124 lines
4.3 KiB
C
124 lines
4.3 KiB
C
/* ====================================================================
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* Copyright (c) 2000 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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/*
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* If this symbol is defined then ENGINE_get_default_RAND(), the function
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* that is used by RAND to hook in implementation code and cache defaults
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* (etc), will display brief debugging summaries to stderr with the 'nid'.
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*/
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/* #define ENGINE_RAND_DEBUG */
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static ENGINE_TABLE *rand_table = NULL;
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static const int dummy_nid = 1;
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void ENGINE_unregister_RAND(ENGINE *e)
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{
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engine_table_unregister(&rand_table, e);
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}
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static void engine_unregister_all_RAND(void)
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{
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engine_table_cleanup(&rand_table);
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}
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int ENGINE_register_RAND(ENGINE *e)
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{
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if (e->rand_meth)
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return engine_table_register(&rand_table,
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engine_unregister_all_RAND, e,
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&dummy_nid, 1, 0);
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return 1;
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}
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void ENGINE_register_all_RAND()
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{
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ENGINE *e;
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for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
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ENGINE_register_RAND(e);
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}
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int ENGINE_set_default_RAND(ENGINE *e)
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{
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if (e->rand_meth)
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return engine_table_register(&rand_table,
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engine_unregister_all_RAND, e,
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&dummy_nid, 1, 1);
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return 1;
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}
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/*
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* Exposed API function to get a functional reference from the implementation
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* table (ie. try to get a functional reference from the tabled structural
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* references).
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*/
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ENGINE *ENGINE_get_default_RAND(void)
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{
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return engine_table_select(&rand_table, dummy_nid);
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}
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/* Obtains an RAND implementation from an ENGINE functional reference */
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const RAND_METHOD *ENGINE_get_RAND(const ENGINE *e)
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{
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return e->rand_meth;
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}
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/* Sets an RAND implementation in an ENGINE structure */
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int ENGINE_set_RAND(ENGINE *e, const RAND_METHOD *rand_meth)
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{
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e->rand_meth = rand_meth;
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return 1;
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}
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