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| 1 /* ==================================================================== | |
| 2 * Copyright (c) 2001 The OpenSSL Project. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * | |
| 8 * 1. Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * | |
| 11 * 2. Redistributions in binary form must reproduce the above copyright | |
| 12 * notice, this list of conditions and the following disclaimer in | |
| 13 * the documentation and/or other materials provided with the | |
| 14 * distribution. | |
| 15 * | |
| 16 * 3. All advertising materials mentioning features or use of this | |
| 17 * software must display the following acknowledgment: | |
| 18 * "This product includes software developed by the OpenSSL Project | |
| 19 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
| 20 * | |
| 21 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
| 22 * endorse or promote products derived from this software without | |
| 23 * prior written permission. For written permission, please contact | |
| 24 * licensing@OpenSSL.org. | |
| 25 * | |
| 26 * 5. Products derived from this software may not be called "OpenSSL" | |
| 27 * nor may "OpenSSL" appear in their names without prior written | |
| 28 * permission of the OpenSSL Project. | |
| 29 * | |
| 30 * 6. Redistributions of any form whatsoever must retain the following | |
| 31 * acknowledgment: | |
| 32 * "This product includes software developed by the OpenSSL Project | |
| 33 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
| 34 * | |
| 35 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
| 36 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 37 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 38 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
| 39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 42 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 44 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 45 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
| 46 * OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 47 * ==================================================================== | |
| 48 * | |
| 49 * This product includes cryptographic software written by Eric Young | |
| 50 * (eay@cryptsoft.com). This product includes software written by Tim | |
| 51 * Hudson (tjh@cryptsoft.com). | |
| 52 * | |
| 53 */ | |
| 54 | |
| 55 #include "cryptlib.h" | |
| 56 #include <openssl/evp.h> | |
| 57 #include <openssl/lhash.h> | |
| 58 #include "eng_int.h" | |
| 59 | |
| 60 /* The type of the items in the table */ | |
| 61 typedef struct st_engine_pile | |
| 62 { | |
| 63 /* The 'nid' of this algorithm/mode */ | |
| 64 int nid; | |
| 65 /* ENGINEs that implement this algorithm/mode. */ | |
| 66 STACK_OF(ENGINE) *sk; | |
| 67 /* The default ENGINE to perform this algorithm/mode. */ | |
| 68 ENGINE *funct; | |
| 69 /* Zero if 'sk' is newer than the cached 'funct', non-zero otherwise */ | |
| 70 int uptodate; | |
| 71 } ENGINE_PILE; | |
| 72 | |
| 73 DECLARE_LHASH_OF(ENGINE_PILE); | |
| 74 | |
| 75 /* The type exposed in eng_int.h */ | |
| 76 struct st_engine_table | |
| 77 { | |
| 78 LHASH_OF(ENGINE_PILE) piles; | |
| 79 }; /* ENGINE_TABLE */ | |
| 80 | |
| 81 | |
| 82 typedef struct st_engine_pile_doall | |
| 83 { | |
| 84 engine_table_doall_cb *cb; | |
| 85 void *arg; | |
| 86 } ENGINE_PILE_DOALL; | |
| 87 | |
| 88 | |
| 89 /* Global flags (ENGINE_TABLE_FLAG_***). */ | |
| 90 static unsigned int table_flags = 0; | |
| 91 | |
| 92 /* API function manipulating 'table_flags' */ | |
| 93 unsigned int ENGINE_get_table_flags(void) | |
| 94 { | |
| 95 return table_flags; | |
| 96 } | |
| 97 | |
| 98 void ENGINE_set_table_flags(unsigned int flags) | |
| 99 { | |
| 100 table_flags = flags; | |
| 101 } | |
| 102 | |
| 103 /* Internal functions for the "piles" hash table */ | |
| 104 static unsigned long engine_pile_hash(const ENGINE_PILE *c) | |
| 105 { | |
| 106 return c->nid; | |
| 107 } | |
| 108 | |
| 109 static int engine_pile_cmp(const ENGINE_PILE *a, const ENGINE_PILE *b) | |
| 110 { | |
| 111 return a->nid - b->nid; | |
| 112 } | |
| 113 static IMPLEMENT_LHASH_HASH_FN(engine_pile, ENGINE_PILE) | |
| 114 static IMPLEMENT_LHASH_COMP_FN(engine_pile, ENGINE_PILE) | |
| 115 | |
| 116 static int int_table_check(ENGINE_TABLE **t, int create) | |
| 117 { | |
| 118 LHASH_OF(ENGINE_PILE) *lh; | |
| 119 | |
| 120 if(*t) return 1; | |
| 121 if(!create) return 0; | |
| 122 if((lh = lh_ENGINE_PILE_new()) == NULL) | |
| 123 return 0; | |
| 124 *t = (ENGINE_TABLE *)lh; | |
| 125 return 1; | |
| 126 } | |
| 127 | |
| 128 /* Privately exposed (via eng_int.h) functions for adding and/or removing | |
| 129 * ENGINEs from the implementation table */ | |
| 130 int engine_table_register(ENGINE_TABLE **table, ENGINE_CLEANUP_CB *cleanup, | |
| 131 ENGINE *e, const int *nids, int num_nids, int setdefault) | |
| 132 { | |
| 133 int ret = 0, added = 0; | |
| 134 ENGINE_PILE tmplate, *fnd; | |
| 135 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); | |
| 136 if(!(*table)) | |
| 137 added = 1; | |
| 138 if(!int_table_check(table, 1)) | |
| 139 goto end; | |
| 140 if(added) | |
| 141 /* The cleanup callback needs to be added */ | |
| 142 engine_cleanup_add_first(cleanup); | |
| 143 while(num_nids--) | |
| 144 { | |
| 145 tmplate.nid = *nids; | |
| 146 fnd = lh_ENGINE_PILE_retrieve(&(*table)->piles, &tmplate); | |
| 147 if(!fnd) | |
| 148 { | |
| 149 fnd = OPENSSL_malloc(sizeof(ENGINE_PILE)); | |
| 150 if(!fnd) goto end; | |
| 151 fnd->uptodate = 1; | |
| 152 fnd->nid = *nids; | |
| 153 fnd->sk = sk_ENGINE_new_null(); | |
| 154 if(!fnd->sk) | |
| 155 { | |
| 156 OPENSSL_free(fnd); | |
| 157 goto end; | |
| 158 } | |
| 159 fnd->funct = NULL; | |
| 160 (void)lh_ENGINE_PILE_insert(&(*table)->piles, fnd); | |
| 161 } | |
| 162 /* A registration shouldn't add duplciate entries */ | |
| 163 (void)sk_ENGINE_delete_ptr(fnd->sk, e); | |
| 164 /* if 'setdefault', this ENGINE goes to the head of the list */ | |
| 165 if(!sk_ENGINE_push(fnd->sk, e)) | |
| 166 goto end; | |
| 167 /* "touch" this ENGINE_PILE */ | |
| 168 fnd->uptodate = 0; | |
| 169 if(setdefault) | |
| 170 { | |
| 171 if(!engine_unlocked_init(e)) | |
| 172 { | |
| 173 ENGINEerr(ENGINE_F_ENGINE_TABLE_REGISTER, | |
| 174 ENGINE_R_INIT_FAILED); | |
| 175 goto end; | |
| 176 } | |
| 177 if(fnd->funct) | |
| 178 engine_unlocked_finish(fnd->funct, 0); | |
| 179 fnd->funct = e; | |
| 180 fnd->uptodate = 1; | |
| 181 } | |
| 182 nids++; | |
| 183 } | |
| 184 ret = 1; | |
| 185 end: | |
| 186 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); | |
| 187 return ret; | |
| 188 } | |
| 189 static void int_unregister_cb_doall_arg(ENGINE_PILE *pile, ENGINE *e) | |
| 190 { | |
| 191 int n; | |
| 192 /* Iterate the 'c->sk' stack removing any occurance of 'e' */ | |
| 193 while((n = sk_ENGINE_find(pile->sk, e)) >= 0) | |
| 194 { | |
| 195 (void)sk_ENGINE_delete(pile->sk, n); | |
| 196 pile->uptodate = 0; | |
| 197 } | |
| 198 if(pile->funct == e) | |
| 199 { | |
| 200 engine_unlocked_finish(e, 0); | |
| 201 pile->funct = NULL; | |
| 202 } | |
| 203 } | |
| 204 static IMPLEMENT_LHASH_DOALL_ARG_FN(int_unregister_cb, ENGINE_PILE, ENGINE) | |
| 205 | |
| 206 void engine_table_unregister(ENGINE_TABLE **table, ENGINE *e) | |
| 207 { | |
| 208 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); | |
| 209 if(int_table_check(table, 0)) | |
| 210 lh_ENGINE_PILE_doall_arg(&(*table)->piles, | |
| 211 LHASH_DOALL_ARG_FN(int_unregister_cb), | |
| 212 ENGINE, e); | |
| 213 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); | |
| 214 } | |
| 215 | |
| 216 static void int_cleanup_cb_doall(ENGINE_PILE *p) | |
| 217 { | |
| 218 sk_ENGINE_free(p->sk); | |
| 219 if(p->funct) | |
| 220 engine_unlocked_finish(p->funct, 0); | |
| 221 OPENSSL_free(p); | |
| 222 } | |
| 223 static IMPLEMENT_LHASH_DOALL_FN(int_cleanup_cb, ENGINE_PILE) | |
| 224 | |
| 225 void engine_table_cleanup(ENGINE_TABLE **table) | |
| 226 { | |
| 227 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); | |
| 228 if(*table) | |
| 229 { | |
| 230 lh_ENGINE_PILE_doall(&(*table)->piles, | |
| 231 LHASH_DOALL_FN(int_cleanup_cb)); | |
| 232 lh_ENGINE_PILE_free(&(*table)->piles); | |
| 233 *table = NULL; | |
| 234 } | |
| 235 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); | |
| 236 } | |
| 237 | |
| 238 /* return a functional reference for a given 'nid' */ | |
| 239 #ifndef ENGINE_TABLE_DEBUG | |
| 240 ENGINE *engine_table_select(ENGINE_TABLE **table, int nid) | |
| 241 #else | |
| 242 ENGINE *engine_table_select_tmp(ENGINE_TABLE **table, int nid, const char *f, in
t l) | |
| 243 #endif | |
| 244 { | |
| 245 ENGINE *ret = NULL; | |
| 246 ENGINE_PILE tmplate, *fnd=NULL; | |
| 247 int initres, loop = 0; | |
| 248 | |
| 249 if(!(*table)) | |
| 250 { | |
| 251 #ifdef ENGINE_TABLE_DEBUG | |
| 252 fprintf(stderr, "engine_table_dbg: %s:%d, nid=%d, nothing " | |
| 253 "registered!\n", f, l, nid); | |
| 254 #endif | |
| 255 return NULL; | |
| 256 } | |
| 257 ERR_set_mark(); | |
| 258 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); | |
| 259 /* Check again inside the lock otherwise we could race against cleanup | |
| 260 * operations. But don't worry about a fprintf(stderr). */ | |
| 261 if(!int_table_check(table, 0)) goto end; | |
| 262 tmplate.nid = nid; | |
| 263 fnd = lh_ENGINE_PILE_retrieve(&(*table)->piles, &tmplate); | |
| 264 if(!fnd) goto end; | |
| 265 if(fnd->funct && engine_unlocked_init(fnd->funct)) | |
| 266 { | |
| 267 #ifdef ENGINE_TABLE_DEBUG | |
| 268 fprintf(stderr, "engine_table_dbg: %s:%d, nid=%d, using " | |
| 269 "ENGINE '%s' cached\n", f, l, nid, fnd->funct->id); | |
| 270 #endif | |
| 271 ret = fnd->funct; | |
| 272 goto end; | |
| 273 } | |
| 274 if(fnd->uptodate) | |
| 275 { | |
| 276 ret = fnd->funct; | |
| 277 goto end; | |
| 278 } | |
| 279 trynext: | |
| 280 ret = sk_ENGINE_value(fnd->sk, loop++); | |
| 281 if(!ret) | |
| 282 { | |
| 283 #ifdef ENGINE_TABLE_DEBUG | |
| 284 fprintf(stderr, "engine_table_dbg: %s:%d, nid=%d, no " | |
| 285 "registered implementations would initialise\n", | |
| 286 f, l, nid); | |
| 287 #endif | |
| 288 goto end; | |
| 289 } | |
| 290 /* Try to initialise the ENGINE? */ | |
| 291 if((ret->funct_ref > 0) || !(table_flags & ENGINE_TABLE_FLAG_NOINIT)) | |
| 292 initres = engine_unlocked_init(ret); | |
| 293 else | |
| 294 initres = 0; | |
| 295 if(initres) | |
| 296 { | |
| 297 /* Update 'funct' */ | |
| 298 if((fnd->funct != ret) && engine_unlocked_init(ret)) | |
| 299 { | |
| 300 /* If there was a previous default we release it. */ | |
| 301 if(fnd->funct) | |
| 302 engine_unlocked_finish(fnd->funct, 0); | |
| 303 fnd->funct = ret; | |
| 304 #ifdef ENGINE_TABLE_DEBUG | |
| 305 fprintf(stderr, "engine_table_dbg: %s:%d, nid=%d, " | |
| 306 "setting default to '%s'\n", f, l, nid, ret->id)
; | |
| 307 #endif | |
| 308 } | |
| 309 #ifdef ENGINE_TABLE_DEBUG | |
| 310 fprintf(stderr, "engine_table_dbg: %s:%d, nid=%d, using " | |
| 311 "newly initialised '%s'\n", f, l, nid, ret->id); | |
| 312 #endif | |
| 313 goto end; | |
| 314 } | |
| 315 goto trynext; | |
| 316 end: | |
| 317 /* If it failed, it is unlikely to succeed again until some future | |
| 318 * registrations have taken place. In all cases, we cache. */ | |
| 319 if(fnd) fnd->uptodate = 1; | |
| 320 #ifdef ENGINE_TABLE_DEBUG | |
| 321 if(ret) | |
| 322 fprintf(stderr, "engine_table_dbg: %s:%d, nid=%d, caching " | |
| 323 "ENGINE '%s'\n", f, l, nid, ret->id); | |
| 324 else | |
| 325 fprintf(stderr, "engine_table_dbg: %s:%d, nid=%d, caching " | |
| 326 "'no matching ENGINE'\n", f, l, nid); | |
| 327 #endif | |
| 328 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); | |
| 329 /* Whatever happened, any failed init()s are not failures in this | |
| 330 * context, so clear our error state. */ | |
| 331 ERR_pop_to_mark(); | |
| 332 return ret; | |
| 333 } | |
| 334 | |
| 335 /* Table enumeration */ | |
| 336 | |
| 337 static void int_cb_doall_arg(ENGINE_PILE *pile, ENGINE_PILE_DOALL *dall) | |
| 338 { | |
| 339 dall->cb(pile->nid, pile->sk, pile->funct, dall->arg); | |
| 340 } | |
| 341 static IMPLEMENT_LHASH_DOALL_ARG_FN(int_cb, ENGINE_PILE,ENGINE_PILE_DOALL) | |
| 342 | |
| 343 void engine_table_doall(ENGINE_TABLE *table, engine_table_doall_cb *cb, | |
| 344 void *arg) | |
| 345 { | |
| 346 ENGINE_PILE_DOALL dall; | |
| 347 dall.cb = cb; | |
| 348 dall.arg = arg; | |
| 349 lh_ENGINE_PILE_doall_arg(&table->piles, LHASH_DOALL_ARG_FN(int_cb), | |
| 350 ENGINE_PILE_DOALL, &dall); | |
| 351 } | |
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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