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 "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 APIRET APIENTRY(*DosPerfSysCall) (ULONG ulCommand, ULONG ulParm1, ULONG ulParm2, ULONG ulParm3) = NULL;
  82 APIRET APIENTRY(*DosQuerySysState) (ULONG func, ULONG arg1, ULONG pid, ULONG _res_, PVOID buf, ULONG bufsz) = NULL;
  83 HMODULE hDoscalls = 0;
  84
  85 int RAND_poll(void)
  86 {
  87     char failed_module[20];
  88     QWORD qwTime;
  89     ULONG SysVars[QSV_FOREGROUND_PROCESS];
  90
  91     if (hDoscalls == 0) {
  92         ULONG rc = DosLoadModule(failed_module, sizeof(failed_module), "DOSCALLS", &hDoscalls);
  93
  94         if (rc == 0) {
  95             rc = DosQueryProcAddr(hDoscalls, 976, NULL, (PFN *)&DosPerfSysCall);
  96
  97             if (rc)
  98                 DosPerfSysCall = NULL;
  99
 100             rc = DosQueryProcAddr(hDoscalls, 368, NULL, (PFN *)&DosQuerySysState);
 101
 102             if (rc)
 103                 DosQuerySysState = NULL;
 104         }
 105     }
 106
 107     /* Sample the hi-res timer, runs at around 1.1 MHz */
 108     DosTmrQueryTime(&qwTime);
 109     RAND_add(&qwTime, sizeof(qwTime), 2);
 110
 111     /* Sample a bunch of system variables, includes various process & memory statistics */
 112     DosQuerySysInfo(1, QSV_FOREGROUND_PROCESS, SysVars, sizeof(SysVars));
 113     RAND_add(SysVars, sizeof(SysVars), 4);
 114
 115     /* If available, sample CPU registers that count at CPU MHz
 116      * Only fairly new CPUs (PPro & K6 onwards) & OS/2 versions support this
 117      */
 118     if (DosPerfSysCall) {
 119         CPUUTIL util;
 120
 121         if (DosPerfSysCall(CMD_KI_RDCNT, (ULONG)&util, 0, 0) == 0) {
 122             RAND_add(&util, sizeof(util), 10);
 123         }
 124         else {
 125             DosPerfSysCall = NULL;
 126         }
 127     }
 128
 129     /* DosQuerySysState() gives us a huge quantity of process, thread, memory & handle stats */
 130     if (DosQuerySysState) {
 131         char *buffer = OPENSSL_malloc(256 * 1024);
 132
 133         if (DosQuerySysState(0x1F, 0, 0, 0, buffer, 256 * 1024) == 0) {
 134             /* First 4 bytes in buffer is a pointer to the thread count
 135              * there should be at least 1 byte of entropy per thread
 136              */
 137             RAND_add(buffer, 256 * 1024, **(ULONG **)buffer);
 138         }
 139
 140         OPENSSL_free(buffer);
 141         return 1;
 142     }
 143
 144     return 0;
 145 }
 146
 147 #endif /* OPENSSL_SYS_OS2 */