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0b42fed9bd
Jacob pointed out that a free-text field for entering a key size in bits is all very well for key types where we actually _can_ generate a key to a size of your choice, but less useful for key types where there are only three (or one) legal values for the field, especially if we don't _say_ what they are. So I've revamped the UI a bit: now, in ECDSA mode, you get a dropdown list selector showing the available elliptic curves (and they're even named, rather than just given by bit count), and in ED25519 mode even that disappears. The curve selector for ECDSA and the bits selector for RSA/DSA are independent controls, so each one remembers its last known value even while temporarily hidden in favour of the other. The actual generation function still expects a bit count rather than an actual curve or algorithm ID, so the easiest way to actually arrange to populate the drop-down list was to have an array of bit counts exposed by sshecc.c. That's a bit ugly, but there we go. One small functional change: if you enter an absurdly low value into the RSA/DSA bit count box (under 256), PuTTYgen used to give a warning and reset it to 256. Now it resets it to the default key length of 2048, basically because I was touching that code anyway to change a variable name and just couldn't bring myself to leave it in a state where it intentionally chose such an utterly useless key size. Of course this doesn't prevent generation of 256-bit keys if someone still really wants one - it just means they don't get one selected as the result of a typo.
PuTTY README
============
This is the README file for the PuTTY installer distribution. If
you're reading this, you've probably just run our installer and
installed PuTTY on your system.
What should I do next?
----------------------
If you want to use PuTTY to connect to other computers, or use PSFTP
to transfer files, you should just be able to run them from the
Start menu.
If you want to use the command-line-only file transfer utility PSCP,
you will probably want to put the PuTTY installation directory on
your PATH. On Windows 7 and similar versions, you can do this at
Control Panel > System and Security > System > Advanced system
settings > Environment Variables.
Some versions of Windows will refuse to run HTML Help files (.CHM)
if they are installed on a network drive. If you have installed
PuTTY on a network drive, you might want to check that the help file
works properly. If not, see http://support.microsoft.com/kb/896054
for information on how to solve this problem.
What do I do if it doesn't work?
--------------------------------
The PuTTY home web site is
http://www.chiark.greenend.org.uk/~sgtatham/putty/
Here you will find our list of known bugs and pending feature
requests. If your problem is not listed in there, or in the FAQ, or
in the manuals, read the Feedback page to find out how to report
bugs to us. PLEASE read the Feedback page carefully: it is there to
save you time as well as us. Do not send us one-line bug reports
telling us `it doesn't work'.