ref: bae3ac29fc39bc36329abf1823004c0d79b2f6f0
dir: /sys/src/ape/lib/openssl/crypto/engine/eng_lib.c/
/* crypto/engine/eng_lib.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).
*
*/
#include "eng_int.h"
#include <openssl/rand.h>
/* The "new"/"free" stuff first */
ENGINE *ENGINE_new(void)
{
ENGINE *ret;
ret = (ENGINE *)OPENSSL_malloc(sizeof(ENGINE));
if(ret == NULL)
{
ENGINEerr(ENGINE_F_ENGINE_NEW, ERR_R_MALLOC_FAILURE);
return NULL;
}
memset(ret, 0, sizeof(ENGINE));
ret->struct_ref = 1;
engine_ref_debug(ret, 0, 1)
CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ENGINE, ret, &ret->ex_data);
return ret;
}
/* Placed here (close proximity to ENGINE_new) so that modifications to the
* elements of the ENGINE structure are more likely to be caught and changed
* here. */
void engine_set_all_null(ENGINE *e)
{
e->id = NULL;
e->name = NULL;
e->rsa_meth = NULL;
e->dsa_meth = NULL;
e->dh_meth = NULL;
e->rand_meth = NULL;
e->store_meth = NULL;
e->ciphers = NULL;
e->digests = NULL;
e->destroy = NULL;
e->init = NULL;
e->finish = NULL;
e->ctrl = NULL;
e->load_privkey = NULL;
e->load_pubkey = NULL;
e->cmd_defns = NULL;
e->flags = 0;
}
int engine_free_util(ENGINE *e, int locked)
{
int i;
if(e == NULL)
{
ENGINEerr(ENGINE_F_ENGINE_FREE_UTIL,
ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
if(locked)
i = CRYPTO_add(&e->struct_ref,-1,CRYPTO_LOCK_ENGINE);
else
i = --e->struct_ref;
engine_ref_debug(e, 0, -1)
if (i > 0) return 1;
#ifdef REF_CHECK
if (i < 0)
{
fprintf(stderr,"ENGINE_free, bad structural reference count\n");
abort();
}
#endif
/* Give the ENGINE a chance to do any structural cleanup corresponding
* to allocation it did in its constructor (eg. unload error strings) */
if(e->destroy)
e->destroy(e);
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ENGINE, e, &e->ex_data);
OPENSSL_free(e);
return 1;
}
int ENGINE_free(ENGINE *e)
{
return engine_free_util(e, 1);
}
/* Cleanup stuff */
/* ENGINE_cleanup() is coded such that anything that does work that will need
* cleanup can register a "cleanup" callback here. That way we don't get linker
* bloat by referring to all *possible* cleanups, but any linker bloat into code
* "X" will cause X's cleanup function to end up here. */
static STACK_OF(ENGINE_CLEANUP_ITEM) *cleanup_stack = NULL;
static int int_cleanup_check(int create)
{
if(cleanup_stack) return 1;
if(!create) return 0;
cleanup_stack = sk_ENGINE_CLEANUP_ITEM_new_null();
return (cleanup_stack ? 1 : 0);
}
static ENGINE_CLEANUP_ITEM *int_cleanup_item(ENGINE_CLEANUP_CB *cb)
{
ENGINE_CLEANUP_ITEM *item = OPENSSL_malloc(sizeof(
ENGINE_CLEANUP_ITEM));
if(!item) return NULL;
item->cb = cb;
return item;
}
void engine_cleanup_add_first(ENGINE_CLEANUP_CB *cb)
{
ENGINE_CLEANUP_ITEM *item;
if(!int_cleanup_check(1)) return;
item = int_cleanup_item(cb);
if(item)
sk_ENGINE_CLEANUP_ITEM_insert(cleanup_stack, item, 0);
}
void engine_cleanup_add_last(ENGINE_CLEANUP_CB *cb)
{
ENGINE_CLEANUP_ITEM *item;
if(!int_cleanup_check(1)) return;
item = int_cleanup_item(cb);
if(item)
sk_ENGINE_CLEANUP_ITEM_push(cleanup_stack, item);
}
/* The API function that performs all cleanup */
static void engine_cleanup_cb_free(ENGINE_CLEANUP_ITEM *item)
{
(*(item->cb))();
OPENSSL_free(item);
}
void ENGINE_cleanup(void)
{
if(int_cleanup_check(0))
{
sk_ENGINE_CLEANUP_ITEM_pop_free(cleanup_stack,
engine_cleanup_cb_free);
cleanup_stack = NULL;
}
/* FIXME: This should be handled (somehow) through RAND, eg. by it
* registering a cleanup callback. */
RAND_set_rand_method(NULL);
}
/* Now the "ex_data" support */
int ENGINE_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
{
return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ENGINE, argl, argp,
new_func, dup_func, free_func);
}
int ENGINE_set_ex_data(ENGINE *e, int idx, void *arg)
{
return(CRYPTO_set_ex_data(&e->ex_data, idx, arg));
}
void *ENGINE_get_ex_data(const ENGINE *e, int idx)
{
return(CRYPTO_get_ex_data(&e->ex_data, idx));
}
/* Functions to get/set an ENGINE's elements - mainly to avoid exposing the
* ENGINE structure itself. */
int ENGINE_set_id(ENGINE *e, const char *id)
{
if(id == NULL)
{
ENGINEerr(ENGINE_F_ENGINE_SET_ID,
ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
e->id = id;
return 1;
}
int ENGINE_set_name(ENGINE *e, const char *name)
{
if(name == NULL)
{
ENGINEerr(ENGINE_F_ENGINE_SET_NAME,
ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
e->name = name;
return 1;
}
int ENGINE_set_destroy_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR destroy_f)
{
e->destroy = destroy_f;
return 1;
}
int ENGINE_set_init_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR init_f)
{
e->init = init_f;
return 1;
}
int ENGINE_set_finish_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR finish_f)
{
e->finish = finish_f;
return 1;
}
int ENGINE_set_ctrl_function(ENGINE *e, ENGINE_CTRL_FUNC_PTR ctrl_f)
{
e->ctrl = ctrl_f;
return 1;
}
int ENGINE_set_flags(ENGINE *e, int flags)
{
e->flags = flags;
return 1;
}
int ENGINE_set_cmd_defns(ENGINE *e, const ENGINE_CMD_DEFN *defns)
{
e->cmd_defns = defns;
return 1;
}
const char *ENGINE_get_id(const ENGINE *e)
{
return e->id;
}
const char *ENGINE_get_name(const ENGINE *e)
{
return e->name;
}
ENGINE_GEN_INT_FUNC_PTR ENGINE_get_destroy_function(const ENGINE *e)
{
return e->destroy;
}
ENGINE_GEN_INT_FUNC_PTR ENGINE_get_init_function(const ENGINE *e)
{
return e->init;
}
ENGINE_GEN_INT_FUNC_PTR ENGINE_get_finish_function(const ENGINE *e)
{
return e->finish;
}
ENGINE_CTRL_FUNC_PTR ENGINE_get_ctrl_function(const ENGINE *e)
{
return e->ctrl;
}
int ENGINE_get_flags(const ENGINE *e)
{
return e->flags;
}
const ENGINE_CMD_DEFN *ENGINE_get_cmd_defns(const ENGINE *e)
{
return e->cmd_defns;
}
/* eng_lib.o is pretty much linked into anything that touches ENGINE already, so
* put the "static_state" hack here. */
static int internal_static_hack = 0;
void *ENGINE_get_static_state(void)
{
return &internal_static_hack;
}