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// TODO: This whole thing depends on having spice server running...which I do not want
// in a public secd library (or really at all). We will eventually get rid of this in
// favor of a light weight solution that leverages the Zanzibar API but disregards the
// scaling part.
#[allow(clippy::module_inception)]
pub mod spice {
tonic::include_proto!("authzed.api.v1");
}
use spice::permissions_service_client::PermissionsServiceClient;
use spice::schema_service_client::SchemaServiceClient;
use spice::WriteSchemaRequest;
use std::matches;
use tonic::metadata::MetadataValue;
use tonic::transport::Channel;
use tonic::{Request, Response, Status, Streaming};
use crate::auth::z::{self, Subject};
use crate::client::spice::spice::{
relationship_update, ObjectReference, Relationship, RelationshipUpdate, SubjectReference,
};
use self::spice::check_permission_response::Permissionship;
use self::spice::{
consistency, CheckPermissionRequest, Consistency, LookupResourcesRequest,
LookupResourcesResponse, WriteRelationshipsRequest,
};
#[derive(Debug, thiserror::Error, derive_more::Display)]
pub enum SpiceError {
TonicTransport(#[from] tonic::transport::Error),
TonicStatus(#[from] tonic::Status),
}
pub(crate) struct Spice {
channel: Channel,
secret: String,
}
impl Spice {
pub async fn new(secret: String, server: String) -> Self {
let channel = Channel::from_shared(server)
.expect("invalid SPICE_SERVER uri")
.connect()
.await
.expect("initialization error: Spice failed to connect to DB.");
Spice { channel, secret }
}
pub async fn lookup_resources(
&self,
ns: &str,
relation: &str,
subj: &Subject,
) -> Result<Vec<String>, SpiceError> {
let mut client =
PermissionsServiceClient::with_interceptor(self.channel.clone(), |req: Request<()>| {
self.intercept(req)
});
let request = tonic::Request::new(LookupResourcesRequest {
consistency: Some(Consistency {
requirement: Some(consistency::Requirement::MinimizeLatency(true)),
}),
resource_object_type: ns.to_string(),
permission: relation.to_string(),
subject: Some(SubjectReference::from(subj)),
context: None,
});
let mut res = vec![];
let mut response: Streaming<LookupResourcesResponse> =
client.lookup_resources(request).await?.into_inner();
if let Some(d) = response.message().await? {
res.push(d.resource_object_id);
}
Ok(res)
}
pub async fn check_permission(&self, r: &z::Relationship) -> Result<bool, SpiceError> {
let mut client =
PermissionsServiceClient::with_interceptor(self.channel.clone(), |req: Request<()>| {
self.intercept(req)
});
let request = tonic::Request::new(CheckPermissionRequest {
consistency: Some(Consistency {
requirement: Some(consistency::Requirement::MinimizeLatency(true)),
}),
resource: Some(ObjectReference::from(&r.object)),
permission: r.relation.clone(),
subject: Some(SubjectReference::from(&r.subject)),
context: None,
});
let response = client.check_permission(request).await?.into_inner();
Ok(matches!(
Permissionship::from_i32(response.permissionship),
Some(Permissionship::HasPermission)
))
}
pub async fn write_relationship(&self, rs: &[z::Relationship]) -> Result<(), SpiceError> {
let mut client =
PermissionsServiceClient::with_interceptor(self.channel.clone(), |req: Request<()>| {
self.intercept(req)
});
let request = tonic::Request::new(WriteRelationshipsRequest {
updates: rs
.iter()
.map(|t| RelationshipUpdate {
operation: (relationship_update::Operation::Touch as i32),
relationship: Some(Relationship {
resource: Some(ObjectReference::from(&t.object)),
relation: t.relation.clone(),
subject: Some(SubjectReference::from(&t.subject)),
optional_caveat: None,
}),
})
.collect(),
optional_preconditions: vec![],
});
client.write_relationships(request).await?;
Ok(())
}
pub async fn write_schema(&self, schema: &str) -> Result<(), SpiceError> {
let mut client =
SchemaServiceClient::with_interceptor(self.channel.clone(), |req: Request<()>| {
self.intercept(req)
});
let request = tonic::Request::new(WriteSchemaRequest {
schema: schema.into(),
});
client.write_schema(request).await?;
Ok(())
}
fn intercept(&self, mut req: Request<()>) -> Result<Request<()>, Status> {
req.metadata_mut().insert(
"authorization",
MetadataValue::from_str(&format!("Bearer {}", self.secret)).unwrap(),
);
Ok(req)
}
}
impl From<&z::Subject> for SubjectReference {
fn from(s: &z::Subject) -> Self {
let tup = match s {
Subject::User(u) => (u.0.clone(), u.1.clone().to_string(), "".to_string()),
Subject::UserSet { user, relation } => {
(user.0.clone(), user.1.clone().to_string(), relation.clone())
}
};
SubjectReference {
object: Some(ObjectReference {
object_type: tup.0,
object_id: tup.1,
}),
optional_relation: tup.2,
}
}
}
impl From<&z::Object> for ObjectReference {
fn from(o: &z::Object) -> Self {
ObjectReference {
object_type: o.0.clone(),
object_id: o.1.clone().to_string(),
}
}
}
|
