Implement BIP-32 Test Vector 5 validation #1294
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Reject invalid extended keys per BIP-32 spec: - Master keys (depth 0) must have zero parent fingerprint and child index - Add tests for all Test Vector 5 invalid key cases
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It was found through differential fuzzing using Bitcoinfuzz.
Reject invalid extended keys per BIP-32 spec:
Thank you to @kuliq23 and @quapka for creating the target that identified this issue.