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      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 (at) 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 (at) cryptsoft.com).  This product includes software written by Tim
     52  * Hudson (tjh (at) 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 #ifndef __KLIBC__
     82 APIRET APIENTRY(*DosPerfSysCall) (ULONG ulCommand, ULONG ulParm1, ULONG ulParm2, ULONG ulParm3) = NULL;
     83 APIRET APIENTRY(*DosQuerySysState) (ULONG func, ULONG arg1, ULONG pid, ULONG _res_, PVOID buf, ULONG bufsz) = NULL;
     84 #endif
     85 HMODULE hDoscalls = 0;
     86 
     87 int RAND_poll(void)
     88 {
     89     char failed_module[20];
     90     QWORD qwTime;
     91     ULONG SysVars[QSV_FOREGROUND_PROCESS];
     92 
     93     if (hDoscalls == 0) {
     94         ULONG rc = DosLoadModule(failed_module, sizeof(failed_module), "DOSCALLS", &hDoscalls);
     95 
     96 #ifndef __KLIBC__
     97         if (rc == 0) {
     98             rc = DosQueryProcAddr(hDoscalls, 976, NULL, (PFN *)&DosPerfSysCall);
     99 
    100             if (rc)
    101                 DosPerfSysCall = NULL;
    102 
    103             rc = DosQueryProcAddr(hDoscalls, 368, NULL, (PFN *)&DosQuerySysState);
    104 
    105             if (rc)
    106                 DosQuerySysState = NULL;
    107         }
    108 #endif
    109     }
    110 
    111     /* Sample the hi-res timer, runs at around 1.1 MHz */
    112     DosTmrQueryTime(&qwTime);
    113     RAND_add(&qwTime, sizeof(qwTime), 2);
    114 
    115     /* Sample a bunch of system variables, includes various process & memory statistics */
    116     DosQuerySysInfo(1, QSV_FOREGROUND_PROCESS, SysVars, sizeof(SysVars));
    117     RAND_add(SysVars, sizeof(SysVars), 4);
    118 
    119     /* If available, sample CPU registers that count at CPU MHz
    120      * Only fairly new CPUs (PPro & K6 onwards) & OS/2 versions support this
    121      */
    122     if (DosPerfSysCall) {
    123         CPUUTIL util;
    124 
    125         if (DosPerfSysCall(CMD_KI_RDCNT, (ULONG)&util, 0, 0) == 0) {
    126             RAND_add(&util, sizeof(util), 10);
    127         }
    128         else {
    129 #ifndef __KLIBC__
    130             DosPerfSysCall = NULL;
    131 #endif
    132         }
    133     }
    134 
    135     /* DosQuerySysState() gives us a huge quantity of process, thread, memory & handle stats */
    136     if (DosQuerySysState) {
    137         char *buffer = OPENSSL_malloc(256 * 1024);
    138 
    139         if (DosQuerySysState(0x1F, 0, 0, 0, buffer, 256 * 1024) == 0) {
    140             /* First 4 bytes in buffer is a pointer to the thread count
    141              * there should be at least 1 byte of entropy per thread
    142              */
    143             RAND_add(buffer, 256 * 1024, **(ULONG **)buffer);
    144         }
    145 
    146         OPENSSL_free(buffer);
    147         return 1;
    148     }
    149 
    150     return 0;
    151 }
    152 
    153 #endif /* OPENSSL_SYS_OS2 */
    154