1 /* crypto/rand/rand_win.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
58 /* ====================================================================
59 * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 * ====================================================================
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).
112 #include "cryptlib.h"
113 #include <openssl/rand.h>
114 #include "rand_lcl.h"
116 #if defined(WINDOWS) || defined(WIN32)
119 # define _WIN32_WINNT 0x0400
121 #include <wincrypt.h>
122 #include <tlhelp32.h>
124 /* Intel hardware RNG CSP -- available from
125 * http://developer.intel.com/design/security/rng/redist_license.htm
127 #define PROV_INTEL_SEC 22
128 #define INTEL_DEF_PROV "Intel Hardware Cryptographic Service Provider"
130 static void readtimer(void);
131 static void readscreen(void);
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
140 #ifndef CURSOR_SHOWING
142 * Information about the global cursor.
144 typedef struct tagCURSORINFO
150 } CURSORINFO, *PCURSORINFO, *LPCURSORINFO;
152 #define CURSOR_SHOWING 0x00000001
153 #endif /* CURSOR_SHOWING */
155 typedef BOOL (WINAPI *CRYPTACQUIRECONTEXT)(HCRYPTPROV *, LPCTSTR, LPCTSTR,
157 typedef BOOL (WINAPI *CRYPTGENRANDOM)(HCRYPTPROV, DWORD, BYTE *);
158 typedef BOOL (WINAPI *CRYPTRELEASECONTEXT)(HCRYPTPROV, DWORD);
160 typedef HWND (WINAPI *GETFOREGROUNDWINDOW)(VOID);
161 typedef BOOL (WINAPI *GETCURSORINFO)(PCURSORINFO);
162 typedef DWORD (WINAPI *GETQUEUESTATUS)(UINT);
164 typedef HANDLE (WINAPI *CREATETOOLHELP32SNAPSHOT)(DWORD, DWORD);
165 typedef BOOL (WINAPI *HEAP32FIRST)(LPHEAPENTRY32, DWORD, DWORD);
166 typedef BOOL (WINAPI *HEAP32NEXT)(LPHEAPENTRY32);
167 typedef BOOL (WINAPI *HEAP32LIST)(HANDLE, LPHEAPLIST32);
168 typedef BOOL (WINAPI *PROCESS32)(HANDLE, LPPROCESSENTRY32);
169 typedef BOOL (WINAPI *THREAD32)(HANDLE, LPTHREADENTRY32);
170 typedef BOOL (WINAPI *MODULE32)(HANDLE, LPMODULEENTRY32);
174 typedef NET_API_STATUS (NET_API_FUNCTION * NETSTATGET)
175 (LMSTR, LMSTR, DWORD, DWORD, LPBYTE*);
176 typedef NET_API_STATUS (NET_API_FUNCTION * NETFREE)(LPBYTE);
181 HCRYPTPROV hProvider = 0;
186 HMODULE advapi, kernel, user, netapi;
187 CRYPTACQUIRECONTEXT acquire;
189 CRYPTRELEASECONTEXT release;
190 NETSTATGET netstatget;
193 /* load functions dynamically - not available on all systems */
194 advapi = GetModuleHandle("ADVAPI32.DLL");
195 kernel = GetModuleHandle("KERNEL32.DLL");
196 user = GetModuleHandle("USER32.DLL");
197 netapi = GetModuleHandle("NETAPI32.DLL");
201 netstatget = (NETSTATGET) GetProcAddress(netapi,"NetStatisticsGet");
202 netfree = (NETFREE) GetProcAddress(netapi,"NetApiBufferFree");
205 if (netstatget && netfree)
208 /* NetStatisticsGet() is a Unicode only function */
209 if (netstatget(NULL, L"LanmanWorkstation", 0, 0, &outbuf) == 0)
211 RAND_add(outbuf, sizeof(STAT_WORKSTATION_0), 0);
214 if (netstatget(NULL, L"LanmanServer", 0, 0, &outbuf) == 0)
216 RAND_add(outbuf, sizeof(STAT_SERVER_0), 0);
221 /* Read Performance Statistics from NT/2000 registry */
222 /* The size of the performance data can vary from call to call */
223 /* so we must guess the size of the buffer to use and increase */
224 /* its size if we get an ERROR_MORE_DATA return instead of */
227 LONG rc=ERROR_MORE_DATA;
232 while (rc == ERROR_MORE_DATA)
234 buf = realloc(buf,bufsz+8192);
240 rc = RegQueryValueEx(HKEY_PERFORMANCE_DATA, "Global",
241 NULL, NULL, buf, &length);
243 if (rc == ERROR_SUCCESS)
245 RAND_add(&length, sizeof(length), 0);
246 RAND_add(buf, length, 0);
254 acquire = (CRYPTACQUIRECONTEXT) GetProcAddress(advapi,
255 "CryptAcquireContextA");
256 gen = (CRYPTGENRANDOM) GetProcAddress(advapi,
258 release = (CRYPTRELEASECONTEXT) GetProcAddress(advapi,
259 "CryptReleaseContext");
262 if (acquire && gen && release)
264 /* poll the CryptoAPI PRNG */
265 if (acquire(&hProvider, 0, 0, PROV_RSA_FULL,
266 CRYPT_VERIFYCONTEXT))
268 if (gen(hProvider, sizeof(buf), buf) != 0)
270 RAND_add(buf, sizeof(buf), 0);
272 printf("randomness from PROV_RSA_FULL\n");
275 release(hProvider, 0);
278 /* poll the Pentium PRG with CryptoAPI */
279 if (acquire(&hProvider, 0, INTEL_DEF_PROV, PROV_INTEL_SEC, 0))
281 if (gen(hProvider, sizeof(buf), buf) != 0)
283 RAND_add(buf, sizeof(buf), 0);
285 printf("randomness from PROV_INTEL_SEC\n");
288 release(hProvider, 0);
295 /* memory usage statistics */
296 GlobalMemoryStatus(&m);
297 RAND_add(&m, sizeof(m), 1);
300 w = GetCurrentProcessId();
301 RAND_add(&w, sizeof(w), 0);
305 GETCURSORINFO cursor;
306 GETFOREGROUNDWINDOW win;
307 GETQUEUESTATUS queue;
309 win = (GETFOREGROUNDWINDOW) GetProcAddress(user, "GetForegroundWindow");
310 cursor = (GETCURSORINFO) GetProcAddress(user, "GetCursorInfo");
311 queue = (GETQUEUESTATUS) GetProcAddress(user, "GetQueueStatus");
317 RAND_add(&h, sizeof(h), 0);
322 /* unfortunately, its not safe to call GetCursorInfo()
323 * on NT4 even though it exists in SP3 (or SP6) and
326 OSVERSIONINFO osverinfo ;
327 osverinfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO) ;
328 GetVersionEx( &osverinfo ) ;
330 if ( osverinfo.dwPlatformId == VER_PLATFORM_WIN32_NT &&
331 osverinfo.dwMajorVersion < 5)
337 /* cursor position */
339 ci.cbSize = sizeof(CURSORINFO);
341 RAND_add(&ci, ci.cbSize, 0);
346 /* message queue status */
347 w = queue(QS_ALLEVENTS);
348 RAND_add(&w, sizeof(w), 0);
352 /* Toolhelp32 snapshot: enumerate processes, threads, modules and heap
353 * http://msdn.microsoft.com/library/psdk/winbase/toolhelp_5pfd.htm
354 * (Win 9x and 2000 only, not available on NT)
356 * This seeding method was proposed in Peter Gutmann, Software
357 * Generation of Practically Strong Random Numbers,
358 * http://www.usenix.org/publications/library/proceedings/sec98/gutmann.html
359 * revised version at http://www.cryptoengines.com/~peter/06_random.pdf
360 * (The assignment of entropy estimates below is arbitrary, but based
361 * on Peter's analysis the full poll appears to be safe. Additional
362 * interactive seeding is encouraged.)
367 CREATETOOLHELP32SNAPSHOT snap;
370 HEAP32FIRST heap_first;
371 HEAP32NEXT heap_next;
372 HEAP32LIST heaplist_first, heaplist_next;
373 PROCESS32 process_first, process_next;
374 THREAD32 thread_first, thread_next;
375 MODULE32 module_first, module_next;
383 snap = (CREATETOOLHELP32SNAPSHOT)
384 GetProcAddress(kernel, "CreateToolhelp32Snapshot");
385 heap_first = (HEAP32FIRST) GetProcAddress(kernel, "Heap32First");
386 heap_next = (HEAP32NEXT) GetProcAddress(kernel, "Heap32Next");
387 heaplist_first = (HEAP32LIST) GetProcAddress(kernel, "Heap32ListFirst");
388 heaplist_next = (HEAP32LIST) GetProcAddress(kernel, "Heap32ListNext");
389 process_first = (PROCESS32) GetProcAddress(kernel, "Process32First");
390 process_next = (PROCESS32) GetProcAddress(kernel, "Process32Next");
391 thread_first = (THREAD32) GetProcAddress(kernel, "Thread32First");
392 thread_next = (THREAD32) GetProcAddress(kernel, "Thread32Next");
393 module_first = (MODULE32) GetProcAddress(kernel, "Module32First");
394 module_next = (MODULE32) GetProcAddress(kernel, "Module32Next");
396 if (snap && heap_first && heap_next && heaplist_first &&
397 heaplist_next && process_first && process_next &&
398 thread_first && thread_next && module_first &&
399 module_next && (handle = snap(TH32CS_SNAPALL,0))
402 /* heap list and heap walking */
403 hlist.dwSize = sizeof(HEAPLIST32);
404 if (heaplist_first(handle, &hlist))
407 RAND_add(&hlist, hlist.dwSize, 0);
408 hentry.dwSize = sizeof(HEAPENTRY32);
409 if (heap_first(&hentry,
417 while (heap_next(&hentry)
420 } while (heaplist_next(handle,
423 /* process walking */
424 p.dwSize = sizeof(PROCESSENTRY32);
425 if (process_first(handle, &p))
427 RAND_add(&p, p.dwSize, 0);
428 while (process_next(handle, &p));
431 t.dwSize = sizeof(THREADENTRY32);
432 if (thread_first(handle, &t))
434 RAND_add(&t, t.dwSize, 0);
435 while (thread_next(handle, &t));
438 m.dwSize = sizeof(MODULEENTRY32);
439 if (module_first(handle, &m))
441 RAND_add(&m, m.dwSize, 1);
442 while (module_next(handle, &m));
449 printf("Exiting RAND_poll\n");
455 int RAND_event(UINT iMsg, WPARAM wParam, LPARAM lParam)
457 double add_entropy=0;
471 static int lastx,lasty,lastdx,lastdy;
478 if (dx != 0 && dy != 0 && dx-lastdx != 0 && dy-lastdy != 0)
481 lastdx=dx, lastdy=dy;
487 RAND_add(&iMsg, sizeof(iMsg), add_entropy);
488 RAND_add(&wParam, sizeof(wParam), 0);
489 RAND_add(&lParam, sizeof(lParam), 0);
491 return (RAND_status());
495 void RAND_screen(void) /* function available for backward compatibility */
502 /* feed timing information to the PRNG */
503 static void readtimer(void)
507 static int have_perfc = 1;
509 static int have_tsc = 1;
517 RAND_add(&cyclecount, sizeof(cyclecount), 1);
518 } __except(EXCEPTION_EXECUTE_HANDLER) {
527 if (QueryPerformanceCounter(&l) == 0)
530 RAND_add(&l, sizeof(l), 0);
533 if (!have_tsc && !have_perfc) {
535 RAND_add(&w, sizeof(w), 0);
539 /* feed screen contents to PRNG */
540 /*****************************************************************************
542 * Created 960901 by Gertjan van Oosten, gertjan@West.NL, West Consulting B.V.
545 * <URL:http://www.microsoft.com/kb/developr/win_dk/q97193.htm>;
546 * the original copyright message is:
548 * (C) Copyright Microsoft Corp. 1993. All rights reserved.
550 * You have a royalty-free right to use, modify, reproduce and
551 * distribute the Sample Files (and/or any modified version) in
552 * any way you find useful, provided that you agree that
553 * Microsoft has no warranty obligations or liability for any
554 * Sample Application Files which are modified.
557 static void readscreen(void)
559 HDC hScrDC; /* screen DC */
560 HDC hMemDC; /* memory DC */
561 HBITMAP hBitmap; /* handle for our bitmap */
562 HBITMAP hOldBitmap; /* handle for previous bitmap */
563 BITMAP bm; /* bitmap properties */
564 unsigned int size; /* size of bitmap */
565 char *bmbits; /* contents of bitmap */
566 int w; /* screen width */
567 int h; /* screen height */
568 int y; /* y-coordinate of screen lines to grab */
569 int n = 16; /* number of screen lines to grab at a time */
571 /* Create a screen DC and a memory DC compatible to screen DC */
572 hScrDC = CreateDC("DISPLAY", NULL, NULL, NULL);
573 hMemDC = CreateCompatibleDC(hScrDC);
575 /* Get screen resolution */
576 w = GetDeviceCaps(hScrDC, HORZRES);
577 h = GetDeviceCaps(hScrDC, VERTRES);
579 /* Create a bitmap compatible with the screen DC */
580 hBitmap = CreateCompatibleBitmap(hScrDC, w, n);
582 /* Select new bitmap into memory DC */
583 hOldBitmap = SelectObject(hMemDC, hBitmap);
585 /* Get bitmap properties */
586 GetObject(hBitmap, sizeof(BITMAP), (LPSTR)&bm);
587 size = (unsigned int)bm.bmWidthBytes * bm.bmHeight * bm.bmPlanes;
589 bmbits = OPENSSL_malloc(size);
591 /* Now go through the whole screen, repeatedly grabbing n lines */
592 for (y = 0; y < h-n; y += n)
594 unsigned char md[MD_DIGEST_LENGTH];
596 /* Bitblt screen DC to memory DC */
597 BitBlt(hMemDC, 0, 0, w, n, hScrDC, 0, y, SRCCOPY);
599 /* Copy bitmap bits from memory DC to bmbits */
600 GetBitmapBits(hBitmap, size, bmbits);
602 /* Get the hash of the bitmap */
605 /* Seed the random generator with the hash value */
606 RAND_add(md, MD_DIGEST_LENGTH, 0);
609 OPENSSL_free(bmbits);
612 /* Select old bitmap back into memory DC */
613 hBitmap = SelectObject(hMemDC, hOldBitmap);
616 DeleteObject(hBitmap);
621 #else /* Unix version */
628 pid_t curr_pid = getpid();
634 /* Use a random entropy pool device. Linux, FreeBSD and OpenBSD
635 * have this. Use /dev/urandom if you can as /dev/random may block
636 * if it runs out of random entries. */
638 if ((fh = fopen(DEVRANDOM, "r")) != NULL)
640 unsigned char tmpbuf[ENTROPY_NEEDED];
643 setvbuf(fh, NULL, _IONBF, 0);
644 n=fread((unsigned char *)tmpbuf,1,ENTROPY_NEEDED,fh);
646 RAND_add(tmpbuf,sizeof tmpbuf,n);
651 /* put in some default random data, we need more than just this */
653 RAND_add(&l,sizeof(l),0);
655 RAND_add(&l,sizeof(l),0);
658 RAND_add(&l,sizeof(l),0);