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  • Committer: Teddy Hogeborn
  • Date: 2019-03-31 04:39:25 UTC
  • mto: This revision was merged to the branch mainline in revision 382.
  • Revision ID: teddy@recompile.se-20190331043925-0j9pdspo3hux5nka
mandos-ctl: Refactor: Move command list generation into argparse

* mandos-ctl (add_command_line_options): Don't simply set flags for
                                         each option; instead, add
                                         command objects to a
                                         "commands" list.
  (check_option_syntax): Rework to deal with an already-generated
                         command list.
  (commands_from_options): Remove all code to generate command list,
                           but add more code to move command.Deny
                           ahead of command.Remove in command list.
  (command.PropertySetterValue.argparse): New; used in
                                          add_command_line_options.
  (Test_check_option_syntax): Refactor to pass actual string arguments
                              to parse_args() instead of modifying an
                              argparse.Namespace.

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Lines of Context:
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The Mandos server announces itself as a Zeroconf service of type
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"_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 |
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|--------------------------------------------+-----+---------------|
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| Connect                                    |     |               |
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| "1\r\n"                                    | ->  |               |
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| TLS handshake                              | <-> | TLS handshake |
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| OpenPGP public key (part of TLS handshake) | ->  |               |
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|                                            | <-  | Binary blob   |
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|                                            |     | Close         |