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use std::{error::Error, fmt::Debug};
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use rsa::{
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pkcs8::{DecodePrivateKey, DecodePublicKey},
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pss::{Signature, SigningKey, VerifyingKey},
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sha2::Sha256,
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signature::{RandomizedSigner, SignatureEncoding, Verifier},
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RsaPrivateKey, RsaPublicKey,
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};
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use serde::{Deserialize, Serialize};
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use crate::handshake::HandshakeMessage;
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use self::{authentication::AuthenticationMessage, repository::RepositoryMessage};
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pub mod authentication;
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pub mod issues;
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pub mod repository;
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pub mod user;
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#[derive(Clone, Serialize, Deserialize)]
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pub enum MessageKind {
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Handshake(HandshakeMessage),
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Repository(RepositoryMessage),
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Authentication(AuthenticationMessage),
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}
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#[derive(Serialize, Deserialize)]
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pub struct Authenticated<T: Serialize> {
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#[serde(flatten)]
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message: T,
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token: String,
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digest: Vec<u8>,
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}
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impl<T> Clone for Authenticated<T>
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where
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T: Clone + Serialize,
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{
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fn clone(&self) -> Self {
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Self {
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message: self.message.clone(),
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token: self.token.clone(),
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digest: self.digest.clone(),
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}
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}
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}
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impl<T> Debug for Authenticated<T>
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where
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T: Debug + Serialize,
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{
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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f.debug_struct("Authenticated")
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.field("message", &self.message)
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.field("token", &self.token)
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.field("digest", &self.digest)
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.finish()
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}
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}
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impl<T: Serialize> Authenticated<T> {
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pub fn new(message: T, token: String, private_key: String) -> Result<Self, Box<dyn Error>> {
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let mut rng = rand::thread_rng();
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let private_key = RsaPrivateKey::from_pkcs8_pem(&private_key)?;
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let signing_key = SigningKey::<Sha256>::new(private_key);
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let message_json = serde_json::to_vec(&message)?;
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let signature = signing_key.sign_with_rng(&mut rng, &message_json);
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Ok(Self {
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message,
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token,
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digest: signature.to_vec(),
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})
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}
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pub async fn inner(&self) -> &T {
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&self.message
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}
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pub async fn validate(&self, key: String) -> Result<(), Box<dyn Error>> {
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let public_key = RsaPublicKey::from_public_key_pem(&key)?;
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let verifying_key: VerifyingKey<Sha256> = VerifyingKey::new(public_key);
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let message_json = serde_json::to_vec(&self.message)?;
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verifying_key.verify(&message_json, &Signature::try_from(self.digest.as_ref())?)?;
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Ok(())
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}
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}
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