Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* tasn_new.c */ |
| 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 | 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 | 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, NULL); |
| 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, NULL)) |
| 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, NULL); |
| 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, NULL)) |
| 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 | ASN1_STRING *str; |
| 329 | int utype; |
| 330 | |
| 331 | if (it && it->funcs) |
| 332 | { |
| 333 | const ASN1_PRIMITIVE_FUNCS *pf = it->funcs; |
| 334 | if (pf->prim_new) |
| 335 | return pf->prim_new(pval, it); |
| 336 | } |
| 337 | |
| 338 | if (!it || (it->itype == ASN1_ITYPE_MSTRING)) |
| 339 | utype = -1; |
| 340 | else |
| 341 | utype = it->utype; |
| 342 | switch(utype) |
| 343 | { |
| 344 | case V_ASN1_OBJECT: |
| 345 | *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef); |
| 346 | return 1; |
| 347 | |
| 348 | case V_ASN1_BOOLEAN: |
| 349 | *(ASN1_BOOLEAN *)pval = it->size; |
| 350 | return 1; |
| 351 | |
| 352 | case V_ASN1_NULL: |
| 353 | *pval = (ASN1_VALUE *)1; |
| 354 | return 1; |
| 355 | |
| 356 | case V_ASN1_ANY: |
| 357 | typ = OPENSSL_malloc(sizeof(ASN1_TYPE)); |
| 358 | if (!typ) |
| 359 | return 0; |
| 360 | typ->value.ptr = NULL; |
| 361 | typ->type = -1; |
| 362 | *pval = (ASN1_VALUE *)typ; |
| 363 | break; |
| 364 | |
| 365 | default: |
| 366 | str = ASN1_STRING_type_new(utype); |
| 367 | if (it->itype == ASN1_ITYPE_MSTRING && str) |
| 368 | str->flags |= ASN1_STRING_FLAG_MSTRING; |
| 369 | *pval = (ASN1_VALUE *)str; |
| 370 | break; |
| 371 | } |
| 372 | if (*pval) |
| 373 | return 1; |
| 374 | return 0; |
| 375 | } |
| 376 | |
| 377 | static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it) |
| 378 | { |
| 379 | int utype; |
| 380 | if (it && it->funcs) |
| 381 | { |
| 382 | const ASN1_PRIMITIVE_FUNCS *pf = it->funcs; |
| 383 | if (pf->prim_clear) |
| 384 | pf->prim_clear(pval, it); |
| 385 | else |
| 386 | *pval = NULL; |
| 387 | return; |
| 388 | } |
| 389 | if (!it || (it->itype == ASN1_ITYPE_MSTRING)) |
| 390 | utype = -1; |
| 391 | else |
| 392 | utype = it->utype; |
| 393 | if (utype == V_ASN1_BOOLEAN) |
| 394 | *(ASN1_BOOLEAN *)pval = it->size; |
| 395 | else *pval = NULL; |
| 396 | } |