/*
- * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2018 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
#include "internal/cryptlib.h"
#include <openssl/rand.h>
#include "rand_lcl.h"
-
+#include "internal/rand_int.h"
#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
-# include <windows.h>
-# ifndef _WIN32_WINNT
-# define _WIN32_WINNT 0x0400
+
+# ifndef OPENSSL_RAND_SEED_OS
+# error "Unsupported seeding method configured; must be os"
# endif
-# include <wincrypt.h>
-# include <tlhelp32.h>
-/*
- * Limit the time spent walking through the heap, processes, threads and
- * modules to a maximum of 1000 milliseconds each, unless CryptoGenRandom
- * failed
- */
-# define MAXDELAY 1000
+# 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 USE_BCRYPTGENRANDOM
+# endif
+# ifdef USE_BCRYPTGENRANDOM
+# 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 L"Intel Hardware Cryptographic Service Provider"
-
-static void readtimer(void);
-static void readscreen(void);
+# define PROV_INTEL_SEC 22
+# define INTEL_DEF_PROV L"Intel Hardware Cryptographic Service Provider"
+# endif
-/*
- * 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.
- */
+size_t rand_pool_acquire_entropy(RAND_POOL *pool)
+{
+# ifndef USE_BCRYPTGENRANDOM
+ HCRYPTPROV hProvider;
+# endif
+ unsigned char *buffer;
+ size_t bytes_needed;
+ size_t entropy_available = 0;
-# 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 */
+# ifdef OPENSSL_RAND_SEED_RDTSC
+ entropy_available = rand_acquire_entropy_from_tsc(pool);
+ if (entropy_available > 0)
+ return entropy_available;
+# endif
-int RAND_poll(void)
-{
- MEMORYSTATUS mst;
- HCRYPTPROV hProvider = 0;
- DWORD w;
- BYTE buf[64];
+# ifdef OPENSSL_RAND_SEED_RDCPU
+ entropy_available = rand_acquire_entropy_from_cpu(pool);
+ if (entropy_available > 0)
+ return entropy_available;
+# endif
- /* 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);
+# ifdef USE_BCRYPTGENRANDOM
+ bytes_needed = rand_pool_bytes_needed(pool, 1 /*entropy_factor*/);
+ buffer = rand_pool_add_begin(pool, bytes_needed);
+ if (buffer != NULL) {
+ size_t bytes = 0;
+ if (BCryptGenRandom(NULL, buffer, bytes_needed,
+ BCRYPT_USE_SYSTEM_PREFERRED_RNG) == STATUS_SUCCESS)
+ bytes = bytes_needed;
+
+ rand_pool_add_end(pool, bytes, 8 * bytes);
+ entropy_available = rand_pool_entropy_available(pool);
}
+ if (entropy_available > 0)
+ return entropy_available;
+# else
+ bytes_needed = rand_pool_bytes_needed(pool, 1 /*entropy_factor*/);
+ buffer = rand_pool_add_begin(pool, bytes_needed);
+ if (buffer != NULL) {
+ size_t bytes = 0;
+ /* poll the CryptoAPI PRNG */
+ if (CryptAcquireContextW(&hProvider, NULL, NULL, PROV_RSA_FULL,
+ CRYPT_VERIFYCONTEXT | CRYPT_SILENT) != 0) {
+ if (CryptGenRandom(hProvider, bytes_needed, buffer) != 0)
+ bytes = bytes_needed;
+
+ CryptReleaseContext(hProvider, 0);
+ }
- /* 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));
+ rand_pool_add_end(pool, bytes, 8 * bytes);
+ entropy_available = rand_pool_entropy_available(pool);
+ }
+ if (entropy_available > 0)
+ return entropy_available;
+
+ bytes_needed = rand_pool_bytes_needed(pool, 1 /*entropy_factor*/);
+ buffer = rand_pool_add_begin(pool, bytes_needed);
+ if (buffer != NULL) {
+ size_t bytes = 0;
+ /* poll the Pentium PRG with CryptoAPI */
+ if (CryptAcquireContextW(&hProvider, NULL,
+ INTEL_DEF_PROV, PROV_INTEL_SEC,
+ CRYPT_VERIFYCONTEXT | CRYPT_SILENT) != 0) {
+ if (CryptGenRandom(hProvider, bytes_needed, buffer) != 0)
+ bytes = bytes_needed;
+
+ CryptReleaseContext(hProvider, 0);
}
- CryptReleaseContext(hProvider, 0);
+ rand_pool_add_end(pool, bytes, 8 * bytes);
+ entropy_available = rand_pool_entropy_available(pool);
}
+ if (entropy_available > 0)
+ return entropy_available;
+# endif
- /* timer data */
- readtimer();
+ return rand_pool_entropy_available(pool);
+}
- /* memory usage statistics */
- GlobalMemoryStatus(&mst);
- RAND_add(&mst, sizeof(mst), 1);
- /* process ID */
- w = GetCurrentProcessId();
- RAND_add(&w, sizeof(w), 1);
+int rand_pool_add_nonce_data(RAND_POOL *pool)
+{
+ struct {
+ DWORD pid;
+ DWORD tid;
+ FILETIME time;
+ } data = { 0 };
+
+ /*
+ * Add process id, thread id, and a high resolution timestamp to
+ * ensure that the nonce is unique whith high probability for
+ * different process instances.
+ */
+ data.pid = GetCurrentProcessId();
+ data.tid = GetCurrentThreadId();
+ GetSystemTimeAsFileTime(&data.time);
+
+ return rand_pool_add(pool, (unsigned char *)&data, sizeof(data), 0);
+}
- return (1);
+int rand_pool_add_additional_data(RAND_POOL *pool)
+{
+ struct {
+ DWORD tid;
+ LARGE_INTEGER time;
+ } data = { 0 };
+
+ /*
+ * Add some noise from the thread id and a high resolution timer.
+ * The thread id adds a little randomness if the drbg is accessed
+ * concurrently (which is the case for the <master> drbg).
+ */
+ data.tid = GetCurrentThreadId();
+ QueryPerformanceCounter(&data.time);
+ return rand_pool_add(pool, (unsigned char *)&data, sizeof(data), 0);
}
+# 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());
+ RAND_poll();
+ 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);
- }
+int rand_pool_init(void)
+{
+ return 1;
}
-/* 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)
+void rand_pool_cleanup(void)
{
-# if !defined(OPENSSL_SYS_WIN32_CYGWIN)
- 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 != NULL) {
- /* 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_CYGWIN */
+void rand_pool_keep_random_devices_open(int keep)
+{
}
#endif
projects / openssl.git / blobdiff