1656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* crypto/engine/eng_init.c */ 2656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* ==================================================================== 3656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Copyright (c) 1999-2001 The OpenSSL Project. All rights reserved. 4656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 5656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Redistribution and use in source and binary forms, with or without 6656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * modification, are permitted provided that the following conditions 7656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * are met: 8656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 9656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 1. Redistributions of source code must retain the above copyright 10656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * notice, this list of conditions and the following disclaimer. 11656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 12656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 13656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * notice, this list of conditions and the following disclaimer in 14656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the documentation and/or other materials provided with the 15656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * distribution. 16656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 17656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 3. All advertising materials mentioning features or use of this 18656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * software must display the following acknowledgment: 19656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * "This product includes software developed by the OpenSSL Project 20656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 21656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 22656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 23656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * endorse or promote products derived from this software without 24656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * prior written permission. For written permission, please contact 25656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * licensing@OpenSSL.org. 26656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 27656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 5. Products derived from this software may not be called "OpenSSL" 28656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * nor may "OpenSSL" appear in their names without prior written 29656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * permission of the OpenSSL Project. 30656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 31656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 6. Redistributions of any form whatsoever must retain the following 32656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * acknowledgment: 33656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * "This product includes software developed by the OpenSSL Project 34656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 35656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 36656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 37656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 38656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 39656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 40656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 41656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 42656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 43656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 44656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 45656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 46656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 47656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * OF THE POSSIBILITY OF SUCH DAMAGE. 48656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ==================================================================== 49656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 50656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This product includes cryptographic software written by Eric Young 51656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * (eay@cryptsoft.com). This product includes software written by Tim 52656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Hudson (tjh@cryptsoft.com). 53656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 54656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 55656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 56656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include "eng_int.h" 57656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 58656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* Initialise a engine type for use (or up its functional reference count 59656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * if it's already in use). This version is only used internally. */ 60656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint engine_unlocked_init(ENGINE *e) 61656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 62656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int to_return = 1; 63656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 64656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if((e->funct_ref == 0) && e->init) 65656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* This is the first functional reference and the engine 66656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * requires initialisation so we do it now. */ 67656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project to_return = e->init(e); 68656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(to_return) 69656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 70656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* OK, we return a functional reference which is also a 71656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * structural reference. */ 72656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project e->struct_ref++; 73656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project e->funct_ref++; 74656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project engine_ref_debug(e, 0, 1) 75656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project engine_ref_debug(e, 1, 1) 76656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 77656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return to_return; 78656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 79656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 80656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* Free a functional reference to a engine type. This version is only used 81656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * internally. */ 82656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint engine_unlocked_finish(ENGINE *e, int unlock_for_handlers) 83656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 84656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int to_return = 1; 85656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 86656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Reduce the functional reference count here so if it's the terminating 87656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * case, we can release the lock safely and call the finish() handler 88656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * without risk of a race. We get a race if we leave the count until 89656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * after and something else is calling "finish" at the same time - 90656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * there's a chance that both threads will together take the count from 91656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 2 to 0 without either calling finish(). */ 92656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project e->funct_ref--; 93656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project engine_ref_debug(e, 1, -1); 94656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if((e->funct_ref == 0) && e->finish) 95656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 96656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(unlock_for_handlers) 97656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); 98656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project to_return = e->finish(e); 99656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(unlock_for_handlers) 100656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); 101656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(!to_return) 102656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 103656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 104656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#ifdef REF_CHECK 105656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(e->funct_ref < 0) 106656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 107656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project fprintf(stderr,"ENGINE_finish, bad functional reference count\n"); 108656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project abort(); 109656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 110656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 111656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Release the structural reference too */ 112656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(!engine_free_util(e, 0)) 113656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 114656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ENGINEerr(ENGINE_F_ENGINE_UNLOCKED_FINISH,ENGINE_R_FINISH_FAILED); 115656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 116656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 117656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return to_return; 118656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 119656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 120656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* The API (locked) version of "init" */ 121656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint ENGINE_init(ENGINE *e) 122656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 123656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int ret; 124656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(e == NULL) 125656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 126656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ENGINEerr(ENGINE_F_ENGINE_INIT,ERR_R_PASSED_NULL_PARAMETER); 127656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 128656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 129656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); 130656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ret = engine_unlocked_init(e); 131656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); 132656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return ret; 133656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 134656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 135656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* The API (locked) version of "finish" */ 136656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint ENGINE_finish(ENGINE *e) 137656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 138656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int to_return = 1; 139656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 140656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(e == NULL) 141656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 142656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ENGINEerr(ENGINE_F_ENGINE_FINISH,ERR_R_PASSED_NULL_PARAMETER); 143656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 144656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 145656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); 146656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project to_return = engine_unlocked_finish(e, 1); 147656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); 148656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(!to_return) 149656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 150656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ENGINEerr(ENGINE_F_ENGINE_FINISH,ENGINE_R_FINISH_FAILED); 151656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 152656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 153656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return to_return; 154656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 155