Add libnfc backend to nfc transport

Author: mikma

Cargo.lock

@@ -18,6 +18,11 @@ hid-device-tests = ["virtual-hid-device"]
 virtual-hid-device = ["solo"]
 nfc = ["apdu-core", "apdu", "thiserror"]
 pcsc = [ "nfc", "dep:pcsc" ]
+libnfc = [
+  "nfc",
+  "nfc1-sys",
+  "nfc1",
+]
 
 [dependencies]
 base64-url = "2.0.0"
@@ -71,6 +76,8 @@ apdu-core = { version = "0.4.0", optional = true }
 apdu = { version = "0.4.0", optional = true }
 thiserror = { version = "2.0.12", optional = true }
 pcsc = { version = "2.9.0", optional = true }
+nfc1 = { version = "0.6.0", optional = true, default-features = false }
+nfc1-sys = { version = "0.3.9", optional = true, default-features = false }
 
 
 [dev-dependencies]

libwebauthn/Cargo.toml

@@ -9,12 +9,16 @@ use crate::transport::device::Device;
 use crate::transport::error::Error;
 
 use super::channel::NfcChannel;
+#[cfg(feature = "libnfc")]
+use super::libnfc;
 #[cfg(feature = "pcsc")]
 use super::pcsc;
 use super::{Context, Nfc};
 
 #[derive(Debug)]
 enum DeviceInfo {
+    #[cfg(feature = "libnfc")]
+    LibNfc(libnfc::Info),
     #[cfg(feature = "pcsc")]
     Pcsc(pcsc::Info),
 }
@@ -27,6 +31,8 @@ pub struct NfcDevice {
 impl fmt::Display for DeviceInfo {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match &self {
+            #[cfg(feature = "libnfc")]
+            DeviceInfo::LibNfc(info) => write!(f, "{}", info),
             #[cfg(feature = "pcsc")]
             DeviceInfo::Pcsc(info) => write!(f, "{}", info),
         }
@@ -40,6 +46,13 @@ impl fmt::Display for NfcDevice {
 }
 
 impl NfcDevice {
+    #[cfg(feature = "libnfc")]
+    pub fn new_libnfc(info: libnfc::Info) -> Self {
+        NfcDevice {
+            info: DeviceInfo::LibNfc(info),
+        }
+    }
+
     #[cfg(feature = "pcsc")]
     pub fn new_pcsc(info: pcsc::Info) -> Self {
         NfcDevice {
@@ -53,6 +66,8 @@ impl NfcDevice {
         trace!("nfc channel {:?}", self);
         let (mut channel, recv): (NfcChannel<Context>, mpsc::Receiver<UxUpdate>) = match &self.info
         {
+            #[cfg(feature = "libnfc")]
+            DeviceInfo::LibNfc(info) => info.channel(),
             #[cfg(feature = "pcsc")]
             DeviceInfo::Pcsc(info) => info.channel(),
         }?;
@@ -92,6 +107,8 @@ where
 pub async fn list_devices() -> Result<Vec<NfcDevice>, Error> {
     let mut all_devices = Vec::new();
     let list_devices_fns = [
+        #[cfg(feature = "libnfc")]
+        libnfc::list_devices,
         #[cfg(feature = "pcsc")]
         pcsc::list_devices,
     ];