rand_vms.c revision 296465 
1/* crypto/rand/rand_vms.c -*- mode:C; c-file-style: "eay" -*- */
2/*
3 * Written by Richard Levitte <richard@levitte.org> for the OpenSSL project
4 * 2000.
5 */
6/* ====================================================================
7 * Copyright (c) 1998-2000 The OpenSSL Project.  All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in
18 *    the documentation and/or other materials provided with the
19 *    distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 *    software must display the following acknowledgment:
23 *    "This product includes software developed by the OpenSSL Project
24 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 *    endorse or promote products derived from this software without
28 *    prior written permission. For written permission, please contact
29 *    openssl-core@openssl.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 *    nor may "OpenSSL" appear in their names without prior written
33 *    permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 *    acknowledgment:
37 *    "This product includes software developed by the OpenSSL Project
38 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com).  This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60#include <openssl/rand.h>
61#include "rand_lcl.h"
62
63#if defined(OPENSSL_SYS_VMS)
64
65# include <descrip.h>
66# include <jpidef.h>
67# include <ssdef.h>
68# include <starlet.h>
69# ifdef __DECC
70#  pragma message disable DOLLARID
71# endif
72
73static struct items_data_st {
74    short length, code;         /* length is amount of bytes */
75} items_data[] = {
76    {
77        4, JPI$_BUFIO
78    },
79    {
80        4, JPI$_CPUTIM
81    },
82    {
83        4, JPI$_DIRIO
84    },
85    {
86        8, JPI$_LOGINTIM
87    },
88    {
89        4, JPI$_PAGEFLTS
90    },
91    {
92        4, JPI$_PID
93    },
94    {
95        4, JPI$_WSSIZE
96    },
97    {
98        0, 0
99    }
100};
101
102int RAND_poll(void)
103{
104    long pid, iosb[2];
105    int status = 0;
106    struct {
107        short length, code;
108        long *buffer;
109        int *retlen;
110    } item[32], *pitem;
111    unsigned char data_buffer[256];
112    short total_length = 0;
113    struct items_data_st *pitems_data;
114
115    pitems_data = items_data;
116    pitem = item;
117
118    /* Setup */
119    while (pitems_data->length && (total_length + pitems_data->length <= 256)) {
120        pitem->length = pitems_data->length;
121        pitem->code = pitems_data->code;
122        pitem->buffer = (long *)&data_buffer[total_length];
123        pitem->retlen = 0;
124        total_length += pitems_data->length;
125        pitems_data++;
126        pitem ++;
127    }
128    pitem->length = pitem->code = 0;
129
130    /*
131     * Scan through all the processes in the system and add entropy with
132     * results from the processes that were possible to look at.
133     * However, view the information as only half trustable.
134     */
135    pid = -1;                   /* search context */
136    while ((status = sys$getjpiw(0, &pid, 0, item, iosb, 0, 0))
137           != SS$_NOMOREPROC) {
138        if (status == SS$_NORMAL) {
139            RAND_add(data_buffer, total_length, total_length / 2);
140        }
141    }
142    sys$gettim(iosb);
143    RAND_add((unsigned char *)iosb, sizeof(iosb), sizeof(iosb) / 2);
144    return 1;
145}
146
147#endif
148