ref: 7be7d0681f567e97fd37f937c2e5e486d6d74eab
dir: /sys/src/ape/lib/openssl/crypto/rand/rand_os2.c/
/* crypto/rand/rand_os2.c */
/* ====================================================================
* Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* [email protected].
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* ([email protected]). This product includes software written by Tim
* Hudson ([email protected]).
*
*/
#include "cryptlib.h"
#include <openssl/rand.h>
#include "rand_lcl.h"
#ifdef OPENSSL_SYS_OS2
#define INCL_DOSPROCESS
#define INCL_DOSPROFILE
#define INCL_DOSMISC
#define INCL_DOSMODULEMGR
#include <os2.h>
#define CMD_KI_RDCNT (0x63)
typedef struct _CPUUTIL {
ULONG ulTimeLow; /* Low 32 bits of time stamp */
ULONG ulTimeHigh; /* High 32 bits of time stamp */
ULONG ulIdleLow; /* Low 32 bits of idle time */
ULONG ulIdleHigh; /* High 32 bits of idle time */
ULONG ulBusyLow; /* Low 32 bits of busy time */
ULONG ulBusyHigh; /* High 32 bits of busy time */
ULONG ulIntrLow; /* Low 32 bits of interrupt time */
ULONG ulIntrHigh; /* High 32 bits of interrupt time */
} CPUUTIL;
APIRET APIENTRY(*DosPerfSysCall) (ULONG ulCommand, ULONG ulParm1, ULONG ulParm2, ULONG ulParm3) = NULL;
APIRET APIENTRY(*DosQuerySysState) (ULONG func, ULONG arg1, ULONG pid, ULONG _res_, PVOID buf, ULONG bufsz) = NULL;
HMODULE hDoscalls = 0;
int RAND_poll(void)
{
char failed_module[20];
QWORD qwTime;
ULONG SysVars[QSV_FOREGROUND_PROCESS];
if (hDoscalls == 0) {
ULONG rc = DosLoadModule(failed_module, sizeof(failed_module), "DOSCALLS", &hDoscalls);
if (rc == 0) {
rc = DosQueryProcAddr(hDoscalls, 976, NULL, (PFN *)&DosPerfSysCall);
if (rc)
DosPerfSysCall = NULL;
rc = DosQueryProcAddr(hDoscalls, 368, NULL, (PFN *)&DosQuerySysState);
if (rc)
DosQuerySysState = NULL;
}
}
/* Sample the hi-res timer, runs at around 1.1 MHz */
DosTmrQueryTime(&qwTime);
RAND_add(&qwTime, sizeof(qwTime), 2);
/* Sample a bunch of system variables, includes various process & memory statistics */
DosQuerySysInfo(1, QSV_FOREGROUND_PROCESS, SysVars, sizeof(SysVars));
RAND_add(SysVars, sizeof(SysVars), 4);
/* If available, sample CPU registers that count at CPU MHz
* Only fairly new CPUs (PPro & K6 onwards) & OS/2 versions support this
*/
if (DosPerfSysCall) {
CPUUTIL util;
if (DosPerfSysCall(CMD_KI_RDCNT, (ULONG)&util, 0, 0) == 0) {
RAND_add(&util, sizeof(util), 10);
}
else {
DosPerfSysCall = NULL;
}
}
/* DosQuerySysState() gives us a huge quantity of process, thread, memory & handle stats */
if (DosQuerySysState) {
char *buffer = OPENSSL_malloc(256 * 1024);
if (DosQuerySysState(0x1F, 0, 0, 0, buffer, 256 * 1024) == 0) {
/* First 4 bytes in buffer is a pointer to the thread count
* there should be at least 1 byte of entropy per thread
*/
RAND_add(buffer, 256 * 1024, **(ULONG **)buffer);
}
OPENSSL_free(buffer);
return 1;
}
return 0;
}
#endif /* OPENSSL_SYS_OS2 */