crypto/rand/rand_vms.c

   1 /*
   2  * Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 /*
  11  * Modified by VMS Software, Inc (2016)
  12  *    Eliminate looping through all processes (performance)
  13  *    Add additional randomizations using rand() function
  14  */
  15
  16 #include <openssl/rand.h>
  17 #include "rand_lcl.h"
  18
  19 #if defined(OPENSSL_SYS_VMS)
  20 # include <descrip.h>
  21 # include <jpidef.h>
  22 # include <ssdef.h>
  23 # include <starlet.h>
  24 # include <efndef>
  25 # ifdef __DECC
  26 #  pragma message disable DOLLARID
  27 # endif
  28
  29 /*
  30  * Use 32-bit pointers almost everywhere.  Define the type to which to cast a
  31  * pointer passed to an external function.
  32  */
  33 # if __INITIAL_POINTER_SIZE == 64
  34 #  define PTR_T __void_ptr64
  35 #  pragma pointer_size save
  36 #  pragma pointer_size 32
  37 # else                          /* __INITIAL_POINTER_SIZE == 64 */
  38 #  define PTR_T void *
  39 # endif                         /* __INITIAL_POINTER_SIZE == 64 [else] */
  40
  41 static struct items_data_st {
  42     short length, code;         /* length is number of bytes */
  43 } items_data[] = {
  44     {4, JPI$_BUFIO},
  45     {4, JPI$_CPUTIM},
  46     {4, JPI$_DIRIO},
  47     {4, JPI$_IMAGECOUNT},
  48     {8, JPI$_LAST_LOGIN_I},
  49     {8, JPI$_LOGINTIM},
  50     {4, JPI$_PAGEFLTS},
  51     {4, JPI$_PID},
  52     {4, JPI$_PPGCNT},
  53     {4, JPI$_WSPEAK},
  54     {4, JPI$_FINALEXC},
  55     {0, 0}                      /* zero terminated */
  56 };
  57
  58 int RAND_poll(void)
  59 {
  60
  61     /* determine the number of items in the JPI array */
  62
  63     struct items_data_st item_entry;
  64     int item_entry_count = sizeof(items_data)/sizeof(item_entry);
  65
  66     /* Create the JPI itemlist array to hold item_data content */
  67
  68     struct {
  69         short length, code;
  70         int *buffer;
  71         int *retlen;
  72     } item[item_entry_count], *pitem; /* number of entries in items_data */
  73
  74     struct items_data_st *pitems_data;
  75     int data_buffer[(item_entry_count*2)+4]; /* 8 bytes per entry max */
  76     int iosb[2];
  77     int sys_time[2];
  78     int *ptr;
  79     int i, j ;
  80     int tmp_length   = 0;
  81     int total_length = 0;
  82
  83     pitems_data = items_data;
  84     pitem = item;
  85
  86
  87     /* Setup itemlist for GETJPI */
  88     while (pitems_data->length) {
  89         pitem->length = pitems_data->length;
  90         pitem->code   = pitems_data->code;
  91         pitem->buffer = &data_buffer[total_length];
  92         pitem->retlen = 0;
  93         /* total_length is in longwords */
  94         total_length += pitems_data->length/4;
  95         pitems_data++;
  96         pitem ++;
  97     }
  98     pitem->length = pitem->code = 0;
  99
 100     /* Fill data_buffer with various info bits from this process */
 101     /* and twist that data to seed the SSL random number init    */
 102
 103     if (sys$getjpiw(EFN$C_ENF, NULL, NULL, item, &iosb, 0, 0) == SS$_NORMAL) {
 104         for (i = 0; i < total_length; i++) {
 105             sys$gettim((struct _generic_64 *)&sys_time[0]);
 106             srand(sys_time[0] * data_buffer[0] * data_buffer[1] + i);
 107
 108             if (i == (total_length - 1)) { /* for JPI$_FINALEXC */
 109                 ptr = &data_buffer[i];
 110                 for (j = 0; j < 4; j++) {
 111                     data_buffer[i + j] = ptr[j];
 112                     /* OK to use rand() just to scramble the seed */
 113                     data_buffer[i + j] ^= (sys_time[0] ^ rand());
 114                     tmp_length++;
 115                 }
 116             } else {
 117                 /* OK to use rand() just to scramble the seed */
 118                 data_buffer[i] ^= (sys_time[0] ^ rand());
 119             }
 120         }
 121
 122         total_length += (tmp_length - 1);
 123
 124         /* size of seed is total_length*4 bytes (64bytes) */
 125         RAND_add((PTR_T) data_buffer, total_length*4, total_length * 2);
 126     } else {
 127         return 0;
 128     }
 129
 130     return 1;
 131 }
 132
 133 #endif