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  • Committer: Teddy Hogeborn
  • Date: 2014-06-22 02:19:30 UTC
  • mto: (237.7.272 trunk)
  • mto: This revision was merged to the branch mainline in revision 317.
  • Revision ID: teddy@recompile.se-20140622021930-icl7h4cm97blhjml
mandos-keygen: Generate "checker" option to use SSH fingerprints.

To turn this off, use a new "--no-ssh" option to mandos-keygen.

* INSTALL (Mandos Server, Mandos Client): Document new suggested
                                          installation of SSH.
* Makefile (confdir/clients.conf): Use new "--no-ssh" option to
                                   "mandos-keygen".
* debian/control (mandos/Depends): Changed to "fping | ssh-client".
  (mandos-client/Recommends): New; set to "ssh".
* intro.xml (FREQUENTLY ASKED QUESTIONS): Rename and rewrite section
                                          called "Faking ping
                                          replies?" to address new
                                          default behavior.
* mandos-clients.conf.xml (OPTIONS/checker): Briefly discuss new
                                             behavior of
                                             mandos-keygen.
* mandos-keygen: Bug fix: Suppress failure output of "shred" to remove
                 "sec*", since no such files may exist.
 (password mode): Scan for SSH key fingerprints and output as new
                  "checker" and "ssh_fingerprint" options, unless new
                  "--no-ssh" option is given.
* mandos-keygen.xml (SYNOPSIS/--force): Bug fix: Document short form.
  (OPTIONS/--no-ssh): New.
  (SEE ALSO): Add reference "ssh-keyscan(1)".
* plugins.d/mandos-client.xml (SECURITY): Briefly mention the
                                          possibility of using SSH key
                                          fingerprints for checking.

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Lines of Context:
network-protocol.txt
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The Mandos server announces itself as a Zeroconf service of type
2
 
"_mandos._tcp". The Mandos client sends a line of text where the first
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whitespace-separated field is the protocol version, which currently is
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"1".  The client and server then start a TLS protocol handshake with a
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slight quirk: the Mandos server program acts as a TLS "client" while
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the connecting Mandos client acts as a TLS "server".  The Mandos
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client must supply an OpenPGP certificate, and the fingerprint of this
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certificate is used by the Mandos server to look up (in a list read
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from a file at start time) which binary blob to give the client.  No
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other authentication or authorization is done by the server.
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| Mandos Client                              |     | Mandos Server |
13
 
|--------------------------------------------+-----+---------------|
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| Connect                                    |     |               |
15
 
| "1\r\n"                                    | ->  |               |
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| TLS handshake                              | <-> | TLS handshake |
17
 
| OpenPGP public key (part of TLS handshake) | ->  |               |
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|                                            | <-  | Binary blob   |
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|                                            |     | Close         |