crypto/rand/rand_vms.c

   1 /*
   2  * Copyright 2001-2017 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 #include "e_os.h"
  11
  12 #if defined(OPENSSL_SYS_VMS)
  13 # include <openssl/rand.h>
  14 # include "rand_lcl.h"
  15 # include <descrip.h>
  16 # include <jpidef.h>
  17 # include <ssdef.h>
  18 # include <starlet.h>
  19 # include <efndef>
  20 # ifdef __DECC
  21 #  pragma message disable DOLLARID
  22 # endif
  23
  24 # ifndef OPENSSL_RAND_SEED_OS
  25 #  error "Unsupported seeding method configured; must be os"
  26 # endif
  27
  28 /*
  29  * Use 32-bit pointers almost everywhere.  Define the type to which to cast a
  30  * pointer passed to an external function.
  31  */
  32 # if __INITIAL_POINTER_SIZE == 64
  33 #  define PTR_T __void_ptr64
  34 #  pragma pointer_size save
  35 #  pragma pointer_size 32
  36 # else
  37 #  define PTR_T void *
  38 # endif
  39
  40 static struct items_data_st {
  41     short length, code;         /* length is number of bytes */
  42 } items_data[] = {
  43     {4, JPI$_BUFIO},
  44     {4, JPI$_CPUTIM},
  45     {4, JPI$_DIRIO},
  46     {4, JPI$_IMAGECOUNT},
  47     {8, JPI$_LAST_LOGIN_I},
  48     {8, JPI$_LOGINTIM},
  49     {4, JPI$_PAGEFLTS},
  50     {4, JPI$_PID},
  51     {4, JPI$_PPGCNT},
  52     {4, JPI$_WSPEAK},
  53     {4, JPI$_FINALEXC},
  54     {0, 0}
  55 };
  56
  57 int RAND_poll_ex(RAND_poll_fn cb, void *arg)
  58 {
  59     /* determine the number of items in the JPI array */
  60     struct items_data_st item_entry;
  61     int item_entry_count = OSSL_NELEM(items_data);
  62     /* Create the JPI itemlist array to hold item_data content */
  63     struct {
  64         short length, code;
  65         int *buffer;
  66         int *retlen;
  67     } item[item_entry_count], *pitem;
  68     struct items_data_st *pitems_data;
  69     int data_buffer[(item_entry_count * 2) + 4]; /* 8 bytes per entry max */
  70     int iosb[2];
  71     int sys_time[2];
  72     int *ptr;
  73     int i, j ;
  74     int tmp_length   = 0;
  75     int total_length = 0;
  76
  77     /* Setup itemlist for GETJPI */
  78     pitems_data = items_data;
  79     for (pitem = item; pitems_data->length != 0; pitem++) {
  80         pitem->length = pitems_data->length;
  81         pitem->code   = pitems_data->code;
  82         pitem->buffer = &data_buffer[total_length];
  83         pitem->retlen = 0;
  84         /* total_length is in longwords */
  85         total_length += pitems_data->length / 4;
  86         pitems_data++;
  87     }
  88     pitem->length = pitem->code = 0;
  89
  90     /* Fill data_buffer with various info bits from this process */
  91     if (sys$getjpiw(EFN$C_ENF, NULL, NULL, item, &iosb, 0, 0) != SS$_NORMAL)
  92         return 0;
  93
  94     /* Now twist that data to seed the SSL random number init */
  95     for (i = 0; i < total_length; i++) {
  96         sys$gettim((struct _generic_64 *)&sys_time[0]);
  97         srand(sys_time[0] * data_buffer[0] * data_buffer[1] + i);
  98
  99         if (i == (total_length - 1)) { /* for JPI$_FINALEXC */
 100             ptr = &data_buffer[i];
 101             for (j = 0; j < 4; j++) {
 102                 data_buffer[i + j] = ptr[j];
 103                 /* OK to use rand() just to scramble the seed */
 104                 data_buffer[i + j] ^= (sys_time[0] ^ rand());
 105                 tmp_length++;
 106             }
 107         } else {
 108             /* OK to use rand() just to scramble the seed */
 109             data_buffer[i] ^= (sys_time[0] ^ rand());
 110         }
 111     }
 112
 113     total_length += (tmp_length - 1);
 114
 115     /* size of seed is total_length*4 bytes (64bytes) */
 116     cb(arg, (PTR_T)data_buffer, total_length * 4, total_length * 2);
 117     return 1;
 118 }
 119
 120 #endif