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use crate::error::TryFromError;
#[cfg(feature = "b64")]
use crate::error::DecodeError;
use std::{fmt, cmp};
use std::convert::{TryFrom, TryInto};
use std::hash::{Hash, Hasher};
use x25519_dalek as x;
#[cfg(feature = "b64")]
use base64::engine::{Engine, general_purpose::URL_SAFE_NO_PAD};
#[derive(Clone)]
pub struct PublicKey {
pub inner: x::PublicKey
}
impl PublicKey {
pub const LEN: usize = 32;
pub(crate) fn from_ephemeral_secret(secret: &x::EphemeralSecret) -> Self {
Self {
inner: secret.into()
}
}
pub(crate) fn from_static_secret(secret: &x::StaticSecret) -> Self {
Self {
inner: secret.into()
}
}
pub fn from_slice(slice: &[u8]) -> Self {
slice.try_into().unwrap()
}
pub fn to_bytes(&self) -> [u8; 32] {
self.as_ref().try_into().unwrap()
}
pub fn inner(&self) -> &x::PublicKey {
&self.inner
}
}
#[cfg(not(feature = "b64"))]
impl fmt::Debug for PublicKey {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_tuple("PublicKey")
.field(&self.as_ref())
.finish()
}
}
#[cfg(feature = "b64")]
impl fmt::Debug for PublicKey {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_tuple("PublicKey")
.field(&self.to_string())
.finish()
}
}
#[cfg(feature = "b64")]
impl fmt::Display for PublicKey {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
base64::display::Base64Display::new(
self.as_ref(),
&URL_SAFE_NO_PAD
).fmt(f)
}
}
impl cmp::PartialEq for PublicKey {
fn eq(&self, other: &PublicKey) -> bool {
self.as_ref() == other.as_ref()
}
}
impl cmp::Eq for PublicKey {}
impl Hash for PublicKey {
fn hash<H: Hasher>(&self, state: &mut H) {
self.as_ref().hash(state)
}
}
impl From<[u8; 32]> for PublicKey {
fn from(bytes: [u8; 32]) -> Self {
Self {
inner: bytes.into()
}
}
}
impl TryFrom<&[u8]> for PublicKey {
type Error = TryFromError;
fn try_from(v: &[u8]) -> Result<Self, Self::Error> {
<[u8; 32]>::try_from(v)
.map_err(TryFromError::from_any)
.map(Self::from)
}
}
#[cfg(feature = "b64")]
impl crate::FromStr for PublicKey {
type Err = DecodeError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
if s.len() != crate::calculate_b64_len(Self::LEN) {
return Err(DecodeError::InvalidLength)
}
let mut bytes = [0u8; Self::LEN];
URL_SAFE_NO_PAD.decode_slice_unchecked(s, &mut bytes)
.map_err(DecodeError::inv_bytes)
.and_then(|_| {
Self::try_from(bytes.as_ref())
.map_err(DecodeError::inv_bytes)
})
}
}
impl AsRef<[u8]> for PublicKey {
fn as_ref(&self) -> &[u8] {
self.inner.as_bytes()
}
}
#[cfg(all(feature = "b64", feature = "serde"))]
mod impl_serde {
use super::*;
use std::borrow::Cow;
use std::str::FromStr;
use _serde::{Serialize, Serializer, Deserialize, Deserializer};
use _serde::de::Error;
impl Serialize for PublicKey {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where S: Serializer {
serializer.collect_str(&self)
}
}
impl<'de> Deserialize<'de> for PublicKey {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where D: Deserializer<'de> {
let s: Cow<'_, str> = Deserialize::deserialize(deserializer)?;
Self::from_str(s.as_ref())
.map_err(D::Error::custom)
}
}
}