| OLD | NEW |
|---|
| (Empty) |
| 1 /* crypto/engine/eng_dyn.c */ | |
| 2 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL | |
| 3 * project 2001. | |
| 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 | |
| 60 #include "eng_int.h" | |
| 61 #include <openssl/dso.h> | |
| 62 | |
| 63 /* Shared libraries implementing ENGINEs for use by the "dynamic" ENGINE loader | |
| 64 * should implement the hook-up functions with the following prototypes. */ | |
| 65 | |
| 66 /* Our ENGINE handlers */ | |
| 67 static int dynamic_init(ENGINE *e); | |
| 68 static int dynamic_finish(ENGINE *e); | |
| 69 static int dynamic_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void)); | |
| 70 /* Predeclare our context type */ | |
| 71 typedef struct st_dynamic_data_ctx dynamic_data_ctx; | |
| 72 /* The implementation for the important control command */ | |
| 73 static int dynamic_load(ENGINE *e, dynamic_data_ctx *ctx); | |
| 74 | |
| 75 #define DYNAMIC_CMD_SO_PATH ENGINE_CMD_BASE | |
| 76 #define DYNAMIC_CMD_NO_VCHECK (ENGINE_CMD_BASE + 1) | |
| 77 #define DYNAMIC_CMD_ID (ENGINE_CMD_BASE + 2) | |
| 78 #define DYNAMIC_CMD_LIST_ADD (ENGINE_CMD_BASE + 3) | |
| 79 #define DYNAMIC_CMD_DIR_LOAD (ENGINE_CMD_BASE + 4) | |
| 80 #define DYNAMIC_CMD_DIR_ADD (ENGINE_CMD_BASE + 5) | |
| 81 #define DYNAMIC_CMD_LOAD (ENGINE_CMD_BASE + 6) | |
| 82 | |
| 83 /* The constants used when creating the ENGINE */ | |
| 84 static const char *engine_dynamic_id = "dynamic"; | |
| 85 static const char *engine_dynamic_name = "Dynamic engine loading support"; | |
| 86 static const ENGINE_CMD_DEFN dynamic_cmd_defns[] = { | |
| 87 {DYNAMIC_CMD_SO_PATH, | |
| 88 "SO_PATH", | |
| 89 "Specifies the path to the new ENGINE shared library", | |
| 90 ENGINE_CMD_FLAG_STRING}, | |
| 91 {DYNAMIC_CMD_NO_VCHECK, | |
| 92 "NO_VCHECK", | |
| 93 "Specifies to continue even if version checking fails (boolean)"
, | |
| 94 ENGINE_CMD_FLAG_NUMERIC}, | |
| 95 {DYNAMIC_CMD_ID, | |
| 96 "ID", | |
| 97 "Specifies an ENGINE id name for loading", | |
| 98 ENGINE_CMD_FLAG_STRING}, | |
| 99 {DYNAMIC_CMD_LIST_ADD, | |
| 100 "LIST_ADD", | |
| 101 "Whether to add a loaded ENGINE to the internal list (0=no,1=yes
,2=mandatory)", | |
| 102 ENGINE_CMD_FLAG_NUMERIC}, | |
| 103 {DYNAMIC_CMD_DIR_LOAD, | |
| 104 "DIR_LOAD", | |
| 105 "Specifies whether to load from 'DIR_ADD' directories (0=no,1=ye
s,2=mandatory)", | |
| 106 ENGINE_CMD_FLAG_NUMERIC}, | |
| 107 {DYNAMIC_CMD_DIR_ADD, | |
| 108 "DIR_ADD", | |
| 109 "Adds a directory from which ENGINEs can be loaded", | |
| 110 ENGINE_CMD_FLAG_STRING}, | |
| 111 {DYNAMIC_CMD_LOAD, | |
| 112 "LOAD", | |
| 113 "Load up the ENGINE specified by other settings", | |
| 114 ENGINE_CMD_FLAG_NO_INPUT}, | |
| 115 {0, NULL, NULL, 0} | |
| 116 }; | |
| 117 static const ENGINE_CMD_DEFN dynamic_cmd_defns_empty[] = { | |
| 118 {0, NULL, NULL, 0} | |
| 119 }; | |
| 120 | |
| 121 /* Loading code stores state inside the ENGINE structure via the "ex_data" | |
| 122 * element. We load all our state into a single structure and use that as a | |
| 123 * single context in the "ex_data" stack. */ | |
| 124 struct st_dynamic_data_ctx | |
| 125 { | |
| 126 /* The DSO object we load that supplies the ENGINE code */ | |
| 127 DSO *dynamic_dso; | |
| 128 /* The function pointer to the version checking shared library function
*/ | |
| 129 dynamic_v_check_fn v_check; | |
| 130 /* The function pointer to the engine-binding shared library function */ | |
| 131 dynamic_bind_engine bind_engine; | |
| 132 /* The default name/path for loading the shared library */ | |
| 133 const char *DYNAMIC_LIBNAME; | |
| 134 /* Whether to continue loading on a version check failure */ | |
| 135 int no_vcheck; | |
| 136 /* If non-NULL, stipulates the 'id' of the ENGINE to be loaded */ | |
| 137 const char *engine_id; | |
| 138 /* If non-zero, a successfully loaded ENGINE should be added to the inte
rnal | |
| 139 * ENGINE list. If 2, the add must succeed or the entire load should fai
l. */ | |
| 140 int list_add_value; | |
| 141 /* The symbol name for the version checking function */ | |
| 142 const char *DYNAMIC_F1; | |
| 143 /* The symbol name for the "initialise ENGINE structure" function */ | |
| 144 const char *DYNAMIC_F2; | |
| 145 /* Whether to never use 'dirs', use 'dirs' as a fallback, or only use | |
| 146 * 'dirs' for loading. Default is to use 'dirs' as a fallback. */ | |
| 147 int dir_load; | |
| 148 /* A stack of directories from which ENGINEs could be loaded */ | |
| 149 STACK_OF(OPENSSL_STRING) *dirs; | |
| 150 }; | |
| 151 | |
| 152 /* This is the "ex_data" index we obtain and reserve for use with our context | |
| 153 * structure. */ | |
| 154 static int dynamic_ex_data_idx = -1; | |
| 155 | |
| 156 static void int_free_str(char *s) { OPENSSL_free(s); } | |
| 157 /* Because our ex_data element may or may not get allocated depending on whether | |
| 158 * a "first-use" occurs before the ENGINE is freed, we have a memory leak | |
| 159 * problem to solve. We can't declare a "new" handler for the ex_data as we | |
| 160 * don't want a dynamic_data_ctx in *all* ENGINE structures of all types (this | |
| 161 * is a bug in the design of CRYPTO_EX_DATA). As such, we just declare a "free" | |
| 162 * handler and that will get called if an ENGINE is being destroyed and there | |
| 163 * was an ex_data element corresponding to our context type. */ | |
| 164 static void dynamic_data_ctx_free_func(void *parent, void *ptr, | |
| 165 CRYPTO_EX_DATA *ad, int idx, long argl, void *argp) | |
| 166 { | |
| 167 if(ptr) | |
| 168 { | |
| 169 dynamic_data_ctx *ctx = (dynamic_data_ctx *)ptr; | |
| 170 if(ctx->dynamic_dso) | |
| 171 DSO_free(ctx->dynamic_dso); | |
| 172 if(ctx->DYNAMIC_LIBNAME) | |
| 173 OPENSSL_free((void*)ctx->DYNAMIC_LIBNAME); | |
| 174 if(ctx->engine_id) | |
| 175 OPENSSL_free((void*)ctx->engine_id); | |
| 176 if(ctx->dirs) | |
| 177 sk_OPENSSL_STRING_pop_free(ctx->dirs, int_free_str); | |
| 178 OPENSSL_free(ctx); | |
| 179 } | |
| 180 } | |
| 181 | |
| 182 /* Construct the per-ENGINE context. We create it blindly and then use a lock to | |
| 183 * check for a race - if so, all but one of the threads "racing" will have | |
| 184 * wasted their time. The alternative involves creating everything inside the | |
| 185 * lock which is far worse. */ | |
| 186 static int dynamic_set_data_ctx(ENGINE *e, dynamic_data_ctx **ctx) | |
| 187 { | |
| 188 dynamic_data_ctx *c; | |
| 189 c = OPENSSL_malloc(sizeof(dynamic_data_ctx)); | |
| 190 if(!c) | |
| 191 { | |
| 192 ENGINEerr(ENGINE_F_DYNAMIC_SET_DATA_CTX,ERR_R_MALLOC_FAILURE); | |
| 193 return 0; | |
| 194 } | |
| 195 memset(c, 0, sizeof(dynamic_data_ctx)); | |
| 196 c->dynamic_dso = NULL; | |
| 197 c->v_check = NULL; | |
| 198 c->bind_engine = NULL; | |
| 199 c->DYNAMIC_LIBNAME = NULL; | |
| 200 c->no_vcheck = 0; | |
| 201 c->engine_id = NULL; | |
| 202 c->list_add_value = 0; | |
| 203 c->DYNAMIC_F1 = "v_check"; | |
| 204 c->DYNAMIC_F2 = "bind_engine"; | |
| 205 c->dir_load = 1; | |
| 206 c->dirs = sk_OPENSSL_STRING_new_null(); | |
| 207 if(!c->dirs) | |
| 208 { | |
| 209 ENGINEerr(ENGINE_F_DYNAMIC_SET_DATA_CTX,ERR_R_MALLOC_FAILURE); | |
| 210 OPENSSL_free(c); | |
| 211 return 0; | |
| 212 } | |
| 213 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); | |
| 214 if((*ctx = (dynamic_data_ctx *)ENGINE_get_ex_data(e, | |
| 215 dynamic_ex_data_idx)) == NULL) | |
| 216 { | |
| 217 /* Good, we're the first */ | |
| 218 ENGINE_set_ex_data(e, dynamic_ex_data_idx, c); | |
| 219 *ctx = c; | |
| 220 c = NULL; | |
| 221 } | |
| 222 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); | |
| 223 /* If we lost the race to set the context, c is non-NULL and *ctx is the | |
| 224 * context of the thread that won. */ | |
| 225 if(c) | |
| 226 OPENSSL_free(c); | |
| 227 return 1; | |
| 228 } | |
| 229 | |
| 230 /* This function retrieves the context structure from an ENGINE's "ex_data", or | |
| 231 * if it doesn't exist yet, sets it up. */ | |
| 232 static dynamic_data_ctx *dynamic_get_data_ctx(ENGINE *e) | |
| 233 { | |
| 234 dynamic_data_ctx *ctx; | |
| 235 if(dynamic_ex_data_idx < 0) | |
| 236 { | |
| 237 /* Create and register the ENGINE ex_data, and associate our | |
| 238 * "free" function with it to ensure any allocated contexts get | |
| 239 * freed when an ENGINE goes underground. */ | |
| 240 int new_idx = ENGINE_get_ex_new_index(0, NULL, NULL, NULL, | |
| 241 dynamic_data_ctx_free_func); | |
| 242 if(new_idx == -1) | |
| 243 { | |
| 244 ENGINEerr(ENGINE_F_DYNAMIC_GET_DATA_CTX,ENGINE_R_NO_INDE
X); | |
| 245 return NULL; | |
| 246 } | |
| 247 CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); | |
| 248 /* Avoid a race by checking again inside this lock */ | |
| 249 if(dynamic_ex_data_idx < 0) | |
| 250 { | |
| 251 /* Good, someone didn't beat us to it */ | |
| 252 dynamic_ex_data_idx = new_idx; | |
| 253 new_idx = -1; | |
| 254 } | |
| 255 CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); | |
| 256 /* In theory we could "give back" the index here if | |
| 257 * (new_idx>-1), but it's not possible and wouldn't gain us much | |
| 258 * if it were. */ | |
| 259 } | |
| 260 ctx = (dynamic_data_ctx *)ENGINE_get_ex_data(e, dynamic_ex_data_idx); | |
| 261 /* Check if the context needs to be created */ | |
| 262 if((ctx == NULL) && !dynamic_set_data_ctx(e, &ctx)) | |
| 263 /* "set_data" will set errors if necessary */ | |
| 264 return NULL; | |
| 265 return ctx; | |
| 266 } | |
| 267 | |
| 268 static ENGINE *engine_dynamic(void) | |
| 269 { | |
| 270 ENGINE *ret = ENGINE_new(); | |
| 271 if(!ret) | |
| 272 return NULL; | |
| 273 if(!ENGINE_set_id(ret, engine_dynamic_id) || | |
| 274 !ENGINE_set_name(ret, engine_dynamic_name) || | |
| 275 !ENGINE_set_init_function(ret, dynamic_init) || | |
| 276 !ENGINE_set_finish_function(ret, dynamic_finish) || | |
| 277 !ENGINE_set_ctrl_function(ret, dynamic_ctrl) || | |
| 278 !ENGINE_set_flags(ret, ENGINE_FLAGS_BY_ID_COPY) || | |
| 279 !ENGINE_set_cmd_defns(ret, dynamic_cmd_defns)) | |
| 280 { | |
| 281 ENGINE_free(ret); | |
| 282 return NULL; | |
| 283 } | |
| 284 return ret; | |
| 285 } | |
| 286 | |
| 287 void ENGINE_load_dynamic(void) | |
| 288 { | |
| 289 ENGINE *toadd = engine_dynamic(); | |
| 290 if(!toadd) return; | |
| 291 ENGINE_add(toadd); | |
| 292 /* If the "add" worked, it gets a structural reference. So either way, | |
| 293 * we release our just-created reference. */ | |
| 294 ENGINE_free(toadd); | |
| 295 /* If the "add" didn't work, it was probably a conflict because it was | |
| 296 * already added (eg. someone calling ENGINE_load_blah then calling | |
| 297 * ENGINE_load_builtin_engines() perhaps). */ | |
| 298 ERR_clear_error(); | |
| 299 } | |
| 300 | |
| 301 static int dynamic_init(ENGINE *e) | |
| 302 { | |
| 303 /* We always return failure - the "dyanamic" engine itself can't be used | |
| 304 * for anything. */ | |
| 305 return 0; | |
| 306 } | |
| 307 | |
| 308 static int dynamic_finish(ENGINE *e) | |
| 309 { | |
| 310 /* This should never be called on account of "dynamic_init" always | |
| 311 * failing. */ | |
| 312 return 0; | |
| 313 } | |
| 314 | |
| 315 static int dynamic_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void)) | |
| 316 { | |
| 317 dynamic_data_ctx *ctx = dynamic_get_data_ctx(e); | |
| 318 int initialised; | |
| 319 | |
| 320 if(!ctx) | |
| 321 { | |
| 322 ENGINEerr(ENGINE_F_DYNAMIC_CTRL,ENGINE_R_NOT_LOADED); | |
| 323 return 0; | |
| 324 } | |
| 325 initialised = ((ctx->dynamic_dso == NULL) ? 0 : 1); | |
| 326 /* All our control commands require the ENGINE to be uninitialised */ | |
| 327 if(initialised) | |
| 328 { | |
| 329 ENGINEerr(ENGINE_F_DYNAMIC_CTRL, | |
| 330 ENGINE_R_ALREADY_LOADED); | |
| 331 return 0; | |
| 332 } | |
| 333 switch(cmd) | |
| 334 { | |
| 335 case DYNAMIC_CMD_SO_PATH: | |
| 336 /* a NULL 'p' or a string of zero-length is the same thing */ | |
| 337 if(p && (strlen((const char *)p) < 1)) | |
| 338 p = NULL; | |
| 339 if(ctx->DYNAMIC_LIBNAME) | |
| 340 OPENSSL_free((void*)ctx->DYNAMIC_LIBNAME); | |
| 341 if(p) | |
| 342 ctx->DYNAMIC_LIBNAME = BUF_strdup(p); | |
| 343 else | |
| 344 ctx->DYNAMIC_LIBNAME = NULL; | |
| 345 return (ctx->DYNAMIC_LIBNAME ? 1 : 0); | |
| 346 case DYNAMIC_CMD_NO_VCHECK: | |
| 347 ctx->no_vcheck = ((i == 0) ? 0 : 1); | |
| 348 return 1; | |
| 349 case DYNAMIC_CMD_ID: | |
| 350 /* a NULL 'p' or a string of zero-length is the same thing */ | |
| 351 if(p && (strlen((const char *)p) < 1)) | |
| 352 p = NULL; | |
| 353 if(ctx->engine_id) | |
| 354 OPENSSL_free((void*)ctx->engine_id); | |
| 355 if(p) | |
| 356 ctx->engine_id = BUF_strdup(p); | |
| 357 else | |
| 358 ctx->engine_id = NULL; | |
| 359 return (ctx->engine_id ? 1 : 0); | |
| 360 case DYNAMIC_CMD_LIST_ADD: | |
| 361 if((i < 0) || (i > 2)) | |
| 362 { | |
| 363 ENGINEerr(ENGINE_F_DYNAMIC_CTRL, | |
| 364 ENGINE_R_INVALID_ARGUMENT); | |
| 365 return 0; | |
| 366 } | |
| 367 ctx->list_add_value = (int)i; | |
| 368 return 1; | |
| 369 case DYNAMIC_CMD_LOAD: | |
| 370 return dynamic_load(e, ctx); | |
| 371 case DYNAMIC_CMD_DIR_LOAD: | |
| 372 if((i < 0) || (i > 2)) | |
| 373 { | |
| 374 ENGINEerr(ENGINE_F_DYNAMIC_CTRL, | |
| 375 ENGINE_R_INVALID_ARGUMENT); | |
| 376 return 0; | |
| 377 } | |
| 378 ctx->dir_load = (int)i; | |
| 379 return 1; | |
| 380 case DYNAMIC_CMD_DIR_ADD: | |
| 381 /* a NULL 'p' or a string of zero-length is the same thing */ | |
| 382 if(!p || (strlen((const char *)p) < 1)) | |
| 383 { | |
| 384 ENGINEerr(ENGINE_F_DYNAMIC_CTRL, | |
| 385 ENGINE_R_INVALID_ARGUMENT); | |
| 386 return 0; | |
| 387 } | |
| 388 { | |
| 389 char *tmp_str = BUF_strdup(p); | |
| 390 if(!tmp_str) | |
| 391 { | |
| 392 ENGINEerr(ENGINE_F_DYNAMIC_CTRL, | |
| 393 ERR_R_MALLOC_FAILURE); | |
| 394 return 0; | |
| 395 } | |
| 396 sk_OPENSSL_STRING_insert(ctx->dirs, tmp_str, -1); | |
| 397 } | |
| 398 return 1; | |
| 399 default: | |
| 400 break; | |
| 401 } | |
| 402 ENGINEerr(ENGINE_F_DYNAMIC_CTRL,ENGINE_R_CTRL_COMMAND_NOT_IMPLEMENTED); | |
| 403 return 0; | |
| 404 } | |
| 405 | |
| 406 static int int_load(dynamic_data_ctx *ctx) | |
| 407 { | |
| 408 int num, loop; | |
| 409 /* Unless told not to, try a direct load */ | |
| 410 if((ctx->dir_load != 2) && (DSO_load(ctx->dynamic_dso, | |
| 411 ctx->DYNAMIC_LIBNAME, NULL, 0) != NULL)) | |
| 412 return 1; | |
| 413 /* If we're not allowed to use 'dirs' or we have none, fail */ | |
| 414 if(!ctx->dir_load || (num = sk_OPENSSL_STRING_num(ctx->dirs)) < 1) | |
| 415 return 0; | |
| 416 for(loop = 0; loop < num; loop++) | |
| 417 { | |
| 418 const char *s = sk_OPENSSL_STRING_value(ctx->dirs, loop); | |
| 419 char *merge = DSO_merge(ctx->dynamic_dso, ctx->DYNAMIC_LIBNAME,
s); | |
| 420 if(!merge) | |
| 421 return 0; | |
| 422 if(DSO_load(ctx->dynamic_dso, merge, NULL, 0)) | |
| 423 { | |
| 424 /* Found what we're looking for */ | |
| 425 OPENSSL_free(merge); | |
| 426 /* Previous failed loop iterations, if any, will have re
sulted in | |
| 427 * errors. Clear them out before returning success. */ | |
| 428 ERR_clear_error(); | |
| 429 return 1; | |
| 430 } | |
| 431 OPENSSL_free(merge); | |
| 432 } | |
| 433 return 0; | |
| 434 } | |
| 435 | |
| 436 static int dynamic_load(ENGINE *e, dynamic_data_ctx *ctx) | |
| 437 { | |
| 438 ENGINE cpy; | |
| 439 dynamic_fns fns; | |
| 440 | |
| 441 if(!ctx->dynamic_dso) | |
| 442 ctx->dynamic_dso = DSO_new(); | |
| 443 if(!ctx->DYNAMIC_LIBNAME) | |
| 444 { | |
| 445 if(!ctx->engine_id) | |
| 446 return 0; | |
| 447 ctx->DYNAMIC_LIBNAME = | |
| 448 DSO_convert_filename(ctx->dynamic_dso, ctx->engine_id); | |
| 449 } | |
| 450 if(!int_load(ctx)) | |
| 451 { | |
| 452 ENGINEerr(ENGINE_F_DYNAMIC_LOAD, | |
| 453 ENGINE_R_DSO_NOT_FOUND); | |
| 454 DSO_free(ctx->dynamic_dso); | |
| 455 ctx->dynamic_dso = NULL; | |
| 456 return 0; | |
| 457 } | |
| 458 /* We have to find a bind function otherwise it'll always end badly */ | |
| 459 if(!(ctx->bind_engine = (dynamic_bind_engine)DSO_bind_func( | |
| 460 ctx->dynamic_dso, ctx->DYNAMIC_F2))) | |
| 461 { | |
| 462 ctx->bind_engine = NULL; | |
| 463 DSO_free(ctx->dynamic_dso); | |
| 464 ctx->dynamic_dso = NULL; | |
| 465 ENGINEerr(ENGINE_F_DYNAMIC_LOAD, | |
| 466 ENGINE_R_DSO_FAILURE); | |
| 467 return 0; | |
| 468 } | |
| 469 /* Do we perform version checking? */ | |
| 470 if(!ctx->no_vcheck) | |
| 471 { | |
| 472 unsigned long vcheck_res = 0; | |
| 473 /* Now we try to find a version checking function and decide how | |
| 474 * to cope with failure if/when it fails. */ | |
| 475 ctx->v_check = (dynamic_v_check_fn)DSO_bind_func( | |
| 476 ctx->dynamic_dso, ctx->DYNAMIC_F1); | |
| 477 if(ctx->v_check) | |
| 478 vcheck_res = ctx->v_check(OSSL_DYNAMIC_VERSION); | |
| 479 /* We fail if the version checker veto'd the load *or* if it is | |
| 480 * deferring to us (by returning its version) and we think it is | |
| 481 * too old. */ | |
| 482 if(vcheck_res < OSSL_DYNAMIC_OLDEST) | |
| 483 { | |
| 484 /* Fail */ | |
| 485 ctx->bind_engine = NULL; | |
| 486 ctx->v_check = NULL; | |
| 487 DSO_free(ctx->dynamic_dso); | |
| 488 ctx->dynamic_dso = NULL; | |
| 489 ENGINEerr(ENGINE_F_DYNAMIC_LOAD, | |
| 490 ENGINE_R_VERSION_INCOMPATIBILITY); | |
| 491 return 0; | |
| 492 } | |
| 493 } | |
| 494 /* First binary copy the ENGINE structure so that we can roll back if | |
| 495 * the hand-over fails */ | |
| 496 memcpy(&cpy, e, sizeof(ENGINE)); | |
| 497 /* Provide the ERR, "ex_data", memory, and locking callbacks so the | |
| 498 * loaded library uses our state rather than its own. FIXME: As noted in | |
| 499 * engine.h, much of this would be simplified if each area of code | |
| 500 * provided its own "summary" structure of all related callbacks. It | |
| 501 * would also increase opaqueness. */ | |
| 502 fns.static_state = ENGINE_get_static_state(); | |
| 503 fns.err_fns = ERR_get_implementation(); | |
| 504 fns.ex_data_fns = CRYPTO_get_ex_data_implementation(); | |
| 505 CRYPTO_get_mem_functions(&fns.mem_fns.malloc_cb, | |
| 506 &fns.mem_fns.realloc_cb, | |
| 507 &fns.mem_fns.free_cb); | |
| 508 fns.lock_fns.lock_locking_cb = CRYPTO_get_locking_callback(); | |
| 509 fns.lock_fns.lock_add_lock_cb = CRYPTO_get_add_lock_callback(); | |
| 510 fns.lock_fns.dynlock_create_cb = CRYPTO_get_dynlock_create_callback(); | |
| 511 fns.lock_fns.dynlock_lock_cb = CRYPTO_get_dynlock_lock_callback(); | |
| 512 fns.lock_fns.dynlock_destroy_cb = CRYPTO_get_dynlock_destroy_callback(); | |
| 513 /* Now that we've loaded the dynamic engine, make sure no "dynamic" | |
| 514 * ENGINE elements will show through. */ | |
| 515 engine_set_all_null(e); | |
| 516 | |
| 517 /* Try to bind the ENGINE onto our own ENGINE structure */ | |
| 518 if(!ctx->bind_engine(e, ctx->engine_id, &fns)) | |
| 519 { | |
| 520 ctx->bind_engine = NULL; | |
| 521 ctx->v_check = NULL; | |
| 522 DSO_free(ctx->dynamic_dso); | |
| 523 ctx->dynamic_dso = NULL; | |
| 524 ENGINEerr(ENGINE_F_DYNAMIC_LOAD,ENGINE_R_INIT_FAILED); | |
| 525 /* Copy the original ENGINE structure back */ | |
| 526 memcpy(e, &cpy, sizeof(ENGINE)); | |
| 527 return 0; | |
| 528 } | |
| 529 /* Do we try to add this ENGINE to the internal list too? */ | |
| 530 if(ctx->list_add_value > 0) | |
| 531 { | |
| 532 if(!ENGINE_add(e)) | |
| 533 { | |
| 534 /* Do we tolerate this or fail? */ | |
| 535 if(ctx->list_add_value > 1) | |
| 536 { | |
| 537 /* Fail - NB: By this time, it's too late to | |
| 538 * rollback, and trying to do so allows the | |
| 539 * bind_engine() code to have created leaks. We | |
| 540 * just have to fail where we are, after the | |
| 541 * ENGINE has changed. */ | |
| 542 ENGINEerr(ENGINE_F_DYNAMIC_LOAD, | |
| 543 ENGINE_R_CONFLICTING_ENGINE_ID); | |
| 544 return 0; | |
| 545 } | |
| 546 /* Tolerate */ | |
| 547 ERR_clear_error(); | |
| 548 } | |
| 549 } | |
| 550 return 1; | |
| 551 } | |
| OLD | NEW |
|---|
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