| /* 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 |
| # include <wincrypt.h> |
| # include <tlhelp32.h> |
| |
| /* |
| * 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) |
| 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 */ |
| |
| 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); |
| } |
| |
| 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 |
