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1/* crypto/rand/rand_win.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58/* ====================================================================
59 * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111
112#include "cryptlib.h"
113#include <openssl/rand.h>
114#include "rand_lcl.h"
115
116#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
117#include <windows.h>
118#ifndef _WIN32_WINNT
119# define _WIN32_WINNT 0x0400
120#endif
121#include <wincrypt.h>
122#include <tlhelp32.h>
123
124/* Intel hardware RNG CSP -- available from
125 * http://developer.intel.com/design/security/rng/redist_license.htm
126 */
127#define PROV_INTEL_SEC 22
128#define INTEL_DEF_PROV L"Intel Hardware Cryptographic Service Provider"
129
130static void readtimer(void);
131static void readscreen(void);
132
133/* It appears like CURSORINFO, PCURSORINFO and LPCURSORINFO are only defined
134 when WINVER is 0x0500 and up, which currently only happens on Win2000.
135 Unfortunately, those are typedefs, so they're a little bit difficult to
136 detect properly. On the other hand, the macro CURSOR_SHOWING is defined
137 within the same conditional, so it can be use to detect the absence of said
138 typedefs. */
139
140#ifndef CURSOR_SHOWING
141/*
142 * Information about the global cursor.
143 */
144typedef struct tagCURSORINFO
145{
146 DWORD cbSize;
147 DWORD flags;
148 HCURSOR hCursor;
149 POINT ptScreenPos;
150} CURSORINFO, *PCURSORINFO, *LPCURSORINFO;
151
152#define CURSOR_SHOWING 0x00000001
153#endif /* CURSOR_SHOWING */
154
155typedef BOOL (WINAPI *CRYPTACQUIRECONTEXTW)(HCRYPTPROV *, LPCWSTR, LPCWSTR,
156 DWORD, DWORD);
157typedef BOOL (WINAPI *CRYPTGENRANDOM)(HCRYPTPROV, DWORD, BYTE *);
158typedef BOOL (WINAPI *CRYPTRELEASECONTEXT)(HCRYPTPROV, DWORD);
159
160typedef HWND (WINAPI *GETFOREGROUNDWINDOW)(VOID);
161typedef BOOL (WINAPI *GETCURSORINFO)(PCURSORINFO);
162typedef DWORD (WINAPI *GETQUEUESTATUS)(UINT);
163
164typedef HANDLE (WINAPI *CREATETOOLHELP32SNAPSHOT)(DWORD, DWORD);
165typedef BOOL (WINAPI *CLOSETOOLHELP32SNAPSHOT)(HANDLE);
166typedef BOOL (WINAPI *HEAP32FIRST)(LPHEAPENTRY32, DWORD, DWORD);
167typedef BOOL (WINAPI *HEAP32NEXT)(LPHEAPENTRY32);
168typedef BOOL (WINAPI *HEAP32LIST)(HANDLE, LPHEAPLIST32);
169typedef BOOL (WINAPI *PROCESS32)(HANDLE, LPPROCESSENTRY32);
170typedef BOOL (WINAPI *THREAD32)(HANDLE, LPTHREADENTRY32);
171typedef BOOL (WINAPI *MODULE32)(HANDLE, LPMODULEENTRY32);
172
173#include <lmcons.h>
174#ifndef OPENSSL_SYS_WINCE
175#include <lmstats.h>
176#endif
177#if 1 /* The NET API is Unicode only. It requires the use of the UNICODE
178 * macro. When UNICODE is defined LPTSTR becomes LPWSTR. LMSTR was
179 * was added to the Platform SDK to allow the NET API to be used in
180 * non-Unicode applications provided that Unicode strings were still
181 * used for input. LMSTR is defined as LPWSTR.
182 */
183typedef NET_API_STATUS (NET_API_FUNCTION * NETSTATGET)
184 (LPWSTR, LPWSTR, DWORD, DWORD, LPBYTE*);
185typedef NET_API_STATUS (NET_API_FUNCTION * NETFREE)(LPBYTE);
186#endif /* 1 */
187
188int RAND_poll(void)
189{
190 MEMORYSTATUS m;
191 HCRYPTPROV hProvider = 0;
192 BYTE buf[64];
193 DWORD w;
194 HWND h;
195
196 HMODULE advapi, kernel, user, netapi;
197 CRYPTACQUIRECONTEXTW acquire = 0;
198 CRYPTGENRANDOM gen = 0;
199 CRYPTRELEASECONTEXT release = 0;
200#if 1 /* There was previously a problem with NETSTATGET. Currently, this
201 * section is still experimental, but if all goes well, this conditional
202 * will be removed
203 */
204 NETSTATGET netstatget = 0;
205 NETFREE netfree = 0;
206#endif /* 1 */
207
208 /* Determine the OS version we are on so we can turn off things
209 * that do not work properly.
210 */
211 OSVERSIONINFO osverinfo ;
212 osverinfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO) ;
213 GetVersionEx( &osverinfo ) ;
214
215#if defined(OPENSSL_SYS_WINCE) && WCEPLATFORM!=MS_HPC_PRO
216#ifndef CryptAcquireContext
217#define CryptAcquireContext CryptAcquireContextW
218#endif
219 /* poll the CryptoAPI PRNG */
220 /* The CryptoAPI returns sizeof(buf) bytes of randomness */
221 if (CryptAcquireContext(&hProvider, 0, 0, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT))
222 {
223 if (CryptGenRandom(hProvider, sizeof(buf), buf))
224 RAND_add(buf, sizeof(buf), sizeof(buf));
225 CryptReleaseContext(hProvider, 0);
226 }
227#endif
228
229#ifndef OPENSSL_SYS_WINCE
230 /*
231 * None of below libraries are present on Windows CE, which is
232 * why we #ifndef the whole section. This also excuses us from
233 * handling the GetProcAddress issue. The trouble is that in
234 * real Win32 API GetProcAddress is available in ANSI flavor
235 * only. In WinCE on the other hand GetProcAddress is a macro
236 * most commonly defined as GetProcAddressW, which accepts
237 * Unicode argument. If we were to call GetProcAddress under
238 * WinCE, I'd recommend to either redefine GetProcAddress as
239 * GetProcAddressA (there seem to be one in common CE spec) or
240 * implement own shim routine, which would accept ANSI argument
241 * and expand it to Unicode.
242 */
243
244 /* load functions dynamically - not available on all systems */
245 advapi = LoadLibrary(TEXT("ADVAPI32.DLL"));
246 kernel = LoadLibrary(TEXT("KERNEL32.DLL"));
247 user = LoadLibrary(TEXT("USER32.DLL"));
248 netapi = LoadLibrary(TEXT("NETAPI32.DLL"));
249
250#if 1 /* There was previously a problem with NETSTATGET. Currently, this
251 * section is still experimental, but if all goes well, this conditional
252 * will be removed
253 */
254 if (netapi)
255 {
256 netstatget = (NETSTATGET) GetProcAddress(netapi,"NetStatisticsGet");
257 netfree = (NETFREE) GetProcAddress(netapi,"NetApiBufferFree");
258 }
259
260 if (netstatget && netfree)
261 {
262 LPBYTE outbuf;
263 /* NetStatisticsGet() is a Unicode only function
264 * STAT_WORKSTATION_0 contains 45 fields and STAT_SERVER_0
265 * contains 17 fields. We treat each field as a source of
266 * one byte of entropy.
267 */
268
269 if (netstatget(NULL, L"LanmanWorkstation", 0, 0, &outbuf) == 0)
270 {
271 RAND_add(outbuf, sizeof(STAT_WORKSTATION_0), 45);
272 netfree(outbuf);
273 }
274 if (netstatget(NULL, L"LanmanServer", 0, 0, &outbuf) == 0)
275 {
276 RAND_add(outbuf, sizeof(STAT_SERVER_0), 17);
277 netfree(outbuf);
278 }
279 }
280
281 if (netapi)
282 FreeLibrary(netapi);
283#endif /* 1 */
284
285 /* It appears like this can cause an exception deep within ADVAPI32.DLL
286 * at random times on Windows 2000. Reported by Jeffrey Altman.
287 * Only use it on NT.
288 */
289 /* Wolfgang Marczy <WMarczy@topcall.co.at> reports that
290 * the RegQueryValueEx call below can hang on NT4.0 (SP6).
291 * So we don't use this at all for now. */
292#if 0
293 if ( osverinfo.dwPlatformId == VER_PLATFORM_WIN32_NT &&
294 osverinfo.dwMajorVersion < 5)
295 {
296 /* Read Performance Statistics from NT/2000 registry
297 * The size of the performance data can vary from call
298 * to call so we must guess the size of the buffer to use
299 * and increase its size if we get an ERROR_MORE_DATA
300 * return instead of ERROR_SUCCESS.
301 */
302 LONG rc=ERROR_MORE_DATA;
303 char * buf=NULL;
304 DWORD bufsz=0;
305 DWORD length;
306
307 while (rc == ERROR_MORE_DATA)
308 {
309 buf = realloc(buf,bufsz+8192);
310 if (!buf)
311 break;
312 bufsz += 8192;
313
314 length = bufsz;
315 rc = RegQueryValueEx(HKEY_PERFORMANCE_DATA, TEXT("Global"),
316 NULL, NULL, buf, &length);
317 }
318 if (rc == ERROR_SUCCESS)
319 {
320 /* For entropy count assume only least significant
321 * byte of each DWORD is random.
322 */
323 RAND_add(&length, sizeof(length), 0);
324 RAND_add(buf, length, length / 4.0);
325
326 /* Close the Registry Key to allow Windows to cleanup/close
327 * the open handle
328 * Note: The 'HKEY_PERFORMANCE_DATA' key is implicitly opened
329 * when the RegQueryValueEx above is done. However, if
330 * it is not explicitly closed, it can cause disk
331 * partition manipulation problems.
332 */
333 RegCloseKey(HKEY_PERFORMANCE_DATA);
334 }
335 if (buf)
336 free(buf);
337 }
338#endif
339
340 if (advapi)
341 {
342 /*
343 * If it's available, then it's available in both ANSI
344 * and UNICODE flavors even in Win9x, documentation says.
345 * We favor Unicode...
346 */
347 acquire = (CRYPTACQUIRECONTEXTW) GetProcAddress(advapi,
348 "CryptAcquireContextW");
349 gen = (CRYPTGENRANDOM) GetProcAddress(advapi,
350 "CryptGenRandom");
351 release = (CRYPTRELEASECONTEXT) GetProcAddress(advapi,
352 "CryptReleaseContext");
353 }
354
355 if (acquire && gen && release)
356 {
357 /* poll the CryptoAPI PRNG */
358 /* The CryptoAPI returns sizeof(buf) bytes of randomness */
359 if (acquire(&hProvider, 0, 0, PROV_RSA_FULL,
360 CRYPT_VERIFYCONTEXT))
361 {
362 if (gen(hProvider, sizeof(buf), buf) != 0)
363 {
364 RAND_add(buf, sizeof(buf), 0);
365#if 0
366 printf("randomness from PROV_RSA_FULL\n");
367#endif
368 }
369 release(hProvider, 0);
370 }
371
372 /* poll the Pentium PRG with CryptoAPI */
373 if (acquire(&hProvider, 0, INTEL_DEF_PROV, PROV_INTEL_SEC, 0))
374 {
375 if (gen(hProvider, sizeof(buf), buf) != 0)
376 {
377 RAND_add(buf, sizeof(buf), sizeof(buf));
378#if 0
379 printf("randomness from PROV_INTEL_SEC\n");
380#endif
381 }
382 release(hProvider, 0);
383 }
384 }
385
386 if (advapi)
387 FreeLibrary(advapi);
388
389 if (user)
390 {
391 GETCURSORINFO cursor;
392 GETFOREGROUNDWINDOW win;
393 GETQUEUESTATUS queue;
394
395 win = (GETFOREGROUNDWINDOW) GetProcAddress(user, "GetForegroundWindow");
396 cursor = (GETCURSORINFO) GetProcAddress(user, "GetCursorInfo");
397 queue = (GETQUEUESTATUS) GetProcAddress(user, "GetQueueStatus");
398
399 if (win)
400 {
401 /* window handle */
402 h = win();
403 RAND_add(&h, sizeof(h), 0);
404 }
405 if (cursor)
406 {
407 /* unfortunately, its not safe to call GetCursorInfo()
408 * on NT4 even though it exists in SP3 (or SP6) and
409 * higher.
410 */
411 if ( osverinfo.dwPlatformId == VER_PLATFORM_WIN32_NT &&
412 osverinfo.dwMajorVersion < 5)
413 cursor = 0;
414 }
415 if (cursor)
416 {
417 /* cursor position */
418 /* assume 2 bytes of entropy */
419 CURSORINFO ci;
420 ci.cbSize = sizeof(CURSORINFO);
421 if (cursor(&ci))
422 RAND_add(&ci, ci.cbSize, 2);
423 }
424
425 if (queue)
426 {
427 /* message queue status */
428 /* assume 1 byte of entropy */
429 w = queue(QS_ALLEVENTS);
430 RAND_add(&w, sizeof(w), 1);
431 }
432
433 FreeLibrary(user);
434 }
435
436 /* Toolhelp32 snapshot: enumerate processes, threads, modules and heap
437 * http://msdn.microsoft.com/library/psdk/winbase/toolhelp_5pfd.htm
438 * (Win 9x and 2000 only, not available on NT)
439 *
440 * This seeding method was proposed in Peter Gutmann, Software
441 * Generation of Practically Strong Random Numbers,
442 * http://www.usenix.org/publications/library/proceedings/sec98/gutmann.html
443 * revised version at http://www.cryptoengines.com/~peter/06_random.pdf
444 * (The assignment of entropy estimates below is arbitrary, but based
445 * on Peter's analysis the full poll appears to be safe. Additional
446 * interactive seeding is encouraged.)
447 */
448
449 if (kernel)
450 {
451 CREATETOOLHELP32SNAPSHOT snap;
452 CLOSETOOLHELP32SNAPSHOT close_snap;
453 HANDLE handle;
454
455 HEAP32FIRST heap_first;
456 HEAP32NEXT heap_next;
457 HEAP32LIST heaplist_first, heaplist_next;
458 PROCESS32 process_first, process_next;
459 THREAD32 thread_first, thread_next;
460 MODULE32 module_first, module_next;
461
462 HEAPLIST32 hlist;
463 HEAPENTRY32 hentry;
464 PROCESSENTRY32 p;
465 THREADENTRY32 t;
466 MODULEENTRY32 m;
467
468 snap = (CREATETOOLHELP32SNAPSHOT)
469 GetProcAddress(kernel, "CreateToolhelp32Snapshot");
470 close_snap = (CLOSETOOLHELP32SNAPSHOT)
471 GetProcAddress(kernel, "CloseToolhelp32Snapshot");
472 heap_first = (HEAP32FIRST) GetProcAddress(kernel, "Heap32First");
473 heap_next = (HEAP32NEXT) GetProcAddress(kernel, "Heap32Next");
474 heaplist_first = (HEAP32LIST) GetProcAddress(kernel, "Heap32ListFirst");
475 heaplist_next = (HEAP32LIST) GetProcAddress(kernel, "Heap32ListNext");
476 process_first = (PROCESS32) GetProcAddress(kernel, "Process32First");
477 process_next = (PROCESS32) GetProcAddress(kernel, "Process32Next");
478 thread_first = (THREAD32) GetProcAddress(kernel, "Thread32First");
479 thread_next = (THREAD32) GetProcAddress(kernel, "Thread32Next");
480 module_first = (MODULE32) GetProcAddress(kernel, "Module32First");
481 module_next = (MODULE32) GetProcAddress(kernel, "Module32Next");
482
483 if (snap && heap_first && heap_next && heaplist_first &&
484 heaplist_next && process_first && process_next &&
485 thread_first && thread_next && module_first &&
486 module_next && (handle = snap(TH32CS_SNAPALL,0))
487 != INVALID_HANDLE_VALUE)
488 {
489 /* heap list and heap walking */
490 /* HEAPLIST32 contains 3 fields that will change with
491 * each entry. Consider each field a source of 1 byte
492 * of entropy.
493 * HEAPENTRY32 contains 5 fields that will change with
494 * each entry. Consider each field a source of 1 byte
495 * of entropy.
496 */
497 hlist.dwSize = sizeof(HEAPLIST32);
498 if (heaplist_first(handle, &hlist))
499 do
500 {
501 RAND_add(&hlist, hlist.dwSize, 3);
502 hentry.dwSize = sizeof(HEAPENTRY32);
503 if (heap_first(&hentry,
504 hlist.th32ProcessID,
505 hlist.th32HeapID))
506 {
507 int entrycnt = 80;
508 do
509 RAND_add(&hentry,
510 hentry.dwSize, 5);
511 while (heap_next(&hentry)
512 && --entrycnt > 0);
513 }
514 } while (heaplist_next(handle,
515 &hlist));
516
517 /* process walking */
518 /* PROCESSENTRY32 contains 9 fields that will change
519 * with each entry. Consider each field a source of
520 * 1 byte of entropy.
521 */
522 p.dwSize = sizeof(PROCESSENTRY32);
523 if (process_first(handle, &p))
524 do
525 RAND_add(&p, p.dwSize, 9);
526 while (process_next(handle, &p));
527
528 /* thread walking */
529 /* THREADENTRY32 contains 6 fields that will change
530 * with each entry. Consider each field a source of
531 * 1 byte of entropy.
532 */
533 t.dwSize = sizeof(THREADENTRY32);
534 if (thread_first(handle, &t))
535 do
536 RAND_add(&t, t.dwSize, 6);
537 while (thread_next(handle, &t));
538
539 /* module walking */
540 /* MODULEENTRY32 contains 9 fields that will change
541 * with each entry. Consider each field a source of
542 * 1 byte of entropy.
543 */
544 m.dwSize = sizeof(MODULEENTRY32);
545 if (module_first(handle, &m))
546 do
547 RAND_add(&m, m.dwSize, 9);
548 while (module_next(handle, &m));
549 if (close_snap)
550 close_snap(handle);
551 else
552 CloseHandle(handle);
553 }
554
555 FreeLibrary(kernel);
556 }
557#endif /* !OPENSSL_SYS_WINCE */
558
559 /* timer data */
560 readtimer();
561
562 /* memory usage statistics */
563 GlobalMemoryStatus(&m);
564 RAND_add(&m, sizeof(m), 1);
565
566 /* process ID */
567 w = GetCurrentProcessId();
568 RAND_add(&w, sizeof(w), 1);
569
570#if 0
571 printf("Exiting RAND_poll\n");
572#endif
573
574 return(1);
575}
576
577int RAND_event(UINT iMsg, WPARAM wParam, LPARAM lParam)
578 {
579 double add_entropy=0;
580
581 switch (iMsg)
582 {
583 case WM_KEYDOWN:
584 {
585 static WPARAM key;
586 if (key != wParam)
587 add_entropy = 0.05;
588 key = wParam;
589 }
590 break;
591 case WM_MOUSEMOVE:
592 {
593 static int lastx,lasty,lastdx,lastdy;
594 int x,y,dx,dy;
595
596 x=LOWORD(lParam);
597 y=HIWORD(lParam);
598 dx=lastx-x;
599 dy=lasty-y;
600 if (dx != 0 && dy != 0 && dx-lastdx != 0 && dy-lastdy != 0)
601 add_entropy=.2;
602 lastx=x, lasty=y;
603 lastdx=dx, lastdy=dy;
604 }
605 break;
606 }
607
608 readtimer();
609 RAND_add(&iMsg, sizeof(iMsg), add_entropy);
610 RAND_add(&wParam, sizeof(wParam), 0);
611 RAND_add(&lParam, sizeof(lParam), 0);
612
613 return (RAND_status());
614 }
615
616
617void RAND_screen(void) /* function available for backward compatibility */
618{
619 RAND_poll();
620 readscreen();
621}
622
623
624/* feed timing information to the PRNG */
625static void readtimer(void)
626{
627 DWORD w;
628 LARGE_INTEGER l;
629 static int have_perfc = 1;
630#if defined(_MSC_VER) && defined(_M_X86)
631 static int have_tsc = 1;
632 DWORD cyclecount;
633
634 if (have_tsc) {
635 __try {
636 __asm {
637 _emit 0x0f
638 _emit 0x31
639 mov cyclecount, eax
640 }
641 RAND_add(&cyclecount, sizeof(cyclecount), 1);
642 } __except(EXCEPTION_EXECUTE_HANDLER) {
643 have_tsc = 0;
644 }
645 }
646#else
647# define have_tsc 0
648#endif
649
650 if (have_perfc) {
651 if (QueryPerformanceCounter(&l) == 0)
652 have_perfc = 0;
653 else
654 RAND_add(&l, sizeof(l), 0);
655 }
656
657 if (!have_tsc && !have_perfc) {
658 w = GetTickCount();
659 RAND_add(&w, sizeof(w), 0);
660 }
661}
662
663/* feed screen contents to PRNG */
664/*****************************************************************************
665 *
666 * Created 960901 by Gertjan van Oosten, gertjan@West.NL, West Consulting B.V.
667 *
668 * Code adapted from
669 * <URL:http://support.microsoft.com/default.aspx?scid=kb;[LN];97193>;
670 * the original copyright message is:
671 *
672 * (C) Copyright Microsoft Corp. 1993. All rights reserved.
673 *
674 * You have a royalty-free right to use, modify, reproduce and
675 * distribute the Sample Files (and/or any modified version) in
676 * any way you find useful, provided that you agree that
677 * Microsoft has no warranty obligations or liability for any
678 * Sample Application Files which are modified.
679 */
680
681static void readscreen(void)
682{
683#if !defined(OPENSSL_SYS_WINCE) && !defined(OPENSSL_SYS_WIN32_CYGWIN)
684 HDC hScrDC; /* screen DC */
685 HDC hMemDC; /* memory DC */
686 HBITMAP hBitmap; /* handle for our bitmap */
687 HBITMAP hOldBitmap; /* handle for previous bitmap */
688 BITMAP bm; /* bitmap properties */
689 unsigned int size; /* size of bitmap */
690 char *bmbits; /* contents of bitmap */
691 int w; /* screen width */
692 int h; /* screen height */
693 int y; /* y-coordinate of screen lines to grab */
694 int n = 16; /* number of screen lines to grab at a time */
695
696 /* Create a screen DC and a memory DC compatible to screen DC */
697 hScrDC = CreateDC(TEXT("DISPLAY"), NULL, NULL, NULL);
698 hMemDC = CreateCompatibleDC(hScrDC);
699
700 /* Get screen resolution */
701 w = GetDeviceCaps(hScrDC, HORZRES);
702 h = GetDeviceCaps(hScrDC, VERTRES);
703
704 /* Create a bitmap compatible with the screen DC */
705 hBitmap = CreateCompatibleBitmap(hScrDC, w, n);
706
707 /* Select new bitmap into memory DC */
708 hOldBitmap = SelectObject(hMemDC, hBitmap);
709
710 /* Get bitmap properties */
711 GetObject(hBitmap, sizeof(BITMAP), (LPSTR)&bm);
712 size = (unsigned int)bm.bmWidthBytes * bm.bmHeight * bm.bmPlanes;
713
714 bmbits = OPENSSL_malloc(size);
715 if (bmbits) {
716 /* Now go through the whole screen, repeatedly grabbing n lines */
717 for (y = 0; y < h-n; y += n)
718 {
719 unsigned char md[MD_DIGEST_LENGTH];
720
721 /* Bitblt screen DC to memory DC */
722 BitBlt(hMemDC, 0, 0, w, n, hScrDC, 0, y, SRCCOPY);
723
724 /* Copy bitmap bits from memory DC to bmbits */
725 GetBitmapBits(hBitmap, size, bmbits);
726
727 /* Get the hash of the bitmap */
728 MD(bmbits,size,md);
729
730 /* Seed the random generator with the hash value */
731 RAND_add(md, MD_DIGEST_LENGTH, 0);
732 }
733
734 OPENSSL_free(bmbits);
735 }
736
737 /* Select old bitmap back into memory DC */
738 hBitmap = SelectObject(hMemDC, hOldBitmap);
739
740 /* Clean up */
741 DeleteObject(hBitmap);
742 DeleteDC(hMemDC);
743 DeleteDC(hScrDC);
744#endif /* !OPENSSL_SYS_WINCE */
745}
746
747#endif
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-04-26 21:04:04 +0000