Stuff to make work

examples/bffh.dhall

@@ -39,4 +39,5 @@
     }
   }
 , mqtt_url = "tcp://localhost:1883" 
+, db_path = "/tmp/bffh"
 }

src/api.rs

@@ -13,9 +13,11 @@ use crate::network::Network;
 pub mod auth;
 mod machine;
 mod machines;
-
 use machines::Machines;
 
+mod users;
+use users::Users;
+
 // TODO Session restoration by making the Bootstrap cap a SturdyRef
 pub struct Bootstrap {
     session: Arc<Session>,
@@ -45,13 +47,6 @@ impl connection_capnp::bootstrap::Server for Bootstrap {
         Promise::ok(())
     }
 
-    fn permission_system(&mut self,
-        _: PermissionSystemParams,
-        _: PermissionSystemResults
-    ) -> Promise<(), capnp::Error> {
-        Promise::ok(())
-    }
-
     fn machine_system(&mut self,
         _: MachineSystemParams,
         mut res: MachineSystemResults
@@ -65,6 +60,11 @@ impl connection_capnp::bootstrap::Server for Bootstrap {
                 let perms = accessdb.collect_permrules(&user.data)
                     .map_err(|e| capnp::Error::failed(format!("AccessDB lookup failed: {}", e)))?;
 
+                debug!(session.log, "Giving MachineSystem cap to user {} with perms:", user.id);
+                for r in perms.iter() {
+                    debug!(session.log, "   {}", r);
+                }
+
                 // TODO actual permission check and stuff
                 //      Right now we only check that the user has authenticated at all.
                 let c = capnp_rpc::new_client(Machines::new(user.id, perms, nw));
@@ -78,5 +78,31 @@ impl connection_capnp::bootstrap::Server for Bootstrap {
 
         Promise::from_future(f)
     }
-}
 
+    fn user_system(
+        &mut self,
+        _: UserSystemParams,
+        mut results: UserSystemResults
+    ) -> Promise<(), capnp::Error> {
+        let session = self.session.clone();
+        let accessdb = self.db.access.clone();
+        let f = async move {
+            // Ensure the lock is dropped as soon as possible
+            if let Some(user) = { session.user.lock().await.clone() } {
+                let perms = accessdb.collect_permrules(&user.data)
+                    .map_err(|e| capnp::Error::failed(format!("AccessDB lookup failed: {}", e)))?;
+
+                // TODO actual permission check and stuff
+                //      Right now we only check that the user has authenticated at all.
+                let c = capnp_rpc::new_client(Users::new(perms));
+                results.get().set_user_system(c);
+            }
+
+            // Promise is Ok either way, just the machine system may not be set, indicating as
+            // usual a lack of permission.
+            Ok(())
+        };
+
+        Promise::from_future(f)
+    }
+}

src/api/users.rs

@@ -0,0 +1,43 @@
+use capnp::capability::Promise;
+
+use crate::db::access::{PermRule, Permission};
+use crate::schema::usersystem_capnp::user_system;
+use crate::schema::usersystem_capnp::user_system::{info, manage};
+
+#[derive(Clone, Debug)]
+pub struct Users {
+    perms: Vec<PermRule>,
+}
+
+impl Users {
+    pub fn new(perms: Vec<PermRule>) -> Self {
+        Self { perms }
+    }
+}
+
+impl user_system::Server for Users {
+    fn info(
+        &mut self,
+        _: user_system::InfoParams,
+        _: user_system::InfoResults,
+    ) -> Promise<(), capnp::Error> {
+        Promise::ok(())
+    }
+
+    fn manage(
+        &mut self,
+        _: user_system::ManageParams,
+        mut results: user_system::ManageResults,
+    ) -> Promise<(), capnp::Error> {
+        let perm: &Permission = Permission::new("bffh.users.manage");
+        if self.perms.iter().any(|rule| rule.match_perm(perm)) {
+            results.get().set_manage(capnp_rpc::new_client(self.clone()));
+        }
+
+        Promise::ok(())
+    }
+}
+
+impl info::Server for Users {}
+
+impl manage::Server for Users {}

src/config.rs

@@ -1,5 +1,5 @@
 use std::default::Default;
-use std::path::Path;
+use std::path::{Path, PathBuf};
 use std::collections::HashMap;
 
 use serde::{Serialize, Deserialize};
@@ -36,6 +36,8 @@ pub struct Config {
 
     pub actor_connections: Box<[(String, String)]>,
     pub init_connections: Box<[(String, String)]>,
+
+    pub db_path: PathBuf,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -83,9 +85,9 @@ impl Default for Config {
                     port: Some(DEFAULT_PORT),
                 }
             ]),
-            machines: machines,
-            actors: actors,
-            initiators: initiators,
+            machines,
+            actors,
+            initiators,
             mqtt_url: "tcp://localhost:1883".to_string(),
             actor_connections: Box::new([
                 ("Testmachine".to_string(), "Actor".to_string()),
@@ -93,6 +95,8 @@ impl Default for Config {
             init_connections: Box::new([
                 ("Initiator".to_string(), "Testmachine".to_string()),
             ]),
+
+            db_path: PathBuf::from("/run/bffh/database"),
         }
     }
 }

src/db.rs

@@ -42,7 +42,7 @@ impl Databases {
         let env = lmdb::Environment::new()
             .set_flags(lmdb::EnvironmentFlags::MAP_ASYNC | lmdb::EnvironmentFlags::NO_SUB_DIR)
             .set_max_dbs(LMDB_MAX_DB as libc::c_uint)
-            .open(&PathBuf::from_str("/tmp/a.db").unwrap())?;
+            .open(config.db_path.as_path())?;
 
         // Start loading the machine database, authentication system and permission system
         // All of those get a custom logger so the source of a log message can be better traced and

src/db/access.rs

@@ -186,6 +186,31 @@ impl Role {
     }
 }
 
+impl fmt::Display for Role {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "parents:")?;
+        if self.parents.is_empty() {
+            writeln!(f, " []")?;
+        } else {
+            writeln!(f, "")?;
+            for p in self.parents.iter() {
+                writeln!(f, "  - {}", p)?;
+            }
+        }
+        write!(f, "permissions:")?;
+        if self.permissions.is_empty() {
+            writeln!(f, " []")?;
+        } else {
+            writeln!(f, "")?;
+            for p in self.permissions.iter() {
+                writeln!(f, "  - {}", p)?;
+            }
+        }
+
+        Ok(())
+    }
+}
+
 type SourceID = String;
 
 fn split_once(s: &str, split: char) -> Option<(&str, &str)> {
@@ -454,7 +479,7 @@ pub enum PermRule {
 
 impl PermRule {
     // Does this rule match that permission
-    pub fn match_perm<P: AsRef<Permission>>(&self, perm: &P) -> bool {
+    pub fn match_perm<P: AsRef<Permission> + ?Sized>(&self, perm: &P) -> bool {
         match self {
             PermRule::Base(ref base) => base.as_permission() == perm.as_ref(),
             PermRule::Children(ref parent) => parent.as_permission() > perm.as_ref() ,

src/db/access/internal.rs

@@ -69,16 +69,15 @@ impl Internal {
                 roles.insert(role_id.clone(), role);
             }
         } else {
-            info!(self.log, "Did not find role {} while trying to tally", role_id);
+            warn!(self.log, "Did not find role {} while trying to tally", role_id);
         }
 
         Ok(())
     }
 
     pub fn _get_role<'txn, T: Transaction>(&self, txn: &'txn T, role_id: &RoleIdentifier) -> Result<Option<Role>> {
-        let string = format!("{}", role_id);
-        debug!(self.log, "Reading role '{}'", &string);
-        match txn.get(self.roledb, &string.as_bytes()) {
+        debug!(self.log, "Reading role '{}'", role_id.name);
+        match txn.get(self.roledb, &role_id.name.as_bytes()) {
             Ok(bytes) => {
                 Ok(Some(flexbuffers::from_slice(bytes)?))
             },
@@ -89,8 +88,7 @@ impl Internal {
 
     fn put_role(&self, txn: &mut RwTransaction, role_id: &RoleIdentifier, role: Role) -> Result<()> {
         let bytes = flexbuffers::to_vec(role)?;
-        let string = format!("{}", role_id);
-        txn.put(self.roledb, &string.as_bytes(), &bytes, lmdb::WriteFlags::empty())?;
+        txn.put(self.roledb, &role_id.name.as_bytes(), &bytes, lmdb::WriteFlags::empty())?;
 
         Ok(())
     }
@@ -107,8 +105,8 @@ impl Internal {
         for r in cursor.iter_start() {
             match r {
                 Ok( (k,v) ) => {
-                    let role_id_str = unsafe { std::str::from_utf8_unchecked(k) };
-                    let role_id = role_id_str.parse::<RoleIdentifier>().unwrap();
+                    let role_name_str = unsafe { std::str::from_utf8_unchecked(k) };
+                    let role_id = RoleIdentifier::local_from_str(role_name_str.to_string(), "lmdb".to_string());
                     match flexbuffers::from_slice(v) {
                         Ok(role) => vec.push((role_id, role)),
                         Err(e) => error!(self.log, "Bad format for roleid {}: {}", role_id, e),
@@ -126,7 +124,7 @@ impl Internal {
         self.load_roles_txn(&mut txn, path.as_ref())?;
 
         // In case the above didn't error, commit.
-        txn.commit();
+        txn.commit()?;
         Ok(())
     }
     fn load_roles_txn(&self, txn: &mut RwTransaction, path: &Path) -> Result<()> {

src/main.rs

@@ -141,8 +141,10 @@ fn maybe(matches: clap::ArgMatches, log: Arc<Logger>) -> Result<(), Error> {
 
     if matches.is_present("dump") {
         let db = db::Databases::new(&log, &config)?;
-        let v = db.access.dump_roles();
-        info!(log, "Roles {:?}", v);
+        let v = db.access.dump_roles().unwrap();
+        for (id, role) in v.iter() {
+            info!(log, "Role {}:\n{}", id, role);
+        }
         Ok(())
     } else if matches.is_present("load") {
         let db = db::Databases::new(&log, &config)?;