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putty-source/unix
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Simon Tatham f133abe521 Give a sensible error when using a too-short RSA key. 
The ssh_signkey vtable has grown a new method ssh_key_invalid(), which
checks whether the key is going to be usable for constructing a
signature at all. Currently the only way this can fail is if it's an
RSA key so short that there isn't room to put all the PKCS#1
formatting in the signature preimage integer, but the return value is
an arbitrary error message just in case more reasons are needed later.

This is tested separately rather than at key-creation time because of
the signature flags system: an RSA key of intermediate length could be
valid for SHA-1 signing but not for SHA-512. So really this method
should be called at the point where you've decided what sig flags you
want to use, and you're checking if _those flags_ are OK.

On the verification side, there's no need for a separate check. If
someone presents us with an RSA key so short that it's impossible to
encode a valid signature using it, then we simply regard all
signatures as invalid.
2019-02-10 09:05:47 +00:00
..
configure Move the Unix configure script up to the top level. 2014-02-22 18:01:32 +00:00
gtkapp.c Move all extern declarations into header files. 2018-11-03 13:47:29 +00:00
gtkask.c Convert a lot of 'int' variables to 'bool'. 2018-11-03 13:45:00 +00:00
gtkcfg.c Convert a lot of 'int' variables to 'bool'. 2018-11-03 13:45:00 +00:00
gtkcols.c Add some more miscellaneous asserts. 2018-12-01 17:04:44 +00:00
gtkcols.h Convert a lot of 'int' variables to 'bool'. 2018-11-03 13:45:00 +00:00
gtkcomm.c Convert a lot of 'int' variables to 'bool'. 2018-11-03 13:45:00 +00:00
gtkcompat.h Adopt C99 <stdbool.h>'s true/false. 2018-11-03 13:45:00 +00:00
gtkdlg.c GTK: unregister dialog boxes before delivering the result. 2019-01-13 17:14:08 +00:00
gtkfont.c Add some more miscellaneous asserts. 2018-12-01 17:04:44 +00:00
gtkfont.h Convert a lot of 'int' variables to 'bool'. 2018-11-03 13:45:00 +00:00
gtkmain.c Move all extern declarations into header files. 2018-11-03 13:47:29 +00:00
gtkmisc.c Convert a lot of 'int' variables to 'bool'. 2018-11-03 13:45:00 +00:00
gtkmisc.h Convert a lot of 'int' variables to 'bool'. 2018-11-03 13:45:00 +00:00
gtkwin.c Make lots of 'int' length fields into size_t. 2019-02-06 21:46:10 +00:00
osxlaunch.c osxlaunch: stop setting DYLD_LIBRARY_PATH. 2017-12-20 10:04:02 +00:00
pterm.bundle OS X makefile: stop depending on JHBUILD_PREFIX. 2017-11-26 11:45:48 +00:00
pterm.plist Create OS X application bundles for PuTTY and pterm. 2016-03-23 22:22:48 +00:00
putty.bundle OS X makefile: stop depending on JHBUILD_PREFIX. 2017-11-26 11:45:48 +00:00
putty.plist Create OS X application bundles for PuTTY and pterm. 2016-03-23 22:22:48 +00:00
unix.h Move all extern declarations into header files. 2018-11-03 13:47:29 +00:00
ux_x11.c Uppity X forwarding: fix SockAddr use after free. 2019-01-23 21:19:26 +00:00
uxagentc.c Stop using unqualified {GET,PUT}_32BIT. 2019-02-04 20:32:31 +00:00
uxagentsock.c Close standard handles in watchdog subprocesses. 2018-10-21 10:16:16 +01:00
uxcfg.c Convert a lot of 'int' variables to 'bool'. 2018-11-03 13:45:00 +00:00
uxcons.c Make bufchain_prefix return a ptrlen. 2019-02-06 21:46:10 +00:00
uxfdsock.c Make bufchain_prefix return a ptrlen. 2019-02-06 21:46:10 +00:00
uxgen.c Unix PuTTYgen: switch to /dev/urandom by default. 2018-06-03 15:15:51 +01:00
uxgss.c Support GSS key exchange, for Kerberos 5 only. 2018-04-26 07:21:16 +01:00
uxmisc.c Convert a lot of 'int' variables to 'bool'. 2018-11-03 13:45:00 +00:00
uxnet.c Make bufchain_prefix return a ptrlen. 2019-02-06 21:46:10 +00:00
uxnogtk.c Include the compile-time GTK version in the build info. 2017-02-15 19:32:42 +00:00
uxnoise.c Replace PuTTY's PRNG with a Fortuna-like system. 2019-01-23 22:36:17 +00:00
uxpeer.c Convert a lot of 'int' variables to 'bool'. 2018-11-03 13:45:00 +00:00
uxpgnt.c Make lots of 'int' length fields into size_t. 2019-02-06 21:46:10 +00:00
uxplink.c Make bufchain_prefix return a ptrlen. 2019-02-06 21:46:10 +00:00
uxprint.c Make bufchain_prefix return a ptrlen. 2019-02-06 21:46:10 +00:00
uxproxy.c Convert a lot of 'int' variables to 'bool'. 2018-11-03 13:45:00 +00:00
uxpterm.c Label random-noise sources with an enum of ids. 2019-01-23 22:36:17 +00:00
uxpty.c Make bufchain_prefix return a ptrlen. 2019-02-06 21:46:10 +00:00
uxputty.c Convert a lot of 'int' variables to 'bool'. 2018-11-03 13:45:00 +00:00
uxsel.c Label random-noise sources with an enum of ids. 2019-01-23 22:36:17 +00:00
uxser.c Make bufchain_prefix return a ptrlen. 2019-02-06 21:46:10 +00:00
uxserver.c Give a sensible error when using a too-short RSA key. 2019-02-10 09:05:47 +00:00
uxsftp.c pscp: replace crash with diagnostic on opendir failure. 2018-12-27 16:52:23 +00:00
uxsftpserver.c uxsftpserver: cast st.st_size to uintmax_t. 2019-02-07 20:06:55 +00:00
uxshare.c Replace random_byte() with random_read(). 2019-01-23 22:36:17 +00:00
uxsignal.c Convert a lot of 'int' variables to 'bool'. 2018-11-03 13:45:00 +00:00
uxstore.c Rework mungestr() and unmungestr(). 2018-11-03 13:45:00 +00:00
uxucs.c Convert a lot of 'int' variables to 'bool'. 2018-11-03 13:45:00 +00:00
uxutils.c Support hardware SHA-256 and SHA-1 on Arm platforms. 2019-01-23 22:36:17 +00:00
x11misc.c Ignore X11 BadMatch errors during cut buffer setup. 2016-03-20 18:30:03 +00:00
x11misc.h Basic support for running under GDK Wayland back end. 2018-05-09 09:21:27 +01:00
xkeysym.c Support for non-ISO-8859-1 X keysyms. So in particular, pterm in a 2003-04-27 11:10:48 +00:00
xpmptcfg.c Tweak the icon script, and the generated icons, to more closely 2007-01-07 10:17:12 +00:00
xpmpterm.c Tweak the icon script, and the generated icons, to more closely 2007-01-07 10:17:12 +00:00
xpmpucfg.c Tweak the icon script, and the generated icons, to more closely 2007-01-07 10:17:12 +00:00
xpmputty.c Tweak the icon script, and the generated icons, to more closely 2007-01-07 10:17:12 +00:00