1 files changed, 54 insertions, 0 deletions
diff --git a/third_party/rust/authenticator/src/ctap2/commands/get_next_assertion.rs b/third_party/rust/authenticator/src/ctap2/commands/get_next_assertion.rs
new file mode 100644
index 0000000000..b75bb51b08
--- /dev/null
+++ b/third_party/rust/authenticator/src/ctap2/commands/get_next_assertion.rs
@@ -0,0 +1,54 @@
+use super::{Command, CommandError, RequestCtap2, StatusCode};
+use crate::ctap2::commands::get_assertion::GetAssertionResponse;
+use crate::transport::errors::HIDError;
+use crate::transport::{FidoDevice, VirtualFidoDevice};
+use serde_cbor::{de::from_slice, Value};
+
+#[derive(Debug)]
+pub(crate) struct GetNextAssertion;
+
+impl RequestCtap2 for GetNextAssertion {
+    type Output = GetAssertionResponse;
+
+    fn command(&self) -> Command {
+        Command::GetNextAssertion
+    }
+
+    fn wire_format(&self) -> Result<Vec<u8>, HIDError> {
+        Ok(Vec::new())
+    }
+
+    fn handle_response_ctap2<Dev: FidoDevice>(
+        &self,
+        _dev: &mut Dev,
+        input: &[u8],
+    ) -> Result<Self::Output, HIDError> {
+        if input.is_empty() {
+            return Err(CommandError::InputTooSmall.into());
+        }
+
+        let status: StatusCode = input[0].into();
+        debug!("response status code: {:?}", status);
+        if input.len() > 1 {
+            if status.is_ok() {
+                let assertion = from_slice(&input[1..]).map_err(CommandError::Deserializing)?;
+                // TODO(baloo): check assertion response does not have numberOfCredentials
+                Ok(assertion)
+            } else {
+                let data: Value = from_slice(&input[1..]).map_err(CommandError::Deserializing)?;
+                Err(CommandError::StatusCode(status, Some(data)).into())
+            }
+        } else if status.is_ok() {
+            Err(CommandError::InputTooSmall.into())
+        } else {
+            Err(CommandError::StatusCode(status, None).into())
+        }
+    }
+
+    fn send_to_virtual_device<Dev: VirtualFidoDevice>(
+        &self,
+        _dev: &mut Dev,
+    ) -> Result<Self::Output, HIDError> {
+        unimplemented!()
+    }
+}