2019-08-04 14:55:43 +00:00
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use data_encoding::BASE32;
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2019-08-03 16:47:52 +00:00
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use rocket::Route;
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use rocket_contrib::json::Json;
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2019-08-04 14:55:43 +00:00
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use crate::api::core::two_factor::_generate_recover_code;
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use crate::api::{EmptyResult, JsonResult, JsonUpcase, NumberOrString, PasswordData};
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2019-08-03 16:47:52 +00:00
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use crate::auth::Headers;
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use crate::crypto;
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use crate::db::{
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2019-08-03 18:09:20 +00:00
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models::{TwoFactor, TwoFactorType},
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2019-08-04 14:55:43 +00:00
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DbConn,
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2019-08-03 16:47:52 +00:00
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};
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pub fn routes() -> Vec<Route> {
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routes![
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generate_authenticator,
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activate_authenticator,
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activate_authenticator_put,
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]
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}
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#[post("/two-factor/get-authenticator", data = "<data>")]
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fn generate_authenticator(data: JsonUpcase<PasswordData>, headers: Headers, conn: DbConn) -> JsonResult {
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let data: PasswordData = data.into_inner().data;
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let user = headers.user;
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if !user.check_valid_password(&data.MasterPasswordHash) {
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err!("Invalid password");
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}
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let type_ = TwoFactorType::Authenticator as i32;
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let twofactor = TwoFactor::find_by_user_and_type(&user.uuid, type_, &conn);
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let (enabled, key) = match twofactor {
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Some(tf) => (true, tf.data),
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_ => (false, BASE32.encode(&crypto::get_random(vec![0u8; 20]))),
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};
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Ok(Json(json!({
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"Enabled": enabled,
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"Key": key,
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"Object": "twoFactorAuthenticator"
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})))
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}
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#[derive(Deserialize, Debug)]
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#[allow(non_snake_case)]
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struct EnableAuthenticatorData {
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MasterPasswordHash: String,
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Key: String,
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Token: NumberOrString,
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}
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#[post("/two-factor/authenticator", data = "<data>")]
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fn activate_authenticator(data: JsonUpcase<EnableAuthenticatorData>, headers: Headers, conn: DbConn) -> JsonResult {
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let data: EnableAuthenticatorData = data.into_inner().data;
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let password_hash = data.MasterPasswordHash;
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let key = data.Key;
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let token = data.Token.into_i32()? as u64;
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let mut user = headers.user;
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if !user.check_valid_password(&password_hash) {
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err!("Invalid password");
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}
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// Validate key as base32 and 20 bytes length
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let decoded_key: Vec<u8> = match BASE32.decode(key.as_bytes()) {
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Ok(decoded) => decoded,
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_ => err!("Invalid totp secret"),
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};
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if decoded_key.len() != 20 {
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err!("Invalid key length")
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}
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let type_ = TwoFactorType::Authenticator;
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let twofactor = TwoFactor::new(user.uuid.clone(), type_, key.to_uppercase());
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// Validate the token provided with the key
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2019-10-10 15:32:20 +00:00
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validate_totp_code(&user.uuid, token, &twofactor.data, &conn)?;
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2019-08-03 16:47:52 +00:00
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_generate_recover_code(&mut user, &conn);
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twofactor.save(&conn)?;
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Ok(Json(json!({
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"Enabled": true,
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"Key": key,
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"Object": "twoFactorAuthenticator"
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})))
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}
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#[put("/two-factor/authenticator", data = "<data>")]
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fn activate_authenticator_put(data: JsonUpcase<EnableAuthenticatorData>, headers: Headers, conn: DbConn) -> JsonResult {
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activate_authenticator(data, headers, conn)
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}
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2019-08-04 14:55:43 +00:00
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2019-10-10 15:32:20 +00:00
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pub fn validate_totp_code_str(user_uuid: &str, totp_code: &str, secret: &str, conn: &DbConn) -> EmptyResult {
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2019-08-04 14:55:43 +00:00
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let totp_code: u64 = match totp_code.parse() {
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Ok(code) => code,
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_ => err!("TOTP code is not a number"),
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};
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2019-10-10 15:32:20 +00:00
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validate_totp_code(user_uuid, totp_code, secret, &conn)
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2019-08-04 14:55:43 +00:00
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}
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2019-10-10 15:32:20 +00:00
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pub fn validate_totp_code(user_uuid: &str, totp_code: u64, secret: &str, conn: &DbConn) -> EmptyResult {
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use oath::{totp_raw_custom_time, HashType};
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use std::time::{UNIX_EPOCH, SystemTime};
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2019-08-04 14:55:43 +00:00
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let decoded_secret = match BASE32.decode(secret.as_bytes()) {
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Ok(s) => s,
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Err(_) => err!("Invalid TOTP secret"),
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};
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2019-10-10 15:32:20 +00:00
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let mut twofactor = TwoFactor::find_by_user_and_type(&user_uuid, TwoFactorType::Authenticator as i32, &conn)?;
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// Get the current system time in UNIX Epoch (UTC)
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let current_time: u64 = SystemTime::now().duration_since(UNIX_EPOCH)
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.expect("Earlier than 1970-01-01 00:00:00 UTC").as_secs();
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2019-10-12 13:28:28 +00:00
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// The amount of steps back and forward in time
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let steps = 1;
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for step in -steps..=steps {
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let time_step = (current_time / 30) as i32 + step;
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// We need to calculate the time offsite and cast it as an i128.
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// Else we can't do math with it on a default u64 variable.
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let time_offset: i128 = (step * 30).into();
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let generated = totp_raw_custom_time(&decoded_secret, 6, 0, 30, (current_time as i128 + time_offset) as u64, &HashType::SHA1);
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// Check the the given code equals the generated and if the time_step is larger then the one last used.
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if generated == totp_code && time_step > twofactor.last_used {
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// If the step does not equals 0 the time is drifted either server or client side.
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if step != 0 {
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info!("TOTP Time drift detected. The step offset is {}", step);
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}
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// Save the last used time step so only totp time steps higher then this one are allowed.
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twofactor.last_used = time_step;
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twofactor.save(&conn)?;
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return Ok(());
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} else if generated == totp_code && time_step <= twofactor.last_used {
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warn!("This or a TOTP code within {} steps back and forward has already been used!", steps);
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err!("Invalid TOTP Code!");
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}
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2019-10-10 15:32:20 +00:00
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}
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// Else no valide code received, deny access
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err!("Invalid TOTP code!");
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2019-08-04 14:55:43 +00:00
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}
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