84 lines
2.8 KiB
Rust
84 lines
2.8 KiB
Rust
// Copyright 2015-2019 Parity Technologies (UK) Ltd.
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// This file is part of Parity Ethereum.
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// Parity Ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU 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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// Parity Ethereum 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 General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity Ethereum. If not, see <http://www.gnu.org/licenses/>.
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//! A signer used by Engines which need to sign messages.
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use ethereum_types::{Address, H256};
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use ethkey::{self, Signature};
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/// Everything that an Engine needs to sign messages.
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pub trait EngineSigner: Send + Sync {
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/// Sign a consensus message hash.
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fn sign(&self, hash: H256) -> Result<Signature, ethkey::Error>;
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/// Signing address
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fn address(&self) -> Address;
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}
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/// Creates a new `EngineSigner` from given key pair.
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pub fn from_keypair(keypair: ethkey::KeyPair) -> Box<dyn EngineSigner> {
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Box::new(Signer(keypair))
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}
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struct Signer(ethkey::KeyPair);
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impl EngineSigner for Signer {
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fn sign(&self, hash: H256) -> Result<Signature, ethkey::Error> {
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ethkey::sign(self.0.secret(), &hash)
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}
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fn address(&self) -> Address {
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self.0.address()
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}
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}
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#[cfg(test)]
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mod test_signer {
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use std::sync::Arc;
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use accounts::{self, AccountProvider, SignError};
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use ethkey::Password;
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use super::*;
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impl EngineSigner for (Arc<AccountProvider>, Address, Password) {
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fn sign(&self, hash: H256) -> Result<Signature, ethkey::Error> {
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match self.0.sign(self.1, Some(self.2.clone()), hash) {
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Err(SignError::NotUnlocked) => unreachable!(),
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Err(SignError::NotFound) => Err(ethkey::Error::InvalidAddress),
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Err(SignError::Hardware(err)) => {
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warn!("Error using hardware wallet for engine: {:?}", err);
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Err(ethkey::Error::InvalidSecret)
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}
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Err(SignError::SStore(accounts::Error::EthKey(err))) => Err(err),
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Err(SignError::SStore(accounts::Error::EthKeyCrypto(err))) => {
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warn!("Low level crypto error: {:?}", err);
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Err(ethkey::Error::InvalidSecret)
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}
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Err(SignError::SStore(err)) => {
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warn!("Error signing for engine: {:?}", err);
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Err(ethkey::Error::InvalidSignature)
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}
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Ok(ok) => Ok(ok),
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}
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}
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fn address(&self) -> Address {
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self.1
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}
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}
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}
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