commit 0590fe6a3736c4c8bd379a8228f83732c438d758 Author: Olive Date: Sun Jan 4 04:15:11 2026 -0500 Initial commit diff --git a/Cargo.toml b/Cargo.toml new file mode 100644 index 0000000..e6c4274 --- /dev/null +++ b/Cargo.toml @@ -0,0 +1,17 @@ +[package] +name = "hive" +version = "0.1.0" +edition = "2024" + +[dependencies] +axum = {version = "0.8.3", features = ["multipart"]} +base64 = "0.22.1" +chrono = "0.4.42" +deadpool-diesel = { version = "0.6.1", features = ["sqlite"] } +diesel = { version = "2.2.0", features = ["sqlite", "returning_clauses_for_sqlite_3_35", "chrono"] } +dotenv = "0.15.0" +flate2 = "1.1.5" +tar = "0.4.44" +tempfile = "3.23.0" +tokio = { version = "1.43.0", features = ["full"] } +tower-http = { version = "0.6.7", features = ["fs"] } diff --git a/LICENCE b/LICENCE new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/LICENCE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/diesel.toml b/diesel.toml new file mode 100644 index 0000000..a0d61bf --- /dev/null +++ b/diesel.toml @@ -0,0 +1,9 @@ +# For documentation on how to configure this file, +# see https://diesel.rs/guides/configuring-diesel-cli + +[print_schema] +file = "src/schema.rs" +custom_type_derives = ["diesel::query_builder::QueryId", "Clone"] + +[migrations_directory] +dir = "migrations" diff --git a/migrations/00-base/down.sql b/migrations/00-base/down.sql new file mode 100644 index 0000000..0a0a2b9 --- /dev/null +++ b/migrations/00-base/down.sql @@ -0,0 +1,5 @@ +DROP TABLE users; +DROP TABLE programs; +DROP TABLE enrolments; +DROP TABLE projects; +DROP TABLE submissions; diff --git a/migrations/00-base/up.sql b/migrations/00-base/up.sql new file mode 100644 index 0000000..e08fec8 --- /dev/null +++ b/migrations/00-base/up.sql @@ -0,0 +1,45 @@ +CREATE TABLE users ( + id INTEGER NOT NULL PRIMARY KEY, + name VARCHAR NOT NULL +); + +CREATE TABLE programs ( + id INTEGER NOT NULL PRIMARY KEY, + name VARCHAR NOT NULL +); + +CREATE TABLE enrolments ( + id INTEGER NOT NULL PRIMARY KEY, + user_id INTEGER NOT NULL, + program_id INTEGER NOT NULL, + + FOREIGN KEY (user_id) + REFERENCES users (id), + FOREIGN KEY (program_id) + REFERENCES program (id) +); + +CREATE TABLE projects ( + id INTEGER NOT NULL PRIMARY KEY, + program_id INTEGER NOT NULL, + name VARCHAR NOT NULL, + test BLOB NOT NULL, + grade INTEGER NOT NULL, + + FOREIGN KEY (program_id) + REFERENCES programs (id) +); + +CREATE TABLE submissions ( + id INTEGER NOT NULL PRIMARY KEY, + user_id INTEGER NOT NULL, + project_id INTEGER NOT NULL, + time TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, + results VARCHAR, + grade INTEGER, + + FOREIGN KEY (user_id) + REFERENCES users (id), + FOREIGN KEY (project_id) + REFERENCES projects (id) +); diff --git a/src/auth.rs b/src/auth.rs new file mode 100644 index 0000000..3264a74 --- /dev/null +++ b/src/auth.rs @@ -0,0 +1,41 @@ +/* hive - build and test server + * Copyright (C) 2025 Olive + * see LICENCE file for licensing information */ + +use axum::{ + body::Body, + extract::Request, + http::StatusCode, + middleware::Next, + response::Response, +}; +use base64::{ + engine::general_purpose::URL_SAFE as b64, + Engine as _, +}; + +pub async fn auth_middleware( + mut request: Request, + next: Next, +) -> Response { + if let Some(auth) = request.headers().get("Authorization") { + if let Some((kind, auth)) = String::from_utf8_lossy(auth.as_bytes()).split_once(' ') { + if kind == "Basic" { + if let Ok(auth) = b64.decode(auth) { + if let Some((user, _)) = String::from_utf8_lossy(&auth).split_once(':') { + if let Ok(id) = user.parse::() { + request.extensions_mut().insert(id); + return next.run(request).await; + } + } + } + } + } + } + + Response::builder() + .status(StatusCode::UNAUTHORIZED) + .header("WWW-Authenticate", "Basic realm=\"site\"") + .body(Body::from("")) + .unwrap() +} diff --git a/src/foot.html b/src/foot.html new file mode 100644 index 0000000..9865361 --- /dev/null +++ b/src/foot.html @@ -0,0 +1,3 @@ + + + diff --git a/src/head.html b/src/head.html new file mode 100644 index 0000000..d0c709b --- /dev/null +++ b/src/head.html @@ -0,0 +1,14 @@ + + + + +Hive | {} + + + + + + + + +
diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..1bc290b --- /dev/null +++ b/src/main.rs @@ -0,0 +1,47 @@ +/* hive - build and test server + * Copyright (C) 2025 Olive + * see LICENCE file for licensing information */ + +pub mod auth; +pub mod models; +pub mod routes; +pub mod schema; + +use axum::{ + middleware, + routing::{get, post}, + Router, + serve, + ServiceExt, +}; +use deadpool_diesel::sqlite::{Manager, Pool, Runtime}; +use tower_http::services::ServeFile; + +use crate::auth::*; +use crate::routes::*; + +#[tokio::main] +async fn main() { + dotenv::dotenv(); + + let url = std::env::var("DATABASE_URL") + .expect("DATABASE_URL should be set"); + let manager = Manager::new(url, Runtime::Tokio1); + let pool = Pool::builder(manager).build().unwrap(); + + let app = Router::new() + .route("/", get(get_program)) + .route_service("/style.css", ServeFile::new("/var/www/hive/style.css")) + .route_service("/hexagon.svg", ServeFile::new("/var/www/hive/hexagon.svg")) + .route("/{pr}", get(get_project)) + .route("/{pr}", post(post_project)) + .layer(middleware::from_fn(auth_middleware)) + .with_state(pool); + + let listener = tokio::net::TcpListener::bind("0.0.0.0:5000") + .await + .unwrap(); + serve(listener, app.into_make_service()) + .await + .unwrap(); +} diff --git a/src/models.rs b/src/models.rs new file mode 100644 index 0000000..715808e --- /dev/null +++ b/src/models.rs @@ -0,0 +1,63 @@ +/* hive - build and test server + * Copyright (C) 2025 Olive + * see LICENCE file for licensing information */ + +use diesel::prelude::*; + +#[derive(Identifiable, Queryable, Selectable)] +#[diesel(table_name = crate::schema::users)] +pub struct User { + pub id: i32, + pub name: String, +} + +#[derive(Identifiable, Queryable, Selectable)] +#[diesel(table_name = crate::schema::programs)] +pub struct Program { + pub id: i32, + pub name: String, +} + +#[derive(Identifiable, Queryable, Selectable, Associations)] +#[diesel(belongs_to(Program))] +#[diesel(table_name = crate::schema::enrolments)] +pub struct Enrolment { + pub id: i32, + pub user_id: i32, + pub program_id: i32, +} + +#[derive(QueryableByName)] +pub struct ProjectWithoutTest { + #[diesel(sql_type = diesel::sql_types::Integer)] + pub id: i32, + #[diesel(sql_type = diesel::sql_types::Integer)] + pub program_id: i32, + #[diesel(sql_type = diesel::sql_types::Varchar)] + pub name: String, + #[diesel(sql_type = diesel::sql_types::Integer)] + pub grade: i32, + #[diesel(sql_type = diesel::sql_types::Nullable)] + pub sub_grade: Option, +} + +#[derive(Identifiable, Queryable, Selectable, Insertable, Debug)] +#[diesel(table_name = crate::schema::submissions)] +pub struct Submission { + pub id: i32, + pub user_id: i32, + pub project_id: i32, + pub time: chrono::NaiveDateTime, + pub results: Option, + pub grade: Option, +} + +#[derive(Identifiable, Queryable, Selectable)] +#[diesel(table_name = crate::schema::projects)] +pub struct ProjectWithTest { + pub id: i32, + pub program_id: i32, + pub name: String, + pub test: Vec, + pub grade: i32, +} diff --git a/src/routes.rs b/src/routes.rs new file mode 100644 index 0000000..f1c6cc5 --- /dev/null +++ b/src/routes.rs @@ -0,0 +1,229 @@ +/* hive - build and test server + * Copyright (C) 2025 Olive + * see LICENCE file for licensing information */ + +use std::fmt::Write as FmtWrite; +use std::fs::File; +use std::io::Write as IoWrite; +use std::path::PathBuf; + +use axum::{ + Extension, + extract::{Multipart, Path as AxumPath, State}, + http::StatusCode, + response::{Html, Redirect}, +}; +use deadpool_diesel::sqlite::Pool; +use diesel::{ + insert_into, + prelude::*, + sql_query, +}; +use flate2::read::GzDecoder; +use tar::Archive; +use tempfile::TempDir; +use tokio::process::Command; + +use crate::models::*; +use crate::schema; + +fn e404(err: E) -> (StatusCode, String) +where + E: std::error::Error, +{ + (StatusCode::NOT_FOUND, err.to_string()) +} + +fn e500(err: E) -> (StatusCode, String) +where + E: std::error::Error, +{ + (StatusCode::INTERNAL_SERVER_ERROR, err.to_string()) +} + +pub async fn get_program( + State(pool): State, + Extension(user_id): Extension, +) -> Result, (StatusCode, String)> { + let conn = pool.get().await.map_err(e500)?; + + let programs = conn.interact(move |conn| { + schema::programs::table + .inner_join(schema::enrolments::table.on(schema::enrolments::program_id.eq(schema::programs::id))) + .filter(schema::enrolments::user_id.eq(user_id)) + .select(Program::as_select()) + .load(conn) + }).await.map_err(e500)?.map_err(e500)?; + + // todo sort by then use chunk_by to group with parents to avoid O(n^2) loops + let mut programs_iter = programs.iter(); + let mut list = format!("{}", programs_iter.next().unwrap().id); + for program in programs_iter { + write!(list, ", {}", program.id); + } + let query = format!( + concat!( + "SELECT p.id, p.program_id, p.name, p.grade, s.sub_grade\n", + "FROM projects AS p\n", + "LEFT JOIN (\n", + " SELECT s.project_id, s.user_id, MAX(s.grade) as sub_grade\n", + " FROM submissions AS s\n", + " GROUP BY s.project_id, s.user_id\n", + ") AS s\n", + "ON p.id = s.project_id AND s.user_id = {}\n", + "WHERE p.program_id IN ({})" + ), + user_id, + list + ); + + let projects: Vec = conn.interact(move |conn| { + sql_query(query).get_results(conn) + }).await.map_err(e500)?.map_err(e500)?; + + let mut string = String::new(); + write!(string, include_str!("head.html"), "Programs"); + for program in programs { + write!(string, "
\n"); + write!(string, "{}\n", program.name); + + for project in &projects { + if project.program_id != program.id { + continue + } + + write!(string, "
\n"); + write!(string, "{}\n", project.id, project.name); + write!(string, "\n"); + write!(string, "{}/{}\n", project.sub_grade.unwrap_or(0), project.grade); + write!(string, "
\n"); + } + + write!(string, "
\n"); + } + write!(string, include_str!("foot.html")); + Ok(Html(string)) +} + +pub async fn get_project( + State(pool): State, + Extension(user_id): Extension, + AxumPath(project_id): AxumPath, +) -> Result, (StatusCode, String)> { + let conn = pool.get().await.map_err(e500)?; + + let (project_name, project_grade) = conn.interact(move |conn| { + schema::projects::table + .filter(schema::projects::id.eq(project_id)) + .select(( + schema::projects::name, + schema::projects::grade, + )) + .first::<(String, i32)>(conn) + }).await.map_err(e500)?.map_err(e500)?; + let subs = conn.interact(move |conn| { + schema::submissions::table + .filter(schema::submissions::user_id.eq(user_id)) + .filter(schema::submissions::project_id.eq(project_id)) + .select(Submission::as_select()) + .load(conn) + }).await.map_err(e500)?.map_err(e500)?; + + let mut string = String::new(); + write!(string, include_str!("head.html"), project_name); + write!(string, "
\n"); + write!(string, "Submit\n"); + write!(string, "
\n", project_id); + write!(string, "\n"); + write!(string, "\n"); + write!(string, "
\n"); + write!(string, "
\n"); + + for sub in subs { + write!(string, "
\n"); + if sub.results.is_some() && sub.grade.is_some() { + write!(string, "{}——{}/{}\n", project_name, sub.grade.unwrap(), project_grade); + write!(string, "{}", sub.results.unwrap()); + } else { + write!(string, "{}——0/{}\n", project_name, project_grade); + write!(string, "

Awaiting Testing...

"); + } + write!(string, "
\n"); + } + write!(string, include_str!("foot.html")); + Ok(Html(string)) +} + +pub async fn post_project( + State(pool): State, + Extension(user_id): Extension, + AxumPath(project_id): AxumPath, + mut form: Multipart, +) -> Result { + let conn = pool.get().await.map_err(e500)?; + + let project = conn.interact(move |conn| { + schema::projects::table + .filter(schema::projects::id.eq(project_id)) + .select(ProjectWithTest::as_select()) + .first(conn) + }).await.map_err(e500)?.map_err(e500)?; + + let mut path = TempDir::new().map_err(e500)?.into_path(); + let tar = GzDecoder::new(&*project.test); + let mut archive = Archive::new(tar); + archive.unpack(&path); + + path.push("user"); + let mut file = File::create(&path).map_err(e500)?; + let field = form + .next_field() + .await + .map_err(e500)? + .ok_or((StatusCode::BAD_REQUEST, "no file provided".to_string()))?; + file.write_all(&field.bytes().await.map_err(e500)?).map_err(e500)?; + path.pop(); + + let mut sub = conn.interact(move |conn| { + insert_into(schema::submissions::table) + .values(( + schema::submissions::user_id.eq(user_id), + schema::submissions::project_id.eq(project_id), + )) + .get_result::(conn) + }).await.map_err(e500)?.map_err(e500)?; + + tokio::spawn(async move { + path.push("run.sh"); + let output = Command::new(&path) + .output() + .await; + path.pop(); + std::fs::remove_dir_all(&path); + + sub.results = Some(String::new()); + sub.grade = Some(0); + if let Ok(output) = output { + if let Some((output, grade)) = str::from_utf8(&output.stdout) + .unwrap_or("") + .trim() + .rsplit_once('\n') + { + sub.results = Some(output.to_string()); + sub.grade = Some(grade.parse::().unwrap_or(0)); + } + } + + conn.interact(move |conn| { + diesel::update(schema::submissions::table) + .filter(schema::submissions::id.eq(sub.id)) + .set(( + schema::submissions::results.eq(sub.results), + schema::submissions::grade.eq(sub.grade), + )) + .execute(conn) + }).await; + }); + + Ok(Redirect::to(&format!("/{}", project_id))) +} diff --git a/src/schema.rs b/src/schema.rs new file mode 100644 index 0000000..7e4dca1 --- /dev/null +++ b/src/schema.rs @@ -0,0 +1,51 @@ +// @generated automatically by Diesel CLI. + +diesel::table! { + enrolments (id) { + id -> Integer, + user_id -> Integer, + program_id -> Integer, + } +} + +diesel::table! { + programs (id) { + id -> Integer, + name -> Text, + } +} + +diesel::table! { + projects (id) { + id -> Integer, + program_id -> Integer, + name -> Text, + test -> Binary, + grade -> Integer, + } +} + +diesel::table! { + submissions (id) { + id -> Integer, + user_id -> Integer, + project_id -> Integer, + time -> Timestamp, + results -> Nullable, + grade -> Nullable, + } +} + +diesel::table! { + users (id) { + id -> Integer, + name -> Text, + } +} + +diesel::joinable!(enrolments -> users (user_id)); +diesel::joinable!(projects -> programs (program_id)); +diesel::joinable!(submissions -> projects (project_id)); +diesel::joinable!(submissions -> users (user_id)); + +diesel::allow_tables_to_appear_in_same_query!(enrolments, programs, projects, submissions, users,); diff --git a/static/hexagon.svg b/static/hexagon.svg new file mode 100644 index 0000000..d4b017e --- /dev/null +++ b/static/hexagon.svg @@ -0,0 +1,4 @@ + + + + diff --git a/static/style.css b/static/style.css new file mode 100644 index 0000000..0face54 --- /dev/null +++ b/static/style.css @@ -0,0 +1,56 @@ +:root { + --font: #ffffff; + --dark: #1A190F; +} + +html { + color: var(--font); + font-family: "Hack", "Hack Nerd Font", "JetBrains Mono", "JetBrainsMono Nerd Font", monospace, sans-serif; + + background: var(--dark) url('data:image/svg+xml;utf8,'); + background-position: 1.25em 0.75em; +} + +html, body { + margin: 0; + padding: 0; + overflow-x: hidden; +} + +main { + max-width: 800px; + margin: 1em auto; +} + +fieldset { + border-color: var(--font); + border-radius: 4px; + background-color: var(--dark); + border-width: 2px; + + margin: 0 1em 1em 1em; +} + +legend { + margin-left: 1em; +} + +a { + color: #AF8CCF; + text-decoration: none; +} + +div { + display: flex; + & > span:nth-child(2) { + flex-grow: 1; + border-bottom: dotted 3px var(--font); + margin: 0 0.75em; + translate: 0 -0.5em; + } + + & > p { + margin: 0; + padding: 0; + } +} diff --git a/util/Makefile b/util/Makefile new file mode 100644 index 0000000..e14abaf --- /dev/null +++ b/util/Makefile @@ -0,0 +1,43 @@ +# shackle - seccomp jail +# Copyright (C) 2025 Olive +# see LICENCE file for licensing information + +.POSIX: + +VERSION = 1.0.0 + +PREFIX = /usr/local + +WPROFILE = -Wall -Wextra -Wstrict-prototypes -Wmissing-declarations -Wshadow \ +-Wswitch-default -Wunreachable-code -Wcast-align -Wpointer-arith -Wcast-qual \ +-Wbad-function-cast -Winline -Wundef -Wnested-externs -Wwrite-strings \ +-Wno-unused-parameter -Wfloat-equal -Wpedantic +STD = -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=500 + +CFLAGS = $(WPROFILE) $(STD) -Os +LDFLAGS = -lseccomp + +SRC = shackle.c +OBJ = $(SRC:.c=.o) + +all: shackle + +.c.o: + $(CC) $(CFLAGS) -c $< + +shackle: $(OBJ) + $(CC) $(OBJ) -o $@ $(LDFLAGS) + +clean: + rm -f shackle $(OBJ) + +install: all + mkdir -p $(PREFIX)/bin + cp -f shackle $(PREFIX)/bin + chown root:users $(PREFIX)/bin/shackle + chmod 4754 $(PREFIX)/bin/shackle + +uninstall: + rm -f $(PREFIX)/bin/shackle + +.PHONY: all clean install uninstall diff --git a/util/shackle.c b/util/shackle.c new file mode 100644 index 0000000..b48b5ca --- /dev/null +++ b/util/shackle.c @@ -0,0 +1,227 @@ +/* shackle - seccomp jail + * Copyright (C) 2025 Olive + * see LICENCE file for licensing information */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static void +die(const char *fmt, ...) +{ + va_list ap; + va_start(ap, fmt); + vfprintf(stderr, fmt, ap); + va_end(ap); + + if (fmt[strlen(fmt) - 1] != '\n') + perror(NULL); + exit(127); +} + +static int +tempcb(const char *path, const struct stat *sb, int typeflag, + struct FTW *ftwbuf) +{ + return remove(path); +} + +static int +proccb(const char *path, const struct stat *sb, int typeflag, + struct FTW *ftwbuf) +{ + if (typeflag != FTW_F) + return 0; + + int fd; + sscanf(path, "/proc/self/fd/%d", &fd); + return fd < 3 ? 0 : close(fd); +} + +int +main(int argc, char **argv) +{ + if (argc < 2) + die("usage: shackle [program] [args...]"); + + /* get passwd file entry to later drop privileges */ + struct passwd *pw; + if ((pw = getpwnam("hive")) == NULL) + die("shackle: unable to get password file entry: "); + + /* create temporary folder to house program and later chroot to */ + char folder[] = "/tmp/hive.XXXXXX"; + if (mkdtemp(folder) == NULL) + die("shackle: unable to make temporary directory: "); + + /* copy program to temporary folder */ + char file[] = "/tmp/hive.XXXXXX/program"; + memcpy(file, folder, sizeof(folder) - 1); + + int from, to; + if ((from = open(argv[1], O_RDONLY)) == -1) + die("shackle: unable to open file: "); + if ((to = creat(file, 0555)) == -1) + die("shackle: unable to create file: "); + + ssize_t nread; + char buf[4096]; + while ((nread = read(from, buf, sizeof(buf))) > 0) { + do { + ssize_t nwrite; + if ((nwrite = write(to, buf + sizeof(buf) - nread, nread)) >= 0) + nread -= nwrite; + else if (errno != EINTR) + die("shackle: unable to write to file: "); + } while (nread > 0); + } + if (nread != 0) + die("shackle: unable to read file: "); + if (close(to)) + die("shackle: unable to close file: "); + if (close(from)) + die("shackle: unable to close file: "); + + /* change file permissions on folder and file */ + if (chown(folder, pw->pw_uid, pw->pw_gid)) + die("shackle: unable to change folder ownership: "); + if (chmod(folder, 0777)) + die("shackle: unable to change folder permissions: "); + if (chown(file, pw->pw_uid, pw->pw_gid)) + die("shackle: unable to change file ownership: "); + if (chmod(file, 0777)) + die("shackle: unable to change file permissions: "); + + /* close all open file descriptors except stdin, stdout, and stderr */ + if (nftw("/proc/self/fd", proccb, FOPEN_MAX, 0)) + die("shackle: unable to close open file descriptors: "); + + /* prepare to set timer */ + sigset_t set; + sigemptyset(&set); + sigaddset(&set, SIGCHLD); + sigprocmask(SIG_BLOCK, &set, NULL); + + /* fork and wait child */ + pid_t child; + if ((child = fork()) != 0) { + if (child == -1) + die("shackle: failed to fork process: "); + + /* drop root privileges */ + if (initgroups("hive", pw->pw_gid)) + die("shackle: unable to init groups: "); + if (setgid(pw->pw_gid)) + die("shackle: unable to set group id: "); + if (setuid(pw->pw_uid)) + die("shackle: unable to set user id: "); + + /* kill the child process after a timeout */ + char *tenv = getenv("SHACKLE_TIMEOUT"); + int timeout = tenv == NULL ? 1 : strtoul(tenv, NULL, 10); + if (sigtimedwait(&set, NULL, &(struct timespec) + { .tv_sec = timeout == 0 ? 1 : timeout }) == -1) + kill(child, SIGKILL); + siginfo_t info; + if (waitid(P_PID, child, &info, WEXITED) == -1) + die("shackle: unable to wait child process: "); + + /* remove temporary folder and contents */ + if (nftw(folder, tempcb, FOPEN_MAX, FTW_DEPTH | FTW_MOUNT | FTW_PHYS)) + die("shackle: unable to remove temporary folder and contents: "); + + return info.si_status; + } + + /* enter chroot jail */ + if (chroot(folder)) + die("shackle: unable to chroot: "); + if (chdir("/")) + die("shackle: unable to chdir into chroot directory: "); + + /* drop root privileges */ + if (initgroups("hive", pw->pw_gid)) + die("shackle: unable to init groups: "); + if (setgid(pw->pw_gid)) + die("shackle: unable to set group id: "); + if (setuid(pw->pw_uid)) + die("shackle: unable to set user id: "); + + /* restrict available memory and number of child processes */ + struct rlimit mem = { .rlim_cur = 1024 * 1024 * 64, + .rlim_max = 1024 * 1024 * 64 }; + if (setrlimit(RLIMIT_AS, &mem)) + die("shackle: unable to restrict memory rlimit: "); + struct rlimit proc = { .rlim_cur = 0, .rlim_max = 0 }; + if (setrlimit(RLIMIT_NPROC, &proc)) + die("shackle: unable to restrict child processes rlimit: "); + + /* create seccomp filter and only allow read, write, exit, sigreturn, + * execve, and brk syscalls, as well as others needed for program + * instantiation */ + if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) == -1) + die("shackle: unable to set no new privileges flag: "); + + scmp_filter_ctx ctx; + if ((ctx = seccomp_init(SCMP_ACT_KILL)) == NULL) + die("shackle: unable to init seccomp filter"); + + if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(read), 0)) + die("shackle: unable to add seccomp rule"); + if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(write), 0)) + die("shackle: unable to add seccomp rule"); + if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(exit_group), 0)) + die("shackle: unable to add seccomp rule"); + if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(sigreturn), 0)) + die("shackle: unable to add seccomp rule"); + if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(brk), 0)) + die("shackle: unable to add seccomp rule"); + if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(execve), 0)) + die("shackle: unable to add seccomp rule"); + + if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(mprotect), 0)) + die("shackle: unable to add seccomp rule"); + if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(futex), 0)) + die("shackle: unable to add seccomp rule"); + if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(mmap), 0)) + die("shackle: unable to add seccomp rule"); + if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(lseek), 0)) + die("shackle: unable to add seccomp rule"); + if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(fstat), 0)) + die("shackle: unable to add seccomp rule"); + if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(readlinkat), 0)) + die("shackle: unable to add seccomp rule"); + if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(getrandom), 0)) + die("shackle: unable to add seccomp rule"); + if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(prlimit64), 0)) + die("shackle: unable to add seccomp rule"); + if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(rseq), 0)) + die("shackle: unable to add seccomp rule"); + if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(set_robust_list), 0)) + die("shackle: unable to add seccomp rule"); + if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(set_tid_address), 0)) + die("shackle: unable to add seccomp rule"); + if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(arch_prctl), 0)) + die("shackle: unable to add seccomp rule"); + + if (seccomp_load(ctx)) + die("shackle: unable to load seccomp filter"); + + char name[] = "program"; + argv[1] = name; + execve(argv[1], argv, &(char *const){ NULL }); + die("shackle: unable to run program: "); +}