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Simon Tatham 844e766b03 RSA generation: option to generate strong primes. 
A 'strong' prime, as defined by the Handbook of Applied Cryptography,
is a prime p such that each of p-1 and p+1 has a large prime factor,
and that the large factor q of p-1 is such that q-1 in turn _also_ has
a large prime factor.

HoAC says that making your RSA key using primes of this form defeats
some factoring algorithms - but there are other faster algorithms to
which it makes no difference. So this is probably not a useful
precaution in practice. However, it has been recommended in the past
by some official standards, and it's easy to implement given the new
general facility in PrimeCandidateSource that lets you ask for your
prime to satisfy an arbitrary modular congruence. (And HoAC also says
there's no particular reason _not_ to use strong primes.) So I provide
it as an option, just in case anyone wants to select it.

The change to the key generation algorithm is entirely in sshrsag.c,
and is neatly independent of the prime-generation system in use. If
you're using Maurer provable prime generation, then the known factor q
of p-1 can be used to help certify p, and the one for q-1 to help with
q in turn; if you switch to probabilistic prime generation then you
still get an RSA key with the right structure, except that every time
the definition says 'prime factor' you just append '(probably)'.

(The probabilistic version of this procedure is described as 'Gordon's
algorithm' in HoAC section 4.4.2.)
2020-03-07 11:37:31 +00:00
..
installer.wxs Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
make_install_images.sh Remove white dialog background in MSI user interface. 2020-02-11 19:12:01 +00:00
msifixup.py Migrate all Python scripts to Python 3. 2020-03-04 21:23:49 +00:00
pageant.ico Tweak the icon script, and the generated icons, to more closely 2007-01-07 10:17:12 +00:00
pageant.mft Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
pageant.rc Grow the Windows Licence dialog. 2019-03-18 20:32:55 +00:00
pageants.ico Tweak the icon script, and the generated icons, to more closely 2007-01-07 10:17:12 +00:00
plink.rc `win-versioninfo': all builds of all Windows binaries now contain 2005-10-04 14:13:28 +00:00
pscp.ico Tweak the icon script, and the generated icons, to more closely 2007-01-07 10:17:12 +00:00
pscp.rc `win-versioninfo': all builds of all Windows binaries now contain 2005-10-04 14:13:28 +00:00
psftp.rc `win-versioninfo': all builds of all Windows binaries now contain 2005-10-04 14:13:28 +00:00
putty.ico Tweak the icon script, and the generated icons, to more closely 2007-01-07 10:17:12 +00:00
putty.mft Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
putty.rc Tweak version string resources for EMBED_CHM. 2019-03-16 12:25:23 +00:00
puttycfg.ico Tweak the icon script, and the generated icons, to more closely 2007-01-07 10:17:12 +00:00
puttygen.ico Tweak the icon script, and the generated icons, to more closely 2007-01-07 10:17:12 +00:00
puttygen.mft Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
puttygen.rc Grow the Windows Licence dialog. 2019-03-18 20:32:55 +00:00
puttyins.ico `installer.ico' doesn't fit into 8.3, so gets truncated to INSTALLE.ICO in 2007-02-06 22:39:15 +00:00
puttytel.mft Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
puttytel.rc Tweak version string resources for EMBED_CHM. 2019-03-16 12:25:23 +00:00
rcstuff.h Remove Makefile.bor. 2017-09-13 19:26:28 +01:00
README-msi.txt Remove note about .CHM on network drives. 2019-03-18 21:53:45 +00:00
sizetip.c Formatting change to braces around one case of a switch. 2020-02-16 11:26:21 +00:00
version.rc2 FIXME about Windows resource CHMfulness hint. 2019-03-18 22:02:13 +00:00
website.url Switch chiark URLs to https. 2017-05-07 16:29:01 +01:00
win_res.h Stop looking for putty.chm alongside the binary. 2019-03-16 12:25:23 +00:00
win_res.rc2 Grow the Windows Licence dialog. 2019-03-18 20:32:55 +00:00
wincapi.c Stop using GLOBAL Windows API function pointers. 2020-02-02 10:02:10 +00:00
wincapi.h Stop using GLOBAL Windows API function pointers. 2020-02-02 10:02:10 +00:00
wincfg.c Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
wincliloop.c Factor out common code from Windows CLI main loops. 2020-02-07 19:15:13 +00:00
wincons.c Make wincons logging-related functions non-static. 2020-01-31 09:41:18 +00:00
winctrls.c Formatting change to braces around one case of a switch. 2020-02-16 11:26:21 +00:00
windefs.c Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
windlg.c Formatting change to braces around one case of a switch. 2020-02-16 11:26:21 +00:00
window.c Formatting change to braces around one case of a switch. 2020-02-16 11:26:21 +00:00
wingss.c Make dupcat() into a variadic macro. 2019-10-14 19:42:37 +01:00
winhandl.c Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
winhelp.c Remove most traces of WinHelp support. 2019-03-26 00:27:04 +00:00
winhelp.h Remove most traces of WinHelp support. 2019-03-26 00:27:04 +00:00
winhelp.rc2 Tweak version string resources for EMBED_CHM. 2019-03-16 12:25:23 +00:00
winhsock.c Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
winjump.c Make dupcat() into a variadic macro. 2019-10-14 19:42:37 +01:00
winmisc.c Make dupcat() into a variadic macro. 2019-10-14 19:42:37 +01:00
winmiscs.c Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
winnet.c Formatting change to braces around one case of a switch. 2020-02-16 11:26:21 +00:00
winnohlp.c Stop looking for putty.chm alongside the binary. 2019-03-16 12:25:23 +00:00
winnoise.c Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
winnojmp.c Fix up svn:eol-style and svn:keywords on new files. 2010-12-27 00:24:48 +00:00
winnpc.c winnpc.c: add low-level connect_to_named_pipe() function. 2020-01-04 13:52:22 +00:00
winnps.c Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
winpgen.c RSA generation: option to generate strong primes. 2020-03-07 11:37:31 +00:00
winpgnt.c Formatting change to braces around one case of a switch. 2020-02-16 11:26:21 +00:00
winpgntc.c Add lots of missing 'static' keywords. 2020-01-29 06:44:18 +00:00
winplink.c Give BackendVtable separate id and displayname fields. 2020-02-22 18:27:56 +00:00
winprint.c Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
winproxy.c Make the plug_log type code into an enum. 2020-02-07 19:17:45 +00:00
winseat.h GUI PuTTY: stop using the global 'hwnd'. 2020-02-02 10:02:10 +00:00
winsecur.c Stop using GLOBAL Windows API function pointers. 2020-02-02 10:02:10 +00:00
winsecur.h Stop using GLOBAL Windows API function pointers. 2020-02-02 10:02:10 +00:00
winselcli.c Const-correctness in do_select() return value. 2020-01-04 13:52:22 +00:00
winselgui.c Const-correctness in do_select() return value. 2020-01-04 13:52:22 +00:00
winser.c Pass the BackendVtable pointer to backend_init. 2020-02-22 18:27:56 +00:00
winsftp.c Factor out common code from Windows CLI main loops. 2020-02-07 19:15:13 +00:00
winshare.c Move obfuscate_name out of winshare.c. 2020-01-04 13:52:22 +00:00
winsocks.c Auxiliary application: 'psocks', a simple SOCKS server. 2020-02-23 16:36:27 +00:00
winstore.c Make dupcat() into a variadic macro. 2019-10-14 19:42:37 +01:00
winstuff.h Factor out common code from Windows CLI main loops. 2020-02-07 19:15:13 +00:00
wintime.c wintime: add a precautionary memset to zero. 2017-02-14 23:25:25 +00:00
winucs.c Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
winutils.c Stop winutils.c from depending on the global HWND. 2020-02-02 10:02:10 +00:00
winx11.c Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00