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/* ====================================================================
* Copyright (c) 2000 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"
/* If this symbol is defined then ENGINE_get_cipher_engine(), the function that
* is used by EVP to hook in cipher code and cache defaults (etc), will display
* brief debugging summaries to stderr with the 'nid'. */
/* #define ENGINE_CIPHER_DEBUG */
static ENGINE_TABLE *cipher_table = NULL;
void ENGINE_unregister_ciphers(ENGINE *e)
{
engine_table_unregister(&cipher_table, e);
}
static void engine_unregister_all_ciphers(void)
{
engine_table_cleanup(&cipher_table);
}
int ENGINE_register_ciphers(ENGINE *e)
{
if(e->ciphers)
{
const int *nids;
int num_nids = e->ciphers(e, NULL, &nids, 0);
if(num_nids > 0)
return engine_table_register(&cipher_table,
engine_unregister_all_ciphers, e, nids,
num_nids, 0);
}
return 1;
}
void ENGINE_register_all_ciphers()
{
ENGINE *e;
for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e))
ENGINE_register_ciphers(e);
}
int ENGINE_set_default_ciphers(ENGINE *e)
{
if(e->ciphers)
{
const int *nids;
int num_nids = e->ciphers(e, NULL, &nids, 0);
if(num_nids > 0)
return engine_table_register(&cipher_table,
engine_unregister_all_ciphers, e, nids,
num_nids, 1);
}
return 1;
}
/* Exposed API function to get a functional reference from the implementation
* table (ie. try to get a functional reference from the tabled structural
* references) for a given cipher 'nid' */
ENGINE *ENGINE_get_cipher_engine(int nid)
{
return engine_table_select(&cipher_table, nid);
}
/* Obtains a cipher implementation from an ENGINE functional reference */
const EVP_CIPHER *ENGINE_get_cipher(ENGINE *e, int nid)
{
const EVP_CIPHER *ret;
ENGINE_CIPHERS_PTR fn = ENGINE_get_ciphers(e);
if(!fn || !fn(e, &ret, NULL, nid))
{
ENGINEerr(ENGINE_F_ENGINE_GET_CIPHER,
ENGINE_R_UNIMPLEMENTED_CIPHER);
return NULL;
}
return ret;
}
/* Gets the cipher callback from an ENGINE structure */
ENGINE_CIPHERS_PTR ENGINE_get_ciphers(const ENGINE *e)
{
return e->ciphers;
}
/* Sets the cipher callback in an ENGINE structure */
int ENGINE_set_ciphers(ENGINE *e, ENGINE_CIPHERS_PTR f)
{
e->ciphers = f;
return 1;
}