X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/277ab4522131130e876b5ea8432217f93fc136f4..7440fd4419acfc9c784f142fb9dee3e64c9a18c2:/noise.c

diff --git a/noise.c b/noise.c
index ad257f56..00719bbd 100644
--- a/noise.c
+++ b/noise.c
@@ -3,7 +3,6 @@
  * generator.
  */
 
-#include <windows.h>
 #include <stdio.h>
 
 #include "putty.h"
@@ -13,8 +12,8 @@
 /*
  * GetSystemPowerStatus function.
  */
-typedef BOOL (WINAPI *gsps_t)(LPSYSTEM_POWER_STATUS);
-gsps_t gsps;
+typedef BOOL(WINAPI * gsps_t) (LPSYSTEM_POWER_STATUS);
+static gsps_t gsps;
 
 /*
  * This function is called once, at PuTTY startup, and will do some
@@ -22,10 +21,11 @@ gsps_t gsps;
  * free space and a process snapshot.
  */
 
-void noise_get_heavy(void (*func) (void *, int)) {
+void noise_get_heavy(void (*func) (void *, int))
+{
     HANDLE srch;
     WIN32_FIND_DATA finddata;
-    char winpath[MAX_PATH+3];
+    char winpath[MAX_PATH + 3];
     HMODULE mod;
 
     GetWindowsDirectory(winpath, sizeof(winpath));
@@ -39,20 +39,26 @@ void noise_get_heavy(void (*func) (void *, int)) {
     }
 
     read_random_seed(func);
+    /* Update the seed immediately, in case another instance uses it. */
+    random_save_seed();
 
     gsps = NULL;
     mod = GetModuleHandle("KERNEL32");
     if (mod) {
-        gsps = (gsps_t)GetProcAddress(mod, "GetSystemPowerStatus");
+	gsps = (gsps_t) GetProcAddress(mod, "GetSystemPowerStatus");
     }
 }
 
-void random_save_seed(void) {
+void random_save_seed(void)
+{
     int len;
     void *data;
 
-    random_get_savedata(&data, &len);
-    write_random_seed(data, len);
+    if (random_active) {
+	random_get_savedata(&data, &len);
+	write_random_seed(data, len);
+	sfree(data);
+    }
 }
 
 /*
@@ -60,7 +66,8 @@ void random_save_seed(void) {
  * stirring, and will acquire the system time in all available
  * forms and the battery status.
  */
-void noise_get_light(void (*func) (void *, int)) {
+void noise_get_light(void (*func) (void *, int))
+{
     SYSTEMTIME systime;
     DWORD adjust[2];
     BOOL rubbish;
@@ -76,18 +83,56 @@ void noise_get_light(void (*func) (void *, int)) {
      * Call GetSystemPowerStatus if present.
      */
     if (gsps) {
-        if (gsps(&pwrstat))
-            func(&pwrstat, sizeof(pwrstat));
+	if (gsps(&pwrstat))
+	    func(&pwrstat, sizeof(pwrstat));
     }
 }
 
 /*
+ * This function is called on a timer, and it will monitor
+ * frequently changing quantities such as the state of physical and
+ * virtual memory, the state of the process's message queue, which
+ * window is in the foreground, which owns the clipboard, etc.
+ */
+void noise_regular(void)
+{
+    HWND w;
+    DWORD z;
+    POINT pt;
+    MEMORYSTATUS memstat;
+    FILETIME times[4];
+
+    w = GetForegroundWindow();
+    random_add_noise(&w, sizeof(w));
+    w = GetCapture();
+    random_add_noise(&w, sizeof(w));
+    w = GetClipboardOwner();
+    random_add_noise(&w, sizeof(w));
+    z = GetQueueStatus(QS_ALLEVENTS);
+    random_add_noise(&z, sizeof(z));
+
+    GetCursorPos(&pt);
+    random_add_noise(&pt, sizeof(pt));
+
+    GlobalMemoryStatus(&memstat);
+    random_add_noise(&memstat, sizeof(memstat));
+
+    GetThreadTimes(GetCurrentThread(), times, times + 1, times + 2,
+		   times + 3);
+    random_add_noise(&times, sizeof(times));
+    GetProcessTimes(GetCurrentProcess(), times, times + 1, times + 2,
+		    times + 3);
+    random_add_noise(&times, sizeof(times));
+}
+
+/*
  * This function is called on every keypress or mouse move, and
  * will add the current Windows time and performance monitor
  * counter to the noise pool. It gets the scan code or mouse
  * position passed in.
  */
-void noise_ultralight(DWORD data) {
+void noise_ultralight(unsigned long data)
+{
     DWORD wintime;
     LARGE_INTEGER perftime;