1 files changed, 181 insertions, 0 deletions
diff --git a/third_party/rust/authenticator/src/transport/linux/device.rs b/third_party/rust/authenticator/src/transport/linux/device.rs
new file mode 100644
index 0000000000..6abd462d48
--- /dev/null
+++ b/third_party/rust/authenticator/src/transport/linux/device.rs
@@ -0,0 +1,181 @@
+/* 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 libc;
+use crate::consts::{Capability, CID_BROADCAST};
+use crate::ctap2::commands::get_info::AuthenticatorInfo;
+use crate::transport::hid::HIDDevice;
+use crate::transport::platform::{hidraw, monitor};
+use crate::transport::{FidoDevice, FidoProtocol, HIDError, SharedSecret};
+use crate::u2ftypes::U2FDeviceInfo;
+use crate::util::from_unix_result;
+use std::fs::OpenOptions;
+use std::hash::{Hash, Hasher};
+use std::io;
+use std::io::{Read, Write};
+use std::os::unix::io::AsRawFd;
+use std::path::PathBuf;
+
+#[derive(Debug)]
+pub struct Device {
+    path: PathBuf,
+    fd: std::fs::File,
+    in_rpt_size: usize,
+    out_rpt_size: usize,
+    cid: [u8; 4],
+    dev_info: Option<U2FDeviceInfo>,
+    secret: Option<SharedSecret>,
+    authenticator_info: Option<AuthenticatorInfo>,
+    protocol: FidoProtocol,
+}
+
+impl PartialEq for Device {
+    fn eq(&self, other: &Device) -> bool {
+        // The path should be the only identifying member for a device
+        // If the path is the same, its the same device
+        self.path == other.path
+    }
+}
+
+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.path.hash(state);
+    }
+}
+
+impl Read for Device {
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+        let bufp = buf.as_mut_ptr() as *mut libc::c_void;
+        let rv = unsafe { libc::read(self.fd.as_raw_fd(), bufp, buf.len()) };
+        from_unix_result(rv as usize)
+    }
+}
+
+impl Write for Device {
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        let bufp = buf.as_ptr() as *const libc::c_void;
+        let rv = unsafe { libc::write(self.fd.as_raw_fd(), bufp, buf.len()) };
+        from_unix_result(rv as usize)
+    }
+
+    // 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 = PathBuf;
+    type Id = PathBuf;
+
+    fn new(path: PathBuf) -> Result<Self, (HIDError, Self::Id)> {
+        debug!("Opening device {:?}", path);
+        let fd = OpenOptions::new()
+            .read(true)
+            .write(true)
+            .open(&path)
+            .map_err(|e| (HIDError::IO(Some(path.clone()), e), path.clone()))?;
+        let (in_rpt_size, out_rpt_size) = hidraw::read_hid_rpt_sizes_or_defaults(fd.as_raw_fd());
+        let mut res = Self {
+            path,
+            fd,
+            in_rpt_size,
+            out_rpt_size,
+            cid: CID_BROADCAST,
+            dev_info: None,
+            secret: None,
+            authenticator_info: None,
+            protocol: FidoProtocol::CTAP2,
+        };
+        if res.is_u2f() {
+            info!("new device {:?}", res.path);
+            Ok(res)
+        } else {
+            Err((HIDError::DeviceNotSupported, res.path))
+        }
+    }
+
+    fn id(&self) -> Self::Id {
+        self.path.clone()
+    }
+
+    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 {
+        self.in_rpt_size
+    }
+
+    fn out_rpt_size(&self) -> usize {
+        self.out_rpt_size
+    }
+
+    fn get_property(&self, prop_name: &str) -> io::Result<String> {
+        monitor::get_property_linux(&self.path, 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 {
+        // During successful init, the broadcast channel id gets replaced by an actual one
+        self.cid != CID_BROADCAST
+    }
+
+    fn is_u2f(&mut self) -> bool {
+        hidraw::is_u2f_device(self.fd.as_raw_fd())
+    }
+
+    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;
+    }
+}