153 lines
4.8 KiB
C
153 lines
4.8 KiB
C
/* crypto/rand/rand_lib.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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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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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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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 the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include <time.h>
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#include "cryptlib.h"
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#include "rand_lcl.h"
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#include <openssl/rand.h>
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#ifdef OPENSSL_FIPS
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#include <openssl/fips.h>
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#include <openssl/fips_rand.h>
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#endif
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#ifndef OPENSSL_NO_ENGINE
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#include <openssl/engine.h>
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#endif
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#if defined(OPENSSL_FIPS) && !defined(OPENSSL_NO_ENGINE)
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/* non-NULL if default_RAND_meth is ENGINE-provided */
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static ENGINE *funct_ref =NULL;
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int eng_RAND_set_rand_method(const RAND_METHOD *meth, const RAND_METHOD **pmeth)
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{
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if(funct_ref)
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{
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ENGINE_finish(funct_ref);
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funct_ref = NULL;
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}
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*pmeth = meth;
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return 1;
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}
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const RAND_METHOD *eng_RAND_get_rand_method(const RAND_METHOD **pmeth)
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{
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if (!*pmeth)
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{
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ENGINE *e = ENGINE_get_default_RAND();
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if(e)
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{
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*pmeth = ENGINE_get_RAND(e);
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if(!*pmeth)
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{
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ENGINE_finish(e);
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e = NULL;
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}
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}
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if(e)
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funct_ref = e;
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else
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if(FIPS_mode())
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*pmeth=FIPS_rand_method();
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else
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*pmeth = RAND_SSLeay();
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}
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if(FIPS_mode()
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&& *pmeth != FIPS_rand_check())
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{
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RANDerr(RAND_F_ENG_RAND_GET_RAND_METHOD,RAND_R_NON_FIPS_METHOD);
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return 0;
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}
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return *pmeth;
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}
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int RAND_set_rand_engine(ENGINE *engine)
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{
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const RAND_METHOD *tmp_meth = NULL;
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if(engine)
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{
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if(!ENGINE_init(engine))
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return 0;
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tmp_meth = ENGINE_get_RAND(engine);
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if(!tmp_meth)
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{
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ENGINE_finish(engine);
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return 0;
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}
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}
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/* This function releases any prior ENGINE so call it first */
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RAND_set_rand_method(tmp_meth);
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funct_ref = engine;
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return 1;
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}
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void int_RAND_init_engine_callbacks(void)
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{
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static int done = 0;
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if (done)
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return;
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int_RAND_set_callbacks(eng_RAND_set_rand_method,
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eng_RAND_get_rand_method);
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done = 1;
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}
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#endif
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