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Code Issues Releases Wiki Activity

Authentication: Refactor authentication check to work for tenant token even without an index in URL

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Callers need to manually check `is_index_authorized` when using the route without an index in URL
This commit is contained in:
Louis Dureuil 2023-02-17 11:30:34 +01:00
parent 10d4a1a9af
commit 4b65851793
No known key found for this signature in database
1 changed files with 61 additions and 48 deletions
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109
meilisearch/src/extractors/authentication/mod.rs
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@ -136,6 +136,13 @@ pub mod policies {
use crate::extractors::authentication::Policy;
enum TenantTokenOutcome {
NotATenantToken,
Invalid,
Expired,
Valid(Uuid, SearchRules),
}
fn tenant_token_validation() -> Validation {
let mut validation = Validation::default();
validation.validate_exp = false;
@ -164,29 +171,42 @@ pub mod policies {
pub struct ActionPolicy<const A: u8>;
impl<const A: u8> Policy for ActionPolicy<A> {
/// Attempts to grant authentication from a bearer token (that can be a tenant token or an API key), the requested Action,
/// and a list of requested indexes.
///
/// If the bearer token is not allowed for the specified indexes and action, returns `None`.
/// Otherwise, returns an object containing the generated permissions: the search filters to add to a search, and the list of allowed indexes
/// (that may contain more indexes than requested).
fn authenticate(
auth: AuthController,
token: &str,
index: Option<&str>,
) -> Option<AuthFilter> {
// authenticate if token is the master key.
// master key can only have access to keys routes.
// if master key is None only keys routes are inaccessible.
// Without a master key, all routes are accessible except the key-related routes.
if auth.get_master_key().map_or_else(|| !is_keys_action(A), |mk| mk == token) {
return Some(AuthFilter::default());
}
// Tenant token
if let Some(filters) = ActionPolicy::<A>::authenticate_tenant_token(&auth, token, index)
{
return Some(filters);
} else if let Some(action) = Action::from_repr(A) {
// API key
if let Ok(Some(uid)) = auth.get_optional_uid_from_encoded_key(token.as_bytes()) {
if let Ok(true) = auth.is_key_authorized(uid, action, index) {
return auth.get_key_filters(uid, None).ok();
let (key_uuid, search_rules) =
match ActionPolicy::<A>::authenticate_tenant_token(&auth, token) {
TenantTokenOutcome::Valid(key_uuid, search_rules) => {
(key_uuid, Some(search_rules))
}
}
TenantTokenOutcome::Expired => return None,
TenantTokenOutcome::Invalid => return None,
TenantTokenOutcome::NotATenantToken => {
(auth.get_optional_uid_from_encoded_key(token.as_bytes()).ok()??, None)
}
};
// check that the indexes are allowed
let action = Action::from_repr(A)?;
let auth_filter = auth.get_key_filters(key_uuid, search_rules).ok()?;
if auth.is_key_authorized(key_uuid, action, index).unwrap_or(false)
&& index.map(|index| auth_filter.is_index_authorized(index)).unwrap_or(true)
{
return Some(auth_filter);
}
None
@ -194,50 +214,43 @@ pub mod policies {
}
impl<const A: u8> ActionPolicy<A> {
fn authenticate_tenant_token(
auth: &AuthController,
token: &str,
index: Option<&str>,
) -> Option<AuthFilter> {
// A tenant token only has access to the search route which always defines an index.
let index = index?;
fn authenticate_tenant_token(auth: &AuthController, token: &str) -> TenantTokenOutcome {
// Only search action can be accessed by a tenant token.
if A != actions::SEARCH {
return None;
return TenantTokenOutcome::NotATenantToken;
}
let uid = extract_key_id(token)?;
// check if parent key is authorized to do the action.
if auth.is_key_authorized(uid, Action::Search, Some(index)).ok()? {
// Check if tenant token is valid.
let key = auth.generate_key(uid)?;
let data = decode::<Claims>(
token,
&DecodingKey::from_secret(key.as_bytes()),
&tenant_token_validation(),
)
.ok()?;
let uid = if let Some(uid) = extract_key_id(token) {
uid
} else {
return TenantTokenOutcome::NotATenantToken;
};
// Check index access if an index restriction is provided.
if !data.claims.search_rules.is_index_authorized(index) {
return None;
// Check if tenant token is valid.
let key = if let Some(key) = auth.generate_key(uid) {
key
} else {
return TenantTokenOutcome::Invalid;
};
let data = if let Ok(data) = decode::<Claims>(
token,
&DecodingKey::from_secret(key.as_bytes()),
&tenant_token_validation(),
) {
data
} else {
return TenantTokenOutcome::Invalid;
};
// Check if token is expired.
if let Some(exp) = data.claims.exp {
if OffsetDateTime::now_utc().unix_timestamp() > exp {
return TenantTokenOutcome::Expired;
}
// Check if token is expired.
if let Some(exp) = data.claims.exp {
if OffsetDateTime::now_utc().unix_timestamp() > exp {
return None;
}
}
return match auth.get_key_filters(uid, Some(data.claims.search_rules)) {
Ok(auth) if auth.search_rules.is_index_authorized(index) => Some(auth),
_ => None,
};
}
None
TenantTokenOutcome::Valid(uid, data.claims.search_rules)
}
}