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320bf8479f
This tears out the entire previous random-pool system in sshrand.c. In its place is a system pretty close to Ferguson and Schneier's 'Fortuna' generator, with the main difference being that I use SHA-256 instead of AES for the generation side of the system (rationale given in comment). The PRNG implementation lives in sshprng.c, and defines a self- contained data type with no state stored outside the object, so you can instantiate however many of them you like. The old sshrand.c still exists, but in place of the previous random pool system, it's just become a client of sshprng.c, whose job is to hold a single global instance of the PRNG type, and manage its reference count, save file, noise-collection timers and similar administrative business. Advantages of this change include: - Fortuna is designed with a more varied threat model in mind than my old home-grown random pool. For example, after any request for random numbers, it automatically re-seeds itself, so that if the state of the PRNG should be leaked, it won't give enough information to find out what past outputs _were_. - The PRNG type can be instantiated with any hash function; the instance used by the main tools is based on SHA-256, an improvement on the old pool's use of SHA-1. - The new PRNG only uses the completely standard interface to the hash function API, instead of having to have privileged access to the internal SHA-1 block transform function. This will make it easier to revamp the hash code in general, and also it means that hardware-accelerated versions of SHA-256 will automatically be used for the PRNG as well as for everything else. - The new PRNG can be _tested_! Because it has an actual (if not quite explicit) specification for exactly what the output numbers _ought_ to be derived from the hashes of, I can (and have) put tests in cryptsuite that ensure the output really is being derived in the way I think it is. The old pool could have been returning any old nonsense and it would have been very hard to tell for sure. |
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| .. | ||
| installer.wxs | ||
| msiplatform.py | ||
| pageant.ico | ||
| pageant.mft | ||
| pageant.rc | ||
| pageants.ico | ||
| plink.rc | ||
| pscp.ico | ||
| pscp.rc | ||
| psftp.rc | ||
| putty.ico | ||
| putty.iss | ||
| putty.mft | ||
| putty.rc | ||
| puttycfg.ico | ||
| puttygen.ico | ||
| puttygen.mft | ||
| puttygen.rc | ||
| puttyins.ico | ||
| puttytel.mft | ||
| puttytel.rc | ||
| rcstuff.h | ||
| README-msi.txt | ||
| README.txt | ||
| sizetip.c | ||
| version.rc2 | ||
| website.url | ||
| win_res.h | ||
| win_res.rc2 | ||
| wincapi.c | ||
| wincapi.h | ||
| wincfg.c | ||
| wincons.c | ||
| winctrls.c | ||
| windefs.c | ||
| windlg.c | ||
| window.c | ||
| wingss.c | ||
| winhandl.c | ||
| winhelp.c | ||
| winhelp.h | ||
| winhsock.c | ||
| winjump.c | ||
| winmisc.c | ||
| winmiscs.c | ||
| winnet.c | ||
| winnoise.c | ||
| winnojmp.c | ||
| winnpc.c | ||
| winnps.c | ||
| winpgen.c | ||
| winpgnt.c | ||
| winpgntc.c | ||
| winplink.c | ||
| winprint.c | ||
| winproxy.c | ||
| winsecur.c | ||
| winsecur.h | ||
| winser.c | ||
| winsftp.c | ||
| winshare.c | ||
| winstore.c | ||
| winstuff.h | ||
| wintime.c | ||
| winucs.c | ||
| winutils.c | ||
| winx11.c | ||
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
https://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'.