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347 lines
9.1 KiB
347 lines
9.1 KiB
/* crypto/engine/eng_lib.c */ |
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/* |
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* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project |
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* 2000. |
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*/ |
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/* ==================================================================== |
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* Copyright (c) 1999-2001 The OpenSSL Project. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. All advertising materials mentioning features or use of this |
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* software must display the following acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
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* |
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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* endorse or promote products derived from this software without |
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* prior written permission. For written permission, please contact |
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* licensing@OpenSSL.org. |
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* |
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* 5. Products derived from this software may not be called "OpenSSL" |
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* nor may "OpenSSL" appear in their names without prior written |
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* permission of the OpenSSL Project. |
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* |
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* 6. Redistributions of any form whatsoever must retain the following |
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* acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This product includes cryptographic software written by Eric Young |
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* (eay@cryptsoft.com). This product includes software written by Tim |
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* Hudson (tjh@cryptsoft.com). |
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* |
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*/ |
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#include "eng_int.h" |
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#include <openssl/rand.h> |
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/* The "new"/"free" stuff first */ |
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ENGINE *ENGINE_new(void) |
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{ |
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ENGINE *ret; |
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ret = (ENGINE *)OPENSSL_malloc(sizeof(ENGINE)); |
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if (ret == NULL) { |
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ENGINEerr(ENGINE_F_ENGINE_NEW, ERR_R_MALLOC_FAILURE); |
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return NULL; |
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} |
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memset(ret, 0, sizeof(ENGINE)); |
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ret->struct_ref = 1; |
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engine_ref_debug(ret, 0, 1) |
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CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ENGINE, ret, &ret->ex_data); |
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return ret; |
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} |
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/* |
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* Placed here (close proximity to ENGINE_new) so that modifications to the |
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* elements of the ENGINE structure are more likely to be caught and changed |
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* here. |
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*/ |
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void engine_set_all_null(ENGINE *e) |
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{ |
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e->id = NULL; |
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e->name = NULL; |
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e->rsa_meth = NULL; |
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e->dsa_meth = NULL; |
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e->dh_meth = NULL; |
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e->rand_meth = NULL; |
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e->store_meth = NULL; |
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e->ciphers = NULL; |
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e->digests = NULL; |
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e->destroy = NULL; |
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e->init = NULL; |
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e->finish = NULL; |
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e->ctrl = NULL; |
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e->load_privkey = NULL; |
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e->load_pubkey = NULL; |
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e->cmd_defns = NULL; |
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e->flags = 0; |
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} |
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int engine_free_util(ENGINE *e, int locked) |
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{ |
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int i; |
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if (e == NULL) { |
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ENGINEerr(ENGINE_F_ENGINE_FREE_UTIL, ERR_R_PASSED_NULL_PARAMETER); |
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return 0; |
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} |
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if (locked) |
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i = CRYPTO_add(&e->struct_ref, -1, CRYPTO_LOCK_ENGINE); |
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else |
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i = --e->struct_ref; |
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engine_ref_debug(e, 0, -1) |
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if (i > 0) |
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return 1; |
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#ifdef REF_CHECK |
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if (i < 0) { |
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fprintf(stderr, "ENGINE_free, bad structural reference count\n"); |
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abort(); |
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} |
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#endif |
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/* Free up any dynamically allocated public key methods */ |
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engine_pkey_meths_free(e); |
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engine_pkey_asn1_meths_free(e); |
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/* |
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* Give the ENGINE a chance to do any structural cleanup corresponding to |
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* allocation it did in its constructor (eg. unload error strings) |
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*/ |
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if (e->destroy) |
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e->destroy(e); |
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ENGINE, e, &e->ex_data); |
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OPENSSL_free(e); |
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return 1; |
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} |
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int ENGINE_free(ENGINE *e) |
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{ |
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return engine_free_util(e, 1); |
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} |
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/* Cleanup stuff */ |
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/* |
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* ENGINE_cleanup() is coded such that anything that does work that will need |
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* cleanup can register a "cleanup" callback here. That way we don't get |
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* linker bloat by referring to all *possible* cleanups, but any linker bloat |
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* into code "X" will cause X's cleanup function to end up here. |
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*/ |
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static STACK_OF(ENGINE_CLEANUP_ITEM) *cleanup_stack = NULL; |
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static int int_cleanup_check(int create) |
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{ |
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if (cleanup_stack) |
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return 1; |
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if (!create) |
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return 0; |
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cleanup_stack = sk_ENGINE_CLEANUP_ITEM_new_null(); |
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return (cleanup_stack ? 1 : 0); |
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} |
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static ENGINE_CLEANUP_ITEM *int_cleanup_item(ENGINE_CLEANUP_CB *cb) |
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{ |
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ENGINE_CLEANUP_ITEM *item = OPENSSL_malloc(sizeof(ENGINE_CLEANUP_ITEM)); |
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if (!item) |
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return NULL; |
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item->cb = cb; |
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return item; |
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} |
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void engine_cleanup_add_first(ENGINE_CLEANUP_CB *cb) |
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{ |
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ENGINE_CLEANUP_ITEM *item; |
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if (!int_cleanup_check(1)) |
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return; |
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item = int_cleanup_item(cb); |
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if (item) |
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sk_ENGINE_CLEANUP_ITEM_insert(cleanup_stack, item, 0); |
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} |
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void engine_cleanup_add_last(ENGINE_CLEANUP_CB *cb) |
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{ |
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ENGINE_CLEANUP_ITEM *item; |
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if (!int_cleanup_check(1)) |
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return; |
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item = int_cleanup_item(cb); |
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if (item) |
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sk_ENGINE_CLEANUP_ITEM_push(cleanup_stack, item); |
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} |
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/* The API function that performs all cleanup */ |
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static void engine_cleanup_cb_free(ENGINE_CLEANUP_ITEM *item) |
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{ |
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(*(item->cb)) (); |
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OPENSSL_free(item); |
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} |
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void ENGINE_cleanup(void) |
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{ |
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if (int_cleanup_check(0)) { |
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sk_ENGINE_CLEANUP_ITEM_pop_free(cleanup_stack, |
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engine_cleanup_cb_free); |
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cleanup_stack = NULL; |
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} |
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/* |
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* FIXME: This should be handled (somehow) through RAND, eg. by it |
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* registering a cleanup callback. |
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*/ |
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RAND_set_rand_method(NULL); |
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} |
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/* Now the "ex_data" support */ |
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int ENGINE_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, |
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CRYPTO_EX_dup *dup_func, |
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CRYPTO_EX_free *free_func) |
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{ |
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return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ENGINE, argl, argp, |
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new_func, dup_func, free_func); |
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} |
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int ENGINE_set_ex_data(ENGINE *e, int idx, void *arg) |
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{ |
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return (CRYPTO_set_ex_data(&e->ex_data, idx, arg)); |
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} |
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void *ENGINE_get_ex_data(const ENGINE *e, int idx) |
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{ |
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return (CRYPTO_get_ex_data(&e->ex_data, idx)); |
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} |
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/* |
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* Functions to get/set an ENGINE's elements - mainly to avoid exposing the |
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* ENGINE structure itself. |
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*/ |
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int ENGINE_set_id(ENGINE *e, const char *id) |
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{ |
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if (id == NULL) { |
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ENGINEerr(ENGINE_F_ENGINE_SET_ID, ERR_R_PASSED_NULL_PARAMETER); |
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return 0; |
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} |
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e->id = id; |
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return 1; |
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} |
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int ENGINE_set_name(ENGINE *e, const char *name) |
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{ |
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if (name == NULL) { |
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ENGINEerr(ENGINE_F_ENGINE_SET_NAME, ERR_R_PASSED_NULL_PARAMETER); |
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return 0; |
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} |
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e->name = name; |
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return 1; |
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} |
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int ENGINE_set_destroy_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR destroy_f) |
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{ |
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e->destroy = destroy_f; |
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return 1; |
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} |
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int ENGINE_set_init_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR init_f) |
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{ |
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e->init = init_f; |
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return 1; |
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} |
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int ENGINE_set_finish_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR finish_f) |
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{ |
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e->finish = finish_f; |
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return 1; |
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} |
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int ENGINE_set_ctrl_function(ENGINE *e, ENGINE_CTRL_FUNC_PTR ctrl_f) |
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{ |
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e->ctrl = ctrl_f; |
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return 1; |
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} |
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int ENGINE_set_flags(ENGINE *e, int flags) |
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{ |
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e->flags = flags; |
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return 1; |
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} |
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int ENGINE_set_cmd_defns(ENGINE *e, const ENGINE_CMD_DEFN *defns) |
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{ |
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e->cmd_defns = defns; |
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return 1; |
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} |
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const char *ENGINE_get_id(const ENGINE *e) |
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{ |
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return e->id; |
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} |
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const char *ENGINE_get_name(const ENGINE *e) |
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{ |
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return e->name; |
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} |
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ENGINE_GEN_INT_FUNC_PTR ENGINE_get_destroy_function(const ENGINE *e) |
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{ |
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return e->destroy; |
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} |
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ENGINE_GEN_INT_FUNC_PTR ENGINE_get_init_function(const ENGINE *e) |
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{ |
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return e->init; |
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} |
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ENGINE_GEN_INT_FUNC_PTR ENGINE_get_finish_function(const ENGINE *e) |
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{ |
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return e->finish; |
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} |
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ENGINE_CTRL_FUNC_PTR ENGINE_get_ctrl_function(const ENGINE *e) |
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{ |
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return e->ctrl; |
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} |
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int ENGINE_get_flags(const ENGINE *e) |
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{ |
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return e->flags; |
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} |
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const ENGINE_CMD_DEFN *ENGINE_get_cmd_defns(const ENGINE *e) |
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{ |
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return e->cmd_defns; |
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} |
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/* |
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* eng_lib.o is pretty much linked into anything that touches ENGINE already, |
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* so put the "static_state" hack here. |
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*/ |
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static int internal_static_hack = 0; |
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void *ENGINE_get_static_state(void) |
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{ |
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return &internal_static_hack; |
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}
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