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annotate mod_auth_external_insecure/README.markdown @ 5766:b8a2b3ebe792

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mod_http_oauth2: Return validation output added in trunk rev 72d7830505f0 It's not fun at all to try to register a client and only get back "failed schema validation", this should help with that.
author Kim Alvefur <zash@zash.se>
date Sun, 03 Dec 2023 23:44:18 +0100
parents 8e58a1b78336
children
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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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56
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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 ----- -------