crypto/rand/rand_vms.c

   1 /*
   2  * Written by Richard Levitte <richard@levitte.org> for the OpenSSL project
   3  * 2000.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 1998-2000 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    openssl-core@openssl.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <openssl/rand.h>
  60 #include "rand_lcl.h"
  61
  62 #if defined(OPENSSL_SYS_VMS)
  63
  64 # include <descrip.h>
  65 # include <jpidef.h>
  66 # include <ssdef.h>
  67 # include <starlet.h>
  68 # ifdef __DECC
  69 #  pragma message disable DOLLARID
  70 # endif
  71
  72 /*
  73  * Use 32-bit pointers almost everywhere.  Define the type to which to cast a
  74  * pointer passed to an external function.
  75  */
  76 # if __INITIAL_POINTER_SIZE == 64
  77 #  define PTR_T __void_ptr64
  78 #  pragma pointer_size save
  79 #  pragma pointer_size 32
  80 # else                          /* __INITIAL_POINTER_SIZE == 64 */
  81 #  define PTR_T void *
  82 # endif                         /* __INITIAL_POINTER_SIZE == 64 [else] */
  83
  84 static struct items_data_st {
  85     short length, code;         /* length is amount of bytes */
  86 } items_data[] = {
  87     {
  88         4, JPI$_BUFIO
  89     },
  90     {
  91         4, JPI$_CPUTIM
  92     },
  93     {
  94         4, JPI$_DIRIO
  95     },
  96     {
  97         8, JPI$_LOGINTIM
  98     },
  99     {
 100         4, JPI$_PAGEFLTS
 101     },
 102     {
 103         4, JPI$_PID
 104     },
 105     {
 106         4, JPI$_WSSIZE
 107     },
 108     {
 109         0, 0
 110     }
 111 };
 112
 113 int RAND_poll(void)
 114 {
 115     long pid, iosb[2];
 116     int status = 0;
 117     struct {
 118         short length, code;
 119         long *buffer;
 120         int *retlen;
 121     } item[32], *pitem;
 122     unsigned char data_buffer[256];
 123     short total_length = 0;
 124     struct items_data_st *pitems_data;
 125
 126     pitems_data = items_data;
 127     pitem = item;
 128
 129     /* Setup */
 130     while (pitems_data->length && (total_length + pitems_data->length <= 256)) {
 131         pitem->length = pitems_data->length;
 132         pitem->code = pitems_data->code;
 133         pitem->buffer = (long *)&data_buffer[total_length];
 134         pitem->retlen = 0;
 135         total_length += pitems_data->length;
 136         pitems_data++;
 137         pitem ++;
 138     }
 139     pitem->length = pitem->code = 0;
 140
 141     /*
 142      * Scan through all the processes in the system and add entropy with
 143      * results from the processes that were possible to look at.
 144      * However, view the information as only half trustable.
 145      */
 146     pid = -1;                   /* search context */
 147     while ((status = sys$getjpiw(0, &pid, 0, item, iosb, 0, 0))
 148            != SS$_NOMOREPROC) {
 149         if (status == SS$_NORMAL) {
 150             RAND_add((PTR_T) data_buffer, total_length, total_length / 2);
 151         }
 152     }
 153     sys$gettim(iosb);
 154     RAND_add((PTR_T) iosb, sizeof(iosb), sizeof(iosb) / 2);
 155     return 1;
 156 }
 157
 158 #endif