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| author | marha <marha@users.sourceforge.net> | 2010-11-19 10:30:56 +0000 |
|---|---|---|
| committer | marha <marha@users.sourceforge.net> | 2010-11-19 10:30:56 +0000 |
| commit | 20a8b976130e3b2cfff5c3364169e61ec10291f3 (patch) | |
| tree | b2fbea50cfb846049fc690a252baec07397a1acc /tools/plink/winnoise.c | |
| parent | 0b67cceb98ba4ab7b5cdaf9d6e9583d3c53802ea (diff) | |
| download | vcxsrv-20a8b976130e3b2cfff5c3364169e61ec10291f3.tar.gz vcxsrv-20a8b976130e3b2cfff5c3364169e61ec10291f3.tar.bz2 vcxsrv-20a8b976130e3b2cfff5c3364169e61ec10291f3.zip | |
Copied tools directory from trunk. Here the original versions will be checked in, so that we can update them and merge the changes back in.
Diffstat (limited to 'tools/plink/winnoise.c')
| -rw-r--r-- | tools/plink/winnoise.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/tools/plink/winnoise.c b/tools/plink/winnoise.c new file mode 100644 index 000000000..bdf869719 --- /dev/null +++ b/tools/plink/winnoise.c @@ -0,0 +1,128 @@ +/*
+ * Noise generation for PuTTY's cryptographic random number
+ * generator.
+ */
+
+#include <stdio.h>
+
+#include "putty.h"
+#include "ssh.h"
+#include "storage.h"
+
+/*
+ * This function is called once, at PuTTY startup, and will do some
+ * seriously silly things like listing directories and getting disk
+ * free space and a process snapshot.
+ */
+
+void noise_get_heavy(void (*func) (void *, int))
+{
+ HANDLE srch;
+ WIN32_FIND_DATA finddata;
+ DWORD pid;
+ char winpath[MAX_PATH + 3];
+
+ GetWindowsDirectory(winpath, sizeof(winpath));
+ strcat(winpath, "\\*");
+ srch = FindFirstFile(winpath, &finddata);
+ if (srch != INVALID_HANDLE_VALUE) {
+ do {
+ func(&finddata, sizeof(finddata));
+ } while (FindNextFile(srch, &finddata));
+ FindClose(srch);
+ }
+
+ pid = GetCurrentProcessId();
+ func(&pid, sizeof(pid));
+
+ read_random_seed(func);
+ /* Update the seed immediately, in case another instance uses it. */
+ random_save_seed();
+}
+
+void random_save_seed(void)
+{
+ int len;
+ void *data;
+
+ if (random_active) {
+ random_get_savedata(&data, &len);
+ write_random_seed(data, len);
+ sfree(data);
+ }
+}
+
+/*
+ * This function is called every time the random pool needs
+ * stirring, and will acquire the system time in all available
+ * forms.
+ */
+void noise_get_light(void (*func) (void *, int))
+{
+ SYSTEMTIME systime;
+ DWORD adjust[2];
+ BOOL rubbish;
+
+ GetSystemTime(&systime);
+ func(&systime, sizeof(systime));
+
+ GetSystemTimeAdjustment(&adjust[0], &adjust[1], &rubbish);
+ func(&adjust, sizeof(adjust));
+}
+
+/*
+ * 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(×, sizeof(times));
+ GetProcessTimes(GetCurrentProcess(), times, times + 1, times + 2,
+ times + 3);
+ random_add_noise(×, 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(unsigned long data)
+{
+ DWORD wintime;
+ LARGE_INTEGER perftime;
+
+ random_add_noise(&data, sizeof(DWORD));
+
+ wintime = GetTickCount();
+ random_add_noise(&wintime, sizeof(DWORD));
+
+ if (QueryPerformanceCounter(&perftime))
+ random_add_noise(&perftime, sizeof(perftime));
+}
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