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).
115 #include <openssl/rand.h>
116 /* XXX There are probably other includes missing here ... */
119 #if !defined(USE_MD5_RAND) && !defined(USE_SHA1_RAND) && !defined(USE_MDC2_RAND) && !defined(USE_MD2_RAND)
120 #if !defined(NO_SHA) && !defined(NO_SHA1)
121 #define USE_SHA1_RAND
122 #elif !defined(NO_MD5)
124 #elif !defined(NO_MDC2) && !defined(NO_DES)
125 #define USE_MDC2_RAND
126 #elif !defined(NO_MD2)
129 #error No message digest algorithm available
133 #if defined(USE_MD5_RAND)
134 #include <openssl/md5.h>
135 #define MD_DIGEST_LENGTH MD5_DIGEST_LENGTH
136 #define MD(a,b,c) MD5(a,b,c)
137 #elif defined(USE_SHA1_RAND)
138 #include <openssl/sha.h>
139 #define MD_DIGEST_LENGTH SHA_DIGEST_LENGTH
140 #define MD(a,b,c) SHA1(a,b,c)
141 #elif defined(USE_MDC2_RAND)
142 #include <openssl/mdc2.h>
143 #define MD_DIGEST_LENGTH MDC2_DIGEST_LENGTH
144 #define MD(a,b,c) MDC2(a,b,c)
145 #elif defined(USE_MD2_RAND)
146 #include <openssl/md2.h>
147 #define MD_DIGEST_LENGTH MD2_DIGEST_LENGTH
148 #define MD(a,b,c) MD2(a,b,c)
152 int RAND_event(UINT iMsg, WPARAM wParam, LPARAM lParam)
154 double add_entropy=0;
169 static int lastx,lasty,lastdx,lastdy;
176 if (dx != 0 && dy != 0 && dx-lastdx != 0 && dy-lastdy != 0)
179 lastdx=dx, lastdy=dy;
185 RAND_add(&iMsg, sizeof(iMsg), add_entropy);
186 RAND_add(&wParam, sizeof(wParam), 0);
187 RAND_add(&lParam, sizeof(lParam), 0);
188 RAND_add(&t, sizeof(t), 0);
190 return (RAND_status());
194 /*****************************************************************************
195 * Initialisation function for the SSL random generator. Takes the contents
196 * of the screen as random seed.
198 * Created 960901 by Gertjan van Oosten, gertjan@West.NL, West Consulting B.V.
201 * <URL:http://www.microsoft.com/kb/developr/win_dk/q97193.htm>;
202 * the original copyright message is:
204 * (C) Copyright Microsoft Corp. 1993. All rights reserved.
206 * You have a royalty-free right to use, modify, reproduce and
207 * distribute the Sample Files (and/or any modified version) in
208 * any way you find useful, provided that you agree that
209 * Microsoft has no warranty obligations or liability for any
210 * Sample Application Files which are modified.
213 * I have modified the loading of bytes via RAND_seed() mechanism since
214 * the original would have been very very CPU intensive since RAND_seed()
215 * does an MD5 per 16 bytes of input. The cost to digest 16 bytes is the same
216 * as that to digest 56 bytes. So under the old system, a screen of
217 * 1024*768*256 would have been CPU cost of approximately 49,000 56 byte MD5
218 * digests or digesting 2.7 mbytes. What I have put in place would
219 * be 48 16k MD5 digests, or effectively 48*16+48 MD5 bytes or 816 kbytes
220 * or about 3.5 times as much.
223 void RAND_screen(void)
225 HDC hScrDC; /* screen DC */
226 HDC hMemDC; /* memory DC */
227 HBITMAP hBitmap; /* handle for our bitmap */
228 HBITMAP hOldBitmap; /* handle for previous bitmap */
229 BITMAP bm; /* bitmap properties */
230 unsigned int size; /* size of bitmap */
231 char *bmbits; /* contents of bitmap */
232 int w; /* screen width */
233 int h; /* screen height */
234 int y; /* y-coordinate of screen lines to grab */
235 int n = 16; /* number of screen lines to grab at a time */
237 /* Create a screen DC and a memory DC compatible to screen DC */
238 hScrDC = CreateDC("DISPLAY", NULL, NULL, NULL);
239 hMemDC = CreateCompatibleDC(hScrDC);
241 /* Get screen resolution */
242 w = GetDeviceCaps(hScrDC, HORZRES);
243 h = GetDeviceCaps(hScrDC, VERTRES);
245 /* Create a bitmap compatible with the screen DC */
246 hBitmap = CreateCompatibleBitmap(hScrDC, w, n);
248 /* Select new bitmap into memory DC */
249 hOldBitmap = SelectObject(hMemDC, hBitmap);
251 /* Get bitmap properties */
252 GetObject(hBitmap, sizeof(BITMAP), (LPSTR)&bm);
253 size = (unsigned int)bm.bmWidthBytes * bm.bmHeight * bm.bmPlanes;
255 bmbits = Malloc(size);
257 /* Now go through the whole screen, repeatedly grabbing n lines */
258 for (y = 0; y < h-n; y += n)
260 unsigned char md[MD_DIGEST_LENGTH];
262 /* Bitblt screen DC to memory DC */
263 BitBlt(hMemDC, 0, 0, w, n, hScrDC, 0, y, SRCCOPY);
265 /* Copy bitmap bits from memory DC to bmbits */
266 GetBitmapBits(hBitmap, size, bmbits);
268 /* Get the MD5 of the bitmap */
271 /* Seed the random generator with the MD5 digest */
272 RAND_seed(md, MD_DIGEST_LENGTH);
278 /* Select old bitmap back into memory DC */
279 hBitmap = SelectObject(hMemDC, hOldBitmap);
282 DeleteObject(hBitmap);
290 static void *dummy=&dummy;