source: trunk/sys/libcrypto/others/rand_vms.c @ 47

/* 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