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fix fabfire mechanism integration and improve logging

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This commit is contained in:
Kai Jan Kriegel 2022-03-19 06:00:21 +01:00
parent 41f8b83cd5
commit 831b18128d
4 changed files with 97 additions and 47 deletions
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114
bffhd/authentication/fabfire/server.rs
View File

@ -12,6 +12,7 @@ use std::convert::TryFrom;
use std::sync::Arc;
use desfire::desfire::desfire::MAX_BYTES_PER_TRANSACTION;
use rsasl::property::AuthId;
use tracing::{error, trace};
use crate::authentication::fabfire::FabFireCardKey;
enum FabFireError {
@ -152,7 +153,7 @@ impl Authentication for FabFire {
fn step(&mut self, session: &mut SessionData, input: Option<&[u8]>, writer: &mut dyn Write) -> StepResult {
match self.step {
Step::New => {
// println!("Step: New");
tracing::trace!("Step: New");
//receive card info (especially card UID) from reader
return match input {
None => { Err(SessionError::InputDataRequired) }
@ -160,7 +161,7 @@ impl Authentication for FabFire {
self.card_info = match serde_json::from_slice(cardinfo) {
Ok(card_info) => Some(card_info),
Err(e) => {
// eprintln!("{:?}", e);
tracing::error!("Deserializing card_info failed: {:?}", e);
return Err(FabFireError::DeserializationError(e).into());
}
};
@ -169,12 +170,12 @@ impl Authentication for FabFire {
Ok(buf) => match Vec::<u8>::try_from(buf) {
Ok(data) => data,
Err(e) => {
// eprintln!("Failed to convert APDUCommand to Vec<u8>: {:?}", e);
tracing::error!("Failed to convert APDUCommand to Vec<u8>: {:?}", e);
return Err(FabFireError::SerializationError.into());
}
},
Err(e) => {
// eprintln!("Failed to generate APDUCommand: {:?}", e);
tracing::error!("Failed to generate APDUCommand: {:?}", e);
return Err(FabFireError::SerializationError.into());
}
};
@ -186,7 +187,7 @@ impl Authentication for FabFire {
Ok(rsasl::session::Step::NeedsMore(Some(send_buf.len())))
}
Err(e) => {
// eprintln!("Failed to serialize APDUCommand: {:?}", e);
tracing::error!("Failed to serialize APDUCommand: {:?}", e);
Err(FabFireError::SerializationError.into())
}
};
@ -194,14 +195,14 @@ impl Authentication for FabFire {
};
}
Step::SelectApp => {
// println!("Step: SelectApp");
tracing::trace!("Step: SelectApp");
// check that we successfully selected the application
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) => {
// eprintln!("{:?}", e);
tracing::error!("Deserializing data from card failed: {:?}", e);
return Err(e.into());
}
}
@ -210,7 +211,7 @@ impl Authentication for FabFire {
let apdu_response = match response {
CardCommand::readPICC { data } => { APDUResponse::new(&*data) }
_ => {
// eprintln!("Unexpected response: {:?}", response);
tracing::error!("Unexpected response: {:?}", response);
return Err(FabFireError::ParseError.into());
}
};
@ -223,11 +224,13 @@ impl Authentication for FabFire {
let buf = match self.desfire.read_data_chunk_cmd(MAGIC_FILE_ID, 0, MAGIC.len()) {
Ok(buf) => match Vec::<u8>::try_from(buf) {
Ok(data) => data,
Err(_) => {
Err(e) => {
tracing::error!("Failed to convert APDUCommand to Vec<u8>: {:?}", e);
return Err(FabFireError::SerializationError.into());
}
},
Err(_) => {
Err(e) => {
tracing::error!("Failed to generate APDUCommand: {:?}", e);
return Err(FabFireError::SerializationError.into());
}
};
@ -238,20 +241,21 @@ impl Authentication for FabFire {
writer.write_all(&send_buf).map_err(|e| SessionError::Io { source: e })?;
Ok(rsasl::session::Step::NeedsMore(Some(send_buf.len())))
}
Err(_) => {
Err(e) => {
tracing::error!("Failed to serialize APDUCommand: {:?}", e);
Err(FabFireError::SerializationError.into())
}
};
}
Step::VerifyMagic => {
// println!("Step: VerifyMagic");
tracing::trace!("Step: VerifyMagic");
// verify the magic string to determine that we have a valid fabfire card
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) => {
// eprintln!("{:?}", e);
tracing::error!("Deserializing data from card failed: {:?}", e);
return Err(e.into());
}
}
@ -260,7 +264,7 @@ impl Authentication for FabFire {
let apdu_response = match response {
CardCommand::readPICC { data } => { APDUResponse::new(&*data) }
_ => {
// eprintln!("Unexpected response: {:?}", response);
tracing::error!("Unexpected response: {:?}", response);
return Err(FabFireError::ParseError.into());
}
};
@ -271,15 +275,18 @@ impl Authentication for FabFire {
match apdu_response.body {
Some(data) => {
if std::str::from_utf8(data.as_slice()) != Ok(MAGIC) {
tracing::error!("Invalid magic string");
return Err(FabFireError::ParseError.into());
}
}
None => {
tracing::error!("No data returned from card");
return Err(FabFireError::ParseError.into());
}
};
}
Err(_) => {
Err(e) => {
tracing::error!("Got invalid APDUResponse: {:?}", e);
return Err(FabFireError::ParseError.into());
}
}
@ -291,11 +298,13 @@ impl Authentication for FabFire {
let buf = match self.desfire.read_data_chunk_cmd(URN_FILE_ID, 0, self.local_urn.as_bytes().len()) { // TODO: support urn longer than 47 Bytes
Ok(buf) => match Vec::<u8>::try_from(buf) {
Ok(data) => data,
Err(_) => {
Err(e) => {
tracing::error!("Failed to convert APDUCommand to Vec<u8>: {:?}", e);
return Err(FabFireError::SerializationError.into());
}
},
Err(_) => {
Err(e) => {
tracing::error!("Failed to generate APDUCommand: {:?}", e);
return Err(FabFireError::SerializationError.into());
}
};
@ -306,20 +315,21 @@ impl Authentication for FabFire {
writer.write_all(&send_buf).map_err(|e| SessionError::Io { source: e })?;
Ok(rsasl::session::Step::NeedsMore(Some(send_buf.len())))
}
Err(_) => {
Err(e) => {
tracing::error!("Failed to serialize APDUCommand: {:?}", e);
Err(FabFireError::SerializationError.into())
}
};
}
Step::GetURN => {
// println!("Step: GetURN");
tracing::trace!("Step: GetURN");
// parse the urn and match it to our local urn
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) => {
// eprintln!("{:?}", e);
tracing::error!("Deserializing data from card failed: {:?}", e);
return Err(e.into());
}
}
@ -328,7 +338,7 @@ impl Authentication for FabFire {
let apdu_response = match response {
CardCommand::readPICC { data } => { APDUResponse::new(&*data) }
_ => {
// eprintln!("Unexpected response: {:?}", response);
tracing::error!("Unexpected response: {:?}", response);
return Err(FabFireError::ParseError.into());
}
};
@ -340,18 +350,18 @@ impl Authentication for FabFire {
Some(data) => {
let received_urn = String::from_utf8(data).unwrap();
if received_urn != self.local_urn {
// eprintln!("URN mismatch: {:?} != {:?}", received_urn, self.local_urn);
tracing::error!("URN mismatch: {:?} != {:?}", received_urn, self.local_urn);
return Err(FabFireError::ParseError.into());
}
}
None => {
// eprintln!("No data in response");
tracing::error!("No data returned from card");
return Err(FabFireError::ParseError.into());
}
};
}
Err(e) => {
// eprintln!("Invalid response: {:?}", e);
tracing::error!("Got invalid APDUResponse: {:?}", e);
return Err(FabFireError::ParseError.into());
}
}
@ -361,11 +371,13 @@ impl Authentication for FabFire {
let buf = match self.desfire.read_data_chunk_cmd(TOKEN_FILE_ID, 0, MAX_BYTES_PER_TRANSACTION) { // TODO: support data longer than 47 Bytes
Ok(buf) => match Vec::<u8>::try_from(buf) {
Ok(data) => data,
Err(_) => {
Err(e) => {
tracing::error!("Failed to convert APDUCommand to Vec<u8>: {:?}", e);
return Err(FabFireError::SerializationError.into());
}
},
Err(_) => {
Err(e) => {
tracing::error!("Failed to generate APDUCommand: {:?}", e);
return Err(FabFireError::SerializationError.into());
}
};
@ -376,7 +388,8 @@ impl Authentication for FabFire {
writer.write_all(&send_buf).map_err(|e| SessionError::Io { source: e })?;
Ok(rsasl::session::Step::NeedsMore(Some(send_buf.len())))
}
Err(_) => {
Err(e) => {
tracing::error!("Failed to serialize APDUCommand: {:?}", e);
Err(FabFireError::SerializationError.into())
}
};
@ -389,7 +402,7 @@ impl Authentication for FabFire {
Some(buf) => match serde_json::from_slice(buf).map_err(|e| FabFireError::DeserializationError(e)) {
Ok(response) => response,
Err(e) => {
// eprintln!("{:?}", e);
tracing::error!("Deserializing data from card failed: {:?}", e);
return Err(e.into());
}
}
@ -398,7 +411,7 @@ impl Authentication for FabFire {
let apdu_response = match response {
CardCommand::readPICC { data } => { APDUResponse::new(&*data) }
_ => {
// eprintln!("Unexpected response: {:?}", response);
tracing::error!("Unexpected response: {:?}", response);
return Err(FabFireError::ParseError.into());
}
};
@ -413,22 +426,24 @@ impl Authentication for FabFire {
let key = match session.get_property_or_callback::<FabFireCardKey>() {
Ok(Some(key)) => Box::from(key.as_slice()),
Ok(None) => {
tracing::error!("No keys on file for token");
return Err(FabFireError::InvalidCredentials("No keys on file for token".to_string()).into());
}
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 => {
// eprintln!("No data in response");
tracing::error!("No data in response");
return Err(FabFireError::ParseError.into());
}
};
}
Err(e) => {
// eprintln!("Invalid response: {:?}", e);
tracing::error!("Failed to check response: {:?}", e);
return Err(FabFireError::ParseError.into());
}
}
@ -436,11 +451,13 @@ impl Authentication for FabFire {
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(_) => {
Err(e) => {
tracing::error!("Failed to convert to Vec<u8>: {:?}", e);
return Err(FabFireError::SerializationError.into());
}
},
Err(_) => {
Err(e) => {
tracing::error!("Failed to create authenticate command: {:?}", e);
return Err(FabFireError::SerializationError.into());
}
};
@ -451,19 +468,20 @@ impl Authentication for FabFire {
writer.write_all(&send_buf).map_err(|e| SessionError::Io { source: e })?;
Ok(rsasl::session::Step::NeedsMore(Some(send_buf.len())))
}
Err(_) => {
Err(e) => {
tracing::error!("Failed to serialize command: {:?}", e);
Err(FabFireError::SerializationError.into())
}
};
}
Step::Authenticate1 => {
// println!("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) => {
// eprintln!("{:?}", e);
tracing::error!("Failed to deserialize response: {:?}", e);
return Err(e.into());
}
}
@ -472,7 +490,7 @@ impl Authentication for FabFire {
let apdu_response = match response {
CardCommand::readPICC { data } => { APDUResponse::new(&*data) }
_ => {
// eprintln!("Unexpected response: {:?}", response);
tracing::error!("Unexpected response: {:?}", response);
return Err(FabFireError::ParseError.into());
}
};
@ -487,7 +505,6 @@ impl Authentication for FabFire {
//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();
// println!("RND_A: {:x?}", rnd_a);
let (cmd_challenge_response,
rnd_b,
@ -498,7 +515,8 @@ impl Authentication for FabFire {
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(_) => {
Err(e) => {
tracing::error!("Failed to convert to Vec<u8>: {:?}", e);
return Err(FabFireError::SerializationError.into());
}
};
@ -509,17 +527,20 @@ impl Authentication for FabFire {
writer.write_all(&send_buf).map_err(|e| SessionError::Io { source: e })?;
Ok(rsasl::session::Step::NeedsMore(Some(send_buf.len())))
}
Err(_) => {
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(_) => {
Err(e) => {
tracing::error!("Failed to check response: {:?}", e);
return Err(FabFireError::ParseError.into());
}
}
@ -531,7 +552,7 @@ impl Authentication for FabFire {
Some(buf) => match serde_json::from_slice(buf).map_err(|e| FabFireError::DeserializationError(e)) {
Ok(response) => response,
Err(e) => {
// eprintln!("{:?}", e);
tracing::error!("Failed to deserialize response: {:?}", e);
return Err(e.into());
}
}
@ -540,7 +561,7 @@ impl Authentication for FabFire {
let apdu_response = match response {
CardCommand::readPICC { data } => { APDUResponse::new(&*data) }
_ => {
// eprintln!("Unexpected response: {:?}", response);
tracing::error!("Got invalid response: {:?}", response);
return Err(FabFireError::ParseError.into());
}
};
@ -570,7 +591,8 @@ impl Authentication for FabFire {
writer.write_all(&send_buf).map_err(|e| SessionError::Io { source: e })?;
return Ok(rsasl::session::Step::Done(Some(send_buf.len())))
}
Err(_) => {
Err(e) => {
tracing::error!("Failed to serialize command: {:?}", e);
Err(FabFireError::SerializationError.into())
}
};
@ -579,11 +601,13 @@ impl Authentication for FabFire {
}
}
None => {
tracing::error!("got empty response");
return Err(FabFireError::ParseError.into());
}
};
}
Err(_) => {
Err(e) => {
tracing::error!("Got invalid response: {:?}", apdu_response);
return Err(FabFireError::InvalidCredentials(format!("{}", apdu_response)).into());
}
}

25
bffhd/authentication/mod.rs
View File

@ -5,9 +5,10 @@ use rsasl::mechname::Mechname;
use rsasl::property::{AuthId, Password};
use rsasl::session::{Session, SessionData};
use rsasl::validate::{validations, Validation};
use rsasl::{SASL};
use rsasl::{Property, SASL};
use std::sync::Arc;
use rsasl::registry::Mechanism;
use crate::authentication::fabfire::FabFireCardKey;
mod fabfire;
@ -20,6 +21,28 @@ impl Callback {
}
}
impl rsasl::callback::Callback for Callback {
fn provide_prop(
&self,
session: &mut rsasl::session::SessionData,
property: Property,
) -> Result<(), SessionError> {
match property {
fabfire::FABFIRECARDKEY => {
let authcid = session.get_property_or_callback::<AuthId>()?;
let user = self.users.get_user(authcid.unwrap().as_ref())
.ok_or(SessionError::AuthenticationFailure)?;
let kv = user.userdata.kv.get("cardkey")
.ok_or(SessionError::AuthenticationFailure)?;
let card_key = <[u8; 16]>::try_from(hex::decode(kv)
.map_err(|_| SessionError::AuthenticationFailure)?)
.map_err(|_| SessionError::AuthenticationFailure)?;
session.set_property::<FabFireCardKey>(Arc::new(card_key));
Ok(())
}
_ => Err(SessionError::NoProperty { property }),
}
}
fn validate(
&self,
session: &mut SessionData,

2
bffhd/users/db.rs
View File

@ -63,7 +63,7 @@ pub struct UserData {
/// Additional data storage
#[serde(flatten, skip_serializing_if = "HashMap::is_empty")]
kv: HashMap<String, String>,
pub kv: HashMap<String, String>,
}
impl UserData {

3
examples/users.toml
View File

@ -11,3 +11,6 @@ passwd = "secret"
# It will get stored in the `kv` field in UserData.
# This is not used for anything at the moment
noot = "noot!"
# Store the card specific AES key in kv userdata
cardkey = "7ab8704a61b5317e1fe4cae9e3e1fd8d"