1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45

//! See [`PublicKey`].

use arrayvec::ArrayVec;
use serde::{Deserialize, Serialize};
use serde_big_array::BigArray;

use crate::{Config, Group};

/// Public key, used to verify the server by the client. See
/// [`ClientRegistration::register()`](crate::ClientRegistration::register).
#[derive(Clone, Copy, Debug, Deserialize, Eq, Hash, Ord, PartialEq, PartialOrd, Serialize)]
pub struct PublicKey {
	/// [`Config`] this [`PublicKey`] was created with.
	pub(crate) config: Config,
	/// Public key bytes.
	#[serde(with = "BigArray")]
	pub(crate) key: [u8; 33],
}

impl PublicKey {
	/// Create a [`PublicKey`] from a `[u8; 33]`.
	pub(crate) const fn new(config: Config, key: [u8; 33]) -> Self {
		Self { config, key }
	}

	/// Returns the [`Config`] associated with this [`PublicKey`].
	#[must_use]
	pub const fn config(self) -> Config {
		self.config
	}

	/// Returns an [`ArrayVec`] of this key.
	#[must_use]
	pub fn to_bytes(&self) -> ArrayVec<u8, 33> {
		let mut bytes = ArrayVec::from(self.key);

		match self.config.group() {
			Group::Ristretto255 => bytes.truncate(32),
			#[cfg(feature = "p256")]
			Group::P256 => bytes.truncate(33),
		}

		bytes
	}
}