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dirmngr: Switch to an onion address if Tor is running.

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* dirmngr/dirmngr.h (opt): Turn field 'keyserver' into an strlist.
* dirmngr/dirmngr.c (parse_rereadable_options): Allow multiple
--keyserver options.
* dirmngr/server.c (server_local_s): Add field 'tor_state'.
(release_uri_item_list): New.
(release_ctrl_keyservers): Use it.
(start_command_handler): Release list of keyservers.
(is_tor_running): New.
(cmd_getinfo): Re-implement "tor" subcommand using new fucntion.
(ensure_keyserver): Rewrite.
* g10/dirmngr-conf.skel: Add two keyserver options.
--

This feature is independent of --use-tor and automagically uses Tor if
available.  The dirmngr.conf file needs to specify two keyservers to
make this work.  For new installations this is done using the skeleton
file.  This feature requires the Libassuan 2.4.2 to work.

This patch also fixes a memory leak of opt.keyserver en passant.

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2015-12-02 11:49:41 +01:00
parent 17ac843871
commit 28e2513721
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GPG key ID: E3FDFF218E45B72B
5 changed files with 132 additions and 31 deletions
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5
doc/dirmngr.texi
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@ -263,6 +263,11 @@ need to send keys to more than one server. The keyserver
@code{hkp://keys.gnupg.net} uses round robin DNS to give a different
keyserver each time you use it.
If exactly two keyservers are configured and only one is a Tor hidden
service (.onion), Dirmngr selects the keyserver to use depending on
whether Tor is locally running or not. The check for a running Tor is
done for each new connection.
@item --nameserver @var{ipaddr}
@opindex nameserver