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|
//! Editor bearer token authentication
use swagger::auth::AuthData;
use macaroon::{Format, Macaroon, Verifier};
use data_encoding::BASE64;
use std::collections::HashMap;
use database_models::*;
use database_schema::*;
use api_helpers::*;
use chrono::prelude::*;
use diesel;
use diesel::prelude::*;
use errors::*;
use std::str::FromStr;
// 32 bytes max (!)
static DUMMY_KEY: &[u8] = b"dummy-key-a-one-two-three-a-la";
#[derive(Clone)]
pub struct AuthContext {
pub editor_id: FatCatId,
editor_row: EditorRow,
roles: Vec<String>, // TODO: BTreeSet
}
impl AuthContext {
pub fn has_role(&self, role: &str) -> bool {
self.roles.contains(&role.to_string()) || self.roles.contains(&"admin".to_string())
}
}
#[derive(Clone)]
pub struct AuthConfectionary {
pub location: String,
pub identifier: String,
pub key: Vec<u8>,
pub root_keys: HashMap<String, Vec<u8>>,
}
impl AuthConfectionary {
pub fn new(location: String, identifier: String, key: Vec<u8>) -> AuthConfectionary {
let mut root_keys = HashMap::new();
root_keys.insert(identifier.clone(), key.clone());
AuthConfectionary {
location: location,
identifier: identifier,
key: key,
root_keys: root_keys,
}
}
pub fn new_dummy() -> AuthConfectionary {
AuthConfectionary::new(
"test.fatcat.wiki".to_string(),
"dummy".to_string(),
DUMMY_KEY.to_vec())
}
pub fn create_token(&self, editor_id: FatCatId, expires: Option<DateTime<Utc>>) -> Result<String> {
let mut mac = Macaroon::create(&self.location, &self.key, &self.identifier).expect("Macaroon creation");
mac.add_first_party_caveat(&format!("editor_id = {}", editor_id.to_string()));
// TODO: put created one second in the past to prevent timing synchronization glitches?
let now = Utc::now().to_rfc3339_opts(SecondsFormat::Secs, true);
mac.add_first_party_caveat(&format!("created = {}", now));
if let Some(expires) = expires {
mac.add_first_party_caveat(&format!("expires = {:?}",
&expires.to_rfc3339_opts(SecondsFormat::Secs, true)));
};
let raw = mac.serialize(Format::V2).expect("macaroon serialization");
Ok(BASE64.encode(&raw))
}
/// On success, returns Some((editor_id, scopes)), where `scopes` is a vector of strings.
pub fn parse_macaroon_token(&self, conn: &DbConn, s: &str) -> Result<EditorRow> {
let raw = BASE64.decode(s.as_bytes())?;
let mac = match Macaroon::deserialize(&raw) {
Ok(m) => m,
Err(e) => bail!("macaroon deserialize error: {:?}", e),
};
let mac = match mac.validate() {
Ok(m) => m,
Err(e) => bail!("macaroon validate error: {:?}", e),
};
let mut verifier = Verifier::new();
let mut editor_id: Option<FatCatId> = None;
for caveat in mac.first_party_caveats() {
if caveat.predicate().starts_with("editor_id = ") {
editor_id = Some(FatCatId::from_str(caveat.predicate().get(12..).unwrap())?);
break
}
}
let editor_id = editor_id.expect("expected an editor_id caveat");
verifier.satisfy_exact(&format!("editor_id = {}", editor_id.to_string()));
let mut created: Option<DateTime<Utc>> = None;
for caveat in mac.first_party_caveats() {
if caveat.predicate().starts_with("created = ") {
created = Some(DateTime::parse_from_rfc3339(caveat.predicate().get(10..).unwrap())
.unwrap()
.with_timezone(&Utc));
break
}
}
let created = created.expect("expected a 'created' caveat");
verifier.satisfy_exact(&format!("created = {}", created.to_rfc3339_opts(SecondsFormat::Secs, true)));
let editor: EditorRow = editor::table
.find(&editor_id.to_uuid())
.get_result(conn)?;
let auth_epoch = DateTime::<Utc>::from_utc(editor.auth_epoch, Utc);
if created < auth_epoch {
bail!("token created before current auth_epoch (was probably revoked by editor)")
}
verifier.satisfy_general(|p: &str| -> bool {
// not expired (based on expires)
if p.starts_with("expires = ") {
let expires: DateTime<Utc> = DateTime::parse_from_rfc3339(p.get(12..).unwrap())
.unwrap()
.with_timezone(&Utc);
expires < Utc::now()
} else {
false
}
});
let verify_key = match self.root_keys.get(mac.identifier()) {
Some(key) => key,
None => bail!("key not found for identifier: {}", mac.identifier()),
};
match mac.verify(verify_key, &mut verifier) {
Ok(true) => (),
Ok(false) => bail!("token overall verification failed"),
Err(e) => bail!("token parsing failed: {:?}", e),
}
Ok(editor)
}
pub fn parse_swagger(&self, conn: &DbConn, auth_data: &Option<AuthData>) -> Result<Option<AuthContext>> {
let token: Option<String> = match auth_data {
Some(AuthData::ApiKey(header)) => {
let header: Vec<String> = header.split_whitespace().map(|s| s.to_string()).collect();
if !(header.len() == 2 && header[0] == "Bearer") {
bail!("invalid Bearer Auth HTTP header");
}
Some(header[1].clone())
},
None => None,
_ => bail!("Authentication HTTP Header should either be empty or a Beaerer API key"),
};
let token = match token {
Some(t) => t,
None => return Ok(None),
};
let editor_row = self.parse_macaroon_token(conn, &token)?;
let roles = if editor_row.is_admin { vec!["admin".to_string()] } else { vec![] };
Ok(Some(AuthContext {
editor_id: FatCatId::from_uuid(&editor_row.id),
editor_row: editor_row,
roles: roles,
}))
}
// TODO: refactor out of this file?
/// Only used from CLI tool
pub fn inspect_token(&self, conn: &DbConn, token: &str) -> Result<()> {
let raw = BASE64.decode(token.as_bytes())?;
let mac = match Macaroon::deserialize(&raw) {
Ok(m) => m,
Err(e) => bail!("macaroon deserialize error: {:?}", e),
};
let now = Utc::now().to_rfc3339_opts(SecondsFormat::Secs, true);
println!("current time: {}", now);
println!("domain (location): {:?}", mac.location());
println!("signing key name (identifier): {}", mac.identifier());
for caveat in mac.first_party_caveats() {
println!("caveat: {}", caveat.predicate());
}
println!("verify: {:?}", self.parse_macaroon_token(conn, token));
Ok(())
}
}
pub fn revoke_tokens(conn: &DbConn, editor_id: FatCatId) -> Result<()>{
diesel::update(editor::table.filter(editor::id.eq(&editor_id.to_uuid())))
.set(editor::auth_epoch.eq(Utc::now()))
.execute(conn)?;
Ok(())
}
pub fn revoke_tokens_everyone(conn: &DbConn) -> Result<()> {
diesel::update(editor::table)
.set(editor::auth_epoch.eq(Utc::now()))
.execute(conn)?;
Ok(())
}
// TODO: refactor out of this file?
/// Only used from CLI tool
pub fn print_editors(conn: &DbConn) -> Result<()>{
// iterate over all editors. format id, print flags, auth_epoch
let all_editors: Vec<EditorRow> = editor::table
.load(conn)?;
println!("editor_id\t\t\tis_admin/is_bot\tauth_epoch\t\t\tusername\twrangler_id");
for e in all_editors {
println!("{}\t{}\t{}\t{}\t{}\t{:?}",
FatCatId::from_uuid(&e.id).to_string(),
e.is_admin,
e.is_bot,
e.auth_epoch,
e.username,
e.wrangler_id,
);
}
Ok(())
}
|
