126 lines
3 KiB
C
126 lines
3 KiB
C
/*
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* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include <time.h>
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#include "internal/cryptlib.h"
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#include <openssl/opensslconf.h>
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#include "internal/rand.h"
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#include <openssl/engine.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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/* non-NULL if default_RAND_meth is ENGINE-provided */
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static ENGINE *funct_ref = NULL;
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#endif
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static const RAND_METHOD *default_RAND_meth = NULL;
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int RAND_set_rand_method(const RAND_METHOD *meth)
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{
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#ifndef OPENSSL_NO_ENGINE
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ENGINE_finish(funct_ref);
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funct_ref = NULL;
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#endif
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default_RAND_meth = meth;
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return 1;
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}
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const RAND_METHOD *RAND_get_rand_method(void)
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{
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if (!default_RAND_meth) {
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#ifndef OPENSSL_NO_ENGINE
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ENGINE *e = ENGINE_get_default_RAND();
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if (e) {
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default_RAND_meth = ENGINE_get_RAND(e);
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if (default_RAND_meth == NULL) {
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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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#endif
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default_RAND_meth = RAND_OpenSSL();
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}
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return default_RAND_meth;
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}
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#ifndef OPENSSL_NO_ENGINE
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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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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 == NULL) {
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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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#endif
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void rand_cleanup_int(void)
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{
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const 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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RAND_set_rand_method(NULL);
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}
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void RAND_seed(const void *buf, int num)
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{
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const 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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const 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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const 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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#if OPENSSL_API_COMPAT < 0x10100000L
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int RAND_pseudo_bytes(unsigned char *buf, int num)
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{
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const 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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#endif
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int RAND_status(void)
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{
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const 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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