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// Copyright 2019 Hristo Venev
//
// See COPYING.
use crate::bin;
use crate::ip::{Ipv4Addr, Ipv4Net, Ipv6Addr, Ipv6Net, NetParseError};
use base64;
use std::collections::HashMap;
use std::fmt;
use std::str::FromStr;
pub type KeyParseError = base64::DecodeError;
#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
pub struct Key([u8; 32]);
impl Key {
pub fn from_bytes(s: &[u8]) -> Result<Key, KeyParseError> {
let mut v = Key([0u8; 32]);
let l = base64::decode_config_slice(s, base64::STANDARD, &mut v.0)?;
if l != v.0.len() {
return Err(base64::DecodeError::InvalidLength);
}
Ok(v)
}
}
impl fmt::Display for Key {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(
f,
"{}",
base64::display::Base64Display::with_config(&self.0, base64::STANDARD)
)
}
}
impl FromStr for Key {
type Err = KeyParseError;
#[inline]
fn from_str(s: &str) -> Result<Key, base64::DecodeError> {
Key::from_bytes(s.as_bytes())
}
}
impl serde::Serialize for Key {
fn serialize<S: serde::Serializer>(&self, ser: S) -> Result<S::Ok, S::Error> {
if ser.is_human_readable() {
ser.collect_str(self)
} else {
ser.serialize_bytes(&self.0)
}
}
}
impl<'de> serde::Deserialize<'de> for Key {
fn deserialize<D: serde::Deserializer<'de>>(de: D) -> Result<Self, D::Error> {
if de.is_human_readable() {
struct KeyVisitor;
impl<'de> serde::de::Visitor<'de> for KeyVisitor {
type Value = Key;
#[inline]
fn expecting(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str("WireGuard key")
}
#[inline]
fn visit_str<E: serde::de::Error>(self, s: &str) -> Result<Self::Value, E> {
s.parse().map_err(E::custom)
}
}
de.deserialize_str(KeyVisitor)
} else {
serde::Deserialize::deserialize(de).map(Key)
}
}
}
#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
pub struct Endpoint {
address: Ipv6Addr,
port: u16,
}
impl Endpoint {
#[inline]
pub fn ipv6_address(&self) -> Ipv6Addr {
self.address
}
#[inline]
pub fn ipv4_address(&self) -> Option<Ipv4Addr> {
let seg = self.address.octets();
let (first, second) = array_refs![&seg, 12, 4];
if *first == [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff] {
Some(Ipv4Addr::from(*second))
} else {
None
}
}
#[inline]
pub fn port(&self) -> u16 {
self.port
}
}
impl fmt::Display for Endpoint {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
if let Some(ipv4) = self.ipv4_address() {
write!(f, "{}:", ipv4)?;
} else {
write!(f, "[{}]:", self.ipv6_address())?;
}
write!(f, "{}", self.port())
}
}
impl FromStr for Endpoint {
type Err = NetParseError;
fn from_str(s: &str) -> Result<Endpoint, NetParseError> {
use std::net;
net::SocketAddr::from_str(s)
.map_err(|_| NetParseError)
.map(|v| Endpoint {
address: match v.ip() {
net::IpAddr::V4(a) => a.to_ipv6_mapped(),
net::IpAddr::V6(a) => a,
},
port: v.port(),
})
}
}
impl serde::Serialize for Endpoint {
fn serialize<S: serde::Serializer>(&self, ser: S) -> Result<S::Ok, S::Error> {
if ser.is_human_readable() {
ser.collect_str(self)
} else {
let mut buf = [0u8; 16 + 2];
let (buf_addr, buf_port) = mut_array_refs![&mut buf, 16, 2];
*buf_addr = self.address.octets();
*buf_port = crate::bin::u16_to_be(self.port);
ser.serialize_bytes(&buf)
}
}
}
impl<'de> serde::Deserialize<'de> for Endpoint {
fn deserialize<D: serde::Deserializer<'de>>(de: D) -> Result<Self, D::Error> {
if de.is_human_readable() {
struct EndpointVisitor;
impl<'de> serde::de::Visitor<'de> for EndpointVisitor {
type Value = Endpoint;
#[inline]
fn expecting(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str("IP:port")
}
#[inline]
fn visit_str<E: serde::de::Error>(self, s: &str) -> Result<Self::Value, E> {
s.parse().map_err(E::custom)
}
}
de.deserialize_str(EndpointVisitor)
} else {
let buf = <[u8; 16 + 2] as serde::Deserialize>::deserialize(de)?;
let (buf_addr, buf_port) = array_refs![&buf, 16, 2];
Ok(Endpoint {
address: (*buf_addr).into(),
port: bin::u16_from_be(*buf_port),
})
}
}
}
#[derive(serde_derive::Serialize, serde_derive::Deserialize, Clone, PartialEq, Eq, Debug)]
pub struct Peer {
pub endpoint: Option<Endpoint>,
pub psk: Option<Key>,
pub keepalive: u32,
pub ipv4: Vec<Ipv4Net>,
pub ipv6: Vec<Ipv6Net>,
}
#[derive(serde_derive::Serialize, serde_derive::Deserialize, Clone, PartialEq, Eq, Debug)]
pub struct Config {
pub peers: HashMap<Key, Peer>,
}
impl Default for Config {
#[inline]
fn default() -> Config {
Config {
peers: HashMap::new(),
}
}
}
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