Mercurial > prosody-modules
view mod_auth_external/README.markdown @ 3386:a76c420eca61
mod_e2e_policy: Fix an error with getting stanza from event
author | Michel Le Bihan <michel@lebihan.pl> |
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date | Fri, 30 Nov 2018 19:31:25 +0100 |
parents | ea6b5321db50 |
children | 788200f5f481 |
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--- labels: - 'Stage-Alpha' - 'Type-Auth' summary: 'Authentication via external script/process' ... Introduction ============ Allow client authentication to be handled by an external script/process. Installation ============ mod\_auth\_external depends on a Lua module called [lpty](http://www.tset.de/lpty/). You can install it on many platforms using [LuaRocks](http://luarocks.org/), for example: sudo luarocks install lpty Note: Earlier versions of the module did not depend on lpty. While using the newer version is strongly recommended, you can find the [older version here](https://hg.prosody.im/prosody-modules/raw-file/50ee38e95e75/mod_auth_external/mod_auth_external.lua) if you need it (revision of the repository). Configuration ============= As with all auth modules, there is no need to add this to modules\_enabled. Simply add in the global section, or for the relevant hosts: authentication = "external" These options are specific to mod\_auth\_external: -------------------------- ------------------------------------------------------------------------------------------------------------------------- external\_auth\_protocol May be "generic" or "ejabberd" (the latter for compatibility with ejabberd external auth scripts. Default is "generic". external\_auth\_command The command/script to execute. -------------------------- ------------------------------------------------------------------------------------------------------------------------- Two other options are also available, depending on whether the module is running in 'blocking' or 'non-blocking' mode: --------------------------- -------------- ------------------------------------------------------------------------------------------------------------------ external\_auth\_timeout blocking The number of seconds to wait for a response from the auth process. Default is 5. external\_auth\_processes non-blocking The number of concurrent processes to spawn. Default is 1, increase to handle high connection rates efficiently. --------------------------- -------------- ------------------------------------------------------------------------------------------------------------------ Blocking vs non-blocking ------------------------ Non-blocking mode is automatically activated when: - Running Prosody trunk ([nightly](http://prosody.im/nightly/) build 414+). - [libevent](http://prosody.im/doc/libevent) is enabled in the config, and LuaEvent is available. - lpty (see installation above) is version 1.0.1 or later. Protocol ======== Prosody executes the given command/script, and sends it queries. Your auth script should simply read a line from standard input, and write the result to standard output. It must do this in a loop, until there's nothing left to read. Prosody can keep sending more lines to the script, with a command on each line. Each command is one line, and the response is expected to be a single line containing "0" for failure or "1" for success. Your script must respond with "0" for anything it doesn't understand. There are three commands used at the moment: auth ---- Check if a user's password is valid. Example: `auth:username:example.com:abc123` Note: The password can contain colons. Make sure to handle that. isuser ------ Check if a user exists. Example: `isuser:username:example.com` setpass ------- Set a new password for the user. Implementing this is optional. Example: `setpass:username:example.com:abc123` Note: The password can contain colons. Make sure to handle that. ejabberd compatibility --------------------- ejabberd implements a similar protocol. The main difference is that Prosody's protocol is line-based, while ejabberd's is length-prefixed. Add this to your config if you need to use an ejabberd auth script: external_auth_protocol = "ejabberd" Compatibility ============= ----- ------- 0.8 Works 0.9 Works ----- -------