add resignKeyBackup, updateBackupSignature, resignKeyBackup #4171
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Add methods to sign the current backup again and upload it. This aims to fix the problem, that a key backup exists but no 4s, but the migration requires a resign of the backup.
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richvdh
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Apr 22, 2024
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See my comments on matrix-org/matrix-react-sdk#12441, but also:
resignKeyBackup feels like a very low-level, and dangerous primitive to expose. I really don't want applications to have to decide to arbitrarily re-sign existing key backups.
If this is a thing that we need to support, maybe we can make it part of bootstrapCrossSigning ?
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| // An alternative implementation could be using src\crypto\EncryptionSetup.ts and EncryptionSetupOperation, similar to: |
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that stuff is deprecated; let's not use it.
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As with matrix-org/matrix-react-sdk#12441: I don't really think this is the right thing to be doing. |
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When using key backups without 4s (secure secret storage and sharing) and signing in with the web-client then no migration is performed and the session cannot backup keys without any further user interaction (resetting cross signing (and key backup)).
This seems to be related to: element-hq/element-web#27100
ToDo: If the above is correct then a note for the Changelog will be added.
The changes here depend on the changes in matrix-react-sdk PR 12441 .
Checklist
public/exportedsymbols have accurate TSDoc documentation.Signed-off-by: Michael Schrader michael.schrader@connext.de