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Diffstat (limited to 'thirdparty/openssl/crypto/rand/rand_win.c')
| -rw-r--r-- | thirdparty/openssl/crypto/rand/rand_win.c | 757 |
1 files changed, 757 insertions, 0 deletions
diff --git a/thirdparty/openssl/crypto/rand/rand_win.c b/thirdparty/openssl/crypto/rand/rand_win.c new file mode 100644 index 0000000000..70fd52a7aa --- /dev/null +++ b/thirdparty/openssl/crypto/rand/rand_win.c @@ -0,0 +1,757 @@ +/* crypto/rand/rand_win.c */ +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ +/* ==================================================================== + * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@openssl.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.openssl.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + +#include "cryptlib.h" +#include <openssl/rand.h> +#include "rand_lcl.h" + +#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) +# include <windows.h> +# ifndef _WIN32_WINNT +# define _WIN32_WINNT 0x0400 +# endif +#ifndef WINRT_ENABLED +# include <wincrypt.h> +# include <tlhelp32.h> +#endif + +/* + * Limit the time spent walking through the heap, processes, threads and + * modules to a maximum of 1000 miliseconds each, unless CryptoGenRandom + * failed + */ +# define MAXDELAY 1000 + +/* + * Intel hardware RNG CSP -- available from + * http://developer.intel.com/design/security/rng/redist_license.htm + */ +# define PROV_INTEL_SEC 22 +# define INTEL_DEF_PROV L"Intel Hardware Cryptographic Service Provider" + +static void readtimer(void); +static void readscreen(void); + +/* + * It appears like CURSORINFO, PCURSORINFO and LPCURSORINFO are only defined + * when WINVER is 0x0500 and up, which currently only happens on Win2000. + * Unfortunately, those are typedefs, so they're a little bit difficult to + * detect properly. On the other hand, the macro CURSOR_SHOWING is defined + * within the same conditional, so it can be use to detect the absence of + * said typedefs. + */ + +# ifndef CURSOR_SHOWING +/* + * Information about the global cursor. + */ +typedef struct tagCURSORINFO { + DWORD cbSize; + DWORD flags; + HCURSOR hCursor; + POINT ptScreenPos; +} CURSORINFO, *PCURSORINFO, *LPCURSORINFO; + +# define CURSOR_SHOWING 0x00000001 +# endif /* CURSOR_SHOWING */ + +# if !defined(OPENSSL_SYS_WINCE) && !defined(WINRT_ENABLED) +typedef BOOL(WINAPI *CRYPTACQUIRECONTEXTW) (HCRYPTPROV *, LPCWSTR, LPCWSTR, + DWORD, DWORD); +typedef BOOL(WINAPI *CRYPTGENRANDOM) (HCRYPTPROV, DWORD, BYTE *); +typedef BOOL(WINAPI *CRYPTRELEASECONTEXT) (HCRYPTPROV, DWORD); + +typedef HWND(WINAPI *GETFOREGROUNDWINDOW) (VOID); +typedef BOOL(WINAPI *GETCURSORINFO) (PCURSORINFO); +typedef DWORD(WINAPI *GETQUEUESTATUS) (UINT); + +typedef HANDLE(WINAPI *CREATETOOLHELP32SNAPSHOT) (DWORD, DWORD); +typedef BOOL(WINAPI *CLOSETOOLHELP32SNAPSHOT) (HANDLE); +typedef BOOL(WINAPI *HEAP32FIRST) (LPHEAPENTRY32, DWORD, size_t); +typedef BOOL(WINAPI *HEAP32NEXT) (LPHEAPENTRY32); +typedef BOOL(WINAPI *HEAP32LIST) (HANDLE, LPHEAPLIST32); +typedef BOOL(WINAPI *PROCESS32) (HANDLE, LPPROCESSENTRY32); +typedef BOOL(WINAPI *THREAD32) (HANDLE, LPTHREADENTRY32); +typedef BOOL(WINAPI *MODULE32) (HANDLE, LPMODULEENTRY32); + +# include <lmcons.h> +# include <lmstats.h> +# if 1 +/* + * The NET API is Unicode only. It requires the use of the UNICODE macro. + * When UNICODE is defined LPTSTR becomes LPWSTR. LMSTR was was added to the + * Platform SDK to allow the NET API to be used in non-Unicode applications + * provided that Unicode strings were still used for input. LMSTR is defined + * as LPWSTR. + */ +typedef NET_API_STATUS(NET_API_FUNCTION *NETSTATGET) + (LPWSTR, LPWSTR, DWORD, DWORD, LPBYTE *); +typedef NET_API_STATUS(NET_API_FUNCTION *NETFREE) (LPBYTE); +# endif /* 1 */ +# endif /* !OPENSSL_SYS_WINCE */ + +#if !defined(WINRT_ENABLED) +int RAND_poll(void) +{ + MEMORYSTATUS m; + HCRYPTPROV hProvider = 0; + DWORD w; + int good = 0; + +# if defined(OPENSSL_SYS_WINCE) +# if defined(_WIN32_WCE) && _WIN32_WCE>=300 + /* + * Even though MSDN says _WIN32_WCE>=210, it doesn't seem to be available + * in commonly available implementations prior 300... + */ + { + BYTE buf[64]; + /* poll the CryptoAPI PRNG */ + /* The CryptoAPI returns sizeof(buf) bytes of randomness */ + if (CryptAcquireContextW(&hProvider, NULL, NULL, PROV_RSA_FULL, + CRYPT_VERIFYCONTEXT)) { + if (CryptGenRandom(hProvider, sizeof(buf), buf)) + RAND_add(buf, sizeof(buf), sizeof(buf)); + CryptReleaseContext(hProvider, 0); + } + } +# endif +# else /* OPENSSL_SYS_WINCE */ + /* + * None of below libraries are present on Windows CE, which is + * why we #ifndef the whole section. This also excuses us from + * handling the GetProcAddress issue. The trouble is that in + * real Win32 API GetProcAddress is available in ANSI flavor + * only. In WinCE on the other hand GetProcAddress is a macro + * most commonly defined as GetProcAddressW, which accepts + * Unicode argument. If we were to call GetProcAddress under + * WinCE, I'd recommend to either redefine GetProcAddress as + * GetProcAddressA (there seem to be one in common CE spec) or + * implement own shim routine, which would accept ANSI argument + * and expand it to Unicode. + */ + { + /* load functions dynamically - not available on all systems */ + HMODULE advapi = LoadLibrary(TEXT("ADVAPI32.DLL")); + HMODULE kernel = LoadLibrary(TEXT("KERNEL32.DLL")); + HMODULE user = NULL; + HMODULE netapi = LoadLibrary(TEXT("NETAPI32.DLL")); + CRYPTACQUIRECONTEXTW acquire = NULL; + CRYPTGENRANDOM gen = NULL; + CRYPTRELEASECONTEXT release = NULL; + NETSTATGET netstatget = NULL; + NETFREE netfree = NULL; + BYTE buf[64]; + + if (netapi) { + netstatget = + (NETSTATGET) GetProcAddress(netapi, "NetStatisticsGet"); + netfree = (NETFREE) GetProcAddress(netapi, "NetApiBufferFree"); + } + + if (netstatget && netfree) { + LPBYTE outbuf; + /* + * NetStatisticsGet() is a Unicode only function + * STAT_WORKSTATION_0 contains 45 fields and STAT_SERVER_0 + * contains 17 fields. We treat each field as a source of one + * byte of entropy. + */ + + if (netstatget(NULL, L"LanmanWorkstation", 0, 0, &outbuf) == 0) { + RAND_add(outbuf, sizeof(STAT_WORKSTATION_0), 45); + netfree(outbuf); + } + if (netstatget(NULL, L"LanmanServer", 0, 0, &outbuf) == 0) { + RAND_add(outbuf, sizeof(STAT_SERVER_0), 17); + netfree(outbuf); + } + } + + if (netapi) + FreeLibrary(netapi); + + /* + * It appears like this can cause an exception deep within + * ADVAPI32.DLL at random times on Windows 2000. Reported by Jeffrey + * Altman. Only use it on NT. + */ + + if (advapi) { + /* + * If it's available, then it's available in both ANSI + * and UNICODE flavors even in Win9x, documentation says. + * We favor Unicode... + */ + acquire = (CRYPTACQUIRECONTEXTW) GetProcAddress(advapi, + "CryptAcquireContextW"); + gen = (CRYPTGENRANDOM) GetProcAddress(advapi, "CryptGenRandom"); + release = (CRYPTRELEASECONTEXT) GetProcAddress(advapi, + "CryptReleaseContext"); + } + + if (acquire && gen && release) { + /* poll the CryptoAPI PRNG */ + /* The CryptoAPI returns sizeof(buf) bytes of randomness */ + if (acquire(&hProvider, NULL, NULL, PROV_RSA_FULL, + CRYPT_VERIFYCONTEXT)) { + if (gen(hProvider, sizeof(buf), buf) != 0) { + RAND_add(buf, sizeof(buf), 0); + good = 1; +# if 0 + printf("randomness from PROV_RSA_FULL\n"); +# endif + } + release(hProvider, 0); + } + + /* poll the Pentium PRG with CryptoAPI */ + if (acquire(&hProvider, 0, INTEL_DEF_PROV, PROV_INTEL_SEC, 0)) { + if (gen(hProvider, sizeof(buf), buf) != 0) { + RAND_add(buf, sizeof(buf), sizeof(buf)); + good = 1; +# if 0 + printf("randomness from PROV_INTEL_SEC\n"); +# endif + } + release(hProvider, 0); + } + } + + if (advapi) + FreeLibrary(advapi); + + if ((!check_winnt() || + !OPENSSL_isservice()) && + (user = LoadLibrary(TEXT("USER32.DLL")))) { + GETCURSORINFO cursor; + GETFOREGROUNDWINDOW win; + GETQUEUESTATUS queue; + + win = + (GETFOREGROUNDWINDOW) GetProcAddress(user, + "GetForegroundWindow"); + cursor = (GETCURSORINFO) GetProcAddress(user, "GetCursorInfo"); + queue = (GETQUEUESTATUS) GetProcAddress(user, "GetQueueStatus"); + + if (win) { + /* window handle */ + HWND h = win(); + RAND_add(&h, sizeof(h), 0); + } + if (cursor) { + /* + * unfortunately, its not safe to call GetCursorInfo() on NT4 + * even though it exists in SP3 (or SP6) and higher. + */ + if (check_winnt() && !check_win_minplat(5)) + cursor = 0; + } + if (cursor) { + /* cursor position */ + /* assume 2 bytes of entropy */ + CURSORINFO ci; + ci.cbSize = sizeof(CURSORINFO); + if (cursor(&ci)) + RAND_add(&ci, ci.cbSize, 2); + } + + if (queue) { + /* message queue status */ + /* assume 1 byte of entropy */ + w = queue(QS_ALLEVENTS); + RAND_add(&w, sizeof(w), 1); + } + + FreeLibrary(user); + } + + /*- + * Toolhelp32 snapshot: enumerate processes, threads, modules and heap + * http://msdn.microsoft.com/library/psdk/winbase/toolhelp_5pfd.htm + * (Win 9x and 2000 only, not available on NT) + * + * This seeding method was proposed in Peter Gutmann, Software + * Generation of Practically Strong Random Numbers, + * http://www.usenix.org/publications/library/proceedings/sec98/gutmann.html + * revised version at http://www.cryptoengines.com/~peter/06_random.pdf + * (The assignment of entropy estimates below is arbitrary, but based + * on Peter's analysis the full poll appears to be safe. Additional + * interactive seeding is encouraged.) + */ + + if (kernel) { + CREATETOOLHELP32SNAPSHOT snap; + CLOSETOOLHELP32SNAPSHOT close_snap; + HANDLE handle; + + HEAP32FIRST heap_first; + HEAP32NEXT heap_next; + HEAP32LIST heaplist_first, heaplist_next; + PROCESS32 process_first, process_next; + THREAD32 thread_first, thread_next; + MODULE32 module_first, module_next; + + HEAPLIST32 hlist; + HEAPENTRY32 hentry; + PROCESSENTRY32 p; + THREADENTRY32 t; + MODULEENTRY32 m; + DWORD starttime = 0; + + snap = (CREATETOOLHELP32SNAPSHOT) + GetProcAddress(kernel, "CreateToolhelp32Snapshot"); + close_snap = (CLOSETOOLHELP32SNAPSHOT) + GetProcAddress(kernel, "CloseToolhelp32Snapshot"); + heap_first = (HEAP32FIRST) GetProcAddress(kernel, "Heap32First"); + heap_next = (HEAP32NEXT) GetProcAddress(kernel, "Heap32Next"); + heaplist_first = + (HEAP32LIST) GetProcAddress(kernel, "Heap32ListFirst"); + heaplist_next = + (HEAP32LIST) GetProcAddress(kernel, "Heap32ListNext"); + process_first = + (PROCESS32) GetProcAddress(kernel, "Process32First"); + process_next = + (PROCESS32) GetProcAddress(kernel, "Process32Next"); + thread_first = (THREAD32) GetProcAddress(kernel, "Thread32First"); + thread_next = (THREAD32) GetProcAddress(kernel, "Thread32Next"); + module_first = (MODULE32) GetProcAddress(kernel, "Module32First"); + module_next = (MODULE32) GetProcAddress(kernel, "Module32Next"); + + if (snap && heap_first && heap_next && heaplist_first && + heaplist_next && process_first && process_next && + thread_first && thread_next && module_first && + module_next && (handle = snap(TH32CS_SNAPALL, 0)) + != INVALID_HANDLE_VALUE) { + /* heap list and heap walking */ + /* + * HEAPLIST32 contains 3 fields that will change with each + * entry. Consider each field a source of 1 byte of entropy. + * HEAPENTRY32 contains 5 fields that will change with each + * entry. Consider each field a source of 1 byte of entropy. + */ + ZeroMemory(&hlist, sizeof(HEAPLIST32)); + hlist.dwSize = sizeof(HEAPLIST32); + if (good) + starttime = GetTickCount(); +# ifdef _MSC_VER + if (heaplist_first(handle, &hlist)) { + /* + * following discussion on dev ML, exception on WinCE (or + * other Win platform) is theoretically of unknown + * origin; prevent infinite loop here when this + * theoretical case occurs; otherwise cope with the + * expected (MSDN documented) exception-throwing + * behaviour of Heap32Next() on WinCE. + * + * based on patch in original message by Tanguy Fautré + * (2009/03/02) Subject: RAND_poll() and + * CreateToolhelp32Snapshot() stability + */ + int ex_cnt_limit = 42; + do { + RAND_add(&hlist, hlist.dwSize, 3); + __try { + ZeroMemory(&hentry, sizeof(HEAPENTRY32)); + hentry.dwSize = sizeof(HEAPENTRY32); + if (heap_first(&hentry, + hlist.th32ProcessID, + hlist.th32HeapID)) { + int entrycnt = 80; + do + RAND_add(&hentry, hentry.dwSize, 5); + while (heap_next(&hentry) + && (!good + || (GetTickCount() - starttime) < + MAXDELAY) + && --entrycnt > 0); + } + } + __except(EXCEPTION_EXECUTE_HANDLER) { + /* + * ignore access violations when walking the heap + * list + */ + ex_cnt_limit--; + } + } while (heaplist_next(handle, &hlist) + && (!good + || (GetTickCount() - starttime) < MAXDELAY) + && ex_cnt_limit > 0); + } +# else + if (heaplist_first(handle, &hlist)) { + do { + RAND_add(&hlist, hlist.dwSize, 3); + hentry.dwSize = sizeof(HEAPENTRY32); + if (heap_first(&hentry, + hlist.th32ProcessID, + hlist.th32HeapID)) { + int entrycnt = 80; + do + RAND_add(&hentry, hentry.dwSize, 5); + while (heap_next(&hentry) + && --entrycnt > 0); + } + } while (heaplist_next(handle, &hlist) + && (!good + || (GetTickCount() - starttime) < MAXDELAY)); + } +# endif + + /* process walking */ + /* + * PROCESSENTRY32 contains 9 fields that will change with + * each entry. Consider each field a source of 1 byte of + * entropy. + */ + p.dwSize = sizeof(PROCESSENTRY32); + + if (good) + starttime = GetTickCount(); + if (process_first(handle, &p)) + do + RAND_add(&p, p.dwSize, 9); + while (process_next(handle, &p) + && (!good + || (GetTickCount() - starttime) < MAXDELAY)); + + /* thread walking */ + /* + * 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 + 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); +} + +#endif // WINRT_ENABLED + +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) && !defined(WINRT_ENABLED) + HDC hScrDC; /* screen DC */ + HBITMAP hBitmap; /* handle for our 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 */ + BITMAPINFOHEADER bi; /* info about the bitmap */ + + if (check_winnt() && OPENSSL_isservice() > 0) + return; + + /* Get a reference to the screen DC */ + hScrDC = GetDC(NULL); + + /* Get screen resolution */ + w = GetDeviceCaps(hScrDC, HORZRES); + h = GetDeviceCaps(hScrDC, VERTRES); + + /* Create a bitmap compatible with the screen DC */ + hBitmap = CreateCompatibleBitmap(hScrDC, w, n); + + /* Get bitmap properties */ + GetObject(hBitmap, sizeof(BITMAP), (LPSTR) & bm); + size = (unsigned int)bm.bmWidthBytes * bm.bmHeight * bm.bmPlanes; + + bi.biSize = sizeof(BITMAPINFOHEADER); + bi.biWidth = bm.bmWidth; + bi.biHeight = bm.bmHeight; + bi.biPlanes = bm.bmPlanes; + bi.biBitCount = bm.bmBitsPixel; + bi.biCompression = BI_RGB; + bi.biSizeImage = 0; + bi.biXPelsPerMeter = 0; + bi.biYPelsPerMeter = 0; + bi.biClrUsed = 0; + bi.biClrImportant = 0; + + 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]; + + /* Copy the bits of the current line range into the buffer */ + GetDIBits(hScrDC, hBitmap, y, n, + bmbits, (BITMAPINFO *) & bi, DIB_RGB_COLORS); + + /* 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); + } + + /* Clean up */ + DeleteObject(hBitmap); + ReleaseDC(NULL, hScrDC); +# endif /* !OPENSSL_SYS_WINCE */ +} + +#endif |