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);
175 HCRYPTPROV hProvider = 0;
180 HMODULE advapi, kernel, user;
181 CRYPTACQUIRECONTEXT acquire;
183 CRYPTRELEASECONTEXT release;
185 /* load functions dynamically - not available on all systems */
186 advapi = GetModuleHandle("ADVAPI32.DLL");
187 kernel = GetModuleHandle("KERNEL32.DLL");
188 user = GetModuleHandle("USER32.DLL");
192 acquire = (CRYPTACQUIRECONTEXT) GetProcAddress(advapi,
193 "CryptAcquireContextA");
194 gen = (CRYPTGENRANDOM) GetProcAddress(advapi,
196 release = (CRYPTRELEASECONTEXT) GetProcAddress(advapi,
197 "CryptReleaseContext");
200 if (acquire && gen && release)
202 /* poll the CryptoAPI PRNG */
203 if (acquire(&hProvider, 0, 0, PROV_RSA_FULL,
204 CRYPT_VERIFYCONTEXT))
206 if (gen(hProvider, sizeof(buf), buf) != 0)
208 RAND_add(buf, sizeof(buf), 0);
210 printf("randomness from PROV_RSA_FULL\n");
213 release(hProvider, 0);
216 /* poll the Pentium PRG with CryptoAPI */
217 if (acquire(&hProvider, 0, INTEL_DEF_PROV, PROV_INTEL_SEC, 0))
219 if (gen(hProvider, sizeof(buf), buf) != 0)
221 RAND_add(buf, sizeof(buf), 0);
223 printf("randomness from PROV_INTEL_SEC\n");
226 release(hProvider, 0);
233 /* memory usage statistics */
234 GlobalMemoryStatus(&m);
235 RAND_add(&m, sizeof(m), 1);
238 w = GetCurrentProcessId();
239 RAND_add(&w, sizeof(w), 0);
243 GETCURSORINFO cursor;
244 GETFOREGROUNDWINDOW win;
246 win = (GETFOREGROUNDWINDOW) GetProcAddress(user, "GetForegroundWindow");
247 cursor = (GETCURSORINFO) GetProcAddress(user, "GetCursorInfo");
253 RAND_add(&h, sizeof(h), 0);
258 /* cursor position */
259 PCURSORINFO p = (PCURSORINFO) buf;
260 p->cbSize = sizeof(CURSORINFO);
262 RAND_add(p+sizeof(p->cbSize), p->cbSize-sizeof(p->cbSize), 0);
266 /* Toolhelp32 snapshot: enumerate processes, threads, modules and heap
267 * http://msdn.microsoft.com/library/psdk/winbase/toolhelp_5pfd.htm
268 * (Win 9x only, not available on NT)
270 * This seeding method was proposed in Peter Gutmann, Software
271 * Generation of Practically Strong Random Numbers,
272 * http://www.usenix.org/publications/library/proceedings/sec98/gutmann.html
273 * revised version at http://www.cryptoengines.com/~peter/06_random.pdf
274 * (The assignment of entropy estimates below is arbitrary, but based
275 * on Peter's analysis the full poll appears to be safe. Additional
276 * interactive seeding is encouraged.)
281 CREATETOOLHELP32SNAPSHOT snap;
284 HEAP32FIRST heap_first;
285 HEAP32NEXT heap_next;
286 HEAP32LIST heaplist_first, heaplist_next;
287 PROCESS32 process_first, process_next;
288 THREAD32 thread_first, thread_next;
289 MODULE32 module_first, module_next;
297 snap = (CREATETOOLHELP32SNAPSHOT)
298 GetProcAddress(kernel, "CreateToolhelp32Snapshot");
299 heap_first = (HEAP32FIRST) GetProcAddress(kernel, "Heap32First");
300 heap_next = (HEAP32NEXT) GetProcAddress(kernel, "Heap32Next");
301 heaplist_first = (HEAP32LIST) GetProcAddress(kernel, "Heap32ListFirst");
302 heaplist_next = (HEAP32LIST) GetProcAddress(kernel, "Heap32ListNext");
303 process_first = (PROCESS32) GetProcAddress(kernel, "Process32First");
304 process_next = (PROCESS32) GetProcAddress(kernel, "Process32Next");
305 thread_first = (THREAD32) GetProcAddress(kernel, "Thread32First");
306 thread_next = (THREAD32) GetProcAddress(kernel, "Thread32Next");
307 module_first = (MODULE32) GetProcAddress(kernel, "Module32First");
308 module_next = (MODULE32) GetProcAddress(kernel, "Module32Next");
310 if (snap && heap_first && heap_next && heaplist_first &&
311 heaplist_next && process_first && process_next &&
312 thread_first && thread_next && module_first &&
313 module_next && (handle = snap(TH32CS_SNAPALL,0))
316 /* heap list and heap walking */
317 hlist.dwSize = sizeof(HEAPLIST32);
318 if (heaplist_first(handle, &hlist))
321 RAND_add(&hlist, hlist.dwSize, 0);
322 hentry.dwSize = sizeof(HEAPENTRY32);
323 if (heap_first(&hentry,
331 while (heap_next(&hentry)
334 } while (heaplist_next(handle,
337 /* process walking */
338 p.dwSize = sizeof(PROCESSENTRY32);
339 if (process_first(handle, &p))
341 RAND_add(&p, p.dwSize, 0);
342 while (process_next(handle, &p));
345 t.dwSize = sizeof(THREADENTRY32);
346 if (thread_first(handle, &t))
348 RAND_add(&t, t.dwSize, 0);
349 while (thread_next(handle, &t));
352 m.dwSize = sizeof(MODULEENTRY32);
353 if (module_first(handle, &m))
355 RAND_add(&m, m.dwSize, 1);
356 while (module_next(handle, &m));
363 printf("Exiting RAND_poll\n");
369 int RAND_event(UINT iMsg, WPARAM wParam, LPARAM lParam)
371 double add_entropy=0;
385 static int lastx,lasty,lastdx,lastdy;
392 if (dx != 0 && dy != 0 && dx-lastdx != 0 && dy-lastdy != 0)
395 lastdx=dx, lastdy=dy;
401 RAND_add(&iMsg, sizeof(iMsg), add_entropy);
402 RAND_add(&wParam, sizeof(wParam), 0);
403 RAND_add(&lParam, sizeof(lParam), 0);
405 return (RAND_status());
409 void RAND_screen(void) /* function available for backward compatibility */
416 /* feed timing information to the PRNG */
417 static void readtimer(void)
421 static int have_perfc = 1;
423 static int have_tsc = 1;
431 RAND_add(&cyclecount, sizeof(cyclecount), 1);
432 } __except(EXCEPTION_EXECUTE_HANDLER) {
441 if (QueryPerformanceCounter(&l) == 0)
444 RAND_add(&l, sizeof(l), 0);
447 if (!have_tsc && !have_perfc) {
449 RAND_add(&w, sizeof(w), 0);
453 /* feed screen contents to PRNG */
454 /*****************************************************************************
456 * Created 960901 by Gertjan van Oosten, gertjan@West.NL, West Consulting B.V.
459 * <URL:http://www.microsoft.com/kb/developr/win_dk/q97193.htm>;
460 * the original copyright message is:
462 * (C) Copyright Microsoft Corp. 1993. All rights reserved.
464 * You have a royalty-free right to use, modify, reproduce and
465 * distribute the Sample Files (and/or any modified version) in
466 * any way you find useful, provided that you agree that
467 * Microsoft has no warranty obligations or liability for any
468 * Sample Application Files which are modified.
471 static void readscreen(void)
473 HDC hScrDC; /* screen DC */
474 HDC hMemDC; /* memory DC */
475 HBITMAP hBitmap; /* handle for our bitmap */
476 HBITMAP hOldBitmap; /* handle for previous bitmap */
477 BITMAP bm; /* bitmap properties */
478 unsigned int size; /* size of bitmap */
479 char *bmbits; /* contents of bitmap */
480 int w; /* screen width */
481 int h; /* screen height */
482 int y; /* y-coordinate of screen lines to grab */
483 int n = 16; /* number of screen lines to grab at a time */
485 /* Create a screen DC and a memory DC compatible to screen DC */
486 hScrDC = CreateDC("DISPLAY", NULL, NULL, NULL);
487 hMemDC = CreateCompatibleDC(hScrDC);
489 /* Get screen resolution */
490 w = GetDeviceCaps(hScrDC, HORZRES);
491 h = GetDeviceCaps(hScrDC, VERTRES);
493 /* Create a bitmap compatible with the screen DC */
494 hBitmap = CreateCompatibleBitmap(hScrDC, w, n);
496 /* Select new bitmap into memory DC */
497 hOldBitmap = SelectObject(hMemDC, hBitmap);
499 /* Get bitmap properties */
500 GetObject(hBitmap, sizeof(BITMAP), (LPSTR)&bm);
501 size = (unsigned int)bm.bmWidthBytes * bm.bmHeight * bm.bmPlanes;
503 bmbits = OPENSSL_malloc(size);
505 /* Now go through the whole screen, repeatedly grabbing n lines */
506 for (y = 0; y < h-n; y += n)
508 unsigned char md[MD_DIGEST_LENGTH];
510 /* Bitblt screen DC to memory DC */
511 BitBlt(hMemDC, 0, 0, w, n, hScrDC, 0, y, SRCCOPY);
513 /* Copy bitmap bits from memory DC to bmbits */
514 GetBitmapBits(hBitmap, size, bmbits);
516 /* Get the hash of the bitmap */
519 /* Seed the random generator with the hash value */
520 RAND_add(md, MD_DIGEST_LENGTH, 0);
523 OPENSSL_free(bmbits);
526 /* Select old bitmap back into memory DC */
527 hBitmap = SelectObject(hMemDC, hOldBitmap);
530 DeleteObject(hBitmap);
535 #else /* Unix version */
542 pid_t curr_pid = getpid();
548 /* Use a random entropy pool device. Linux, FreeBSD and OpenBSD
549 * have this. Use /dev/urandom if you can as /dev/random may block
550 * if it runs out of random entries. */
552 if ((fh = fopen(DEVRANDOM, "r")) != NULL)
554 unsigned char tmpbuf[ENTROPY_NEEDED];
557 setvbuf(fh, NULL, _IONBF, 0);
558 n=fread((unsigned char *)tmpbuf,1,ENTROPY_NEEDED,fh);
560 RAND_add(tmpbuf,sizeof tmpbuf,n);
565 /* put in some default random data, we need more than just this */
567 RAND_add(&l,sizeof(l),0);
569 RAND_add(&l,sizeof(l),0);
572 RAND_add(&l,sizeof(l),0);