fix: reject unauthenticated vss encryption - #20
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Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
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This PR rejects unauthenticated VSS clients so backup data cannot be encrypted with a public all-zero key.
Description
vss_new_clientpreviously encrypted application data with[0u8; 32]. That constructor now returnsAuthError. Clients must use LNURL-auth so the encryption key is seed-derived.The UniFFI signature is unchanged, so existing app fallbacks fail closed once they bump this library.
Related: synonymdev/audit#55 (BITKIT-SEC-003).
QA Notes
Manual Tests
regression:call unauthenticatedvss_new_client: returnsAuthError.Automated Checks
AuthError.cargo test --lib: 19 passed.Release