litep2p/crypto/
rsa.rs

1// Copyright 2025 litep2p developers
2//
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4// copy of this software and associated documentation files (the "Software"),
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9//
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14// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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20
21//! RSA public key.
22
23use crate::error::ParseError;
24use ring::signature::{UnparsedPublicKey, RSA_PKCS1_2048_8192_SHA256};
25use x509_parser::{prelude::FromDer, x509::SubjectPublicKeyInfo};
26
27/// An RSA public key.
28#[derive(Clone, Debug, PartialEq, Eq)]
29pub struct PublicKey(Vec<u8>);
30
31impl PublicKey {
32    /// Decode an RSA public key from a DER-encoded X.509 SubjectPublicKeyInfo structure.
33    pub fn try_decode_x509(spki: &[u8]) -> Result<Self, ParseError> {
34        SubjectPublicKeyInfo::from_der(spki)
35            .map(|(_, spki)| Self(spki.subject_public_key.as_ref().to_vec()))
36            .map_err(|_| ParseError::InvalidPublicKey)
37    }
38
39    /// Verify the RSA signature on a message using the public key.
40    pub fn verify(&self, msg: &[u8], sig: &[u8]) -> bool {
41        let key = UnparsedPublicKey::new(&RSA_PKCS1_2048_8192_SHA256, &self.0);
42        key.verify(msg, sig).is_ok()
43    }
44}
litep2p/crypto/rsa.rs

litep2p/crypto/
rsa.rs
