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751 lines
29 KiB
751 lines
29 KiB
/* crypto/rand/rand_win.c */ |
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
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* All rights reserved. |
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* |
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* This package is an SSL implementation written |
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* by Eric Young (eay@cryptsoft.com). |
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* The implementation was written so as to conform with Netscapes SSL. |
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* |
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* This library is free for commercial and non-commercial use as long as |
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* the following conditions are aheared to. The following conditions |
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* apply to all code found in this distribution, be it the RC4, RSA, |
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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* included with this distribution is covered by the same copyright terms |
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* except that the holder is Tim Hudson (tjh@cryptsoft.com). |
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* |
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* Copyright remains Eric Young's, and as such any Copyright notices in |
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* the code are not to be removed. |
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* If this package is used in a product, Eric Young should be given attribution |
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* as the author of the parts of the library used. |
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* This can be in the form of a textual message at program startup or |
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* in documentation (online or textual) provided with the package. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* "This product includes cryptographic software written by |
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* Eric Young (eay@cryptsoft.com)" |
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* The word 'cryptographic' can be left out if the rouines from the library |
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* being used are not cryptographic related :-). |
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* 4. If you include any Windows specific code (or a derivative thereof) from |
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* the apps directory (application code) you must include an acknowledgement: |
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* The licence and distribution terms for any publically available version or |
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* derivative of this code cannot be changed. i.e. this code cannot simply be |
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* copied and put under another distribution licence |
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* [including the GNU Public Licence.] |
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*/ |
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/* ==================================================================== |
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* Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. All advertising materials mentioning features or use of this |
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* software must display the following acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
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* |
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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* endorse or promote products derived from this software without |
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* prior written permission. For written permission, please contact |
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* openssl-core@openssl.org. |
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* |
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* 5. Products derived from this software may not be called "OpenSSL" |
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* nor may "OpenSSL" appear in their names without prior written |
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* permission of the OpenSSL Project. |
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* |
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* 6. Redistributions of any form whatsoever must retain the following |
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* acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This product includes cryptographic software written by Eric Young |
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* (eay@cryptsoft.com). This product includes software written by Tim |
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* Hudson (tjh@cryptsoft.com). |
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* |
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*/ |
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|
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#include "cryptlib.h" |
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#include <openssl/rand.h> |
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#include "rand_lcl.h" |
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|
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#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) |
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# include <windows.h> |
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# ifndef _WIN32_WINNT |
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# define _WIN32_WINNT 0x0400 |
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# endif |
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# include <wincrypt.h> |
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# include <tlhelp32.h> |
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|
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/* |
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* Limit the time spent walking through the heap, processes, threads and |
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* modules to a maximum of 1000 miliseconds each, unless CryptoGenRandom |
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* failed |
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*/ |
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# define MAXDELAY 1000 |
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|
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/* |
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* Intel hardware RNG CSP -- available from |
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* http://developer.intel.com/design/security/rng/redist_license.htm |
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*/ |
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# define PROV_INTEL_SEC 22 |
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# define INTEL_DEF_PROV L"Intel Hardware Cryptographic Service Provider" |
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|
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static void readtimer(void); |
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static void readscreen(void); |
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|
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/* |
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* It appears like CURSORINFO, PCURSORINFO and LPCURSORINFO are only defined |
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* when WINVER is 0x0500 and up, which currently only happens on Win2000. |
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* Unfortunately, those are typedefs, so they're a little bit difficult to |
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* detect properly. On the other hand, the macro CURSOR_SHOWING is defined |
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* within the same conditional, so it can be use to detect the absence of |
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* said typedefs. |
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*/ |
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|
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# ifndef CURSOR_SHOWING |
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/* |
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* Information about the global cursor. |
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*/ |
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typedef struct tagCURSORINFO { |
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DWORD cbSize; |
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DWORD flags; |
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HCURSOR hCursor; |
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POINT ptScreenPos; |
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} CURSORINFO, *PCURSORINFO, *LPCURSORINFO; |
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|
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# define CURSOR_SHOWING 0x00000001 |
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# endif /* CURSOR_SHOWING */ |
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|
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# if !defined(OPENSSL_SYS_WINCE) |
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typedef BOOL(WINAPI *CRYPTACQUIRECONTEXTW) (HCRYPTPROV *, LPCWSTR, LPCWSTR, |
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DWORD, DWORD); |
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typedef BOOL(WINAPI *CRYPTGENRANDOM) (HCRYPTPROV, DWORD, BYTE *); |
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typedef BOOL(WINAPI *CRYPTRELEASECONTEXT) (HCRYPTPROV, DWORD); |
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|
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typedef HWND(WINAPI *GETFOREGROUNDWINDOW) (VOID); |
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typedef BOOL(WINAPI *GETCURSORINFO) (PCURSORINFO); |
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typedef DWORD(WINAPI *GETQUEUESTATUS) (UINT); |
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|
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typedef HANDLE(WINAPI *CREATETOOLHELP32SNAPSHOT) (DWORD, DWORD); |
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typedef BOOL(WINAPI *CLOSETOOLHELP32SNAPSHOT) (HANDLE); |
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typedef BOOL(WINAPI *HEAP32FIRST) (LPHEAPENTRY32, DWORD, size_t); |
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typedef BOOL(WINAPI *HEAP32NEXT) (LPHEAPENTRY32); |
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typedef BOOL(WINAPI *HEAP32LIST) (HANDLE, LPHEAPLIST32); |
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typedef BOOL(WINAPI *PROCESS32) (HANDLE, LPPROCESSENTRY32); |
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typedef BOOL(WINAPI *THREAD32) (HANDLE, LPTHREADENTRY32); |
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typedef BOOL(WINAPI *MODULE32) (HANDLE, LPMODULEENTRY32); |
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|
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# include <lmcons.h> |
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# include <lmstats.h> |
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# if 1 |
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/* |
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* The NET API is Unicode only. It requires the use of the UNICODE macro. |
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* When UNICODE is defined LPTSTR becomes LPWSTR. LMSTR was was added to the |
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* Platform SDK to allow the NET API to be used in non-Unicode applications |
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* provided that Unicode strings were still used for input. LMSTR is defined |
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* as LPWSTR. |
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*/ |
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typedef NET_API_STATUS(NET_API_FUNCTION *NETSTATGET) |
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(LPWSTR, LPWSTR, DWORD, DWORD, LPBYTE *); |
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typedef NET_API_STATUS(NET_API_FUNCTION *NETFREE) (LPBYTE); |
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# endif /* 1 */ |
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# endif /* !OPENSSL_SYS_WINCE */ |
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int RAND_poll(void) |
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{ |
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MEMORYSTATUS m; |
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HCRYPTPROV hProvider = 0; |
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DWORD w; |
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int good = 0; |
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|
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# if defined(OPENSSL_SYS_WINCE) |
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# if defined(_WIN32_WCE) && _WIN32_WCE>=300 |
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/* |
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* Even though MSDN says _WIN32_WCE>=210, it doesn't seem to be available |
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* in commonly available implementations prior 300... |
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*/ |
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{ |
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BYTE buf[64]; |
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/* poll the CryptoAPI PRNG */ |
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/* The CryptoAPI returns sizeof(buf) bytes of randomness */ |
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if (CryptAcquireContextW(&hProvider, NULL, NULL, PROV_RSA_FULL, |
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CRYPT_VERIFYCONTEXT)) { |
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if (CryptGenRandom(hProvider, sizeof(buf), buf)) |
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RAND_add(buf, sizeof(buf), sizeof(buf)); |
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CryptReleaseContext(hProvider, 0); |
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} |
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} |
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# endif |
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# else /* OPENSSL_SYS_WINCE */ |
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/* |
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* None of below libraries are present on Windows CE, which is |
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* why we #ifndef the whole section. This also excuses us from |
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* handling the GetProcAddress issue. The trouble is that in |
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* real Win32 API GetProcAddress is available in ANSI flavor |
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* only. In WinCE on the other hand GetProcAddress is a macro |
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* most commonly defined as GetProcAddressW, which accepts |
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* Unicode argument. If we were to call GetProcAddress under |
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* WinCE, I'd recommend to either redefine GetProcAddress as |
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* GetProcAddressA (there seem to be one in common CE spec) or |
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* implement own shim routine, which would accept ANSI argument |
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* and expand it to Unicode. |
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*/ |
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{ |
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/* load functions dynamically - not available on all systems */ |
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HMODULE advapi = LoadLibrary(TEXT("ADVAPI32.DLL")); |
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HMODULE kernel = LoadLibrary(TEXT("KERNEL32.DLL")); |
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HMODULE user = NULL; |
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HMODULE netapi = LoadLibrary(TEXT("NETAPI32.DLL")); |
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CRYPTACQUIRECONTEXTW acquire = NULL; |
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CRYPTGENRANDOM gen = NULL; |
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CRYPTRELEASECONTEXT release = NULL; |
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NETSTATGET netstatget = NULL; |
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NETFREE netfree = NULL; |
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BYTE buf[64]; |
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if (netapi) { |
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netstatget = |
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(NETSTATGET) GetProcAddress(netapi, "NetStatisticsGet"); |
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netfree = (NETFREE) GetProcAddress(netapi, "NetApiBufferFree"); |
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} |
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|
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if (netstatget && netfree) { |
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LPBYTE outbuf; |
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/* |
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* NetStatisticsGet() is a Unicode only function |
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* STAT_WORKSTATION_0 contains 45 fields and STAT_SERVER_0 |
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* contains 17 fields. We treat each field as a source of one |
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* byte of entropy. |
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*/ |
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|
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if (netstatget(NULL, L"LanmanWorkstation", 0, 0, &outbuf) == 0) { |
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RAND_add(outbuf, sizeof(STAT_WORKSTATION_0), 45); |
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netfree(outbuf); |
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} |
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if (netstatget(NULL, L"LanmanServer", 0, 0, &outbuf) == 0) { |
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RAND_add(outbuf, sizeof(STAT_SERVER_0), 17); |
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netfree(outbuf); |
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} |
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} |
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if (netapi) |
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FreeLibrary(netapi); |
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|
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/* |
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* It appears like this can cause an exception deep within |
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* ADVAPI32.DLL at random times on Windows 2000. Reported by Jeffrey |
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* Altman. Only use it on NT. |
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*/ |
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|
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if (advapi) { |
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/* |
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* If it's available, then it's available in both ANSI |
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* and UNICODE flavors even in Win9x, documentation says. |
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* We favor Unicode... |
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*/ |
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acquire = (CRYPTACQUIRECONTEXTW) GetProcAddress(advapi, |
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"CryptAcquireContextW"); |
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gen = (CRYPTGENRANDOM) GetProcAddress(advapi, "CryptGenRandom"); |
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release = (CRYPTRELEASECONTEXT) GetProcAddress(advapi, |
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"CryptReleaseContext"); |
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} |
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if (acquire && gen && release) { |
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/* poll the CryptoAPI PRNG */ |
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/* The CryptoAPI returns sizeof(buf) bytes of randomness */ |
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if (acquire(&hProvider, NULL, NULL, PROV_RSA_FULL, |
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CRYPT_VERIFYCONTEXT)) { |
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if (gen(hProvider, sizeof(buf), buf) != 0) { |
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RAND_add(buf, sizeof(buf), 0); |
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good = 1; |
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# if 0 |
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printf("randomness from PROV_RSA_FULL\n"); |
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# endif |
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} |
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release(hProvider, 0); |
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} |
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|
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/* poll the Pentium PRG with CryptoAPI */ |
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if (acquire(&hProvider, 0, INTEL_DEF_PROV, PROV_INTEL_SEC, 0)) { |
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if (gen(hProvider, sizeof(buf), buf) != 0) { |
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RAND_add(buf, sizeof(buf), sizeof(buf)); |
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good = 1; |
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# if 0 |
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printf("randomness from PROV_INTEL_SEC\n"); |
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# endif |
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} |
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release(hProvider, 0); |
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} |
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} |
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if (advapi) |
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FreeLibrary(advapi); |
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|
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if ((!check_winnt() || |
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!OPENSSL_isservice()) && |
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(user = LoadLibrary(TEXT("USER32.DLL")))) { |
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GETCURSORINFO cursor; |
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GETFOREGROUNDWINDOW win; |
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GETQUEUESTATUS queue; |
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|
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win = |
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(GETFOREGROUNDWINDOW) GetProcAddress(user, |
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"GetForegroundWindow"); |
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cursor = (GETCURSORINFO) GetProcAddress(user, "GetCursorInfo"); |
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queue = (GETQUEUESTATUS) GetProcAddress(user, "GetQueueStatus"); |
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|
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if (win) { |
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/* window handle */ |
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HWND h = win(); |
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RAND_add(&h, sizeof(h), 0); |
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} |
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if (cursor) { |
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/* |
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* unfortunately, its not safe to call GetCursorInfo() on NT4 |
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* even though it exists in SP3 (or SP6) and higher. |
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*/ |
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if (check_winnt() && !check_win_minplat(5)) |
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cursor = 0; |
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} |
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if (cursor) { |
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/* cursor position */ |
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/* assume 2 bytes of entropy */ |
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CURSORINFO ci; |
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ci.cbSize = sizeof(CURSORINFO); |
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if (cursor(&ci)) |
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RAND_add(&ci, ci.cbSize, 2); |
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} |
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|
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if (queue) { |
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/* message queue status */ |
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/* assume 1 byte of entropy */ |
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w = queue(QS_ALLEVENTS); |
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RAND_add(&w, sizeof(w), 1); |
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} |
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|
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FreeLibrary(user); |
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} |
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|
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/*- |
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* Toolhelp32 snapshot: enumerate processes, threads, modules and heap |
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* http://msdn.microsoft.com/library/psdk/winbase/toolhelp_5pfd.htm |
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* (Win 9x and 2000 only, not available on NT) |
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* |
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* This seeding method was proposed in Peter Gutmann, Software |
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* Generation of Practically Strong Random Numbers, |
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* http://www.usenix.org/publications/library/proceedings/sec98/gutmann.html |
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* revised version at http://www.cryptoengines.com/~peter/06_random.pdf |
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* (The assignment of entropy estimates below is arbitrary, but based |
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* on Peter's analysis the full poll appears to be safe. Additional |
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* interactive seeding is encouraged.) |
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*/ |
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|
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if (kernel) { |
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CREATETOOLHELP32SNAPSHOT snap; |
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CLOSETOOLHELP32SNAPSHOT close_snap; |
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HANDLE handle; |
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|
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HEAP32FIRST heap_first; |
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HEAP32NEXT heap_next; |
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HEAP32LIST heaplist_first, heaplist_next; |
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PROCESS32 process_first, process_next; |
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THREAD32 thread_first, thread_next; |
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MODULE32 module_first, module_next; |
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|
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HEAPLIST32 hlist; |
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HEAPENTRY32 hentry; |
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PROCESSENTRY32 p; |
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THREADENTRY32 t; |
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MODULEENTRY32 m; |
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DWORD starttime = 0; |
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|
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snap = (CREATETOOLHELP32SNAPSHOT) |
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GetProcAddress(kernel, "CreateToolhelp32Snapshot"); |
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close_snap = (CLOSETOOLHELP32SNAPSHOT) |
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GetProcAddress(kernel, "CloseToolhelp32Snapshot"); |
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heap_first = (HEAP32FIRST) GetProcAddress(kernel, "Heap32First"); |
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heap_next = (HEAP32NEXT) GetProcAddress(kernel, "Heap32Next"); |
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heaplist_first = |
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(HEAP32LIST) GetProcAddress(kernel, "Heap32ListFirst"); |
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heaplist_next = |
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(HEAP32LIST) GetProcAddress(kernel, "Heap32ListNext"); |
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process_first = |
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(PROCESS32) GetProcAddress(kernel, "Process32First"); |
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process_next = |
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(PROCESS32) GetProcAddress(kernel, "Process32Next"); |
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thread_first = (THREAD32) GetProcAddress(kernel, "Thread32First"); |
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thread_next = (THREAD32) GetProcAddress(kernel, "Thread32Next"); |
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module_first = (MODULE32) GetProcAddress(kernel, "Module32First"); |
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module_next = (MODULE32) GetProcAddress(kernel, "Module32Next"); |
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|
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if (snap && heap_first && heap_next && heaplist_first && |
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heaplist_next && process_first && process_next && |
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thread_first && thread_next && module_first && |
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module_next && (handle = snap(TH32CS_SNAPALL, 0)) |
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!= INVALID_HANDLE_VALUE) { |
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/* heap list and heap walking */ |
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/* |
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* HEAPLIST32 contains 3 fields that will change with each |
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* entry. Consider each field a source of 1 byte of entropy. |
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* HEAPENTRY32 contains 5 fields that will change with each |
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* entry. Consider each field a source of 1 byte of entropy. |
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*/ |
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ZeroMemory(&hlist, sizeof(HEAPLIST32)); |
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hlist.dwSize = sizeof(HEAPLIST32); |
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if (good) |
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starttime = GetTickCount(); |
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# ifdef _MSC_VER |
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if (heaplist_first(handle, &hlist)) { |
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/* |
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* following discussion on dev ML, exception on WinCE (or |
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* other Win platform) is theoretically of unknown |
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* origin; prevent infinite loop here when this |
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* theoretical case occurs; otherwise cope with the |
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* expected (MSDN documented) exception-throwing |
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* behaviour of Heap32Next() on WinCE. |
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* |
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* based on patch in original message by Tanguy Fautré |
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* (2009/03/02) Subject: RAND_poll() and |
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* CreateToolhelp32Snapshot() stability |
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*/ |
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int ex_cnt_limit = 42; |
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do { |
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RAND_add(&hlist, hlist.dwSize, 3); |
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__try { |
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ZeroMemory(&hentry, sizeof(HEAPENTRY32)); |
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hentry.dwSize = sizeof(HEAPENTRY32); |
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if (heap_first(&hentry, |
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hlist.th32ProcessID, |
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hlist.th32HeapID)) { |
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int entrycnt = 80; |
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do |
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RAND_add(&hentry, hentry.dwSize, 5); |
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while (heap_next(&hentry) |
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&& (!good |
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|| (GetTickCount() - starttime) < |
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MAXDELAY) |
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&& --entrycnt > 0); |
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} |
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} |
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__except(EXCEPTION_EXECUTE_HANDLER) { |
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/* |
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* ignore access violations when walking the heap |
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* list |
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*/ |
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ex_cnt_limit--; |
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} |
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} while (heaplist_next(handle, &hlist) |
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&& (!good |
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|| (GetTickCount() - starttime) < MAXDELAY) |
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&& ex_cnt_limit > 0); |
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} |
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# else |
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if (heaplist_first(handle, &hlist)) { |
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do { |
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RAND_add(&hlist, hlist.dwSize, 3); |
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hentry.dwSize = sizeof(HEAPENTRY32); |
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if (heap_first(&hentry, |
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hlist.th32ProcessID, |
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hlist.th32HeapID)) { |
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int entrycnt = 80; |
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do |
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RAND_add(&hentry, hentry.dwSize, 5); |
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while (heap_next(&hentry) |
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&& --entrycnt > 0); |
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} |
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} while (heaplist_next(handle, &hlist) |
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&& (!good |
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|| (GetTickCount() - starttime) < MAXDELAY)); |
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} |
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# endif |
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|
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/* process walking */ |
|
/* |
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* PROCESSENTRY32 contains 9 fields that will change with |
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* each entry. Consider each field a source of 1 byte of |
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* entropy. |
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*/ |
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p.dwSize = sizeof(PROCESSENTRY32); |
|
|
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if (good) |
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starttime = GetTickCount(); |
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if (process_first(handle, &p)) |
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do |
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RAND_add(&p, p.dwSize, 9); |
|
while (process_next(handle, &p) |
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&& (!good |
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|| (GetTickCount() - starttime) < MAXDELAY)); |
|
|
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/* thread walking */ |
|
/* |
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* THREADENTRY32 contains 6 fields that will change with each |
|
* entry. Consider each field a source of 1 byte of entropy. |
|
*/ |
|
t.dwSize = sizeof(THREADENTRY32); |
|
if (good) |
|
starttime = GetTickCount(); |
|
if (thread_first(handle, &t)) |
|
do |
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RAND_add(&t, t.dwSize, 6); |
|
while (thread_next(handle, &t) |
|
&& (!good |
|
|| (GetTickCount() - starttime) < MAXDELAY)); |
|
|
|
/* module walking */ |
|
/* |
|
* MODULEENTRY32 contains 9 fields that will change with each |
|
* entry. Consider each field a source of 1 byte of entropy. |
|
*/ |
|
m.dwSize = sizeof(MODULEENTRY32); |
|
if (good) |
|
starttime = GetTickCount(); |
|
if (module_first(handle, &m)) |
|
do |
|
RAND_add(&m, m.dwSize, 9); |
|
while (module_next(handle, &m) |
|
&& (!good |
|
|| (GetTickCount() - starttime) < MAXDELAY)); |
|
if (close_snap) |
|
close_snap(handle); |
|
else |
|
CloseHandle(handle); |
|
|
|
} |
|
|
|
FreeLibrary(kernel); |
|
} |
|
} |
|
# endif /* !OPENSSL_SYS_WINCE */ |
|
|
|
/* timer data */ |
|
readtimer(); |
|
|
|
/* memory usage statistics */ |
|
GlobalMemoryStatus(&m); |
|
RAND_add(&m, sizeof(m), 1); |
|
|
|
/* process ID */ |
|
w = GetCurrentProcessId(); |
|
RAND_add(&w, sizeof(w), 1); |
|
|
|
# if 0 |
|
printf("Exiting RAND_poll\n"); |
|
# endif |
|
|
|
return (1); |
|
} |
|
|
|
int RAND_event(UINT iMsg, WPARAM wParam, LPARAM lParam) |
|
{ |
|
double add_entropy = 0; |
|
|
|
switch (iMsg) { |
|
case WM_KEYDOWN: |
|
{ |
|
static WPARAM key; |
|
if (key != wParam) |
|
add_entropy = 0.05; |
|
key = wParam; |
|
} |
|
break; |
|
case WM_MOUSEMOVE: |
|
{ |
|
static int lastx, lasty, lastdx, lastdy; |
|
int x, y, dx, dy; |
|
|
|
x = LOWORD(lParam); |
|
y = HIWORD(lParam); |
|
dx = lastx - x; |
|
dy = lasty - y; |
|
if (dx != 0 && dy != 0 && dx - lastdx != 0 && dy - lastdy != 0) |
|
add_entropy = .2; |
|
lastx = x, lasty = y; |
|
lastdx = dx, lastdy = dy; |
|
} |
|
break; |
|
} |
|
|
|
readtimer(); |
|
RAND_add(&iMsg, sizeof(iMsg), add_entropy); |
|
RAND_add(&wParam, sizeof(wParam), 0); |
|
RAND_add(&lParam, sizeof(lParam), 0); |
|
|
|
return (RAND_status()); |
|
} |
|
|
|
void RAND_screen(void) |
|
{ /* function available for backward |
|
* compatibility */ |
|
RAND_poll(); |
|
readscreen(); |
|
} |
|
|
|
/* feed timing information to the PRNG */ |
|
static void readtimer(void) |
|
{ |
|
DWORD w; |
|
LARGE_INTEGER l; |
|
static int have_perfc = 1; |
|
# if defined(_MSC_VER) && defined(_M_X86) |
|
static int have_tsc = 1; |
|
DWORD cyclecount; |
|
|
|
if (have_tsc) { |
|
__try { |
|
__asm { |
|
_emit 0x0f _emit 0x31 mov cyclecount, eax} |
|
RAND_add(&cyclecount, sizeof(cyclecount), 1); |
|
} |
|
__except(EXCEPTION_EXECUTE_HANDLER) { |
|
have_tsc = 0; |
|
} |
|
} |
|
# else |
|
# define have_tsc 0 |
|
# endif |
|
|
|
if (have_perfc) { |
|
if (QueryPerformanceCounter(&l) == 0) |
|
have_perfc = 0; |
|
else |
|
RAND_add(&l, sizeof(l), 0); |
|
} |
|
|
|
if (!have_tsc && !have_perfc) { |
|
w = GetTickCount(); |
|
RAND_add(&w, sizeof(w), 0); |
|
} |
|
} |
|
|
|
/* feed screen contents to PRNG */ |
|
/***************************************************************************** |
|
* |
|
* Created 960901 by Gertjan van Oosten, gertjan@West.NL, West Consulting B.V. |
|
* |
|
* Code adapted from |
|
* <URL:http://support.microsoft.com/default.aspx?scid=kb;[LN];97193>; |
|
* the original copyright message is: |
|
* |
|
* (C) Copyright Microsoft Corp. 1993. All rights reserved. |
|
* |
|
* You have a royalty-free right to use, modify, reproduce and |
|
* distribute the Sample Files (and/or any modified version) in |
|
* any way you find useful, provided that you agree that |
|
* Microsoft has no warranty obligations or liability for any |
|
* Sample Application Files which are modified. |
|
*/ |
|
|
|
static void readscreen(void) |
|
{ |
|
# if !defined(OPENSSL_SYS_WINCE) && !defined(OPENSSL_SYS_WIN32_CYGWIN) |
|
HDC hScrDC; /* screen DC */ |
|
HDC hMemDC; /* memory DC */ |
|
HBITMAP hBitmap; /* handle for our bitmap */ |
|
HBITMAP hOldBitmap; /* handle for previous bitmap */ |
|
BITMAP bm; /* bitmap properties */ |
|
unsigned int size; /* size of bitmap */ |
|
char *bmbits; /* contents of bitmap */ |
|
int w; /* screen width */ |
|
int h; /* screen height */ |
|
int y; /* y-coordinate of screen lines to grab */ |
|
int n = 16; /* number of screen lines to grab at a time */ |
|
|
|
if (check_winnt() && OPENSSL_isservice() > 0) |
|
return; |
|
|
|
/* Create a screen DC and a memory DC compatible to screen DC */ |
|
hScrDC = CreateDC(TEXT("DISPLAY"), NULL, NULL, NULL); |
|
hMemDC = CreateCompatibleDC(hScrDC); |
|
|
|
/* Get screen resolution */ |
|
w = GetDeviceCaps(hScrDC, HORZRES); |
|
h = GetDeviceCaps(hScrDC, VERTRES); |
|
|
|
/* Create a bitmap compatible with the screen DC */ |
|
hBitmap = CreateCompatibleBitmap(hScrDC, w, n); |
|
|
|
/* Select new bitmap into memory DC */ |
|
hOldBitmap = SelectObject(hMemDC, hBitmap); |
|
|
|
/* Get bitmap properties */ |
|
GetObject(hBitmap, sizeof(BITMAP), (LPSTR) & bm); |
|
size = (unsigned int)bm.bmWidthBytes * bm.bmHeight * bm.bmPlanes; |
|
|
|
bmbits = OPENSSL_malloc(size); |
|
if (bmbits) { |
|
/* Now go through the whole screen, repeatedly grabbing n lines */ |
|
for (y = 0; y < h - n; y += n) { |
|
unsigned char md[MD_DIGEST_LENGTH]; |
|
|
|
/* Bitblt screen DC to memory DC */ |
|
BitBlt(hMemDC, 0, 0, w, n, hScrDC, 0, y, SRCCOPY); |
|
|
|
/* Copy bitmap bits from memory DC to bmbits */ |
|
GetBitmapBits(hBitmap, size, bmbits); |
|
|
|
/* Get the hash of the bitmap */ |
|
MD(bmbits, size, md); |
|
|
|
/* Seed the random generator with the hash value */ |
|
RAND_add(md, MD_DIGEST_LENGTH, 0); |
|
} |
|
|
|
OPENSSL_free(bmbits); |
|
} |
|
|
|
/* Select old bitmap back into memory DC */ |
|
hBitmap = SelectObject(hMemDC, hOldBitmap); |
|
|
|
/* Clean up */ |
|
DeleteObject(hBitmap); |
|
DeleteDC(hMemDC); |
|
DeleteDC(hScrDC); |
|
# endif /* !OPENSSL_SYS_WINCE */ |
|
} |
|
|
|
#endif
|
|
|