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 "title": "test: add BIP32 vectors 3 and 4 to the extendedkey self-test",
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 "body": "`test_bip32_vectors` covers BIP32 vectors 1 and 2 only. Vectors 3 and 4 test retention of leading zeros in a private key and hardened derivation over such a key \u2014 the cases implementations have historically got wrong.\n\nBoth run against the existing API; no new capability is needed.",
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   "message": "test: add BIP32 vectors 3 and 4 to the extendedkey self-test\n\ntest_bip32_vectors covers vectors 1 and 2 only. Add vectors 3 and 4 from\nBIP32, which exercise retention of leading zeros in a private key and\nhardened derivation over such a key. Both run against the existing API."
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