rand_os2.c revision 296465 
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
70typedef 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
81APIRET APIENTRY(*DosPerfSysCall) (ULONG ulCommand, ULONG ulParm1,
82                                  ULONG ulParm2, ULONG ulParm3) = NULL;
83APIRET APIENTRY(*DosQuerySysState) (ULONG func, ULONG arg1, ULONG pid,
84                                    ULONG _res_, PVOID buf, ULONG bufsz) =
85    NULL;
86HMODULE hDoscalls = 0;
87
88int RAND_poll(void)
89{
90    char failed_module[20];
91    QWORD qwTime;
92    ULONG SysVars[QSV_FOREGROUND_PROCESS];
93
94    if (hDoscalls == 0) {
95        ULONG rc =
96            DosLoadModule(failed_module, sizeof(failed_module), "DOSCALLS",
97                          &hDoscalls);
98
99        if (rc == 0) {
100            rc = DosQueryProcAddr(hDoscalls, 976, NULL,
101                                  (PFN *) & DosPerfSysCall);
102
103            if (rc)
104                DosPerfSysCall = NULL;
105
106            rc = DosQueryProcAddr(hDoscalls, 368, NULL,
107                                  (PFN *) & DosQuerySysState);
108
109            if (rc)
110                DosQuerySysState = NULL;
111        }
112    }
113
114    /* Sample the hi-res timer, runs at around 1.1 MHz */
115    DosTmrQueryTime(&qwTime);
116    RAND_add(&qwTime, sizeof(qwTime), 2);
117
118    /*
119     * Sample a bunch of system variables, includes various process & memory
120     * statistics
121     */
122    DosQuerySysInfo(1, QSV_FOREGROUND_PROCESS, SysVars, sizeof(SysVars));
123    RAND_add(SysVars, sizeof(SysVars), 4);
124
125    /*
126     * If available, sample CPU registers that count at CPU MHz Only fairly
127     * new CPUs (PPro & K6 onwards) & OS/2 versions support this
128     */
129    if (DosPerfSysCall) {
130        CPUUTIL util;
131
132        if (DosPerfSysCall(CMD_KI_RDCNT, (ULONG) & util, 0, 0) == 0) {
133            RAND_add(&util, sizeof(util), 10);
134        } else {
135            DosPerfSysCall = NULL;
136        }
137    }
138
139    /*
140     * DosQuerySysState() gives us a huge quantity of process, thread, memory
141     * & handle stats
142     */
143    if (DosQuerySysState) {
144        char *buffer = OPENSSL_malloc(256 * 1024);
145
146        if (DosQuerySysState(0x1F, 0, 0, 0, buffer, 256 * 1024) == 0) {
147            /*
148             * First 4 bytes in buffer is a pointer to the thread count there
149             * should be at least 1 byte of entropy per thread
150             */
151            RAND_add(buffer, 256 * 1024, **(ULONG **) buffer);
152        }
153
154        OPENSSL_free(buffer);
155        return 1;
156    }
157
158    return 0;
159}
160
161#endif                          /* OPENSSL_SYS_OS2 */
162