// 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 .
use std::fmt;
use serde::{Serialize, Serializer, Deserialize, Deserializer};
use serde::de::{Visitor, Error as SerdeError};
use super::{Error, H256};
#[derive(Debug, PartialEq)]
pub enum KdfSer {
Pbkdf2,
Scrypt,
}
impl Serialize for KdfSer {
fn serialize(&self, serializer: S) -> Result
where S: Serializer {
match *self {
KdfSer::Pbkdf2 => serializer.serialize_str("pbkdf2"),
KdfSer::Scrypt => serializer.serialize_str("scrypt"),
}
}
}
impl<'a> Deserialize<'a> for KdfSer {
fn deserialize(deserializer: D) -> Result
where D: Deserializer<'a> {
deserializer.deserialize_any(KdfSerVisitor)
}
}
struct KdfSerVisitor;
impl<'a> Visitor<'a> for KdfSerVisitor {
type Value = KdfSer;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
write!(formatter, "a kdf algorithm identifier")
}
fn visit_str(self, value: &str) -> Result where E: SerdeError {
match value {
"pbkdf2" => Ok(KdfSer::Pbkdf2),
"scrypt" => Ok(KdfSer::Scrypt),
_ => Err(SerdeError::custom(Error::UnsupportedKdf))
}
}
fn visit_string(self, value: String) -> Result where E: SerdeError {
self.visit_str(value.as_ref())
}
}
#[derive(Debug, PartialEq)]
pub enum Prf {
HmacSha256,
}
impl Serialize for Prf {
fn serialize(&self, serializer: S) -> Result
where S: Serializer {
match *self {
Prf::HmacSha256 => serializer.serialize_str("hmac-sha256"),
}
}
}
impl<'a> Deserialize<'a> for Prf {
fn deserialize(deserializer: D) -> Result
where D: Deserializer<'a> {
deserializer.deserialize_any(PrfVisitor)
}
}
struct PrfVisitor;
impl<'a> Visitor<'a> for PrfVisitor {
type Value = Prf;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
write!(formatter, "a prf algorithm identifier")
}
fn visit_str(self, value: &str) -> Result where E: SerdeError {
match value {
"hmac-sha256" => Ok(Prf::HmacSha256),
_ => Err(SerdeError::custom(Error::InvalidPrf)),
}
}
fn visit_string(self, value: String) -> Result where E: SerdeError {
self.visit_str(value.as_ref())
}
}
#[derive(Debug, PartialEq, Serialize, Deserialize)]
pub struct Pbkdf2 {
pub c: u32,
pub dklen: u32,
pub prf: Prf,
pub salt: H256,
}
#[derive(Debug, PartialEq, Serialize, Deserialize)]
pub struct Scrypt {
pub dklen: u32,
pub p: u32,
pub n: u32,
pub r: u32,
pub salt: H256,
}
#[derive(Debug, PartialEq)]
pub enum KdfSerParams {
Pbkdf2(Pbkdf2),
Scrypt(Scrypt),
}
impl Serialize for KdfSerParams {
fn serialize(&self, serializer: S) -> Result
where S: Serializer {
match *self {
KdfSerParams::Pbkdf2(ref params) => params.serialize(serializer),
KdfSerParams::Scrypt(ref params) => params.serialize(serializer),
}
}
}
impl<'a> Deserialize<'a> for KdfSerParams {
fn deserialize(deserializer: D) -> Result
where D: Deserializer<'a> {
use serde_json::{Value, from_value};
let v: Value = Deserialize::deserialize(deserializer)?;
from_value(v.clone()).map(KdfSerParams::Pbkdf2)
.or_else(|_| from_value(v).map(KdfSerParams::Scrypt))
.map_err(|_| D::Error::custom("Invalid KDF algorithm"))
}
}
#[derive(Debug, PartialEq)]
pub enum Kdf {
Pbkdf2(Pbkdf2),
Scrypt(Scrypt),
}