use std::collections::HashMap; use std::sync::Arc; use hyper::{Body, Request, Response, StatusCode}; use garage_model::bucket_alias_table::*; use garage_model::bucket_table::Bucket; use garage_model::garage::Garage; use garage_model::key_table::Key; use garage_model::permission::BucketKeyPerm; use garage_table::util::*; use garage_util::crdt::*; use garage_util::data::*; use garage_util::time::*; use crate::common_error::CommonError; use crate::s3::error::*; use crate::s3::xml as s3_xml; use crate::signature::verify_signed_content; pub fn handle_get_bucket_location(garage: Arc<Garage>) -> Result<Response<Body>, Error> { let loc = s3_xml::LocationConstraint { xmlns: (), region: garage.config.s3_api.s3_region.to_string(), }; let xml = s3_xml::to_xml_with_header(&loc)?; Ok(Response::builder() .header("Content-Type", "application/xml") .body(Body::from(xml.into_bytes()))?) } pub fn handle_get_bucket_versioning() -> Result<Response<Body>, Error> { let versioning = s3_xml::VersioningConfiguration { xmlns: (), status: None, }; let xml = s3_xml::to_xml_with_header(&versioning)?; Ok(Response::builder() .header("Content-Type", "application/xml") .body(Body::from(xml.into_bytes()))?) } pub async fn handle_list_buckets(garage: &Garage, api_key: &Key) -> Result<Response<Body>, Error> { let key_p = api_key.params().ok_or_internal_error( "Key should not be in deleted state at this point (in handle_list_buckets)", )?; // Collect buckets user has access to let ids = api_key .state .as_option() .unwrap() .authorized_buckets .items() .iter() .filter(|(_, perms)| perms.is_any()) .map(|(id, _)| *id) .collect::<Vec<_>>(); let mut buckets_by_id = HashMap::new(); let mut aliases = HashMap::new(); for bucket_id in ids.iter() { let bucket = garage.bucket_table.get(&EmptyKey, bucket_id).await?; if let Some(bucket) = bucket { for (alias, _, _active) in bucket.aliases().iter().filter(|(_, _, active)| *active) { let alias_opt = garage.bucket_alias_table.get(&EmptyKey, alias).await?; if let Some(alias_ent) = alias_opt { if *alias_ent.state.get() == Some(*bucket_id) { aliases.insert(alias_ent.name().to_string(), *bucket_id); } } } if let Deletable::Present(param) = bucket.state { buckets_by_id.insert(bucket_id, param); } } } for (alias, _, id_opt) in key_p.local_aliases.items() { if let Some(id) = id_opt { aliases.insert(alias.clone(), *id); } } // Generate response let list_buckets = s3_xml::ListAllMyBucketsResult { owner: s3_xml::Owner { display_name: s3_xml::Value(key_p.name.get().to_string()), id: s3_xml::Value(api_key.key_id.to_string()), }, buckets: s3_xml::BucketList { entries: aliases .iter() .filter_map(|(name, id)| buckets_by_id.get(id).map(|p| (name, id, p))) .map(|(name, _id, param)| s3_xml::Bucket { creation_date: s3_xml::Value(msec_to_rfc3339(param.creation_date)), name: s3_xml::Value(name.to_string()), }) .collect(), }, }; let xml = s3_xml::to_xml_with_header(&list_buckets)?; trace!("xml: {}", xml); Ok(Response::builder() .header("Content-Type", "application/xml") .body(Body::from(xml))?) } pub async fn handle_create_bucket( garage: &Garage, req: Request<Body>, content_sha256: Option<Hash>, api_key: Key, bucket_name: String, ) -> Result<Response<Body>, Error> { let body = hyper::body::to_bytes(req.into_body()).await?; if let Some(content_sha256) = content_sha256 { verify_signed_content(content_sha256, &body[..])?; } let cmd = parse_create_bucket_xml(&body[..]).ok_or_bad_request("Invalid create bucket XML query")?; if let Some(location_constraint) = cmd { if location_constraint != garage.config.s3_api.s3_region { return Err(Error::bad_request(format!( "Cannot satisfy location constraint `{}`: buckets can only be created in region `{}`", location_constraint, garage.config.s3_api.s3_region ))); } } let key_params = api_key .params() .ok_or_internal_error("Key should not be deleted at this point")?; let existing_bucket = if let Some(Some(bucket_id)) = key_params.local_aliases.get(&bucket_name) { Some(*bucket_id) } else { garage .bucket_helper() .resolve_global_bucket_name(&bucket_name) .await? }; if let Some(bucket_id) = existing_bucket { // Check we have write or owner permission on the bucket, // in that case it's fine, return 200 OK, bucket exists; // otherwise return a forbidden error. let kp = api_key.bucket_permissions(&bucket_id); if !(kp.allow_write || kp.allow_owner) { return Err(CommonError::BucketAlreadyExists.into()); } } else { // Create the bucket! if !is_valid_bucket_name(&bucket_name) { return Err(Error::bad_request(format!( "{}: {}", bucket_name, INVALID_BUCKET_NAME_MESSAGE ))); } let bucket = Bucket::new(); garage.bucket_table.insert(&bucket).await?; garage .bucket_helper() .set_bucket_key_permissions(bucket.id, &api_key.key_id, BucketKeyPerm::ALL_PERMISSIONS) .await?; garage .bucket_helper() .set_local_bucket_alias(bucket.id, &api_key.key_id, &bucket_name) .await?; } Ok(Response::builder() .header("Location", format!("/{}", bucket_name)) .body(Body::empty()) .unwrap()) } pub async fn handle_delete_bucket( garage: &Garage, bucket_id: Uuid, bucket_name: String, api_key: Key, ) -> Result<Response<Body>, Error> { let key_params = api_key .params() .ok_or_internal_error("Key should not be deleted at this point")?; let is_local_alias = matches!(key_params.local_aliases.get(&bucket_name), Some(Some(_))); let mut bucket = garage .bucket_helper() .get_existing_bucket(bucket_id) .await?; let bucket_state = bucket.state.as_option().unwrap(); // If the bucket has no other aliases, this is a true deletion. // Otherwise, it is just an alias removal. let has_other_global_aliases = bucket_state .aliases .items() .iter() .filter(|(_, _, active)| *active) .any(|(n, _, _)| is_local_alias || (*n != bucket_name)); let has_other_local_aliases = bucket_state .local_aliases .items() .iter() .filter(|(_, _, active)| *active) .any(|((k, n), _, _)| !is_local_alias || *n != bucket_name || *k != api_key.key_id); if !has_other_global_aliases && !has_other_local_aliases { // Delete bucket // Check bucket is empty if !garage.bucket_helper().is_bucket_empty(bucket_id).await? { return Err(CommonError::BucketNotEmpty.into()); } // --- done checking, now commit --- // 1. delete bucket alias if is_local_alias { garage .bucket_helper() .unset_local_bucket_alias(bucket_id, &api_key.key_id, &bucket_name) .await?; } else { garage .bucket_helper() .unset_global_bucket_alias(bucket_id, &bucket_name) .await?; } // 2. delete authorization from keys that had access for (key_id, _) in bucket.authorized_keys() { garage .bucket_helper() .set_bucket_key_permissions(bucket.id, key_id, BucketKeyPerm::NO_PERMISSIONS) .await?; } // 3. delete bucket bucket.state = Deletable::delete(); garage.bucket_table.insert(&bucket).await?; } else if is_local_alias { // Just unalias garage .bucket_helper() .unset_local_bucket_alias(bucket_id, &api_key.key_id, &bucket_name) .await?; } else { // Just unalias (but from global namespace) garage .bucket_helper() .unset_global_bucket_alias(bucket_id, &bucket_name) .await?; } Ok(Response::builder() .status(StatusCode::NO_CONTENT) .body(Body::empty())?) } fn parse_create_bucket_xml(xml_bytes: &[u8]) -> Option<Option<String>> { // Returns None if invalid data // Returns Some(None) if no location constraint is given // Returns Some(Some("xxxx")) where xxxx is the given location constraint let xml_str = std::str::from_utf8(xml_bytes).ok()?; if xml_str.trim_matches(char::is_whitespace).is_empty() { return Some(None); } let xml = roxmltree::Document::parse(xml_str).ok()?; let cbc = xml.root().first_child()?; if !cbc.has_tag_name("CreateBucketConfiguration") { return None; } let mut ret = None; for item in cbc.children() { if item.has_tag_name("LocationConstraint") { if ret != None { return None; } ret = Some(item.text()?.to_string()); } else if !item.is_text() { return None; } } Some(ret) } #[cfg(test)] mod tests { use super::*; #[test] fn create_bucket() { assert_eq!(parse_create_bucket_xml(br#""#), Some(None)); assert_eq!( parse_create_bucket_xml( br#" <CreateBucketConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/"> </CreateBucketConfiguration > "# ), Some(None) ); assert_eq!( parse_create_bucket_xml( br#" <CreateBucketConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/"> <LocationConstraint>Europe</LocationConstraint> </CreateBucketConfiguration > "# ), Some(Some("Europe".into())) ); assert_eq!( parse_create_bucket_xml( br#" <CreateBucketConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/"> </Crea > "# ), None ); } }