/* apps/winrand.c */

 /* ====================================================================

  * 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).

  *

  */

 /* Usage: winrand [filename]

  *

  * Collects entropy from mouse movements and other events and writes

  * random data to filename or .rnd

  */

 #include <windows.h>

 #include <openssl/opensslv.h>

 #include <openssl/rand.h>

 LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

 const char *filename;

 int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,

         PSTR cmdline, int iCmdShow)

 	{

 	static char appname[] = "OpenSSL";

 	HWND hwnd;

 	MSG msg;

 	WNDCLASSEX wndclass;

         char buffer[200];

         if (cmdline[0] == '\0')

                 filename = RAND_file_name(buffer, sizeof buffer);

         else

                 filename = cmdline;

         RAND_load_file(filename, -1);

 	wndclass.cbSize = sizeof(wndclass);

 	wndclass.style = CS_HREDRAW | CS_VREDRAW;

 	wndclass.lpfnWndProc = WndProc;

 	wndclass.cbClsExtra = 0;

 	wndclass.cbWndExtra = 0;

 	wndclass.hInstance = hInstance;

 	wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);

 	wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);

 	wndclass.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);

 	wndclass.lpszMenuName = NULL;

         wndclass.lpszClassName = appname;

 	wndclass.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

 	RegisterClassEx(&wndclass);

         hwnd = CreateWindow(appname, OPENSSL_VERSION_TEXT,

 		WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT,

 		CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);

 	ShowWindow(hwnd, iCmdShow);

 	UpdateWindow(hwnd);

 	while (GetMessage(&msg, NULL, 0, 0))

 		{

 		TranslateMessage(&msg);

 		DispatchMessage(&msg);

 		}

 	return msg.wParam;

 	}

 LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)

 	{

         HDC hdc;

 	PAINTSTRUCT ps;

         RECT rect;

         static int seeded = 0;

 	switch (iMsg)

 		{

 	case WM_PAINT:

 		hdc = BeginPaint(hwnd, &ps);

 		GetClientRect(hwnd, &rect);

                 DrawText(hdc, "Seeding the PRNG. Please move the mouse!", -1,

 			&rect, DT_SINGLELINE | DT_CENTER | DT_VCENTER);

 		EndPaint(hwnd, &ps);

 		return 0;

         case WM_DESTROY:

                 PostQuitMessage(0);

                 return 0;

                 }

         if (RAND_event(iMsg, wParam, lParam) == 1 && seeded == 0)

                 {

                 seeded = 1;

                 if (RAND_write_file(filename) <= 0)

                         MessageBox(hwnd, "Couldn't write random file!",

 				"OpenSSL", MB_OK | MB_ICONERROR);

                 PostQuitMessage(0);

                 }

 	return DefWindowProc(hwnd, iMsg, wParam, lParam);

 	}