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author Kim Alvefur <zash@zash.se>
date Sat, 07 Jan 2023 17:15:47 +0100
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93b12bfd7aa8 mod_auth_http: Yet another module to authenticate against a HTTP service
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1 ---
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2 labels:
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3 - Stage-Alpha
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4 summary: "Authenticate users against an external HTTP API"
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5 ...
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6
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7 # Overview
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8
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9 This authentication module allows Prosody to authenticate users against
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10 an external HTTP service.
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11
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12 # Configuration
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13
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14 ``` lua
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15 VirtualHost "example.com"
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16 authentication = "http"
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17 http_auth_url = "http://example.com/auth"
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18 ```
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19
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20 If the API requires Prosody to authenticate, you can provide static
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21 credentials using HTTP Basic authentication, like so:
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22
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23 ```
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24 http_auth_credentials = "prosody:secret-password"
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25 ```
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26
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27 # Developers
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28
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29 This section contains information for developers who wish to implement a
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30 HTTP service that Prosody can use for authentication.
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31
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32 ## Protocol
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33
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34 Prosody will make a HTTP request to the configured API URL with an
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35 appended `/METHOD` where `METHOD` is one of the methods described below.
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36
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37 GET methods must expect a series of URL-encoded query parameters, while
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38 POST requests will receive an URL-encoded form (i.e.
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39 `application/x-www-form-urlencoded`).
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40
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41 ## Parameters
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42
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43 user
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44 : The username, e.g. `stephanie` for the JID `stephanie@example.com`.
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45
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46 server
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47 : The host part of the user's JID, e.g. `example.com` for the JID
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48 `stephanie@example.com`.
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49
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50 pass
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51 : For methods that verify or set a user's password, the password will
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52 be supplied in this parameter, otherwise it is not set.
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53
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54 ## Methods
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55
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56 The only mandatory methods that the service must implement are `check_password`
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57 and `user_exists`. Unsupported methods should return a HTTP status code
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58 of `501 Not Implemented`, but other error codes will also be handled by
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59 Prosody.
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60
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61 Method HTTP method Success codes Error codes Response
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62 -------- ---- --- ----------------- -----------------------------------------------------------------
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63 register POST 201 409 (user exists)
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64 check\_password GET 200 A text string of `true` if the user exists, or `false` otherwise.
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65 user\_exists GET 200 A text string of `true` if the user exists, or `false` otherwise.
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66 set\_password POST 200, 201 or 204
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67 remove\_user POST 200, 201 or 204
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68
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69 ## Examples
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70
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71 With the following configuration:
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72
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73 ```
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74 authentication = "http"
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75 http_auth_url = "https://auth.example.net/api"
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76
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77 If a user connects and tries to log in to Prosody as "romeo@example.net"
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78 with the password "iheartjuliet", Prosody would make the following HTTP
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79 request:
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80
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81 ```
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82 https://auth.example.net/api/check_password?user=romeo&server=example.net&pass=iheartjuliet
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83 ```
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84
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85 # Compatibility
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86
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87 Requires Prosody 0.11.0 or later.