diff options
Diffstat (limited to 'openssl/crypto/engine/eng_list.c')
| -rw-r--r-- | openssl/crypto/engine/eng_list.c | 431 |
1 files changed, 431 insertions, 0 deletions
diff --git a/openssl/crypto/engine/eng_list.c b/openssl/crypto/engine/eng_list.c new file mode 100644 index 000000000..bd511944b --- /dev/null +++ b/openssl/crypto/engine/eng_list.c @@ -0,0 +1,431 @@ +/* crypto/engine/eng_list.c */ +/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL + * project 2000. + */ +/* ==================================================================== + * Copyright (c) 1999-2001 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * licensing@OpenSSL.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ +/* ==================================================================== + * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. + * ECDH support in OpenSSL originally developed by + * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. + */ + +#include "eng_int.h" + +/* The linked-list of pointers to engine types. engine_list_head + * incorporates an implicit structural reference but engine_list_tail + * does not - the latter is a computational niceity and only points + * to something that is already pointed to by its predecessor in the + * list (or engine_list_head itself). In the same way, the use of the + * "prev" pointer in each ENGINE is to save excessive list iteration, + * it doesn't correspond to an extra structural reference. Hence, + * engine_list_head, and each non-null "next" pointer account for + * the list itself assuming exactly 1 structural reference on each + * list member. */ +static ENGINE *engine_list_head = NULL; +static ENGINE *engine_list_tail = NULL; + +/* This cleanup function is only needed internally. If it should be called, we + * register it with the "ENGINE_cleanup()" stack to be called during cleanup. */ + +static void engine_list_cleanup(void) + { + ENGINE *iterator = engine_list_head; + + while(iterator != NULL) + { + ENGINE_remove(iterator); + iterator = engine_list_head; + } + return; + } + +/* These static functions starting with a lower case "engine_" always + * take place when CRYPTO_LOCK_ENGINE has been locked up. */ +static int engine_list_add(ENGINE *e) + { + int conflict = 0; + ENGINE *iterator = NULL; + + if(e == NULL) + { + ENGINEerr(ENGINE_F_ENGINE_LIST_ADD, + ERR_R_PASSED_NULL_PARAMETER); + return 0; + } + iterator = engine_list_head; + while(iterator && !conflict) + { + conflict = (strcmp(iterator->id, e->id) == 0); + iterator = iterator->next; + } + if(conflict) + { + ENGINEerr(ENGINE_F_ENGINE_LIST_ADD, + ENGINE_R_CONFLICTING_ENGINE_ID); + return 0; + } + if(engine_list_head == NULL) + { + /* We are adding to an empty list. */ + if(engine_list_tail) + { + ENGINEerr(ENGINE_F_ENGINE_LIST_ADD, + ENGINE_R_INTERNAL_LIST_ERROR); + return 0; + } + engine_list_head = e; + e->prev = NULL; + /* The first time the list allocates, we should register the + * cleanup. */ + engine_cleanup_add_last(engine_list_cleanup); + } + else + { + /* We are adding to the tail of an existing list. */ + if((engine_list_tail == NULL) || + (engine_list_tail->next != NULL)) + { + ENGINEerr(ENGINE_F_ENGINE_LIST_ADD, + ENGINE_R_INTERNAL_LIST_ERROR); + return 0; + } + engine_list_tail->next = e; + e->prev = engine_list_tail; + } + /* Having the engine in the list assumes a structural + * reference. */ + e->struct_ref++; + engine_ref_debug(e, 0, 1) + /* However it came to be, e is the last item in the list. */ + engine_list_tail = e; + e->next = NULL; + return 1; + } + +static int engine_list_remove(ENGINE *e) + { + ENGINE *iterator; + + if(e == NULL) + { + ENGINEerr(ENGINE_F_ENGINE_LIST_REMOVE, + ERR_R_PASSED_NULL_PARAMETER); + return 0; + } + /* We need to check that e is in our linked list! */ + iterator = engine_list_head; + while(iterator && (iterator != e)) + iterator = iterator->next; + if(iterator == NULL) + { + ENGINEerr(ENGINE_F_ENGINE_LIST_REMOVE, + ENGINE_R_ENGINE_IS_NOT_IN_LIST); + return 0; + } + /* un-link e from the chain. */ + if(e->next) + e->next->prev = e->prev; + if(e->prev) + e->prev->next = e->next; + /* Correct our head/tail if necessary. */ + if(engine_list_head == e) + engine_list_head = e->next; + if(engine_list_tail == e) + engine_list_tail = e->prev; + engine_free_util(e, 0); + return 1; + } + +/* Get the first/last "ENGINE" type available. */ +ENGINE *ENGINE_get_first(void) + { + ENGINE *ret; + + CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); + ret = engine_list_head; + if(ret) + { + ret->struct_ref++; + engine_ref_debug(ret, 0, 1) + } + CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); + return ret; + } + +ENGINE *ENGINE_get_last(void) + { + ENGINE *ret; + + CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); + ret = engine_list_tail; + if(ret) + { + ret->struct_ref++; + engine_ref_debug(ret, 0, 1) + } + CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); + return ret; + } + +/* Iterate to the next/previous "ENGINE" type (NULL = end of the list). */ +ENGINE *ENGINE_get_next(ENGINE *e) + { + ENGINE *ret = NULL; + if(e == NULL) + { + ENGINEerr(ENGINE_F_ENGINE_GET_NEXT, + ERR_R_PASSED_NULL_PARAMETER); + return 0; + } + CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); + ret = e->next; + if(ret) + { + /* Return a valid structural refernce to the next ENGINE */ + ret->struct_ref++; + engine_ref_debug(ret, 0, 1) + } + CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); + /* Release the structural reference to the previous ENGINE */ + ENGINE_free(e); + return ret; + } + +ENGINE *ENGINE_get_prev(ENGINE *e) + { + ENGINE *ret = NULL; + if(e == NULL) + { + ENGINEerr(ENGINE_F_ENGINE_GET_PREV, + ERR_R_PASSED_NULL_PARAMETER); + return 0; + } + CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); + ret = e->prev; + if(ret) + { + /* Return a valid structural reference to the next ENGINE */ + ret->struct_ref++; + engine_ref_debug(ret, 0, 1) + } + CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); + /* Release the structural reference to the previous ENGINE */ + ENGINE_free(e); + return ret; + } + +/* Add another "ENGINE" type into the list. */ +int ENGINE_add(ENGINE *e) + { + int to_return = 1; + if(e == NULL) + { + ENGINEerr(ENGINE_F_ENGINE_ADD, + ERR_R_PASSED_NULL_PARAMETER); + return 0; + } + if((e->id == NULL) || (e->name == NULL)) + { + ENGINEerr(ENGINE_F_ENGINE_ADD, + ENGINE_R_ID_OR_NAME_MISSING); + } + CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); + if(!engine_list_add(e)) + { + ENGINEerr(ENGINE_F_ENGINE_ADD, + ENGINE_R_INTERNAL_LIST_ERROR); + to_return = 0; + } + CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); + return to_return; + } + +/* Remove an existing "ENGINE" type from the array. */ +int ENGINE_remove(ENGINE *e) + { + int to_return = 1; + if(e == NULL) + { + ENGINEerr(ENGINE_F_ENGINE_REMOVE, + ERR_R_PASSED_NULL_PARAMETER); + return 0; + } + CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); + if(!engine_list_remove(e)) + { + ENGINEerr(ENGINE_F_ENGINE_REMOVE, + ENGINE_R_INTERNAL_LIST_ERROR); + to_return = 0; + } + CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); + return to_return; + } + +static void engine_cpy(ENGINE *dest, const ENGINE *src) + { + dest->id = src->id; + dest->name = src->name; +#ifndef OPENSSL_NO_RSA + dest->rsa_meth = src->rsa_meth; +#endif +#ifndef OPENSSL_NO_DSA + dest->dsa_meth = src->dsa_meth; +#endif +#ifndef OPENSSL_NO_DH + dest->dh_meth = src->dh_meth; +#endif +#ifndef OPENSSL_NO_ECDH + dest->ecdh_meth = src->ecdh_meth; +#endif +#ifndef OPENSSL_NO_ECDSA + dest->ecdsa_meth = src->ecdsa_meth; +#endif + dest->rand_meth = src->rand_meth; + dest->store_meth = src->store_meth; + dest->ciphers = src->ciphers; + dest->digests = src->digests; + dest->destroy = src->destroy; + dest->init = src->init; + dest->finish = src->finish; + dest->ctrl = src->ctrl; + dest->load_privkey = src->load_privkey; + dest->load_pubkey = src->load_pubkey; + dest->cmd_defns = src->cmd_defns; + dest->flags = src->flags; + } + +ENGINE *ENGINE_by_id(const char *id) + { + ENGINE *iterator; + char *load_dir = NULL; + if(id == NULL) + { + ENGINEerr(ENGINE_F_ENGINE_BY_ID, + ERR_R_PASSED_NULL_PARAMETER); + return NULL; + } + CRYPTO_w_lock(CRYPTO_LOCK_ENGINE); + iterator = engine_list_head; + while(iterator && (strcmp(id, iterator->id) != 0)) + iterator = iterator->next; + if(iterator) + { + /* We need to return a structural reference. If this is an + * ENGINE type that returns copies, make a duplicate - otherwise + * increment the existing ENGINE's reference count. */ + if(iterator->flags & ENGINE_FLAGS_BY_ID_COPY) + { + ENGINE *cp = ENGINE_new(); + if(!cp) + iterator = NULL; + else + { + engine_cpy(cp, iterator); + iterator = cp; + } + } + else + { + iterator->struct_ref++; + engine_ref_debug(iterator, 0, 1) + } + } + CRYPTO_w_unlock(CRYPTO_LOCK_ENGINE); +#if 0 + if(iterator == NULL) + { + ENGINEerr(ENGINE_F_ENGINE_BY_ID, + ENGINE_R_NO_SUCH_ENGINE); + ERR_add_error_data(2, "id=", id); + } + return iterator; +#else + /* EEK! Experimental code starts */ + if(iterator) return iterator; + /* Prevent infinite recusrion if we're looking for the dynamic engine. */ + if (strcmp(id, "dynamic")) + { +#ifdef OPENSSL_SYS_VMS + if((load_dir = getenv("OPENSSL_ENGINES")) == 0) load_dir = "SSLROOT:[ENGINES]"; +#else + if((load_dir = getenv("OPENSSL_ENGINES")) == 0) load_dir = ENGINESDIR; +#endif + iterator = ENGINE_by_id("dynamic"); + if(!iterator || !ENGINE_ctrl_cmd_string(iterator, "ID", id, 0) || + !ENGINE_ctrl_cmd_string(iterator, "DIR_LOAD", "2", 0) || + !ENGINE_ctrl_cmd_string(iterator, "DIR_ADD", + load_dir, 0) || + !ENGINE_ctrl_cmd_string(iterator, "LOAD", NULL, 0)) + goto notfound; + return iterator; + } +notfound: + ENGINEerr(ENGINE_F_ENGINE_BY_ID,ENGINE_R_NO_SUCH_ENGINE); + ERR_add_error_data(2, "id=", id); + return NULL; + /* EEK! Experimental code ends */ +#endif + } + +int ENGINE_up_ref(ENGINE *e) + { + if (e == NULL) + { + ENGINEerr(ENGINE_F_ENGINE_UP_REF,ERR_R_PASSED_NULL_PARAMETER); + return 0; + } + CRYPTO_add(&e->struct_ref,1,CRYPTO_LOCK_ENGINE); + return 1; + } |