mirror of https://github.com/poanetwork/quorum.git
61 lines
1.9 KiB
Go
61 lines
1.9 KiB
Go
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// Copyright 2017 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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package istanbul
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import (
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/crypto/sha3"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/rlp"
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)
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func RLPHash(v interface{}) (h common.Hash) {
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hw := sha3.NewKeccak256()
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rlp.Encode(hw, v)
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hw.Sum(h[:0])
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return h
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}
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// GetSignatureAddress gets the signer address from the signature
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func GetSignatureAddress(data []byte, sig []byte) (common.Address, error) {
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// 1. Keccak data
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hashData := crypto.Keccak256([]byte(data))
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// 2. Recover public key
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pubkey, err := crypto.SigToPub(hashData, sig)
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if err != nil {
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return common.Address{}, err
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}
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return crypto.PubkeyToAddress(*pubkey), nil
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}
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func CheckValidatorSignature(valSet ValidatorSet, data []byte, sig []byte) (common.Address, error) {
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// 1. Get signature address
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signer, err := GetSignatureAddress(data, sig)
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if err != nil {
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log.Error("Failed to get signer address", "err", err)
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return common.Address{}, err
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}
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// 2. Check validator
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if _, val := valSet.GetByAddress(signer); val != nil {
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return val.Address(), nil
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}
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return common.Address{}, ErrUnauthorizedAddress
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}
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