crypto: use btcec/v2 for no-cgo#24533
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fjl merged 1 commit intoethereum:masterfrom Mar 16, 2022
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chappjc
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Mar 13, 2022
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Thanks! I will review tomorrow! |
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Pushed some minor changes to make it a bit more defensive: checking expected lengths, using package-level consts, and zeroing the temporary |
This updates the no-cgo implementations in the crypto package to use the github.com/btcsuite/btcd/btcec/v2 module instead of the older btcec package that was part of the main github.com/btcsuite/btcd module. name old time/op new time/op delta EcrecoverSignature-32 198µs ± 0% 144µs ± 0% -27.11% VerifySignature-32 177µs ± 0% 128µs ± 0% -27.44% DecompressPubkey-32 20.9µs ± 0% 10.1µs ± 0% -51.51% Use (*ModNScalar).IsOverHalfOrder instead of math/big.Int when checking for malleable signatures.
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I've checked this some more and it works as expected! While performance of btcec still lags behind C libsecp256k1 quite a bit, I can confirm 20% speedup of the non-cgo path with this update.
Thanks again for this work!
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This updates the no-cgo implementations in the crypto package to use the github.com/btcsuite/btcd/btcec/v2 module instead of the older btcec package that was part of the main github.com/btcsuite/btcd module. name old time/op new time/op delta EcrecoverSignature-32 198µs ± 0% 144µs ± 0% -27.11% VerifySignature-32 177µs ± 0% 128µs ± 0% -27.44% DecompressPubkey-32 20.9µs ± 0% 10.1µs ± 0% -51.51% Use (*ModNScalar).IsOverHalfOrder instead of math/big.Int when checking for malleable signatures.
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This updates the no-cgo implementations in the crypto package to use the github.com/btcsuite/btcd/btcec/v2 module instead of the older btcec package that was part of the main github.com/btcsuite/btcd module. name old time/op new time/op delta EcrecoverSignature-32 198µs ± 0% 144µs ± 0% -27.11% VerifySignature-32 177µs ± 0% 128µs ± 0% -27.44% DecompressPubkey-32 20.9µs ± 0% 10.1µs ± 0% -51.51% Use (*ModNScalar).IsOverHalfOrder instead of math/big.Int when checking for malleable signatures.
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This updates the no-cgo code in the
cryptopackage to use the new github.com/btcsuite/btcd/btcec/v2 module instead of the older btcec package that was part of the main github.com/btcsuite/btcd module.This is nice as it removes the dependency on the legacy
btcdmega-module that does not yet follow semantic import versioning (has breaking Go API changes between versions like v0.21 and v0.22) with the newbtcec/v2module that does follow SIV, plus it brings performance improvements:The tests that passed previously with
CGO_ENABLED=0still pass, and the secp256k1 fuzzing results show no discrepancies with the cgo version.tests/fuzzers/secp256k1:
The most notable recent breaking change in the main
btcdmodule that was previously required is that with the introduction of thebtcec/v2module, there is no longer a btcec package in the mainbtcdmodule, which creates build errors when the latest revisions of btcd are used by either go-ethereum or transitive dependencies. Moving to thebtcec/v2module resolves this issue.CC @fjl