MEMORYSTATUS mst;
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");
- }
+ BYTE buf[64];
- 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;
- }
- 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;
- }
- 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);
+ /* 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) != 0) {
+ RAND_add(buf, sizeof(buf), sizeof(buf));
}
+ CryptReleaseContext(hProvider, 0);
+ }
- /*-
- * 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);
+ /* poll the Pentium PRG with CryptoAPI */
+ if (CryptAcquireContextW(&hProvider, NULL, INTEL_DEF_PROV, PROV_INTEL_SEC, CRYPT_VERIFYCONTEXT)) {
+ if (CryptGenRandom(hProvider, sizeof(buf), buf) != 0) {
+ RAND_add(buf, sizeof(buf), sizeof(buf));
}
+ CryptReleaseContext(hProvider, 0);
}
-# endif /* !OPENSSL_SYS_WINCE */
/* timer data */
readtimer();
projects / oweals / openssl.git / commitdiff