Allow marking options as ignored.

* jnlib/argparse.h (ARGPARSE_OPT_IGNORE): New.
(ARGPARSE_TYPE_MASK): New, for internal use.
(ARGPARSE_ignore): New.
* jnlib/argparse.c (optfile_parse, arg_parse): Replace remaining
constants by macros.
(optfile_parse): Implement ARGPARSE_OPT_IGNORE.
(arg_parse): Exclide ignore options from --dump-options.
--

In addition to the ignore-invalid-option (commit 41d56433) it is often
useful to mark options in a configuration which as NOP.  For example
options which have no more function at all but can be expected to be
found in existing conf files.  Such an option (or command) may now be
given as

  ARGPARSE_ignore (300, "obsolete-option")

The 300 is merely used as a non-valid single option name much like
group names or the 500+n values used for long options.

Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 54c54e2824aab5716a187bbbf6dff8860d6a6056)

Resolved conflicts:
	common/argparse.c: Fixed.
Ignore obsolete option --disable-keypad.

* scd/scdaemon.c (opts): Ignore --disable-keypad.
--

The renaming of --disable-keypad to --disable-pinpad might mess up
configuration files managed with a GUI.  The GUI does not not anymore
know about the old option and would allow the user to switch
"disable-pinpad" on.  However, a "disable-keypad" might still linger
in the conf file with gpgconf not knowing about it.  Thus the conf
file would always be rejected and manual intervention would be
required.  Ignoring the old option nicely solves the problem.

(cherry picked from commit e24e92d7e244edd578c0c1f0fba6e0070cb5f104)
Fix syntax error for building on APPLE.

* scd/pcsc-wrapper.c [__APPLE__]: Fix syntax error.
--

For W32 and probably for Cygwin we don't need the wrapper, thus the
problems does not exhibit itself.

(cherry picked from commit 8ddf604659b93754ffa6dea295678a8adc293f90)
agent: Fix binary vs. text mode problem in ssh.

* agent/command-ssh.c (file_to_buffer)
(ssh_handler_request_identities): Open streams in binary mode.
(start_command_handler_ssh): Factor some code out to ..
(setup_ssh_env): new function.
--

This is for now a theoretical fix because there is no ssh client yet
which uses the GnuPG style IPC.  OpenSSL for Cygwin uses only a quite
similar one.  gniibe suggested to implement that IPC style in
Libassuan so that a Cygwin version of OpenSSL may be used with GnuPG.

Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit ed056d67c7c93306b68829f83a2565e978dcfd9b)

Also fixed one typo.
ssh: Add support for Putty.

* agent/gpg-agent.c [W32]: Include Several Windows header.
(opts): Change help text for enable-ssh-support.
(opts, main): Add option --enable-putty-support
(putty_support, PUTTY_IPC_MAGIC, PUTTY_IPC_MAXLEN): New for W32.
(agent_init_default_ctrl): Add and asssert call.
(putty_message_proc, putty_message_thread): New.
(handle_connections) [W32]: Start putty message thread.
* common/sysutils.c (w32_get_user_sid): New for W32 only
* tools/gpgconf-comp.c (gc_options_gpg_agent): Add
--enable-ssh-support and --enable-putty-support.  Make the
configuration group visible at basic level.
* agent/command-ssh.c (serve_mmapped_ssh_request): New for W32 only.
--

This patch enables support for Putty.  It has been tested with Putty
0.62 using an Unix created ssh key copied to the private-keys-v1.d
directory on Windows and with a manually crafted sshcontrol file.  It
also works with a smartcard key.

May thanks to gniibe who implemented a proxy in Python to test the
putty/gpg-agent communication.

Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 9f32499f99a0817f63f7a73b09bdcebe60d4775d)

Resolved conflicts:
	NEWS
	agent/agent.h
	agent/gpg-agent.c: Convert from pth to npth.
	common/sysutils.c
	common/sysutils.h
agent: Make --allow-mark-trusted the default.

* agent/gpg-agent.c (opts, main): Add option --no-allow-mark-trusted.
Put this option into the gpgconf-list.
(main): Enable opt.allow_mark_trusted by default.
* tools/gpgconf-comp.c (gc_options_gpg_agent): Replace
allow-mark-trusted by no-allow-mark-trusted.

* agent/trustlist.c (agent_marktrusted): Always set the "relax" flag.

--

These changes have been in effect for the Gpg4win Windows version
since 2011-01-24 and thus first released with Gpg4win 2.1.0.  Given
the current state of PKIX it does not make any sense to lure the Unix
user into false security by making it harder to trust self-signed or
CAcert certificates.

Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 90b419f3e9d05e509348d047e05fcc79e87be6cf)

Resolved conflicts:
	NEWS
	agent/gpg-agent.c
w32: Remove unused code.

* jnlib/w32-reg.c (write_w32_registry_string): Remove.
w32: Define WINVER only if needed.

* common/sysutils.c (WINVER): Define only if less that 5.0.
gpg: Remove legacy keyserver examples from the template conf file.

* g10/options.skel: Update.

(cherry picked from commit f3c5cc8bcd37e38b5d65db6a50466e22d03d1f0c)
Improve libcurl detection.

* m4/libcurl.m4: Do not use AC_PATH_PROG if --with-libcurl as been
given.  Suggested by John Marshall.
--

GnuPG-bug-id: 1510
(cherry picked from commit 110b52fffa77b339e6d59eba939408f7e87e7138)
gpgv: Init Libgcrypt to avoid syslog warning.

* g10/gpgv.c (main): Check libgcrypt version and disable secure
memory.
--

GnuPG-bug-id: 1376
Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 3966eb244518d5612385d35a5149f7164a9fb707)

Resolved conflicts:
	g10/gpgv.c
agent: Fix UPDATESTARTUPTTY for ssh.

* agent/command-ssh.c (setup_ssh_env): Fix env setting.
--

gniibe reported this to gnupg-devel on 2012-07-04:

  [...]
  (2) UPDATESTARTUPTTY doesn't work to switch TTY for pinentry for
      SSH.

  [...]

  Current implementation:

      In the function start_command_handler_ssh, the logic puts
      priority on ctrl->session_env which is initialized by
      agent_init_default_ctrl.  There are always GPG_TTY and TERM
      defined, because lines around 968 in gpg-agent.c, it says:

  	/* Make sure that we have a default ttyname. */

      While UPDATESTARTUPTTY updates opt.startup_env, it doesn't
      affect at all.

  Here is a patch to point the issue.  Tested and works for me.

Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 9f5578c29adba6d4f7d3650121d07322c2f8d254)
gpg: Protect against rogue keyservers sending secret keys.

* g10/options.h (IMPORT_NO_SECKEY): New.
* g10/keyserver.c (keyserver_spawn, keyserver_import_cert): Set new
flag.
* g10/import.c (import_secret_one): Deny import if flag is set.
--

By modifying a keyserver or a DNS record to send a secret key, an
attacker could trick a user into signing using a different key and
user id.  The trust model should protect against such rogue keys but
we better make sure that secret keys are never received from remote
sources.

Suggested-by: Stefan Tomanek
Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit e7abed3448c1c1a4e756c12f95b665b517d22ebe)

Resolved conflicts:
	g10/import.c
	g10/keyserver.c
gpg: Print a "not found" message for an unknown key in --key-edit.

* g10/keyedit.c (keyedit_menu): Print message.
--

GnuPG-bug-id: 1420
Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 0bf54e60d31389812d05c3fd29bece876204561d)

Resolved conflicts:
	g10/keyedit.c: Fix white spaces
gpg: Do not require a trustdb with --always-trust.

* g10/tdbio.c (tdbio_set_dbname): Add arg R_NOFILE.
* g10/trustdb.c (trustdb_args): Add field no_trustdb.
(init_trustdb): Set that field.
(revalidation_mark):  Take care of a nonexistent trustdb file.
(read_trust_options): Ditto.
(tdb_get_ownertrust): Ditto.
(tdb_get_min_ownertrust): Ditto.
(tdb_update_ownertrust): Ditto.
(update_min_ownertrust): Ditto.
(tdb_clear_ownertrusts): Ditto.
(tdb_cache_disabled_value): Ditto.
(tdb_check_trustdb_stale): Ditto.
(tdb_get_validity_core): Ditto.
* g10/gpg.c (main): Do not create a trustdb with most commands for
trust-model always.
--

This slightly changes the semantics of most commands in that they
won't create a trustdb if --trust-model=always is used.  It just does
not make sense to create a trustdb if there is no need for it.

Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 1a0eeaacd1bf09fe5125dbc3f56016bc20f3512e)

Resolved conflicts:
	NEWS
	g10/trustdb.c: Manually apply changes due to changed
                       function names.

Note that this also includes the fix for clear_ownertrust, see
GnuPG-bug-id: 1622.
common: Fix build problem with Sun Studio compiler.

* common/estream.c (ESTREAM_MUTEX_UNLOCK): Use int dummy dummy
functions.
(ESTREAM_MUTEX_INITIALIZE): Ditto.
--

GnuPG-bug-id: 1566
Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 571bcd4662a351cfa55bbf1a79ed1bc26da5780f)

Reolved conflicts:
	common/estream.c

Warning: estream.c still uses pth_mutex_* which is definitely wrong.
         Needs to be investigated.
gl: Avoid warning about shadowing an arg.

* gl/setenv.c (KNOWN_VALUE): s/value/_v/.
w32: Include winsock2.h to silence warnings.
Silence several warnings when building under Windows.

* agent/call-scd.c (start_scd): Replace int by assuan_fd_t.
(start_pinentry): Ditto.
* common/asshelp.c (start_new_gpg_agent): Replace int by assuan_fd_t.
* common/dotlock.c (GNUPG_MAJOR_VERSION): Include stringhelp.h for
prototypes on Windows and some other platforms.
* common/logging.c (fun_writer): Declare addrbuf only if needed.
* g10/decrypt.c (decrypt_message_fd) [W32]: Return not_implemented.
* g10/encrypt.c (encrypt_crypt) [W32]: Return error if used in server
mode.
* g10/dearmor.c (dearmor_file, enarmor_file): Replace GNUPG_INVALID_FD
by -1 as temporary hack for Windows.
* g10/export.c (do_export): Ditto.
* g10/revoke.c (gen_desig_revoke, gen_revoke): Ditto.
* g10/sign.c (sign_file, clearsign_file, sign_symencrypt_file): Ditto.
* g10/server.c (cmd_verify, gpg_server) [W32]: Return an error.
--

The gpg server mode is not actual working and thus we can avoid the
warnings by explicitly disabling the mode.  We keep it working under
Unix, though.
w32: Fix a potential problem in gpgconf's gettext.

* tools/gpgconf-comp.c (my_dgettext) [USE_SIMPLE_GETTEXT]: Make sure
to return something even DOMAIN is not given.