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
81# ifndef __KLIBC__
82APIRET APIENTRY(*DosPerfSysCall) (ULONG ulCommand, ULONG ulParm1,
83                                  ULONG ulParm2, ULONG ulParm3) = NULL;
84APIRET APIENTRY(*DosQuerySysState) (ULONG func, ULONG arg1, ULONG pid,
85                                    ULONG _res_, PVOID buf, ULONG bufsz) =
86    NULL;
87# endif
88HMODULE hDoscalls = 0;
89
90int 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)
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 */
171