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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
extern crate log;
use crate::consts::{Capability, CID_BROADCAST, MAX_HID_RPT_SIZE};
use crate::ctap2::commands::get_info::AuthenticatorInfo;
use crate::transport::hid::HIDDevice;
use crate::transport::platform::iokit::*;
use crate::transport::{FidoDevice, FidoProtocol, HIDError, SharedSecret};
use crate::u2ftypes::U2FDeviceInfo;
use core_foundation::base::*;
use core_foundation::string::*;
use std::convert::TryInto;
use std::fmt;
use std::hash::{Hash, Hasher};
use std::io;
use std::io::{Read, Write};
use std::sync::mpsc::{Receiver, RecvTimeoutError};
use std::time::Duration;
const READ_TIMEOUT: u64 = 15;
pub struct Device {
device_ref: IOHIDDeviceRef,
cid: [u8; 4],
report_rx: Option<Receiver<Vec<u8>>>,
dev_info: Option<U2FDeviceInfo>,
secret: Option<SharedSecret>,
authenticator_info: Option<AuthenticatorInfo>,
protocol: FidoProtocol,
}
impl Device {
unsafe fn get_property_macos(&self, prop_name: &str) -> io::Result<String> {
let prop_ref = IOHIDDeviceGetProperty(
self.device_ref,
CFString::new(prop_name).as_concrete_TypeRef(),
);
if prop_ref.is_null() {
return Err(io::Error::new(
io::ErrorKind::InvalidData,
format!("IOHIDDeviceGetProperty received nullptr for property {prop_name}"),
));
}
if CFGetTypeID(prop_ref) != CFStringGetTypeID() {
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
format!("IOHIDDeviceGetProperty returned non-string type for property {prop_name}"),
));
}
Ok(CFString::from_void(prop_ref).to_string())
}
}
impl fmt::Debug for Device {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("Device").field("cid", &self.cid).finish()
}
}
impl PartialEq for Device {
fn eq(&self, other_device: &Device) -> bool {
self.device_ref == other_device.device_ref
}
}
impl Eq for Device {}
impl Hash for Device {
fn hash<H: Hasher>(&self, state: &mut H) {
// The path should be the only identifying member for a device
// If the path is the same, its the same device
self.device_ref.hash(state);
}
}
impl Read for Device {
fn read(&mut self, mut bytes: &mut [u8]) -> io::Result<usize> {
if let Some(rx) = &self.report_rx {
let timeout = Duration::from_secs(READ_TIMEOUT);
let data = match rx.recv_timeout(timeout) {
Ok(v) => v,
Err(e) if e == RecvTimeoutError::Timeout => {
return Err(io::Error::new(io::ErrorKind::TimedOut, e));
}
Err(e) => {
return Err(io::Error::new(io::ErrorKind::UnexpectedEof, e));
}
};
bytes.write(&data)
} else {
Err(io::Error::from(io::ErrorKind::Unsupported))
}
}
}
impl Write for Device {
fn write(&mut self, bytes: &[u8]) -> io::Result<usize> {
assert_eq!(bytes.len(), self.out_rpt_size() + 1);
let report_id = i64::from(bytes[0]);
// Skip report number when not using numbered reports.
let start = if report_id == 0x0 { 1 } else { 0 };
let data = &bytes[start..];
let result = unsafe {
IOHIDDeviceSetReport(
self.device_ref,
kIOHIDReportTypeOutput,
report_id.try_into().unwrap(),
data.as_ptr(),
data.len() as CFIndex,
)
};
if result != 0 {
warn!("set_report sending failure = {0:X}", result);
return Err(io::Error::from_raw_os_error(result));
}
trace!("set_report sending success = {0:X}", result);
Ok(bytes.len())
}
// USB HID writes don't buffer, so this will be a nop.
fn flush(&mut self) -> io::Result<()> {
Ok(())
}
}
impl HIDDevice for Device {
type BuildParameters = (IOHIDDeviceRef, Receiver<Vec<u8>>);
type Id = IOHIDDeviceRef;
fn new(dev_ids: Self::BuildParameters) -> Result<Self, (HIDError, Self::Id)> {
let (device_ref, report_rx) = dev_ids;
Ok(Self {
device_ref,
cid: CID_BROADCAST,
report_rx: Some(report_rx),
dev_info: None,
secret: None,
authenticator_info: None,
protocol: FidoProtocol::CTAP2,
})
}
fn id(&self) -> Self::Id {
self.device_ref
}
fn get_cid(&self) -> &[u8; 4] {
&self.cid
}
fn set_cid(&mut self, cid: [u8; 4]) {
self.cid = cid;
}
fn in_rpt_size(&self) -> usize {
MAX_HID_RPT_SIZE
}
fn out_rpt_size(&self) -> usize {
MAX_HID_RPT_SIZE
}
fn get_property(&self, prop_name: &str) -> io::Result<String> {
unsafe { self.get_property_macos(prop_name) }
}
fn get_device_info(&self) -> U2FDeviceInfo {
// unwrap is okay, as dev_info must have already been set, else
// a programmer error
self.dev_info.clone().unwrap()
}
fn set_device_info(&mut self, dev_info: U2FDeviceInfo) {
self.dev_info = Some(dev_info);
}
}
impl FidoDevice for Device {
fn pre_init(&mut self) -> Result<(), HIDError> {
HIDDevice::pre_init(self)
}
fn should_try_ctap2(&self) -> bool {
HIDDevice::get_device_info(self)
.cap_flags
.contains(Capability::CBOR)
}
fn initialized(&self) -> bool {
self.cid != CID_BROADCAST
}
fn is_u2f(&mut self) -> bool {
true
}
fn get_shared_secret(&self) -> Option<&SharedSecret> {
self.secret.as_ref()
}
fn set_shared_secret(&mut self, secret: SharedSecret) {
self.secret = Some(secret);
}
fn get_authenticator_info(&self) -> Option<&AuthenticatorInfo> {
self.authenticator_info.as_ref()
}
fn set_authenticator_info(&mut self, authenticator_info: AuthenticatorInfo) {
self.authenticator_info = Some(authenticator_info);
}
fn get_protocol(&self) -> FidoProtocol {
self.protocol
}
fn downgrade_to_ctap1(&mut self) {
self.protocol = FidoProtocol::CTAP1;
}
}
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