prople_crypto/eddsa/
pubkey.rs

1//! `pubkey` is a module that provides a [`PubKey`] data structure which will be used
2//! to verify given digital signature
3use rst_common::with_cryptography::ed25519_dalek::{
4    Signature as EdDSASignature, Verifier, VerifyingKey,
5};
6
7use crate::eddsa::types::errors::*;
8use crate::eddsa::types::{PublicKeyBytes, SignatureBytes};
9use crate::types::{ByteHex, Value};
10
11/// `PubKey` is an object that will serialize and encode the [`VerifyingKey`]
12///
13/// This key should be able used to validate the signature that made by it's private key
14#[derive(Debug, Clone, PartialEq)]
15pub struct PubKey {
16    key: VerifyingKey,
17}
18
19impl PubKey {
20    pub fn new(key: VerifyingKey) -> Self {
21        Self { key }
22    }
23
24    pub fn serialize(&self) -> PublicKeyBytes {
25        PublicKeyBytes::from(self.key.to_bytes())
26    }
27
28    pub fn to_hex(&self) -> ByteHex {
29        ByteHex::from(self.key)
30    }
31
32    pub fn from_hex(val: ByteHex) -> Result<Self, EddsaError> {
33        let pub_bytes = PublicKeyBytes::try_from(val)?;
34        let pub_bytes_val = pub_bytes
35            .get()
36            .map_err(|err| EddsaError::ParsePublicKeyError(err.to_string()))?;
37
38        VerifyingKey::from_bytes(&pub_bytes_val)
39            .map(|val| Self { key: val })
40            .map_err(|err| EddsaError::InvalidPubKeyError(err.to_string()))
41    }
42
43    pub fn verify(&self, message: &[u8], signature_hex: ByteHex) -> Result<bool, EddsaError> {
44        let signature_bytes = SignatureBytes::try_from(signature_hex)?;
45        let signature_bytes_val = signature_bytes
46            .get()
47            .map_err(|err| EddsaError::ParseSignatureError(err.to_string()))?;
48
49        let signature = EdDSASignature::from_bytes(&signature_bytes_val);
50        self.key
51            .verify(message, &signature)
52            .map(|_| true)
53            .map_err(|err| EddsaError::InvalidSignatureError(err.to_string()))
54    }
55}
prople_crypto/eddsa/pubkey.rs

prople_crypto/eddsa/
pubkey.rs
