1 /* $OpenBSD: tasn_new.c,v 1.22 2022/05/10 05:19:22 jsing 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_locl.h" 68 69 static int asn1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it); 70 static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it); 71 static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt); 72 static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it); 73 74 ASN1_VALUE * 75 ASN1_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 } 82 83 /* Allocate an ASN1 structure */ 84 85 int 86 ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it) 87 { 88 return asn1_item_ex_new(pval, it); 89 } 90 91 static int 92 asn1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it) 93 { 94 const ASN1_TEMPLATE *tt = NULL; 95 const ASN1_EXTERN_FUNCS *ef; 96 const ASN1_AUX *aux = it->funcs; 97 ASN1_aux_cb *asn1_cb = NULL; 98 ASN1_VALUE **pseqval; 99 int i; 100 101 if (aux != NULL && aux->asn1_cb != NULL) 102 asn1_cb = aux->asn1_cb; 103 104 *pval = NULL; 105 106 switch (it->itype) { 107 case ASN1_ITYPE_EXTERN: 108 ef = it->funcs; 109 if (ef && ef->asn1_ex_new) { 110 if (!ef->asn1_ex_new(pval, it)) 111 goto memerr; 112 } 113 break; 114 115 case ASN1_ITYPE_PRIMITIVE: 116 if (it->templates) { 117 if (!ASN1_template_new(pval, it->templates)) 118 goto memerr; 119 } else if (!ASN1_primitive_new(pval, it)) 120 goto memerr; 121 break; 122 123 case ASN1_ITYPE_MSTRING: 124 if (!ASN1_primitive_new(pval, it)) 125 goto memerr; 126 break; 127 128 case ASN1_ITYPE_CHOICE: 129 if (asn1_cb) { 130 i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL); 131 if (!i) 132 goto auxerr; 133 if (i == 2) { 134 return 1; 135 } 136 } 137 *pval = calloc(1, it->size); 138 if (!*pval) 139 goto memerr; 140 asn1_set_choice_selector(pval, -1, it); 141 if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL)) 142 goto auxerr; 143 break; 144 145 case ASN1_ITYPE_NDEF_SEQUENCE: 146 case ASN1_ITYPE_SEQUENCE: 147 if (asn1_cb) { 148 i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL); 149 if (!i) 150 goto auxerr; 151 if (i == 2) { 152 return 1; 153 } 154 } 155 *pval = calloc(1, it->size); 156 if (!*pval) 157 goto memerr; 158 asn1_do_lock(pval, 0, it); 159 asn1_enc_init(pval, it); 160 for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) { 161 pseqval = asn1_get_field_ptr(pval, tt); 162 if (!ASN1_template_new(pseqval, tt)) 163 goto memerr; 164 } 165 if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL)) 166 goto auxerr; 167 break; 168 } 169 return 1; 170 171 memerr: 172 ASN1error(ERR_R_MALLOC_FAILURE); 173 return 0; 174 175 auxerr: 176 ASN1error(ASN1_R_AUX_ERROR); 177 ASN1_item_ex_free(pval, it); 178 return 0; 179 180 } 181 182 static void 183 asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it) 184 { 185 const ASN1_EXTERN_FUNCS *ef; 186 187 switch (it->itype) { 188 case ASN1_ITYPE_EXTERN: 189 ef = it->funcs; 190 if (ef && ef->asn1_ex_clear) 191 ef->asn1_ex_clear(pval, it); 192 else 193 *pval = NULL; 194 break; 195 196 case ASN1_ITYPE_PRIMITIVE: 197 if (it->templates) 198 asn1_template_clear(pval, it->templates); 199 else 200 asn1_primitive_clear(pval, it); 201 break; 202 203 case ASN1_ITYPE_MSTRING: 204 asn1_primitive_clear(pval, it); 205 break; 206 207 case ASN1_ITYPE_CHOICE: 208 case ASN1_ITYPE_SEQUENCE: 209 case ASN1_ITYPE_NDEF_SEQUENCE: 210 *pval = NULL; 211 break; 212 } 213 } 214 215 int 216 ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) 217 { 218 const ASN1_ITEM *it = tt->item; 219 int ret; 220 221 if (tt->flags & ASN1_TFLG_OPTIONAL) { 222 asn1_template_clear(pval, tt); 223 return 1; 224 } 225 /* If ANY DEFINED BY nothing to do */ 226 227 if (tt->flags & ASN1_TFLG_ADB_MASK) { 228 *pval = NULL; 229 return 1; 230 } 231 /* If SET OF or SEQUENCE OF, its a STACK */ 232 if (tt->flags & ASN1_TFLG_SK_MASK) { 233 STACK_OF(ASN1_VALUE) *skval; 234 skval = sk_ASN1_VALUE_new_null(); 235 if (!skval) { 236 ASN1error(ERR_R_MALLOC_FAILURE); 237 ret = 0; 238 goto done; 239 } 240 *pval = (ASN1_VALUE *)skval; 241 ret = 1; 242 goto done; 243 } 244 /* Otherwise pass it back to the item routine */ 245 ret = asn1_item_ex_new(pval, it); 246 done: 247 return ret; 248 } 249 250 static void 251 asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) 252 { 253 /* If ADB or STACK just NULL the field */ 254 if (tt->flags & (ASN1_TFLG_ADB_MASK|ASN1_TFLG_SK_MASK)) 255 *pval = NULL; 256 else 257 asn1_item_clear(pval, tt->item); 258 } 259 260 261 /* NB: could probably combine most of the real XXX_new() behaviour and junk 262 * all the old functions. 263 */ 264 265 int 266 ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it) 267 { 268 ASN1_TYPE *typ; 269 ASN1_STRING *str; 270 int utype; 271 272 if (it != NULL && it->funcs != NULL) { 273 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs; 274 275 if (pf->prim_new == NULL) 276 return 0; 277 return pf->prim_new(pval, it); 278 } 279 280 if (!it || (it->itype == ASN1_ITYPE_MSTRING)) 281 utype = V_ASN1_UNDEF; 282 else 283 utype = it->utype; 284 switch (utype) { 285 case V_ASN1_OBJECT: 286 *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef); 287 return 1; 288 289 case V_ASN1_BOOLEAN: 290 *(ASN1_BOOLEAN *)pval = it->size; 291 return 1; 292 293 case V_ASN1_NULL: 294 *pval = (ASN1_VALUE *)1; 295 return 1; 296 297 case V_ASN1_ANY: 298 typ = malloc(sizeof(ASN1_TYPE)); 299 if (typ != NULL) { 300 typ->value.ptr = NULL; 301 typ->type = V_ASN1_UNDEF; 302 } 303 *pval = (ASN1_VALUE *)typ; 304 break; 305 306 default: 307 str = ASN1_STRING_type_new(utype); 308 if (it != NULL && it->itype == ASN1_ITYPE_MSTRING && 309 str != NULL) 310 str->flags |= ASN1_STRING_FLAG_MSTRING; 311 *pval = (ASN1_VALUE *)str; 312 break; 313 } 314 if (*pval) 315 return 1; 316 return 0; 317 } 318 319 static void 320 asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it) 321 { 322 int utype; 323 324 if (it != NULL && it->funcs != NULL) { 325 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs; 326 327 if (pf->prim_clear) 328 pf->prim_clear(pval, it); 329 else 330 *pval = NULL; 331 return; 332 } 333 334 if (!it || (it->itype == ASN1_ITYPE_MSTRING)) 335 utype = V_ASN1_UNDEF; 336 else 337 utype = it->utype; 338 if (utype == V_ASN1_BOOLEAN) 339 *(ASN1_BOOLEAN *)pval = it->size; 340 else 341 *pval = NULL; 342 } 343