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92 lines
4.1 KiB
Markdown
92 lines
4.1 KiB
Markdown
# Identity server
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Issue: #607
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PR: #1354
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## Introduction
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Identity servers support contact discovery on Matrix by letting people look up Third Party Identifiers to see if the owner has publicly linked them with their Matrix ID.
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## Implementation
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The current implementation was Inspired by the code from Riot-Android.
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Difference though (list not exhaustive):
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- Only API v2 is supported (see https://matrix.org/docs/spec/identity_service/latest)
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- Homeserver has to be up to date to support binding (Versions.isLoginAndRegistrationSupportedBySdk() has to return true)
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- The SDK managed the session and client secret when binding ThreePid. Those data are not exposed to the client.
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- The SDK supports incremental sendAttempt (this is not used by Element)
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- The "Continue" button is now under the information, and not as the same place that the checkbox
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- The app can cancel a binding. Current data are erased from DB.
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- The API (IdentityService) is improved.
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- A new DB to store data related to the identity server management.
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Missing features (list not exhaustive):
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- Invite by 3Pid (will be in a dedicated PR)
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- Add email or phone to account (not P1, can be done on Element-Web)
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- List email and phone of the account (could be done in a dedicated PR)
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- Search contact (not P1)
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- Logout from identity server when user sign out or deactivate his account.
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## Related MSCs
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The list can be found here: https://matrix.org/blog/2019/09/27/privacy-improvements-in-synapse-1-4-and-riot-1-4
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## Steps and requirements
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- Only one identity server by account can be set. The user's choice is stored in account data with key `m.identity_server`. But every clients will managed its own token to log in to the identity server
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```json
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{
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"type": "m.identity_server",
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"content": {
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"base_url": "https://matrix.org"
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}
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}
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```
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- The accepted terms are stored in the account data:
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```json
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{
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"type": "m.accepted_terms",
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"content": {
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"accepted": [
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"https://vector.im/identity-server-privacy-notice-1"
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]
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}
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}
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```
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- Default identity server URL, from Wellknown data is proposed to the user.
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- Identity server can be set
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- Identity server can be changed on another user's device, so when the change is detected (thanks to account data sync) Element should properly disconnect from a previous identity server (I think it was not the case in Riot-Android, where we keep the token forever)
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- Registration to the identity server is managed with an openId token
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- Terms of service can be accepted when configuring the identity server.
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- Terms of service can be accepted after, if they change.
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- Identity server can be modified
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- Identity server can be disconnected with a warning dialog, with special content if there are current bound 3pid on this identity server.
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- Email can be bound
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- Email can be unbound
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- Phone can be bound
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- Phone can be unbound
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- Look up can be performed, to get matrixIds from local contact book (phone and email): Android permission correctly handled (not done yet)
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- Look up pepper can be updated if it is rotated on the identity server
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- Invitation using 3PID can be done (See #548) (not done yet)
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- Homeserver access-token will never be sent to an identity server
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- When user sign-out: logout from the identity server if any.
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- When user deactivate account: logout from the identity server if any.
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## Screens
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### Settings
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Identity server settings can be accessed from the internal setting of the application, both from "Discovery" section and from identity detail section.
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### Discovery screen
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This screen displays the identity server configuration and the binding of the user's ThreePid (email and msisdn). This is the main screen of the feature.
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### Set identity server screen
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This screen is a form to set a new identity server URL
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## Ref:
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- https://matrix.org/blog/2019/09/27/privacy-improvements-in-synapse-1-4-and-riot-1-4 is a good summary of the role of an identity server and the proper way to configure and use it in respect to the privacy and the consent of the user.
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- API documentation: https://matrix.org/docs/spec/identity_service/latest
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- vector.im TOS: https://vector.im/identity-server-privacy-notice
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