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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/. */
use std::fs::{File, OpenOptions};
use std::io;
use std::io::{Read, Write};
use std::os::windows::io::AsRawHandle;
use super::winapi::DeviceCapabilities;
use crate::consts::{CID_BROADCAST, FIDO_USAGE_PAGE, FIDO_USAGE_U2FHID, MAX_HID_RPT_SIZE};
use crate::u2ftypes::{U2FDevice, U2FDeviceInfo};
#[derive(Debug)]
pub struct Device {
path: String,
file: File,
cid: [u8; 4],
dev_info: Option<U2FDeviceInfo>,
}
impl Device {
pub fn new(path: String) -> io::Result<Self> {
let file = OpenOptions::new().read(true).write(true).open(&path)?;
Ok(Self {
path,
file,
cid: CID_BROADCAST,
dev_info: None,
})
}
pub fn is_u2f(&self) -> bool {
match DeviceCapabilities::new(self.file.as_raw_handle()) {
Ok(caps) => caps.usage() == FIDO_USAGE_U2FHID && caps.usage_page() == FIDO_USAGE_PAGE,
_ => false,
}
}
}
impl PartialEq for Device {
fn eq(&self, other: &Device) -> bool {
self.path == other.path
}
}
impl Read for Device {
fn read(&mut self, bytes: &mut [u8]) -> io::Result<usize> {
// Windows always includes the report ID.
let mut input = [0u8; MAX_HID_RPT_SIZE + 1];
let _ = self.file.read(&mut input)?;
bytes.clone_from_slice(&input[1..]);
Ok(bytes.len() as usize)
}
}
impl Write for Device {
fn write(&mut self, bytes: &[u8]) -> io::Result<usize> {
self.file.write(bytes)
}
fn flush(&mut self) -> io::Result<()> {
self.file.flush()
}
}
impl U2FDevice for Device {
fn get_cid<'a>(&'a self) -> &'a [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> {
Err(io::Error::new(io::ErrorKind::Other, "Not implemented"))
}
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);
}
}
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