src/config/token_shadow.rs

   1 use std::collections::HashMap;
   2
   3 use anyhow::{bail, format_err, Error};
   4 use serde::{Serialize, Deserialize};
   5 use serde_json::{from_value, Value};
   6
   7 use proxmox::tools::fs::CreateOptions;
   8
   9 use crate::api2::types::Authid;
  10 use crate::auth;
  11 use pbs_config::open_backup_lockfile;
  12
  13 const LOCK_FILE: &str = pbs_buildcfg::configdir!("/token.shadow.lock");
  14 const CONF_FILE: &str = pbs_buildcfg::configdir!("/token.shadow");
  15
  16 #[derive(Serialize, Deserialize)]
  17 #[serde(rename_all="kebab-case")]
  18 /// ApiToken id / secret pair
  19 pub struct ApiTokenSecret {
  20     pub tokenid: Authid,
  21     pub secret: String,
  22 }
  23
  24 fn read_file() -> Result<HashMap<Authid, String>, Error> {
  25     let json = proxmox::tools::fs::file_get_json(CONF_FILE, Some(Value::Null))?;
  26
  27     if json == Value::Null {
  28         Ok(HashMap::new())
  29     } else {
  30         // swallow serde error which might contain sensitive data
  31         from_value(json).map_err(|_err| format_err!("unable to parse '{}'", CONF_FILE))
  32     }
  33 }
  34
  35 fn write_file(data: HashMap<Authid, String>) -> Result<(), Error> {
  36     let backup_user = pbs_config::backup_user()?;
  37     let options = CreateOptions::new()
  38         .perm(nix::sys::stat::Mode::from_bits_truncate(0o0640))
  39         .owner(backup_user.uid)
  40         .group(backup_user.gid);
  41
  42     let json = serde_json::to_vec(&data)?;
  43     proxmox::tools::fs::replace_file(CONF_FILE, &json, options)
  44 }
  45
  46 /// Verifies that an entry for given tokenid / API token secret exists
  47 pub fn verify_secret(tokenid: &Authid, secret: &str) -> Result<(), Error> {
  48     if !tokenid.is_token() {
  49         bail!("not an API token ID");
  50     }
  51
  52     let data = read_file()?;
  53     match data.get(tokenid) {
  54         Some(hashed_secret) => {
  55             auth::verify_crypt_pw(secret, &hashed_secret)
  56         },
  57         None => bail!("invalid API token"),
  58     }
  59 }
  60
  61 /// Adds a new entry for the given tokenid / API token secret. The secret is stored as salted hash.
  62 pub fn set_secret(tokenid: &Authid, secret: &str) -> Result<(), Error> {
  63     if !tokenid.is_token() {
  64         bail!("not an API token ID");
  65     }
  66
  67     let _guard = open_backup_lockfile(LOCK_FILE, None, true)?;
  68
  69     let mut data = read_file()?;
  70     let hashed_secret = auth::encrypt_pw(secret)?;
  71     data.insert(tokenid.clone(), hashed_secret);
  72     write_file(data)?;
  73
  74     Ok(())
  75 }
  76
  77 /// Deletes the entry for the given tokenid.
  78 pub fn delete_secret(tokenid: &Authid) -> Result<(), Error> {
  79     if !tokenid.is_token() {
  80         bail!("not an API token ID");
  81     }
  82
  83     let _guard = open_backup_lockfile(LOCK_FILE, None, true)?;
  84
  85     let mut data = read_file()?;
  86     data.remove(tokenid);
  87     write_file(data)?;
  88
  89     Ok(())
  90 }