mirror of https://github.com/openssl/openssl
137 lines
4.6 KiB
C
137 lines
4.6 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 <openssl/rand.h>
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#include <openssl/engine.h>
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static ENGINE *rand_engine=NULL;
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#if 0
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void RAND_set_rand_method(RAND_METHOD *meth)
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{
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rand_meth=meth;
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}
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#else
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int RAND_set_rand_method(ENGINE *engine)
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{
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ENGINE *mtmp;
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mtmp = rand_engine;
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if (!ENGINE_init(engine))
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return 0;
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rand_engine = engine;
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/* SHOULD ERROR CHECK THIS!!! */
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ENGINE_finish(mtmp);
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return 1;
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}
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#endif
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RAND_METHOD *RAND_get_rand_method(void)
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{
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if (rand_engine == NULL
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&& (rand_engine = ENGINE_get_default_RAND()) == NULL)
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return NULL;
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return ENGINE_get_RAND(rand_engine);
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}
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void RAND_cleanup(void)
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{
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RAND_METHOD *meth = RAND_get_rand_method();
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if (meth && meth->cleanup)
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meth->cleanup();
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}
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void RAND_seed(const void *buf, int num)
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{
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RAND_METHOD *meth = RAND_get_rand_method();
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if (meth && meth->seed)
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meth->seed(buf,num);
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}
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void RAND_add(const void *buf, int num, double entropy)
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{
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RAND_METHOD *meth = RAND_get_rand_method();
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if (meth && meth->add)
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meth->add(buf,num,entropy);
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}
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int RAND_bytes(unsigned char *buf, int num)
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{
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RAND_METHOD *meth = RAND_get_rand_method();
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if (meth && meth->bytes)
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return meth->bytes(buf,num);
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return(-1);
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}
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int RAND_pseudo_bytes(unsigned char *buf, int num)
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{
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RAND_METHOD *meth = RAND_get_rand_method();
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if (meth && meth->pseudorand)
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return meth->pseudorand(buf,num);
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return(-1);
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}
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int RAND_status(void)
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{
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RAND_METHOD *meth = RAND_get_rand_method();
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if (meth && meth->status)
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return meth->status();
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return 0;
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}
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