Initial commit
Diff
.gitignore | 2 +-
Cargo.lock | 1787 ++++++++++++++++++++++++++++++++++++++++++++-
Cargo.toml | 30 +-
LICENSE | 14 +-
README.md | 49 +-
src/main.rs | 267 +++++++-
src/protocol/codec.rs | 136 +++-
src/protocol/high_level.rs | 165 ++++-
src/protocol/low_level.rs | 323 ++++++++-
src/protocol/mod.rs | 4 +-
src/protocol/packet_line.rs | 71 ++-
src/providers/gitlab.rs | 215 +++++-
src/providers/mod.rs | 37 +-
src/util.rs | 18 +-
14 files changed, 3118 insertions(+)
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name = "yasna"
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name = "zeroize"
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@@ -0,0 +1,30 @@
[package]
name = "git-server"
version = "0.1.0"
edition = "2021"
[dependencies]
anyhow = "1"
async-trait = "0.1"
arrayvec = "0.7"
base64 = "0.13"
bytes = "1.1"
flate2 = "1.0"
futures = "0.3"
hex = "0.4"
itoa = "1.0"
indexmap = "1.8"
indoc = "1.0"
parse_link_header = "0.3"
percent-encoding = "2.1"
reqwest = { version = "0.11", features = ["json"] }
serde = { version = "1.0", features = ["derive"] }
sha1 = "0.10"
shlex = "1.1"
thrussh = "0.33"
thrussh-keys = "0.21"
time = "0.3"
tokio = { version = "1.17", features = ["full"] }
tokio-util = { version = "0.7", features = ["codec"] }
@@ -0,0 +1,14 @@
DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
Version 2, December 2004
Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
Everyone is permitted to copy and distribute verbatim or modified
copies of this license document, and changing it is allowed as long
as the name is changed.
DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. You just DO WHAT THE FUCK YOU WANT TO.
@@ -0,0 +1,49 @@
# gitlab-cargo-shim
Say goodbye to your Git dependencies, `gitlab-cargo-shim` is an SSH server
that serves crates just like a standard Cargo registry but from a
[GitLab package registry][gitlab-package-registry], allowing you to use
your private dependencies like any other dependency. No more `git push --force`s
breaking your builds & proper versioning in one simple little binary.
Access controls work just like they do in GitLab, builds are scoped to
users - if they don't have permission to the dependency they can't build
it, it's that simple.
Users are identified by their SSH keys when connecting to the server and
will be authenticated to the GitLab API via an [impersonation token][imp-token],
builds will insert their token as a username to the SSH server and the
shim will use that to call the GitLab API.
To publish simply run `cargo package` and push the resulting `.crate` file
to the GitLab package repository with a semver-compatible version string, to
consume the package simply configure your `.cargo/config.toml` and `Cargo.toml`
accordingly.
```toml
# .cargo/config.toml
[registries]
my-gitlab-group = { index = "ssh://gitlab-cargo-shim.local/my-gitlab-group" }
# Cargo.toml
[dependencies]
my-crate = { version = "0.1", registry = "my-gitlab-group" }
```
In your CI build, setup a `before_script` step to replace the connection string
with one containing the CI token:
```yaml
# .gitlab-ci.yml
before_script:
- sed -i "s/(gitlab-cargo-shim.local)/gitlab-ci-token:$GITLAB-CI-TOKEN@\1/" .cargo/config.toml
```
(or add the corresponding [environment variable][envvar])
It's that easy. Go forth and enjoy your newfound quality of life improvements,
Rustacean.
[gitlab-package-registry]: https://docs.gitlab.com/ee/user/packages/package_registry/index.html
[imp-token]: https://docs.gitlab.com/ee/api/index.html#impersonation-tokens
[envvar]: https://doc.rust-lang.org/cargo/reference/registries.html#using-an-alternate-registry
@@ -0,0 +1,267 @@
pub mod protocol;
pub mod providers;
pub mod util;
use crate::{providers::{gitlab::Gitlab, PackageProvider, Release, User, UserProvider}, protocol::{codec::Encoder, packet_line::PktLine}};
use futures::Future;
use std::{net::SocketAddr, pin::Pin, sync::Arc, fmt::Write};
use bytes::BytesMut;
use thrussh::{server::{Auth, Session}, ChannelId, CryptoVec};
use thrussh_keys::key::PublicKey;
use tokio::task::JoinHandle;
use tokio_util::codec::Encoder as CodecEncoder;
use crate::protocol::high_level::GitRepository;
const AGENT: &str = concat!(
"agent=",
env!("CARGO_PKG_NAME"),
"/",
env!("CARGO_PKG_VERSION"),
"\n"
);
#[tokio::main]
async fn main() -> anyhow::Result<()> {
let ed25519_key = thrussh_keys::key::KeyPair::generate_ed25519().unwrap();
let thrussh_config = Arc::new(thrussh::server::Config {
methods: thrussh::MethodSet::PUBLICKEY,
keys: vec![ed25519_key],
..thrussh::server::Config::default()
});
let gitlab = Arc::new(Gitlab::new()?);
thrussh::server::run(thrussh_config, "127.0.0.1:2222", Server { gitlab }).await?;
Ok(())
}
struct Server<U: UserProvider + PackageProvider + Send + Sync + 'static> {
gitlab: Arc<U>,
}
impl<U: UserProvider + PackageProvider + Send + Sync + 'static> thrussh::server::Server
for Server<U>
{
type Handler = Handler<U>;
fn new(&mut self, _peer_addr: Option<SocketAddr>) -> Self::Handler {
Handler {
gitlab: self.gitlab.clone(),
user: None,
group: None,
fetcher_future: None,
input_bytes: BytesMut::new(),
output_bytes: BytesMut::new(),
is_git_protocol_v2: false
}
}
}
struct Handler<U: UserProvider + PackageProvider + Send + Sync + 'static> {
gitlab: Arc<U>,
user: Option<User>,
group: Option<String>,
fetcher_future: Option<JoinHandle<anyhow::Result<Vec<Release>>>>,
input_bytes: BytesMut,
output_bytes: BytesMut,
is_git_protocol_v2: bool,
}
impl<U: UserProvider + PackageProvider + Send + Sync + 'static> Handler<U> {
fn user(&self) -> anyhow::Result<&User> {
self.user.as_ref().ok_or(anyhow::anyhow!("no user set"))
}
fn group(&self) -> anyhow::Result<&str> {
self.group.as_deref().ok_or(anyhow::anyhow!("no group set"))
}
fn write(&mut self, packet: PktLine<'_>) -> Result<(), anyhow::Error> {
Encoder.encode(packet, &mut self.output_bytes)
}
fn flush(&mut self, session: &mut Session, channel: ChannelId) {
session.data(
channel,
CryptoVec::from_slice(self.output_bytes.split().as_ref()),
);
}
async fn fetch_releases(&self, group: &str) -> anyhow::Result<Vec<Release>> {
let user = self.user()?;
self.gitlab.clone().fetch_releases_for_group(group, user.clone()).await
}
}
type AsyncHandlerFut<T, U> =
dyn Future<Output = Result<T, <Handler<U> as thrussh::server::Handler>::Error>> + Send;
#[allow(clippy::type_complexity)]
impl<'a, U: UserProvider + PackageProvider + Send + Sync + 'static> thrussh::server::Handler
for Handler<U>
{
type Error = anyhow::Error;
type FutureAuth = Pin<Box<AsyncHandlerFut<(Handler<U>, Auth), U>>>;
type FutureUnit = Pin<Box<AsyncHandlerFut<(Handler<U>, Session), U>>>;
type FutureBool = futures::future::Ready<anyhow::Result<(Self, Session, bool)>>;
fn finished_auth(self, auth: Auth) -> Self::FutureAuth {
Box::pin(futures::future::ready(Ok((self, auth))))
}
fn finished_bool(self, b: bool, session: Session) -> Self::FutureBool {
futures::future::ready(Ok((self, session, b)))
}
fn finished(self, session: Session) -> Self::FutureUnit {
Box::pin(futures::future::ready(Ok((self, session))))
}
fn auth_publickey(mut self, user: &str, public_key: &PublicKey) -> Self::FutureAuth {
let fingerprint = public_key.fingerprint();
let user = user.to_string();
Box::pin(async move {
let mut user = self
.gitlab
.find_user_by_username_password_combo(&user)
.await?;
if user.is_none() {
user = self
.gitlab
.find_user_by_ssh_key(&util::format_fingerprint(&fingerprint)?)
.await?;
}
self.user = Some(user.ok_or(anyhow::anyhow!("failed to find user"))?);
self.finished_auth(Auth::Accept).await
})
}
fn data(mut self, channel: ChannelId, data: &[u8], mut session: Session) -> Self::FutureUnit {
self.input_bytes.extend_from_slice(data);
Box::pin(
async move {
while let Some(frame) = self.codec.decode(&mut self.input_bytes)? {
if frame.command.is_empty() {
session.exit_status_request(channel, 0);
session.eof(channel);
session.close(channel);
return Ok((self, session));
}
let user = self.user()?;
let group = self.group()?;
let mut packfile = GitRepository::default();
}
Ok((self, session))
}
)
}
fn env_request(
mut self,
_channel: ChannelId,
name: &str,
value: &str,
session: Session,
) -> Self::FutureUnit {
#[allow(clippy::single_match)]
match (name, value) {
("GIT_PROTOCOL", "version=2") => self.is_git_protocol_v2 = true,
_ => {}
}
Box::pin(futures::future::ready(Ok((self, session))))
}
fn shell_request(mut self, channel: ChannelId, mut session: Session) -> Self::FutureUnit {
Box::pin(async move {
let username = self.user()?.username.clone();
write!(
&mut self.output_bytes,
"Hi there, {}! You've successfully authenticated, but {} does not provide shell access.\r\n",
username,
env!("CARGO_PKG_NAME")
)?;
self.flush(&mut session, channel);
session.close(channel);
Ok((self, session))
})
}
fn exec_request(
mut self,
channel: ChannelId,
data: &[u8],
mut session: Session,
) -> Self::FutureUnit {
let data = match std::str::from_utf8(data) {
Ok(data) => data,
Err(e) => return Box::pin(futures::future::err(e.into())),
};
let args = shlex::split(data);
Box::pin(async move {
if !self.is_git_protocol_v2 {
anyhow::bail!("not git protocol v2");
}
let mut args = args.into_iter().flat_map(Vec::into_iter);
if args.next().as_deref() != Some("git-upload-pack") {
anyhow::bail!("not git-upload-pack");
}
if let Some(group) = args.next().filter(|v| v.as_str() != "/") {
let group = group
.trim_start_matches('/')
.trim_end_matches('/')
.to_string();
self.group = Some(group);
} else {
session.extended_data(channel, 1, CryptoVec::from_slice(indoc::indoc! {b"
\r\nNo group was given in the path part of the SSH URI. A GitLab group should be defined in your .cargo/config.toml as follows:
[registries]
chartered = {{ index = \"ssh://domain.to.registry.com/my-group\" }}\r\n
"}));
session.close(channel);
}
self.write(PktLine::Data(b"version 2\n"))?;
self.write(PktLine::Data(AGENT.as_bytes()))?;
self.write(PktLine::Data(b"ls-refs=unborn\n"))?;
self.write(PktLine::Data(b"fetch=shallow wait-for-done\n"))?;
self.write(PktLine::Data(b"server-option\n"))?;
self.write(PktLine::Data(b"object-info\n"))?;
self.write(PktLine::Flush)?;
self.flush(&mut session, channel);
Ok((self, session))
})
}
}
@@ -0,0 +1,136 @@
#![allow(clippy::module_name_repetitions)]
use bytes::{Buf, Bytes, BytesMut};
use tokio_util::codec;
use super::packet_line::PktLine;
pub struct Encoder;
impl codec::Encoder<PktLine<'_>> for Encoder {
type Error = anyhow::Error;
fn encode(&mut self, item: PktLine<'_>, dst: &mut BytesMut) -> Result<(), Self::Error> {
item.encode_to(dst)?;
Ok(())
}
}
#[derive(Debug, Default, PartialEq, Eq)]
pub struct GitCommand {
pub command: Bytes,
pub metadata: Vec<Bytes>,
}
#[derive(Default)]
pub struct GitCodec {
command: GitCommand,
}
impl codec::Decoder for GitCodec {
type Item = GitCommand;
type Error = anyhow::Error;
fn decode(&mut self, src: &mut bytes::BytesMut) -> Result<Option<Self::Item>, Self::Error> {
loop {
if src.len() < 4 {
return Ok(None);
}
let mut length_bytes = [0_u8; 4];
length_bytes.copy_from_slice(&src[..4]);
let length = u16::from_str_radix(std::str::from_utf8(&length_bytes)?, 16)? as usize;
if length == 0 {
src.advance(4);
return Ok(Some(std::mem::take(&mut self.command)));
} else if length == 1 || length == 2 {
src.advance(4);
continue;
} else if !(4..=65520).contains(&length) {
return Err(
std::io::Error::new(std::io::ErrorKind::InvalidData, "protocol abuse").into(),
);
}
if src.len() < length {
src.reserve(length - src.len());
return Ok(None);
}
let mut data = src.split_to(length).freeze();
data.advance(4);
if data.ends_with(b"\n") {
data.truncate(data.len() - 1);
}
if self.command.command.is_empty() {
self.command.command = data;
} else {
self.command.metadata.push(data);
}
}
}
}
#[cfg(test)]
mod test {
use bytes::{Bytes, BytesMut};
use std::fmt::Write;
use tokio_util::codec::Decoder;
#[test]
fn decode() {
let mut codec = super::GitCodec::default();
let mut bytes = BytesMut::new();
bytes.write_str("0015agent=git/2.32.0").unwrap();
let res = codec.decode(&mut bytes).unwrap();
assert_eq!(res, None);
bytes.write_char('\n').unwrap();
let res = codec.decode(&mut bytes).unwrap();
assert_eq!(res, None);
bytes.write_str("0000").unwrap();
let res = codec.decode(&mut bytes).unwrap();
assert_eq!(
res,
Some(super::GitCommand {
command: Bytes::from_static(b"agent=git/2.32.0"),
metadata: vec![],
})
);
bytes.write_str("0000").unwrap();
let res = codec.decode(&mut bytes).unwrap();
assert_eq!(
res,
Some(super::GitCommand {
command: Bytes::new(),
metadata: vec![],
})
);
bytes.write_str("0002").unwrap();
bytes.write_str("0005a").unwrap();
bytes.write_str("0001").unwrap();
bytes.write_str("0005b").unwrap();
bytes.write_str("0000").unwrap();
let res = codec.decode(&mut bytes).unwrap();
assert_eq!(
res,
Some(super::GitCommand {
command: Bytes::from_static(b"a"),
metadata: vec![Bytes::from_static(b"b")],
})
);
}
}
@@ -0,0 +1,165 @@
use arrayvec::ArrayVec;
use indexmap::IndexMap;
use super::low_level::{
Commit, CommitUserInfo, HashOutput, PackFileEntry, TreeItem as LowLevelTreeItem, TreeItemKind,
};
#[derive(Default, Debug)]
pub struct GitRepository<'a> {
packfile_entries: IndexMap<HashOutput, PackFileEntry<'a>>,
tree: Tree<'a>,
}
impl<'a> GitRepository<'a> {
pub fn insert<const N: usize>(
&mut self,
path: ArrayVec<&'a str, N>,
file: &'a str,
content: &'a [u8],
) -> Result<(), anyhow::Error> {
let mut directory = &mut self.tree;
for part in path {
let tree_item = directory
.0
.entry(part)
.or_insert_with(|| Box::new(TreeItem::Tree(Tree::default())));
if let TreeItem::Tree(d) = tree_item.as_mut() {
directory = d;
} else {
anyhow::bail!("attempted to use a file as a directory");
}
}
let entry = PackFileEntry::Blob(content);
let file_hash = entry.hash()?;
directory
.0
.insert(file, Box::new(TreeItem::Blob(file_hash)));
self.packfile_entries.insert(file_hash, entry);
Ok(())
}
pub fn commit(
&'a mut self,
name: &'static str,
email: &'static str,
message: &'static str,
) -> Result<(HashOutput, Vec<PackFileEntry<'a>>), anyhow::Error> {
let tree_hash = self.tree.to_packfile_entries(&mut self.packfile_entries)?;
let commit_user = CommitUserInfo {
name,
email,
time: time::OffsetDateTime::now_utc(),
};
let commit = PackFileEntry::Commit(Commit {
tree: tree_hash,
author: commit_user,
committer: commit_user,
message,
});
let commit_hash = commit.hash()?;
self.packfile_entries.insert(commit_hash, commit);
Ok((
commit_hash,
self.packfile_entries.values().cloned().collect(),
))
}
}
#[derive(Default, Debug)]
struct Tree<'a>(IndexMap<&'a str, Box<TreeItem<'a>>>);
impl<'a> Tree<'a> {
fn to_packfile_entries(
&self,
pack_file: &mut IndexMap<HashOutput, PackFileEntry<'a>>,
) -> Result<HashOutput, anyhow::Error> {
let mut tree = Vec::with_capacity(self.0.len());
for (name, item) in &self.0 {
tree.push(match item.as_ref() {
TreeItem::Blob(hash) => LowLevelTreeItem {
kind: TreeItemKind::File,
name,
hash: *hash,
},
TreeItem::Tree(tree) => LowLevelTreeItem {
kind: TreeItemKind::Directory,
name,
hash: tree.to_packfile_entries(pack_file)?,
},
});
}
let tree = PackFileEntry::Tree(tree);
let hash = tree.hash()?;
pack_file.insert(hash, tree);
Ok(hash)
}
}
#[derive(Debug)]
enum TreeItem<'a> {
Blob(HashOutput),
Tree(Tree<'a>),
}
@@ -0,0 +1,323 @@
use bytes::{BufMut, BytesMut};
use flate2::{write::ZlibEncoder, Compression};
use sha1::Digest;
use std::{convert::TryInto, fmt::Write, io::Write as IoWrite};
pub type HashOutput = [u8; 20];
pub struct PackFile<'a> {
entries: Vec<PackFileEntry<'a>>,
}
impl<'a> PackFile<'a> {
#[must_use]
pub fn new(entries: Vec<PackFileEntry<'a>>) -> Self {
Self { entries }
}
#[must_use]
pub const fn header_size() -> usize {
"PACK".len() + std::mem::size_of::<u32>() + std::mem::size_of::<u32>()
}
#[must_use]
pub const fn footer_size() -> usize {
20
}
pub fn encode_to(&self, original_buf: &mut BytesMut) -> Result<(), anyhow::Error> {
let mut buf = original_buf.split_off(original_buf.len());
buf.reserve(Self::header_size() + Self::footer_size());
buf.extend_from_slice(b"PACK"); buf.put_u32(2); buf.put_u32(self.entries.len().try_into()?);
for entry in &self.entries {
entry.encode_to(&mut buf)?;
}
buf.extend_from_slice(&sha1::Sha1::digest(&buf[..]));
original_buf.unsplit(buf);
Ok(())
}
}
#[derive(Debug, Clone, Copy)]
pub struct Commit<'a> {
pub tree: HashOutput,
pub author: CommitUserInfo<'a>,
pub committer: CommitUserInfo<'a>,
pub message: &'a str,
}
impl Commit<'_> {
fn encode_to(&self, out: &mut BytesMut) -> Result<(), anyhow::Error> {
let mut tree_hex = [0_u8; 20 * 2];
hex::encode_to_slice(self.tree, &mut tree_hex)?;
out.write_str("tree ")?;
out.extend_from_slice(&tree_hex);
out.write_char('\n')?;
writeln!(out, "author {}", self.author.encode())?;
writeln!(out, "committer {}", self.committer.encode())?;
write!(out, "\n{}", self.message)?;
Ok(())
}
#[must_use]
pub fn size(&self) -> usize {
let mut len = 0;
len += "tree ".len() + (self.tree.len() * 2) + "\n".len();
len += "author ".len() + self.author.size() + "\n".len();
len += "committer ".len() + self.committer.size() + "\n".len();
len += "\n".len() + self.message.len();
len
}
}
#[derive(Copy, Clone, Debug)]
pub struct CommitUserInfo<'a> {
pub name: &'a str,
pub email: &'a str,
pub time: time::OffsetDateTime,
}
impl CommitUserInfo<'_> {
fn encode(&self) -> String {
format!(
"{} <{}> {} +0000",
self.name,
self.email,
self.time.unix_timestamp()
)
}
#[must_use]
pub fn size(&self) -> usize {
let timestamp_len = itoa::Buffer::new().format(self.time.unix_timestamp()).len();
self.name.len()
+ "< ".len()
+ self.email.len()
+ "> ".len()
+ timestamp_len
+ " +0000".len()
}
}
#[derive(Debug, Copy, Clone)]
pub enum TreeItemKind {
File,
Directory,
}
impl TreeItemKind {
#[must_use]
pub const fn mode(&self) -> &'static str {
match self {
Self::File => "100644",
Self::Directory => "40000",
}
}
}
#[derive(Debug, Copy, Clone)]
pub struct TreeItem<'a> {
pub kind: TreeItemKind,
pub name: &'a str,
pub hash: HashOutput,
}
impl TreeItem<'_> {
fn encode_to(&self, out: &mut BytesMut) -> Result<(), anyhow::Error> {
out.write_str(self.kind.mode())?;
write!(out, " {}\0", self.name)?;
out.extend_from_slice(&self.hash);
Ok(())
}
#[must_use]
pub fn size(&self) -> usize {
self.kind.mode().len() + " ".len() + self.name.len() + "\0".len() + self.hash.len()
}
}
#[derive(Debug, Clone)] pub enum PackFileEntry<'a> {
Commit(Commit<'a>),
Tree(Vec<TreeItem<'a>>),
Blob(&'a [u8]),
}
impl PackFileEntry<'_> {
fn write_header(&self, buf: &mut BytesMut) {
let mut size = self.uncompressed_size();
{
let mut val = 0b1000_0000_u8;
val |= match self {
Self::Commit(_) => 0b001,
Self::Tree(_) => 0b010,
Self::Blob(_) => 0b011,
} << 4;
#[allow(clippy::cast_possible_truncation)] {
val |= (size & 0b1111) as u8;
}
size >>= 4;
buf.put_u8(val);
}
while size != 0 {
#[allow(clippy::cast_possible_truncation)] let mut val = (size & 0b111_1111) as u8;
size >>= 7;
if size != 0 {
val |= 1 << 7;
}
buf.put_u8(val);
}
}
pub fn encode_to(&self, original_out: &mut BytesMut) -> Result<(), anyhow::Error> {
self.write_header(original_out);
let mut out = BytesMut::new();
let size = self.uncompressed_size();
original_out.reserve(size);
out.reserve(size);
match self {
Self::Commit(commit) => {
commit.encode_to(&mut out)?;
}
Self::Tree(items) => {
for item in items {
item.encode_to(&mut out)?;
}
}
Self::Blob(data) => {
out.extend_from_slice(data);
}
}
debug_assert_eq!(out.len(), size);
let mut e = ZlibEncoder::new(Vec::new(), Compression::default());
e.write_all(&out)?;
let compressed_data = e.finish()?;
original_out.extend_from_slice(&compressed_data);
Ok(())
}
#[must_use]
pub fn uncompressed_size(&self) -> usize {
match self {
Self::Commit(commit) => commit.size(),
Self::Tree(items) => items.iter().map(TreeItem::size).sum(),
Self::Blob(data) => data.len(),
}
}
pub fn hash(&self) -> Result<HashOutput, anyhow::Error> {
let size = self.uncompressed_size();
let file_prefix = match self {
Self::Commit(_) => "commit",
Self::Tree(_) => "tree",
Self::Blob(_) => "blob",
};
let size_len = itoa::Buffer::new().format(size).len();
let mut out =
BytesMut::with_capacity(file_prefix.len() + " ".len() + size_len + "\n".len() + size);
write!(out, "{} {}\0", file_prefix, size)?;
match self {
Self::Commit(commit) => {
commit.encode_to(&mut out)?;
}
Self::Tree(items) => {
for item in items {
item.encode_to(&mut out)?;
}
}
Self::Blob(blob) => {
out.extend_from_slice(blob);
}
}
Ok(sha1::Sha1::digest(&out).into())
}
}
@@ -0,0 +1,4 @@
pub mod high_level;
pub mod low_level;
pub mod codec;
pub mod packet_line;
@@ -0,0 +1,71 @@
use bytes::{BufMut, BytesMut};
use std::fmt::Write;
use super::low_level::PackFile;
pub enum PktLine<'a> {
Data(&'a [u8]),
SidebandData(PackFile<'a>),
SidebandMsg(&'a [u8]),
Flush,
Delimiter,
ResponseEnd,
}
impl PktLine<'_> {
pub fn encode_to(&self, buf: &mut BytesMut) -> Result<(), anyhow::Error> {
match self {
Self::Data(data) => {
write!(buf, "{:04x}", data.len() + 4)?;
buf.extend_from_slice(data);
}
Self::SidebandData(packfile) => {
let mut data_buf = buf.split_off(buf.len());
data_buf.put_u8(1); packfile.encode_to(&mut data_buf)?;
write!(buf, "{:04x}", data_buf.len() + 4)?;
buf.unsplit(data_buf);
}
Self::SidebandMsg(msg) => {
write!(buf, "{:04x}", msg.len() + 4 + 1)?;
buf.put_u8(2); buf.extend_from_slice(msg);
}
Self::Flush => buf.extend_from_slice(b"0000"),
Self::Delimiter => buf.extend_from_slice(b"0001"),
Self::ResponseEnd => buf.extend_from_slice(b"0002"),
}
Ok(())
}
}
impl<'a> From<&'a str> for PktLine<'a> {
fn from(val: &'a str) -> Self {
PktLine::Data(val.as_bytes())
}
}
#[cfg(test)]
mod test {
use bytes::BytesMut;
#[test]
fn test_pkt_line() {
let mut buffer = BytesMut::new();
super::PktLine::Data(b"agent=git/2.32.0\n")
.encode_to(&mut buffer)
.unwrap();
assert_eq!(buffer.as_ref(), b"0015agent=git/2.32.0\n");
}
}
@@ -0,0 +1,215 @@
use crate::providers::{Release, User};
use async_trait::async_trait;
use futures::{stream::FuturesUnordered, StreamExt, TryStreamExt};
use percent_encoding::{utf8_percent_encode, NON_ALPHANUMERIC};
use reqwest::header;
use serde::Deserialize;
use std::sync::Arc;
pub struct Gitlab {
client: reqwest::Client,
base_url: String,
}
impl Gitlab {
pub fn new() -> anyhow::Result<Self> {
let mut headers = header::HeaderMap::new();
headers.insert(
"PRIVATE-TOKEN",
header::HeaderValue::from_static("token"),
);
Ok(Self {
client: reqwest::ClientBuilder::new()
.default_headers(headers)
.build()?,
base_url: "https://127.0.0.1/api/v4".to_string(),
})
}
pub async fn get_impersonation_token_for(&self, user: &User) -> anyhow::Result<String> {
let impersonation_token: GitlabImpersonationTokenResponse = self
.client
.get(format!(
"{}/users/{}/impersonation_tokens",
self.base_url, user.id
))
.body(format!("name={};scopes=api", env!("CARGO_PKG_NAME")))
.send()
.await?
.json()
.await?;
Ok(impersonation_token.token)
}
}
#[async_trait]
impl super::UserProvider for Gitlab {
async fn find_user_by_username_password_combo(
&self,
username_password: &str,
) -> anyhow::Result<Option<User>> {
let mut splitter = username_password.splitn(2, ':');
let (username, password) = (splitter.next().unwrap(), splitter.next().unwrap());
if username == "gitlab-ci-token" {
let res: GitlabJobResponse = self
.client
.get(format!("{}/job", self.base_url))
.header("JOB-TOKEN", password)
.send()
.await?
.json()
.await?;
Ok(Some(User {
id: res.user.id,
username: res.user.username,
}))
} else {
Ok(None)
}
}
async fn find_user_by_ssh_key(&self, fingerprint: &str) -> anyhow::Result<Option<User>> {
let res: GitlabSshKeyLookupResponse = self
.client
.get(format!(
"{}/keys?fingerprint={}",
self.base_url, fingerprint
))
.send()
.await?
.json()
.await?;
Ok(res.user.map(|u| User {
id: u.id,
username: u.username,
}))
}
}
#[async_trait]
impl super::PackageProvider for Gitlab {
async fn fetch_releases_for_group(
self: Arc<Self>,
group: &str,
do_as: User,
) -> anyhow::Result<Vec<Release>> {
let impersonation_token = Arc::new(self.get_impersonation_token_for(&do_as).await?);
let mut next_uri = Some(format!(
"{}/groups/{}/packages?per_page=100&pagination=keyset&order_by=id&sort=asc&sudo={}",
self.base_url,
utf8_percent_encode(group, NON_ALPHANUMERIC),
do_as.id
));
let futures = FuturesUnordered::new();
while let Some(uri) = next_uri.take() {
let res = self.client.get(uri).send().await?;
if let Some(link_header) = res.headers().get(reqwest::header::LINK) {
let mut link_header = parse_link_header::parse_with_rel(link_header.to_str()?)?;
if let Some(next) = link_header.remove("next") {
next_uri = Some(next.raw_uri);
}
}
let res: Vec<GitlabPackageResponse> = res.json().await?;
for release in res {
let this = self.clone();
let impersonation_token = impersonation_token.clone();
futures.push(tokio::spawn(async move {
let (project, package) = {
let mut splitter = release.links.web_path.splitn(2, "/-/packages/");
match (splitter.next(), splitter.next()) {
(Some(project), Some(package)) => (&project[1..], package),
_ => return Ok(None),
}
};
let package_files: GitlabPackageFilesResponse = this
.client
.get(format!(
"{}/projects/{}/packages/{}/package_files",
this.base_url,
utf8_percent_encode(project, NON_ALPHANUMERIC),
utf8_percent_encode(package, NON_ALPHANUMERIC),
))
.send()
.await?
.json()
.await?;
Ok::<_, anyhow::Error>(Some(Release {
uri: format!(
"{}/projects/{}/packages/generic/{}/{}/{}?private_token={}",
this.base_url,
utf8_percent_encode(project, NON_ALPHANUMERIC),
utf8_percent_encode(&release.name, NON_ALPHANUMERIC),
utf8_percent_encode(&release.version, NON_ALPHANUMERIC),
package_files.file_name,
impersonation_token,
),
name: release.name,
version: release.version,
checksum: package_files.file_sha256,
}))
}))
}
}
futures
.err_into()
.filter_map(|v| async move { v.and_then(|v| v).transpose() })
.try_collect()
.await
}
}
#[derive(Deserialize)]
pub struct GitlabImpersonationTokenResponse {
pub token: String,
}
#[derive(Deserialize)]
pub struct GitlabPackageFilesResponse {
pub file_name: String,
pub file_sha256: String,
}
#[derive(Deserialize)]
pub struct GitlabPackageResponse {
pub id: u64,
pub name: String,
pub version: String,
#[serde(rename = "_links")]
pub links: GitlabPackageLinksResponse,
}
#[derive(Deserialize)]
pub struct GitlabPackageLinksResponse {
web_path: String,
}
#[derive(Deserialize)]
pub struct GitlabJobResponse {
pub user: GitlabUserResponse,
}
#[derive(Deserialize)]
pub struct GitlabSshKeyLookupResponse {
pub user: Option<GitlabUserResponse>,
}
#[derive(Deserialize)]
pub struct GitlabUserResponse {
pub id: u64,
pub username: String,
}
@@ -0,0 +1,37 @@
pub mod gitlab;
use async_trait::async_trait;
use std::sync::Arc;
#[async_trait]
pub trait UserProvider {
async fn find_user_by_username_password_combo(
&self,
username_password: &str,
) -> anyhow::Result<Option<User>>;
async fn find_user_by_ssh_key(&self, fingerprint: &str) -> anyhow::Result<Option<User>>;
}
#[async_trait]
pub trait PackageProvider {
async fn fetch_releases_for_group(
self: Arc<Self>,
group: &str,
do_as: User,
) -> anyhow::Result<Vec<Release>>;
}
#[derive(Debug, Clone)]
pub struct User {
pub id: u64,
pub username: String,
}
#[derive(Debug)]
pub struct Release {
pub name: String,
pub version: String,
pub checksum: String,
pub uri: String,
}
@@ -0,0 +1,18 @@
pub fn format_fingerprint(fingerprint: &str) -> Result<String, thrussh_keys::Error> {
let raw_hex = hex::encode(
base64::decode(&fingerprint).map_err(|_| thrussh_keys::Error::CouldNotReadKey)?,
);
let mut hex = String::with_capacity(raw_hex.len() + (raw_hex.len() / 2 - 1));
for (i, c) in raw_hex.chars().enumerate() {
if i != 0 && i % 2 == 0 {
hex.push(':');
}
hex.push(c);
}
Ok(hex)
}