🏡 index : ~doyle/chartered.git

author Jordan Doyle <jordan@doyle.la> 2021-08-28 0:42:33.0 +01:00:00
committer Jordan Doyle <jordan@doyle.la> 2021-08-28 0:46:43.0 +01:00:00
commit
d7eb7d3a1a52d7fdcbb5d23f68352dbe94786ae7 [patch]
tree
eeaa6b19b3d76bf58efa606ab607789dc94696df
download
d7eb7d3a1a52d7fdcbb5d23f68352dbe94786ae7.tar.gz

Initial commit



Diff

 .gitignore     |    2 ++
 Cargo.lock     | 1363 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml     |   19 +++++++++++++++++++
 README.md      |   19 +++++++++++++++++++
 src/main.rs    |  195 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/git/mod.rs |   36 ++++++++++++++++++++++++++++++++++++
 6 files changed, 1634 insertions(+)

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c403c34 100644
--- /dev/null
+++ a/.gitignore
@@ -1,0 +1,2 @@
/target
.idea/
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..c3ec7e1 100644
--- /dev/null
+++ a/Cargo.lock
@@ -1,0 +1,1363 @@
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name = "winapi-i686-pc-windows-gnu"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"

[[package]]
name = "winapi-util"
version = "0.1.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
dependencies = [
 "winapi",
]

[[package]]
name = "winapi-x86_64-pc-windows-gnu"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

[[package]]
name = "yasna"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e262a29d0e61ccf2b6190d7050d4b237535fc76ce4c1210d9caa316f71dffa75"
dependencies = [
 "bit-vec",
 "num-bigint",
]

[[package]]
name = "zeroize"
version = "1.3.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4756f7db3f7b5574938c3eb1c117038b8e07f95ee6718c0efad4ac21508f1efd"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..ebde3e0 100644
--- /dev/null
+++ a/Cargo.toml
@@ -1,0 +1,19 @@
[package]
name = "chartered"
version = "0.1.0"
edition = "2018"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
axum = "0.2"
tokio = { version = "1", features = ["full"] }
tower = { version = "0.4", features = ["util", "filter"] }
tower-http = { version = "0.1", features = ["trace"] }

async-trait = "0"
thrussh = "0.33"
futures = "0.3"
thrussh-keys = "0.21"
anyhow = "1"
env_logger = "0.9"
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..ca8716c 100644
--- /dev/null
+++ a/README.md
@@ -1,0 +1,19 @@
# chartered

a little dig at creating a private cargo repository with authenticated downloads, the plan is to have git connect to
a git server we setup that we can serve a fake index from generated just for the authenticated user that we can embed
authentication credentials into.

i've got git connecting to this server and attempting to communicate with it after sending a little bit of hard-coded
preamble.

next steps:

- reverse engineer & create tokio codec for the git protocol
- serve an index
- serve cargo manifest over git (how does git handle 'force pushes' from server -> client? lets see how they like it for once, i'm sick of people picking on servers all the time)
- serve .crate files over http using auth tokens we generated while serving the manifest

#### open q's

maybe it'd be better to use git directly and create an index on the filesystem just for the user? seems less fun though
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..7782588 100644
--- /dev/null
+++ a/src/main.rs
@@ -1,0 +1,195 @@
pub mod git;

use crate::git::PktLine;


use std::sync::{Arc};
use thrussh::server::{Auth, Session};
use thrussh::*;
use thrussh_keys::*;

#[tokio::main]
async fn main() {
    env_logger::init();

    let mut config = thrussh::server::Config::default();
    config
        .keys
        .push(thrussh_keys::key::KeyPair::generate_ed25519().unwrap());
    let config = Arc::new(config);
    thrussh::server::run(config, "127.0.0.1:2233", Server)
        .await
        .unwrap();
}

#[derive(Clone)]
struct Server;

impl server::Server for Server {
    type Handler = Self;
    fn new(&mut self, _: Option<std::net::SocketAddr>) -> Self {
        self.clone()
    }
}

impl server::Handler for Server {
    type Error = anyhow::Error;
    type FutureAuth = futures::future::Ready<Result<(Self, server::Auth), anyhow::Error>>;
    type FutureUnit = futures::future::Ready<Result<(Self, Session), anyhow::Error>>;
    type FutureBool = futures::future::Ready<Result<(Self, Session, bool), anyhow::Error>>;

    fn finished_auth(self, auth: Auth) -> Self::FutureAuth {
        eprintln!("finished auth");
        futures::future::ready(Ok((self, auth)))
    }

    fn finished_bool(self, b: bool, s: Session) -> Self::FutureBool {
        eprintln!("finished bool");
        futures::future::ready(Ok((self, s, b)))
    }

    fn finished(self, s: Session) -> Self::FutureUnit {
        eprintln!("finished");
        futures::future::ready(Ok((self, s)))
    }

    fn shell_request(self, channel: ChannelId, mut session: Session) -> Self::FutureUnit {
        session.data(channel, CryptoVec::from_slice(b"Hi there! You've successfully authenticated, but chartered does not provide shell access.\r\n"));
        session.close(channel);
        futures::future::ready(Ok((self, session)))
    }

    fn exec_request(
        self,
        channel: ChannelId,
        data: &[u8],
        mut session: Session,
    ) -> Self::FutureUnit {
        eprintln!("exec {:x?}", data);

        if !data.starts_with(b"git-upload-pack ") {
            session.data(
                channel,
                CryptoVec::from_slice(b"Sorry, I have no clue who you are\r\n"),
            );
            session.close(channel);
        } else {
            // TODO: check GIT_PROTOCOL=version=2 set
            session.data(channel, PktLine(b"version 2\n").into());
            session.data(channel, PktLine(b"agent=chartered/0.1.0\n").into());
            session.data(channel, PktLine(b"ls-refs=unborn\n").into());
            session.data(channel, PktLine(b"fetch=shallow wait-for-done\n").into());
            session.data(channel, PktLine(b"server-option\n").into());
            session.data(channel, PktLine(b"object-info\n").into());
            session.data(channel, CryptoVec::from_slice(git::END_OF_MESSAGE));
        }

        futures::future::ready(Ok((self, session)))
    }

    fn subsystem_request(
        self,
        _channel: ChannelId,
        data: &str,
        session: Session,
    ) -> Self::FutureUnit {
        eprintln!("subsystem req: {}", data);
        futures::future::ready(Ok((self, session)))
    }

    fn auth_publickey(self, _: &str, _: &key::PublicKey) -> Self::FutureAuth {
        eprintln!("finished auth pubkey");
        self.finished_auth(server::Auth::Accept)
    }

    fn data(self, _channel: ChannelId, data: &[u8], session: Session) -> Self::FutureUnit {
        eprintln!("got data: {:x?}", data);
        futures::future::ready(Ok((self, session)))
    }

    fn extended_data(
        self,
        _channel: ChannelId,
        code: u32,
        data: &[u8],
        session: Session,
    ) -> Self::FutureUnit {
        eprintln!("got extended data: {:x?} ({})", data, code);
        futures::future::ready(Ok((self, session)))
    }

    fn signal(self, _channel: ChannelId, signal_name: Sig, session: Session) -> Self::FutureUnit {
        eprintln!("signal: {:#?}", signal_name);
        futures::future::ready(Ok((self, session)))
    }

    fn window_change_request(
        self,
        _channel: ChannelId,
        _col_width: u32,
        _row_height: u32,
        _pix_width: u32,
        _pix_height: u32,
        session: Session,
    ) -> Self::FutureUnit {
        eprintln!("window change req");
        futures::future::ready(Ok((self, session)))
    }

    fn env_request(
        self,
        _channel: ChannelId,
        variable_name: &str,
        variable_value: &str,
        session: Session,
    ) -> Self::FutureUnit {
        eprintln!("set env {} = {}", variable_name, variable_value);
        futures::future::ready(Ok((self, session)))
    }

    fn x11_request(
        self,
        _channel: ChannelId,
        _single_connection: bool,
        _x11_auth_protocol: &str,
        _x11_auth_cookie: &str,
        _x11_screen_number: u32,
        session: Session,
    ) -> Self::FutureUnit {
        eprintln!("x11 req");
        futures::future::ready(Ok((self, session)))
    }

    fn pty_request(
        self,
        _channel: ChannelId,
        _term: &str,
        _col_width: u32,
        _row_height: u32,
        _pix_width: u32,
        _pix_height: u32,
        _modes: &[(Pty, u32)],
        session: Session,
    ) -> Self::FutureUnit {
        eprintln!("pty req");
        futures::future::ready(Ok((self, session)))
    }

    fn channel_open_direct_tcpip(
        self,
        _channel: ChannelId,
        _host_to_connect: &str,
        _port_to_connect: u32,
        _originator_address: &str,
        _originator_port: u32,
        session: Session,
    ) -> Self::FutureUnit {
        eprintln!("direct tcpip");
        futures::future::ready(Ok((self, session)))
    }

    fn channel_eof(self, _channel: ChannelId, session: Session) -> Self::FutureUnit {
        eprintln!("eof");
        futures::future::ready(Ok((self, session)))
    }
}
diff --git a/src/git/mod.rs b/src/git/mod.rs
new file mode 100644
index 0000000..f464cbf 100644
--- /dev/null
+++ a/src/git/mod.rs
@@ -1,0 +1,36 @@
use thrussh::CryptoVec;

pub const END_OF_MESSAGE: &'static [u8] = b"0000";

pub struct PktLine<'a>(pub &'a [u8]);

impl PktLine<'_> {
    // todo: encode to connection's `bytes::BytesMut`
    pub fn encode(&self) -> Vec<u8> {
        let mut v = Vec::new();
        v.extend_from_slice(format!("{:04x}", self.0.len() + 4).as_ref());
        v.extend_from_slice(self.0);
        v
    }
}

impl From<PktLine<'_>> for CryptoVec {
    fn from(val: PktLine<'_>) -> Self {
        Self::from(val.encode())
    }
}

impl<'a> From<&'a str> for PktLine<'a> {
    fn from(val: &'a str) -> Self {
        PktLine(val.as_bytes())
    }
}

#[cfg(test)]
mod test {
    #[test]
    fn test_pkt_line() {
        let encoded = super::PktLine(b"agent=git/2.32.0\n").encode();
        assert_eq!(encoded, b"0015agent=git/2.32.0\n");
    }
}