mirror of
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Some pointing devices (e.g. gaming mice) can be set to send mouse-movement events at an extremely high sample rate like 1kHz. This apparently translates into Windows genuinely sending WM_MOUSEMOVE messages at that rate. So if you're using one of those mice, then PuTTYgen's mouse-based entropy collection system will fill its buffer almost immediately, and give you no perceptible time to actually wave the mouse around. I think that in that situation, there's also likely to be a strong correlation between the contents of successive movement events, because human-controlled mouse movements aren't fractals - the more you zoom in on a little piece of one, the more it starts to look more and more like something moving in a straight line at constant speed, because the deviations from that happen on a larger time scale than you're seeing. So this commit adds a rate limit, not on the _collection_ of the data (we'll still take all the bits we can get, thanks!), but on the rate at which we increment the _counter_ for how much entropy we think we've collected so far. That way, the user still has to spend time wiggling the mouse back and forth in a way that varies with muscle motions and introduces randomness. |
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|---|---|---|
| charset | ||
| cmake | ||
| contrib | ||
| crypto | ||
| doc | ||
| icons | ||
| keygen | ||
| otherbackends | ||
| proxy | ||
| ssh | ||
| stubs | ||
| terminal | ||
| test | ||
| unix | ||
| utils | ||
| windows | ||
| .gitignore | ||
| aqsync.c | ||
| be_list.c | ||
| Buildscr | ||
| Buildscr.cv | ||
| callback.c | ||
| cgtest.c | ||
| CHECKLST.txt | ||
| clicons.c | ||
| CMakeLists.txt | ||
| cmdgen.c | ||
| cmdline.c | ||
| config.c | ||
| console.c | ||
| console.h | ||
| defs.h | ||
| dialog.c | ||
| dialog.h | ||
| errsock.c | ||
| import.c | ||
| LATEST.VER | ||
| ldisc.c | ||
| LICENCE | ||
| licence.pl | ||
| logging.c | ||
| marshal.h | ||
| misc.h | ||
| mksrcarc.sh | ||
| mkunxarc.sh | ||
| mpint.h | ||
| network.h | ||
| pageant.c | ||
| pageant.h | ||
| pinger.c | ||
| pscp.c | ||
| psftp.c | ||
| psftp.h | ||
| psftpcommon.c | ||
| psocks.c | ||
| psocks.h | ||
| putty.h | ||
| puttymem.h | ||
| README | ||
| release.pl | ||
| settings.c | ||
| sign.sh | ||
| ssh.h | ||
| sshcr.h | ||
| sshkeygen.h | ||
| sshpubk.c | ||
| sshrand.c | ||
| storage.h | ||
| timing.c | ||
| tree234.h | ||
| version.h | ||
| x11disp.c | ||
This is the README for PuTTY, a free Windows and Unix Telnet and SSH
client.
PuTTY is built using CMake <https://cmake.org/>. To compile in the
simplest way (on any of Linux, Windows or Mac), run these commands in
the source directory:
cmake .
cmake --build .
Documentation (in various formats including Windows Help and Unix
`man' pages) is built from the Halibut (`.but') files in the `doc'
subdirectory using `doc/Makefile'. If you aren't using one of our
source snapshots, you'll need to do this yourself. Halibut can be
found at <https://www.chiark.greenend.org.uk/~sgtatham/halibut/>.
The PuTTY home web site is
https://www.chiark.greenend.org.uk/~sgtatham/putty/
If you want to send bug reports or feature requests, please read the
Feedback section of the web site before doing so. Sending one-line
reports saying `it doesn't work' will waste your time as much as
ours.
See the file LICENCE for the licence conditions.