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/*
* Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include "eng_local.h"
static ENGINE_TABLE *rand_table = NULL;
static const int dummy_nid = 1;
void ENGINE_unregister_RAND(ENGINE *e)
{
engine_table_unregister(&rand_table, e);
}
static void engine_unregister_all_RAND(void)
{
engine_table_cleanup(&rand_table);
}
int ENGINE_register_RAND(ENGINE *e)
{
if (e->rand_meth)
return engine_table_register(&rand_table,
engine_unregister_all_RAND, e,
&dummy_nid, 1, 0);
return 1;
}
void ENGINE_register_all_RAND(void)
{
ENGINE *e;
for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
ENGINE_register_RAND(e);
}
int ENGINE_set_default_RAND(ENGINE *e)
{
if (e->rand_meth)
return engine_table_register(&rand_table,
engine_unregister_all_RAND, e,
&dummy_nid, 1, 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).
*/
ENGINE *ENGINE_get_default_RAND(void)
{
return engine_table_select(&rand_table, dummy_nid);
}
/* Obtains an RAND implementation from an ENGINE functional reference */
const RAND_METHOD *ENGINE_get_RAND(const ENGINE *e)
{
return e->rand_meth;
}
/* Sets an RAND implementation in an ENGINE structure */
int ENGINE_set_RAND(ENGINE *e, const RAND_METHOD *rand_meth)
{
e->rand_meth = rand_meth;
return 1;
}
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