/* apps/app_rand.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.] *//* ==================================================================== * Copyright (c) 1998-2000 The OpenSSL Project.  All rights reserved. * * 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 above 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 acknowledgment: *    "This product includes software developed by the OpenSSL Project *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to *    endorse or promote products derived from this software without *    prior written permission. For written permission, please contact *    openssl-core@openssl.org. * * 5. Products derived from this software may not be called "OpenSSL" *    nor may "OpenSSL" appear in their names without prior written *    permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following *    acknowledgment: *    "This product includes software developed by the OpenSSL Project *    for use in the OpenSSL Toolkit (http://www.openssl.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED 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 OpenSSL PROJECT OR * ITS 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. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com).  This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */#define NON_MAIN#include "apps.h"#undef NON_MAIN#include <openssl/bio.h>#include <openssl/rand.h>static int seeded = 0;static int egdsocket = 0;int app_RAND_load_file(const char *file, BIO *bio_e, int dont_warn)	{	int consider_randfile = (file == NULL);	char buffer[200];	#ifdef WINDOWS	BIO_printf(bio_e,"Loading 'screen' into random state -");	BIO_flush(bio_e);	RAND_screen();	BIO_printf(bio_e," done\n");#endif	if (file == NULL)		file = RAND_file_name(buffer, sizeof buffer);	else if (RAND_egd(file) > 0)		{		/* we try if the given filename is an EGD socket.		   if it is, we don't write anything back to the file. */		egdsocket = 1;		return 1;		}	if (file == NULL || !RAND_load_file(file, -1))		{		if (RAND_status() == 0 && !dont_warn)			{			BIO_printf(bio_e,"unable to load 'random state'\n");			BIO_printf(bio_e,"This means that the random number generator has not been seeded\n");			BIO_printf(bio_e,"with much random data.\n");			if (consider_randfile) /* explanation does not apply when a file is explicitly named */				{				BIO_printf(bio_e,"Consider setting the RANDFILE environment variable to point at a file that\n");				BIO_printf(bio_e,"'random' data can be kept in (the file will be overwritten).\n");				}			}		return 0;		}	seeded = 1;	return 1;	}long app_RAND_load_files(char *name)	{	char *p,*n;	int last;	long tot=0;	int egd;		for (;;)		{		last=0;		for (p=name; ((*p != '\0') && (*p != LIST_SEPARATOR_CHAR)); p++);		if (*p == '\0') last=1;		*p='\0';		n=name;		name=p+1;		if (*n == '\0') break;		egd=RAND_egd(n);		if (egd > 0)			tot+=egd;		else			tot+=RAND_load_file(n,-1);		if (last) break;		}	if (tot > 512)		app_RAND_allow_write_file();	return(tot);	}int app_RAND_write_file(const char *file, BIO *bio_e)	{	char buffer[200];		if (egdsocket || !seeded)		/* If we did not manage to read the seed file,		 * we should not write a low-entropy seed file back --		 * it would suppress a crucial warning the next time		 * we want to use it. */		return 0;	if (file == NULL)		file = RAND_file_name(buffer, sizeof buffer);	if (file == NULL || !RAND_write_file(file))		{		BIO_printf(bio_e,"unable to write 'random state'\n");		return 0;		}	return 1;	}void app_RAND_allow_write_file(void)	{	seeded = 1;	}