/* crypto/rand/rand_lib.c */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #include <stdio.h> #include <time.h> #include <openssl/rand.h> #include <openssl/engine.h> static ENGINE *rand_engine=NULL; #if 0 void RAND_set_rand_method(RAND_METHOD *meth) { rand_meth=meth; } #else int RAND_set_rand_method(ENGINE *engine) { ENGINE *mtmp; mtmp = rand_engine; if (!ENGINE_init(engine)) return 0; rand_engine = engine; /* SHOULD ERROR CHECK THIS!!! */ ENGINE_finish(mtmp); return 1; } #endif RAND_METHOD *RAND_get_rand_method(void) { if (rand_engine == NULL && (rand_engine = ENGINE_get_default_RAND()) == NULL) return NULL; return ENGINE_get_RAND(rand_engine); } void RAND_cleanup(void) { RAND_METHOD *meth = RAND_get_rand_method(); if (meth && meth->cleanup) meth->cleanup(); } void RAND_seed(const void *buf, int num) { RAND_METHOD *meth = RAND_get_rand_method(); if (meth && meth->seed) meth->seed(buf,num); } void RAND_add(const void *buf, int num, double entropy) { RAND_METHOD *meth = RAND_get_rand_method(); if (meth && meth->add) meth->add(buf,num,entropy); } int RAND_bytes(unsigned char *buf, int num) { RAND_METHOD *meth = RAND_get_rand_method(); if (meth && meth->bytes) return meth->bytes(buf,num); return(-1); } int RAND_pseudo_bytes(unsigned char *buf, int num) { RAND_METHOD *meth = RAND_get_rand_method(); if (meth && meth->pseudorand) return meth->pseudorand(buf,num); return(-1); } int RAND_status(void) { RAND_METHOD *meth = RAND_get_rand_method(); if (meth && meth->status) return meth->status(); return 0; }