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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use net_traits::IncludeSubdomains;
use net_traits::pub_domains::reg_suffix;
use serde_json;
use servo_config::resource_files::read_resource_file;
use servo_url::ServoUrl;
use std::collections::HashMap;
use std::net::{Ipv4Addr, Ipv6Addr};
use std::str::from_utf8;
use time;
#[derive(Clone, Deserialize, Serialize)]
pub struct HstsEntry {
pub host: String,
pub include_subdomains: bool,
pub max_age: Option<u64>,
pub timestamp: Option<u64>
}
impl HstsEntry {
pub fn new(host: String, subdomains: IncludeSubdomains, max_age: Option<u64>) -> Option<HstsEntry> {
if host.parse::<Ipv4Addr>().is_ok() || host.parse::<Ipv6Addr>().is_ok() {
None
} else {
Some(HstsEntry {
host: host,
include_subdomains: (subdomains == IncludeSubdomains::Included),
max_age: max_age,
timestamp: Some(time::get_time().sec as u64)
})
}
}
pub fn is_expired(&self) -> bool {
match (self.max_age, self.timestamp) {
(Some(max_age), Some(timestamp)) => {
(time::get_time().sec as u64) - timestamp >= max_age
}
_ => false
}
}
fn matches_domain(&self, host: &str) -> bool {
!self.is_expired() && self.host == host
}
fn matches_subdomain(&self, host: &str) -> bool {
!self.is_expired() && host.ends_with(&format!(".{}", self.host))
}
}
#[derive(Clone, Deserialize, Serialize)]
pub struct HstsList {
pub entries_map: HashMap<String, Vec<HstsEntry>>,
}
impl HstsList {
pub fn new() -> HstsList {
HstsList { entries_map: HashMap::new() }
}
/// Create an `HstsList` from the bytes of a JSON preload file.
pub fn from_preload(preload_content: &[u8]) -> Option<HstsList> {
#[derive(Deserialize)]
struct HstsEntries {
entries: Vec<HstsEntry>,
}
let hsts_entries: Option<HstsEntries> = from_utf8(&preload_content)
.ok()
.and_then(|c| serde_json::from_str(c).ok());
hsts_entries.map_or(None, |hsts_entries| {
let mut hsts_list: HstsList = HstsList::new();
for hsts_entry in hsts_entries.entries {
hsts_list.push(hsts_entry);
}
return Some(hsts_list);
})
}
pub fn from_servo_preload() -> HstsList {
let file_bytes = read_resource_file("hsts_preload.json")
.expect("Could not find Servo HSTS preload file");
HstsList::from_preload(&file_bytes)
.expect("Servo HSTS preload file is invalid")
}
pub fn is_host_secure(&self, host: &str) -> bool {
let base_domain = reg_suffix(host);
self.entries_map.get(base_domain).map_or(false, |entries| {
entries.iter().any(|e| {
if e.include_subdomains {
e.matches_subdomain(host) || e.matches_domain(host)
} else {
e.matches_domain(host)
}
})
})
}
fn has_domain(&self, host: &str, base_domain: &str) -> bool {
self.entries_map.get(base_domain).map_or(false, |entries| {
entries.iter().any(|e| e.matches_domain(&host))
})
}
fn has_subdomain(&self, host: &str, base_domain: &str) -> bool {
self.entries_map.get(base_domain).map_or(false, |entries| {
entries.iter().any(|e| e.matches_subdomain(host))
})
}
pub fn push(&mut self, entry: HstsEntry) {
let host = entry.host.clone();
let base_domain = reg_suffix(&host);
let have_domain = self.has_domain(&entry.host, base_domain);
let have_subdomain = self.has_subdomain(&entry.host, base_domain);
let entries = self.entries_map.entry(base_domain.to_owned()).or_insert(vec![]);
if !have_domain && !have_subdomain {
entries.push(entry);
} else if !have_subdomain {
for e in entries {
if e.matches_domain(&entry.host) {
e.include_subdomains = entry.include_subdomains;
e.max_age = entry.max_age;
}
}
}
}
/// Step 10 of https://fetch.spec.whatwg.org/#concept-main-fetch.
pub fn switch_known_hsts_host_domain_url_to_https(&self, url: &mut ServoUrl) {
if url.scheme() != "http" {
return;
}
if url.domain().map_or(false, |domain| self.is_host_secure(domain)) {
url.as_mut_url().set_scheme("https").unwrap();
}
}
}
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