61 lines
1.9 KiB
Rust
61 lines
1.9 KiB
Rust
// Copyright 2015-2020 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::{H256, Address};
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use parity_crypto::publickey::{ecies, Public, Signature, KeyPair, Error};
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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, Error>;
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/// Signing address
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fn address(&self) -> Address;
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/// Decrypt a message that was encrypted to this signer's key.
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fn decrypt(&self, auth_data: &[u8], cipher: &[u8]) -> Result<Vec<u8>, Error>;
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/// The signer's public key, if available.
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fn public(&self) -> Option<Public>;
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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: KeyPair) -> Box<dyn EngineSigner> {
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Box::new(Signer(keypair))
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}
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struct Signer(KeyPair);
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impl EngineSigner for Signer {
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fn sign(&self, hash: H256) -> Result<Signature, Error> {
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parity_crypto::publickey::sign(self.0.secret(), &hash)
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}
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fn decrypt(&self, auth_data: &[u8], cipher: &[u8]) -> Result<Vec<u8>, Error> {
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ecies::decrypt(self.0.secret(), auth_data, cipher)
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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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fn public(&self) -> Option<Public> {
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Some(*self.0.public())
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}
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}
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