112 lines
3.2 KiB
Rust
112 lines
3.2 KiB
Rust
// Copyright 2015, 2016 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity 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 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. If not, see <http://www.gnu.org/licenses/>.
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use std::fmt;
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use secp256k1::key;
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use rustc_serialize::hex::ToHex;
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use keccak::Keccak256;
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use super::{Secret, Public, Address, SECP256K1, Error};
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pub fn public_to_address(public: &Public) -> Address {
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let hash = public.keccak256();
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let mut result = Address::default();
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result.copy_from_slice(&hash[12..]);
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result
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}
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/// secp256k1 key pair
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pub struct KeyPair {
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secret: Secret,
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public: Public,
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}
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impl fmt::Display for KeyPair {
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fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
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try!(writeln!(f, "secret: {}", self.secret.to_hex()));
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try!(writeln!(f, "public: {}", self.public.to_hex()));
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write!(f, "address: {}", self.address().to_hex())
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}
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}
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impl KeyPair {
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/// Create a pair from secret key
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pub fn from_secret(secret: Secret) -> Result<KeyPair, Error> {
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let context = &SECP256K1;
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let s: key::SecretKey = try!(key::SecretKey::from_slice(context, &secret[..]));
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let pub_key = try!(key::PublicKey::from_secret_key(context, &s));
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let serialized = pub_key.serialize_vec(context, false);
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let mut public = Public::default();
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public.copy_from_slice(&serialized[1..65]);
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let keypair = KeyPair {
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secret: secret,
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public: public,
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};
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Ok(keypair)
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}
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pub fn from_keypair(sec: key::SecretKey, publ: key::PublicKey) -> Self {
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let context = &SECP256K1;
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let serialized = publ.serialize_vec(context, false);
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let mut secret = Secret::default();
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secret.copy_from_slice(&sec[0..32]);
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let mut public = Public::default();
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public.copy_from_slice(&serialized[1..65]);
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KeyPair {
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secret: secret,
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public: public,
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}
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}
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pub fn secret(&self) -> &Secret {
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&self.secret
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}
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pub fn public(&self) -> &Public {
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&self.public
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}
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pub fn address(&self) -> Address {
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public_to_address(&self.public)
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}
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}
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#[cfg(test)]
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mod tests {
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use std::str::FromStr;
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use {KeyPair, Secret};
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#[test]
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fn from_secret() {
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let secret = Secret::from_str("a100df7a048e50ed308ea696dc600215098141cb391e9527329df289f9383f65").unwrap();
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let _ = KeyPair::from_secret(secret).unwrap();
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}
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#[test]
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fn keypair_display() {
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let expected =
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"secret: a100df7a048e50ed308ea696dc600215098141cb391e9527329df289f9383f65
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public: 8ce0db0b0359ffc5866ba61903cc2518c3675ef2cf380a7e54bde7ea20e6fa1ab45b7617346cd11b7610001ee6ae5b0155c41cad9527cbcdff44ec67848943a4
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address: 5b073e9233944b5e729e46d618f0d8edf3d9c34a".to_owned();
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let secret = Secret::from_str("a100df7a048e50ed308ea696dc600215098141cb391e9527329df289f9383f65").unwrap();
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let kp = KeyPair::from_secret(secret).unwrap();
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assert_eq!(format!("{}", kp), expected);
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}
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}
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