openethereum/ethkey/src/random.rs

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// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
use rand::os::OsRng;
use super::{Generator, KeyPair, SECP256K1};
/// Randomly generates new keypair, instantiating the RNG each time.
pub struct Random;
impl Generator for Random {
type Error = ::std::io::Error;
fn generate(self) -> Result<KeyPair, Self::Error> {
let mut rng = OsRng::new()?;
match rng.generate() {
Ok(pair) => Ok(pair),
Err(void) => match void {}, // LLVM unreachable
}
}
}
impl<'a> Generator for &'a mut OsRng {
type Error = ::Void;
fn generate(self) -> Result<KeyPair, Self::Error> {
let (sec, publ) = SECP256K1.generate_keypair(self)
.expect("context always created with full capabilities; qed");
Ok(KeyPair::from_keypair(sec, publ))
}
}