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mod_auth_external_insecure/README.markdown

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mod_auth_external_insecure/README.markdown @ 4941:e7b9bc629ecc

mod_rest: Add special handling to catch MAM results from remote hosts Makes MAM queries to remote hosts works. As the comment says, MAM results from users' local archives or local MUCs are returned via origin.send() which is provided in the event and thus already worked. Results from remote hosts go via normal stanza routing and events, which need this extra handling to catch. This pattern of iq-set, message+, iq-result is generally limited to MAM. Closest similar thing might be MUC join, but to really handle that you would need the webhook callback mechanism.
author Kim Alvefur <zash@zash.se>
date Mon, 16 May 2022 19:47:09 +0200
parent 4558:8e58a1b78336
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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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7
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8 Introduction
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9 ============
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10
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11 Allow client authentication to be handled by an external script/process.
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12
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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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21
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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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27
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28 Configuration
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29 =============
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30
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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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34
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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:
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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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51
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52 Blocking vs non-blocking
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53 ------------------------
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54
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55 Non-blocking mode is experimental and is disabled by default.
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57 Enable at your own risk if you fulfil these conditions:
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58
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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.
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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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71
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72 Prosody executes the given command/script, and sends it queries.
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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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78
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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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82
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83 There are three commands used at the moment:
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84
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85 auth
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86 ----
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87
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88 Check if a user's password is valid.
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89
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90 Example: `auth:username:example.com:abc123`
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91
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92 Note: The password can contain colons. Make sure to handle that.
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93
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94 isuser
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95 ------
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96
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97 Check if a user exists.
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98
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99 Example: `isuser:username:example.com`
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100
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101 setpass
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102 -------
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103
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104 Set a new password for the user. Implementing this is optional.
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105
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106 Example: `setpass:username:example.com:abc123`
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107
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108 Note: The password can contain colons. Make sure to handle that.
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109
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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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115
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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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119
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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 ----- -------