mirror of
https://github.com/LordGrimmauld/yubi-oath-rs.git
synced 2025-03-04 05:44:40 +01:00
refactor: use Duration, SystemTime and Range<SystemTime>
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parent
3a4b703a44
commit
7d3600d684
3 changed files with 65 additions and 50 deletions
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@ -1,11 +1,11 @@
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use std::fmt::Display;
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use std::{fmt::Display, time::Duration};
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use iso7816_tlv::simple::Tlv;
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use sha1::Digest;
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pub const INS_SELECT: u8 = 0xa4;
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pub const OATH_AID: [u8; 7] = [0xa0, 0x00, 0x00, 0x05, 0x27, 0x21, 0x01];
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pub const DEFAULT_PERIOD: u32 = 30;
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pub const DEFAULT_PERIOD: Duration = Duration::from_secs(30);
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pub const DEFAULT_DIGITS: OathDigits = OathDigits::Six;
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pub const DEFAULT_IMF: u32 = 0;
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96
src/lib.rs
96
src/lib.rs
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@ -6,7 +6,11 @@ use transaction::*;
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mod oath_credential;
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mod oath_credentialid;
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/// Utilities for interacting with YubiKey OATH/TOTP functionality
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use std::{fmt::Display, time::Duration, time::SystemTime};
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use std::{
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fmt::Display,
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ops::{Range, RangeInclusive},
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time::{Duration, Instant, SystemTime},
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};
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use base64::{engine::general_purpose, Engine as _};
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use hmac::{Hmac, Mac};
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@ -40,16 +44,6 @@ fn _hmac_shorten_key(key: &[u8], algo: HashAlgo) -> Vec<u8> {
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}
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}
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fn _get_challenge(timestamp: u64, period: u64) -> [u8; 8] {
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(timestamp / period).to_be_bytes()
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}
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fn time_to_u64(timestamp: SystemTime) -> u64 {
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timestamp
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.duration_since(SystemTime::UNIX_EPOCH)
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.as_ref()
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.map_or(0, Duration::as_secs)
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}
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pub struct OathSession<'a> {
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version: &'a [u8],
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salt: &'a [u8],
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@ -66,8 +60,7 @@ fn clone_with_lifetime(data: &[u8]) -> Vec<u8> {
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pub struct RefreshableOathCredential<'a> {
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pub cred: OathCredential,
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pub code: Option<OathCodeDisplay>,
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pub valid_from: u64,
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pub valid_to: u64,
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pub valid_timeframe: Range<SystemTime>,
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refresh_provider: &'a OathSession<'a>,
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}
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@ -86,15 +79,14 @@ impl<'a> RefreshableOathCredential<'a> {
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RefreshableOathCredential {
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cred,
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code: None,
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valid_from: 0,
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valid_to: 0,
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valid_timeframe: SystemTime::UNIX_EPOCH..SystemTime::UNIX_EPOCH,
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refresh_provider,
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}
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}
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pub fn force_update(&mut self, code: Option<OathCodeDisplay>, timestamp: SystemTime) {
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self.code = code;
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(self.valid_from, self.valid_to) =
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self.valid_timeframe =
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RefreshableOathCredential::format_validity_time_frame(self, timestamp);
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}
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@ -115,20 +107,30 @@ impl<'a> RefreshableOathCredential<'a> {
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}
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pub fn is_valid(&self) -> bool {
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let current_time = time_to_u64(SystemTime::now());
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self.valid_from <= current_time && current_time <= self.valid_to
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self.valid_timeframe.contains(&SystemTime::now())
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}
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fn format_validity_time_frame(&self, timestamp: SystemTime) -> (u64, u64) {
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let timestamp_seconds = time_to_u64(timestamp);
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fn format_validity_time_frame(&self, timestamp: SystemTime) -> Range<SystemTime> {
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match self.cred.id_data.oath_type {
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OathType::Totp => {
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let time_step = timestamp_seconds / (self.cred.id_data.period as u64);
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let valid_from = time_step * (self.cred.id_data.period as u64);
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let valid_to = (time_step + 1) * (self.cred.id_data.period as u64);
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(valid_from, valid_to)
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let timestamp_seconds = timestamp
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.duration_since(SystemTime::UNIX_EPOCH)
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.as_ref()
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.map_or(0, Duration::as_secs);
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let time_step = timestamp_seconds / (self.cred.id_data.period.as_secs());
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let valid_from = SystemTime::UNIX_EPOCH
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.checked_add(self.cred.id_data.period.saturating_mul(time_step as u32))
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.unwrap();
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// time_step * (self.cred.id_data.period.as_secs());
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let valid_to = valid_from.checked_add(self.cred.id_data.period).unwrap();
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valid_from..valid_to
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}
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OathType::Hotp => {
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timestamp
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..SystemTime::UNIX_EPOCH
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.checked_add(Duration::from_secs(u64::MAX))
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.unwrap()
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}
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OathType::Hotp => (timestamp_seconds, 0x7FFFFFFFFFFFFFFF),
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}
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}
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}
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@ -146,18 +148,21 @@ impl OathSession<'_> {
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}
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Ok(Self {
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version: clone_with_lifetime(
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info_map.get(&(Tag::Version as u8)).unwrap_or(&vec![0u8; 0]),
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)
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.leak(),
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salt: clone_with_lifetime(info_map.get(&(Tag::Name as u8)).unwrap_or(&vec![0u8; 0]))
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version: info_map
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.get(&(Tag::Version as u8))
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.unwrap_or(&vec![0u8; 0])
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.to_owned()
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.leak(),
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salt: info_map
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.get(&(Tag::Name as u8))
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.unwrap_or(&vec![0u8; 0])
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.to_owned()
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.leak(),
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challenge: info_map
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.get(&(Tag::Challenge as u8))
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.unwrap_or(&vec![0u8; 0])
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.to_owned()
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.leak(),
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challenge: clone_with_lifetime(
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info_map
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.get(&(Tag::Challenge as u8))
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.unwrap_or(&vec![0u8; 0]),
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)
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.leak(),
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name: name.to_string(),
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transaction_context,
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})
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@ -202,13 +207,13 @@ impl OathSession<'_> {
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return Err(Error::DeviceMismatch);
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}
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let timestamp = time_to_u64(timestamp_sys.unwrap_or_else(SystemTime::now));
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let timestamp = timestamp_sys.unwrap_or_else(SystemTime::now);
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let mut data = cred.id_data.as_tlv();
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if cred.id_data.oath_type == OathType::Totp {
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data.extend(to_tlv(
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Tag::Challenge,
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&_get_challenge(timestamp, cred.id_data.period as u64),
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&time_challenge(Some(timestamp), Some(cred.id_data.period)),
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));
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}
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@ -239,7 +244,10 @@ impl OathSession<'_> {
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Instruction::CalculateAll as u8,
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0,
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0x01,
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Some(&to_tlv(Tag::Challenge, &time_challenge(Some(timestamp)))),
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Some(&to_tlv(
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Tag::Challenge,
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&time_challenge(Some(timestamp), None),
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)),
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);
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let mut key_buffer = Vec::new();
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@ -286,6 +294,12 @@ impl OathSession<'_> {
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}
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}
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fn time_challenge(timestamp: Option<SystemTime>) -> [u8; 8] {
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(time_to_u64(timestamp.unwrap_or_else(SystemTime::now)) / 30).to_be_bytes()
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fn time_challenge(timestamp: Option<SystemTime>, period: Option<Duration>) -> [u8; 8] {
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(timestamp
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.unwrap_or_else(SystemTime::now)
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.duration_since(SystemTime::UNIX_EPOCH)
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.as_ref()
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.map_or(0, Duration::as_secs)
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/ period.unwrap_or(DEFAULT_PERIOD).as_secs())
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.to_be_bytes()
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}
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@ -1,4 +1,4 @@
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use std::fmt::Display;
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use std::{fmt::Display, time::Duration};
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use regex::Regex;
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@ -9,7 +9,7 @@ pub struct CredentialIDData {
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pub name: String,
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pub oath_type: OathType,
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pub issuer: Option<String>,
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pub period: u32,
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pub period: Duration,
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}
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impl Display for CredentialIDData {
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@ -34,7 +34,7 @@ impl CredentialIDData {
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let mut cred_id = String::new();
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if self.oath_type == OathType::Totp && self.period != DEFAULT_PERIOD {
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cred_id.push_str(&format!("{}/", self.period));
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cred_id.push_str(&format!("{}/", self.period.as_secs()));
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}
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if let Some(issuer) = self.issuer.as_deref() {
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@ -46,10 +46,10 @@ impl CredentialIDData {
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}
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// Function to parse the credential ID
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fn parse_cred_id(cred_id: &[u8], oath_type: OathType) -> (Option<String>, String, u32) {
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fn parse_cred_id(cred_id: &[u8], oath_type: OathType) -> (Option<String>, String, Duration) {
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let data = match std::str::from_utf8(cred_id) {
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Ok(d) => d,
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Err(_) => return (None, String::new(), 0), // Handle invalid UTF-8
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Err(_) => return (None, String::new(), Duration::ZERO), // Handle invalid UTF-8
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};
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if oath_type == OathType::Totp {
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@ -60,13 +60,14 @@ impl CredentialIDData {
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let period = caps
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.get(2)
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.and_then(|s| s.as_str().parse::<u32>().ok())
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.map(|t| Duration::from_secs(t as u64))
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.unwrap_or(DEFAULT_PERIOD);
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(Some(caps[4].to_string()), caps[5].to_string(), period)
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})
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} else {
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data.split_once(':')
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.map_or((None, data.to_string(), 0), |(i, n)| {
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(Some(i.to_string()), n.to_string(), 0)
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.map_or((None, data.to_string(), Duration::ZERO), |(i, n)| {
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(Some(i.to_string()), n.to_string(), Duration::ZERO)
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})
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}
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}
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