did_toolkit/
jwk.rs

1use josekit::jwk::{alg::ec::EcCurve, Jwk};
2use serde::{Deserialize, Serialize};
3use std::hash::{Hash, Hasher};
4
5/// Encapsulation of JSON Web Keys, provided by the [josekit] crate underneath. Serialization
6/// omits the private key fields deliberately according to DID spec, as it is assumed for these
7/// purposes it will be used in a decentralized identity document.
8///
9/// See <https://www.w3.org/TR/did-core/#verification-material> for more information.
10#[derive(Clone, Debug, PartialEq, Eq, Deserialize)]
11pub struct JWK(pub Jwk);
12
13impl JWK {
14    /// Creates a new JWK and generates a key for it. The underlying key will have private key
15    /// material.
16    pub fn new() -> Result<Self, anyhow::Error> {
17        Ok(JWK(Jwk::generate_ec_key(EcCurve::P256)?))
18    }
19
20    /// Creates a new JWK struct from an existing series of bytes
21    pub fn new_from_bytes(bytes: &[u8]) -> Result<Self, anyhow::Error> {
22        Ok(JWK(Jwk::from_bytes(bytes)?))
23    }
24
25    /// Erases the private key material and creates a new struct from the result.
26    pub fn to_public_only(&self) -> Result<Self, anyhow::Error> {
27        Ok(JWK(self.0.to_public_key()?))
28    }
29}
30
31impl Serialize for JWK {
32    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
33    where
34        S: serde::Serializer,
35    {
36        match self.to_public_only() {
37            Ok(public) => public.0.serialize(serializer),
38            Err(e) => Err(serde::ser::Error::custom(e)),
39        }
40    }
41}
42
43impl Hash for JWK {
44    fn hash<H: Hasher>(&self, state: &mut H) {
45        self.0.key_id().hash(state)
46    }
47}
48
49impl PartialOrd for JWK {
50    fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
51        let mut state = std::collections::hash_map::DefaultHasher::default();
52        let mut other_state = std::collections::hash_map::DefaultHasher::default();
53        self.hash(&mut state);
54        other.hash(&mut other_state);
55
56        state.finish().partial_cmp(&other_state.finish())
57    }
58}
59
60impl Ord for JWK {
61    fn cmp(&self, other: &Self) -> std::cmp::Ordering {
62        self.partial_cmp(other).unwrap()
63    }
64}
did_toolkit/jwk.rs

did_toolkit/
jwk.rs
