Decoupled app into main and lib
German Lashevich
7 years ago
parent
7a56afbaec
commit
593530834b
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extern crate base32;
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extern crate oath;
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extern crate rand;
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extern crate serde_json;
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#[macro_use]
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extern crate serde_derive;
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use std::collections::HashMap;
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use std::fs::{create_dir_all, File, OpenOptions};
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use std::io::ErrorKind;
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use std::path::{Path, PathBuf};
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const DATABASE_VERSION: u8 = 1;
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pub struct RusTOTPony<DB: Database> {
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database: DB,
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applications: HashMap<String, GenApp>,
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}
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impl<DB: Database> RusTOTPony<DB> {
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pub fn new(db: DB) -> RusTOTPony<DB> {
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RusTOTPony {
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applications: db.get_applications(),
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database: db,
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}
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}
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pub fn create_application(
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&mut self,
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name: &str,
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username: &str,
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secret: &str,
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) -> Result<(), String> {
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if let Some(secret_bytes) = GenApp::base32_to_bytes(secret) {
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let new_app = GenApp::new(name, username, secret, secret_bytes);
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if self.applications.contains_key(name) {
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Err(format!("Application with name '{}' already exists!", name))
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} else {
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&self.applications.insert(String::from(name), new_app);
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Ok(())
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}
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} else {
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return Err(String::from("Couldn't decode secret key"));
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}
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}
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pub fn delete_application(&mut self, name: &str) -> Result<(), String> {
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if let Some(_) = self.applications.remove(name) {
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Ok(())
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} else {
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Err(format!(
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"Application with the name '{}' doesn't exist",
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name
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))
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}
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}
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pub fn rename_application(&mut self, name: &str, newname: &str) -> Result<(), String> {
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if let Some(app) = self.applications.get_mut(name) {
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app.name = String::from(newname);
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Ok(())
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} else {
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Err(format!("Application '{}' wasn't found", name))
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}
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}
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pub fn get_applications(&self) -> Result<&HashMap<String, GenApp>, String> {
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if self.applications.len() == 0 {
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Err(String::from("There are no applications"))
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} else {
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Ok(&self.applications)
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}
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}
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pub fn get_application(&self, name: &str) -> Result<&GenApp, String> {
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if let Some(app) = self.applications.get(name) {
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Ok(app)
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} else {
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Err(format!("Application '{}' wasn't found", name))
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}
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}
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pub fn delete_all_applications(&mut self) {
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self.applications = HashMap::new();
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}
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pub fn flush(&self) {
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&self.database.save_applications(&self.applications);
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}
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}
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pub trait Database {
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fn get_applications(&self) -> HashMap<String, GenApp>;
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fn save_applications(&self, applications: &HashMap<String, GenApp>);
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}
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impl Database for JsonDatabase {
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fn get_applications(&self) -> HashMap<String, GenApp> {
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let db_content = self.read_database_file();
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db_content.content.applications
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}
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fn save_applications(&self, applications: &HashMap<String, GenApp>) {
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let mut db_content = Self::get_empty_schema();
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db_content.content.applications = applications.clone();
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self.save_database_file(db_content);
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}
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}
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#[derive(Serialize, Deserialize)]
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struct JsonDatabaseSchema {
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version: u8,
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content: DatabaseContentSchema,
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}
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#[derive(Serialize, Deserialize)]
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struct DatabaseContentSchema {
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applications: HashMap<String, GenApp>,
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}
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pub struct JsonDatabase {
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file_path: PathBuf,
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}
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impl JsonDatabase {
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pub fn new(path: PathBuf) -> JsonDatabase {
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JsonDatabase { file_path: path }
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}
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fn read_database_file(&self) -> JsonDatabaseSchema {
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let file = match File::open(&self.file_path) {
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Ok(f) => f,
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Err(ref err) if err.kind() == ErrorKind::NotFound => return Self::get_empty_schema(),
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Err(err) => panic!("There was a problem opening file: {:?}", err),
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};
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serde_json::from_reader(file).expect("Couldn't parse JSON from database file")
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}
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fn save_database_file(&self, content: JsonDatabaseSchema) {
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let file = match self.open_database_file_for_write() {
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Ok(f) => f,
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Err(ref err) if err.kind() == ErrorKind::NotFound => self.create_database_file()
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.expect("Couldn't create database file"),
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Err(err) => panic!("Couldn't open database file: {:?}", err),
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};
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serde_json::to_writer(file, &content).expect("Couldn't write JSON data to database file");
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}
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fn create_database_file(&self) -> Result<File, std::io::Error> {
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let dir = std::env::home_dir().unwrap_or(PathBuf::from("."));
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if let Some(parent_dir) = Path::new(&self.file_path).parent() {
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let dir = dir.join(parent_dir);
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create_dir_all(dir)?;
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}
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self.open_database_file_for_write()
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}
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fn open_database_file_for_write(&self) -> Result<File, std::io::Error> {
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OpenOptions::new()
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.write(true)
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.truncate(true)
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.create(true)
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.open(&self.file_path)
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}
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fn get_empty_schema() -> JsonDatabaseSchema {
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JsonDatabaseSchema {
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version: DATABASE_VERSION,
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content: DatabaseContentSchema {
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applications: HashMap::new(),
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},
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}
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}
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}
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#[derive(Serialize, Deserialize, Debug, Clone)]
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pub struct GenApp {
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name: String,
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secret: String,
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username: String,
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secret_bytes: Vec<u8>,
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}
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impl GenApp {
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fn new(name: &str, username: &str, secret: &str, secret_bytes: Vec<u8>) -> Self {
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GenApp {
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name: String::from(name),
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secret: String::from(secret),
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username: String::from(username),
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secret_bytes: secret_bytes,
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}
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}
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pub fn get_name(&self) -> &str {
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self.name.as_str()
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}
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pub fn get_secret(&self) -> &str {
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self.secret.as_str()
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}
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pub fn get_username(&self) -> &str {
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self.username.as_str()
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}
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pub fn get_code(&self) -> u64 {
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Self::totp(&self.secret_bytes)
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}
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fn base32_to_bytes(secret: &str) -> Option<Vec<u8>> {
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base32::decode(base32::Alphabet::RFC4648 { padding: false }, secret)
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}
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fn totp(secret_bytes: &[u8]) -> u64 {
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oath::totp_raw_now(&secret_bytes, 6, 0, 30, &oath::HashType::SHA1)
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}
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}
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