mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-06-30 16:37:24 +00:00
Bastian Köcher
103 lines
2.9 KiB
Rust
103 lines
2.9 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 2019-2021 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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// 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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// 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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// 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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//! implementation of the `verify` subcommand
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use crate::{error, utils, with_crypto_scheme, CryptoSchemeFlag};
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use sp_core::{Public, crypto::Ss58Codec};
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use structopt::StructOpt;
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/// The `verify` command
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#[derive(Debug, StructOpt, Clone)]
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#[structopt(
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name = "verify",
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about = "Verify a signature for a message, provided on STDIN, with a given (public or secret) key"
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)]
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pub struct VerifyCmd {
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/// Signature, hex-encoded.
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sig: String,
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/// The public or secret key URI.
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/// If the value is a file, the file content is used as URI.
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/// If not given, you will be prompted for the URI.
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uri: Option<String>,
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/// Message to verify, if not provided you will be prompted to
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/// pass the message via STDIN
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#[structopt(long)]
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message: Option<String>,
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/// The message on STDIN is hex-encoded data
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#[structopt(long)]
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hex: bool,
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#[allow(missing_docs)]
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#[structopt(flatten)]
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pub crypto_scheme: CryptoSchemeFlag,
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}
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impl VerifyCmd {
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/// Run the command
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pub fn run(&self) -> error::Result<()> {
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let message = utils::read_message(self.message.as_ref(), self.hex)?;
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let sig_data = utils::decode_hex(&self.sig)?;
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let uri = utils::read_uri(self.uri.as_ref())?;
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let uri = if uri.starts_with("0x") {
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&uri[2..]
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} else {
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&uri
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};
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with_crypto_scheme!(
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self.crypto_scheme.scheme,
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verify(sig_data, message, uri)
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)
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}
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}
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fn verify<Pair>(sig_data: Vec<u8>, message: Vec<u8>, uri: &str) -> error::Result<()>
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where
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Pair: sp_core::Pair,
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Pair::Signature: Default + AsMut<[u8]>,
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{
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let mut signature = Pair::Signature::default();
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if sig_data.len() != signature.as_ref().len() {
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return Err(
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error::Error::SignatureInvalidLength {
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read: sig_data.len(),
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expected: signature.as_ref().len(),
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}
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);
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}
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signature.as_mut().copy_from_slice(&sig_data);
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let pubkey = if let Ok(pubkey_vec) = hex::decode(uri) {
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Pair::Public::from_slice(pubkey_vec.as_slice())
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} else {
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Pair::Public::from_string(uri)?
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};
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if Pair::verify(&signature, &message, &pubkey) {
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println!("Signature verifies correctly.");
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} else {
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return Err(error::Error::SignatureInvalid)
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}
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Ok(())
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}
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