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// Copyright 2017-2018 int08h LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
extern crate hex;
use std::fs::File;
use std::io::Read;
use std::time::Duration;
use yaml_rust::YamlLoader;
use config::ServerConfig;
use config::{DEFAULT_BATCH_SIZE, DEFAULT_STATUS_INTERVAL};
use Error;
use key::KeyProtection;
///
/// Read a Roughenough server configuration ([ServerConfig](trait.ServerConfig.html))
/// from a YAML file.
///
/// Example config:
///
/// ```yaml
/// interface: 127.0.0.1
/// port: 8686
/// seed: f61075c988feb9cb700a4a6a3291bfbc9cab11b9c9eca8c802468eb38a43d7d3
/// ```
///
pub struct FileConfig {
port: u16,
interface: String,
seed: Vec<u8>,
batch_size: u8,
status_interval: Duration,
key_protection: KeyProtection,
}
impl FileConfig {
pub fn new(config_file: &str) -> Result<Self, Error> {
let mut infile = File::open(config_file).expect("failed to open config file");
let mut contents = String::new();
infile
.read_to_string(&mut contents)
.expect("could not read config file");
let cfg = YamlLoader::load_from_str(&contents).expect("could not parse config file");
if cfg.len() != 1 {
return Err(Error::InvalidConfiguration(
"Empty or malformed config file".to_string(),
));
}
let mut config = FileConfig {
port: 0,
interface: "".to_string(),
seed: Vec::new(),
batch_size: DEFAULT_BATCH_SIZE,
status_interval: DEFAULT_STATUS_INTERVAL,
key_protection: KeyProtection::Plaintext,
};
for (key, value) in cfg[0].as_hash().unwrap() {
match key.as_str().unwrap() {
"port" => config.port = value.as_i64().unwrap() as u16,
"interface" => config.interface = value.as_str().unwrap().to_string(),
"batch_size" => config.batch_size = value.as_i64().unwrap() as u8,
"seed" => {
let val = value.as_str().unwrap().to_string();
config.seed = hex::decode(val)
.expect("seed value invalid; 'seed' should be 32 byte hex value");
}
"status_interval" => {
let val = value.as_i64().expect("status_interval value invalid");
config.status_interval = Duration::from_secs(val as u64)
}
"key_protection" => {
let val = value.as_str().unwrap()
.parse()
.expect(format!("invalid key_protection value: {:?}", value).as_ref());
config.key_protection = val
}
unknown => {
return Err(Error::InvalidConfiguration(format!(
"unknown config key: {}",
unknown
)));
}
}
}
Ok(config)
}
}
impl ServerConfig for FileConfig {
fn interface(&self) -> &str {
self.interface.as_ref()
}
fn port(&self) -> u16 {
self.port
}
fn seed(&self) -> Vec<u8> {
self.seed.clone()
}
fn batch_size(&self) -> u8 {
self.batch_size
}
fn status_interval(&self) -> Duration {
self.status_interval
}
fn key_protection(&self) -> &KeyProtection {
&self.key_protection
}
}
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