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Simon Tatham 809a4eb249 testcrypt.py: avoid restarting subprocess for frees.
I just ran into a bug in which the testcrypt child process was cleanly
terminated, but at least one Python object was left lying around
containing the identifier of a testcrypt object that had never been
freed. On program exit, the Python reference count on that object went
to zero, the __del__ method was invoked, and childprocess.funcall
started a _new_ instance of testcrypt just so it could tell it to free
the object identifier - which, of course, the new testcrypt had never
heard of!

We can already tell the difference between a ChildProcess object which
has no subprocess because it hasn't yet been started, and one which
has no subprocess because it's terminated: the latter has exitstatus
set to something other than None. So now we enforce by assertion that
we don't ever restart the child process, and the __del__ method avoids
doing anything if the child has already finished.
2020-02-29 12:13:32 +00:00
charset
contrib
doc New protocol: PROT_SSHCONN, bare ssh-connection. 2020-02-22 18:42:13 +00:00
icons
test testcrypt.py: avoid restarting subprocess for frees. 2020-02-29 12:13:32 +00:00
unix Auxiliary application: 'psocks', a simple SOCKS server. 2020-02-23 16:36:27 +00:00
windows Auxiliary application: 'psocks', a simple SOCKS server. 2020-02-23 16:36:27 +00:00
.gitignore Auxiliary application: 'psocks', a simple SOCKS server. 2020-02-23 16:36:27 +00:00
agentf.c
aqsync.c
be_all_s.c New protocol: PROT_SSHCONN, bare ssh-connection. 2020-02-22 18:42:13 +00:00
be_all.c New protocol: PROT_SSHCONN, bare ssh-connection. 2020-02-22 18:42:13 +00:00
be_misc.c Formatting change to braces around one case of a switch. 2020-02-16 11:26:21 +00:00
be_none.c config.c: loop over backends list for protocol selector. 2020-02-22 18:27:56 +00:00
be_nos_s.c Centralise 'no random numbers' stubs into norand.c. 2020-02-07 19:17:19 +00:00
be_nossh.c Centralise 'no random numbers' stubs into norand.c. 2020-02-07 19:17:19 +00:00
be_ssh.c Permit protocol selection in file transfer tools. 2020-02-22 18:27:56 +00:00
Buildscr Switch to running cryptsuite.py under Python 3. 2020-02-28 20:40:08 +00:00
Buildscr.cv
callback.c Add lots of missing 'static' keywords. 2020-01-29 06:44:18 +00:00
cgtest.c Move the code for cgtest into cgtest.c. 2020-02-02 14:16:52 +00:00
CHECKLST.txt
clicons.c Remove FLAG_VERBOSE. 2020-01-30 06:40:21 +00:00
cmdgen.c cmdgen: document --dump in the online help. 2020-02-23 12:02:44 +00:00
cmdline.c Permit protocol selection in file transfer tools. 2020-02-22 18:27:56 +00:00
conf.c
config.c config.c: loop over backends list for protocol selector. 2020-02-22 18:27:56 +00:00
configure.ac
cproxy.c
defs.h Pageant client: functions to send reencryption requests. 2020-02-15 18:07:50 +00:00
dialog.c
dialog.h
ecc.c New query function ecc_montgomery_is_identity. 2020-02-28 20:40:08 +00:00
ecc.h New query function ecc_montgomery_is_identity. 2020-02-28 20:40:08 +00:00
errsock.c
fuzzterm.c Remove the GLOBAL macro itself. 2020-02-02 10:02:10 +00:00
import.c Formatting change to braces around one case of a switch. 2020-02-16 11:26:21 +00:00
LATEST.VER
ldisc.c
ldisc.h
LICENCE
licence.pl
logging.c Assorted benign warning fixes. 2020-01-29 06:44:18 +00:00
mainchan.c Assorted benign warning fixes. 2020-01-29 06:44:18 +00:00
marshal.c
marshal.h
memory.c
minibidi.c Formatting change to braces around one case of a switch. 2020-02-16 11:26:21 +00:00
misc.c Remove FLAG_INTERACTIVE. 2020-01-30 06:40:21 +00:00
misc.h cmdgen: add a --dump option. 2020-02-22 18:42:13 +00:00
miscucs.c
mkauto.sh
mkfiles.pl Enable -Werror on clang-cl builds. 2020-01-29 06:44:18 +00:00
mksrcarc.sh
mkunxarc.sh
mpint_i.h Start a file of 'unsafe' mp_int functions. 2020-02-23 14:49:54 +00:00
mpint.c mpint: add a gcd function. 2020-02-23 14:49:54 +00:00
mpint.h mpint: add a gcd function. 2020-02-23 14:49:54 +00:00
mpunsafe.c Start a file of 'unsafe' mp_int functions. 2020-02-23 14:49:54 +00:00
mpunsafe.h Start a file of 'unsafe' mp_int functions. 2020-02-23 14:49:54 +00:00
network.h Log when a network connection succeeds. 2020-02-07 19:18:50 +00:00
nocmdline.c Make cmdline_tooltype a const int. 2020-01-30 06:40:22 +00:00
nocproxy.c
nogss.c
noprint.c Make bufchain_prefix return a ptrlen. 2019-02-06 21:46:10 +00:00
norand.c Centralise 'no random numbers' stubs into norand.c. 2020-02-07 19:17:19 +00:00
noshare.c
noterm.c
notiming.c
nullplug.c Log when a network connection succeeds. 2020-02-07 19:18:50 +00:00
pageant.c Formatting change to braces around one case of a switch. 2020-02-16 11:26:21 +00:00
pageant.h Pageant client: functions to send reencryption requests. 2020-02-15 18:07:50 +00:00
pgssapi.c
pgssapi.h
pinger.c
portfwd.c Use 'true' and 'false' in sk_set_frozen calls. 2020-02-12 21:38:06 +00:00
pproxy.c
primecandidate.c Refactor generation of candidate integers in primegen. 2020-02-23 15:47:44 +00:00
proxy.c Formatting change to braces around one case of a switch. 2020-02-16 11:26:21 +00:00
proxy.h
pscp.c Fix a deadlock in SFTP upload. 2020-02-25 21:31:24 +00:00
psftp.c Fix a deadlock in SFTP upload. 2020-02-25 21:31:24 +00:00
psftp.h Remove FLAG_VERBOSE. 2020-01-30 06:40:21 +00:00
psftpcommon.c
psocks.c Auxiliary application: 'psocks', a simple SOCKS server. 2020-02-23 16:36:27 +00:00
psocks.h Auxiliary application: 'psocks', a simple SOCKS server. 2020-02-23 16:36:27 +00:00
putty.h New protocol: PROT_SSHCONN, bare ssh-connection. 2020-02-22 18:42:13 +00:00
puttymem.h
puttyps.h
raw.c Pass the BackendVtable pointer to backend_init. 2020-02-22 18:27:56 +00:00
README
Recipe Auxiliary application: 'psocks', a simple SOCKS server. 2020-02-23 16:36:27 +00:00
release.pl
resource.h
rlogin.c Pass the BackendVtable pointer to backend_init. 2020-02-22 18:27:56 +00:00
scpserver.c
sercfg.c config.c: loop over backends list for protocol selector. 2020-02-22 18:27:56 +00:00
sesschan.c Make the plug_log type code into an enum. 2020-02-07 19:17:45 +00:00
sessprep.c
settings.c Give BackendVtable separate id and displayname fields. 2020-02-22 18:27:56 +00:00
sftp.c
sftp.h
sftpcommon.c
sftpserver.c Fix two accidental overwrites of 'flags'. 2020-01-30 06:40:21 +00:00
sign.sh Whitespace rationalisation of entire code base. 2019-09-08 20:29:21 +01:00
smallprimes.c Move init_primes_array out into its own file. 2020-02-23 14:12:21 +00:00
ssh1bpp.c Track the total size of every PacketQueue. 2020-02-05 19:32:22 +00:00
ssh1censor.c
ssh1connection-client.c Formatting change to braces around one case of a switch. 2020-02-16 11:26:21 +00:00
ssh1connection-server.c Formatting change to braces around one case of a switch. 2020-02-16 11:26:21 +00:00
ssh1connection.c Account for packet queues in ssh_sendbuffer(). 2020-02-05 19:34:29 +00:00
ssh1connection.h New protocol: PROT_SSHCONN, bare ssh-connection. 2020-02-22 18:42:13 +00:00
ssh1login-server.c Account for packet queues in ssh_sendbuffer(). 2020-02-05 19:34:29 +00:00
ssh1login.c Account for packet queues in ssh_sendbuffer(). 2020-02-05 19:34:29 +00:00
ssh2bpp-bare.c Track the total size of every PacketQueue. 2020-02-05 19:32:22 +00:00
ssh2bpp.c Track the total size of every PacketQueue. 2020-02-05 19:32:22 +00:00
ssh2censor.c
ssh2connection-client.c New protocol: PROT_SSHCONN, bare ssh-connection. 2020-02-22 18:42:13 +00:00
ssh2connection-server.c
ssh2connection.c Formatting change to braces around one case of a switch. 2020-02-16 11:26:21 +00:00
ssh2connection.h New protocol: PROT_SSHCONN, bare ssh-connection. 2020-02-22 18:42:13 +00:00
ssh2kex-client.c Start a file of 'unsafe' mp_int functions. 2020-02-23 14:49:54 +00:00
ssh2kex-server.c
ssh2transhk.c
ssh2transport.c Account for packet queues in ssh_sendbuffer(). 2020-02-05 19:34:29 +00:00
ssh2transport.h
ssh2userauth-server.c Account for packet queues in ssh_sendbuffer(). 2020-02-05 19:34:29 +00:00
ssh2userauth.c Account for packet queues in ssh_sendbuffer(). 2020-02-05 19:34:29 +00:00
ssh.c New protocol: PROT_SSHCONN, bare ssh-connection. 2020-02-22 18:42:13 +00:00
ssh.h Move invent_firstbits() into sshrsag.c. 2020-02-23 15:47:44 +00:00
sshaes.c Fix typo in comment. 2020-02-26 08:35:17 +00:00
ssharcf.c
sshauxcrypt.c
sshbcrypt.c
sshblowf.c
sshblowf.h
sshbpp.h
sshccp.c
sshchan.h
sshcommon.c Move half of sshcommon.c out into sshutils.c. 2020-02-07 19:19:27 +00:00
sshcr.h Assorted benign warning fixes. 2020-01-29 06:44:18 +00:00
sshcrc.c
sshcrcda.c Add lots of missing 'static' keywords. 2020-01-29 06:44:18 +00:00
sshdes.c Add lots of missing 'static' keywords. 2020-01-29 06:44:18 +00:00
sshdh.c
sshdss.c cmdgen: add a --dump option. 2020-02-22 18:42:13 +00:00
sshdssg.c Refactor generation of candidate integers in primegen. 2020-02-23 15:47:44 +00:00
sshecc.c Add official kex name "curve25519-sha256". 2020-02-29 09:59:12 +00:00
sshecdsag.c
sshgss.h
sshgssc.c
sshgssc.h
sshhmac.c Add lots of missing 'static' keywords. 2020-01-29 06:44:18 +00:00
sshkeygen.h Refactor generation of candidate integers in primegen. 2020-02-23 15:47:44 +00:00
sshmac.c sshmac.c: remove excessive return statement 2019-01-02 22:50:08 +00:00
sshmd5.c Add lots of missing 'static' keywords. 2020-01-29 06:44:18 +00:00
sshnogss.c
sshppl.h Account for packet queues in ssh_sendbuffer(). 2020-02-05 19:34:29 +00:00
sshprime.c primegen: fix a small memory leak. 2020-02-23 18:34:18 +00:00
sshprng.c
sshpubk.c cmdgen: add a --dump option. 2020-02-22 18:42:13 +00:00
sshrand.c
sshrsa.c cmdgen: add a --dump option. 2020-02-22 18:42:13 +00:00
sshrsag.c RSA generation: change exponent to 2^16+1. 2020-02-23 15:47:44 +00:00
sshserver.c New application: 'psusan', the PROT_SSHCONN server end. 2020-02-22 18:42:13 +00:00
sshserver.h New application: 'psusan', the PROT_SSHCONN server end. 2020-02-22 18:42:13 +00:00
sshsh256.c
sshsh512.c Assorted benign warning fixes. 2020-01-29 06:44:18 +00:00
sshsha.c
sshshare.c New protocol: PROT_SSHCONN, bare ssh-connection. 2020-02-22 18:42:13 +00:00
sshsignals.h
sshttymodes.h
sshutils.c Move half of sshcommon.c out into sshutils.c. 2020-02-07 19:19:27 +00:00
sshverstring.c
sshzlib.c
storage.h
stripctrl.c
telnet.c Pass the BackendVtable pointer to backend_init. 2020-02-22 18:27:56 +00:00
terminal.c Formatting change to braces around one case of a switch. 2020-02-16 11:26:21 +00:00
terminal.h
testback.c Pass the BackendVtable pointer to backend_init. 2020-02-22 18:27:56 +00:00
testcrypt.c Refactor generation of candidate integers in primegen. 2020-02-23 15:47:44 +00:00
testcrypt.h Reject all low-order points in Montgomery key exchange. 2020-02-28 20:48:52 +00:00
testsc.c cmdgen: add a --dump option. 2020-02-22 18:42:13 +00:00
testzlib.c
time.c
timing.c
tree234.c
tree234.h
utils.c cmdgen: add a --dump option. 2020-02-22 18:42:13 +00:00
version.c
version.h
wcwidth.c
wildcard.c
x11fwd.c Make the plug_log type code into an enum. 2020-02-07 19:17:45 +00:00

This is the README for the source archive of PuTTY, a free Windows
and Unix Telnet and SSH client.

If you want to rebuild PuTTY from source, we provide a variety of
Makefiles and equivalents. (If you have fetched the source from
Git, you'll have to generate the Makefiles yourself -- see
below.)

There are various compile-time directives that you can use to
disable or modify certain features; it may be necessary to do this
in some environments. They are documented in `Recipe', and in
comments in many of the generated Makefiles.

For building on Windows:

 - windows/Makefile.vc is for command-line builds on MS Visual C++
   systems. Change into the `windows' subdirectory and type `nmake
   -f Makefile.vc' to build all the PuTTY binaries.

   As of 2017, we successfully compile PuTTY with both Visual Studio
   7 (2003) and Visual Studio 14 (2015), so our guess is that it will
   probably build with versions in between those as well.

   (The binaries from Visual Studio 14 are only compatible with
   Windows XP and up. Binaries from Visual Studio 7 ought to work
   with anything from Windows 95 onward.)

 - Inside the windows/MSVC subdirectory are MS Visual Studio project
   files for doing GUI-based builds of the various PuTTY utilities.
   These have been tested on Visual Studio 7 and 10.

   You should be able to build each PuTTY utility by loading the
   corresponding .dsp file in Visual Studio. For example,
   MSVC/putty/putty.dsp builds PuTTY itself, MSVC/plink/plink.dsp
   builds Plink, and so on.

 - windows/Makefile.mgw is for MinGW / Cygwin installations. Type
   `make -f Makefile.mgw' while in the `windows' subdirectory to
   build all the PuTTY binaries.

   MinGW and friends can lag behind other toolchains in their support
   for the Windows API. Compile-time levers are provided to exclude
   some features; the defaults are set appropriately for the
   'mingw-w64' cross-compiler provided with Ubuntu 14.04. If you are
   using an older toolchain, you may need to exclude more features;
   alternatively, you may find that upgrading to a recent version of
   the 'w32api' package helps.

 - windows/Makefile.lcc is for lcc-win32. Type `make -f
   Makefile.lcc' while in the `windows' subdirectory. (You will
   probably need to specify COMPAT=-DNO_MULTIMON.)

 - Inside the windows/DEVCPP subdirectory are Dev-C++ project
   files for doing GUI-based builds of the various PuTTY utilities.

The PuTTY team actively use Makefile.vc (with VC7/10) and Makefile.mgw
(with mingw32), so we'll probably notice problems with those
toolchains fairly quickly. Please report any problems with the other
toolchains mentioned above.

For building on Unix:

 - unix/configure is for Unix and GTK. If you don't have GTK, you
   should still be able to build the command-line utilities (PSCP,
   PSFTP, Plink, PuTTYgen) using this script. To use it, change into
   the `unix' subdirectory, run `./configure' and then `make'. Or you
   can do the same in the top-level directory (we provide a little
   wrapper that invokes configure one level down), which is more like
   a normal Unix source archive but doesn't do so well at keeping the
   per-platform stuff in each platform's subdirectory; it's up to you.

 - unix/Makefile.gtk and unix/Makefile.ux are for non-autoconfigured
   builds. These makefiles expect you to change into the `unix'
   subdirectory, then run `make -f Makefile.gtk' or `make -f
   Makefile.ux' respectively. Makefile.gtk builds all the programs but
   relies on Gtk, whereas Makefile.ux builds only the command-line
   utilities and has no Gtk dependence.

 - For the graphical utilities, any of Gtk+-1.2, Gtk+-2.0, and Gtk+-3.0
   should be supported. If you have more than one installed, you can
   manually specify which one you want by giving the option
   '--with-gtk=N' to the configure script where N is 1, 2, or 3.
   (The default is the newest available, of course.) In the absence
   of any Gtk version, the configure script will automatically
   construct a Makefile which builds only the command-line utilities;
   you can manually create this condition by giving configure the
   option '--without-gtk'.

 - pterm would like to be setuid or setgid, as appropriate, to permit
   it to write records of user logins to /var/run/utmp and
   /var/log/wtmp. (Of course it will not use this privilege for
   anything else, and in particular it will drop all privileges before
   starting up complex subsystems like GTK.) By default the makefile
   will not attempt to add privileges to the pterm executable at 'make
   install' time, but you can ask it to do so by running configure
   with the option '--enable-setuid=USER' or '--enable-setgid=GROUP'.

 - The Unix Makefiles have an `install' target. Note that by default
   it tries to install `man' pages; if you have fetched the source via
   Git then you will need to have built these using Halibut
   first - see below.

 - It's also possible to build the Windows version of PuTTY to run
   on Unix by using Winelib.  To do this, change to the `windows'
   directory and run `make -f Makefile.mgw CC=winegcc RC=wrc'.

All of the Makefiles are generated automatically from the file
`Recipe' by the Perl script `mkfiles.pl' (except for the Unix one,
which is generated by the `configure' script; mkfiles.pl only
generates the input to automake). Additions and corrections to Recipe,
mkfiles.pl and/or configure.ac are much more useful than additions and
corrections to the actual Makefiles, Makefile.am or Makefile.in.

The Unix `configure' script and its various requirements are generated
by the shell script `mkauto.sh', which requires GNU Autoconf, GNU
Automake, and Gtk; if you've got the source from Git rather
than using one of our source snapshots, you'll need to run this
yourself. The input file to Automake is generated by mkfiles.pl along
with all the rest of the makefiles, so you will need to run mkfiles.pl
and then mkauto.sh.

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.