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use std::{any::type_name, fmt::Debug};
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use rsa::{
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pkcs1::DecodeRsaPrivateKey,
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pss::SigningKey,
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sha2::Sha256,
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signature::{RandomizedSigner, SignatureEncoding},
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RsaPrivateKey,
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};
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use serde::{Deserialize, Serialize};
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use tracing::info;
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use crate::messages::MessageTarget;
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use super::{instance::Instance, user::User};
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#[derive(Debug, Serialize, Deserialize)]
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pub struct UserTokenMetadata {
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pub user: User,
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pub generated_for: Instance,
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pub exp: u64,
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}
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#[derive(Debug)]
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pub struct Authenticated<T: Serialize> {
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pub target_instance: Option<Instance>,
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pub source: Vec<Box<dyn AuthenticationSourceProvider + Send + Sync>>,
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pub message_type: String,
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pub message: T,
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}
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#[derive(Debug, Hash, PartialEq, Eq, Serialize, Deserialize)]
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pub struct AuthenticatedPayload {
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pub target_instance: Option<Instance>,
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pub source: Vec<AuthenticationSource>,
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pub message_type: String,
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pub payload: Vec<u8>,
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}
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impl<T: Serialize> From<Authenticated<T>> for AuthenticatedPayload {
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fn from(mut value: Authenticated<T>) -> Self {
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let payload = bincode::serialize(&value.message).unwrap();
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AuthenticatedPayload {
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target_instance: value.target_instance,
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source: value
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.source
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.drain(..)
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.map(|provider| provider.as_ref().authenticate(&payload))
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.collect::<Vec<_>>(),
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message_type: value.message_type,
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payload,
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}
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}
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}
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pub trait AuthenticationSourceProvider: Debug {
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fn authenticate(&self, payload: &Vec<u8>) -> AuthenticationSource;
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}
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pub trait AuthenticationSourceProviders: Debug {
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fn authenticate_all(&self, payload: &Vec<u8>) -> Vec<AuthenticationSource>;
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}
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impl<A> AuthenticationSourceProviders for A
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where
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A: AuthenticationSourceProvider,
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{
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fn authenticate_all(&self, payload: &Vec<u8>) -> Vec<AuthenticationSource> {
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vec![self.authenticate(payload)]
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}
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}
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impl<A, B> AuthenticationSourceProviders for (A, B)
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where
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A: AuthenticationSourceProvider,
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B: AuthenticationSourceProvider,
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{
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fn authenticate_all(&self, payload: &Vec<u8>) -> Vec<AuthenticationSource> {
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let (first, second) = self;
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vec![first.authenticate(payload), second.authenticate(payload)]
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}
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}
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impl<T: Serialize + Debug + MessageTarget> Authenticated<T> {
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pub fn new(message: T) -> Self {
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Self {
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source: vec![],
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message_type: type_name::<T>().to_string(),
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target_instance: message.target(),
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message,
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}
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}
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pub fn new_for(instance: impl ToOwned<Owned = Instance>, message: T) -> Self {
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Self {
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source: vec![],
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message_type: type_name::<T>().to_string(),
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message,
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target_instance: Some(instance.to_owned()),
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}
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}
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pub fn new_empty(message: T) -> Self {
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Self {
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source: vec![],
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message_type: type_name::<T>().to_string(),
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target_instance: message.target(),
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message,
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}
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}
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pub fn append_authentication<P: AuthenticationSourceProvider + 'static + Send + Sync>(
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&mut self,
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authentication: P,
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) {
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let message_payload = serde_json::to_vec(&self.message).unwrap();
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info!(
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"Verifying payload: {}",
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std::str::from_utf8(&message_payload).unwrap()
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);
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self.source
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.push(Box::new(authentication) as Box<dyn AuthenticationSourceProvider + Send + Sync>);
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}
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pub fn into_payload(self) -> AuthenticatedPayload {
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self.into()
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}
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}
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mod verified {}
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#[derive(Clone, Debug)]
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pub struct UserAuthenticator {
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pub user: User,
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pub token: UserAuthenticationToken,
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}
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impl AuthenticationSourceProvider for UserAuthenticator {
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fn authenticate(&self, _payload: &Vec<u8>) -> AuthenticationSource {
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AuthenticationSource::User {
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user: self.user.clone(),
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token: self.token.clone(),
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}
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}
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}
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#[derive(Debug, Clone)]
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pub struct InstanceAuthenticator {
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pub instance: Instance,
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pub private_key: String,
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}
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impl AuthenticationSourceProvider for InstanceAuthenticator {
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fn authenticate(&self, payload: &Vec<u8>) -> AuthenticationSource {
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let mut rng = rand::thread_rng();
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let private_key = RsaPrivateKey::from_pkcs1_pem(&self.private_key).unwrap();
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let signing_key = SigningKey::<Sha256>::new(private_key);
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let signature = signing_key.sign_with_rng(&mut rng, &payload);
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AuthenticationSource::Instance {
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instance: self.instance.clone(),
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signature: InstanceSignature(signature.to_bytes().into_vec()),
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}
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}
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}
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#[repr(transparent)]
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#[derive(Clone, Debug, Hash, PartialEq, Eq, Serialize, Deserialize)]
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pub struct UserAuthenticationToken(String);
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impl From<String> for UserAuthenticationToken {
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fn from(value: String) -> Self {
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Self(value)
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}
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}
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impl ToString for UserAuthenticationToken {
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fn to_string(&self) -> String {
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self.0.clone()
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}
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}
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impl AsRef<str> for UserAuthenticationToken {
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fn as_ref(&self) -> &str {
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&self.0
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}
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}
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#[derive(Clone, Debug, Hash, PartialEq, Eq, Serialize, Deserialize)]
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pub struct InstanceSignature(Vec<u8>);
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impl AsRef<[u8]> for InstanceSignature {
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fn as_ref(&self) -> &[u8] {
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&self.0
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}
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}
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#[derive(Clone, Debug, Hash, PartialEq, Eq, Serialize, Deserialize)]
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pub enum AuthenticationSource {
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User {
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user: User,
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token: UserAuthenticationToken,
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},
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Instance {
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instance: Instance,
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signature: InstanceSignature,
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},
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}
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|