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|
use serde::{Deserialize, Serialize};
use garage_table::crdt::*;
use garage_table::*;
use model010::key_table as prev;
#[derive(PartialEq, Clone, Debug, Serialize, Deserialize)]
pub struct Key {
// Primary key
pub key_id: String,
// Associated secret key (immutable)
pub secret_key: String,
// Name
pub name: crdt::LWW<String>,
// Deletion
pub deleted: crdt::Bool,
// Authorized keys
pub authorized_buckets: crdt::LWWMap<String, PermissionSet>,
// CRDT interaction: deleted implies authorized_buckets is empty
}
impl Key {
pub fn new(name: String) -> Self {
let key_id = format!("GK{}", hex::encode(&rand::random::<[u8; 12]>()[..]));
let secret_key = hex::encode(&rand::random::<[u8; 32]>()[..]);
Self {
key_id,
secret_key,
name: crdt::LWW::new(name),
deleted: crdt::Bool::new(false),
authorized_buckets: crdt::LWWMap::new(),
}
}
pub fn delete(key_id: String) -> Self {
Self {
key_id,
secret_key: "".into(),
name: crdt::LWW::new("".to_string()),
deleted: crdt::Bool::new(true),
authorized_buckets: crdt::LWWMap::new(),
}
}
/// Add an authorized bucket, only if it wasn't there before
pub fn allow_read(&self, bucket: &str) -> bool {
self.authorized_buckets
.get(&bucket.to_string())
.map(|x| x.allow_read)
.unwrap_or(false)
}
pub fn allow_write(&self, bucket: &str) -> bool {
self.authorized_buckets
.get(&bucket.to_string())
.map(|x| x.allow_write)
.unwrap_or(false)
}
}
#[derive(PartialOrd, Ord, PartialEq, Eq, Clone, Debug, Serialize, Deserialize)]
pub struct PermissionSet {
pub allow_read: bool,
pub allow_write: bool,
}
impl AutoCRDT for PermissionSet {
const WARN_IF_DIFFERENT: bool = true;
}
impl Entry<EmptyKey, String> for Key {
fn partition_key(&self) -> &EmptyKey {
&EmptyKey
}
fn sort_key(&self) -> &String {
&self.key_id
}
}
impl CRDT for Key {
fn merge(&mut self, other: &Self) {
self.name.merge(&other.name);
self.deleted.merge(&other.deleted);
if self.deleted.get() {
self.authorized_buckets.clear();
} else {
self.authorized_buckets.merge(&other.authorized_buckets);
}
}
}
pub struct KeyTable;
impl TableSchema for KeyTable {
type P = EmptyKey;
type S = String;
type E = Key;
type Filter = DeletedFilter;
fn matches_filter(entry: &Self::E, filter: &Self::Filter) -> bool {
filter.apply(entry.deleted.get())
}
fn try_migrate(bytes: &[u8]) -> Option<Self::E> {
let old = match rmp_serde::decode::from_read_ref::<_, prev::Key>(bytes) {
Ok(x) => x,
Err(_) => return None,
};
let mut new = Self::E {
key_id: old.key_id.clone(),
secret_key: old.secret_key.clone(),
name: crdt::LWW::migrate_from_raw(old.name_timestamp, old.name.clone()),
deleted: crdt::Bool::new(old.deleted),
authorized_buckets: crdt::LWWMap::new(),
};
for ab in old.authorized_buckets() {
let it = crdt::LWWMap::migrate_from_raw_item(
ab.bucket.clone(),
ab.timestamp,
PermissionSet {
allow_read: ab.allow_read,
allow_write: ab.allow_write,
},
);
new.authorized_buckets.merge(&it);
}
Some(new)
}
}
|
