13.x: do not fulfill BIP32 requests outside descriptor path - #1010
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apoelstra merged 2 commits intoJul 31, 2026
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Remove the early `Xpriv::get_key` return in `DescriptorSecretKey::get_key`. That path matched on fingerprint only and ignored derivation path / wildcard, so a master xprv in e.g. `.../0/*` would sign sibling paths like `.../9/7`. Rely on `matches()` only. Assisted-by: Grok 4.5
Regression: master xprv descriptors such as `.../0/*` must not fulfill `KeyRequest::Bip32` for sibling paths like `.../9/7`. Assisted-by: Grok 4.5
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Backport of #1004.
Fixes bypassing descriptor path validation for
GetKeyon sibling paths.