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/* crypto/rand/rand_vms.c -*- mode:C; c-file-style: "eay" -*- */
/* Written by Richard Levitte <richard@levitte.org> for the OpenSSL
 * project 2000.
 */
/* ====================================================================
 * 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).
 *
 */

#include <openssl/rand.h>
#include "rand_lcl.h"

#if defined(OPENSSL_SYS_VMS)

#include <descrip.h>
#include <jpidef.h>
#include <ssdef.h>
#include <starlet.h>
#ifdef __DECC
# pragma message disable DOLLARID
#endif

static struct items_data_st
	{
	short length, code;	/* length is amount of bytes */
	} items_data[] =
		{ { 4, JPI$_BUFIO },
		  { 4, JPI$_CPUTIM },
		  { 4, JPI$_DIRIO },
		  { 8, JPI$_LOGINTIM },
		  { 4, JPI$_PAGEFLTS },
		  { 4, JPI$_PID },
		  { 4, JPI$_WSSIZE },
		  { 0, 0 }
		};
		  
int RAND_poll(void)
	{
	long pid, iosb[2];
	int status = 0;
	struct
		{
		short length, code;
		long *buffer;
		int *retlen;
		} item[32], *pitem;
	unsigned char data_buffer[256];
	short total_length = 0;
	struct items_data_st *pitems_data;

	pitems_data = items_data;
	pitem = item;

	/* Setup */
	while (pitems_data->length
		&& (total_length + pitems_data->length <= 256))
		{
		pitem->length = pitems_data->length;
		pitem->code = pitems_data->code;
		pitem->buffer = (long *)&data_buffer[total_length];
		pitem->retlen = 0;
		total_length += pitems_data->length;
		pitems_data++;
		pitem++;
		}
	pitem->length = pitem->code = 0;

	/*
	 * Scan through all the processes in the system and add entropy with
	 * results from the processes that were possible to look at.
	 * However, view the information as only half trustable.
	 */
	pid = -1;			/* search context */
	while ((status = sys$getjpiw(0, &pid,  0, item, iosb, 0, 0))
		!= SS$_NOMOREPROC)
		{
		if (status == SS$_NORMAL)
			{
			RAND_add(data_buffer, total_length, total_length/2);
			}
		}
	sys$gettim(iosb);
	RAND_add((unsigned char *)iosb, sizeof(iosb), sizeof(iosb)/2);
	return 1;
}

#endif