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Implement key retention for signing keys #22

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opened 2020-10-28 17:07:11 +00:00 by timokoesters · 1 comment
timokoesters commented 2020-10-28 17:07:11 +00:00 (Migrated from gitlab.com)
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Currently the server signing key is stored in sled.
As we now federated we need to make sure to keep this keys during database resets.
When a HS joins a federated room old events that were signed with a deleted keys fail validation.
Old keys need to be presented in old_verify_keys during key lookup.

This can be done multiple ways:

  • Write db reset cli tool that will extract the public key prior to deleting the db and insert it into an oldkey tree in a new empty database. Is this possible?
  • Add another datastore for the signing key to avoid resetting it (e.g. load the key from disk during server start, similar to dendrite and synapse)
  • more ideas?
Currently the server signing key is stored in sled. As we now federated we need to make sure to keep this keys during database resets. When a HS joins a federated room old events that were signed with a deleted keys fail validation. Old keys need to be presented in old_verify_keys during key lookup. This can be done multiple ways: * Write db reset cli tool that will extract the public key prior to deleting the db and insert it into an oldkey tree in a new empty database. Is this possible? * Add another datastore for the signing key to avoid resetting it (e.g. load the key from disk during server start, similar to dendrite and synapse) * more ideas?
timokoesters commented 2020-10-28 17:07:16 +00:00 (Migrated from gitlab.com)
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Do we really need to remember the key? We recently switched to giving a different key ID after each reset, so new events validate correctly. For old events, servers can also query keys from other servers: https://matrix.org/docs/spec/server_server/r0.1.4#querying-keys-through-another-server

Do we really need to remember the key? We recently switched to giving a different key ID after each reset, so new events validate correctly. For old events, servers can also query keys from other servers: https://matrix.org/docs/spec/server_server/r0.1.4#querying-keys-through-another-server
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