flags & ASN1_TFLG_ADB_MASK) { 230 *pval = NULL; 231 return 1; 232 } 233 /* If SET OF or SEQUENCE OF, its a STACK */ 234 if (tt->flags & ASN1_TFLG_SK_MASK) { 235 STACK_OF(ASN1_VALUE) *skval; 236 skval = sk_ASN1_VALUE_new_null(); 237 if (!skval) { 238 ASN1error(ERR_R_MALLOC_FAILURE); 239 ret = 0; 240 goto done; 241 } 242 *pval = (ASN1_VALUE *)skval; 243 ret = 1; 244 goto done; 245 } 246 /* Otherwise pass it back to the item routine */ 247 ret = asn1_item_ex_new(pval, it); 248 done: 249 return ret; 250} 251 252static void 253asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) 254{ 255 /* If ADB or STACK just NULL the field */ 256 if (tt->flags & (ASN1_TFLG_ADB_MASK|ASN1_TFLG_SK_MASK)) 257 *pval = NULL; 258 else 259 asn1_item_clear(pval, tt->item); 260} 261 262 263/* NB: could probably combine most of the real XXX_new() behaviour and junk 264 * all the old functions. 265 */ 266 267int 268ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it) 269{ 270 ASN1_TYPE *typ; 271 ASN1_STRING *str; 272 int utype; 273 274 if (it != NULL && it->funcs != NULL) { 275 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs; 276 277 if (pf->prim_new == NULL) 278 return 0; 279 return pf->prim_new(pval, it); 280 } 281 282 if (!it || (it->itype == ASN1_ITYPE_MSTRING)) 283 utype = V_ASN1_UNDEF; 284 else 285 utype = it->utype; 286 switch (utype) { 287 case V_ASN1_OBJECT: 288 *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef); 289 return 1; 290 291 case V_ASN1_BOOLEAN: 292 *(ASN1_BOOLEAN *)pval = it->size; 293 return 1; 294 295 case V_ASN1_NULL: 296 *pval = (ASN1_VALUE *)1; 297 return 1; 298 299 case V_ASN1_ANY: 300 typ = malloc(sizeof(ASN1_TYPE)); 301 if (typ != NULL) { 302 typ->value.ptr = NULL; 303 typ->type = V_ASN1_UNDEF; 304 } 305 *pval = (ASN1_VALUE *)typ; 306 break; 307 308 default: 309 str = ASN1_STRING_type_new(utype); 310 if (it != NULL && it->itype == ASN1_ITYPE_MSTRING && 311 str != NULL) 312 str->flags |= ASN1_STRING_FLAG_MSTRING; 313 *pval = (ASN1_VALUE *)str; 314 break; 315 } 316 if (*pval) 317 return 1; 318 return 0; 319} 320 321static void 322asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it) 323{ 324 int utype; 325 326 if (it != NULL && it->funcs != NULL) { 327 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs; 328 329 if (pf->prim_clear) 330 pf->prim_clear(pval, it); 331 else 332 *pval = NULL; 333 return; 334 } 335 336 if (!it || (it->itype == ASN1_ITYPE_MSTRING)) 337 utype = V_ASN1_UNDEF; 338 else 339 utype = it->utype; 340 if (utype == V_ASN1_BOOLEAN) 341 *(ASN1_BOOLEAN *)pval = it->size; 342 else 343 *pval = NULL; 344} 345