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davxy
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Nov 5, 2022
| // convert to ETH address | ||
| <[u8; 20]>::try_from( | ||
| sp_io::hashing::keccak_256(&uncompressed.as_bytes()[1..])[12..].as_ref(), | ||
| sp_io::hashing::keccak_256(uncompressed.as_bytes())[12..].as_ref(), |
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The (standard) byte-encoded form for uncompressed pub keys still uses the first byte to express that the byte sequence represents the uncompressed form (i.e. 0x04 value for the tag).
(https://github.com/RustCrypto/formats/blob/bbab401934a2e93d28053fd74613ffef74cd6e88/sec1/src/point.rs#L132)
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This is already happening here #12085 and paritytech/polkadot#6238 |
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k256to 0.11. It includes some security fixes (added zeroization of secret data), bug fixes, and quality of life improvements (like recoverable signature derivation). Unfortunately, the old version ofk256locks projects usingsubstrateout of upgradingk256themselves (workspaces: overzealous native library dependency conflicting rust-lang/cargo#7880).EncodedPointdoes not include a tag byte (see https://github.com/RustCrypto/formats/blob/master/sec1/src/point.rs#L120), so taking a hash of[1..]will lead to an incorrect address.