crypto.go

// Copyright 2023 The evm Authors
// This file is part of the evm library.
//
// The evm library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The evm library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the evm library. If not, see <http://www.gnu.org/licenses/>.

package evm

import (
	"hash"

	"github.com/ethereum/go-ethereum/crypto"
)

type KeccakState interface {
	hash.Hash
	Read([]byte) (int, error)
}

func NewKeccakState() KeccakState {
	return crypto.NewKeccakState()
}

func Keccak256Hash(data ...[]byte) (h Hash) {
	h.SetBytes(Keccak256(data...))
	return h
}

func Keccak256(data ...[]byte) []byte {
	b := make([]byte, 32)
	d := NewKeccakState()
	for _, b := range data {
		d.Write(b)
	}
	d.Read(b)
	return b
}