crypto/rand/rand_os2.c

   1 /* crypto/rand/rand_os2.c */
   2 /* ====================================================================
   3  * Copyright (c) 1998-2000 The OpenSSL Project.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the
  15  *    distribution.
  16  *
  17  * 3. All advertising materials mentioning features or use of this
  18  *    software must display the following acknowledgment:
  19  *    "This product includes software developed by the OpenSSL Project
  20  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  21  *
  22  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  23  *    endorse or promote products derived from this software without
  24  *    prior written permission. For written permission, please contact
  25  *    openssl-core@openssl.org.
  26  *
  27  * 5. Products derived from this software may not be called "OpenSSL"
  28  *    nor may "OpenSSL" appear in their names without prior written
  29  *    permission of the OpenSSL Project.
  30  *
  31  * 6. Redistributions of any form whatsoever must retain the following
  32  *    acknowledgment:
  33  *    "This product includes software developed by the OpenSSL Project
  34  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  35  *
  36  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  37  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  38  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  39  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  40  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  41  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  42  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  43  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  44  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  45  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  46  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  47  * OF THE POSSIBILITY OF SUCH DAMAGE.
  48  * ====================================================================
  49  *
  50  * This product includes cryptographic software written by Eric Young
  51  * (eay@cryptsoft.com).  This product includes software written by Tim
  52  * Hudson (tjh@cryptsoft.com).
  53  *
  54  */
  55
  56 #include "internal/cryptlib.h"
  57 #include <openssl/rand.h>
  58 #include "rand_lcl.h"
  59
  60 #ifdef OPENSSL_SYS_OS2
  61
  62 # define INCL_DOSPROCESS
  63 # define INCL_DOSPROFILE
  64 # define INCL_DOSMISC
  65 # define INCL_DOSMODULEMGR
  66 # include <os2.h>
  67
  68 # define   CMD_KI_RDCNT    (0x63)
  69
  70 typedef struct _CPUUTIL {
  71     ULONG ulTimeLow;            /* Low 32 bits of time stamp */
  72     ULONG ulTimeHigh;           /* High 32 bits of time stamp */
  73     ULONG ulIdleLow;            /* Low 32 bits of idle time */
  74     ULONG ulIdleHigh;           /* High 32 bits of idle time */
  75     ULONG ulBusyLow;            /* Low 32 bits of busy time */
  76     ULONG ulBusyHigh;           /* High 32 bits of busy time */
  77     ULONG ulIntrLow;            /* Low 32 bits of interrupt time */
  78     ULONG ulIntrHigh;           /* High 32 bits of interrupt time */
  79 } CPUUTIL;
  80
  81 # ifndef __KLIBC__
  82 APIRET APIENTRY(*DosPerfSysCall) (ULONG ulCommand, ULONG ulParm1,
  83                                   ULONG ulParm2, ULONG ulParm3) = NULL;
  84 APIRET APIENTRY(*DosQuerySysState) (ULONG func, ULONG arg1, ULONG pid,
  85                                     ULONG _res_, PVOID buf, ULONG bufsz) =
  86     NULL;
  87 # endif
  88 HMODULE hDoscalls = 0;
  89
  90 int RAND_poll(void)
  91 {
  92     char failed_module[20];
  93     QWORD qwTime;
  94     ULONG SysVars[QSV_FOREGROUND_PROCESS];
  95
  96     if (hDoscalls == 0) {
  97         ULONG rc =
  98             DosLoadModule(failed_module, sizeof(failed_module), "DOSCALLS",
  99                           &hDoscalls);
 100
 101 # ifndef __KLIBC__
 102         if (rc == 0) {
 103             rc = DosQueryProcAddr(hDoscalls, 976, NULL,
 104                                   (PFN *) & DosPerfSysCall);
 105
 106             if (rc)
 107                 DosPerfSysCall = NULL;
 108
 109             rc = DosQueryProcAddr(hDoscalls, 368, NULL,
 110                                   (PFN *) & DosQuerySysState);
 111
 112             if (rc)
 113                 DosQuerySysState = NULL;
 114         }
 115 # endif
 116     }
 117
 118     /* Sample the hi-res timer, runs at around 1.1 MHz */
 119     DosTmrQueryTime(&qwTime);
 120     RAND_add(&qwTime, sizeof(qwTime), 2);
 121
 122     /*
 123      * Sample a bunch of system variables, includes various process & memory
 124      * statistics
 125      */
 126     DosQuerySysInfo(1, QSV_FOREGROUND_PROCESS, SysVars, sizeof(SysVars));
 127     RAND_add(SysVars, sizeof(SysVars), 4);
 128
 129     /*
 130      * If available, sample CPU registers that count at CPU MHz Only fairly
 131      * new CPUs (PPro & K6 onwards) & OS/2 versions support this
 132      */
 133     if (DosPerfSysCall) {
 134         CPUUTIL util;
 135
 136         if (DosPerfSysCall(CMD_KI_RDCNT, (ULONG) & util, 0, 0) == 0) {
 137             RAND_add(&util, sizeof(util), 10);
 138         } else {
 139 # ifndef __KLIBC__
 140             DosPerfSysCall = NULL;
 141 # endif
 142         }
 143     }
 144
 145     /*
 146      * DosQuerySysState() gives us a huge quantity of process, thread, memory
 147      * & handle stats
 148      */
 149     if (DosQuerySysState) {
 150         char *buffer = OPENSSL_malloc(256 * 1024);
 151
 152         if (buffer == NULL)
 153             return 0;
 154
 155         if (DosQuerySysState(0x1F, 0, 0, 0, buffer, 256 * 1024) == 0) {
 156             /*
 157              * First 4 bytes in buffer is a pointer to the thread count there
 158              * should be at least 1 byte of entropy per thread
 159              */
 160             RAND_add(buffer, 256 * 1024, **(ULONG **) buffer);
 161         }
 162
 163         OPENSSL_free(buffer);
 164         return 1;
 165     }
 166
 167     return 0;
 168 }
 169
 170 #endif                          /* OPENSSL_SYS_OS2 */