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| 1 /* crypto/engine/eng_list.c */ | |
| 2 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL | |
| 3 * project 2000. | |
| 4 */ | |
| 5 /* ==================================================================== | |
| 6 * Copyright (c) 1999-2001 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 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. | |
| 60 * ECDH support in OpenSSL originally developed by | |
| 61 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. | |
| 62 */ | |
| 63 | |
| 64 #include "eng_int.h" | |
| 65 | |
| 66 /* The linked-list of pointers to engine types. engine_list_head | |
| 67 * incorporates an implicit structural reference but engine_list_tail | |
| 68 * does not - the latter is a computational niceity and only points | |
| 69 * to something that is already pointed to by its predecessor in the | |
| 70 * list (or engine_list_head itself). In the same way, the use of the | |
| 71 * "prev" pointer in each ENGINE is to save excessive list iteration, | |
| 72 * it doesn't correspond to an extra structural reference. Hence, | |
| 73 * engine_list_head, and each non-null "next" pointer account for | |
| 74 * the list itself assuming exactly 1 structural reference on each | |
| 75 * list member. */ | |
| 76 static ENGINE *engine_list_head = NULL; | |
| 77 static ENGINE *engine_list_tail = NULL; | |
| 78 | |
| 79 /* This cleanup function is only needed internally. If it should be called, we | |
| 80 * register it with the "ENGINE_cleanup()" stack to be called during cleanup. */ | |
| 81 | |
| 82 static void engine_list_cleanup(void) | |
| 83 { | |
| 84 ENGINE *iterator = engine_list_head; | |
| 85 | |
| 86 while(iterator != NULL) | |
| 87 { | |
| 88 ENGINE_remove(iterator); | |
| 89 iterator = engine_list_head; | |
| 90 } | |
| 91 return; | |
| 92 } | |
| 93 | |
| 94 /* These static functions starting with a lower case "engine_" always | |
| 95 * take place when CRYPTO_LOCK_ENGINE has been locked up. */ | |
| 96 static int engine_list_add(ENGINE *e) | |
| 97 { | |
| 98 int conflict = 0; | |
| 99 ENGINE *iterator = NULL; | |
| 100 | |
| 101 if(e == NULL) | |
| 102 { | |
| 103 ENGINEerr(ENGINE_F_ENGINE_LIST_ADD, | |
| 104 ERR_R_PASSED_NULL_PARAMETER); | |
| 105 return 0; | |
| 106 } | |
| 107 iterator = engine_list_head; | |
| 108 while(iterator && !conflict) | |
| 109 { | |
| 110 conflict = (strcmp(iterator->id, e->id) == 0); | |
| 111 iterator = iterator->next; | |
| 112 } | |
| 113 if(conflict) | |
| 114 { | |
| 115 ENGINEerr(ENGINE_F_ENGINE_LIST_ADD, | |
| 116 ENGINE_R_CONFLICTING_ENGINE_ID); | |
| 117 return 0; | |
| 118 } | |
| 119 if(engine_list_head == NULL) | |
| 120 { | |
| 121 /* We are adding to an empty list. */ | |
| 122 if(engine_list_tail) | |
| 123 { | |
| 124 ENGINEerr(ENGINE_F_ENGINE_LIST_ADD, | |
| 125 ENGINE_R_INTERNAL_LIST_ERROR); | |
| 126 return 0; | |
| 127 } | |
| 128 engine_list_head = e; | |
| 129 e->prev = NULL; | |
| 130 /* The first time the list allocates, we should register the | |
| 131 * cleanup. */ | |
| 132 engine_cleanup_add_last(engine_list_cleanup); | |
| 133 } | |
| 134 else | |
| 135 { | |
| 136 /* We are adding to the tail of an existing list. */ | |
| 137 if((engine_list_tail == NULL) || | |
| 138 (engine_list_tail->next != NULL)) | |
| 139 { | |
| 140 ENGINEerr(ENGINE_F_ENGINE_LIST_ADD, | |
| 141 ENGINE_R_INTERNAL_LIST_ERROR); | |
| 142 return 0; | |
| 143 } | |
| 144 engine_list_tail->next = e; | |
| 145 e->prev = engine_list_tail; | |
| 146 } | |
| 147 /* Having the engine in the list assumes a structural | |
| 148 * reference. */ | |
| 149 e->struct_ref++; | |
| 150 engine_ref_debug(e, 0, 1) | |
| 151 /* However it came to be, e is the last item in the list. */ | |
| 152 engine_list_tail = e; | |
| 153 e->next = NULL; | |
| 154 return 1; | |
| 155 } | |
| 156 | |
| 157 static int engine_list_remove(ENGINE *e) | |
| 158 { | |
| 159 ENGINE *iterator; | |
| 160 | |
| 161 if(e == NULL) | |
| 162 { | |
| 163 ENGINEerr(ENGINE_F_ENGINE_LIST_REMOVE, | |
| 164 ERR_R_PASSED_NULL_PARAMETER); | |
| 165 return 0; | |
| 166 } | |
| 167 /* We need to check that e is in our linked list! */ | |
| 168 iterator = engine_list_head; | |
| 169 while(iterator && (iterator != e)) | |
| 170 iterator = iterator->next; | |
| 171 if(iterator == NULL) | |
| 172 { | |
| 173 ENGINEerr(ENGINE_F_ENGINE_LIST_REMOVE, | |
| 174 ENGINE_R_ENGINE_IS_NOT_IN_LIST); | |
| 175 return 0; | |
| 176 } | |
| 177 /* un-link e from the chain. */ | |
| 178 if(e->next) | |
| 179 e->next->prev = e->prev; | |
| 180 if(e->prev) | |
| 181 e->prev->next = e->next; | |
| 182 /* Correct our head/tail if necessary. */ | |
| 183 if(engine_list_head == e) | |
| 184 engine_list_head = e->next; | |
| 185 if(engine_list_tail == e) | |
| 186 engine_list_tail = e->prev; | |
| 187 engine_free_util(e, 0); | |
| 188 return 1; | |
| 189 } | |
| 190 | |
| 191 /* Get the first/last "ENGINE" type available. */ | |
| 192 ENGINE *ENGINE_get_first(void) | |
| 193 { | |
| 194 ENGINE *ret; | |
| 195 | |
| 196 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); | |
| 197 ret = engine_list_head; | |
| 198 if(ret) | |
| 199 { | |
| 200 ret->struct_ref++; | |
| 201 engine_ref_debug(ret, 0, 1) | |
| 202 } | |
| 203 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); | |
| 204 return ret; | |
| 205 } | |
| 206 | |
| 207 ENGINE *ENGINE_get_last(void) | |
| 208 { | |
| 209 ENGINE *ret; | |
| 210 | |
| 211 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); | |
| 212 ret = engine_list_tail; | |
| 213 if(ret) | |
| 214 { | |
| 215 ret->struct_ref++; | |
| 216 engine_ref_debug(ret, 0, 1) | |
| 217 } | |
| 218 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); | |
| 219 return ret; | |
| 220 } | |
| 221 | |
| 222 /* Iterate to the next/previous "ENGINE" type (NULL = end of the list). */ | |
| 223 ENGINE *ENGINE_get_next(ENGINE *e) | |
| 224 { | |
| 225 ENGINE *ret = NULL; | |
| 226 if(e == NULL) | |
| 227 { | |
| 228 ENGINEerr(ENGINE_F_ENGINE_GET_NEXT, | |
| 229 ERR_R_PASSED_NULL_PARAMETER); | |
| 230 return 0; | |
| 231 } | |
| 232 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); | |
| 233 ret = e->next; | |
| 234 if(ret) | |
| 235 { | |
| 236 /* Return a valid structural refernce to the next ENGINE */ | |
| 237 ret->struct_ref++; | |
| 238 engine_ref_debug(ret, 0, 1) | |
| 239 } | |
| 240 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); | |
| 241 /* Release the structural reference to the previous ENGINE */ | |
| 242 ENGINE_free(e); | |
| 243 return ret; | |
| 244 } | |
| 245 | |
| 246 ENGINE *ENGINE_get_prev(ENGINE *e) | |
| 247 { | |
| 248 ENGINE *ret = NULL; | |
| 249 if(e == NULL) | |
| 250 { | |
| 251 ENGINEerr(ENGINE_F_ENGINE_GET_PREV, | |
| 252 ERR_R_PASSED_NULL_PARAMETER); | |
| 253 return 0; | |
| 254 } | |
| 255 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); | |
| 256 ret = e->prev; | |
| 257 if(ret) | |
| 258 { | |
| 259 /* Return a valid structural reference to the next ENGINE */ | |
| 260 ret->struct_ref++; | |
| 261 engine_ref_debug(ret, 0, 1) | |
| 262 } | |
| 263 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); | |
| 264 /* Release the structural reference to the previous ENGINE */ | |
| 265 ENGINE_free(e); | |
| 266 return ret; | |
| 267 } | |
| 268 | |
| 269 /* Add another "ENGINE" type into the list. */ | |
| 270 int ENGINE_add(ENGINE *e) | |
| 271 { | |
| 272 int to_return = 1; | |
| 273 if(e == NULL) | |
| 274 { | |
| 275 ENGINEerr(ENGINE_F_ENGINE_ADD, | |
| 276 ERR_R_PASSED_NULL_PARAMETER); | |
| 277 return 0; | |
| 278 } | |
| 279 if((e->id == NULL) || (e->name == NULL)) | |
| 280 { | |
| 281 ENGINEerr(ENGINE_F_ENGINE_ADD, | |
| 282 ENGINE_R_ID_OR_NAME_MISSING); | |
| 283 } | |
| 284 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); | |
| 285 if(!engine_list_add(e)) | |
| 286 { | |
| 287 ENGINEerr(ENGINE_F_ENGINE_ADD, | |
| 288 ENGINE_R_INTERNAL_LIST_ERROR); | |
| 289 to_return = 0; | |
| 290 } | |
| 291 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); | |
| 292 return to_return; | |
| 293 } | |
| 294 | |
| 295 /* Remove an existing "ENGINE" type from the array. */ | |
| 296 int ENGINE_remove(ENGINE *e) | |
| 297 { | |
| 298 int to_return = 1; | |
| 299 if(e == NULL) | |
| 300 { | |
| 301 ENGINEerr(ENGINE_F_ENGINE_REMOVE, | |
| 302 ERR_R_PASSED_NULL_PARAMETER); | |
| 303 return 0; | |
| 304 } | |
| 305 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); | |
| 306 if(!engine_list_remove(e)) | |
| 307 { | |
| 308 ENGINEerr(ENGINE_F_ENGINE_REMOVE, | |
| 309 ENGINE_R_INTERNAL_LIST_ERROR); | |
| 310 to_return = 0; | |
| 311 } | |
| 312 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); | |
| 313 return to_return; | |
| 314 } | |
| 315 | |
| 316 static void engine_cpy(ENGINE *dest, const ENGINE *src) | |
| 317 { | |
| 318 dest->id = src->id; | |
| 319 dest->name = src->name; | |
| 320 #ifndef OPENSSL_NO_RSA | |
| 321 dest->rsa_meth = src->rsa_meth; | |
| 322 #endif | |
| 323 #ifndef OPENSSL_NO_DSA | |
| 324 dest->dsa_meth = src->dsa_meth; | |
| 325 #endif | |
| 326 #ifndef OPENSSL_NO_DH | |
| 327 dest->dh_meth = src->dh_meth; | |
| 328 #endif | |
| 329 #ifndef OPENSSL_NO_ECDH | |
| 330 dest->ecdh_meth = src->ecdh_meth; | |
| 331 #endif | |
| 332 #ifndef OPENSSL_NO_ECDSA | |
| 333 dest->ecdsa_meth = src->ecdsa_meth; | |
| 334 #endif | |
| 335 dest->rand_meth = src->rand_meth; | |
| 336 dest->store_meth = src->store_meth; | |
| 337 dest->ciphers = src->ciphers; | |
| 338 dest->digests = src->digests; | |
| 339 dest->pkey_meths = src->pkey_meths; | |
| 340 dest->destroy = src->destroy; | |
| 341 dest->init = src->init; | |
| 342 dest->finish = src->finish; | |
| 343 dest->ctrl = src->ctrl; | |
| 344 dest->load_privkey = src->load_privkey; | |
| 345 dest->load_pubkey = src->load_pubkey; | |
| 346 dest->cmd_defns = src->cmd_defns; | |
| 347 dest->flags = src->flags; | |
| 348 } | |
| 349 | |
| 350 ENGINE *ENGINE_by_id(const char *id) | |
| 351 { | |
| 352 ENGINE *iterator; | |
| 353 char *load_dir = NULL; | |
| 354 if(id == NULL) | |
| 355 { | |
| 356 ENGINEerr(ENGINE_F_ENGINE_BY_ID, | |
| 357 ERR_R_PASSED_NULL_PARAMETER); | |
| 358 return NULL; | |
| 359 } | |
| 360 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); | |
| 361 iterator = engine_list_head; | |
| 362 while(iterator && (strcmp(id, iterator->id) != 0)) | |
| 363 iterator = iterator->next; | |
| 364 if(iterator) | |
| 365 { | |
| 366 /* We need to return a structural reference. If this is an | |
| 367 * ENGINE type that returns copies, make a duplicate - otherwise | |
| 368 * increment the existing ENGINE's reference count. */ | |
| 369 if(iterator->flags & ENGINE_FLAGS_BY_ID_COPY) | |
| 370 { | |
| 371 ENGINE *cp = ENGINE_new(); | |
| 372 if(!cp) | |
| 373 iterator = NULL; | |
| 374 else | |
| 375 { | |
| 376 engine_cpy(cp, iterator); | |
| 377 iterator = cp; | |
| 378 } | |
| 379 } | |
| 380 else | |
| 381 { | |
| 382 iterator->struct_ref++; | |
| 383 engine_ref_debug(iterator, 0, 1) | |
| 384 } | |
| 385 } | |
| 386 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); | |
| 387 #if 0 | |
| 388 if(iterator == NULL) | |
| 389 { | |
| 390 ENGINEerr(ENGINE_F_ENGINE_BY_ID, | |
| 391 ENGINE_R_NO_SUCH_ENGINE); | |
| 392 ERR_add_error_data(2, "id=", id); | |
| 393 } | |
| 394 return iterator; | |
| 395 #else | |
| 396 /* EEK! Experimental code starts */ | |
| 397 if(iterator) return iterator; | |
| 398 /* Prevent infinite recusrion if we're looking for the dynamic engine. *
/ | |
| 399 if (strcmp(id, "dynamic")) | |
| 400 { | |
| 401 #ifdef OPENSSL_SYS_VMS | |
| 402 if((load_dir = getenv("OPENSSL_ENGINES")) == 0) load_dir = "SSLR
OOT:[ENGINES]"; | |
| 403 #else | |
| 404 if((load_dir = getenv("OPENSSL_ENGINES")) == 0) load_dir = ENGIN
ESDIR; | |
| 405 #endif | |
| 406 iterator = ENGINE_by_id("dynamic"); | |
| 407 if(!iterator || !ENGINE_ctrl_cmd_string(iterator, "ID", id, 0) |
| | |
| 408 !ENGINE_ctrl_cmd_string(iterator, "DIR_LOAD", "2
", 0) || | |
| 409 !ENGINE_ctrl_cmd_string(iterator, "DIR_ADD", | |
| 410 load_dir, 0) || | |
| 411 !ENGINE_ctrl_cmd_string(iterator, "LOAD", NULL,
0)) | |
| 412 goto notfound; | |
| 413 return iterator; | |
| 414 } | |
| 415 notfound: | |
| 416 ENGINE_free(iterator); | |
| 417 ENGINEerr(ENGINE_F_ENGINE_BY_ID,ENGINE_R_NO_SUCH_ENGINE); | |
| 418 ERR_add_error_data(2, "id=", id); | |
| 419 return NULL; | |
| 420 /* EEK! Experimental code ends */ | |
| 421 #endif | |
| 422 } | |
| 423 | |
| 424 int ENGINE_up_ref(ENGINE *e) | |
| 425 { | |
| 426 if (e == NULL) | |
| 427 { | |
| 428 ENGINEerr(ENGINE_F_ENGINE_UP_REF,ERR_R_PASSED_NULL_PARAMETER); | |
| 429 return 0; | |
| 430 } | |
| 431 CRYPTO_add(&e->struct_ref,1,CRYPTO_LOCK_ENGINE); | |
| 432 return 1; | |
| 433 } | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master