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improvement: federation get_keys and optimize signingkey storage

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- get encryption keys over federation
- optimize signing key storage
- rate limit parsing of bad events
- rate limit signature fetching
- dependency bumps
This commit is contained in:
Timo Kösters 2021-05-20 23:46:52 +02:00
parent ae41bc5067
commit 09157b2096
No known key found for this signature in database
GPG key ID: 24DA7517711A2BA4
18 changed files with 566 additions and 371 deletions
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92
src/database/globals.rs
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@ -2,20 +2,22 @@ use crate::{database::Config, utils, Error, Result};
use log::{error, info};
use ruma::{
api::federation::discovery::{ServerSigningKeys, VerifyKey},
ServerName, ServerSigningKeyId,
EventId, MilliSecondsSinceUnixEpoch, ServerName, ServerSigningKeyId,
};
use rustls::{ServerCertVerifier, WebPKIVerifier};
use std::{
collections::{BTreeMap, HashMap},
sync::{Arc, RwLock},
time::Duration,
time::{Duration, Instant},
};
use tokio::sync::Semaphore;
use trust_dns_resolver::TokioAsyncResolver;
pub const COUNTER: &str = "c";
type WellKnownMap = HashMap<Box<ServerName>, (String, String)>;
type TlsNameMap = HashMap<String, webpki::DNSName>;
type RateLimitState = (Instant, u32); // Time if last failed try, number of failed tries
#[derive(Clone)]
pub struct Globals {
pub actual_destination_cache: Arc<RwLock<WellKnownMap>>, // actual_destination, host
@ -26,7 +28,10 @@ pub struct Globals {
reqwest_client: reqwest::Client,
dns_resolver: TokioAsyncResolver,
jwt_decoding_key: Option<jsonwebtoken::DecodingKey<'static>>,
pub(super) servertimeout_signingkey: sled::Tree, // ServerName + Timeout Timestamp -> algorithm:key + pubkey
pub(super) server_signingkeys: sled::Tree,
pub bad_event_ratelimiter: Arc<RwLock<BTreeMap<EventId, RateLimitState>>>,
pub bad_signature_ratelimiter: Arc<RwLock<BTreeMap<Vec<String>, RateLimitState>>>,
pub servername_ratelimiter: Arc<RwLock<BTreeMap<Box<ServerName>, Arc<Semaphore>>>>,
}
struct MatrixServerVerifier {
@ -65,7 +70,7 @@ impl ServerCertVerifier for MatrixServerVerifier {
impl Globals {
pub fn load(
globals: sled::Tree,
servertimeout_signingkey: sled::Tree,
server_signingkeys: sled::Tree,
config: Config,
) -> Result<Self> {
let bytes = &*globals
@ -135,8 +140,11 @@ impl Globals {
})?,
actual_destination_cache: Arc::new(RwLock::new(WellKnownMap::new())),
tls_name_override,
servertimeout_signingkey,
server_signingkeys,
jwt_decoding_key,
bad_event_ratelimiter: Arc::new(RwLock::new(BTreeMap::new())),
bad_signature_ratelimiter: Arc::new(RwLock::new(BTreeMap::new())),
servername_ratelimiter: Arc::new(RwLock::new(BTreeMap::new())),
})
}
@ -203,31 +211,21 @@ impl Globals {
/// Remove the outdated keys and insert the new ones.
///
/// This doesn't actually check that the keys provided are newer than the old set.
pub fn add_signing_key(&self, origin: &ServerName, keys: &ServerSigningKeys) -> Result<()> {
let mut key1 = origin.as_bytes().to_vec();
key1.push(0xff);
let mut key2 = key1.clone();
let ts = keys
.valid_until_ts
.duration_since(std::time::UNIX_EPOCH)
.expect("time is valid")
.as_millis() as u64;
key1.extend_from_slice(&ts.to_be_bytes());
key2.extend_from_slice(&(ts + 1).to_be_bytes());
self.servertimeout_signingkey.insert(
key1,
serde_json::to_vec(&keys.verify_keys).expect("ServerSigningKeys are a valid string"),
)?;
self.servertimeout_signingkey.insert(
key2,
serde_json::to_vec(&keys.old_verify_keys)
.expect("ServerSigningKeys are a valid string"),
)?;
pub fn add_signing_key(&self, origin: &ServerName, new_keys: &ServerSigningKeys) -> Result<()> {
self.server_signingkeys
.update_and_fetch(origin.as_bytes(), |signingkeys| {
let mut keys = signingkeys
.and_then(|keys| serde_json::from_slice(keys).ok())
.unwrap_or_else(|| {
// Just insert "now", it doesn't matter
ServerSigningKeys::new(origin.to_owned(), MilliSecondsSinceUnixEpoch::now())
});
keys.verify_keys
.extend(new_keys.verify_keys.clone().into_iter());
keys.old_verify_keys
.extend(new_keys.old_verify_keys.clone().into_iter());
Some(serde_json::to_vec(&keys).expect("serversigningkeys can be serialized"))
})?;
Ok(())
}
@ -237,26 +235,22 @@ impl Globals {
&self,
origin: &ServerName,
) -> Result<BTreeMap<ServerSigningKeyId, VerifyKey>> {
let mut response = BTreeMap::new();
let signingkeys = self
.server_signingkeys
.get(origin.as_bytes())?
.and_then(|bytes| serde_json::from_slice::<ServerSigningKeys>(&bytes).ok())
.map(|keys| {
let mut tree = keys.verify_keys;
tree.extend(
keys.old_verify_keys
.into_iter()
.map(|old| (old.0, VerifyKey::new(old.1.key))),
);
tree
})
.unwrap_or_else(BTreeMap::new);
let now = crate::utils::millis_since_unix_epoch();
for item in self.servertimeout_signingkey.scan_prefix(origin.as_bytes()) {
let (k, bytes) = item?;
let valid_until = k
.splitn(2, |&b| b == 0xff)
.nth(1)
.map(crate::utils::u64_from_bytes)
.ok_or_else(|| Error::bad_database("Invalid signing keys."))?
.map_err(|_| Error::bad_database("Invalid signing key valid until bytes"))?;
// If these keys are still valid use em!
if valid_until > now {
let btree: BTreeMap<_, _> = serde_json::from_slice(&bytes)
.map_err(|_| Error::bad_database("Invalid BTreeMap<> of signing keys"))?;
response.extend(btree);
}
}
Ok(response)
Ok(signingkeys)
}
pub fn database_version(&self) -> Result<u64> {