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annotate mod_auth_oauth_external/README.md @ 5345:3390bb2f9f6c

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mod_auth_oauth_external: Support PLAIN via resource owner password grant Might not be supported by the backend but PLAIN is the lowest common denominator, so not having it would lock out a lot of clients.
author Kim Alvefur <zash@zash.se>
date Thu, 16 Mar 2023 12:45:52 +0100
parents 0a6d2b79a8bf
children d9bc8712a745
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1 ---
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2 summary: Authenticate against an external OAuth 2 IdP
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3 labels:
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4 - Stage-Alpha
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5 ---
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6
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7 This module provides external authentication via an external [AOuth
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8 2](https://datatracker.ietf.org/doc/html/rfc7628) authorization server
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9 and supports the [SASL OAUTHBEARER authentication][rfc7628]
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10 mechanism as well as PLAIN for legacy clients (this is all of them).
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11
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12 # How it works
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13
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14 Clients retrieve tokens somehow, then show them to Prosody, which asks
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15 the Authorization server to validate them, returning info about the user
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16 back to Prosody.
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17
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18 Alternatively for legacy clients, Prosody receives the users username
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19 and password and retrieves a token itself, then proceeds as above.
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20
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21 # Configuration
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22
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23 `oauth_external_discovery_url`
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24 : Optional URL string pointing to [OAuth 2.0 Authorization Server
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25 Metadata](https://oauth.net/2/authorization-server-metadata/). Lets
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26 clients discover where they should retrieve access tokens from if
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27 they don't have one yet.
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28
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29 `oauth_external_validation_endpoint`
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30 : URL string. The token validation endpoint, should validate the token
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31 and return a JSON structure containing the username of the user
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32 logging in the field specified by `oauth_external_username_field`.
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33 Commonly the [OpenID `UserInfo`
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34 endpoint](https://openid.net/specs/openid-connect-core-1_0.html#UserInfo)
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35
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36 `oauth_external_username_field`
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37 : String. Default is `"preferred_username"`. Field in the JSON
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38 structure returned by the validation endpoint that contains the XMPP
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39 localpart.
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40
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41 ## For SASL PLAIN
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42
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43 `oauth_external_resource_owner_password`
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44 : Boolean. Defaults to `true`. Whether to allow the *insecure*
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45 resource owner password grant and SASL PLAIN.
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46
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47 `oauth_external_token_endpoint`
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48 : URL string. OAuth 2 [Token
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49 Endpoint](https://www.rfc-editor.org/rfc/rfc6749#section-3.2) used
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50 to retrieve token in order to then retrieve the username.
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51
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52 `oauth_external_client_id`
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53 : String. Client ID used to identify Prosody during the resource owner
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54 password grant.
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55
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56 # Compatibility
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57
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58 Version Status
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59 --------- ---------------
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60 trunk works
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61 0.12.x does not work
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62 0.11.x does not work