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/*
* Copyright 1998-2016 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
*/
/*-
* 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);
}
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