-/* 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).
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
*
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
-#include "cryptlib.h"
+#include "internal/cryptlib.h"
#include <openssl/rand.h>
#include "rand_lcl.h"
-#if defined(WINDOWS) || defined(WIN32)
-#include <windows.h>
-#ifndef _WIN32_WINNT
-# define _WIN32_WINNT 0x0400
-#endif
-#include <wincrypt.h>
-#include <tlhelp32.h>
-
-/* Intel hardware RNG CSP -- available from
+#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
+# include <windows.h>
+/* On Windows 7 or higher use BCrypt instead of the legacy CryptoAPI */
+# if defined(_MSC_VER) && defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0601
+# define RAND_WINDOWS_USE_BCRYPT
+# endif
+
+# ifdef RAND_WINDOWS_USE_BCRYPT
+# include <bcrypt.h>
+# pragma comment(lib, "bcrypt.lib")
+# ifndef STATUS_SUCCESS
+# define STATUS_SUCCESS ((NTSTATUS)0x00000000L)
+# endif
+# else
+# include <wincrypt.h>
+/*
+ * 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 "Intel Hardware Cryptographic Service Provider"
+# define PROV_INTEL_SEC 22
+# define INTEL_DEF_PROV L"Intel Hardware Cryptographic Service Provider"
+# endif
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 */
-
-typedef BOOL (WINAPI *CRYPTACQUIRECONTEXT)(HCRYPTPROV *, LPCTSTR, LPCTSTR,
- 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 *HEAP32FIRST)(LPHEAPENTRY32, DWORD, DWORD);
-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);
int RAND_poll(void)
{
- MEMORYSTATUS m;
- HCRYPTPROV hProvider = 0;
- BYTE buf[64];
- DWORD w;
- HWND h;
-
- HMODULE advapi, kernel, user;
- CRYPTACQUIRECONTEXT acquire;
- CRYPTGENRANDOM gen;
- CRYPTRELEASECONTEXT release;
-
- /* load functions dynamically - not available on all systems */
- advapi = GetModuleHandle("ADVAPI32.DLL");
- kernel = GetModuleHandle("KERNEL32.DLL");
- user = GetModuleHandle("USER32.DLL");
-
- if (advapi)
- {
- acquire = (CRYPTACQUIRECONTEXT) GetProcAddress(advapi,
- "CryptAcquireContextA");
- gen = (CRYPTGENRANDOM) GetProcAddress(advapi,
- "CryptGenRandom");
- release = (CRYPTRELEASECONTEXT) GetProcAddress(advapi,
- "CryptReleaseContext");
- }
-
- if (acquire && gen && release)
- {
- /* poll the CryptoAPI PRNG */
- if (acquire(&hProvider, 0, 0, PROV_RSA_FULL,
- CRYPT_VERIFYCONTEXT))
- {
- if (gen(hProvider, sizeof(buf), buf) != 0)
- {
- RAND_add(buf, sizeof(buf), 0);
-#ifdef DEBUG
- 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), 0);
-#ifdef DEBUG
- printf("randomness from PROV_INTEL_SEC\n");
-#endif
- }
- release(hProvider, 0);
- }
- }
-
- /* timer data */
- readtimer();
-
- /* memory usage statistics */
- GlobalMemoryStatus(&m);
- RAND_add(&m, sizeof(m), 1);
-
- /* process ID */
- w = GetCurrentProcessId();
- RAND_add(&w, sizeof(w), 0);
-
- if (user)
- {
- GETCURSORINFO cursor;
- GETFOREGROUNDWINDOW win;
-
- win = (GETFOREGROUNDWINDOW) GetProcAddress(user, "GetForegroundWindow");
- cursor = (GETCURSORINFO) GetProcAddress(user, "GetCursorInfo");
-
- if (win)
- {
- /* window handle */
- h = win();
- RAND_add(&h, sizeof(h), 0);
- }
-
- if (cursor)
- {
- /* cursor position */
- PCURSORINFO p = (PCURSORINFO) buf;
- p->cbSize = sizeof(CURSORINFO);
- if (cursor(p))
- RAND_add(p+sizeof(p->cbSize), p->cbSize-sizeof(p->cbSize), 0);
- }
- }
-
- /* Toolhelp32 snapshot: enumerate processes, threads, modules and heap
- * http://msdn.microsoft.com/library/psdk/winbase/toolhelp_5pfd.htm
- * (Win 9x 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;
- 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;
-
- snap = (CREATETOOLHELP32SNAPSHOT)
- GetProcAddress(kernel, "CreateToolhelp32Snapshot");
- 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))
- != NULL)
- {
- /* heap list and heap walking */
- hlist.dwSize = sizeof(HEAPLIST32);
- if (heaplist_first(handle, &hlist))
- do
- {
- RAND_add(&hlist, hlist.dwSize, 0);
- hentry.dwSize = sizeof(HEAPENTRY32);
- if (heap_first(&hentry,
- hlist.th32ProcessID,
- hlist.th32HeapID))
- {
- int entrycnt = 50;
- do
- RAND_add(&hentry,
- hentry.dwSize, 0);
- while (heap_next(&hentry)
- && --entrycnt > 0);
- }
- } while (heaplist_next(handle,
- &hlist));
-
- /* process walking */
- p.dwSize = sizeof(PROCESSENTRY32);
- if (process_first(handle, &p))
- do
- RAND_add(&p, p.dwSize, 0);
- while (process_next(handle, &p));
-
- /* thread walking */
- t.dwSize = sizeof(THREADENTRY32);
- if (thread_first(handle, &t))
- do
- RAND_add(&t, t.dwSize, 0);
- while (thread_next(handle, &t));
-
- /* module walking */
- m.dwSize = sizeof(MODULEENTRY32);
- if (module_first(handle, &m))
- do
- RAND_add(&m, m.dwSize, 1);
- while (module_next(handle, &m));
-
- CloseHandle(handle);
- }
- }
-
-#ifdef DEBUG
- printf("Exiting RAND_poll\n");
-#endif
-
- return(1);
+ MEMORYSTATUS mst;
+# ifndef RAND_WINDOWS_USE_BCRYPT
+ HCRYPTPROV hProvider;
+# endif
+ DWORD w;
+ BYTE buf[64];
+
+# ifdef RAND_WINDOWS_USE_BCRYPT
+ if (BCryptGenRandom(NULL, buf, (ULONG)sizeof(buf), BCRYPT_USE_SYSTEM_PREFERRED_RNG) == STATUS_SUCCESS) {
+ RAND_add(buf, sizeof(buf), sizeof(buf));
+ }
+# else
+ /* poll the CryptoAPI PRNG */
+ /* The CryptoAPI returns sizeof(buf) bytes of randomness */
+ if (CryptAcquireContextW(&hProvider, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT | CRYPT_SILENT)) {
+ if (CryptGenRandom(hProvider, (DWORD)sizeof(buf), buf) != 0) {
+ RAND_add(buf, sizeof(buf), sizeof(buf));
+ }
+ CryptReleaseContext(hProvider, 0);
+ }
+
+ /* poll the Pentium PRG with CryptoAPI */
+ if (CryptAcquireContextW(&hProvider, NULL, INTEL_DEF_PROV, PROV_INTEL_SEC, CRYPT_VERIFYCONTEXT | CRYPT_SILENT)) {
+ if (CryptGenRandom(hProvider, (DWORD)sizeof(buf), buf) != 0) {
+ RAND_add(buf, sizeof(buf), sizeof(buf));
+ }
+ CryptReleaseContext(hProvider, 0);
+ }
+# endif
+
+ /* timer data */
+ readtimer();
+
+ /* memory usage statistics */
+ GlobalMemoryStatus(&mst);
+ RAND_add(&mst, sizeof(mst), 1);
+
+ /* process ID */
+ w = GetCurrentProcessId();
+ RAND_add(&w, sizeof(w), 1);
+
+ return (1);
}
+#if OPENSSL_API_COMPAT < 0x10100000L
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();
+ RAND_poll();
+ return RAND_status();
}
-
-/* feed timing information to the PRNG */
-static void readtimer(void)
+void RAND_screen(void)
{
- DWORD w, cyclecount;
- LARGE_INTEGER l;
- static int have_perfc = 1;
-#ifndef __GNUC__
- static int have_tsc = 1;
-
- if (have_tsc) {
- __try {
- __asm {
- rdtsc
- 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);
- }
+ RAND_poll();
}
-
-/* feed screen contents to PRNG */
-/*****************************************************************************
- *
- * Created 960901 by Gertjan van Oosten, gertjan@West.NL, West Consulting B.V.
- *
- * Code adapted from
- * <URL:http://www.microsoft.com/kb/developr/win_dk/q97193.htm>;
- * 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)
-{
- 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 */
-
- /* Create a screen DC and a memory DC compatible to screen DC */
- hScrDC = CreateDC("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);
-}
-
-#else /* Unix version */
-
-#include <time.h>
-
-int RAND_poll(void)
-{
- unsigned long l;
- pid_t curr_pid = getpid();
-#ifdef DEVRANDOM
- FILE *fh;
-#endif
-
-#ifdef DEVRANDOM
- /* Use a random entropy pool device. Linux, FreeBSD and OpenBSD
- * have this. Use /dev/urandom if you can as /dev/random may block
- * if it runs out of random entries. */
-
- if ((fh = fopen(DEVRANDOM, "r")) != NULL)
- {
- unsigned char tmpbuf[ENTROPY_NEEDED];
- int n;
-
- setvbuf(fh, NULL, _IONBF, 0);
- n=fread((unsigned char *)tmpbuf,1,ENTROPY_NEEDED,fh);
- fclose(fh);
- RAND_add(tmpbuf,sizeof tmpbuf,n);
- memset(tmpbuf,0,n);
- }
#endif
- /* put in some default random data, we need more than just this */
- l=curr_pid;
- RAND_add(&l,sizeof(l),0);
- l=getuid();
- RAND_add(&l,sizeof(l),0);
-
- l=time(NULL);
- RAND_add(&l,sizeof(l),0);
-
-#ifdef DEVRANDOM
- return 1;
-#endif
- return 0;
+/* 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);
+ }
}
#endif
projects / openssl.git / blobdiff