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|
use axum::body::{Body, StreamBody};
use axum::extract::{BodyStream, FromRequest, Path, Query, RequestParts, TypedHeader};
use axum::handler::Handler;
use axum::headers::authorization::Basic;
use axum::headers::Authorization;
use axum::response::{IntoResponse, Response};
use axum::routing::{get, head, post, put};
use axum::{async_trait, Router};
use futures::StreamExt;
use hyper::StatusCode;
use serde::Serialize;
use sha2::{Digest, Sha256};
use std::path::PathBuf;
use tokio::io::AsyncWriteExt;
use tokio_util::io::ReaderStream;
use crate::util::gen_alphanumeric;
use crate::{db, DatabaseConnection};
use crate::db::users::{authenticate_user, Credentials, User};
const REGISTRY_PATH: &str = "./data/registry";
pub fn registry_service() -> Router {
Router::new()
// The docker API requires this trailing slash
.nest("/v2/", registry_api_v2())
.fallback(fallback.into_service())
}
fn registry_api_v2() -> Router {
Router::new()
.route("/", get(get_root))
.route(
"/:name/manifests/:reference",
get(get_manifest).put(put_manifest),
)
.route(
"/:name/blobs/:digest",
head(check_blob_exists).get(get_blob),
)
.route("/:name/blobs/uploads/", post(create_upload))
.route(
"/:name/blobs/uploads/:uuid",
put(put_upload).patch(patch_upload),
)
}
async fn fallback(request: axum::http::Request<Body>) -> impl IntoResponse {
// for debugging
println!("no route for {} {}", request.method(), request.uri());
StatusCode::NOT_FOUND
}
const ADMIN_USERNAME: &str = "admin";
// TODO: put this in some configuration
const ADMIN_PASSWORD: &str = "supersecretpassword";
type AuthorizationHeader = TypedHeader<Authorization<Basic>>;
enum RegistryAuth {
User(User),
Admin,
}
enum RegistryAuthError {
NoAuthHeader,
InvalidCredentials,
}
impl IntoResponse for RegistryAuthError {
fn into_response(self) -> Response {
// TODO: create enum for registry errors
let err = RegistryErrors {
errors: vec![RegistryError {
code: "UNAUTHORIZED".to_string(),
message: "please log in".to_string(),
detail: serde_json::Value::Null,
}],
};
(
StatusCode::UNAUTHORIZED,
[
("Docker-Distribution-API-Version", "registry/2.0"),
("WWW-Authenticate", "Basic"),
],
serde_json::to_string(&err).unwrap(),
)
.into_response()
}
}
#[async_trait]
impl<B> FromRequest<B> for RegistryAuth
where
B: Send,
{
type Rejection = RegistryAuthError;
async fn from_request(req: &mut RequestParts<B>) -> Result<Self, Self::Rejection> {
let TypedHeader(Authorization(basic)) = AuthorizationHeader::from_request(req)
.await
.map_err(|_| RegistryAuthError::NoAuthHeader)?;
// TODO: Into<Credentials> would be nice
let credentials = Credentials {
username: basic.username(),
password: basic.password(),
};
if credentials.username == ADMIN_USERNAME {
if credentials.password == ADMIN_PASSWORD {
Ok(RegistryAuth::Admin)
} else {
Err(RegistryAuthError::InvalidCredentials)
}
} else {
let db_conn = DatabaseConnection::from_request(req).await.unwrap();
let user = authenticate_user(&credentials, &db_conn)
.ok_or(RegistryAuthError::InvalidCredentials)?;
Ok(RegistryAuth::User(user))
}
}
}
// Since async file io just calls spawn_blocking internally, it does not really make sense
// to make this an async function
fn file_sha256_digest(path: &std::path::Path) -> std::io::Result<String> {
let mut file = std::fs::File::open(path)?;
let mut hasher = Sha256::new();
let _n = std::io::copy(&mut file, &mut hasher)?;
Ok(format!("{:x}", hasher.finalize()))
}
async fn get_root(_auth: RegistryAuth) -> impl IntoResponse {
// root should return 200 OK to confirm api compliance
Response::builder()
.status(StatusCode::OK)
.header("Docker-Distribution-API-Version", "registry/2.0")
.body(Body::empty())
.unwrap()
}
#[derive(Serialize)]
pub struct RegistryErrors {
errors: Vec<RegistryError>,
}
#[derive(Serialize)]
pub struct RegistryError {
code: String,
message: String,
detail: serde_json::Value,
}
async fn check_blob_exists(
db_conn: DatabaseConnection,
auth: RegistryAuth,
Path((repository_name, raw_digest)): Path<(String, String)>,
) -> Result<impl IntoResponse, StatusCode> {
check_access(&repository_name, &auth, &db_conn)?;
let digest = raw_digest.strip_prefix("sha256:").unwrap();
let blob_path = PathBuf::from(REGISTRY_PATH).join("sha256").join(&digest);
if blob_path.exists() {
Ok(StatusCode::OK)
} else {
Err(StatusCode::NOT_FOUND)
}
}
async fn get_blob(
db_conn: DatabaseConnection,
auth: RegistryAuth,
Path((repository_name, raw_digest)): Path<(String, String)>,
) -> Result<impl IntoResponse, StatusCode> {
check_access(&repository_name, &auth, &db_conn)?;
let digest = raw_digest.strip_prefix("sha256:").unwrap();
let blob_path = PathBuf::from(REGISTRY_PATH).join("sha256").join(&digest);
if !blob_path.exists() {
return Err(StatusCode::NOT_FOUND);
}
let file = tokio::fs::File::open(&blob_path).await.unwrap();
let reader_stream = ReaderStream::new(file);
let stream_body = StreamBody::new(reader_stream);
Ok(stream_body)
}
async fn create_upload(
db_conn: DatabaseConnection,
auth: RegistryAuth,
Path(repository_name): Path<String>,
) -> Result<impl IntoResponse, StatusCode> {
check_access(&repository_name, &auth, &db_conn)?;
let uuid = gen_alphanumeric(16);
tokio::fs::File::create(PathBuf::from(REGISTRY_PATH).join("uploads").join(&uuid))
.await
.unwrap();
Ok(Response::builder()
.status(StatusCode::ACCEPTED)
.header(
"Location",
format!("/v2/{}/blobs/uploads/{}", repository_name, uuid),
)
.header("Docker-Upload-UUID", uuid)
.header("Range", "bytes=0-0")
.body(Body::empty())
.unwrap())
}
async fn patch_upload(
db_conn: DatabaseConnection,
auth: RegistryAuth,
Path((repository_name, uuid)): Path<(String, String)>,
mut stream: BodyStream,
) -> Result<impl IntoResponse, StatusCode> {
check_access(&repository_name, &auth, &db_conn)?;
// let content_length = headers.get("Content-Length").unwrap();
// let content_range = headers.get("Content-Range").unwrap();
// let content_type = headers.get("Content-Type").unwrap();
// assert!(content_type == "application/octet-stream");
let mut len = 0;
let upload_path = PathBuf::from(REGISTRY_PATH).join("uploads").join(&uuid);
let mut file = tokio::fs::OpenOptions::new()
.read(false)
.write(true)
.append(true)
.create(false)
.open(upload_path)
.await
.unwrap();
while let Some(Ok(chunk)) = stream.next().await {
file.write_all(&chunk).await.unwrap();
len += chunk.len();
}
Ok(Response::builder()
.status(StatusCode::ACCEPTED)
.header(
"Location",
format!("/v2/{}/blobs/uploads/{}", repository_name, uuid),
)
.header("Docker-Upload-UUID", uuid)
.header("Range", format!("0-{}", len))
.body(Body::empty())
.unwrap())
}
use serde::Deserialize;
#[derive(Deserialize)]
struct UploadParams {
digest: String,
}
async fn put_upload(
db_conn: DatabaseConnection,
auth: RegistryAuth,
Path((repository_name, uuid)): Path<(String, String)>,
Query(params): Query<UploadParams>,
mut stream: BodyStream,
) -> Result<impl IntoResponse, StatusCode> {
check_access(&repository_name, &auth, &db_conn)?;
let mut _len = 0;
let upload_path = PathBuf::from(REGISTRY_PATH).join("uploads").join(&uuid);
let mut file = tokio::fs::OpenOptions::new()
.read(false)
.write(true)
.append(true)
.create(false)
.open(&upload_path)
.await
.unwrap();
while let Some(Ok(chunk)) = stream.next().await {
file.write_all(&chunk).await.unwrap();
_len += chunk.len();
}
file.flush().await.unwrap();
let expected_digest = params.digest.strip_prefix("sha256:").unwrap();
let digest = file_sha256_digest(&upload_path).unwrap();
if digest != expected_digest {
// TODO: return a docker error body
return Err(StatusCode::BAD_REQUEST);
}
let target_path = PathBuf::from(REGISTRY_PATH).join("sha256").join(&digest);
tokio::fs::rename(&upload_path, &target_path).await.unwrap();
Ok(Response::builder()
.status(StatusCode::CREATED)
.header(
"Location",
format!("/v2/{}/blobs/{}", repository_name, digest),
)
.header("Docker-Upload-UUID", uuid)
// TODO: set content-range
// .header("Content-Range", format!("0-{}", len))
.header("Docker-Content-Digest", params.digest)
.body(Body::empty())
.unwrap())
}
async fn get_manifest(
db_conn: DatabaseConnection,
auth: RegistryAuth,
Path((repository_name, reference)): Path<(String, String)>,
) -> Result<impl IntoResponse, StatusCode> {
check_access(&repository_name, &auth, &db_conn)?;
let manifest_path = PathBuf::from(REGISTRY_PATH)
.join("manifests")
.join(&repository_name)
.join(&reference)
.with_extension("json");
let data = tokio::fs::read(&manifest_path).await.unwrap();
let manifest: serde_json::Map<String, serde_json::Value> =
serde_json::from_slice(&data).unwrap();
let media_type = manifest.get("mediaType").unwrap().as_str().unwrap();
Ok(Response::builder()
.status(StatusCode::OK)
.header("Content-Type", media_type)
.body(axum::body::Full::from(data))
.unwrap())
}
async fn put_manifest(
db_conn: DatabaseConnection,
auth: RegistryAuth,
Path((repository_name, reference)): Path<(String, String)>,
mut stream: BodyStream,
) -> Result<impl IntoResponse, StatusCode> {
check_access(&repository_name, &auth, &db_conn)?;
let repository_dir = PathBuf::from(REGISTRY_PATH)
.join("manifests")
.join(&repository_name);
tokio::fs::create_dir_all(&repository_dir).await.unwrap();
let mut hasher = Sha256::new();
let manifest_path = repository_dir.join(&reference).with_extension("json");
{
let mut file = tokio::fs::OpenOptions::new()
.write(true)
.create(true)
.truncate(true)
.open(&manifest_path)
.await
.unwrap();
while let Some(Ok(chunk)) = stream.next().await {
hasher.update(&chunk);
file.write_all(&chunk).await.unwrap();
}
}
let digest = hasher.finalize();
// TODO: store content-adressable manifests separately
let content_digest = format!("sha256:{:x}", digest);
let digest_path = repository_dir.join(&content_digest).with_extension("json");
tokio::fs::copy(manifest_path, digest_path).await.unwrap();
Ok(Response::builder()
.status(StatusCode::CREATED)
.header(
"Location",
format!("/v2/{}/manifests/{}", repository_name, reference),
)
.header("Docker-Content-Digest", content_digest)
.body(Body::empty())
.unwrap())
}
/// Ensure that the accessed repository exists
/// and the user is allowed to access ti
fn check_access(
repository_name: &str,
auth: &RegistryAuth,
db_conn: &DatabaseConnection,
) -> Result<(), StatusCode> {
use diesel::OptionalExtension;
// TODO: it would be nice to provide the found repository
// to the route handlers
let bot = db::bots::find_bot_by_name(repository_name, db_conn)
.optional()
.expect("could not run query")
.ok_or(StatusCode::NOT_FOUND)?;
match &auth {
RegistryAuth::Admin => Ok(()),
RegistryAuth::User(user) => {
if bot.owner_id == Some(user.id) {
Ok(())
} else {
Err(StatusCode::FORBIDDEN)
}
}
}
}
|
