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FAQ: add two entries concerning 'sslcacertfile'

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Add a FAQ entry about non-verifying SSL certificates by default,
and another about how to generate a certificates file to feed to
the 'sslcacertfile' repository configuration item.

Signed-off-by: Daniel Shahaf <d.s@daniel.shahaf.name>
Signed-off-by: Nicolas Sebrecht <nicolas.s-dev@laposte.net>
This commit is contained in:
Daniel Shahaf 2011-05-08 22:55:55 +03:00 committed by Nicolas Sebrecht
parent 40900dcfb6
commit 632f1fe61f
1 changed files with 28 additions and 0 deletions
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docs/FAQ.rst
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@ -22,6 +22,7 @@ Please feel free to ask questions and/or provide answers; send email to the
.. _mailing list: http://lists.alioth.debian.org/mailman/listinfo/offlineimap-project
.. _OfflineIMAP: https://github.com/nicolas33/offlineimap
.. _ssl.wrap_socket: http://docs.python.org/library/ssl.html#ssl.wrap_socket
OfflineIMAP
@ -252,6 +253,33 @@ What is the mailbox name recorder (mbnames) for?
Some mail readers, such as mutt, are not capable of automatically determining the names of your mailboxes. OfflineIMAP can help these programs by writing the names of the folders in a format you specify. See the example offlineimap.conf for details.
Does OfflineIMAP verify SSL certificates?
-----------------------------------------
By default, no. However, as of version 6.3.2, it is possible to enforce verification
of SSL certificate on a per-repository basis by setting the `sslcacertfile` option in the
config file. (See the example offlineimap.conf for details.)
How do I generate an `sslcacertfile` file?
------------------------------------------
The `sslcacertfile` file must contain an SSL certificate (or a concatenated
certificates chain) in PEM format. (See the documentation of
`ssl.wrap_socket`_'s `certfile` parameter for the gory details.) The following
command should generate a file in the proper format::
openssl s_client -CApath /etc/ssl/certs -connect ${hostname}:imaps -showcerts \
| perl -ne 'print if /BEGIN/../END/; print STDERR if /return/' > $sslcacertfile
^D
Before using the resulting file, ensure that openssl verified the certificate
successfully.
The path `/etc/ssl/certs` is not standardized; your system may store
SSL certificates elsewhere. (On some systems it may be in
`/usr/local/share/certs/`.)
IMAP Server Notes
=================