--- /dev/null
+use std::io::Write;
+use std::collections::{HashMap, HashSet};
+use std::path::{PathBuf, Path};
+
+use failure::*;
+
+use lazy_static::lazy_static;
+
+use proxmox::tools::{fs::replace_file, fs::CreateOptions};
+
+// define Privilege bitfield
+
+pub const PRIV_SYS_AUDIT: u64 = 1 << 0;
+pub const PRIV_SYS_MODIFY: u64 = 1 << 1;
+pub const PRIV_SYS_POWER_MANAGEMENT: u64 = 1 << 2;
+
+pub const PRIV_STORE_AUDIT: u64 = 1 << 3;
+pub const PRIV_STORE_ALLOCATE: u64 = 1 << 4;
+pub const PRIV_STORE_ALLOCATE_SPACE: u64 = 1 << 5;
+
+pub const ROLE_AUDIT: u64 =
+PRIV_SYS_AUDIT |
+PRIV_STORE_AUDIT;
+
+pub const ROLE_STORE_ADMIN: u64 =
+PRIV_STORE_AUDIT |
+PRIV_STORE_ALLOCATE |
+PRIV_STORE_ALLOCATE_SPACE;
+
+pub const ROLE_STORE_USER: u64 =
+PRIV_STORE_AUDIT |
+PRIV_STORE_ALLOCATE_SPACE;
+
+lazy_static! {
+ static ref ROLE_NAMES: HashMap<&'static str, u64> = {
+ let mut map = HashMap::new();
+
+ map.insert("Admin", std::u64::MAX);
+ map.insert("Audit", ROLE_AUDIT);
+
+
+ map.insert("Store.Admin", ROLE_STORE_ADMIN);
+ map.insert("Store.User", ROLE_STORE_USER);
+
+ map
+ };
+}
+
+fn split_acl_path(path: &str) -> Vec<&str> {
+
+ let items = path.split('/');
+
+ let mut components = vec![];
+
+ for name in items {
+ if name.is_empty() { continue; }
+ components.push(name);
+ }
+
+ components
+}
+
+pub struct AclTree {
+ root: AclTreeNode,
+}
+
+struct AclTreeNode {
+ users: HashMap<String, HashMap<String, bool>>,
+ groups: HashMap<String, HashMap<String, bool>>,
+ children: HashMap<String, AclTreeNode>,
+}
+
+impl AclTreeNode {
+
+ pub fn new() -> Self {
+ Self {
+ users: HashMap::new(),
+ groups: HashMap::new(),
+ children: HashMap::new(),
+ }
+ }
+
+ pub fn insert_group_role(&mut self, group: String, role: String, propagate: bool) {
+ self.groups
+ .entry(group).or_insert_with(|| HashMap::new())
+ .insert(role, propagate);
+ }
+
+ pub fn insert_user_role(&mut self, user: String, role: String, propagate: bool) {
+ self.users
+ .entry(user).or_insert_with(|| HashMap::new())
+ .insert(role, propagate);
+ }
+}
+
+impl AclTree {
+
+ pub fn new() -> Self {
+ Self { root: AclTreeNode::new() }
+ }
+
+ fn get_or_insert_node(&mut self, path: &[&str]) -> &mut AclTreeNode {
+ let mut node = &mut self.root;
+ for comp in path {
+ node = node.children.entry(String::from(*comp))
+ .or_insert_with(|| AclTreeNode::new());
+ }
+ node
+ }
+
+ pub fn insert_group_role(&mut self, path: &str, group: &str, role: &str, propagate: bool) {
+ let path = split_acl_path(path);
+ let node = self.get_or_insert_node(&path);
+ node.insert_group_role(group.to_string(), role.to_string(), propagate);
+ }
+
+ pub fn insert_user_role(&mut self, path: &str, user: &str, role: &str, propagate: bool) {
+ let path = split_acl_path(path);
+ let node = self.get_or_insert_node(&path);
+ node.insert_user_role(user.to_string(), role.to_string(), propagate);
+ }
+
+ fn write_node_config(
+ node: &AclTreeNode,
+ path: &str,
+ w: &mut dyn Write,
+ ) -> Result<(), Error> {
+
+ let mut role_ug_map0 = HashMap::new();
+ let mut role_ug_map1 = HashMap::new();
+
+ for (user, roles) in &node.users {
+ // no need to save, because root is always 'Administrator'
+ if user == "root@pam" { continue; }
+ for (role, propagate) in roles {
+ let role = role.as_str();
+ let user = user.to_string();
+ if *propagate {
+ role_ug_map1.entry(role).or_insert_with(|| HashSet::new())
+ .insert(user);
+ } else {
+ role_ug_map0.entry(role).or_insert_with(|| HashSet::new())
+ .insert(user);
+ }
+ }
+ }
+
+ for (group, roles) in &node.groups {
+ for (role, propagate) in roles {
+ let group = format!("@{}", group);
+ if *propagate {
+ role_ug_map1.entry(role).or_insert_with(|| HashSet::new())
+ .insert(group);
+ } else {
+ role_ug_map0.entry(role).or_insert_with(|| HashSet::new())
+ .insert(group);
+ }
+ }
+ }
+
+ fn group_by_property_list(
+ item_property_map: &HashMap<&str, HashSet<String>>,
+ ) -> HashMap<String, HashSet<String>> {
+ let mut result_map = HashMap::new();
+ for (item, property_map) in item_property_map {
+ let mut item_list = property_map.iter().map(|v| v.as_str())
+ .collect::<Vec<&str>>();
+ item_list.sort();
+ let item_list = item_list.join(",");
+ result_map.entry(item_list).or_insert_with(|| HashSet::new())
+ .insert(item.to_string());
+ }
+ result_map
+ }
+
+ let mut uglist_role_map0 = group_by_property_list(&role_ug_map0)
+ .into_iter()
+ .collect::<Vec<(String, HashSet<String>)>>();
+ uglist_role_map0.sort_unstable_by(|a,b| a.0.cmp(&b.0));
+
+ let mut uglist_role_map1 = group_by_property_list(&role_ug_map1)
+ .into_iter()
+ .collect::<Vec<(String, HashSet<String>)>>();
+ uglist_role_map1.sort_unstable_by(|a,b| a.0.cmp(&b.0));
+
+
+ for (uglist, roles) in uglist_role_map0 {
+ let mut role_list = roles.iter().map(|v| v.as_str())
+ .collect::<Vec<&str>>();
+ role_list.sort();
+ writeln!(w, "acl:0:{}:{}:{}", path, uglist, role_list.join(","))?;
+ }
+
+ for (uglist, roles) in uglist_role_map1 {
+ let mut role_list = roles.iter().map(|v| v.as_str())
+ .collect::<Vec<&str>>();
+ role_list.sort();
+ writeln!(w, "acl:1:{}:{}:{}", path, uglist, role_list.join(","))?;
+ }
+
+ let mut child_names = node.children.keys().map(|v| v.as_str()).collect::<Vec<&str>>();
+ child_names.sort();
+
+ for name in child_names {
+ let child = node.children.get(name).unwrap();
+ let child_path = format!("{}/{}", path, name);
+ Self::write_node_config(child, &child_path, w)?;
+ }
+
+ Ok(())
+ }
+
+ pub fn write_config(&self, w: &mut dyn Write) -> Result<(), Error> {
+ Self::write_node_config(&self.root, "", w)
+ }
+
+ fn parse_acl_line(&mut self, line: &str) -> Result<(), Error> {
+
+ let items: Vec<&str> = line.split(':').collect();
+
+ if items.len() != 5 {
+ bail!("wrong number of items.");
+ }
+
+ if items[0] != "acl" {
+ bail!("line does not start with 'acl'.");
+ }
+
+ let propagate = if items[1] == "0" {
+ false
+ } else if items[1] == "1" {
+ true
+ } else {
+ bail!("expected '0' or '1' for propagate flag.");
+ };
+
+ let path = split_acl_path(items[2]);
+ let node = self.get_or_insert_node(&path);
+
+ let uglist: Vec<&str> = items[3].split(',').map(|v| v.trim()).collect();
+
+ let rolelist: Vec<&str> = items[4].split(',').map(|v| v.trim()).collect();
+
+ for user_or_group in &uglist {
+ for role in &rolelist {
+ if !ROLE_NAMES.contains_key(role) {
+ bail!("unknown role '{}'", role);
+ }
+ if user_or_group.starts_with('@') {
+ let group = &user_or_group[1..];
+ node.insert_group_role(group.to_string(), role.to_string(), propagate);
+ } else {
+ node.insert_user_role(user_or_group.to_string(), role.to_string(), propagate);
+ }
+ }
+ }
+
+ Ok(())
+ }
+
+ pub fn load(filename: &Path) -> Result<(Self, [u8;32]), Error> {
+ let mut tree = Self::new();
+
+ let raw = match std::fs::read_to_string(filename) {
+ Ok(v) => v,
+ Err(err) => {
+ if err.kind() == std::io::ErrorKind::NotFound {
+ String::new()
+ } else {
+ bail!("unable to read acl config {:?} - {}", filename, err);
+ }
+ }
+ };
+
+ let digest = openssl::sha::sha256(raw.as_bytes());
+
+ for (linenr, line) in raw.lines().enumerate() {
+ if let Err(err) = tree.parse_acl_line(line) {
+ bail!("unable to parse acl config {:?}, line {} - {}", filename, linenr, err);
+ }
+ }
+
+ Ok((tree, digest))
+ }
+}
+
+pub const ACL_CFG_FILENAME: &str = "/etc/proxmox-backup/acl.cfg";
+pub const ACL_CFG_LOCKFILE: &str = "/etc/proxmox-backup/.acl.lck";
+
+pub fn config() -> Result<(AclTree, [u8; 32]), Error> {
+ let path = PathBuf::from(ACL_CFG_FILENAME);
+ AclTree::load(&path)
+}
+
+pub fn store_config(acl: &AclTree, filename: &Path) -> Result<(), Error> {
+ let mut raw: Vec<u8> = Vec::new();
+
+ acl.write_config(&mut raw)?;
+
+ let backup_user = crate::backup::backup_user()?;
+ let mode = nix::sys::stat::Mode::from_bits_truncate(0o0640);
+ // set the correct owner/group/permissions while saving file
+ // owner(rw) = root, group(r)= backup
+ let options = CreateOptions::new()
+ .perm(mode)
+ .owner(nix::unistd::ROOT)
+ .group(backup_user.gid);
+
+ replace_file(filename, &raw, options)?;
+
+ Ok(())
+}
projects / proxmox-backup.git / commitdiff