mirror of
https://gitlab.com/fabinfra/fabaccess/bffh.git
synced 2024-09-21 11:40:08 +02:00
728 lines
32 KiB
Rust
728 lines
32 KiB
Rust
use desfire::desfire::desfire::MAX_BYTES_PER_TRANSACTION;
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use desfire::desfire::Desfire;
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use desfire::error::Error as DesfireError;
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use desfire::iso7816_4::apduresponse::APDUResponse;
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use rsasl::error::{MechanismError, MechanismErrorKind, SASLError, SessionError};
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use rsasl::mechanism::Authentication;
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use rsasl::property::AuthId;
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use rsasl::session::{SessionData, StepResult};
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use rsasl::SASL;
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use serde::{Deserialize, Serialize};
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use std::convert::TryFrom;
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use std::fmt::{Debug, Display, Formatter};
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use std::io::Write;
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use std::sync::Arc;
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use crate::authentication::fabfire::FabFireCardKey;
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enum FabFireError {
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ParseError,
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SerializationError,
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DeserializationError(serde_json::Error),
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CardError(DesfireError),
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InvalidMagic(String),
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InvalidToken(String),
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InvalidURN(String),
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InvalidCredentials(String),
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Session(SessionError),
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}
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impl Debug for FabFireError {
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fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
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match self {
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FabFireError::ParseError => write!(f, "ParseError"),
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FabFireError::SerializationError => write!(f, "SerializationError"),
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FabFireError::DeserializationError(e) => write!(f, "DeserializationError: {}", e),
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FabFireError::CardError(err) => write!(f, "CardError: {}", err),
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FabFireError::InvalidMagic(magic) => write!(f, "InvalidMagic: {}", magic),
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FabFireError::InvalidToken(token) => write!(f, "InvalidToken: {}", token),
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FabFireError::InvalidURN(urn) => write!(f, "InvalidURN: {}", urn),
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FabFireError::InvalidCredentials(credentials) => {
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write!(f, "InvalidCredentials: {}", credentials)
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}
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FabFireError::Session(err) => write!(f, "Session: {}", err),
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}
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}
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}
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impl Display for FabFireError {
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fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
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match self {
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FabFireError::ParseError => write!(f, "ParseError"),
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FabFireError::SerializationError => write!(f, "SerializationError"),
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FabFireError::DeserializationError(e) => write!(f, "DeserializationError: {}", e),
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FabFireError::CardError(err) => write!(f, "CardError: {}", err),
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FabFireError::InvalidMagic(magic) => write!(f, "InvalidMagic: {}", magic),
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FabFireError::InvalidToken(token) => write!(f, "InvalidToken: {}", token),
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FabFireError::InvalidURN(urn) => write!(f, "InvalidURN: {}", urn),
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FabFireError::InvalidCredentials(credentials) => {
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write!(f, "InvalidCredentials: {}", credentials)
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}
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FabFireError::Session(err) => write!(f, "Session: {}", err),
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}
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}
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}
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impl MechanismError for FabFireError {
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fn kind(&self) -> MechanismErrorKind {
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match self {
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FabFireError::ParseError => MechanismErrorKind::Parse,
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FabFireError::SerializationError => MechanismErrorKind::Protocol,
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FabFireError::DeserializationError(_) => MechanismErrorKind::Parse,
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FabFireError::CardError(_) => MechanismErrorKind::Protocol,
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FabFireError::InvalidMagic(_) => MechanismErrorKind::Protocol,
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FabFireError::InvalidToken(_) => MechanismErrorKind::Protocol,
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FabFireError::InvalidURN(_) => MechanismErrorKind::Protocol,
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FabFireError::InvalidCredentials(_) => MechanismErrorKind::Protocol,
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FabFireError::Session(_) => MechanismErrorKind::Protocol,
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}
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}
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}
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#[derive(Debug, Deserialize, Serialize)]
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#[serde(rename_all = "camelCase")]
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struct CardInfo {
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#[serde(rename = "UID", with = "hex")]
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uid: [u8; 7],
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key_old: Option<Box<[u8]>>,
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key_new: Option<Box<[u8]>>,
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}
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struct KeyInfo {
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key_id: u8,
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key: Box<[u8]>,
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}
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struct AuthInfo {
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rnd_a: Vec<u8>,
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rnd_b: Vec<u8>,
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iv: Vec<u8>,
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}
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#[derive(Debug, Deserialize, Serialize)]
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#[serde(tag = "Cmd")]
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enum CardCommand {
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message {
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#[serde(rename = "MssgID", skip_serializing_if = "Option::is_none")]
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msg_id: Option<u32>,
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#[serde(rename = "ClrTxt", skip_serializing_if = "Option::is_none")]
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clr_txt: Option<String>,
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#[serde(rename = "AddnTxt", skip_serializing_if = "Option::is_none")]
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addn_txt: Option<String>,
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},
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sendPICC {
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#[serde(
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deserialize_with = "hex::deserialize",
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serialize_with = "hex::serialize_upper"
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)]
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data: Vec<u8>,
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},
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readPICC {
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#[serde(
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deserialize_with = "hex::deserialize",
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serialize_with = "hex::serialize_upper"
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)]
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data: Vec<u8>,
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},
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haltPICC,
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Key {
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data: String,
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},
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ConfirmUser,
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}
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enum Step {
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New,
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SelectApp,
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VerifyMagic,
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GetURN,
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GetToken,
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Authenticate1,
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Authenticate2,
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}
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pub struct FabFire {
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step: Step,
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card_info: Option<CardInfo>,
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key_info: Option<KeyInfo>,
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auth_info: Option<AuthInfo>,
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app_id: u32,
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local_urn: String,
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desfire: Desfire,
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}
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const MAGIC: &'static str = "FABACCESS\0DESFIRE\01.0\0";
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impl FabFire {
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pub fn new_server(_sasl: &SASL) -> Result<Box<dyn Authentication>, SASLError> {
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Ok(Box::new(Self {
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step: Step::New,
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card_info: None,
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key_info: None,
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auth_info: None,
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app_id: 0x464142,
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local_urn: "urn:fabaccess:lab:innovisionlab".to_string(),
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desfire: Desfire {
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card: None,
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session_key: None,
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cbc_iv: None,
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},
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}))
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}
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}
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impl Authentication for FabFire {
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fn step(
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&mut self,
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session: &mut SessionData,
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input: Option<&[u8]>,
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writer: &mut dyn Write,
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) -> StepResult {
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match self.step {
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Step::New => {
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tracing::trace!("Step: New");
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//receive card info (especially card UID) from reader
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return match input {
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None => Err(SessionError::InputDataRequired),
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Some(cardinfo) => {
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self.card_info = match serde_json::from_slice(cardinfo) {
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Ok(card_info) => Some(card_info),
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Err(e) => {
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tracing::error!("Deserializing card_info failed: {:?}", e);
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return Err(FabFireError::DeserializationError(e).into());
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}
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};
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//select application
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let buf = match self.desfire.select_application_cmd(self.app_id) {
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Ok(buf) => match Vec::<u8>::try_from(buf) {
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Ok(data) => data,
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Err(e) => {
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tracing::error!(
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"Failed to convert APDUCommand to Vec<u8>: {:?}",
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e
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);
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return Err(FabFireError::SerializationError.into());
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}
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},
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Err(e) => {
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tracing::error!("Failed to generate APDUCommand: {:?}", e);
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return Err(FabFireError::SerializationError.into());
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}
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};
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let cmd = CardCommand::sendPICC { data: buf };
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return match serde_json::to_vec(&cmd) {
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Ok(send_buf) => {
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self.step = Step::SelectApp;
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writer
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.write_all(&send_buf)
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.map_err(|e| SessionError::Io { source: e })?;
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Ok(rsasl::session::Step::NeedsMore(Some(send_buf.len())))
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}
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Err(e) => {
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tracing::error!("Failed to serialize APDUCommand: {:?}", e);
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Err(FabFireError::SerializationError.into())
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}
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};
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}
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};
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}
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Step::SelectApp => {
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tracing::trace!("Step: SelectApp");
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// check that we successfully selected the application
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let response: CardCommand = match input {
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None => {
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return Err(SessionError::InputDataRequired);
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}
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Some(buf) => match serde_json::from_slice(buf)
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.map_err(|e| FabFireError::DeserializationError(e))
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{
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Ok(response) => response,
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Err(e) => {
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tracing::error!("Deserializing data from card failed: {:?}", e);
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return Err(e.into());
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}
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},
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};
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let apdu_response = match response {
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CardCommand::readPICC { data } => APDUResponse::new(&*data),
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_ => {
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tracing::error!("Unexpected response: {:?}", response);
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return Err(FabFireError::ParseError.into());
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}
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};
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apdu_response
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.check()
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.map_err(|e| FabFireError::CardError(e))?;
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// request the contents of the file containing the magic string
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const MAGIC_FILE_ID: u8 = 0x01;
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let buf = match self
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.desfire
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.read_data_chunk_cmd(MAGIC_FILE_ID, 0, MAGIC.len())
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{
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Ok(buf) => match Vec::<u8>::try_from(buf) {
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Ok(data) => data,
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Err(e) => {
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tracing::error!("Failed to convert APDUCommand to Vec<u8>: {:?}", e);
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return Err(FabFireError::SerializationError.into());
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}
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},
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Err(e) => {
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tracing::error!("Failed to generate APDUCommand: {:?}", e);
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return Err(FabFireError::SerializationError.into());
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}
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};
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let cmd = CardCommand::sendPICC { data: buf };
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return match serde_json::to_vec(&cmd) {
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Ok(send_buf) => {
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self.step = Step::VerifyMagic;
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writer
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.write_all(&send_buf)
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.map_err(|e| SessionError::Io { source: e })?;
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Ok(rsasl::session::Step::NeedsMore(Some(send_buf.len())))
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}
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Err(e) => {
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tracing::error!("Failed to serialize APDUCommand: {:?}", e);
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Err(FabFireError::SerializationError.into())
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}
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};
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}
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Step::VerifyMagic => {
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tracing::trace!("Step: VerifyMagic");
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// verify the magic string to determine that we have a valid fabfire card
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let response: CardCommand = match input {
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None => {
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return Err(SessionError::InputDataRequired);
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}
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Some(buf) => match serde_json::from_slice(buf)
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.map_err(|e| FabFireError::DeserializationError(e))
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{
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Ok(response) => response,
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Err(e) => {
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tracing::error!("Deserializing data from card failed: {:?}", e);
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return Err(e.into());
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}
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},
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};
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let apdu_response = match response {
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CardCommand::readPICC { data } => APDUResponse::new(&*data),
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_ => {
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tracing::error!("Unexpected response: {:?}", response);
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return Err(FabFireError::ParseError.into());
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}
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};
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match apdu_response.check() {
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Ok(_) => {
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match apdu_response.body {
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Some(data) => {
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if std::str::from_utf8(data.as_slice()) != Ok(MAGIC) {
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tracing::error!("Invalid magic string");
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return Err(FabFireError::ParseError.into());
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}
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}
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None => {
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tracing::error!("No data returned from card");
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return Err(FabFireError::ParseError.into());
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}
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};
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}
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Err(e) => {
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tracing::error!("Got invalid APDUResponse: {:?}", e);
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return Err(FabFireError::ParseError.into());
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}
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}
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// request the contents of the file containing the URN
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const URN_FILE_ID: u8 = 0x02;
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let buf = match self.desfire.read_data_chunk_cmd(
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URN_FILE_ID,
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0,
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self.local_urn.as_bytes().len(),
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) {
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// TODO: support urn longer than 47 Bytes
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Ok(buf) => match Vec::<u8>::try_from(buf) {
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Ok(data) => data,
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Err(e) => {
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tracing::error!("Failed to convert APDUCommand to Vec<u8>: {:?}", e);
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return Err(FabFireError::SerializationError.into());
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}
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},
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Err(e) => {
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tracing::error!("Failed to generate APDUCommand: {:?}", e);
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return Err(FabFireError::SerializationError.into());
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}
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};
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let cmd = CardCommand::sendPICC { data: buf };
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return match serde_json::to_vec(&cmd) {
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Ok(send_buf) => {
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self.step = Step::GetURN;
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writer
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.write_all(&send_buf)
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.map_err(|e| SessionError::Io { source: e })?;
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Ok(rsasl::session::Step::NeedsMore(Some(send_buf.len())))
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}
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Err(e) => {
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tracing::error!("Failed to serialize APDUCommand: {:?}", e);
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Err(FabFireError::SerializationError.into())
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}
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};
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}
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Step::GetURN => {
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tracing::trace!("Step: GetURN");
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// parse the urn and match it to our local urn
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let response: CardCommand = match input {
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None => {
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return Err(SessionError::InputDataRequired);
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}
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Some(buf) => match serde_json::from_slice(buf)
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.map_err(|e| FabFireError::DeserializationError(e))
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{
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Ok(response) => response,
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Err(e) => {
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tracing::error!("Deserializing data from card failed: {:?}", e);
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return Err(e.into());
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}
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},
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};
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let apdu_response = match response {
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CardCommand::readPICC { data } => APDUResponse::new(&*data),
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_ => {
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tracing::error!("Unexpected response: {:?}", response);
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return Err(FabFireError::ParseError.into());
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}
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};
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match apdu_response.check() {
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Ok(_) => {
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match apdu_response.body {
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Some(data) => {
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let received_urn = String::from_utf8(data).unwrap();
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if received_urn != self.local_urn {
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tracing::error!(
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"URN mismatch: {:?} != {:?}",
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received_urn,
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self.local_urn
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);
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return Err(FabFireError::ParseError.into());
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}
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}
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None => {
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tracing::error!("No data returned from card");
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return Err(FabFireError::ParseError.into());
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}
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};
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}
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Err(e) => {
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tracing::error!("Got invalid APDUResponse: {:?}", e);
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return Err(FabFireError::ParseError.into());
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}
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}
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// request the contents of the file containing the URN
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const TOKEN_FILE_ID: u8 = 0x03;
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let buf = match self.desfire.read_data_chunk_cmd(
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TOKEN_FILE_ID,
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0,
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MAX_BYTES_PER_TRANSACTION,
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) {
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// TODO: support data longer than 47 Bytes
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Ok(buf) => match Vec::<u8>::try_from(buf) {
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Ok(data) => data,
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Err(e) => {
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tracing::error!("Failed to convert APDUCommand to Vec<u8>: {:?}", e);
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return Err(FabFireError::SerializationError.into());
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}
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},
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Err(e) => {
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tracing::error!("Failed to generate APDUCommand: {:?}", e);
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return Err(FabFireError::SerializationError.into());
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}
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};
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let cmd = CardCommand::sendPICC { data: buf };
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return match serde_json::to_vec(&cmd) {
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Ok(send_buf) => {
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self.step = Step::GetToken;
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writer
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.write_all(&send_buf)
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.map_err(|e| SessionError::Io { source: e })?;
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Ok(rsasl::session::Step::NeedsMore(Some(send_buf.len())))
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}
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Err(e) => {
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tracing::error!("Failed to serialize APDUCommand: {:?}", e);
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Err(FabFireError::SerializationError.into())
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}
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};
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}
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Step::GetToken => {
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// println!("Step: GetToken");
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// parse the token and select the appropriate user
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let response: CardCommand = match input {
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None => {
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return Err(SessionError::InputDataRequired);
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}
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Some(buf) => match serde_json::from_slice(buf)
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.map_err(|e| FabFireError::DeserializationError(e))
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{
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Ok(response) => response,
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Err(e) => {
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tracing::error!("Deserializing data from card failed: {:?}", e);
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return Err(e.into());
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}
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},
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};
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let apdu_response = match response {
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CardCommand::readPICC { data } => APDUResponse::new(&*data),
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_ => {
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tracing::error!("Unexpected response: {:?}", response);
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return Err(FabFireError::ParseError.into());
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}
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};
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match apdu_response.check() {
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Ok(_) => {
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match apdu_response.body {
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Some(data) => {
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let token = String::from_utf8(data).unwrap();
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session.set_property::<AuthId>(Arc::new(
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token.trim_matches(char::from(0)).to_string(),
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));
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let key = match session.get_property_or_callback::<FabFireCardKey>()
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{
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Ok(Some(key)) => Box::from(key.as_slice()),
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Ok(None) => {
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tracing::error!("No keys on file for token");
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return Err(FabFireError::InvalidCredentials(
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"No keys on file for token".to_string(),
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)
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.into());
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}
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|
Err(e) => {
|
|
tracing::error!("Failed to get key: {:?}", e);
|
|
return Err(FabFireError::Session(e).into());
|
|
}
|
|
};
|
|
self.key_info = Some(KeyInfo { key_id: 0x01, key });
|
|
}
|
|
None => {
|
|
tracing::error!("No data in response");
|
|
return Err(FabFireError::ParseError.into());
|
|
}
|
|
};
|
|
}
|
|
Err(e) => {
|
|
tracing::error!("Failed to check response: {:?}", e);
|
|
return Err(FabFireError::ParseError.into());
|
|
}
|
|
}
|
|
|
|
let buf = match self
|
|
.desfire
|
|
.authenticate_iso_aes_challenge_cmd(self.key_info.as_ref().unwrap().key_id)
|
|
{
|
|
Ok(buf) => match Vec::<u8>::try_from(buf) {
|
|
Ok(data) => data,
|
|
Err(e) => {
|
|
tracing::error!("Failed to convert to Vec<u8>: {:?}", e);
|
|
return Err(FabFireError::SerializationError.into());
|
|
}
|
|
},
|
|
Err(e) => {
|
|
tracing::error!("Failed to create authenticate command: {:?}", e);
|
|
return Err(FabFireError::SerializationError.into());
|
|
}
|
|
};
|
|
let cmd = CardCommand::sendPICC { data: buf };
|
|
return match serde_json::to_vec(&cmd) {
|
|
Ok(send_buf) => {
|
|
self.step = Step::Authenticate1;
|
|
writer
|
|
.write_all(&send_buf)
|
|
.map_err(|e| SessionError::Io { source: e })?;
|
|
Ok(rsasl::session::Step::NeedsMore(Some(send_buf.len())))
|
|
}
|
|
Err(e) => {
|
|
tracing::error!("Failed to serialize command: {:?}", e);
|
|
Err(FabFireError::SerializationError.into())
|
|
}
|
|
};
|
|
}
|
|
Step::Authenticate1 => {
|
|
tracing::trace!("Step: Authenticate1");
|
|
let response: CardCommand = match input {
|
|
None => {
|
|
return Err(SessionError::InputDataRequired);
|
|
}
|
|
Some(buf) => match serde_json::from_slice(buf)
|
|
.map_err(|e| FabFireError::DeserializationError(e))
|
|
{
|
|
Ok(response) => response,
|
|
Err(e) => {
|
|
tracing::error!("Failed to deserialize response: {:?}", e);
|
|
return Err(e.into());
|
|
}
|
|
},
|
|
};
|
|
|
|
let apdu_response = match response {
|
|
CardCommand::readPICC { data } => APDUResponse::new(&*data),
|
|
_ => {
|
|
tracing::error!("Unexpected response: {:?}", response);
|
|
return Err(FabFireError::ParseError.into());
|
|
}
|
|
};
|
|
|
|
match apdu_response.check() {
|
|
Ok(_) => {
|
|
match apdu_response.body {
|
|
Some(data) => {
|
|
let rnd_b_enc = data.as_slice();
|
|
|
|
//FIXME: This is ugly, we should find a better way to make the function testable
|
|
//TODO: Check if we need a CSPRNG here
|
|
let rnd_a: [u8; 16] = rand::random();
|
|
|
|
let (cmd_challenge_response, rnd_b, iv) = self
|
|
.desfire
|
|
.authenticate_iso_aes_response_cmd(
|
|
rnd_b_enc,
|
|
&*(self.key_info.as_ref().unwrap().key),
|
|
&rnd_a,
|
|
)
|
|
.unwrap();
|
|
self.auth_info = Some(AuthInfo {
|
|
rnd_a: Vec::<u8>::from(rnd_a),
|
|
rnd_b,
|
|
iv,
|
|
});
|
|
let buf = match Vec::<u8>::try_from(cmd_challenge_response) {
|
|
Ok(data) => data,
|
|
Err(e) => {
|
|
tracing::error!("Failed to convert to Vec<u8>: {:?}", e);
|
|
return Err(FabFireError::SerializationError.into());
|
|
}
|
|
};
|
|
let cmd = CardCommand::sendPICC { data: buf };
|
|
return match serde_json::to_vec(&cmd) {
|
|
Ok(send_buf) => {
|
|
self.step = Step::Authenticate2;
|
|
writer
|
|
.write_all(&send_buf)
|
|
.map_err(|e| SessionError::Io { source: e })?;
|
|
Ok(rsasl::session::Step::NeedsMore(Some(send_buf.len())))
|
|
}
|
|
Err(e) => {
|
|
tracing::error!("Failed to serialize command: {:?}", e);
|
|
Err(FabFireError::SerializationError.into())
|
|
}
|
|
};
|
|
}
|
|
None => {
|
|
tracing::error!("Got invalid response: {:?}", apdu_response);
|
|
return Err(FabFireError::ParseError.into());
|
|
}
|
|
};
|
|
}
|
|
Err(e) => {
|
|
tracing::error!("Failed to check response: {:?}", e);
|
|
return Err(FabFireError::ParseError.into());
|
|
}
|
|
}
|
|
}
|
|
Step::Authenticate2 => {
|
|
// println!("Step: Authenticate2");
|
|
let response: CardCommand = match input {
|
|
None => {
|
|
return Err(SessionError::InputDataRequired);
|
|
}
|
|
Some(buf) => match serde_json::from_slice(buf)
|
|
.map_err(|e| FabFireError::DeserializationError(e))
|
|
{
|
|
Ok(response) => response,
|
|
Err(e) => {
|
|
tracing::error!("Failed to deserialize response: {:?}", e);
|
|
return Err(e.into());
|
|
}
|
|
},
|
|
};
|
|
|
|
let apdu_response = match response {
|
|
CardCommand::readPICC { data } => APDUResponse::new(&*data),
|
|
_ => {
|
|
tracing::error!("Got invalid response: {:?}", response);
|
|
return Err(FabFireError::ParseError.into());
|
|
}
|
|
};
|
|
|
|
match apdu_response.check() {
|
|
Ok(_) => {
|
|
match apdu_response.body {
|
|
Some(data) => match self.auth_info.as_ref() {
|
|
None => {
|
|
return Err(FabFireError::ParseError.into());
|
|
}
|
|
Some(auth_info) => {
|
|
if self
|
|
.desfire
|
|
.authenticate_iso_aes_verify(
|
|
data.as_slice(),
|
|
auth_info.rnd_a.as_slice(),
|
|
auth_info.rnd_b.as_slice(),
|
|
&*(self.key_info.as_ref().unwrap().key),
|
|
auth_info.iv.as_slice(),
|
|
)
|
|
.is_ok()
|
|
{
|
|
let cmd = CardCommand::message {
|
|
msg_id: Some(4),
|
|
clr_txt: None,
|
|
addn_txt: Some("".to_string()),
|
|
};
|
|
return match serde_json::to_vec(&cmd) {
|
|
Ok(send_buf) => {
|
|
self.step = Step::Authenticate1;
|
|
writer
|
|
.write_all(&send_buf)
|
|
.map_err(|e| SessionError::Io { source: e })?;
|
|
return Ok(rsasl::session::Step::Done(Some(
|
|
send_buf.len(),
|
|
)));
|
|
}
|
|
Err(e) => {
|
|
tracing::error!(
|
|
"Failed to serialize command: {:?}",
|
|
e
|
|
);
|
|
Err(FabFireError::SerializationError.into())
|
|
}
|
|
};
|
|
}
|
|
}
|
|
},
|
|
None => {
|
|
tracing::error!("got empty response");
|
|
return Err(FabFireError::ParseError.into());
|
|
}
|
|
};
|
|
}
|
|
Err(_e) => {
|
|
tracing::error!("Got invalid response: {:?}", apdu_response);
|
|
return Err(
|
|
FabFireError::InvalidCredentials(format!("{}", apdu_response)).into(),
|
|
);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return Ok(rsasl::session::Step::Done(None));
|
|
}
|
|
}
|