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 #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 */