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initial integration of the X-FABFIRE mechnism

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Integrates the fabfire mechanism for use with the jorisdevice and desfire cards
This commit is contained in:
Kai Jan Kriegel 2022-03-12 00:45:59 +01:00
parent c8623fd62b
commit 4611ed5b48
6 changed files with 555 additions and 6 deletions
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94
Cargo.lock generated
View File

@ -23,6 +23,18 @@ dependencies = [
"pretty",
]
[[package]]
name = "aes"
version = "0.7.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9e8b47f52ea9bae42228d07ec09eb676433d7c4ed1ebdf0f1d1c29ed446f1ab8"
dependencies = [
"cfg-if",
"cipher",
"cpufeatures",
"opaque-debug 0.3.0",
]
[[package]]
name = "annotate-snippets"
version = "0.9.1"
@ -253,7 +265,7 @@ version = "0.7.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c0940dc441f31689269e10ac70eb1002a3a1d3ad1390e030043662eb7fe4688b"
dependencies = [
"block-padding",
"block-padding 0.1.5",
"byte-tools",
"byteorder",
"generic-array 0.12.4",
@ -277,6 +289,16 @@ dependencies = [
"generic-array 0.14.5",
]
[[package]]
name = "block-modes"
version = "0.8.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2cb03d1bed155d89dce0f845b7899b18a9a163e148fd004e1c28421a783e2d8e"
dependencies = [
"block-padding 0.2.1",
"cipher",
]
[[package]]
name = "block-padding"
version = "0.1.5"
@ -286,6 +308,12 @@ dependencies = [
"byte-tools",
]
[[package]]
name = "block-padding"
version = "0.2.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8d696c370c750c948ada61c69a0ee2cbbb9c50b1019ddb86d9317157a99c2cae"
[[package]]
name = "blocking"
version = "1.1.0"
@ -378,6 +406,15 @@ version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
[[package]]
name = "cipher"
version = "0.3.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7ee52072ec15386f770805afd189a01c8841be8696bed250fa2f13c4c0d6dfb7"
dependencies = [
"generic-array 0.14.5",
]
[[package]]
name = "clap"
version = "2.34.0"
@ -447,6 +484,32 @@ dependencies = [
"typenum",
]
[[package]]
name = "des"
version = "0.7.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ac41dd49fb554432020d52c875fc290e110113f864c6b1b525cd62c7e7747a5d"
dependencies = [
"byteorder",
"cipher",
"opaque-debug 0.3.0",
]
[[package]]
name = "desfire"
version = "0.1.0"
source = "git+https://gitlab.com/fabinfra/fabaccess/nfc_rs.git?branch=main#34d1d7f3a062f007fcdc229995f9013970e460a5"
dependencies = [
"aes",
"block-modes",
"des",
"hex",
"num-derive",
"num-traits",
"rand",
"simple-error",
]
[[package]]
name = "dhall"
version = "0.11.0"
@ -497,6 +560,7 @@ dependencies = [
"capnp-rpc",
"capnpc",
"clap",
"desfire",
"easy-parallel",
"flexbuffers",
"futures 0.3.21",
@ -504,8 +568,10 @@ dependencies = [
"futures-test",
"futures-util",
"genawaiter",
"hex",
"lazy_static",
"libc",
"linkme",
"lmdb-rkv",
"rand",
"rsasl",
@ -1131,6 +1197,26 @@ dependencies = [
"winapi",
]
[[package]]
name = "num-derive"
version = "0.3.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "876a53fff98e03a936a674b29568b0e605f06b29372c2489ff4de23f1949743d"
dependencies = [
"proc-macro2",
"quote",
"syn",
]
[[package]]
name = "num-traits"
version = "0.2.14"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9a64b1ec5cda2586e284722486d802acf1f7dbdc623e2bfc57e65ca1cd099290"
dependencies = [
"autocfg",
]
[[package]]
name = "num_cpus"
version = "1.13.1"
@ -1703,6 +1789,12 @@ dependencies = [
"libc",
]
[[package]]
name = "simple-error"
version = "0.2.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "cc47a29ce97772ca5c927f75bac34866b16d64e07f330c3248e2d7226623901b"
[[package]]
name = "slab"
version = "0.4.5"

9
Cargo.toml
View File

@ -47,8 +47,8 @@ uuid = { version = "0.8.2", features = ["serde", "v4"] }
clap = "2.33.3"
# TODO update this if bindgen breaks (again)
rsasl = "2.0.0-preview2"
#rsasl = { path = "../../rsasl" }
rsasl = { version = "2.0.0-preview2", features = ["unstable_custom_mechanism", "registry_static"] }
#rsasl = { path = "../../rsasl", features = ["unstable_custom_mechanism", "registry_static"] }
rumqttc = { version = "0.10", features = ["url"] }
async-compat = "0.2.1"
@ -75,6 +75,11 @@ rustls = "0.19"
rustls-pemfile = "0.2"
async-rustls = "0.2"
# Desfire
desfire = { git = "https://gitlab.com/fabinfra/fabaccess/nfc_rs.git", branch = "main" }
hex = "0.4.3"
linkme = "0.2"
[build-dependencies]
capnpc = "0.14.4"
# Used in build.rs to iterate over all files in schema/

7
Dockerfile.dev Normal file
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@ -0,0 +1,7 @@
# Setup build image for multistage build
FROM rust:latest
# install build deps
RUN apt-get update && apt-get upgrade -y
RUN apt-get install -yqq --no-install-recommends capnproto build-essential cmake clang libclang-dev libgsasl7-dev
COPY ../nfc_rs /nfc_rs

11
src/api/auth.rs
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@ -30,6 +30,9 @@ use crate::db::Databases;
use crate::db::user::{Internal as UserDB, User};
use crate::db::access::AccessControl as AccessDB;
mod fabfire;
use fabfire::FABFIRE;
pub struct AppData {
userdb: Arc<UserDB>,
}
@ -83,6 +86,7 @@ pub struct Auth {
impl Auth {
pub fn new(log: Logger, dbs: Databases, session: Rc<RefCell<Option<Session>>>) -> Self {
let mut ctx = SASL::new();
ctx.register(&FABFIRE);
ctx.install_callback(Arc::new(CB::new(dbs.userdb.clone())));
Self { log, ctx, session, userdb: dbs.userdb.clone(), access: dbs.access.clone() }
@ -111,9 +115,10 @@ impl authentication_system::Server for Auth {
for (i, m) in mechvec.into_iter().enumerate() {
res_mechs.set(i as u32, m);
}*/
// For now, only PLAIN
let mut res_mechs = res.get().init_mechs(1);
// For now, only PLAIN and X-FABFIRE
let mut res_mechs = res.get().init_mechs(2);
res_mechs.set(0, "PLAIN");
res_mechs.set(1, "X-FABFIRE");
Promise::ok(())
}
@ -128,7 +133,7 @@ impl authentication_system::Server for Auth {
// Extract the MECHANISM the client wants to use and start a session.
// Or fail at that and thrown an exception TODO: return Outcome
let mech = pry!(req.get_mechanism());
if pry!(req.get_mechanism()) != "PLAIN" {
if mech != "PLAIN" || mech != "X-FABFIRE" {
return Promise::err(capnp::Error {
kind: capnp::ErrorKind::Failed,
description: format!("Invalid SASL mech"),

20
src/api/auth/fabfire.rs Normal file
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@ -0,0 +1,20 @@
mod server;
pub use server::FabFire;
use rsasl::mechname::Mechname;
use rsasl::registry::{Mechanism, MECHANISMS};
use rsasl::session::Side;
const MECHNAME: &'static Mechname = &Mechname::const_new_unchecked(b"X-FABFIRE");
#[linkme::distributed_slice(MECHANISMS)]
pub static FABFIRE: Mechanism = Mechanism {
mechanism: MECHNAME,
priority: 300,
// In this situation there's one struct for both sides, however you can just as well use
// different types than then have different `impl Authentication` instead of checking a value
// in self.
client: None,
server: Some(FabFire::new_server),
first: Side::Client,
};

420
src/api/auth/fabfire/server.rs Normal file
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@ -0,0 +1,420 @@
use std::fmt::{Debug, Display, Formatter};
use std::io::Write;
use rsasl::error::{MechanismError, MechanismErrorKind, SASLError, SessionError};
use rsasl::mechanism::Authentication;
use rsasl::SASL;
use rsasl::session::{SessionData, StepResult};
use serde::{Deserialize, Serialize};
use desfire::desfire::Desfire;
use desfire::iso7816_4::apducommand::APDUCommand;
use desfire::iso7816_4::apduresponse::APDUResponse;
use desfire::error::{Error as DesfireError, Error};
use std::convert::TryFrom;
use std::ops::Deref;
enum FabFireError {
ParseError,
SerializationError,
CardError(DesfireError),
}
impl Debug for FabFireError {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
match self {
FabFireError::ParseError => write!(f, "ParseError"),
FabFireError::SerializationError => write!(f, "SerializationError"),
FabFireError::CardError(err) => write!(f, "CardError: {}", err),
}
}
}
impl Display for FabFireError {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
match self {
FabFireError::ParseError => write!(f, "ParseError"),
FabFireError::SerializationError => write!(f, "SerializationError"),
FabFireError::CardError(err) => write!(f, "CardError: {}", err),
}
}
}
impl MechanismError for FabFireError {
fn kind(&self) -> MechanismErrorKind {
match self {
FabFireError::ParseError => MechanismErrorKind::Parse,
FabFireError::SerializationError => MechanismErrorKind::Protocol,
FabFireError::CardError(_) => MechanismErrorKind::Protocol,
}
}
}
#[derive(Debug, Deserialize, Serialize)]
struct CardInfo {
card_uid: [u8; 7],
key_old: Option<Box<[u8]>>,
key_new: Option<Box<[u8]>>
}
struct KeyInfo {
key_id: u8,
key: Box<[u8]>
}
struct AuthInfo {
rnd_a: Vec<u8>,
rnd_b: Vec<u8>,
iv: Vec<u8>
}
#[derive(Debug, Deserialize, Serialize)]
#[serde(tag = "Cmd")]
enum CardCommand {
message {
msg_id: Option<u32>,
clr_txt: Option<String>,
addn_txt: Option<String>,
},
sendPICC {
data: String
},
haltPICC,
Key {
data: String
},
ConfirmUser
}
enum Step {
New,
SelectApp,
VerifyMagic,
GetURN,
GetToken,
Authenticate1,
Authenticate2,
Authenticate3,
}
pub struct FabFire {
step: Step,
card_info: Option<CardInfo>,
key_info: Option<KeyInfo>,
auth_info: Option<AuthInfo>,
app_id: u32,
local_urn: String,
desfire: Desfire,
}
const MAGIC: &'static str = "FABACCESS\0DESFIRE\01.0\0";
impl FabFire {
pub fn new_server(_sasl: &SASL) -> Result<Box<dyn Authentication>, SASLError> {
Ok(Box::new(Self { step: Step::New, card_info: None, key_info: None, auth_info: None, app_id: 1, local_urn: "urn:fabaccess:lab:innovisionlab".to_string(), desfire: Desfire { card: None, session_key: None, cbc_iv: None } }))
}
}
impl Authentication for FabFire {
fn step(&mut self, session: &mut SessionData, input: Option<&[u8]>, writer: &mut dyn Write) -> StepResult {
match self.step {
Step::New => {
//receive card info (especially card UID) from reader
return match input {
None => { Err(SessionError::InputDataRequired) },
Some(cardinfo) => {
self.card_info = match serde_json::from_slice(cardinfo) {
Ok(card_info) => Some(card_info),
Err(_) => {
return Err(FabFireError::ParseError.into())
}
};
self.step = Step::SelectApp;
Ok(rsasl::session::Step::NeedsMore(None))
}
}
}
Step::SelectApp => {
//select application
let buf = match self.desfire.select_application_cmd(self.app_id) {
Ok(buf) => match Vec::<u8>::try_from(buf) {
Ok(data) => data,
Err(_) => {
return Err(FabFireError::SerializationError.into())
}
},
Err(_) => {
return Err(FabFireError::SerializationError.into())
}
};
let cmd = CardCommand::sendPICC { data: hex::encode_upper(buf) };
return match serde_json::to_writer(writer, &cmd) {
Ok(_) => {
self.step = Step::VerifyMagic;
Ok(rsasl::session::Step::NeedsMore(None))
}
Err(_) => {
Err(FabFireError::SerializationError.into())
}
}
}
Step::VerifyMagic => {
// check that we successfully selected the application
let response = match input {
None => {return Err(SessionError::InputDataRequired)},
Some(buf) => APDUResponse::new(buf)
};
response.check().map_err(|e| FabFireError::CardError(e))?;
// request the contents of the file containing the magic string
const MAGIC_FILE_ID: u8 = 0x01;
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(_) => {
return Err(FabFireError::SerializationError.into())
}
},
Err(_) => {
return Err(FabFireError::SerializationError.into())
}
};
let cmd = CardCommand::sendPICC { data: hex::encode_upper(buf) };
return match serde_json::to_writer(writer, &cmd) {
Ok(_) => {
self.step = Step::GetURN;
Ok(rsasl::session::Step::NeedsMore(None))
}
Err(_) => {
Err(FabFireError::SerializationError.into())
}
}
}
Step::GetURN => {
// verify the magic string to determine that we have a valid fabfire card
let response = match input {
None => {return Err(SessionError::InputDataRequired)},
Some(buf) => APDUResponse::new(buf)
};
match response.check() {
Ok(_) => {
match response.body {
Some(data) => {
if std::str::from_utf8(data.as_slice()) != Ok(MAGIC) {
return Err(FabFireError::ParseError.into());
}
}
None => {
return Err(FabFireError::ParseError.into())
}
};
}
Err(_) => {
return Err(FabFireError::ParseError.into());
}
}
// request the contents of the file containing the URN
const URN_FILE_ID: u8 = 0x02;
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(_) => {
return Err(FabFireError::SerializationError.into())
}
},
Err(_) => {
return Err(FabFireError::SerializationError.into())
}
};
let cmd = CardCommand::sendPICC { data: hex::encode_upper(buf) };
return match serde_json::to_writer(writer, &cmd) {
Ok(_) => {
self.step = Step::GetToken;
Ok(rsasl::session::Step::NeedsMore(None))
}
Err(_) => {
Err(FabFireError::SerializationError.into())
}
}
}
Step::GetToken => {
// parse the urn and match it to our local urn
let response = match input {
None => {return Err(SessionError::InputDataRequired)},
Some(buf) => APDUResponse::new(buf)
};
match response.check() {
Ok(_) => {
match response.body {
Some(data) => {
if String::from_utf8(data).unwrap() != self.local_urn {
return Err(FabFireError::ParseError.into());
}
}
None => {
return Err(FabFireError::ParseError.into())
}
};
}
Err(_) => {
return Err(FabFireError::ParseError.into());
}
}
// request the contents of the file containing the URN
const TOKEN_FILE_ID: u8 = 0x03;
let buf = match self.desfire.read_data_chunk_cmd(TOKEN_FILE_ID, 0, 47) { // TODO: support data longer than 47 Bytes
Ok(buf) => match Vec::<u8>::try_from(buf) {
Ok(data) => data,
Err(_) => {
return Err(FabFireError::SerializationError.into())
}
},
Err(_) => {
return Err(FabFireError::SerializationError.into())
}
};
let cmd = CardCommand::sendPICC { data: hex::encode_upper(buf) };
return match serde_json::to_writer(writer, &cmd) {
Ok(_) => {
self.step = Step::Authenticate1;
Ok(rsasl::session::Step::NeedsMore(None))
}
Err(_) => {
Err(FabFireError::SerializationError.into())
}
}
}
Step::Authenticate1 => {
// parse the token and select the appropriate user
let response = match input {
None => {return Err(SessionError::InputDataRequired)},
Some(buf) => APDUResponse::new(buf)
};
match response.check() {
Ok(_) => {
match response.body {
Some(data) => {
if String::from_utf8(data).unwrap() != "LoremIpsum" { // FIXME: match against user db
return Err(FabFireError::ParseError.into());
}
}
None => {
return Err(FabFireError::ParseError.into())
}
};
}
Err(_) => {
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(_) => {
return Err(FabFireError::SerializationError.into())
}
},
Err(_) => {
return Err(FabFireError::SerializationError.into())
}
};
let cmd = CardCommand::sendPICC { data: hex::encode_upper(buf) };
return match serde_json::to_writer(writer, &cmd) {
Ok(_) => {
self.step = Step::Authenticate2;
Ok(rsasl::session::Step::NeedsMore(None))
}
Err(_) => {
Err(FabFireError::SerializationError.into())
}
}
}
Step::Authenticate2 => {
let response = match input {
None => {return Err(SessionError::InputDataRequired)},
Some(buf) => APDUResponse::new(buf)
};
match response.check() {
Ok(_) => {
match 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();
println!("RND_A: {:x?}", rnd_a);
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(_) => {
return Err(FabFireError::SerializationError.into())
}
};
let cmd = CardCommand::sendPICC { data: hex::encode_upper(buf) };
return match serde_json::to_writer(writer, &cmd) {
Ok(_) => {
self.step = Step::Authenticate3;
Ok(rsasl::session::Step::NeedsMore(None))
}
Err(_) => {
Err(FabFireError::SerializationError.into())
}
}
}
None => {
return Err(FabFireError::ParseError.into())
}
};
}
Err(_) => {
return Err(FabFireError::ParseError.into());
}
}
}
Step::Authenticate3 => {
let response = match input {
None => {return Err(SessionError::InputDataRequired)},
Some(buf) => APDUResponse::new(buf)
};
match response.check() {
Ok(_) => {
match 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() {
// TODO: Do stuff with the info that we are authenticated
return Ok(rsasl::session::Step::Done(None));
}
}
}
}
None => {
return Err(FabFireError::ParseError.into())
}
};
}
Err(_) => {
return Err(FabFireError::ParseError.into());
}
}
}
}
return Ok(rsasl::session::Step::Done(None));
}
}