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Simon Tatham 21d4754b6a Initial support for host certificates.
Now we offer the OpenSSH certificate key types in our KEXINIT host key
algorithm list, so that if the server has a certificate, they can send
it to us.

There's a new storage.h abstraction for representing a list of trusted
host CAs, and which ones are trusted to certify hosts for what
domains. This is stored outside the normal saved session data, because
the whole point of host certificates is to avoid per-host faffing.

Configuring this set of trusted CAs is done via a new GUI dialog box,
separate from the main PuTTY config box (because it modifies a single
set of settings across all saved sessions), which you can launch by
clicking a button in the 'Host keys' pane. The GUI is pretty crude for
the moment, and very much at a 'just about usable' stage right now. It
will want some polishing.

If we have no CA configured that matches the hostname, we don't offer
to receive certified host keys in the first place. So for existing
users who haven't set any of this up yet, nothing will immediately
change.

Currently, if we do offer to receive certified host keys and the
server presents one signed by a CA we don't trust, PuTTY will bomb out
unconditionally with an error, instead of offering a confirmation box.
That's an unfinished part which I plan to fix before this goes into a
release.
2022-04-25 15:09:31 +01:00
charset Update source file names in comments and docs. 2022-01-22 15:51:31 +00:00
cmake Windows tools: assorted '-demo' options. 2022-04-02 17:23:34 +01:00
contrib Fix a batch of typos in comments and docs. 2022-01-03 06:40:51 +00:00
crypto Certificate-specific ssh_key method suite. 2022-04-25 15:09:31 +01:00
doc Merge GSSAPI/DNS docs addition from 'pre-0.77'. 2022-02-22 18:45:51 +00:00
icons New script to draw the icons as SVG. 2022-03-18 12:55:01 +00:00
keygen Generalise strbuf_catf() into put_fmt(). 2021-11-19 11:32:47 +00:00
otherbackends Resurrect the test backends. 2022-04-02 16:13:27 +01:00
proxy Add exec/subsystem versions of SSH proxying. 2022-04-25 14:10:16 +01:00
ssh Initial support for host certificates. 2022-04-25 15:09:31 +01:00
stubs nocmdline.c: remove unused stub of cmdline_process_param. 2022-01-22 15:51:25 +00:00
terminal Cancel drag-select when the context menu pops up. 2022-03-29 18:06:14 +01:00
test Certificate-specific ssh_key method suite. 2022-04-25 15:09:31 +01:00
unix Initial support for host certificates. 2022-04-25 15:09:31 +01:00
utils Initial support for host certificates. 2022-04-25 15:09:31 +01:00
windows Initial support for host certificates. 2022-04-25 15:09:31 +01:00
.gitignore Add .gitignore rules for in-tree builds. 2021-04-19 18:26:56 +01:00
aqsync.c Build outgoing SSH agent requests in a strbuf. 2018-05-25 14:36:16 +01:00
be_list.c Merge be_*.c into one ifdef-controlled module. 2021-11-26 17:58:55 +00:00
Buildscr Put all the docs formats into the tarball. 2021-12-21 09:49:58 +00:00
Buildscr.cv Replace mkfiles.pl with a CMake build system. 2021-04-17 13:53:02 +01:00
callback.c Add lots of missing 'static' keywords. 2020-01-29 06:44:18 +00:00
cgtest.c Richer data type for interactive prompt results. 2021-12-28 18:08:31 +00:00
CHECKLST.txt Compatibility with older versions of cmake. 2021-10-29 18:08:18 +01:00
clicons.c Change vtable defs to use C99 designated initialisers. 2020-03-10 21:06:29 +00:00
CMakeLists.txt Add a manual single-char UTF-8 decoder. 2022-03-12 18:51:21 +00:00
cmdgen.c PuTTYgen: options to add and remove certificates. 2022-04-25 15:09:31 +01:00
cmdline.c Support for detached certificates in userauth. 2022-04-25 15:09:31 +01:00
config.c Initial support for host certificates. 2022-04-25 15:09:31 +01:00
console.c Mention the host name in host-key prompts. 2021-09-16 14:33:59 +01:00
console.h Mention the host name in host-key prompts. 2021-09-16 14:33:59 +01:00
defs.h Initial support for host certificates. 2022-04-25 15:09:31 +01:00
dialog.c dialog system: add a side-by-side alignment feature. 2021-04-10 09:43:25 +01:00
dialog.h dialog system: add a side-by-side alignment feature. 2021-04-10 09:43:25 +01:00
errsock.c Change vtable defs to use C99 designated initialisers. 2020-03-10 21:06:29 +00:00
import.c OpenSSH key export: strip certificates. 2022-04-25 15:09:31 +01:00
LATEST.VER Update version number for 0.76 release. 2021-07-10 10:39:20 +01:00
ldisc.c free_prompts: deal with a reference from an Ldisc. 2021-09-16 13:55:10 +01:00
LICENCE It's a new year. 2022-01-04 10:17:17 +00:00
licence.pl Separate the functions of licence.pl. 2021-04-17 13:52:27 +01:00
logging.c sshproxy: share the caller's LogPolicy. 2021-09-13 17:18:31 +01:00
marshal.h Remove duplicated string-literal formatter in Telnet proxy. 2021-12-22 15:05:04 +00:00
misc.h Improve the base64 utility functions. 2022-04-25 14:10:16 +01:00
mksrcarc.sh Replace mkfiles.pl with a CMake build system. 2021-04-17 13:53:02 +01:00
mkunxarc.sh Integrate the 'doc' subdir into the CMake system. 2021-05-03 17:01:55 +01:00
mpint.h Utility function mp_resize. 2022-04-15 17:46:06 +01:00
network.h net_service_lookup: add missing 'const'. 2022-01-22 15:51:33 +00:00
pageant.c Make ssh_keyalg's supported_flags a method. 2022-04-24 08:39:04 +01:00
pageant.h winpgnt: menu options to delete/reencrypt everything. 2021-04-04 10:02:24 +01:00
pinger.c Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
pscp.c Update source file names in comments and docs. 2022-01-22 15:51:31 +00:00
psftp.c Merge be_*.c into one ifdef-controlled module. 2021-11-26 17:58:55 +00:00
psftp.h Remove FLAG_VERBOSE. 2020-01-30 06:40:21 +00:00
psftpcommon.c Move the SSH implementation into its own subdirectory. 2021-04-22 18:09:13 +01:00
psocks.c New API for plug_closing() with a custom type enum. 2021-11-06 14:48:26 +00:00
psocks.h Auxiliary application: 'psocks', a simple SOCKS server. 2020-02-23 16:36:27 +00:00
putty.h Initial support for host certificates. 2022-04-25 15:09:31 +01:00
puttymem.h Update source file names in comments and docs. 2022-01-22 15:51:31 +00:00
README Replace mkfiles.pl with a CMake build system. 2021-04-17 13:53:02 +01:00
release.pl Replace mkfiles.pl with a CMake build system. 2021-04-17 13:53:02 +01:00
settings.c Support for detached certificates in userauth. 2022-04-25 15:09:31 +01:00
sign.sh GPG key rollover. 2021-08-14 08:02:27 +01:00
ssh.h Certificate-specific ssh_key method suite. 2022-04-25 15:09:31 +01:00
sshcr.h Update source file names in comments and docs. 2022-01-22 15:51:31 +00:00
sshkeygen.h Side-channel-safe rewrite of the Miller-Rabin test. 2021-08-27 18:04:49 +01:00
sshpubk.c Family of key types for OpenSSH certificates. 2022-04-25 15:09:31 +01:00
sshrand.c Remove dependency of sshrand.c on SHA-512. 2020-09-13 09:11:31 +01:00
storage.h Initial support for host certificates. 2022-04-25 15:09:31 +01:00
timing.c Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
tree234.h Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
version.h Replace mkfiles.pl with a CMake build system. 2021-04-17 13:53:02 +01:00
x11disp.c Move the SSH implementation into its own subdirectory. 2021-04-22 18:09:13 +01:00

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.