descriptors: disallow hybrid public keys #28587
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sipa
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The descriptor documentation (doc/descriptors.md) and BIP380 explicitly require that hex-encoded public keys start with 02 or 03 (compressed) or 04 (uncompressed). However, the current parsing/inference code permit 06 and 07 (hybrid) encoding as well. Fix this.
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Concept ACK. |
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So this was permitted in both the legacy wallet and descriptor wallets, but only for watchonly wallets. Since we wouldn't generate one from a privkey. Right? Trying to create a legacy wallet, importing a hybrid pubkey and migrating the wallet currently doesn't return an error (??) but does give a helpful message:
Trying to load a descriptor wallet containing a descriptor with a hybrid pubkey does return an error, although a slightly misleading one:
And it still logs a helpful error message mentioning hybrid keys. So this looks good to me overall. A node wouldn't start with a wallet containing a descriptor with a hybrid pubkey and we do log the right error message so a user would be able to figure out why it's failing. The migration not returning an error is a bit more concerning but also orthogonal to this PR. I'll ACK with a fresh head tomorrow morning. |
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ACK c1e6c54 |
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ACK c1e6c54 |
c1e6c54 descriptors: disallow hybrid public keys (Pieter Wuille) Pull request description: Fixes bitcoin#28511 The descriptor documentation (`doc/descriptors.md`) and [BIP380](https://github.com/bitcoin/bips/blob/master/bip-0380.mediawiki) explicitly require that hex-encoded public keys start with 02 or 03 (compressed) or 04 (uncompressed). However, the current parsing/inference code permit 06 and 07 (hybrid) encoding as well. Fix this. ACKs for top commit: darosior: ACK c1e6c54 achow101: ACK c1e6c54 Tree-SHA512: 23b674fb420619b2536d12da10008bb87cf7bc0333ec59e618c0d02c3574b468cc71248475ece37f76658d743ef51e68566948e903bca79fda5f7d75416fea4d
The descriptor documentation (doc/descriptors.md) and BIP380 explicitly require that hex-encoded public keys start with 02 or 03 (compressed) or 04 (uncompressed). However, the current parsing/inference code permit 06 and 07 (hybrid) encoding as well. Fix this. Github-Pull: bitcoin#28587 Rebased-From: c1e6c54
The descriptor documentation (doc/descriptors.md) and BIP380 explicitly require that hex-encoded public keys start with 02 or 03 (compressed) or 04 (uncompressed). However, the current parsing/inference code permit 06 and 07 (hybrid) encoding as well. Fix this. Github-Pull: bitcoin#28587 Rebased-From: c1e6c54
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Release note to be added in #29023. |
Fixes #28511
The descriptor documentation (
doc/descriptors.md) and BIP380 explicitly require that hex-encoded public keys start with 02 or 03 (compressed) or 04 (uncompressed). However, the current parsing/inference code permit 06 and 07 (hybrid) encoding as well. Fix this.