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|
use std::collections::HashMap;
use std::sync::Arc;
use hyper::{body::HttpBody, 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 = req.into_body().collect().await?.to_bytes();
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 {
// Check user is allowed to create bucket
if !key_params.allow_create_bucket.get() {
return Err(CommonError::Forbidden(format!(
"Access key {} is not allowed to create buckets",
api_key.key_id
))
.into());
}
// 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.is_some() {
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
);
}
}
|
