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Improve error message for cross signing reset with MSC3861 enabled (#17121)

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Michael Telatynski 2024-04-26 09:54:30 +01:00 committed by GitHub
parent 90cc9e5b29
commit 41fbe387d6
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2 changed files with 9 additions and 5 deletions
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1
changelog.d/17121.bugfix Normal file
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@ -0,0 +1 @@
Improve error message for cross signing reset with MSC3861 enabled.

13
synapse/rest/client/keys.py
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@ -393,17 +393,20 @@ class SigningKeyUploadServlet(RestServlet):
# time. Because there is no UIA in MSC3861, for now we throw an error if the
# user tries to reset the device signing key when MSC3861 is enabled, but allow
# first-time setup.
#
# XXX: We now have a get-out clause by which MAS can temporarily mark the master
# key as replaceable. It should do its own equivalent of user interactive auth
# before doing so.
if self.hs.config.experimental.msc3861.enabled:
# The auth service has to explicitly mark the master key as replaceable
# without UIA to reset the device signing key with MSC3861.
if is_cross_signing_setup and not master_key_updatable_without_uia:
config = self.hs.config.experimental.msc3861
if config.account_management_url is not None:
url = f"{config.account_management_url}?action=org.matrix.cross_signing_reset"
else:
url = config.issuer
raise SynapseError(
HTTPStatus.NOT_IMPLEMENTED,
"Resetting cross signing keys is not yet supported with MSC3861",
"To reset your end-to-end encryption cross-signing identity, "
f"you first need to approve it at {url} and then try again.",
Codes.UNRECOGNIZED,
)
# But first-time setup is fine