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annotate mod_auth_external_insecure/README.markdown @ 4884:960afcbc1ead
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| author | Kim Alvefur <zash@zash.se> |
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| date | Sat, 05 Feb 2022 01:09:35 +0100 |
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1 --- |
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2 labels: |
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3 - 'Stage-Deprecated' |
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4 - 'Type-Auth' |
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5 summary: 'Authentication via external script/process (DEPRECATED)' |
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6 ... |
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8 Introduction |
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9 ============ |
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| 11 Allow client authentication to be handled by an external script/process. | |
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13 :::{.alert .alert-warning} |
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14 **Warning:** This module is not currently maintained, and may be buggy and insecure in |
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15 certain configurations/environments. It is **not** recommended for production use. Please |
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16 use one of the [many other authentication modules](/type_auth). |
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17 ::: |
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18 |
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19 Installation |
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20 ============ |
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22 mod\_auth\_external\_insecure depends on a Lua module called |
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23 [lpty](http://www.tset.de/lpty/). You can install it on many platforms |
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24 using [LuaRocks](http://luarocks.org/), for example: |
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25 |
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26 sudo luarocks install lpty |
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28 Configuration |
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29 ============= |
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31 As with all auth modules, there is no need to add this to |
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32 modules\_enabled. Simply add in the global section, or for the relevant |
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33 hosts: |
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35 authentication = "external_insecure" |
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36 |
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37 These options are specific to mod\_auth\_external\_insecure: |
| 1782 | 38 |
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39 -------------------------- ------------------------------------------------------------------------------------------------------------------------- |
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40 external\_auth\_protocol May be "generic" or "ejabberd" (the latter for compatibility with ejabberd external auth scripts. Default is "generic". |
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41 external\_auth\_command The command/script to execute. |
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42 -------------------------- ------------------------------------------------------------------------------------------------------------------------- |
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43 |
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44 Two other options are also available, depending on whether the module is |
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45 running in 'blocking' or 'non-blocking' mode: |
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47 --------------------------- -------------- ------------------------------------------------------------------------------------------------------------------ |
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48 external\_auth\_timeout blocking The number of seconds to wait for a response from the auth process. Default is 5. |
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49 external\_auth\_processes non-blocking The number of concurrent processes to spawn. Default is 1, increase to handle high connection rates efficiently. |
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50 --------------------------- -------------- ------------------------------------------------------------------------------------------------------------------ |
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52 Blocking vs non-blocking |
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53 ------------------------ |
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55 Non-blocking mode is experimental and is disabled by default. |
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56 |
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57 Enable at your own risk if you fulfil these conditions: |
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59 - Running Prosody trunk ([nightly](http://prosody.im/nightly/) build |
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60 414+) or Prosody 0.11.x. |
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61 - [libevent](http://prosody.im/doc/libevent) is enabled in the config, |
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62 and LuaEvent is available. |
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63 - lpty (see installation above) is version 1.0.1 or later. |
| 1782 | 64 |
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65 ```lua |
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66 external_auth_blocking = false; |
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67 ``` |
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68 |
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69 Protocol |
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70 ======== |
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| 72 Prosody executes the given command/script, and sends it queries. | |
| 73 | |
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74 Your auth script should simply read a line from standard input, and |
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75 write the result to standard output. It must do this in a loop, until |
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76 there's nothing left to read. Prosody can keep sending more lines to the |
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77 script, with a command on each line. |
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79 Each command is one line, and the response is expected to be a single |
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80 line containing "0" for failure or "1" for success. Your script must |
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81 respond with "0" for anything it doesn't understand. |
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| 83 There are three commands used at the moment: | |
| 84 | |
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85 auth |
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86 ---- |
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87 |
| 1782 | 88 Check if a user's password is valid. |
| 89 | |
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90 Example: `auth:username:example.com:abc123` |
| 1782 | 91 |
| 92 Note: The password can contain colons. Make sure to handle that. | |
| 93 | |
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94 isuser |
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95 ------ |
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96 |
| 1782 | 97 Check if a user exists. |
| 98 | |
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99 Example: `isuser:username:example.com` |
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101 setpass |
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102 ------- |
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103 |
| 1782 | 104 Set a new password for the user. Implementing this is optional. |
| 105 | |
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106 Example: `setpass:username:example.com:abc123` |
| 1782 | 107 |
| 108 Note: The password can contain colons. Make sure to handle that. | |
| 109 | |
| 2876 | 110 ejabberd compatibility |
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111 --------------------- |
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112 |
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113 ejabberd implements a similar protocol. The main difference is that |
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114 Prosody's protocol is line-based, while ejabberd's is length-prefixed. |
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| 116 Add this to your config if you need to use an ejabberd auth script: | |
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117 |
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118 external_auth_protocol = "ejabberd" |
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120 Compatibility |
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121 ============= |
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122 |
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123 ----- ------- |
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124 0.8 Works |
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125 0.9 Works |
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126 ----- ------- |