mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-07-14 01:35:50 +00:00
Bastian Köcher
51 lines
2.0 KiB
Rust
51 lines
2.0 KiB
Rust
// This file is part of Substrate.
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//
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// Copyright (C) 2017-2022 Parity Technologies (UK) Ltd.
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// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
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//
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// This program 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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//
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// This program 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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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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//
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// If you read this, you are very thorough, congratulations.
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use super::*;
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/// A result of signing a message with a network identity. Since `PeerId` is potentially a hash of a
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/// `PublicKey`, you need to reveal the `PublicKey` next to the signature, so the verifier can check
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/// if the signature was made by the entity that controls a given `PeerId`.
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pub struct Signature {
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/// The public key derived from the network identity that signed the message.
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pub public_key: PublicKey,
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/// The actual signature made for the message signed.
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pub bytes: Vec<u8>,
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}
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impl Signature {
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/// Create a signature for a message with a given network identity.
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pub fn sign_message(
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message: impl AsRef<[u8]>,
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keypair: &Keypair,
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) -> Result<Self, SigningError> {
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let public_key = keypair.public();
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let bytes = keypair.sign(message.as_ref())?;
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Ok(Self { public_key, bytes })
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}
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/// Verify whether the signature was made for the given message by the entity that controls the
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/// given `PeerId`.
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pub fn verify(&self, message: impl AsRef<[u8]>, peer_id: &PeerId) -> bool {
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*peer_id == self.public_key.to_peer_id() &&
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self.public_key.verify(message.as_ref(), &self.bytes)
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}
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}
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