eng_lib.c revision 296465
1/* crypto/engine/eng_lib.c */ 2/* 3 * Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project 4 * 2000. 5 */ 6/* ==================================================================== 7 * Copyright (c) 1999-2001 The OpenSSL Project. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. All advertising materials mentioning features or use of this 22 * software must display the following acknowledgment: 23 * "This product includes software developed by the OpenSSL Project 24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 25 * 26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 27 * endorse or promote products derived from this software without 28 * prior written permission. For written permission, please contact 29 * licensing@OpenSSL.org. 30 * 31 * 5. Products derived from this software may not be called "OpenSSL" 32 * nor may "OpenSSL" appear in their names without prior written 33 * permission of the OpenSSL Project. 34 * 35 * 6. Redistributions of any form whatsoever must retain the following 36 * acknowledgment: 37 * "This product includes software developed by the OpenSSL Project 38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 51 * OF THE POSSIBILITY OF SUCH DAMAGE. 52 * ==================================================================== 53 * 54 * This product includes cryptographic software written by Eric Young 55 * (eay@cryptsoft.com). This product includes software written by Tim 56 * Hudson (tjh@cryptsoft.com). 57 * 58 */ 59 60#include "eng_int.h" 61#include <openssl/rand.h> 62 63/* The "new"/"free" stuff first */ 64 65ENGINE *ENGINE_new(void) 66{ 67 ENGINE *ret; 68 69 ret = (ENGINE *)OPENSSL_malloc(sizeof(ENGINE)); 70 if (ret == NULL) { 71 ENGINEerr(ENGINE_F_ENGINE_NEW, ERR_R_MALLOC_FAILURE); 72 return NULL; 73 } 74 memset(ret, 0, sizeof(ENGINE)); 75 ret->struct_ref = 1; 76 engine_ref_debug(ret, 0, 1) 77 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ENGINE, ret, &ret->ex_data); 78 return ret; 79} 80 81/* 82 * Placed here (close proximity to ENGINE_new) so that modifications to the 83 * elements of the ENGINE structure are more likely to be caught and changed 84 * here. 85 */ 86void engine_set_all_null(ENGINE *e) 87{ 88 e->id = NULL; 89 e->name = NULL; 90 e->rsa_meth = NULL; 91 e->dsa_meth = NULL; 92 e->dh_meth = NULL; 93 e->rand_meth = NULL; 94 e->store_meth = NULL; 95 e->ciphers = NULL; 96 e->digests = NULL; 97 e->destroy = NULL; 98 e->init = NULL; 99 e->finish = NULL; 100 e->ctrl = NULL; 101 e->load_privkey = NULL; 102 e->load_pubkey = NULL; 103 e->cmd_defns = NULL; 104 e->flags = 0; 105} 106 107int engine_free_util(ENGINE *e, int locked) 108{ 109 int i; 110 111 if (e == NULL) { 112 ENGINEerr(ENGINE_F_ENGINE_FREE_UTIL, ERR_R_PASSED_NULL_PARAMETER); 113 return 0; 114 } 115 if (locked) 116 i = CRYPTO_add(&e->struct_ref, -1, CRYPTO_LOCK_ENGINE); 117 else 118 i = --e->struct_ref; 119 engine_ref_debug(e, 0, -1) 120 if (i > 0) 121 return 1; 122#ifdef REF_CHECK 123 if (i < 0) { 124 fprintf(stderr, "ENGINE_free, bad structural reference count\n"); 125 abort(); 126 } 127#endif 128 /* 129 * Give the ENGINE a chance to do any structural cleanup corresponding to 130 * allocation it did in its constructor (eg. unload error strings) 131 */ 132 if (e->destroy) 133 e->destroy(e); 134 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ENGINE, e, &e->ex_data); 135 OPENSSL_free(e); 136 return 1; 137} 138 139int ENGINE_free(ENGINE *e) 140{ 141 return engine_free_util(e, 1); 142} 143 144/* Cleanup stuff */ 145 146/* 147 * ENGINE_cleanup() is coded such that anything that does work that will need 148 * cleanup can register a "cleanup" callback here. That way we don't get 149 * linker bloat by referring to all *possible* cleanups, but any linker bloat 150 * into code "X" will cause X's cleanup function to end up here. 151 */ 152static STACK_OF(ENGINE_CLEANUP_ITEM) *cleanup_stack = NULL; 153static int int_cleanup_check(int create) 154{ 155 if (cleanup_stack) 156 return 1; 157 if (!create) 158 return 0; 159 cleanup_stack = sk_ENGINE_CLEANUP_ITEM_new_null(); 160 return (cleanup_stack ? 1 : 0); 161} 162 163static ENGINE_CLEANUP_ITEM *int_cleanup_item(ENGINE_CLEANUP_CB *cb) 164{ 165 ENGINE_CLEANUP_ITEM *item = OPENSSL_malloc(sizeof(ENGINE_CLEANUP_ITEM)); 166 if (!item) 167 return NULL; 168 item->cb = cb; 169 return item; 170} 171 172void engine_cleanup_add_first(ENGINE_CLEANUP_CB *cb) 173{ 174 ENGINE_CLEANUP_ITEM *item; 175 if (!int_cleanup_check(1)) 176 return; 177 item = int_cleanup_item(cb); 178 if (item) 179 sk_ENGINE_CLEANUP_ITEM_insert(cleanup_stack, item, 0); 180} 181 182void engine_cleanup_add_last(ENGINE_CLEANUP_CB *cb) 183{ 184 ENGINE_CLEANUP_ITEM *item; 185 if (!int_cleanup_check(1)) 186 return; 187 item = int_cleanup_item(cb); 188 if (item) 189 sk_ENGINE_CLEANUP_ITEM_push(cleanup_stack, item); 190} 191 192/* The API function that performs all cleanup */ 193static void engine_cleanup_cb_free(ENGINE_CLEANUP_ITEM *item) 194{ 195 (*(item->cb)) (); 196 OPENSSL_free(item); 197} 198 199void ENGINE_cleanup(void) 200{ 201 if (int_cleanup_check(0)) { 202 sk_ENGINE_CLEANUP_ITEM_pop_free(cleanup_stack, 203 engine_cleanup_cb_free); 204 cleanup_stack = NULL; 205 } 206 /* 207 * FIXME: This should be handled (somehow) through RAND, eg. by it 208 * registering a cleanup callback. 209 */ 210 RAND_set_rand_method(NULL); 211} 212 213/* Now the "ex_data" support */ 214 215int ENGINE_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 216 CRYPTO_EX_dup *dup_func, 217 CRYPTO_EX_free *free_func) 218{ 219 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ENGINE, argl, argp, 220 new_func, dup_func, free_func); 221} 222 223int ENGINE_set_ex_data(ENGINE *e, int idx, void *arg) 224{ 225 return (CRYPTO_set_ex_data(&e->ex_data, idx, arg)); 226} 227 228void *ENGINE_get_ex_data(const ENGINE *e, int idx) 229{ 230 return (CRYPTO_get_ex_data(&e->ex_data, idx)); 231} 232 233/* 234 * Functions to get/set an ENGINE's elements - mainly to avoid exposing the 235 * ENGINE structure itself. 236 */ 237 238int ENGINE_set_id(ENGINE *e, const char *id) 239{ 240 if (id == NULL) { 241 ENGINEerr(ENGINE_F_ENGINE_SET_ID, ERR_R_PASSED_NULL_PARAMETER); 242 return 0; 243 } 244 e->id = id; 245 return 1; 246} 247 248int ENGINE_set_name(ENGINE *e, const char *name) 249{ 250 if (name == NULL) { 251 ENGINEerr(ENGINE_F_ENGINE_SET_NAME, ERR_R_PASSED_NULL_PARAMETER); 252 return 0; 253 } 254 e->name = name; 255 return 1; 256} 257 258int ENGINE_set_destroy_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR destroy_f) 259{ 260 e->destroy = destroy_f; 261 return 1; 262} 263 264int ENGINE_set_init_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR init_f) 265{ 266 e->init = init_f; 267 return 1; 268} 269 270int ENGINE_set_finish_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR finish_f) 271{ 272 e->finish = finish_f; 273 return 1; 274} 275 276int ENGINE_set_ctrl_function(ENGINE *e, ENGINE_CTRL_FUNC_PTR ctrl_f) 277{ 278 e->ctrl = ctrl_f; 279 return 1; 280} 281 282int ENGINE_set_flags(ENGINE *e, int flags) 283{ 284 e->flags = flags; 285 return 1; 286} 287 288int ENGINE_set_cmd_defns(ENGINE *e, const ENGINE_CMD_DEFN *defns) 289{ 290 e->cmd_defns = defns; 291 return 1; 292} 293 294const char *ENGINE_get_id(const ENGINE *e) 295{ 296 return e->id; 297} 298 299const char *ENGINE_get_name(const ENGINE *e) 300{ 301 return e->name; 302} 303 304ENGINE_GEN_INT_FUNC_PTR ENGINE_get_destroy_function(const ENGINE *e) 305{ 306 return e->destroy; 307} 308 309ENGINE_GEN_INT_FUNC_PTR ENGINE_get_init_function(const ENGINE *e) 310{ 311 return e->init; 312} 313 314ENGINE_GEN_INT_FUNC_PTR ENGINE_get_finish_function(const ENGINE *e) 315{ 316 return e->finish; 317} 318 319ENGINE_CTRL_FUNC_PTR ENGINE_get_ctrl_function(const ENGINE *e) 320{ 321 return e->ctrl; 322} 323 324int ENGINE_get_flags(const ENGINE *e) 325{ 326 return e->flags; 327} 328 329const ENGINE_CMD_DEFN *ENGINE_get_cmd_defns(const ENGINE *e) 330{ 331 return e->cmd_defns; 332} 333 334/* 335 * eng_lib.o is pretty much linked into anything that touches ENGINE already, 336 * so put the "static_state" hack here. 337 */ 338 339static int internal_static_hack = 0; 340 341void *ENGINE_get_static_state(void) 342{ 343 return &internal_static_hack; 344} 345