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dac0d45699
Specifically, we explicitly closesocket() all open sockets, which appears to be necessary since otherwise Windows sends RST rather than FIN. I'm _sure_ that's a Windows bug, but there we go. [originally from svn r1574]
145 lines
3.4 KiB
C
145 lines
3.4 KiB
C
/*
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* Noise generation for PuTTY's cryptographic random number
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* generator.
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*/
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#include <windows.h>
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#include <stdio.h>
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#include "putty.h"
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#include "ssh.h"
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#include "storage.h"
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/*
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* GetSystemPowerStatus function.
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*/
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typedef BOOL(WINAPI * gsps_t) (LPSYSTEM_POWER_STATUS);
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static gsps_t gsps;
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/*
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* This function is called once, at PuTTY startup, and will do some
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* seriously silly things like listing directories and getting disk
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* free space and a process snapshot.
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*/
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void noise_get_heavy(void (*func) (void *, int))
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{
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HANDLE srch;
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WIN32_FIND_DATA finddata;
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char winpath[MAX_PATH + 3];
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HMODULE mod;
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GetWindowsDirectory(winpath, sizeof(winpath));
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strcat(winpath, "\\*");
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srch = FindFirstFile(winpath, &finddata);
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if (srch != INVALID_HANDLE_VALUE) {
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do {
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func(&finddata, sizeof(finddata));
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} while (FindNextFile(srch, &finddata));
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FindClose(srch);
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}
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read_random_seed(func);
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gsps = NULL;
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mod = GetModuleHandle("KERNEL32");
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if (mod) {
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gsps = (gsps_t) GetProcAddress(mod, "GetSystemPowerStatus");
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}
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}
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void random_save_seed(void)
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{
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int len;
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void *data;
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if (random_active) {
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random_get_savedata(&data, &len);
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write_random_seed(data, len);
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}
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}
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/*
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* This function is called every time the random pool needs
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* stirring, and will acquire the system time in all available
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* forms and the battery status.
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*/
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void noise_get_light(void (*func) (void *, int))
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{
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SYSTEMTIME systime;
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DWORD adjust[2];
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BOOL rubbish;
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SYSTEM_POWER_STATUS pwrstat;
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GetSystemTime(&systime);
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func(&systime, sizeof(systime));
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GetSystemTimeAdjustment(&adjust[0], &adjust[1], &rubbish);
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func(&adjust, sizeof(adjust));
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/*
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* Call GetSystemPowerStatus if present.
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*/
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if (gsps) {
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if (gsps(&pwrstat))
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func(&pwrstat, sizeof(pwrstat));
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}
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}
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/*
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* This function is called on a timer, and it will monitor
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* frequently changing quantities such as the state of physical and
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* virtual memory, the state of the process's message queue, which
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* window is in the foreground, which owns the clipboard, etc.
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*/
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void noise_regular(void)
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{
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HWND w;
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DWORD z;
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POINT pt;
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MEMORYSTATUS memstat;
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FILETIME times[4];
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w = GetForegroundWindow();
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random_add_noise(&w, sizeof(w));
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w = GetCapture();
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random_add_noise(&w, sizeof(w));
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w = GetClipboardOwner();
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random_add_noise(&w, sizeof(w));
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z = GetQueueStatus(QS_ALLEVENTS);
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random_add_noise(&z, sizeof(z));
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GetCursorPos(&pt);
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random_add_noise(&pt, sizeof(pt));
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GlobalMemoryStatus(&memstat);
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random_add_noise(&memstat, sizeof(memstat));
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GetThreadTimes(GetCurrentThread(), times, times + 1, times + 2,
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times + 3);
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random_add_noise(×, sizeof(times));
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GetProcessTimes(GetCurrentProcess(), times, times + 1, times + 2,
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times + 3);
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random_add_noise(×, sizeof(times));
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}
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/*
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* This function is called on every keypress or mouse move, and
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* will add the current Windows time and performance monitor
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* counter to the noise pool. It gets the scan code or mouse
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* position passed in.
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*/
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void noise_ultralight(DWORD data)
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{
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DWORD wintime;
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LARGE_INTEGER perftime;
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random_add_noise(&data, sizeof(DWORD));
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wintime = GetTickCount();
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random_add_noise(&wintime, sizeof(DWORD));
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if (QueryPerformanceCounter(&perftime))
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random_add_noise(&perftime, sizeof(perftime));
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}
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