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https://github.com/ethereum/go-ethereum.git
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b1809d13d1
Uses the go module's `replace` directive to delegate keccak computation to precompiles. This is still in draft because it needs more testing. Also, it relies on a PR that I created, that hasn't been merged yet. _Note that this PR doesn't implement the stateful keccak state structure, and it reverts to the current behavior. This is a bit silly since this is what is used in the tree root computation. The runtime doesn't currently export the sponge. I will see if I can fix that in a further PR, but it is going to take more time. In the meantime, this is a useful first step_
63 lines
1.7 KiB
Go
63 lines
1.7 KiB
Go
// Copyright 2025 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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//go:build !ziren
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package crypto
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import (
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"sync"
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"github.com/ethereum/go-ethereum/common"
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"golang.org/x/crypto/sha3"
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)
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// NewKeccakState creates a new KeccakState
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func NewKeccakState() KeccakState {
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return sha3.NewLegacyKeccak256().(KeccakState)
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}
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var hasherPool = sync.Pool{
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New: func() any {
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return sha3.NewLegacyKeccak256().(KeccakState)
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},
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}
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// Keccak256 calculates and returns the Keccak256 hash of the input data.
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func Keccak256(data ...[]byte) []byte {
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b := make([]byte, 32)
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d := hasherPool.Get().(KeccakState)
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d.Reset()
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for _, b := range data {
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d.Write(b)
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}
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d.Read(b)
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hasherPool.Put(d)
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return b
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}
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// Keccak256Hash calculates and returns the Keccak256 hash of the input data,
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// converting it to an internal Hash data structure.
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func Keccak256Hash(data ...[]byte) (h common.Hash) {
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d := hasherPool.Get().(KeccakState)
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d.Reset()
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for _, b := range data {
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d.Write(b)
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}
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d.Read(h[:])
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hasherPool.Put(d)
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return h
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}
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